mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
5456 lines
140 KiB
5456 lines
140 KiB
/* |
|
* Server-side XDR for NFSv4 |
|
* |
|
* Copyright (c) 2002 The Regents of the University of Michigan. |
|
* All rights reserved. |
|
* |
|
* Kendrick Smith <[email protected]> |
|
* Andy Adamson <[email protected]> |
|
* |
|
* Redistribution and use in source and binary forms, with or without |
|
* modification, are permitted provided that the following conditions |
|
* are met: |
|
* |
|
* 1. Redistributions of source code must retain the above copyright |
|
* notice, this list of conditions and the following disclaimer. |
|
* 2. Redistributions in binary form must reproduce the above copyright |
|
* notice, this list of conditions and the following disclaimer in the |
|
* documentation and/or other materials provided with the distribution. |
|
* 3. Neither the name of the University nor the names of its |
|
* contributors may be used to endorse or promote products derived |
|
* from this software without specific prior written permission. |
|
* |
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
|
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
|
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
|
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
|
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
|
*/ |
|
|
|
#include <linux/file.h> |
|
#include <linux/slab.h> |
|
#include <linux/namei.h> |
|
#include <linux/statfs.h> |
|
#include <linux/utsname.h> |
|
#include <linux/pagemap.h> |
|
#include <linux/sunrpc/svcauth_gss.h> |
|
#include <linux/sunrpc/addr.h> |
|
#include <linux/xattr.h> |
|
#include <uapi/linux/xattr.h> |
|
|
|
#include "idmap.h" |
|
#include "acl.h" |
|
#include "xdr4.h" |
|
#include "vfs.h" |
|
#include "state.h" |
|
#include "cache.h" |
|
#include "netns.h" |
|
#include "pnfs.h" |
|
#include "filecache.h" |
|
|
|
#include "trace.h" |
|
|
|
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
|
#include <linux/security.h> |
|
#endif |
|
|
|
|
|
#define NFSDDBG_FACILITY NFSDDBG_XDR |
|
|
|
const u32 nfsd_suppattrs[3][3] = { |
|
{NFSD4_SUPPORTED_ATTRS_WORD0, |
|
NFSD4_SUPPORTED_ATTRS_WORD1, |
|
NFSD4_SUPPORTED_ATTRS_WORD2}, |
|
|
|
{NFSD4_1_SUPPORTED_ATTRS_WORD0, |
|
NFSD4_1_SUPPORTED_ATTRS_WORD1, |
|
NFSD4_1_SUPPORTED_ATTRS_WORD2}, |
|
|
|
{NFSD4_1_SUPPORTED_ATTRS_WORD0, |
|
NFSD4_1_SUPPORTED_ATTRS_WORD1, |
|
NFSD4_2_SUPPORTED_ATTRS_WORD2}, |
|
}; |
|
|
|
/* |
|
* As per referral draft, the fsid for a referral MUST be different from the fsid of the containing |
|
* directory in order to indicate to the client that a filesystem boundary is present |
|
* We use a fixed fsid for a referral |
|
*/ |
|
#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL |
|
#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL |
|
|
|
static __be32 |
|
check_filename(char *str, int len) |
|
{ |
|
int i; |
|
|
|
if (len == 0) |
|
return nfserr_inval; |
|
if (len > NFS4_MAXNAMLEN) |
|
return nfserr_nametoolong; |
|
if (isdotent(str, len)) |
|
return nfserr_badname; |
|
for (i = 0; i < len; i++) |
|
if (str[i] == '/') |
|
return nfserr_badname; |
|
return 0; |
|
} |
|
|
|
static int zero_clientid(clientid_t *clid) |
|
{ |
|
return (clid->cl_boot == 0) && (clid->cl_id == 0); |
|
} |
|
|
|
/** |
|
* svcxdr_tmpalloc - allocate memory to be freed after compound processing |
|
* @argp: NFSv4 compound argument structure |
|
* @len: length of buffer to allocate |
|
* |
|
* Allocates a buffer of size @len to be freed when processing the compound |
|
* operation described in @argp finishes. |
|
*/ |
|
static void * |
|
svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len) |
|
{ |
|
struct svcxdr_tmpbuf *tb; |
|
|
|
tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL); |
|
if (!tb) |
|
return NULL; |
|
tb->next = argp->to_free; |
|
argp->to_free = tb; |
|
return tb->buf; |
|
} |
|
|
|
/* |
|
* For xdr strings that need to be passed to other kernel api's |
|
* as null-terminated strings. |
|
* |
|
* Note null-terminating in place usually isn't safe since the |
|
* buffer might end on a page boundary. |
|
*/ |
|
static char * |
|
svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len) |
|
{ |
|
char *p = svcxdr_tmpalloc(argp, len + 1); |
|
|
|
if (!p) |
|
return NULL; |
|
memcpy(p, buf, len); |
|
p[len] = '\0'; |
|
return p; |
|
} |
|
|
|
static void * |
|
svcxdr_savemem(struct nfsd4_compoundargs *argp, __be32 *p, u32 len) |
|
{ |
|
__be32 *tmp; |
|
|
|
/* |
|
* The location of the decoded data item is stable, |
|
* so @p is OK to use. This is the common case. |
|
*/ |
|
if (p != argp->xdr->scratch.iov_base) |
|
return p; |
|
|
|
tmp = svcxdr_tmpalloc(argp, len); |
|
if (!tmp) |
|
return NULL; |
|
memcpy(tmp, p, len); |
|
return tmp; |
|
} |
|
|
|
/* |
|
* NFSv4 basic data type decoders |
|
*/ |
|
|
|
/* |
|
* This helper handles variable-length opaques which belong to protocol |
|
* elements that this implementation does not support. |
|
*/ |
|
static __be32 |
|
nfsd4_decode_ignored_string(struct nfsd4_compoundargs *argp, u32 maxlen) |
|
{ |
|
u32 len; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &len) < 0) |
|
return nfserr_bad_xdr; |
|
if (maxlen && len > maxlen) |
|
return nfserr_bad_xdr; |
|
if (!xdr_inline_decode(argp->xdr, len)) |
|
return nfserr_bad_xdr; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) |
|
{ |
|
__be32 *p; |
|
u32 len; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &len) < 0) |
|
return nfserr_bad_xdr; |
|
if (len == 0 || len > NFS4_OPAQUE_LIMIT) |
|
return nfserr_bad_xdr; |
|
p = xdr_inline_decode(argp->xdr, len); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
o->data = svcxdr_savemem(argp, p, len); |
|
if (!o->data) |
|
return nfserr_jukebox; |
|
o->len = len; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_component4(struct nfsd4_compoundargs *argp, char **namp, u32 *lenp) |
|
{ |
|
__be32 *p, status; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, lenp) < 0) |
|
return nfserr_bad_xdr; |
|
p = xdr_inline_decode(argp->xdr, *lenp); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
status = check_filename((char *)p, *lenp); |
|
if (status) |
|
return status; |
|
*namp = svcxdr_savemem(argp, p, *lenp); |
|
if (!*namp) |
|
return nfserr_jukebox; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_nfstime4(struct nfsd4_compoundargs *argp, struct timespec64 *tv) |
|
{ |
|
__be32 *p; |
|
|
|
p = xdr_inline_decode(argp->xdr, XDR_UNIT * 3); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
p = xdr_decode_hyper(p, &tv->tv_sec); |
|
tv->tv_nsec = be32_to_cpup(p++); |
|
if (tv->tv_nsec >= (u32)1000000000) |
|
return nfserr_inval; |
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_verifier4(struct nfsd4_compoundargs *argp, nfs4_verifier *verf) |
|
{ |
|
__be32 *p; |
|
|
|
p = xdr_inline_decode(argp->xdr, NFS4_VERIFIER_SIZE); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
memcpy(verf->data, p, sizeof(verf->data)); |
|
return nfs_ok; |
|
} |
|
|
|
/** |
|
* nfsd4_decode_bitmap4 - Decode an NFSv4 bitmap4 |
|
* @argp: NFSv4 compound argument structure |
|
* @bmval: pointer to an array of u32's to decode into |
|
* @bmlen: size of the @bmval array |
|
* |
|
* The server needs to return nfs_ok rather than nfserr_bad_xdr when |
|
* encountering bitmaps containing bits it does not recognize. This |
|
* includes bits in bitmap words past WORDn, where WORDn is the last |
|
* bitmap WORD the implementation currently supports. Thus we are |
|
* careful here to simply ignore bits in bitmap words that this |
|
* implementation has yet to support explicitly. |
|
* |
|
* Return values: |
|
* %nfs_ok: @bmval populated successfully |
|
* %nfserr_bad_xdr: the encoded bitmap was invalid |
|
*/ |
|
static __be32 |
|
nfsd4_decode_bitmap4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen) |
|
{ |
|
u32 i, count; |
|
__be32 *p; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &count) < 0) |
|
return nfserr_bad_xdr; |
|
/* request sanity */ |
|
if (count > 1000) |
|
return nfserr_bad_xdr; |
|
p = xdr_inline_decode(argp->xdr, count << 2); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
i = 0; |
|
while (i < count) |
|
bmval[i++] = be32_to_cpup(p++); |
|
while (i < bmlen) |
|
bmval[i++] = 0; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_nfsace4(struct nfsd4_compoundargs *argp, struct nfs4_ace *ace) |
|
{ |
|
__be32 *p, status; |
|
u32 length; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &ace->type) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &ace->flag) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &ace->access_mask) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &length) < 0) |
|
return nfserr_bad_xdr; |
|
p = xdr_inline_decode(argp->xdr, length); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
ace->whotype = nfs4_acl_get_whotype((char *)p, length); |
|
if (ace->whotype != NFS4_ACL_WHO_NAMED) |
|
status = nfs_ok; |
|
else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) |
|
status = nfsd_map_name_to_gid(argp->rqstp, |
|
(char *)p, length, &ace->who_gid); |
|
else |
|
status = nfsd_map_name_to_uid(argp->rqstp, |
|
(char *)p, length, &ace->who_uid); |
|
|
|
return status; |
|
} |
|
|
|
/* A counted array of nfsace4's */ |
|
static noinline __be32 |
|
nfsd4_decode_acl(struct nfsd4_compoundargs *argp, struct nfs4_acl **acl) |
|
{ |
|
struct nfs4_ace *ace; |
|
__be32 status; |
|
u32 count; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &count) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
if (count > xdr_stream_remaining(argp->xdr) / 20) |
|
/* |
|
* Even with 4-byte names there wouldn't be |
|
* space for that many aces; something fishy is |
|
* going on: |
|
*/ |
|
return nfserr_fbig; |
|
|
|
*acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(count)); |
|
if (*acl == NULL) |
|
return nfserr_jukebox; |
|
|
|
(*acl)->naces = count; |
|
for (ace = (*acl)->aces; ace < (*acl)->aces + count; ace++) { |
|
status = nfsd4_decode_nfsace4(argp, ace); |
|
if (status) |
|
return status; |
|
} |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static noinline __be32 |
|
nfsd4_decode_security_label(struct nfsd4_compoundargs *argp, |
|
struct xdr_netobj *label) |
|
{ |
|
u32 lfs, pi, length; |
|
__be32 *p; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &lfs) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &pi) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &length) < 0) |
|
return nfserr_bad_xdr; |
|
if (length > NFS4_MAXLABELLEN) |
|
return nfserr_badlabel; |
|
p = xdr_inline_decode(argp->xdr, length); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
label->len = length; |
|
label->data = svcxdr_dupstr(argp, p, length); |
|
if (!label->data) |
|
return nfserr_jukebox; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_fattr4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen, |
|
struct iattr *iattr, struct nfs4_acl **acl, |
|
struct xdr_netobj *label, int *umask) |
|
{ |
|
unsigned int starting_pos; |
|
u32 attrlist4_count; |
|
__be32 *p, status; |
|
|
|
iattr->ia_valid = 0; |
|
status = nfsd4_decode_bitmap4(argp, bmval, bmlen); |
|
if (status) |
|
return nfserr_bad_xdr; |
|
|
|
if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 |
|
|| bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 |
|
|| bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) { |
|
if (nfsd_attrs_supported(argp->minorversion, bmval)) |
|
return nfserr_inval; |
|
return nfserr_attrnotsupp; |
|
} |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &attrlist4_count) < 0) |
|
return nfserr_bad_xdr; |
|
starting_pos = xdr_stream_pos(argp->xdr); |
|
|
|
if (bmval[0] & FATTR4_WORD0_SIZE) { |
|
u64 size; |
|
|
|
if (xdr_stream_decode_u64(argp->xdr, &size) < 0) |
|
return nfserr_bad_xdr; |
|
iattr->ia_size = size; |
|
iattr->ia_valid |= ATTR_SIZE; |
|
} |
|
if (bmval[0] & FATTR4_WORD0_ACL) { |
|
status = nfsd4_decode_acl(argp, acl); |
|
if (status) |
|
return status; |
|
} else |
|
*acl = NULL; |
|
if (bmval[1] & FATTR4_WORD1_MODE) { |
|
u32 mode; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &mode) < 0) |
|
return nfserr_bad_xdr; |
|
iattr->ia_mode = mode; |
|
iattr->ia_mode &= (S_IFMT | S_IALLUGO); |
|
iattr->ia_valid |= ATTR_MODE; |
|
} |
|
if (bmval[1] & FATTR4_WORD1_OWNER) { |
|
u32 length; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &length) < 0) |
|
return nfserr_bad_xdr; |
|
p = xdr_inline_decode(argp->xdr, length); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
status = nfsd_map_name_to_uid(argp->rqstp, (char *)p, length, |
|
&iattr->ia_uid); |
|
if (status) |
|
return status; |
|
iattr->ia_valid |= ATTR_UID; |
|
} |
|
if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { |
|
u32 length; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &length) < 0) |
|
return nfserr_bad_xdr; |
|
p = xdr_inline_decode(argp->xdr, length); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
status = nfsd_map_name_to_gid(argp->rqstp, (char *)p, length, |
|
&iattr->ia_gid); |
|
if (status) |
|
return status; |
|
iattr->ia_valid |= ATTR_GID; |
|
} |
|
if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { |
|
u32 set_it; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0) |
|
return nfserr_bad_xdr; |
|
switch (set_it) { |
|
case NFS4_SET_TO_CLIENT_TIME: |
|
status = nfsd4_decode_nfstime4(argp, &iattr->ia_atime); |
|
if (status) |
|
return status; |
|
iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); |
|
break; |
|
case NFS4_SET_TO_SERVER_TIME: |
|
iattr->ia_valid |= ATTR_ATIME; |
|
break; |
|
default: |
|
return nfserr_bad_xdr; |
|
} |
|
} |
|
if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { |
|
u32 set_it; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0) |
|
return nfserr_bad_xdr; |
|
switch (set_it) { |
|
case NFS4_SET_TO_CLIENT_TIME: |
|
status = nfsd4_decode_nfstime4(argp, &iattr->ia_mtime); |
|
if (status) |
|
return status; |
|
iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); |
|
break; |
|
case NFS4_SET_TO_SERVER_TIME: |
|
iattr->ia_valid |= ATTR_MTIME; |
|
break; |
|
default: |
|
return nfserr_bad_xdr; |
|
} |
|
} |
|
label->len = 0; |
|
if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) && |
|
bmval[2] & FATTR4_WORD2_SECURITY_LABEL) { |
|
status = nfsd4_decode_security_label(argp, label); |
|
if (status) |
|
return status; |
|
} |
|
if (bmval[2] & FATTR4_WORD2_MODE_UMASK) { |
|
u32 mode, mask; |
|
|
|
if (!umask) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &mode) < 0) |
|
return nfserr_bad_xdr; |
|
iattr->ia_mode = mode & (S_IFMT | S_IALLUGO); |
|
if (xdr_stream_decode_u32(argp->xdr, &mask) < 0) |
|
return nfserr_bad_xdr; |
|
*umask = mask & S_IRWXUGO; |
|
iattr->ia_valid |= ATTR_MODE; |
|
} |
|
|
|
/* request sanity: did attrlist4 contain the expected number of words? */ |
|
if (attrlist4_count != xdr_stream_pos(argp->xdr) - starting_pos) |
|
return nfserr_bad_xdr; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_stateid4(struct nfsd4_compoundargs *argp, stateid_t *sid) |
|
{ |
|
__be32 *p; |
|
|
|
p = xdr_inline_decode(argp->xdr, NFS4_STATEID_SIZE); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
sid->si_generation = be32_to_cpup(p++); |
|
memcpy(&sid->si_opaque, p, sizeof(sid->si_opaque)); |
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_clientid4(struct nfsd4_compoundargs *argp, clientid_t *clientid) |
|
{ |
|
__be32 *p; |
|
|
|
p = xdr_inline_decode(argp->xdr, sizeof(__be64)); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
memcpy(clientid, p, sizeof(*clientid)); |
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_state_owner4(struct nfsd4_compoundargs *argp, |
|
clientid_t *clientid, struct xdr_netobj *owner) |
|
{ |
|
__be32 status; |
|
|
|
status = nfsd4_decode_clientid4(argp, clientid); |
|
if (status) |
|
return status; |
|
return nfsd4_decode_opaque(argp, owner); |
|
} |
|
|
|
#ifdef CONFIG_NFSD_PNFS |
|
static __be32 |
|
nfsd4_decode_deviceid4(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_deviceid *devid) |
|
{ |
|
__be32 *p; |
|
|
|
p = xdr_inline_decode(argp->xdr, NFS4_DEVICEID4_SIZE); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
memcpy(devid, p, sizeof(*devid)); |
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_layoutupdate4(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_layoutcommit *lcp) |
|
{ |
|
if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_layout_type) < 0) |
|
return nfserr_bad_xdr; |
|
if (lcp->lc_layout_type < LAYOUT_NFSV4_1_FILES) |
|
return nfserr_bad_xdr; |
|
if (lcp->lc_layout_type >= LAYOUT_TYPE_MAX) |
|
return nfserr_bad_xdr; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_up_len) < 0) |
|
return nfserr_bad_xdr; |
|
if (lcp->lc_up_len > 0) { |
|
lcp->lc_up_layout = xdr_inline_decode(argp->xdr, lcp->lc_up_len); |
|
if (!lcp->lc_up_layout) |
|
return nfserr_bad_xdr; |
|
} |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_layoutreturn4(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_layoutreturn *lrp) |
|
{ |
|
__be32 status; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_return_type) < 0) |
|
return nfserr_bad_xdr; |
|
switch (lrp->lr_return_type) { |
|
case RETURN_FILE: |
|
if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.offset) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.length) < 0) |
|
return nfserr_bad_xdr; |
|
status = nfsd4_decode_stateid4(argp, &lrp->lr_sid); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u32(argp->xdr, &lrp->lrf_body_len) < 0) |
|
return nfserr_bad_xdr; |
|
if (lrp->lrf_body_len > 0) { |
|
lrp->lrf_body = xdr_inline_decode(argp->xdr, lrp->lrf_body_len); |
|
if (!lrp->lrf_body) |
|
return nfserr_bad_xdr; |
|
} |
|
break; |
|
case RETURN_FSID: |
|
case RETURN_ALL: |
|
lrp->lr_seg.offset = 0; |
|
lrp->lr_seg.length = NFS4_MAX_UINT64; |
|
break; |
|
default: |
|
return nfserr_bad_xdr; |
|
} |
|
|
|
return nfs_ok; |
|
} |
|
|
|
#endif /* CONFIG_NFSD_PNFS */ |
|
|
|
static __be32 |
|
nfsd4_decode_sessionid4(struct nfsd4_compoundargs *argp, |
|
struct nfs4_sessionid *sessionid) |
