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1068 lines
26 KiB
1068 lines
26 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
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* linux/fs/nfs/nfs3proc.c |
|
* |
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* Client-side NFSv3 procedures stubs. |
|
* |
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* Copyright (C) 1997, Olaf Kirch |
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*/ |
|
|
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#include <linux/mm.h> |
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#include <linux/errno.h> |
|
#include <linux/string.h> |
|
#include <linux/sunrpc/clnt.h> |
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#include <linux/slab.h> |
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#include <linux/nfs.h> |
|
#include <linux/nfs3.h> |
|
#include <linux/nfs_fs.h> |
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#include <linux/nfs_page.h> |
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#include <linux/lockd/bind.h> |
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#include <linux/nfs_mount.h> |
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#include <linux/freezer.h> |
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#include <linux/xattr.h> |
|
|
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#include "iostat.h" |
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#include "internal.h" |
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#include "nfs3_fs.h" |
|
|
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#define NFSDBG_FACILITY NFSDBG_PROC |
|
|
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/* A wrapper to handle the EJUKEBOX error messages */ |
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static int |
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nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags) |
|
{ |
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int res; |
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do { |
|
res = rpc_call_sync(clnt, msg, flags); |
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if (res != -EJUKEBOX) |
|
break; |
|
freezable_schedule_timeout_killable_unsafe(NFS_JUKEBOX_RETRY_TIME); |
|
res = -ERESTARTSYS; |
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} while (!fatal_signal_pending(current)); |
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return res; |
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} |
|
|
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#define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags) |
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|
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static int |
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nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode) |
|
{ |
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if (task->tk_status != -EJUKEBOX) |
|
return 0; |
|
nfs_inc_stats(inode, NFSIOS_DELAY); |
|
task->tk_status = 0; |
|
rpc_restart_call(task); |
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rpc_delay(task, NFS_JUKEBOX_RETRY_TIME); |
|
return 1; |
|
} |
|
|
|
static int |
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do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle, |
|
struct nfs_fsinfo *info) |
|
{ |
|
struct rpc_message msg = { |
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.rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO], |
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.rpc_argp = fhandle, |
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.rpc_resp = info, |
|
}; |
|
int status; |
|
|
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dprintk("%s: call fsinfo\n", __func__); |
|
nfs_fattr_init(info->fattr); |
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status = rpc_call_sync(client, &msg, 0); |
|
dprintk("%s: reply fsinfo: %d\n", __func__, status); |
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if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) { |
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msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; |
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msg.rpc_resp = info->fattr; |
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status = rpc_call_sync(client, &msg, 0); |
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dprintk("%s: reply getattr: %d\n", __func__, status); |
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} |
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return status; |
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} |
|
|
|
/* |
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* Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb |
|
*/ |
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static int |
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nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
