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10466 lines
279 KiB
10466 lines
279 KiB
/* |
|
* fs/nfs/nfs4proc.c |
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* |
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* Client-side procedure declarations for NFSv4. |
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* |
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* Copyright (c) 2002 The Regents of the University of Michigan. |
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* All rights reserved. |
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* |
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* Kendrick Smith <[email protected]> |
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* Andy Adamson <[email protected]> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its |
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* contributors may be used to endorse or promote products derived |
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* from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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|
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#include <linux/mm.h> |
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#include <linux/delay.h> |
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#include <linux/errno.h> |
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#include <linux/string.h> |
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#include <linux/ratelimit.h> |
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#include <linux/printk.h> |
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#include <linux/slab.h> |
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#include <linux/sunrpc/clnt.h> |
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#include <linux/nfs.h> |
|
#include <linux/nfs4.h> |
|
#include <linux/nfs_fs.h> |
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#include <linux/nfs_page.h> |
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#include <linux/nfs_mount.h> |
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#include <linux/namei.h> |
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#include <linux/mount.h> |
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#include <linux/module.h> |
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#include <linux/xattr.h> |
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#include <linux/utsname.h> |
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#include <linux/freezer.h> |
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#include <linux/iversion.h> |
|
|
|
#include "nfs4_fs.h" |
|
#include "delegation.h" |
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#include "internal.h" |
|
#include "iostat.h" |
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#include "callback.h" |
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#include "pnfs.h" |
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#include "netns.h" |
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#include "sysfs.h" |
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#include "nfs4idmap.h" |
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#include "nfs4session.h" |
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#include "fscache.h" |
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#include "nfs42.h" |
|
|
|
#include "nfs4trace.h" |
|
|
|
#ifdef CONFIG_NFS_V4_2 |
|
#include "nfs42.h" |
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#endif /* CONFIG_NFS_V4_2 */ |
|
|
|
#define NFSDBG_FACILITY NFSDBG_PROC |
|
|
|
#define NFS4_BITMASK_SZ 3 |
|
|
|
#define NFS4_POLL_RETRY_MIN (HZ/10) |
|
#define NFS4_POLL_RETRY_MAX (15*HZ) |
|
|
|
/* file attributes which can be mapped to nfs attributes */ |
|
#define NFS4_VALID_ATTRS (ATTR_MODE \ |
|
| ATTR_UID \ |
|
| ATTR_GID \ |
|
| ATTR_SIZE \ |
|
| ATTR_ATIME \ |
|
| ATTR_MTIME \ |
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| ATTR_CTIME \ |
|
| ATTR_ATIME_SET \ |
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| ATTR_MTIME_SET) |
|
|
|
struct nfs4_opendata; |
|
static int _nfs4_recover_proc_open(struct nfs4_opendata *data); |
|
static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
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static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); |
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static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label, struct inode *inode); |
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static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, |
|
struct nfs_fattr *fattr, struct iattr *sattr, |
|
struct nfs_open_context *ctx, struct nfs4_label *ilabel, |
|
struct nfs4_label *olabel); |
|
#ifdef CONFIG_NFS_V4_1 |
|
static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, |
|
const struct cred *cred, |
|
struct nfs4_slot *slot, |
|
bool is_privileged); |
|
static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, |
|
const struct cred *); |
|
static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *, |
|
const struct cred *, bool); |
|
#endif |
|
static void nfs4_bitmask_set(__u32 bitmask[NFS4_BITMASK_SZ], |
|
const __u32 *src, struct inode *inode, |
|
struct nfs_server *server, |
|
struct nfs4_label *label); |
|
|
|
#ifdef CONFIG_NFS_V4_SECURITY_LABEL |
|
static inline struct nfs4_label * |
|
nfs4_label_init_security(struct inode *dir, struct dentry *dentry, |
|
struct iattr *sattr, struct nfs4_label *label) |
|
{ |
|
int err; |
|
|
|
if (label == NULL) |
|
return NULL; |
|
|
|
if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) |
|
return NULL; |
|
|
|
err = security_dentry_init_security(dentry, sattr->ia_mode, |
|
&dentry->d_name, (void **)&label->label, &label->len); |
|
if (err == 0) |
|
return label; |
|
|
|
return NULL; |
|
} |
|
static inline void |
|
nfs4_label_release_security(struct nfs4_label *label) |
|
{ |
|
if (label) |
|
security_release_secctx(label->label, label->len); |
|
} |
|
static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) |
|
{ |
|
if (label) |
|
return server->attr_bitmask; |
|
|
|
return server->attr_bitmask_nl; |
|
} |
|
#else |
|
static inline struct nfs4_label * |
|
nfs4_label_init_security(struct inode *dir, struct dentry *dentry, |
|
struct iattr *sattr, struct nfs4_label *l) |
|
{ return NULL; } |
|
static inline void |
|
nfs4_label_release_security(struct nfs4_label *label) |
|
{ return; } |
|
static inline u32 * |
|
nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) |
|
{ return server->attr_bitmask; } |
|
#endif |
|
|
|
/* Prevent leaks of NFSv4 errors into userland */ |
|
static int nfs4_map_errors(int err) |
|
{ |
|
if (err >= -1000) |
|
return err; |
|
switch (err) { |
|
case -NFS4ERR_RESOURCE: |
|
case -NFS4ERR_LAYOUTTRYLATER: |
|
case -NFS4ERR_RECALLCONFLICT: |
|
return -EREMOTEIO; |
|
case -NFS4ERR_WRONGSEC: |
|
case -NFS4ERR_WRONG_CRED: |
|
return -EPERM; |
|
case -NFS4ERR_BADOWNER: |
|
case -NFS4ERR_BADNAME: |
|
return -EINVAL; |
|
case -NFS4ERR_SHARE_DENIED: |
|
return -EACCES; |
|
case -NFS4ERR_MINOR_VERS_MISMATCH: |
|
return -EPROTONOSUPPORT; |
|
case -NFS4ERR_FILE_OPEN: |
|
return -EBUSY; |
|
default: |
|
dprintk("%s could not handle NFSv4 error %d\n", |
|
__func__, -err); |
|
break; |
|
} |
|
return -EIO; |
|
} |
|
|
|
/* |
|
* This is our standard bitmap for GETATTR requests. |
|
*/ |
|
const u32 nfs4_fattr_bitmap[3] = { |
|
FATTR4_WORD0_TYPE |
|
| FATTR4_WORD0_CHANGE |
|
| FATTR4_WORD0_SIZE |
|
| FATTR4_WORD0_FSID |
|
| FATTR4_WORD0_FILEID, |
|
FATTR4_WORD1_MODE |
|
| FATTR4_WORD1_NUMLINKS |
|
| FATTR4_WORD1_OWNER |
|
| FATTR4_WORD1_OWNER_GROUP |
|
| FATTR4_WORD1_RAWDEV |
|
| FATTR4_WORD1_SPACE_USED |
|
| FATTR4_WORD1_TIME_ACCESS |
|
| FATTR4_WORD1_TIME_METADATA |
|
| FATTR4_WORD1_TIME_MODIFY |
|
| FATTR4_WORD1_MOUNTED_ON_FILEID, |
|
#ifdef CONFIG_NFS_V4_SECURITY_LABEL |
|
FATTR4_WORD2_SECURITY_LABEL |
|
#endif |
|
}; |
|
|
|
static const u32 nfs4_pnfs_open_bitmap[3] = { |
|
FATTR4_WORD0_TYPE |
|
| FATTR4_WORD0_CHANGE |
|
| FATTR4_WORD0_SIZE |
|
| FATTR4_WORD0_FSID |
|
| FATTR4_WORD0_FILEID, |
|
FATTR4_WORD1_MODE |
|
| FATTR4_WORD1_NUMLINKS |
|
| FATTR4_WORD1_OWNER |
|
| FATTR4_WORD1_OWNER_GROUP |
|
| FATTR4_WORD1_RAWDEV |
|
| FATTR4_WORD1_SPACE_USED |
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| FATTR4_WORD1_TIME_ACCESS |
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| FATTR4_WORD1_TIME_METADATA |
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| FATTR4_WORD1_TIME_MODIFY, |
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FATTR4_WORD2_MDSTHRESHOLD |
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#ifdef CONFIG_NFS_V4_SECURITY_LABEL |
|
| FATTR4_WORD2_SECURITY_LABEL |
|
#endif |
|
}; |
|
|
|
static const u32 nfs4_open_noattr_bitmap[3] = { |
|
FATTR4_WORD0_TYPE |
|
| FATTR4_WORD0_FILEID, |
|
}; |
|
|
|
const u32 nfs4_statfs_bitmap[3] = { |
|
FATTR4_WORD0_FILES_AVAIL |
|
| FATTR4_WORD0_FILES_FREE |
|
| FATTR4_WORD0_FILES_TOTAL, |
|
FATTR4_WORD1_SPACE_AVAIL |
|
| FATTR4_WORD1_SPACE_FREE |
|
| FATTR4_WORD1_SPACE_TOTAL |
|
}; |
|
|
|
const u32 nfs4_pathconf_bitmap[3] = { |
|
FATTR4_WORD0_MAXLINK |
|
| FATTR4_WORD0_MAXNAME, |
|
0 |
|
}; |
|
|
|
const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE |
|
| FATTR4_WORD0_MAXREAD |
|
| FATTR4_WORD0_MAXWRITE |
|
| FATTR4_WORD0_LEASE_TIME, |
|
FATTR4_WORD1_TIME_DELTA |
|
| FATTR4_WORD1_FS_LAYOUT_TYPES, |
|
FATTR4_WORD2_LAYOUT_BLKSIZE |
|
| FATTR4_WORD2_CLONE_BLKSIZE |
|
| FATTR4_WORD2_XATTR_SUPPORT |
|
}; |
|
|
|
const u32 nfs4_fs_locations_bitmap[3] = { |
|
FATTR4_WORD0_CHANGE |
|
| FATTR4_WORD0_SIZE |
|
| FATTR4_WORD0_FSID |
|
| FATTR4_WORD0_FILEID |
|
| FATTR4_WORD0_FS_LOCATIONS, |
|
FATTR4_WORD1_OWNER |
|
| FATTR4_WORD1_OWNER_GROUP |
|
| FATTR4_WORD1_RAWDEV |
|
| FATTR4_WORD1_SPACE_USED |
|
| FATTR4_WORD1_TIME_ACCESS |
|
| FATTR4_WORD1_TIME_METADATA |
|
| FATTR4_WORD1_TIME_MODIFY |
|
| FATTR4_WORD1_MOUNTED_ON_FILEID, |
|
}; |
|
|
|
static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src, |
|
struct inode *inode) |
|
{ |
|
unsigned long cache_validity; |
|
|
|
memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst)); |
|
if (!inode || !nfs4_have_delegation(inode, FMODE_READ)) |
|
return; |
|
|
|
cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); |
|
if (!(cache_validity & NFS_INO_REVAL_FORCED)) |
|
cache_validity &= ~(NFS_INO_INVALID_CHANGE |
|
| NFS_INO_INVALID_SIZE); |
|
|
|
if (!(cache_validity & NFS_INO_INVALID_SIZE)) |
|
dst[0] &= ~FATTR4_WORD0_SIZE; |
|
|
|
if (!(cache_validity & NFS_INO_INVALID_CHANGE)) |
|
dst[0] &= ~FATTR4_WORD0_CHANGE; |
|
} |
|
|
|
static void nfs4_bitmap_copy_adjust_setattr(__u32 *dst, |
|
const __u32 *src, struct inode *inode) |
|
{ |
|
nfs4_bitmap_copy_adjust(dst, src, inode); |
|
} |
|
|
|
static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, |
|
struct nfs4_readdir_arg *readdir) |
|
{ |
|
unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE; |
|
__be32 *start, *p; |
|
|
|
if (cookie > 2) { |
|
readdir->cookie = cookie; |
|
memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); |
|
return; |
|
} |
|
|
|
readdir->cookie = 0; |
|
memset(&readdir->verifier, 0, sizeof(readdir->verifier)); |
|
if (cookie == 2) |
|
return; |
|
|
|
/* |
|
* NFSv4 servers do not return entries for '.' and '..' |
|
* Therefore, we fake these entries here. We let '.' |
|
* have cookie 0 and '..' have cookie 1. Note that |
|
* when talking to the server, we always send cookie 0 |
|
* instead of 1 or 2. |
|
*/ |
|
start = p = kmap_atomic(*readdir->pages); |
|
|
|
if (cookie == 0) { |
|
*p++ = xdr_one; /* next */ |
|
*p++ = xdr_zero; /* cookie, first word */ |
|
*p++ = xdr_one; /* cookie, second word */ |
|
*p++ = xdr_one; /* entry len */ |
|
memcpy(p, ".\0\0\0", 4); /* entry */ |
|
p++; |
|
*p++ = xdr_one; /* bitmap length */ |
|
*p++ = htonl(attrs); /* bitmap */ |
|
*p++ = htonl(12); /* attribute buffer length */ |
|
*p++ = htonl(NF4DIR); |
|
p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry))); |
|
} |
|
|
|
*p++ = xdr_one; /* next */ |
|
*p++ = xdr_zero; /* cookie, first word */ |
|
*p++ = xdr_two; /* cookie, second word */ |
|
*p++ = xdr_two; /* entry len */ |
|
memcpy(p, "..\0\0", 4); /* entry */ |
|
p++; |
|
*p++ = xdr_one; /* bitmap length */ |
|
*p++ = htonl(attrs); /* bitmap */ |
|
*p++ = htonl(12); /* attribute buffer length */ |
|
*p++ = htonl(NF4DIR); |
|
p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent))); |
|
|
|
readdir->pgbase = (char *)p - (char *)start; |
|
readdir->count -= readdir->pgbase; |
|
kunmap_atomic(start); |
|
} |
|
|
|
static void nfs4_test_and_free_stateid(struct nfs_server *server, |
|
nfs4_stateid *stateid, |
|
const struct cred *cred) |
|
{ |
|
const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops; |
|
|
|
ops->test_and_free_expired(server, stateid, cred); |
|
} |
|
|
|
static void __nfs4_free_revoked_stateid(struct nfs_server *server, |
|
nfs4_stateid *stateid, |
|
const struct cred *cred) |
|
{ |
|
stateid->type = NFS4_REVOKED_STATEID_TYPE; |
|
nfs4_test_and_free_stateid(server, stateid, cred); |
|
} |
|
|
|
static void nfs4_free_revoked_stateid(struct nfs_server *server, |
|
const nfs4_stateid *stateid, |
|
const struct cred *cred) |
|
{ |
|
nfs4_stateid tmp; |
|
|
|
nfs4_stateid_copy(&tmp, stateid); |
|
__nfs4_free_revoked_stateid(server, &tmp, cred); |
|
} |
|
|
|
static long nfs4_update_delay(long *timeout) |
|
{ |
|
long ret; |
|
if (!timeout) |
|
return NFS4_POLL_RETRY_MAX; |
|
if (*timeout <= 0) |
|
*timeout = NFS4_POLL_RETRY_MIN; |
|
if (*timeout > NFS4_POLL_RETRY_MAX) |
|
*timeout = NFS4_POLL_RETRY_MAX; |
|
ret = *timeout; |
|
*timeout <<= 1; |
|
return ret; |
|
} |
|
|
|
static int nfs4_delay_killable(long *timeout) |
|
{ |
|
might_sleep(); |
|
|
|
freezable_schedule_timeout_killable_unsafe( |
|
nfs4_update_delay(timeout)); |
|
if (!__fatal_signal_pending(current)) |
|
return 0; |
|
return -EINTR; |
|
} |
|
|
|
static int nfs4_delay_interruptible(long *timeout) |
|
{ |
|
might_sleep(); |
|
|
|
freezable_schedule_timeout_interruptible_unsafe(nfs4_update_delay(timeout)); |
|
if (!signal_pending(current)) |
|
return 0; |
|
return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS; |
|
} |
|
|
|
static int nfs4_delay(long *timeout, bool interruptible) |
|
{ |
|
if (interruptible) |
|
return nfs4_delay_interruptible(timeout); |
|
return nfs4_delay_killable(timeout); |
|
} |
|
|
|
static const nfs4_stateid * |
|
nfs4_recoverable_stateid(const nfs4_stateid *stateid) |
|
{ |
|
if (!stateid) |
|
return NULL; |
|
switch (stateid->type) { |
|
case NFS4_OPEN_STATEID_TYPE: |
|
case NFS4_LOCK_STATEID_TYPE: |
|
case NFS4_DELEGATION_STATEID_TYPE: |
|
return stateid; |
|
default: |
|
break; |
|
} |
|
return NULL; |
|
} |
|
|
|
/* This is the error handling routine for processes that are allowed |
|
* to sleep. |
|
*/ |
|
static int nfs4_do_handle_exception(struct nfs_server *server, |
|
int errorcode, struct nfs4_exception *exception) |
|
{ |
|
struct nfs_client *clp = server->nfs_client; |
|
struct nfs4_state *state = exception->state; |
|
const nfs4_stateid *stateid; |
|
struct inode *inode = exception->inode; |
|
int ret = errorcode; |
|
|
|
exception->delay = 0; |
|
exception->recovering = 0; |
|
exception->retry = 0; |
|
|
|
stateid = nfs4_recoverable_stateid(exception->stateid); |
|
if (stateid == NULL && state != NULL) |
|
stateid = nfs4_recoverable_stateid(&state->stateid); |
|
|
|
switch(errorcode) { |
|
case 0: |
|
return 0; |
|
case -NFS4ERR_BADHANDLE: |
|
case -ESTALE: |
|
if (inode != NULL && S_ISREG(inode->i_mode)) |
|
pnfs_destroy_layout(NFS_I(inode)); |
|
break; |
|
case -NFS4ERR_DELEG_REVOKED: |
|
case -NFS4ERR_ADMIN_REVOKED: |
|
case -NFS4ERR_EXPIRED: |
|
case -NFS4ERR_BAD_STATEID: |
|
case -NFS4ERR_PARTNER_NO_AUTH: |
|
if (inode != NULL && stateid != NULL) { |
|
nfs_inode_find_state_and_recover(inode, |
|
stateid); |
|
goto wait_on_recovery; |
|
} |
|
fallthrough; |
|
case -NFS4ERR_OPENMODE: |
|
if (inode) { |
|
int err; |
|
|
|
err = nfs_async_inode_return_delegation(inode, |
|
stateid); |
|
if (err == 0) |
|
goto wait_on_recovery; |
|
if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) { |
|
exception->retry = 1; |
|
break; |
|
} |
|
} |
|
if (state == NULL) |
|
break; |
|
ret = nfs4_schedule_stateid_recovery(server, state); |
|
if (ret < 0) |
|
break; |
|
goto wait_on_recovery; |
|
case -NFS4ERR_STALE_STATEID: |
|
case -NFS4ERR_STALE_CLIENTID: |
|
nfs4_schedule_lease_recovery(clp); |
|
goto wait_on_recovery; |
|
case -NFS4ERR_MOVED: |
|
ret = nfs4_schedule_migration_recovery(server); |
|
if (ret < 0) |
|
break; |
|
goto wait_on_recovery; |
|
case -NFS4ERR_LEASE_MOVED: |
|
nfs4_schedule_lease_moved_recovery(clp); |
|
goto wait_on_recovery; |
|
#if defined(CONFIG_NFS_V4_1) |
|
case -NFS4ERR_BADSESSION: |
|
case -NFS4ERR_BADSLOT: |
|
case -NFS4ERR_BAD_HIGH_SLOT: |
|
case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
|
case -NFS4ERR_DEADSESSION: |
|
case -NFS4ERR_SEQ_FALSE_RETRY: |
|
case -NFS4ERR_SEQ_MISORDERED: |
|
/* Handled in nfs41_sequence_process() */ |
|
goto wait_on_recovery; |
|
#endif /* defined(CONFIG_NFS_V4_1) */ |
|
case -NFS4ERR_FILE_OPEN: |
|
if (exception->timeout > HZ) { |
|
/* We have retried a decent amount, time to |
|
* fail |
|
*/ |
|
ret = -EBUSY; |
|
break; |
|
} |
|
fallthrough; |
|
case -NFS4ERR_DELAY: |
|
nfs_inc_server_stats(server, NFSIOS_DELAY); |
|
fallthrough; |
|
case -NFS4ERR_GRACE: |
|
case -NFS4ERR_LAYOUTTRYLATER: |
|
case -NFS4ERR_RECALLCONFLICT: |
|
exception->delay = 1; |
|
return 0; |
|
|
|
case -NFS4ERR_RETRY_UNCACHED_REP: |
|
case -NFS4ERR_OLD_STATEID: |
|
exception->retry = 1; |
|
break; |
|
case -NFS4ERR_BADOWNER: |
|
/* The following works around a Linux server bug! */ |
|
case -NFS4ERR_BADNAME: |
|
if (server->caps & NFS_CAP_UIDGID_NOMAP) { |
|
server->caps &= ~NFS_CAP_UIDGID_NOMAP; |
|
exception->retry = 1; |
|
printk(KERN_WARNING "NFS: v4 server %s " |
|
"does not accept raw " |
|
"uid/gids. " |
|
"Reenabling the idmapper.\n", |
|
server->nfs_client->cl_hostname); |
|
} |
|
} |
|
/* We failed to handle the error */ |
|
return nfs4_map_errors(ret); |
|
wait_on_recovery: |
|
exception->recovering = 1; |
|
return 0; |
|
} |
|
|
|
/* This is the error handling routine for processes that are allowed |
|
* to sleep. |
|
*/ |
|
int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) |
|
{ |
|
struct nfs_client *clp = server->nfs_client; |
|
int ret; |
|
|
|
ret = nfs4_do_handle_exception(server, errorcode, exception); |
|
if (exception->delay) { |
|
ret = nfs4_delay(&exception->timeout, |
|
exception->interruptible); |
|
goto out_retry; |
|
} |
|
if (exception->recovering) { |
|
if (exception->task_is_privileged) |
|
return -EDEADLOCK; |
|
ret = nfs4_wait_clnt_recover(clp); |
|
if (test_bit(NFS_MIG_FAILED, &server->mig_status)) |
|
return -EIO; |
|
goto out_retry; |
|
} |
|
return ret; |
|
out_retry: |
|
if (ret == 0) |
|
exception->retry = 1; |
|
return ret; |
|
} |
|
|
|
static int |
|
nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server, |
|
int errorcode, struct nfs4_exception *exception) |
|
{ |
|
struct nfs_client *clp = server->nfs_client; |
|
int ret; |
|
|
|
ret = nfs4_do_handle_exception(server, errorcode, exception); |
|
if (exception->delay) { |
|
rpc_delay(task, nfs4_update_delay(&exception->timeout)); |
|
goto out_retry; |
|
} |
|
if (exception->recovering) { |
|
if (exception->task_is_privileged) |
|
return -EDEADLOCK; |
|
rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); |
|
if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) |
|
rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); |
|
goto out_retry; |
|
} |
|
if (test_bit(NFS_MIG_FAILED, &server->mig_status)) |
|
ret = -EIO; |
|
return ret; |
|
out_retry: |
|
if (ret == 0) { |
|
exception->retry = 1; |
|
/* |
|
* For NFS4ERR_MOVED, the client transport will need to |
|
* be recomputed after migration recovery has completed. |
|
*/ |
|
if (errorcode == -NFS4ERR_MOVED) |
|
rpc_task_release_transport(task); |
|
} |
|
return ret; |
|
} |
|
|
|
int |
|
nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server, |
|
struct nfs4_state *state, long *timeout) |
|
{ |
|
struct nfs4_exception exception = { |
|
.state = state, |
|
}; |
|
|
|
if (task->tk_status >= 0) |
|
return 0; |
|
if (timeout) |
|
exception.timeout = *timeout; |
|
task->tk_status = nfs4_async_handle_exception(task, server, |
|
task->tk_status, |
|
&exception); |
|
if (exception.delay && timeout) |
|
*timeout = exception.timeout; |
|
if (exception.retry) |
|
return -EAGAIN; |
|
return 0; |
|
} |
|
|
|
/* |
|
* Return 'true' if 'clp' is using an rpc_client that is integrity protected |
|
* or 'false' otherwise. |
|
*/ |
|
static bool _nfs4_is_integrity_protected(struct nfs_client *clp) |
|
{ |
|
rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; |
|
return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P); |
|
} |
|
|
|
static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) |
|
{ |
|
spin_lock(&clp->cl_lock); |
|
if (time_before(clp->cl_last_renewal,timestamp)) |
|
clp->cl_last_renewal = timestamp; |
|
spin_unlock(&clp->cl_lock); |
|
} |
|
|
|
static void renew_lease(const struct nfs_server *server, unsigned long timestamp) |
|
{ |
|
struct nfs_client *clp = server->nfs_client; |
|
|
|
if (!nfs4_has_session(clp)) |
|
do_renew_lease(clp, timestamp); |
|
} |
|
|
|
struct nfs4_call_sync_data { |
|
const struct nfs_server *seq_server; |
|
struct nfs4_sequence_args *seq_args; |
|
struct nfs4_sequence_res *seq_res; |
|
}; |
|
|
|
void nfs4_init_sequence(struct nfs4_sequence_args *args, |
|
struct nfs4_sequence_res *res, int cache_reply, |
|
int privileged) |
|
{ |
|
args->sa_slot = NULL; |
|
args->sa_cache_this = cache_reply; |
|
args->sa_privileged = privileged; |
|
|
|
res->sr_slot = NULL; |
|
} |
|
|
|
static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res) |
|
{ |
|
struct nfs4_slot *slot = res->sr_slot; |
|
struct nfs4_slot_table *tbl; |
|
|
|
tbl = slot->table; |
|
spin_lock(&tbl->slot_tbl_lock); |
|
if (!nfs41_wake_and_assign_slot(tbl, slot)) |
|
nfs4_free_slot(tbl, slot); |
|
spin_unlock(&tbl->slot_tbl_lock); |
|
|
|
res->sr_slot = NULL; |
|
} |
|
|
|
static int nfs40_sequence_done(struct rpc_task *task, |
|
struct nfs4_sequence_res *res) |
|
{ |
|
if (res->sr_slot != NULL) |
|
nfs40_sequence_free_slot(res); |
|
return 1; |
|
} |
|
|
|
#if defined(CONFIG_NFS_V4_1) |
|
|
|
static void nfs41_release_slot(struct nfs4_slot *slot) |
|
{ |
|
struct nfs4_session *session; |
|
struct nfs4_slot_table *tbl; |
|
bool send_new_highest_used_slotid = false; |
|
|
|
if (!slot) |
|
return; |
|
tbl = slot->table; |
|
session = tbl->session; |
|
|
|
/* Bump the slot sequence number */ |
|
if (slot->seq_done) |
|
slot->seq_nr++; |
|
slot->seq_done = 0; |
|
|
|
spin_lock(&tbl->slot_tbl_lock); |
|
/* Be nice to the server: try to ensure that the last transmitted |
|
* value for highest_user_slotid <= target_highest_slotid |
|
*/ |
|
if (tbl->highest_used_slotid > tbl->target_highest_slotid) |
|
send_new_highest_used_slotid = true; |
|
|
|
if (nfs41_wake_and_assign_slot(tbl, slot)) { |
|
send_new_highest_used_slotid = false; |
|
goto out_unlock; |
|
} |
|
nfs4_free_slot(tbl, slot); |
|
|
|
if (tbl->highest_used_slotid != NFS4_NO_SLOT) |
|
send_new_highest_used_slotid = false; |
|
out_unlock: |
|
spin_unlock(&tbl->slot_tbl_lock); |
|
if (send_new_highest_used_slotid) |
|
nfs41_notify_server(session->clp); |
|
if (waitqueue_active(&tbl->slot_waitq)) |
|
wake_up_all(&tbl->slot_waitq); |
|
} |
|
|
|
static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) |
|
{ |
|
nfs41_release_slot(res->sr_slot); |
|
res->sr_slot = NULL; |
|
} |
|
|
|
static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot, |
|
u32 seqnr) |
|
{ |
|
if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0) |
|
slot->seq_nr_highest_sent = seqnr; |
|
} |
|
static void nfs4_slot_sequence_acked(struct nfs4_slot *slot, |
|
u32 seqnr) |
|
{ |
|
slot->seq_nr_highest_sent = seqnr; |
|
slot->seq_nr_last_acked = seqnr; |
|
} |
|
|
|
static void nfs4_probe_sequence(struct nfs_client *client, const struct cred *cred, |
|
struct nfs4_slot *slot) |
|
{ |
|
struct rpc_task *task = _nfs41_proc_sequence(client, cred, slot, true); |
|
if (!IS_ERR(task)) |
|
rpc_put_task_async(task); |
|
} |
|
|
|
static int nfs41_sequence_process(struct rpc_task *task, |
|
struct nfs4_sequence_res *res) |
|
{ |
|
struct nfs4_session *session; |
|
struct nfs4_slot *slot = res->sr_slot; |
|
struct nfs_client *clp; |
|
int status; |
|
int ret = 1; |
|
|
|
if (slot == NULL) |
|
goto out_noaction; |
|
/* don't increment the sequence number if the task wasn't sent */ |
|
if (!RPC_WAS_SENT(task) || slot->seq_done) |
|
goto out; |
|
|
|
session = slot->table->session; |
|
clp = session->clp; |
|
|
|
trace_nfs4_sequence_done(session, res); |
|
|
|
status = res->sr_status; |
|
if (task->tk_status == -NFS4ERR_DEADSESSION) |
|
status = -NFS4ERR_DEADSESSION; |
|
|
|
/* Check the SEQUENCE operation status */ |
|
switch (status) { |
|
case 0: |
|
/* Mark this sequence number as having been acked */ |
|
nfs4_slot_sequence_acked(slot, slot->seq_nr); |
|
/* Update the slot's sequence and clientid lease timer */ |
|
slot->seq_done = 1; |
|
do_renew_lease(clp, res->sr_timestamp); |
|
/* Check sequence flags */ |
|
nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags, |
|
!!slot->privileged); |
|
nfs41_update_target_slotid(slot->table, slot, res); |
|
break; |
|
case 1: |
|
/* |
|
* sr_status remains 1 if an RPC level error occurred. |
|
* The server may or may not have processed the sequence |
|
* operation.. |
|
*/ |
|
nfs4_slot_sequence_record_sent(slot, slot->seq_nr); |
|
slot->seq_done = 1; |
|
goto out; |
|
case -NFS4ERR_DELAY: |
|
/* The server detected a resend of the RPC call and |
|
* returned NFS4ERR_DELAY as per Section 2.10.6.2 |
|
* of RFC5661. |
|
*/ |
|
dprintk("%s: slot=%u seq=%u: Operation in progress\n", |
|
__func__, |
|
slot->slot_nr, |
|
slot->seq_nr); |
|
nfs4_slot_sequence_acked(slot, slot->seq_nr); |
|
goto out_retry; |
|
case -NFS4ERR_RETRY_UNCACHED_REP: |
|
case -NFS4ERR_SEQ_FALSE_RETRY: |
|
/* |
|
* The server thinks we tried to replay a request. |
|
* Retry the call after bumping the sequence ID. |
|
*/ |
|
nfs4_slot_sequence_acked(slot, slot->seq_nr); |
|
goto retry_new_seq; |
|
case -NFS4ERR_BADSLOT: |
|
/* |
|
* The slot id we used was probably retired. Try again |
|
* using a different slot id. |
|
*/ |
|
if (slot->slot_nr < slot->table->target_highest_slotid) |
|
goto session_recover; |
|
goto retry_nowait; |
|
case -NFS4ERR_SEQ_MISORDERED: |
|
nfs4_slot_sequence_record_sent(slot, slot->seq_nr); |
|
/* |
|
* Were one or more calls using this slot interrupted? |
|
* If the server never received the request, then our |
|
* transmitted slot sequence number may be too high. However, |
|
* if the server did receive the request then it might |
|
* accidentally give us a reply with a mismatched operation. |
|
* We can sort this out by sending a lone sequence operation |
|
* to the server on the same slot. |
|
*/ |
|
if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) { |
|
slot->seq_nr--; |
|
if (task->tk_msg.rpc_proc != &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE]) { |
|
nfs4_probe_sequence(clp, task->tk_msg.rpc_cred, slot); |
|
res->sr_slot = NULL; |
|
} |
|
goto retry_nowait; |
|
} |
|
/* |
|
* RFC5661: |
|
* A retry might be sent while the original request is |
|
* still in progress on the replier. The replier SHOULD |
|
* deal with the issue by returning NFS4ERR_DELAY as the |
|
* reply to SEQUENCE or CB_SEQUENCE operation, but |
|
* implementations MAY return NFS4ERR_SEQ_MISORDERED. |
|
* |
|
* Restart the search after a delay. |
|
*/ |
|
slot->seq_nr = slot->seq_nr_highest_sent; |
|
goto out_retry; |
|
case -NFS4ERR_BADSESSION: |
|
case -NFS4ERR_DEADSESSION: |
|
case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
|
goto session_recover; |
|
default: |
|
/* Just update the slot sequence no. */ |
|
slot->seq_done = 1; |
|
} |
|
out: |
|
/* The session may be reset by one of the error handlers. */ |
|
dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); |
|
out_noaction: |
|
return ret; |
|
session_recover: |
|
nfs4_schedule_session_recovery(session, status); |
|
dprintk("%s ERROR: %d Reset session\n", __func__, status); |
|
nfs41_sequence_free_slot(res); |
|
goto out; |
|
retry_new_seq: |
|
++slot->seq_nr; |
|
retry_nowait: |
|
if (rpc_restart_call_prepare(task)) { |
|
nfs41_sequence_free_slot(res); |
|
task->tk_status = 0; |
|
ret = 0; |
|
} |
|
goto out; |
|
out_retry: |
|
if (!rpc_restart_call(task)) |
|
goto out; |
|
rpc_delay(task, NFS4_POLL_RETRY_MAX); |
|
return 0; |
|
} |
|
|
|
int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) |
|
{ |
|
if (!nfs41_sequence_process(task, res)) |
|
return 0; |
|
if (res->sr_slot != NULL) |
|
nfs41_sequence_free_slot(res); |
|
return 1; |
|
|
|
} |
|
EXPORT_SYMBOL_GPL(nfs41_sequence_done); |
|
|
|
static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) |
|
{ |
|
if (res->sr_slot == NULL) |
|
return 1; |
|
if (res->sr_slot->table->session != NULL) |
|
return nfs41_sequence_process(task, res); |
|
return nfs40_sequence_done(task, res); |
|
} |
|
|
|
static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) |
|
{ |
|
if (res->sr_slot != NULL) { |
|
if (res->sr_slot->table->session != NULL) |
|
nfs41_sequence_free_slot(res); |
|
else |
|
nfs40_sequence_free_slot(res); |
|
} |
|
} |
|
|
|
int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) |
|
{ |
|
if (res->sr_slot == NULL) |
|
return 1; |
|
if (!res->sr_slot->table->session) |
|
return nfs40_sequence_done(task, res); |
|
return nfs41_sequence_done(task, res); |
|
} |
|
EXPORT_SYMBOL_GPL(nfs4_sequence_done); |
|
|
|
static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_call_sync_data *data = calldata; |
|
|
|
dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); |
|
|
|
nfs4_setup_sequence(data->seq_server->nfs_client, |
|
data->seq_args, data->seq_res, task); |
|
} |
|
|
|
static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_call_sync_data *data = calldata; |
|
|
|
nfs41_sequence_done(task, data->seq_res); |
|
} |
|
|
|
static const struct rpc_call_ops nfs41_call_sync_ops = { |
|
.rpc_call_prepare = nfs41_call_sync_prepare, |
|
.rpc_call_done = nfs41_call_sync_done, |
|
}; |
|
|
|
#else /* !CONFIG_NFS_V4_1 */ |
|
|
|
static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) |
|
{ |
|
return nfs40_sequence_done(task, res); |
|
} |
|
|
|
static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) |
|
{ |
|
if (res->sr_slot != NULL) |
|
nfs40_sequence_free_slot(res); |
|
} |
|
|
|
int nfs4_sequence_done(struct rpc_task *task, |
|
struct nfs4_sequence_res *res) |
|
{ |
|
return nfs40_sequence_done(task, res); |
|
} |
|
EXPORT_SYMBOL_GPL(nfs4_sequence_done); |
|
|
|
#endif /* !CONFIG_NFS_V4_1 */ |
|
|
|
static void nfs41_sequence_res_init(struct nfs4_sequence_res *res) |
|
{ |
|
res->sr_timestamp = jiffies; |
|
res->sr_status_flags = 0; |
|
res->sr_status = 1; |
|
} |
|
|
|
static |
|
void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args, |
|
struct nfs4_sequence_res *res, |
|
struct nfs4_slot *slot) |
|
{ |
|
if (!slot) |
|
return; |
|
slot->privileged = args->sa_privileged ? 1 : 0; |
|
args->sa_slot = slot; |
|
|
|
res->sr_slot = slot; |
|
} |
|
|
|
int nfs4_setup_sequence(struct nfs_client *client, |
|
struct nfs4_sequence_args *args, |
|
struct nfs4_sequence_res *res, |
|
struct rpc_task *task) |
|
{ |
|
struct nfs4_session *session = nfs4_get_session(client); |
|
struct nfs4_slot_table *tbl = client->cl_slot_tbl; |
|
struct nfs4_slot *slot; |
|
|
|
/* slot already allocated? */ |
|
if (res->sr_slot != NULL) |
|
goto out_start; |
|
|
|
if (session) |
|
tbl = &session->fc_slot_table; |
|
|
|
spin_lock(&tbl->slot_tbl_lock); |
|
/* The state manager will wait until the slot table is empty */ |
|
if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) |
|
goto out_sleep; |
|
|
|
slot = nfs4_alloc_slot(tbl); |
|
if (IS_ERR(slot)) { |
|
if (slot == ERR_PTR(-ENOMEM)) |
|
goto out_sleep_timeout; |
|
goto out_sleep; |
|
} |
|
spin_unlock(&tbl->slot_tbl_lock); |
|
|
|
nfs4_sequence_attach_slot(args, res, slot); |
|
|
|
trace_nfs4_setup_sequence(session, args); |
|
out_start: |
|
nfs41_sequence_res_init(res); |
|
rpc_call_start(task); |
|
return 0; |
|
out_sleep_timeout: |
|
/* Try again in 1/4 second */ |
|
if (args->sa_privileged) |
|
rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task, |
|
jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED); |
|
else |
|
rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task, |
|
NULL, jiffies + (HZ >> 2)); |
|
spin_unlock(&tbl->slot_tbl_lock); |
|
return -EAGAIN; |
|
out_sleep: |
|
if (args->sa_privileged) |
|
rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, |
|
RPC_PRIORITY_PRIVILEGED); |
|
else |
|
rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); |
|
spin_unlock(&tbl->slot_tbl_lock); |
|
return -EAGAIN; |
|
} |
|
EXPORT_SYMBOL_GPL(nfs4_setup_sequence); |
|
|
|
static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_call_sync_data *data = calldata; |
|
nfs4_setup_sequence(data->seq_server->nfs_client, |
|
data->seq_args, data->seq_res, task); |
|
} |
|
|
|
static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_call_sync_data *data = calldata; |
|
nfs4_sequence_done(task, data->seq_res); |
|
} |
|
|
|
static const struct rpc_call_ops nfs40_call_sync_ops = { |
|
.rpc_call_prepare = nfs40_call_sync_prepare, |
|
.rpc_call_done = nfs40_call_sync_done, |
|
}; |
|
|
|
static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup) |
|
{ |
|
int ret; |
|
struct rpc_task *task; |
|
|
|
task = rpc_run_task(task_setup); |
|
if (IS_ERR(task)) |
|
return PTR_ERR(task); |
|
|
|
ret = task->tk_status; |
|
rpc_put_task(task); |
|
return ret; |
|
} |
|
|
|
static int nfs4_do_call_sync(struct rpc_clnt *clnt, |
|
struct nfs_server *server, |
|
struct rpc_message *msg, |
|
struct nfs4_sequence_args *args, |
|
struct nfs4_sequence_res *res, |
|
unsigned short task_flags) |
|
{ |
|
struct nfs_client *clp = server->nfs_client; |
|
struct nfs4_call_sync_data data = { |
|
.seq_server = server, |
|
.seq_args = args, |
|
.seq_res = res, |
|
}; |
|
struct rpc_task_setup task_setup = { |
|
.rpc_client = clnt, |
|
.rpc_message = msg, |
|
.callback_ops = clp->cl_mvops->call_sync_ops, |
|
.callback_data = &data, |
|
.flags = task_flags, |
|
}; |
|
|
|
return nfs4_call_sync_custom(&task_setup); |
|
} |
|
|
|
static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, |
|
struct nfs_server *server, |
|
struct rpc_message *msg, |
|
struct nfs4_sequence_args *args, |
|
struct nfs4_sequence_res *res) |
|
{ |
|
return nfs4_do_call_sync(clnt, server, msg, args, res, 0); |
|
} |
|
|
|
|
|
int nfs4_call_sync(struct rpc_clnt *clnt, |
|
struct nfs_server *server, |
|
struct rpc_message *msg, |
|
struct nfs4_sequence_args *args, |
|
struct nfs4_sequence_res *res, |
|
int cache_reply) |
|
{ |
|
nfs4_init_sequence(args, res, cache_reply, 0); |
|
return nfs4_call_sync_sequence(clnt, server, msg, args, res); |
|
} |
|
|
|
static void |
|
nfs4_inc_nlink_locked(struct inode *inode) |
|
{ |
|
NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER; |
|
inc_nlink(inode); |
|
} |
|
|
|
static void |
|
nfs4_dec_nlink_locked(struct inode *inode) |
|
{ |
|
NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER; |
|
drop_nlink(inode); |
|
} |
|
|
|
static void |
|
nfs4_update_changeattr_locked(struct inode *inode, |
|
struct nfs4_change_info *cinfo, |
|
unsigned long timestamp, unsigned long cache_validity) |
|
{ |
|
struct nfs_inode *nfsi = NFS_I(inode); |
|
|
|
nfsi->cache_validity |= NFS_INO_INVALID_CTIME |
|
| NFS_INO_INVALID_MTIME |
|
| cache_validity; |
|
|
|
if (cinfo->atomic && cinfo->before == inode_peek_iversion_raw(inode)) { |
|
nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE; |
|
nfsi->attrtimeo_timestamp = jiffies; |
|
} else { |
|
if (S_ISDIR(inode->i_mode)) { |
|
nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
|
nfs_force_lookup_revalidate(inode); |
|
} else { |
|
if (!NFS_PROTO(inode)->have_delegation(inode, |
|
FMODE_READ)) |
|
nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE; |
|
} |
|
|
|
if (cinfo->before != inode_peek_iversion_raw(inode)) |
|
nfsi->cache_validity |= NFS_INO_INVALID_ACCESS | |
|
NFS_INO_INVALID_ACL | |
|
NFS_INO_INVALID_XATTR; |
|
} |
|
inode_set_iversion_raw(inode, cinfo->after); |
|
nfsi->read_cache_jiffies = timestamp; |
|
nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
|
nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE; |
|
|
|
if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
|
nfs_fscache_invalidate(inode); |
|
} |
|
|
|
void |
|
nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, |
|
unsigned long timestamp, unsigned long cache_validity) |
|
{ |
|
spin_lock(&dir->i_lock); |
|
nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity); |
|
spin_unlock(&dir->i_lock); |
|
} |
|
|
|
struct nfs4_open_createattrs { |
|
struct nfs4_label *label; |
|
struct iattr *sattr; |
|
const __u32 verf[2]; |
|
}; |
|
|
|
static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, |
|
int err, struct nfs4_exception *exception) |
|
{ |
|
if (err != -EINVAL) |
|
return false; |
|
if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) |
|
return false; |
|
server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; |
|
exception->retry = 1; |
|
return true; |
|
} |
|
|
|
static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx) |
|
{ |
|
return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); |