|
{ |
|
__be32 *p; |
|
|
|
p = xdr_inline_decode(argp->xdr, NFS4_MAX_SESSIONID_LEN); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
memcpy(sessionid->data, p, sizeof(sessionid->data)); |
|
return nfs_ok; |
|
} |
|
|
|
/* Defined in Appendix A of RFC 5531 */ |
|
static __be32 |
|
nfsd4_decode_authsys_parms(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_cb_sec *cbs) |
|
{ |
|
u32 stamp, gidcount, uid, gid; |
|
__be32 *p, status; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &stamp) < 0) |
|
return nfserr_bad_xdr; |
|
/* machine name */ |
|
status = nfsd4_decode_ignored_string(argp, 255); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u32(argp->xdr, &uid) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &gid) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &gidcount) < 0) |
|
return nfserr_bad_xdr; |
|
if (gidcount > 16) |
|
return nfserr_bad_xdr; |
|
p = xdr_inline_decode(argp->xdr, gidcount << 2); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
if (cbs->flavor == (u32)(-1)) { |
|
struct user_namespace *userns = nfsd_user_namespace(argp->rqstp); |
|
|
|
kuid_t kuid = make_kuid(userns, uid); |
|
kgid_t kgid = make_kgid(userns, gid); |
|
if (uid_valid(kuid) && gid_valid(kgid)) { |
|
cbs->uid = kuid; |
|
cbs->gid = kgid; |
|
cbs->flavor = RPC_AUTH_UNIX; |
|
} else { |
|
dprintk("RPC_AUTH_UNIX with invalid uid or gid, ignoring!\n"); |
|
} |
|
} |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_gss_cb_handles4(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_cb_sec *cbs) |
|
{ |
|
__be32 status; |
|
u32 service; |
|
|
|
dprintk("RPC_AUTH_GSS callback secflavor not supported!\n"); |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &service) < 0) |
|
return nfserr_bad_xdr; |
|
if (service < RPC_GSS_SVC_NONE || service > RPC_GSS_SVC_PRIVACY) |
|
return nfserr_bad_xdr; |
|
/* gcbp_handle_from_server */ |
|
status = nfsd4_decode_ignored_string(argp, 0); |
|
if (status) |
|
return status; |
|
/* gcbp_handle_from_client */ |
|
status = nfsd4_decode_ignored_string(argp, 0); |
|
if (status) |
|
return status; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
/* a counted array of callback_sec_parms4 items */ |
|
static __be32 |
|
nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs) |
|
{ |
|
u32 i, secflavor, nr_secflavs; |
|
__be32 status; |
|
|
|
/* callback_sec_params4 */ |
|
if (xdr_stream_decode_u32(argp->xdr, &nr_secflavs) < 0) |
|
return nfserr_bad_xdr; |
|
if (nr_secflavs) |
|
cbs->flavor = (u32)(-1); |
|
else |
|
/* Is this legal? Be generous, take it to mean AUTH_NONE: */ |
|
cbs->flavor = 0; |
|
|
|
for (i = 0; i < nr_secflavs; ++i) { |
|
if (xdr_stream_decode_u32(argp->xdr, &secflavor) < 0) |
|
return nfserr_bad_xdr; |
|
switch (secflavor) { |
|
case RPC_AUTH_NULL: |
|
/* void */ |
|
if (cbs->flavor == (u32)(-1)) |
|
cbs->flavor = RPC_AUTH_NULL; |
|
break; |
|
case RPC_AUTH_UNIX: |
|
status = nfsd4_decode_authsys_parms(argp, cbs); |
|
if (status) |
|
return status; |
|
break; |
|
case RPC_AUTH_GSS: |
|
status = nfsd4_decode_gss_cb_handles4(argp, cbs); |
|
if (status) |
|
return status; |
|
break; |
|
default: |
|
return nfserr_inval; |
|
} |
|
} |
|
|
|
return nfs_ok; |
|
} |
|
|
|
|
|
/* |
|
* NFSv4 operation argument decoders |
|
*/ |
|
|
|
static __be32 |
|
nfsd4_decode_access(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_access *access) |
|
{ |
|
if (xdr_stream_decode_u32(argp->xdr, &access->ac_req_access) < 0) |
|
return nfserr_bad_xdr; |
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) |
|
{ |
|
if (xdr_stream_decode_u32(argp->xdr, &close->cl_seqid) < 0) |
|
return nfserr_bad_xdr; |
|
return nfsd4_decode_stateid4(argp, &close->cl_stateid); |
|
} |
|
|
|
|
|
static __be32 |
|
nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) |
|
{ |
|
if (xdr_stream_decode_u64(argp->xdr, &commit->co_offset) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &commit->co_count) < 0) |
|
return nfserr_bad_xdr; |
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) |
|
{ |
|
__be32 *p, status; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &create->cr_type) < 0) |
|
return nfserr_bad_xdr; |
|
switch (create->cr_type) { |
|
case NF4LNK: |
|
if (xdr_stream_decode_u32(argp->xdr, &create->cr_datalen) < 0) |
|
return nfserr_bad_xdr; |
|
p = xdr_inline_decode(argp->xdr, create->cr_datalen); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen); |
|
if (!create->cr_data) |
|
return nfserr_jukebox; |
|
break; |
|
case NF4BLK: |
|
case NF4CHR: |
|
if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata1) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata2) < 0) |
|
return nfserr_bad_xdr; |
|
break; |
|
case NF4SOCK: |
|
case NF4FIFO: |
|
case NF4DIR: |
|
default: |
|
break; |
|
} |
|
status = nfsd4_decode_component4(argp, &create->cr_name, |
|
&create->cr_namelen); |
|
if (status) |
|
return status; |
|
status = nfsd4_decode_fattr4(argp, create->cr_bmval, |
|
ARRAY_SIZE(create->cr_bmval), |
|
&create->cr_iattr, &create->cr_acl, |
|
&create->cr_label, &create->cr_umask); |
|
if (status) |
|
return status; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static inline __be32 |
|
nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) |
|
{ |
|
return nfsd4_decode_stateid4(argp, &dr->dr_stateid); |
|
} |
|
|
|
static inline __be32 |
|
nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) |
|
{ |
|
return nfsd4_decode_bitmap4(argp, getattr->ga_bmval, |
|
ARRAY_SIZE(getattr->ga_bmval)); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) |
|
{ |
|
return nfsd4_decode_component4(argp, &link->li_name, &link->li_namelen); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_open_to_lock_owner4(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_lock *lock) |
|
{ |
|
__be32 status; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_open_seqid) < 0) |
|
return nfserr_bad_xdr; |
|
status = nfsd4_decode_stateid4(argp, &lock->lk_new_open_stateid); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_lock_seqid) < 0) |
|
return nfserr_bad_xdr; |
|
return nfsd4_decode_state_owner4(argp, &lock->lk_new_clientid, |
|
&lock->lk_new_owner); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_exist_lock_owner4(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_lock *lock) |
|
{ |
|
__be32 status; |
|
|
|
status = nfsd4_decode_stateid4(argp, &lock->lk_old_lock_stateid); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u32(argp->xdr, &lock->lk_old_lock_seqid) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_locker4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) |
|
{ |
|
if (xdr_stream_decode_bool(argp->xdr, &lock->lk_is_new) < 0) |
|
return nfserr_bad_xdr; |
|
if (lock->lk_is_new) |
|
return nfsd4_decode_open_to_lock_owner4(argp, lock); |
|
return nfsd4_decode_exist_lock_owner4(argp, lock); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) |
|
{ |
|
if (xdr_stream_decode_u32(argp->xdr, &lock->lk_type) < 0) |
|
return nfserr_bad_xdr; |
|
if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_bool(argp->xdr, &lock->lk_reclaim) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u64(argp->xdr, &lock->lk_offset) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u64(argp->xdr, &lock->lk_length) < 0) |
|
return nfserr_bad_xdr; |
|
return nfsd4_decode_locker4(argp, lock); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) |
|
{ |
|
if (xdr_stream_decode_u32(argp->xdr, &lockt->lt_type) < 0) |
|
return nfserr_bad_xdr; |
|
if ((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_offset) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_length) < 0) |
|
return nfserr_bad_xdr; |
|
return nfsd4_decode_state_owner4(argp, &lockt->lt_clientid, |
|
&lockt->lt_owner); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) |
|
{ |
|
__be32 status; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &locku->lu_type) < 0) |
|
return nfserr_bad_xdr; |
|
if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &locku->lu_seqid) < 0) |
|
return nfserr_bad_xdr; |
|
status = nfsd4_decode_stateid4(argp, &locku->lu_stateid); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u64(argp->xdr, &locku->lu_offset) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u64(argp->xdr, &locku->lu_length) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) |
|
{ |
|
return nfsd4_decode_component4(argp, &lookup->lo_name, &lookup->lo_len); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_createhow4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) |
|
{ |
|
__be32 status; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &open->op_createmode) < 0) |
|
return nfserr_bad_xdr; |
|
switch (open->op_createmode) { |
|
case NFS4_CREATE_UNCHECKED: |
|
case NFS4_CREATE_GUARDED: |
|
status = nfsd4_decode_fattr4(argp, open->op_bmval, |
|
ARRAY_SIZE(open->op_bmval), |
|
&open->op_iattr, &open->op_acl, |
|
&open->op_label, &open->op_umask); |
|
if (status) |
|
return status; |
|
break; |
|
case NFS4_CREATE_EXCLUSIVE: |
|
status = nfsd4_decode_verifier4(argp, &open->op_verf); |
|
if (status) |
|
return status; |
|
break; |
|
case NFS4_CREATE_EXCLUSIVE4_1: |
|
if (argp->minorversion < 1) |
|
return nfserr_bad_xdr; |
|
status = nfsd4_decode_verifier4(argp, &open->op_verf); |
|
if (status) |
|
return status; |
|
status = nfsd4_decode_fattr4(argp, open->op_bmval, |
|
ARRAY_SIZE(open->op_bmval), |
|
&open->op_iattr, &open->op_acl, |
|
&open->op_label, &open->op_umask); |
|
if (status) |
|
return status; |
|
break; |
|
default: |
|
return nfserr_bad_xdr; |
|
} |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_openflag4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) |
|
{ |
|
__be32 status; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &open->op_create) < 0) |
|
return nfserr_bad_xdr; |
|
switch (open->op_create) { |
|
case NFS4_OPEN_NOCREATE: |
|
break; |
|
case NFS4_OPEN_CREATE: |
|
status = nfsd4_decode_createhow4(argp, open); |
|
if (status) |
|
return status; |
|
break; |
|
default: |
|
return nfserr_bad_xdr; |
|
} |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when) |
|
{ |
|
u32 w; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &w) < 0) |
|
return nfserr_bad_xdr; |
|
*share_access = w & NFS4_SHARE_ACCESS_MASK; |
|
*deleg_want = w & NFS4_SHARE_WANT_MASK; |
|
if (deleg_when) |
|
*deleg_when = w & NFS4_SHARE_WHEN_MASK; |
|
|
|
switch (w & NFS4_SHARE_ACCESS_MASK) { |
|
case NFS4_SHARE_ACCESS_READ: |
|
case NFS4_SHARE_ACCESS_WRITE: |
|
case NFS4_SHARE_ACCESS_BOTH: |
|
break; |
|
default: |
|
return nfserr_bad_xdr; |
|
} |
|
w &= ~NFS4_SHARE_ACCESS_MASK; |
|
if (!w) |
|
return nfs_ok; |
|
if (!argp->minorversion) |
|
return nfserr_bad_xdr; |
|
switch (w & NFS4_SHARE_WANT_MASK) { |
|
case NFS4_SHARE_WANT_NO_PREFERENCE: |
|
case NFS4_SHARE_WANT_READ_DELEG: |
|
case NFS4_SHARE_WANT_WRITE_DELEG: |
|
case NFS4_SHARE_WANT_ANY_DELEG: |
|
case NFS4_SHARE_WANT_NO_DELEG: |
|
case NFS4_SHARE_WANT_CANCEL: |
|
break; |
|
default: |
|
return nfserr_bad_xdr; |
|
} |
|
w &= ~NFS4_SHARE_WANT_MASK; |
|
if (!w) |
|
return nfs_ok; |
|
|
|
if (!deleg_when) /* open_downgrade */ |
|
return nfserr_inval; |
|
switch (w) { |
|
case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL: |
|
case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED: |
|
case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | |
|
NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED): |
|
return nfs_ok; |
|
} |
|
return nfserr_bad_xdr; |
|
} |
|
|
|
static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) |
|
{ |
|
if (xdr_stream_decode_u32(argp->xdr, x) < 0) |
|
return nfserr_bad_xdr; |
|
/* Note: unlike access bits, deny bits may be zero. */ |
|
if (*x & ~NFS4_SHARE_DENY_BOTH) |
|
return nfserr_bad_xdr; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_open_claim4(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_open *open) |
|
{ |
|
__be32 status; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &open->op_claim_type) < 0) |
|
return nfserr_bad_xdr; |
|
switch (open->op_claim_type) { |
|
case NFS4_OPEN_CLAIM_NULL: |
|
case NFS4_OPEN_CLAIM_DELEGATE_PREV: |
|
status = nfsd4_decode_component4(argp, &open->op_fname, |
|
&open->op_fnamelen); |
|
if (status) |
|
return status; |
|
break; |
|
case NFS4_OPEN_CLAIM_PREVIOUS: |
|
if (xdr_stream_decode_u32(argp->xdr, &open->op_delegate_type) < 0) |
|
return nfserr_bad_xdr; |
|
break; |
|
case NFS4_OPEN_CLAIM_DELEGATE_CUR: |
|
status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid); |
|
if (status) |
|
return status; |
|
status = nfsd4_decode_component4(argp, &open->op_fname, |
|
&open->op_fnamelen); |
|
if (status) |
|
return status; |
|
break; |
|
case NFS4_OPEN_CLAIM_FH: |
|
case NFS4_OPEN_CLAIM_DELEG_PREV_FH: |
|
if (argp->minorversion < 1) |
|
return nfserr_bad_xdr; |
|
/* void */ |
|
break; |
|
case NFS4_OPEN_CLAIM_DELEG_CUR_FH: |
|
if (argp->minorversion < 1) |
|
return nfserr_bad_xdr; |
|
status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid); |
|
if (status) |
|
return status; |
|
break; |
|
default: |
|
return nfserr_bad_xdr; |
|
} |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) |
|
{ |
|
__be32 status; |
|
u32 dummy; |
|
|
|
memset(open->op_bmval, 0, sizeof(open->op_bmval)); |
|
open->op_iattr.ia_valid = 0; |
|
open->op_openowner = NULL; |
|
|
|
open->op_xdr_error = 0; |
|
if (xdr_stream_decode_u32(argp->xdr, &open->op_seqid) < 0) |
|
return nfserr_bad_xdr; |
|
/* deleg_want is ignored */ |
|
status = nfsd4_decode_share_access(argp, &open->op_share_access, |
|
&open->op_deleg_want, &dummy); |
|
if (status) |
|
return status; |
|
status = nfsd4_decode_share_deny(argp, &open->op_share_deny); |
|
if (status) |
|
return status; |
|
status = nfsd4_decode_state_owner4(argp, &open->op_clientid, |
|
&open->op_owner); |
|
if (status) |
|
return status; |
|
status = nfsd4_decode_openflag4(argp, open); |
|
if (status) |
|
return status; |
|
return nfsd4_decode_open_claim4(argp, open); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) |
|
{ |
|
__be32 status; |
|
|
|
if (argp->minorversion >= 1) |
|
return nfserr_notsupp; |
|
|
|
status = nfsd4_decode_stateid4(argp, &open_conf->oc_req_stateid); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u32(argp->xdr, &open_conf->oc_seqid) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) |
|
{ |
|
__be32 status; |
|
|
|
status = nfsd4_decode_stateid4(argp, &open_down->od_stateid); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u32(argp->xdr, &open_down->od_seqid) < 0) |
|
return nfserr_bad_xdr; |
|
/* deleg_want is ignored */ |
|
status = nfsd4_decode_share_access(argp, &open_down->od_share_access, |
|
&open_down->od_deleg_want, NULL); |
|
if (status) |
|
return status; |
|
return nfsd4_decode_share_deny(argp, &open_down->od_share_deny); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) |
|
{ |
|
__be32 *p; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &putfh->pf_fhlen) < 0) |
|
return nfserr_bad_xdr; |
|
if (putfh->pf_fhlen > NFS4_FHSIZE) |
|
return nfserr_bad_xdr; |
|
p = xdr_inline_decode(argp->xdr, putfh->pf_fhlen); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
putfh->pf_fhval = svcxdr_savemem(argp, p, putfh->pf_fhlen); |
|
if (!putfh->pf_fhval) |
|
return nfserr_jukebox; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p) |
|
{ |
|
if (argp->minorversion == 0) |
|
return nfs_ok; |
|
return nfserr_notsupp; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) |
|
{ |
|
__be32 status; |
|
|
|
status = nfsd4_decode_stateid4(argp, &read->rd_stateid); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u64(argp->xdr, &read->rd_offset) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &read->rd_length) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) |
|
{ |
|
__be32 status; |
|
|
|
if (xdr_stream_decode_u64(argp->xdr, &readdir->rd_cookie) < 0) |
|
return nfserr_bad_xdr; |
|
status = nfsd4_decode_verifier4(argp, &readdir->rd_verf); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_dircount) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_maxcount) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_uint32_array(argp->xdr, readdir->rd_bmval, |
|
ARRAY_SIZE(readdir->rd_bmval)) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) |
|
{ |
|
return nfsd4_decode_component4(argp, &remove->rm_name, &remove->rm_namelen); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) |
|
{ |
|
__be32 status; |
|
|
|
status = nfsd4_decode_component4(argp, &rename->rn_sname, &rename->rn_snamelen); |
|
if (status) |
|
return status; |
|
return nfsd4_decode_component4(argp, &rename->rn_tname, &rename->rn_tnamelen); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) |
|
{ |
|
return nfsd4_decode_clientid4(argp, clientid); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_secinfo *secinfo) |
|
{ |
|
return nfsd4_decode_component4(argp, &secinfo->si_name, &secinfo->si_namelen); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) |
|
{ |
|
__be32 status; |
|
|
|
status = nfsd4_decode_stateid4(argp, &setattr->sa_stateid); |
|
if (status) |
|
return status; |
|
return nfsd4_decode_fattr4(argp, setattr->sa_bmval, |
|
ARRAY_SIZE(setattr->sa_bmval), |
|
&setattr->sa_iattr, &setattr->sa_acl, |
|
&setattr->sa_label, NULL); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) |
|
{ |
|
__be32 *p, status; |
|
|
|
if (argp->minorversion >= 1) |
|
return nfserr_notsupp; |
|
|
|
status = nfsd4_decode_verifier4(argp, &setclientid->se_verf); |
|
if (status) |
|
return status; |
|
status = nfsd4_decode_opaque(argp, &setclientid->se_name); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_prog) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_netid_len) < 0) |
|
return nfserr_bad_xdr; |
|
p = xdr_inline_decode(argp->xdr, setclientid->se_callback_netid_len); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
setclientid->se_callback_netid_val = svcxdr_savemem(argp, p, |
|
setclientid->se_callback_netid_len); |
|
if (!setclientid->se_callback_netid_val) |
|
return nfserr_jukebox; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_addr_len) < 0) |
