![Jan Blunck](/assets/img/avatar_default.png)
This is the central patch of a cleanup series. In most cases there is no good reason why someone would want to use a dentry for itself. This series reflects that fact and embeds a struct path into nameidata. Together with the other patches of this series - it enforced the correct order of getting/releasing the reference count on <dentry,vfsmount> pairs - it prepares the VFS for stacking support since it is essential to have a struct path in every place where the stack can be traversed - it reduces the overall code size: without patch series: text data bss dec hex filename 5321639 858418 715768 6895825 6938d1 vmlinux with patch series: text data bss dec hex filename 5320026 858418 715768 6894212 693284 vmlinux This patch: Switch from nd->{dentry,mnt} to nd->path.{dentry,mnt} everywhere. [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix cifs] [akpm@linux-foundation.org: fix smack] Signed-off-by: Jan Blunck <jblunck@suse.de> Signed-off-by: Andreas Gruenbacher <agruen@suse.de> Acked-by: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Casey Schaufler <casey@schaufler-ca.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3736 lines
100 KiB
C
3736 lines
100 KiB
C
/*
|
|
* fs/nfs/nfs4proc.c
|
|
*
|
|
* Client-side procedure declarations for NFSv4.
|
|
*
|
|
* Copyright (c) 2002 The Regents of the University of Michigan.
|
|
* All rights reserved.
|
|
*
|
|
* Kendrick Smith <kmsmith@umich.edu>
|
|
* Andy Adamson <andros@umich.edu>
|
|
*
|
|
* 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/mm.h>
|
|
#include <linux/utsname.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/string.h>
|
|
#include <linux/sunrpc/clnt.h>
|
|
#include <linux/nfs.h>
|
|
#include <linux/nfs4.h>
|
|
#include <linux/nfs_fs.h>
|
|
#include <linux/nfs_page.h>
|
|
#include <linux/smp_lock.h>
|
|
#include <linux/namei.h>
|
|
#include <linux/mount.h>
|
|
|
|
#include "nfs4_fs.h"
|
|
#include "delegation.h"
|
|
#include "iostat.h"
|
|
|
|
#define NFSDBG_FACILITY NFSDBG_PROC
|
|
|
|
#define NFS4_POLL_RETRY_MIN (HZ/10)
|
|
#define NFS4_POLL_RETRY_MAX (15*HZ)
|
|
|
|
struct nfs4_opendata;
|
|
static int _nfs4_proc_open(struct nfs4_opendata *data);
|
|
static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
|
|
static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
|
|
static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
|
|
static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
|
|
static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
|
|
static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
|
|
|
|
/* Prevent leaks of NFSv4 errors into userland */
|
|
int nfs4_map_errors(int err)
|
|
{
|
|
if (err < -1000) {
|
|
dprintk("%s could not handle NFSv4 error %d\n",
|
|
__FUNCTION__, -err);
|
|
return -EIO;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* This is our standard bitmap for GETATTR requests.
|
|
*/
|
|
const u32 nfs4_fattr_bitmap[2] = {
|
|
FATTR4_WORD0_TYPE
|
|
| FATTR4_WORD0_CHANGE
|
|
| FATTR4_WORD0_SIZE
|
|
| FATTR4_WORD0_FSID
|
|
| FATTR4_WORD0_FILEID,
|
|
FATTR4_WORD1_MODE
|
|
| FATTR4_WORD1_NUMLINKS
|
|
| FATTR4_WORD1_OWNER
|
|
| FATTR4_WORD1_OWNER_GROUP
|
|
| FATTR4_WORD1_RAWDEV
|
|
| FATTR4_WORD1_SPACE_USED
|
|
| FATTR4_WORD1_TIME_ACCESS
|
|
| FATTR4_WORD1_TIME_METADATA
|
|
| FATTR4_WORD1_TIME_MODIFY
|
|
};
|
|
|
|
const u32 nfs4_statfs_bitmap[2] = {
|
|
FATTR4_WORD0_FILES_AVAIL
|
|
| FATTR4_WORD0_FILES_FREE
|
|
| FATTR4_WORD0_FILES_TOTAL,
|
|
FATTR4_WORD1_SPACE_AVAIL
|
|
| FATTR4_WORD1_SPACE_FREE
|
|
| FATTR4_WORD1_SPACE_TOTAL
|
|
};
|
|
|
|
const u32 nfs4_pathconf_bitmap[2] = {
|
|
FATTR4_WORD0_MAXLINK
|
|
| FATTR4_WORD0_MAXNAME,
|
|
0
|
|
};
|
|
|
|
const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
|
|
| FATTR4_WORD0_MAXREAD
|
|
| FATTR4_WORD0_MAXWRITE
|
|
| FATTR4_WORD0_LEASE_TIME,
|
|
0
|
|
};
|
|
|
|
const u32 nfs4_fs_locations_bitmap[2] = {
|
|
FATTR4_WORD0_TYPE
|
|
| FATTR4_WORD0_CHANGE
|
|
| FATTR4_WORD0_SIZE
|
|
| FATTR4_WORD0_FSID
|
|
| FATTR4_WORD0_FILEID
|
|
| FATTR4_WORD0_FS_LOCATIONS,
|
|
FATTR4_WORD1_MODE
|
|
| FATTR4_WORD1_NUMLINKS
|
|
| FATTR4_WORD1_OWNER
|
|
| FATTR4_WORD1_OWNER_GROUP
|
|
| FATTR4_WORD1_RAWDEV
|
|
| FATTR4_WORD1_SPACE_USED
|
|
| FATTR4_WORD1_TIME_ACCESS
|
|
| FATTR4_WORD1_TIME_METADATA
|
|
| FATTR4_WORD1_TIME_MODIFY
|
|
| FATTR4_WORD1_MOUNTED_ON_FILEID
|
|
};
|
|
|
|
static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
|
|
struct nfs4_readdir_arg *readdir)
|
|
{
|
|
__be32 *start, *p;
|
|
|
|
BUG_ON(readdir->count < 80);
|
|
if (cookie > 2) {
|
|
readdir->cookie = cookie;
|
|
memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
|
|
return;
|
|
}
|
|
|
|
readdir->cookie = 0;
|
|
memset(&readdir->verifier, 0, sizeof(readdir->verifier));
|
|
if (cookie == 2)
|
|
return;
|
|
|
|
/*
|
|
* NFSv4 servers do not return entries for '.' and '..'
|
|
* Therefore, we fake these entries here. We let '.'
|
|
* have cookie 0 and '..' have cookie 1. Note that
|
|
* when talking to the server, we always send cookie 0
|
|
* instead of 1 or 2.
|
|
*/
|
|
start = p = kmap_atomic(*readdir->pages, KM_USER0);
|
|
|
|
if (cookie == 0) {
|
|
*p++ = xdr_one; /* next */
|
|
*p++ = xdr_zero; /* cookie, first word */
|
|
*p++ = xdr_one; /* cookie, second word */
|
|
*p++ = xdr_one; /* entry len */
|
|
memcpy(p, ".\0\0\0", 4); /* entry */
|
|
p++;
|
|
*p++ = xdr_one; /* bitmap length */
|
|
*p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
|
|
*p++ = htonl(8); /* attribute buffer length */
|
|
p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
|
|
}
|
|
|
|
*p++ = xdr_one; /* next */
|
|
*p++ = xdr_zero; /* cookie, first word */
|
|
*p++ = xdr_two; /* cookie, second word */
|
|
*p++ = xdr_two; /* entry len */
|
|
memcpy(p, "..\0\0", 4); /* entry */
|
|
p++;
|
|
*p++ = xdr_one; /* bitmap length */
|
|
*p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
|
|
*p++ = htonl(8); /* attribute buffer length */
|
|
p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
|
|
|
|
readdir->pgbase = (char *)p - (char *)start;
|
|
readdir->count -= readdir->pgbase;
|
|
kunmap_atomic(start, KM_USER0);
|
|
}
|
|
|
|
static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
|
|
{
|
|
struct nfs_client *clp = server->nfs_client;
|
|
spin_lock(&clp->cl_lock);
|
|
if (time_before(clp->cl_last_renewal,timestamp))
|
|
clp->cl_last_renewal = timestamp;
|
|
spin_unlock(&clp->cl_lock);
|
|
}
|
|
|
|
static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(dir);
|
|
|
|
spin_lock(&dir->i_lock);
|
|
nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
|
|
if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
|
|
nfs_force_lookup_revalidate(dir);
|
|
nfsi->change_attr = cinfo->after;
|
|
spin_unlock(&dir->i_lock);
|
|
}
|
|
|
|
struct nfs4_opendata {
|
|
struct kref kref;
|
|
struct nfs_openargs o_arg;
|
|
struct nfs_openres o_res;
|
|
struct nfs_open_confirmargs c_arg;
|
|
struct nfs_open_confirmres c_res;
|
|
struct nfs_fattr f_attr;
|
|
struct nfs_fattr dir_attr;
|
|
struct path path;
|
|
struct dentry *dir;
|
|
struct nfs4_state_owner *owner;
|
|
struct nfs4_state *state;
|
|
struct iattr attrs;
|
|
unsigned long timestamp;
|
|
unsigned int rpc_done : 1;
|
|
int rpc_status;
|
|
int cancelled;
|
|
};
|
|
|
|
|
|
static void nfs4_init_opendata_res(struct nfs4_opendata *p)
|
|
{
|
|
p->o_res.f_attr = &p->f_attr;
|
|
p->o_res.dir_attr = &p->dir_attr;
|
|
p->o_res.server = p->o_arg.server;
|
|
nfs_fattr_init(&p->f_attr);
|
|
nfs_fattr_init(&p->dir_attr);
|
|
}
|
|
|
|
static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
|
|
struct nfs4_state_owner *sp, int flags,
|
|
const struct iattr *attrs)
|
|
{
|
|
struct dentry *parent = dget_parent(path->dentry);
|
|
struct inode *dir = parent->d_inode;
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
struct nfs4_opendata *p;
|
|
|
|
p = kzalloc(sizeof(*p), GFP_KERNEL);
|
|
if (p == NULL)
|
|
goto err;
|
|
p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
|
|
if (p->o_arg.seqid == NULL)
|
|
goto err_free;
|
|
p->path.mnt = mntget(path->mnt);
|
|
p->path.dentry = dget(path->dentry);
|
|
p->dir = parent;
|
|
p->owner = sp;
|
|
atomic_inc(&sp->so_count);
|
|
p->o_arg.fh = NFS_FH(dir);
|
|
p->o_arg.open_flags = flags,
|
|
p->o_arg.clientid = server->nfs_client->cl_clientid;
|
|
p->o_arg.id = sp->so_owner_id.id;
|
|
p->o_arg.name = &p->path.dentry->d_name;
|
|
p->o_arg.server = server;
|
|
p->o_arg.bitmask = server->attr_bitmask;
|
|
p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
|
|
if (flags & O_EXCL) {
|
|
u32 *s = (u32 *) p->o_arg.u.verifier.data;
|
|
s[0] = jiffies;
|
|
s[1] = current->pid;
|
|
} else if (flags & O_CREAT) {
|
|
p->o_arg.u.attrs = &p->attrs;
|
|
memcpy(&p->attrs, attrs, sizeof(p->attrs));
|
|
}
|
|
p->c_arg.fh = &p->o_res.fh;
|
|
p->c_arg.stateid = &p->o_res.stateid;
|
|
p->c_arg.seqid = p->o_arg.seqid;
|
|
nfs4_init_opendata_res(p);
|
|
kref_init(&p->kref);
|
|
return p;
|
|
err_free:
|
|
kfree(p);
|
|
err:
|
|
dput(parent);
|
|
return NULL;
|
|
}
|
|
|
|
static void nfs4_opendata_free(struct kref *kref)
|
|
{
|
|
struct nfs4_opendata *p = container_of(kref,
|
|
struct nfs4_opendata, kref);
|
|
|
|
nfs_free_seqid(p->o_arg.seqid);
|
|
if (p->state != NULL)
|
|
nfs4_put_open_state(p->state);
|
|
nfs4_put_state_owner(p->owner);
|
|
dput(p->dir);
|
|
dput(p->path.dentry);
|
|
mntput(p->path.mnt);
|
|
kfree(p);
|
|
}
|
|
|
|
static void nfs4_opendata_put(struct nfs4_opendata *p)
|
|
{
|
|
if (p != NULL)
|
|
kref_put(&p->kref, nfs4_opendata_free);
|
|
}
|
|
|
|
static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
|
|
{
|
|
int ret;
|
|
|
|
ret = rpc_wait_for_completion_task(task);
|
|
return ret;
|
|
}
|
|
|
|
static int can_open_cached(struct nfs4_state *state, int mode)
|
|
{
|
|
int ret = 0;
|
|
switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
|
|
case FMODE_READ:
|
|
ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
|
|
break;
|
|
case FMODE_WRITE:
|
|
ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
|
|
break;
|
|
case FMODE_READ|FMODE_WRITE:
|
|
ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
|
|
{
|
|
if ((delegation->type & open_flags) != open_flags)
|
|
return 0;
|
|
if (delegation->flags & NFS_DELEGATION_NEED_RECLAIM)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
|
|
{
|
|
switch (open_flags) {
|
|
case FMODE_WRITE:
|
|
state->n_wronly++;
|
|
break;
|
|
case FMODE_READ:
|
|
state->n_rdonly++;
|
|
break;
|
|
case FMODE_READ|FMODE_WRITE:
|
|
state->n_rdwr++;
|
|
}
|
|
nfs4_state_set_mode_locked(state, state->state | open_flags);
|
|
}
|
|
|
|
static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
|
|
{
|
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
|
|
memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
|
|
memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
|
|
switch (open_flags) {
|
|
case FMODE_READ:
|
|
set_bit(NFS_O_RDONLY_STATE, &state->flags);
|
|
break;
|
|
case FMODE_WRITE:
|
|
set_bit(NFS_O_WRONLY_STATE, &state->flags);
|
|
break;
|
|
case FMODE_READ|FMODE_WRITE:
|
|
set_bit(NFS_O_RDWR_STATE, &state->flags);
|
|
}
|
|
}
|
|
|
|
static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
|
|
{
|
|
write_seqlock(&state->seqlock);
|
|
nfs_set_open_stateid_locked(state, stateid, open_flags);
|
|
write_sequnlock(&state->seqlock);
|
|
}
|
|
|
|
static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *deleg_stateid, int open_flags)
|
|
{
|
|
open_flags &= (FMODE_READ|FMODE_WRITE);
|
|
/*
|
|
* Protect the call to nfs4_state_set_mode_locked and