|
} |
|
|
|
static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx) |
|
{ |
|
fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE); |
|
|
|
return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret; |
|
} |
|
|
|
static u32 |
|
nfs4_map_atomic_open_share(struct nfs_server *server, |
|
fmode_t fmode, int openflags) |
|
{ |
|
u32 res = 0; |
|
|
|
switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
|
case FMODE_READ: |
|
res = NFS4_SHARE_ACCESS_READ; |
|
break; |
|
case FMODE_WRITE: |
|
res = NFS4_SHARE_ACCESS_WRITE; |
|
break; |
|
case FMODE_READ|FMODE_WRITE: |
|
res = NFS4_SHARE_ACCESS_BOTH; |
|
} |
|
if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) |
|
goto out; |
|
/* Want no delegation if we're using O_DIRECT */ |
|
if (openflags & O_DIRECT) |
|
res |= NFS4_SHARE_WANT_NO_DELEG; |
|
out: |
|
return res; |
|
} |
|
|
|
static enum open_claim_type4 |
|
nfs4_map_atomic_open_claim(struct nfs_server *server, |
|
enum open_claim_type4 claim) |
|
{ |
|
if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) |
|
return claim; |
|
switch (claim) { |
|
default: |
|
return claim; |
|
case NFS4_OPEN_CLAIM_FH: |
|
return NFS4_OPEN_CLAIM_NULL; |
|
case NFS4_OPEN_CLAIM_DELEG_CUR_FH: |
|
return NFS4_OPEN_CLAIM_DELEGATE_CUR; |
|
case NFS4_OPEN_CLAIM_DELEG_PREV_FH: |
|
return NFS4_OPEN_CLAIM_DELEGATE_PREV; |
|
} |
|
} |
|
|
|
static void nfs4_init_opendata_res(struct nfs4_opendata *p) |
|
{ |
|
p->o_res.f_attr = &p->f_attr; |
|
p->o_res.f_label = p->f_label; |
|
p->o_res.seqid = p->o_arg.seqid; |
|
p->c_res.seqid = p->c_arg.seqid; |
|
p->o_res.server = p->o_arg.server; |
|
p->o_res.access_request = p->o_arg.access; |
|
nfs_fattr_init(&p->f_attr); |
|
nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); |
|
} |
|
|
|
static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, |
|
struct nfs4_state_owner *sp, fmode_t fmode, int flags, |
|
const struct nfs4_open_createattrs *c, |
|
enum open_claim_type4 claim, |
|
gfp_t gfp_mask) |
|
{ |
|
struct dentry *parent = dget_parent(dentry); |
|
struct inode *dir = d_inode(parent); |
|
struct nfs_server *server = NFS_SERVER(dir); |
|
struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); |
|
struct nfs4_label *label = (c != NULL) ? c->label : NULL; |
|
struct nfs4_opendata *p; |
|
|
|
p = kzalloc(sizeof(*p), gfp_mask); |
|
if (p == NULL) |
|
goto err; |
|
|
|
p->f_label = nfs4_label_alloc(server, gfp_mask); |
|
if (IS_ERR(p->f_label)) |
|
goto err_free_p; |
|
|
|
p->a_label = nfs4_label_alloc(server, gfp_mask); |
|
if (IS_ERR(p->a_label)) |
|
goto err_free_f; |
|
|
|
alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; |
|
p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); |
|
if (IS_ERR(p->o_arg.seqid)) |
|
goto err_free_label; |
|
nfs_sb_active(dentry->d_sb); |
|
p->dentry = dget(dentry); |
|
p->dir = parent; |
|
p->owner = sp; |
|
atomic_inc(&sp->so_count); |
|
p->o_arg.open_flags = flags; |
|
p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); |
|
p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); |
|
p->o_arg.share_access = nfs4_map_atomic_open_share(server, |
|
fmode, flags); |
|
if (flags & O_CREAT) { |
|
p->o_arg.umask = current_umask(); |
|
p->o_arg.label = nfs4_label_copy(p->a_label, label); |
|
if (c->sattr != NULL && c->sattr->ia_valid != 0) { |
|
p->o_arg.u.attrs = &p->attrs; |
|
memcpy(&p->attrs, c->sattr, sizeof(p->attrs)); |
|
|
|
memcpy(p->o_arg.u.verifier.data, c->verf, |
|
sizeof(p->o_arg.u.verifier.data)); |
|
} |
|
} |
|
/* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS |
|
* will return permission denied for all bits until close */ |
|
if (!(flags & O_EXCL)) { |
|
/* ask server to check for all possible rights as results |
|
* are cached */ |
|
switch (p->o_arg.claim) { |
|
default: |
|
break; |
|
case NFS4_OPEN_CLAIM_NULL: |
|
case NFS4_OPEN_CLAIM_FH: |
|
p->o_arg.access = NFS4_ACCESS_READ | |
|
NFS4_ACCESS_MODIFY | |
|
NFS4_ACCESS_EXTEND | |
|
NFS4_ACCESS_EXECUTE; |
|
#ifdef CONFIG_NFS_V4_2 |
|
if (server->caps & NFS_CAP_XATTR) |
|
p->o_arg.access |= NFS4_ACCESS_XAREAD | |
|
NFS4_ACCESS_XAWRITE | |
|
NFS4_ACCESS_XALIST; |
|
#endif |
|
} |
|
} |
|
p->o_arg.clientid = server->nfs_client->cl_clientid; |
|
p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); |
|
p->o_arg.id.uniquifier = sp->so_seqid.owner_id; |
|
p->o_arg.name = &dentry->d_name; |
|
p->o_arg.server = server; |
|
p->o_arg.bitmask = nfs4_bitmask(server, label); |
|
p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; |
|
switch (p->o_arg.claim) { |
|
case NFS4_OPEN_CLAIM_NULL: |
|
case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
|
case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
|
p->o_arg.fh = NFS_FH(dir); |
|
break; |
|
case NFS4_OPEN_CLAIM_PREVIOUS: |
|
case NFS4_OPEN_CLAIM_FH: |
|
case NFS4_OPEN_CLAIM_DELEG_CUR_FH: |
|
case NFS4_OPEN_CLAIM_DELEG_PREV_FH: |
|
p->o_arg.fh = NFS_FH(d_inode(dentry)); |
|
} |
|
p->c_arg.fh = &p->o_res.fh; |
|
p->c_arg.stateid = &p->o_res.stateid; |
|
p->c_arg.seqid = p->o_arg.seqid; |
|
nfs4_init_opendata_res(p); |
|
kref_init(&p->kref); |
|
return p; |
|
|
|
err_free_label: |
|
nfs4_label_free(p->a_label); |
|
err_free_f: |
|
nfs4_label_free(p->f_label); |
|
err_free_p: |
|
kfree(p); |
|
err: |
|
dput(parent); |
|
return NULL; |
|
} |
|
|
|
static void nfs4_opendata_free(struct kref *kref) |
|
{ |
|
struct nfs4_opendata *p = container_of(kref, |
|
struct nfs4_opendata, kref); |
|
struct super_block *sb = p->dentry->d_sb; |
|
|
|
nfs4_lgopen_release(p->lgp); |
|
nfs_free_seqid(p->o_arg.seqid); |
|
nfs4_sequence_free_slot(&p->o_res.seq_res); |
|
if (p->state != NULL) |
|
nfs4_put_open_state(p->state); |
|
nfs4_put_state_owner(p->owner); |
|
|
|
nfs4_label_free(p->a_label); |
|
nfs4_label_free(p->f_label); |
|
|
|
dput(p->dir); |
|
dput(p->dentry); |
|
nfs_sb_deactive(sb); |
|
nfs_fattr_free_names(&p->f_attr); |
|
kfree(p->f_attr.mdsthreshold); |
|
kfree(p); |
|
} |
|
|
|
static void nfs4_opendata_put(struct nfs4_opendata *p) |
|
{ |
|
if (p != NULL) |
|
kref_put(&p->kref, nfs4_opendata_free); |
|
} |
|
|
|
static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, |
|
fmode_t fmode) |
|
{ |
|
switch(fmode & (FMODE_READ|FMODE_WRITE)) { |
|
case FMODE_READ|FMODE_WRITE: |
|
return state->n_rdwr != 0; |
|
case FMODE_WRITE: |
|
return state->n_wronly != 0; |
|
case FMODE_READ: |
|
return state->n_rdonly != 0; |
|
} |
|
WARN_ON_ONCE(1); |
|
return false; |
|
} |
|
|
|
static int can_open_cached(struct nfs4_state *state, fmode_t mode, |
|
int open_mode, enum open_claim_type4 claim) |
|
{ |
|
int ret = 0; |
|
|
|
if (open_mode & (O_EXCL|O_TRUNC)) |
|
goto out; |
|
switch (claim) { |
|
case NFS4_OPEN_CLAIM_NULL: |
|
case NFS4_OPEN_CLAIM_FH: |
|
goto out; |
|
default: |
|
break; |
|
} |
|
switch (mode & (FMODE_READ|FMODE_WRITE)) { |
|
case FMODE_READ: |
|
ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 |
|
&& state->n_rdonly != 0; |
|
break; |
|
case FMODE_WRITE: |
|
ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 |
|
&& state->n_wronly != 0; |
|
break; |
|
case FMODE_READ|FMODE_WRITE: |
|
ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 |
|
&& state->n_rdwr != 0; |
|
} |
|
out: |
|
return ret; |
|
} |
|
|
|
static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, |
|
enum open_claim_type4 claim) |
|
{ |
|
if (delegation == NULL) |
|
return 0; |
|
if ((delegation->type & fmode) != fmode) |
|
return 0; |
|
switch (claim) { |
|
case NFS4_OPEN_CLAIM_NULL: |
|
case NFS4_OPEN_CLAIM_FH: |
|
break; |
|
case NFS4_OPEN_CLAIM_PREVIOUS: |
|
if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) |
|
break; |
|
fallthrough; |
|
default: |
|
return 0; |
|
} |
|
nfs_mark_delegation_referenced(delegation); |
|
return 1; |
|
} |
|
|
|
static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) |
|
{ |
|
switch (fmode) { |
|
case FMODE_WRITE: |
|
state->n_wronly++; |
|
break; |
|
case FMODE_READ: |
|
state->n_rdonly++; |
|
break; |
|
case FMODE_READ|FMODE_WRITE: |
|
state->n_rdwr++; |
|
} |
|
nfs4_state_set_mode_locked(state, state->state | fmode); |
|
} |
|
|
|
#ifdef CONFIG_NFS_V4_1 |
|
static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) |
|
{ |
|
if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) |
|
return true; |
|
if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) |
|
return true; |
|
if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) |
|
return true; |
|
return false; |
|
} |
|
#endif /* CONFIG_NFS_V4_1 */ |
|
|
|
static void nfs_state_log_update_open_stateid(struct nfs4_state *state) |
|
{ |
|
if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) |
|
wake_up_all(&state->waitq); |
|
} |
|
|
|
static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) |
|
{ |
|
struct nfs_client *clp = state->owner->so_server->nfs_client; |
|
bool need_recover = false; |
|
|
|
if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) |
|
need_recover = true; |
|
if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) |
|
need_recover = true; |
|
if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) |
|
need_recover = true; |
|
if (need_recover) |
|
nfs4_state_mark_reclaim_nograce(clp, state); |
|
} |
|
|
|
/* |
|
* Check for whether or not the caller may update the open stateid |
|
* to the value passed in by stateid. |
|
* |
|
* Note: This function relies heavily on the server implementing |
|
* RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2 |
|
* correctly. |
|
* i.e. The stateid seqids have to be initialised to 1, and |
|
* are then incremented on every state transition. |
|
*/ |
|
static bool nfs_stateid_is_sequential(struct nfs4_state *state, |
|
const nfs4_stateid *stateid) |
|
{ |
|
if (test_bit(NFS_OPEN_STATE, &state->flags)) { |
|
/* The common case - we're updating to a new sequence number */ |
|
if (nfs4_stateid_match_other(stateid, &state->open_stateid) && |
|
nfs4_stateid_is_next(&state->open_stateid, stateid)) { |
|
return true; |
|
} |
|
} else { |
|
/* This is the first OPEN in this generation */ |
|
if (stateid->seqid == cpu_to_be32(1)) |
|
return true; |
|
} |
|
return false; |
|
} |
|
|
|
static void nfs_resync_open_stateid_locked(struct nfs4_state *state) |
|
{ |
|
if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) |
|
return; |
|
if (state->n_wronly) |
|
set_bit(NFS_O_WRONLY_STATE, &state->flags); |
|
if (state->n_rdonly) |
|
set_bit(NFS_O_RDONLY_STATE, &state->flags); |
|
if (state->n_rdwr) |
|
set_bit(NFS_O_RDWR_STATE, &state->flags); |
|
set_bit(NFS_OPEN_STATE, &state->flags); |
|
} |
|
|
|
static void nfs_clear_open_stateid_locked(struct nfs4_state *state, |
|
nfs4_stateid *stateid, fmode_t fmode) |
|
{ |
|
clear_bit(NFS_O_RDWR_STATE, &state->flags); |
|
switch (fmode & (FMODE_READ|FMODE_WRITE)) { |
|
case FMODE_WRITE: |
|
clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
|
break; |
|
case FMODE_READ: |
|
clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
|
break; |
|
case 0: |
|
clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
|
clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
|
clear_bit(NFS_OPEN_STATE, &state->flags); |
|
} |
|
if (stateid == NULL) |
|
return; |
|
/* Handle OPEN+OPEN_DOWNGRADE races */ |
|
if (nfs4_stateid_match_other(stateid, &state->open_stateid) && |
|
!nfs4_stateid_is_newer(stateid, &state->open_stateid)) { |
|
nfs_resync_open_stateid_locked(state); |
|
goto out; |
|
} |
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
|
nfs4_stateid_copy(&state->stateid, stateid); |
|
nfs4_stateid_copy(&state->open_stateid, stateid); |
|
trace_nfs4_open_stateid_update(state->inode, stateid, 0); |
|
out: |
|
nfs_state_log_update_open_stateid(state); |
|
} |
|
|
|
static void nfs_clear_open_stateid(struct nfs4_state *state, |
|
nfs4_stateid *arg_stateid, |
|
nfs4_stateid *stateid, fmode_t fmode) |
|
{ |
|
write_seqlock(&state->seqlock); |
|
/* Ignore, if the CLOSE argment doesn't match the current stateid */ |
|
if (nfs4_state_match_open_stateid_other(state, arg_stateid)) |
|
nfs_clear_open_stateid_locked(state, stateid, fmode); |
|
write_sequnlock(&state->seqlock); |
|
if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) |
|
nfs4_schedule_state_manager(state->owner->so_server->nfs_client); |
|
} |
|
|
|
static void nfs_set_open_stateid_locked(struct nfs4_state *state, |
|
const nfs4_stateid *stateid, nfs4_stateid *freeme) |
|
__must_hold(&state->owner->so_lock) |
|
__must_hold(&state->seqlock) |
|
__must_hold(RCU) |
|
|
|
{ |
|
DEFINE_WAIT(wait); |
|
int status = 0; |
|
for (;;) { |
|
|
|
if (nfs_stateid_is_sequential(state, stateid)) |
|
break; |
|
|
|
if (status) |
|
break; |
|
/* Rely on seqids for serialisation with NFSv4.0 */ |
|
if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client)) |
|
break; |
|
|
|
set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); |
|
prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); |
|
/* |
|
* Ensure we process the state changes in the same order |
|
* in which the server processed them by delaying the |
|
* update of the stateid until we are in sequence. |
|
*/ |
|
write_sequnlock(&state->seqlock); |
|
spin_unlock(&state->owner->so_lock); |
|
rcu_read_unlock(); |
|
trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0); |
|
|
|
if (!fatal_signal_pending(current)) { |
|
if (schedule_timeout(5*HZ) == 0) |
|
status = -EAGAIN; |
|
else |
|
status = 0; |
|
} else |
|
status = -EINTR; |
|
finish_wait(&state->waitq, &wait); |
|
rcu_read_lock(); |
|
spin_lock(&state->owner->so_lock); |
|
write_seqlock(&state->seqlock); |
|
} |
|
|
|
if (test_bit(NFS_OPEN_STATE, &state->flags) && |
|
!nfs4_stateid_match_other(stateid, &state->open_stateid)) { |
|
nfs4_stateid_copy(freeme, &state->open_stateid); |
|
nfs_test_and_clear_all_open_stateid(state); |
|
} |
|
|
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
|
nfs4_stateid_copy(&state->stateid, stateid); |
|
nfs4_stateid_copy(&state->open_stateid, stateid); |
|
trace_nfs4_open_stateid_update(state->inode, stateid, status); |
|
nfs_state_log_update_open_stateid(state); |
|
} |
|
|
|
static void nfs_state_set_open_stateid(struct nfs4_state *state, |
|
const nfs4_stateid *open_stateid, |
|
fmode_t fmode, |
|
nfs4_stateid *freeme) |
|
{ |
|
/* |
|
* Protect the call to nfs4_state_set_mode_locked and |
|
* serialise the stateid update |
|
*/ |
|
write_seqlock(&state->seqlock); |
|
nfs_set_open_stateid_locked(state, open_stateid, freeme); |
|
switch (fmode) { |
|
case FMODE_READ: |
|
set_bit(NFS_O_RDONLY_STATE, &state->flags); |
|
break; |
|
case FMODE_WRITE: |
|
set_bit(NFS_O_WRONLY_STATE, &state->flags); |
|
break; |
|
case FMODE_READ|FMODE_WRITE: |
|
set_bit(NFS_O_RDWR_STATE, &state->flags); |
|
} |
|
set_bit(NFS_OPEN_STATE, &state->flags); |
|
write_sequnlock(&state->seqlock); |
|
} |
|
|
|
static void nfs_state_clear_open_state_flags(struct nfs4_state *state) |
|
{ |
|
clear_bit(NFS_O_RDWR_STATE, &state->flags); |
|
clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
|
clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
|
clear_bit(NFS_OPEN_STATE, &state->flags); |
|
} |
|
|
|
static void nfs_state_set_delegation(struct nfs4_state *state, |
|
const nfs4_stateid *deleg_stateid, |
|
fmode_t fmode) |
|
{ |
|
/* |
|
* Protect the call to nfs4_state_set_mode_locked and |
|
* serialise the stateid update |
|
*/ |
|
write_seqlock(&state->seqlock); |
|
nfs4_stateid_copy(&state->stateid, deleg_stateid); |
|
set_bit(NFS_DELEGATED_STATE, &state->flags); |
|
write_sequnlock(&state->seqlock); |
|
} |
|
|
|
static void nfs_state_clear_delegation(struct nfs4_state *state) |
|
{ |
|
write_seqlock(&state->seqlock); |
|
nfs4_stateid_copy(&state->stateid, &state->open_stateid); |
|
clear_bit(NFS_DELEGATED_STATE, &state->flags); |
|
write_sequnlock(&state->seqlock); |
|
} |
|
|
|
int update_open_stateid(struct nfs4_state *state, |
|
const nfs4_stateid *open_stateid, |
|
const nfs4_stateid *delegation, |
|
fmode_t fmode) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(state->inode); |
|
struct nfs_client *clp = server->nfs_client; |
|
struct nfs_inode *nfsi = NFS_I(state->inode); |
|
struct nfs_delegation *deleg_cur; |
|
nfs4_stateid freeme = { }; |
|
int ret = 0; |
|
|
|
fmode &= (FMODE_READ|FMODE_WRITE); |
|
|
|
rcu_read_lock(); |
|
spin_lock(&state->owner->so_lock); |
|
if (open_stateid != NULL) { |
|
nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme); |
|
ret = 1; |
|
} |
|
|
|
deleg_cur = nfs4_get_valid_delegation(state->inode); |
|
if (deleg_cur == NULL) |
|
goto no_delegation; |
|
|
|
spin_lock(&deleg_cur->lock); |
|
if (rcu_dereference(nfsi->delegation) != deleg_cur || |
|
test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || |
|
(deleg_cur->type & fmode) != fmode) |
|
goto no_delegation_unlock; |
|
|
|
if (delegation == NULL) |
|
delegation = &deleg_cur->stateid; |
|
else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation)) |
|
goto no_delegation_unlock; |
|
|
|
nfs_mark_delegation_referenced(deleg_cur); |
|
nfs_state_set_delegation(state, &deleg_cur->stateid, fmode); |
|
ret = 1; |
|
no_delegation_unlock: |
|
spin_unlock(&deleg_cur->lock); |
|
no_delegation: |
|
if (ret) |
|
update_open_stateflags(state, fmode); |
|
spin_unlock(&state->owner->so_lock); |
|
rcu_read_unlock(); |
|
|
|
if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) |
|
nfs4_schedule_state_manager(clp); |
|
if (freeme.type != 0) |
|
nfs4_test_and_free_stateid(server, &freeme, |
|
state->owner->so_cred); |
|
|
|
return ret; |
|
} |
|
|
|
static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, |
|
const nfs4_stateid *stateid) |
|
{ |
|
struct nfs4_state *state = lsp->ls_state; |
|
bool ret = false; |
|
|
|
spin_lock(&state->state_lock); |
|
if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) |
|
goto out_noupdate; |
|
if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) |
|
goto out_noupdate; |
|
nfs4_stateid_copy(&lsp->ls_stateid, stateid); |
|
ret = true; |
|
out_noupdate: |
|
spin_unlock(&state->state_lock); |
|
return ret; |
|
} |
|
|
|
static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) |
|
{ |
|
struct nfs_delegation *delegation; |
|
|
|
fmode &= FMODE_READ|FMODE_WRITE; |
|
rcu_read_lock(); |
|
delegation = nfs4_get_valid_delegation(inode); |
|
if (delegation == NULL || (delegation->type & fmode) == fmode) { |
|
rcu_read_unlock(); |
|
return; |
|
} |
|
rcu_read_unlock(); |
|
nfs4_inode_return_delegation(inode); |
|
} |
|
|
|
static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) |
|
{ |
|
struct nfs4_state *state = opendata->state; |
|
struct nfs_delegation *delegation; |
|
int open_mode = opendata->o_arg.open_flags; |
|
fmode_t fmode = opendata->o_arg.fmode; |
|
enum open_claim_type4 claim = opendata->o_arg.claim; |
|
nfs4_stateid stateid; |
|
int ret = -EAGAIN; |
|
|
|
for (;;) { |
|
spin_lock(&state->owner->so_lock); |
|
if (can_open_cached(state, fmode, open_mode, claim)) { |
|
update_open_stateflags(state, fmode); |
|
spin_unlock(&state->owner->so_lock); |
|
goto out_return_state; |
|
} |
|
spin_unlock(&state->owner->so_lock); |
|
rcu_read_lock(); |
|
delegation = nfs4_get_valid_delegation(state->inode); |
|
if (!can_open_delegated(delegation, fmode, claim)) { |
|
rcu_read_unlock(); |
|
break; |
|
} |
|
/* Save the delegation */ |
|
nfs4_stateid_copy(&stateid, &delegation->stateid); |
|
rcu_read_unlock(); |
|
nfs_release_seqid(opendata->o_arg.seqid); |
|
if (!opendata->is_recover) { |
|
ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); |
|
if (ret != 0) |
|
goto out; |
|
} |
|
ret = -EAGAIN; |
|
|
|
/* Try to update the stateid using the delegation */ |
|
if (update_open_stateid(state, NULL, &stateid, fmode)) |
|
goto out_return_state; |
|
} |
|
out: |
|
return ERR_PTR(ret); |
|
out_return_state: |
|
refcount_inc(&state->count); |
|
return state; |
|
} |
|
|
|
static void |
|
nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) |
|
{ |
|
struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; |
|
struct nfs_delegation *delegation; |
|
int delegation_flags = 0; |
|
|
|
rcu_read_lock(); |
|
delegation = rcu_dereference(NFS_I(state->inode)->delegation); |
|
if (delegation) |
|
delegation_flags = delegation->flags; |
|
rcu_read_unlock(); |
|
switch (data->o_arg.claim) { |
|
default: |
|
break; |
|
case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
|
case NFS4_OPEN_CLAIM_DELEG_CUR_FH: |
|
pr_err_ratelimited("NFS: Broken NFSv4 server %s is " |
|
"returning a delegation for " |
|
"OPEN(CLAIM_DELEGATE_CUR)\n", |
|
clp->cl_hostname); |
|
return; |
|
} |
|
if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) |
|
nfs_inode_set_delegation(state->inode, |
|
data->owner->so_cred, |
|
data->o_res.delegation_type, |
|
&data->o_res.delegation, |
|
data->o_res.pagemod_limit); |
|
else |
|
nfs_inode_reclaim_delegation(state->inode, |
|
data->owner->so_cred, |
|
data->o_res.delegation_type, |
|
&data->o_res.delegation, |
|
data->o_res.pagemod_limit); |
|
|
|
if (data->o_res.do_recall) |
|
nfs_async_inode_return_delegation(state->inode, |
|
&data->o_res.delegation); |
|
} |
|
|
|
/* |
|
* Check the inode attributes against the CLAIM_PREVIOUS returned attributes |
|
* and update the nfs4_state. |
|
*/ |
|
static struct nfs4_state * |
|
_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) |
|
{ |
|
struct inode *inode = data->state->inode; |
|
struct nfs4_state *state = data->state; |
|
int ret; |
|
|
|
if (!data->rpc_done) { |
|
if (data->rpc_status) |
|
return ERR_PTR(data->rpc_status); |
|
/* cached opens have already been processed */ |
|
goto update; |
|
} |
|
|
|
ret = nfs_refresh_inode(inode, &data->f_attr); |
|
if (ret) |
|
return ERR_PTR(ret); |
|
|
|
if (data->o_res.delegation_type != 0) |
|
nfs4_opendata_check_deleg(data, state); |
|
update: |
|
if (!update_open_stateid(state, &data->o_res.stateid, |
|
NULL, data->o_arg.fmode)) |
|
return ERR_PTR(-EAGAIN); |
|
refcount_inc(&state->count); |
|
|
|
return state; |
|
} |
|
|
|
static struct inode * |
|
nfs4_opendata_get_inode(struct nfs4_opendata *data) |
|
{ |
|
struct inode *inode; |
|
|
|
switch (data->o_arg.claim) { |
|
case NFS4_OPEN_CLAIM_NULL: |
|
case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
|
case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
|
if (!(data->f_attr.valid & NFS_ATTR_FATTR)) |
|
return ERR_PTR(-EAGAIN); |
|
inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, |
|
&data->f_attr, data->f_label); |
|
break; |
|
default: |
|
inode = d_inode(data->dentry); |
|
ihold(inode); |
|
nfs_refresh_inode(inode, &data->f_attr); |
|
} |
|
return inode; |
|
} |
|
|
|
static struct nfs4_state * |
|
nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data) |
|
{ |
|
struct nfs4_state *state; |
|
struct inode *inode; |
|
|
|
inode = nfs4_opendata_get_inode(data); |
|
if (IS_ERR(inode)) |
|
return ERR_CAST(inode); |
|
if (data->state != NULL && data->state->inode == inode) { |
|
state = data->state; |
|
refcount_inc(&state->count); |
|
} else |
|
state = nfs4_get_open_state(inode, data->owner); |
|
iput(inode); |
|
if (state == NULL) |
|
state = ERR_PTR(-ENOMEM); |
|
return state; |
|
} |
|
|
|
static struct nfs4_state * |
|
_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
|
{ |
|
struct nfs4_state *state; |
|
|
|
if (!data->rpc_done) { |
|
state = nfs4_try_open_cached(data); |
|
trace_nfs4_cached_open(data->state); |
|
goto out; |
|
} |
|
|
|
state = nfs4_opendata_find_nfs4_state(data); |
|
if (IS_ERR(state)) |
|
goto out; |
|
|
|
if (data->o_res.delegation_type != 0) |
|
nfs4_opendata_check_deleg(data, state); |
|
if (!update_open_stateid(state, &data->o_res.stateid, |
|
NULL, data->o_arg.fmode)) { |
|
nfs4_put_open_state(state); |
|
state = ERR_PTR(-EAGAIN); |
|
} |
|
out: |
|
nfs_release_seqid(data->o_arg.seqid); |
|
return state; |
|
} |
|
|
|
static struct nfs4_state * |
|
nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
|
{ |
|
struct nfs4_state *ret; |
|
|
|
if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) |
|
ret =_nfs4_opendata_reclaim_to_nfs4_state(data); |
|
else |
|
ret = _nfs4_opendata_to_nfs4_state(data); |
|
nfs4_sequence_free_slot(&data->o_res.seq_res); |
|
return ret; |
|
} |
|
|
|
static struct nfs_open_context * |
|
nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode) |
|
{ |
|
struct nfs_inode *nfsi = NFS_I(state->inode); |
|
struct nfs_open_context *ctx; |
|
|
|
rcu_read_lock(); |
|
list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { |
|
if (ctx->state != state) |
|
continue; |
|
if ((ctx->mode & mode) != mode) |
|
continue; |
|
if (!get_nfs_open_context(ctx)) |
|
continue; |
|
rcu_read_unlock(); |
|
return ctx; |
|
} |
|
rcu_read_unlock(); |
|
return ERR_PTR(-ENOENT); |
|
} |
|
|
|
static struct nfs_open_context * |
|
nfs4_state_find_open_context(struct nfs4_state *state) |
|
{ |
|
struct nfs_open_context *ctx; |
|
|
|
ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE); |
|
if (!IS_ERR(ctx)) |
|
return ctx; |
|
ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE); |
|
if (!IS_ERR(ctx)) |
|
return ctx; |
|
return nfs4_state_find_open_context_mode(state, FMODE_READ); |
|
} |
|
|
|
static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, |
|
struct nfs4_state *state, enum open_claim_type4 claim) |
|
{ |
|
struct nfs4_opendata *opendata; |
|
|
|
opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, |
|
NULL, claim, GFP_NOFS); |
|
if (opendata == NULL) |
|
return ERR_PTR(-ENOMEM); |
|
opendata->state = state; |
|
refcount_inc(&state->count); |
|
return opendata; |
|
} |
|
|
|
static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, |
|
fmode_t fmode) |
|
{ |
|
struct nfs4_state *newstate; |
|
int ret; |
|
|
|
if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) |
|
return 0; |
|
opendata->o_arg.open_flags = 0; |
|
opendata->o_arg.fmode = fmode; |
|
opendata->o_arg.share_access = nfs4_map_atomic_open_share( |
|
NFS_SB(opendata->dentry->d_sb), |
|
fmode, 0); |
|
memset(&opendata->o_res, 0, sizeof(opendata->o_res)); |
|
memset(&opendata->c_res, 0, sizeof(opendata->c_res)); |
|
nfs4_init_opendata_res(opendata); |
|
ret = _nfs4_recover_proc_open(opendata); |
|
if (ret != 0) |
|
return ret; |
|
newstate = nfs4_opendata_to_nfs4_state(opendata); |
|
if (IS_ERR(newstate)) |
|
return PTR_ERR(newstate); |
|
if (newstate != opendata->state) |
|
ret = -ESTALE; |
|
nfs4_close_state(newstate, fmode); |
|
return ret; |
|
} |
|
|
|
static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) |
|
{ |
|
int ret; |
|
|
|
/* memory barrier prior to reading state->n_* */ |
|
smp_rmb(); |
|
ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); |
|
if (ret != 0) |
|
return ret; |
|
ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); |
|
if (ret != 0) |
|
return ret; |
|
ret = nfs4_open_recover_helper(opendata, FMODE_READ); |
|
if (ret != 0) |
|
return ret; |
|
/* |
|
* We may have performed cached opens for all three recoveries. |
|
* Check if we need to update the current stateid. |
|
*/ |
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && |
|
!nfs4_stateid_match(&state->stateid, &state->open_stateid)) { |
|
write_seqlock(&state->seqlock); |
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
|
nfs4_stateid_copy(&state->stateid, &state->open_stateid); |
|
write_sequnlock(&state->seqlock); |
|
} |
|
return 0; |
|
} |
|
|
|
/* |
|
* OPEN_RECLAIM: |
|
* reclaim state on the server after a reboot. |
|
*/ |
|
static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
|
{ |
|
struct nfs_delegation *delegation; |
|
struct nfs4_opendata *opendata; |
|
fmode_t delegation_type = 0; |
|
int status; |
|
|
|
opendata = nfs4_open_recoverdata_alloc(ctx, state, |
|
NFS4_OPEN_CLAIM_PREVIOUS); |
|
if (IS_ERR(opendata)) |
|
return PTR_ERR(opendata); |
|
rcu_read_lock(); |
|
delegation = rcu_dereference(NFS_I(state->inode)->delegation); |
|
if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) |
|
delegation_type = delegation->type; |
|
rcu_read_unlock(); |
|
opendata->o_arg.u.delegation_type = delegation_type; |
|
status = nfs4_open_recover(opendata, state); |
|
nfs4_opendata_put(opendata); |
|
return status; |
|
} |
|
|
|
static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(state->inode); |
|
struct nfs4_exception exception = { }; |
|
int err; |
|
do { |
|
err = _nfs4_do_open_reclaim(ctx, state); |
|
trace_nfs4_open_reclaim(ctx, 0, err); |
|
if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) |
|
continue; |
|
if (err != -NFS4ERR_DELAY) |
|
break; |
|
nfs4_handle_exception(server, err, &exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
|
{ |
|
struct nfs_open_context *ctx; |
|
int ret; |
|
|
|
ctx = nfs4_state_find_open_context(state); |
|
if (IS_ERR(ctx)) |
|
return -EAGAIN; |
|
clear_bit(NFS_DELEGATED_STATE, &state->flags); |
|
nfs_state_clear_open_state_flags(state); |
|
ret = nfs4_do_open_reclaim(ctx, state); |
|
put_nfs_open_context(ctx); |
|
return ret; |
|
} |
|
|
|
static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, struct file_lock *fl, int err) |
|
{ |
|
switch (err) { |
|
default: |
|
printk(KERN_ERR "NFS: %s: unhandled error " |
|
"%d.\n", __func__, err); |
|
case 0: |
|
case -ENOENT: |
|
case -EAGAIN: |
|
case -ESTALE: |
|
case -ETIMEDOUT: |
|
break; |
|
case -NFS4ERR_BADSESSION: |
|
case -NFS4ERR_BADSLOT: |
|
case -NFS4ERR_BAD_HIGH_SLOT: |
|
case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
|
case -NFS4ERR_DEADSESSION: |
|
return -EAGAIN; |
|
case -NFS4ERR_STALE_CLIENTID: |
|
case -NFS4ERR_STALE_STATEID: |
|
/* Don't recall a delegation if it was lost */ |
|
nfs4_schedule_lease_recovery(server->nfs_client); |
|
return -EAGAIN; |
|
case -NFS4ERR_MOVED: |
|
nfs4_schedule_migration_recovery(server); |
|
return -EAGAIN; |
|
case -NFS4ERR_LEASE_MOVED: |
|
nfs4_schedule_lease_moved_recovery(server->nfs_client); |
|
return -EAGAIN; |
|
case -NFS4ERR_DELEG_REVOKED: |
|
case -NFS4ERR_ADMIN_REVOKED: |
|
case -NFS4ERR_EXPIRED: |
|
case -NFS4ERR_BAD_STATEID: |
|
case -NFS4ERR_OPENMODE: |
|
nfs_inode_find_state_and_recover(state->inode, |
|
stateid); |
|
nfs4_schedule_stateid_recovery(server, state); |
|
return -EAGAIN; |
|
case -NFS4ERR_DELAY: |
|
case -NFS4ERR_GRACE: |
|
ssleep(1); |
|
return -EAGAIN; |
|
case -ENOMEM: |
|
case -NFS4ERR_DENIED: |
|
if (fl) { |
|
struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner; |
|
if (lsp) |
|
set_bit(NFS_LOCK_LOST, &lsp->ls_flags); |
|
} |
|
return 0; |
|
} |
|
return err; |
|
} |
|
|
|
int nfs4_open_delegation_recall(struct nfs_open_context *ctx, |
|
struct nfs4_state *state, const nfs4_stateid *stateid) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(state->inode); |
|
struct nfs4_opendata *opendata; |
|
int err = 0; |
|
|
|
opendata = nfs4_open_recoverdata_alloc(ctx, state, |
|
NFS4_OPEN_CLAIM_DELEG_CUR_FH); |
|
if (IS_ERR(opendata)) |
|
return PTR_ERR(opendata); |
|
nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); |
|
if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) { |
|
err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); |
|
if (err) |
|
goto out; |
|
} |
|
if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) { |
|
err = nfs4_open_recover_helper(opendata, FMODE_WRITE); |
|
if (err) |
|
goto out; |
|
} |
|
if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) { |
|
err = nfs4_open_recover_helper(opendata, FMODE_READ); |
|
if (err) |
|
goto out; |
|
} |
|
nfs_state_clear_delegation(state); |
|
out: |
|
nfs4_opendata_put(opendata); |
|
return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err); |
|
} |
|
|
|
static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_opendata *data = calldata; |
|
|
|
nfs4_setup_sequence(data->o_arg.server->nfs_client, |
|
&data->c_arg.seq_args, &data->c_res.seq_res, task); |
|
} |
|
|
|
static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_opendata *data = calldata; |
|
|
|
nfs40_sequence_done(task, &data->c_res.seq_res); |
|
|
|
data->rpc_status = task->tk_status; |
|
if (data->rpc_status == 0) { |
|
nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); |
|
nfs_confirm_seqid(&data->owner->so_seqid, 0); |
|
renew_lease(data->o_res.server, data->timestamp); |
|
data->rpc_done = true; |
|
} |
|
} |
|
|
|
static void nfs4_open_confirm_release(void *calldata) |
|
{ |
|
struct nfs4_opendata *data = calldata; |
|
struct nfs4_state *state = NULL; |
|
|
|
/* If this request hasn't been cancelled, do nothing */ |
|
if (!data->cancelled) |
|
goto out_free; |
|
/* In case of error, no cleanup! */ |
|
if (!data->rpc_done) |
|
goto out_free; |
|
state = nfs4_opendata_to_nfs4_state(data); |
|
if (!IS_ERR(state)) |
|
nfs4_close_state(state, data->o_arg.fmode); |
|
out_free: |
|
nfs4_opendata_put(data); |
|
} |
|
|
|
static const struct rpc_call_ops nfs4_open_confirm_ops = { |
|
.rpc_call_prepare = nfs4_open_confirm_prepare, |
|
.rpc_call_done = nfs4_open_confirm_done, |
|
.rpc_release = nfs4_open_confirm_release, |
|
}; |
|
|
|
/* |
|
* Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata |
|
*/ |
|
static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); |
|
struct rpc_task *task; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], |
|
.rpc_argp = &data->c_arg, |
|
.rpc_resp = &data->c_res, |
|
.rpc_cred = data->owner->so_cred, |
|
}; |
|
struct rpc_task_setup task_setup_data = { |
|
.rpc_client = server->client, |
|
.rpc_message = &msg, |
|
.callback_ops = &nfs4_open_confirm_ops, |
|
.callback_data = data, |
|
.workqueue = nfsiod_workqueue, |
|
.flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, |
|
}; |
|
int status; |
|
|
|
nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1, |
|
data->is_recover); |
|
kref_get(&data->kref); |
|
data->rpc_done = false; |
|
data->rpc_status = 0; |
|
data->timestamp = jiffies; |
|
task = rpc_run_task(&task_setup_data); |
|
if (IS_ERR(task)) |
|
return PTR_ERR(task); |
|
status = rpc_wait_for_completion_task(task); |
|
if (status != 0) { |
|
data->cancelled = true; |
|
smp_wmb(); |
|
} else |
|
status = data->rpc_status; |
|
rpc_put_task(task); |
|
return status; |
|
} |
|
|
|
static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_opendata *data = calldata; |
|
struct nfs4_state_owner *sp = data->owner; |
|
struct nfs_client *clp = sp->so_server->nfs_client; |
|
enum open_claim_type4 claim = data->o_arg.claim; |
|
|
|
if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) |
|
goto out_wait; |
|
/* |
|
* Check if we still need to send an OPEN call, or if we can use |
|
* a delegation instead. |
|
*/ |
|
if (data->state != NULL) { |
|
struct nfs_delegation *delegation; |
|
|
|
if (can_open_cached(data->state, data->o_arg.fmode, |
|
data->o_arg.open_flags, claim)) |
|
goto out_no_action; |
|
rcu_read_lock(); |
|
delegation = nfs4_get_valid_delegation(data->state->inode); |
|
if (can_open_delegated(delegation, data->o_arg.fmode, claim)) |
|
goto unlock_no_action; |
|
rcu_read_unlock(); |
|
} |
|
/* Update client id. */ |
|
data->o_arg.clientid = clp->cl_clientid; |
|
switch (claim) { |
|
default: |
|
break; |
|
case NFS4_OPEN_CLAIM_PREVIOUS: |
|
case NFS4_OPEN_CLAIM_DELEG_CUR_FH: |
|
case NFS4_OPEN_CLAIM_DELEG_PREV_FH: |
|
data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; |
|
fallthrough; |
|
case NFS4_OPEN_CLAIM_FH: |
|
task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; |
|
} |
|
data->timestamp = jiffies; |
|
if (nfs4_setup_sequence(data->o_arg.server->nfs_client, |
|
&data->o_arg.seq_args, |
|
&data->o_res.seq_res, |
|
task) != 0) |
|
nfs_release_seqid(data->o_arg.seqid); |
|
|
|
/* Set the create mode (note dependency on the session type) */ |
|
data->o_arg.createmode = NFS4_CREATE_UNCHECKED; |
|
if (data->o_arg.open_flags & O_EXCL) { |
|
data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; |
|
if (nfs4_has_persistent_session(clp)) |
|
data->o_arg.createmode = NFS4_CREATE_GUARDED; |
|
else if (clp->cl_mvops->minor_version > 0) |
|
data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; |
|
} |
|
return; |
|
unlock_no_action: |
|
trace_nfs4_cached_open(data->state); |
|
rcu_read_unlock(); |
|
out_no_action: |
|
task->tk_action = NULL; |
|
out_wait: |
|
nfs4_sequence_done(task, &data->o_res.seq_res); |
|
} |
|
|
|
static void nfs4_open_done(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_opendata *data = calldata; |
|
|
|
data->rpc_status = task->tk_status; |
|
|
|
if (!nfs4_sequence_process(task, &data->o_res.seq_res)) |
|
return; |
|
|
|
if (task->tk_status == 0) { |
|
if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { |
|
switch (data->o_res.f_attr->mode & S_IFMT) { |
|
case S_IFREG: |
|
break; |
|
case S_IFLNK: |
|
data->rpc_status = -ELOOP; |
|
break; |
|
case S_IFDIR: |
|
data->rpc_status = -EISDIR; |
|
break; |
|
default: |
|
data->rpc_status = -ENOTDIR; |
|
} |
|
} |
|
renew_lease(data->o_res.server, data->timestamp); |
|
if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) |
|
nfs_confirm_seqid(&data->owner->so_seqid, 0); |
|
} |
|
data->rpc_done = true; |
|
} |
|
|
|
static void nfs4_open_release(void *calldata) |
|
{ |
|
struct nfs4_opendata *data = calldata; |
|
struct nfs4_state *state = NULL; |
|
|
|
/* If this request hasn't been cancelled, do nothing */ |
|
if (!data->cancelled) |
|
goto out_free; |
|
/* In case of error, no cleanup! */ |
|
if (data->rpc_status != 0 || !data->rpc_done) |
|
goto out_free; |
|
/* In case we need an open_confirm, no cleanup! */ |
|
if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) |
|
goto out_free; |
|
state = nfs4_opendata_to_nfs4_state(data); |
|
if (!IS_ERR(state)) |
|
nfs4_close_state(state, data->o_arg.fmode); |
|
out_free: |
|
nfs4_opendata_put(data); |
|
} |
|
|
|
static const struct rpc_call_ops nfs4_open_ops = { |
|
.rpc_call_prepare = nfs4_open_prepare, |
|
.rpc_call_done = nfs4_open_done, |
|
.rpc_release = nfs4_open_release, |
|
}; |
|
|
|
