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/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/slab.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/namei.h>
49 #include <linux/mount.h>
50 #include <linux/module.h>
51 #include <linux/sunrpc/bc_xprt.h>
54 #include "delegation.h"
59 #define NFSDBG_FACILITY NFSDBG_PROC
61 #define NFS4_POLL_RETRY_MIN (HZ/10)
62 #define NFS4_POLL_RETRY_MAX (15*HZ)
64 #define NFS4_MAX_LOOP_ON_RECOVER (10)
67 static int _nfs4_proc_open(struct nfs4_opendata
*data
);
68 static int _nfs4_recover_proc_open(struct nfs4_opendata
*data
);
69 static int nfs4_do_fsinfo(struct nfs_server
*, struct nfs_fh
*, struct nfs_fsinfo
*);
70 static int nfs4_async_handle_error(struct rpc_task
*, const struct nfs_server
*, struct nfs4_state
*);
71 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
72 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
74 /* Prevent leaks of NFSv4 errors into userland */
75 static int nfs4_map_errors(int err
)
80 case -NFS4ERR_RESOURCE
:
83 dprintk("%s could not handle NFSv4 error %d\n",
91 * This is our standard bitmap for GETATTR requests.
93 const u32 nfs4_fattr_bitmap
[2] = {
98 | FATTR4_WORD0_FILEID
,
100 | FATTR4_WORD1_NUMLINKS
102 | FATTR4_WORD1_OWNER_GROUP
103 | FATTR4_WORD1_RAWDEV
104 | FATTR4_WORD1_SPACE_USED
105 | FATTR4_WORD1_TIME_ACCESS
106 | FATTR4_WORD1_TIME_METADATA
107 | FATTR4_WORD1_TIME_MODIFY
110 const u32 nfs4_statfs_bitmap
[2] = {
111 FATTR4_WORD0_FILES_AVAIL
112 | FATTR4_WORD0_FILES_FREE
113 | FATTR4_WORD0_FILES_TOTAL
,
114 FATTR4_WORD1_SPACE_AVAIL
115 | FATTR4_WORD1_SPACE_FREE
116 | FATTR4_WORD1_SPACE_TOTAL
119 const u32 nfs4_pathconf_bitmap
[2] = {
121 | FATTR4_WORD0_MAXNAME
,
125 const u32 nfs4_fsinfo_bitmap
[2] = { FATTR4_WORD0_MAXFILESIZE
126 | FATTR4_WORD0_MAXREAD
127 | FATTR4_WORD0_MAXWRITE
128 | FATTR4_WORD0_LEASE_TIME
,
132 const u32 nfs4_fs_locations_bitmap
[2] = {
134 | FATTR4_WORD0_CHANGE
137 | FATTR4_WORD0_FILEID
138 | FATTR4_WORD0_FS_LOCATIONS
,
140 | FATTR4_WORD1_NUMLINKS
142 | FATTR4_WORD1_OWNER_GROUP
143 | FATTR4_WORD1_RAWDEV
144 | FATTR4_WORD1_SPACE_USED
145 | FATTR4_WORD1_TIME_ACCESS
146 | FATTR4_WORD1_TIME_METADATA
147 | FATTR4_WORD1_TIME_MODIFY
148 | FATTR4_WORD1_MOUNTED_ON_FILEID
151 static void nfs4_setup_readdir(u64 cookie
, __be32
*verifier
, struct dentry
*dentry
,
152 struct nfs4_readdir_arg
*readdir
)
156 BUG_ON(readdir
->count
< 80);
158 readdir
->cookie
= cookie
;
159 memcpy(&readdir
->verifier
, verifier
, sizeof(readdir
->verifier
));
164 memset(&readdir
->verifier
, 0, sizeof(readdir
->verifier
));
169 * NFSv4 servers do not return entries for '.' and '..'
170 * Therefore, we fake these entries here. We let '.'
