4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/utsname.h>
40 #include <linux/delay.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/smp_lock.h>
49 #include <linux/namei.h>
50 #include <linux/mount.h>
53 #include "delegation.h"
57 #define NFSDBG_FACILITY NFSDBG_PROC
59 #define NFS4_POLL_RETRY_MIN (HZ/10)
60 #define NFS4_POLL_RETRY_MAX (15*HZ)
63 static int _nfs4_proc_open(struct nfs4_opendata
*data
);
64 static int nfs4_do_fsinfo(struct nfs_server
*, struct nfs_fh
*, struct nfs_fsinfo
*);
65 static int nfs4_async_handle_error(struct rpc_task
*, const struct nfs_server
*, struct nfs4_state
*);
66 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
67 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
69 /* Prevent leaks of NFSv4 errors into userland */
70 static int nfs4_map_errors(int err
)
73 dprintk("%s could not handle NFSv4 error %d\n",
81 * This is our standard bitmap for GETATTR requests.
83 const u32 nfs4_fattr_bitmap
[2] = {
88 | FATTR4_WORD0_FILEID
,
90 | FATTR4_WORD1_NUMLINKS
92 | FATTR4_WORD1_OWNER_GROUP
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
100 const u32 nfs4_statfs_bitmap
[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL
,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
109 const u32 nfs4_pathconf_bitmap
[2] = {
111 | FATTR4_WORD0_MAXNAME
,
115 const u32 nfs4_fsinfo_bitmap
[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME
,
122 const u32 nfs4_fs_locations_bitmap
[2] = {
124 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS
,
130 | FATTR4_WORD1_NUMLINKS
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
141 static void nfs4_setup_readdir(u64 cookie
, __be32
*verifier
, struct dentry
*dentry
,
142 struct nfs4_readdir_arg
*readdir
)
146 BUG_ON(readdir
->count
< 80);
148 readdir
->cookie
= cookie
;
149 memcpy(&readdir
->verifier
, verifier
, sizeof(readdir
->verifier
));
154 memset(&readdir
->verifier
, 0, sizeof(readdir
->verifier
));
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
165 start
= p
= kmap_atomic(*readdir
->pages
, KM_USER0
);
168 *p
++ = xdr_one
; /* next */
169 *p
++ = xdr_zero
; /* cookie, first word */
170 *p
++ = xdr_one
; /* cookie, second word */
171 *p
++ = xdr_one
; /* entry len */
172 memcpy(p
, ".\0\0\0", 4); /* entry */
174 *p
++ = xdr_one
; /* bitmap length */
175 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
176 *p
++ = htonl(8); /* attribute buffer length */
177 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_inode
));
180 *p
++ = xdr_one
; /* next */
181 *p
++ = xdr_zero
; /* cookie, first word */
182 *p
++ = xdr_two
; /* cookie, second word */
183 *p
++ = xdr_two
; /* entry len */
184 memcpy(p
, "..\0\0", 4); /* entry */
186 *p
++ = xdr_one
; /* bitmap length */
187 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
188 *p
++ = htonl(8); /* attribute buffer length */
189 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_parent
->d_inode
));
191 readdir
->pgbase
= (char *)p
- (char *)start
;
192 readdir
->count
-= readdir
->pgbase
;
193 kunmap_atomic(start
, KM_USER0
);
196 static int nfs4_wait_clnt_recover(struct nfs_client
*clp
)
202 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
,
203 nfs_wait_bit_killable
, TASK_KILLABLE
);
207 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
214 *timeout
= NFS4_POLL_RETRY_MIN
;
215 if (*timeout
> NFS4_POLL_RETRY_MAX
)
216 *timeout
= NFS4_POLL_RETRY_MAX
;
217 schedule_timeout_killable(*timeout
);
218 if (fatal_signal_pending(current
))
224 /* This is the error handling routine for processes that are allowed
227 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
229 struct nfs_client
*clp
= server
->nfs_client
;
230 struct nfs4_state
*state
= exception
->state
;
233 exception
->retry
= 0;
237 case -NFS4ERR_ADMIN_REVOKED
:
238 case -NFS4ERR_BAD_STATEID
:
239 case -NFS4ERR_OPENMODE
:
242 nfs4_state_mark_reclaim_nograce(clp
, state
);
243 case -NFS4ERR_STALE_CLIENTID
:
244 case -NFS4ERR_STALE_STATEID
:
245 case -NFS4ERR_EXPIRED
:
246 nfs4_schedule_state_recovery(clp
);
247 ret
= nfs4_wait_clnt_recover(clp
);
249 exception
->retry
= 1;
251 case -NFS4ERR_FILE_OPEN
:
254 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
257 case -NFS4ERR_OLD_STATEID
:
258 exception
->retry
= 1;
260 /* We failed to handle the error */
261 return nfs4_map_errors(ret
);
265 static void renew_lease(const struct nfs_server
*server
, unsigned long timestamp
)
267 struct nfs_client
*clp
= server
->nfs_client
;
268 spin_lock(&clp
->cl_lock
);
269 if (time_before(clp
->cl_last_renewal
,timestamp
))
270 clp
->cl_last_renewal
= timestamp
;
271 spin_unlock(&clp
->cl_lock
);
274 #if defined(CONFIG_NFS_V4_1)
277 * nfs4_free_slot - free a slot and efficiently update slot table.
279 * freeing a slot is trivially done by clearing its respective bit
281 * If the freed slotid equals highest_used_slotid we want to update it
282 * so that the server would be able to size down the slot table if needed,
283 * otherwise we know that the highest_used_slotid is still in use.
284 * When updating highest_used_slotid there may be "holes" in the bitmap
285 * so we need to scan down from highest_used_slotid to 0 looking for the now
286 * highest slotid in use.
287 * If none found, highest_used_slotid is set to -1.
290 nfs4_free_slot(struct nfs4_slot_table
*tbl
, u8 free_slotid
)
292 int slotid
= free_slotid
;
294 spin_lock(&tbl
->slot_tbl_lock
);
295 /* clear used bit in bitmap */
296 __clear_bit(slotid
, tbl
->used_slots
);
298 /* update highest_used_slotid when it is freed */
299 if (slotid
== tbl
->highest_used_slotid
) {
300 slotid
= find_last_bit(tbl
->used_slots
, tbl
->max_slots
);
301 if (slotid
>= 0 && slotid
< tbl
->max_slots
)
302 tbl
->highest_used_slotid
= slotid
;
304 tbl
->highest_used_slotid
= -1;
306 rpc_wake_up_next(&tbl
->slot_tbl_waitq
);
307 spin_unlock(&tbl
->slot_tbl_lock
);
308 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__
,
309 free_slotid
, tbl
->highest_used_slotid
);
312 void nfs41_sequence_free_slot(const struct nfs_client
*clp
,
313 struct nfs4_sequence_res
*res
)
315 struct nfs4_slot_table
*tbl
;
317 if (!nfs4_has_session(clp
)) {
318 dprintk("%s: No session\n", __func__
);
321 tbl
= &clp
->cl_session
->fc_slot_table
;
322 if (res
->sr_slotid
== NFS4_MAX_SLOT_TABLE
) {
323 dprintk("%s: No slot\n", __func__
);
324 /* just wake up the next guy waiting since
325 * we may have not consumed a slot after all */
326 rpc_wake_up_next(&tbl
->slot_tbl_waitq
);
329 nfs4_free_slot(tbl
, res
->sr_slotid
);
330 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
333 static void nfs41_sequence_done(struct nfs_client
*clp
,
334 struct nfs4_sequence_res
*res
,
337 unsigned long timestamp
;
338 struct nfs4_slot_table
*tbl
;
339 struct nfs4_slot
*slot
;
342 * sr_status remains 1 if an RPC level error occurred. The server
343 * may or may not have processed the sequence operation..
344 * Proceed as if the server received and processed the sequence
347 if (res
->sr_status
== 1)
348 res
->sr_status
= NFS_OK
;
350 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
351 if (res
->sr_slotid
== NFS4_MAX_SLOT_TABLE
)
354 tbl
= &clp
->cl_session
->fc_slot_table
;
355 slot
= tbl
->slots
+ res
->sr_slotid
;
357 if (res
->sr_status
== 0) {
358 /* Update the slot's sequence and clientid lease timer */
360 timestamp
= res
->sr_renewal_time
;
361 spin_lock(&clp
->cl_lock
);
362 if (time_before(clp
->cl_last_renewal
, timestamp
))
363 clp
->cl_last_renewal
= timestamp
;
364 spin_unlock(&clp
->cl_lock
);
368 /* The session may be reset by one of the error handlers. */
369 dprintk("%s: Error %d free the slot \n", __func__
, res
->sr_status
);
370 nfs41_sequence_free_slot(clp
, res
);
374 * nfs4_find_slot - efficiently look for a free slot
376 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
377 * If found, we mark the slot as used, update the highest_used_slotid,
378 * and respectively set up the sequence operation args.
379 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
381 * Note: must be called with under the slot_tbl_lock.
384 nfs4_find_slot(struct nfs4_slot_table
*tbl
, struct rpc_task
*task
)
387 u8 ret_id
= NFS4_MAX_SLOT_TABLE
;
388 BUILD_BUG_ON((u8
)NFS4_MAX_SLOT_TABLE
!= (int)NFS4_MAX_SLOT_TABLE
);
390 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
391 __func__
, tbl
->used_slots
[0], tbl
->highest_used_slotid
,
393 slotid
= find_first_zero_bit(tbl
->used_slots
, tbl
->max_slots
);
394 if (slotid
>= tbl
->max_slots
)
396 __set_bit(slotid
, tbl
->used_slots
);
397 if (slotid
> tbl
->highest_used_slotid
)
398 tbl
->highest_used_slotid
= slotid
;
401 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
402 __func__
, tbl
->used_slots
[0], tbl
->highest_used_slotid
, ret_id
);
406 static int nfs41_setup_sequence(struct nfs4_session
*session
,
407 struct nfs4_sequence_args
*args
,
408 struct nfs4_sequence_res
*res
,
410 struct rpc_task
*task
)
412 struct nfs4_slot
*slot
;
413 struct nfs4_slot_table
*tbl
;
416 dprintk("--> %s\n", __func__
);
417 /* slot already allocated? */
418 if (res
->sr_slotid
!= NFS4_MAX_SLOT_TABLE
)
421 memset(res
, 0, sizeof(*res
));
422 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
423 tbl
= &session
->fc_slot_table
;
425 spin_lock(&tbl
->slot_tbl_lock
);
426 slotid
= nfs4_find_slot(tbl
, task
);
427 if (slotid
== NFS4_MAX_SLOT_TABLE
) {
428 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
429 spin_unlock(&tbl
->slot_tbl_lock
);
430 dprintk("<-- %s: no free slots\n", __func__
);
433 spin_unlock(&tbl
->slot_tbl_lock
);
435 slot
= tbl
->slots
+ slotid
;
436 args
->sa_slotid
= slotid
;
437 args
->sa_cache_this
= cache_reply
;
439 dprintk("<-- %s slotid=%d seqid=%d\n", __func__
, slotid
, slot
->seq_nr
);
441 res
->sr_slotid
= slotid
;
442 res
->sr_renewal_time
= jiffies
;
444 * sr_status is only set in decode_sequence, and so will remain
445 * set to 1 if an rpc level failure occurs.