|
|
* serialise the stateid update
|
|
*/
|
|
write_seqlock(&state->seqlock);
|
|
if (deleg_stateid != NULL) {
|
|
memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
|
|
set_bit(NFS_DELEGATED_STATE, &state->flags);
|
|
}
|
|
if (open_stateid != NULL)
|
|
nfs_set_open_stateid_locked(state, open_stateid, open_flags);
|
|
write_sequnlock(&state->seqlock);
|
|
spin_lock(&state->owner->so_lock);
|
|
update_open_stateflags(state, open_flags);
|
|
spin_unlock(&state->owner->so_lock);
|
|
}
|
|
|
|
static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
|
|
{
|
|
struct nfs_delegation *delegation;
|
|
|
|
rcu_read_lock();
|
|
delegation = rcu_dereference(NFS_I(inode)->delegation);
|
|
if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
rcu_read_unlock();
|
|
nfs_inode_return_delegation(inode);
|
|
}
|
|
|
|
static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
|
|
{
|
|
struct nfs4_state *state = opendata->state;
|
|
struct nfs_inode *nfsi = NFS_I(state->inode);
|
|
struct nfs_delegation *delegation;
|
|
int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
|
|
nfs4_stateid stateid;
|
|
int ret = -EAGAIN;
|
|
|
|
rcu_read_lock();
|
|
delegation = rcu_dereference(nfsi->delegation);
|
|
for (;;) {
|
|
if (can_open_cached(state, open_mode)) {
|
|
spin_lock(&state->owner->so_lock);
|
|
if (can_open_cached(state, open_mode)) {
|
|
update_open_stateflags(state, open_mode);
|
|
spin_unlock(&state->owner->so_lock);
|
|
rcu_read_unlock();
|
|
goto out_return_state;
|
|
}
|
|
spin_unlock(&state->owner->so_lock);
|
|
}
|
|
if (delegation == NULL)
|
|
break;
|
|
if (!can_open_delegated(delegation, open_mode))
|
|
break;
|
|
/* Save the delegation */
|
|
memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
|
|
rcu_read_unlock();
|
|
lock_kernel();
|
|
ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
|
|
unlock_kernel();
|
|
if (ret != 0)
|
|
goto out;
|
|
ret = -EAGAIN;
|
|
rcu_read_lock();
|
|
delegation = rcu_dereference(nfsi->delegation);
|
|
/* If no delegation, try a cached open */
|
|
if (delegation == NULL)
|
|
continue;
|
|
/* Is the delegation still valid? */
|
|
if (memcmp(stateid.data, delegation->stateid.data, sizeof(stateid.data)) != 0)
|
|
continue;
|
|
rcu_read_unlock();
|
|
update_open_stateid(state, NULL, &stateid, open_mode);
|
|
goto out_return_state;
|
|
}
|
|
rcu_read_unlock();
|
|
out:
|
|
return ERR_PTR(ret);
|
|
out_return_state:
|
|
atomic_inc(&state->count);
|
|
return state;
|
|
}
|
|
|
|
static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
|
|
{
|
|
struct inode *inode;
|
|
struct nfs4_state *state = NULL;
|
|
struct nfs_delegation *delegation;
|
|
nfs4_stateid *deleg_stateid = NULL;
|
|
int ret;
|
|
|
|
if (!data->rpc_done) {
|
|
state = nfs4_try_open_cached(data);
|
|
goto out;
|
|
}
|
|
|
|
ret = -EAGAIN;
|
|
if (!(data->f_attr.valid & NFS_ATTR_FATTR))
|
|
goto err;
|
|
inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
|
|
ret = PTR_ERR(inode);
|
|
if (IS_ERR(inode))
|
|
goto err;
|
|
ret = -ENOMEM;
|
|
state = nfs4_get_open_state(inode, data->owner);
|
|
if (state == NULL)
|
|
goto err_put_inode;
|
|
if (data->o_res.delegation_type != 0) {
|
|
int delegation_flags = 0;
|
|
|
|
rcu_read_lock();
|
|
delegation = rcu_dereference(NFS_I(inode)->delegation);
|
|
if (delegation)
|
|
delegation_flags = delegation->flags;
|
|
rcu_read_unlock();
|
|
if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
|
|
nfs_inode_set_delegation(state->inode,
|
|
data->owner->so_cred,
|
|
&data->o_res);
|
|
else
|
|
nfs_inode_reclaim_delegation(state->inode,
|
|
data->owner->so_cred,
|
|
&data->o_res);
|
|
}
|
|
rcu_read_lock();
|
|
delegation = rcu_dereference(NFS_I(inode)->delegation);
|
|
if (delegation != NULL)
|
|
deleg_stateid = &delegation->stateid;
|
|
update_open_stateid(state, &data->o_res.stateid, deleg_stateid, data->o_arg.open_flags);
|
|
rcu_read_unlock();
|
|
iput(inode);
|
|
out:
|
|
return state;
|
|
err_put_inode:
|
|
iput(inode);
|
|
err:
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(state->inode);
|
|
struct nfs_open_context *ctx;
|
|
|
|
spin_lock(&state->inode->i_lock);
|
|
list_for_each_entry(ctx, &nfsi->open_files, list) {
|
|
if (ctx->state != state)
|
|
continue;
|
|
get_nfs_open_context(ctx);
|
|
spin_unlock(&state->inode->i_lock);
|
|
return ctx;
|
|
}
|
|
spin_unlock(&state->inode->i_lock);
|
|
return ERR_PTR(-ENOENT);
|
|
}
|
|
|
|
static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
|
|
{
|
|
struct nfs4_opendata *opendata;
|
|
|
|
opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
|
|
if (opendata == NULL)
|
|
return ERR_PTR(-ENOMEM);
|
|
opendata->state = state;
|
|
atomic_inc(&state->count);
|
|
return opendata;
|
|
}
|
|
|
|
static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
|
|
{
|
|
struct nfs4_state *newstate;
|
|
int ret;
|
|
|
|
opendata->o_arg.open_flags = openflags;
|
|
memset(&opendata->o_res, 0, sizeof(opendata->o_res));
|
|
memset(&opendata->c_res, 0, sizeof(opendata->c_res));
|
|
nfs4_init_opendata_res(opendata);
|
|
ret = _nfs4_proc_open(opendata);
|
|
if (ret != 0)
|
|
return ret;
|
|
newstate = nfs4_opendata_to_nfs4_state(opendata);
|
|
if (IS_ERR(newstate))
|
|
return PTR_ERR(newstate);
|
|
nfs4_close_state(&opendata->path, newstate, openflags);
|
|
*res = newstate;
|
|
return 0;
|
|
}
|
|
|
|
static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
|
|
{
|
|
struct nfs4_state *newstate;
|
|
int ret;
|
|
|
|
/* memory barrier prior to reading state->n_* */
|
|
clear_bit(NFS_DELEGATED_STATE, &state->flags);
|
|
smp_rmb();
|
|
if (state->n_rdwr != 0) {
|
|
ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
|
|
if (ret != 0)
|
|
return ret;
|
|
if (newstate != state)
|
|
return -ESTALE;
|
|
}
|
|
if (state->n_wronly != 0) {
|
|
ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
|
|
if (ret != 0)
|
|
return ret;
|
|
if (newstate != state)
|
|
return -ESTALE;
|
|
}
|
|
if (state->n_rdonly != 0) {
|
|
ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
|
|
if (ret != 0)
|
|
return ret;
|
|
if (newstate != state)
|
|
return -ESTALE;
|
|
}
|
|
/*
|
|
* We may have performed cached opens for all three recoveries.
|
|
* Check if we need to update the current stateid.
|
|
*/
|
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
|
|
memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
|
|
write_seqlock(&state->seqlock);
|
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
|
|
memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
|
|
write_sequnlock(&state->seqlock);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* OPEN_RECLAIM:
|
|
* reclaim state on the server after a reboot.
|
|
*/
|
|
static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
|
|
{
|
|
struct nfs_delegation *delegation;
|
|
struct nfs4_opendata *opendata;
|
|
int delegation_type = 0;
|
|
int status;
|
|
|
|
opendata = nfs4_open_recoverdata_alloc(ctx, state);
|
|
if (IS_ERR(opendata))
|
|
return PTR_ERR(opendata);
|
|
opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
|
|
opendata->o_arg.fh = NFS_FH(state->inode);
|
|
rcu_read_lock();
|
|
delegation = rcu_dereference(NFS_I(state->inode)->delegation);
|
|
if (delegation != NULL && (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) != 0)
|
|
delegation_type = delegation->type;
|
|
rcu_read_unlock();
|
|
opendata->o_arg.u.delegation_type = delegation_type;
|
|
status = nfs4_open_recover(opendata, state);
|
|
nfs4_opendata_put(opendata);
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(state->inode);
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = _nfs4_do_open_reclaim(ctx, state);
|
|
if (err != -NFS4ERR_DELAY)
|
|
break;
|
|
nfs4_handle_exception(server, err, &exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
|
|
{
|
|
struct nfs_open_context *ctx;
|
|
int ret;
|
|
|
|
ctx = nfs4_state_find_open_context(state);
|
|
if (IS_ERR(ctx))
|
|
return PTR_ERR(ctx);
|
|
ret = nfs4_do_open_reclaim(ctx, state);
|
|
put_nfs_open_context(ctx);
|
|
return ret;
|
|
}
|
|
|
|
static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
|
|
{
|
|
struct nfs4_opendata *opendata;
|
|
int ret;
|
|
|
|
opendata = nfs4_open_recoverdata_alloc(ctx, state);
|
|
if (IS_ERR(opendata))
|
|
return PTR_ERR(opendata);
|
|
opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
|
|
memcpy(opendata->o_arg.u.delegation.data, stateid->data,
|
|
sizeof(opendata->o_arg.u.delegation.data));
|
|
ret = nfs4_open_recover(opendata, state);
|
|
nfs4_opendata_put(opendata);
|
|
return ret;
|
|
}
|
|
|
|
int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
struct nfs_server *server = NFS_SERVER(state->inode);
|
|
int err;
|
|
do {
|
|
err = _nfs4_open_delegation_recall(ctx, state, stateid);
|
|
switch (err) {
|
|
case 0:
|
|
return err;
|
|
case -NFS4ERR_STALE_CLIENTID:
|
|
case -NFS4ERR_STALE_STATEID:
|
|
case -NFS4ERR_EXPIRED:
|
|
/* Don't recall a delegation if it was lost */
|
|
nfs4_schedule_state_recovery(server->nfs_client);
|
|
return err;
|
|
}
|
|
err = nfs4_handle_exception(server, err, &exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_opendata *data = calldata;
|
|
|
|
data->rpc_status = task->tk_status;
|
|
if (RPC_ASSASSINATED(task))
|
|
return;
|
|
if (data->rpc_status == 0) {
|
|
memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
|
|
sizeof(data->o_res.stateid.data));
|
|
nfs_confirm_seqid(&data->owner->so_seqid, 0);
|
|
renew_lease(data->o_res.server, data->timestamp);
|
|
data->rpc_done = 1;
|
|
}
|
|
nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
|
|
}
|
|
|
|
static void nfs4_open_confirm_release(void *calldata)
|
|
{
|
|
struct nfs4_opendata *data = calldata;
|
|
struct nfs4_state *state = NULL;
|
|
|
|
/* If this request hasn't been cancelled, do nothing */
|
|
if (data->cancelled == 0)
|
|
goto out_free;
|
|
/* In case of error, no cleanup! */
|
|
if (!data->rpc_done)
|
|
goto out_free;
|
|
state = nfs4_opendata_to_nfs4_state(data);
|
|
if (!IS_ERR(state))
|
|
nfs4_close_state(&data->path, state, data->o_arg.open_flags);
|
|
out_free:
|
|
nfs4_opendata_put(data);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_open_confirm_ops = {
|
|
.rpc_call_done = nfs4_open_confirm_done,
|
|
.rpc_release = nfs4_open_confirm_release,
|
|
};
|
|
|
|
/*
|
|
* Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
|
|
*/
|
|
static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
|
|
struct rpc_task *task;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
|
|
.rpc_argp = &data->c_arg,
|
|
.rpc_resp = &data->c_res,
|
|
.rpc_cred = data->owner->so_cred,
|
|
};
|
|
struct rpc_task_setup task_setup_data = {
|
|
.rpc_client = server->client,
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs4_open_confirm_ops,
|
|
.callback_data = data,
|
|
.flags = RPC_TASK_ASYNC,
|
|
};
|
|
int status;
|
|
|
|
kref_get(&data->kref);
|
|
data->rpc_done = 0;
|
|
data->rpc_status = 0;
|
|
data->timestamp = jiffies;
|
|
task = rpc_run_task(&task_setup_data);
|
|
if (IS_ERR(task))
|
|
return PTR_ERR(task);
|
|
status = nfs4_wait_for_completion_rpc_task(task);
|
|
if (status != 0) {
|
|
data->cancelled = 1;
|
|
smp_wmb();
|
|
} else
|
|
status = data->rpc_status;
|
|
rpc_put_task(task);
|
|
return status;
|
|
}
|
|
|
|
static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_opendata *data = calldata;
|
|
struct nfs4_state_owner *sp = data->owner;
|
|
|
|
if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
|
|
return;
|
|
/*
|
|
* Check if we still need to send an OPEN call, or if we can use
|
|
* a delegation instead.