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struct nfs_fsinfo *info) |
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{ |
|
int status; |
|
|
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status = do_proc_get_root(server->client, fhandle, info); |
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if (status && server->nfs_client->cl_rpcclient != server->client) |
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status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info); |
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return status; |
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} |
|
|
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/* |
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* One function for each procedure in the NFS protocol. |
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*/ |
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static int |
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nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, |
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struct nfs_fattr *fattr, struct nfs4_label *label, |
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struct inode *inode) |
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{ |
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struct rpc_message msg = { |
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.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR], |
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.rpc_argp = fhandle, |
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.rpc_resp = fattr, |
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}; |
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int status; |
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unsigned short task_flags = 0; |
|
|
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/* Is this is an attribute revalidation, subject to softreval? */ |
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if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) |
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task_flags |= RPC_TASK_TIMEOUT; |
|
|
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dprintk("NFS call getattr\n"); |
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nfs_fattr_init(fattr); |
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status = rpc_call_sync(server->client, &msg, task_flags); |
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dprintk("NFS reply getattr: %d\n", status); |
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return status; |
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} |
|
|
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static int |
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nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, |
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struct iattr *sattr) |
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{ |
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struct inode *inode = d_inode(dentry); |
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struct nfs3_sattrargs arg = { |
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.fh = NFS_FH(inode), |
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.sattr = sattr, |
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}; |
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struct rpc_message msg = { |
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.rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR], |
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.rpc_argp = &arg, |
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.rpc_resp = fattr, |
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}; |
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int status; |
|
|
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dprintk("NFS call setattr\n"); |
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if (sattr->ia_valid & ATTR_FILE) |
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msg.rpc_cred = nfs_file_cred(sattr->ia_file); |
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nfs_fattr_init(fattr); |
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status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
|
if (status == 0) { |
|
nfs_setattr_update_inode(inode, sattr, fattr); |
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if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) |
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nfs_zap_acl_cache(inode); |
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} |
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dprintk("NFS reply setattr: %d\n", status); |
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return status; |
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} |
|
|
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static int |
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__nfs3_proc_lookup(struct inode *dir, const char *name, size_t len, |