|
return nfserr_bad_xdr; |
|
p = xdr_inline_decode(argp->xdr, setclientid->se_callback_addr_len); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
setclientid->se_callback_addr_val = svcxdr_savemem(argp, p, |
|
setclientid->se_callback_addr_len); |
|
if (!setclientid->se_callback_addr_val) |
|
return nfserr_jukebox; |
|
if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_ident) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) |
|
{ |
|
__be32 status; |
|
|
|
if (argp->minorversion >= 1) |
|
return nfserr_notsupp; |
|
|
|
status = nfsd4_decode_clientid4(argp, &scd_c->sc_clientid); |
|
if (status) |
|
return status; |
|
return nfsd4_decode_verifier4(argp, &scd_c->sc_confirm); |
|
} |
|
|
|
/* Also used for NVERIFY */ |
|
static __be32 |
|
nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) |
|
{ |
|
__be32 *p, status; |
|
|
|
status = nfsd4_decode_bitmap4(argp, verify->ve_bmval, |
|
ARRAY_SIZE(verify->ve_bmval)); |
|
if (status) |
|
return status; |
|
|
|
/* For convenience's sake, we compare raw xdr'd attributes in |
|
* nfsd4_proc_verify */ |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &verify->ve_attrlen) < 0) |
|
return nfserr_bad_xdr; |
|
p = xdr_inline_decode(argp->xdr, verify->ve_attrlen); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
verify->ve_attrval = svcxdr_savemem(argp, p, verify->ve_attrlen); |
|
if (!verify->ve_attrval) |
|
return nfserr_jukebox; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) |
|
{ |
|
__be32 status; |
|
|
|
status = nfsd4_decode_stateid4(argp, &write->wr_stateid); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u64(argp->xdr, &write->wr_offset) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &write->wr_stable_how) < 0) |
|
return nfserr_bad_xdr; |
|
if (write->wr_stable_how > NFS_FILE_SYNC) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &write->wr_buflen) < 0) |
|
return nfserr_bad_xdr; |
|
if (!xdr_stream_subsegment(argp->xdr, &write->wr_payload, write->wr_buflen)) |
|
return nfserr_bad_xdr; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) |
|
{ |
|
__be32 status; |
|
|
|
if (argp->minorversion >= 1) |
|
return nfserr_notsupp; |
|
|
|
status = nfsd4_decode_state_owner4(argp, &rlockowner->rl_clientid, |
|
&rlockowner->rl_owner); |
|
if (status) |
|
return status; |
|
|
|
if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) |
|
return nfserr_inval; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc) |
|
{ |
|
if (xdr_stream_decode_u32(argp->xdr, &bc->bc_cb_program) < 0) |
|
return nfserr_bad_xdr; |
|
return nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec); |
|
} |
|
|
|
static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts) |
|
{ |
|
u32 use_conn_in_rdma_mode; |
|
__be32 status; |
|
|
|
status = nfsd4_decode_sessionid4(argp, &bcts->sessionid); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u32(argp->xdr, &bcts->dir) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &use_conn_in_rdma_mode) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_state_protect_ops(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_exchange_id *exid) |
|
{ |
|
__be32 status; |
|
|
|
status = nfsd4_decode_bitmap4(argp, exid->spo_must_enforce, |
|
ARRAY_SIZE(exid->spo_must_enforce)); |
|
if (status) |
|
return nfserr_bad_xdr; |
|
status = nfsd4_decode_bitmap4(argp, exid->spo_must_allow, |
|
ARRAY_SIZE(exid->spo_must_allow)); |
|
if (status) |
|
return nfserr_bad_xdr; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
/* |
|
* This implementation currently does not support SP4_SSV. |
|
* This decoder simply skips over these arguments. |
|
*/ |
|
static noinline __be32 |
|
nfsd4_decode_ssv_sp_parms(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_exchange_id *exid) |
|
{ |
|
u32 count, window, num_gss_handles; |
|
__be32 status; |
|
|
|
/* ssp_ops */ |
|
status = nfsd4_decode_state_protect_ops(argp, exid); |
|
if (status) |
|
return status; |
|
|
|
/* ssp_hash_algs<> */ |
|
if (xdr_stream_decode_u32(argp->xdr, &count) < 0) |
|
return nfserr_bad_xdr; |
|
while (count--) { |
|
status = nfsd4_decode_ignored_string(argp, 0); |
|
if (status) |
|
return status; |
|
} |
|
|
|
/* ssp_encr_algs<> */ |
|
if (xdr_stream_decode_u32(argp->xdr, &count) < 0) |
|
return nfserr_bad_xdr; |
|
while (count--) { |
|
status = nfsd4_decode_ignored_string(argp, 0); |
|
if (status) |
|
return status; |
|
} |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &window) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &num_gss_handles) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_state_protect4_a(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_exchange_id *exid) |
|
{ |
|
__be32 status; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &exid->spa_how) < 0) |
|
return nfserr_bad_xdr; |
|
switch (exid->spa_how) { |
|
case SP4_NONE: |
|
break; |
|
case SP4_MACH_CRED: |
|
status = nfsd4_decode_state_protect_ops(argp, exid); |
|
if (status) |
|
return status; |
|
break; |
|
case SP4_SSV: |
|
status = nfsd4_decode_ssv_sp_parms(argp, exid); |
|
if (status) |
|
return status; |
|
break; |
|
default: |
|
return nfserr_bad_xdr; |
|
} |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_nfs_impl_id4(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_exchange_id *exid) |
|
{ |
|
__be32 status; |
|
u32 count; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &count) < 0) |
|
return nfserr_bad_xdr; |
|
switch (count) { |
|
case 0: |
|
break; |
|
case 1: |
|
/* Note that RFC 8881 places no length limit on |
|
* nii_domain, but this implementation permits no |
|
* more than NFS4_OPAQUE_LIMIT bytes */ |
|
status = nfsd4_decode_opaque(argp, &exid->nii_domain); |
|
if (status) |
|
return status; |
|
/* Note that RFC 8881 places no length limit on |
|
* nii_name, but this implementation permits no |
|
* more than NFS4_OPAQUE_LIMIT bytes */ |
|
status = nfsd4_decode_opaque(argp, &exid->nii_name); |
|
if (status) |
|
return status; |
|
status = nfsd4_decode_nfstime4(argp, &exid->nii_time); |
|
if (status) |
|
return status; |
|
break; |
|
default: |
|
return nfserr_bad_xdr; |
|
} |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_exchange_id *exid) |
|
{ |
|
__be32 status; |
|
|
|
status = nfsd4_decode_verifier4(argp, &exid->verifier); |
|
if (status) |
|
return status; |
|
status = nfsd4_decode_opaque(argp, &exid->clname); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u32(argp->xdr, &exid->flags) < 0) |
|
return nfserr_bad_xdr; |
|
status = nfsd4_decode_state_protect4_a(argp, exid); |
|
if (status) |
|
return status; |
|
return nfsd4_decode_nfs_impl_id4(argp, exid); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_channel_attrs4(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_channel_attrs *ca) |
|
{ |
|
__be32 *p; |
|
|
|
p = xdr_inline_decode(argp->xdr, XDR_UNIT * 7); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
|
|
/* headerpadsz is ignored */ |
|
p++; |
|
ca->maxreq_sz = be32_to_cpup(p++); |
|
ca->maxresp_sz = be32_to_cpup(p++); |
|
ca->maxresp_cached = be32_to_cpup(p++); |
|
ca->maxops = be32_to_cpup(p++); |
|
ca->maxreqs = be32_to_cpup(p++); |
|
ca->nr_rdma_attrs = be32_to_cpup(p); |
|
switch (ca->nr_rdma_attrs) { |
|
case 0: |
|
break; |
|
case 1: |
|
if (xdr_stream_decode_u32(argp->xdr, &ca->rdma_attrs) < 0) |
|
return nfserr_bad_xdr; |
|
break; |
|
default: |
|
return nfserr_bad_xdr; |
|
} |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_create_session *sess) |
|
{ |
|
__be32 status; |
|
|
|
status = nfsd4_decode_clientid4(argp, &sess->clientid); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u32(argp->xdr, &sess->seqid) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &sess->flags) < 0) |
|
return nfserr_bad_xdr; |
|
status = nfsd4_decode_channel_attrs4(argp, &sess->fore_channel); |
|
if (status) |
|
return status; |
|
status = nfsd4_decode_channel_attrs4(argp, &sess->back_channel); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u32(argp->xdr, &sess->callback_prog) < 0) |
|
return nfserr_bad_xdr; |
|
status = nfsd4_decode_cb_sec(argp, &sess->cb_sec); |
|
if (status) |
|
return status; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_destroy_session *destroy_session) |
|
{ |
|
return nfsd4_decode_sessionid4(argp, &destroy_session->sessionid); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_free_stateid *free_stateid) |
|
{ |
|
return nfsd4_decode_stateid4(argp, &free_stateid->fr_stateid); |
|
} |
|
|
|
#ifdef CONFIG_NFSD_PNFS |
|
static __be32 |
|
nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_getdeviceinfo *gdev) |
|
{ |
|
__be32 status; |
|
|
|
status = nfsd4_decode_deviceid4(argp, &gdev->gd_devid); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_layout_type) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_maxcount) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_uint32_array(argp->xdr, |
|
&gdev->gd_notify_types, 1) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_layoutcommit *lcp) |
|
{ |
|
__be32 *p, status; |
|
|
|
if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.offset) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.length) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_bool(argp->xdr, &lcp->lc_reclaim) < 0) |
|
return nfserr_bad_xdr; |
|
status = nfsd4_decode_stateid4(argp, &lcp->lc_sid); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_newoffset) < 0) |
|
return nfserr_bad_xdr; |
|
if (lcp->lc_newoffset) { |
|
if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_last_wr) < 0) |
|
return nfserr_bad_xdr; |
|
} else |
|
lcp->lc_last_wr = 0; |
|
p = xdr_inline_decode(argp->xdr, XDR_UNIT); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
if (xdr_item_is_present(p)) { |
|
status = nfsd4_decode_nfstime4(argp, &lcp->lc_mtime); |
|
if (status) |
|
return status; |
|
} else { |
|
lcp->lc_mtime.tv_nsec = UTIME_NOW; |
|
} |
|
return nfsd4_decode_layoutupdate4(argp, lcp); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_layoutget *lgp) |
|
{ |
|
__be32 status; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_signal) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_layout_type) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_seg.iomode) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.offset) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.length) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_minlength) < 0) |
|
return nfserr_bad_xdr; |
|
status = nfsd4_decode_stateid4(argp, &lgp->lg_sid); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_maxcount) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_layoutreturn *lrp) |
|
{ |
|
if (xdr_stream_decode_bool(argp->xdr, &lrp->lr_reclaim) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_layout_type) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_seg.iomode) < 0) |
|
return nfserr_bad_xdr; |
|
return nfsd4_decode_layoutreturn4(argp, lrp); |
|
} |
|
#endif /* CONFIG_NFSD_PNFS */ |
|
|
|
static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_secinfo_no_name *sin) |
|
{ |
|
if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0) |
|
return nfserr_bad_xdr; |
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_sequence *seq) |
|
{ |
|
__be32 *p, status; |
|
|
|
status = nfsd4_decode_sessionid4(argp, &seq->sessionid); |
|
if (status) |
|
return status; |
|
p = xdr_inline_decode(argp->xdr, XDR_UNIT * 4); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
seq->seqid = be32_to_cpup(p++); |
|
seq->slotid = be32_to_cpup(p++); |
|
seq->maxslots = be32_to_cpup(p++); |
|
seq->cachethis = be32_to_cpup(p); |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid) |
|
{ |
|
struct nfsd4_test_stateid_id *stateid; |
|
__be32 status; |
|
u32 i; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &test_stateid->ts_num_ids) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
INIT_LIST_HEAD(&test_stateid->ts_stateid_list); |
|
for (i = 0; i < test_stateid->ts_num_ids; i++) { |
|
stateid = svcxdr_tmpalloc(argp, sizeof(*stateid)); |
|
if (!stateid) |
|
return nfserrno(-ENOMEM); /* XXX: not jukebox? */ |
|
INIT_LIST_HEAD(&stateid->ts_id_list); |
|
list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list); |
|
status = nfsd4_decode_stateid4(argp, &stateid->ts_id_stateid); |
|
if (status) |
|
return status; |
|
} |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_destroy_clientid *dc) |
|
{ |
|
return nfsd4_decode_clientid4(argp, &dc->clientid); |
|
} |
|
|
|
static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_reclaim_complete *rc) |
|
{ |
|
if (xdr_stream_decode_bool(argp->xdr, &rc->rca_one_fs) < 0) |
|
return nfserr_bad_xdr; |
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_fallocate *fallocate) |
|
{ |
|
__be32 status; |
|
|
|
status = nfsd4_decode_stateid4(argp, &fallocate->falloc_stateid); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_offset) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_length) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp, |
|
struct nl4_server *ns) |
|
{ |
|
struct nfs42_netaddr *naddr; |
|
__be32 *p; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &ns->nl4_type) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
/* currently support for 1 inter-server source server */ |
|
switch (ns->nl4_type) { |
|
case NL4_NETADDR: |
|
naddr = &ns->u.nl4_addr; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &naddr->netid_len) < 0) |
|
return nfserr_bad_xdr; |
|
if (naddr->netid_len > RPCBIND_MAXNETIDLEN) |
|
return nfserr_bad_xdr; |
|
|
|
p = xdr_inline_decode(argp->xdr, naddr->netid_len); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
memcpy(naddr->netid, p, naddr->netid_len); |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &naddr->addr_len) < 0) |
|
return nfserr_bad_xdr; |
|
if (naddr->addr_len > RPCBIND_MAXUADDRLEN) |
|
return nfserr_bad_xdr; |
|
|
|
p = xdr_inline_decode(argp->xdr, naddr->addr_len); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
memcpy(naddr->addr, p, naddr->addr_len); |
|
break; |
|
default: |
|
return nfserr_bad_xdr; |
|
} |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy) |
|
{ |
|
struct nl4_server *ns_dummy; |
|
u32 consecutive, i, count; |
|
__be32 status; |
|
|
|
status = nfsd4_decode_stateid4(argp, ©->cp_src_stateid); |
|
if (status) |
|
return status; |
|
status = nfsd4_decode_stateid4(argp, ©->cp_dst_stateid); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u64(argp->xdr, ©->cp_src_pos) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u64(argp->xdr, ©->cp_dst_pos) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u64(argp->xdr, ©->cp_count) < 0) |
|
return nfserr_bad_xdr; |
|
/* ca_consecutive: we always do consecutive copies */ |
|
if (xdr_stream_decode_u32(argp->xdr, &consecutive) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, ©->cp_synchronous) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &count) < 0) |
|
return nfserr_bad_xdr; |
|
copy->cp_intra = false; |
|
if (count == 0) { /* intra-server copy */ |
|
copy->cp_intra = true; |
|
return nfs_ok; |
|
} |
|
|
|
/* decode all the supplied server addresses but use only the first */ |
|
status = nfsd4_decode_nl4_server(argp, ©->cp_src); |
|
if (status) |
|
return status; |
|
|
|
ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL); |
|
if (ns_dummy == NULL) |
|
return nfserrno(-ENOMEM); /* XXX: jukebox? */ |
|
for (i = 0; i < count - 1; i++) { |
|
status = nfsd4_decode_nl4_server(argp, ns_dummy); |
|
if (status) { |
|
kfree(ns_dummy); |
|
return status; |
|
} |
|
} |
|
kfree(ns_dummy); |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_copy_notify *cn) |
|
{ |
|
__be32 status; |
|
|
|
status = nfsd4_decode_stateid4(argp, &cn->cpn_src_stateid); |
|
if (status) |
|
return status; |
|
return nfsd4_decode_nl4_server(argp, &cn->cpn_dst); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_offload_status *os) |
|
{ |
|
return nfsd4_decode_stateid4(argp, &os->stateid); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek) |
|
{ |
|
__be32 status; |
|
|
|
status = nfsd4_decode_stateid4(argp, &seek->seek_stateid); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u64(argp->xdr, &seek->seek_offset) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u32(argp->xdr, &seek->seek_whence) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone) |
|
{ |
|
__be32 status; |
|
|
|
status = nfsd4_decode_stateid4(argp, &clone->cl_src_stateid); |
|
if (status) |
|
return status; |
|
status = nfsd4_decode_stateid4(argp, &clone->cl_dst_stateid); |
|
if (status) |
|
return status; |
|
if (xdr_stream_decode_u64(argp->xdr, &clone->cl_src_pos) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u64(argp->xdr, &clone->cl_dst_pos) < 0) |
|
return nfserr_bad_xdr; |
|
if (xdr_stream_decode_u64(argp->xdr, &clone->cl_count) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
/* |
|
* XDR data that is more than PAGE_SIZE in size is normally part of a |
|
* read or write. However, the size of extended attributes is limited |
|
* by the maximum request size, and then further limited by the underlying |
|
* filesystem limits. This can exceed PAGE_SIZE (currently, XATTR_SIZE_MAX |
|
* is 64k). Since there is no kvec- or page-based interface to xattrs, |
|
* and we're not dealing with contiguous pages, we need to do some copying. |
|
*/ |
|
|
|
/* |
|
* Decode data into buffer. |
|
*/ |
|
static __be32 |
|
nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct xdr_buf *xdr, |
|
char **bufp, u32 buflen) |
|
{ |
|
struct page **pages = xdr->pages; |
|
struct kvec *head = xdr->head; |
|
char *tmp, *dp; |
|
u32 len; |
|
|
|
if (buflen <= head->iov_len) { |
|
/* |
|
* We're in luck, the head has enough space. Just return |
|
* the head, no need for copying. |
|
*/ |
|
*bufp = head->iov_base; |
|
return 0; |
|
} |
|
|
|
tmp = svcxdr_tmpalloc(argp, buflen); |
|
if (tmp == NULL) |
|
return nfserr_jukebox; |
|
|
|
dp = tmp; |
|
memcpy(dp, head->iov_base, head->iov_len); |
|
buflen -= head->iov_len; |
|
dp += head->iov_len; |
|
|
|
while (buflen > 0) { |
|
len = min_t(u32, buflen, PAGE_SIZE); |