|
|
*/
|
|
if (data->state != NULL) {
|
|
struct nfs_delegation *delegation;
|
|
|
|
if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
|
|
goto out_no_action;
|
|
rcu_read_lock();
|
|
delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
|
|
if (delegation != NULL &&
|
|
(delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0) {
|
|
rcu_read_unlock();
|
|
goto out_no_action;
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
/* Update sequence id. */
|
|
data->o_arg.id = sp->so_owner_id.id;
|
|
data->o_arg.clientid = sp->so_client->cl_clientid;
|
|
if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
|
|
task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
|
|
nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
|
|
}
|
|
data->timestamp = jiffies;
|
|
rpc_call_start(task);
|
|
return;
|
|
out_no_action:
|
|
task->tk_action = NULL;
|
|
|
|
}
|
|
|
|
static void nfs4_open_done(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_opendata *data = calldata;
|
|
|
|
data->rpc_status = task->tk_status;
|
|
if (RPC_ASSASSINATED(task))
|
|
return;
|
|
if (task->tk_status == 0) {
|
|
switch (data->o_res.f_attr->mode & S_IFMT) {
|
|
case S_IFREG:
|
|
break;
|
|
case S_IFLNK:
|
|
data->rpc_status = -ELOOP;
|
|
break;
|
|
case S_IFDIR:
|
|
data->rpc_status = -EISDIR;
|
|
break;
|
|
default:
|
|
data->rpc_status = -ENOTDIR;
|
|
}
|
|
renew_lease(data->o_res.server, data->timestamp);
|
|
if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
|
|
nfs_confirm_seqid(&data->owner->so_seqid, 0);
|
|
}
|
|
nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
|
|
data->rpc_done = 1;
|
|
}
|
|
|
|
static void nfs4_open_release(void *calldata)
|
|
{
|
|
struct nfs4_opendata *data = calldata;
|
|
struct nfs4_state *state = NULL;
|
|
|
|
/* If this request hasn't been cancelled, do nothing */
|
|
if (data->cancelled == 0)
|
|
goto out_free;
|
|
/* In case of error, no cleanup! */
|
|
if (data->rpc_status != 0 || !data->rpc_done)
|
|
goto out_free;
|
|
/* In case we need an open_confirm, no cleanup! */
|
|
if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
|
|
goto out_free;
|
|
state = nfs4_opendata_to_nfs4_state(data);
|
|
if (!IS_ERR(state))
|
|
nfs4_close_state(&data->path, state, data->o_arg.open_flags);
|
|
out_free:
|
|
nfs4_opendata_put(data);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_open_ops = {
|
|
.rpc_call_prepare = nfs4_open_prepare,
|
|
.rpc_call_done = nfs4_open_done,
|
|
.rpc_release = nfs4_open_release,
|
|
};
|
|
|
|
/*
|
|
* Note: On error, nfs4_proc_open will free the struct nfs4_opendata
|
|
*/
|
|
static int _nfs4_proc_open(struct nfs4_opendata *data)
|
|
{
|
|
struct inode *dir = data->dir->d_inode;
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
struct nfs_openargs *o_arg = &data->o_arg;
|
|
struct nfs_openres *o_res = &data->o_res;
|
|
struct rpc_task *task;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
|
|
.rpc_argp = o_arg,
|
|
.rpc_resp = o_res,
|
|
.rpc_cred = data->owner->so_cred,
|
|
};
|
|
struct rpc_task_setup task_setup_data = {
|
|
.rpc_client = server->client,
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs4_open_ops,
|
|
.callback_data = data,
|
|
.flags = RPC_TASK_ASYNC,
|
|
};
|
|
int status;
|
|
|
|
kref_get(&data->kref);
|
|
data->rpc_done = 0;
|
|
data->rpc_status = 0;
|
|
data->cancelled = 0;
|
|
task = rpc_run_task(&task_setup_data);
|
|
if (IS_ERR(task))
|
|
return PTR_ERR(task);
|
|
status = nfs4_wait_for_completion_rpc_task(task);
|
|
if (status != 0) {
|
|
data->cancelled = 1;
|
|
smp_wmb();
|
|
} else
|
|
status = data->rpc_status;
|
|
rpc_put_task(task);
|
|
if (status != 0 || !data->rpc_done)
|
|
return status;
|
|
|
|
if (o_res->fh.size == 0)
|
|
_nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
|
|
|
|
if (o_arg->open_flags & O_CREAT) {
|
|
update_changeattr(dir, &o_res->cinfo);
|
|
nfs_post_op_update_inode(dir, o_res->dir_attr);
|
|
} else
|
|
nfs_refresh_inode(dir, o_res->dir_attr);
|
|
if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
|
|
status = _nfs4_proc_open_confirm(data);
|
|
if (status != 0)
|
|
return status;
|
|
}
|
|
if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
|
|
_nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
|
|
return 0;
|
|
}
|
|
|
|
static int nfs4_recover_expired_lease(struct nfs_server *server)
|
|
{
|
|
struct nfs_client *clp = server->nfs_client;
|
|
int ret;
|
|
|
|
for (;;) {
|
|
ret = nfs4_wait_clnt_recover(server->client, clp);
|
|
if (ret != 0)
|
|
return ret;
|
|
if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
|
|
break;
|
|
nfs4_schedule_state_recovery(clp);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* OPEN_EXPIRED:
|
|
* reclaim state on the server after a network partition.
|
|
* Assumes caller holds the appropriate lock
|
|
*/
|
|
static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
|
|
{
|
|
struct nfs4_opendata *opendata;
|
|
int ret;
|
|
|
|
opendata = nfs4_open_recoverdata_alloc(ctx, state);
|
|
if (IS_ERR(opendata))
|
|
return PTR_ERR(opendata);
|
|
ret = nfs4_open_recover(opendata, state);
|
|
if (ret == -ESTALE) {
|
|
/* Invalidate the state owner so we don't ever use it again */
|
|
nfs4_drop_state_owner(state->owner);
|
|
d_drop(ctx->path.dentry);
|
|
}
|
|
nfs4_opendata_put(opendata);
|
|
return ret;
|
|
}
|
|
|
|
static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(state->inode);
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
|
|
do {
|
|
err = _nfs4_open_expired(ctx, state);
|
|
if (err == -NFS4ERR_DELAY)
|
|
nfs4_handle_exception(server, err, &exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
|
|
{
|
|
struct nfs_open_context *ctx;
|
|
int ret;
|
|
|
|
ctx = nfs4_state_find_open_context(state);
|
|
if (IS_ERR(ctx))
|
|
return PTR_ERR(ctx);
|
|
ret = nfs4_do_open_expired(ctx, state);
|
|
put_nfs_open_context(ctx);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
|
|
* fields corresponding to attributes that were used to store the verifier.
|
|
* Make sure we clobber those fields in the later setattr call
|
|
*/
|
|
static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
|
|
{
|
|
if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
|
|
!(sattr->ia_valid & ATTR_ATIME_SET))
|
|
sattr->ia_valid |= ATTR_ATIME;
|
|
|
|
if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
|
|
!(sattr->ia_valid & ATTR_MTIME_SET))
|
|
sattr->ia_valid |= ATTR_MTIME;
|
|
}
|
|
|
|
/*
|
|
* Returns a referenced nfs4_state
|
|
*/
|
|
static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
|
|
{
|
|
struct nfs4_state_owner *sp;
|
|
struct nfs4_state *state = NULL;
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
struct nfs_client *clp = server->nfs_client;
|
|
struct nfs4_opendata *opendata;
|
|
int status;
|
|
|
|
/* Protect against reboot recovery conflicts */
|
|
status = -ENOMEM;
|
|
if (!(sp = nfs4_get_state_owner(server, cred))) {
|
|
dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
|
|
goto out_err;
|
|
}
|
|
status = nfs4_recover_expired_lease(server);
|
|
if (status != 0)
|
|
goto err_put_state_owner;
|
|
if (path->dentry->d_inode != NULL)
|
|
nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
|
|
down_read(&clp->cl_sem);
|
|
status = -ENOMEM;
|
|
opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
|
|
if (opendata == NULL)
|
|
goto err_release_rwsem;
|
|
|
|
if (path->dentry->d_inode != NULL)
|
|
opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
|
|
|
|
status = _nfs4_proc_open(opendata);
|
|
if (status != 0)
|
|
goto err_opendata_put;
|
|
|
|
if (opendata->o_arg.open_flags & O_EXCL)
|
|
nfs4_exclusive_attrset(opendata, sattr);
|
|
|
|
state = nfs4_opendata_to_nfs4_state(opendata);
|
|
status = PTR_ERR(state);
|
|
if (IS_ERR(state))
|
|
goto err_opendata_put;
|
|
nfs4_opendata_put(opendata);
|
|
nfs4_put_state_owner(sp);
|
|
up_read(&clp->cl_sem);
|
|
*res = state;
|
|
return 0;
|
|
err_opendata_put:
|
|
nfs4_opendata_put(opendata);
|
|
err_release_rwsem:
|
|
up_read(&clp->cl_sem);
|
|
err_put_state_owner:
|
|
nfs4_put_state_owner(sp);
|
|
out_err:
|
|
*res = NULL;
|
|
return status;
|
|
}
|
|
|
|
|
|
static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
struct nfs4_state *res;
|
|
int status;
|
|
|
|
do {
|
|
status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
|
|
if (status == 0)
|
|
break;
|
|
/* NOTE: BAD_SEQID means the server and client disagree about the
|
|
* book-keeping w.r.t. state-changing operations
|
|
* (OPEN/CLOSE/LOCK/LOCKU...)
|
|
* It is actually a sign of a bug on the client or on the server.
|
|
*
|
|
* If we receive a BAD_SEQID error in the particular case of
|
|
* doing an OPEN, we assume that nfs_increment_open_seqid() will
|
|
* have unhashed the old state_owner for us, and that we can
|
|
* therefore safely retry using a new one. We should still warn
|
|
* the user though...
|
|
*/
|
|
if (status == -NFS4ERR_BAD_SEQID) {
|
|
printk(KERN_WARNING "NFS: v4 server %s "
|
|
" returned a bad sequence-id error!\n",
|
|
NFS_SERVER(dir)->nfs_client->cl_hostname);
|
|
exception.retry = 1;
|
|
continue;
|
|
}
|
|
/*
|
|
* BAD_STATEID on OPEN means that the server cancelled our
|
|
* state before it received the OPEN_CONFIRM.
|
|
* Recover by retrying the request as per the discussion
|
|
* on Page 181 of RFC3530.
|
|
*/
|
|
if (status == -NFS4ERR_BAD_STATEID) {
|
|
exception.retry = 1;
|
|
continue;
|
|
}
|
|
if (status == -EAGAIN) {
|
|
/* We must have found a delegation */
|
|
exception.retry = 1;
|
|
continue;
|
|
}
|
|
res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
|
|
status, &exception));
|
|
} while (exception.retry);
|
|
return res;
|
|
}
|
|
|
|
static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
|
|
struct iattr *sattr, struct nfs4_state *state)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs_setattrargs arg = {
|
|
.fh = NFS_FH(inode),
|
|
.iap = sattr,
|
|
.server = server,
|
|
.bitmask = server->attr_bitmask,
|
|
};
|
|
struct nfs_setattrres res = {
|
|
.fattr = fattr,
|
|
.server = server,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
};
|
|
unsigned long timestamp = jiffies;
|
|
int status;
|
|
|
|
nfs_fattr_init(fattr);
|
|
|
|
if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
|
|
/* Use that stateid */
|
|
} else if (state != NULL) {
|
|
msg.rpc_cred = state->owner->so_cred;
|
|
nfs4_copy_stateid(&arg.stateid, state, current->files);
|
|
} else
|
|
memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
|
|
|
|
status = rpc_call_sync(server->client, &msg, 0);
|
|
if (status == 0 && state != NULL)
|
|
renew_lease(server, timestamp);
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
|
|
struct iattr *sattr, struct nfs4_state *state)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(server,
|
|
_nfs4_do_setattr(inode, fattr, sattr, state),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
struct nfs4_closedata {
|
|
struct path path;
|
|
struct inode *inode;
|
|
struct nfs4_state *state;
|
|
struct nfs_closeargs arg;
|
|
struct nfs_closeres res;
|
|
struct nfs_fattr fattr;
|
|
unsigned long timestamp;
|
|
};
|
|
|
|
static void nfs4_free_closedata(void *data)
|
|
{
|
|
struct nfs4_closedata *calldata = data;
|
|
struct nfs4_state_owner *sp = calldata->state->owner;
|
|
|
|
nfs4_put_open_state(calldata->state);
|
|
nfs_free_seqid(calldata->arg.seqid);
|
|
nfs4_put_state_owner(sp);
|
|
dput(calldata->path.dentry);
|
|
mntput(calldata->path.mnt);
|
|
kfree(calldata);
|
|
}
|
|
|
|
static void nfs4_close_done(struct rpc_task *task, void *data)
|
|
{
|
|
struct nfs4_closedata *calldata = data;
|
|
struct nfs4_state *state = calldata->state;
|
|
struct nfs_server *server = NFS_SERVER(calldata->inode);
|
|
|
|
if (RPC_ASSASSINATED(task))
|
|
return;
|
|
/* hmm. we are done with the inode, and in the process of freeing
|
|
* the state_owner. we keep this around to process errors
|
|
*/
|
|
nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
|
|
switch (task->tk_status) {
|
|
case 0:
|
|
nfs_set_open_stateid(state, &calldata->res.stateid, 0);
|
|
renew_lease(server, calldata->timestamp);
|
|
break;
|
|
case -NFS4ERR_STALE_STATEID:
|
|
case -NFS4ERR_EXPIRED:
|
|
break;
|
|
default:
|
|
if (nfs4_async_handle_error(task, server) == -EAGAIN) {
|
|
rpc_restart_call(task);
|
|
return;
|
|
}
|
|
}
|
|
nfs_refresh_inode(calldata->inode, calldata->res.fattr);
|
|
}
|
|
|
|
static void nfs4_close_prepare(struct rpc_task *task, void *data)
|
|
{
|
|
struct nfs4_closedata *calldata = data;
|
|
struct nfs4_state *state = calldata->state;
|
|
int clear_rd, clear_wr, clear_rdwr;
|
|
|
|
if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
|
|
return;
|
|
|
|
clear_rd = clear_wr = clear_rdwr = 0;
|
|
spin_lock(&state->owner->so_lock);
|
|
/* Calculate the change in open mode */
|
|
if (state->n_rdwr == 0) {
|
|
if (state->n_rdonly == 0) {
|
|
clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
|
|
clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
|
|
}
|
|
if (state->n_wronly == 0) {
|
|
clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
|
|
clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
|
|
}
|
|
}
|
|
spin_unlock(&state->owner->so_lock);
|
|
if (!clear_rd && !clear_wr && !clear_rdwr) {
|
|
/* Note: exit _without_ calling nfs4_close_done */
|
|
task->tk_action = NULL;
|
|
return;
|
|
}
|
|
nfs_fattr_init(calldata->res.fattr);
|
|
if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
|
|
task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
|
|
calldata->arg.open_flags = FMODE_READ;
|
|
} else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
|
|
task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
|
|
calldata->arg.open_flags = FMODE_WRITE;
|
|
}
|
|
calldata->timestamp = jiffies;
|
|
rpc_call_start(task);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_close_ops = {
|
|
.rpc_call_prepare = nfs4_close_prepare,
|
|
.rpc_call_done = nfs4_close_done,
|
|
.rpc_release = nfs4_free_closedata,
|
|
};
|
|
|
|
/*
|
|
* It is possible for data to be read/written from a mem-mapped file
|
|
* after the sys_close call (which hits the vfs layer as a flush).