451 int nfs4_setup_sequence(struct nfs_client
*clp
,
452 struct nfs4_sequence_args
*args
,
453 struct nfs4_sequence_res
*res
,
455 struct rpc_task
*task
)
459 dprintk("--> %s clp %p session %p sr_slotid %d\n",
460 __func__
, clp
, clp
->cl_session
, res
->sr_slotid
);
462 if (!nfs4_has_session(clp
))
464 ret
= nfs41_setup_sequence(clp
->cl_session
, args
, res
, cache_reply
,
466 if (ret
!= -EAGAIN
) {
467 /* terminate rpc task */
468 task
->tk_status
= ret
;
469 task
->tk_action
= NULL
;
472 dprintk("<-- %s status=%d\n", __func__
, ret
);
476 struct nfs41_call_sync_data
{
477 struct nfs_client
*clp
;
478 struct nfs4_sequence_args
*seq_args
;
479 struct nfs4_sequence_res
*seq_res
;
483 static void nfs41_call_sync_prepare(struct rpc_task
*task
, void *calldata
)
485 struct nfs41_call_sync_data
*data
= calldata
;
487 dprintk("--> %s data->clp->cl_session %p\n", __func__
,
488 data
->clp
->cl_session
);
489 if (nfs4_setup_sequence(data
->clp
, data
->seq_args
,
490 data
->seq_res
, data
->cache_reply
, task
))
492 rpc_call_start(task
);
495 static void nfs41_call_sync_done(struct rpc_task
*task
, void *calldata
)
497 struct nfs41_call_sync_data
*data
= calldata
;
499 nfs41_sequence_done(data
->clp
, data
->seq_res
, task
->tk_status
);
500 nfs41_sequence_free_slot(data
->clp
, data
->seq_res
);
503 struct rpc_call_ops nfs41_call_sync_ops
= {
504 .rpc_call_prepare
= nfs41_call_sync_prepare
,
505 .rpc_call_done
= nfs41_call_sync_done
,
508 static int nfs4_call_sync_sequence(struct nfs_client
*clp
,
509 struct rpc_clnt
*clnt
,
510 struct rpc_message
*msg
,
511 struct nfs4_sequence_args
*args
,
512 struct nfs4_sequence_res
*res
,
516 struct rpc_task
*task
;
517 struct nfs41_call_sync_data data
= {
521 .cache_reply
= cache_reply
,
523 struct rpc_task_setup task_setup
= {
526 .callback_ops
= &nfs41_call_sync_ops
,
527 .callback_data
= &data
530 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
531 task
= rpc_run_task(&task_setup
);
535 ret
= task
->tk_status
;
541 int _nfs4_call_sync_session(struct nfs_server
*server
,
542 struct rpc_message
*msg
,
543 struct nfs4_sequence_args
*args
,
544 struct nfs4_sequence_res
*res
,
547 return nfs4_call_sync_sequence(server
->nfs_client
, server
->client
,
548 msg
, args
, res
, cache_reply
);
551 #endif /* CONFIG_NFS_V4_1 */
553 int _nfs4_call_sync(struct nfs_server
*server
,
554 struct rpc_message
*msg
,
555 struct nfs4_sequence_args
*args
,
556 struct nfs4_sequence_res
*res
,
559 args
->sa_session
= res
->sr_session
= NULL
;
560 return rpc_call_sync(server
->client
, msg
, 0);
563 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
564 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
565 &(res)->seq_res, (cache_reply))
567 static void nfs4_sequence_done(const struct nfs_server
*server
,
568 struct nfs4_sequence_res
*res
, int rpc_status
)
570 #ifdef CONFIG_NFS_V4_1
571 if (nfs4_has_session(server
->nfs_client
))
572 nfs41_sequence_done(server
->nfs_client
, res
, rpc_status
);
573 #endif /* CONFIG_NFS_V4_1 */
576 /* no restart, therefore free slot here */
577 static void nfs4_sequence_done_free_slot(const struct nfs_server
*server
,
578 struct nfs4_sequence_res
*res
,
581 nfs4_sequence_done(server
, res
, rpc_status
);
582 nfs4_sequence_free_slot(server
->nfs_client
, res
);
585 static void update_changeattr(struct inode
*dir
, struct nfs4_change_info
*cinfo
)
587 struct nfs_inode
*nfsi
= NFS_I(dir
);
589 spin_lock(&dir
->i_lock
);
590 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
|NFS_INO_INVALID_DATA
;
591 if (!cinfo
->atomic
|| cinfo
->before
!= nfsi
->change_attr
)
592 nfs_force_lookup_revalidate(dir
);
593 nfsi
->change_attr
= cinfo
->after
;
594 spin_unlock(&dir
->i_lock
);
597 struct nfs4_opendata
{
599 struct nfs_openargs o_arg
;
600 struct nfs_openres o_res
;
601 struct nfs_open_confirmargs c_arg
;
602 struct nfs_open_confirmres c_res
;
603 struct nfs_fattr f_attr
;
604 struct nfs_fattr dir_attr
;
607 struct nfs4_state_owner
*owner
;
608 struct nfs4_state
*state
;
610 unsigned long timestamp
;
611 unsigned int rpc_done
: 1;
617 static void nfs4_init_opendata_res(struct nfs4_opendata
*p
)
619 p
->o_res
.f_attr
= &p
->f_attr
;
620 p
->o_res
.dir_attr
= &p
->dir_attr
;
621 p
->o_res
.seqid
= p
->o_arg
.seqid
;
622 p
->c_res
.seqid
= p
->c_arg
.seqid
;
623 p
->o_res
.server
= p
->o_arg
.server
;
624 nfs_fattr_init(&p
->f_attr
);
625 nfs_fattr_init(&p
->dir_attr
);
628 static struct nfs4_opendata
*nfs4_opendata_alloc(struct path
*path
,
629 struct nfs4_state_owner
*sp
, fmode_t fmode
, int flags
,
630 const struct iattr
*attrs
)
632 struct dentry
*parent
= dget_parent(path
->dentry
);
633 struct inode
*dir
= parent
->d_inode
;
634 struct nfs_server
*server
= NFS_SERVER(dir
);
635 struct nfs4_opendata
*p
;
637 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
640 p
->o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
641 if (p
->o_arg
.seqid
== NULL
)
643 p
->path
.mnt
= mntget(path
->mnt
);
644 p
->path
.dentry
= dget(path
->dentry
);
647 atomic_inc(&sp
->so_count
);
648 p
->o_arg
.fh
= NFS_FH(dir
);
649 p
->o_arg
.open_flags
= flags
;
650 p
->o_arg
.fmode
= fmode
& (FMODE_READ
|FMODE_WRITE
);
651 p
->o_arg
.clientid
= server
->nfs_client
->cl_clientid
;
652 p
->o_arg
.id
= sp
->so_owner_id
.id
;
653 p
->o_arg
.name
= &p
->path
.dentry
->d_name
;
654 p
->o_arg
.server
= server
;
655 p
->o_arg
.bitmask
= server
->attr_bitmask
;
656 p
->o_arg
.claim
= NFS4_OPEN_CLAIM_NULL
;
657 p
->o_res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
658 if (flags
& O_EXCL
) {
659 u32
*s
= (u32
*) p
->o_arg
.u
.verifier
.data
;
662 } else if (flags
& O_CREAT
) {
663 p
->o_arg
.u
.attrs
= &p
->attrs
;
664 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
666 p
->c_arg
.fh
= &p
->o_res
.fh
;
667 p
->c_arg
.stateid
= &p
->o_res
.stateid
;
668 p
->c_arg
.seqid
= p
->o_arg
.seqid
;
669 nfs4_init_opendata_res(p
);
679 static void nfs4_opendata_free(struct kref
*kref
)
681 struct nfs4_opendata
*p
= container_of(kref
,
682 struct nfs4_opendata
, kref
);
684 nfs_free_seqid(p
->o_arg
.seqid
);
685 if (p
->state
!= NULL
)
686 nfs4_put_open_state(p
->state
);
687 nfs4_put_state_owner(p
->owner
);
693 static void nfs4_opendata_put(struct nfs4_opendata
*p
)
696 kref_put(&p
->kref
, nfs4_opendata_free
);
699 static int nfs4_wait_for_completion_rpc_task(struct rpc_task
*task
)
703 ret
= rpc_wait_for_completion_task(task
);
707 static int can_open_cached(struct nfs4_state
*state
, fmode_t mode
, int open_mode
)
711 if (open_mode
& O_EXCL
)
713 switch (mode
& (FMODE_READ
|FMODE_WRITE
)) {
715 ret
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0;
718 ret
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0;
720 case FMODE_READ
|FMODE_WRITE
:
721 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0;
727 static int can_open_delegated(struct nfs_delegation
*delegation
, fmode_t fmode
)
729 if ((delegation
->type
& fmode
) != fmode
)
731 if (test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
))
733 nfs_mark_delegation_referenced(delegation
);
737 static void update_open_stateflags(struct nfs4_state
*state
, fmode_t fmode
)
746 case FMODE_READ
|FMODE_WRITE
:
749 nfs4_state_set_mode_locked(state
, state
->state
| fmode
);
752 static void nfs_set_open_stateid_locked(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
754 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
755 memcpy(state
->stateid
.data
, stateid
->data
, sizeof(state
->stateid
.data
));
756 memcpy(state
->open_stateid
.data
, stateid
->data
, sizeof(state
->open_stateid
.data
));
759 set_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
762 set_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
764 case FMODE_READ
|FMODE_WRITE
:
765 set_bit(NFS_O_RDWR_STATE
, &state
->flags
);
769 static void nfs_set_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
771 write_seqlock(&state
->seqlock
);
772 nfs_set_open_stateid_locked(state
, stateid
, fmode
);
773 write_sequnlock(&state
->seqlock
);
776 static void __update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, const nfs4_stateid
*deleg_stateid
, fmode_t fmode
)
779 * Protect the call to nfs4_state_set_mode_locked and
780 * serialise the stateid update
782 write_seqlock(&state
->seqlock
);
783 if (deleg_stateid
!= NULL
) {
784 memcpy(state
->stateid
.data
, deleg_stateid
->data
, sizeof(state
->stateid
.data
));
785 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
787 if (open_stateid
!= NULL
)
788 nfs_set_open_stateid_locked(state
, open_stateid
, fmode
);
789 write_sequnlock(&state
->seqlock
);
790 spin_lock(&state
->owner
->so_lock
);
791 update_open_stateflags(state
, fmode
);
792 spin_unlock(&state
->owner
->so_lock
);
795 static int update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, nfs4_stateid
*delegation
, fmode_t fmode
)
797 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
798 struct nfs_delegation
*deleg_cur
;
801 fmode
&= (FMODE_READ
|FMODE_WRITE
);
804 deleg_cur
= rcu_dereference(nfsi
->delegation
);
805 if (deleg_cur
== NULL
)
808 spin_lock(&deleg_cur
->lock
);
809 if (nfsi
->delegation
!= deleg_cur
||
810 (deleg_cur
->type
& fmode
) != fmode
)
811 goto no_delegation_unlock
;
813 if (delegation
== NULL
)
814 delegation
= &deleg_cur
->stateid
;
815 else if (memcmp(deleg_cur
->stateid
.data
, delegation
->data
, NFS4_STATEID_SIZE
) != 0)
816 goto no_delegation_unlock
;
818 nfs_mark_delegation_referenced(deleg_cur
);
819 __update_open_stateid(state
, open_stateid
, &deleg_cur
->stateid
, fmode
);
821 no_delegation_unlock
:
822 spin_unlock(&deleg_cur
->lock
);
826 if (!ret
&& open_stateid
!= NULL
) {
827 __update_open_stateid(state
, open_stateid
, NULL
, fmode
);
835 static void nfs4_return_incompatible_delegation(struct inode
*inode
, fmode_t fmode
)
837 struct nfs_delegation
*delegation
;
840 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
841 if (delegation
== NULL
|| (delegation
->type
& fmode
) == fmode
) {
846 nfs_inode_return_delegation(inode
);
849 static struct nfs4_state
*nfs4_try_open_cached(struct nfs4_opendata
*opendata
)
851 struct nfs4_state
*state
= opendata
->state
;
852 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
853 struct nfs_delegation
*delegation
;
854 int open_mode
= opendata
->o_arg
.open_flags
& O_EXCL
;
855 fmode_t fmode
= opendata
->o_arg
.fmode
;
856 nfs4_stateid stateid
;
860 if (can_open_cached(state
, fmode
, open_mode
)) {
861 spin_lock(&state
->owner
->so_lock
);
862 if (can_open_cached(state
, fmode
, open_mode
)) {
863 update_open_stateflags(state
, fmode
);
864 spin_unlock(&state
->owner
->so_lock
);
865 goto out_return_state
;
867 spin_unlock(&state
->owner
->so_lock
);
870 delegation
= rcu_dereference(nfsi
->delegation
);
871 if (delegation
== NULL
||
872 !can_open_delegated(delegation
, fmode
)) {
876 /* Save the delegation */
877 memcpy(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
));
879 ret
= nfs_may_open(state
->inode
, state
->owner
->so_cred
, open_mode
);
884 /* Try to update the stateid using the delegation */
885 if (update_open_stateid(state
, NULL
, &stateid
, fmode
))
886 goto out_return_state
;
891 atomic_inc(&state
->count
);
895 static struct nfs4_state
*nfs4_opendata_to_nfs4_state(struct nfs4_opendata
*data
)
898 struct nfs4_state
*state
= NULL
;
899 struct nfs_delegation
*delegation
;
902 if (!data
->rpc_done
) {
903 state
= nfs4_try_open_cached(data
);
908 if (!(data
->f_attr
.valid
& NFS_ATTR_FATTR
))
910 inode
= nfs_fhget(data
->dir
->d_sb
, &data
->o_res
.fh
, &data
->f_attr
);
911 ret
= PTR_ERR(inode
);
915 state
= nfs4_get_open_state(inode
, data
->owner
);
918 if (data
->o_res
.delegation_type
!= 0) {
919 int delegation_flags
= 0;
922 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
924 delegation_flags
= delegation
->flags
;
926 if ((delegation_flags
& 1UL<<NFS_DELEGATION_NEED_RECLAIM
) == 0)
927 nfs_inode_set_delegation(state
->inode
,
928 data
->owner
->so_cred
,
931 nfs_inode_reclaim_delegation(state
->inode
,
932 data
->owner
->so_cred
,
936 update_open_stateid(state
, &data
->o_res
.stateid
, NULL
,
947 static struct nfs_open_context
*nfs4_state_find_open_context(struct nfs4_state
*state
)
949 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
950 struct nfs_open_context
*ctx
;
952 spin_lock(&state
->inode
->i_lock
);
953 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
954 if (ctx
->state
!= state
)
956 get_nfs_open_context(ctx
);
957 spin_unlock(&state
->inode
->i_lock
);
960 spin_unlock(&state
->inode
->i_lock
);
961 return ERR_PTR(-ENOENT
);
964 static struct nfs4_opendata
*nfs4_open_recoverdata_alloc(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
966 struct nfs4_opendata
*opendata
;
968 opendata
= nfs4_opendata_alloc(&ctx
->path
, state
->owner
, 0, 0, NULL
);
969 if (opendata
== NULL
)
970 return ERR_PTR(-ENOMEM
);
971 opendata
->state
= state
;
972 atomic_inc(&state
->count
);
976 static int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, fmode_t fmode
, struct nfs4_state
**res
)
978 struct nfs4_state
*newstate
;
981 opendata
->o_arg
.open_flags
= 0;
982 opendata
->o_arg
.fmode
= fmode
;
983 memset(&opendata
->o_res
, 0, sizeof(opendata
->o_res
));
984 memset(&opendata
->c_res
, 0, sizeof(opendata
->c_res
));
985 nfs4_init_opendata_res(opendata
);
986 ret
= _nfs4_proc_open(opendata
);
989 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
990 if (IS_ERR(newstate
))
991 return PTR_ERR(newstate
);
992 nfs4_close_state(&opendata
->path
, newstate
, fmode
);
997 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
999 struct nfs4_state
*newstate
;
1002 /* memory barrier prior to reading state->n_* */
1003 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
1005 if (state
->n_rdwr
!= 0) {
1006 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &newstate
);
1009 if (newstate
!= state
)
1012 if (state
->n_wronly
!= 0) {
1013 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &newstate
);
1016 if (newstate
!= state
)
1019 if (state
->n_rdonly
!= 0) {
1020 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &newstate
);
1023 if (newstate
!= state
)
1027 * We may have performed cached opens for all three recoveries.