171 * have cookie 0 and '..' have cookie 1. Note that
172 * when talking to the server, we always send cookie 0
175 start
= p
= kmap_atomic(*readdir
->pages
, KM_USER0
);
178 *p
++ = xdr_one
; /* next */
179 *p
++ = xdr_zero
; /* cookie, first word */
180 *p
++ = xdr_one
; /* cookie, second word */
181 *p
++ = xdr_one
; /* entry len */
182 memcpy(p
, ".\0\0\0", 4); /* entry */
184 *p
++ = xdr_one
; /* bitmap length */
185 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
186 *p
++ = htonl(8); /* attribute buffer length */
187 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_inode
));
190 *p
++ = xdr_one
; /* next */
191 *p
++ = xdr_zero
; /* cookie, first word */
192 *p
++ = xdr_two
; /* cookie, second word */
193 *p
++ = xdr_two
; /* entry len */
194 memcpy(p
, "..\0\0", 4); /* entry */
196 *p
++ = xdr_one
; /* bitmap length */
197 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
198 *p
++ = htonl(8); /* attribute buffer length */
199 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_parent
->d_inode
));
201 readdir
->pgbase
= (char *)p
- (char *)start
;
202 readdir
->count
-= readdir
->pgbase
;
203 kunmap_atomic(start
, KM_USER0
);
206 static int nfs4_wait_clnt_recover(struct nfs_client
*clp
)
212 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
,
213 nfs_wait_bit_killable
, TASK_KILLABLE
);
217 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
224 *timeout
= NFS4_POLL_RETRY_MIN
;
225 if (*timeout
> NFS4_POLL_RETRY_MAX
)
226 *timeout
= NFS4_POLL_RETRY_MAX
;
227 schedule_timeout_killable(*timeout
);
228 if (fatal_signal_pending(current
))
234 /* This is the error handling routine for processes that are allowed
237 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
239 struct nfs_client
*clp
= server
->nfs_client
;
240 struct nfs4_state
*state
= exception
->state
;
243 exception
->retry
= 0;
247 case -NFS4ERR_ADMIN_REVOKED
:
248 case -NFS4ERR_BAD_STATEID
:
249 case -NFS4ERR_OPENMODE
:
252 nfs4_state_mark_reclaim_nograce(clp
, state
);
253 goto do_state_recovery
;
254 case -NFS4ERR_STALE_STATEID
:
257 nfs4_state_mark_reclaim_reboot(clp
, state
);
258 case -NFS4ERR_STALE_CLIENTID
:
259 case -NFS4ERR_EXPIRED
:
260 goto do_state_recovery
;
261 #if defined(CONFIG_NFS_V4_1)
262 case -NFS4ERR_BADSESSION
:
263 case -NFS4ERR_BADSLOT
:
264 case -NFS4ERR_BAD_HIGH_SLOT
:
265 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
266 case -NFS4ERR_DEADSESSION
:
267 case -NFS4ERR_SEQ_FALSE_RETRY
:
268 case -NFS4ERR_SEQ_MISORDERED
:
269 dprintk("%s ERROR: %d Reset session\n", __func__
,
271 nfs4_schedule_state_recovery(clp
);
272 exception
->retry
= 1;
274 #endif /* defined(CONFIG_NFS_V4_1) */
275 case -NFS4ERR_FILE_OPEN
:
276 if (exception
->timeout
> HZ
) {
277 /* We have retried a decent amount, time to
286 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
289 case -NFS4ERR_OLD_STATEID
:
290 exception
->retry
= 1;
292 /* We failed to handle the error */
293 return nfs4_map_errors(ret
);
295 nfs4_schedule_state_recovery(clp
);
296 ret
= nfs4_wait_clnt_recover(clp
);
298 exception
->retry
= 1;
303 static void renew_lease(const struct nfs_server
*server
, unsigned long timestamp
)
305 struct nfs_client
*clp
= server
->nfs_client
;
306 spin_lock(&clp
->cl_lock
);
307 if (time_before(clp
->cl_last_renewal
,timestamp
))
308 clp
->cl_last_renewal
= timestamp
;
309 spin_unlock(&clp
->cl_lock
);
312 #if defined(CONFIG_NFS_V4_1)
315 * nfs4_free_slot - free a slot and efficiently update slot table.