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struct nfs_fh *fhandle, struct nfs_fattr *fattr, |
|
unsigned short task_flags) |
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{ |
|
struct nfs3_diropargs arg = { |
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.fh = NFS_FH(dir), |
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.name = name, |
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.len = len |
|
}; |
|
struct nfs3_diropres res = { |
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.fh = fhandle, |
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.fattr = fattr |
|
}; |
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struct rpc_message msg = { |
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.rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP], |
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.rpc_argp = &arg, |
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.rpc_resp = &res, |
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}; |
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int status; |
|
|
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res.dir_attr = nfs_alloc_fattr(); |
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if (res.dir_attr == NULL) |
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return -ENOMEM; |
|
|
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nfs_fattr_init(fattr); |
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status = rpc_call_sync(NFS_CLIENT(dir), &msg, task_flags); |
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nfs_refresh_inode(dir, res.dir_attr); |
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if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) { |
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msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR]; |
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msg.rpc_argp = fhandle; |
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msg.rpc_resp = fattr; |
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status = rpc_call_sync(NFS_CLIENT(dir), &msg, task_flags); |
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} |
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nfs_free_fattr(res.dir_attr); |
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dprintk("NFS reply lookup: %d\n", status); |
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return status; |
|
} |
|
|
|
static int |
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nfs3_proc_lookup(struct inode *dir, struct dentry *dentry, |
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struct nfs_fh *fhandle, struct nfs_fattr *fattr, |
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struct nfs4_label *label) |
|
{ |
|
unsigned short task_flags = 0; |
|
|
|
/* Is this is an attribute revalidation, subject to softreval? */ |
|
if (nfs_lookup_is_soft_revalidate(dentry)) |
|
task_flags |= RPC_TASK_TIMEOUT; |
|
|
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dprintk("NFS call lookup %pd2\n", dentry); |
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return __nfs3_proc_lookup(dir, dentry->d_name.name, |
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dentry->d_name.len, fhandle, fattr, |
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task_flags); |
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} |
|
|
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static int nfs3_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, |
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struct nfs_fattr *fattr, struct nfs4_label *label) |
|
{ |
|
const char dotdot[] = ".."; |
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const size_t len = strlen(dotdot); |
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unsigned short task_flags = 0; |
|
|
|
if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL) |
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task_flags |= RPC_TASK_TIMEOUT; |
|
|
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return __nfs3_proc_lookup(inode, dotdot, len, fhandle, fattr, |
|
task_flags); |
|
} |
|
|
|
static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry) |
|
{ |
|
struct nfs3_accessargs arg = { |
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.fh = NFS_FH(inode), |
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.access = entry->mask, |
|
}; |
|
struct nfs3_accessres res; |
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struct rpc_message msg = { |
|
.rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS], |
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.rpc_argp = &arg, |
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.rpc_resp = &res, |
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.rpc_cred = entry->cred, |
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}; |
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int status = -ENOMEM; |
|
|