|
|
* This means that we can't safely call nfsv4 close on a file until
|
|
* the inode is cleared. This in turn means that we are not good
|
|
* NFSv4 citizens - we do not indicate to the server to update the file's
|
|
* share state even when we are done with one of the three share
|
|
* stateid's in the inode.
|
|
*
|
|
* NOTE: Caller must be holding the sp->so_owner semaphore!
|
|
*/
|
|
int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(state->inode);
|
|
struct nfs4_closedata *calldata;
|
|
struct nfs4_state_owner *sp = state->owner;
|
|
struct rpc_task *task;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
|
|
.rpc_cred = state->owner->so_cred,
|
|
};
|
|
struct rpc_task_setup task_setup_data = {
|
|
.rpc_client = server->client,
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs4_close_ops,
|
|
.flags = RPC_TASK_ASYNC,
|
|
};
|
|
int status = -ENOMEM;
|
|
|
|
calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
|
|
if (calldata == NULL)
|
|
goto out;
|
|
calldata->inode = state->inode;
|
|
calldata->state = state;
|
|
calldata->arg.fh = NFS_FH(state->inode);
|
|
calldata->arg.stateid = &state->open_stateid;
|
|
/* Serialization for the sequence id */
|
|
calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
|
|
if (calldata->arg.seqid == NULL)
|
|
goto out_free_calldata;
|
|
calldata->arg.bitmask = server->attr_bitmask;
|
|
calldata->res.fattr = &calldata->fattr;
|
|
calldata->res.server = server;
|
|
calldata->path.mnt = mntget(path->mnt);
|
|
calldata->path.dentry = dget(path->dentry);
|
|
|
|
msg.rpc_argp = &calldata->arg,
|
|
msg.rpc_resp = &calldata->res,
|
|
task_setup_data.callback_data = calldata;
|
|
task = rpc_run_task(&task_setup_data);
|
|
if (IS_ERR(task))
|
|
return PTR_ERR(task);
|
|
status = 0;
|
|
if (wait)
|
|
status = rpc_wait_for_completion_task(task);
|
|
rpc_put_task(task);
|
|
return status;
|
|
out_free_calldata:
|
|
kfree(calldata);
|
|
out:
|
|
nfs4_put_open_state(state);
|
|
nfs4_put_state_owner(sp);
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
|
|
{
|
|
struct file *filp;
|
|
int ret;
|
|
|
|
/* If the open_intent is for execute, we have an extra check to make */
|
|
if (nd->intent.open.flags & FMODE_EXEC) {
|
|
ret = nfs_may_open(state->inode,
|
|
state->owner->so_cred,
|
|
nd->intent.open.flags);
|
|
if (ret < 0)
|
|
goto out_close;
|
|
}
|
|
filp = lookup_instantiate_filp(nd, path->dentry, NULL);
|
|
if (!IS_ERR(filp)) {
|
|
struct nfs_open_context *ctx;
|
|
ctx = nfs_file_open_context(filp);
|
|
ctx->state = state;
|
|
return 0;
|
|
}
|
|
ret = PTR_ERR(filp);
|
|
out_close:
|
|
nfs4_close_sync(path, state, nd->intent.open.flags);
|
|
return ret;
|
|
}
|
|
|
|
struct dentry *
|
|
nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
|
|
{
|
|
struct path path = {
|
|
.mnt = nd->path.mnt,
|
|
.dentry = dentry,
|
|
};
|
|
struct dentry *parent;
|
|
struct iattr attr;
|
|
struct rpc_cred *cred;
|
|
struct nfs4_state *state;
|
|
struct dentry *res;
|
|
|
|
if (nd->flags & LOOKUP_CREATE) {
|
|
attr.ia_mode = nd->intent.open.create_mode;
|
|
attr.ia_valid = ATTR_MODE;
|
|
if (!IS_POSIXACL(dir))
|
|
attr.ia_mode &= ~current->fs->umask;
|
|
} else {
|
|
attr.ia_valid = 0;
|
|
BUG_ON(nd->intent.open.flags & O_CREAT);
|
|
}
|
|
|
|
cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
|
|
if (IS_ERR(cred))
|
|
return (struct dentry *)cred;
|
|
parent = dentry->d_parent;
|
|
/* Protect against concurrent sillydeletes */
|
|
nfs_block_sillyrename(parent);
|
|
state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
|
|
put_rpccred(cred);
|
|
if (IS_ERR(state)) {
|
|
if (PTR_ERR(state) == -ENOENT) {
|
|
d_add(dentry, NULL);
|
|
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
|
|
}
|
|
nfs_unblock_sillyrename(parent);
|
|
return (struct dentry *)state;
|
|
}
|
|
res = d_add_unique(dentry, igrab(state->inode));
|
|
if (res != NULL)
|
|
path.dentry = res;
|
|
nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
|
|
nfs_unblock_sillyrename(parent);
|
|
nfs4_intent_set_file(nd, &path, state);
|
|
return res;
|
|
}
|
|
|
|
int
|
|
nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
|
|
{
|
|
struct path path = {
|
|
.mnt = nd->path.mnt,
|
|
.dentry = dentry,
|
|
};
|
|
struct rpc_cred *cred;
|
|
struct nfs4_state *state;
|
|
|
|
cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
|
|
if (IS_ERR(cred))
|
|
return PTR_ERR(cred);
|
|
state = nfs4_do_open(dir, &path, openflags, NULL, cred);
|
|
put_rpccred(cred);
|
|
if (IS_ERR(state)) {
|
|
switch (PTR_ERR(state)) {
|
|
case -EPERM:
|
|
case -EACCES:
|
|
case -EDQUOT:
|
|
case -ENOSPC:
|
|
case -EROFS:
|
|
lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
|
|
return 1;
|
|
default:
|
|
goto out_drop;
|
|
}
|
|
}
|
|
if (state->inode == dentry->d_inode) {
|
|
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
|
|
nfs4_intent_set_file(nd, &path, state);
|
|
return 1;
|
|
}
|
|
nfs4_close_sync(&path, state, openflags);
|
|
out_drop:
|
|
d_drop(dentry);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
|
|
{
|
|
struct nfs4_server_caps_res res = {};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
|
|
.rpc_argp = fhandle,
|
|
.rpc_resp = &res,
|
|
};
|
|
int status;
|
|
|
|
status = rpc_call_sync(server->client, &msg, 0);
|
|
if (status == 0) {
|
|
memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
|
|
if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
|
|
server->caps |= NFS_CAP_ACLS;
|
|
if (res.has_links != 0)
|
|
server->caps |= NFS_CAP_HARDLINKS;
|
|
if (res.has_symlinks != 0)
|
|
server->caps |= NFS_CAP_SYMLINKS;
|
|
server->acl_bitmask = res.acl_bitmask;
|
|
}
|
|
return status;
|
|
}
|
|
|
|
int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(server,
|
|
_nfs4_server_capabilities(server, fhandle),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fsinfo *info)
|
|
{
|
|
struct nfs4_lookup_root_arg args = {
|
|
.bitmask = nfs4_fattr_bitmap,
|
|
};
|
|
struct nfs4_lookup_res res = {
|
|
.server = server,
|
|
.fattr = info->fattr,
|
|
.fh = fhandle,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
nfs_fattr_init(info->fattr);
|
|
return rpc_call_sync(server->client, &msg, 0);
|
|
}
|
|
|
|
static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fsinfo *info)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(server,
|
|
_nfs4_lookup_root(server, fhandle, info),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* get the file handle for the "/" directory on the server
|
|
*/
|
|
static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fsinfo *info)
|
|
{
|
|
int status;
|
|
|
|
status = nfs4_lookup_root(server, fhandle, info);
|
|
if (status == 0)
|
|
status = nfs4_server_capabilities(server, fhandle);
|
|
if (status == 0)
|
|
status = nfs4_do_fsinfo(server, fhandle, info);
|
|
return nfs4_map_errors(status);
|
|
}
|
|
|
|
/*
|
|
* Get locations and (maybe) other attributes of a referral.
|
|
* Note that we'll actually follow the referral later when
|
|
* we detect fsid mismatch in inode revalidation
|
|
*/
|
|
static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
|
|
{
|
|
int status = -ENOMEM;
|
|
struct page *page = NULL;
|
|
struct nfs4_fs_locations *locations = NULL;
|
|
|
|
page = alloc_page(GFP_KERNEL);
|
|
if (page == NULL)
|
|
goto out;
|
|
locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
|
|
if (locations == NULL)
|
|
goto out;
|
|
|
|
status = nfs4_proc_fs_locations(dir, name, locations, page);
|
|
if (status != 0)
|
|
goto out;
|
|
/* Make sure server returned a different fsid for the referral */
|
|
if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
|
|
dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
|
|
status = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
|
|
fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
|
|
if (!fattr->mode)
|
|
fattr->mode = S_IFDIR;
|
|
memset(fhandle, 0, sizeof(struct nfs_fh));
|
|
out:
|
|
if (page)
|
|
__free_page(page);
|
|
if (locations)
|
|
kfree(locations);
|
|
return status;
|
|
}
|
|
|
|
static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
|
|
{
|
|
struct nfs4_getattr_arg args = {
|
|
.fh = fhandle,
|
|
.bitmask = server->attr_bitmask,
|
|
};
|
|
struct nfs4_getattr_res res = {
|
|
.fattr = fattr,
|
|
.server = server,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
|
|
nfs_fattr_init(fattr);
|
|
return rpc_call_sync(server->client, &msg, 0);
|
|
}
|
|
|
|
static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(server,
|
|
_nfs4_proc_getattr(server, fhandle, fattr),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* The file is not closed if it is opened due to the a request to change
|
|
* the size of the file. The open call will not be needed once the
|
|
* VFS layer lookup-intents are implemented.
|
|
*
|
|
* Close is called when the inode is destroyed.
|
|
* If we haven't opened the file for O_WRONLY, we
|
|
* need to in the size_change case to obtain a stateid.
|
|
*
|
|
* Got race?
|
|
* Because OPEN is always done by name in nfsv4, it is
|
|
* possible that we opened a different file by the same
|
|
* name. We can recognize this race condition, but we
|
|
* can't do anything about it besides returning an error.
|
|
*
|
|
* This will be fixed with VFS changes (lookup-intent).
|
|
*/
|
|
static int
|
|
nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
|
|
struct iattr *sattr)
|
|
{
|
|
struct rpc_cred *cred;
|
|
struct inode *inode = dentry->d_inode;
|
|
struct nfs_open_context *ctx;
|
|
struct nfs4_state *state = NULL;
|
|
int status;
|
|
|
|
nfs_fattr_init(fattr);
|
|
|
|
cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
|
|
if (IS_ERR(cred))
|
|
return PTR_ERR(cred);
|
|
|
|
/* Search for an existing open(O_WRITE) file */
|
|
ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
|
|
if (ctx != NULL)
|
|
state = ctx->state;
|
|
|
|
status = nfs4_do_setattr(inode, fattr, sattr, state);
|
|
if (status == 0)
|
|
nfs_setattr_update_inode(inode, sattr);
|
|
if (ctx != NULL)
|
|
put_nfs_open_context(ctx);
|
|
put_rpccred(cred);
|
|
return status;
|
|
}
|
|
|
|
static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
|
|
const struct qstr *name, struct nfs_fh *fhandle,
|
|
struct nfs_fattr *fattr)
|
|
{
|
|
int status;
|
|
struct nfs4_lookup_arg args = {
|
|
.bitmask = server->attr_bitmask,
|
|
.dir_fh = dirfh,
|
|
.name = name,
|
|
};
|
|
struct nfs4_lookup_res res = {
|
|
.server = server,
|
|
.fattr = fattr,
|
|
.fh = fhandle,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
|
|
nfs_fattr_init(fattr);
|
|
|
|
dprintk("NFS call lookupfh %s\n", name->name);
|
|
status = rpc_call_sync(server->client, &msg, 0);
|
|
dprintk("NFS reply lookupfh: %d\n", status);
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
|
|
struct qstr *name, struct nfs_fh *fhandle,
|
|
struct nfs_fattr *fattr)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
|
|
/* FIXME: !!!! */
|
|
if (err == -NFS4ERR_MOVED) {
|
|
err = -EREMOTE;
|
|
break;
|
|
}
|
|
err = nfs4_handle_exception(server, err, &exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
|
|
struct nfs_fh *fhandle, struct nfs_fattr *fattr)
|
|
{
|
|
int status;
|
|
|
|
dprintk("NFS call lookup %s\n", name->name);
|
|
status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
|
|
if (status == -NFS4ERR_MOVED)
|
|
status = nfs4_get_referral(dir, name, fattr, fhandle);
|
|
dprintk("NFS reply lookup: %d\n", status);
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(NFS_SERVER(dir),
|
|
_nfs4_proc_lookup(dir, name, fhandle, fattr),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs_fattr fattr;
|
|
struct nfs4_accessargs args = {
|
|
.fh = NFS_FH(inode),
|
|
.bitmask = server->attr_bitmask,
|
|
};
|
|
struct nfs4_accessres res = {
|
|
.server = server,
|
|
.fattr = &fattr,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
.rpc_cred = entry->cred,
|
|
};
|
|
int mode = entry->mask;
|
|
int status;
|
|
|
|
/*
|
|
* Determine which access bits we want to ask for...