317 * freeing a slot is trivially done by clearing its respective bit
319 * If the freed slotid equals highest_used_slotid we want to update it
320 * so that the server would be able to size down the slot table if needed,
321 * otherwise we know that the highest_used_slotid is still in use.
322 * When updating highest_used_slotid there may be "holes" in the bitmap
323 * so we need to scan down from highest_used_slotid to 0 looking for the now
324 * highest slotid in use.
325 * If none found, highest_used_slotid is set to -1.
327 * Must be called while holding tbl->slot_tbl_lock
330 nfs4_free_slot(struct nfs4_slot_table
*tbl
, u8 free_slotid
)
332 int slotid
= free_slotid
;
334 /* clear used bit in bitmap */
335 __clear_bit(slotid
, tbl
->used_slots
);
337 /* update highest_used_slotid when it is freed */
338 if (slotid
== tbl
->highest_used_slotid
) {
339 slotid
= find_last_bit(tbl
->used_slots
, tbl
->max_slots
);
340 if (slotid
< tbl
->max_slots
)
341 tbl
->highest_used_slotid
= slotid
;
343 tbl
->highest_used_slotid
= -1;
345 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__
,
346 free_slotid
, tbl
->highest_used_slotid
);
350 * Signal state manager thread if session is drained
352 static void nfs41_check_drain_session_complete(struct nfs4_session
*ses
)
354 struct rpc_task
*task
;
356 if (!test_bit(NFS4CLNT_SESSION_DRAINING
, &ses
->clp
->cl_state
)) {
357 task
= rpc_wake_up_next(&ses
->fc_slot_table
.slot_tbl_waitq
);
359 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
363 if (ses
->fc_slot_table
.highest_used_slotid
!= -1)
366 dprintk("%s COMPLETE: Session Drained\n", __func__
);
367 complete(&ses
->complete
);
370 static void nfs41_sequence_free_slot(const struct nfs_client
*clp
,
371 struct nfs4_sequence_res
*res
)
373 struct nfs4_slot_table
*tbl
;
375 tbl
= &clp
->cl_session
->fc_slot_table
;
376 if (res
->sr_slotid
== NFS4_MAX_SLOT_TABLE
) {
377 /* just wake up the next guy waiting since
378 * we may have not consumed a slot after all */
379 dprintk("%s: No slot\n", __func__
);
383 spin_lock(&tbl
->slot_tbl_lock
);
384 nfs4_free_slot(tbl
, res
->sr_slotid
);
385 nfs41_check_drain_session_complete(clp
->cl_session
);
386 spin_unlock(&tbl
->slot_tbl_lock
);
387 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
390 static void nfs41_sequence_done(struct nfs_client
*clp
,
391 struct nfs4_sequence_res
*res
,
394 unsigned long timestamp
;
395 struct nfs4_slot_table
*tbl
;
396 struct nfs4_slot
*slot
;
399 * sr_status remains 1 if an RPC level error occurred. The server
400 * may or may not have processed the sequence operation..
401 * Proceed as if the server received and processed the sequence
404 if (res
->sr_status
== 1)
405 res
->sr_status
= NFS_OK
;
407 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
408 if (res
->sr_slotid
== NFS4_MAX_SLOT_TABLE
)
411 /* Check the SEQUENCE operation status */
412 if (res
->sr_status
== 0) {
413 tbl
= &clp
->cl_session
->fc_slot_table
;
414 slot
= tbl
->slots
+ res
->sr_slotid
;
415 /* Update the slot's sequence and clientid lease timer */
417 timestamp
= res
->sr_renewal_time
;
418 spin_lock(&clp
->cl_lock
);
419 if (time_before(clp
->cl_last_renewal
, timestamp
))
420 clp
->cl_last_renewal
= timestamp
;
421 spin_unlock(&clp
->cl_lock
);
422 /* Check sequence flags */
423 if (atomic_read(&clp
->cl_count
) > 1)
424 nfs41_handle_sequence_flag_errors(clp
, res
->sr_status_flags
);
427 /* The session may be reset by one of the error handlers. */
428 dprintk("%s: Error %d free the slot \n", __func__
, res
->sr_status
);
429 nfs41_sequence_free_slot(clp
, res
);
433 * nfs4_find_slot - efficiently look for a free slot
435 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
436 * If found, we mark the slot as used, update the highest_used_slotid,
437 * and respectively set up the sequence operation args.
