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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-25 05:34:00 +08:00
linux-next/fs/nfs/nfs3proc.c
Linus Torvalds be0c5d8c0b NFS client updates for Linux 3.11
Feature highlights include:
 - Add basic client support for NFSv4.2
 - Add basic client support for Labeled NFS (selinux for NFSv4.2)
 - Fix the use of credentials in NFSv4.1 stateful operations, and
   add support for NFSv4.1 state protection.
 
 Bugfix highlights:
 - Fix another NFSv4 open state recovery race
 - Fix an NFSv4.1 back channel session regression
 - Various rpc_pipefs races
 - Fix another issue with NFSv3 auth negotiation
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Merge tag 'nfs-for-3.11-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client updates from Trond Myklebust:
 "Feature highlights include:
   - Add basic client support for NFSv4.2
   - Add basic client support for Labeled NFS (selinux for NFSv4.2)
   - Fix the use of credentials in NFSv4.1 stateful operations, and add
     support for NFSv4.1 state protection.

  Bugfix highlights:
   - Fix another NFSv4 open state recovery race
   - Fix an NFSv4.1 back channel session regression
   - Various rpc_pipefs races
   - Fix another issue with NFSv3 auth negotiation

  Please note that Labeled NFS does require some additional support from
  the security subsystem.  The relevant changesets have all been
  reviewed and acked by James Morris."

* tag 'nfs-for-3.11-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (54 commits)
  NFS: Set NFS_CS_MIGRATION for NFSv4 mounts
  NFSv4.1 Refactor nfs4_init_session and nfs4_init_channel_attrs
  nfs: have NFSv3 try server-specified auth flavors in turn
  nfs: have nfs_mount fake up a auth_flavs list when the server didn't provide it
  nfs: move server_authlist into nfs_try_mount_request
  nfs: refactor "need_mount" code out of nfs_try_mount
  SUNRPC: PipeFS MOUNT notification optimization for dying clients
  SUNRPC: split client creation routine into setup and registration
  SUNRPC: fix races on PipeFS UMOUNT notifications
  SUNRPC: fix races on PipeFS MOUNT notifications
  NFSv4.1 use pnfs_device maxcount for the objectlayout gdia_maxcount
  NFSv4.1 use pnfs_device maxcount for the blocklayout gdia_maxcount
  NFSv4.1 Fix gdia_maxcount calculation to fit in ca_maxresponsesize
  NFS: Improve legacy idmapping fallback
  NFSv4.1 end back channel session draining
  NFS: Apply v4.1 capabilities to v4.2
  NFSv4.1: Clean up layout segment comparison helper names
  NFSv4.1: layout segment comparison helpers should take 'const' parameters
  NFSv4: Move the DNS resolver into the NFSv4 module
  rpc_pipefs: only set rpc_dentry_ops if d_op isn't already set
  ...
2013-07-09 12:09:43 -07:00

976 lines
24 KiB
C

/*
* linux/fs/nfs/nfs3proc.c
*
* Client-side NFSv3 procedures stubs.
*
* Copyright (C) 1997, Olaf Kirch
*/
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/sunrpc/clnt.h>
#include <linux/slab.h>
#include <linux/nfs.h>
#include <linux/nfs3.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_page.h>
#include <linux/lockd/bind.h>
#include <linux/nfs_mount.h>
#include <linux/freezer.h>
#include "iostat.h"
#include "internal.h"
#define NFSDBG_FACILITY NFSDBG_PROC
/* A wrapper to handle the EJUKEBOX error messages */
static int
nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
{
int res;
do {
res = rpc_call_sync(clnt, msg, flags);
if (res != -EJUKEBOX)
break;
freezable_schedule_timeout_killable_unsafe(NFS_JUKEBOX_RETRY_TIME);
res = -ERESTARTSYS;
} while (!fatal_signal_pending(current));
return res;
}
#define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
static int
nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
{
if (task->tk_status != -EJUKEBOX)
return 0;
if (task->tk_status == -EJUKEBOX)
nfs_inc_stats(inode, NFSIOS_DELAY);
task->tk_status = 0;
rpc_restart_call(task);
rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
return 1;
}
static int
do_proc_get_root(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("%s: call fsinfo\n", __func__);
nfs_fattr_init(info->fattr);
status = rpc_call_sync(client, &msg, 0);
dprintk("%s: reply fsinfo: %d\n", __func__, status);
if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) {
msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
msg.rpc_resp = info->fattr;
status = rpc_call_sync(client, &msg, 0);
dprintk("%s: reply getattr: %d\n", __func__, status);
}
return status;
}
/*
* Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
*/
static int
nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_fsinfo *info)
{
int status;
status = do_proc_get_root(server->client, fhandle, info);
if (status && server->nfs_client->cl_rpcclient != server->client)
status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
return status;
}
/*
* One function for each procedure in the NFS protocol.