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dprintk("NFS call access\n"); |
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res.fattr = nfs_alloc_fattr(); |
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if (res.fattr == NULL) |
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goto out; |
|
|
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status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
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nfs_refresh_inode(inode, res.fattr); |
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if (status == 0) |
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nfs_access_set_mask(entry, res.access); |
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nfs_free_fattr(res.fattr); |
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out: |
|
dprintk("NFS reply access: %d\n", status); |
|
return status; |
|
} |
|
|
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static int nfs3_proc_readlink(struct inode *inode, struct page *page, |
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unsigned int pgbase, unsigned int pglen) |
|
{ |
|
struct nfs_fattr *fattr; |
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struct nfs3_readlinkargs args = { |
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.fh = NFS_FH(inode), |
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.pgbase = pgbase, |
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.pglen = pglen, |
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.pages = &page |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs3_procedures[NFS3PROC_READLINK], |
|
.rpc_argp = &args, |
|
}; |
|
int status = -ENOMEM; |
|
|
|
dprintk("NFS call readlink\n"); |
|
fattr = nfs_alloc_fattr(); |
|
if (fattr == NULL) |
|
goto out; |
|
msg.rpc_resp = fattr; |
|
|
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status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
|
nfs_refresh_inode(inode, fattr); |
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nfs_free_fattr(fattr); |
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out: |
|
dprintk("NFS reply readlink: %d\n", status); |
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return status; |
|
} |
|
|
|
struct nfs3_createdata { |
|
struct rpc_message msg; |
|
union { |
|
struct nfs3_createargs create; |
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struct nfs3_mkdirargs mkdir; |
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struct nfs3_symlinkargs symlink; |
|
struct nfs3_mknodargs mknod; |
|
} arg; |
|
struct nfs3_diropres res; |
|
struct nfs_fh fh; |
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struct nfs_fattr fattr; |
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struct nfs_fattr dir_attr; |
|
}; |
|
|
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static struct nfs3_createdata *nfs3_alloc_createdata(void) |
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{ |
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struct nfs3_createdata *data; |
|
|
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data = kzalloc(sizeof(*data), GFP_KERNEL); |
|
if (data != NULL) { |
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data->msg.rpc_argp = &data->arg; |
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data->msg.rpc_resp = &data->res; |
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data->res.fh = &data->fh; |
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data->res.fattr = &data->fattr; |
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data->res.dir_attr = &data->dir_attr; |
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nfs_fattr_init(data->res.fattr); |
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nfs_fattr_init(data->res.dir_attr); |
|
} |
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return data; |
|
} |
|
|
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static struct dentry * |
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nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data) |
|
{ |
|
int status; |
|
|
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status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0); |
|
nfs_post_op_update_inode(dir, data->res.dir_attr); |
|
if (status != 0) |
|
return ERR_PTR(status); |
|
|
|
return nfs_add_or_obtain(dentry, data->res.fh, data->res.fattr, NULL); |
|
} |
|
|
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static void nfs3_free_createdata(struct nfs3_createdata *data) |
|
{ |
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kfree(data); |
|
} |
|
|
|
/* |
|
* Create a regular file. |
|
*/ |
|
static int |
|
nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
|
int flags) |
|
{ |
|
struct posix_acl *default_acl, *acl; |
|
struct nfs3_createdata *data; |
|
struct dentry *d_alias; |
|
int status = -ENOMEM; |
|
|
|
dprintk("NFS call create %pd\n", dentry); |
|
|
|
data = nfs3_alloc_createdata(); |
|
if (data == NULL) |
|
goto out; |
|
|
|