1028 * Check if we need to update the current stateid.
1030 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0 &&
1031 memcmp(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
)) != 0) {
1032 write_seqlock(&state
->seqlock
);
1033 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
1034 memcpy(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
));
1035 write_sequnlock(&state
->seqlock
);
1042 * reclaim state on the server after a reboot.
1044 static int _nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1046 struct nfs_delegation
*delegation
;
1047 struct nfs4_opendata
*opendata
;
1048 fmode_t delegation_type
= 0;
1051 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1052 if (IS_ERR(opendata
))
1053 return PTR_ERR(opendata
);
1054 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
1055 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
1057 delegation
= rcu_dereference(NFS_I(state
->inode
)->delegation
);
1058 if (delegation
!= NULL
&& test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) != 0)
1059 delegation_type
= delegation
->type
;
1061 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
1062 status
= nfs4_open_recover(opendata
, state
);
1063 nfs4_opendata_put(opendata
);
1067 static int nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1069 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1070 struct nfs4_exception exception
= { };
1073 err
= _nfs4_do_open_reclaim(ctx
, state
);
1074 if (err
!= -NFS4ERR_DELAY
)
1076 nfs4_handle_exception(server
, err
, &exception
);
1077 } while (exception
.retry
);
1081 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1083 struct nfs_open_context
*ctx
;
1086 ctx
= nfs4_state_find_open_context(state
);
1088 return PTR_ERR(ctx
);
1089 ret
= nfs4_do_open_reclaim(ctx
, state
);
1090 put_nfs_open_context(ctx
);
1094 static int _nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
1096 struct nfs4_opendata
*opendata
;
1099 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1100 if (IS_ERR(opendata
))
1101 return PTR_ERR(opendata
);
1102 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
1103 memcpy(opendata
->o_arg
.u
.delegation
.data
, stateid
->data
,
1104 sizeof(opendata
->o_arg
.u
.delegation
.data
));
1105 ret
= nfs4_open_recover(opendata
, state
);
1106 nfs4_opendata_put(opendata
);
1110 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
1112 struct nfs4_exception exception
= { };
1113 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1116 err
= _nfs4_open_delegation_recall(ctx
, state
, stateid
);
1120 case -NFS4ERR_STALE_CLIENTID
:
1121 case -NFS4ERR_STALE_STATEID
:
1122 case -NFS4ERR_EXPIRED
:
1123 /* Don't recall a delegation if it was lost */
1124 nfs4_schedule_state_recovery(server
->nfs_client
);
1127 err
= nfs4_handle_exception(server
, err
, &exception
);
1128 } while (exception
.retry
);
1132 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
1134 struct nfs4_opendata
*data
= calldata
;
1136 data
->rpc_status
= task
->tk_status
;
1137 if (RPC_ASSASSINATED(task
))
1139 if (data
->rpc_status
== 0) {
1140 memcpy(data
->o_res
.stateid
.data
, data
->c_res
.stateid
.data
,
1141 sizeof(data
->o_res
.stateid
.data
));
1142 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
1143 renew_lease(data
->o_res
.server
, data
->timestamp
);
1148 static void nfs4_open_confirm_release(void *calldata
)
1150 struct nfs4_opendata
*data
= calldata
;
1151 struct nfs4_state
*state
= NULL
;
1153 /* If this request hasn't been cancelled, do nothing */
1154 if (data
->cancelled
== 0)
1156 /* In case of error, no cleanup! */
1157 if (!data
->rpc_done
)
1159 state
= nfs4_opendata_to_nfs4_state(data
);
1161 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
1163 nfs4_opendata_put(data
);
1166 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
1167 .rpc_call_done
= nfs4_open_confirm_done
,
1168 .rpc_release
= nfs4_open_confirm_release
,
1172 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1174 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
1176 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
1177 struct rpc_task
*task
;
1178 struct rpc_message msg
= {
1179 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
1180 .rpc_argp
= &data
->c_arg
,
1181 .rpc_resp
= &data
->c_res
,
1182 .rpc_cred
= data
->owner
->so_cred
,
1184 struct rpc_task_setup task_setup_data
= {
1185 .rpc_client
= server
->client
,
1186 .rpc_message
= &msg
,
1187 .callback_ops
= &nfs4_open_confirm_ops
,
1188 .callback_data
= data
,
1189 .workqueue
= nfsiod_workqueue
,
1190 .flags
= RPC_TASK_ASYNC
,
1194 kref_get(&data
->kref
);
1196 data
->rpc_status
= 0;
1197 data
->timestamp
= jiffies
;
1198 task
= rpc_run_task(&task_setup_data
);
1200 return PTR_ERR(task
);
1201 status
= nfs4_wait_for_completion_rpc_task(task
);
1203 data
->cancelled
= 1;
1206 status
= data
->rpc_status
;
1211 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
1213 struct nfs4_opendata
*data
= calldata
;
1214 struct nfs4_state_owner
*sp
= data
->owner
;
1216 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
1219 * Check if we still need to send an OPEN call, or if we can use
1220 * a delegation instead.
1222 if (data
->state
!= NULL
) {
1223 struct nfs_delegation
*delegation
;
1225 if (can_open_cached(data
->state
, data
->o_arg
.fmode
, data
->o_arg
.open_flags
))
1228 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
1229 if (delegation
!= NULL
&&
1230 test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) == 0) {
1236 /* Update sequence id. */
1237 data
->o_arg
.id
= sp
->so_owner_id
.id
;
1238 data
->o_arg
.clientid
= sp
->so_client
->cl_clientid
;
1239 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
) {
1240 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
1241 nfs_copy_fh(&data
->o_res
.fh
, data
->o_arg
.fh
);
1243 data
->timestamp
= jiffies
;
1244 if (nfs4_setup_sequence(data
->o_arg
.server
->nfs_client
,
1245 &data
->o_arg
.seq_args
,
1246 &data
->o_res
.seq_res
, 1, task
))
1248 rpc_call_start(task
);
1251 task
->tk_action
= NULL
;
1255 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
1257 struct nfs4_opendata
*data
= calldata
;
1259 data
->rpc_status
= task
->tk_status
;
1261 nfs4_sequence_done_free_slot(data
->o_arg
.server
, &data
->o_res
.seq_res
,
1264 if (RPC_ASSASSINATED(task
))
1266 if (task
->tk_status
== 0) {
1267 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
1271 data
->rpc_status
= -ELOOP
;
1274 data
->rpc_status
= -EISDIR
;
1277 data
->rpc_status
= -ENOTDIR
;
1279 renew_lease(data
->o_res
.server
, data
->timestamp
);
1280 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
1281 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
1286 static void nfs4_open_release(void *calldata
)
1288 struct nfs4_opendata
*data
= calldata
;
1289 struct nfs4_state
*state
= NULL
;
1291 /* If this request hasn't been cancelled, do nothing */
1292 if (data
->cancelled
== 0)
1294 /* In case of error, no cleanup! */
1295 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
1297 /* In case we need an open_confirm, no cleanup! */
1298 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
1300 state
= nfs4_opendata_to_nfs4_state(data
);
1302 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
1304 nfs4_opendata_put(data
);
1307 static const struct rpc_call_ops nfs4_open_ops
= {
1308 .rpc_call_prepare
= nfs4_open_prepare
,
1309 .rpc_call_done
= nfs4_open_done
,
1310 .rpc_release
= nfs4_open_release
,
1314 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1316 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
1318 struct inode
*dir
= data
->dir
->d_inode
;
1319 struct nfs_server
*server
= NFS_SERVER(dir
);
1320 struct nfs_openargs
*o_arg
= &data
->o_arg
;
1321 struct nfs_openres
*o_res
= &data
->o_res
;
1322 struct rpc_task
*task
;
1323 struct rpc_message msg
= {
1324 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
1327 .rpc_cred
= data
->owner
->so_cred
,
1329 struct rpc_task_setup task_setup_data
= {
1330 .rpc_client
= server
->client
,
1331 .rpc_message
= &msg
,
1332 .callback_ops
= &nfs4_open_ops
,
1333 .callback_data
= data
,
1334 .workqueue
= nfsiod_workqueue
,
1335 .flags
= RPC_TASK_ASYNC
,
1339 kref_get(&data
->kref
);
1341 data
->rpc_status
= 0;
1342 data
->cancelled
= 0;
1343 task
= rpc_run_task(&task_setup_data
);
1345 return PTR_ERR(task
);
1346 status
= nfs4_wait_for_completion_rpc_task(task
);
1348 data
->cancelled
= 1;
1351 status
= data
->rpc_status
;
1353 if (status
!= 0 || !data
->rpc_done
)
1356 if (o_res
->fh
.size
== 0)
1357 _nfs4_proc_lookup(dir
, o_arg
->name
, &o_res
->fh
, o_res
->f_attr
);
1359 if (o_arg
->open_flags
& O_CREAT
) {
1360 update_changeattr(dir
, &o_res
->cinfo
);
1361 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
1363 nfs_refresh_inode(dir
, o_res
->dir_attr
);
1364 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1365 status
= _nfs4_proc_open_confirm(data
);
1369 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
1370 _nfs4_proc_getattr(server
, &o_res
->fh
, o_res
->f_attr
);
1374 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
1376 struct nfs_client
*clp
= server
->nfs_client
;
1380 ret
= nfs4_wait_clnt_recover(clp
);
1383 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
1384 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
1386 nfs4_schedule_state_recovery(clp
);
1393 * reclaim state on the server after a network partition.
1394 * Assumes caller holds the appropriate lock
1396 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1398 struct nfs4_opendata
*opendata
;
1401 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1402 if (IS_ERR(opendata
))
1403 return PTR_ERR(opendata
);
1404 ret
= nfs4_open_recover(opendata
, state
);
1406 d_drop(ctx
->path
.dentry
);
1407 nfs4_opendata_put(opendata
);
1411 static inline int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1413 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1414 struct nfs4_exception exception
= { };
1418 err
= _nfs4_open_expired(ctx
, state
);
1419 if (err
!= -NFS4ERR_DELAY
)
1421 nfs4_handle_exception(server
, err
, &exception
);
1422 } while (exception
.retry
);
1426 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1428 struct nfs_open_context
*ctx
;
1431 ctx
= nfs4_state_find_open_context(state
);
1433 return PTR_ERR(ctx
);
1434 ret
= nfs4_do_open_expired(ctx
, state
);
1435 put_nfs_open_context(ctx
);
1440 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1441 * fields corresponding to attributes that were used to store the verifier.
1442 * Make sure we clobber those fields in the later setattr call
1444 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1446 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1447 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1448 sattr
->ia_valid
|= ATTR_ATIME
;
1450 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1451 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1452 sattr
->ia_valid
|= ATTR_MTIME
;
1456 * Returns a referenced nfs4_state
1458 static int _nfs4_do_open(struct inode
*dir
, struct path
*path
, fmode_t fmode
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
1460 struct nfs4_state_owner
*sp
;
1461 struct nfs4_state
*state
= NULL
;
1462 struct nfs_server
*server
= NFS_SERVER(dir
);
1463 struct nfs4_opendata
*opendata
;
1466 /* Protect against reboot recovery conflicts */
1468 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1469 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1472 status
= nfs4_recover_expired_lease(server
);
1474 goto err_put_state_owner
;
1475 if (path
->dentry
->d_inode
!= NULL
)
1476 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, fmode
);
1478 opendata
= nfs4_opendata_alloc(path
, sp
, fmode
, flags
, sattr
);
1479 if (opendata
== NULL
)
1480 goto err_put_state_owner
;
1482 if (path
->dentry
->d_inode
!= NULL
)
1483 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1485 status
= _nfs4_proc_open(opendata
);
1487 goto err_opendata_put
;
1489 if (opendata
->o_arg
.open_flags
& O_EXCL
)
1490 nfs4_exclusive_attrset(opendata
, sattr
);
1492 state
= nfs4_opendata_to_nfs4_state(opendata
);
1493 status
= PTR_ERR(state
);
1495 goto err_opendata_put
;
1496 nfs4_opendata_put(opendata
);
1497 nfs4_put_state_owner(sp
);
1501 nfs4_opendata_put(opendata
);
1502 err_put_state_owner
:
1503 nfs4_put_state_owner(sp
);
1510 static struct nfs4_state
*nfs4_do_open(struct inode
*dir
, struct path
*path
, fmode_t fmode
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
)
1512 struct nfs4_exception exception
= { };
1513 struct nfs4_state
*res
;
1517 status
= _nfs4_do_open(dir
, path
, fmode
, flags
, sattr
, cred
, &res
);
1520 /* NOTE: BAD_SEQID means the server and client disagree about the
1521 * book-keeping w.r.t. state-changing operations
1522 * (OPEN/CLOSE/LOCK/LOCKU...)