438 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
440 * Note: must be called with under the slot_tbl_lock.
443 nfs4_find_slot(struct nfs4_slot_table
*tbl
)
446 u8 ret_id
= NFS4_MAX_SLOT_TABLE
;
447 BUILD_BUG_ON((u8
)NFS4_MAX_SLOT_TABLE
!= (int)NFS4_MAX_SLOT_TABLE
);
449 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
450 __func__
, tbl
->used_slots
[0], tbl
->highest_used_slotid
,
452 slotid
= find_first_zero_bit(tbl
->used_slots
, tbl
->max_slots
);
453 if (slotid
>= tbl
->max_slots
)
455 __set_bit(slotid
, tbl
->used_slots
);
456 if (slotid
> tbl
->highest_used_slotid
)
457 tbl
->highest_used_slotid
= slotid
;
460 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
461 __func__
, tbl
->used_slots
[0], tbl
->highest_used_slotid
, ret_id
);
465 static int nfs41_setup_sequence(struct nfs4_session
*session
,
466 struct nfs4_sequence_args
*args
,
467 struct nfs4_sequence_res
*res
,
469 struct rpc_task
*task
)
471 struct nfs4_slot
*slot
;
472 struct nfs4_slot_table
*tbl
;
475 dprintk("--> %s\n", __func__
);
476 /* slot already allocated? */
477 if (res
->sr_slotid
!= NFS4_MAX_SLOT_TABLE
)
480 memset(res
, 0, sizeof(*res
));
481 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
482 tbl
= &session
->fc_slot_table
;
484 spin_lock(&tbl
->slot_tbl_lock
);
485 if (test_bit(NFS4CLNT_SESSION_DRAINING
, &session
->clp
->cl_state
) &&
486 !rpc_task_has_priority(task
, RPC_PRIORITY_PRIVILEGED
)) {
488 * The state manager will wait until the slot table is empty.
489 * Schedule the reset thread
491 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
492 spin_unlock(&tbl
->slot_tbl_lock
);
493 dprintk("%s Schedule Session Reset\n", __func__
);
497 if (!rpc_queue_empty(&tbl
->slot_tbl_waitq
) &&
498 !rpc_task_has_priority(task
, RPC_PRIORITY_PRIVILEGED
)) {
499 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
500 spin_unlock(&tbl
->slot_tbl_lock
);
501 dprintk("%s enforce FIFO order\n", __func__
);
505 slotid
= nfs4_find_slot(tbl
);
506 if (slotid
== NFS4_MAX_SLOT_TABLE
) {
507 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
508 spin_unlock(&tbl
->slot_tbl_lock
);
509 dprintk("<-- %s: no free slots\n", __func__
);
512 spin_unlock(&tbl
->slot_tbl_lock
);
514 rpc_task_set_priority(task
, RPC_PRIORITY_NORMAL
);
515 slot
= tbl
->slots
+ slotid
;
516 args
->sa_session
= session
;
517 args
->sa_slotid
= slotid
;
518 args
->sa_cache_this
= cache_reply
;
520 dprintk("<-- %s slotid=%d seqid=%d\n", __func__
, slotid
, slot
->seq_nr
);
522 res
->sr_session
= session
;
523 res
->sr_slotid
= slotid
;
524 res
->sr_renewal_time
= jiffies
;
526 * sr_status is only set in decode_sequence, and so will remain
527 * set to 1 if an rpc level failure occurs.