static int nfs4_run_open_task(struct nfs4_opendata *data, |
|
struct nfs_open_context *ctx) |
|
{ |
|
struct inode *dir = d_inode(data->dir); |
|
struct nfs_server *server = NFS_SERVER(dir); |
|
struct nfs_openargs *o_arg = &data->o_arg; |
|
struct nfs_openres *o_res = &data->o_res; |
|
struct rpc_task *task; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], |
|
.rpc_argp = o_arg, |
|
.rpc_resp = o_res, |
|
.rpc_cred = data->owner->so_cred, |
|
}; |
|
struct rpc_task_setup task_setup_data = { |
|
.rpc_client = server->client, |
|
.rpc_message = &msg, |
|
.callback_ops = &nfs4_open_ops, |
|
.callback_data = data, |
|
.workqueue = nfsiod_workqueue, |
|
.flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, |
|
}; |
|
int status; |
|
|
|
kref_get(&data->kref); |
|
data->rpc_done = false; |
|
data->rpc_status = 0; |
|
data->cancelled = false; |
|
data->is_recover = false; |
|
if (!ctx) { |
|
nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1); |
|
data->is_recover = true; |
|
task_setup_data.flags |= RPC_TASK_TIMEOUT; |
|
} else { |
|
nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0); |
|
pnfs_lgopen_prepare(data, ctx); |
|
} |
|
task = rpc_run_task(&task_setup_data); |
|
if (IS_ERR(task)) |
|
return PTR_ERR(task); |
|
status = rpc_wait_for_completion_task(task); |
|
if (status != 0) { |
|
data->cancelled = true; |
|
smp_wmb(); |
|
} else |
|
status = data->rpc_status; |
|
rpc_put_task(task); |
|
|
|
return status; |
|
} |
|
|
|
static int _nfs4_recover_proc_open(struct nfs4_opendata *data) |
|
{ |
|
struct inode *dir = d_inode(data->dir); |
|
struct nfs_openres *o_res = &data->o_res; |
|
int status; |
|
|
|
status = nfs4_run_open_task(data, NULL); |
|
if (status != 0 || !data->rpc_done) |
|
return status; |
|
|
|
nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); |
|
|
|
if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) |
|
status = _nfs4_proc_open_confirm(data); |
|
|
|
return status; |
|
} |
|
|
|
/* |
|
* Additional permission checks in order to distinguish between an |
|
* open for read, and an open for execute. This works around the |
|
* fact that NFSv4 OPEN treats read and execute permissions as being |
|
* the same. |
|
* Note that in the non-execute case, we want to turn off permission |
|
* checking if we just created a new file (POSIX open() semantics). |
|
*/ |
|
static int nfs4_opendata_access(const struct cred *cred, |
|
struct nfs4_opendata *opendata, |
|
struct nfs4_state *state, fmode_t fmode, |
|
int openflags) |
|
{ |
|
struct nfs_access_entry cache; |
|
u32 mask, flags; |
|
|
|
/* access call failed or for some reason the server doesn't |
|
* support any access modes -- defer access call until later */ |
|
if (opendata->o_res.access_supported == 0) |
|
return 0; |
|
|
|
mask = 0; |
|
/* |
|
* Use openflags to check for exec, because fmode won't |
|
* always have FMODE_EXEC set when file open for exec. |
|
*/ |
|
if (openflags & __FMODE_EXEC) { |
|
/* ONLY check for exec rights */ |
|
if (S_ISDIR(state->inode->i_mode)) |
|
mask = NFS4_ACCESS_LOOKUP; |
|
else |
|
mask = NFS4_ACCESS_EXECUTE; |
|
} else if ((fmode & FMODE_READ) && !opendata->file_created) |
|
mask = NFS4_ACCESS_READ; |
|
|
|
cache.cred = cred; |
|
nfs_access_set_mask(&cache, opendata->o_res.access_result); |
|
nfs_access_add_cache(state->inode, &cache); |
|
|
|
flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP; |
|
if ((mask & ~cache.mask & flags) == 0) |
|
return 0; |
|
|
|
return -EACCES; |
|
} |
|
|
|
/* |
|
* Note: On error, nfs4_proc_open will free the struct nfs4_opendata |
|
*/ |
|
static int _nfs4_proc_open(struct nfs4_opendata *data, |
|
struct nfs_open_context *ctx) |
|
{ |
|
struct inode *dir = d_inode(data->dir); |
|
struct nfs_server *server = NFS_SERVER(dir); |
|
struct nfs_openargs *o_arg = &data->o_arg; |
|
struct nfs_openres *o_res = &data->o_res; |
|
int status; |
|
|
|
status = nfs4_run_open_task(data, ctx); |
|
if (!data->rpc_done) |
|
return status; |
|
if (status != 0) { |
|
if (status == -NFS4ERR_BADNAME && |
|
!(o_arg->open_flags & O_CREAT)) |
|
return -ENOENT; |
|
return status; |
|
} |
|
|
|
nfs_fattr_map_and_free_names(server, &data->f_attr); |
|
|
|
if (o_arg->open_flags & O_CREAT) { |
|
if (o_arg->open_flags & O_EXCL) |
|
data->file_created = true; |
|
else if (o_res->cinfo.before != o_res->cinfo.after) |
|
data->file_created = true; |
|
if (data->file_created || |
|
inode_peek_iversion_raw(dir) != o_res->cinfo.after) |
|
nfs4_update_changeattr(dir, &o_res->cinfo, |
|
o_res->f_attr->time_start, |
|
NFS_INO_INVALID_DATA); |
|
} |
|
if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) |
|
server->caps &= ~NFS_CAP_POSIX_LOCK; |
|
if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
|
status = _nfs4_proc_open_confirm(data); |
|
if (status != 0) |
|
return status; |
|
} |
|
if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) { |
|
nfs4_sequence_free_slot(&o_res->seq_res); |
|
nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, |
|
o_res->f_label, NULL); |
|
} |
|
return 0; |
|
} |
|
|
|
/* |
|
* OPEN_EXPIRED: |
|
* reclaim state on the server after a network partition. |
|
* Assumes caller holds the appropriate lock |
|
*/ |
|
static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
|
{ |
|
struct nfs4_opendata *opendata; |
|
int ret; |
|
|
|
opendata = nfs4_open_recoverdata_alloc(ctx, state, |
|
NFS4_OPEN_CLAIM_FH); |
|
if (IS_ERR(opendata)) |
|
return PTR_ERR(opendata); |
|
ret = nfs4_open_recover(opendata, state); |
|
if (ret == -ESTALE) |
|
d_drop(ctx->dentry); |
|
nfs4_opendata_put(opendata); |
|
return ret; |
|
} |
|
|
|
static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(state->inode); |
|
struct nfs4_exception exception = { }; |
|
int err; |
|
|
|
do { |
|
err = _nfs4_open_expired(ctx, state); |
|
trace_nfs4_open_expired(ctx, 0, err); |
|
if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) |
|
continue; |
|
switch (err) { |
|
default: |
|
goto out; |
|
case -NFS4ERR_GRACE: |
|
case -NFS4ERR_DELAY: |
|
nfs4_handle_exception(server, err, &exception); |
|
err = 0; |
|
} |
|
} while (exception.retry); |
|
out: |
|
return err; |
|
} |
|
|
|
static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
|
{ |
|
struct nfs_open_context *ctx; |
|
int ret; |
|
|
|
ctx = nfs4_state_find_open_context(state); |
|
if (IS_ERR(ctx)) |
|
return -EAGAIN; |
|
ret = nfs4_do_open_expired(ctx, state); |
|
put_nfs_open_context(ctx); |
|
return ret; |
|
} |
|
|
|
static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, |
|
const nfs4_stateid *stateid) |
|
{ |
|
nfs_remove_bad_delegation(state->inode, stateid); |
|
nfs_state_clear_delegation(state); |
|
} |
|
|
|
static void nfs40_clear_delegation_stateid(struct nfs4_state *state) |
|
{ |
|
if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) |
|
nfs_finish_clear_delegation_stateid(state, NULL); |
|
} |
|
|
|
static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
|
{ |
|
/* NFSv4.0 doesn't allow for delegation recovery on open expire */ |
|
nfs40_clear_delegation_stateid(state); |
|
nfs_state_clear_open_state_flags(state); |
|
return nfs4_open_expired(sp, state); |
|
} |
|
|
|
static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, |
|
nfs4_stateid *stateid, |
|
const struct cred *cred) |
|
{ |
|
return -NFS4ERR_BAD_STATEID; |
|
} |
|
|
|
#if defined(CONFIG_NFS_V4_1) |
|
static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, |
|
nfs4_stateid *stateid, |
|
const struct cred *cred) |
|
{ |
|
int status; |
|
|
|
switch (stateid->type) { |
|
default: |
|
break; |
|
case NFS4_INVALID_STATEID_TYPE: |
|
case NFS4_SPECIAL_STATEID_TYPE: |
|
return -NFS4ERR_BAD_STATEID; |
|
case NFS4_REVOKED_STATEID_TYPE: |
|
goto out_free; |
|
} |
|
|
|
status = nfs41_test_stateid(server, stateid, cred); |
|
switch (status) { |
|
case -NFS4ERR_EXPIRED: |
|
case -NFS4ERR_ADMIN_REVOKED: |
|
case -NFS4ERR_DELEG_REVOKED: |
|
break; |
|
default: |
|
return status; |
|
} |
|
out_free: |
|
/* Ack the revoked state to the server */ |
|
nfs41_free_stateid(server, stateid, cred, true); |
|
return -NFS4ERR_EXPIRED; |
|
} |
|
|
|
static int nfs41_check_delegation_stateid(struct nfs4_state *state) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(state->inode); |
|
nfs4_stateid stateid; |
|
struct nfs_delegation *delegation; |
|
const struct cred *cred = NULL; |
|
int status, ret = NFS_OK; |
|
|
|
/* Get the delegation credential for use by test/free_stateid */ |
|
rcu_read_lock(); |
|
delegation = rcu_dereference(NFS_I(state->inode)->delegation); |
|
if (delegation == NULL) { |
|
rcu_read_unlock(); |
|
nfs_state_clear_delegation(state); |
|
return NFS_OK; |
|
} |
|
|
|
spin_lock(&delegation->lock); |
|
nfs4_stateid_copy(&stateid, &delegation->stateid); |
|
|
|
if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, |
|
&delegation->flags)) { |
|
spin_unlock(&delegation->lock); |
|
rcu_read_unlock(); |
|
return NFS_OK; |
|
} |
|
|
|
if (delegation->cred) |
|
cred = get_cred(delegation->cred); |
|
spin_unlock(&delegation->lock); |
|
rcu_read_unlock(); |
|
status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); |
|
trace_nfs4_test_delegation_stateid(state, NULL, status); |
|
if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) |
|
nfs_finish_clear_delegation_stateid(state, &stateid); |
|
else |
|
ret = status; |
|
|
|
put_cred(cred); |
|
return ret; |
|
} |
|
|
|
static void nfs41_delegation_recover_stateid(struct nfs4_state *state) |
|
{ |
|
nfs4_stateid tmp; |
|
|
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags) && |
|
nfs4_copy_delegation_stateid(state->inode, state->state, |
|
&tmp, NULL) && |
|
nfs4_stateid_match_other(&state->stateid, &tmp)) |
|
nfs_state_set_delegation(state, &tmp, state->state); |
|
else |
|
nfs_state_clear_delegation(state); |
|
} |
|
|
|
/** |
|
* nfs41_check_expired_locks - possibly free a lock stateid |
|
* |
|
* @state: NFSv4 state for an inode |
|
* |
|
* Returns NFS_OK if recovery for this stateid is now finished. |
|
* Otherwise a negative NFS4ERR value is returned. |
|
*/ |
|
static int nfs41_check_expired_locks(struct nfs4_state *state) |
|
{ |
|
int status, ret = NFS_OK; |
|
struct nfs4_lock_state *lsp, *prev = NULL; |
|
struct nfs_server *server = NFS_SERVER(state->inode); |
|
|
|
if (!test_bit(LK_STATE_IN_USE, &state->flags)) |
|
goto out; |
|
|
|
spin_lock(&state->state_lock); |
|
list_for_each_entry(lsp, &state->lock_states, ls_locks) { |
|
if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { |
|
const struct cred *cred = lsp->ls_state->owner->so_cred; |
|
|
|
refcount_inc(&lsp->ls_count); |
|
spin_unlock(&state->state_lock); |
|
|
|
nfs4_put_lock_state(prev); |
|
prev = lsp; |
|
|
|
status = nfs41_test_and_free_expired_stateid(server, |
|
&lsp->ls_stateid, |
|
cred); |
|
trace_nfs4_test_lock_stateid(state, lsp, status); |
|
if (status == -NFS4ERR_EXPIRED || |
|
status == -NFS4ERR_BAD_STATEID) { |
|
clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); |
|
lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; |
|
if (!recover_lost_locks) |
|
set_bit(NFS_LOCK_LOST, &lsp->ls_flags); |
|
} else if (status != NFS_OK) { |
|
ret = status; |
|
nfs4_put_lock_state(prev); |
|
goto out; |
|
} |
|
spin_lock(&state->state_lock); |
|
} |
|
} |
|
spin_unlock(&state->state_lock); |
|
nfs4_put_lock_state(prev); |
|
out: |
|
return ret; |
|
} |
|
|
|
/** |
|
* nfs41_check_open_stateid - possibly free an open stateid |
|
* |
|
* @state: NFSv4 state for an inode |
|
* |
|
* Returns NFS_OK if recovery for this stateid is now finished. |
|
* Otherwise a negative NFS4ERR value is returned. |
|
*/ |
|
static int nfs41_check_open_stateid(struct nfs4_state *state) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(state->inode); |
|
nfs4_stateid *stateid = &state->open_stateid; |
|
const struct cred *cred = state->owner->so_cred; |
|
int status; |
|
|
|
if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) |
|
return -NFS4ERR_BAD_STATEID; |
|
status = nfs41_test_and_free_expired_stateid(server, stateid, cred); |
|
trace_nfs4_test_open_stateid(state, NULL, status); |
|
if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { |
|
nfs_state_clear_open_state_flags(state); |
|
stateid->type = NFS4_INVALID_STATEID_TYPE; |
|
return status; |
|
} |
|
if (nfs_open_stateid_recover_openmode(state)) |
|
return -NFS4ERR_OPENMODE; |
|
return NFS_OK; |
|
} |
|
|
|
static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
|
{ |
|
int status; |
|
|
|
status = nfs41_check_delegation_stateid(state); |
|
if (status != NFS_OK) |
|
return status; |
|
nfs41_delegation_recover_stateid(state); |
|
|
|
status = nfs41_check_expired_locks(state); |
|
if (status != NFS_OK) |
|
return status; |
|
status = nfs41_check_open_stateid(state); |
|
if (status != NFS_OK) |
|
status = nfs4_open_expired(sp, state); |
|
return status; |
|
} |
|
#endif |
|
|
|
/* |
|
* on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* |
|
* fields corresponding to attributes that were used to store the verifier. |
|
* Make sure we clobber those fields in the later setattr call |
|
*/ |
|
static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata, |
|
struct iattr *sattr, struct nfs4_label **label) |
|
{ |
|
const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask; |
|
__u32 attrset[3]; |
|
unsigned ret; |
|
unsigned i; |
|
|
|
for (i = 0; i < ARRAY_SIZE(attrset); i++) { |
|
attrset[i] = opendata->o_res.attrset[i]; |
|
if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1) |
|
attrset[i] &= ~bitmask[i]; |
|
} |
|
|
|
ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ? |
|
sattr->ia_valid : 0; |
|
|
|
if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) { |
|
if (sattr->ia_valid & ATTR_ATIME_SET) |
|
ret |= ATTR_ATIME_SET; |
|
else |
|
ret |= ATTR_ATIME; |
|
} |
|
|
|
if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) { |
|
if (sattr->ia_valid & ATTR_MTIME_SET) |
|
ret |= ATTR_MTIME_SET; |
|
else |
|
ret |= ATTR_MTIME; |
|
} |
|
|
|
if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL)) |
|
*label = NULL; |
|
return ret; |
|
} |
|
|
|
static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, |
|
int flags, struct nfs_open_context *ctx) |
|
{ |
|
struct nfs4_state_owner *sp = opendata->owner; |
|
struct nfs_server *server = sp->so_server; |
|
struct dentry *dentry; |
|
struct nfs4_state *state; |
|
fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx); |
|
struct inode *dir = d_inode(opendata->dir); |
|
unsigned long dir_verifier; |
|
unsigned int seq; |
|
int ret; |
|
|
|
seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); |
|
dir_verifier = nfs_save_change_attribute(dir); |
|
|
|
ret = _nfs4_proc_open(opendata, ctx); |
|
if (ret != 0) |
|
goto out; |
|
|
|
state = _nfs4_opendata_to_nfs4_state(opendata); |
|
ret = PTR_ERR(state); |
|
if (IS_ERR(state)) |
|
goto out; |
|
ctx->state = state; |
|
if (server->caps & NFS_CAP_POSIX_LOCK) |
|
set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); |
|
if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) |
|
set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); |
|
|
|
dentry = opendata->dentry; |
|
if (d_really_is_negative(dentry)) { |
|
struct dentry *alias; |
|
d_drop(dentry); |
|
alias = d_exact_alias(dentry, state->inode); |
|
if (!alias) |
|
alias = d_splice_alias(igrab(state->inode), dentry); |
|
/* d_splice_alias() can't fail here - it's a non-directory */ |
|
if (alias) { |
|
dput(ctx->dentry); |
|
ctx->dentry = dentry = alias; |
|
} |
|
} |
|
|
|
switch(opendata->o_arg.claim) { |
|
default: |
|
break; |
|
case NFS4_OPEN_CLAIM_NULL: |
|
case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
|
case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
|
if (!opendata->rpc_done) |
|
break; |
|
if (opendata->o_res.delegation_type != 0) |
|
dir_verifier = nfs_save_change_attribute(dir); |
|
nfs_set_verifier(dentry, dir_verifier); |
|
} |
|
|
|
/* Parse layoutget results before we check for access */ |
|
pnfs_parse_lgopen(state->inode, opendata->lgp, ctx); |
|
|
|
ret = nfs4_opendata_access(sp->so_cred, opendata, state, |
|
acc_mode, flags); |
|
if (ret != 0) |
|
goto out; |
|
|
|
if (d_inode(dentry) == state->inode) { |
|
nfs_inode_attach_open_context(ctx); |
|
if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) |
|
nfs4_schedule_stateid_recovery(server, state); |
|
} |
|
|
|
out: |
|
if (!opendata->cancelled) |
|
nfs4_sequence_free_slot(&opendata->o_res.seq_res); |
|
return ret; |
|
} |
|
|
|
/* |
|
* Returns a referenced nfs4_state |
|
*/ |
|
static int _nfs4_do_open(struct inode *dir, |
|
struct nfs_open_context *ctx, |
|
int flags, |
|
const struct nfs4_open_createattrs *c, |
|
int *opened) |
|
{ |
|
struct nfs4_state_owner *sp; |
|
struct nfs4_state *state = NULL; |
|
struct nfs_server *server = NFS_SERVER(dir); |
|
struct nfs4_opendata *opendata; |
|
struct dentry *dentry = ctx->dentry; |
|
const struct cred *cred = ctx->cred; |
|
struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; |
|
fmode_t fmode = _nfs4_ctx_to_openmode(ctx); |
|
enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; |
|
struct iattr *sattr = c->sattr; |
|
struct nfs4_label *label = c->label; |
|
struct nfs4_label *olabel = NULL; |
|
int status; |
|
|
|
/* Protect against reboot recovery conflicts */ |
|
status = -ENOMEM; |
|
sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); |
|
if (sp == NULL) { |
|
dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); |
|
goto out_err; |
|
} |
|
status = nfs4_client_recover_expired_lease(server->nfs_client); |
|
if (status != 0) |
|
goto err_put_state_owner; |
|
if (d_really_is_positive(dentry)) |
|
nfs4_return_incompatible_delegation(d_inode(dentry), fmode); |
|
status = -ENOMEM; |
|
if (d_really_is_positive(dentry)) |
|
claim = NFS4_OPEN_CLAIM_FH; |
|
opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, |
|
c, claim, GFP_KERNEL); |
|
if (opendata == NULL) |
|
goto err_put_state_owner; |
|
|
|
if (label) { |
|
olabel = nfs4_label_alloc(server, GFP_KERNEL); |
|
if (IS_ERR(olabel)) { |
|
status = PTR_ERR(olabel); |
|
goto err_opendata_put; |
|
} |
|
} |
|
|
|
if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { |
|
if (!opendata->f_attr.mdsthreshold) { |
|
opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); |
|
if (!opendata->f_attr.mdsthreshold) |
|
goto err_free_label; |
|
} |
|
opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; |
|
} |
|
if (d_really_is_positive(dentry)) |
|
opendata->state = nfs4_get_open_state(d_inode(dentry), sp); |
|
|
|
status = _nfs4_open_and_get_state(opendata, flags, ctx); |
|
if (status != 0) |
|
goto err_free_label; |
|
state = ctx->state; |
|
|
|
if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && |
|
(opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { |
|
unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label); |
|
/* |
|
* send create attributes which was not set by open |
|
* with an extra setattr. |
|
*/ |
|
if (attrs || label) { |
|
unsigned ia_old = sattr->ia_valid; |
|
|
|
sattr->ia_valid = attrs; |
|
nfs_fattr_init(opendata->o_res.f_attr); |
|
status = nfs4_do_setattr(state->inode, cred, |
|
opendata->o_res.f_attr, sattr, |
|
ctx, label, olabel); |
|
if (status == 0) { |
|
nfs_setattr_update_inode(state->inode, sattr, |
|
opendata->o_res.f_attr); |
|
nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel); |
|
} |
|
sattr->ia_valid = ia_old; |
|
} |
|
} |
|
if (opened && opendata->file_created) |
|
*opened = 1; |
|
|
|
if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { |
|
*ctx_th = opendata->f_attr.mdsthreshold; |
|
opendata->f_attr.mdsthreshold = NULL; |
|
} |
|
|
|
nfs4_label_free(olabel); |
|
|
|
nfs4_opendata_put(opendata); |
|
nfs4_put_state_owner(sp); |
|
return 0; |
|
err_free_label: |
|
nfs4_label_free(olabel); |
|
err_opendata_put: |
|
nfs4_opendata_put(opendata); |
|
err_put_state_owner: |
|
nfs4_put_state_owner(sp); |
|
out_err: |
|
return status; |
|
} |
|
|
|
|
|
static struct nfs4_state *nfs4_do_open(struct inode *dir, |
|
struct nfs_open_context *ctx, |
|
int flags, |
|
struct iattr *sattr, |
|
struct nfs4_label *label, |
|
int *opened) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(dir); |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
struct nfs4_state *res; |
|
struct nfs4_open_createattrs c = { |
|
.label = label, |
|
.sattr = sattr, |
|
.verf = { |
|
[0] = (__u32)jiffies, |
|
[1] = (__u32)current->pid, |
|
}, |
|
}; |
|
int status; |
|
|
|
do { |
|
status = _nfs4_do_open(dir, ctx, flags, &c, opened); |
|
res = ctx->state; |
|
trace_nfs4_open_file(ctx, flags, status); |
|
if (status == 0) |
|
break; |
|
/* NOTE: BAD_SEQID means the server and client disagree about the |
|
* book-keeping w.r.t. state-changing operations |
|
* (OPEN/CLOSE/LOCK/LOCKU...) |
|
* It is actually a sign of a bug on the client or on the server. |
|
* |
|
* If we receive a BAD_SEQID error in the particular case of |
|
* doing an OPEN, we assume that nfs_increment_open_seqid() will |
|
* have unhashed the old state_owner for us, and that we can |
|
* therefore safely retry using a new one. We should still warn |
|
* the user though... |
|
*/ |
|
if (status == -NFS4ERR_BAD_SEQID) { |
|
pr_warn_ratelimited("NFS: v4 server %s " |
|
" returned a bad sequence-id error!\n", |
|
NFS_SERVER(dir)->nfs_client->cl_hostname); |
|
exception.retry = 1; |
|
continue; |
|
} |
|
/* |
|
* BAD_STATEID on OPEN means that the server cancelled our |
|
* state before it received the OPEN_CONFIRM. |
|
* Recover by retrying the request as per the discussion |
|
* on Page 181 of RFC3530. |
|
*/ |
|
if (status == -NFS4ERR_BAD_STATEID) { |
|
exception.retry = 1; |
|
continue; |
|
} |
|
if (status == -NFS4ERR_EXPIRED) { |
|
nfs4_schedule_lease_recovery(server->nfs_client); |
|
exception.retry = 1; |
|
continue; |
|
} |
|
if (status == -EAGAIN) { |
|
/* We must have found a delegation */ |
|
exception.retry = 1; |
|
continue; |
|
} |
|
if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) |
|
continue; |
|
res = ERR_PTR(nfs4_handle_exception(server, |
|
status, &exception)); |
|
} while (exception.retry); |
|
return res; |
|
} |
|
|
|
static int _nfs4_do_setattr(struct inode *inode, |
|
struct nfs_setattrargs *arg, |
|
struct nfs_setattrres *res, |
|
const struct cred *cred, |
|
struct nfs_open_context *ctx) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
|
.rpc_argp = arg, |
|
.rpc_resp = res, |
|
.rpc_cred = cred, |
|
}; |
|
const struct cred *delegation_cred = NULL; |
|
unsigned long timestamp = jiffies; |
|
bool truncate; |
|
int status; |
|
|
|
nfs_fattr_init(res->fattr); |
|
|
|
/* Servers should only apply open mode checks for file size changes */ |
|
truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; |
|
if (!truncate) { |
|
nfs4_inode_make_writeable(inode); |
|
goto zero_stateid; |
|
} |
|
|
|
if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) { |
|
/* Use that stateid */ |
|
} else if (ctx != NULL && ctx->state) { |
|
struct nfs_lock_context *l_ctx; |
|
if (!nfs4_valid_open_stateid(ctx->state)) |
|
return -EBADF; |
|
l_ctx = nfs_get_lock_context(ctx); |
|
if (IS_ERR(l_ctx)) |
|
return PTR_ERR(l_ctx); |
|
status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, |
|
&arg->stateid, &delegation_cred); |
|
nfs_put_lock_context(l_ctx); |
|
if (status == -EIO) |
|
return -EBADF; |
|
else if (status == -EAGAIN) |
|
goto zero_stateid; |
|
} else { |
|
zero_stateid: |
|
nfs4_stateid_copy(&arg->stateid, &zero_stateid); |
|
} |
|
if (delegation_cred) |
|
msg.rpc_cred = delegation_cred; |
|
|
|
status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); |
|
|
|
put_cred(delegation_cred); |
|
if (status == 0 && ctx != NULL) |
|
renew_lease(server, timestamp); |
|
trace_nfs4_setattr(inode, &arg->stateid, status); |
|
return status; |
|
} |
|
|
|
static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, |
|
struct nfs_fattr *fattr, struct iattr *sattr, |
|
struct nfs_open_context *ctx, struct nfs4_label *ilabel, |
|
struct nfs4_label *olabel) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
__u32 bitmask[NFS4_BITMASK_SZ]; |
|
struct nfs4_state *state = ctx ? ctx->state : NULL; |
|
struct nfs_setattrargs arg = { |
|
.fh = NFS_FH(inode), |
|
.iap = sattr, |
|
.server = server, |
|
.bitmask = bitmask, |
|
.label = ilabel, |
|
}; |
|
struct nfs_setattrres res = { |
|
.fattr = fattr, |
|
.label = olabel, |
|
.server = server, |
|
}; |
|
struct nfs4_exception exception = { |
|
.state = state, |
|
.inode = inode, |
|
.stateid = &arg.stateid, |
|
}; |
|
int err; |
|
|
|
do { |
|
nfs4_bitmap_copy_adjust_setattr(bitmask, |
|
nfs4_bitmask(server, olabel), |
|
inode); |
|
|
|
err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); |
|
switch (err) { |
|
case -NFS4ERR_OPENMODE: |
|
if (!(sattr->ia_valid & ATTR_SIZE)) { |
|
pr_warn_once("NFSv4: server %s is incorrectly " |
|
"applying open mode checks to " |
|
"a SETATTR that is not " |
|
"changing file size.\n", |
|
server->nfs_client->cl_hostname); |
|
} |
|
if (state && !(state->state & FMODE_WRITE)) { |
|
err = -EBADF; |
|
if (sattr->ia_valid & ATTR_OPEN) |
|
err = -EACCES; |
|
goto out; |
|
} |
|
} |
|
err = nfs4_handle_exception(server, err, &exception); |
|
} while (exception.retry); |
|
out: |
|
return err; |
|
} |
|
|
|
static bool |
|
nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) |
|
{ |
|
if (inode == NULL || !nfs_have_layout(inode)) |
|
return false; |
|
|
|
return pnfs_wait_on_layoutreturn(inode, task); |
|
} |
|
|
|
/* |
|
* Update the seqid of an open stateid |
|
*/ |
|
static void nfs4_sync_open_stateid(nfs4_stateid *dst, |
|
struct nfs4_state *state) |
|
{ |
|
__be32 seqid_open; |
|
u32 dst_seqid; |
|
int seq; |
|
|
|
for (;;) { |
|
if (!nfs4_valid_open_stateid(state)) |
|
break; |
|
seq = read_seqbegin(&state->seqlock); |
|
if (!nfs4_state_match_open_stateid_other(state, dst)) { |
|
nfs4_stateid_copy(dst, &state->open_stateid); |
|
if (read_seqretry(&state->seqlock, seq)) |
|
continue; |
|
break; |
|
} |
|
seqid_open = state->open_stateid.seqid; |
|
if (read_seqretry(&state->seqlock, seq)) |
|
continue; |
|
|
|
dst_seqid = be32_to_cpu(dst->seqid); |
|
if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0) |
|
dst->seqid = seqid_open; |
|
break; |
|
} |
|
} |
|
|
|
/* |
|
* Update the seqid of an open stateid after receiving |
|
* NFS4ERR_OLD_STATEID |
|
*/ |
|
static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst, |
|
struct nfs4_state *state) |
|
{ |
|
__be32 seqid_open; |
|
u32 dst_seqid; |
|
bool ret; |
|
int seq, status = -EAGAIN; |
|
DEFINE_WAIT(wait); |
|
|
|
for (;;) { |
|
ret = false; |
|
if (!nfs4_valid_open_stateid(state)) |
|
break; |
|
seq = read_seqbegin(&state->seqlock); |
|
if (!nfs4_state_match_open_stateid_other(state, dst)) { |
|
if (read_seqretry(&state->seqlock, seq)) |
|
continue; |
|
break; |
|
} |
|
|
|
write_seqlock(&state->seqlock); |
|
seqid_open = state->open_stateid.seqid; |
|
|
|
dst_seqid = be32_to_cpu(dst->seqid); |
|
|
|
/* Did another OPEN bump the state's seqid? try again: */ |
|
if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) { |
|
dst->seqid = seqid_open; |
|
write_sequnlock(&state->seqlock); |
|
ret = true; |
|
break; |
|
} |
|
|
|
/* server says we're behind but we haven't seen the update yet */ |
|
set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); |
|
prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); |
|
write_sequnlock(&state->seqlock); |
|
trace_nfs4_close_stateid_update_wait(state->inode, dst, 0); |
|
|
|
if (fatal_signal_pending(current)) |
|
status = -EINTR; |
|
else |
|
if (schedule_timeout(5*HZ) != 0) |
|
status = 0; |
|
|
|
finish_wait(&state->waitq, &wait); |
|
|
|
if (!status) |
|
continue; |
|
if (status == -EINTR) |
|
break; |
|
|
|
/* we slept the whole 5 seconds, we must have lost a seqid */ |
|
dst->seqid = cpu_to_be32(dst_seqid + 1); |
|
ret = true; |
|
break; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
struct nfs4_closedata { |
|
struct inode *inode; |
|
struct nfs4_state *state; |
|
struct nfs_closeargs arg; |
|
struct nfs_closeres res; |
|
struct { |
|
struct nfs4_layoutreturn_args arg; |
|
struct nfs4_layoutreturn_res res; |
|
struct nfs4_xdr_opaque_data ld_private; |
|
u32 roc_barrier; |
|
bool roc; |
|
} lr; |
|
struct nfs_fattr fattr; |
|
unsigned long timestamp; |
|
}; |
|
|
|
static void nfs4_free_closedata(void *data) |
|
{ |
|
struct nfs4_closedata *calldata = data; |
|
struct nfs4_state_owner *sp = calldata->state->owner; |
|
struct super_block *sb = calldata->state->inode->i_sb; |
|
|
|
if (calldata->lr.roc) |
|
pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, |
|
calldata->res.lr_ret); |
|
nfs4_put_open_state(calldata->state); |
|
nfs_free_seqid(calldata->arg.seqid); |
|
nfs4_put_state_owner(sp); |
|
nfs_sb_deactive(sb); |
|
kfree(calldata); |
|
} |
|
|
|
static void nfs4_close_done(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs4_closedata *calldata = data; |
|
struct nfs4_state *state = calldata->state; |
|
struct nfs_server *server = NFS_SERVER(calldata->inode); |
|
nfs4_stateid *res_stateid = NULL; |
|
struct nfs4_exception exception = { |
|
.state = state, |
|
.inode = calldata->inode, |
|
.stateid = &calldata->arg.stateid, |
|
}; |
|
|
|
dprintk("%s: begin!\n", __func__); |
|
if (!nfs4_sequence_done(task, &calldata->res.seq_res)) |
|
return; |
|
trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); |
|
|
|
/* Handle Layoutreturn errors */ |
|
if (pnfs_roc_done(task, &calldata->arg.lr_args, &calldata->res.lr_res, |
|
&calldata->res.lr_ret) == -EAGAIN) |
|
goto out_restart; |
|
|
|
/* hmm. we are done with the inode, and in the process of freeing |
|
* the state_owner. we keep this around to process errors |
|
*/ |
|
switch (task->tk_status) { |
|
case 0: |
|
res_stateid = &calldata->res.stateid; |
|
renew_lease(server, calldata->timestamp); |
|
break; |
|
case -NFS4ERR_ACCESS: |
|
if (calldata->arg.bitmask != NULL) { |
|
calldata->arg.bitmask = NULL; |
|
calldata->res.fattr = NULL; |
|
goto out_restart; |
|
|
|
} |
|
break; |
|
case -NFS4ERR_OLD_STATEID: |
|
/* Did we race with OPEN? */ |
|
if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid, |
|
state)) |
|
goto out_restart; |
|
goto out_release; |
|
case -NFS4ERR_ADMIN_REVOKED: |
|
case -NFS4ERR_STALE_STATEID: |
|
case -NFS4ERR_EXPIRED: |
|
nfs4_free_revoked_stateid(server, |
|
&calldata->arg.stateid, |
|
task->tk_msg.rpc_cred); |
|
fallthrough; |
|
case -NFS4ERR_BAD_STATEID: |
|
if (calldata->arg.fmode == 0) |
|
break; |
|
fallthrough; |
|
default: |
|
task->tk_status = nfs4_async_handle_exception(task, |
|
server, task->tk_status, &exception); |
|
if (exception.retry) |
|
goto out_restart; |
|
} |
|
nfs_clear_open_stateid(state, &calldata->arg.stateid, |
|
res_stateid, calldata->arg.fmode); |
|
out_release: |
|
task->tk_status = 0; |
|
nfs_release_seqid(calldata->arg.seqid); |
|
nfs_refresh_inode(calldata->inode, &calldata->fattr); |
|
dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); |
|
return; |
|
out_restart: |
|
task->tk_status = 0; |
|
rpc_restart_call_prepare(task); |
|
goto out_release; |
|
} |
|
|
|
static void nfs4_close_prepare(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs4_closedata *calldata = data; |
|
struct nfs4_state *state = calldata->state; |
|
struct inode *inode = calldata->inode; |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
struct pnfs_layout_hdr *lo; |
|
bool is_rdonly, is_wronly, is_rdwr; |
|
int call_close = 0; |
|
|
|
dprintk("%s: begin!\n", __func__); |
|
if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
|
goto out_wait; |
|
|
|
task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
|
spin_lock(&state->owner->so_lock); |
|
is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); |
|
is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); |
|
is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); |
|
/* Calculate the change in open mode */ |
|
calldata->arg.fmode = 0; |
|
if (state->n_rdwr == 0) { |
|
if (state->n_rdonly == 0) |
|
call_close |= is_rdonly; |
|
else if (is_rdonly) |
|
calldata->arg.fmode |= FMODE_READ; |
|
if (state->n_wronly == 0) |
|
call_close |= is_wronly; |
|
else if (is_wronly) |
|
calldata->arg.fmode |= FMODE_WRITE; |
|
if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) |
|
call_close |= is_rdwr; |
|
} else if (is_rdwr) |
|
calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; |
|
|
|
nfs4_sync_open_stateid(&calldata->arg.stateid, state); |
|
if (!nfs4_valid_open_stateid(state)) |
|
call_close = 0; |
|
spin_unlock(&state->owner->so_lock); |
|
|
|
if (!call_close) { |
|
/* Note: exit _without_ calling nfs4_close_done */ |
|
goto out_no_action; |
|
} |
|
|
|
if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { |
|
nfs_release_seqid(calldata->arg.seqid); |
|
goto out_wait; |
|
} |
|
|
|
lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; |
|
if (lo && !pnfs_layout_is_valid(lo)) { |
|
calldata->arg.lr_args = NULL; |
|
calldata->res.lr_res = NULL; |
|
} |
|
|
|
if (calldata->arg.fmode == 0) |
|
task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; |
|
|
|
if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { |
|
/* Close-to-open cache consistency revalidation */ |
|
if (!nfs4_have_delegation(inode, FMODE_READ)) { |
|
nfs4_bitmask_set(calldata->arg.bitmask_store, |
|
server->cache_consistency_bitmask, |
|
inode, server, NULL); |
|
calldata->arg.bitmask = calldata->arg.bitmask_store; |
|
} else |
|
calldata->arg.bitmask = NULL; |
|
} |
|
|
|
calldata->arg.share_access = |
|
nfs4_map_atomic_open_share(NFS_SERVER(inode), |
|
calldata->arg.fmode, 0); |
|
|
|
if (calldata->res.fattr == NULL) |
|
calldata->arg.bitmask = NULL; |
|
else if (calldata->arg.bitmask == NULL) |
|
calldata->res.fattr = NULL; |
|
calldata->timestamp = jiffies; |
|
if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, |
|
&calldata->arg.seq_args, |
|
&calldata->res.seq_res, |
|
task) != 0) |
|
nfs_release_seqid(calldata->arg.seqid); |
|
dprintk("%s: done!\n", __func__); |
|
return; |
|
out_no_action: |
|
task->tk_action = NULL; |
|
out_wait: |
|
nfs4_sequence_done(task, &calldata->res.seq_res); |
|
} |
|
|
|
static const struct rpc_call_ops nfs4_close_ops = { |
|
.rpc_call_prepare = nfs4_close_prepare, |
|
.rpc_call_done = nfs4_close_done, |
|
.rpc_release = nfs4_free_closedata, |
|
}; |
|
|
|
/* |
|
* It is possible for data to be read/written from a mem-mapped file |
|
* after the sys_close call (which hits the vfs layer as a flush). |
|
* This means that we can't safely call nfsv4 close on a file until |
|
* the inode is cleared. This in turn means that we are not good |
|
* NFSv4 citizens - we do not indicate to the server to update the file's |
|
* share state even when we are done with one of the three share |
|
* stateid's in the inode. |
|
* |
|
* NOTE: Caller must be holding the sp->so_owner semaphore! |
|
*/ |
|
int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(state->inode); |
|
struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); |
|
struct nfs4_closedata *calldata; |
|
struct nfs4_state_owner *sp = state->owner; |
|
struct rpc_task *task; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], |
|
.rpc_cred = state->owner->so_cred, |
|
}; |
|
struct rpc_task_setup task_setup_data = { |
|
.rpc_client = server->client, |
|
.rpc_message = &msg, |
|
.callback_ops = &nfs4_close_ops, |
|
.workqueue = nfsiod_workqueue, |
|
.flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, |
|
}; |
|
int status = -ENOMEM; |
|
|
|
nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, |
|
&task_setup_data.rpc_client, &msg); |
|
|
|
calldata = kzalloc(sizeof(*calldata), gfp_mask); |
|
if (calldata == NULL) |
|
goto out; |
|
nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); |
|
calldata->inode = state->inode; |
|
calldata->state = state; |
|
calldata->arg.fh = NFS_FH(state->inode); |
|
if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) |
|
goto out_free_calldata; |
|
/* Serialization for the sequence id */ |
|
alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; |
|
calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); |
|
if (IS_ERR(calldata->arg.seqid)) |
|
goto out_free_calldata; |
|
nfs_fattr_init(&calldata->fattr); |
|
calldata->arg.fmode = 0; |
|
calldata->lr.arg.ld_private = &calldata->lr.ld_private; |
|
calldata->res.fattr = &calldata->fattr; |
|
calldata->res.seqid = calldata->arg.seqid; |
|
calldata->res.server = server; |
|
calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; |
|
calldata->lr.roc = pnfs_roc(state->inode, |
|
&calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); |
|
if (calldata->lr.roc) { |
|
calldata->arg.lr_args = &calldata->lr.arg; |
|
calldata->res.lr_res = &calldata->lr.res; |
|
} |
|
nfs_sb_active(calldata->inode->i_sb); |
|
|
|
msg.rpc_argp = &calldata->arg; |
|
msg.rpc_resp = &calldata->res; |
|
task_setup_data.callback_data = calldata; |
|
task = rpc_run_task(&task_setup_data); |
|
if (IS_ERR(task)) |
|
return PTR_ERR(task); |
|
status = 0; |
|
if (wait) |
|
status = rpc_wait_for_completion_task(task); |
|
rpc_put_task(task); |
|
return status; |
|
out_free_calldata: |
|
kfree(calldata); |
|
out: |
|
nfs4_put_open_state(state); |
|
nfs4_put_state_owner(sp); |
|
return status; |
|
} |
|
|
|
static struct inode * |
|
nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, |
|
int open_flags, struct iattr *attr, int *opened) |
|
{ |
|
struct nfs4_state *state; |
|
struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; |
|
|
|
label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); |
|
|
|
/* Protect against concurrent sillydeletes */ |
|
state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); |
|
|
|
nfs4_label_release_security(label); |
|
|
|
if (IS_ERR(state)) |
|