1523 * It is actually a sign of a bug on the client or on the server.
1525 * If we receive a BAD_SEQID error in the particular case of
1526 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1527 * have unhashed the old state_owner for us, and that we can
1528 * therefore safely retry using a new one. We should still warn
1529 * the user though...
1531 if (status
== -NFS4ERR_BAD_SEQID
) {
1532 printk(KERN_WARNING
"NFS: v4 server %s "
1533 " returned a bad sequence-id error!\n",
1534 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1535 exception
.retry
= 1;
1539 * BAD_STATEID on OPEN means that the server cancelled our
1540 * state before it received the OPEN_CONFIRM.
1541 * Recover by retrying the request as per the discussion
1542 * on Page 181 of RFC3530.
1544 if (status
== -NFS4ERR_BAD_STATEID
) {
1545 exception
.retry
= 1;
1548 if (status
== -EAGAIN
) {
1549 /* We must have found a delegation */
1550 exception
.retry
= 1;
1553 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1554 status
, &exception
));
1555 } while (exception
.retry
);
1559 static int _nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1560 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1561 struct nfs4_state
*state
)
1563 struct nfs_server
*server
= NFS_SERVER(inode
);
1564 struct nfs_setattrargs arg
= {
1565 .fh
= NFS_FH(inode
),
1568 .bitmask
= server
->attr_bitmask
,
1570 struct nfs_setattrres res
= {
1574 struct rpc_message msg
= {
1575 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1580 unsigned long timestamp
= jiffies
;
1583 nfs_fattr_init(fattr
);
1585 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1586 /* Use that stateid */
1587 } else if (state
!= NULL
) {
1588 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1590 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1592 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
1593 if (status
== 0 && state
!= NULL
)
1594 renew_lease(server
, timestamp
);
1598 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1599 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1600 struct nfs4_state
*state
)
1602 struct nfs_server
*server
= NFS_SERVER(inode
);
1603 struct nfs4_exception exception
= { };
1606 err
= nfs4_handle_exception(server
,
1607 _nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
),
1609 } while (exception
.retry
);
1613 struct nfs4_closedata
{
1615 struct inode
*inode
;
1616 struct nfs4_state
*state
;
1617 struct nfs_closeargs arg
;
1618 struct nfs_closeres res
;
1619 struct nfs_fattr fattr
;
1620 unsigned long timestamp
;
1623 static void nfs4_free_closedata(void *data
)
1625 struct nfs4_closedata
*calldata
= data
;
1626 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1628 nfs4_put_open_state(calldata
->state
);
1629 nfs_free_seqid(calldata
->arg
.seqid
);
1630 nfs4_put_state_owner(sp
);
1631 path_put(&calldata
->path
);
1635 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1637 struct nfs4_closedata
*calldata
= data
;
1638 struct nfs4_state
*state
= calldata
->state
;
1639 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1641 nfs4_sequence_done(server
, &calldata
->res
.seq_res
, task
->tk_status
);
1642 if (RPC_ASSASSINATED(task
))
1644 /* hmm. we are done with the inode, and in the process of freeing
1645 * the state_owner. we keep this around to process errors
1647 switch (task
->tk_status
) {
1649 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, 0);
1650 renew_lease(server
, calldata
->timestamp
);
1652 case -NFS4ERR_STALE_STATEID
:
1653 case -NFS4ERR_OLD_STATEID
:
1654 case -NFS4ERR_BAD_STATEID
:
1655 case -NFS4ERR_EXPIRED
:
1656 if (calldata
->arg
.fmode
== 0)
1659 if (nfs4_async_handle_error(task
, server
, state
) == -EAGAIN
) {
1660 rpc_restart_call(task
);
1664 nfs4_sequence_free_slot(server
->nfs_client
, &calldata
->res
.seq_res
);
1665 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1668 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1670 struct nfs4_closedata
*calldata
= data
;
1671 struct nfs4_state
*state
= calldata
->state
;
1672 int clear_rd
, clear_wr
, clear_rdwr
;
1674 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1677 clear_rd
= clear_wr
= clear_rdwr
= 0;
1678 spin_lock(&state
->owner
->so_lock
);
1679 /* Calculate the change in open mode */
1680 if (state
->n_rdwr
== 0) {
1681 if (state
->n_rdonly
== 0) {
1682 clear_rd
|= test_and_clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1683 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1685 if (state
->n_wronly
== 0) {
1686 clear_wr
|= test_and_clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1687 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1690 spin_unlock(&state
->owner
->so_lock
);
1691 if (!clear_rd
&& !clear_wr
&& !clear_rdwr
) {
1692 /* Note: exit _without_ calling nfs4_close_done */
1693 task
->tk_action
= NULL
;
1696 nfs_fattr_init(calldata
->res
.fattr
);
1697 if (test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0) {
1698 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1699 calldata
->arg
.fmode
= FMODE_READ
;
1700 } else if (test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0) {
1701 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1702 calldata
->arg
.fmode
= FMODE_WRITE
;
1704 calldata
->timestamp
= jiffies
;
1705 if (nfs4_setup_sequence((NFS_SERVER(calldata
->inode
))->nfs_client
,
1706 &calldata
->arg
.seq_args
, &calldata
->res
.seq_res
,
1709 rpc_call_start(task
);
1712 static const struct rpc_call_ops nfs4_close_ops
= {
1713 .rpc_call_prepare
= nfs4_close_prepare
,
1714 .rpc_call_done
= nfs4_close_done
,
1715 .rpc_release
= nfs4_free_closedata
,
1719 * It is possible for data to be read/written from a mem-mapped file
1720 * after the sys_close call (which hits the vfs layer as a flush).
1721 * This means that we can't safely call nfsv4 close on a file until
1722 * the inode is cleared. This in turn means that we are not good
1723 * NFSv4 citizens - we do not indicate to the server to update the file's
1724 * share state even when we are done with one of the three share
1725 * stateid's in the inode.
1727 * NOTE: Caller must be holding the sp->so_owner semaphore!
1729 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
, int wait
)
1731 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1732 struct nfs4_closedata
*calldata
;
1733 struct nfs4_state_owner
*sp
= state
->owner
;
1734 struct rpc_task
*task
;
1735 struct rpc_message msg
= {
1736 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1737 .rpc_cred
= state
->owner
->so_cred
,
1739 struct rpc_task_setup task_setup_data
= {
1740 .rpc_client
= server
->client
,
1741 .rpc_message
= &msg
,
1742 .callback_ops
= &nfs4_close_ops
,
1743 .workqueue
= nfsiod_workqueue
,
1744 .flags
= RPC_TASK_ASYNC
,
1746 int status
= -ENOMEM
;
1748 calldata
= kzalloc(sizeof(*calldata
), GFP_KERNEL
);
1749 if (calldata
== NULL
)
1751 calldata
->inode
= state
->inode
;
1752 calldata
->state
= state
;
1753 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1754 calldata
->arg
.stateid
= &state
->open_stateid
;
1755 /* Serialization for the sequence id */
1756 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
1757 if (calldata
->arg
.seqid
== NULL
)
1758 goto out_free_calldata
;
1759 calldata
->arg
.fmode
= 0;
1760 calldata
->arg
.bitmask
= server
->cache_consistency_bitmask
;
1761 calldata
->res
.fattr
= &calldata
->fattr
;
1762 calldata
->res
.seqid
= calldata
->arg
.seqid
;
1763 calldata
->res
.server
= server
;
1764 calldata
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
1765 calldata
->path
.mnt
= mntget(path
->mnt
);
1766 calldata
->path
.dentry
= dget(path
->dentry
);
1768 msg
.rpc_argp
= &calldata
->arg
,
1769 msg
.rpc_resp
= &calldata
->res
,
1770 task_setup_data
.callback_data
= calldata
;
1771 task
= rpc_run_task(&task_setup_data
);
1773 return PTR_ERR(task
);
1776 status
= rpc_wait_for_completion_task(task
);
1782 nfs4_put_open_state(state
);
1783 nfs4_put_state_owner(sp
);
1787 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
, fmode_t fmode
)
1792 /* If the open_intent is for execute, we have an extra check to make */
1793 if (fmode
& FMODE_EXEC
) {
1794 ret
= nfs_may_open(state
->inode
,
1795 state
->owner
->so_cred
,
1796 nd
->intent
.open
.flags
);
1800 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
1801 if (!IS_ERR(filp
)) {
1802 struct nfs_open_context
*ctx
;
1803 ctx
= nfs_file_open_context(filp
);
1807 ret
= PTR_ERR(filp
);
1809 nfs4_close_sync(path
, state
, fmode
& (FMODE_READ
|FMODE_WRITE
));
1814 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
1816 struct path path
= {
1817 .mnt
= nd
->path
.mnt
,
1820 struct dentry
*parent
;
1822 struct rpc_cred
*cred
;
1823 struct nfs4_state
*state
;
1825 fmode_t fmode
= nd
->intent
.open
.flags
& (FMODE_READ
| FMODE_WRITE
| FMODE_EXEC
);
1827 if (nd
->flags
& LOOKUP_CREATE
) {
1828 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
1829 attr
.ia_valid
= ATTR_MODE
;
1830 if (!IS_POSIXACL(dir
))
1831 attr
.ia_mode
&= ~current_umask();
1834 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
1837 cred
= rpc_lookup_cred();
1839 return (struct dentry
*)cred
;
1840 parent
= dentry
->d_parent
;
1841 /* Protect against concurrent sillydeletes */
1842 nfs_block_sillyrename(parent
);
1843 state
= nfs4_do_open(dir
, &path
, fmode
, nd
->intent
.open
.flags
, &attr
, cred
);
1845 if (IS_ERR(state
)) {
1846 if (PTR_ERR(state
) == -ENOENT
) {
1847 d_add(dentry
, NULL
);
1848 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1850 nfs_unblock_sillyrename(parent
);
1851 return (struct dentry
*)state
;
1853 res
= d_add_unique(dentry
, igrab(state
->inode
));
1856 nfs_set_verifier(path
.dentry
, nfs_save_change_attribute(dir
));
1857 nfs_unblock_sillyrename(parent
);
1858 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
1863 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
1865 struct path path
= {
1866 .mnt
= nd
->path
.mnt
,
1869 struct rpc_cred
*cred
;
1870 struct nfs4_state
*state
;
1871 fmode_t fmode
= openflags
& (FMODE_READ
| FMODE_WRITE
);
1873 cred
= rpc_lookup_cred();
1875 return PTR_ERR(cred
);
1876 state
= nfs4_do_open(dir
, &path
, fmode
, openflags
, NULL
, cred
);
1878 if (IS_ERR(state
)) {
1879 switch (PTR_ERR(state
)) {
1885 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
1891 if (state
->inode
== dentry
->d_inode
) {
1892 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1893 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
1896 nfs4_close_sync(&path
, state
, fmode
);
1902 void nfs4_close_context(struct nfs_open_context
*ctx
, int is_sync
)
1904 if (ctx
->state
== NULL
)
1907 nfs4_close_sync(&ctx
->path
, ctx
->state
, ctx
->mode
);
1909 nfs4_close_state(&ctx
->path
, ctx
->state
, ctx
->mode
);
1912 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1914 struct nfs4_server_caps_arg args
= {
1917 struct nfs4_server_caps_res res
= {};
1918 struct rpc_message msg
= {
1919 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
1925 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
1927 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
1928 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
1929 server
->caps
|= NFS_CAP_ACLS
;
1930 if (res
.has_links
!= 0)
1931 server
->caps
|= NFS_CAP_HARDLINKS
;
1932 if (res
.has_symlinks
!= 0)
1933 server
->caps
|= NFS_CAP_SYMLINKS
;
1934 memcpy(server
->cache_consistency_bitmask
, res
.attr_bitmask
, sizeof(server
->cache_consistency_bitmask
));
1935 server
->cache_consistency_bitmask
[0] &= FATTR4_WORD0_CHANGE
|FATTR4_WORD0_SIZE
;
1936 server
->cache_consistency_bitmask
[1] &= FATTR4_WORD1_TIME_METADATA
|FATTR4_WORD1_TIME_MODIFY
;
1937 server
->acl_bitmask
= res
.acl_bitmask
;
1943 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1945 struct nfs4_exception exception
= { };
1948 err
= nfs4_handle_exception(server
,
1949 _nfs4_server_capabilities(server
, fhandle
),
1951 } while (exception
.retry
);
1955 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1956 struct nfs_fsinfo
*info
)
1958 struct nfs4_lookup_root_arg args
= {
1959 .bitmask
= nfs4_fattr_bitmap
,
1961 struct nfs4_lookup_res res
= {
1963 .fattr
= info
->fattr
,
1966 struct rpc_message msg
= {
1967 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1971 nfs_fattr_init(info
->fattr
);
1972 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
1975 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1976 struct nfs_fsinfo
*info
)
1978 struct nfs4_exception exception
= { };
1981 err
= nfs4_handle_exception(server
,
1982 _nfs4_lookup_root(server
, fhandle
, info
),
1984 } while (exception
.retry
);
1989 * get the file handle for the "/" directory on the server
1991 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1992 struct nfs_fsinfo
*info
)
1996 status
= nfs4_lookup_root(server
, fhandle
, info
);
1998 status
= nfs4_server_capabilities(server
, fhandle
);
2000 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
2001 return nfs4_map_errors(status
);
2005 * Get locations and (maybe) other attributes of a referral.