533 int nfs4_setup_sequence(struct nfs_client
*clp
,
534 struct nfs4_sequence_args
*args
,
535 struct nfs4_sequence_res
*res
,
537 struct rpc_task
*task
)
541 dprintk("--> %s clp %p session %p sr_slotid %d\n",
542 __func__
, clp
, clp
->cl_session
, res
->sr_slotid
);
544 if (!nfs4_has_session(clp
))
546 ret
= nfs41_setup_sequence(clp
->cl_session
, args
, res
, cache_reply
,
548 if (ret
&& ret
!= -EAGAIN
) {
549 /* terminate rpc task */
550 task
->tk_status
= ret
;
551 task
->tk_action
= NULL
;
554 dprintk("<-- %s status=%d\n", __func__
, ret
);
558 struct nfs41_call_sync_data
{
559 struct nfs_client
*clp
;
560 struct nfs4_sequence_args
*seq_args
;
561 struct nfs4_sequence_res
*seq_res
;
565 static void nfs41_call_sync_prepare(struct rpc_task
*task
, void *calldata
)
567 struct nfs41_call_sync_data
*data
= calldata
;
569 dprintk("--> %s data->clp->cl_session %p\n", __func__
,
570 data
->clp
->cl_session
);
571 if (nfs4_setup_sequence(data
->clp
, data
->seq_args
,
572 data
->seq_res
, data
->cache_reply
, task
))
574 rpc_call_start(task
);
577 static void nfs41_call_priv_sync_prepare(struct rpc_task
*task
, void *calldata
)
579 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
580 nfs41_call_sync_prepare(task
, calldata
);
583 static void nfs41_call_sync_done(struct rpc_task
*task
, void *calldata
)
585 struct nfs41_call_sync_data
*data
= calldata
;
587 nfs41_sequence_done(data
->clp
, data
->seq_res
, task
->tk_status
);
590 struct rpc_call_ops nfs41_call_sync_ops
= {
591 .rpc_call_prepare
= nfs41_call_sync_prepare
,
592 .rpc_call_done
= nfs41_call_sync_done
,
595 struct rpc_call_ops nfs41_call_priv_sync_ops
= {
596 .rpc_call_prepare
= nfs41_call_priv_sync_prepare
,
597 .rpc_call_done
= nfs41_call_sync_done
,
600 static int nfs4_call_sync_sequence(struct nfs_client
*clp
,
601 struct rpc_clnt
*clnt
,
602 struct rpc_message
*msg
,
603 struct nfs4_sequence_args
*args
,
604 struct nfs4_sequence_res
*res
,
609 struct rpc_task
*task
;
610 struct nfs41_call_sync_data data
= {
614 .cache_reply
= cache_reply
,
616 struct rpc_task_setup task_setup
= {
619 .callback_ops
= &nfs41_call_sync_ops
,
620 .callback_data
= &data
623 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
625 task_setup
.callback_ops
= &nfs41_call_priv_sync_ops
;
626 task
= rpc_run_task(&task_setup
);
630 ret
= task
->tk_status
;
636 int _nfs4_call_sync_session(struct nfs_server
*server
,
637 struct rpc_message
*msg
,
638 struct nfs4_sequence_args
*args
,
639 struct nfs4_sequence_res
*res
,
642 return nfs4_call_sync_sequence(server
->nfs_client
, server
->client
,
643 msg
, args
, res
, cache_reply
, 0);
646 #endif /* CONFIG_NFS_V4_1 */
648 int _nfs4_call_sync(struct nfs_server
*server
,
649 struct rpc_message
*msg
,
650 struct nfs4_sequence_args
*args
,
651 struct nfs4_sequence_res
*res
,
654 args
->sa_session
= res
->sr_session
= NULL
;
655 return rpc_call_sync(server
->client
, msg
, 0);
658 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
659 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
660 &(res)->seq_res, (cache_reply))
662 static void nfs4_sequence_done(const struct nfs_server
*server
,
663 struct nfs4_sequence_res
*res
, int rpc_status
)
665 #ifdef CONFIG_NFS_V4_1
666 if (nfs4_has_session(server
->nfs_client
))