return ERR_CAST(state); |
|
return state->inode; |
|
} |
|
|
|
static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) |
|
{ |
|
if (ctx->state == NULL) |
|
return; |
|
if (is_sync) |
|
nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx)); |
|
else |
|
nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx)); |
|
} |
|
|
|
#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) |
|
#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) |
|
#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_XATTR_SUPPORT - 1UL) |
|
|
|
static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
|
{ |
|
u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; |
|
struct nfs4_server_caps_arg args = { |
|
.fhandle = fhandle, |
|
.bitmask = bitmask, |
|
}; |
|
struct nfs4_server_caps_res res = {}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
}; |
|
int status; |
|
int i; |
|
|
|
bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | |
|
FATTR4_WORD0_FH_EXPIRE_TYPE | |
|
FATTR4_WORD0_LINK_SUPPORT | |
|
FATTR4_WORD0_SYMLINK_SUPPORT | |
|
FATTR4_WORD0_ACLSUPPORT; |
|
if (minorversion) |
|
bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; |
|
|
|
status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
|
if (status == 0) { |
|
/* Sanity check the server answers */ |
|
switch (minorversion) { |
|
case 0: |
|
res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; |
|
res.attr_bitmask[2] = 0; |
|
break; |
|
case 1: |
|
res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; |
|
break; |
|
case 2: |
|
res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; |
|
} |
|
memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); |
|
server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| |
|
NFS_CAP_SYMLINKS|NFS_CAP_FILEID| |
|
NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| |
|
NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| |
|
NFS_CAP_CTIME|NFS_CAP_MTIME| |
|
NFS_CAP_SECURITY_LABEL); |
|
if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && |
|
res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) |
|
server->caps |= NFS_CAP_ACLS; |
|
if (res.has_links != 0) |
|
server->caps |= NFS_CAP_HARDLINKS; |
|
if (res.has_symlinks != 0) |
|
server->caps |= NFS_CAP_SYMLINKS; |
|
if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) |
|
server->caps |= NFS_CAP_FILEID; |
|
if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) |
|
server->caps |= NFS_CAP_MODE; |
|
if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) |
|
server->caps |= NFS_CAP_NLINK; |
|
if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) |
|
server->caps |= NFS_CAP_OWNER; |
|
if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) |
|
server->caps |= NFS_CAP_OWNER_GROUP; |
|
if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) |
|
server->caps |= NFS_CAP_ATIME; |
|
if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) |
|
server->caps |= NFS_CAP_CTIME; |
|
if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) |
|
server->caps |= NFS_CAP_MTIME; |
|
#ifdef CONFIG_NFS_V4_SECURITY_LABEL |
|
if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) |
|
server->caps |= NFS_CAP_SECURITY_LABEL; |
|
#endif |
|
memcpy(server->attr_bitmask_nl, res.attr_bitmask, |
|
sizeof(server->attr_bitmask)); |
|
server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; |
|
|
|
memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); |
|
server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; |
|
server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; |
|
server->cache_consistency_bitmask[2] = 0; |
|
|
|
/* Avoid a regression due to buggy server */ |
|
for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) |
|
res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; |
|
memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, |
|
sizeof(server->exclcreat_bitmask)); |
|
|
|
server->acl_bitmask = res.acl_bitmask; |
|
server->fh_expire_type = res.fh_expire_type; |
|
} |
|
|
|
return status; |
|
} |
|
|
|
int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int err; |
|
do { |
|
err = nfs4_handle_exception(server, |
|
_nfs4_server_capabilities(server, fhandle), |
|
&exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, |
|
struct nfs_fsinfo *info) |
|
{ |
|
u32 bitmask[3]; |
|
struct nfs4_lookup_root_arg args = { |
|
.bitmask = bitmask, |
|
}; |
|
struct nfs4_lookup_res res = { |
|
.server = server, |
|
.fattr = info->fattr, |
|
.fh = fhandle, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
}; |
|
|
|
bitmask[0] = nfs4_fattr_bitmap[0]; |
|
bitmask[1] = nfs4_fattr_bitmap[1]; |
|
/* |
|
* Process the label in the upcoming getfattr |
|
*/ |
|
bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; |
|
|
|
nfs_fattr_init(info->fattr); |
|
return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
|
} |
|
|
|
static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, |
|
struct nfs_fsinfo *info) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int err; |
|
do { |
|
err = _nfs4_lookup_root(server, fhandle, info); |
|
trace_nfs4_lookup_root(server, fhandle, info->fattr, err); |
|
switch (err) { |
|
case 0: |
|
case -NFS4ERR_WRONGSEC: |
|
goto out; |
|
default: |
|
err = nfs4_handle_exception(server, err, &exception); |
|
} |
|
} while (exception.retry); |
|
out: |
|
return err; |
|
} |
|
|
|
static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, |
|
struct nfs_fsinfo *info, rpc_authflavor_t flavor) |
|
{ |
|
struct rpc_auth_create_args auth_args = { |
|
.pseudoflavor = flavor, |
|
}; |
|
struct rpc_auth *auth; |
|
|
|
auth = rpcauth_create(&auth_args, server->client); |
|
if (IS_ERR(auth)) |
|
return -EACCES; |
|
return nfs4_lookup_root(server, fhandle, info); |
|
} |
|
|
|
/* |
|
* Retry pseudoroot lookup with various security flavors. We do this when: |
|
* |
|
* NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC |
|
* NFSv4.1: the server does not support the SECINFO_NO_NAME operation |
|
* |
|
* Returns zero on success, or a negative NFS4ERR value, or a |
|
* negative errno value. |
|
*/ |
|
static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, |
|
struct nfs_fsinfo *info) |
|
{ |
|
/* Per 3530bis 15.33.5 */ |
|
static const rpc_authflavor_t flav_array[] = { |
|
RPC_AUTH_GSS_KRB5P, |
|
RPC_AUTH_GSS_KRB5I, |
|
RPC_AUTH_GSS_KRB5, |
|
RPC_AUTH_UNIX, /* courtesy */ |
|
RPC_AUTH_NULL, |
|
}; |
|
int status = -EPERM; |
|
size_t i; |
|
|
|
if (server->auth_info.flavor_len > 0) { |
|
/* try each flavor specified by user */ |
|
for (i = 0; i < server->auth_info.flavor_len; i++) { |
|
status = nfs4_lookup_root_sec(server, fhandle, info, |
|
server->auth_info.flavors[i]); |
|
if (status == -NFS4ERR_WRONGSEC || status == -EACCES) |
|
continue; |
|
break; |
|
} |
|
} else { |
|
/* no flavors specified by user, try default list */ |
|
for (i = 0; i < ARRAY_SIZE(flav_array); i++) { |
|
status = nfs4_lookup_root_sec(server, fhandle, info, |
|
flav_array[i]); |
|
if (status == -NFS4ERR_WRONGSEC || status == -EACCES) |
|
continue; |
|
break; |
|
} |
|
} |
|
|
|
/* |
|
* -EACCES could mean that the user doesn't have correct permissions |
|
* to access the mount. It could also mean that we tried to mount |
|
* with a gss auth flavor, but rpc.gssd isn't running. Either way, |
|
* existing mount programs don't handle -EACCES very well so it should |
|
* be mapped to -EPERM instead. |
|
*/ |
|
if (status == -EACCES) |
|
status = -EPERM; |
|
return status; |
|
} |
|
|
|
/** |
|
* nfs4_proc_get_rootfh - get file handle for server's pseudoroot |
|
* @server: initialized nfs_server handle |
|
* @fhandle: we fill in the pseudo-fs root file handle |
|
* @info: we fill in an FSINFO struct |
|
* @auth_probe: probe the auth flavours |
|
* |
|
* Returns zero on success, or a negative errno. |
|
*/ |
|
int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, |
|
struct nfs_fsinfo *info, |
|
bool auth_probe) |
|
{ |
|
int status = 0; |
|
|
|
if (!auth_probe) |
|
status = nfs4_lookup_root(server, fhandle, info); |
|
|
|
if (auth_probe || status == NFS4ERR_WRONGSEC) |
|
status = server->nfs_client->cl_mvops->find_root_sec(server, |
|
fhandle, info); |
|
|
|
if (status == 0) |
|
status = nfs4_server_capabilities(server, fhandle); |
|
if (status == 0) |
|
status = nfs4_do_fsinfo(server, fhandle, info); |
|
|
|
return nfs4_map_errors(status); |
|
} |
|
|
|
static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, |
|
struct nfs_fsinfo *info) |
|
{ |
|
int error; |
|
struct nfs_fattr *fattr = info->fattr; |
|
struct nfs4_label *label = fattr->label; |
|
|
|
error = nfs4_server_capabilities(server, mntfh); |
|
if (error < 0) { |
|
dprintk("nfs4_get_root: getcaps error = %d\n", -error); |
|
return error; |
|
} |
|
|
|
error = nfs4_proc_getattr(server, mntfh, fattr, label, NULL); |
|
if (error < 0) { |
|
dprintk("nfs4_get_root: getattr error = %d\n", -error); |
|
goto out; |
|
} |
|
|
|
if (fattr->valid & NFS_ATTR_FATTR_FSID && |
|
!nfs_fsid_equal(&server->fsid, &fattr->fsid)) |
|
memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); |
|
|
|
out: |
|
return error; |
|
} |
|
|
|
/* |
|
* Get locations and (maybe) other attributes of a referral. |
|
* Note that we'll actually follow the referral later when |
|
* we detect fsid mismatch in inode revalidation |
|
*/ |
|
static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, |
|
const struct qstr *name, struct nfs_fattr *fattr, |
|
struct nfs_fh *fhandle) |
|
{ |
|
int status = -ENOMEM; |
|
struct page *page = NULL; |
|
struct nfs4_fs_locations *locations = NULL; |
|
|
|
page = alloc_page(GFP_KERNEL); |
|
if (page == NULL) |
|
goto out; |
|
locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); |
|
if (locations == NULL) |
|
goto out; |
|
|
|
status = nfs4_proc_fs_locations(client, dir, name, locations, page); |
|
if (status != 0) |
|
goto out; |
|
|
|
/* |
|
* If the fsid didn't change, this is a migration event, not a |
|
* referral. Cause us to drop into the exception handler, which |
|
* will kick off migration recovery. |
|
*/ |
|
if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { |
|
dprintk("%s: server did not return a different fsid for" |
|
" a referral at %s\n", __func__, name->name); |
|
status = -NFS4ERR_MOVED; |
|
goto out; |
|
} |
|
/* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ |
|
nfs_fixup_referral_attributes(&locations->fattr); |
|
|
|
/* replace the lookup nfs_fattr with the locations nfs_fattr */ |
|
memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); |
|
memset(fhandle, 0, sizeof(struct nfs_fh)); |
|
out: |
|
if (page) |
|
__free_page(page); |
|
kfree(locations); |
|
return status; |
|
} |
|
|
|
static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, |
|
struct nfs_fattr *fattr, struct nfs4_label *label, |
|
struct inode *inode) |
|
{ |
|
__u32 bitmask[NFS4_BITMASK_SZ]; |
|
struct nfs4_getattr_arg args = { |
|
.fh = fhandle, |
|
.bitmask = bitmask, |
|
}; |
|
struct nfs4_getattr_res res = { |
|
.fattr = fattr, |
|
.label = label, |
|
.server = server, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
}; |
|
unsigned short task_flags = 0; |
|
|
|
/* Is this is an attribute revalidation, subject to softreval? */ |
|
if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) |
|
task_flags |= RPC_TASK_TIMEOUT; |
|
|
|
nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode); |
|
|
|
nfs_fattr_init(fattr); |
|
nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); |
|
return nfs4_do_call_sync(server->client, server, &msg, |
|
&args.seq_args, &res.seq_res, task_flags); |
|
} |
|
|
|
int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, |
|
struct nfs_fattr *fattr, struct nfs4_label *label, |
|
struct inode *inode) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int err; |
|
do { |
|
err = _nfs4_proc_getattr(server, fhandle, fattr, label, inode); |
|
trace_nfs4_getattr(server, fhandle, fattr, err); |
|
err = nfs4_handle_exception(server, err, |
|
&exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
/* |
|
* The file is not closed if it is opened due to the a request to change |
|
* the size of the file. The open call will not be needed once the |
|
* VFS layer lookup-intents are implemented. |
|
* |
|
* Close is called when the inode is destroyed. |
|
* If we haven't opened the file for O_WRONLY, we |
|
* need to in the size_change case to obtain a stateid. |
|
* |
|
* Got race? |
|
* Because OPEN is always done by name in nfsv4, it is |
|
* possible that we opened a different file by the same |
|
* name. We can recognize this race condition, but we |
|
* can't do anything about it besides returning an error. |
|
* |
|
* This will be fixed with VFS changes (lookup-intent). |
|
*/ |
|
static int |
|
nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, |
|
struct iattr *sattr) |
|
{ |
|
struct inode *inode = d_inode(dentry); |
|
const struct cred *cred = NULL; |
|
struct nfs_open_context *ctx = NULL; |
|
struct nfs4_label *label = NULL; |
|
int status; |
|
|
|
if (pnfs_ld_layoutret_on_setattr(inode) && |
|
sattr->ia_valid & ATTR_SIZE && |
|
sattr->ia_size < i_size_read(inode)) |
|
pnfs_commit_and_return_layout(inode); |
|
|
|
nfs_fattr_init(fattr); |
|
|
|
/* Deal with open(O_TRUNC) */ |
|
if (sattr->ia_valid & ATTR_OPEN) |
|
sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); |
|
|
|
/* Optimization: if the end result is no change, don't RPC */ |
|
if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
|
return 0; |
|
|
|
/* Search for an existing open(O_WRITE) file */ |
|
if (sattr->ia_valid & ATTR_FILE) { |
|
|
|
ctx = nfs_file_open_context(sattr->ia_file); |
|
if (ctx) |
|
cred = ctx->cred; |
|
} |
|
|
|
label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); |
|
if (IS_ERR(label)) |
|
return PTR_ERR(label); |
|
|
|
/* Return any delegations if we're going to change ACLs */ |
|
if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) |
|
nfs4_inode_make_writeable(inode); |
|
|
|
status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label); |
|
if (status == 0) { |
|
nfs_setattr_update_inode(inode, sattr, fattr); |
|
nfs_setsecurity(inode, fattr, label); |
|
} |
|
nfs4_label_free(label); |
|
return status; |
|
} |
|
|
|
static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, |
|
struct dentry *dentry, struct nfs_fh *fhandle, |
|
struct nfs_fattr *fattr, struct nfs4_label *label) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(dir); |
|
int status; |
|
struct nfs4_lookup_arg args = { |
|
.bitmask = server->attr_bitmask, |
|
.dir_fh = NFS_FH(dir), |
|
.name = &dentry->d_name, |
|
}; |
|
struct nfs4_lookup_res res = { |
|
.server = server, |
|
.fattr = fattr, |
|
.label = label, |
|
.fh = fhandle, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
}; |
|
unsigned short task_flags = 0; |
|
|
|
/* Is this is an attribute revalidation, subject to softreval? */ |
|
if (nfs_lookup_is_soft_revalidate(dentry)) |
|
task_flags |= RPC_TASK_TIMEOUT; |
|
|
|
args.bitmask = nfs4_bitmask(server, label); |
|
|
|
nfs_fattr_init(fattr); |
|
|
|
dprintk("NFS call lookup %pd2\n", dentry); |
|
nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); |
|
status = nfs4_do_call_sync(clnt, server, &msg, |
|
&args.seq_args, &res.seq_res, task_flags); |
|
dprintk("NFS reply lookup: %d\n", status); |
|
return status; |
|
} |
|
|
|
static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) |
|
{ |
|
fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | |
|
NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; |
|
fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
|
fattr->nlink = 2; |
|
} |
|
|
|
static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, |
|
struct dentry *dentry, struct nfs_fh *fhandle, |
|
struct nfs_fattr *fattr, struct nfs4_label *label) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
struct rpc_clnt *client = *clnt; |
|
const struct qstr *name = &dentry->d_name; |
|
int err; |
|
do { |
|
err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr, label); |
|
trace_nfs4_lookup(dir, name, err); |
|
switch (err) { |
|
case -NFS4ERR_BADNAME: |
|
err = -ENOENT; |
|
goto out; |
|
case -NFS4ERR_MOVED: |
|
err = nfs4_get_referral(client, dir, name, fattr, fhandle); |
|
if (err == -NFS4ERR_MOVED) |
|
err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); |
|
goto out; |
|
case -NFS4ERR_WRONGSEC: |
|
err = -EPERM; |
|
if (client != *clnt) |
|
goto out; |
|
client = nfs4_negotiate_security(client, dir, name); |
|
if (IS_ERR(client)) |
|
return PTR_ERR(client); |
|
|
|
exception.retry = 1; |
|
break; |
|
default: |
|
err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); |
|
} |
|
} while (exception.retry); |
|
|
|
out: |
|
if (err == 0) |
|
*clnt = client; |
|
else if (client != *clnt) |
|
rpc_shutdown_client(client); |
|
|
|
return err; |
|
} |
|
|
|
static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry, |
|
struct nfs_fh *fhandle, struct nfs_fattr *fattr, |
|
struct nfs4_label *label) |
|
{ |
|
int status; |
|
struct rpc_clnt *client = NFS_CLIENT(dir); |
|
|
|
status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, label); |
|
if (client != NFS_CLIENT(dir)) { |
|
rpc_shutdown_client(client); |
|
nfs_fixup_secinfo_attributes(fattr); |
|
} |
|
return status; |
|
} |
|
|
|
struct rpc_clnt * |
|
nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry, |
|
struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
|
{ |
|
struct rpc_clnt *client = NFS_CLIENT(dir); |
|
int status; |
|
|
|
status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, NULL); |
|
if (status < 0) |
|
return ERR_PTR(status); |
|
return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; |
|
} |
|
|
|
static int _nfs4_proc_lookupp(struct inode *inode, |
|
struct nfs_fh *fhandle, struct nfs_fattr *fattr, |
|
struct nfs4_label *label) |
|
{ |
|
struct rpc_clnt *clnt = NFS_CLIENT(inode); |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
int status; |
|
struct nfs4_lookupp_arg args = { |
|
.bitmask = server->attr_bitmask, |
|
.fh = NFS_FH(inode), |
|
}; |
|
struct nfs4_lookupp_res res = { |
|
.server = server, |
|
.fattr = fattr, |
|
.label = label, |
|
.fh = fhandle, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
}; |
|
|
|
args.bitmask = nfs4_bitmask(server, label); |
|
|
|
nfs_fattr_init(fattr); |
|
|
|
dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); |
|
status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, |
|
&res.seq_res, 0); |
|
dprintk("NFS reply lookupp: %d\n", status); |
|
return status; |
|
} |
|
|
|
static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, |
|
struct nfs_fattr *fattr, struct nfs4_label *label) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int err; |
|
do { |
|
err = _nfs4_proc_lookupp(inode, fhandle, fattr, label); |
|
trace_nfs4_lookupp(inode, err); |
|
err = nfs4_handle_exception(NFS_SERVER(inode), err, |
|
&exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
struct nfs4_accessargs args = { |
|
.fh = NFS_FH(inode), |
|
.access = entry->mask, |
|
}; |
|
struct nfs4_accessres res = { |
|
.server = server, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
.rpc_cred = entry->cred, |
|
}; |
|
int status = 0; |
|
|
|
if (!nfs4_have_delegation(inode, FMODE_READ)) { |
|
res.fattr = nfs_alloc_fattr(); |
|
if (res.fattr == NULL) |
|
return -ENOMEM; |
|
args.bitmask = server->cache_consistency_bitmask; |
|
} |
|
status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
|
if (!status) { |
|
nfs_access_set_mask(entry, res.access); |
|
if (res.fattr) |
|
nfs_refresh_inode(inode, res.fattr); |
|
} |
|
nfs_free_fattr(res.fattr); |
|
return status; |
|
} |
|
|
|
static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int err; |
|
do { |
|
err = _nfs4_proc_access(inode, entry); |
|
trace_nfs4_access(inode, err); |
|
err = nfs4_handle_exception(NFS_SERVER(inode), err, |
|
&exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
/* |
|
* TODO: For the time being, we don't try to get any attributes |
|
* along with any of the zero-copy operations READ, READDIR, |
|
* READLINK, WRITE. |
|
* |
|
* In the case of the first three, we want to put the GETATTR |
|
* after the read-type operation -- this is because it is hard |
|
* to predict the length of a GETATTR response in v4, and thus |
|
* align the READ data correctly. This means that the GETATTR |
|
* may end up partially falling into the page cache, and we should |
|
* shift it into the 'tail' of the xdr_buf before processing. |
|
* To do this efficiently, we need to know the total length |
|
* of data received, which doesn't seem to be available outside |
|
* of the RPC layer. |
|
* |
|
* In the case of WRITE, we also want to put the GETATTR after |
|
* the operation -- in this case because we want to make sure |
|
* we get the post-operation mtime and size. |
|
* |
|
* Both of these changes to the XDR layer would in fact be quite |
|
* minor, but I decided to leave them for a subsequent patch. |
|
*/ |
|
static int _nfs4_proc_readlink(struct inode *inode, struct page *page, |
|
unsigned int pgbase, unsigned int pglen) |
|
{ |
|
struct nfs4_readlink args = { |
|
.fh = NFS_FH(inode), |
|
.pgbase = pgbase, |
|
.pglen = pglen, |
|
.pages = &page, |
|
}; |
|
struct nfs4_readlink_res res; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
}; |
|
|
|
return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); |
|
} |
|
|
|
static int nfs4_proc_readlink(struct inode *inode, struct page *page, |
|
unsigned int pgbase, unsigned int pglen) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int err; |
|
do { |
|
err = _nfs4_proc_readlink(inode, page, pgbase, pglen); |
|
trace_nfs4_readlink(inode, err); |
|
err = nfs4_handle_exception(NFS_SERVER(inode), err, |
|
&exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
/* |
|
* This is just for mknod. open(O_CREAT) will always do ->open_context(). |
|
*/ |
|
static int |
|
nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
|
int flags) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(dir); |
|
struct nfs4_label l, *ilabel = NULL; |
|
struct nfs_open_context *ctx; |
|
struct nfs4_state *state; |
|
int status = 0; |
|
|
|
ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); |
|
if (IS_ERR(ctx)) |
|
return PTR_ERR(ctx); |
|
|
|
ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); |
|
|
|
if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) |
|
sattr->ia_mode &= ~current_umask(); |
|
state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); |
|
if (IS_ERR(state)) { |
|
status = PTR_ERR(state); |
|
goto out; |
|
} |
|
out: |
|
nfs4_label_release_security(ilabel); |
|
put_nfs_open_context(ctx); |
|
return status; |
|
} |
|
|
|
static int |
|
_nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(dir); |
|
struct nfs_removeargs args = { |
|
.fh = NFS_FH(dir), |
|
.name = *name, |
|
}; |
|
struct nfs_removeres res = { |
|
.server = server, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
}; |
|
unsigned long timestamp = jiffies; |
|
int status; |
|
|
|
status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); |
|
if (status == 0) { |
|
spin_lock(&dir->i_lock); |
|
nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp, |
|
NFS_INO_INVALID_DATA); |
|
/* Removing a directory decrements nlink in the parent */ |
|
if (ftype == NF4DIR && dir->i_nlink > 2) |
|
nfs4_dec_nlink_locked(dir); |
|
spin_unlock(&dir->i_lock); |
|
} |
|
return status; |
|
} |
|
|
|
static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
struct inode *inode = d_inode(dentry); |
|
int err; |
|
|
|
if (inode) { |
|
if (inode->i_nlink == 1) |
|
nfs4_inode_return_delegation(inode); |
|
else |
|
nfs4_inode_make_writeable(inode); |
|
} |
|
do { |
|
err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); |
|
trace_nfs4_remove(dir, &dentry->d_name, err); |
|
err = nfs4_handle_exception(NFS_SERVER(dir), err, |
|
&exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int err; |
|
|
|
do { |
|
err = _nfs4_proc_remove(dir, name, NF4DIR); |
|
trace_nfs4_remove(dir, name, err); |
|
err = nfs4_handle_exception(NFS_SERVER(dir), err, |
|
&exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
static void nfs4_proc_unlink_setup(struct rpc_message *msg, |
|
struct dentry *dentry, |
|
struct inode *inode) |
|
{ |
|
struct nfs_removeargs *args = msg->rpc_argp; |
|
struct nfs_removeres *res = msg->rpc_resp; |
|
|
|
res->server = NFS_SB(dentry->d_sb); |
|
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; |
|
nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); |
|
|
|
nfs_fattr_init(res->dir_attr); |
|
|
|
if (inode) |
|
nfs4_inode_return_delegation(inode); |
|
} |
|
|
|
static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) |
|
{ |
|
nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, |
|
&data->args.seq_args, |
|
&data->res.seq_res, |
|
task); |
|
} |
|
|
|
static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
|
{ |
|
struct nfs_unlinkdata *data = task->tk_calldata; |
|
struct nfs_removeres *res = &data->res; |
|
|
|
if (!nfs4_sequence_done(task, &res->seq_res)) |
|
return 0; |
|
if (nfs4_async_handle_error(task, res->server, NULL, |
|
&data->timeout) == -EAGAIN) |
|
return 0; |
|
if (task->tk_status == 0) |
|
nfs4_update_changeattr(dir, &res->cinfo, |
|
res->dir_attr->time_start, |
|
NFS_INO_INVALID_DATA); |
|
return 1; |
|
} |
|
|
|
static void nfs4_proc_rename_setup(struct rpc_message *msg, |
|
struct dentry *old_dentry, |
|
struct dentry *new_dentry) |
|
{ |
|
struct nfs_renameargs *arg = msg->rpc_argp; |
|
struct nfs_renameres *res = msg->rpc_resp; |
|
struct inode *old_inode = d_inode(old_dentry); |
|
struct inode *new_inode = d_inode(new_dentry); |
|
|
|
if (old_inode) |
|
nfs4_inode_make_writeable(old_inode); |
|
if (new_inode) |
|
nfs4_inode_return_delegation(new_inode); |
|
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; |
|
res->server = NFS_SB(old_dentry->d_sb); |
|
nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); |
|
} |
|
|
|
static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) |
|
{ |
|
nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, |
|
&data->args.seq_args, |
|
&data->res.seq_res, |
|
task); |
|
} |
|
|
|
static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, |
|
struct inode *new_dir) |
|
{ |
|
struct nfs_renamedata *data = task->tk_calldata; |
|
struct nfs_renameres *res = &data->res; |
|
|
|
if (!nfs4_sequence_done(task, &res->seq_res)) |
|
return 0; |
|
if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) |
|
return 0; |
|
|
|
if (task->tk_status == 0) { |
|
if (new_dir != old_dir) { |
|
/* Note: If we moved a directory, nlink will change */ |
|
nfs4_update_changeattr(old_dir, &res->old_cinfo, |
|
res->old_fattr->time_start, |
|
NFS_INO_INVALID_OTHER | |
|
NFS_INO_INVALID_DATA); |
|
nfs4_update_changeattr(new_dir, &res->new_cinfo, |
|
res->new_fattr->time_start, |
|
NFS_INO_INVALID_OTHER | |
|
NFS_INO_INVALID_DATA); |
|
} else |
|
nfs4_update_changeattr(old_dir, &res->old_cinfo, |
|
res->old_fattr->time_start, |
|
NFS_INO_INVALID_DATA); |
|
} |
|
return 1; |
|
} |
|
|
|
static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
__u32 bitmask[NFS4_BITMASK_SZ]; |
|
struct nfs4_link_arg arg = { |
|
.fh = NFS_FH(inode), |
|
.dir_fh = NFS_FH(dir), |
|
.name = name, |
|
.bitmask = bitmask, |
|
}; |
|
struct nfs4_link_res res = { |
|
.server = server, |
|
.label = NULL, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], |
|
.rpc_argp = &arg, |
|
.rpc_resp = &res, |
|
}; |
|
int status = -ENOMEM; |
|
|
|
res.fattr = nfs_alloc_fattr(); |
|
if (res.fattr == NULL) |
|
goto out; |
|
|
|
res.label = nfs4_label_alloc(server, GFP_KERNEL); |
|
if (IS_ERR(res.label)) { |
|
status = PTR_ERR(res.label); |
|
goto out; |
|
} |
|
|
|
nfs4_inode_make_writeable(inode); |
|
nfs4_bitmap_copy_adjust_setattr(bitmask, nfs4_bitmask(server, res.label), inode); |
|
|
|
status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
|
if (!status) { |
|
nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start, |
|
NFS_INO_INVALID_DATA); |
|
status = nfs_post_op_update_inode(inode, res.fattr); |
|
if (!status) |
|
nfs_setsecurity(inode, res.fattr, res.label); |
|
} |
|
|
|
|
|
nfs4_label_free(res.label); |
|
|
|
out: |
|
nfs_free_fattr(res.fattr); |
|
return status; |
|
} |
|
|
|
static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int err; |
|
do { |
|
err = nfs4_handle_exception(NFS_SERVER(inode), |
|
_nfs4_proc_link(inode, dir, name), |
|
&exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
struct nfs4_createdata { |
|
struct rpc_message msg; |
|
struct nfs4_create_arg arg; |
|
struct nfs4_create_res res; |
|
struct nfs_fh fh; |
|
struct nfs_fattr fattr; |
|
struct nfs4_label *label; |
|
}; |
|
|
|
static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, |
|
const struct qstr *name, struct iattr *sattr, u32 ftype) |
|
{ |
|
struct nfs4_createdata *data; |
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL); |
|
if (data != NULL) { |
|
struct nfs_server *server = NFS_SERVER(dir); |
|
|
|
data->label = nfs4_label_alloc(server, GFP_KERNEL); |
|
if (IS_ERR(data->label)) |
|
goto out_free; |
|
|
|
data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; |
|
data->msg.rpc_argp = &data->arg; |
|
data->msg.rpc_resp = &data->res; |
|
data->arg.dir_fh = NFS_FH(dir); |
|
data->arg.server = server; |
|
data->arg.name = name; |
|
data->arg.attrs = sattr; |
|
data->arg.ftype = ftype; |
|
data->arg.bitmask = nfs4_bitmask(server, data->label); |
|
data->arg.umask = current_umask(); |
|
data->res.server = server; |
|
data->res.fh = &data->fh; |
|
data->res.fattr = &data->fattr; |
|
data->res.label = data->label; |
|
nfs_fattr_init(data->res.fattr); |
|
} |
|
return data; |
|
out_free: |
|
kfree(data); |
|
return NULL; |
|
} |
|
|
|
static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) |
|
{ |
|
int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, |
|
&data->arg.seq_args, &data->res.seq_res, 1); |
|
if (status == 0) { |
|
spin_lock(&dir->i_lock); |
|
nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo, |
|
data->res.fattr->time_start, |
|
NFS_INO_INVALID_DATA); |
|
/* Creating a directory bumps nlink in the parent */ |
|
if (data->arg.ftype == NF4DIR) |
|
nfs4_inc_nlink_locked(dir); |
|
spin_unlock(&dir->i_lock); |
|
status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label); |
|
} |
|
return status; |
|
} |
|
|
|
static void nfs4_free_createdata(struct nfs4_createdata *data) |
|
{ |
|
nfs4_label_free(data->label); |
|
kfree(data); |
|
} |
|
|
|
static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
|
struct page *page, unsigned int len, struct iattr *sattr, |
|
struct nfs4_label *label) |
|
{ |
|
struct nfs4_createdata *data; |
|
int status = -ENAMETOOLONG; |
|
|
|
if (len > NFS4_MAXPATHLEN) |
|
goto out; |
|
|
|
status = -ENOMEM; |
|
data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); |
|
if (data == NULL) |
|
goto out; |
|
|
|
data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; |
|
data->arg.u.symlink.pages = &page; |
|
data->arg.u.symlink.len = len; |
|
data->arg.label = label; |
|
|
|
status = nfs4_do_create(dir, dentry, data); |
|
|
|
nfs4_free_createdata(data); |
|
out: |
|
return status; |
|
} |
|
|
|
static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
|
struct page *page, unsigned int len, struct iattr *sattr) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
struct nfs4_label l, *label = NULL; |
|
int err; |
|
|
|
label = nfs4_label_init_security(dir, dentry, sattr, &l); |
|
|
|
do { |
|
err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); |
|
trace_nfs4_symlink(dir, &dentry->d_name, err); |
|
err = nfs4_handle_exception(NFS_SERVER(dir), err, |
|
&exception); |
|
} while (exception.retry); |
|
|
|
nfs4_label_release_security(label); |
|
return err; |
|
} |
|
|
|
static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, |
|
struct iattr *sattr, struct nfs4_label *label) |
|
{ |
|
struct nfs4_createdata *data; |
|
int status = -ENOMEM; |
|
|
|
data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); |
|
if (data == NULL) |
|
goto out; |
|
|
|
data->arg.label = label; |
|
status = nfs4_do_create(dir, dentry, data); |
|
|
|
nfs4_free_createdata(data); |
|
out: |
|
return status; |
|
} |
|
|
|
static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, |
|
struct iattr *sattr) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(dir); |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
struct nfs4_label l, *label = NULL; |
|
int err; |
|
|
|
label = nfs4_label_init_security(dir, dentry, sattr, &l); |
|
|
|
if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) |
|
sattr->ia_mode &= ~current_umask(); |
|
do { |
|
err = _nfs4_proc_mkdir(dir, dentry, sattr, label); |
|
trace_nfs4_mkdir(dir, &dentry->d_name, err); |
|
err = nfs4_handle_exception(NFS_SERVER(dir), err, |
|
&exception); |
|
} while (exception.retry); |
|
nfs4_label_release_security(label); |
|
|
|
return err; |
|
} |
|
|
|
static int _nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred, |
|
u64 cookie, struct page **pages, unsigned int count, bool plus) |
|
{ |
|
struct inode *dir = d_inode(dentry); |
|
struct nfs_server *server = NFS_SERVER(dir); |
|
struct nfs4_readdir_arg args = { |
|
.fh = NFS_FH(dir), |
|
.pages = pages, |
|
.pgbase = 0, |
|
.count = count, |
|
.plus = plus, |
|
}; |
|
struct nfs4_readdir_res res; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
.rpc_cred = cred, |
|
}; |
|
int status; |
|
|
|
dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__, |
|
dentry, |
|
(unsigned long long)cookie); |
|
if (!(server->caps & NFS_CAP_SECURITY_LABEL)) |
|
args.bitmask = server->attr_bitmask_nl; |
|
else |
|
args.bitmask = server->attr_bitmask; |
|
|
|
nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args); |
|
res.pgbase = args.pgbase; |
|
status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, |
|
&res.seq_res, 0); |
|
if (status >= 0) { |
|
memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE); |
|
status += args.pgbase; |
|
} |
|
|
|
nfs_invalidate_atime(dir); |
|
|
|
dprintk("%s: returns %d\n", __func__, status); |
|
return status; |
|
} |
|
|
|
static int nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred, |
|
u64 cookie, struct page **pages, unsigned int count, bool plus) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int err; |
|
do { |
|
err = _nfs4_proc_readdir(dentry, cred, cookie, |
|
pages, count, plus); |
|
trace_nfs4_readdir(d_inode(dentry), err); |
|
err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err, |
|
&exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, |
|
struct iattr *sattr, struct nfs4_label *label, dev_t rdev) |
|
{ |
|
struct nfs4_createdata *data; |
|
int mode = sattr->ia_mode; |
|
int status = -ENOMEM; |
|
|
|
data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); |
|
if (data == NULL) |
|
goto out; |
|
|
|
if (S_ISFIFO(mode)) |
|
data->arg.ftype = NF4FIFO; |
|
else if (S_ISBLK(mode)) { |
|
data->arg.ftype = NF4BLK; |
|
data->arg.u.device.specdata1 = MAJOR(rdev); |
|
data->arg.u.device.specdata2 = MINOR(rdev); |
|
} |
|
else if (S_ISCHR(mode)) { |
|
data->arg.ftype = NF4CHR; |
|
data->arg.u.device.specdata1 = MAJOR(rdev); |
|
data->arg.u.device.specdata2 = MINOR(rdev); |
|
} else if (!S_ISSOCK(mode)) { |
|
status = -EINVAL; |
|
goto out_free; |
|
} |
|
|
|
data->arg.label = label; |
|
status = nfs4_do_create(dir, dentry, data); |
|
out_free: |
|
nfs4_free_createdata(data); |
|
out: |
|
return status; |
|
} |
|
|
|
static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, |
|
struct iattr *sattr, dev_t rdev) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(dir); |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
struct nfs4_label l, *label = NULL; |
|
int err; |
|
|
|
label = nfs4_label_init_security(dir, dentry, sattr, &l); |
|
|
|
if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) |
|
sattr->ia_mode &= ~current_umask(); |
|
do { |
|
err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); |
|
trace_nfs4_mknod(dir, &dentry->d_name, err); |
|
err = nfs4_handle_exception(NFS_SERVER(dir), err, |
|
&exception); |
|
} while (exception.retry); |
|
|
|
nfs4_label_release_security(label); |
|
|
|
return err; |
|
} |
|
|
|
static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, |
|
struct nfs_fsstat *fsstat) |
|
{ |
|
struct nfs4_statfs_arg args = { |
|
.fh = fhandle, |
|
.bitmask = server->attr_bitmask, |
|
}; |
|
struct nfs4_statfs_res res = { |
|
.fsstat = fsstat, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
}; |
|
|
|
nfs_fattr_init(fsstat->fattr); |
|
return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
|
} |
|
|
|
static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int err; |
|
do { |
|
err = nfs4_handle_exception(server, |
|
_nfs4_proc_statfs(server, fhandle, fsstat), |
|
&exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, |
|
struct nfs_fsinfo *fsinfo) |
|
{ |
|
struct nfs4_fsinfo_arg args = { |
|
.fh = fhandle, |
|
.bitmask = server->attr_bitmask, |
|
}; |
|
struct nfs4_fsinfo_res res = { |
|
.fsinfo = fsinfo, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
}; |
|
|
|
return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
|
} |
|
|
|
static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int err; |
|
|
|
do { |
|
err = _nfs4_do_fsinfo(server, fhandle, fsinfo); |
|
trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); |
|
if (err == 0) { |
|
nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ); |
|
break; |
|
} |
|
err = nfs4_handle_exception(server, err, &exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) |
|
{ |
|
int error; |
|
|
|
nfs_fattr_init(fsinfo->fattr); |
|
error = nfs4_do_fsinfo(server, fhandle, fsinfo); |
|
if (error == 0) { |
|