2006 * Note that we'll actually follow the referral later when
2007 * we detect fsid mismatch in inode revalidation
2009 static int nfs4_get_referral(struct inode
*dir
, const struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
2011 int status
= -ENOMEM
;
2012 struct page
*page
= NULL
;
2013 struct nfs4_fs_locations
*locations
= NULL
;
2015 page
= alloc_page(GFP_KERNEL
);
2018 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
2019 if (locations
== NULL
)
2022 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
2025 /* Make sure server returned a different fsid for the referral */
2026 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
2027 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__
, name
->name
);
2032 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
2033 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
2035 fattr
->mode
= S_IFDIR
;
2036 memset(fhandle
, 0, sizeof(struct nfs_fh
));
2045 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2047 struct nfs4_getattr_arg args
= {
2049 .bitmask
= server
->attr_bitmask
,
2051 struct nfs4_getattr_res res
= {
2055 struct rpc_message msg
= {
2056 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
2061 nfs_fattr_init(fattr
);
2062 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2065 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2067 struct nfs4_exception exception
= { };
2070 err
= nfs4_handle_exception(server
,
2071 _nfs4_proc_getattr(server
, fhandle
, fattr
),
2073 } while (exception
.retry
);
2078 * The file is not closed if it is opened due to the a request to change
2079 * the size of the file. The open call will not be needed once the
2080 * VFS layer lookup-intents are implemented.
2082 * Close is called when the inode is destroyed.
2083 * If we haven't opened the file for O_WRONLY, we
2084 * need to in the size_change case to obtain a stateid.
2087 * Because OPEN is always done by name in nfsv4, it is
2088 * possible that we opened a different file by the same
2089 * name. We can recognize this race condition, but we
2090 * can't do anything about it besides returning an error.
2092 * This will be fixed with VFS changes (lookup-intent).
2095 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
2096 struct iattr
*sattr
)
2098 struct inode
*inode
= dentry
->d_inode
;
2099 struct rpc_cred
*cred
= NULL
;
2100 struct nfs4_state
*state
= NULL
;
2103 nfs_fattr_init(fattr
);
2105 /* Search for an existing open(O_WRITE) file */
2106 if (sattr
->ia_valid
& ATTR_FILE
) {
2107 struct nfs_open_context
*ctx
;
2109 ctx
= nfs_file_open_context(sattr
->ia_file
);
2116 status
= nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
);
2118 nfs_setattr_update_inode(inode
, sattr
);
2122 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, const struct nfs_fh
*dirfh
,
2123 const struct qstr
*name
, struct nfs_fh
*fhandle
,
2124 struct nfs_fattr
*fattr
)
2127 struct nfs4_lookup_arg args
= {
2128 .bitmask
= server
->attr_bitmask
,
2132 struct nfs4_lookup_res res
= {
2137 struct rpc_message msg
= {
2138 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
2143 nfs_fattr_init(fattr
);
2145 dprintk("NFS call lookupfh %s\n", name
->name
);
2146 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2147 dprintk("NFS reply lookupfh: %d\n", status
);
2151 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
2152 struct qstr
*name
, struct nfs_fh
*fhandle
,
2153 struct nfs_fattr
*fattr
)
2155 struct nfs4_exception exception
= { };
2158 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
2160 if (err
== -NFS4ERR_MOVED
) {
2164 err
= nfs4_handle_exception(server
, err
, &exception
);
2165 } while (exception
.retry
);
2169 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
,
2170 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2174 dprintk("NFS call lookup %s\n", name
->name
);
2175 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
2176 if (status
== -NFS4ERR_MOVED
)
2177 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
2178 dprintk("NFS reply lookup: %d\n", status
);
2182 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2184 struct nfs4_exception exception
= { };
2187 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2188 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
2190 } while (exception
.retry
);
2194 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
2196 struct nfs_server
*server
= NFS_SERVER(inode
);
2197 struct nfs_fattr fattr
;
2198 struct nfs4_accessargs args
= {
2199 .fh
= NFS_FH(inode
),
2200 .bitmask
= server
->attr_bitmask
,
2202 struct nfs4_accessres res
= {
2206 struct rpc_message msg
= {
2207 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
2210 .rpc_cred
= entry
->cred
,
2212 int mode
= entry
->mask
;
2216 * Determine which access bits we want to ask for...
2218 if (mode
& MAY_READ
)
2219 args
.access
|= NFS4_ACCESS_READ
;
2220 if (S_ISDIR(inode
->i_mode
)) {
2221 if (mode
& MAY_WRITE
)
2222 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
2223 if (mode
& MAY_EXEC
)
2224 args
.access
|= NFS4_ACCESS_LOOKUP
;
2226 if (mode
& MAY_WRITE
)
2227 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
2228 if (mode
& MAY_EXEC
)
2229 args
.access
|= NFS4_ACCESS_EXECUTE
;
2231 nfs_fattr_init(&fattr
);
2232 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2235 if (res
.access
& NFS4_ACCESS_READ
)
2236 entry
->mask
|= MAY_READ
;
2237 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
2238 entry
->mask
|= MAY_WRITE
;
2239 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
2240 entry
->mask
|= MAY_EXEC
;
2241 nfs_refresh_inode(inode
, &fattr
);
2246 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
2248 struct nfs4_exception exception
= { };
2251 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2252 _nfs4_proc_access(inode
, entry
),
2254 } while (exception
.retry
);
2259 * TODO: For the time being, we don't try to get any attributes
2260 * along with any of the zero-copy operations READ, READDIR,
2263 * In the case of the first three, we want to put the GETATTR
2264 * after the read-type operation -- this is because it is hard
2265 * to predict the length of a GETATTR response in v4, and thus
2266 * align the READ data correctly. This means that the GETATTR
2267 * may end up partially falling into the page cache, and we should
2268 * shift it into the 'tail' of the xdr_buf before processing.
2269 * To do this efficiently, we need to know the total length
2270 * of data received, which doesn't seem to be available outside
2273 * In the case of WRITE, we also want to put the GETATTR after
2274 * the operation -- in this case because we want to make sure
2275 * we get the post-operation mtime and size. This means that
2276 * we can't use xdr_encode_pages() as written: we need a variant
2277 * of it which would leave room in the 'tail' iovec.
2279 * Both of these changes to the XDR layer would in fact be quite
2280 * minor, but I decided to leave them for a subsequent patch.
2282 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2283 unsigned int pgbase
, unsigned int pglen
)
2285 struct nfs4_readlink args
= {
2286 .fh
= NFS_FH(inode
),
2291 struct nfs4_readlink_res res
;
2292 struct rpc_message msg
= {
2293 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
2298 return nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
2301 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2302 unsigned int pgbase
, unsigned int pglen
)
2304 struct nfs4_exception exception
= { };
2307 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2308 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
2310 } while (exception
.retry
);
2316 * We will need to arrange for the VFS layer to provide an atomic open.
2317 * Until then, this create/open method is prone to inefficiency and race
2318 * conditions due to the lookup, create, and open VFS calls from sys_open()
2319 * placed on the wire.
2321 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2322 * The file will be opened again in the subsequent VFS open call
2323 * (nfs4_proc_file_open).
2325 * The open for read will just hang around to be used by any process that
2326 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2330 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
2331 int flags
, struct nameidata
*nd
)
2333 struct path path
= {
2334 .mnt
= nd
->path
.mnt
,
2337 struct nfs4_state
*state
;
2338 struct rpc_cred
*cred
;
2339 fmode_t fmode
= flags
& (FMODE_READ
| FMODE_WRITE
);
2342 cred
= rpc_lookup_cred();
2344 status
= PTR_ERR(cred
);
2347 state
= nfs4_do_open(dir
, &path
, fmode
, flags
, sattr
, cred
);
2349 if (IS_ERR(state
)) {
2350 status
= PTR_ERR(state
);
2353 d_add(dentry
, igrab(state
->inode
));
2354 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2355 if (flags
& O_EXCL
) {
2356 struct nfs_fattr fattr
;
2357 status
= nfs4_do_setattr(state
->inode
, cred
, &fattr
, sattr
, state
);
2359 nfs_setattr_update_inode(state
->inode
, sattr
);
2360 nfs_post_op_update_inode(state
->inode
, &fattr
);
2362 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
2363 status
= nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2365 nfs4_close_sync(&path
, state
, fmode
);
2372 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2374 struct nfs_server
*server
= NFS_SERVER(dir
);
2375 struct nfs_removeargs args
= {
2377 .name
.len
= name
->len
,
2378 .name
.name
= name
->name
,
2379 .bitmask
= server
->attr_bitmask
,
2381 struct nfs_removeres res
= {
2384 struct rpc_message msg
= {
2385 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
2391 nfs_fattr_init(&res
.dir_attr
);
2392 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 1);
2394 update_changeattr(dir
, &res
.cinfo
);
2395 nfs_post_op_update_inode(dir
, &res
.dir_attr
);
2400 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2402 struct nfs4_exception exception
= { };
2405 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2406 _nfs4_proc_remove(dir
, name
),
2408 } while (exception
.retry
);
2412 static void nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct inode
*dir
)
2414 struct nfs_server
*server
= NFS_SERVER(dir
);
2415 struct nfs_removeargs
*args
= msg
->rpc_argp
;
2416 struct nfs_removeres
*res
= msg
->rpc_resp
;
2418 args
->bitmask
= server
->cache_consistency_bitmask
;
2419 res
->server
= server
;
2420 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
2423 static int nfs4_proc_unlink_done(struct rpc_task
*task
, struct inode
*dir
)
2425 struct nfs_removeres
*res
= task
->tk_msg
.rpc_resp
;
2427 if (nfs4_async_handle_error(task
, res
->server
, NULL
) == -EAGAIN
)
2429 update_changeattr(dir
, &res
->cinfo
);
2430 nfs_post_op_update_inode(dir
, &res
->dir_attr
);
2434 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2435 struct inode
*new_dir
, struct qstr
*new_name
)
2437 struct nfs_server
*server
= NFS_SERVER(old_dir
);
2438 struct nfs4_rename_arg arg
= {
2439 .old_dir
= NFS_FH(old_dir
),
2440 .new_dir
= NFS_FH(new_dir
),
2441 .old_name
= old_name
,
2442 .new_name
= new_name
,
2443 .bitmask
= server
->attr_bitmask
,
2445 struct nfs_fattr old_fattr
, new_fattr
;
2446 struct nfs4_rename_res res
= {
2448 .old_fattr
= &old_fattr
,
2449 .new_fattr
= &new_fattr
,
2451 struct rpc_message msg
= {
2452 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2458 nfs_fattr_init(res
.old_fattr
);
2459 nfs_fattr_init(res
.new_fattr
);
2460 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2463 update_changeattr(old_dir
, &res
.old_cinfo
);
2464 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2465 update_changeattr(new_dir
, &res
.new_cinfo
);
2466 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2471 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2472 struct inode
*new_dir
, struct qstr
*new_name
)
2474 struct nfs4_exception exception
= { };
2477 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2478 _nfs4_proc_rename(old_dir
, old_name
,
2481 } while (exception
.retry
);
2485 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2487 struct nfs_server
*server
= NFS_SERVER(inode
);
2488 struct nfs4_link_arg arg
= {
2489 .fh
= NFS_FH(inode
),
2490 .dir_fh
= NFS_FH(dir
),
2492 .bitmask
= server
->attr_bitmask
,
2494 struct nfs_fattr fattr
, dir_attr
;
2495 struct nfs4_link_res res
= {
2498 .dir_attr
= &dir_attr
,
2500 struct rpc_message msg
= {
2501 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2507 nfs_fattr_init(res
.fattr
);
2508 nfs_fattr_init(res
.dir_attr
);
2509 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2511 update_changeattr(dir
, &res
.cinfo
);
2512 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2513 nfs_post_op_update_inode(inode
, res
.fattr
);
2519 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2521 struct nfs4_exception exception
= { };