667 nfs41_sequence_done(server
->nfs_client
, res
, rpc_status
);
668 #endif /* CONFIG_NFS_V4_1 */
671 static void update_changeattr(struct inode
*dir
, struct nfs4_change_info
*cinfo
)
673 struct nfs_inode
*nfsi
= NFS_I(dir
);
675 spin_lock(&dir
->i_lock
);
676 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
|NFS_INO_INVALID_DATA
;
677 if (!cinfo
->atomic
|| cinfo
->before
!= nfsi
->change_attr
)
678 nfs_force_lookup_revalidate(dir
);
679 nfsi
->change_attr
= cinfo
->after
;
680 spin_unlock(&dir
->i_lock
);
683 struct nfs4_opendata
{
685 struct nfs_openargs o_arg
;
686 struct nfs_openres o_res
;
687 struct nfs_open_confirmargs c_arg
;
688 struct nfs_open_confirmres c_res
;
689 struct nfs_fattr f_attr
;
690 struct nfs_fattr dir_attr
;
693 struct nfs4_state_owner
*owner
;
694 struct nfs4_state
*state
;
696 unsigned long timestamp
;
697 unsigned int rpc_done
: 1;
703 static void nfs4_init_opendata_res(struct nfs4_opendata
*p
)
705 p
->o_res
.f_attr
= &p
->f_attr
;
706 p
->o_res
.dir_attr
= &p
->dir_attr
;
707 p
->o_res
.seqid
= p
->o_arg
.seqid
;
708 p
->c_res
.seqid
= p
->c_arg
.seqid
;
709 p
->o_res
.server
= p
->o_arg
.server
;
710 nfs_fattr_init(&p
->f_attr
);
711 nfs_fattr_init(&p
->dir_attr
);
712 p
->o_res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
715 static struct nfs4_opendata
*nfs4_opendata_alloc(struct path
*path
,
716 struct nfs4_state_owner
*sp
, fmode_t fmode
, int flags
,
717 const struct iattr
*attrs
)
719 struct dentry
*parent
= dget_parent(path
->dentry
);
720 struct inode
*dir
= parent
->d_inode
;
721 struct nfs_server
*server
= NFS_SERVER(dir
);
722 struct nfs4_opendata
*p
;
724 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
727 p
->o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
728 if (p
->o_arg
.seqid
== NULL
)
734 atomic_inc(&sp
->so_count
);
735 p
->o_arg
.fh
= NFS_FH(dir
);
736 p
->o_arg
.open_flags
= flags
;
737 p
->o_arg
.fmode
= fmode
& (FMODE_READ
|FMODE_WRITE
);
738 p
->o_arg
.clientid
= server
->nfs_client
->cl_clientid
;
739 p
->o_arg
.id
= sp
->so_owner_id
.id
;
740 p
->o_arg
.name
= &p
->path
.dentry
->d_name
;
741 p
->o_arg
.server
= server
;
742 p
->o_arg
.bitmask
= server
->attr_bitmask
;
743 p
->o_arg
.claim
= NFS4_OPEN_CLAIM_NULL
;
744 if (flags
& O_EXCL
) {
745 if (nfs4_has_persistent_session(server
->nfs_client
)) {
747 p
->o_arg
.u
.attrs
= &p
->attrs
;
748 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
749 } else { /* EXCLUSIVE4_1 */
750 u32
*s
= (u32
*) p
->o_arg
.u
.verifier
.data
;
754 } else if (flags
& O_CREAT
) {
755 p
->o_arg
.u
.attrs
= &p
->attrs
;
756 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
758 p
->c_arg
.fh
= &p
->o_res
.fh
;
759 p
->c_arg
.stateid
= &p
->o_res
.stateid
;
760 p
->c_arg
.seqid
= p
->o_arg
.seqid
;
761 nfs4_init_opendata_res(p
);
771 static void nfs4_opendata_free(struct kref
*kref
)
773 struct nfs4_opendata
*p
= container_of(kref
,
774 struct nfs4_opendata
, kref
);
776 nfs_free_seqid(p
->o_arg
.seqid
);
777 if (p
->state
!= NULL
)
778 nfs4_put_open_state(p
->state
);
779 nfs4_put_state_owner(p
->owner
);
785 static void nfs4_opendata_put(struct nfs4_opendata
*p
)
788 kref_put(&p
->kref
, nfs4_opendata_free
);
791 static int nfs4_wait_for_completion_rpc_task(struct rpc_task
*task
)
795 ret