|
|
*/
|
|
if (mode & MAY_READ)
|
|
args.access |= NFS4_ACCESS_READ;
|
|
if (S_ISDIR(inode->i_mode)) {
|
|
if (mode & MAY_WRITE)
|
|
args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
|
|
if (mode & MAY_EXEC)
|
|
args.access |= NFS4_ACCESS_LOOKUP;
|
|
} else {
|
|
if (mode & MAY_WRITE)
|
|
args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
|
|
if (mode & MAY_EXEC)
|
|
args.access |= NFS4_ACCESS_EXECUTE;
|
|
}
|
|
nfs_fattr_init(&fattr);
|
|
status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
|
|
if (!status) {
|
|
entry->mask = 0;
|
|
if (res.access & NFS4_ACCESS_READ)
|
|
entry->mask |= MAY_READ;
|
|
if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
|
|
entry->mask |= MAY_WRITE;
|
|
if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
|
|
entry->mask |= MAY_EXEC;
|
|
nfs_refresh_inode(inode, &fattr);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(NFS_SERVER(inode),
|
|
_nfs4_proc_access(inode, entry),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* TODO: For the time being, we don't try to get any attributes
|
|
* along with any of the zero-copy operations READ, READDIR,
|
|
* READLINK, WRITE.
|
|
*
|
|
* In the case of the first three, we want to put the GETATTR
|
|
* after the read-type operation -- this is because it is hard
|
|
* to predict the length of a GETATTR response in v4, and thus
|
|
* align the READ data correctly. This means that the GETATTR
|
|
* may end up partially falling into the page cache, and we should
|
|
* shift it into the 'tail' of the xdr_buf before processing.
|
|
* To do this efficiently, we need to know the total length
|
|
* of data received, which doesn't seem to be available outside
|
|
* of the RPC layer.
|
|
*
|
|
* In the case of WRITE, we also want to put the GETATTR after
|
|
* the operation -- in this case because we want to make sure
|
|
* we get the post-operation mtime and size. This means that
|
|
* we can't use xdr_encode_pages() as written: we need a variant
|
|
* of it which would leave room in the 'tail' iovec.
|
|
*
|
|
* Both of these changes to the XDR layer would in fact be quite
|
|
* minor, but I decided to leave them for a subsequent patch.
|
|
*/
|
|
static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
|
|
unsigned int pgbase, unsigned int pglen)
|
|
{
|
|
struct nfs4_readlink args = {
|
|
.fh = NFS_FH(inode),
|
|
.pgbase = pgbase,
|
|
.pglen = pglen,
|
|
.pages = &page,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = NULL,
|
|
};
|
|
|
|
return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
|
|
}
|
|
|
|
static int nfs4_proc_readlink(struct inode *inode, struct page *page,
|
|
unsigned int pgbase, unsigned int pglen)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(NFS_SERVER(inode),
|
|
_nfs4_proc_readlink(inode, page, pgbase, pglen),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Got race?
|
|
* We will need to arrange for the VFS layer to provide an atomic open.
|
|
* Until then, this create/open method is prone to inefficiency and race
|
|
* conditions due to the lookup, create, and open VFS calls from sys_open()
|
|
* placed on the wire.
|
|
*
|
|
* Given the above sorry state of affairs, I'm simply sending an OPEN.
|
|
* The file will be opened again in the subsequent VFS open call
|
|
* (nfs4_proc_file_open).
|
|
*
|
|
* The open for read will just hang around to be used by any process that
|
|
* opens the file O_RDONLY. This will all be resolved with the VFS changes.
|
|
*/
|
|
|
|
static int
|
|
nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
|
|
int flags, struct nameidata *nd)
|
|
{
|
|
struct path path = {
|
|
.mnt = nd->path.mnt,
|
|
.dentry = dentry,
|
|
};
|
|
struct nfs4_state *state;
|
|
struct rpc_cred *cred;
|
|
int status = 0;
|
|
|
|
cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
|
|
if (IS_ERR(cred)) {
|
|
status = PTR_ERR(cred);
|
|
goto out;
|
|
}
|
|
state = nfs4_do_open(dir, &path, flags, sattr, cred);
|
|
put_rpccred(cred);
|
|
d_drop(dentry);
|
|
if (IS_ERR(state)) {
|
|
status = PTR_ERR(state);
|
|
goto out;
|
|
}
|
|
d_add(dentry, igrab(state->inode));
|
|
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
|
|
if (flags & O_EXCL) {
|
|
struct nfs_fattr fattr;
|
|
status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
|
|
if (status == 0)
|
|
nfs_setattr_update_inode(state->inode, sattr);
|
|
nfs_post_op_update_inode(state->inode, &fattr);
|
|
}
|
|
if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
|
|
status = nfs4_intent_set_file(nd, &path, state);
|
|
else
|
|
nfs4_close_sync(&path, state, flags);
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
struct nfs_removeargs args = {
|
|
.fh = NFS_FH(dir),
|
|
.name.len = name->len,
|
|
.name.name = name->name,
|
|
.bitmask = server->attr_bitmask,
|
|
};
|
|
struct nfs_removeres res = {
|
|
.server = server,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
};
|
|
int status;
|
|
|
|
nfs_fattr_init(&res.dir_attr);
|
|
status = rpc_call_sync(server->client, &msg, 0);
|
|
if (status == 0) {
|
|
update_changeattr(dir, &res.cinfo);
|
|
nfs_post_op_update_inode(dir, &res.dir_attr);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(NFS_SERVER(dir),
|
|
_nfs4_proc_remove(dir, name),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
struct nfs_removeargs *args = msg->rpc_argp;
|
|
struct nfs_removeres *res = msg->rpc_resp;
|
|
|
|
args->bitmask = server->attr_bitmask;
|
|
res->server = server;
|
|
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
|
|
}
|
|
|
|
static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
|
|
{
|
|
struct nfs_removeres *res = task->tk_msg.rpc_resp;
|
|
|
|
if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
|
|
return 0;
|
|
update_changeattr(dir, &res->cinfo);
|
|
nfs_post_op_update_inode(dir, &res->dir_attr);
|
|
return 1;
|
|
}
|
|
|
|
static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
|
|
struct inode *new_dir, struct qstr *new_name)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(old_dir);
|
|
struct nfs4_rename_arg arg = {
|
|
.old_dir = NFS_FH(old_dir),
|
|
.new_dir = NFS_FH(new_dir),
|
|
.old_name = old_name,
|
|
.new_name = new_name,
|
|
.bitmask = server->attr_bitmask,
|
|
};
|
|
struct nfs_fattr old_fattr, new_fattr;
|
|
struct nfs4_rename_res res = {
|
|
.server = server,
|
|
.old_fattr = &old_fattr,
|
|
.new_fattr = &new_fattr,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
};
|
|
int status;
|
|
|
|
nfs_fattr_init(res.old_fattr);
|
|
nfs_fattr_init(res.new_fattr);
|
|
status = rpc_call_sync(server->client, &msg, 0);
|
|
|
|
if (!status) {
|
|
update_changeattr(old_dir, &res.old_cinfo);
|
|
nfs_post_op_update_inode(old_dir, res.old_fattr);
|
|
update_changeattr(new_dir, &res.new_cinfo);
|
|
nfs_post_op_update_inode(new_dir, res.new_fattr);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
|
|
struct inode *new_dir, struct qstr *new_name)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(NFS_SERVER(old_dir),
|
|
_nfs4_proc_rename(old_dir, old_name,
|
|
new_dir, new_name),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs4_link_arg arg = {
|
|
.fh = NFS_FH(inode),
|
|
.dir_fh = NFS_FH(dir),
|
|
.name = name,
|
|
.bitmask = server->attr_bitmask,
|
|
};
|
|
struct nfs_fattr fattr, dir_attr;
|
|
struct nfs4_link_res res = {
|
|
.server = server,
|
|
.fattr = &fattr,
|
|
.dir_attr = &dir_attr,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
};
|
|
int status;
|
|
|
|
nfs_fattr_init(res.fattr);
|
|
nfs_fattr_init(res.dir_attr);
|
|
status = rpc_call_sync(server->client, &msg, 0);
|
|
if (!status) {
|
|
update_changeattr(dir, &res.cinfo);
|
|
nfs_post_op_update_inode(dir, res.dir_attr);
|
|
nfs_post_op_update_inode(inode, res.fattr);
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(NFS_SERVER(inode),
|
|
_nfs4_proc_link(inode, dir, name),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
|
|
struct page *page, unsigned int len, struct iattr *sattr)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
struct nfs_fh fhandle;
|
|
struct nfs_fattr fattr, dir_fattr;
|
|
struct nfs4_create_arg arg = {
|
|
.dir_fh = NFS_FH(dir),
|
|
.server = server,
|
|
.name = &dentry->d_name,
|
|
.attrs = sattr,
|
|
.ftype = NF4LNK,
|
|
.bitmask = server->attr_bitmask,
|
|
};
|
|
struct nfs4_create_res res = {
|
|
.server = server,
|
|
.fh = &fhandle,
|
|
.fattr = &fattr,
|
|
.dir_fattr = &dir_fattr,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
};
|
|
int status;
|
|
|
|
if (len > NFS4_MAXPATHLEN)
|
|
return -ENAMETOOLONG;
|
|
|
|
arg.u.symlink.pages = &page;
|
|
arg.u.symlink.len = len;
|
|
nfs_fattr_init(&fattr);
|
|
nfs_fattr_init(&dir_fattr);
|
|
|
|
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
|
|
if (!status) {
|
|
update_changeattr(dir, &res.dir_cinfo);
|
|
nfs_post_op_update_inode(dir, res.dir_fattr);
|
|
status = nfs_instantiate(dentry, &fhandle, &fattr);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
|
|
struct page *page, unsigned int len, struct iattr *sattr)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(NFS_SERVER(dir),
|
|
_nfs4_proc_symlink(dir, dentry, page,
|
|
len, sattr),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
|
|
struct iattr *sattr)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
struct nfs_fh fhandle;
|
|
struct nfs_fattr fattr, dir_fattr;
|
|
struct nfs4_create_arg arg = {
|
|
.dir_fh = NFS_FH(dir),
|
|
.server = server,
|
|
.name = &dentry->d_name,
|
|
.attrs = sattr,
|
|
.ftype = NF4DIR,
|
|
.bitmask = server->attr_bitmask,
|
|
};
|
|
struct nfs4_create_res res = {
|
|
.server = server,
|
|
.fh = &fhandle,
|
|
.fattr = &fattr,
|
|
.dir_fattr = &dir_fattr,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
};
|
|
int status;
|
|
|
|
nfs_fattr_init(&fattr);
|
|
nfs_fattr_init(&dir_fattr);
|
|
|
|
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
|
|
if (!status) {
|
|
update_changeattr(dir, &res.dir_cinfo);
|
|
nfs_post_op_update_inode(dir, res.dir_fattr);
|
|
status = nfs_instantiate(dentry, &fhandle, &fattr);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
|
|
struct iattr *sattr)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(NFS_SERVER(dir),
|
|
_nfs4_proc_mkdir(dir, dentry, sattr),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
|
|
u64 cookie, struct page *page, unsigned int count, int plus)
|
|
{
|
|
struct inode *dir = dentry->d_inode;
|
|
struct nfs4_readdir_arg args = {
|
|
.fh = NFS_FH(dir),
|
|
.pages = &page,
|
|
.pgbase = 0,
|
|
.count = count,
|
|
.bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
|
|
};
|
|
struct nfs4_readdir_res res;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &res,
|
|
.rpc_cred = cred,
|
|
};
|
|
int status;
|
|
|
|
dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
|
|
dentry->d_parent->d_name.name,
|
|
dentry->d_name.name,
|
|
(unsigned long long)cookie);
|
|
nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
|
|
res.pgbase = args.pgbase;
|
|
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
|
|
if (status == 0)
|
|
memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
|
|
|
|
nfs_invalidate_atime(dir);
|
|
|
|
dprintk("%s: returns %d\n", __FUNCTION__, status);
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
|
|
u64 cookie, struct page *page, unsigned int count, int plus)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
|
|
_nfs4_proc_readdir(dentry, cred, cookie,
|
|
page, count, plus),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
|
|
struct iattr *sattr, dev_t rdev)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
struct nfs_fh fh;
|
|
struct nfs_fattr fattr, dir_fattr;
|
|
struct nfs4_create_arg arg = {
|
|
.dir_fh = NFS_FH(dir),
|
|
.server = server,
|
|
.name = &dentry->d_name,
|
|
.attrs = sattr,
|
|
.bitmask = server->attr_bitmask,
|
|
};
|
|
struct nfs4_create_res res = {
|
|
.server = server,
|
|
.fh = &fh,
|
|
.fattr = &fattr,
|
|
.dir_fattr = &dir_fattr,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
};
|
|
int status;
|
|
int mode = sattr->ia_mode;
|
|
|
|
nfs_fattr_init(&fattr);
|
|
nfs_fattr_init(&dir_fattr);
|
|
|
|
BUG_ON(!(sattr->ia_valid & ATTR_MODE));
|
|
BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
|
|
if (S_ISFIFO(mode))
|
|
arg.ftype = NF4FIFO;
|
|
else if (S_ISBLK(mode)) {
|
|
arg.ftype = NF4BLK;
|
|
arg.u.device.specdata1 = MAJOR(rdev);
|
|
arg.u.device.specdata2 = MINOR(rdev);
|
|
}
|
|
else if (S_ISCHR(mode)) {
|
|
arg.ftype = NF4CHR;
|
|
arg.u.device.specdata1 = MAJOR(rdev);
|
|
arg.u.device.specdata2 = MINOR(rdev);
|
|
}
|
|
else
|
|
arg.ftype = NF4SOCK;
|
|
|
|
status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
|
|
if (status == 0) {
|
|
update_changeattr(dir, &res.dir_cinfo);
|
|
nfs_post_op_update_inode(dir, res.dir_fattr);
|
|
status = nfs_instantiate(dentry, &fh, &fattr);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
|
|
struct iattr *sattr, dev_t rdev)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(NFS_SERVER(dir),
|
|
_nfs4_proc_mknod(dir, dentry, sattr, rdev),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fsstat *fsstat)
|
|
{
|
|
struct nfs4_statfs_arg args = {
|
|
.fh = fhandle,
|
|
.bitmask = server->attr_bitmask,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = fsstat,
|
|
};
|
|
|
|
nfs_fattr_init(fsstat->fattr);
|
|
return rpc_call_sync(server->client, &msg, 0);
|
|
}
|
|
|
|
static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(server,
|
|
_nfs4_proc_statfs(server, fhandle, fsstat),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_fsinfo *fsinfo)
|
|
{
|
|
struct nfs4_fsinfo_arg args = {
|
|
.fh = fhandle,
|
|
.bitmask = server->attr_bitmask,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = fsinfo,
|
|
};
|
|
|
|
return rpc_call_sync(server->client, &msg, 0);
|
|
}
|
|
|
|
static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
|
|
do {
|
|
err = nfs4_handle_exception(server,
|
|
_nfs4_do_fsinfo(server, fhandle, fsinfo),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
|
|
{
|
|
nfs_fattr_init(fsinfo->fattr);
|
|
return nfs4_do_fsinfo(server, fhandle, fsinfo);
|
|
}
|
|
|
|
static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_pathconf *pathconf)
|
|
{
|
|
struct nfs4_pathconf_arg args = {
|
|
.fh = fhandle,
|
|
.bitmask = server->attr_bitmask,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = pathconf,
|
|
};
|
|
|
|
/* None of the pathconf attributes are mandatory to implement */
|
|
if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
|
|
memset(pathconf, 0, sizeof(*pathconf));
|
|
return 0;
|
|
}
|
|
|
|
nfs_fattr_init(pathconf->fattr);
|
|
return rpc_call_sync(server->client, &msg, 0);
|
|
}
|
|
|
|
static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
|
|
struct nfs_pathconf *pathconf)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
|
|
do {
|
|
err = nfs4_handle_exception(server,
|
|
_nfs4_proc_pathconf(server, fhandle, pathconf),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(data->inode);
|
|
|
|
if (nfs4_async_handle_error(task, server) == -EAGAIN) {
|
|
rpc_restart_call(task);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
nfs_invalidate_atime(data->inode);
|
|
if (task->tk_status > 0)
|
|
renew_lease(server, data->timestamp);
|
|
return 0;
|
|
}
|
|
|
|
static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
|
|
{
|
|
data->timestamp = jiffies;
|
|
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
|
|
}
|
|
|
|
static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
|
|
{
|
|
struct inode *inode = data->inode;
|
|
|
|
if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
|
|
rpc_restart_call(task);
|
|
return -EAGAIN;
|
|
}
|
|
if (task->tk_status >= 0) {
|
|
renew_lease(NFS_SERVER(inode), data->timestamp);
|
|
nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(data->inode);
|
|
|
|
data->args.bitmask = server->attr_bitmask;
|
|
data->res.server = server;
|
|
data->timestamp = jiffies;
|
|
|
|
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
|
|
}
|
|
|
|
static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
|
|
{
|
|
struct inode *inode = data->inode;
|
|
|
|
if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
|
|
rpc_restart_call(task);
|
|
return -EAGAIN;
|
|
}
|
|
nfs_refresh_inode(inode, data->res.fattr);
|
|
return 0;
|
|
}
|
|
|
|
static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(data->inode);
|
|
|
|
data->args.bitmask = server->attr_bitmask;
|
|
data->res.server = server;
|
|
msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
|
|
}
|
|
|
|
/*
|
|
* nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
|
|
* standalone procedure for queueing an asynchronous RENEW.