|
memcpy(dp, page_address(*pages), len); |
|
|
|
buflen -= len; |
|
dp += len; |
|
pages++; |
|
} |
|
|
|
*bufp = tmp; |
|
return 0; |
|
} |
|
|
|
/* |
|
* Get a user extended attribute name from the XDR buffer. |
|
* It will not have the "user." prefix, so prepend it. |
|
* Lastly, check for nul characters in the name. |
|
*/ |
|
static __be32 |
|
nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep) |
|
{ |
|
char *name, *sp, *dp; |
|
u32 namelen, cnt; |
|
__be32 *p; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &namelen) < 0) |
|
return nfserr_bad_xdr; |
|
if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) |
|
return nfserr_nametoolong; |
|
if (namelen == 0) |
|
return nfserr_bad_xdr; |
|
p = xdr_inline_decode(argp->xdr, namelen); |
|
if (!p) |
|
return nfserr_bad_xdr; |
|
name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1); |
|
if (!name) |
|
return nfserr_jukebox; |
|
memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); |
|
|
|
/* |
|
* Copy the extended attribute name over while checking for 0 |
|
* characters. |
|
*/ |
|
sp = (char *)p; |
|
dp = name + XATTR_USER_PREFIX_LEN; |
|
cnt = namelen; |
|
|
|
while (cnt-- > 0) { |
|
if (*sp == '\0') |
|
return nfserr_bad_xdr; |
|
*dp++ = *sp++; |
|
} |
|
*dp = '\0'; |
|
|
|
*namep = name; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
/* |
|
* A GETXATTR op request comes without a length specifier. We just set the |
|
* maximum length for the reply based on XATTR_SIZE_MAX and the maximum |
|
* channel reply size. nfsd_getxattr will probe the length of the xattr, |
|
* check it against getxa_len, and allocate + return the value. |
|
*/ |
|
static __be32 |
|
nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_getxattr *getxattr) |
|
{ |
|
__be32 status; |
|
u32 maxcount; |
|
|
|
status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name); |
|
if (status) |
|
return status; |
|
|
|
maxcount = svc_max_payload(argp->rqstp); |
|
maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount); |
|
|
|
getxattr->getxa_len = maxcount; |
|
|
|
return status; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_setxattr *setxattr) |
|
{ |
|
u32 flags, maxcount, size; |
|
__be32 status; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &flags) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
if (flags > SETXATTR4_REPLACE) |
|
return nfserr_inval; |
|
setxattr->setxa_flags = flags; |
|
|
|
status = nfsd4_decode_xattr_name(argp, &setxattr->setxa_name); |
|
if (status) |
|
return status; |
|
|
|
maxcount = svc_max_payload(argp->rqstp); |
|
maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount); |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &size) < 0) |
|
return nfserr_bad_xdr; |
|
if (size > maxcount) |
|
return nfserr_xattr2big; |
|
|
|
setxattr->setxa_len = size; |
|
if (size > 0) { |
|
struct xdr_buf payload; |
|
|
|
if (!xdr_stream_subsegment(argp->xdr, &payload, size)) |
|
return nfserr_bad_xdr; |
|
status = nfsd4_vbuf_from_vector(argp, &payload, |
|
&setxattr->setxa_buf, size); |
|
} |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_listxattrs *listxattrs) |
|
{ |
|
u32 maxcount; |
|
|
|
if (xdr_stream_decode_u64(argp->xdr, &listxattrs->lsxa_cookie) < 0) |
|
return nfserr_bad_xdr; |
|
|
|
/* |
|
* If the cookie is too large to have even one user.x attribute |
|
* plus trailing '\0' left in a maximum size buffer, it's invalid. |
|
*/ |
|
if (listxattrs->lsxa_cookie >= |
|
(XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2))) |
|
return nfserr_badcookie; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &maxcount) < 0) |
|
return nfserr_bad_xdr; |
|
if (maxcount < 8) |
|
/* Always need at least 2 words (length and one character) */ |
|
return nfserr_inval; |
|
|
|
maxcount = min(maxcount, svc_max_payload(argp->rqstp)); |
|
listxattrs->lsxa_maxcount = maxcount; |
|
|
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp, |
|
struct nfsd4_removexattr *removexattr) |
|
{ |
|
return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name); |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) |
|
{ |
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) |
|
{ |
|
return nfserr_notsupp; |
|
} |
|
|
|
typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); |
|
|
|
static const nfsd4_dec nfsd4_dec_ops[] = { |
|
[OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, |
|
[OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, |
|
[OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, |
|
[OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, |
|
[OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, |
|
[OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, |
|
[OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, |
|
[OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, |
|
[OP_LINK] = (nfsd4_dec)nfsd4_decode_link, |
|
[OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, |
|
[OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, |
|
[OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, |
|
[OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, |
|
[OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, |
|
[OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, |
|
[OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, |
|
[OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, |
|
[OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, |
|
[OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, |
|
[OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, |
|
[OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh, |
|
[OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, |
|
[OP_READ] = (nfsd4_dec)nfsd4_decode_read, |
|
[OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, |
|
[OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, |
|
[OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, |
|
[OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, |
|
[OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, |
|
[OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, |
|
[OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, |
|
[OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, |
|
[OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, |
|
[OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, |
|
[OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, |
|
[OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, |
|
[OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, |
|
[OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, |
|
|
|
/* new operations for NFSv4.1 */ |
|
[OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl, |
|
[OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, |
|
[OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, |
|
[OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, |
|
[OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, |
|
[OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, |
|
[OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, |
|
#ifdef CONFIG_NFSD_PNFS |
|
[OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo, |
|
[OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, |
|
[OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit, |
|
[OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget, |
|
[OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn, |
|
#else |
|
[OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, |
|
[OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, |
|
[OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, |
|
[OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, |
|
[OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, |
|
#endif |
|
[OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, |
|
[OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, |
|
[OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, |
|
[OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, |
|
[OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, |
|
[OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid, |
|
[OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, |
|
|
|
/* new operations for NFSv4.2 */ |
|
[OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, |
|
[OP_COPY] = (nfsd4_dec)nfsd4_decode_copy, |
|
[OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_copy_notify, |
|
[OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, |
|
[OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp, |
|
[OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp, |
|
[OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp, |
|
[OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status, |
|
[OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status, |
|
[OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_read, |
|
[OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek, |
|
[OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp, |
|
[OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone, |
|
/* RFC 8276 extended atributes operations */ |
|
[OP_GETXATTR] = (nfsd4_dec)nfsd4_decode_getxattr, |
|
[OP_SETXATTR] = (nfsd4_dec)nfsd4_decode_setxattr, |
|
[OP_LISTXATTRS] = (nfsd4_dec)nfsd4_decode_listxattrs, |
|
[OP_REMOVEXATTR] = (nfsd4_dec)nfsd4_decode_removexattr, |
|
}; |
|
|
|
static inline bool |
|
nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op) |
|
{ |
|
if (op->opnum < FIRST_NFS4_OP) |
|
return false; |
|
else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP) |
|
return false; |
|
else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP) |
|
return false; |
|
else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP) |
|
return false; |
|
return true; |
|
} |
|
|
|
static int |
|
nfsd4_decode_compound(struct nfsd4_compoundargs *argp) |
|
{ |
|
struct nfsd4_op *op; |
|
bool cachethis = false; |
|
int auth_slack= argp->rqstp->rq_auth_slack; |
|
int max_reply = auth_slack + 8; /* opcnt, status */ |
|
int readcount = 0; |
|
int readbytes = 0; |
|
__be32 *p; |
|
int i; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &argp->taglen) < 0) |
|
return 0; |
|
max_reply += XDR_UNIT; |
|
argp->tag = NULL; |
|
if (unlikely(argp->taglen)) { |
|
if (argp->taglen > NFSD4_MAX_TAGLEN) |
|
return 0; |
|
p = xdr_inline_decode(argp->xdr, argp->taglen); |
|
if (!p) |
|
return 0; |
|
argp->tag = svcxdr_savemem(argp, p, argp->taglen); |
|
if (!argp->tag) |
|
return 0; |
|
max_reply += xdr_align_size(argp->taglen); |
|
} |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &argp->minorversion) < 0) |
|
return 0; |
|
if (xdr_stream_decode_u32(argp->xdr, &argp->opcnt) < 0) |
|
return 0; |
|
|
|
/* |
|
* NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS |
|
* here, so we return success at the xdr level so that |
|
* nfsd4_proc can handle this is an NFS-level error. |
|
*/ |
|
if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND) |
|
return 1; |
|
|
|
if (argp->opcnt > ARRAY_SIZE(argp->iops)) { |
|
argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); |
|
if (!argp->ops) { |
|
argp->ops = argp->iops; |
|
dprintk("nfsd: couldn't allocate room for COMPOUND\n"); |
|
return 0; |
|
} |
|
} |
|
|
|
if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION) |
|
argp->opcnt = 0; |
|
|
|
for (i = 0; i < argp->opcnt; i++) { |
|
op = &argp->ops[i]; |
|
op->replay = NULL; |
|
|
|
if (xdr_stream_decode_u32(argp->xdr, &op->opnum) < 0) |
|
return 0; |
|
if (nfsd4_opnum_in_range(argp, op)) { |
|
op->status = nfsd4_dec_ops[op->opnum](argp, &op->u); |
|
if (op->status != nfs_ok) |
|
trace_nfsd_compound_decode_err(argp->rqstp, |
|
argp->opcnt, i, |
|
op->opnum, |
|
op->status); |
|
} else { |
|
op->opnum = OP_ILLEGAL; |
|
op->status = nfserr_op_illegal; |
|
} |
|
op->opdesc = OPDESC(op); |
|
/* |
|
* We'll try to cache the result in the DRC if any one |
|
* op in the compound wants to be cached: |
|
*/ |
|
cachethis |= nfsd4_cache_this_op(op); |
|
|
|
if (op->opnum == OP_READ || op->opnum == OP_READ_PLUS) { |
|
readcount++; |
|
readbytes += nfsd4_max_reply(argp->rqstp, op); |
|
} else |
|
max_reply += nfsd4_max_reply(argp->rqstp, op); |
|
/* |
|
* OP_LOCK and OP_LOCKT may return a conflicting lock. |
|
* (Special case because it will just skip encoding this |
|
* if it runs out of xdr buffer space, and it is the only |
|
* operation that behaves this way.) |
|
*/ |
|
if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT) |
|
max_reply += NFS4_OPAQUE_LIMIT; |
|
|
|
if (op->status) { |
|
argp->opcnt = i+1; |
|
break; |
|
} |
|
} |
|
/* Sessions make the DRC unnecessary: */ |
|
if (argp->minorversion) |
|
cachethis = false; |
|
svc_reserve(argp->rqstp, max_reply + readbytes); |
|
argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; |
|
|
|
if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack) |
|
clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags); |
|
|
|
return 1; |
|
} |
|
|
|
static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode, |
|
struct svc_export *exp) |
|
{ |
|
if (exp->ex_flags & NFSEXP_V4ROOT) { |
|
*p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time)); |
|
*p++ = 0; |
|
} else |
|
p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode)); |
|
return p; |
|
} |
|
|
|
/* |
|
* ctime (in NFSv4, time_metadata) is not writeable, and the client |
|
* doesn't really care what resolution could theoretically be stored by |
|
* the filesystem. |
|
* |
|
* The client cares how close together changes can be while still |
|
* guaranteeing ctime changes. For most filesystems (which have |
|
* timestamps with nanosecond fields) that is limited by the resolution |
|
* of the time returned from current_time() (which I'm assuming to be |
|
* 1/HZ). |
|
*/ |
|
static __be32 *encode_time_delta(__be32 *p, struct inode *inode) |
|
{ |
|
struct timespec64 ts; |
|
u32 ns; |
|
|
|
ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran); |
|
ts = ns_to_timespec64(ns); |
|
|
|
p = xdr_encode_hyper(p, ts.tv_sec); |
|
*p++ = cpu_to_be32(ts.tv_nsec); |
|
|
|
return p; |
|
} |
|
|
|
static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c) |
|
{ |
|
*p++ = cpu_to_be32(c->atomic); |
|
p = xdr_encode_hyper(p, c->before_change); |
|
p = xdr_encode_hyper(p, c->after_change); |
|
return p; |
|
} |
|
|
|
/* Encode as an array of strings the string given with components |
|
* separated @sep, escaped with esc_enter and esc_exit. |
|
*/ |
|
static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep, |
|
char *components, char esc_enter, |
|
char esc_exit) |
|
{ |
|
__be32 *p; |
|
__be32 pathlen; |
|
int pathlen_offset; |
|
int strlen, count=0; |
|
char *str, *end, *next; |
|
|
|
dprintk("nfsd4_encode_components(%s)\n", components); |
|
|
|
pathlen_offset = xdr->buf->len; |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
return nfserr_resource; |
|
p++; /* We will fill this in with @count later */ |
|
|
|
end = str = components; |
|
while (*end) { |
|
bool found_esc = false; |
|
|
|
/* try to parse as esc_start, ..., esc_end, sep */ |
|
if (*str == esc_enter) { |
|
for (; *end && (*end != esc_exit); end++) |
|
/* find esc_exit or end of string */; |
|
next = end + 1; |
|
if (*end && (!*next || *next == sep)) { |
|
str++; |
|
found_esc = true; |
|
} |
|
} |
|
|
|
if (!found_esc) |
|
for (; *end && (*end != sep); end++) |
|
/* find sep or end of string */; |
|
|
|
strlen = end - str; |
|
if (strlen) { |
|
p = xdr_reserve_space(xdr, strlen + 4); |
|
if (!p) |
|
return nfserr_resource; |
|
p = xdr_encode_opaque(p, str, strlen); |
|
count++; |
|
} |
|
else |
|
end++; |
|
if (found_esc) |
|
end = next; |
|
|
|
str = end; |
|
} |
|
pathlen = htonl(count); |
|
write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4); |
|
return 0; |
|
} |
|
|
|
/* Encode as an array of strings the string given with components |
|
* separated @sep. |
|
*/ |
|
static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep, |
|
char *components) |
|
{ |
|
return nfsd4_encode_components_esc(xdr, sep, components, 0, 0); |
|
} |
|
|
|
/* |
|
* encode a location element of a fs_locations structure |
|
*/ |
|
static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr, |
|
struct nfsd4_fs_location *location) |
|
{ |
|
__be32 status; |
|
|
|
status = nfsd4_encode_components_esc(xdr, ':', location->hosts, |
|
'[', ']'); |
|
if (status) |
|
return status; |
|
status = nfsd4_encode_components(xdr, '/', location->path); |
|
if (status) |
|
return status; |
|
return 0; |
|
} |
|
|
|
/* |
|
* Encode a path in RFC3530 'pathname4' format |
|
*/ |
|
static __be32 nfsd4_encode_path(struct xdr_stream *xdr, |
|
const struct path *root, |
|
const struct path *path) |
|
{ |
|
struct path cur = *path; |
|
__be32 *p; |
|
struct dentry **components = NULL; |
|
unsigned int ncomponents = 0; |
|
__be32 err = nfserr_jukebox; |
|
|
|
dprintk("nfsd4_encode_components("); |
|
|
|
path_get(&cur); |
|
/* First walk the path up to the nfsd root, and store the |
|
* dentries/path components in an array. |
|
*/ |
|
for (;;) { |
|
if (path_equal(&cur, root)) |
|
break; |
|
if (cur.dentry == cur.mnt->mnt_root) { |
|
if (follow_up(&cur)) |
|
continue; |
|
goto out_free; |
|
} |
|
if ((ncomponents & 15) == 0) { |
|
struct dentry **new; |
|
new = krealloc(components, |
|
sizeof(*new) * (ncomponents + 16), |
|
GFP_KERNEL); |
|
if (!new) |
|
goto out_free; |
|
components = new; |
|
} |
|
components[ncomponents++] = cur.dentry; |
|
cur.dentry = dget_parent(cur.dentry); |
|
} |
|
err = nfserr_resource; |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_free; |
|
*p++ = cpu_to_be32(ncomponents); |
|
|
|
while (ncomponents) { |
|
struct dentry *dentry = components[ncomponents - 1]; |
|
unsigned int len; |
|
|
|
spin_lock(&dentry->d_lock); |
|
len = dentry->d_name.len; |
|
p = xdr_reserve_space(xdr, len + 4); |
|
if (!p) { |
|
spin_unlock(&dentry->d_lock); |
|
goto out_free; |
|
} |
|
p = xdr_encode_opaque(p, dentry->d_name.name, len); |
|
dprintk("/%pd", dentry); |
|
spin_unlock(&dentry->d_lock); |
|
dput(dentry); |
|
ncomponents--; |
|
} |
|
|
|
err = 0; |
|