*/
static int
nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
struct nfs_fattr *fattr, struct nfs4_label *label)
{
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR],
.rpc_argp = fhandle,
.rpc_resp = fattr,
};
int status;
dprintk("NFS call getattr\n");
nfs_fattr_init(fattr);
status = rpc_call_sync(server->client, &msg, 0);
dprintk("NFS reply getattr: %d\n", status);
return status;
}
static int
nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
struct iattr *sattr)
{
struct inode *inode = dentry->d_inode;
struct nfs3_sattrargs arg = {
.fh = NFS_FH(inode),
.sattr = sattr,
};
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR],
.rpc_argp = &arg,
.rpc_resp = fattr,
};
int status;
dprintk("NFS call setattr\n");
if (sattr->ia_valid & ATTR_FILE)
msg.rpc_cred = nfs_file_cred(sattr->ia_file);
nfs_fattr_init(fattr);
status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
if (status == 0)
nfs_setattr_update_inode(inode, sattr);
dprintk("NFS reply setattr: %d\n", status);
return status;
}
static int
nfs3_proc_lookup(struct inode *dir, struct qstr *name,
struct nfs_fh *fhandle, struct nfs_fattr *fattr,
struct nfs4_label *label)
{
struct nfs3_diropargs arg = {
.fh = NFS_FH(dir),
.name = name->name,
.len = name->len
};
struct nfs3_diropres res = {
.fh = fhandle,
.fattr = fattr
};
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP],
.rpc_argp = &arg,
.rpc_resp = &res,
};
int status;
dprintk("NFS call lookup %s\n", name->name);
res.dir_attr = nfs_alloc_fattr();
if (res.dir_attr == NULL)
return -ENOMEM;
nfs_fattr_init(fattr);
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
nfs_refresh_inode(dir, res.dir_attr);
if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
msg.rpc_argp = fhandle;
msg.rpc_resp = fattr;
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
}
nfs_free_fattr(res.dir_attr);
dprintk("NFS reply lookup: %d\n", status);
return status;
}
static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
{
struct nfs3_accessargs arg = {
.fh = NFS_FH(inode),
};
struct nfs3_accessres res;
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS],
.rpc_argp = &arg,
.rpc_resp = &res,
.rpc_cred = entry->cred,
};
int mode = entry->mask;
int status = -ENOMEM;
dprintk("NFS call access\n");
if (mode & MAY_READ)
arg.access |= NFS3_ACCESS_READ;
if (S_ISDIR(inode->i_mode)) {
if (mode & MAY_WRITE)
arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
if (mode & MAY_EXEC)
arg.access |= NFS3_ACCESS_LOOKUP;
} else {
if (mode & MAY_WRITE)
arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
if (mode & MAY_EXEC)
arg.access |= NFS3_ACCESS_EXECUTE;
}
res.fattr = nfs_alloc_fattr();
if (res.fattr == NULL)
goto out;
status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
nfs_refresh_inode(inode, res.fattr);
if (status == 0) {
entry->mask = 0;
if (res.access & NFS3_ACCESS_READ)
entry->mask |= MAY_READ;
if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
entry->mask |= MAY_WRITE;
if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
entry->mask |= MAY_EXEC;
}
nfs_free_fattr(res.fattr);
out:
dprintk("NFS reply access: %d\n", status);
return status;
}
static int nfs3_proc_readlink(struct inode *inode, struct page *page,
unsigned int pgbase, unsigned int pglen)
{
struct nfs_fattr *fattr;
struct nfs3_readlinkargs args = {
.fh = NFS_FH(inode),
.pgbase = pgbase,
.pglen = pglen,
.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;
status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
nfs_refresh_inode(inode, fattr);
nfs_free_fattr(fattr);
out:
dprintk("NFS reply readlink: %d\n", status);
return status;
}
struct nfs3_createdata {
struct rpc_message msg;
union {
struct nfs3_createargs create;
struct nfs3_mkdirargs mkdir;
struct nfs3_symlinkargs symlink;
struct nfs3_mknodargs mknod;
} arg;
struct nfs3_diropres res;
struct nfs_fh fh;
struct nfs_fattr fattr;
struct nfs_fattr dir_attr;
};
static struct nfs3_createdata *nfs3_alloc_createdata(void)
{