|
|
*/
|
|
static void nfs4_renew_done(struct rpc_task *task, void *data)
|
|
{
|
|
struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
|
|
unsigned long timestamp = (unsigned long)data;
|
|
|
|
if (task->tk_status < 0) {
|
|
switch (task->tk_status) {
|
|
case -NFS4ERR_STALE_CLIENTID:
|
|
case -NFS4ERR_EXPIRED:
|
|
case -NFS4ERR_CB_PATH_DOWN:
|
|
nfs4_schedule_state_recovery(clp);
|
|
}
|
|
return;
|
|
}
|
|
spin_lock(&clp->cl_lock);
|
|
if (time_before(clp->cl_last_renewal,timestamp))
|
|
clp->cl_last_renewal = timestamp;
|
|
spin_unlock(&clp->cl_lock);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_renew_ops = {
|
|
.rpc_call_done = nfs4_renew_done,
|
|
};
|
|
|
|
int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
|
|
{
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
|
|
.rpc_argp = clp,
|
|
.rpc_cred = cred,
|
|
};
|
|
|
|
return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
|
|
&nfs4_renew_ops, (void *)jiffies);
|
|
}
|
|
|
|
int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
|
|
{
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
|
|
.rpc_argp = clp,
|
|
.rpc_cred = cred,
|
|
};
|
|
unsigned long now = jiffies;
|
|
int status;
|
|
|
|
status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
|
|
if (status < 0)
|
|
return status;
|
|
spin_lock(&clp->cl_lock);
|
|
if (time_before(clp->cl_last_renewal,now))
|
|
clp->cl_last_renewal = now;
|
|
spin_unlock(&clp->cl_lock);
|
|
return 0;
|
|
}
|
|
|
|
static inline int nfs4_server_supports_acls(struct nfs_server *server)
|
|
{
|
|
return (server->caps & NFS_CAP_ACLS)
|
|
&& (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
|
|
&& (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
|
|
}
|
|
|
|
/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
|
|
* it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
|
|
* the stack.
|
|
*/
|
|
#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
|
|
|
|
static void buf_to_pages(const void *buf, size_t buflen,
|
|
struct page **pages, unsigned int *pgbase)
|
|
{
|
|
const void *p = buf;
|
|
|
|
*pgbase = offset_in_page(buf);
|
|
p -= *pgbase;
|
|
while (p < buf + buflen) {
|
|
*(pages++) = virt_to_page(p);
|
|
p += PAGE_CACHE_SIZE;
|
|
}
|
|
}
|
|
|
|
struct nfs4_cached_acl {
|
|
int cached;
|
|
size_t len;
|
|
char data[0];
|
|
};
|
|
|
|
static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
|
|
spin_lock(&inode->i_lock);
|
|
kfree(nfsi->nfs4_acl);
|
|
nfsi->nfs4_acl = acl;
|
|
spin_unlock(&inode->i_lock);
|
|
}
|
|
|
|
static void nfs4_zap_acl_attr(struct inode *inode)
|
|
{
|
|
nfs4_set_cached_acl(inode, NULL);
|
|
}
|
|
|
|
static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
|
|
{
|
|
struct nfs_inode *nfsi = NFS_I(inode);
|
|
struct nfs4_cached_acl *acl;
|
|
int ret = -ENOENT;
|
|
|
|
spin_lock(&inode->i_lock);
|
|
acl = nfsi->nfs4_acl;
|
|
if (acl == NULL)
|
|
goto out;
|
|
if (buf == NULL) /* user is just asking for length */
|
|
goto out_len;
|
|
if (acl->cached == 0)
|
|
goto out;
|
|
ret = -ERANGE; /* see getxattr(2) man page */
|
|
if (acl->len > buflen)
|
|
goto out;
|
|
memcpy(buf, acl->data, acl->len);
|
|
out_len:
|
|
ret = acl->len;
|
|
out:
|
|
spin_unlock(&inode->i_lock);
|
|
return ret;
|
|
}
|
|
|
|
static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
|
|
{
|
|
struct nfs4_cached_acl *acl;
|
|
|
|
if (buf && acl_len <= PAGE_SIZE) {
|
|
acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
|
|
if (acl == NULL)
|
|
goto out;
|
|
acl->cached = 1;
|
|
memcpy(acl->data, buf, acl_len);
|
|
} else {
|
|
acl = kmalloc(sizeof(*acl), GFP_KERNEL);
|
|
if (acl == NULL)
|
|
goto out;
|
|
acl->cached = 0;
|
|
}
|
|
acl->len = acl_len;
|
|
out:
|
|
nfs4_set_cached_acl(inode, acl);
|
|
}
|
|
|
|
static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
|
|
{
|
|
struct page *pages[NFS4ACL_MAXPAGES];
|
|
struct nfs_getaclargs args = {
|
|
.fh = NFS_FH(inode),
|
|
.acl_pages = pages,
|
|
.acl_len = buflen,
|
|
};
|
|
size_t resp_len = buflen;
|
|
void *resp_buf;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = &resp_len,
|
|
};
|
|
struct page *localpage = NULL;
|
|
int ret;
|
|
|
|
if (buflen < PAGE_SIZE) {
|
|
/* As long as we're doing a round trip to the server anyway,
|
|
* let's be prepared for a page of acl data. */
|
|
localpage = alloc_page(GFP_KERNEL);
|
|
resp_buf = page_address(localpage);
|
|
if (localpage == NULL)
|
|
return -ENOMEM;
|
|
args.acl_pages[0] = localpage;
|
|
args.acl_pgbase = 0;
|
|
resp_len = args.acl_len = PAGE_SIZE;
|
|
} else {
|
|
resp_buf = buf;
|
|
buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
|
|
}
|
|
ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
|
|
if (ret)
|
|
goto out_free;
|
|
if (resp_len > args.acl_len)
|
|
nfs4_write_cached_acl(inode, NULL, resp_len);
|
|
else
|
|
nfs4_write_cached_acl(inode, resp_buf, resp_len);
|
|
if (buf) {
|
|
ret = -ERANGE;
|
|
if (resp_len > buflen)
|
|
goto out_free;
|
|
if (localpage)
|
|
memcpy(buf, resp_buf, resp_len);
|
|
}
|
|
ret = resp_len;
|
|
out_free:
|
|
if (localpage)
|
|
__free_page(localpage);
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
ssize_t ret;
|
|
do {
|
|
ret = __nfs4_get_acl_uncached(inode, buf, buflen);
|
|
if (ret >= 0)
|
|
break;
|
|
ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
|
|
} while (exception.retry);
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
int ret;
|
|
|
|
if (!nfs4_server_supports_acls(server))
|
|
return -EOPNOTSUPP;
|
|
ret = nfs_revalidate_inode(server, inode);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = nfs4_read_cached_acl(inode, buf, buflen);
|
|
if (ret != -ENOENT)
|
|
return ret;
|
|
return nfs4_get_acl_uncached(inode, buf, buflen);
|
|
}
|
|
|
|
static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct page *pages[NFS4ACL_MAXPAGES];
|
|
struct nfs_setaclargs arg = {
|
|
.fh = NFS_FH(inode),
|
|
.acl_pages = pages,
|
|
.acl_len = buflen,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = NULL,
|
|
};
|
|
int ret;
|
|
|
|
if (!nfs4_server_supports_acls(server))
|
|
return -EOPNOTSUPP;
|
|
nfs_inode_return_delegation(inode);
|
|
buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
|
|
ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
|
|
nfs_zap_caches(inode);
|
|
return ret;
|
|
}
|
|
|
|
static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = nfs4_handle_exception(NFS_SERVER(inode),
|
|
__nfs4_proc_set_acl(inode, buf, buflen),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
|
|
{
|
|
struct nfs_client *clp = server->nfs_client;
|
|
|
|
if (!clp || task->tk_status >= 0)
|
|
return 0;
|
|
switch(task->tk_status) {
|
|
case -NFS4ERR_STALE_CLIENTID:
|
|
case -NFS4ERR_STALE_STATEID:
|
|
case -NFS4ERR_EXPIRED:
|
|
rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
|
|
nfs4_schedule_state_recovery(clp);
|
|
if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
|
|
rpc_wake_up_task(task);
|
|
task->tk_status = 0;
|
|
return -EAGAIN;
|
|
case -NFS4ERR_DELAY:
|
|
nfs_inc_server_stats((struct nfs_server *) server,
|
|
NFSIOS_DELAY);
|
|
case -NFS4ERR_GRACE:
|
|
rpc_delay(task, NFS4_POLL_RETRY_MAX);
|
|
task->tk_status = 0;
|
|
return -EAGAIN;
|
|
case -NFS4ERR_OLD_STATEID:
|
|
task->tk_status = 0;
|
|
return -EAGAIN;
|
|
}
|
|
task->tk_status = nfs4_map_errors(task->tk_status);
|
|
return 0;
|
|
}
|
|
|
|
static int nfs4_wait_bit_killable(void *word)
|
|
{
|
|
if (fatal_signal_pending(current))
|
|
return -ERESTARTSYS;
|
|
schedule();
|
|
return 0;
|
|
}
|
|
|
|
static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
|
|
{
|
|
int res;
|
|
|
|
might_sleep();
|
|
|
|
rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
|
|
|
|
res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
|
|
nfs4_wait_bit_killable, TASK_KILLABLE);
|
|
|
|
rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
|
|
return res;
|
|
}
|
|
|
|
static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
|
|
{
|
|
int res = 0;
|
|
|
|
might_sleep();
|
|
|
|
if (*timeout <= 0)
|
|
*timeout = NFS4_POLL_RETRY_MIN;
|
|
if (*timeout > NFS4_POLL_RETRY_MAX)
|
|
*timeout = NFS4_POLL_RETRY_MAX;
|
|
schedule_timeout_killable(*timeout);
|
|
if (fatal_signal_pending(current))
|
|
res = -ERESTARTSYS;
|
|
*timeout <<= 1;
|
|
return res;
|
|
}
|
|
|
|
/* This is the error handling routine for processes that are allowed
|
|
* to sleep.