2524 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2525 _nfs4_proc_link(inode
, dir
, name
),
2527 } while (exception
.retry
);
2531 struct nfs4_createdata
{
2532 struct rpc_message msg
;
2533 struct nfs4_create_arg arg
;
2534 struct nfs4_create_res res
;
2536 struct nfs_fattr fattr
;
2537 struct nfs_fattr dir_fattr
;
2540 static struct nfs4_createdata
*nfs4_alloc_createdata(struct inode
*dir
,
2541 struct qstr
*name
, struct iattr
*sattr
, u32 ftype
)
2543 struct nfs4_createdata
*data
;
2545 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
2547 struct nfs_server
*server
= NFS_SERVER(dir
);
2549 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
];
2550 data
->msg
.rpc_argp
= &data
->arg
;
2551 data
->msg
.rpc_resp
= &data
->res
;
2552 data
->arg
.dir_fh
= NFS_FH(dir
);
2553 data
->arg
.server
= server
;
2554 data
->arg
.name
= name
;
2555 data
->arg
.attrs
= sattr
;
2556 data
->arg
.ftype
= ftype
;
2557 data
->arg
.bitmask
= server
->attr_bitmask
;
2558 data
->res
.server
= server
;
2559 data
->res
.fh
= &data
->fh
;
2560 data
->res
.fattr
= &data
->fattr
;
2561 data
->res
.dir_fattr
= &data
->dir_fattr
;
2562 nfs_fattr_init(data
->res
.fattr
);
2563 nfs_fattr_init(data
->res
.dir_fattr
);
2568 static int nfs4_do_create(struct inode
*dir
, struct dentry
*dentry
, struct nfs4_createdata
*data
)
2570 int status
= nfs4_call_sync(NFS_SERVER(dir
), &data
->msg
,
2571 &data
->arg
, &data
->res
, 1);
2573 update_changeattr(dir
, &data
->res
.dir_cinfo
);
2574 nfs_post_op_update_inode(dir
, data
->res
.dir_fattr
);
2575 status
= nfs_instantiate(dentry
, data
->res
.fh
, data
->res
.fattr
);
2580 static void nfs4_free_createdata(struct nfs4_createdata
*data
)
2585 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2586 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2588 struct nfs4_createdata
*data
;
2589 int status
= -ENAMETOOLONG
;
2591 if (len
> NFS4_MAXPATHLEN
)
2595 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4LNK
);
2599 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
];
2600 data
->arg
.u
.symlink
.pages
= &page
;
2601 data
->arg
.u
.symlink
.len
= len
;
2603 status
= nfs4_do_create(dir
, dentry
, data
);
2605 nfs4_free_createdata(data
);
2610 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2611 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2613 struct nfs4_exception exception
= { };
2616 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2617 _nfs4_proc_symlink(dir
, dentry
, page
,
2620 } while (exception
.retry
);
2624 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2625 struct iattr
*sattr
)
2627 struct nfs4_createdata
*data
;
2628 int status
= -ENOMEM
;
2630 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4DIR
);
2634 status
= nfs4_do_create(dir
, dentry
, data
);
2636 nfs4_free_createdata(data
);
2641 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2642 struct iattr
*sattr
)
2644 struct nfs4_exception exception
= { };
2647 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2648 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2650 } while (exception
.retry
);
2654 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2655 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2657 struct inode
*dir
= dentry
->d_inode
;
2658 struct nfs4_readdir_arg args
= {
2663 .bitmask
= NFS_SERVER(dentry
->d_inode
)->cache_consistency_bitmask
,
2665 struct nfs4_readdir_res res
;
2666 struct rpc_message msg
= {
2667 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2674 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__
,
2675 dentry
->d_parent
->d_name
.name
,
2676 dentry
->d_name
.name
,
2677 (unsigned long long)cookie
);
2678 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2679 res
.pgbase
= args
.pgbase
;
2680 status
= nfs4_call_sync(NFS_SERVER(dir
), &msg
, &args
, &res
, 0);
2682 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2684 nfs_invalidate_atime(dir
);
2686 dprintk("%s: returns %d\n", __func__
, status
);
2690 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2691 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2693 struct nfs4_exception exception
= { };
2696 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2697 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2700 } while (exception
.retry
);
2704 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2705 struct iattr
*sattr
, dev_t rdev
)
2707 struct nfs4_createdata
*data
;
2708 int mode
= sattr
->ia_mode
;
2709 int status
= -ENOMEM
;
2711 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2712 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2714 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4SOCK
);
2719 data
->arg
.ftype
= NF4FIFO
;
2720 else if (S_ISBLK(mode
)) {
2721 data
->arg
.ftype
= NF4BLK
;
2722 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2723 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2725 else if (S_ISCHR(mode
)) {
2726 data
->arg
.ftype
= NF4CHR
;
2727 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2728 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2731 status
= nfs4_do_create(dir
, dentry
, data
);
2733 nfs4_free_createdata(data
);
2738 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2739 struct iattr
*sattr
, dev_t rdev
)
2741 struct nfs4_exception exception
= { };
2744 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2745 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2747 } while (exception
.retry
);
2751 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2752 struct nfs_fsstat
*fsstat
)
2754 struct nfs4_statfs_arg args
= {
2756 .bitmask
= server
->attr_bitmask
,
2758 struct nfs4_statfs_res res
= {
2761 struct rpc_message msg
= {
2762 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2767 nfs_fattr_init(fsstat
->fattr
);
2768 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2771 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2773 struct nfs4_exception exception
= { };
2776 err
= nfs4_handle_exception(server
,
2777 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2779 } while (exception
.retry
);
2783 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2784 struct nfs_fsinfo
*fsinfo
)
2786 struct nfs4_fsinfo_arg args
= {
2788 .bitmask
= server
->attr_bitmask
,
2790 struct nfs4_fsinfo_res res
= {
2793 struct rpc_message msg
= {
2794 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
2799 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2802 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2804 struct nfs4_exception exception
= { };
2808 err
= nfs4_handle_exception(server
,
2809 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2811 } while (exception
.retry
);
2815 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2817 nfs_fattr_init(fsinfo
->fattr
);
2818 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2821 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2822 struct nfs_pathconf
*pathconf
)
2824 struct nfs4_pathconf_arg args
= {
2826 .bitmask
= server
->attr_bitmask
,
2828 struct nfs4_pathconf_res res
= {
2829 .pathconf
= pathconf
,
2831 struct rpc_message msg
= {
2832 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2837 /* None of the pathconf attributes are mandatory to implement */
2838 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2839 memset(pathconf
, 0, sizeof(*pathconf
));
2843 nfs_fattr_init(pathconf
->fattr
);
2844 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2847 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2848 struct nfs_pathconf
*pathconf
)
2850 struct nfs4_exception exception
= { };
2854 err
= nfs4_handle_exception(server
,
2855 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2857 } while (exception
.retry
);
2861 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
2863 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2865 if (nfs4_async_handle_error(task
, server
, data
->args
.context
->state
) == -EAGAIN
) {
2866 rpc_restart_call(task
);
2870 nfs_invalidate_atime(data
->inode
);
2871 if (task
->tk_status
> 0)
2872 renew_lease(server
, data
->timestamp
);
2876 static void nfs4_proc_read_setup(struct nfs_read_data
*data
, struct rpc_message
*msg
)
2878 data
->timestamp
= jiffies
;
2879 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
];
2882 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2884 struct inode
*inode
= data
->inode
;
2886 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), data
->args
.context
->state
) == -EAGAIN
) {
2887 rpc_restart_call(task
);
2890 if (task
->tk_status
>= 0) {
2891 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2892 nfs_post_op_update_inode_force_wcc(inode
, data
->res
.fattr
);
2897 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
2899 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2901 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
2902 data
->res
.server
= server
;
2903 data
->timestamp
= jiffies
;
2905 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
];
2908 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2910 struct inode
*inode
= data
->inode
;
2912 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), NULL
) == -EAGAIN
) {
2913 rpc_restart_call(task
);
2916 nfs_refresh_inode(inode
, data
->res
.fattr
);
2920 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
2922 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2924 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
2925 data
->res
.server
= server
;
2926 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
];
2930 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2931 * standalone procedure for queueing an asynchronous RENEW.
2933 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
2935 struct nfs_client
*clp
= (struct nfs_client
*)task
->tk_msg
.rpc_argp
;
2936 unsigned long timestamp
= (unsigned long)data
;
2938 if (task
->tk_status
< 0) {
2939 /* Unless we're shutting down, schedule state recovery! */
2940 if (test_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
) != 0)
2941 nfs4_schedule_state_recovery(clp
);
2944 spin_lock(&clp
->cl_lock
);
2945 if (time_before(clp
->cl_last_renewal
,timestamp
))
2946 clp
->cl_last_renewal
= timestamp
;
2947 spin_unlock(&clp
->cl_lock
);
2950 static const struct rpc_call_ops nfs4_renew_ops
= {
2951 .rpc_call_done
= nfs4_renew_done
,
2954 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2956 struct rpc_message msg
= {
2957 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2962 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2963 &nfs4_renew_ops
, (void *)jiffies
);
2966 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2968 struct rpc_message msg
= {
2969 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2973 unsigned long now
= jiffies
;
2976 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2979 spin_lock(&clp
->cl_lock
);
2980 if (time_before(clp
->cl_last_renewal
,now
))
2981 clp
->cl_last_renewal
= now
;
2982 spin_unlock(&clp
->cl_lock
);
2986 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2988 return (server
->caps
& NFS_CAP_ACLS
)
2989 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2990 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2993 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2994 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2997 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2999 static void buf_to_pages(const void *buf
, size_t buflen
,
3000 struct page
**pages
, unsigned int *pgbase
)
3002 const void *p
= buf
;
3004 *pgbase
= offset_in_page(buf
);
3006 while (p
< buf
+ buflen
) {
3007 *(pages
++) = virt_to_page(p
);
3008 p
+= PAGE_CACHE_SIZE
;
3012 struct nfs4_cached_acl
{
3018 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
3020 struct nfs_inode
*nfsi
= NFS_I(inode
);
3022 spin_lock(&inode
->i_lock
);
3023 kfree(nfsi
->nfs4_acl
);
3024 nfsi
->nfs4_acl
= acl
;
3025 spin_unlock(&inode
->i_lock
);
3028 static void nfs4_zap_acl_attr(struct inode
*inode
)
3030 nfs4_set_cached_acl(inode
, NULL
);
3033 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
3035 struct nfs_inode
*nfsi
= NFS_I(inode
);
3036 struct nfs4_cached_acl
*acl
;
3039 spin_lock(&inode
->i_lock
);
3040 acl
= nfsi
->nfs4_acl
;
3043 if (buf
== NULL
) /* user is just asking for length */
3045 if (acl
->cached
== 0)
3047 ret
= -ERANGE
; /* see getxattr(2) man page */
3048 if (acl
->len
> buflen
)
3050 memcpy(buf
, acl
->data
, acl
->len
);
3054 spin_unlock(&inode
->i_lock
);
3058 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
3060 struct nfs4_cached_acl
*acl
;
3062 if (buf
&& acl_len
<= PAGE_SIZE
) {
3063 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
3067 memcpy(acl
->data
, buf
, acl_len
);
3069 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
3076 nfs4_set_cached_acl(inode
, acl
);
3079 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3081 struct page