struct nfs3_createdata *data;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (data != NULL) {
data->msg.rpc_argp = &data->arg;
data->msg.rpc_resp = &data->res;
data->res.fh = &data->fh;
data->res.fattr = &data->fattr;
data->res.dir_attr = &data->dir_attr;
nfs_fattr_init(data->res.fattr);
nfs_fattr_init(data->res.dir_attr);
}
return data;
}
static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
{
int status;
status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
nfs_post_op_update_inode(dir, data->res.dir_attr);
if (status == 0)
status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
return status;
}
static void nfs3_free_createdata(struct nfs3_createdata *data)
{
kfree(data);
}
/*
* Create a regular file.
*/
static int
nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
int flags)
{
struct nfs3_createdata *data;
umode_t mode = sattr->ia_mode;
int status = -ENOMEM;
dprintk("NFS call create %s\n", dentry->d_name.name);
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] = jiffies;
data->arg.create.verifier[1] = current->pid;
}
sattr->ia_mode &= ~current_umask();
for (;;) {
status = nfs3_do_create(dir, dentry, data);
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;
}
nfs_fattr_init(data->res.dir_attr);
nfs_fattr_init(data->res.fattr);
}
if (status != 0)
goto out;
/* 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(dentry->d_inode, data->res.fattr);
dprintk("NFS reply setattr (post-create): %d\n", status);
if (status != 0)
goto out;
}
status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
out:
nfs3_free_createdata(data);
dprintk("NFS reply create: %d\n", status);
return status;
}
static int
nfs3_proc_remove(struct inode *dir, struct qstr *name)
{
struct nfs_removeargs arg = {
.fh = NFS_FH(dir),
.name = *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 %s\n", name->name);
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 inode *dir)
{
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 inode *dir)
{
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_rename(struct inode *old_dir, struct qstr *old_name,
struct inode *new_dir, struct qstr *new_name)
{
struct nfs_renameargs arg = {
.old_dir = NFS_FH(old_dir),
.old_name = old_name,
.new_dir = NFS_FH(new_dir),
.new_name = new_name,
};
struct nfs_renameres res;
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_RENAME],
.rpc_argp = &arg,
.rpc_resp = &res,
};
int status = -ENOMEM;
dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name);
res.old_fattr = nfs_alloc_fattr();
res.new_fattr = nfs_alloc_fattr();
if (res.old_fattr == NULL || res.new_fattr == NULL)
goto out;
status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
nfs_post_op_update_inode(old_dir, res.old_fattr);
nfs_post_op_update_inode(new_dir, res.new_fattr);
out:
nfs_free_fattr(res.old_fattr);
nfs_free_fattr(res.new_fattr);
dprintk("NFS reply rename: %d\n", status);
return status;
}
static int
nfs3_proc_link(struct inode *inode, struct inode *dir, 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;
int status = -ENOMEM;
if (len > NFS3_MAXPATHLEN)
return -ENAMETOOLONG;
dprintk("NFS call symlink %s\n", dentry->d_name.name);
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;
status = nfs3_do_create(dir, dentry, data);
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 nfs3_createdata *data;
umode_t mode = sattr->ia_mode;
int status = -ENOMEM;
dprintk("NFS call mkdir %s\n", dentry->d_name.name);
sattr->ia_mode &= ~current_umask();
data = nfs3_alloc_createdata();
if (data == NULL)
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;
status = nfs3_do_create(dir, dentry, data);
if (status != 0)
goto out;
status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
out:
nfs3_free_createdata(data);
dprintk("NFS reply mkdir: %d\n", status);
return status;
}
static int
nfs3_proc_rmdir(struct inode *dir, 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 dentry *dentry, struct rpc_cred *cred,
u64 cookie, struct page **pages, unsigned int count, int plus)
{