|
|
*/
|
|
static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
|
|
{
|
|
struct nfs_client *clp = server->nfs_client;
|
|
int ret = errorcode;
|
|
|
|
exception->retry = 0;
|
|
switch(errorcode) {
|
|
case 0:
|
|
return 0;
|
|
case -NFS4ERR_STALE_CLIENTID:
|
|
case -NFS4ERR_STALE_STATEID:
|
|
case -NFS4ERR_EXPIRED:
|
|
nfs4_schedule_state_recovery(clp);
|
|
ret = nfs4_wait_clnt_recover(server->client, clp);
|
|
if (ret == 0)
|
|
exception->retry = 1;
|
|
break;
|
|
case -NFS4ERR_FILE_OPEN:
|
|
case -NFS4ERR_GRACE:
|
|
case -NFS4ERR_DELAY:
|
|
ret = nfs4_delay(server->client, &exception->timeout);
|
|
if (ret != 0)
|
|
break;
|
|
case -NFS4ERR_OLD_STATEID:
|
|
exception->retry = 1;
|
|
}
|
|
/* We failed to handle the error */
|
|
return nfs4_map_errors(ret);
|
|
}
|
|
|
|
int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
|
|
{
|
|
nfs4_verifier sc_verifier;
|
|
struct nfs4_setclientid setclientid = {
|
|
.sc_verifier = &sc_verifier,
|
|
.sc_prog = program,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
|
|
.rpc_argp = &setclientid,
|
|
.rpc_resp = clp,
|
|
.rpc_cred = cred,
|
|
};
|
|
__be32 *p;
|
|
int loop = 0;
|
|
int status;
|
|
|
|
p = (__be32*)sc_verifier.data;
|
|
*p++ = htonl((u32)clp->cl_boot_time.tv_sec);
|
|
*p = htonl((u32)clp->cl_boot_time.tv_nsec);
|
|
|
|
for(;;) {
|
|
setclientid.sc_name_len = scnprintf(setclientid.sc_name,
|
|
sizeof(setclientid.sc_name), "%s/%s %s %s %u",
|
|
clp->cl_ipaddr,
|
|
rpc_peeraddr2str(clp->cl_rpcclient,
|
|
RPC_DISPLAY_ADDR),
|
|
rpc_peeraddr2str(clp->cl_rpcclient,
|
|
RPC_DISPLAY_PROTO),
|
|
cred->cr_ops->cr_name,
|
|
clp->cl_id_uniquifier);
|
|
setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
|
|
sizeof(setclientid.sc_netid),
|
|
rpc_peeraddr2str(clp->cl_rpcclient,
|
|
RPC_DISPLAY_NETID));
|
|
setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
|
|
sizeof(setclientid.sc_uaddr), "%s.%u.%u",
|
|
clp->cl_ipaddr, port >> 8, port & 255);
|
|
|
|
status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
|
|
if (status != -NFS4ERR_CLID_INUSE)
|
|
break;
|
|
if (signalled())
|
|
break;
|
|
if (loop++ & 1)
|
|
ssleep(clp->cl_lease_time + 1);
|
|
else
|
|
if (++clp->cl_id_uniquifier == 0)
|
|
break;
|
|
}
|
|
return status;
|
|
}
|
|
|
|
static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
|
|
{
|
|
struct nfs_fsinfo fsinfo;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
|
|
.rpc_argp = clp,
|
|
.rpc_resp = &fsinfo,
|
|
.rpc_cred = cred,
|
|
};
|
|
unsigned long now;
|
|
int status;
|
|
|
|
now = jiffies;
|
|
status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
|
|
if (status == 0) {
|
|
spin_lock(&clp->cl_lock);
|
|
clp->cl_lease_time = fsinfo.lease_time * HZ;
|
|
clp->cl_last_renewal = now;
|
|
clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
|
|
spin_unlock(&clp->cl_lock);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
|
|
{
|
|
long timeout;
|
|
int err;
|
|
do {
|
|
err = _nfs4_proc_setclientid_confirm(clp, cred);
|
|
switch (err) {
|
|
case 0:
|
|
return err;
|
|
case -NFS4ERR_RESOURCE:
|
|
/* The IBM lawyers misread another document! */
|
|
case -NFS4ERR_DELAY:
|
|
err = nfs4_delay(clp->cl_rpcclient, &timeout);
|
|
}
|
|
} while (err == 0);
|
|
return err;
|
|
}
|
|
|
|
struct nfs4_delegreturndata {
|
|
struct nfs4_delegreturnargs args;
|
|
struct nfs4_delegreturnres res;
|
|
struct nfs_fh fh;
|
|
nfs4_stateid stateid;
|
|
unsigned long timestamp;
|
|
struct nfs_fattr fattr;
|
|
int rpc_status;
|
|
};
|
|
|
|
static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_delegreturndata *data = calldata;
|
|
data->rpc_status = task->tk_status;
|
|
if (data->rpc_status == 0)
|
|
renew_lease(data->res.server, data->timestamp);
|
|
}
|
|
|
|
static void nfs4_delegreturn_release(void *calldata)
|
|
{
|
|
kfree(calldata);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_delegreturn_ops = {
|
|
.rpc_call_done = nfs4_delegreturn_done,
|
|
.rpc_release = nfs4_delegreturn_release,
|
|
};
|
|
|
|
static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
|
|
{
|
|
struct nfs4_delegreturndata *data;
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct rpc_task *task;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
|
|
.rpc_cred = cred,
|
|
};
|
|
struct rpc_task_setup task_setup_data = {
|
|
.rpc_client = server->client,
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs4_delegreturn_ops,
|
|
.flags = RPC_TASK_ASYNC,
|
|
};
|
|
int status = 0;
|
|
|
|
data = kmalloc(sizeof(*data), GFP_KERNEL);
|
|
if (data == NULL)
|
|
return -ENOMEM;
|
|
data->args.fhandle = &data->fh;
|
|
data->args.stateid = &data->stateid;
|
|
data->args.bitmask = server->attr_bitmask;
|
|
nfs_copy_fh(&data->fh, NFS_FH(inode));
|
|
memcpy(&data->stateid, stateid, sizeof(data->stateid));
|
|
data->res.fattr = &data->fattr;
|
|
data->res.server = server;
|
|
nfs_fattr_init(data->res.fattr);
|
|
data->timestamp = jiffies;
|
|
data->rpc_status = 0;
|
|
|
|
task_setup_data.callback_data = data;
|
|
msg.rpc_argp = &data->args,
|
|
msg.rpc_resp = &data->res,
|
|
task = rpc_run_task(&task_setup_data);
|
|
if (IS_ERR(task))
|
|
return PTR_ERR(task);
|
|
if (!issync)
|
|
goto out;
|
|
status = nfs4_wait_for_completion_rpc_task(task);
|
|
if (status != 0)
|
|
goto out;
|
|
status = data->rpc_status;
|
|
if (status != 0)
|
|
goto out;
|
|
nfs_refresh_inode(inode, &data->fattr);
|
|
out:
|
|
rpc_put_task(task);
|
|
return status;
|
|
}
|
|
|
|
int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
do {
|
|
err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
|
|
switch (err) {
|
|
case -NFS4ERR_STALE_STATEID:
|
|
case -NFS4ERR_EXPIRED:
|
|
case 0:
|
|
return 0;
|
|
}
|
|
err = nfs4_handle_exception(server, err, &exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
|
|
#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
|
|
|
|
/*
|
|
* sleep, with exponential backoff, and retry the LOCK operation.
|
|
*/
|
|
static unsigned long
|
|
nfs4_set_lock_task_retry(unsigned long timeout)
|
|
{
|
|
schedule_timeout_killable(timeout);
|
|
timeout <<= 1;
|
|
if (timeout > NFS4_LOCK_MAXTIMEOUT)
|
|
return NFS4_LOCK_MAXTIMEOUT;
|
|
return timeout;
|
|
}
|
|
|
|
static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
|
|
{
|
|
struct inode *inode = state->inode;
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
struct nfs_client *clp = server->nfs_client;
|
|
struct nfs_lockt_args arg = {
|
|
.fh = NFS_FH(inode),
|
|
.fl = request,
|
|
};
|
|
struct nfs_lockt_res res = {
|
|
.denied = request,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
|
|
.rpc_argp = &arg,
|
|
.rpc_resp = &res,
|
|
.rpc_cred = state->owner->so_cred,
|
|
};
|
|
struct nfs4_lock_state *lsp;
|
|
int status;
|
|
|
|
down_read(&clp->cl_sem);
|
|
arg.lock_owner.clientid = clp->cl_clientid;
|
|
status = nfs4_set_lock_state(state, request);
|
|
if (status != 0)
|
|
goto out;
|
|
lsp = request->fl_u.nfs4_fl.owner;
|
|
arg.lock_owner.id = lsp->ls_id.id;
|
|
status = rpc_call_sync(server->client, &msg, 0);
|
|
switch (status) {
|
|
case 0:
|
|
request->fl_type = F_UNLCK;
|
|
break;
|
|
case -NFS4ERR_DENIED:
|
|
status = 0;
|
|
}
|
|
request->fl_ops->fl_release_private(request);
|
|
out:
|
|
up_read(&clp->cl_sem);
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
|
|
do {
|
|
err = nfs4_handle_exception(NFS_SERVER(state->inode),
|
|
_nfs4_proc_getlk(state, cmd, request),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int do_vfs_lock(struct file *file, struct file_lock *fl)
|
|
{
|
|
int res = 0;
|
|
switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
|
|
case FL_POSIX:
|
|
res = posix_lock_file_wait(file, fl);
|
|
break;
|
|
case FL_FLOCK:
|
|
res = flock_lock_file_wait(file, fl);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
return res;
|
|
}
|
|
|
|
struct nfs4_unlockdata {
|
|
struct nfs_locku_args arg;
|
|
struct nfs_locku_res res;
|
|
struct nfs4_lock_state *lsp;
|
|
struct nfs_open_context *ctx;
|
|
struct file_lock fl;
|
|
const struct nfs_server *server;
|
|
unsigned long timestamp;
|
|
};
|
|
|
|
static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
|
|
struct nfs_open_context *ctx,
|
|
struct nfs4_lock_state *lsp,
|
|
struct nfs_seqid *seqid)
|
|
{
|
|
struct nfs4_unlockdata *p;
|
|
struct inode *inode = lsp->ls_state->inode;
|
|
|
|
p = kmalloc(sizeof(*p), GFP_KERNEL);
|
|
if (p == NULL)
|
|
return NULL;
|
|
p->arg.fh = NFS_FH(inode);
|
|
p->arg.fl = &p->fl;
|
|
p->arg.seqid = seqid;
|
|
p->arg.stateid = &lsp->ls_stateid;
|
|
p->lsp = lsp;
|
|
atomic_inc(&lsp->ls_count);
|
|
/* Ensure we don't close file until we're done freeing locks! */
|
|
p->ctx = get_nfs_open_context(ctx);
|
|
memcpy(&p->fl, fl, sizeof(p->fl));
|
|
p->server = NFS_SERVER(inode);
|
|
return p;
|
|
}
|
|
|
|
static void nfs4_locku_release_calldata(void *data)
|
|
{
|
|
struct nfs4_unlockdata *calldata = data;
|
|
nfs_free_seqid(calldata->arg.seqid);
|
|
nfs4_put_lock_state(calldata->lsp);
|
|
put_nfs_open_context(calldata->ctx);
|
|
kfree(calldata);
|
|
}
|
|
|
|
static void nfs4_locku_done(struct rpc_task *task, void *data)
|
|
{
|
|
struct nfs4_unlockdata *calldata = data;
|
|
|
|
if (RPC_ASSASSINATED(task))
|
|
return;
|
|
nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
|
|
switch (task->tk_status) {
|
|
case 0:
|
|
memcpy(calldata->lsp->ls_stateid.data,
|
|
calldata->res.stateid.data,
|
|
sizeof(calldata->lsp->ls_stateid.data));
|
|
renew_lease(calldata->server, calldata->timestamp);
|
|
break;
|
|
case -NFS4ERR_STALE_STATEID:
|
|
case -NFS4ERR_EXPIRED:
|
|
break;
|
|
default:
|
|
if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
|
|
rpc_restart_call(task);
|
|
}
|
|
}
|
|
|
|
static void nfs4_locku_prepare(struct rpc_task *task, void *data)
|
|
{
|
|
struct nfs4_unlockdata *calldata = data;
|
|
|
|
if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
|
|
return;
|
|
if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
|
|
/* Note: exit _without_ running nfs4_locku_done */
|
|
task->tk_action = NULL;
|
|
return;
|
|
}
|
|
calldata->timestamp = jiffies;
|
|
rpc_call_start(task);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_locku_ops = {
|
|
.rpc_call_prepare = nfs4_locku_prepare,
|
|
.rpc_call_done = nfs4_locku_done,
|
|
.rpc_release = nfs4_locku_release_calldata,
|
|
};
|
|
|
|
static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
|
|
struct nfs_open_context *ctx,
|
|
struct nfs4_lock_state *lsp,
|
|
struct nfs_seqid *seqid)
|
|
{
|
|
struct nfs4_unlockdata *data;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
|
|
.rpc_cred = ctx->cred,
|
|
};
|
|
struct rpc_task_setup task_setup_data = {
|
|
.rpc_client = NFS_CLIENT(lsp->ls_state->inode),
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs4_locku_ops,
|
|
.flags = RPC_TASK_ASYNC,
|
|
};
|
|
|
|
/* Ensure this is an unlock - when canceling a lock, the
|
|
* canceled lock is passed in, and it won't be an unlock.