*pages
[NFS4ACL_MAXPAGES
];
3082 struct nfs_getaclargs args
= {
3083 .fh
= NFS_FH(inode
),
3087 struct nfs_getaclres res
= {
3091 struct rpc_message msg
= {
3092 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
3096 struct page
*localpage
= NULL
;
3099 if (buflen
< PAGE_SIZE
) {
3100 /* As long as we're doing a round trip to the server anyway,
3101 * let's be prepared for a page of acl data. */
3102 localpage
= alloc_page(GFP_KERNEL
);
3103 resp_buf
= page_address(localpage
);
3104 if (localpage
== NULL
)
3106 args
.acl_pages
[0] = localpage
;
3107 args
.acl_pgbase
= 0;
3108 args
.acl_len
= PAGE_SIZE
;
3111 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
3113 ret
= nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
3116 if (res
.acl_len
> args
.acl_len
)
3117 nfs4_write_cached_acl(inode
, NULL
, res
.acl_len
);
3119 nfs4_write_cached_acl(inode
, resp_buf
, res
.acl_len
);
3122 if (res
.acl_len
> buflen
)
3125 memcpy(buf
, resp_buf
, res
.acl_len
);
3130 __free_page(localpage
);
3134 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3136 struct nfs4_exception exception
= { };
3139 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
3142 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
3143 } while (exception
.retry
);
3147 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
3149 struct nfs_server
*server
= NFS_SERVER(inode
);
3152 if (!nfs4_server_supports_acls(server
))
3154 ret
= nfs_revalidate_inode(server
, inode
);
3157 if (NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ACL
)
3158 nfs_zap_acl_cache(inode
);
3159 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
3162 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
3165 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3167 struct nfs_server
*server
= NFS_SERVER(inode
);
3168 struct page
*pages
[NFS4ACL_MAXPAGES
];
3169 struct nfs_setaclargs arg
= {
3170 .fh
= NFS_FH(inode
),
3174 struct nfs_setaclres res
;
3175 struct rpc_message msg
= {
3176 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
3182 if (!nfs4_server_supports_acls(server
))
3184 nfs_inode_return_delegation(inode
);
3185 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
3186 ret
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
3187 nfs_access_zap_cache(inode
);
3188 nfs_zap_acl_cache(inode
);
3192 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3194 struct nfs4_exception exception
= { };
3197 err
= nfs4_handle_exception(NFS_SERVER(inode
),
3198 __nfs4_proc_set_acl(inode
, buf
, buflen
),
3200 } while (exception
.retry
);
3205 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs4_state
*state
)
3207 struct nfs_client
*clp
= server
->nfs_client
;
3209 if (!clp
|| task
->tk_status
>= 0)
3211 switch(task
->tk_status
) {
3212 case -NFS4ERR_ADMIN_REVOKED
:
3213 case -NFS4ERR_BAD_STATEID
:
3214 case -NFS4ERR_OPENMODE
:
3217 nfs4_state_mark_reclaim_nograce(clp
, state
);
3218 case -NFS4ERR_STALE_CLIENTID
:
3219 case -NFS4ERR_STALE_STATEID
:
3220 case -NFS4ERR_EXPIRED
:
3221 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
);
3222 nfs4_schedule_state_recovery(clp
);
3223 if (test_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) == 0)
3224 rpc_wake_up_queued_task(&clp
->cl_rpcwaitq
, task
);
3225 task
->tk_status
= 0;
3227 case -NFS4ERR_DELAY
:
3228 nfs_inc_server_stats(server
, NFSIOS_DELAY
);
3229 case -NFS4ERR_GRACE
:
3230 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
3231 task
->tk_status
= 0;
3233 case -NFS4ERR_OLD_STATEID
:
3234 task
->tk_status
= 0;
3237 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
3241 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
3243 nfs4_verifier sc_verifier
;
3244 struct nfs4_setclientid setclientid
= {
3245 .sc_verifier
= &sc_verifier
,
3248 struct rpc_message msg
= {
3249 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
3250 .rpc_argp
= &setclientid
,
3258 p
= (__be32
*)sc_verifier
.data
;
3259 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
3260 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
3263 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
3264 sizeof(setclientid
.sc_name
), "%s/%s %s %s %u",
3266 rpc_peeraddr2str(clp
->cl_rpcclient
,
3268 rpc_peeraddr2str(clp
->cl_rpcclient
,
3270 clp
->cl_rpcclient
->cl_auth
->au_ops
->au_name
,
3271 clp
->cl_id_uniquifier
);
3272 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
3273 sizeof(setclientid
.sc_netid
),
3274 rpc_peeraddr2str(clp
->cl_rpcclient
,
3275 RPC_DISPLAY_NETID
));
3276 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
3277 sizeof(setclientid
.sc_uaddr
), "%s.%u.%u",
3278 clp
->cl_ipaddr
, port
>> 8, port
& 255);
3280 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3281 if (status
!= -NFS4ERR_CLID_INUSE
)
3286 ssleep(clp
->cl_lease_time
+ 1);
3288 if (++clp
->cl_id_uniquifier
== 0)
3294 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3296 struct nfs_fsinfo fsinfo
;
3297 struct rpc_message msg
= {
3298 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
3300 .rpc_resp
= &fsinfo
,
3307 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3309 spin_lock(&clp
->cl_lock
);
3310 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
3311 clp
->cl_last_renewal
= now
;
3312 spin_unlock(&clp
->cl_lock
);
3317 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3322 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
3326 case -NFS4ERR_RESOURCE
:
3327 /* The IBM lawyers misread another document! */
3328 case -NFS4ERR_DELAY
:
3329 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
3335 struct nfs4_delegreturndata
{
3336 struct nfs4_delegreturnargs args
;
3337 struct nfs4_delegreturnres res
;
3339 nfs4_stateid stateid
;
3340 unsigned long timestamp
;
3341 struct nfs_fattr fattr
;
3345 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3347 struct nfs4_delegreturndata
*data
= calldata
;
3348 data
->rpc_status
= task
->tk_status
;
3349 if (data
->rpc_status
== 0)
3350 renew_lease(data
->res
.server
, data
->timestamp
);
3353 static void nfs4_delegreturn_release(void *calldata
)
3358 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3359 .rpc_call_done
= nfs4_delegreturn_done
,
3360 .rpc_release
= nfs4_delegreturn_release
,
3363 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3365 struct nfs4_delegreturndata
*data
;
3366 struct nfs_server
*server
= NFS_SERVER(inode
);
3367 struct rpc_task
*task
;
3368 struct rpc_message msg
= {
3369 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3372 struct rpc_task_setup task_setup_data
= {
3373 .rpc_client
= server
->client
,
3374 .rpc_message
= &msg
,
3375 .callback_ops
= &nfs4_delegreturn_ops
,
3376 .flags
= RPC_TASK_ASYNC
,
3380 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3383 data
->args
.fhandle
= &data
->fh
;
3384 data
->args
.stateid
= &data
->stateid
;
3385 data
->args
.bitmask
= server
->attr_bitmask
;
3386 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3387 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3388 data
->res
.fattr
= &data
->fattr
;
3389 data
->res
.server
= server
;
3390 data
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3391 nfs_fattr_init(data
->res
.fattr
);
3392 data
->timestamp
= jiffies
;
3393 data
->rpc_status
= 0;
3395 task_setup_data
.callback_data
= data
;
3396 msg
.rpc_argp
= &data
->args
,
3397 msg
.rpc_resp
= &data
->res
,
3398 task
= rpc_run_task(&task_setup_data
);
3400 return PTR_ERR(task
);
3403 status
= nfs4_wait_for_completion_rpc_task(task
);
3406 status
= data
->rpc_status
;
3409 nfs_refresh_inode(inode
, &data
->fattr
);
3415 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3417 struct nfs_server
*server
= NFS_SERVER(inode
);
3418 struct nfs4_exception exception
= { };
3421 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
, issync
);
3423 case -NFS4ERR_STALE_STATEID
:
3424 case -NFS4ERR_EXPIRED
:
3428 err
= nfs4_handle_exception(server
, err
, &exception
);
3429 } while (exception
.retry
);
3433 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3434 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3437 * sleep, with exponential backoff, and retry the LOCK operation.
3439 static unsigned long
3440 nfs4_set_lock_task_retry(unsigned long timeout
)
3442 schedule_timeout_killable(timeout
);
3444 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3445 return NFS4_LOCK_MAXTIMEOUT
;
3449 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3451 struct inode
*inode
= state
->inode
;
3452 struct nfs_server
*server
= NFS_SERVER(inode
);
3453 struct nfs_client
*clp
= server
->nfs_client
;
3454 struct nfs_lockt_args arg
= {
3455 .fh
= NFS_FH(inode
),
3458 struct nfs_lockt_res res
= {
3461 struct rpc_message msg
= {
3462 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3465 .rpc_cred
= state
->owner
->so_cred
,
3467 struct nfs4_lock_state
*lsp
;
3470 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3471 status
= nfs4_set_lock_state(state
, request
);
3474 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3475 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3476 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
3479 request
->fl_type
= F_UNLCK
;
3481 case -NFS4ERR_DENIED
:
3484 request
->fl_ops
->fl_release_private(request
);
3489 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3491 struct nfs4_exception exception
= { };
3495 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3496 _nfs4_proc_getlk(state
, cmd
, request
),
3498 } while (exception
.retry
);
3502 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3505 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3507 res
= posix_lock_file_wait(file
, fl
);
3510 res
= flock_lock_file_wait(file
, fl
);
3518 struct nfs4_unlockdata
{
3519 struct nfs_locku_args arg
;
3520 struct nfs_locku_res res
;
3521 struct nfs4_lock_state
*lsp
;
3522 struct nfs_open_context
*ctx
;
3523 struct file_lock fl
;
3524 const struct nfs_server
*server
;
3525 unsigned long timestamp
;
3528 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3529 struct nfs_open_context
*ctx
,
3530 struct nfs4_lock_state
*lsp
,
3531 struct nfs_seqid
*seqid
)
3533 struct nfs4_unlockdata
*p
;
3534 struct inode
*inode
= lsp
->ls_state
->inode
;
3536 p
= kmalloc(sizeof(*p
), GFP_KERNEL
);
3539 p
->arg
.fh
= NFS_FH(inode
);
3541 p
->arg
.seqid
= seqid
;
3542 p
->res
.seqid
= seqid
;
3543 p
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3544 p
->arg
.stateid
= &lsp
->ls_stateid
;
3546 atomic_inc(&lsp
->ls_count
);
3547 /* Ensure we don't close file until we're done freeing locks! */
3548 p
->ctx
= get_nfs_open_context(ctx
);
3549 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3550 p
->server
= NFS_SERVER(inode
);
3554 static void nfs4_locku_release_calldata(void *data
)
3556 struct nfs4_unlockdata
*calldata
= data
;
3557 nfs_free_seqid(calldata
->arg
.seqid
);
3558 nfs4_put_lock_state(calldata
->lsp
);
3559 put_nfs_open_context(calldata
->ctx
);
3563 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3565 struct nfs4_unlockdata
*calldata
= data
;
3567 if (RPC_ASSASSINATED(task
))
3569 switch (task
->tk_status
) {
3571 memcpy(calldata
->lsp
->ls_stateid
.data
,
3572 calldata
->res
.stateid
.data
,
3573 sizeof(calldata
->lsp
->ls_stateid
.data
));
3574 renew_lease(calldata
->server
, calldata
->timestamp
);
3576 case -NFS4ERR_BAD_STATEID
:
3577 case -NFS4ERR_OLD_STATEID
:
3578 case -NFS4ERR_STALE_STATEID
:
3579 case -NFS4ERR_EXPIRED
:
3582 if (nfs4_async_handle_error(task
, calldata
->server
, NULL
) == -EAGAIN
)
3583 rpc_restart_call(task
);
3587 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3589 struct nfs4_unlockdata
*calldata
= data
;
3591 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3593 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3594 /* Note: exit _without_ running nfs4_locku_done */
3595 task
->tk_action
= NULL
;
3598 calldata
->timestamp
= jiffies
;
3599 rpc_call_start(task
);
3602 static const struct rpc_call_ops nfs4_locku_ops
= {
3603 .rpc_call_prepare
= nfs4_locku_prepare
,
3604 .rpc_call_done
= nfs4_locku_done
,
3605 .rpc_release
= nfs4_locku_release_calldata
,
3608 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3609 struct nfs_open_context
*ctx
,
3610 struct nfs4_lock_state
*lsp
,
3611 struct nfs_seqid
*seqid
)
3613 struct nfs4_unlockdata
*data
;
3614 struct rpc_message msg
= {
3615 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3616 .rpc_cred
= ctx
->cred
,
3618 struct rpc_task_setup task_setup_data
= {
3619 .rpc_client
= NFS_CLIENT(lsp
->ls_state
->inode
),
3620 .rpc_message
= &msg
,
3621 .callback_ops
= &nfs4_locku_ops
,
3622 .workqueue
= nfsiod_workqueue
,
3623 .flags
= RPC_TASK_ASYNC
,
3626 /* Ensure this is an unlock - when canceling a lock, the
3627 * canceled lock is passed in, and it won't be an unlock.