data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE]; |
|
data->arg.create.fh = NFS_FH(dir); |
|
data->arg.create.name = dentry->d_name.name; |
|
data->arg.create.len = dentry->d_name.len; |
|
data->arg.create.sattr = sattr; |
|
|
|
data->arg.create.createmode = NFS3_CREATE_UNCHECKED; |
|
if (flags & O_EXCL) { |
|
data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE; |
|
data->arg.create.verifier[0] = cpu_to_be32(jiffies); |
|
data->arg.create.verifier[1] = cpu_to_be32(current->pid); |
|
} |
|
|
|
status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl); |
|
if (status) |
|
goto out; |
|
|
|
for (;;) { |
|
d_alias = nfs3_do_create(dir, dentry, data); |
|
status = PTR_ERR_OR_ZERO(d_alias); |
|
|
|
if (status != -ENOTSUPP) |
|
break; |
|
/* If the server doesn't support the exclusive creation |
|
* semantics, try again with simple 'guarded' mode. */ |
|
switch (data->arg.create.createmode) { |
|
case NFS3_CREATE_EXCLUSIVE: |
|
data->arg.create.createmode = NFS3_CREATE_GUARDED; |
|
break; |
|
|
|
case NFS3_CREATE_GUARDED: |
|
data->arg.create.createmode = NFS3_CREATE_UNCHECKED; |
|
break; |
|
|
|
case NFS3_CREATE_UNCHECKED: |
|
goto out_release_acls; |
|
} |
|
nfs_fattr_init(data->res.dir_attr); |
|
nfs_fattr_init(data->res.fattr); |
|
} |
|
|
|
if (status != 0) |
|
goto out_release_acls; |
|
|
|
if (d_alias) |
|
dentry = d_alias; |
|
|
|
/* When we created the file with exclusive semantics, make |
|
* sure we set the attributes afterwards. */ |
|
if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) { |
|
dprintk("NFS call setattr (post-create)\n"); |
|
|
|
if (!(sattr->ia_valid & ATTR_ATIME_SET)) |
|
sattr->ia_valid |= ATTR_ATIME; |
|
if (!(sattr->ia_valid & ATTR_MTIME_SET)) |
|
sattr->ia_valid |= ATTR_MTIME; |
|
|
|
/* Note: we could use a guarded setattr here, but I'm |
|
* not sure this buys us anything (and I'd have |
|
* to revamp the NFSv3 XDR code) */ |
|
status = nfs3_proc_setattr(dentry, data->res.fattr, sattr); |
|
nfs_post_op_update_inode(d_inode(dentry), data->res.fattr); |
|
dprintk("NFS reply setattr (post-create): %d\n", status); |
|
if (status != 0) |
|
goto out_dput; |
|
} |
|
|
|
status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl); |
|
|
|
out_dput: |
|
dput(d_alias); |
|
out_release_acls: |
|
posix_acl_release(acl); |
|
posix_acl_release(default_acl); |
|
out: |
|
nfs3_free_createdata(data); |
|
dprintk("NFS reply create: %d\n", status); |
|
return status; |
|
} |
|
|
|
static int |
|
nfs3_proc_remove(struct inode *dir, struct dentry *dentry) |
|
{ |
|
struct nfs_removeargs arg = { |
|
.fh = NFS_FH(dir), |
|
.name = dentry->d_name, |
|
}; |
|
struct nfs_removeres res; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE], |
|
.rpc_argp = &arg, |
|
.rpc_resp = &res, |
|
}; |
|
int status = -ENOMEM; |
|
|
|
dprintk("NFS call remove %pd2\n", dentry); |
|
res.dir_attr = nfs_alloc_fattr(); |
|
if (res.dir_attr == NULL) |
|
goto out; |
|
|
|
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
|
nfs_post_op_update_inode(dir, res.dir_attr); |
|
nfs_free_fattr(res.dir_attr); |
|
out: |
|
dprintk("NFS reply remove: %d\n", status); |
|
return status; |
|
} |
|
|
|
static void |
|
nfs3_proc_unlink_setup(struct rpc_message *msg, |
|
struct dentry *dentry, |
|
struct inode *inode) |
|
{ |
|
msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE]; |
|
} |
|
|
|
static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) |
|
{ |
|
rpc_call_start(task); |
|
} |
|
|
|
static int |
|
nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
|
{ |
|
struct nfs_removeres *res; |
|
if (nfs3_async_handle_jukebox(task, dir)) |
|
return 0; |
|
res = task->tk_msg.rpc_resp; |
|
nfs_post_op_update_inode(dir, res->dir_attr); |
|
return 1; |
|
} |
|
|
|
static void |
|
nfs3_proc_rename_setup(struct rpc_message *msg, |
|
struct dentry *old_dentry, |
|
struct dentry *new_dentry) |
|
{ |
|
msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME]; |
|
} |
|
|
|
static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) |
|
{ |
|
rpc_call_start(task); |
|
} |
|
|
|
static int |
|
nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir, |
|
struct inode *new_dir) |
|
{ |
|
struct nfs_renameres *res; |
|
|
|
if (nfs3_async_handle_jukebox(task, old_dir)) |
|
return 0; |
|
res = task->tk_msg.rpc_resp; |
|
|
|
nfs_post_op_update_inode(old_dir, res->old_fattr); |
|
nfs_post_op_update_inode(new_dir, res->new_fattr); |
|
return 1; |
|
} |
|
|
|
static int |
|
nfs3_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) |
|
{ |
|
struct nfs3_linkargs arg = { |
|
.fromfh = NFS_FH(inode), |
|
.tofh = NFS_FH(dir), |
|
.toname = name->name, |
|
.tolen = name->len |
|
}; |
|
struct nfs3_linkres res; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs3_procedures[NFS3PROC_LINK], |
|
.rpc_argp = &arg, |
|
.rpc_resp = &res, |
|
}; |
|
int status = -ENOMEM; |
|
|
|
dprintk("NFS call link %s\n", name->name); |
|
res.fattr = nfs_alloc_fattr(); |
|
res.dir_attr = nfs_alloc_fattr(); |
|
if (res.fattr == NULL || res.dir_attr == NULL) |