struct inode *dir = dentry->d_inode;
__be32 *verf = NFS_I(dir)->cookieverf;
struct nfs3_readdirargs arg = {
.fh = NFS_FH(dir),
.cookie = cookie,
.verf = {verf[0], verf[1]},
.plus = plus,
.count = count,
.pages = pages
};
struct nfs3_readdirres res = {
.verf = verf,
.plus = plus
};
struct rpc_message msg = {
.rpc_proc = &nfs3_procedures[NFS3PROC_READDIR],
.rpc_argp = &arg,
.rpc_resp = &res,
.rpc_cred = cred
};
int status = -ENOMEM;
if (plus)
msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
dprintk("NFS call readdir%s %d\n",
plus? "plus" : "", (unsigned int) 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",
plus? "plus" : "", status);
return status;
}
static int
nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
dev_t rdev)
{
struct nfs3_createdata *data;
umode_t mode = sattr->ia_mode;
int status = -ENOMEM;
dprintk("NFS call mknod %s %u:%u\n", dentry->d_name.name,
MAJOR(rdev), MINOR(rdev));
sattr->ia_mode &= ~current_umask();
data = nfs3_alloc_createdata();
if (data == NULL)
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;
}
status = nfs3_do_create(dir, dentry, data);
if (status != 0)
goto out;
status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
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_read_data *data)
{
struct inode *inode = data->header->inode;
if (nfs3_async_handle_jukebox(task, inode))
return -EAGAIN;
nfs_invalidate_atime(inode);
nfs_refresh_inode(inode, &data->fattr);
return 0;
}
static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
{
msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
}
static void nfs3_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
{
rpc_call_start(task);
}
static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
{
struct inode *inode = data->header->inode;
if (nfs3_async_handle_jukebox(task, inode))
return -EAGAIN;
if (task->tk_status >= 0)
nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
return 0;
}
static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
{
msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
}
static void nfs3_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
{
rpc_call_start(task);
}
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 (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)
{
msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
}
static int
nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
{
struct inode *inode = file_inode(filp);
return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
}
static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
{
return 0;
}
static int nfs3_return_delegation(struct inode *inode)
{
nfs_wb_all(inode);
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,
.listxattr = nfs3_listxattr,
.getxattr = nfs3_getxattr,
.setxattr = nfs3_setxattr,
.removexattr = nfs3_removexattr,
};
static const struct inode_operations nfs3_file_inode_operations = {
.permission = nfs_permission,
.getattr = nfs_getattr,
.setattr = nfs_setattr,
.listxattr = nfs3_listxattr,
.getxattr = nfs3_getxattr,
.setxattr = nfs3_setxattr,
.removexattr = nfs3_removexattr,
};
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,
.getroot = nfs3_proc_get_root,
.submount = nfs_submount,
.try_mount = nfs_try_mount,
.getattr = nfs3_proc_getattr,
.setattr = nfs3_proc_setattr,
.lookup = nfs3_proc_lookup,
.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 = nfs3_proc_rename,
.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,
.read_setup = nfs3_proc_read_setup,
.read_pageio_init = nfs_pageio_init_read,
.read_rpc_prepare = nfs3_proc_read_rpc_prepare,
.read_done = nfs3_read_done,
.write_setup = nfs3_proc_write_setup,
.write_pageio_init = nfs_pageio_init_write,
.write_rpc_prepare = nfs3_proc_write_rpc_prepare,
.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 = nfs3_forget_cached_acls,
.close_context = nfs_close_context,
.have_delegation = nfs3_have_delegation,
.return_delegation = nfs3_return_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,
};