3629 fl
->fl_type
= F_UNLCK
;
3631 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3633 nfs_free_seqid(seqid
);
3634 return ERR_PTR(-ENOMEM
);
3637 msg
.rpc_argp
= &data
->arg
,
3638 msg
.rpc_resp
= &data
->res
,
3639 task_setup_data
.callback_data
= data
;
3640 return rpc_run_task(&task_setup_data
);
3643 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3645 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3646 struct nfs_seqid
*seqid
;
3647 struct nfs4_lock_state
*lsp
;
3648 struct rpc_task
*task
;
3650 unsigned char fl_flags
= request
->fl_flags
;
3652 status
= nfs4_set_lock_state(state
, request
);
3653 /* Unlock _before_ we do the RPC call */
3654 request
->fl_flags
|= FL_EXISTS
;
3655 down_read(&nfsi
->rwsem
);
3656 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
) {
3657 up_read(&nfsi
->rwsem
);
3660 up_read(&nfsi
->rwsem
);
3663 /* Is this a delegated lock? */
3664 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3666 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3667 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3671 task
= nfs4_do_unlck(request
, nfs_file_open_context(request
->fl_file
), lsp
, seqid
);
3672 status
= PTR_ERR(task
);
3675 status
= nfs4_wait_for_completion_rpc_task(task
);
3678 request
->fl_flags
= fl_flags
;
3682 struct nfs4_lockdata
{
3683 struct nfs_lock_args arg
;
3684 struct nfs_lock_res res
;
3685 struct nfs4_lock_state
*lsp
;
3686 struct nfs_open_context
*ctx
;
3687 struct file_lock fl
;
3688 unsigned long timestamp
;
3691 struct nfs_server
*server
;
3694 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
3695 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
3697 struct nfs4_lockdata
*p
;
3698 struct inode
*inode
= lsp
->ls_state
->inode
;
3699 struct nfs_server
*server
= NFS_SERVER(inode
);
3701 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3705 p
->arg
.fh
= NFS_FH(inode
);
3707 p
->arg
.open_seqid
= nfs_alloc_seqid(&lsp
->ls_state
->owner
->so_seqid
);
3708 if (p
->arg
.open_seqid
== NULL
)
3710 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3711 if (p
->arg
.lock_seqid
== NULL
)
3712 goto out_free_seqid
;
3713 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
3714 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
3715 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3716 p
->res
.lock_seqid
= p
->arg
.lock_seqid
;
3717 p
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3720 atomic_inc(&lsp
->ls_count
);
3721 p
->ctx
= get_nfs_open_context(ctx
);
3722 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3725 nfs_free_seqid(p
->arg
.open_seqid
);
3731 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
3733 struct nfs4_lockdata
*data
= calldata
;
3734 struct nfs4_state
*state
= data
->lsp
->ls_state
;
3736 dprintk("%s: begin!\n", __func__
);
3737 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
3739 /* Do we need to do an open_to_lock_owner? */
3740 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
3741 if (nfs_wait_on_sequence(data
->arg
.open_seqid
, task
) != 0)
3743 data
->arg
.open_stateid
= &state
->stateid
;
3744 data
->arg
.new_lock_owner
= 1;
3745 data
->res
.open_seqid
= data
->arg
.open_seqid
;
3747 data
->arg
.new_lock_owner
= 0;
3748 data
->timestamp
= jiffies
;
3749 if (nfs4_setup_sequence(data
->server
->nfs_client
, &data
->arg
.seq_args
,
3750 &data
->res
.seq_res
, 1, task
))
3752 rpc_call_start(task
);
3753 dprintk("%s: done!, ret = %d\n", __func__
, data
->rpc_status
);
3756 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
3758 struct nfs4_lockdata
*data
= calldata
;
3760 dprintk("%s: begin!\n", __func__
);
3762 nfs4_sequence_done_free_slot(data
->server
, &data
->res
.seq_res
,
3765 data
->rpc_status
= task
->tk_status
;
3766 if (RPC_ASSASSINATED(task
))
3768 if (data
->arg
.new_lock_owner
!= 0) {
3769 if (data
->rpc_status
== 0)
3770 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
3774 if (data
->rpc_status
== 0) {
3775 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
3776 sizeof(data
->lsp
->ls_stateid
.data
));
3777 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
3778 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
3781 dprintk("%s: done, ret = %d!\n", __func__
, data
->rpc_status
);
3784 static void nfs4_lock_release(void *calldata
)
3786 struct nfs4_lockdata
*data
= calldata
;
3788 dprintk("%s: begin!\n", __func__
);
3789 nfs_free_seqid(data
->arg
.open_seqid
);
3790 if (data
->cancelled
!= 0) {
3791 struct rpc_task
*task
;
3792 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
3793 data
->arg
.lock_seqid
);
3796 dprintk("%s: cancelling lock!\n", __func__
);
3798 nfs_free_seqid(data
->arg
.lock_seqid
);
3799 nfs4_put_lock_state(data
->lsp
);
3800 put_nfs_open_context(data
->ctx
);
3802 dprintk("%s: done!\n", __func__
);
3805 static const struct rpc_call_ops nfs4_lock_ops
= {
3806 .rpc_call_prepare
= nfs4_lock_prepare
,
3807 .rpc_call_done
= nfs4_lock_done
,
3808 .rpc_release
= nfs4_lock_release
,
3811 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int reclaim
)
3813 struct nfs4_lockdata
*data
;
3814 struct rpc_task
*task
;
3815 struct rpc_message msg
= {
3816 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
3817 .rpc_cred
= state
->owner
->so_cred
,
3819 struct rpc_task_setup task_setup_data
= {
3820 .rpc_client
= NFS_CLIENT(state
->inode
),
3821 .rpc_message
= &msg
,
3822 .callback_ops
= &nfs4_lock_ops
,
3823 .workqueue
= nfsiod_workqueue
,
3824 .flags
= RPC_TASK_ASYNC
,
3828 dprintk("%s: begin!\n", __func__
);
3829 data
= nfs4_alloc_lockdata(fl
, nfs_file_open_context(fl
->fl_file
),
3830 fl
->fl_u
.nfs4_fl
.owner
);
3834 data
->arg
.block
= 1;
3836 data
->arg
.reclaim
= 1;
3837 msg
.rpc_argp
= &data
->arg
,
3838 msg
.rpc_resp
= &data
->res
,
3839 task_setup_data
.callback_data
= data
;
3840 task
= rpc_run_task(&task_setup_data
);
3842 return PTR_ERR(task
);
3843 ret
= nfs4_wait_for_completion_rpc_task(task
);
3845 ret
= data
->rpc_status
;
3846 if (ret
== -NFS4ERR_DENIED
)
3849 data
->cancelled
= 1;
3851 dprintk("%s: done, ret = %d!\n", __func__
, ret
);
3855 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
3857 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3858 struct nfs4_exception exception
= { };
3862 /* Cache the lock if possible... */
3863 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3865 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
3866 if (err
!= -NFS4ERR_DELAY
)
3868 nfs4_handle_exception(server
, err
, &exception
);
3869 } while (exception
.retry
);
3873 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
3875 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3876 struct nfs4_exception exception
= { };
3879 err
= nfs4_set_lock_state(state
, request
);
3883 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3885 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
3886 if (err
!= -NFS4ERR_DELAY
)
3888 nfs4_handle_exception(server
, err
, &exception
);
3889 } while (exception
.retry
);
3893 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3895 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3896 unsigned char fl_flags
= request
->fl_flags
;
3899 /* Is this a delegated open? */
3900 status
= nfs4_set_lock_state(state
, request
);
3903 request
->fl_flags
|= FL_ACCESS
;
3904 status
= do_vfs_lock(request
->fl_file
, request
);
3907 down_read(&nfsi
->rwsem
);
3908 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3909 /* Yes: cache locks! */
3910 /* ...but avoid races with delegation recall... */
3911 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
3912 status
= do_vfs_lock(request
->fl_file
, request
);
3915 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
3918 /* Note: we always want to sleep here! */
3919 request
->fl_flags
= fl_flags
| FL_SLEEP
;
3920 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3921 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __func__
);
3923 up_read(&nfsi
->rwsem
);
3925 request
->fl_flags
= fl_flags
;
3929 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3931 struct nfs4_exception exception
= { };
3935 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3936 _nfs4_proc_setlk(state
, cmd
, request
),
3938 } while (exception
.retry
);
3943 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3945 struct nfs_open_context
*ctx
;
3946 struct nfs4_state
*state
;
3947 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3950 /* verify open state */
3951 ctx
= nfs_file_open_context(filp
);
3954 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3958 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3960 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3963 if (request
->fl_type
== F_UNLCK
)
3964 return nfs4_proc_unlck(state
, cmd
, request
);
3967 status
= nfs4_proc_setlk(state
, cmd
, request
);
3968 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3970 timeout
= nfs4_set_lock_task_retry(timeout
);
3971 status
= -ERESTARTSYS
;
3974 } while(status
< 0);
3978 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
3980 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3981 struct nfs4_exception exception
= { };
3984 err
= nfs4_set_lock_state(state
, fl
);
3988 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, 0);
3989 if (err
!= -NFS4ERR_DELAY
)
3991 err
= nfs4_handle_exception(server
, err
, &exception
);
3992 } while (exception
.retry
);
3997 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3999 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
4000 size_t buflen
, int flags
)
4002 struct inode
*inode
= dentry
->d_inode
;
4004 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
4007 return nfs4_proc_set_acl(inode
, buf
, buflen
);
4010 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4011 * and that's what we'll do for e.g. user attributes that haven't been set.
4012 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4013 * attributes in kernel-managed attribute namespaces. */
4014 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
4017 struct inode
*inode
= dentry
->d_inode
;
4019 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
4022 return nfs4_proc_get_acl(inode
, buf
, buflen
);
4025 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
4027 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
4029 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
4031 if (buf
&& buflen
< len
)
4034 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
4038 static void nfs_fixup_referral_attributes(struct nfs_fattr
*fattr
)
4040 if (!((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) &&
4041 (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
4042 (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)))
4045 fattr
->valid
|= NFS_ATTR_FATTR_TYPE
| NFS_ATTR_FATTR_MODE
|
4046 NFS_ATTR_FATTR_NLINK
;
4047 fattr
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
4051 int nfs4_proc_fs_locations(struct inode
*dir
, const struct qstr
*name
,
4052 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
4054 struct nfs_server
*server
= NFS_SERVER(dir
);
4056 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
4057 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
4059 struct nfs4_fs_locations_arg args
= {
4060 .dir_fh
= NFS_FH(dir
),
4065 struct nfs4_fs_locations_res res
= {
4066 .fs_locations
= fs_locations
,
4068 struct rpc_message msg
= {
4069 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
4075 dprintk("%s: start\n", __func__
);
4076 nfs_fattr_init(&fs_locations
->fattr
);
4077 fs_locations
->server
= server
;
4078 fs_locations
->nlocations
= 0;
4079 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
4080 nfs_fixup_referral_attributes(&fs_locations
->fattr
);
4081 dprintk("%s: returned status = %d\n", __func__
, status
);
4085 #ifdef CONFIG_NFS_V4_1
4086 /* Destroy the slot table */
4087 static void nfs4_destroy_slot_table(struct nfs4_session
*session
)
4089 if (session
->fc_slot_table
.slots
== NULL
)
4091 kfree(session
->fc_slot_table
.slots
);
4092 session
->fc_slot_table
.slots
= NULL
;
4096 struct nfs4_session
*nfs4_alloc_session(struct nfs_client
*clp
)
4098 struct nfs4_session
*session
;
4099 struct nfs4_slot_table
*tbl
;
4101 session
= kzalloc(sizeof(struct nfs4_session
), GFP_KERNEL
);
4104 tbl
= &session
->fc_slot_table
;
4105 spin_lock_init(&tbl
->slot_tbl_lock
);
4106 rpc_init_wait_queue(&tbl
->slot_tbl_waitq
, "Slot table");
4111 void nfs4_destroy_session(struct nfs4_session
*session
)
4113 nfs4_destroy_slot_table(session
);
4117 #endif /* CONFIG_NFS_V4_1 */
4119 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
4120 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
4121 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
4122 .recover_open
= nfs4_open_reclaim
,
4123 .recover_lock
= nfs4_lock_reclaim
,
4126 struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops
= {
4127 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
4128 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
4129 .recover_open
= nfs4_open_expired
,
4130 .recover_lock
= nfs4_lock_expired
,
4133 static const struct inode_operations nfs4_file_inode_operations
= {
4134 .permission
= nfs_permission
,
4135 .getattr
= nfs_getattr
,
4136 .setattr
= nfs_setattr
,
4137 .getxattr
= nfs4_getxattr
,
4138 .setxattr
= nfs4_setxattr
,
4139 .listxattr
= nfs4_listxattr
,
4142 const struct nfs_rpc_ops nfs_v4_clientops
= {
4143 .version
= 4, /* protocol version */
4144 .dentry_ops
= &nfs4_dentry_operations
,
4145 .dir_inode_ops
= &nfs4_dir_inode_operations
,
4146 .file_inode_ops
= &nfs4_file_inode_operations
,
4147 .getroot
= nfs4_proc_get_root
,
4148 .getattr
= nfs4_proc_getattr
,
4149 .setattr
= nfs4_proc_setattr
,
4150 .lookupfh
= nfs4_proc_lookupfh
,
4151 .lookup
= nfs4_proc_lookup
,
4152 .access
= nfs4_proc_access
,
4153 .readlink
= nfs4_proc_readlink
,
4154 .create
= nfs4_proc_create
,
4155 .remove
= nfs4_proc_remove
,
4156 .unlink_setup
= nfs4_proc_unlink_setup
,
4157 .unlink_done
= nfs4_proc_unlink_done
,
4158 .rename
= nfs4_proc_rename
,
4159 .link
= nfs4_proc_link
,
4160 .symlink
= nfs4_proc_symlink
,
4161 .mkdir
= nfs4_proc_mkdir
,
4162 .rmdir
= nfs4_proc_remove
,
4163 .readdir
= nfs4_proc_readdir
,
4164 .mknod
= nfs4_proc_mknod
,
4165 .statfs
= nfs4_proc_statfs
,
4166 .fsinfo
= nfs4_proc_fsinfo
,
4167 .pathconf
= nfs4_proc_pathconf
,
4168 .set_capabilities
= nfs4_server_capabilities
,
4169 .decode_dirent
= nfs4_decode_dirent
,
4170 .read_setup
= nfs4_proc_read_setup
,
4171 .read_done
= nfs4_read_done
,
4172 .write_setup
= nfs4_proc_write_setup
,
4173 .write_done
= nfs4_write_done
,
4174 .commit_setup
= nfs4_proc_commit_setup
,
4175 .commit_done
= nfs4_commit_done
,
4176 .lock
= nfs4_proc_lock
,
4177 .clear_acl_cache
= nfs4_zap_acl_attr
,
4178 .close_context
= nfs4_close_context
,