= rpc_wait_for_completion_task(task
);
799 static int can_open_cached(struct nfs4_state
*state
, fmode_t mode
, int open_mode
)
803 if (open_mode
& O_EXCL
)
805 switch (mode
& (FMODE_READ
|FMODE_WRITE
)) {
807 ret
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0
808 && state
->n_rdonly
!= 0;
811 ret
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0
812 && state
->n_wronly
!= 0;
814 case FMODE_READ
|FMODE_WRITE
:
815 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0
816 && state
->n_rdwr
!= 0;
822 static int can_open_delegated(struct nfs_delegation
*delegation
, fmode_t fmode
)
824 if ((delegation
->type
& fmode
) != fmode
)
826 if (test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
))
828 nfs_mark_delegation_referenced(delegation
);
832 static void update_open_stateflags(struct nfs4_state
*state
, fmode_t fmode
)
841 case FMODE_READ
|FMODE_WRITE
:
844 nfs4_state_set_mode_locked(state
, state
->state
| fmode
);
847 static void nfs_set_open_stateid_locked(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
849 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
850 memcpy(state
->stateid
.data
, stateid
->data
, sizeof(state
->stateid
.data
));
851 memcpy(state
->open_stateid
.data
, stateid
->data
, sizeof(state
->open_stateid
.data
));
854 set_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
857 set_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
859 case FMODE_READ
|FMODE_WRITE
:
860 set_bit(NFS_O_RDWR_STATE
, &state
->flags
);
864 static void nfs_set_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
866 write_seqlock(&state
->seqlock
);
867 nfs_set_open_stateid_locked(state
, stateid
, fmode
);
868 write_sequnlock(&state
->seqlock
);
871 static void __update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, const nfs4_stateid
*deleg_stateid
, fmode_t fmode
)
874 * Protect the call to nfs4_state_set_mode_locked and
875 * serialise the stateid update
877 write_seqlock(&state
->seqlock
);
878 if (deleg_stateid
!= NULL
) {
879 memcpy(state
->stateid
.data
, deleg_stateid
->data
, sizeof(state
->stateid
.data
));
880 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
882 if (open_stateid
!= NULL
)
883 nfs_set_open_stateid_locked(state
, open_stateid
, fmode
);
884 write_sequnlock(&state
->seqlock
);
885 spin_lock(&state
->owner
->so_lock
);
886 update_open_stateflags(state
, fmode
);
887 spin_unlock(&state
->owner
->so_lock
);
890 static int update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, nfs4_stateid
*delegation
, fmode_t fmode
)
892 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
893 struct nfs_delegation
*deleg_cur
;
896 fmode
&= (FMODE_READ
|FMODE_WRITE
);
899 deleg_cur
= rcu_dereference(nfsi
->delegation
);
900 if (deleg_cur
== NULL
)
903 spin_lock(&deleg_cur
->lock
);
904 if (nfsi
->delegation
!= deleg_cur
||
905 (deleg_cur
->type
& fmode
) != fmode
)
906 goto no_delegation_unlock
;
908 if (delegation
== NULL
)
909 delegation
= &deleg_cur
->stateid
;
910 else if (memcmp(deleg_cur
->stateid
.data
, delegation
->data
, NFS4_STATEID_SIZE
) != 0)
911 goto no_delegation_unlock
;
913 nfs_mark_delegation_referenced(deleg_cur
);
914 __update_open_stateid(state
, open_stateid
, &deleg_cur
->stateid
, fmode
);
916 no_delegation_unlock
:
917 spin_unlock(&deleg_cur