|
goto out; |
|
|
|
status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
|
nfs_post_op_update_inode(dir, res.dir_attr); |
|
nfs_post_op_update_inode(inode, res.fattr); |
|
out: |
|
nfs_free_fattr(res.dir_attr); |
|
nfs_free_fattr(res.fattr); |
|
dprintk("NFS reply link: %d\n", status); |
|
return status; |
|
} |
|
|
|
static int |
|
nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, |
|
unsigned int len, struct iattr *sattr) |
|
{ |
|
struct nfs3_createdata *data; |
|
struct dentry *d_alias; |
|
int status = -ENOMEM; |
|
|
|
if (len > NFS3_MAXPATHLEN) |
|
return -ENAMETOOLONG; |
|
|
|
dprintk("NFS call symlink %pd\n", dentry); |
|
|
|
data = nfs3_alloc_createdata(); |
|
if (data == NULL) |
|
goto out; |
|
data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK]; |
|
data->arg.symlink.fromfh = NFS_FH(dir); |
|
data->arg.symlink.fromname = dentry->d_name.name; |
|
data->arg.symlink.fromlen = dentry->d_name.len; |
|
data->arg.symlink.pages = &page; |
|
data->arg.symlink.pathlen = len; |
|
data->arg.symlink.sattr = sattr; |
|
|
|
d_alias = nfs3_do_create(dir, dentry, data); |
|
status = PTR_ERR_OR_ZERO(d_alias); |
|
|
|
if (status == 0) |
|
dput(d_alias); |
|
|
|
nfs3_free_createdata(data); |
|
out: |
|
dprintk("NFS reply symlink: %d\n", status); |
|
return status; |
|
} |
|
|
|
static int |
|
nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) |
|
{ |
|
struct posix_acl *default_acl, *acl; |
|
struct nfs3_createdata *data; |
|
struct dentry *d_alias; |
|
int status = -ENOMEM; |
|
|
|
dprintk("NFS call mkdir %pd\n", dentry); |
|
|
|
data = nfs3_alloc_createdata(); |
|
if (data == NULL) |
|
goto out; |
|
|
|
status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl); |
|
if (status) |
|
goto out; |
|
|
|
data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR]; |
|
data->arg.mkdir.fh = NFS_FH(dir); |
|
data->arg.mkdir.name = dentry->d_name.name; |
|
data->arg.mkdir.len = dentry->d_name.len; |
|
data->arg.mkdir.sattr = sattr; |
|
|
|
d_alias = nfs3_do_create(dir, dentry, data); |
|
status = PTR_ERR_OR_ZERO(d_alias); |
|
|
|
if (status != 0) |
|
goto out_release_acls; |
|
|
|
if (d_alias) |
|
dentry = d_alias; |
|
|
|
status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl); |
|
|
|
dput(d_alias); |
|
out_release_acls: |
|
posix_acl_release(acl); |
|
posix_acl_release(default_acl); |
|
out: |
|
nfs3_free_createdata(data); |
|
dprintk("NFS reply mkdir: %d\n", status); |
|
return status; |
|
} |
|
|
|
static int |
|
nfs3_proc_rmdir(struct inode *dir, const struct qstr *name) |
|
{ |
|
struct nfs_fattr *dir_attr; |
|
struct nfs3_diropargs arg = { |
|
.fh = NFS_FH(dir), |
|
.name = name->name, |
|
.len = name->len |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR], |
|
.rpc_argp = &arg, |
|
}; |
|
int status = -ENOMEM; |
|
|
|
dprintk("NFS call rmdir %s\n", name->name); |
|
dir_attr = nfs_alloc_fattr(); |
|
if (dir_attr == NULL) |
|
goto out; |
|
|
|
msg.rpc_resp = dir_attr; |
|
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
|
nfs_post_op_update_inode(dir, dir_attr); |
|
nfs_free_fattr(dir_attr); |
|
out: |
|
dprintk("NFS reply rmdir: %d\n", status); |
|
return status; |
|
} |
|
|
|
/* |
|
* The READDIR implementation is somewhat hackish - we pass the user buffer |
|
* to the encode function, which installs it in the receive iovec. |
|
* The decode function itself doesn't perform any decoding, it just makes |
|
* sure the reply is syntactically correct. |
|
* |
|
* Also note that this implementation handles both plain readdir and |
|
* readdirplus. |
|
*/ |
|
static int nfs3_proc_readdir(struct nfs_readdir_arg *nr_arg, |
|
struct nfs_readdir_res *nr_res) |
|
{ |
|
struct inode *dir = d_inode(nr_arg->dentry); |
|
struct nfs3_readdirargs arg = { |
|
.fh = NFS_FH(dir), |
|
.cookie = nr_arg->cookie, |
|
.plus = nr_arg->plus, |
|
.count = nr_arg->page_len, |
|
.pages = nr_arg->pages |
|
}; |
|
struct nfs3_readdirres res = { |
|
.verf = nr_res->verf, |
|
.plus = nr_arg->plus, |
|
}; |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs3_procedures[NFS3PROC_READDIR], |
|
.rpc_argp = &arg, |
|
.rpc_resp = &res, |
|
.rpc_cred = nr_arg->cred, |
|
}; |
|
int status = -ENOMEM; |
|
|
|
if (nr_arg->plus) |
|
msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS]; |
|
if (arg.cookie) |
|
memcpy(arg.verf, nr_arg->verf, sizeof(arg.verf)); |
|
|
|
dprintk("NFS call readdir%s %llu\n", nr_arg->plus ? "plus" : "", |
|
(unsigned long long)nr_arg->cookie); |
|
|
|
res.dir_attr = nfs_alloc_fattr(); |
|
if (res.dir_attr == NULL) |
|
goto out; |
|
|
|
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); |
|
|
|
nfs_invalidate_atime(dir); |
|
nfs_refresh_inode(dir, res.dir_attr); |
|
|
|
nfs_free_fattr(res.dir_attr); |
|
out: |
|
dprintk("NFS reply readdir%s: %d\n", nr_arg->plus ? "plus" : "", |
|
status); |
|
return status; |
|
} |
|
|
|
static int |
|
nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, |
|
dev_t rdev) |
|
{ |
|
struct posix_acl *default_acl, *acl; |
|