out_free: |
|
dprintk(")\n"); |
|
while (ncomponents) |
|
dput(components[--ncomponents]); |
|
kfree(components); |
|
path_put(&cur); |
|
return err; |
|
} |
|
|
|
static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr, |
|
struct svc_rqst *rqstp, const struct path *path) |
|
{ |
|
struct svc_export *exp_ps; |
|
__be32 res; |
|
|
|
exp_ps = rqst_find_fsidzero_export(rqstp); |
|
if (IS_ERR(exp_ps)) |
|
return nfserrno(PTR_ERR(exp_ps)); |
|
res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path); |
|
exp_put(exp_ps); |
|
return res; |
|
} |
|
|
|
/* |
|
* encode a fs_locations structure |
|
*/ |
|
static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr, |
|
struct svc_rqst *rqstp, struct svc_export *exp) |
|
{ |
|
__be32 status; |
|
int i; |
|
__be32 *p; |
|
struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; |
|
|
|
status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path); |
|
if (status) |
|
return status; |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(fslocs->locations_count); |
|
for (i=0; i<fslocs->locations_count; i++) { |
|
status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]); |
|
if (status) |
|
return status; |
|
} |
|
return 0; |
|
} |
|
|
|
static u32 nfs4_file_type(umode_t mode) |
|
{ |
|
switch (mode & S_IFMT) { |
|
case S_IFIFO: return NF4FIFO; |
|
case S_IFCHR: return NF4CHR; |
|
case S_IFDIR: return NF4DIR; |
|
case S_IFBLK: return NF4BLK; |
|
case S_IFLNK: return NF4LNK; |
|
case S_IFREG: return NF4REG; |
|
case S_IFSOCK: return NF4SOCK; |
|
default: return NF4BAD; |
|
} |
|
} |
|
|
|
static inline __be32 |
|
nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp, |
|
struct nfs4_ace *ace) |
|
{ |
|
if (ace->whotype != NFS4_ACL_WHO_NAMED) |
|
return nfs4_acl_write_who(xdr, ace->whotype); |
|
else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) |
|
return nfsd4_encode_group(xdr, rqstp, ace->who_gid); |
|
else |
|
return nfsd4_encode_user(xdr, rqstp, ace->who_uid); |
|
} |
|
|
|
static inline __be32 |
|
nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types) |
|
{ |
|
__be32 *p; |
|
unsigned long i = hweight_long(layout_types); |
|
|
|
p = xdr_reserve_space(xdr, 4 + 4 * i); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
*p++ = cpu_to_be32(i); |
|
|
|
for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i) |
|
if (layout_types & (1 << i)) |
|
*p++ = cpu_to_be32(i); |
|
|
|
return 0; |
|
} |
|
|
|
#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ |
|
FATTR4_WORD0_RDATTR_ERROR) |
|
#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID |
|
#define WORD2_ABSENT_FS_ATTRS 0 |
|
|
|
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
|
static inline __be32 |
|
nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, |
|
void *context, int len) |
|
{ |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, len + 4 + 4 + 4); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
/* |
|
* For now we use a 0 here to indicate the null translation; in |
|
* the future we may place a call to translation code here. |
|
*/ |
|
*p++ = cpu_to_be32(0); /* lfs */ |
|
*p++ = cpu_to_be32(0); /* pi */ |
|
p = xdr_encode_opaque(p, context, len); |
|
return 0; |
|
} |
|
#else |
|
static inline __be32 |
|
nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, |
|
void *context, int len) |
|
{ return 0; } |
|
#endif |
|
|
|
static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err) |
|
{ |
|
/* As per referral draft: */ |
|
if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || |
|
*bmval1 & ~WORD1_ABSENT_FS_ATTRS) { |
|
if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || |
|
*bmval0 & FATTR4_WORD0_FS_LOCATIONS) |
|
*rdattr_err = NFSERR_MOVED; |
|
else |
|
return nfserr_moved; |
|
} |
|
*bmval0 &= WORD0_ABSENT_FS_ATTRS; |
|
*bmval1 &= WORD1_ABSENT_FS_ATTRS; |
|
*bmval2 &= WORD2_ABSENT_FS_ATTRS; |
|
return 0; |
|
} |
|
|
|
|
|
static int get_parent_attributes(struct svc_export *exp, struct kstat *stat) |
|
{ |
|
struct path path = exp->ex_path; |
|
int err; |
|
|
|
path_get(&path); |
|
while (follow_up(&path)) { |
|
if (path.dentry != path.mnt->mnt_root) |
|
break; |
|
} |
|
err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); |
|
path_put(&path); |
|
return err; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2) |
|
{ |
|
__be32 *p; |
|
|
|
if (bmval2) { |
|
p = xdr_reserve_space(xdr, 16); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(3); |
|
*p++ = cpu_to_be32(bmval0); |
|
*p++ = cpu_to_be32(bmval1); |
|
*p++ = cpu_to_be32(bmval2); |
|
} else if (bmval1) { |
|
p = xdr_reserve_space(xdr, 12); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(2); |
|
*p++ = cpu_to_be32(bmval0); |
|
*p++ = cpu_to_be32(bmval1); |
|
} else { |
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(1); |
|
*p++ = cpu_to_be32(bmval0); |
|
} |
|
|
|
return 0; |
|
out_resource: |
|
return nfserr_resource; |
|
} |
|
|
|
/* |
|
* Note: @fhp can be NULL; in this case, we might have to compose the filehandle |
|
* ourselves. |
|
*/ |
|
static __be32 |
|
nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, |
|
struct svc_export *exp, |
|
struct dentry *dentry, u32 *bmval, |
|
struct svc_rqst *rqstp, int ignore_crossmnt) |
|
{ |
|
u32 bmval0 = bmval[0]; |
|
u32 bmval1 = bmval[1]; |
|
u32 bmval2 = bmval[2]; |
|
struct kstat stat; |
|
struct svc_fh *tempfh = NULL; |
|
struct kstatfs statfs; |
|
__be32 *p; |
|
int starting_len = xdr->buf->len; |
|
int attrlen_offset; |
|
__be32 attrlen; |
|
u32 dummy; |
|
u64 dummy64; |
|
u32 rdattr_err = 0; |
|
__be32 status; |
|
int err; |
|
struct nfs4_acl *acl = NULL; |
|
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
|
void *context = NULL; |
|
int contextlen; |
|
#endif |
|
bool contextsupport = false; |
|
struct nfsd4_compoundres *resp = rqstp->rq_resp; |
|
u32 minorversion = resp->cstate.minorversion; |
|
struct path path = { |
|
.mnt = exp->ex_path.mnt, |
|
.dentry = dentry, |
|
}; |
|
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
|
|
|
BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); |
|
BUG_ON(!nfsd_attrs_supported(minorversion, bmval)); |
|
|
|
if (exp->ex_fslocs.migrated) { |
|
status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err); |
|
if (status) |
|
goto out; |
|
} |
|
|
|
err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); |
|
if (err) |
|
goto out_nfserr; |
|
if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE | |
|
FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) || |
|
(bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | |
|
FATTR4_WORD1_SPACE_TOTAL))) { |
|
err = vfs_statfs(&path, &statfs); |
|
if (err) |
|
goto out_nfserr; |
|
} |
|
if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { |
|
tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); |
|
status = nfserr_jukebox; |
|
if (!tempfh) |
|
goto out; |
|
fh_init(tempfh, NFS4_FHSIZE); |
|
status = fh_compose(tempfh, exp, dentry, NULL); |
|
if (status) |
|
goto out; |
|
fhp = tempfh; |
|
} |
|
if (bmval0 & FATTR4_WORD0_ACL) { |
|
err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); |
|
if (err == -EOPNOTSUPP) |
|
bmval0 &= ~FATTR4_WORD0_ACL; |
|
else if (err == -EINVAL) { |
|
status = nfserr_attrnotsupp; |
|
goto out; |
|
} else if (err != 0) |
|
goto out_nfserr; |
|
} |
|
|
|
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
|
if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) || |
|
bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { |
|
if (exp->ex_flags & NFSEXP_SECURITY_LABEL) |
|
err = security_inode_getsecctx(d_inode(dentry), |
|
&context, &contextlen); |
|
else |
|
err = -EOPNOTSUPP; |
|
contextsupport = (err == 0); |
|
if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { |
|
if (err == -EOPNOTSUPP) |
|
bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL; |
|
else if (err) |
|
goto out_nfserr; |
|
} |
|
} |
|
#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ |
|
|
|
status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2); |
|
if (status) |
|
goto out; |
|
|
|
attrlen_offset = xdr->buf->len; |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
p++; /* to be backfilled later */ |
|
|
|
if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { |
|
u32 supp[3]; |
|
|
|
memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp)); |
|
|
|
if (!IS_POSIXACL(dentry->d_inode)) |
|
supp[0] &= ~FATTR4_WORD0_ACL; |
|
if (!contextsupport) |
|
supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL; |
|
if (!supp[2]) { |
|
p = xdr_reserve_space(xdr, 12); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(2); |
|
*p++ = cpu_to_be32(supp[0]); |
|
*p++ = cpu_to_be32(supp[1]); |
|
} else { |
|
p = xdr_reserve_space(xdr, 16); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(3); |
|
*p++ = cpu_to_be32(supp[0]); |
|
*p++ = cpu_to_be32(supp[1]); |
|
*p++ = cpu_to_be32(supp[2]); |
|
} |
|
} |
|
if (bmval0 & FATTR4_WORD0_TYPE) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
dummy = nfs4_file_type(stat.mode); |
|
if (dummy == NF4BAD) { |
|
status = nfserr_serverfault; |
|
goto out; |
|
} |
|
*p++ = cpu_to_be32(dummy); |
|
} |
|
if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) |
|
*p++ = cpu_to_be32(NFS4_FH_PERSISTENT); |
|
else |
|
*p++ = cpu_to_be32(NFS4_FH_PERSISTENT| |
|
NFS4_FH_VOL_RENAME); |
|
} |
|
if (bmval0 & FATTR4_WORD0_CHANGE) { |
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
goto out_resource; |
|
p = encode_change(p, &stat, d_inode(dentry), exp); |
|
} |
|
if (bmval0 & FATTR4_WORD0_SIZE) { |
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
goto out_resource; |
|
p = xdr_encode_hyper(p, stat.size); |
|
} |
|
if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(1); |
|
} |
|
if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(1); |
|
} |
|
if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(0); |
|
} |
|
if (bmval0 & FATTR4_WORD0_FSID) { |
|
p = xdr_reserve_space(xdr, 16); |
|
if (!p) |
|
goto out_resource; |
|
if (exp->ex_fslocs.migrated) { |
|
p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR); |
|
p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR); |
|
} else switch(fsid_source(fhp)) { |
|
case FSIDSOURCE_FSID: |
|
p = xdr_encode_hyper(p, (u64)exp->ex_fsid); |
|
p = xdr_encode_hyper(p, (u64)0); |
|
break; |
|
case FSIDSOURCE_DEV: |
|
*p++ = cpu_to_be32(0); |
|
*p++ = cpu_to_be32(MAJOR(stat.dev)); |
|
*p++ = cpu_to_be32(0); |
|
*p++ = cpu_to_be32(MINOR(stat.dev)); |
|
break; |
|
case FSIDSOURCE_UUID: |
|
p = xdr_encode_opaque_fixed(p, exp->ex_uuid, |
|
EX_UUID_LEN); |
|
break; |
|
} |
|
} |
|
if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(0); |
|
} |
|
if (bmval0 & FATTR4_WORD0_LEASE_TIME) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(nn->nfsd4_lease); |
|
} |
|
if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(rdattr_err); |
|
} |
|
if (bmval0 & FATTR4_WORD0_ACL) { |
|
struct nfs4_ace *ace; |
|
|
|
if (acl == NULL) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
|
|
*p++ = cpu_to_be32(0); |
|
goto out_acl; |
|
} |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(acl->naces); |
|
|
|
for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { |
|
p = xdr_reserve_space(xdr, 4*3); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(ace->type); |
|
*p++ = cpu_to_be32(ace->flag); |
|
*p++ = cpu_to_be32(ace->access_mask & |
|
NFS4_ACE_MASK_ALL); |
|
status = nfsd4_encode_aclname(xdr, rqstp, ace); |
|
if (status) |
|
goto out; |
|
} |
|
} |
|
out_acl: |
|
if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ? |
|
ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); |
|
} |
|
if (bmval0 & FATTR4_WORD0_CANSETTIME) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(1); |
|
} |
|
if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(0); |
|
} |
|
if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(1); |
|
} |
|
if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(1); |
|
} |
|
if (bmval0 & FATTR4_WORD0_FILEHANDLE) { |
|
p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4); |
|
if (!p) |
|
goto out_resource; |
|
p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, |
|
fhp->fh_handle.fh_size); |
|
} |
|
if (bmval0 & FATTR4_WORD0_FILEID) { |
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
goto out_resource; |
|
p = xdr_encode_hyper(p, stat.ino); |
|
} |
|
if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { |
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
goto out_resource; |
|
p = xdr_encode_hyper(p, (u64) statfs.f_ffree); |
|
} |
|
if (bmval0 & FATTR4_WORD0_FILES_FREE) { |
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
goto out_resource; |
|
p = xdr_encode_hyper(p, (u64) statfs.f_ffree); |
|
} |
|
if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { |
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
goto out_resource; |
|
p = xdr_encode_hyper(p, (u64) statfs.f_files); |
|
} |
|
if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { |
|
status = nfsd4_encode_fs_locations(xdr, rqstp, exp); |
|
if (status) |
|
goto out; |
|
} |
|
if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(1); |
|
} |
|
if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { |
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
goto out_resource; |
|
p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes); |
|
} |
|
if (bmval0 & FATTR4_WORD0_MAXLINK) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(255); |
|
} |
|
if (bmval0 & FATTR4_WORD0_MAXNAME) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(statfs.f_namelen); |
|
} |
|
if (bmval0 & FATTR4_WORD0_MAXREAD) { |
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
goto out_resource; |
|
p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); |
|
} |
|
if (bmval0 & FATTR4_WORD0_MAXWRITE) { |
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
goto out_resource; |
|
p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); |
|
} |
|
if (bmval1 & FATTR4_WORD1_MODE) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(stat.mode & S_IALLUGO); |
|
} |
|
if (bmval1 & FATTR4_WORD1_NO_TRUNC) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(1); |
|
} |
|
if (bmval1 & FATTR4_WORD1_NUMLINKS) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(stat.nlink); |
|
} |
|
if (bmval1 & FATTR4_WORD1_OWNER) { |
|
status = nfsd4_encode_user(xdr, rqstp, stat.uid); |
|
if (status) |
|
goto out; |
|
} |
|
if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { |
|
status = nfsd4_encode_group(xdr, rqstp, stat.gid); |
|
if (status) |
|
goto out; |
|
} |
|
if (bmval1 & FATTR4_WORD1_RAWDEV) { |
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32((u32) MAJOR(stat.rdev)); |
|
*p++ = cpu_to_be32((u32) MINOR(stat.rdev)); |
|
} |
|
if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { |
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
goto out_resource; |
|
dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; |
|
p = xdr_encode_hyper(p, dummy64); |
|
} |
|
if (bmval1 & FATTR4_WORD1_SPACE_FREE) { |
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
goto out_resource; |
|
dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; |
|
p = xdr_encode_hyper(p, dummy64); |
|
} |
|
if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { |
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
goto out_resource; |
|
dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; |
|
p = xdr_encode_hyper(p, dummy64); |
|
} |
|
if (bmval1 & FATTR4_WORD1_SPACE_USED) { |
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
goto out_resource; |
|
dummy64 = (u64)stat.blocks << 9; |
|
p = xdr_encode_hyper(p, dummy64); |
|
} |
|
if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { |
|
p = xdr_reserve_space(xdr, 12); |
|
if (!p) |
|
goto out_resource; |
|
p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec); |
|
*p++ = cpu_to_be32(stat.atime.tv_nsec); |
|
} |
|
if (bmval1 & FATTR4_WORD1_TIME_DELTA) { |
|
p = xdr_reserve_space(xdr, 12); |
|
if (!p) |
|
goto out_resource; |
|
p = encode_time_delta(p, d_inode(dentry)); |
|
} |
|
if (bmval1 & FATTR4_WORD1_TIME_METADATA) { |
|
p = xdr_reserve_space(xdr, 12); |
|
if (!p) |
|
goto out_resource; |
|
p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec); |
|
*p++ = cpu_to_be32(stat.ctime.tv_nsec); |
|
} |
|
if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { |
|
p = xdr_reserve_space(xdr, 12); |
|
if (!p) |
|
goto out_resource; |
|
p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec); |
|
*p++ = cpu_to_be32(stat.mtime.tv_nsec); |
|
} |
|
if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { |
|
struct kstat parent_stat; |
|
u64 ino = stat.ino; |
|
|
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
goto out_resource; |
|
/* |
|
* Get parent's attributes if not ignoring crossmount |
|
* and this is the root of a cross-mounted filesystem. |
|
*/ |
|
if (ignore_crossmnt == 0 && |
|
dentry == exp->ex_path.mnt->mnt_root) { |
|
err = get_parent_attributes(exp, &parent_stat); |
|
if (err) |
|
goto out_nfserr; |
|
ino = parent_stat.ino; |
|
} |
|
p = xdr_encode_hyper(p, ino); |
|
} |
|
#ifdef CONFIG_NFSD_PNFS |
|
if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) { |
|
status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); |
|
if (status) |
|
goto out; |
|
} |
|
|
|
if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) { |
|
status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); |
|
if (status) |
|
goto out; |
|
} |
|
|
|
if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
*p++ = cpu_to_be32(stat.blksize); |
|
} |
|
#endif /* CONFIG_NFSD_PNFS */ |
|
if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { |
|
u32 supp[3]; |
|
|
|
memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp)); |
|
supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0; |
|
supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1; |
|
supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2; |
|
|
|
status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]); |
|
if (status) |
|
goto out; |
|
} |
|
|
|
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