|
|
*/
|
|
fl->fl_type = F_UNLCK;
|
|
|
|
data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
|
|
if (data == NULL) {
|
|
nfs_free_seqid(seqid);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
msg.rpc_argp = &data->arg,
|
|
msg.rpc_resp = &data->res,
|
|
task_setup_data.callback_data = data;
|
|
return rpc_run_task(&task_setup_data);
|
|
}
|
|
|
|
static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
|
|
{
|
|
struct nfs_seqid *seqid;
|
|
struct nfs4_lock_state *lsp;
|
|
struct rpc_task *task;
|
|
int status = 0;
|
|
|
|
status = nfs4_set_lock_state(state, request);
|
|
/* Unlock _before_ we do the RPC call */
|
|
request->fl_flags |= FL_EXISTS;
|
|
if (do_vfs_lock(request->fl_file, request) == -ENOENT)
|
|
goto out;
|
|
if (status != 0)
|
|
goto out;
|
|
/* Is this a delegated lock? */
|
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags))
|
|
goto out;
|
|
lsp = request->fl_u.nfs4_fl.owner;
|
|
seqid = nfs_alloc_seqid(&lsp->ls_seqid);
|
|
status = -ENOMEM;
|
|
if (seqid == NULL)
|
|
goto out;
|
|
task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
|
|
status = PTR_ERR(task);
|
|
if (IS_ERR(task))
|
|
goto out;
|
|
status = nfs4_wait_for_completion_rpc_task(task);
|
|
rpc_put_task(task);
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
struct nfs4_lockdata {
|
|
struct nfs_lock_args arg;
|
|
struct nfs_lock_res res;
|
|
struct nfs4_lock_state *lsp;
|
|
struct nfs_open_context *ctx;
|
|
struct file_lock fl;
|
|
unsigned long timestamp;
|
|
int rpc_status;
|
|
int cancelled;
|
|
};
|
|
|
|
static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
|
|
struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
|
|
{
|
|
struct nfs4_lockdata *p;
|
|
struct inode *inode = lsp->ls_state->inode;
|
|
struct nfs_server *server = NFS_SERVER(inode);
|
|
|
|
p = kzalloc(sizeof(*p), GFP_KERNEL);
|
|
if (p == NULL)
|
|
return NULL;
|
|
|
|
p->arg.fh = NFS_FH(inode);
|
|
p->arg.fl = &p->fl;
|
|
p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
|
|
if (p->arg.open_seqid == NULL)
|
|
goto out_free;
|
|
p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
|
|
if (p->arg.lock_seqid == NULL)
|
|
goto out_free_seqid;
|
|
p->arg.lock_stateid = &lsp->ls_stateid;
|
|
p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
|
|
p->arg.lock_owner.id = lsp->ls_id.id;
|
|
p->lsp = lsp;
|
|
atomic_inc(&lsp->ls_count);
|
|
p->ctx = get_nfs_open_context(ctx);
|
|
memcpy(&p->fl, fl, sizeof(p->fl));
|
|
return p;
|
|
out_free_seqid:
|
|
nfs_free_seqid(p->arg.open_seqid);
|
|
out_free:
|
|
kfree(p);
|
|
return NULL;
|
|
}
|
|
|
|
static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_lockdata *data = calldata;
|
|
struct nfs4_state *state = data->lsp->ls_state;
|
|
|
|
dprintk("%s: begin!\n", __FUNCTION__);
|
|
if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
|
|
return;
|
|
/* Do we need to do an open_to_lock_owner? */
|
|
if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
|
|
if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
|
|
return;
|
|
data->arg.open_stateid = &state->stateid;
|
|
data->arg.new_lock_owner = 1;
|
|
} else
|
|
data->arg.new_lock_owner = 0;
|
|
data->timestamp = jiffies;
|
|
rpc_call_start(task);
|
|
dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
|
|
}
|
|
|
|
static void nfs4_lock_done(struct rpc_task *task, void *calldata)
|
|
{
|
|
struct nfs4_lockdata *data = calldata;
|
|
|
|
dprintk("%s: begin!\n", __FUNCTION__);
|
|
|
|
data->rpc_status = task->tk_status;
|
|
if (RPC_ASSASSINATED(task))
|
|
goto out;
|
|
if (data->arg.new_lock_owner != 0) {
|
|
nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
|
|
if (data->rpc_status == 0)
|
|
nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
|
|
else
|
|
goto out;
|
|
}
|
|
if (data->rpc_status == 0) {
|
|
memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
|
|
sizeof(data->lsp->ls_stateid.data));
|
|
data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
|
|
renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
|
|
}
|
|
nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
|
|
out:
|
|
dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
|
|
}
|
|
|
|
static void nfs4_lock_release(void *calldata)
|
|
{
|
|
struct nfs4_lockdata *data = calldata;
|
|
|
|
dprintk("%s: begin!\n", __FUNCTION__);
|
|
nfs_free_seqid(data->arg.open_seqid);
|
|
if (data->cancelled != 0) {
|
|
struct rpc_task *task;
|
|
task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
|
|
data->arg.lock_seqid);
|
|
if (!IS_ERR(task))
|
|
rpc_put_task(task);
|
|
dprintk("%s: cancelling lock!\n", __FUNCTION__);
|
|
} else
|
|
nfs_free_seqid(data->arg.lock_seqid);
|
|
nfs4_put_lock_state(data->lsp);
|
|
put_nfs_open_context(data->ctx);
|
|
kfree(data);
|
|
dprintk("%s: done!\n", __FUNCTION__);
|
|
}
|
|
|
|
static const struct rpc_call_ops nfs4_lock_ops = {
|
|
.rpc_call_prepare = nfs4_lock_prepare,
|
|
.rpc_call_done = nfs4_lock_done,
|
|
.rpc_release = nfs4_lock_release,
|
|
};
|
|
|
|
static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
|
|
{
|
|
struct nfs4_lockdata *data;
|
|
struct rpc_task *task;
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
|
|
.rpc_cred = state->owner->so_cred,
|
|
};
|
|
struct rpc_task_setup task_setup_data = {
|
|
.rpc_client = NFS_CLIENT(state->inode),
|
|
.rpc_message = &msg,
|
|
.callback_ops = &nfs4_lock_ops,
|
|
.flags = RPC_TASK_ASYNC,
|
|
};
|
|
int ret;
|
|
|
|
dprintk("%s: begin!\n", __FUNCTION__);
|
|
data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
|
|
fl->fl_u.nfs4_fl.owner);
|
|
if (data == NULL)
|
|
return -ENOMEM;
|
|
if (IS_SETLKW(cmd))
|
|
data->arg.block = 1;
|
|
if (reclaim != 0)
|
|
data->arg.reclaim = 1;
|
|
msg.rpc_argp = &data->arg,
|
|
msg.rpc_resp = &data->res,
|
|
task_setup_data.callback_data = data;
|
|
task = rpc_run_task(&task_setup_data);
|
|
if (IS_ERR(task))
|
|
return PTR_ERR(task);
|
|
ret = nfs4_wait_for_completion_rpc_task(task);
|
|
if (ret == 0) {
|
|
ret = data->rpc_status;
|
|
if (ret == -NFS4ERR_DENIED)
|
|
ret = -EAGAIN;
|
|
} else
|
|
data->cancelled = 1;
|
|
rpc_put_task(task);
|
|
dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
|
|
return ret;
|
|
}
|
|
|
|
static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(state->inode);
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
|
|
do {
|
|
/* Cache the lock if possible... */
|
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
|
|
return 0;
|
|
err = _nfs4_do_setlk(state, F_SETLK, request, 1);
|
|
if (err != -NFS4ERR_DELAY)
|
|
break;
|
|
nfs4_handle_exception(server, err, &exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(state->inode);
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
|
|
err = nfs4_set_lock_state(state, request);
|
|
if (err != 0)
|
|
return err;
|
|
do {
|
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
|
|
return 0;
|
|
err = _nfs4_do_setlk(state, F_SETLK, request, 0);
|
|
if (err != -NFS4ERR_DELAY)
|
|
break;
|
|
nfs4_handle_exception(server, err, &exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
|
|
{
|
|
struct nfs_client *clp = state->owner->so_client;
|
|
unsigned char fl_flags = request->fl_flags;
|
|
int status;
|
|
|
|
/* Is this a delegated open? */
|
|
status = nfs4_set_lock_state(state, request);
|
|
if (status != 0)
|
|
goto out;
|
|
request->fl_flags |= FL_ACCESS;
|
|
status = do_vfs_lock(request->fl_file, request);
|
|
if (status < 0)
|
|
goto out;
|
|
down_read(&clp->cl_sem);
|
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
|
|
struct nfs_inode *nfsi = NFS_I(state->inode);
|
|
/* Yes: cache locks! */
|
|
down_read(&nfsi->rwsem);
|
|
/* ...but avoid races with delegation recall... */
|
|
if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
|
|
request->fl_flags = fl_flags & ~FL_SLEEP;
|
|
status = do_vfs_lock(request->fl_file, request);
|
|
up_read(&nfsi->rwsem);
|
|
goto out_unlock;
|
|
}
|
|
up_read(&nfsi->rwsem);
|
|
}
|
|
status = _nfs4_do_setlk(state, cmd, request, 0);
|
|
if (status != 0)
|
|
goto out_unlock;
|
|
/* Note: we always want to sleep here! */
|
|
request->fl_flags = fl_flags | FL_SLEEP;
|
|
if (do_vfs_lock(request->fl_file, request) < 0)
|
|
printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
|
|
out_unlock:
|
|
up_read(&clp->cl_sem);
|
|
out:
|
|
request->fl_flags = fl_flags;
|
|
return status;
|
|
}
|
|
|
|
static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
|
|
{
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
|
|
do {
|
|
err = nfs4_handle_exception(NFS_SERVER(state->inode),
|
|
_nfs4_proc_setlk(state, cmd, request),
|
|
&exception);
|
|
} while (exception.retry);
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
|
|
{
|
|
struct nfs_open_context *ctx;
|
|
struct nfs4_state *state;
|
|
unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
|
|
int status;
|
|
|
|
/* verify open state */
|
|
ctx = nfs_file_open_context(filp);
|
|
state = ctx->state;
|
|
|
|
if (request->fl_start < 0 || request->fl_end < 0)
|
|
return -EINVAL;
|
|
|
|
if (IS_GETLK(cmd))
|
|
return nfs4_proc_getlk(state, F_GETLK, request);
|
|
|
|
if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
|
|
return -EINVAL;
|
|
|
|
if (request->fl_type == F_UNLCK)
|
|
return nfs4_proc_unlck(state, cmd, request);
|
|
|
|
do {
|
|
status = nfs4_proc_setlk(state, cmd, request);
|
|
if ((status != -EAGAIN) || IS_SETLK(cmd))
|
|
break;
|
|
timeout = nfs4_set_lock_task_retry(timeout);
|
|
status = -ERESTARTSYS;
|
|
if (signalled())
|
|
break;
|
|
} while(status < 0);
|
|
return status;
|
|
}
|
|
|
|
int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(state->inode);
|
|
struct nfs4_exception exception = { };
|
|
int err;
|
|
|
|
err = nfs4_set_lock_state(state, fl);
|
|
if (err != 0)
|
|
goto out;
|
|
do {
|
|
err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
|
|
if (err != -NFS4ERR_DELAY)
|
|
break;
|
|
err = nfs4_handle_exception(server, err, &exception);
|
|
} while (exception.retry);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
|
|
|
|
int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
|
|
size_t buflen, int flags)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
|
|
if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
|
|
return -EOPNOTSUPP;
|
|
|
|
return nfs4_proc_set_acl(inode, buf, buflen);
|
|
}
|
|
|
|
/* The getxattr man page suggests returning -ENODATA for unknown attributes,
|
|
* and that's what we'll do for e.g. user attributes that haven't been set.
|
|
* But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
|
|
* attributes in kernel-managed attribute namespaces. */
|
|
ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
|
|
size_t buflen)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
|
|
if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
|
|
return -EOPNOTSUPP;
|
|
|
|
return nfs4_proc_get_acl(inode, buf, buflen);
|
|
}
|
|
|
|
ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
|
|
{
|
|
size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
|
|
|
|
if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
|
|
return 0;
|
|
if (buf && buflen < len)
|
|
return -ERANGE;
|
|
if (buf)
|
|
memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
|
|
return len;
|
|
}
|
|
|
|
int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
|
|
struct nfs4_fs_locations *fs_locations, struct page *page)
|
|
{
|
|
struct nfs_server *server = NFS_SERVER(dir);
|
|
u32 bitmask[2] = {
|
|
[0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
|
|
[1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
|
|
};
|
|
struct nfs4_fs_locations_arg args = {
|
|
.dir_fh = NFS_FH(dir),
|
|
.name = name,
|
|
.page = page,
|
|
.bitmask = bitmask,
|
|
};
|
|
struct rpc_message msg = {
|
|
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
|
|
.rpc_argp = &args,
|
|
.rpc_resp = fs_locations,
|
|
};
|
|
int status;
|
|
|
|
dprintk("%s: start\n", __FUNCTION__);
|
|
nfs_fattr_init(&fs_locations->fattr);
|
|
fs_locations->server = server;
|
|
fs_locations->nlocations = 0;
|
|
status = rpc_call_sync(server->client, &msg, 0);
|
|
dprintk("%s: returned status = %d\n", __FUNCTION__, status);
|
|
return status;
|
|
}
|
|
|
|
struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
|
|
.recover_open = nfs4_open_reclaim,
|
|
.recover_lock = nfs4_lock_reclaim,
|
|
};
|
|
|
|
struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
|
|
.recover_open = nfs4_open_expired,
|
|
.recover_lock = nfs4_lock_expired,
|
|
};
|
|
|
|
static const struct inode_operations nfs4_file_inode_operations = {
|
|
.permission = nfs_permission,
|
|
.getattr = nfs_getattr,
|
|
.setattr = nfs_setattr,
|
|
.getxattr = nfs4_getxattr,
|
|
.setxattr = nfs4_setxattr,
|
|
.listxattr = nfs4_listxattr,
|
|
};
|
|
|
|
const struct nfs_rpc_ops nfs_v4_clientops = {
|
|
.version = 4, /* protocol version */
|
|
.dentry_ops = &nfs4_dentry_operations,
|
|
.dir_inode_ops = &nfs4_dir_inode_operations,
|
|
.file_inode_ops = &nfs4_file_inode_operations,
|
|
.getroot = nfs4_proc_get_root,
|
|
.getattr = nfs4_proc_getattr,
|
|
.setattr = nfs4_proc_setattr,
|
|
.lookupfh = nfs4_proc_lookupfh,
|
|
.lookup = nfs4_proc_lookup,
|
|
.access = nfs4_proc_access,
|
|
.readlink = nfs4_proc_readlink,
|
|
.create = nfs4_proc_create,
|
|
.remove = nfs4_proc_remove,
|
|
.unlink_setup = nfs4_proc_unlink_setup,
|
|
.unlink_done = nfs4_proc_unlink_done,
|
|
.rename = nfs4_proc_rename,
|
|
.link = nfs4_proc_link,
|
|
.symlink = nfs4_proc_symlink,
|
|
.mkdir = nfs4_proc_mkdir,
|
|
.rmdir = nfs4_proc_remove,
|
|
.readdir = nfs4_proc_readdir,
|
|
.mknod = nfs4_proc_mknod,
|
|
.statfs = nfs4_proc_statfs,
|
|
.fsinfo = nfs4_proc_fsinfo,
|
|
.pathconf = nfs4_proc_pathconf,
|
|
.set_capabilities = nfs4_server_capabilities,
|
|
.decode_dirent = nfs4_decode_dirent,
|
|
.read_setup = nfs4_proc_read_setup,
|
|
.read_done = nfs4_read_done,
|
|
.write_setup = nfs4_proc_write_setup,
|
|
.write_done = nfs4_write_done,
|
|
.commit_setup = nfs4_proc_commit_setup,
|
|
.commit_done = nfs4_commit_done,
|
|
.file_open = nfs_open,
|
|
.file_release = nfs_release,
|
|
.lock = nfs4_proc_lock,
|
|
.clear_acl_cache = nfs4_zap_acl_attr,
|
|
};
|
|
|
|
/*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|