struct nfs3_createdata *data; |
|
struct dentry *d_alias; |
|
int status = -ENOMEM; |
|
|
|
dprintk("NFS call mknod %pd %u:%u\n", dentry, |
|
MAJOR(rdev), MINOR(rdev)); |
|
|
|
data = nfs3_alloc_createdata(); |
|
if (data == NULL) |
|
goto out; |
|
|
|
status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl); |
|
if (status) |
|
goto out; |
|
|
|
data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD]; |
|
data->arg.mknod.fh = NFS_FH(dir); |
|
data->arg.mknod.name = dentry->d_name.name; |
|
data->arg.mknod.len = dentry->d_name.len; |
|
data->arg.mknod.sattr = sattr; |
|
data->arg.mknod.rdev = rdev; |
|
|
|
switch (sattr->ia_mode & S_IFMT) { |
|
case S_IFBLK: |
|
data->arg.mknod.type = NF3BLK; |
|
break; |
|
case S_IFCHR: |
|
data->arg.mknod.type = NF3CHR; |
|
break; |
|
case S_IFIFO: |
|
data->arg.mknod.type = NF3FIFO; |
|
break; |
|
case S_IFSOCK: |
|
data->arg.mknod.type = NF3SOCK; |
|
break; |
|
default: |
|
status = -EINVAL; |
|
goto out_release_acls; |
|
} |
|
|
|
d_alias = nfs3_do_create(dir, dentry, data); |
|
status = PTR_ERR_OR_ZERO(d_alias); |
|
if (status != 0) |
|
goto out_release_acls; |
|
|
|
if (d_alias) |
|
dentry = d_alias; |
|
|
|
status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl); |
|
|
|
dput(d_alias); |
|
out_release_acls: |
|
posix_acl_release(acl); |
|
posix_acl_release(default_acl); |
|
out: |
|
nfs3_free_createdata(data); |
|
dprintk("NFS reply mknod: %d\n", status); |
|
return status; |
|
} |
|
|
|
static int |
|
nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, |
|
struct nfs_fsstat *stat) |
|
{ |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT], |
|
.rpc_argp = fhandle, |
|
.rpc_resp = stat, |
|
}; |
|
int status; |
|
|
|
dprintk("NFS call fsstat\n"); |
|
nfs_fattr_init(stat->fattr); |
|
status = rpc_call_sync(server->client, &msg, 0); |
|
dprintk("NFS reply fsstat: %d\n", status); |
|
return status; |
|
} |
|
|
|
static int |
|
do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle, |
|
struct nfs_fsinfo *info) |
|
{ |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO], |
|
.rpc_argp = fhandle, |
|
.rpc_resp = info, |
|
}; |
|
int status; |
|
|
|
dprintk("NFS call fsinfo\n"); |
|
nfs_fattr_init(info->fattr); |
|
status = rpc_call_sync(client, &msg, 0); |
|
dprintk("NFS reply fsinfo: %d\n", status); |
|
return status; |
|
} |
|
|
|
/* |
|
* Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via |
|
* nfs_create_server |
|
*/ |
|
static int |
|
nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, |
|
struct nfs_fsinfo *info) |
|
{ |
|
int status; |
|
|
|
status = do_proc_fsinfo(server->client, fhandle, info); |
|
if (status && server->nfs_client->cl_rpcclient != server->client) |
|
status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info); |
|
return status; |
|
} |
|
|
|
static int |
|
nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, |
|
struct nfs_pathconf *info) |
|
{ |
|
struct rpc_message msg = { |
|
.rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF], |
|
.rpc_argp = fhandle, |
|
.rpc_resp = info, |
|
}; |
|
int status; |
|
|
|
dprintk("NFS call pathconf\n"); |
|
nfs_fattr_init(info->fattr); |
|
status = rpc_call_sync(server->client, &msg, 0); |
|
dprintk("NFS reply pathconf: %d\n", status); |
|
return status; |
|
} |
|
|
|
static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) |
|
{ |
|
struct inode *inode = hdr->inode; |
|
struct nfs_server *server = NFS_SERVER(inode); |
|
|
|
if (hdr->pgio_done_cb != NULL) |
|
return hdr->pgio_done_cb(task, hdr); |
|
|
|
if (nfs3_async_handle_jukebox(task, inode)) |
|
return -EAGAIN; |
|
|
|
if (task->tk_status >= 0 && !server->read_hdrsize) |
|
cmpxchg(&server->read_hdrsize, 0, hdr->res.replen); |
|
|
|
nfs_invalidate_atime(inode); |
|
nfs_refresh_inode(inode, &hdr->fattr); |
|
return 0; |
|
} |
|
|
|
static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr, |
|
struct rpc_message *msg) |
|
{ |
|
msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ]; |
|
hdr->args.replen = NFS_SERVER(hdr->inode)->read_hdrsize; |
|
} |
|
|
|
static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task, |
|
struct nfs_pgio_header *hdr) |
|
{ |
|
rpc_call_start(task); |
|
return 0; |
|
} |
|
|
|
static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) |
|
{ |
|
struct inode *inode = hdr->inode; |
|
|
|
if (hdr->pgio_done_cb != NULL) |
|
return hdr->pgio_done_cb(task, hdr); |
|
|
|
if (nfs3_async_handle_jukebox(task, inode)) |
|
return -EAGAIN; |
|
if (task->tk_status >= 0) |
|
nfs_writeback_update_inode(hdr); |
|
return 0; |
|
} |
|
|
|
static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr, |
|
struct rpc_message *msg, |
|
struct rpc_clnt **clnt) |
|
{ |
|
msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE]; |
|
} |
|
|
|
static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) |
|
{ |
|
rpc_call_start(task); |
|
} |
|
|
|
static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data) |
|
{ |
|
if (data->commit_done_cb != NULL) |
|
return data->commit_done_cb(task, data); |