|
if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { |
|
status = nfsd4_encode_security_label(xdr, rqstp, context, |
|
contextlen); |
|
if (status) |
|
goto out; |
|
} |
|
#endif |
|
|
|
if (bmval2 & FATTR4_WORD2_XATTR_SUPPORT) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto out_resource; |
|
err = xattr_supported_namespace(d_inode(dentry), |
|
XATTR_USER_PREFIX); |
|
*p++ = cpu_to_be32(err == 0); |
|
} |
|
|
|
attrlen = htonl(xdr->buf->len - attrlen_offset - 4); |
|
write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4); |
|
status = nfs_ok; |
|
|
|
out: |
|
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
|
if (context) |
|
security_release_secctx(context, contextlen); |
|
#endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ |
|
kfree(acl); |
|
if (tempfh) { |
|
fh_put(tempfh); |
|
kfree(tempfh); |
|
} |
|
if (status) |
|
xdr_truncate_encode(xdr, starting_len); |
|
return status; |
|
out_nfserr: |
|
status = nfserrno(err); |
|
goto out; |
|
out_resource: |
|
status = nfserr_resource; |
|
goto out; |
|
} |
|
|
|
static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr, |
|
struct xdr_buf *buf, __be32 *p, int bytes) |
|
{ |
|
xdr->scratch.iov_len = 0; |
|
memset(buf, 0, sizeof(struct xdr_buf)); |
|
buf->head[0].iov_base = p; |
|
buf->head[0].iov_len = 0; |
|
buf->len = 0; |
|
xdr->buf = buf; |
|
xdr->iov = buf->head; |
|
xdr->p = p; |
|
xdr->end = (void *)p + bytes; |
|
buf->buflen = bytes; |
|
} |
|
|
|
__be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words, |
|
struct svc_fh *fhp, struct svc_export *exp, |
|
struct dentry *dentry, u32 *bmval, |
|
struct svc_rqst *rqstp, int ignore_crossmnt) |
|
{ |
|
struct xdr_buf dummy; |
|
struct xdr_stream xdr; |
|
__be32 ret; |
|
|
|
svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2); |
|
ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp, |
|
ignore_crossmnt); |
|
*p = xdr.p; |
|
return ret; |
|
} |
|
|
|
static inline int attributes_need_mount(u32 *bmval) |
|
{ |
|
if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) |
|
return 1; |
|
if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) |
|
return 1; |
|
return 0; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd, |
|
const char *name, int namlen) |
|
{ |
|
struct svc_export *exp = cd->rd_fhp->fh_export; |
|
struct dentry *dentry; |
|
__be32 nfserr; |
|
int ignore_crossmnt = 0; |
|
|
|
dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen); |
|
if (IS_ERR(dentry)) |
|
return nfserrno(PTR_ERR(dentry)); |
|
|
|
exp_get(exp); |
|
/* |
|
* In the case of a mountpoint, the client may be asking for |
|
* attributes that are only properties of the underlying filesystem |
|
* as opposed to the cross-mounted file system. In such a case, |
|
* we will not follow the cross mount and will fill the attribtutes |
|
* directly from the mountpoint dentry. |
|
*/ |
|
if (nfsd_mountpoint(dentry, exp)) { |
|
int err; |
|
|
|
if (!(exp->ex_flags & NFSEXP_V4ROOT) |
|
&& !attributes_need_mount(cd->rd_bmval)) { |
|
ignore_crossmnt = 1; |
|
goto out_encode; |
|
} |
|
/* |
|
* Why the heck aren't we just using nfsd_lookup?? |
|
* Different "."/".." handling? Something else? |
|
* At least, add a comment here to explain.... |
|
*/ |
|
err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); |
|
if (err) { |
|
nfserr = nfserrno(err); |
|
goto out_put; |
|
} |
|
nfserr = check_nfsd_access(exp, cd->rd_rqstp); |
|
if (nfserr) |
|
goto out_put; |
|
|
|
} |
|
out_encode: |
|
nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval, |
|
cd->rd_rqstp, ignore_crossmnt); |
|
out_put: |
|
dput(dentry); |
|
exp_put(exp); |
|
return nfserr; |
|
} |
|
|
|
static __be32 * |
|
nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr) |
|
{ |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 20); |
|
if (!p) |
|
return NULL; |
|
*p++ = htonl(2); |
|
*p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ |
|
*p++ = htonl(0); /* bmval1 */ |
|
|
|
*p++ = htonl(4); /* attribute length */ |
|
*p++ = nfserr; /* no htonl */ |
|
return p; |
|
} |
|
|
|
static int |
|
nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, |
|
loff_t offset, u64 ino, unsigned int d_type) |
|
{ |
|
struct readdir_cd *ccd = ccdv; |
|
struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); |
|
struct xdr_stream *xdr = cd->xdr; |
|
int start_offset = xdr->buf->len; |
|
int cookie_offset; |
|
u32 name_and_cookie; |
|
int entry_bytes; |
|
__be32 nfserr = nfserr_toosmall; |
|
__be64 wire_offset; |
|
__be32 *p; |
|
|
|
/* In nfsv4, "." and ".." never make it onto the wire.. */ |
|
if (name && isdotent(name, namlen)) { |
|
cd->common.err = nfs_ok; |
|
return 0; |
|
} |
|
|
|
if (cd->cookie_offset) { |
|
wire_offset = cpu_to_be64(offset); |
|
write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset, |
|
&wire_offset, 8); |
|
} |
|
|
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
goto fail; |
|
*p++ = xdr_one; /* mark entry present */ |
|
cookie_offset = xdr->buf->len; |
|
p = xdr_reserve_space(xdr, 3*4 + namlen); |
|
if (!p) |
|
goto fail; |
|
p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ |
|
p = xdr_encode_array(p, name, namlen); /* name length & name */ |
|
|
|
nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen); |
|
switch (nfserr) { |
|
case nfs_ok: |
|
break; |
|
case nfserr_resource: |
|
nfserr = nfserr_toosmall; |
|
goto fail; |
|
case nfserr_noent: |
|
xdr_truncate_encode(xdr, start_offset); |
|
goto skip_entry; |
|
default: |
|
/* |
|
* If the client requested the RDATTR_ERROR attribute, |
|
* we stuff the error code into this attribute |
|
* and continue. If this attribute was not requested, |
|
* then in accordance with the spec, we fail the |
|
* entire READDIR operation(!) |
|
*/ |
|
if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) |
|
goto fail; |
|
p = nfsd4_encode_rdattr_error(xdr, nfserr); |
|
if (p == NULL) { |
|
nfserr = nfserr_toosmall; |
|
goto fail; |
|
} |
|
} |
|
nfserr = nfserr_toosmall; |
|
entry_bytes = xdr->buf->len - start_offset; |
|
if (entry_bytes > cd->rd_maxcount) |
|
goto fail; |
|
cd->rd_maxcount -= entry_bytes; |
|
/* |
|
* RFC 3530 14.2.24 describes rd_dircount as only a "hint", so |
|
* let's always let through the first entry, at least: |
|
*/ |
|
if (!cd->rd_dircount) |
|
goto fail; |
|
name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8; |
|
if (name_and_cookie > cd->rd_dircount && cd->cookie_offset) |
|
goto fail; |
|
cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie); |
|
|
|
cd->cookie_offset = cookie_offset; |
|
skip_entry: |
|
cd->common.err = nfs_ok; |
|
return 0; |
|
fail: |
|
xdr_truncate_encode(xdr, start_offset); |
|
cd->common.err = nfserr; |
|
return -EINVAL; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid) |
|
{ |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, sizeof(stateid_t)); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(sid->si_generation); |
|
p = xdr_encode_opaque_fixed(p, &sid->si_opaque, |
|
sizeof(stateid_opaque_t)); |
|
return 0; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(access->ac_supported); |
|
*p++ = cpu_to_be32(access->ac_resp_access); |
|
return 0; |
|
} |
|
|
|
static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8); |
|
if (!p) |
|
return nfserr_resource; |
|
p = xdr_encode_opaque_fixed(p, bcts->sessionid.data, |
|
NFS4_MAX_SESSIONID_LEN); |
|
*p++ = cpu_to_be32(bcts->dir); |
|
/* Upshifting from TCP to RDMA is not supported */ |
|
*p++ = cpu_to_be32(0); |
|
return 0; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
|
|
return nfsd4_encode_stateid(xdr, &close->cl_stateid); |
|
} |
|
|
|
|
|
static __be32 |
|
nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); |
|
if (!p) |
|
return nfserr_resource; |
|
p = xdr_encode_opaque_fixed(p, commit->co_verf.data, |
|
NFS4_VERIFIER_SIZE); |
|
return 0; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 20); |
|
if (!p) |
|
return nfserr_resource; |
|
encode_cinfo(p, &create->cr_cinfo); |
|
return nfsd4_encode_bitmap(xdr, create->cr_bmval[0], |
|
create->cr_bmval[1], create->cr_bmval[2]); |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) |
|
{ |
|
struct svc_fh *fhp = getattr->ga_fhp; |
|
struct xdr_stream *xdr = &resp->xdr; |
|
|
|
return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry, |
|
getattr->ga_bmval, resp->rqstp, 0); |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
struct svc_fh *fhp = *fhpp; |
|
unsigned int len; |
|
__be32 *p; |
|
|
|
len = fhp->fh_handle.fh_size; |
|
p = xdr_reserve_space(xdr, len + 4); |
|
if (!p) |
|
return nfserr_resource; |
|
p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len); |
|
return 0; |
|
} |
|
|
|
/* |
|
* Including all fields other than the name, a LOCK4denied structure requires |
|
* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. |
|
*/ |
|
static __be32 |
|
nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld) |
|
{ |
|
struct xdr_netobj *conf = &ld->ld_owner; |
|
__be32 *p; |
|
|
|
again: |
|
p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len)); |
|
if (!p) { |
|
/* |
|
* Don't fail to return the result just because we can't |
|
* return the conflicting open: |
|
*/ |
|
if (conf->len) { |
|
kfree(conf->data); |
|
conf->len = 0; |
|
conf->data = NULL; |
|
goto again; |
|
} |
|
return nfserr_resource; |
|
} |
|
p = xdr_encode_hyper(p, ld->ld_start); |
|
p = xdr_encode_hyper(p, ld->ld_length); |
|
*p++ = cpu_to_be32(ld->ld_type); |
|
if (conf->len) { |
|
p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8); |
|
p = xdr_encode_opaque(p, conf->data, conf->len); |
|
kfree(conf->data); |
|
} else { /* non - nfsv4 lock in conflict, no clientid nor owner */ |
|
p = xdr_encode_hyper(p, (u64)0); /* clientid */ |
|
*p++ = cpu_to_be32(0); /* length of owner name */ |
|
} |
|
return nfserr_denied; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
|
|
if (!nfserr) |
|
nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid); |
|
else if (nfserr == nfserr_denied) |
|
nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied); |
|
|
|
return nfserr; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
|
|
if (nfserr == nfserr_denied) |
|
nfsd4_encode_lock_denied(xdr, &lockt->lt_denied); |
|
return nfserr; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
|
|
return nfsd4_encode_stateid(xdr, &locku->lu_stateid); |
|
} |
|
|
|
|
|
static __be32 |
|
nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 20); |
|
if (!p) |
|
return nfserr_resource; |
|
p = encode_cinfo(p, &link->li_cinfo); |
|
return 0; |
|
} |
|
|
|
|
|
static __be32 |
|
nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid); |
|
if (nfserr) |
|
return nfserr; |
|
p = xdr_reserve_space(xdr, 24); |
|
if (!p) |
|
return nfserr_resource; |
|
p = encode_cinfo(p, &open->op_cinfo); |
|
*p++ = cpu_to_be32(open->op_rflags); |
|
|
|
nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1], |
|
open->op_bmval[2]); |
|
if (nfserr) |
|
return nfserr; |
|
|
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
*p++ = cpu_to_be32(open->op_delegate_type); |
|
switch (open->op_delegate_type) { |
|
case NFS4_OPEN_DELEGATE_NONE: |
|
break; |
|
case NFS4_OPEN_DELEGATE_READ: |
|
nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); |
|
if (nfserr) |
|
return nfserr; |
|
p = xdr_reserve_space(xdr, 20); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(open->op_recall); |
|
|
|
/* |
|
* TODO: ACE's in delegations |
|
*/ |
|
*p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); |
|
*p++ = cpu_to_be32(0); |
|
*p++ = cpu_to_be32(0); |
|
*p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ |
|
break; |
|
case NFS4_OPEN_DELEGATE_WRITE: |
|
nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); |
|
if (nfserr) |
|
return nfserr; |
|
p = xdr_reserve_space(xdr, 32); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(0); |
|
|
|
/* |
|
* TODO: space_limit's in delegations |
|
*/ |
|
*p++ = cpu_to_be32(NFS4_LIMIT_SIZE); |
|
*p++ = cpu_to_be32(~(u32)0); |
|
*p++ = cpu_to_be32(~(u32)0); |
|
|
|
/* |
|
* TODO: ACE's in delegations |
|
*/ |
|
*p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); |
|
*p++ = cpu_to_be32(0); |
|
*p++ = cpu_to_be32(0); |
|
*p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ |
|
break; |
|
case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ |
|
switch (open->op_why_no_deleg) { |
|
case WND4_CONTENTION: |
|
case WND4_RESOURCE: |
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(open->op_why_no_deleg); |
|
/* deleg signaling not supported yet: */ |
|
*p++ = cpu_to_be32(0); |
|
break; |
|
default: |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(open->op_why_no_deleg); |
|
} |
|
break; |
|
default: |
|
BUG(); |
|
} |
|
/* XXX save filehandle here */ |
|
return 0; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
|
|
return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid); |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
|
|
return nfsd4_encode_stateid(xdr, &od->od_stateid); |
|
} |
|
|
|
static __be32 nfsd4_encode_splice_read( |
|
struct nfsd4_compoundres *resp, |
|
struct nfsd4_read *read, |
|
struct file *file, unsigned long maxcount) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
struct xdr_buf *buf = xdr->buf; |
|
int status, space_left; |
|
u32 eof; |
|
__be32 nfserr; |
|
__be32 *p = xdr->p - 2; |
|
|
|
/* Make sure there will be room for padding if needed */ |
|
if (xdr->end - xdr->p < 1) |
|
return nfserr_resource; |
|
|
|
nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp, |
|
file, read->rd_offset, &maxcount, &eof); |
|
read->rd_length = maxcount; |
|
if (nfserr) |
|
goto out_err; |
|
status = svc_encode_result_payload(read->rd_rqstp, |
|
buf->head[0].iov_len, maxcount); |
|
if (status) { |
|
nfserr = nfserrno(status); |
|
goto out_err; |
|
} |
|
|
|
*(p++) = htonl(eof); |
|
*(p++) = htonl(maxcount); |
|
|
|
buf->page_len = maxcount; |
|
buf->len += maxcount; |
|
xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1) |
|
/ PAGE_SIZE; |
|
|
|
/* Use rest of head for padding and remaining ops: */ |
|
buf->tail[0].iov_base = xdr->p; |
|
buf->tail[0].iov_len = 0; |
|
xdr->iov = buf->tail; |
|
if (maxcount&3) { |
|
int pad = 4 - (maxcount&3); |
|
|
|
*(xdr->p++) = 0; |
|
|
|
buf->tail[0].iov_base += maxcount&3; |
|
buf->tail[0].iov_len = pad; |
|
buf->len += pad; |
|
} |
|
|
|
space_left = min_t(int, (void *)xdr->end - (void *)xdr->p, |
|
buf->buflen - buf->len); |
|
buf->buflen = buf->len + space_left; |
|
xdr->end = (__be32 *)((void *)xdr->end + space_left); |
|
|
|
return 0; |
|
|
|
out_err: |
|
/* |
|
* nfsd_splice_actor may have already messed with the |
|
* page length; reset it so as not to confuse |
|
* xdr_truncate_encode in our caller. |
|
*/ |
|
buf->page_len = 0; |
|
return nfserr; |
|
} |
|
|
|
static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, |
|
struct nfsd4_read *read, |
|
struct file *file, unsigned long maxcount) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
u32 eof; |
|
int starting_len = xdr->buf->len - 8; |
|
__be32 nfserr; |
|
__be32 tmp; |
|
int pad; |
|
|
|
read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, maxcount); |
|
if (read->rd_vlen < 0) |
|
return nfserr_resource; |
|
|
|
nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset, |
|
resp->rqstp->rq_vec, read->rd_vlen, &maxcount, |
|
&eof); |
|
read->rd_length = maxcount; |
|
if (nfserr) |
|
return nfserr; |
|
if (svc_encode_result_payload(resp->rqstp, starting_len + 8, maxcount)) |
|
return nfserr_io; |
|
xdr_truncate_encode(xdr, starting_len + 8 + xdr_align_size(maxcount)); |
|
|
|
tmp = htonl(eof); |
|
write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4); |
|
tmp = htonl(maxcount); |
|
write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); |
|
|
|
tmp = xdr_zero; |
|
pad = (maxcount&3) ? 4 - (maxcount&3) : 0; |
|
write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount, |
|
&tmp, pad); |
|
return 0; |
|
|
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_read *read) |
|
{ |
|
unsigned long maxcount; |
|
struct xdr_stream *xdr = &resp->xdr; |
|
struct file *file; |
|
int starting_len = xdr->buf->len; |
|
__be32 *p; |
|
|
|
if (nfserr) |
|
return nfserr; |
|
file = read->rd_nf->nf_file; |
|
|
|
p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */ |
|
if (!p) { |
|
WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)); |
|
return nfserr_resource; |
|
} |
|
if (resp->xdr.buf->page_len && |
|
test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) { |
|
WARN_ON_ONCE(1); |
|
return nfserr_resource; |
|
} |
|
xdr_commit_encode(xdr); |
|
|
|
maxcount = svc_max_payload(resp->rqstp); |
|
maxcount = min_t(unsigned long, maxcount, |
|
(xdr->buf->buflen - xdr->buf->len)); |
|
maxcount = min_t(unsigned long, maxcount, read->rd_length); |
|
|
|
if (file->f_op->splice_read && |
|
test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) |
|
nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount); |
|
else |
|
nfserr = nfsd4_encode_readv(resp, read, file, maxcount); |
|
|
|
if (nfserr) |
|
xdr_truncate_encode(xdr, starting_len); |
|
|
|
return nfserr; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) |
|
{ |
|
int maxcount; |
|
__be32 wire_count; |
|
int zero = 0; |
|
struct xdr_stream *xdr = &resp->xdr; |
|
int length_offset = xdr->buf->len; |
|
int status; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
return nfserr_resource; |
|
maxcount = PAGE_SIZE; |
|
|
|
p = xdr_reserve_space(xdr, maxcount); |
|
if (!p) |
|
return nfserr_resource; |
|
/* |
|
* XXX: By default, vfs_readlink() will truncate symlinks if they |
|
* would overflow the buffer. Is this kosher in NFSv4? If not, one |
|
* easy fix is: if vfs_readlink() precisely fills the buffer, assume |
|
* that truncation occurred, and return NFS4ERR_RESOURCE. |
|
*/ |
|
nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, |
|
(char *)p, &maxcount); |
|
if (nfserr == nfserr_isdir) |
|
nfserr = nfserr_inval; |
|
if (nfserr) |
|
goto out_err; |
|
status = svc_encode_result_payload(readlink->rl_rqstp, length_offset, |