/* block layout checks this! */ |
|
server->pnfs_blksize = fsinfo->blksize; |
|
set_pnfs_layoutdriver(server, fhandle, fsinfo); |
|
} |
|
|
|
return error; |
|
} |
|
|
|
static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
|
struct nfs_pathconf *pathconf) |
|
{ |
|
struct nfs4_pathconf_arg args = { |
|
.fh = fhandle, |
|
.bitmask = server->attr_bitmask, |
|
}; |
|
struct nfs4_pathconf_res res = { |
|
.pathconf = pathconf, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
}; |
|
|
|
/* None of the pathconf attributes are mandatory to implement */ |
|
if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { |
|
memset(pathconf, 0, sizeof(*pathconf)); |
|
return 0; |
|
} |
|
|
|
nfs_fattr_init(pathconf->fattr); |
|
return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
|
} |
|
|
|
static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
|
struct nfs_pathconf *pathconf) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int err; |
|
|
|
do { |
|
err = nfs4_handle_exception(server, |
|
_nfs4_proc_pathconf(server, fhandle, pathconf), |
|
&exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
int nfs4_set_rw_stateid(nfs4_stateid *stateid, |
|
const struct nfs_open_context *ctx, |
|
const struct nfs_lock_context *l_ctx, |
|
fmode_t fmode) |
|
{ |
|
return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); |
|
} |
|
EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); |
|
|
|
static bool nfs4_stateid_is_current(nfs4_stateid *stateid, |
|
const struct nfs_open_context *ctx, |
|
const struct nfs_lock_context *l_ctx, |
|
fmode_t fmode) |
|
{ |
|
nfs4_stateid _current_stateid; |
|
|
|
/* If the current stateid represents a lost lock, then exit */ |
|
if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO) |
|
return true; |
|
return nfs4_stateid_match(stateid, &_current_stateid); |
|
} |
|
|
|
static bool nfs4_error_stateid_expired(int err) |
|
{ |
|
switch (err) { |
|
case -NFS4ERR_DELEG_REVOKED: |
|
case -NFS4ERR_ADMIN_REVOKED: |
|
case -NFS4ERR_BAD_STATEID: |
|
case -NFS4ERR_STALE_STATEID: |
|
case -NFS4ERR_OLD_STATEID: |
|
case -NFS4ERR_OPENMODE: |
|
case -NFS4ERR_EXPIRED: |
|
return true; |
|
} |
|
return false; |
|
} |
|
|
|
static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(hdr->inode); |
|
|
|
trace_nfs4_read(hdr, task->tk_status); |
|
if (task->tk_status < 0) { |
|
struct nfs4_exception exception = { |
|
.inode = hdr->inode, |
|
.state = hdr->args.context->state, |
|
.stateid = &hdr->args.stateid, |
|
}; |
|
task->tk_status = nfs4_async_handle_exception(task, |
|
server, task->tk_status, &exception); |
|
if (exception.retry) { |
|
rpc_restart_call_prepare(task); |
|
return -EAGAIN; |
|
} |
|
} |
|
|
|
if (task->tk_status > 0) |
|
renew_lease(server, hdr->timestamp); |
|
return 0; |
|
} |
|
|
|
static bool nfs4_read_stateid_changed(struct rpc_task *task, |
|
struct nfs_pgio_args *args) |
|
{ |
|
|
|
if (!nfs4_error_stateid_expired(task->tk_status) || |
|
nfs4_stateid_is_current(&args->stateid, |
|
args->context, |
|
args->lock_context, |
|
FMODE_READ)) |
|
return false; |
|
rpc_restart_call_prepare(task); |
|
return true; |
|
} |
|
|
|
static bool nfs4_read_plus_not_supported(struct rpc_task *task, |
|
struct nfs_pgio_header *hdr) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(hdr->inode); |
|
struct rpc_message *msg = &task->tk_msg; |
|
|
|
if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] && |
|
server->caps & NFS_CAP_READ_PLUS && task->tk_status == -ENOTSUPP) { |
|
server->caps &= ~NFS_CAP_READ_PLUS; |
|
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; |
|
rpc_restart_call_prepare(task); |
|
return true; |
|
} |
|
return false; |
|
} |
|
|
|
static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) |
|
{ |
|
dprintk("--> %s\n", __func__); |
|
|
|
if (!nfs4_sequence_done(task, &hdr->res.seq_res)) |
|
return -EAGAIN; |
|
if (nfs4_read_stateid_changed(task, &hdr->args)) |
|
return -EAGAIN; |
|
if (nfs4_read_plus_not_supported(task, hdr)) |
|
return -EAGAIN; |
|
if (task->tk_status > 0) |
|
nfs_invalidate_atime(hdr->inode); |
|
return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : |
|
nfs4_read_done_cb(task, hdr); |
|
} |
|
|
|
#if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS |
|
static void nfs42_read_plus_support(struct nfs_server *server, struct rpc_message *msg) |
|
{ |
|
if (server->caps & NFS_CAP_READ_PLUS) |
|
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS]; |
|
else |
|
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; |
|
} |
|
#else |
|
static void nfs42_read_plus_support(struct nfs_server *server, struct rpc_message *msg) |
|
{ |
|
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; |
|
} |
|
#endif /* CONFIG_NFS_V4_2 */ |
|
|
|
static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, |
|
struct rpc_message *msg) |
|
{ |
|
hdr->timestamp = jiffies; |
|
if (!hdr->pgio_done_cb) |
|
hdr->pgio_done_cb = nfs4_read_done_cb; |
|
nfs42_read_plus_support(NFS_SERVER(hdr->inode), msg); |
|
nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); |
|
} |
|
|
|
static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, |
|
struct nfs_pgio_header *hdr) |
|
{ |
|
if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, |
|
&hdr->args.seq_args, |
|
&hdr->res.seq_res, |
|
task)) |
|
return 0; |
|
if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, |
|
hdr->args.lock_context, |
|
hdr->rw_mode) == -EIO) |
|
return -EIO; |
|
if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) |
|
return -EIO; |
|
return 0; |
|
} |
|
|
|
static int nfs4_write_done_cb(struct rpc_task *task, |
|
struct nfs_pgio_header *hdr) |
|
{ |
|
struct inode *inode = hdr->inode; |
|
|
|
trace_nfs4_write(hdr, task->tk_status); |
|
if (task->tk_status < 0) { |
|
struct nfs4_exception exception = { |
|
.inode = hdr->inode, |
|
.state = hdr->args.context->state, |
|
.stateid = &hdr->args.stateid, |
|
}; |
|
task->tk_status = nfs4_async_handle_exception(task, |
|
NFS_SERVER(inode), task->tk_status, |
|
&exception); |
|
if (exception.retry) { |
|
rpc_restart_call_prepare(task); |
|
return -EAGAIN; |
|
} |
|
} |
|
if (task->tk_status >= 0) { |
|
renew_lease(NFS_SERVER(inode), hdr->timestamp); |
|
nfs_writeback_update_inode(hdr); |
|
} |
|
return 0; |
|
} |
|
|
|
static bool nfs4_write_stateid_changed(struct rpc_task *task, |
|
struct nfs_pgio_args *args) |
|
{ |
|
|
|
if (!nfs4_error_stateid_expired(task->tk_status) || |
|
nfs4_stateid_is_current(&args->stateid, |
|
args->context, |
|
args->lock_context, |
|
FMODE_WRITE)) |
|
return false; |
|
rpc_restart_call_prepare(task); |
|
return true; |
|
} |
|
|
|
static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) |
|
{ |
|
if (!nfs4_sequence_done(task, &hdr->res.seq_res)) |
|
return -EAGAIN; |
|
if (nfs4_write_stateid_changed(task, &hdr->args)) |
|
return -EAGAIN; |
|
return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : |
|
nfs4_write_done_cb(task, hdr); |
|
} |
|
|
|
static |
|
bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) |
|
{ |
|
/* Don't request attributes for pNFS or O_DIRECT writes */ |
|
if (hdr->ds_clp != NULL || hdr->dreq != NULL) |
|
return false; |
|
/* Otherwise, request attributes if and only if we don't hold |
|
* a delegation |
|
*/ |
|
return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; |
|
} |
|
|
|
static void nfs4_bitmask_set(__u32 bitmask[NFS4_BITMASK_SZ], const __u32 *src, |
|
struct inode *inode, struct nfs_server *server, |
|
struct nfs4_label *label) |
|
{ |
|
unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); |
|
unsigned int i; |
|
|
|
memcpy(bitmask, src, sizeof(*bitmask) * NFS4_BITMASK_SZ); |
|
|
|
if (cache_validity & (NFS_INO_INVALID_CHANGE | NFS_INO_REVAL_PAGECACHE)) |
|
bitmask[0] |= FATTR4_WORD0_CHANGE; |
|
if (cache_validity & NFS_INO_INVALID_ATIME) |
|
bitmask[1] |= FATTR4_WORD1_TIME_ACCESS; |
|
if (cache_validity & NFS_INO_INVALID_OTHER) |
|
bitmask[1] |= FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | |
|
FATTR4_WORD1_OWNER_GROUP | |
|
FATTR4_WORD1_NUMLINKS; |
|
if (label && label->len && cache_validity & NFS_INO_INVALID_LABEL) |
|
bitmask[2] |= FATTR4_WORD2_SECURITY_LABEL; |
|
if (cache_validity & NFS_INO_INVALID_CTIME) |
|
bitmask[1] |= FATTR4_WORD1_TIME_METADATA; |
|
if (cache_validity & NFS_INO_INVALID_MTIME) |
|
bitmask[1] |= FATTR4_WORD1_TIME_MODIFY; |
|
if (cache_validity & NFS_INO_INVALID_BLOCKS) |
|
bitmask[1] |= FATTR4_WORD1_SPACE_USED; |
|
|
|
if (nfs4_have_delegation(inode, FMODE_READ) && |
|
!(cache_validity & NFS_INO_REVAL_FORCED)) |
|
bitmask[0] &= ~FATTR4_WORD0_SIZE; |
|
else if (cache_validity & |
|
(NFS_INO_INVALID_SIZE | NFS_INO_REVAL_PAGECACHE)) |
|
bitmask[0] |= FATTR4_WORD0_SIZE; |
|
|
|
for (i = 0; i < NFS4_BITMASK_SZ; i++) |
|
bitmask[i] &= server->attr_bitmask[i]; |
|
} |
|
|
|
static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, |
|
struct rpc_message *msg, |
|
struct rpc_clnt **clnt) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(hdr->inode); |
|
|
|
if (!nfs4_write_need_cache_consistency_data(hdr)) { |
|
hdr->args.bitmask = NULL; |
|
hdr->res.fattr = NULL; |
|
} else { |
|
nfs4_bitmask_set(hdr->args.bitmask_store, |
|
server->cache_consistency_bitmask, |
|
hdr->inode, server, NULL); |
|
hdr->args.bitmask = hdr->args.bitmask_store; |
|
} |
|
|
|
if (!hdr->pgio_done_cb) |
|
hdr->pgio_done_cb = nfs4_write_done_cb; |
|
hdr->res.server = server; |
|
hdr->timestamp = jiffies; |
|
|
|
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; |
|
nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); |
|
nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr); |
|
} |
|
|
|
static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) |
|
{ |
|
nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, |
|
&data->args.seq_args, |
|
&data->res.seq_res, |
|
task); |
|
} |
|
|
|
static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) |
|
{ |
|
struct inode *inode = data->inode; |
|
|
|
trace_nfs4_commit(data, task->tk_status); |
|
if (nfs4_async_handle_error(task, NFS_SERVER(inode), |
|
NULL, NULL) == -EAGAIN) { |
|
rpc_restart_call_prepare(task); |
|
return -EAGAIN; |
|
} |
|
return 0; |
|
} |
|
|
|
static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) |
|
{ |
|
if (!nfs4_sequence_done(task, &data->res.seq_res)) |
|
return -EAGAIN; |
|
return data->commit_done_cb(task, data); |
|
} |
|
|
|
static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, |
|
struct rpc_clnt **clnt) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(data->inode); |
|
|
|
if (data->commit_done_cb == NULL) |
|
data->commit_done_cb = nfs4_commit_done_cb; |
|
data->res.server = server; |
|
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; |
|
nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); |
|
nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg); |
|
} |
|
|
|
static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, |
|
struct nfs_commitres *res) |
|
{ |
|
struct inode *dst_inode = file_inode(dst); |
|
struct nfs_server *server = NFS_SERVER(dst_inode); |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], |
|
.rpc_argp = args, |
|
.rpc_resp = res, |
|
}; |
|
|
|
args->fh = NFS_FH(dst_inode); |
|
return nfs4_call_sync(server->client, server, &msg, |
|
&args->seq_args, &res->seq_res, 1); |
|
} |
|
|
|
int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) |
|
{ |
|
struct nfs_commitargs args = { |
|
.offset = offset, |
|
.count = count, |
|
}; |
|
struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); |
|
struct nfs4_exception exception = { }; |
|
int status; |
|
|
|
do { |
|
status = _nfs4_proc_commit(dst, &args, res); |
|
status = nfs4_handle_exception(dst_server, status, &exception); |
|
} while (exception.retry); |
|
|
|
return status; |
|
} |
|
|
|
struct nfs4_renewdata { |
|
struct nfs_client *client; |
|
unsigned long timestamp; |
|
}; |
|
|
|
/* |
|
* nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special |
|
* standalone procedure for queueing an asynchronous RENEW. |
|
*/ |
|
static void nfs4_renew_release(void *calldata) |
|
{ |
|
struct nfs4_renewdata *data = calldata; |
|
struct nfs_client *clp = data->client; |
|
|
|
if (refcount_read(&clp->cl_count) > 1) |
|
nfs4_schedule_state_renewal(clp); |
|
nfs_put_client(clp); |
|
kfree(data); |
|
} |
|
|
|
static void nfs4_renew_done(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_renewdata *data = calldata; |
|
struct nfs_client *clp = data->client; |
|
unsigned long timestamp = data->timestamp; |
|
|
|
trace_nfs4_renew_async(clp, task->tk_status); |
|
switch (task->tk_status) { |
|
case 0: |
|
break; |
|
case -NFS4ERR_LEASE_MOVED: |
|
nfs4_schedule_lease_moved_recovery(clp); |
|
break; |
|
default: |
|
/* Unless we're shutting down, schedule state recovery! */ |
|
if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) |
|
return; |
|
if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { |
|
nfs4_schedule_lease_recovery(clp); |
|
return; |
|
} |
|
nfs4_schedule_path_down_recovery(clp); |
|
} |
|
do_renew_lease(clp, timestamp); |
|
} |
|
|
|
static const struct rpc_call_ops nfs4_renew_ops = { |
|
.rpc_call_done = nfs4_renew_done, |
|
.rpc_release = nfs4_renew_release, |
|
}; |
|
|
|
static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) |
|
{ |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], |
|
.rpc_argp = clp, |
|
.rpc_cred = cred, |
|
}; |
|
struct nfs4_renewdata *data; |
|
|
|
if (renew_flags == 0) |
|
return 0; |
|
if (!refcount_inc_not_zero(&clp->cl_count)) |
|
return -EIO; |
|
data = kmalloc(sizeof(*data), GFP_NOFS); |
|
if (data == NULL) { |
|
nfs_put_client(clp); |
|
return -ENOMEM; |
|
} |
|
data->client = clp; |
|
data->timestamp = jiffies; |
|
return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, |
|
&nfs4_renew_ops, data); |
|
} |
|
|
|
static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) |
|
{ |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], |
|
.rpc_argp = clp, |
|
.rpc_cred = cred, |
|
}; |
|
unsigned long now = jiffies; |
|
int status; |
|
|
|
status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); |
|
if (status < 0) |
|
return status; |
|
do_renew_lease(clp, now); |
|
return 0; |
|
} |
|
|
|
static inline int nfs4_server_supports_acls(struct nfs_server *server) |
|
{ |
|
return server->caps & NFS_CAP_ACLS; |
|
} |
|
|
|
/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that |
|
* it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on |
|
* the stack. |
|
*/ |
|
#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) |
|
|
|
int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen, |
|
struct page **pages) |
|
{ |
|
struct page *newpage, **spages; |
|
int rc = 0; |
|
size_t len; |
|
spages = pages; |
|
|
|
do { |
|
len = min_t(size_t, PAGE_SIZE, buflen); |
|
newpage = alloc_page(GFP_KERNEL); |
|
|
|
if (newpage == NULL) |
|
goto unwind; |
|
memcpy(page_address(newpage), buf, len); |
|
buf += len; |
|
buflen -= len; |
|
*pages++ = newpage; |
|
rc++; |
|
} while (buflen != 0); |
|
|
|
return rc; |
|
|
|
unwind: |
|
for(; rc > 0; rc--) |
|
__free_page(spages[rc-1]); |
|
return -ENOMEM; |
|
} |
|
|
|
struct nfs4_cached_acl { |
|
int cached; |
|
size_t len; |
|
char data[]; |
|
}; |
|
|
|
static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) |
|
{ |
|
struct nfs_inode *nfsi = NFS_I(inode); |
|
|
|
spin_lock(&inode->i_lock); |
|
kfree(nfsi->nfs4_acl); |
|
nfsi->nfs4_acl = acl; |
|
spin_unlock(&inode->i_lock); |
|
} |
|
|
|
static void nfs4_zap_acl_attr(struct inode *inode) |
|
{ |
|
nfs4_set_cached_acl(inode, NULL); |
|
} |
|
|
|
static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) |
|
{ |
|
struct nfs_inode *nfsi = NFS_I(inode); |
|
struct nfs4_cached_acl *acl; |
|
int ret = -ENOENT; |
|
|
|
spin_lock(&inode->i_lock); |
|
acl = nfsi->nfs4_acl; |
|
if (acl == NULL) |
|
goto out; |
|
if (buf == NULL) /* user is just asking for length */ |
|
goto out_len; |
|
if (acl->cached == 0) |
|
goto out; |
|
ret = -ERANGE; /* see getxattr(2) man page */ |
|
if (acl->len > buflen) |
|
goto out; |
|
memcpy(buf, acl->data, acl->len); |
|
out_len: |
|
ret = acl->len; |
|
out: |
|
spin_unlock(&inode->i_lock); |
|
return ret; |
|
} |
|
|
|
static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) |
|
{ |
|
struct nfs4_cached_acl *acl; |
|
size_t buflen = sizeof(*acl) + acl_len; |
|
|
|
if (buflen <= PAGE_SIZE) { |
|
acl = kmalloc(buflen, GFP_KERNEL); |
|
if (acl == NULL) |
|
goto out; |
|
acl->cached = 1; |
|
_copy_from_pages(acl->data, pages, pgbase, acl_len); |
|
} else { |
|
acl = kmalloc(sizeof(*acl), GFP_KERNEL); |
|
if (acl == NULL) |
|
goto out; |
|
acl->cached = 0; |
|
} |
|
acl->len = acl_len; |
|
out: |
|
nfs4_set_cached_acl(inode, acl); |
|
} |
|
|
|
/* |
|
* The getxattr API returns the required buffer length when called with a |
|
* NULL buf. The NFSv4 acl tool then calls getxattr again after allocating |
|
* the required buf. On a NULL buf, we send a page of data to the server |
|
* guessing that the ACL request can be serviced by a page. If so, we cache |
|
* up to the page of ACL data, and the 2nd call to getxattr is serviced by |
|
* the cache. If not so, we throw away the page, and cache the required |
|
* length. The next getxattr call will then produce another round trip to |
|
* the server, this time with the input buf of the required size. |
|
*/ |
|
static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
|
{ |
|
struct page **pages; |
|
struct nfs_getaclargs args = { |
|
.fh = NFS_FH(inode), |
|
.acl_len = buflen, |
|
}; |
|
struct nfs_getaclres res = { |
|
.acl_len = buflen, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
}; |
|
unsigned int npages; |
|
int ret = -ENOMEM, i; |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
|
|
if (buflen == 0) |
|
buflen = server->rsize; |
|
|
|
npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; |
|
pages = kmalloc_array(npages, sizeof(struct page *), GFP_NOFS); |
|
if (!pages) |
|
return -ENOMEM; |
|
|
|
args.acl_pages = pages; |
|
|
|
for (i = 0; i < npages; i++) { |
|
pages[i] = alloc_page(GFP_KERNEL); |
|
if (!pages[i]) |
|
goto out_free; |
|
} |
|
|
|
/* for decoding across pages */ |
|
res.acl_scratch = alloc_page(GFP_KERNEL); |
|
if (!res.acl_scratch) |
|
goto out_free; |
|
|
|
args.acl_len = npages * PAGE_SIZE; |
|
|
|
dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", |
|
__func__, buf, buflen, npages, args.acl_len); |
|
ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), |
|
&msg, &args.seq_args, &res.seq_res, 0); |
|
if (ret) |
|
goto out_free; |
|
|
|
/* Handle the case where the passed-in buffer is too short */ |
|
if (res.acl_flags & NFS4_ACL_TRUNC) { |
|
/* Did the user only issue a request for the acl length? */ |
|
if (buf == NULL) |
|
goto out_ok; |
|
ret = -ERANGE; |
|
goto out_free; |
|
} |
|
nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); |
|
if (buf) { |
|
if (res.acl_len > buflen) { |
|
ret = -ERANGE; |
|
goto out_free; |
|
} |
|
_copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); |
|
} |
|
out_ok: |
|
ret = res.acl_len; |
|
out_free: |
|
for (i = 0; i < npages; i++) |
|
if (pages[i]) |
|
__free_page(pages[i]); |
|
if (res.acl_scratch) |
|
__free_page(res.acl_scratch); |
|
kfree(pages); |
|
return ret; |
|
} |
|
|
|
static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
ssize_t ret; |
|
do { |
|
ret = __nfs4_get_acl_uncached(inode, buf, buflen); |
|
trace_nfs4_get_acl(inode, ret); |
|
if (ret >= 0) |
|
break; |
|
ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); |
|
} while (exception.retry); |
|
return ret; |
|
} |
|
|
|
static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
int ret; |
|
|
|
if (!nfs4_server_supports_acls(server)) |
|
return -EOPNOTSUPP; |
|
ret = nfs_revalidate_inode(server, inode); |
|
if (ret < 0) |
|
return ret; |
|
if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) |
|
nfs_zap_acl_cache(inode); |
|
ret = nfs4_read_cached_acl(inode, buf, buflen); |
|
if (ret != -ENOENT) |
|
/* -ENOENT is returned if there is no ACL or if there is an ACL |
|
* but no cached acl data, just the acl length */ |
|
return ret; |
|
return nfs4_get_acl_uncached(inode, buf, buflen); |
|
} |
|
|
|
static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
struct page *pages[NFS4ACL_MAXPAGES]; |
|
struct nfs_setaclargs arg = { |
|
.fh = NFS_FH(inode), |
|
.acl_pages = pages, |
|
.acl_len = buflen, |
|
}; |
|
struct nfs_setaclres res; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], |
|
.rpc_argp = &arg, |
|
.rpc_resp = &res, |
|
}; |
|
unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); |
|
int ret, i; |
|
|
|
/* You can't remove system.nfs4_acl: */ |
|
if (buflen == 0) |
|
return -EINVAL; |
|
if (!nfs4_server_supports_acls(server)) |
|
return -EOPNOTSUPP; |
|
if (npages > ARRAY_SIZE(pages)) |
|
return -ERANGE; |
|
i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages); |
|
if (i < 0) |
|
return i; |
|
nfs4_inode_make_writeable(inode); |
|
ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
|
|
|
/* |
|
* Free each page after tx, so the only ref left is |
|
* held by the network stack |
|
*/ |
|
for (; i > 0; i--) |
|
put_page(pages[i-1]); |
|
|
|
/* |
|
* Acl update can result in inode attribute update. |
|
* so mark the attribute cache invalid. |
|
*/ |
|
spin_lock(&inode->i_lock); |
|
NFS_I(inode)->cache_validity |= NFS_INO_INVALID_CHANGE |
|
| NFS_INO_INVALID_CTIME |
|
| NFS_INO_REVAL_FORCED; |
|
spin_unlock(&inode->i_lock); |
|
nfs_access_zap_cache(inode); |
|
nfs_zap_acl_cache(inode); |
|
return ret; |
|
} |
|
|
|
static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
|
{ |
|
struct nfs4_exception exception = { }; |
|
int err; |
|
do { |
|
err = __nfs4_proc_set_acl(inode, buf, buflen); |
|
trace_nfs4_set_acl(inode, err); |
|
if (err == -NFS4ERR_BADOWNER || err == -NFS4ERR_BADNAME) { |
|
/* |
|
* no need to retry since the kernel |
|
* isn't involved in encoding the ACEs. |
|
*/ |
|
err = -EINVAL; |
|
break; |
|
} |
|
err = nfs4_handle_exception(NFS_SERVER(inode), err, |
|
&exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
#ifdef CONFIG_NFS_V4_SECURITY_LABEL |
|
static int _nfs4_get_security_label(struct inode *inode, void *buf, |
|
size_t buflen) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
struct nfs_fattr fattr; |
|
struct nfs4_label label = {0, 0, buflen, buf}; |
|
|
|
u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; |
|
struct nfs4_getattr_arg arg = { |
|
.fh = NFS_FH(inode), |
|
.bitmask = bitmask, |
|
}; |
|
struct nfs4_getattr_res res = { |
|
.fattr = &fattr, |
|
.label = &label, |
|
.server = server, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], |
|
.rpc_argp = &arg, |
|
.rpc_resp = &res, |
|
}; |
|
int ret; |
|
|
|
nfs_fattr_init(&fattr); |
|
|
|
ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); |
|
if (ret) |
|
return ret; |
|
if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) |
|
return -ENOENT; |
|
return label.len; |
|
} |
|
|
|
static int nfs4_get_security_label(struct inode *inode, void *buf, |
|
size_t buflen) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int err; |
|
|
|
if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) |
|
return -EOPNOTSUPP; |
|
|
|
do { |
|
err = _nfs4_get_security_label(inode, buf, buflen); |
|
trace_nfs4_get_security_label(inode, err); |
|
err = nfs4_handle_exception(NFS_SERVER(inode), err, |
|
&exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
static int _nfs4_do_set_security_label(struct inode *inode, |
|
struct nfs4_label *ilabel, |
|
struct nfs_fattr *fattr, |
|
struct nfs4_label *olabel) |
|
{ |
|
|
|
struct iattr sattr = {0}; |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; |
|
struct nfs_setattrargs arg = { |
|
.fh = NFS_FH(inode), |
|
.iap = &sattr, |
|
.server = server, |
|
.bitmask = bitmask, |
|
.label = ilabel, |
|
}; |
|
struct nfs_setattrres res = { |
|
.fattr = fattr, |
|
.label = olabel, |
|
.server = server, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
|
.rpc_argp = &arg, |
|
.rpc_resp = &res, |
|
}; |
|
int status; |
|
|
|
nfs4_stateid_copy(&arg.stateid, &zero_stateid); |
|
|
|
status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
|
if (status) |
|
dprintk("%s failed: %d\n", __func__, status); |
|
|
|
return status; |
|
} |
|
|
|
static int nfs4_do_set_security_label(struct inode *inode, |
|
struct nfs4_label *ilabel, |
|
struct nfs_fattr *fattr, |
|
struct nfs4_label *olabel) |
|
{ |
|
struct nfs4_exception exception = { }; |
|
int err; |
|
|
|
do { |
|
err = _nfs4_do_set_security_label(inode, ilabel, |
|
fattr, olabel); |
|
trace_nfs4_set_security_label(inode, err); |
|
err = nfs4_handle_exception(NFS_SERVER(inode), err, |
|
&exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
static int |
|
nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) |
|
{ |
|
struct nfs4_label ilabel, *olabel = NULL; |
|
struct nfs_fattr fattr; |
|
int status; |
|
|
|
if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) |
|
return -EOPNOTSUPP; |
|
|
|
nfs_fattr_init(&fattr); |
|
|
|
ilabel.pi = 0; |
|
ilabel.lfs = 0; |
|
ilabel.label = (char *)buf; |
|
ilabel.len = buflen; |
|
|
|
olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); |
|
if (IS_ERR(olabel)) { |
|
status = -PTR_ERR(olabel); |
|
goto out; |
|
} |
|
|
|
status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel); |
|
if (status == 0) |
|
nfs_setsecurity(inode, &fattr, olabel); |
|
|
|
nfs4_label_free(olabel); |
|
out: |
|
return status; |
|
} |
|
#endif /* CONFIG_NFS_V4_SECURITY_LABEL */ |
|
|
|
|
|
static void nfs4_init_boot_verifier(const struct nfs_client *clp, |
|
nfs4_verifier *bootverf) |
|
{ |
|
__be32 verf[2]; |
|
|
|
if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
|
/* An impossible timestamp guarantees this value |
|
* will never match a generated boot time. */ |
|
verf[0] = cpu_to_be32(U32_MAX); |
|
verf[1] = cpu_to_be32(U32_MAX); |
|
} else { |
|
struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
|
u64 ns = ktime_to_ns(nn->boot_time); |
|
|
|
verf[0] = cpu_to_be32(ns >> 32); |
|
verf[1] = cpu_to_be32(ns); |
|
} |
|
memcpy(bootverf->data, verf, sizeof(bootverf->data)); |
|
} |
|
|
|
static size_t |
|
nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen) |
|
{ |
|
struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
|
struct nfs_netns_client *nn_clp = nn->nfs_client; |
|
const char *id; |
|
|
|
buf[0] = '\0'; |
|
|
|
if (nn_clp) { |
|
rcu_read_lock(); |
|
id = rcu_dereference(nn_clp->identifier); |
|
if (id) |
|
strscpy(buf, id, buflen); |
|
rcu_read_unlock(); |
|
} |
|
|
|
if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0') |
|
strscpy(buf, nfs4_client_id_uniquifier, buflen); |
|
|
|
return strlen(buf); |
|
} |
|
|
|
static int |
|
nfs4_init_nonuniform_client_string(struct nfs_client *clp) |
|
{ |
|
char buf[NFS4_CLIENT_ID_UNIQ_LEN]; |
|
size_t buflen; |
|
size_t len; |
|
char *str; |
|
|
|
if (clp->cl_owner_id != NULL) |
|
return 0; |
|
|
|
rcu_read_lock(); |
|
len = 14 + |
|
strlen(clp->cl_rpcclient->cl_nodename) + |
|
1 + |
|
strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + |
|
1; |
|
rcu_read_unlock(); |
|
|
|
buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); |
|
if (buflen) |
|
len += buflen + 1; |
|
|
|
if (len > NFS4_OPAQUE_LIMIT + 1) |
|
return -EINVAL; |
|
|
|
/* |
|
* Since this string is allocated at mount time, and held until the |
|
* nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying |
|
* about a memory-reclaim deadlock. |
|
*/ |
|
str = kmalloc(len, GFP_KERNEL); |
|
if (!str) |
|
return -ENOMEM; |
|
|
|
rcu_read_lock(); |
|
if (buflen) |
|
scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", |
|
clp->cl_rpcclient->cl_nodename, buf, |
|
rpc_peeraddr2str(clp->cl_rpcclient, |
|
RPC_DISPLAY_ADDR)); |
|
else |
|
scnprintf(str, len, "Linux NFSv4.0 %s/%s", |
|
clp->cl_rpcclient->cl_nodename, |
|
rpc_peeraddr2str(clp->cl_rpcclient, |
|
RPC_DISPLAY_ADDR)); |
|
rcu_read_unlock(); |
|
|
|
clp->cl_owner_id = str; |
|
return 0; |
|
} |
|
|
|
static int |
|
nfs4_init_uniform_client_string(struct nfs_client *clp) |
|
{ |
|
char buf[NFS4_CLIENT_ID_UNIQ_LEN]; |
|
size_t buflen; |
|
size_t len; |
|
char *str; |
|
|
|
if (clp->cl_owner_id != NULL) |
|
return 0; |
|
|
|
len = 10 + 10 + 1 + 10 + 1 + |
|
strlen(clp->cl_rpcclient->cl_nodename) + 1; |
|
|
|
buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); |
|
if (buflen) |
|
len += buflen + 1; |
|
|
|
if (len > NFS4_OPAQUE_LIMIT + 1) |
|
return -EINVAL; |
|
|
|
/* |
|
* Since this string is allocated at mount time, and held until the |
|
* nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying |
|
* about a memory-reclaim deadlock. |
|
*/ |
|
str = kmalloc(len, GFP_KERNEL); |
|
if (!str) |
|
return -ENOMEM; |
|
|
|
if (buflen) |
|
scnprintf(str, len, "Linux NFSv%u.%u %s/%s", |
|
clp->rpc_ops->version, clp->cl_minorversion, |
|
buf, clp->cl_rpcclient->cl_nodename); |
|
else |
|
scnprintf(str, len, "Linux NFSv%u.%u %s", |
|
clp->rpc_ops->version, clp->cl_minorversion, |
|
clp->cl_rpcclient->cl_nodename); |
|
clp->cl_owner_id = str; |
|
return 0; |
|
} |
|
|
|
/* |
|
* nfs4_callback_up_net() starts only "tcp" and "tcp6" callback |
|
* services. Advertise one based on the address family of the |
|
* clientaddr. |
|
*/ |
|
static unsigned int |
|
nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) |
|
{ |
|
if (strchr(clp->cl_ipaddr, ':') != NULL) |
|
return scnprintf(buf, len, "tcp6"); |
|
else |
|
return scnprintf(buf, len, "tcp"); |
|
} |
|
|
|
static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_setclientid *sc = calldata; |
|
|
|
if (task->tk_status == 0) |
|
sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); |
|
} |
|
|
|
static const struct rpc_call_ops nfs4_setclientid_ops = { |
|
.rpc_call_done = nfs4_setclientid_done, |
|
}; |
|
|
|
/** |
|
* nfs4_proc_setclientid - Negotiate client ID |
|
* @clp: state data structure |
|
* @program: RPC program for NFSv4 callback service |
|
* @port: IP port number for NFS4 callback service |
|
* @cred: credential to use for this call |
|
* @res: where to place the result |
|
* |
|
* Returns zero, a negative errno, or a negative NFS4ERR status code. |
|
*/ |
|
int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, |
|
unsigned short port, const struct cred *cred, |
|
struct nfs4_setclientid_res *res) |
|
{ |
|
nfs4_verifier sc_verifier; |
|
struct nfs4_setclientid setclientid = { |
|
.sc_verifier = &sc_verifier, |
|
.sc_prog = program, |
|
.sc_clnt = clp, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], |
|
.rpc_argp = &setclientid, |
|
.rpc_resp = res, |
|
.rpc_cred = cred, |
|
}; |
|
struct rpc_task_setup task_setup_data = { |
|
.rpc_client = clp->cl_rpcclient, |
|
.rpc_message = &msg, |
|
.callback_ops = &nfs4_setclientid_ops, |
|
.callback_data = &setclientid, |
|
.flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, |
|
}; |
|
unsigned long now = jiffies; |
|
int status; |
|
|
|
/* nfs_client_id4 */ |
|
nfs4_init_boot_verifier(clp, &sc_verifier); |
|
|
|
if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) |
|
status = nfs4_init_uniform_client_string(clp); |
|
else |
|
status = nfs4_init_nonuniform_client_string(clp); |
|
|
|
if (status) |
|
goto out; |
|
|
|
/* cb_client4 */ |
|
setclientid.sc_netid_len = |
|
nfs4_init_callback_netid(clp, |
|
setclientid.sc_netid, |
|
sizeof(setclientid.sc_netid)); |
|
setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, |
|
sizeof(setclientid.sc_uaddr), "%s.%u.%u", |
|
clp->cl_ipaddr, port >> 8, port & 255); |
|
|
|
dprintk("NFS call setclientid auth=%s, '%s'\n", |
|
clp->cl_rpcclient->cl_auth->au_ops->au_name, |
|
clp->cl_owner_id); |
|
|
|
status = nfs4_call_sync_custom(&task_setup_data); |
|
if (setclientid.sc_cred) { |
|
kfree(clp->cl_acceptor); |
|
clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); |
|
put_rpccred(setclientid.sc_cred); |
|
} |
|
|
|
if (status == 0) |
|
do_renew_lease(clp, now); |
|
out: |
|
trace_nfs4_setclientid(clp, status); |
|
dprintk("NFS reply setclientid: %d\n", status); |
|
return status; |
|
} |
|
|
|
/** |
|
* nfs4_proc_setclientid_confirm - Confirm client ID |
|
* @clp: state data structure |
|
* @arg: result of a previous SETCLIENTID |
|
* @cred: credential to use for this call |
|
* |
|
* Returns zero, a negative errno, or a negative NFS4ERR status code. |
|
*/ |
|
int nfs4_proc_setclientid_confirm(struct nfs_client *clp, |
|
struct nfs4_setclientid_res *arg, |
|
const struct cred *cred) |
|
{ |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], |
|
.rpc_argp = arg, |
|
.rpc_cred = cred, |
|
}; |
|
int status; |
|
|
|
dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", |
|
clp->cl_rpcclient->cl_auth->au_ops->au_name, |
|
clp->cl_clientid); |
|
status = rpc_call_sync(clp->cl_rpcclient, &msg, |
|
RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); |
|
trace_nfs4_setclientid_confirm(clp, status); |
|
dprintk("NFS reply setclientid_confirm: %d\n", status); |
|
return status; |
|
} |
|
|
|
struct nfs4_delegreturndata { |
|
struct nfs4_delegreturnargs args; |
|
struct nfs4_delegreturnres res; |
|
struct nfs_fh fh; |
|
nfs4_stateid stateid; |
|
unsigned long timestamp; |
|
struct { |
|
struct nfs4_layoutreturn_args arg; |
|
struct nfs4_layoutreturn_res res; |
|
struct nfs4_xdr_opaque_data ld_private; |
|
u32 roc_barrier; |
|
bool roc; |
|
} lr; |
|
struct nfs_fattr fattr; |
|
int rpc_status; |
|
struct inode *inode; |
|
}; |
|
|
|
static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_delegreturndata *data = calldata; |
|
struct nfs4_exception exception = { |
|
.inode = data->inode, |
|
.stateid = &data->stateid, |
|
.task_is_privileged = data->args.seq_args.sa_privileged, |
|
}; |
|
|
|
if (!nfs4_sequence_done(task, &data->res.seq_res)) |
|
return; |
|
|
|
trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); |
|
|
|
/* Handle Layoutreturn errors */ |
|
if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res, |
|
&data->res.lr_ret) == -EAGAIN) |
|
goto out_restart; |
|
|
|
switch (task->tk_status) { |
|
case 0: |
|
renew_lease(data->res.server, data->timestamp); |
|
break; |
|
case -NFS4ERR_ADMIN_REVOKED: |
|
case -NFS4ERR_DELEG_REVOKED: |
|
case -NFS4ERR_EXPIRED: |
|
nfs4_free_revoked_stateid(data->res.server, |
|
data->args.stateid, |
|
task->tk_msg.rpc_cred); |
|
fallthrough; |
|
case -NFS4ERR_BAD_STATEID: |
|
case -NFS4ERR_STALE_STATEID: |
|
case -ETIMEDOUT: |
|
task->tk_status = 0; |
|
break; |
|
case -NFS4ERR_OLD_STATEID: |
|
if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) |
|
nfs4_stateid_seqid_inc(&data->stateid); |
|
if (data->args.bitmask) { |
|
data->args.bitmask = NULL; |
|
data->res.fattr = NULL; |
|
} |
|
goto out_restart; |
|
case -NFS4ERR_ACCESS: |
|
if (data->args.bitmask) { |
|
data->args.bitmask = NULL; |
|
data->res.fattr = NULL; |
|
goto out_restart; |
|
} |
|
fallthrough; |
|
default: |
|
task->tk_status = nfs4_async_handle_exception(task, |
|
data->res.server, task->tk_status, |
|
&exception); |
|
if (exception.retry) |
|
goto out_restart; |
|
} |
|
nfs_delegation_mark_returned(data->inode, data->args.stateid); |
|
data->rpc_status = task->tk_status; |
|
return; |
|
out_restart: |
|
task->tk_status = 0; |
|
rpc_restart_call_prepare(task); |
|
} |
|
|
|
static void nfs4_delegreturn_release(void *calldata) |
|
{ |
|
struct nfs4_delegreturndata *data = calldata; |
|
struct inode *inode = data->inode; |
|
|
|
if (data->lr.roc) |
|
pnfs_roc_release(&data->lr.arg, &data->lr.res, |
|
data->res.lr_ret); |
|
if (inode) { |
|
nfs_post_op_update_inode_force_wcc(inode, &data->fattr); |
|
nfs_iput_and_deactive(inode); |
|
} |
|
kfree(calldata); |
|
} |
|
|
|
static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs4_delegreturndata *d_data; |
|
struct pnfs_layout_hdr *lo; |
|
|
|
d_data = (struct nfs4_delegreturndata *)data; |
|
|
|
if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) { |
|
nfs4_sequence_done(task, &d_data->res.seq_res); |
|
return; |
|
} |
|
|
|
lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; |
|
if (lo && !pnfs_layout_is_valid(lo)) { |
|
d_data->args.lr_args = NULL; |
|
d_data->res.lr_res = NULL; |
|
} |
|
|
|
nfs4_setup_sequence(d_data->res.server->nfs_client, |
|
&d_data->args.seq_args, |
|
&d_data->res.seq_res, |
|
task); |
|
} |
|
|
|
static const struct rpc_call_ops nfs4_delegreturn_ops = { |
|
.rpc_call_prepare = nfs4_delegreturn_prepare, |
|
.rpc_call_done = nfs4_delegreturn_done, |
|
.rpc_release = nfs4_delegreturn_release, |
|
}; |
|
|
|
static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) |
|
{ |
|
struct nfs4_delegreturndata *data; |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
struct rpc_task *task; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], |
|
.rpc_cred = cred, |
|
}; |
|
struct rpc_task_setup task_setup_data = { |
|
.rpc_client = server->client, |
|
.rpc_message = &msg, |
|
.callback_ops = &nfs4_delegreturn_ops, |
|
.flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, |
|
}; |
|
int status = 0; |
|
|
|
data = kzalloc(sizeof(*data), GFP_NOFS); |
|
if (data == NULL) |
|
return -ENOMEM; |
|
|
|
nfs4_state_protect(server->nfs_client, |
|
NFS_SP4_MACH_CRED_CLEANUP, |
|
&task_setup_data.rpc_client, &msg); |
|
|
|
data->args.fhandle = &data->fh; |
|
data->args.stateid = &data->stateid; |
|
nfs4_bitmask_set(data->args.bitmask_store, |
|
server->cache_consistency_bitmask, inode, server, |
|
NULL); |
|
data->args.bitmask = data->args.bitmask_store; |
|
nfs_copy_fh(&data->fh, NFS_FH(inode)); |
|
nfs4_stateid_copy(&data->stateid, stateid); |
|
data->res.fattr = &data->fattr; |
|
data->res.server = server; |
|
data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; |
|
data->lr.arg.ld_private = &data->lr.ld_private; |
|
nfs_fattr_init(data->res.fattr); |