|
|
|
if (nfs3_async_handle_jukebox(task, data->inode)) |
|
return -EAGAIN; |
|
nfs_refresh_inode(data->inode, data->res.fattr); |
|
return 0; |
|
} |
|
|
|
static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, |
|
struct rpc_clnt **clnt) |
|
{ |
|
msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT]; |
|
} |
|
|
|
static void nfs3_nlm_alloc_call(void *data) |
|
{ |
|
struct nfs_lock_context *l_ctx = data; |
|
if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) { |
|
get_nfs_open_context(l_ctx->open_context); |
|
nfs_get_lock_context(l_ctx->open_context); |
|
} |
|
} |
|
|
|
static bool nfs3_nlm_unlock_prepare(struct rpc_task *task, void *data) |
|
{ |
|
struct nfs_lock_context *l_ctx = data; |
|
if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) |
|
return nfs_async_iocounter_wait(task, l_ctx); |
|
return false; |
|
|
|
} |
|
|
|
static void nfs3_nlm_release_call(void *data) |
|
{ |
|
struct nfs_lock_context *l_ctx = data; |
|
struct nfs_open_context *ctx; |
|
if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) { |
|
ctx = l_ctx->open_context; |
|
nfs_put_lock_context(l_ctx); |
|
put_nfs_open_context(ctx); |
|
} |
|
} |
|
|
|
static const struct nlmclnt_operations nlmclnt_fl_close_lock_ops = { |
|
.nlmclnt_alloc_call = nfs3_nlm_alloc_call, |
|
.nlmclnt_unlock_prepare = nfs3_nlm_unlock_prepare, |
|
.nlmclnt_release_call = nfs3_nlm_release_call, |
|
}; |
|
|
|
static int |
|
nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl) |
|
{ |
|
struct inode *inode = file_inode(filp); |
|
struct nfs_lock_context *l_ctx = NULL; |
|
struct nfs_open_context *ctx = nfs_file_open_context(filp); |
|
int status; |
|
|
|
if (fl->fl_flags & FL_CLOSE) { |
|
l_ctx = nfs_get_lock_context(ctx); |
|
if (IS_ERR(l_ctx)) |
|
l_ctx = NULL; |
|
else |
|
set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); |
|
} |
|
|
|
status = nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl, l_ctx); |
|
|
|
if (l_ctx) |
|
nfs_put_lock_context(l_ctx); |
|
|
|
return status; |
|
} |
|
|
|
static int nfs3_have_delegation(struct inode *inode, fmode_t flags) |
|
{ |
|
return 0; |
|
} |
|
|
|
static const struct inode_operations nfs3_dir_inode_operations = { |
|
.create = nfs_create, |
|
.lookup = nfs_lookup, |
|
.link = nfs_link, |
|
.unlink = nfs_unlink, |
|
.symlink = nfs_symlink, |
|
.mkdir = nfs_mkdir, |
|
.rmdir = nfs_rmdir, |
|
.mknod = nfs_mknod, |
|
.rename = nfs_rename, |
|
.permission = nfs_permission, |
|
.getattr = nfs_getattr, |
|
.setattr = nfs_setattr, |
|
#ifdef CONFIG_NFS_V3_ACL |
|
.listxattr = nfs3_listxattr, |
|
.get_acl = nfs3_get_acl, |
|
.set_acl = nfs3_set_acl, |
|
#endif |
|
}; |
|
|
|
static const struct inode_operations nfs3_file_inode_operations = { |
|
.permission = nfs_permission, |
|
.getattr = nfs_getattr, |
|
.setattr = nfs_setattr, |
|
#ifdef CONFIG_NFS_V3_ACL |
|
.listxattr = nfs3_listxattr, |
|
.get_acl = nfs3_get_acl, |
|
.set_acl = nfs3_set_acl, |
|
#endif |
|
}; |
|
|
|
const struct nfs_rpc_ops nfs_v3_clientops = { |
|
.version = 3, /* protocol version */ |
|
.dentry_ops = &nfs_dentry_operations, |
|
.dir_inode_ops = &nfs3_dir_inode_operations, |
|
.file_inode_ops = &nfs3_file_inode_operations, |
|
.file_ops = &nfs_file_operations, |
|
.nlmclnt_ops = &nlmclnt_fl_close_lock_ops, |
|
.getroot = nfs3_proc_get_root, |
|
.submount = nfs_submount, |
|
.try_get_tree = nfs_try_get_tree, |
|
.getattr = nfs3_proc_getattr, |
|
.setattr = nfs3_proc_setattr, |
|
.lookup = nfs3_proc_lookup, |
|
.lookupp = nfs3_proc_lookupp, |
|
.access = nfs3_proc_access, |
|
.readlink = nfs3_proc_readlink, |
|
.create = nfs3_proc_create, |
|
.remove = nfs3_proc_remove, |
|
.unlink_setup = nfs3_proc_unlink_setup, |
|
.unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare, |
|
.unlink_done = nfs3_proc_unlink_done, |
|
.rename_setup = nfs3_proc_rename_setup, |
|
.rename_rpc_prepare = nfs3_proc_rename_rpc_prepare, |
|
.rename_done = nfs3_proc_rename_done, |
|
.link = nfs3_proc_link, |
|
.symlink = nfs3_proc_symlink, |
|
.mkdir = nfs3_proc_mkdir, |
|
.rmdir = nfs3_proc_rmdir, |
|
.readdir = nfs3_proc_readdir, |
|
.mknod = nfs3_proc_mknod, |
|
.statfs = nfs3_proc_statfs, |
|
.fsinfo = nfs3_proc_fsinfo, |
|
.pathconf = nfs3_proc_pathconf, |
|
.decode_dirent = nfs3_decode_dirent, |
|
.pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare, |
|
.read_setup = nfs3_proc_read_setup, |
|
.read_done = nfs3_read_done, |
|
.write_setup = nfs3_proc_write_setup, |
|
.write_done = nfs3_write_done, |
|
.commit_setup = nfs3_proc_commit_setup, |
|
.commit_rpc_prepare = nfs3_proc_commit_rpc_prepare, |
|
.commit_done = nfs3_commit_done, |
|
.lock = nfs3_proc_lock, |
|
.clear_acl_cache = forget_all_cached_acls, |
|
.close_context = nfs_close_context, |
|
.have_delegation = nfs3_have_delegation, |
|
.alloc_client = nfs_alloc_client, |
|
.init_client = nfs_init_client, |
|
.free_client = nfs_free_client, |
|
.create_server = nfs3_create_server, |
|
.clone_server = nfs3_clone_server, |
|
};
|
|
|