|
maxcount); |
|
if (status) { |
|
nfserr = nfserrno(status); |
|
goto out_err; |
|
} |
|
|
|
wire_count = htonl(maxcount); |
|
write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4); |
|
xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4)); |
|
if (maxcount & 3) |
|
write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, |
|
&zero, 4 - (maxcount&3)); |
|
return 0; |
|
|
|
out_err: |
|
xdr_truncate_encode(xdr, length_offset); |
|
return nfserr; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) |
|
{ |
|
int maxcount; |
|
int bytes_left; |
|
loff_t offset; |
|
__be64 wire_offset; |
|
struct xdr_stream *xdr = &resp->xdr; |
|
int starting_len = xdr->buf->len; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
/* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ |
|
*p++ = cpu_to_be32(0); |
|
*p++ = cpu_to_be32(0); |
|
resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p) |
|
- (char *)resp->xdr.buf->head[0].iov_base; |
|
|
|
/* |
|
* Number of bytes left for directory entries allowing for the |
|
* final 8 bytes of the readdir and a following failed op: |
|
*/ |
|
bytes_left = xdr->buf->buflen - xdr->buf->len |
|
- COMPOUND_ERR_SLACK_SPACE - 8; |
|
if (bytes_left < 0) { |
|
nfserr = nfserr_resource; |
|
goto err_no_verf; |
|
} |
|
maxcount = svc_max_payload(resp->rqstp); |
|
maxcount = min_t(u32, readdir->rd_maxcount, maxcount); |
|
/* |
|
* Note the rfc defines rd_maxcount as the size of the |
|
* READDIR4resok structure, which includes the verifier above |
|
* and the 8 bytes encoded at the end of this function: |
|
*/ |
|
if (maxcount < 16) { |
|
nfserr = nfserr_toosmall; |
|
goto err_no_verf; |
|
} |
|
maxcount = min_t(int, maxcount-16, bytes_left); |
|
|
|
/* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */ |
|
if (!readdir->rd_dircount) |
|
readdir->rd_dircount = svc_max_payload(resp->rqstp); |
|
|
|
readdir->xdr = xdr; |
|
readdir->rd_maxcount = maxcount; |
|
readdir->common.err = 0; |
|
readdir->cookie_offset = 0; |
|
|
|
offset = readdir->rd_cookie; |
|
nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, |
|
&offset, |
|
&readdir->common, nfsd4_encode_dirent); |
|
if (nfserr == nfs_ok && |
|
readdir->common.err == nfserr_toosmall && |
|
xdr->buf->len == starting_len + 8) { |
|
/* nothing encoded; which limit did we hit?: */ |
|
if (maxcount - 16 < bytes_left) |
|
/* It was the fault of rd_maxcount: */ |
|
nfserr = nfserr_toosmall; |
|
else |
|
/* We ran out of buffer space: */ |
|
nfserr = nfserr_resource; |
|
} |
|
if (nfserr) |
|
goto err_no_verf; |
|
|
|
if (readdir->cookie_offset) { |
|
wire_offset = cpu_to_be64(offset); |
|
write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, |
|
&wire_offset, 8); |
|
} |
|
|
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) { |
|
WARN_ON_ONCE(1); |
|
goto err_no_verf; |
|
} |
|
*p++ = 0; /* no more entries */ |
|
*p++ = htonl(readdir->common.err == nfserr_eof); |
|
|
|
return 0; |
|
err_no_verf: |
|
xdr_truncate_encode(xdr, starting_len); |
|
return nfserr; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 20); |
|
if (!p) |
|
return nfserr_resource; |
|
p = encode_cinfo(p, &remove->rm_cinfo); |
|
return 0; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 40); |
|
if (!p) |
|
return nfserr_resource; |
|
p = encode_cinfo(p, &rename->rn_sinfo); |
|
p = encode_cinfo(p, &rename->rn_tinfo); |
|
return 0; |
|
} |
|
|
|
static __be32 |
|
nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp) |
|
{ |
|
u32 i, nflavs, supported; |
|
struct exp_flavor_info *flavs; |
|
struct exp_flavor_info def_flavs[2]; |
|
__be32 *p, *flavorsp; |
|
static bool report = true; |
|
|
|
if (exp->ex_nflavors) { |
|
flavs = exp->ex_flavors; |
|
nflavs = exp->ex_nflavors; |
|
} else { /* Handling of some defaults in absence of real secinfo: */ |
|
flavs = def_flavs; |
|
if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { |
|
nflavs = 2; |
|
flavs[0].pseudoflavor = RPC_AUTH_UNIX; |
|
flavs[1].pseudoflavor = RPC_AUTH_NULL; |
|
} else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { |
|
nflavs = 1; |
|
flavs[0].pseudoflavor |
|
= svcauth_gss_flavor(exp->ex_client); |
|
} else { |
|
nflavs = 1; |
|
flavs[0].pseudoflavor |
|
= exp->ex_client->flavour->flavour; |
|
} |
|
} |
|
|
|
supported = 0; |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
return nfserr_resource; |
|
flavorsp = p++; /* to be backfilled later */ |
|
|
|
for (i = 0; i < nflavs; i++) { |
|
rpc_authflavor_t pf = flavs[i].pseudoflavor; |
|
struct rpcsec_gss_info info; |
|
|
|
if (rpcauth_get_gssinfo(pf, &info) == 0) { |
|
supported++; |
|
p = xdr_reserve_space(xdr, 4 + 4 + |
|
XDR_LEN(info.oid.len) + 4 + 4); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(RPC_AUTH_GSS); |
|
p = xdr_encode_opaque(p, info.oid.data, info.oid.len); |
|
*p++ = cpu_to_be32(info.qop); |
|
*p++ = cpu_to_be32(info.service); |
|
} else if (pf < RPC_AUTH_MAXFLAVOR) { |
|
supported++; |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(pf); |
|
} else { |
|
if (report) |
|
pr_warn("NFS: SECINFO: security flavor %u " |
|
"is not supported\n", pf); |
|
} |
|
} |
|
|
|
if (nflavs != supported) |
|
report = false; |
|
*flavorsp = htonl(supported); |
|
return 0; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_secinfo *secinfo) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
|
|
return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp); |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_secinfo_no_name *secinfo) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
|
|
return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp); |
|
} |
|
|
|
/* |
|
* The SETATTR encode routine is special -- it always encodes a bitmap, |
|
* regardless of the error status. |
|
*/ |
|
static __be32 |
|
nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 16); |
|
if (!p) |
|
return nfserr_resource; |
|
if (nfserr) { |
|
*p++ = cpu_to_be32(3); |
|
*p++ = cpu_to_be32(0); |
|
*p++ = cpu_to_be32(0); |
|
*p++ = cpu_to_be32(0); |
|
} |
|
else { |
|
*p++ = cpu_to_be32(3); |
|
*p++ = cpu_to_be32(setattr->sa_bmval[0]); |
|
*p++ = cpu_to_be32(setattr->sa_bmval[1]); |
|
*p++ = cpu_to_be32(setattr->sa_bmval[2]); |
|
} |
|
return nfserr; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
if (!nfserr) { |
|
p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE); |
|
if (!p) |
|
return nfserr_resource; |
|
p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8); |
|
p = xdr_encode_opaque_fixed(p, &scd->se_confirm, |
|
NFS4_VERIFIER_SIZE); |
|
} |
|
else if (nfserr == nfserr_clid_inuse) { |
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(0); |
|
*p++ = cpu_to_be32(0); |
|
} |
|
return nfserr; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 16); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(write->wr_bytes_written); |
|
*p++ = cpu_to_be32(write->wr_how_written); |
|
p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, |
|
NFS4_VERIFIER_SIZE); |
|
return 0; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_exchange_id *exid) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
char *major_id; |
|
char *server_scope; |
|
int major_id_sz; |
|
int server_scope_sz; |
|
uint64_t minor_id = 0; |
|
struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id); |
|
|
|
major_id = nn->nfsd_name; |
|
major_id_sz = strlen(nn->nfsd_name); |
|
server_scope = nn->nfsd_name; |
|
server_scope_sz = strlen(nn->nfsd_name); |
|
|
|
p = xdr_reserve_space(xdr, |
|
8 /* eir_clientid */ + |
|
4 /* eir_sequenceid */ + |
|
4 /* eir_flags */ + |
|
4 /* spr_how */); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
p = xdr_encode_opaque_fixed(p, &exid->clientid, 8); |
|
*p++ = cpu_to_be32(exid->seqid); |
|
*p++ = cpu_to_be32(exid->flags); |
|
|
|
*p++ = cpu_to_be32(exid->spa_how); |
|
|
|
switch (exid->spa_how) { |
|
case SP4_NONE: |
|
break; |
|
case SP4_MACH_CRED: |
|
/* spo_must_enforce bitmap: */ |
|
nfserr = nfsd4_encode_bitmap(xdr, |
|
exid->spo_must_enforce[0], |
|
exid->spo_must_enforce[1], |
|
exid->spo_must_enforce[2]); |
|
if (nfserr) |
|
return nfserr; |
|
/* spo_must_allow bitmap: */ |
|
nfserr = nfsd4_encode_bitmap(xdr, |
|
exid->spo_must_allow[0], |
|
exid->spo_must_allow[1], |
|
exid->spo_must_allow[2]); |
|
if (nfserr) |
|
return nfserr; |
|
break; |
|
default: |
|
WARN_ON_ONCE(1); |
|
} |
|
|
|
p = xdr_reserve_space(xdr, |
|
8 /* so_minor_id */ + |
|
4 /* so_major_id.len */ + |
|
(XDR_QUADLEN(major_id_sz) * 4) + |
|
4 /* eir_server_scope.len */ + |
|
(XDR_QUADLEN(server_scope_sz) * 4) + |
|
4 /* eir_server_impl_id.count (0) */); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
/* The server_owner struct */ |
|
p = xdr_encode_hyper(p, minor_id); /* Minor id */ |
|
/* major id */ |
|
p = xdr_encode_opaque(p, major_id, major_id_sz); |
|
|
|
/* Server scope */ |
|
p = xdr_encode_opaque(p, server_scope, server_scope_sz); |
|
|
|
/* Implementation id */ |
|
*p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */ |
|
return 0; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_create_session *sess) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 24); |
|
if (!p) |
|
return nfserr_resource; |
|
p = xdr_encode_opaque_fixed(p, sess->sessionid.data, |
|
NFS4_MAX_SESSIONID_LEN); |
|
*p++ = cpu_to_be32(sess->seqid); |
|
*p++ = cpu_to_be32(sess->flags); |
|
|
|
p = xdr_reserve_space(xdr, 28); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(0); /* headerpadsz */ |
|
*p++ = cpu_to_be32(sess->fore_channel.maxreq_sz); |
|
*p++ = cpu_to_be32(sess->fore_channel.maxresp_sz); |
|
*p++ = cpu_to_be32(sess->fore_channel.maxresp_cached); |
|
*p++ = cpu_to_be32(sess->fore_channel.maxops); |
|
*p++ = cpu_to_be32(sess->fore_channel.maxreqs); |
|
*p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs); |
|
|
|
if (sess->fore_channel.nr_rdma_attrs) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(sess->fore_channel.rdma_attrs); |
|
} |
|
|
|
p = xdr_reserve_space(xdr, 28); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(0); /* headerpadsz */ |
|
*p++ = cpu_to_be32(sess->back_channel.maxreq_sz); |
|
*p++ = cpu_to_be32(sess->back_channel.maxresp_sz); |
|
*p++ = cpu_to_be32(sess->back_channel.maxresp_cached); |
|
*p++ = cpu_to_be32(sess->back_channel.maxops); |
|
*p++ = cpu_to_be32(sess->back_channel.maxreqs); |
|
*p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs); |
|
|
|
if (sess->back_channel.nr_rdma_attrs) { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(sess->back_channel.rdma_attrs); |
|
} |
|
return 0; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_sequence *seq) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20); |
|
if (!p) |
|
return nfserr_resource; |
|
p = xdr_encode_opaque_fixed(p, seq->sessionid.data, |
|
NFS4_MAX_SESSIONID_LEN); |
|
*p++ = cpu_to_be32(seq->seqid); |
|
*p++ = cpu_to_be32(seq->slotid); |
|
/* Note slotid's are numbered from zero: */ |
|
*p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */ |
|
*p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */ |
|
*p++ = cpu_to_be32(seq->status_flags); |
|
|
|
resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */ |
|
return 0; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_test_stateid *test_stateid) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
struct nfsd4_test_stateid_id *stateid, *next; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids)); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = htonl(test_stateid->ts_num_ids); |
|
|
|
list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { |
|
*p++ = stateid->ts_id_status; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_NFSD_PNFS |
|
static __be32 |
|
nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_getdeviceinfo *gdev) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
const struct nfsd4_layout_ops *ops; |
|
u32 starting_len = xdr->buf->len, needed_len; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
*p++ = cpu_to_be32(gdev->gd_layout_type); |
|
|
|
/* If maxcount is 0 then just update notifications */ |
|
if (gdev->gd_maxcount != 0) { |
|
ops = nfsd4_layout_ops[gdev->gd_layout_type]; |
|
nfserr = ops->encode_getdeviceinfo(xdr, gdev); |
|
if (nfserr) { |
|
/* |
|
* We don't bother to burden the layout drivers with |
|
* enforcing gd_maxcount, just tell the client to |
|
* come back with a bigger buffer if it's not enough. |
|
*/ |
|
if (xdr->buf->len + 4 > gdev->gd_maxcount) |
|
goto toosmall; |
|
return nfserr; |
|
} |
|
} |
|
|
|
if (gdev->gd_notify_types) { |
|
p = xdr_reserve_space(xdr, 4 + 4); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(1); /* bitmap length */ |
|
*p++ = cpu_to_be32(gdev->gd_notify_types); |
|
} else { |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = 0; |
|
} |
|
|
|
return 0; |
|
toosmall: |
|
dprintk("%s: maxcount too small\n", __func__); |
|
needed_len = xdr->buf->len + 4 /* notifications */; |
|
xdr_truncate_encode(xdr, starting_len); |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(needed_len); |
|
return nfserr_toosmall; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_layoutget *lgp) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
const struct nfsd4_layout_ops *ops; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t)); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
*p++ = cpu_to_be32(1); /* we always set return-on-close */ |
|
*p++ = cpu_to_be32(lgp->lg_sid.si_generation); |
|
p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque, |
|
sizeof(stateid_opaque_t)); |
|
|
|
*p++ = cpu_to_be32(1); /* we always return a single layout */ |
|
p = xdr_encode_hyper(p, lgp->lg_seg.offset); |
|
p = xdr_encode_hyper(p, lgp->lg_seg.length); |
|
*p++ = cpu_to_be32(lgp->lg_seg.iomode); |
|
*p++ = cpu_to_be32(lgp->lg_layout_type); |
|
|
|
ops = nfsd4_layout_ops[lgp->lg_layout_type]; |
|
return ops->encode_layoutget(xdr, lgp); |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_layoutcommit *lcp) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(lcp->lc_size_chg); |
|
if (lcp->lc_size_chg) { |
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) |
|
return nfserr_resource; |
|
p = xdr_encode_hyper(p, lcp->lc_newsize); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_layoutreturn *lrp) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
return nfserr_resource; |
|
*p++ = cpu_to_be32(lrp->lrs_present); |
|
if (lrp->lrs_present) |
|
return nfsd4_encode_stateid(xdr, &lrp->lr_sid); |
|
return 0; |
|
} |
|
#endif /* CONFIG_NFSD_PNFS */ |
|
|
|
static __be32 |
|
nfsd42_encode_write_res(struct nfsd4_compoundres *resp, |
|
struct nfsd42_write_res *write, bool sync) |
|
{ |
|
__be32 *p; |
|
p = xdr_reserve_space(&resp->xdr, 4); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
if (sync) |
|
*p++ = cpu_to_be32(0); |
|
else { |
|
__be32 nfserr; |
|
*p++ = cpu_to_be32(1); |
|
nfserr = nfsd4_encode_stateid(&resp->xdr, &write->cb_stateid); |
|
if (nfserr) |
|
return nfserr; |
|
} |
|
p = xdr_reserve_space(&resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
p = xdr_encode_hyper(p, write->wr_bytes_written); |
|
*p++ = cpu_to_be32(write->wr_stable_how); |
|
p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, |
|
NFS4_VERIFIER_SIZE); |
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
struct nfs42_netaddr *addr; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 4); |
|
*p++ = cpu_to_be32(ns->nl4_type); |
|
|
|
switch (ns->nl4_type) { |
|
case NL4_NETADDR: |
|
addr = &ns->u.nl4_addr; |
|
|
|
/* netid_len, netid, uaddr_len, uaddr (port included |
|
* in RPCBIND_MAXUADDRLEN) |
|
*/ |
|
p = xdr_reserve_space(xdr, |
|
4 /* netid len */ + |
|
(XDR_QUADLEN(addr->netid_len) * 4) + |
|
4 /* uaddr len */ + |
|
(XDR_QUADLEN(addr->addr_len) * 4)); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
*p++ = cpu_to_be32(addr->netid_len); |
|
p = xdr_encode_opaque_fixed(p, addr->netid, |
|
addr->netid_len); |
|
*p++ = cpu_to_be32(addr->addr_len); |
|
p = xdr_encode_opaque_fixed(p, addr->addr, |
|
addr->addr_len); |
|
break; |
|
default: |
|
WARN_ON_ONCE(ns->nl4_type != NL4_NETADDR); |
|
return nfserr_inval; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_copy *copy) |
|
{ |
|
__be32 *p; |
|
|
|
nfserr = nfsd42_encode_write_res(resp, ©->cp_res, |
|
!!copy->cp_synchronous); |
|
if (nfserr) |
|
return nfserr; |
|
|
|
p = xdr_reserve_space(&resp->xdr, 4 + 4); |
|
*p++ = xdr_one; /* cr_consecutive */ |
|
*p++ = cpu_to_be32(copy->cp_synchronous); |
|
return 0; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_offload_status *os) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 8 + 4); |
|
if (!p) |
|
return nfserr_resource; |
|
p = xdr_encode_hyper(p, os->count); |
|
*p++ = cpu_to_be32(0); |
|
return nfserr; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp, |
|
struct nfsd4_read *read, |
|
unsigned long *maxcount, u32 *eof, |
|
loff_t *pos) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
struct file *file = read->rd_nf->nf_file; |
|
int starting_len = xdr->buf->len; |
|
loff_t hole_pos; |
|
__be32 nfserr; |
|
__be32 *p, tmp; |
|
__be64 tmp64; |
|
|
|
hole_pos = pos ? *pos : vfs_llseek(file, read->rd_offset, SEEK_HOLE); |
|
if (hole_pos > read->rd_offset) |
|
*maxcount = min_t(unsigned long, *maxcount, hole_pos - read->rd_offset); |
|
*maxcount = min_t(unsigned long, *maxcount, (xdr->buf->buflen - xdr->buf->len)); |
|
|
|
/* Content type, offset, byte count */ |
|
p = xdr_reserve_space(xdr, 4 + 8 + 4); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, *maxcount); |
|
if (read->rd_vlen < 0) |
|
return nfserr_resource; |
|
|
|
nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset, |
|
resp->rqstp->rq_vec, read->rd_vlen, maxcount, eof); |
|
if (nfserr) |
|
return nfserr; |
|
xdr_truncate_encode(xdr, starting_len + 16 + xdr_align_size(*maxcount)); |
|
|
|
tmp = htonl(NFS4_CONTENT_DATA); |
|
write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4); |
|
tmp64 = cpu_to_be64(read->rd_offset); |
|
write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp64, 8); |
|
tmp = htonl(*maxcount); |
|