|
data->timestamp = jiffies; |
|
data->rpc_status = 0; |
|
data->inode = nfs_igrab_and_active(inode); |
|
if (data->inode || issync) { |
|
data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, |
|
cred); |
|
if (data->lr.roc) { |
|
data->args.lr_args = &data->lr.arg; |
|
data->res.lr_res = &data->lr.res; |
|
} |
|
} |
|
|
|
if (!data->inode) |
|
nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, |
|
1); |
|
else |
|
nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, |
|
0); |
|
task_setup_data.callback_data = data; |
|
msg.rpc_argp = &data->args; |
|
msg.rpc_resp = &data->res; |
|
task = rpc_run_task(&task_setup_data); |
|
if (IS_ERR(task)) |
|
return PTR_ERR(task); |
|
if (!issync) |
|
goto out; |
|
status = rpc_wait_for_completion_task(task); |
|
if (status != 0) |
|
goto out; |
|
status = data->rpc_status; |
|
out: |
|
rpc_put_task(task); |
|
return status; |
|
} |
|
|
|
int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
struct nfs4_exception exception = { }; |
|
int err; |
|
do { |
|
err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); |
|
trace_nfs4_delegreturn(inode, stateid, err); |
|
switch (err) { |
|
case -NFS4ERR_STALE_STATEID: |
|
case -NFS4ERR_EXPIRED: |
|
case 0: |
|
return 0; |
|
} |
|
err = nfs4_handle_exception(server, err, &exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
|
{ |
|
struct inode *inode = state->inode; |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
struct nfs_client *clp = server->nfs_client; |
|
struct nfs_lockt_args arg = { |
|
.fh = NFS_FH(inode), |
|
.fl = request, |
|
}; |
|
struct nfs_lockt_res res = { |
|
.denied = request, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], |
|
.rpc_argp = &arg, |
|
.rpc_resp = &res, |
|
.rpc_cred = state->owner->so_cred, |
|
}; |
|
struct nfs4_lock_state *lsp; |
|
int status; |
|
|
|
arg.lock_owner.clientid = clp->cl_clientid; |
|
status = nfs4_set_lock_state(state, request); |
|
if (status != 0) |
|
goto out; |
|
lsp = request->fl_u.nfs4_fl.owner; |
|
arg.lock_owner.id = lsp->ls_seqid.owner_id; |
|
arg.lock_owner.s_dev = server->s_dev; |
|
status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); |
|
switch (status) { |
|
case 0: |
|
request->fl_type = F_UNLCK; |
|
break; |
|
case -NFS4ERR_DENIED: |
|
status = 0; |
|
} |
|
request->fl_ops->fl_release_private(request); |
|
request->fl_ops = NULL; |
|
out: |
|
return status; |
|
} |
|
|
|
static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int err; |
|
|
|
do { |
|
err = _nfs4_proc_getlk(state, cmd, request); |
|
trace_nfs4_get_lock(request, state, cmd, err); |
|
err = nfs4_handle_exception(NFS_SERVER(state->inode), err, |
|
&exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
/* |
|
* Update the seqid of a lock stateid after receiving |
|
* NFS4ERR_OLD_STATEID |
|
*/ |
|
static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst, |
|
struct nfs4_lock_state *lsp) |
|
{ |
|
struct nfs4_state *state = lsp->ls_state; |
|
bool ret = false; |
|
|
|
spin_lock(&state->state_lock); |
|
if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid)) |
|
goto out; |
|
if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst)) |
|
nfs4_stateid_seqid_inc(dst); |
|
else |
|
dst->seqid = lsp->ls_stateid.seqid; |
|
ret = true; |
|
out: |
|
spin_unlock(&state->state_lock); |
|
return ret; |
|
} |
|
|
|
static bool nfs4_sync_lock_stateid(nfs4_stateid *dst, |
|
struct nfs4_lock_state *lsp) |
|
{ |
|
struct nfs4_state *state = lsp->ls_state; |
|
bool ret; |
|
|
|
spin_lock(&state->state_lock); |
|
ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid); |
|
nfs4_stateid_copy(dst, &lsp->ls_stateid); |
|
spin_unlock(&state->state_lock); |
|
return ret; |
|
} |
|
|
|
struct nfs4_unlockdata { |
|
struct nfs_locku_args arg; |
|
struct nfs_locku_res res; |
|
struct nfs4_lock_state *lsp; |
|
struct nfs_open_context *ctx; |
|
struct nfs_lock_context *l_ctx; |
|
struct file_lock fl; |
|
struct nfs_server *server; |
|
unsigned long timestamp; |
|
}; |
|
|
|
static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
|
struct nfs_open_context *ctx, |
|
struct nfs4_lock_state *lsp, |
|
struct nfs_seqid *seqid) |
|
{ |
|
struct nfs4_unlockdata *p; |
|
struct nfs4_state *state = lsp->ls_state; |
|
struct inode *inode = state->inode; |
|
|
|
p = kzalloc(sizeof(*p), GFP_NOFS); |
|
if (p == NULL) |
|
return NULL; |
|
p->arg.fh = NFS_FH(inode); |
|
p->arg.fl = &p->fl; |
|
p->arg.seqid = seqid; |
|
p->res.seqid = seqid; |
|
p->lsp = lsp; |
|
/* Ensure we don't close file until we're done freeing locks! */ |
|
p->ctx = get_nfs_open_context(ctx); |
|
p->l_ctx = nfs_get_lock_context(ctx); |
|
locks_init_lock(&p->fl); |
|
locks_copy_lock(&p->fl, fl); |
|
p->server = NFS_SERVER(inode); |
|
spin_lock(&state->state_lock); |
|
nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid); |
|
spin_unlock(&state->state_lock); |
|
return p; |
|
} |
|
|
|
static void nfs4_locku_release_calldata(void *data) |
|
{ |
|
struct nfs4_unlockdata *calldata = data; |
|
nfs_free_seqid(calldata->arg.seqid); |
|
nfs4_put_lock_state(calldata->lsp); |
|
nfs_put_lock_context(calldata->l_ctx); |
|
put_nfs_open_context(calldata->ctx); |
|
kfree(calldata); |
|
} |
|
|
|
static void nfs4_locku_done(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs4_unlockdata *calldata = data; |
|
struct nfs4_exception exception = { |
|
.inode = calldata->lsp->ls_state->inode, |
|
.stateid = &calldata->arg.stateid, |
|
}; |
|
|
|
if (!nfs4_sequence_done(task, &calldata->res.seq_res)) |
|
return; |
|
switch (task->tk_status) { |
|
case 0: |
|
renew_lease(calldata->server, calldata->timestamp); |
|
locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); |
|
if (nfs4_update_lock_stateid(calldata->lsp, |
|
&calldata->res.stateid)) |
|
break; |
|
fallthrough; |
|
case -NFS4ERR_ADMIN_REVOKED: |
|
case -NFS4ERR_EXPIRED: |
|
nfs4_free_revoked_stateid(calldata->server, |
|
&calldata->arg.stateid, |
|
task->tk_msg.rpc_cred); |
|
fallthrough; |
|
case -NFS4ERR_BAD_STATEID: |
|
case -NFS4ERR_STALE_STATEID: |
|
if (nfs4_sync_lock_stateid(&calldata->arg.stateid, |
|
calldata->lsp)) |
|
rpc_restart_call_prepare(task); |
|
break; |
|
case -NFS4ERR_OLD_STATEID: |
|
if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid, |
|
calldata->lsp)) |
|
rpc_restart_call_prepare(task); |
|
break; |
|
default: |
|
task->tk_status = nfs4_async_handle_exception(task, |
|
calldata->server, task->tk_status, |
|
&exception); |
|
if (exception.retry) |
|
rpc_restart_call_prepare(task); |
|
} |
|
nfs_release_seqid(calldata->arg.seqid); |
|
} |
|
|
|
static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs4_unlockdata *calldata = data; |
|
|
|
if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && |
|
nfs_async_iocounter_wait(task, calldata->l_ctx)) |
|
return; |
|
|
|
if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
|
goto out_wait; |
|
if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { |
|
/* Note: exit _without_ running nfs4_locku_done */ |
|
goto out_no_action; |
|
} |
|
calldata->timestamp = jiffies; |
|
if (nfs4_setup_sequence(calldata->server->nfs_client, |
|
&calldata->arg.seq_args, |
|
&calldata->res.seq_res, |
|
task) != 0) |
|
nfs_release_seqid(calldata->arg.seqid); |
|
return; |
|
out_no_action: |
|
task->tk_action = NULL; |
|
out_wait: |
|
nfs4_sequence_done(task, &calldata->res.seq_res); |
|
} |
|
|
|
static const struct rpc_call_ops nfs4_locku_ops = { |
|
.rpc_call_prepare = nfs4_locku_prepare, |
|
.rpc_call_done = nfs4_locku_done, |
|
.rpc_release = nfs4_locku_release_calldata, |
|
}; |
|
|
|
static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
|
struct nfs_open_context *ctx, |
|
struct nfs4_lock_state *lsp, |
|
struct nfs_seqid *seqid) |
|
{ |
|
struct nfs4_unlockdata *data; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], |
|
.rpc_cred = ctx->cred, |
|
}; |
|
struct rpc_task_setup task_setup_data = { |
|
.rpc_client = NFS_CLIENT(lsp->ls_state->inode), |
|
.rpc_message = &msg, |
|
.callback_ops = &nfs4_locku_ops, |
|
.workqueue = nfsiod_workqueue, |
|
.flags = RPC_TASK_ASYNC, |
|
}; |
|
|
|
nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, |
|
NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); |
|
|
|
/* Ensure this is an unlock - when canceling a lock, the |
|
* canceled lock is passed in, and it won't be an unlock. |
|
*/ |
|
fl->fl_type = F_UNLCK; |
|
if (fl->fl_flags & FL_CLOSE) |
|
set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); |
|
|
|
data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); |
|
if (data == NULL) { |
|
nfs_free_seqid(seqid); |
|
return ERR_PTR(-ENOMEM); |
|
} |
|
|
|
nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); |
|
msg.rpc_argp = &data->arg; |
|
msg.rpc_resp = &data->res; |
|
task_setup_data.callback_data = data; |
|
return rpc_run_task(&task_setup_data); |
|
} |
|
|
|
static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
|
{ |
|
struct inode *inode = state->inode; |
|
struct nfs4_state_owner *sp = state->owner; |
|
struct nfs_inode *nfsi = NFS_I(inode); |
|
struct nfs_seqid *seqid; |
|
struct nfs4_lock_state *lsp; |
|
struct rpc_task *task; |
|
struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); |
|
int status = 0; |
|
unsigned char fl_flags = request->fl_flags; |
|
|
|
status = nfs4_set_lock_state(state, request); |
|
/* Unlock _before_ we do the RPC call */ |
|
request->fl_flags |= FL_EXISTS; |
|
/* Exclude nfs_delegation_claim_locks() */ |
|
mutex_lock(&sp->so_delegreturn_mutex); |
|
/* Exclude nfs4_reclaim_open_stateid() - note nesting! */ |
|
down_read(&nfsi->rwsem); |
|
if (locks_lock_inode_wait(inode, request) == -ENOENT) { |
|
up_read(&nfsi->rwsem); |
|
mutex_unlock(&sp->so_delegreturn_mutex); |
|
goto out; |
|
} |
|
up_read(&nfsi->rwsem); |
|
mutex_unlock(&sp->so_delegreturn_mutex); |
|
if (status != 0) |
|
goto out; |
|
/* Is this a delegated lock? */ |
|
lsp = request->fl_u.nfs4_fl.owner; |
|
if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) |
|
goto out; |
|
alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; |
|
seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); |
|
status = -ENOMEM; |
|
if (IS_ERR(seqid)) |
|
goto out; |
|
task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); |
|
status = PTR_ERR(task); |
|
if (IS_ERR(task)) |
|
goto out; |
|
status = rpc_wait_for_completion_task(task); |
|
rpc_put_task(task); |
|
out: |
|
request->fl_flags = fl_flags; |
|
trace_nfs4_unlock(request, state, F_SETLK, status); |
|
return status; |
|
} |
|
|
|
struct nfs4_lockdata { |
|
struct nfs_lock_args arg; |
|
struct nfs_lock_res res; |
|
struct nfs4_lock_state *lsp; |
|
struct nfs_open_context *ctx; |
|
struct file_lock fl; |
|
unsigned long timestamp; |
|
int rpc_status; |
|
int cancelled; |
|
struct nfs_server *server; |
|
}; |
|
|
|
static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, |
|
struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, |
|
gfp_t gfp_mask) |
|
{ |
|
struct nfs4_lockdata *p; |
|
struct inode *inode = lsp->ls_state->inode; |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); |
|
|
|
p = kzalloc(sizeof(*p), gfp_mask); |
|
if (p == NULL) |
|
return NULL; |
|
|
|
p->arg.fh = NFS_FH(inode); |
|
p->arg.fl = &p->fl; |
|
p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); |
|
if (IS_ERR(p->arg.open_seqid)) |
|
goto out_free; |
|
alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; |
|
p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); |
|
if (IS_ERR(p->arg.lock_seqid)) |
|
goto out_free_seqid; |
|
p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; |
|
p->arg.lock_owner.id = lsp->ls_seqid.owner_id; |
|
p->arg.lock_owner.s_dev = server->s_dev; |
|
p->res.lock_seqid = p->arg.lock_seqid; |
|
p->lsp = lsp; |
|
p->server = server; |
|
p->ctx = get_nfs_open_context(ctx); |
|
locks_init_lock(&p->fl); |
|
locks_copy_lock(&p->fl, fl); |
|
return p; |
|
out_free_seqid: |
|
nfs_free_seqid(p->arg.open_seqid); |
|
out_free: |
|
kfree(p); |
|
return NULL; |
|
} |
|
|
|
static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_lockdata *data = calldata; |
|
struct nfs4_state *state = data->lsp->ls_state; |
|
|
|
dprintk("%s: begin!\n", __func__); |
|
if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
|
goto out_wait; |
|
/* Do we need to do an open_to_lock_owner? */ |
|
if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { |
|
if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { |
|
goto out_release_lock_seqid; |
|
} |
|
nfs4_stateid_copy(&data->arg.open_stateid, |
|
&state->open_stateid); |
|
data->arg.new_lock_owner = 1; |
|
data->res.open_seqid = data->arg.open_seqid; |
|
} else { |
|
data->arg.new_lock_owner = 0; |
|
nfs4_stateid_copy(&data->arg.lock_stateid, |
|
&data->lsp->ls_stateid); |
|
} |
|
if (!nfs4_valid_open_stateid(state)) { |
|
data->rpc_status = -EBADF; |
|
task->tk_action = NULL; |
|
goto out_release_open_seqid; |
|
} |
|
data->timestamp = jiffies; |
|
if (nfs4_setup_sequence(data->server->nfs_client, |
|
&data->arg.seq_args, |
|
&data->res.seq_res, |
|
task) == 0) |
|
return; |
|
out_release_open_seqid: |
|
nfs_release_seqid(data->arg.open_seqid); |
|
out_release_lock_seqid: |
|
nfs_release_seqid(data->arg.lock_seqid); |
|
out_wait: |
|
nfs4_sequence_done(task, &data->res.seq_res); |
|
dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); |
|
} |
|
|
|
static void nfs4_lock_done(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_lockdata *data = calldata; |
|
struct nfs4_lock_state *lsp = data->lsp; |
|
|
|
dprintk("%s: begin!\n", __func__); |
|
|
|
if (!nfs4_sequence_done(task, &data->res.seq_res)) |
|
return; |
|
|
|
data->rpc_status = task->tk_status; |
|
switch (task->tk_status) { |
|
case 0: |
|
renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), |
|
data->timestamp); |
|
if (data->arg.new_lock && !data->cancelled) { |
|
data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); |
|
if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) |
|
goto out_restart; |
|
} |
|
if (data->arg.new_lock_owner != 0) { |
|
nfs_confirm_seqid(&lsp->ls_seqid, 0); |
|
nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); |
|
set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); |
|
} else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) |
|
goto out_restart; |
|
break; |
|
case -NFS4ERR_BAD_STATEID: |
|
case -NFS4ERR_OLD_STATEID: |
|
case -NFS4ERR_STALE_STATEID: |
|
case -NFS4ERR_EXPIRED: |
|
if (data->arg.new_lock_owner != 0) { |
|
if (!nfs4_stateid_match(&data->arg.open_stateid, |
|
&lsp->ls_state->open_stateid)) |
|
goto out_restart; |
|
} else if (!nfs4_stateid_match(&data->arg.lock_stateid, |
|
&lsp->ls_stateid)) |
|
goto out_restart; |
|
} |
|
out_done: |
|
dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); |
|
return; |
|
out_restart: |
|
if (!data->cancelled) |
|
rpc_restart_call_prepare(task); |
|
goto out_done; |
|
} |
|
|
|
static void nfs4_lock_release(void *calldata) |
|
{ |
|
struct nfs4_lockdata *data = calldata; |
|
|
|
dprintk("%s: begin!\n", __func__); |
|
nfs_free_seqid(data->arg.open_seqid); |
|
if (data->cancelled && data->rpc_status == 0) { |
|
struct rpc_task *task; |
|
task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, |
|
data->arg.lock_seqid); |
|
if (!IS_ERR(task)) |
|
rpc_put_task_async(task); |
|
dprintk("%s: cancelling lock!\n", __func__); |
|
} else |
|
nfs_free_seqid(data->arg.lock_seqid); |
|
nfs4_put_lock_state(data->lsp); |
|
put_nfs_open_context(data->ctx); |
|
kfree(data); |
|
dprintk("%s: done!\n", __func__); |
|
} |
|
|
|
static const struct rpc_call_ops nfs4_lock_ops = { |
|
.rpc_call_prepare = nfs4_lock_prepare, |
|
.rpc_call_done = nfs4_lock_done, |
|
.rpc_release = nfs4_lock_release, |
|
}; |
|
|
|
static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) |
|
{ |
|
switch (error) { |
|
case -NFS4ERR_ADMIN_REVOKED: |
|
case -NFS4ERR_EXPIRED: |
|
case -NFS4ERR_BAD_STATEID: |
|
lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; |
|
if (new_lock_owner != 0 || |
|
test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) |
|
nfs4_schedule_stateid_recovery(server, lsp->ls_state); |
|
break; |
|
case -NFS4ERR_STALE_STATEID: |
|
lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; |
|
nfs4_schedule_lease_recovery(server->nfs_client); |
|
} |
|
} |
|
|
|
static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) |
|
{ |
|
struct nfs4_lockdata *data; |
|
struct rpc_task *task; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], |
|
.rpc_cred = state->owner->so_cred, |
|
}; |
|
struct rpc_task_setup task_setup_data = { |
|
.rpc_client = NFS_CLIENT(state->inode), |
|
.rpc_message = &msg, |
|
.callback_ops = &nfs4_lock_ops, |
|
.workqueue = nfsiod_workqueue, |
|
.flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, |
|
}; |
|
int ret; |
|
|
|
dprintk("%s: begin!\n", __func__); |
|
data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), |
|
fl->fl_u.nfs4_fl.owner, |
|
recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); |
|
if (data == NULL) |
|
return -ENOMEM; |
|
if (IS_SETLKW(cmd)) |
|
data->arg.block = 1; |
|
nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, |
|
recovery_type > NFS_LOCK_NEW); |
|
msg.rpc_argp = &data->arg; |
|
msg.rpc_resp = &data->res; |
|
task_setup_data.callback_data = data; |
|
if (recovery_type > NFS_LOCK_NEW) { |
|
if (recovery_type == NFS_LOCK_RECLAIM) |
|
data->arg.reclaim = NFS_LOCK_RECLAIM; |
|
} else |
|
data->arg.new_lock = 1; |
|
task = rpc_run_task(&task_setup_data); |
|
if (IS_ERR(task)) |
|
return PTR_ERR(task); |
|
ret = rpc_wait_for_completion_task(task); |
|
if (ret == 0) { |
|
ret = data->rpc_status; |
|
if (ret) |
|
nfs4_handle_setlk_error(data->server, data->lsp, |
|
data->arg.new_lock_owner, ret); |
|
} else |
|
data->cancelled = true; |
|
trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); |
|
rpc_put_task(task); |
|
dprintk("%s: done, ret = %d!\n", __func__, ret); |
|
return ret; |
|
} |
|
|
|
static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(state->inode); |
|
struct nfs4_exception exception = { |
|
.inode = state->inode, |
|
}; |
|
int err; |
|
|
|
do { |
|
/* Cache the lock if possible... */ |
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
|
return 0; |
|
err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); |
|
if (err != -NFS4ERR_DELAY) |
|
break; |
|
nfs4_handle_exception(server, err, &exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(state->inode); |
|
struct nfs4_exception exception = { |
|
.inode = state->inode, |
|
}; |
|
int err; |
|
|
|
err = nfs4_set_lock_state(state, request); |
|
if (err != 0) |
|
return err; |
|
if (!recover_lost_locks) { |
|
set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); |
|
return 0; |
|
} |
|
do { |
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
|
return 0; |
|
err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); |
|
switch (err) { |
|
default: |
|
goto out; |
|
case -NFS4ERR_GRACE: |
|
case -NFS4ERR_DELAY: |
|
nfs4_handle_exception(server, err, &exception); |
|
err = 0; |
|
} |
|
} while (exception.retry); |
|
out: |
|
return err; |
|
} |
|
|
|
#if defined(CONFIG_NFS_V4_1) |
|
static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) |
|
{ |
|
struct nfs4_lock_state *lsp; |
|
int status; |
|
|
|
status = nfs4_set_lock_state(state, request); |
|
if (status != 0) |
|
return status; |
|
lsp = request->fl_u.nfs4_fl.owner; |
|
if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || |
|
test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) |
|
return 0; |
|
return nfs4_lock_expired(state, request); |
|
} |
|
#endif |
|
|
|
static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
|
{ |
|
struct nfs_inode *nfsi = NFS_I(state->inode); |
|
struct nfs4_state_owner *sp = state->owner; |
|
unsigned char fl_flags = request->fl_flags; |
|
int status; |
|
|
|
request->fl_flags |= FL_ACCESS; |
|
status = locks_lock_inode_wait(state->inode, request); |
|
if (status < 0) |
|
goto out; |
|
mutex_lock(&sp->so_delegreturn_mutex); |
|
down_read(&nfsi->rwsem); |
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
|
/* Yes: cache locks! */ |
|
/* ...but avoid races with delegation recall... */ |
|
request->fl_flags = fl_flags & ~FL_SLEEP; |
|
status = locks_lock_inode_wait(state->inode, request); |
|
up_read(&nfsi->rwsem); |
|
mutex_unlock(&sp->so_delegreturn_mutex); |
|
goto out; |
|
} |
|
up_read(&nfsi->rwsem); |
|
mutex_unlock(&sp->so_delegreturn_mutex); |
|
status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); |
|
out: |
|
request->fl_flags = fl_flags; |
|
return status; |
|
} |
|
|
|
static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
|
{ |
|
struct nfs4_exception exception = { |
|
.state = state, |
|
.inode = state->inode, |
|
.interruptible = true, |
|
}; |
|
int err; |
|
|
|
do { |
|
err = _nfs4_proc_setlk(state, cmd, request); |
|
if (err == -NFS4ERR_DENIED) |
|
err = -EAGAIN; |
|
err = nfs4_handle_exception(NFS_SERVER(state->inode), |
|
err, &exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
#define NFS4_LOCK_MINTIMEOUT (1 * HZ) |
|
#define NFS4_LOCK_MAXTIMEOUT (30 * HZ) |
|
|
|
static int |
|
nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, |
|
struct file_lock *request) |
|
{ |
|
int status = -ERESTARTSYS; |
|
unsigned long timeout = NFS4_LOCK_MINTIMEOUT; |
|
|
|
while(!signalled()) { |
|
status = nfs4_proc_setlk(state, cmd, request); |
|
if ((status != -EAGAIN) || IS_SETLK(cmd)) |
|
break; |
|
freezable_schedule_timeout_interruptible(timeout); |
|
timeout *= 2; |
|
timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); |
|
status = -ERESTARTSYS; |
|
} |
|
return status; |
|
} |
|
|
|
#ifdef CONFIG_NFS_V4_1 |
|
struct nfs4_lock_waiter { |
|
struct task_struct *task; |
|
struct inode *inode; |
|
struct nfs_lowner *owner; |
|
}; |
|
|
|
static int |
|
nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) |
|
{ |
|
int ret; |
|
struct nfs4_lock_waiter *waiter = wait->private; |
|
|
|
/* NULL key means to wake up everyone */ |
|
if (key) { |
|
struct cb_notify_lock_args *cbnl = key; |
|
struct nfs_lowner *lowner = &cbnl->cbnl_owner, |
|
*wowner = waiter->owner; |
|
|
|
/* Only wake if the callback was for the same owner. */ |
|
if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) |
|
return 0; |
|
|
|
/* Make sure it's for the right inode */ |
|
if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) |
|
return 0; |
|
} |
|
|
|
/* override "private" so we can use default_wake_function */ |
|
wait->private = waiter->task; |
|
ret = woken_wake_function(wait, mode, flags, key); |
|
if (ret) |
|
list_del_init(&wait->entry); |
|
wait->private = waiter; |
|
return ret; |
|
} |
|
|
|
static int |
|
nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
|
{ |
|
int status = -ERESTARTSYS; |
|
struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; |
|
struct nfs_server *server = NFS_SERVER(state->inode); |
|
struct nfs_client *clp = server->nfs_client; |
|
wait_queue_head_t *q = &clp->cl_lock_waitq; |
|
struct nfs_lowner owner = { .clientid = clp->cl_clientid, |
|
.id = lsp->ls_seqid.owner_id, |
|
.s_dev = server->s_dev }; |
|
struct nfs4_lock_waiter waiter = { .task = current, |
|
.inode = state->inode, |
|
.owner = &owner}; |
|
wait_queue_entry_t wait; |
|
|
|
/* Don't bother with waitqueue if we don't expect a callback */ |
|
if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) |
|
return nfs4_retry_setlk_simple(state, cmd, request); |
|
|
|
init_wait(&wait); |
|
wait.private = &waiter; |
|
wait.func = nfs4_wake_lock_waiter; |
|
|
|
while(!signalled()) { |
|
add_wait_queue(q, &wait); |
|
status = nfs4_proc_setlk(state, cmd, request); |
|
if ((status != -EAGAIN) || IS_SETLK(cmd)) { |
|
finish_wait(q, &wait); |
|
break; |
|
} |
|
|
|
status = -ERESTARTSYS; |
|
freezer_do_not_count(); |
|
wait_woken(&wait, TASK_INTERRUPTIBLE, NFS4_LOCK_MAXTIMEOUT); |
|
freezer_count(); |
|
finish_wait(q, &wait); |
|
} |
|
|
|
return status; |
|
} |
|
#else /* !CONFIG_NFS_V4_1 */ |
|
static inline int |
|
nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
|
{ |
|
return nfs4_retry_setlk_simple(state, cmd, request); |
|
} |
|
#endif |
|
|
|
static int |
|
nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) |
|
{ |
|
struct nfs_open_context *ctx; |
|
struct nfs4_state *state; |
|
int status; |
|
|
|
/* verify open state */ |
|
ctx = nfs_file_open_context(filp); |
|
state = ctx->state; |
|
|
|
if (IS_GETLK(cmd)) { |
|
if (state != NULL) |
|
return nfs4_proc_getlk(state, F_GETLK, request); |
|
return 0; |
|
} |
|
|
|
if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) |
|
return -EINVAL; |
|
|
|
if (request->fl_type == F_UNLCK) { |
|
if (state != NULL) |
|
return nfs4_proc_unlck(state, cmd, request); |
|
return 0; |
|
} |
|
|
|
if (state == NULL) |
|
return -ENOLCK; |
|
|
|
if ((request->fl_flags & FL_POSIX) && |
|
!test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) |
|
return -ENOLCK; |
|
|
|
/* |
|
* Don't rely on the VFS having checked the file open mode, |
|
* since it won't do this for flock() locks. |
|
*/ |
|
switch (request->fl_type) { |
|
case F_RDLCK: |
|
if (!(filp->f_mode & FMODE_READ)) |
|
return -EBADF; |
|
break; |
|
case F_WRLCK: |
|
if (!(filp->f_mode & FMODE_WRITE)) |
|
return -EBADF; |
|
} |
|
|
|
status = nfs4_set_lock_state(state, request); |
|
if (status != 0) |
|
return status; |
|
|
|
return nfs4_retry_setlk(state, cmd, request); |
|
} |
|
|
|
int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(state->inode); |
|
int err; |
|
|
|
err = nfs4_set_lock_state(state, fl); |
|
if (err != 0) |
|
return err; |
|
do { |
|
err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); |
|
if (err != -NFS4ERR_DELAY) |
|
break; |
|
ssleep(1); |
|
} while (err == -NFS4ERR_DELAY); |
|
return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); |
|
} |
|
|
|
struct nfs_release_lockowner_data { |
|
struct nfs4_lock_state *lsp; |
|
struct nfs_server *server; |
|
struct nfs_release_lockowner_args args; |
|
struct nfs_release_lockowner_res res; |
|
unsigned long timestamp; |
|
}; |
|
|
|
static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs_release_lockowner_data *data = calldata; |
|
struct nfs_server *server = data->server; |
|
nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, |
|
&data->res.seq_res, task); |
|
data->args.lock_owner.clientid = server->nfs_client->cl_clientid; |
|
data->timestamp = jiffies; |
|
} |
|
|
|
static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs_release_lockowner_data *data = calldata; |
|
struct nfs_server *server = data->server; |
|
|
|
nfs40_sequence_done(task, &data->res.seq_res); |
|
|
|
switch (task->tk_status) { |
|
case 0: |
|
renew_lease(server, data->timestamp); |
|
break; |
|
case -NFS4ERR_STALE_CLIENTID: |
|
case -NFS4ERR_EXPIRED: |
|
nfs4_schedule_lease_recovery(server->nfs_client); |
|
break; |
|
case -NFS4ERR_LEASE_MOVED: |
|
case -NFS4ERR_DELAY: |
|
if (nfs4_async_handle_error(task, server, |
|
NULL, NULL) == -EAGAIN) |
|
rpc_restart_call_prepare(task); |
|
} |
|
} |
|
|
|
static void nfs4_release_lockowner_release(void *calldata) |
|
{ |
|
struct nfs_release_lockowner_data *data = calldata; |
|
nfs4_free_lock_state(data->server, data->lsp); |
|
kfree(calldata); |
|
} |
|
|
|
static const struct rpc_call_ops nfs4_release_lockowner_ops = { |
|
.rpc_call_prepare = nfs4_release_lockowner_prepare, |
|
.rpc_call_done = nfs4_release_lockowner_done, |
|
.rpc_release = nfs4_release_lockowner_release, |
|
}; |
|
|
|
static void |
|
nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) |
|
{ |
|
struct nfs_release_lockowner_data *data; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], |
|
}; |
|
|
|
if (server->nfs_client->cl_mvops->minor_version != 0) |
|
return; |
|
|
|
data = kmalloc(sizeof(*data), GFP_NOFS); |
|
if (!data) |
|
return; |
|
data->lsp = lsp; |
|
data->server = server; |
|
data->args.lock_owner.clientid = server->nfs_client->cl_clientid; |
|
data->args.lock_owner.id = lsp->ls_seqid.owner_id; |
|
data->args.lock_owner.s_dev = server->s_dev; |
|
|
|
msg.rpc_argp = &data->args; |
|
msg.rpc_resp = &data->res; |
|
nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); |
|
rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); |
|
} |
|
|
|
#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
|
|
|
static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, |
|
struct dentry *unused, struct inode *inode, |
|
const char *key, const void *buf, |
|
size_t buflen, int flags) |
|
{ |
|
return nfs4_proc_set_acl(inode, buf, buflen); |
|
} |
|
|
|
static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, |
|
struct dentry *unused, struct inode *inode, |
|
const char *key, void *buf, size_t buflen) |
|
{ |
|
return nfs4_proc_get_acl(inode, buf, buflen); |
|
} |
|
|
|
static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) |
|
{ |
|
return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))); |
|
} |
|
|
|
#ifdef CONFIG_NFS_V4_SECURITY_LABEL |
|
|
|
static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, |
|
struct dentry *unused, struct inode *inode, |
|
const char *key, const void *buf, |
|
size_t buflen, int flags) |
|
{ |
|
if (security_ismaclabel(key)) |
|
return nfs4_set_security_label(inode, buf, buflen); |
|
|
|
return -EOPNOTSUPP; |
|
} |
|
|
|
static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, |
|
struct dentry *unused, struct inode *inode, |
|
const char *key, void *buf, size_t buflen) |
|
{ |
|
if (security_ismaclabel(key)) |
|
return nfs4_get_security_label(inode, buf, buflen); |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
static ssize_t |
|
nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) |
|
{ |
|
int len = 0; |
|
|
|
if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { |
|
len = security_inode_listsecurity(inode, list, list_len); |
|
if (len >= 0 && list_len && len > list_len) |
|
return -ERANGE; |
|
} |
|
return len; |
|
} |
|
|
|
static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { |
|
.prefix = XATTR_SECURITY_PREFIX, |
|
.get = nfs4_xattr_get_nfs4_label, |
|
.set = nfs4_xattr_set_nfs4_label, |
|
}; |
|
|
|
#else |
|
|
|
static ssize_t |
|
nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) |
|
{ |
|
return 0; |
|
} |
|
|
|
#endif |
|
|
|
#ifdef CONFIG_NFS_V4_2 |
|
static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler, |
|
struct dentry *unused, struct inode *inode, |
|
const char *key, const void *buf, |
|
size_t buflen, int flags) |
|
{ |
|
struct nfs_access_entry cache; |
|
int ret; |
|
|
|
if (!nfs_server_capable(inode, NFS_CAP_XATTR)) |
|
return -EOPNOTSUPP; |
|
|
|
/* |
|
* There is no mapping from the MAY_* flags to the NFS_ACCESS_XA* |
|
* flags right now. Handling of xattr operations use the normal |
|
* file read/write permissions. |
|
* |
|
* Just in case the server has other ideas (which RFC 8276 allows), |
|
* do a cached access check for the XA* flags to possibly avoid |
|
* doing an RPC and getting EACCES back. |
|
*/ |
|
if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) { |
|
if (!(cache.mask & NFS_ACCESS_XAWRITE)) |
|
return -EACCES; |
|
} |
|
|
|
if (buf == NULL) { |
|
ret = nfs42_proc_removexattr(inode, key); |
|
if (!ret) |
|
nfs4_xattr_cache_remove(inode, key); |
|
} else { |
|
ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags); |
|
if (!ret) |
|
nfs4_xattr_cache_add(inode, key, buf, NULL, buflen); |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler, |
|
struct dentry *unused, struct inode *inode, |
|
const char *key, void *buf, size_t buflen) |
|
{ |
|
struct nfs_access_entry cache; |
|
ssize_t ret; |
|
|
|
if (!nfs_server_capable(inode, NFS_CAP_XATTR)) |
|
return -EOPNOTSUPP; |
|
|
|
if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) { |
|
if (!(cache.mask & NFS_ACCESS_XAREAD)) |
|
return -EACCES; |
|
} |
|
|
|
ret = nfs_revalidate_inode(NFS_SERVER(inode), inode); |
|
if (ret) |
|
return ret; |
|
|
|
ret = nfs4_xattr_cache_get(inode, key, buf, buflen); |
|
if (ret >= 0 || (ret < 0 && ret != -ENOENT)) |
|
return ret; |
|
|
|
ret = nfs42_proc_getxattr(inode, key, buf, buflen); |
|
|
|
return ret; |
|
} |
|
|
|
static ssize_t |
|
nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) |
|
{ |
|
u64 cookie; |
|
bool eof; |
|
ssize_t ret, size; |
|
char *buf; |
|
size_t buflen; |
|
struct nfs_access_entry cache; |
|
|
|
if (!nfs_server_capable(inode, NFS_CAP_XATTR)) |
|
return 0; |
|
|
|
if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) { |
|
if (!(cache.mask & NFS_ACCESS_XALIST)) |
|
return 0; |
|
} |
|
|
|
ret = nfs_revalidate_inode(NFS_SERVER(inode), inode); |
|
if (ret) |
|
return ret; |
|
|
|
ret = nfs4_xattr_cache_list(inode, list, list_len); |
|
if (ret >= 0 || (ret < 0 && ret != -ENOENT)) |
|
return ret; |
|
|
|
cookie = 0; |
|
eof = false; |
|
buflen = list_len ? list_len : XATTR_LIST_MAX; |
|
buf = list_len ? list : NULL; |
|
size = 0; |
|
|
|
while (!eof) { |
|
ret = nfs42_proc_listxattrs(inode, buf, buflen, |
|
&cookie, &eof); |
|
if (ret < 0) |
|
return ret; |
|
|
|
if (list_len) { |
|
buf += ret; |
|
buflen -= ret; |
|
} |
|
size += ret; |
|
} |
|
|
|
if (list_len) |
|
nfs4_xattr_cache_set_list(inode, list, size); |
|
|
|
return size; |
|
} |
|
|
|
#else |
|
|
|
static ssize_t |
|
nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) |
|
{ |
|
return 0; |
|
} |
|
#endif /* CONFIG_NFS_V4_2 */ |
|
|
|
/* |
|
* nfs_fhget will use either the mounted_on_fileid or the fileid |
|
*/ |
|
static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) |
|
{ |
|
if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || |
|
(fattr->valid & NFS_ATTR_FATTR_FILEID)) && |
|
(fattr->valid & NFS_ATTR_FATTR_FSID) && |
|
(fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) |
|
return; |
|
|
|
fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | |
|
NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; |
|
fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; |
|
fattr->nlink = 2; |
|
} |
|
|
|
static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, |
|
const struct qstr *name, |
|
struct nfs4_fs_locations *fs_locations, |
|
struct page *page) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(dir); |
|
u32 bitmask[3]; |
|
struct nfs4_fs_locations_arg args = { |
|
.dir_fh = NFS_FH(dir), |
|
.name = name, |
|
.page = page, |
|
.bitmask = bitmask, |
|
}; |
|
struct nfs4_fs_locations_res res = { |
|
.fs_locations = fs_locations, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
}; |
|
int status; |
|
|
|
dprintk("%s: start\n", __func__); |
|
|
|
bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; |
|
bitmask[1] = nfs4_fattr_bitmap[1]; |
|
|
|
/* Ask for the fileid of the absent filesystem if mounted_on_fileid |
|
* is not supported */ |
|
if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) |
|
bitmask[0] &= ~FATTR4_WORD0_FILEID; |
|
else |
|
bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; |
|
|
|
nfs_fattr_init(&fs_locations->fattr); |
|
fs_locations->server = server; |
|
fs_locations->nlocations = 0; |
|
status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); |
|
dprintk("%s: returned status = %d\n", __func__, status); |
|
return status; |
|
} |
|
|
|
int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, |
|
const struct qstr *name, |
|
struct nfs4_fs_locations *fs_locations, |
|
struct page *page) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int err; |
|
do { |
|
err = _nfs4_proc_fs_locations(client, dir, name, |
|
fs_locations, page); |
|
trace_nfs4_get_fs_locations(dir, name, err); |
|
err = nfs4_handle_exception(NFS_SERVER(dir), err, |
|
&exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
/* |
|
* This operation also signals the server that this client is |
|
* performing migration recovery. The server can stop returning |
|
* NFS4ERR_LEASE_MOVED to this client. A RENEW operation is |
|
* appended to this compound to identify the client ID which is |
|
* performing recovery. |
|
*/ |
|
static int _nfs40_proc_get_locations(struct inode *inode, |
|
struct nfs4_fs_locations *locations, |
|
struct page *page, const struct cred *cred) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
struct rpc_clnt *clnt = server->client; |
|
u32 bitmask[2] = { |
|
[0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
|
}; |
|
struct nfs4_fs_locations_arg args = { |
|
.clientid = server->nfs_client->cl_clientid, |
|
.fh = NFS_FH(inode), |
|
.page = page, |
|
.bitmask = bitmask, |
|
.migration = 1, /* skip LOOKUP */ |
|
.renew = 1, /* append RENEW */ |
|
}; |
|
struct nfs4_fs_locations_res res = { |
|
.fs_locations = locations, |
|
.migration = 1, |
|
.renew = 1, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
.rpc_cred = cred, |
|
}; |
|
unsigned long now = jiffies; |
|
int status; |
|
|
|
nfs_fattr_init(&locations->fattr); |
|
locations->server = server; |
|
locations->nlocations = 0; |
|
|
|
nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); |
|
status = nfs4_call_sync_sequence(clnt, server, &msg, |
|
&args.seq_args, &res.seq_res); |
|
if (status) |
|
return status; |
|
|
|
renew_lease(server, now); |
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_NFS_V4_1 |
|
|
|
/* |
|
* This operation also signals the server that this client is |
|
* performing migration recovery. The server can stop asserting |
|
* SEQ4_STATUS_LEASE_MOVED for this client. The client ID |
|
* performing this operation is identified in the SEQUENCE |
|
* operation in this compound. |
|
* |
|
* When the client supports GETATTR(fs_locations_info), it can |
|
* be plumbed in here. |
|
*/ |
|
static int _nfs41_proc_get_locations(struct inode *inode, |
|
struct nfs4_fs_locations *locations, |
|
struct page *page, const struct cred *cred) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