write_bytes_to_xdr_buf(xdr->buf, starting_len + 12, &tmp, 4); |
|
|
|
tmp = xdr_zero; |
|
write_bytes_to_xdr_buf(xdr->buf, starting_len + 16 + *maxcount, &tmp, |
|
xdr_pad_size(*maxcount)); |
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_read_plus_hole(struct nfsd4_compoundres *resp, |
|
struct nfsd4_read *read, |
|
unsigned long *maxcount, u32 *eof) |
|
{ |
|
struct file *file = read->rd_nf->nf_file; |
|
loff_t data_pos = vfs_llseek(file, read->rd_offset, SEEK_DATA); |
|
loff_t f_size = i_size_read(file_inode(file)); |
|
unsigned long count; |
|
__be32 *p; |
|
|
|
if (data_pos == -ENXIO) |
|
data_pos = f_size; |
|
else if (data_pos <= read->rd_offset || (data_pos < f_size && data_pos % PAGE_SIZE)) |
|
return nfsd4_encode_read_plus_data(resp, read, maxcount, eof, &f_size); |
|
count = data_pos - read->rd_offset; |
|
|
|
/* Content type, offset, byte count */ |
|
p = xdr_reserve_space(&resp->xdr, 4 + 8 + 8); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
*p++ = htonl(NFS4_CONTENT_HOLE); |
|
p = xdr_encode_hyper(p, read->rd_offset); |
|
p = xdr_encode_hyper(p, count); |
|
|
|
*eof = (read->rd_offset + count) >= f_size; |
|
*maxcount = min_t(unsigned long, count, *maxcount); |
|
return nfs_ok; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_read *read) |
|
{ |
|
unsigned long maxcount, count; |
|
struct xdr_stream *xdr = &resp->xdr; |
|
struct file *file; |
|
int starting_len = xdr->buf->len; |
|
int last_segment = xdr->buf->len; |
|
int segments = 0; |
|
__be32 *p, tmp; |
|
bool is_data; |
|
loff_t pos; |
|
u32 eof; |
|
|
|
if (nfserr) |
|
return nfserr; |
|
file = read->rd_nf->nf_file; |
|
|
|
/* eof flag, segment count */ |
|
p = xdr_reserve_space(xdr, 4 + 4); |
|
if (!p) |
|
return nfserr_resource; |
|
xdr_commit_encode(xdr); |
|
|
|
maxcount = svc_max_payload(resp->rqstp); |
|
maxcount = min_t(unsigned long, maxcount, |
|
(xdr->buf->buflen - xdr->buf->len)); |
|
maxcount = min_t(unsigned long, maxcount, read->rd_length); |
|
count = maxcount; |
|
|
|
eof = read->rd_offset >= i_size_read(file_inode(file)); |
|
if (eof) |
|
goto out; |
|
|
|
pos = vfs_llseek(file, read->rd_offset, SEEK_HOLE); |
|
is_data = pos > read->rd_offset; |
|
|
|
while (count > 0 && !eof) { |
|
maxcount = count; |
|
if (is_data) |
|
nfserr = nfsd4_encode_read_plus_data(resp, read, &maxcount, &eof, |
|
segments == 0 ? &pos : NULL); |
|
else |
|
nfserr = nfsd4_encode_read_plus_hole(resp, read, &maxcount, &eof); |
|
if (nfserr) |
|
goto out; |
|
count -= maxcount; |
|
read->rd_offset += maxcount; |
|
is_data = !is_data; |
|
last_segment = xdr->buf->len; |
|
segments++; |
|
} |
|
|
|
out: |
|
if (nfserr && segments == 0) |
|
xdr_truncate_encode(xdr, starting_len); |
|
else { |
|
if (nfserr) { |
|
xdr_truncate_encode(xdr, last_segment); |
|
nfserr = nfs_ok; |
|
eof = 0; |
|
} |
|
tmp = htonl(eof); |
|
write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4); |
|
tmp = htonl(segments); |
|
write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); |
|
} |
|
|
|
return nfserr; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_copy_notify *cn) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
if (nfserr) |
|
return nfserr; |
|
|
|
/* 8 sec, 4 nsec */ |
|
p = xdr_reserve_space(xdr, 12); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
/* cnr_lease_time */ |
|
p = xdr_encode_hyper(p, cn->cpn_sec); |
|
*p++ = cpu_to_be32(cn->cpn_nsec); |
|
|
|
/* cnr_stateid */ |
|
nfserr = nfsd4_encode_stateid(xdr, &cn->cpn_cnr_stateid); |
|
if (nfserr) |
|
return nfserr; |
|
|
|
/* cnr_src.nl_nsvr */ |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
*p++ = cpu_to_be32(1); |
|
|
|
return nfsd42_encode_nl4_server(resp, &cn->cpn_src); |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_seek *seek) |
|
{ |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(&resp->xdr, 4 + 8); |
|
*p++ = cpu_to_be32(seek->seek_eof); |
|
p = xdr_encode_hyper(p, seek->seek_pos); |
|
|
|
return 0; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) |
|
{ |
|
return nfserr; |
|
} |
|
|
|
/* |
|
* Encode kmalloc-ed buffer in to XDR stream. |
|
*/ |
|
static __be32 |
|
nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen) |
|
{ |
|
u32 cplen; |
|
__be32 *p; |
|
|
|
cplen = min_t(unsigned long, buflen, |
|
((void *)xdr->end - (void *)xdr->p)); |
|
p = xdr_reserve_space(xdr, cplen); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
memcpy(p, buf, cplen); |
|
buf += cplen; |
|
buflen -= cplen; |
|
|
|
while (buflen) { |
|
cplen = min_t(u32, buflen, PAGE_SIZE); |
|
p = xdr_reserve_space(xdr, cplen); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
memcpy(p, buf, cplen); |
|
|
|
if (cplen < PAGE_SIZE) { |
|
/* |
|
* We're done, with a length that wasn't page |
|
* aligned, so possibly not word aligned. Pad |
|
* any trailing bytes with 0. |
|
*/ |
|
xdr_encode_opaque_fixed(p, NULL, cplen); |
|
break; |
|
} |
|
|
|
buflen -= PAGE_SIZE; |
|
buf += PAGE_SIZE; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_getxattr *getxattr) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p, err; |
|
|
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
*p = cpu_to_be32(getxattr->getxa_len); |
|
|
|
if (getxattr->getxa_len == 0) |
|
return 0; |
|
|
|
err = nfsd4_vbuf_to_stream(xdr, getxattr->getxa_buf, |
|
getxattr->getxa_len); |
|
|
|
kvfree(getxattr->getxa_buf); |
|
|
|
return err; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_setxattr *setxattr) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 20); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
encode_cinfo(p, &setxattr->setxa_cinfo); |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* See if there are cookie values that can be rejected outright. |
|
*/ |
|
static __be32 |
|
nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs, |
|
u32 *offsetp) |
|
{ |
|
u64 cookie = listxattrs->lsxa_cookie; |
|
|
|
/* |
|
* If the cookie is larger than the maximum number we can fit |
|
* in either the buffer we just got back from vfs_listxattr, or, |
|
* XDR-encoded, in the return buffer, it's invalid. |
|
*/ |
|
if (cookie > (listxattrs->lsxa_len) / (XATTR_USER_PREFIX_LEN + 2)) |
|
return nfserr_badcookie; |
|
|
|
if (cookie > (listxattrs->lsxa_maxcount / |
|
(XDR_QUADLEN(XATTR_USER_PREFIX_LEN + 2) + 4))) |
|
return nfserr_badcookie; |
|
|
|
*offsetp = (u32)cookie; |
|
return 0; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_listxattrs *listxattrs) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
u32 cookie_offset, count_offset, eof; |
|
u32 left, xdrleft, slen, count; |
|
u32 xdrlen, offset; |
|
u64 cookie; |
|
char *sp; |
|
__be32 status, tmp; |
|
__be32 *p; |
|
u32 nuser; |
|
|
|
eof = 1; |
|
|
|
status = nfsd4_listxattr_validate_cookie(listxattrs, &offset); |
|
if (status) |
|
goto out; |
|
|
|
/* |
|
* Reserve space for the cookie and the name array count. Record |
|
* the offsets to save them later. |
|
*/ |
|
cookie_offset = xdr->buf->len; |
|
count_offset = cookie_offset + 8; |
|
p = xdr_reserve_space(xdr, 12); |
|
if (!p) { |
|
status = nfserr_resource; |
|
goto out; |
|
} |
|
|
|
count = 0; |
|
left = listxattrs->lsxa_len; |
|
sp = listxattrs->lsxa_buf; |
|
nuser = 0; |
|
|
|
xdrleft = listxattrs->lsxa_maxcount; |
|
|
|
while (left > 0 && xdrleft > 0) { |
|
slen = strlen(sp); |
|
|
|
/* |
|
* Check if this is a "user." attribute, skip it if not. |
|
*/ |
|
if (strncmp(sp, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) |
|
goto contloop; |
|
|
|
slen -= XATTR_USER_PREFIX_LEN; |
|
xdrlen = 4 + ((slen + 3) & ~3); |
|
if (xdrlen > xdrleft) { |
|
if (count == 0) { |
|
/* |
|
* Can't even fit the first attribute name. |
|
*/ |
|
status = nfserr_toosmall; |
|
goto out; |
|
} |
|
eof = 0; |
|
goto wreof; |
|
} |
|
|
|
left -= XATTR_USER_PREFIX_LEN; |
|
sp += XATTR_USER_PREFIX_LEN; |
|
if (nuser++ < offset) |
|
goto contloop; |
|
|
|
|
|
p = xdr_reserve_space(xdr, xdrlen); |
|
if (!p) { |
|
status = nfserr_resource; |
|
goto out; |
|
} |
|
|
|
xdr_encode_opaque(p, sp, slen); |
|
|
|
xdrleft -= xdrlen; |
|
count++; |
|
contloop: |
|
sp += slen + 1; |
|
left -= slen + 1; |
|
} |
|
|
|
/* |
|
* If there were user attributes to copy, but we didn't copy |
|
* any, the offset was too large (e.g. the cookie was invalid). |
|
*/ |
|
if (nuser > 0 && count == 0) { |
|
status = nfserr_badcookie; |
|
goto out; |
|
} |
|
|
|
wreof: |
|
p = xdr_reserve_space(xdr, 4); |
|
if (!p) { |
|
status = nfserr_resource; |
|
goto out; |
|
} |
|
*p = cpu_to_be32(eof); |
|
|
|
cookie = offset + count; |
|
|
|
write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &cookie, 8); |
|
tmp = cpu_to_be32(count); |
|
write_bytes_to_xdr_buf(xdr->buf, count_offset, &tmp, 4); |
|
out: |
|
if (listxattrs->lsxa_len) |
|
kvfree(listxattrs->lsxa_buf); |
|
return status; |
|
} |
|
|
|
static __be32 |
|
nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr, |
|
struct nfsd4_removexattr *removexattr) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 20); |
|
if (!p) |
|
return nfserr_resource; |
|
|
|
p = encode_cinfo(p, &removexattr->rmxa_cinfo); |
|
return 0; |
|
} |
|
|
|
typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); |
|
|
|
/* |
|
* Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 |
|
* since we don't need to filter out obsolete ops as this is |
|
* done in the decoding phase. |
|
*/ |
|
static const nfsd4_enc nfsd4_enc_ops[] = { |
|
[OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, |
|
[OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, |
|
[OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, |
|
[OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, |
|
[OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, |
|
[OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, |
|
[OP_LINK] = (nfsd4_enc)nfsd4_encode_link, |
|
[OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, |
|
[OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, |
|
[OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, |
|
[OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, |
|
[OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, |
|
[OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, |
|
[OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_READ] = (nfsd4_enc)nfsd4_encode_read, |
|
[OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, |
|
[OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, |
|
[OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, |
|
[OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, |
|
[OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, |
|
[OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, |
|
[OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, |
|
[OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, |
|
[OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, |
|
|
|
/* NFSv4.1 operations */ |
|
[OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, |
|
[OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, |
|
[OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, |
|
[OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, |
|
#ifdef CONFIG_NFSD_PNFS |
|
[OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo, |
|
[OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit, |
|
[OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget, |
|
[OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn, |
|
#else |
|
[OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, |
|
#endif |
|
[OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, |
|
[OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, |
|
[OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, |
|
[OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, |
|
|
|
/* NFSv4.2 operations */ |
|
[OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_COPY] = (nfsd4_enc)nfsd4_encode_copy, |
|
[OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_copy_notify, |
|
[OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status, |
|
[OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_read_plus, |
|
[OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek, |
|
[OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop, |
|
[OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop, |
|
|
|
/* RFC 8276 extended atributes operations */ |
|
[OP_GETXATTR] = (nfsd4_enc)nfsd4_encode_getxattr, |
|
[OP_SETXATTR] = (nfsd4_enc)nfsd4_encode_setxattr, |
|
[OP_LISTXATTRS] = (nfsd4_enc)nfsd4_encode_listxattrs, |
|
[OP_REMOVEXATTR] = (nfsd4_enc)nfsd4_encode_removexattr, |
|
}; |
|
|
|
/* |
|
* Calculate whether we still have space to encode repsize bytes. |
|
* There are two considerations: |
|
* - For NFS versions >=4.1, the size of the reply must stay within |
|
* session limits |
|
* - For all NFS versions, we must stay within limited preallocated |
|
* buffer space. |
|
* |
|
* This is called before the operation is processed, so can only provide |
|
* an upper estimate. For some nonidempotent operations (such as |
|
* getattr), it's not necessarily a problem if that estimate is wrong, |
|
* as we can fail it after processing without significant side effects. |
|
*/ |
|
__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize) |
|
{ |
|
struct xdr_buf *buf = &resp->rqstp->rq_res; |
|
struct nfsd4_slot *slot = resp->cstate.slot; |
|
|
|
if (buf->len + respsize <= buf->buflen) |
|
return nfs_ok; |
|
if (!nfsd4_has_session(&resp->cstate)) |
|
return nfserr_resource; |
|
if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) { |
|
WARN_ON_ONCE(1); |
|
return nfserr_rep_too_big_to_cache; |
|
} |
|
return nfserr_rep_too_big; |
|
} |
|
|
|
void |
|
nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) |
|
{ |
|
struct xdr_stream *xdr = &resp->xdr; |
|
struct nfs4_stateowner *so = resp->cstate.replay_owner; |
|
struct svc_rqst *rqstp = resp->rqstp; |
|
const struct nfsd4_operation *opdesc = op->opdesc; |
|
int post_err_offset; |
|
nfsd4_enc encoder; |
|
__be32 *p; |
|
|
|
p = xdr_reserve_space(xdr, 8); |
|
if (!p) { |
|
WARN_ON_ONCE(1); |
|
return; |
|
} |
|
*p++ = cpu_to_be32(op->opnum); |
|
post_err_offset = xdr->buf->len; |
|
|
|
if (op->opnum == OP_ILLEGAL) |
|
goto status; |
|
if (op->status && opdesc && |
|
!(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE)) |
|
goto status; |
|
BUG_ON(op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || |
|
!nfsd4_enc_ops[op->opnum]); |
|
encoder = nfsd4_enc_ops[op->opnum]; |
|
op->status = encoder(resp, op->status, &op->u); |
|
if (op->status) |
|
trace_nfsd_compound_encode_err(rqstp, op->opnum, op->status); |
|
if (opdesc && opdesc->op_release) |
|
opdesc->op_release(&op->u); |
|
xdr_commit_encode(xdr); |
|
|
|
/* nfsd4_check_resp_size guarantees enough room for error status */ |
|
if (!op->status) { |
|
int space_needed = 0; |
|
if (!nfsd4_last_compound_op(rqstp)) |
|
space_needed = COMPOUND_ERR_SLACK_SPACE; |
|
op->status = nfsd4_check_resp_size(resp, space_needed); |
|
} |
|
if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) { |
|
struct nfsd4_slot *slot = resp->cstate.slot; |
|
|
|
if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) |
|
op->status = nfserr_rep_too_big_to_cache; |
|
else |
|
op->status = nfserr_rep_too_big; |
|
} |
|
if (op->status == nfserr_resource || |
|
op->status == nfserr_rep_too_big || |
|
op->status == nfserr_rep_too_big_to_cache) { |
|
/* |
|
* The operation may have already been encoded or |
|
* partially encoded. No op returns anything additional |
|
* in the case of one of these three errors, so we can |
|
* just truncate back to after the status. But it's a |
|
* bug if we had to do this on a non-idempotent op: |
|
*/ |
|
warn_on_nonidempotent_op(op); |
|
xdr_truncate_encode(xdr, post_err_offset); |
|
} |
|
if (so) { |
|
int len = xdr->buf->len - post_err_offset; |
|
|
|
so->so_replay.rp_status = op->status; |
|
so->so_replay.rp_buflen = len; |
|
read_bytes_from_xdr_buf(xdr->buf, post_err_offset, |
|
so->so_replay.rp_buf, len); |
|
} |
|
status: |
|
/* Note that op->status is already in network byte order: */ |
|
write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4); |
|
} |
|
|
|
/* |
|
* Encode the reply stored in the stateowner reply cache |
|
* |
|
* XDR note: do not encode rp->rp_buflen: the buffer contains the |
|
* previously sent already encoded operation. |
|
*/ |
|
void |
|
nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op) |
|
{ |
|
__be32 *p; |
|
struct nfs4_replay *rp = op->replay; |
|
|
|
p = xdr_reserve_space(xdr, 8 + rp->rp_buflen); |
|
if (!p) { |
|
WARN_ON_ONCE(1); |
|
return; |
|
} |
|
*p++ = cpu_to_be32(op->opnum); |
|
*p++ = rp->rp_status; /* already xdr'ed */ |
|
|
|
p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen); |
|
} |
|
|
|
void nfsd4_release_compoundargs(struct svc_rqst *rqstp) |
|
{ |
|
struct nfsd4_compoundargs *args = rqstp->rq_argp; |
|
|
|
if (args->ops != args->iops) { |
|
kfree(args->ops); |
|
args->ops = args->iops; |
|
} |
|
while (args->to_free) { |
|
struct svcxdr_tmpbuf *tb = args->to_free; |
|
args->to_free = tb->next; |
|
kfree(tb); |
|
} |
|
} |
|
|
|
int |
|
nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p) |
|
{ |
|
struct nfsd4_compoundargs *args = rqstp->rq_argp; |
|
|
|
/* svcxdr_tmp_alloc */ |
|
args->to_free = NULL; |
|
|
|
args->xdr = &rqstp->rq_arg_stream; |
|
args->ops = args->iops; |
|
args->rqstp = rqstp; |
|
|
|
return nfsd4_decode_compound(args); |
|
} |
|
|
|
int |
|
nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p) |
|
{ |
|
struct nfsd4_compoundres *resp = rqstp->rq_resp; |
|
struct xdr_buf *buf = resp->xdr.buf; |
|
|
|
WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len + |
|
buf->tail[0].iov_len); |
|
|
|
*p = resp->cstate.status; |
|
|
|
rqstp->rq_next_page = resp->xdr.page_ptr + 1; |
|
|
|
p = resp->tagp; |
|
*p++ = htonl(resp->taglen); |
|
memcpy(p, resp->tag, resp->taglen); |
|
p += XDR_QUADLEN(resp->taglen); |
|
*p++ = htonl(resp->opcnt); |
|
|
|
nfsd4_sequence_done(resp); |
|
return 1; |
|
} |
|
|
|
/* |
|
* Local variables: |
|
* c-basic-offset: 8 |
|
* End: |
|
*/
|
|
|