struct rpc_clnt *clnt = server->client; |
|
u32 bitmask[2] = { |
|
[0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
|
}; |
|
struct nfs4_fs_locations_arg args = { |
|
.fh = NFS_FH(inode), |
|
.page = page, |
|
.bitmask = bitmask, |
|
.migration = 1, /* skip LOOKUP */ |
|
}; |
|
struct nfs4_fs_locations_res res = { |
|
.fs_locations = locations, |
|
.migration = 1, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
.rpc_cred = cred, |
|
}; |
|
int status; |
|
|
|
nfs_fattr_init(&locations->fattr); |
|
locations->server = server; |
|
locations->nlocations = 0; |
|
|
|
nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); |
|
status = nfs4_call_sync_sequence(clnt, server, &msg, |
|
&args.seq_args, &res.seq_res); |
|
if (status == NFS4_OK && |
|
res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) |
|
status = -NFS4ERR_LEASE_MOVED; |
|
return status; |
|
} |
|
|
|
#endif /* CONFIG_NFS_V4_1 */ |
|
|
|
/** |
|
* nfs4_proc_get_locations - discover locations for a migrated FSID |
|
* @inode: inode on FSID that is migrating |
|
* @locations: result of query |
|
* @page: buffer |
|
* @cred: credential to use for this operation |
|
* |
|
* Returns NFS4_OK on success, a negative NFS4ERR status code if the |
|
* operation failed, or a negative errno if a local error occurred. |
|
* |
|
* On success, "locations" is filled in, but if the server has |
|
* no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not |
|
* asserted. |
|
* |
|
* -NFS4ERR_LEASE_MOVED is returned if the server still has leases |
|
* from this client that require migration recovery. |
|
*/ |
|
int nfs4_proc_get_locations(struct inode *inode, |
|
struct nfs4_fs_locations *locations, |
|
struct page *page, const struct cred *cred) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
struct nfs_client *clp = server->nfs_client; |
|
const struct nfs4_mig_recovery_ops *ops = |
|
clp->cl_mvops->mig_recovery_ops; |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int status; |
|
|
|
dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, |
|
(unsigned long long)server->fsid.major, |
|
(unsigned long long)server->fsid.minor, |
|
clp->cl_hostname); |
|
nfs_display_fhandle(NFS_FH(inode), __func__); |
|
|
|
do { |
|
status = ops->get_locations(inode, locations, page, cred); |
|
if (status != -NFS4ERR_DELAY) |
|
break; |
|
nfs4_handle_exception(server, status, &exception); |
|
} while (exception.retry); |
|
return status; |
|
} |
|
|
|
/* |
|
* This operation also signals the server that this client is |
|
* performing "lease moved" recovery. The server can stop |
|
* returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation |
|
* is appended to this compound to identify the client ID which is |
|
* performing recovery. |
|
*/ |
|
static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; |
|
struct rpc_clnt *clnt = server->client; |
|
struct nfs4_fsid_present_arg args = { |
|
.fh = NFS_FH(inode), |
|
.clientid = clp->cl_clientid, |
|
.renew = 1, /* append RENEW */ |
|
}; |
|
struct nfs4_fsid_present_res res = { |
|
.renew = 1, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
.rpc_cred = cred, |
|
}; |
|
unsigned long now = jiffies; |
|
int status; |
|
|
|
res.fh = nfs_alloc_fhandle(); |
|
if (res.fh == NULL) |
|
return -ENOMEM; |
|
|
|
nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); |
|
status = nfs4_call_sync_sequence(clnt, server, &msg, |
|
&args.seq_args, &res.seq_res); |
|
nfs_free_fhandle(res.fh); |
|
if (status) |
|
return status; |
|
|
|
do_renew_lease(clp, now); |
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_NFS_V4_1 |
|
|
|
/* |
|
* This operation also signals the server that this client is |
|
* performing "lease moved" recovery. The server can stop asserting |
|
* SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing |
|
* this operation is identified in the SEQUENCE operation in this |
|
* compound. |
|
*/ |
|
static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
struct rpc_clnt *clnt = server->client; |
|
struct nfs4_fsid_present_arg args = { |
|
.fh = NFS_FH(inode), |
|
}; |
|
struct nfs4_fsid_present_res res = { |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
.rpc_cred = cred, |
|
}; |
|
int status; |
|
|
|
res.fh = nfs_alloc_fhandle(); |
|
if (res.fh == NULL) |
|
return -ENOMEM; |
|
|
|
nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); |
|
status = nfs4_call_sync_sequence(clnt, server, &msg, |
|
&args.seq_args, &res.seq_res); |
|
nfs_free_fhandle(res.fh); |
|
if (status == NFS4_OK && |
|
res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) |
|
status = -NFS4ERR_LEASE_MOVED; |
|
return status; |
|
} |
|
|
|
#endif /* CONFIG_NFS_V4_1 */ |
|
|
|
/** |
|
* nfs4_proc_fsid_present - Is this FSID present or absent on server? |
|
* @inode: inode on FSID to check |
|
* @cred: credential to use for this operation |
|
* |
|
* Server indicates whether the FSID is present, moved, or not |
|
* recognized. This operation is necessary to clear a LEASE_MOVED |
|
* condition for this client ID. |
|
* |
|
* Returns NFS4_OK if the FSID is present on this server, |
|
* -NFS4ERR_MOVED if the FSID is no longer present, a negative |
|
* NFS4ERR code if some error occurred on the server, or a |
|
* negative errno if a local failure occurred. |
|
*/ |
|
int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred) |
|
{ |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
struct nfs_client *clp = server->nfs_client; |
|
const struct nfs4_mig_recovery_ops *ops = |
|
clp->cl_mvops->mig_recovery_ops; |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int status; |
|
|
|
dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, |
|
(unsigned long long)server->fsid.major, |
|
(unsigned long long)server->fsid.minor, |
|
clp->cl_hostname); |
|
nfs_display_fhandle(NFS_FH(inode), __func__); |
|
|
|
do { |
|
status = ops->fsid_present(inode, cred); |
|
if (status != -NFS4ERR_DELAY) |
|
break; |
|
nfs4_handle_exception(server, status, &exception); |
|
} while (exception.retry); |
|
return status; |
|
} |
|
|
|
/* |
|
* If 'use_integrity' is true and the state managment nfs_client |
|
* cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient |
|
* and the machine credential as per RFC3530bis and RFC5661 Security |
|
* Considerations sections. Otherwise, just use the user cred with the |
|
* filesystem's rpc_client. |
|
*/ |
|
static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) |
|
{ |
|
int status; |
|
struct rpc_clnt *clnt = NFS_SERVER(dir)->client; |
|
struct nfs_client *clp = NFS_SERVER(dir)->nfs_client; |
|
struct nfs4_secinfo_arg args = { |
|
.dir_fh = NFS_FH(dir), |
|
.name = name, |
|
}; |
|
struct nfs4_secinfo_res res = { |
|
.flavors = flavors, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
}; |
|
struct nfs4_call_sync_data data = { |
|
.seq_server = NFS_SERVER(dir), |
|
.seq_args = &args.seq_args, |
|
.seq_res = &res.seq_res, |
|
}; |
|
struct rpc_task_setup task_setup = { |
|
.rpc_client = clnt, |
|
.rpc_message = &msg, |
|
.callback_ops = clp->cl_mvops->call_sync_ops, |
|
.callback_data = &data, |
|
.flags = RPC_TASK_NO_ROUND_ROBIN, |
|
}; |
|
const struct cred *cred = NULL; |
|
|
|
if (use_integrity) { |
|
clnt = clp->cl_rpcclient; |
|
task_setup.rpc_client = clnt; |
|
|
|
cred = nfs4_get_clid_cred(clp); |
|
msg.rpc_cred = cred; |
|
} |
|
|
|
dprintk("NFS call secinfo %s\n", name->name); |
|
|
|
nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); |
|
nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); |
|
status = nfs4_call_sync_custom(&task_setup); |
|
|
|
dprintk("NFS reply secinfo: %d\n", status); |
|
|
|
put_cred(cred); |
|
return status; |
|
} |
|
|
|
int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, |
|
struct nfs4_secinfo_flavors *flavors) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int err; |
|
do { |
|
err = -NFS4ERR_WRONGSEC; |
|
|
|
/* try to use integrity protection with machine cred */ |
|
if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) |
|
err = _nfs4_proc_secinfo(dir, name, flavors, true); |
|
|
|
/* |
|
* if unable to use integrity protection, or SECINFO with |
|
* integrity protection returns NFS4ERR_WRONGSEC (which is |
|
* disallowed by spec, but exists in deployed servers) use |
|
* the current filesystem's rpc_client and the user cred. |
|
*/ |
|
if (err == -NFS4ERR_WRONGSEC) |
|
err = _nfs4_proc_secinfo(dir, name, flavors, false); |
|
|
|
trace_nfs4_secinfo(dir, name, err); |
|
err = nfs4_handle_exception(NFS_SERVER(dir), err, |
|
&exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
#ifdef CONFIG_NFS_V4_1 |
|
/* |
|
* Check the exchange flags returned by the server for invalid flags, having |
|
* both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or |
|
* DS flags set. |
|
*/ |
|
static int nfs4_check_cl_exchange_flags(u32 flags, u32 version) |
|
{ |
|
if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R)) |
|
goto out_inval; |
|
else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R)) |
|
goto out_inval; |
|
if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && |
|
(flags & EXCHGID4_FLAG_USE_NON_PNFS)) |
|
goto out_inval; |
|
if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) |
|
goto out_inval; |
|
return NFS_OK; |
|
out_inval: |
|
return -NFS4ERR_INVAL; |
|
} |
|
|
|
static bool |
|
nfs41_same_server_scope(struct nfs41_server_scope *a, |
|
struct nfs41_server_scope *b) |
|
{ |
|
if (a->server_scope_sz != b->server_scope_sz) |
|
return false; |
|
return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; |
|
} |
|
|
|
static void |
|
nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp; |
|
struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp; |
|
struct nfs_client *clp = args->client; |
|
|
|
switch (task->tk_status) { |
|
case -NFS4ERR_BADSESSION: |
|
case -NFS4ERR_DEADSESSION: |
|
nfs4_schedule_session_recovery(clp->cl_session, |
|
task->tk_status); |
|
} |
|
if (args->dir == NFS4_CDFC4_FORE_OR_BOTH && |
|
res->dir != NFS4_CDFS4_BOTH) { |
|
rpc_task_close_connection(task); |
|
if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES) |
|
rpc_restart_call(task); |
|
} |
|
} |
|
|
|
static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { |
|
.rpc_call_done = nfs4_bind_one_conn_to_session_done, |
|
}; |
|
|
|
/* |
|
* nfs4_proc_bind_one_conn_to_session() |
|
* |
|
* The 4.1 client currently uses the same TCP connection for the |
|
* fore and backchannel. |
|
*/ |
|
static |
|
int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, |
|
struct rpc_xprt *xprt, |
|
struct nfs_client *clp, |
|
const struct cred *cred) |
|
{ |
|
int status; |
|
struct nfs41_bind_conn_to_session_args args = { |
|
.client = clp, |
|
.dir = NFS4_CDFC4_FORE_OR_BOTH, |
|
.retries = 0, |
|
}; |
|
struct nfs41_bind_conn_to_session_res res; |
|
struct rpc_message msg = { |
|
.rpc_proc = |
|
&nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
.rpc_cred = cred, |
|
}; |
|
struct rpc_task_setup task_setup_data = { |
|
.rpc_client = clnt, |
|
.rpc_xprt = xprt, |
|
.callback_ops = &nfs4_bind_one_conn_to_session_ops, |
|
.rpc_message = &msg, |
|
.flags = RPC_TASK_TIMEOUT, |
|
}; |
|
struct rpc_task *task; |
|
|
|
nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); |
|
if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) |
|
args.dir = NFS4_CDFC4_FORE; |
|
|
|
/* Do not set the backchannel flag unless this is clnt->cl_xprt */ |
|
if (xprt != rcu_access_pointer(clnt->cl_xprt)) |
|
args.dir = NFS4_CDFC4_FORE; |
|
|
|
task = rpc_run_task(&task_setup_data); |
|
if (!IS_ERR(task)) { |
|
status = task->tk_status; |
|
rpc_put_task(task); |
|
} else |
|
status = PTR_ERR(task); |
|
trace_nfs4_bind_conn_to_session(clp, status); |
|
if (status == 0) { |
|
if (memcmp(res.sessionid.data, |
|
clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { |
|
dprintk("NFS: %s: Session ID mismatch\n", __func__); |
|
return -EIO; |
|
} |
|
if ((res.dir & args.dir) != res.dir || res.dir == 0) { |
|
dprintk("NFS: %s: Unexpected direction from server\n", |
|
__func__); |
|
return -EIO; |
|
} |
|
if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { |
|
dprintk("NFS: %s: Server returned RDMA mode = true\n", |
|
__func__); |
|
return -EIO; |
|
} |
|
} |
|
|
|
return status; |
|
} |
|
|
|
struct rpc_bind_conn_calldata { |
|
struct nfs_client *clp; |
|
const struct cred *cred; |
|
}; |
|
|
|
static int |
|
nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, |
|
struct rpc_xprt *xprt, |
|
void *calldata) |
|
{ |
|
struct rpc_bind_conn_calldata *p = calldata; |
|
|
|
return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); |
|
} |
|
|
|
int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred) |
|
{ |
|
struct rpc_bind_conn_calldata data = { |
|
.clp = clp, |
|
.cred = cred, |
|
}; |
|
return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, |
|
nfs4_proc_bind_conn_to_session_callback, &data); |
|
} |
|
|
|
/* |
|
* Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map |
|
* and operations we'd like to see to enable certain features in the allow map |
|
*/ |
|
static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { |
|
.how = SP4_MACH_CRED, |
|
.enforce.u.words = { |
|
[1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | |
|
1 << (OP_EXCHANGE_ID - 32) | |
|
1 << (OP_CREATE_SESSION - 32) | |
|
1 << (OP_DESTROY_SESSION - 32) | |
|
1 << (OP_DESTROY_CLIENTID - 32) |
|
}, |
|
.allow.u.words = { |
|
[0] = 1 << (OP_CLOSE) | |
|
1 << (OP_OPEN_DOWNGRADE) | |
|
1 << (OP_LOCKU) | |
|
1 << (OP_DELEGRETURN) | |
|
1 << (OP_COMMIT), |
|
[1] = 1 << (OP_SECINFO - 32) | |
|
1 << (OP_SECINFO_NO_NAME - 32) | |
|
1 << (OP_LAYOUTRETURN - 32) | |
|
1 << (OP_TEST_STATEID - 32) | |
|
1 << (OP_FREE_STATEID - 32) | |
|
1 << (OP_WRITE - 32) |
|
} |
|
}; |
|
|
|
/* |
|
* Select the state protection mode for client `clp' given the server results |
|
* from exchange_id in `sp'. |
|
* |
|
* Returns 0 on success, negative errno otherwise. |
|
*/ |
|
static int nfs4_sp4_select_mode(struct nfs_client *clp, |
|
struct nfs41_state_protection *sp) |
|
{ |
|
static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { |
|
[1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | |
|
1 << (OP_EXCHANGE_ID - 32) | |
|
1 << (OP_CREATE_SESSION - 32) | |
|
1 << (OP_DESTROY_SESSION - 32) | |
|
1 << (OP_DESTROY_CLIENTID - 32) |
|
}; |
|
unsigned long flags = 0; |
|
unsigned int i; |
|
int ret = 0; |
|
|
|
if (sp->how == SP4_MACH_CRED) { |
|
/* Print state protect result */ |
|
dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); |
|
for (i = 0; i <= LAST_NFS4_OP; i++) { |
|
if (test_bit(i, sp->enforce.u.longs)) |
|
dfprintk(MOUNT, " enforce op %d\n", i); |
|
if (test_bit(i, sp->allow.u.longs)) |
|
dfprintk(MOUNT, " allow op %d\n", i); |
|
} |
|
|
|
/* make sure nothing is on enforce list that isn't supported */ |
|
for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { |
|
if (sp->enforce.u.words[i] & ~supported_enforce[i]) { |
|
dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
} |
|
|
|
/* |
|
* Minimal mode - state operations are allowed to use machine |
|
* credential. Note this already happens by default, so the |
|
* client doesn't have to do anything more than the negotiation. |
|
* |
|
* NOTE: we don't care if EXCHANGE_ID is in the list - |
|
* we're already using the machine cred for exchange_id |
|
* and will never use a different cred. |
|
*/ |
|
if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && |
|
test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && |
|
test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && |
|
test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { |
|
dfprintk(MOUNT, "sp4_mach_cred:\n"); |
|
dfprintk(MOUNT, " minimal mode enabled\n"); |
|
__set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); |
|
} else { |
|
dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); |
|
ret = -EINVAL; |
|
goto out; |
|
} |
|
|
|
if (test_bit(OP_CLOSE, sp->allow.u.longs) && |
|
test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && |
|
test_bit(OP_DELEGRETURN, sp->allow.u.longs) && |
|
test_bit(OP_LOCKU, sp->allow.u.longs)) { |
|
dfprintk(MOUNT, " cleanup mode enabled\n"); |
|
__set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); |
|
} |
|
|
|
if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { |
|
dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); |
|
__set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); |
|
} |
|
|
|
if (test_bit(OP_SECINFO, sp->allow.u.longs) && |
|
test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { |
|
dfprintk(MOUNT, " secinfo mode enabled\n"); |
|
__set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); |
|
} |
|
|
|
if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && |
|
test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { |
|
dfprintk(MOUNT, " stateid mode enabled\n"); |
|
__set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); |
|
} |
|
|
|
if (test_bit(OP_WRITE, sp->allow.u.longs)) { |
|
dfprintk(MOUNT, " write mode enabled\n"); |
|
__set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); |
|
} |
|
|
|
if (test_bit(OP_COMMIT, sp->allow.u.longs)) { |
|
dfprintk(MOUNT, " commit mode enabled\n"); |
|
__set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); |
|
} |
|
} |
|
out: |
|
clp->cl_sp4_flags = flags; |
|
return ret; |
|
} |
|
|
|
struct nfs41_exchange_id_data { |
|
struct nfs41_exchange_id_res res; |
|
struct nfs41_exchange_id_args args; |
|
}; |
|
|
|
static void nfs4_exchange_id_release(void *data) |
|
{ |
|
struct nfs41_exchange_id_data *cdata = |
|
(struct nfs41_exchange_id_data *)data; |
|
|
|
nfs_put_client(cdata->args.client); |
|
kfree(cdata->res.impl_id); |
|
kfree(cdata->res.server_scope); |
|
kfree(cdata->res.server_owner); |
|
kfree(cdata); |
|
} |
|
|
|
static const struct rpc_call_ops nfs4_exchange_id_call_ops = { |
|
.rpc_release = nfs4_exchange_id_release, |
|
}; |
|
|
|
/* |
|
* _nfs4_proc_exchange_id() |
|
* |
|
* Wrapper for EXCHANGE_ID operation. |
|
*/ |
|
static struct rpc_task * |
|
nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred, |
|
u32 sp4_how, struct rpc_xprt *xprt) |
|
{ |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], |
|
.rpc_cred = cred, |
|
}; |
|
struct rpc_task_setup task_setup_data = { |
|
.rpc_client = clp->cl_rpcclient, |
|
.callback_ops = &nfs4_exchange_id_call_ops, |
|
.rpc_message = &msg, |
|
.flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, |
|
}; |
|
struct nfs41_exchange_id_data *calldata; |
|
int status; |
|
|
|
if (!refcount_inc_not_zero(&clp->cl_count)) |
|
return ERR_PTR(-EIO); |
|
|
|
status = -ENOMEM; |
|
calldata = kzalloc(sizeof(*calldata), GFP_NOFS); |
|
if (!calldata) |
|
goto out; |
|
|
|
nfs4_init_boot_verifier(clp, &calldata->args.verifier); |
|
|
|
status = nfs4_init_uniform_client_string(clp); |
|
if (status) |
|
goto out_calldata; |
|
|
|
calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), |
|
GFP_NOFS); |
|
status = -ENOMEM; |
|
if (unlikely(calldata->res.server_owner == NULL)) |
|
goto out_calldata; |
|
|
|
calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), |
|
GFP_NOFS); |
|
if (unlikely(calldata->res.server_scope == NULL)) |
|
goto out_server_owner; |
|
|
|
calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); |
|
if (unlikely(calldata->res.impl_id == NULL)) |
|
goto out_server_scope; |
|
|
|
switch (sp4_how) { |
|
case SP4_NONE: |
|
calldata->args.state_protect.how = SP4_NONE; |
|
break; |
|
|
|
case SP4_MACH_CRED: |
|
calldata->args.state_protect = nfs4_sp4_mach_cred_request; |
|
break; |
|
|
|
default: |
|
/* unsupported! */ |
|
WARN_ON_ONCE(1); |
|
status = -EINVAL; |
|
goto out_impl_id; |
|
} |
|
if (xprt) { |
|
task_setup_data.rpc_xprt = xprt; |
|
task_setup_data.flags |= RPC_TASK_SOFTCONN; |
|
memcpy(calldata->args.verifier.data, clp->cl_confirm.data, |
|
sizeof(calldata->args.verifier.data)); |
|
} |
|
calldata->args.client = clp; |
|
calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | |
|
EXCHGID4_FLAG_BIND_PRINC_STATEID; |
|
#ifdef CONFIG_NFS_V4_1_MIGRATION |
|
calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; |
|
#endif |
|
msg.rpc_argp = &calldata->args; |
|
msg.rpc_resp = &calldata->res; |
|
task_setup_data.callback_data = calldata; |
|
|
|
return rpc_run_task(&task_setup_data); |
|
|
|
out_impl_id: |
|
kfree(calldata->res.impl_id); |
|
out_server_scope: |
|
kfree(calldata->res.server_scope); |
|
out_server_owner: |
|
kfree(calldata->res.server_owner); |
|
out_calldata: |
|
kfree(calldata); |
|
out: |
|
nfs_put_client(clp); |
|
return ERR_PTR(status); |
|
} |
|
|
|
/* |
|
* _nfs4_proc_exchange_id() |
|
* |
|
* Wrapper for EXCHANGE_ID operation. |
|
*/ |
|
static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred, |
|
u32 sp4_how) |
|
{ |
|
struct rpc_task *task; |
|
struct nfs41_exchange_id_args *argp; |
|
struct nfs41_exchange_id_res *resp; |
|
unsigned long now = jiffies; |
|
int status; |
|
|
|
task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); |
|
if (IS_ERR(task)) |
|
return PTR_ERR(task); |
|
|
|
argp = task->tk_msg.rpc_argp; |
|
resp = task->tk_msg.rpc_resp; |
|
status = task->tk_status; |
|
if (status != 0) |
|
goto out; |
|
|
|
status = nfs4_check_cl_exchange_flags(resp->flags, |
|
clp->cl_mvops->minor_version); |
|
if (status != 0) |
|
goto out; |
|
|
|
status = nfs4_sp4_select_mode(clp, &resp->state_protect); |
|
if (status != 0) |
|
goto out; |
|
|
|
do_renew_lease(clp, now); |
|
|
|
clp->cl_clientid = resp->clientid; |
|
clp->cl_exchange_flags = resp->flags; |
|
clp->cl_seqid = resp->seqid; |
|
/* Client ID is not confirmed */ |
|
if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) |
|
clear_bit(NFS4_SESSION_ESTABLISHED, |
|
&clp->cl_session->session_state); |
|
|
|
if (clp->cl_serverscope != NULL && |
|
!nfs41_same_server_scope(clp->cl_serverscope, |
|
resp->server_scope)) { |
|
dprintk("%s: server_scope mismatch detected\n", |
|
__func__); |
|
set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); |
|
} |
|
|
|
swap(clp->cl_serverowner, resp->server_owner); |
|
swap(clp->cl_serverscope, resp->server_scope); |
|
swap(clp->cl_implid, resp->impl_id); |
|
|
|
/* Save the EXCHANGE_ID verifier session trunk tests */ |
|
memcpy(clp->cl_confirm.data, argp->verifier.data, |
|
sizeof(clp->cl_confirm.data)); |
|
out: |
|
trace_nfs4_exchange_id(clp, status); |
|
rpc_put_task(task); |
|
return status; |
|
} |
|
|
|
/* |
|
* nfs4_proc_exchange_id() |
|
* |
|
* Returns zero, a negative errno, or a negative NFS4ERR status code. |
|
* |
|
* Since the clientid has expired, all compounds using sessions |
|
* associated with the stale clientid will be returning |
|
* NFS4ERR_BADSESSION in the sequence operation, and will therefore |
|
* be in some phase of session reset. |
|
* |
|
* Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. |
|
*/ |
|
int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred) |
|
{ |
|
rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; |
|
int status; |
|
|
|
/* try SP4_MACH_CRED if krb5i/p */ |
|
if (authflavor == RPC_AUTH_GSS_KRB5I || |
|
authflavor == RPC_AUTH_GSS_KRB5P) { |
|
status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); |
|
if (!status) |
|
return 0; |
|
} |
|
|
|
/* try SP4_NONE */ |
|
return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); |
|
} |
|
|
|
/** |
|
* nfs4_test_session_trunk |
|
* |
|
* This is an add_xprt_test() test function called from |
|
* rpc_clnt_setup_test_and_add_xprt. |
|
* |
|
* The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt |
|
* and is dereferrenced in nfs4_exchange_id_release |
|
* |
|
* Upon success, add the new transport to the rpc_clnt |
|
* |
|
* @clnt: struct rpc_clnt to get new transport |
|
* @xprt: the rpc_xprt to test |
|
* @data: call data for _nfs4_proc_exchange_id. |
|
*/ |
|
void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, |
|
void *data) |
|
{ |
|
struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data; |
|
struct rpc_task *task; |
|
int status; |
|
|
|
u32 sp4_how; |
|
|
|
dprintk("--> %s try %s\n", __func__, |
|
xprt->address_strings[RPC_DISPLAY_ADDR]); |
|
|
|
sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); |
|
|
|
/* Test connection for session trunking. Async exchange_id call */ |
|
task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); |
|
if (IS_ERR(task)) |
|
return; |
|
|
|
status = task->tk_status; |
|
if (status == 0) |
|
status = nfs4_detect_session_trunking(adata->clp, |
|
task->tk_msg.rpc_resp, xprt); |
|
|
|
if (status == 0) |
|
rpc_clnt_xprt_switch_add_xprt(clnt, xprt); |
|
|
|
rpc_put_task(task); |
|
} |
|
EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); |
|
|
|
static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, |
|
const struct cred *cred) |
|
{ |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], |
|
.rpc_argp = clp, |
|
.rpc_cred = cred, |
|
}; |
|
int status; |
|
|
|
status = rpc_call_sync(clp->cl_rpcclient, &msg, |
|
RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); |
|
trace_nfs4_destroy_clientid(clp, status); |
|
if (status) |
|
dprintk("NFS: Got error %d from the server %s on " |
|
"DESTROY_CLIENTID.", status, clp->cl_hostname); |
|
return status; |
|
} |
|
|
|
static int nfs4_proc_destroy_clientid(struct nfs_client *clp, |
|
const struct cred *cred) |
|
{ |
|
unsigned int loop; |
|
int ret; |
|
|
|
for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { |
|
ret = _nfs4_proc_destroy_clientid(clp, cred); |
|
switch (ret) { |
|
case -NFS4ERR_DELAY: |
|
case -NFS4ERR_CLIENTID_BUSY: |
|
ssleep(1); |
|
break; |
|
default: |
|
return ret; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
int nfs4_destroy_clientid(struct nfs_client *clp) |
|
{ |
|
const struct cred *cred; |
|
int ret = 0; |
|
|
|
if (clp->cl_mvops->minor_version < 1) |
|
goto out; |
|
if (clp->cl_exchange_flags == 0) |
|
goto out; |
|
if (clp->cl_preserve_clid) |
|
goto out; |
|
cred = nfs4_get_clid_cred(clp); |
|
ret = nfs4_proc_destroy_clientid(clp, cred); |
|
put_cred(cred); |
|
switch (ret) { |
|
case 0: |
|
case -NFS4ERR_STALE_CLIENTID: |
|
clp->cl_exchange_flags = 0; |
|
} |
|
out: |
|
return ret; |
|
} |
|
|
|
#endif /* CONFIG_NFS_V4_1 */ |
|
|
|
struct nfs4_get_lease_time_data { |
|
struct nfs4_get_lease_time_args *args; |
|
struct nfs4_get_lease_time_res *res; |
|
struct nfs_client *clp; |
|
}; |
|
|
|
static void nfs4_get_lease_time_prepare(struct rpc_task *task, |
|
void *calldata) |
|
{ |
|
struct nfs4_get_lease_time_data *data = |
|
(struct nfs4_get_lease_time_data *)calldata; |
|
|
|
dprintk("--> %s\n", __func__); |
|
/* just setup sequence, do not trigger session recovery |
|
since we're invoked within one */ |
|
nfs4_setup_sequence(data->clp, |
|
&data->args->la_seq_args, |
|
&data->res->lr_seq_res, |
|
task); |
|
dprintk("<-- %s\n", __func__); |
|
} |
|
|
|
/* |
|
* Called from nfs4_state_manager thread for session setup, so don't recover |
|
* from sequence operation or clientid errors. |
|
*/ |
|
static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_get_lease_time_data *data = |
|
(struct nfs4_get_lease_time_data *)calldata; |
|
|
|
dprintk("--> %s\n", __func__); |
|
if (!nfs4_sequence_done(task, &data->res->lr_seq_res)) |
|
return; |
|
switch (task->tk_status) { |
|
case -NFS4ERR_DELAY: |
|
case -NFS4ERR_GRACE: |
|
dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); |
|
rpc_delay(task, NFS4_POLL_RETRY_MIN); |
|
task->tk_status = 0; |
|
fallthrough; |
|
case -NFS4ERR_RETRY_UNCACHED_REP: |
|
rpc_restart_call_prepare(task); |
|
return; |
|
} |
|
dprintk("<-- %s\n", __func__); |
|
} |
|
|
|
static const struct rpc_call_ops nfs4_get_lease_time_ops = { |
|
.rpc_call_prepare = nfs4_get_lease_time_prepare, |
|
.rpc_call_done = nfs4_get_lease_time_done, |
|
}; |
|
|
|
int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) |
|
{ |
|
struct nfs4_get_lease_time_args args; |
|
struct nfs4_get_lease_time_res res = { |
|
.lr_fsinfo = fsinfo, |
|
}; |
|
struct nfs4_get_lease_time_data data = { |
|
.args = &args, |
|
.res = &res, |
|
.clp = clp, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
}; |
|
struct rpc_task_setup task_setup = { |
|
.rpc_client = clp->cl_rpcclient, |
|
.rpc_message = &msg, |
|
.callback_ops = &nfs4_get_lease_time_ops, |
|
.callback_data = &data, |
|
.flags = RPC_TASK_TIMEOUT, |
|
}; |
|
|
|
nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); |
|
return nfs4_call_sync_custom(&task_setup); |
|
} |
|
|
|
#ifdef CONFIG_NFS_V4_1 |
|
|
|
/* |
|
* Initialize the values to be used by the client in CREATE_SESSION |
|
* If nfs4_init_session set the fore channel request and response sizes, |
|
* use them. |
|
* |
|
* Set the back channel max_resp_sz_cached to zero to force the client to |
|
* always set csa_cachethis to FALSE because the current implementation |
|
* of the back channel DRC only supports caching the CB_SEQUENCE operation. |
|
*/ |
|
static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, |
|
struct rpc_clnt *clnt) |
|
{ |
|
unsigned int max_rqst_sz, max_resp_sz; |
|
unsigned int max_bc_payload = rpc_max_bc_payload(clnt); |
|
unsigned int max_bc_slots = rpc_num_bc_slots(clnt); |
|
|
|
max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; |
|
max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; |
|
|
|
/* Fore channel attributes */ |
|
args->fc_attrs.max_rqst_sz = max_rqst_sz; |
|
args->fc_attrs.max_resp_sz = max_resp_sz; |
|
args->fc_attrs.max_ops = NFS4_MAX_OPS; |
|
args->fc_attrs.max_reqs = max_session_slots; |
|
|
|
dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " |
|
"max_ops=%u max_reqs=%u\n", |
|
__func__, |
|
args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, |
|
args->fc_attrs.max_ops, args->fc_attrs.max_reqs); |
|
|
|
/* Back channel attributes */ |
|
args->bc_attrs.max_rqst_sz = max_bc_payload; |
|
args->bc_attrs.max_resp_sz = max_bc_payload; |
|
args->bc_attrs.max_resp_sz_cached = 0; |
|
args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; |
|
args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); |
|
if (args->bc_attrs.max_reqs > max_bc_slots) |
|
args->bc_attrs.max_reqs = max_bc_slots; |
|
|
|
dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " |
|
"max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", |
|
__func__, |
|
args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, |
|
args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, |
|
args->bc_attrs.max_reqs); |
|
} |
|
|
|
static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, |
|
struct nfs41_create_session_res *res) |
|
{ |
|
struct nfs4_channel_attrs *sent = &args->fc_attrs; |
|
struct nfs4_channel_attrs *rcvd = &res->fc_attrs; |
|
|
|
if (rcvd->max_resp_sz > sent->max_resp_sz) |
|
return -EINVAL; |
|
/* |
|
* Our requested max_ops is the minimum we need; we're not |
|
* prepared to break up compounds into smaller pieces than that. |
|
* So, no point even trying to continue if the server won't |
|
* cooperate: |
|
*/ |
|
if (rcvd->max_ops < sent->max_ops) |
|
return -EINVAL; |
|
if (rcvd->max_reqs == 0) |
|
return -EINVAL; |
|
if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) |
|
rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; |
|
return 0; |
|
} |
|
|
|
static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, |
|
struct nfs41_create_session_res *res) |
|
{ |
|
struct nfs4_channel_attrs *sent = &args->bc_attrs; |
|
struct nfs4_channel_attrs *rcvd = &res->bc_attrs; |
|
|
|
if (!(res->flags & SESSION4_BACK_CHAN)) |
|
goto out; |
|
if (rcvd->max_rqst_sz > sent->max_rqst_sz) |
|
return -EINVAL; |
|
if (rcvd->max_resp_sz < sent->max_resp_sz) |
|
return -EINVAL; |
|
if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) |
|
return -EINVAL; |
|
if (rcvd->max_ops > sent->max_ops) |
|
return -EINVAL; |
|
if (rcvd->max_reqs > sent->max_reqs) |
|
return -EINVAL; |
|
out: |
|
return 0; |
|
} |
|
|
|
static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, |
|
struct nfs41_create_session_res *res) |
|
{ |
|
int ret; |
|
|
|
ret = nfs4_verify_fore_channel_attrs(args, res); |
|
if (ret) |
|
return ret; |
|
return nfs4_verify_back_channel_attrs(args, res); |
|
} |
|
|
|
static void nfs4_update_session(struct nfs4_session *session, |
|
struct nfs41_create_session_res *res) |
|
{ |
|
nfs4_copy_sessionid(&session->sess_id, &res->sessionid); |
|
/* Mark client id and session as being confirmed */ |
|
session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; |
|
set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); |
|
session->flags = res->flags; |
|
memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); |
|
if (res->flags & SESSION4_BACK_CHAN) |
|
memcpy(&session->bc_attrs, &res->bc_attrs, |
|
sizeof(session->bc_attrs)); |
|
} |
|
|
|
static int _nfs4_proc_create_session(struct nfs_client *clp, |
|
const struct cred *cred) |
|
{ |
|
struct nfs4_session *session = clp->cl_session; |
|
struct nfs41_create_session_args args = { |
|
.client = clp, |
|
.clientid = clp->cl_clientid, |
|
.seqid = clp->cl_seqid, |
|
.cb_program = NFS4_CALLBACK, |
|
}; |
|
struct nfs41_create_session_res res; |
|
|
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
.rpc_cred = cred, |
|
}; |
|
int status; |
|
|
|
nfs4_init_channel_attrs(&args, clp->cl_rpcclient); |
|
args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); |
|
|
|
status = rpc_call_sync(session->clp->cl_rpcclient, &msg, |
|
RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); |
|
trace_nfs4_create_session(clp, status); |
|
|
|
switch (status) { |
|
case -NFS4ERR_STALE_CLIENTID: |
|
case -NFS4ERR_DELAY: |
|
case -ETIMEDOUT: |
|
case -EACCES: |
|
case -EAGAIN: |
|
goto out; |
|
} |
|
|
|
clp->cl_seqid++; |
|
if (!status) { |
|
/* Verify the session's negotiated channel_attrs values */ |
|
status = nfs4_verify_channel_attrs(&args, &res); |
|
/* Increment the clientid slot sequence id */ |
|
if (status) |
|
goto out; |
|
nfs4_update_session(session, &res); |
|
} |
|
out: |
|
return status; |
|
} |
|
|
|
/* |
|
* Issues a CREATE_SESSION operation to the server. |
|
* It is the responsibility of the caller to verify the session is |
|
* expired before calling this routine. |
|
*/ |
|
int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred) |
|
{ |
|
int status; |
|
unsigned *ptr; |
|
struct nfs4_session *session = clp->cl_session; |
|
|
|
dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); |
|
|
|
status = _nfs4_proc_create_session(clp, cred); |
|
if (status) |
|
goto out; |
|
|
|
/* Init or reset the session slot tables */ |
|
status = nfs4_setup_session_slot_tables(session); |
|
dprintk("slot table setup returned %d\n", status); |
|
if (status) |
|
goto out; |
|
|
|
ptr = (unsigned *)&session->sess_id.data[0]; |
|
dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, |
|
clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); |
|
out: |
|
dprintk("<-- %s\n", __func__); |
|
return status; |
|
} |
|
|
|
/* |
|
* Issue the over-the-wire RPC DESTROY_SESSION. |
|
* The caller must serialize access to this routine. |
|
*/ |
|
int nfs4_proc_destroy_session(struct nfs4_session *session, |
|
const struct cred *cred) |
|
{ |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], |
|
.rpc_argp = session, |
|
.rpc_cred = cred, |
|
}; |
|
int status = 0; |
|
|
|
dprintk("--> nfs4_proc_destroy_session\n"); |
|
|
|
/* session is still being setup */ |
|
if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) |
|
return 0; |
|
|
|
status = rpc_call_sync(session->clp->cl_rpcclient, &msg, |
|
RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); |
|
trace_nfs4_destroy_session(session->clp, status); |
|
|
|
if (status) |
|
dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " |
|
"Session has been destroyed regardless...\n", status); |
|
|
|
dprintk("<-- nfs4_proc_destroy_session\n"); |
|
return status; |
|
} |
|
|
|
/* |
|
* Renew the cl_session lease. |
|
*/ |
|
struct nfs4_sequence_data { |
|
struct nfs_client *clp; |
|
struct nfs4_sequence_args args; |
|
struct nfs4_sequence_res res; |
|
}; |
|
|
|
static void nfs41_sequence_release(void *data) |
|
{ |
|
struct nfs4_sequence_data *calldata = data; |
|
struct nfs_client *clp = calldata->clp; |
|
|
|
if (refcount_read(&clp->cl_count) > 1) |
|
nfs4_schedule_state_renewal(clp); |
|
nfs_put_client(clp); |
|
kfree(calldata); |
|
} |
|
|
|
static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) |
|
{ |
|
switch(task->tk_status) { |
|
case -NFS4ERR_DELAY: |
|
rpc_delay(task, NFS4_POLL_RETRY_MAX); |
|
return -EAGAIN; |
|
default: |
|
nfs4_schedule_lease_recovery(clp); |
|
} |
|
return 0; |
|
} |
|
|
|
static void nfs41_sequence_call_done(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs4_sequence_data *calldata = data; |
|
struct nfs_client *clp = calldata->clp; |
|
|
|
if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) |
|
return; |
|
|
|
trace_nfs4_sequence(clp, task->tk_status); |
|
if (task->tk_status < 0) { |
|
dprintk("%s ERROR %d\n", __func__, task->tk_status); |
|
if (refcount_read(&clp->cl_count) == 1) |
|
goto out; |
|
|
|
if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { |
|
rpc_restart_call_prepare(task); |
|
return; |
|
} |
|
} |
|
dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); |
|
out: |
|
dprintk("<-- %s\n", __func__); |
|
} |
|
|
|
static void nfs41_sequence_prepare(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs4_sequence_data *calldata = data; |
|
struct nfs_client *clp = calldata->clp; |
|
struct nfs4_sequence_args *args; |
|
struct nfs4_sequence_res *res; |
|
|
|
args = task->tk_msg.rpc_argp; |
|
res = task->tk_msg.rpc_resp; |
|
|
|
nfs4_setup_sequence(clp, args, res, task); |
|
} |
|
|
|
static const struct rpc_call_ops nfs41_sequence_ops = { |
|
.rpc_call_done = nfs41_sequence_call_done, |
|
.rpc_call_prepare = nfs41_sequence_prepare, |
|
.rpc_release = nfs41_sequence_release, |
|
}; |
|
|
|
static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, |
|
const struct cred *cred, |
|
struct nfs4_slot *slot, |
|
bool is_privileged) |
|
{ |
|
struct nfs4_sequence_data *calldata; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], |
|
.rpc_cred = cred, |
|
}; |
|
struct rpc_task_setup task_setup_data = { |
|
.rpc_client = clp->cl_rpcclient, |
|
.rpc_message = &msg, |
|
.callback_ops = &nfs41_sequence_ops, |
|
.flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, |
|
}; |
|
struct rpc_task *ret; |
|
|
|
ret = ERR_PTR(-EIO); |
|
if (!refcount_inc_not_zero(&clp->cl_count)) |
|
goto out_err; |
|
|
|
ret = ERR_PTR(-ENOMEM); |
|
calldata = kzalloc(sizeof(*calldata), GFP_NOFS); |
|
if (calldata == NULL) |
|
goto out_put_clp; |
|
nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); |
|
nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); |
|
msg.rpc_argp = &calldata->args; |
|
msg.rpc_resp = &calldata->res; |
|
calldata->clp = clp; |
|
task_setup_data.callback_data = calldata; |
|
|
|
ret = rpc_run_task(&task_setup_data); |
|
if (IS_ERR(ret)) |
|
goto out_err; |
|
return ret; |
|
out_put_clp: |
|
nfs_put_client(clp); |
|
out_err: |
|
nfs41_release_slot(slot); |
|
return ret; |
|
} |
|
|
|
static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) |
|
{ |
|
struct rpc_task *task; |
|
int ret = 0; |
|
|
|
if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) |
|
return -EAGAIN; |
|
task = _nfs41_proc_sequence(clp, cred, NULL, false); |
|
if (IS_ERR(task)) |
|
ret = PTR_ERR(task); |
|
else |
|
rpc_put_task_async(task); |
|
dprintk("<-- %s status=%d\n", __func__, ret); |
|
return ret; |
|
} |
|
|
|
static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred) |
|
{ |
|
struct rpc_task *task; |
|
int ret; |
|
|
|
task = _nfs41_proc_sequence(clp, cred, NULL, true); |
|
if (IS_ERR(task)) { |
|
ret = PTR_ERR(task); |
|
goto out; |
|
} |
|
ret = rpc_wait_for_completion_task(task); |
|
if (!ret) |
|
ret = task->tk_status; |
|
rpc_put_task(task); |
|
out: |
|
dprintk("<-- %s status=%d\n", __func__, ret); |
|
return ret; |
|
} |
|
|
|
struct nfs4_reclaim_complete_data { |
|
struct nfs_client *clp; |
|
struct nfs41_reclaim_complete_args arg; |
|
struct nfs41_reclaim_complete_res res; |
|
}; |
|
|
|
static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs4_reclaim_complete_data *calldata = data; |
|
|
|
nfs4_setup_sequence(calldata->clp, |
|
&calldata->arg.seq_args, |
|
&calldata->res.seq_res, |
|
task); |
|
} |
|
|
|
static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) |
|
{ |
|
switch(task->tk_status) { |
|
case 0: |
|
wake_up_all(&clp->cl_lock_waitq); |
|
fallthrough; |
|
case -NFS4ERR_COMPLETE_ALREADY: |
|
case -NFS4ERR_WRONG_CRED: /* What to do here? */ |
|
break; |
|
case -NFS4ERR_DELAY: |
|
rpc_delay(task, NFS4_POLL_RETRY_MAX); |
|
fallthrough; |
|
case -NFS4ERR_RETRY_UNCACHED_REP: |
|
return -EAGAIN; |
|
case -NFS4ERR_BADSESSION: |
|
case -NFS4ERR_DEADSESSION: |
|
case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
|
break; |
|
default: |
|
nfs4_schedule_lease_recovery(clp); |
|
} |
|
return 0; |
|
} |
|
|
|
static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs4_reclaim_complete_data *calldata = data; |
|
struct nfs_client *clp = calldata->clp; |
|
struct nfs4_sequence_res *res = &calldata->res.seq_res; |
|
|
|
dprintk("--> %s\n", __func__); |
|
if (!nfs41_sequence_done(task, res)) |
|
return; |
|
|
|
trace_nfs4_reclaim_complete(clp, task->tk_status); |
|
if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { |
|
rpc_restart_call_prepare(task); |
|
return; |
|
} |
|
dprintk("<-- %s\n", __func__); |
|
} |
|
|
|
static void nfs4_free_reclaim_complete_data(void *data) |
|
{ |
|
struct nfs4_reclaim_complete_data *calldata = data; |
|
|
|
kfree(calldata); |
|
} |
|
|
|
static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { |
|
.rpc_call_prepare = nfs4_reclaim_complete_prepare, |
|
.rpc_call_done = nfs4_reclaim_complete_done, |
|
.rpc_release = nfs4_free_reclaim_complete_data, |
|
}; |
|
|
|
/* |
|
* Issue a global reclaim complete. |
|
*/ |
|
static int nfs41_proc_reclaim_complete(struct nfs_client *clp, |
|
const struct cred *cred) |
|
{ |
|
struct nfs4_reclaim_complete_data *calldata; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], |
|
.rpc_cred = cred, |
|
}; |
|
struct rpc_task_setup task_setup_data = { |
|
.rpc_client = clp->cl_rpcclient, |
|
.rpc_message = &msg, |
|
.callback_ops = &nfs4_reclaim_complete_call_ops, |
|
.flags = RPC_TASK_NO_ROUND_ROBIN, |
|
}; |
|
int status = -ENOMEM; |
|
|
|
dprintk("--> %s\n", __func__); |
|
calldata = kzalloc(sizeof(*calldata), GFP_NOFS); |
|
if (calldata == NULL) |
|
goto out; |
|
calldata->clp = clp; |
|
calldata->arg.one_fs = 0; |
|
|
|
nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); |
|
msg.rpc_argp = &calldata->arg; |
|
msg.rpc_resp = &calldata->res; |
|
task_setup_data.callback_data = calldata; |
|
status = nfs4_call_sync_custom(&task_setup_data); |
|
out: |
|
dprintk("<-- %s status=%d\n", __func__, status); |
|
return status; |
|
} |
|
|
|
static void |
|
nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_layoutget *lgp = calldata; |
|
struct nfs_server *server = NFS_SERVER(lgp->args.inode); |
|
|
|
dprintk("--> %s\n", __func__); |
|
nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, |
|
&lgp->res.seq_res, task); |
|
dprintk("<-- %s\n", __func__); |
|
} |
|
|
|
static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_layoutget *lgp = calldata; |
|
|
|
dprintk("--> %s\n", __func__); |
|
nfs41_sequence_process(task, &lgp->res.seq_res); |
|
dprintk("<-- %s\n", __func__); |
|
} |
|
|
|
static int |
|
nfs4_layoutget_handle_exception(struct rpc_task *task, |
|
struct nfs4_layoutget *lgp, struct nfs4_exception *exception) |
|
{ |
|
struct inode *inode = lgp->args.inode; |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
struct pnfs_layout_hdr *lo; |
|
int nfs4err = task->tk_status; |
|
int err, status = 0; |
|
LIST_HEAD(head); |
|
|
|
dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); |
|
|
|
nfs4_sequence_free_slot(&lgp->res.seq_res); |
|
|
|
switch (nfs4err) { |
|
case 0: |
|
goto out; |
|
|
|
/* |
|
* NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs |
|
* on the file. set tk_status to -ENODATA to tell upper layer to |
|
* retry go inband. |
|
*/ |
|
case -NFS4ERR_LAYOUTUNAVAILABLE: |
|
status = -ENODATA; |
|
goto out; |
|
/* |
|
* NFS4ERR_BADLAYOUT means the MDS cannot return a layout of |
|
* length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). |
|
*/ |
|
case -NFS4ERR_BADLAYOUT: |
|
status = -EOVERFLOW; |
|
goto out; |
|
/* |
|
* NFS4ERR_LAYOUTTRYLATER is a conflict with another client |
|
* (or clients) writing to the same RAID stripe except when |
|
* the minlength argument is 0 (see RFC5661 section 18.43.3). |
|
* |
|
* Treat it like we would RECALLCONFLICT -- we retry for a little |
|
* while, and then eventually give up. |
|
*/ |
|
case -NFS4ERR_LAYOUTTRYLATER: |
|
if (lgp->args.minlength == 0) { |
|
status = -EOVERFLOW; |
|
goto out; |
|
} |
|
status = -EBUSY; |
|
break; |
|
case -NFS4ERR_RECALLCONFLICT: |
|
status = -ERECALLCONFLICT; |
|
break; |
|
case -NFS4ERR_DELEG_REVOKED: |
|
case -NFS4ERR_ADMIN_REVOKED: |
|
case -NFS4ERR_EXPIRED: |
|
case -NFS4ERR_BAD_STATEID: |
|
exception->timeout = 0; |
|
spin_lock(&inode->i_lock); |
|
lo = NFS_I(inode)->layout; |
|
/* If the open stateid was bad, then recover it. */ |
|
if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || |
|
!nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { |
|
spin_unlock(&inode->i_lock); |
|
exception->state = lgp->args.ctx->state; |
|
exception->stateid = &lgp->args.stateid; |
|
break; |
|
} |
|
|
|
/* |
|
* Mark the bad layout state as invalid, then retry |
|
*/ |
|
pnfs_mark_layout_stateid_invalid(lo, &head); |
|
spin_unlock(&inode->i_lock); |
|
nfs_commit_inode(inode, 0); |
|
pnfs_free_lseg_list(&head); |
|
status = -EAGAIN; |
|
goto out; |
|
} |
|
|
|
err = nfs4_handle_exception(server, nfs4err, exception); |
|
if (!status) { |
|
if (exception->retry) |
|
status = -EAGAIN; |
|
else |
|
status = err; |
|
} |
|
out: |
|
dprintk("<-- %s\n", __func__); |
|
return status; |
|
} |
|
|
|
size_t max_response_pages(struct nfs_server *server) |
|
{ |
|
u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; |
|
return nfs_page_array_len(0, max_resp_sz); |
|
} |
|
|
|
static void nfs4_layoutget_release(void *calldata) |
|
{ |
|
struct nfs4_layoutget *lgp = calldata; |
|
|
|
dprintk("--> %s\n", __func__); |
|
nfs4_sequence_free_slot(&lgp->res.seq_res); |
|
pnfs_layoutget_free(lgp); |
|
dprintk("<-- %s\n", __func__); |
|
} |
|
|
|
static const struct rpc_call_ops nfs4_layoutget_call_ops = { |
|
.rpc_call_prepare = nfs4_layoutget_prepare, |
|
.rpc_call_done = nfs4_layoutget_done, |
|
.rpc_release = nfs4_layoutget_release, |
|
}; |
|
|
|
struct pnfs_layout_segment * |
|
nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout) |
|
{ |
|
struct inode *inode = lgp->args.inode; |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
struct rpc_task *task; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], |
|
.rpc_argp = &lgp->args, |
|
.rpc_resp = &lgp->res, |
|
.rpc_cred = lgp->cred, |
|
}; |
|
struct rpc_task_setup task_setup_data = { |
|
.rpc_client = server->client, |
|
.rpc_message = &msg, |
|
.callback_ops = &nfs4_layoutget_call_ops, |
|
.callback_data = lgp, |
|
.flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, |
|
}; |
|
struct pnfs_layout_segment *lseg = NULL; |
|
struct nfs4_exception exception = { |
|
.inode = inode, |
|
.timeout = *timeout, |
|
}; |
|
int status = 0; |
|
|
|
dprintk("--> %s\n", __func__); |
|
|
|
/* nfs4_layoutget_release calls pnfs_put_layout_hdr */ |
|
pnfs_get_layout_hdr(NFS_I(inode)->layout); |
|
|
|
nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); |
|
|
|
task = rpc_run_task(&task_setup_data); |
|
|
|
status = rpc_wait_for_completion_task(task); |
|
if (status != 0) |
|
goto out; |
|
|
|
if (task->tk_status < 0) { |
|
status = nfs4_layoutget_handle_exception(task, lgp, &exception); |
|
*timeout = exception.timeout; |
|
} else if (lgp->res.layoutp->len == 0) { |
|
status = -EAGAIN; |
|
*timeout = nfs4_update_delay(&exception.timeout); |
|
} else |
|
lseg = pnfs_layout_process(lgp); |
|
out: |
|
trace_nfs4_layoutget(lgp->args.ctx, |
|
&lgp->args.range, |
|
&lgp->res.range, |
|
&lgp->res.stateid, |
|
status); |
|
|
|
rpc_put_task(task); |
|
dprintk("<-- %s status=%d\n", __func__, status); |
|
if (status) |
|
return ERR_PTR(status); |
|
return lseg; |
|
} |
|
|
|
static void |
|
nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_layoutreturn *lrp = calldata; |
|
|
|
dprintk("--> %s\n", __func__); |
|
nfs4_setup_sequence(lrp->clp, |
|
&lrp->args.seq_args, |
|
&lrp->res.seq_res, |
|
task); |
|
if (!pnfs_layout_is_valid(lrp->args.layout)) |
|
rpc_exit(task, 0); |
|
} |
|
|
|
static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_layoutreturn *lrp = calldata; |
|
struct nfs_server *server; |
|
|
|
dprintk("--> %s\n", __func__); |
|
|
|
if (!nfs41_sequence_process(task, &lrp->res.seq_res)) |
|
return; |
|
|
|
/* |
|
* Was there an RPC level error? Assume the call succeeded, |
|
* and that we need to release the layout |
|
*/ |
|
if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) { |
|
lrp->res.lrs_present = 0; |
|
return; |
|
} |
|
|
|
server = NFS_SERVER(lrp->args.inode); |
|
switch (task->tk_status) { |
|
case -NFS4ERR_OLD_STATEID: |
|
if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid, |
|
&lrp->args.range, |
|
lrp->args.inode)) |
|
goto out_restart; |
|
fallthrough; |
|
default: |
|
task->tk_status = 0; |
|
fallthrough; |
|
case 0: |
|
break; |
|
case -NFS4ERR_DELAY: |
|
if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) |
|
break; |
|
goto out_restart; |
|
} |
|
dprintk("<-- %s\n", __func__); |
|
return; |
|
out_restart: |
|
task->tk_status = 0; |
|
nfs4_sequence_free_slot(&lrp->res.seq_res); |
|
rpc_restart_call_prepare(task); |
|
} |
|
|
|
static void nfs4_layoutreturn_release(void *calldata) |
|
{ |
|
struct nfs4_layoutreturn *lrp = calldata; |
|
struct pnfs_layout_hdr *lo = lrp->args.layout; |
|
|
|
dprintk("--> %s\n", __func__); |
|
pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range, |
|
lrp->res.lrs_present ? &lrp->res.stateid : NULL); |
|
nfs4_sequence_free_slot(&lrp->res.seq_res); |
|
if (lrp->ld_private.ops && lrp->ld_private.ops->free) |
|
lrp->ld_private.ops->free(&lrp->ld_private); |
|
pnfs_put_layout_hdr(lrp->args.layout); |
|
nfs_iput_and_deactive(lrp->inode); |
|
put_cred(lrp->cred); |
|
kfree(calldata); |
|
dprintk("<-- %s\n", __func__); |
|
} |
|
|
|
static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { |
|
.rpc_call_prepare = nfs4_layoutreturn_prepare, |
|
.rpc_call_done = nfs4_layoutreturn_done, |
|
.rpc_release = nfs4_layoutreturn_release, |
|
}; |
|
|
|
int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) |
|
{ |
|
struct rpc_task *task; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], |
|
.rpc_argp = &lrp->args, |
|
.rpc_resp = &lrp->res, |
|
.rpc_cred = lrp->cred, |
|
}; |
|
struct rpc_task_setup task_setup_data = { |
|
.rpc_client = NFS_SERVER(lrp->args.inode)->client, |
|
.rpc_message = &msg, |
|
.callback_ops = &nfs4_layoutreturn_call_ops, |
|
.callback_data = lrp, |
|
}; |
|
int status = 0; |
|
|
|
nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, |
|
NFS_SP4_MACH_CRED_PNFS_CLEANUP, |
|
&task_setup_data.rpc_client, &msg); |
|
|
|
dprintk("--> %s\n", __func__); |
|
lrp->inode = nfs_igrab_and_active(lrp->args.inode); |
|
if (!sync) { |
|
if (!lrp->inode) { |
|
nfs4_layoutreturn_release(lrp); |
|
return -EAGAIN; |
|
} |
|
task_setup_data.flags |= RPC_TASK_ASYNC; |
|
} |
|
if (!lrp->inode) |
|
nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, |
|
1); |
|
else |
|
nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, |
|
0); |
|
task = rpc_run_task(&task_setup_data); |
|
if (IS_ERR(task)) |
|
return PTR_ERR(task); |
|
if (sync) |
|
status = task->tk_status; |
|
trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); |
|
dprintk("<-- %s status=%d\n", __func__, status); |
|
rpc_put_task(task); |
|
return status; |
|
} |
|
|
|
static int |
|
_nfs4_proc_getdeviceinfo(struct nfs_server *server, |
|
struct pnfs_device *pdev, |
|
const struct cred *cred) |
|
{ |
|
struct nfs4_getdeviceinfo_args args = { |
|
.pdev = pdev, |
|
.notify_types = NOTIFY_DEVICEID4_CHANGE | |
|
NOTIFY_DEVICEID4_DELETE, |
|
}; |
|
struct nfs4_getdeviceinfo_res res = { |
|
.pdev = pdev, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
.rpc_cred = cred, |
|
}; |
|
int status; |
|
|
|
dprintk("--> %s\n", __func__); |
|
status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); |
|
if (res.notification & ~args.notify_types) |
|
dprintk("%s: unsupported notification\n", __func__); |
|
if (res.notification != args.notify_types) |
|
pdev->nocache = 1; |
|
|
|
dprintk("<-- %s status=%d\n", __func__, status); |
|
|
|
return status; |
|
} |
|
|
|
int nfs4_proc_getdeviceinfo(struct nfs_server *server, |
|
struct pnfs_device *pdev, |
|
const struct cred *cred) |
|
{ |
|
struct nfs4_exception exception = { }; |
|
int err; |
|
|
|
do { |
|
err = nfs4_handle_exception(server, |
|
_nfs4_proc_getdeviceinfo(server, pdev, cred), |
|
&exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); |
|
|
|
static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_layoutcommit_data *data = calldata; |
|
struct nfs_server *server = NFS_SERVER(data->args.inode); |
|
|
|
nfs4_setup_sequence(server->nfs_client, |
|
&data->args.seq_args, |
|
&data->res.seq_res, |
|
task); |
|
} |
|
|
|
static void |
|
nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs4_layoutcommit_data *data = calldata; |
|
struct nfs_server *server = NFS_SERVER(data->args.inode); |
|
|
|
if (!nfs41_sequence_done(task, &data->res.seq_res)) |
|
return; |
|
|
|
switch (task->tk_status) { /* Just ignore these failures */ |
|
case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ |
|
case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ |
|
case -NFS4ERR_BADLAYOUT: /* no layout */ |
|
case -NFS4ERR_GRACE: /* loca_recalim always false */ |
|
task->tk_status = 0; |
|
case 0: |
|
break; |
|
default: |
|
if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { |
|
rpc_restart_call_prepare(task); |
|
return; |
|
} |
|
} |
|
} |
|
|
|
static void nfs4_layoutcommit_release(void *calldata) |
|
{ |
|
struct nfs4_layoutcommit_data *data = calldata; |
|
|
|
pnfs_cleanup_layoutcommit(data); |
|
nfs_post_op_update_inode_force_wcc(data->args.inode, |
|
data->res.fattr); |
|
put_cred(data->cred); |
|
nfs_iput_and_deactive(data->inode); |
|
kfree(data); |
|
} |
|
|
|
static const struct rpc_call_ops nfs4_layoutcommit_ops = { |
|
.rpc_call_prepare = nfs4_layoutcommit_prepare, |
|
.rpc_call_done = nfs4_layoutcommit_done, |
|
.rpc_release = nfs4_layoutcommit_release, |
|
}; |
|
|
|
int |
|
nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) |
|
{ |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], |
|
.rpc_argp = &data->args, |
|
.rpc_resp = &data->res, |
|
.rpc_cred = data->cred, |
|
}; |
|
struct rpc_task_setup task_setup_data = { |
|
.task = &data->task, |
|
.rpc_client = NFS_CLIENT(data->args.inode), |
|
.rpc_message = &msg, |
|
.callback_ops = &nfs4_layoutcommit_ops, |
|
.callback_data = data, |
|
}; |
|
struct rpc_task *task; |
|
int status = 0; |
|
|
|
dprintk("NFS: initiating layoutcommit call. sync %d " |
|
"lbw: %llu inode %lu\n", sync, |
|
data->args.lastbytewritten, |
|
data->args.inode->i_ino); |
|
|
|
if (!sync) { |
|
data->inode = nfs_igrab_and_active(data->args.inode); |
|
if (data->inode == NULL) { |
|
nfs4_layoutcommit_release(data); |
|
return -EAGAIN; |
|
} |
|
task_setup_data.flags = RPC_TASK_ASYNC; |
|
} |
|
nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); |
|
task = rpc_run_task(&task_setup_data); |
|
if (IS_ERR(task)) |
|
return PTR_ERR(task); |
|
if (sync) |
|
status = task->tk_status; |
|
trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); |
|
dprintk("%s: status %d\n", __func__, status); |
|
rpc_put_task(task); |
|
return status; |
|
} |
|
|
|
/* |
|
* Use the state managment nfs_client cl_rpcclient, which uses krb5i (if |
|
* possible) as per RFC3530bis and RFC5661 Security Considerations sections |
|
*/ |
|
static int |
|
_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, |
|
struct nfs_fsinfo *info, |
|
struct nfs4_secinfo_flavors *flavors, bool use_integrity) |
|
{ |
|
struct nfs41_secinfo_no_name_args args = { |
|
.style = SECINFO_STYLE_CURRENT_FH, |
|
}; |
|
struct nfs4_secinfo_res res = { |
|
.flavors = flavors, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
}; |
|
struct nfs4_call_sync_data data = { |
|
.seq_server = server, |
|
.seq_args = &args.seq_args, |
|
.seq_res = &res.seq_res, |
|
}; |
|
struct rpc_task_setup task_setup = { |
|
.rpc_client = server->client, |
|
.rpc_message = &msg, |
|
.callback_ops = server->nfs_client->cl_mvops->call_sync_ops, |
|
.callback_data = &data, |
|
.flags = RPC_TASK_NO_ROUND_ROBIN, |
|
}; |
|
const struct cred *cred = NULL; |
|
int status; |
|
|
|
if (use_integrity) { |
|
task_setup.rpc_client = server->nfs_client->cl_rpcclient; |
|
|
|
cred = nfs4_get_clid_cred(server->nfs_client); |
|
msg.rpc_cred = cred; |
|
} |
|
|
|
dprintk("--> %s\n", __func__); |
|
nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); |
|
status = nfs4_call_sync_custom(&task_setup); |
|
dprintk("<-- %s status=%d\n", __func__, status); |
|
|
|
put_cred(cred); |
|
|
|
return status; |
|
} |
|
|
|
static int |
|
nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, |
|
struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int err; |
|
do { |
|
/* first try using integrity protection */ |
|
err = -NFS4ERR_WRONGSEC; |
|
|
|
/* try to use integrity protection with machine cred */ |
|
if (_nfs4_is_integrity_protected(server->nfs_client)) |
|
err = _nfs41_proc_secinfo_no_name(server, fhandle, info, |
|
flavors, true); |
|
|
|
/* |
|
* if unable to use integrity protection, or SECINFO with |
|
* integrity protection returns NFS4ERR_WRONGSEC (which is |
|
* disallowed by spec, but exists in deployed servers) use |
|
* the current filesystem's rpc_client and the user cred. |
|
*/ |
|
if (err == -NFS4ERR_WRONGSEC) |
|
err = _nfs41_proc_secinfo_no_name(server, fhandle, info, |
|
flavors, false); |
|
|
|
switch (err) { |
|
case 0: |
|
case -NFS4ERR_WRONGSEC: |
|
case -ENOTSUPP: |
|
goto out; |
|
default: |
|
err = nfs4_handle_exception(server, err, &exception); |
|
} |
|
} while (exception.retry); |
|
out: |
|
return err; |
|
} |
|
|
|
static int |
|
nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, |
|
struct nfs_fsinfo *info) |
|
{ |
|
int err; |
|
struct page *page; |
|
rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; |
|
struct nfs4_secinfo_flavors *flavors; |
|
struct nfs4_secinfo4 *secinfo; |
|
int i; |
|
|
|
page = alloc_page(GFP_KERNEL); |
|
if (!page) { |
|
err = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
flavors = page_address(page); |
|
err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); |
|
|
|
/* |
|
* Fall back on "guess and check" method if |
|
* the server doesn't support SECINFO_NO_NAME |
|
*/ |
|
if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { |
|
err = nfs4_find_root_sec(server, fhandle, info); |
|
goto out_freepage; |
|
} |
|
if (err) |
|
goto out_freepage; |
|
|
|
for (i = 0; i < flavors->num_flavors; i++) { |
|
secinfo = &flavors->flavors[i]; |
|
|
|
switch (secinfo->flavor) { |
|
case RPC_AUTH_NULL: |
|
case RPC_AUTH_UNIX: |
|
case RPC_AUTH_GSS: |
|
flavor = rpcauth_get_pseudoflavor(secinfo->flavor, |
|
&secinfo->flavor_info); |
|
break; |
|
default: |
|
flavor = RPC_AUTH_MAXFLAVOR; |
|
break; |
|
} |
|
|
|
if (!nfs_auth_info_match(&server->auth_info, flavor)) |
|
flavor = RPC_AUTH_MAXFLAVOR; |
|
|
|
if (flavor != RPC_AUTH_MAXFLAVOR) { |
|
err = nfs4_lookup_root_sec(server, fhandle, |
|
info, flavor); |
|
if (!err) |
|
break; |
|
} |
|
} |
|
|
|
if (flavor == RPC_AUTH_MAXFLAVOR) |
|
err = -EPERM; |
|
|
|
out_freepage: |
|
put_page(page); |
|
if (err == -EACCES) |
|
return -EPERM; |
|
out: |
|
return err; |
|
} |
|
|
|
static int _nfs41_test_stateid(struct nfs_server *server, |
|
nfs4_stateid *stateid, |
|
const struct cred *cred) |
|
{ |
|
int status; |
|
struct nfs41_test_stateid_args args = { |
|
.stateid = stateid, |
|
}; |
|
struct nfs41_test_stateid_res res; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], |
|
.rpc_argp = &args, |
|
.rpc_resp = &res, |
|
.rpc_cred = cred, |
|
}; |
|
struct rpc_clnt *rpc_client = server->client; |
|
|
|
nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, |
|
&rpc_client, &msg); |
|
|
|
dprintk("NFS call test_stateid %p\n", stateid); |
|
nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); |
|
status = nfs4_call_sync_sequence(rpc_client, server, &msg, |
|
&args.seq_args, &res.seq_res); |
|
if (status != NFS_OK) { |
|
dprintk("NFS reply test_stateid: failed, %d\n", status); |
|
return status; |
|
} |
|
dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); |
|
return -res.status; |
|
} |
|
|
|
static void nfs4_handle_delay_or_session_error(struct nfs_server *server, |
|
int err, struct nfs4_exception *exception) |
|
{ |
|
exception->retry = 0; |
|
switch(err) { |
|
case -NFS4ERR_DELAY: |
|
case -NFS4ERR_RETRY_UNCACHED_REP: |
|
nfs4_handle_exception(server, err, exception); |
|
break; |
|
case -NFS4ERR_BADSESSION: |
|
case -NFS4ERR_BADSLOT: |
|
case -NFS4ERR_BAD_HIGH_SLOT: |
|
case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
|
case -NFS4ERR_DEADSESSION: |
|
nfs4_do_handle_exception(server, err, exception); |
|
} |
|
} |
|
|
|
/** |
|
* nfs41_test_stateid - perform a TEST_STATEID operation |
|
* |
|
* @server: server / transport on which to perform the operation |
|
* @stateid: state ID to test |
|
* @cred: credential |
|
* |
|
* Returns NFS_OK if the server recognizes that "stateid" is valid. |
|
* Otherwise a negative NFS4ERR value is returned if the operation |
|
* failed or the state ID is not currently valid. |
|
*/ |
|
static int nfs41_test_stateid(struct nfs_server *server, |
|
nfs4_stateid *stateid, |
|
const struct cred *cred) |
|
{ |
|
struct nfs4_exception exception = { |
|
.interruptible = true, |
|
}; |
|
int err; |
|
do { |
|
err = _nfs41_test_stateid(server, stateid, cred); |
|
nfs4_handle_delay_or_session_error(server, err, &exception); |
|
} while (exception.retry); |
|
return err; |
|
} |
|
|
|
struct nfs_free_stateid_data { |
|
struct nfs_server *server; |
|
struct nfs41_free_stateid_args args; |
|
struct nfs41_free_stateid_res res; |
|
}; |
|
|
|
static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs_free_stateid_data *data = calldata; |
|
nfs4_setup_sequence(data->server->nfs_client, |
|
&data->args.seq_args, |
|
&data->res.seq_res, |
|
task); |
|
} |
|
|
|
static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) |
|
{ |
|
struct nfs_free_stateid_data *data = calldata; |
|
|
|
nfs41_sequence_done(task, &data->res.seq_res); |
|
|
|
switch (task->tk_status) { |
|
case -NFS4ERR_DELAY: |
|
if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) |
|
rpc_restart_call_prepare(task); |
|
} |
|
} |
|
|
|
static void nfs41_free_stateid_release(void *calldata) |
|
{ |
|
kfree(calldata); |
|
} |
|
|
|
static const struct rpc_call_ops nfs41_free_stateid_ops = { |
|
.rpc_call_prepare = nfs41_free_stateid_prepare, |
|
.rpc_call_done = nfs41_free_stateid_done, |
|
.rpc_release = nfs41_free_stateid_release, |
|
}; |
|
|
|
/** |
|
* nfs41_free_stateid - perform a FREE_STATEID operation |
|
* |
|
* @server: server / transport on which to perform the operation |
|
* @stateid: state ID to release |
|
* @cred: credential |
|
* @privileged: set to true if this call needs to be privileged |
|
* |
|
* Note: this function is always asynchronous. |
|
*/ |
|
static int nfs41_free_stateid(struct nfs_server *server, |
|
const nfs4_stateid *stateid, |
|
const struct cred *cred, |
|
bool privileged) |
|
{ |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], |
|
.rpc_cred = cred, |
|
}; |
|
struct rpc_task_setup task_setup = { |
|
.rpc_client = server->client, |
|
.rpc_message = &msg, |
|
.callback_ops = &nfs41_free_stateid_ops, |
|
.flags = RPC_TASK_ASYNC, |
|
}; |
|
struct nfs_free_stateid_data *data; |
|
struct rpc_task *task; |
|
|
|
nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, |
|
&task_setup.rpc_client, &msg); |
|
|
|
dprintk("NFS call free_stateid %p\n", stateid); |
|
data = kmalloc(sizeof(*data), GFP_NOFS); |
|
if (!data) |
|
return -ENOMEM; |
|
data->server = server; |
|
nfs4_stateid_copy(&data->args.stateid, stateid); |
|
|
|
task_setup.callback_data = data; |
|
|
|
msg.rpc_argp = &data->args; |
|
msg.rpc_resp = &data->res; |
|
nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); |
|
task = rpc_run_task(&task_setup); |
|
if (IS_ERR(task)) |
|
return PTR_ERR(task); |
|
rpc_put_task(task); |
|
return 0; |
|
} |
|
|
|
static void |
|
nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
|
{ |
|
const struct cred *cred = lsp->ls_state->owner->so_cred; |
|
|
|
nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); |
|
nfs4_free_lock_state(server, lsp); |
|
} |
|
|
|
static bool nfs41_match_stateid(const nfs4_stateid *s1, |
|
const nfs4_stateid *s2) |
|
{ |
|
if (s1->type != s2->type) |
|
return false; |
|
|
|
if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) |
|
return false; |
|
|
|
if (s1->seqid == s2->seqid) |
|
return true; |
|
|
|
return s1->seqid == 0 || s2->seqid == 0; |
|
} |
|
|
|
#endif /* CONFIG_NFS_V4_1 */ |
|
|
|
static bool nfs4_match_stateid(const nfs4_stateid *s1, |
|
const nfs4_stateid *s2) |
|
{ |
|
return nfs4_stateid_match(s1, s2); |
|
} |
|
|
|
|
|
static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { |
|
.owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
|
.state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
|
.recover_open = nfs4_open_reclaim, |
|
.recover_lock = nfs4_lock_reclaim, |
|
.establish_clid = nfs4_init_clientid, |
|
.detect_trunking = nfs40_discover_server_trunking, |
|
}; |
|
|
|
#if defined(CONFIG_NFS_V4_1) |
|
static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { |
|
.owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
|
.state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
|
.recover_open = nfs4_open_reclaim, |
|
.recover_lock = nfs4_lock_reclaim, |
|
.establish_clid = nfs41_init_clientid, |
|
.reclaim_complete = nfs41_proc_reclaim_complete, |
|
.detect_trunking = nfs41_discover_server_trunking, |
|
}; |
|
#endif /* CONFIG_NFS_V4_1 */ |
|
|
|
static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { |
|
.owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
|
.state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
|
.recover_open = nfs40_open_expired, |
|
.recover_lock = nfs4_lock_expired, |
|
.establish_clid = nfs4_init_clientid, |
|
}; |
|
|
|
#if defined(CONFIG_NFS_V4_1) |
|
static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { |
|
.owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
|
.state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
|
.recover_open = nfs41_open_expired, |
|
.recover_lock = nfs41_lock_expired, |
|
.establish_clid = nfs41_init_clientid, |
|
}; |
|
#endif /* CONFIG_NFS_V4_1 */ |
|
|
|
static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { |
|
.sched_state_renewal = nfs4_proc_async_renew, |
|
.get_state_renewal_cred = nfs4_get_renew_cred, |
|
.renew_lease = nfs4_proc_renew, |
|
}; |
|
|
|
#if defined(CONFIG_NFS_V4_1) |
|
static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { |
|
.sched_state_renewal = nfs41_proc_async_sequence, |
|
.get_state_renewal_cred = nfs4_get_machine_cred, |
|
.renew_lease = nfs4_proc_sequence, |
|
}; |
|
#endif |
|
|
|
static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { |
|
.get_locations = _nfs40_proc_get_locations, |
|
.fsid_present = _nfs40_proc_fsid_present, |
|
}; |
|
|
|
#if defined(CONFIG_NFS_V4_1) |
|
static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { |
|
.get_locations = _nfs41_proc_get_locations, |
|
.fsid_present = _nfs41_proc_fsid_present, |
|
}; |
|
#endif /* CONFIG_NFS_V4_1 */ |
|
|
|
static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { |
|
.minor_version = 0, |
|
.init_caps = NFS_CAP_READDIRPLUS |
|
| NFS_CAP_ATOMIC_OPEN |
|
| NFS_CAP_POSIX_LOCK, |
|
.init_client = nfs40_init_client, |
|
.shutdown_client = nfs40_shutdown_client, |
|
.match_stateid = nfs4_match_stateid, |
|
.find_root_sec = nfs4_find_root_sec, |
|
.free_lock_state = nfs4_release_lockowner, |
|
.test_and_free_expired = nfs40_test_and_free_expired_stateid, |
|
.alloc_seqid = nfs_alloc_seqid, |
|
.call_sync_ops = &nfs40_call_sync_ops, |
|
.reboot_recovery_ops = &nfs40_reboot_recovery_ops, |
|
.nograce_recovery_ops = &nfs40_nograce_recovery_ops, |
|
.state_renewal_ops = &nfs40_state_renewal_ops, |
|
.mig_recovery_ops = &nfs40_mig_recovery_ops, |
|
}; |
|
|
|
#if defined(CONFIG_NFS_V4_1) |
|
static struct nfs_seqid * |
|
nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) |
|
{ |
|
return NULL; |
|
} |
|
|
|
static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { |
|
.minor_version = 1, |
|
.init_caps = NFS_CAP_READDIRPLUS |
|
| NFS_CAP_ATOMIC_OPEN |
|
| NFS_CAP_POSIX_LOCK |
|
| NFS_CAP_STATEID_NFSV41 |
|
| NFS_CAP_ATOMIC_OPEN_V1 |
|
| NFS_CAP_LGOPEN, |
|
.init_client = nfs41_init_client, |
|
.shutdown_client = nfs41_shutdown_client, |
|
.match_stateid = nfs41_match_stateid, |
|
.find_root_sec = nfs41_find_root_sec, |
|
.free_lock_state = nfs41_free_lock_state, |
|
.test_and_free_expired = nfs41_test_and_free_expired_stateid, |
|
.alloc_seqid = nfs_alloc_no_seqid, |
|
.session_trunk = nfs4_test_session_trunk, |
|
.call_sync_ops = &nfs41_call_sync_ops, |
|
.reboot_recovery_ops = &nfs41_reboot_recovery_ops, |
|
.nograce_recovery_ops = &nfs41_nograce_recovery_ops, |
|
.state_renewal_ops = &nfs41_state_renewal_ops, |
|
.mig_recovery_ops = &nfs41_mig_recovery_ops, |
|
}; |
|
#endif |
|
|
|
#if defined(CONFIG_NFS_V4_2) |
|
static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { |
|
.minor_version = 2, |
|
.init_caps = NFS_CAP_READDIRPLUS |
|
| NFS_CAP_ATOMIC_OPEN |
|
| NFS_CAP_POSIX_LOCK |
|
| NFS_CAP_STATEID_NFSV41 |
|
| NFS_CAP_ATOMIC_OPEN_V1 |
|
| NFS_CAP_LGOPEN |
|
| NFS_CAP_ALLOCATE |
|
| NFS_CAP_COPY |
|
| NFS_CAP_OFFLOAD_CANCEL |
|
| NFS_CAP_COPY_NOTIFY |
|
| NFS_CAP_DEALLOCATE |
|
| NFS_CAP_SEEK |
|
| NFS_CAP_LAYOUTSTATS |
|
| NFS_CAP_CLONE |
|
| NFS_CAP_LAYOUTERROR |
|
| NFS_CAP_READ_PLUS, |
|
.init_client = nfs41_init_client, |
|
.shutdown_client = nfs41_shutdown_client, |
|
.match_stateid = nfs41_match_stateid, |
|
.find_root_sec = nfs41_find_root_sec, |
|
.free_lock_state = nfs41_free_lock_state, |
|
.call_sync_ops = &nfs41_call_sync_ops, |
|
.test_and_free_expired = nfs41_test_and_free_expired_stateid, |
|
.alloc_seqid = nfs_alloc_no_seqid, |
|
.session_trunk = nfs4_test_session_trunk, |
|
.reboot_recovery_ops = &nfs41_reboot_recovery_ops, |
|
.nograce_recovery_ops = &nfs41_nograce_recovery_ops, |
|
.state_renewal_ops = &nfs41_state_renewal_ops, |
|
.mig_recovery_ops = &nfs41_mig_recovery_ops, |
|
}; |
|
#endif |
|
|
|
const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { |
|
[0] = &nfs_v4_0_minor_ops, |
|
#if defined(CONFIG_NFS_V4_1) |
|
[1] = &nfs_v4_1_minor_ops, |
|
#endif |
|
#if defined(CONFIG_NFS_V4_2) |
|
[2] = &nfs_v4_2_minor_ops, |
|
#endif |
|
}; |
|
|
|
static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) |
|
{ |
|
ssize_t error, error2, error3; |
|
|
|
error = generic_listxattr(dentry, list, size); |
|
if (error < 0) |
|
return error; |
|
if (list) { |
|
list += error; |
|
size -= error; |
|
} |
|
|
|
error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size); |
|
if (error2 < 0) |
|
return error2; |
|
|
|
if (list) { |
|
list += error2; |
|
size -= error2; |
|
} |
|
|
|
error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, size); |
|
if (error3 < 0) |
|
return error3; |
|
|
|
return error + error2 + error3; |
|
} |
|
|
|
static const struct inode_operations nfs4_dir_inode_operations = { |
|
.create = nfs_create, |
|
.lookup = nfs_lookup, |
|
.atomic_open = nfs_atomic_open, |
|
.link = nfs_link, |
|
.unlink = nfs_unlink, |
|
.symlink = nfs_symlink, |
|
.mkdir = nfs_mkdir, |
|
.rmdir = nfs_rmdir, |
|
.mknod = nfs_mknod, |
|
.rename = nfs_rename, |
|
.permission = nfs_permission, |
|
.getattr = nfs_getattr, |
|
.setattr = nfs_setattr, |
|
.listxattr = nfs4_listxattr, |
|
}; |
|
|
|
static const struct inode_operations nfs4_file_inode_operations = { |
|
.permission = nfs_permission, |
|
.getattr = nfs_getattr, |
|
.setattr = nfs_setattr, |
|
.listxattr = nfs4_listxattr, |
|
}; |
|
|
|
const struct nfs_rpc_ops nfs_v4_clientops = { |
|
.version = 4, /* protocol version */ |
|
.dentry_ops = &nfs4_dentry_operations, |
|
.dir_inode_ops = &nfs4_dir_inode_operations, |
|
.file_inode_ops = &nfs4_file_inode_operations, |
|
.file_ops = &nfs4_file_operations, |
|
.getroot = nfs4_proc_get_root, |
|
.submount = nfs4_submount, |
|
.try_get_tree = nfs4_try_get_tree, |
|
.getattr = nfs4_proc_getattr, |
|
.setattr = nfs4_proc_setattr, |
|
.lookup = nfs4_proc_lookup, |
|
.lookupp = nfs4_proc_lookupp, |
|
.access = nfs4_proc_access, |
|
.readlink = nfs4_proc_readlink, |
|
.create = nfs4_proc_create, |
|
.remove = nfs4_proc_remove, |
|
.unlink_setup = nfs4_proc_unlink_setup, |
|
.unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, |
|
.unlink_done = nfs4_proc_unlink_done, |
|
.rename_setup = nfs4_proc_rename_setup, |
|
.rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, |
|
.rename_done = nfs4_proc_rename_done, |
|
.link = nfs4_proc_link, |
|
.symlink = nfs4_proc_symlink, |
|
.mkdir = nfs4_proc_mkdir, |
|
.rmdir = nfs4_proc_rmdir, |
|
.readdir = nfs4_proc_readdir, |
|
.mknod = nfs4_proc_mknod, |
|
.statfs = nfs4_proc_statfs, |
|
.fsinfo = nfs4_proc_fsinfo, |
|
.pathconf = nfs4_proc_pathconf, |
|
.set_capabilities = nfs4_server_capabilities, |
|
.decode_dirent = nfs4_decode_dirent, |
|
.pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, |
|
.read_setup = nfs4_proc_read_setup, |
|
.read_done = nfs4_read_done, |
|
.write_setup = nfs4_proc_write_setup, |
|
.write_done = nfs4_write_done, |
|
.commit_setup = nfs4_proc_commit_setup, |
|
.commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, |
|
.commit_done = nfs4_commit_done, |
|
.lock = nfs4_proc_lock, |
|
.clear_acl_cache = nfs4_zap_acl_attr, |
|
.close_context = nfs4_close_context, |
|
.open_context = nfs4_atomic_open, |
|
.have_delegation = nfs4_have_delegation, |
|
.alloc_client = nfs4_alloc_client, |
|
.init_client = nfs4_init_client, |
|
.free_client = nfs4_free_client, |
|
.create_server = nfs4_create_server, |
|
.clone_server = nfs_clone_server, |
|
}; |
|
|
|
static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { |
|
.name = XATTR_NAME_NFSV4_ACL, |
|
.list = nfs4_xattr_list_nfs4_acl, |
|
.get = nfs4_xattr_get_nfs4_acl, |
|
.set = nfs4_xattr_set_nfs4_acl, |
|
}; |
|
|
|
#ifdef CONFIG_NFS_V4_2 |
|
static const struct xattr_handler nfs4_xattr_nfs4_user_handler = { |
|
.prefix = XATTR_USER_PREFIX, |
|
.get = nfs4_xattr_get_nfs4_user, |
|
.set = nfs4_xattr_set_nfs4_user, |
|
}; |
|
#endif |
|
|
|
const struct xattr_handler *nfs4_xattr_handlers[] = { |
|
&nfs4_xattr_nfs4_acl_handler, |
|
#ifdef CONFIG_NFS_V4_SECURITY_LABEL |
|
&nfs4_xattr_nfs4_label_handler, |
|
#endif |
|
#ifdef CONFIG_NFS_V4_2 |
|
&nfs4_xattr_nfs4_user_handler, |
|
#endif |
|
NULL |
|
}; |
|
|
|
/* |
|
* Local variables: |
|
* c-basic-offset: 8 |
|
* End: |
|
*/
|
|
|