->lock
);
921 if (!ret
&& open_stateid
!= NULL
) {
922 __update_open_stateid(state
, open_stateid
, NULL
, fmode
);
930 static void nfs4_return_incompatible_delegation(struct inode
*inode
, fmode_t fmode
)
932 struct nfs_delegation
*delegation
;
935 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
936 if (delegation
== NULL
|| (delegation
->type
& fmode
) == fmode
) {
941 nfs_inode_return_delegation(inode
);
944 static struct nfs4_state
*nfs4_try_open_cached(struct nfs4_opendata
*opendata
)
946 struct nfs4_state
*state
= opendata
->state
;
947 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
948 struct nfs_delegation
*delegation
;
949 int open_mode
= opendata
->o_arg
.open_flags
& O_EXCL
;
950 fmode_t fmode
= opendata
->o_arg
.fmode
;
951 nfs4_stateid stateid
;
955 if (can_open_cached(state
, fmode
, open_mode
)) {
956 spin_lock(&state
->owner
->so_lock
);
957 if (can_open_cached(state
, fmode
, open_mode
)) {
958 update_open_stateflags(state
, fmode
);
959 spin_unlock(&state
->owner
->so_lock
);
960 goto out_return_state
;
962 spin_unlock(&state
->owner
->so_lock
);
965 delegation
= rcu_dereference(nfsi
->delegation
);
966 if (delegation
== NULL
||
967 !can_open_delegated(delegation
, fmode
)) {
971 /* Save the delegation */
972 memcpy(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
));
974 ret
= nfs_may_open(state
->inode
, state
->owner
->so_cred
, open_mode
);
979 /* Try to update the stateid using the delegation */
980 if (update_open_stateid(state
, NULL
, &stateid
, fmode
))
981 goto out_return_state
;
986 atomic_inc(&state
->count
);
990 static struct nfs4_state
*nfs4_opendata_to_nfs4_state(struct nfs4_opendata
*data
)
993 struct nfs4_state
*state
= NULL
;
994 struct nfs_delegation
*delegation
;
997 if (!data
->rpc_done
) {
998 state
= nfs4_try_open_cached(data
);
1003 if (!(data
->f_attr
.valid
& NFS_ATTR_FATTR
))
1005 inode
= nfs_fhget(data
->dir
->d_sb
, &data
->o_res
.fh
, &data
->f_attr
);
1006 ret
= PTR_ERR(inode
);
1010 state
= nfs4_get_open_state(inode
, data
->owner
);
1013 if (data
->o_res
.delegation_type
!= 0) {
1014 int delegation_flags
= 0;
1017 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
1019 delegation_flags
= delegation
->flags
;
1021 if ((delegation_flags
& 1UL<<NFS_DELEGATION_NEED_RECLAIM
) == 0)
1022 nfs_inode_set_delegation(state
->inode
,
1023 data
->owner
->so_cred
,
1026 nfs_inode_reclaim_delegation(state
->inode
,
1027 data
->owner
->so_cred
,
1031 update_open_stateid(state
, &data
->o_res
.stateid
, NULL
,
1039 return ERR_PTR(ret
);
1042 static struct nfs_open_context
*nfs4_state_find_open_context(struct nfs4_state
*state
)
1044 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
1045 struct nfs_open_context
*ctx
;
1047 spin_lock(&state
->inode
->i_lock
);
1048 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
1049 if (ctx
->state
!= state
)
1051 get_nfs_open_context(ctx
);
1052 spin_unlock(&state
->inode
->i_lock
);
1055 spin_unlock(&state
->inode
->i_lock
);
1056 return ERR_PTR(-ENOENT
);
1059 static struct nfs4_opendata
*nfs4_open_recoverdata_alloc(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1061 struct nfs4_opendata
*opendata
;
1063 opendata
= nfs4_opendata_alloc(&ctx
->path
, state
->owner
, 0, 0, NULL
);
1064 if (opendata
== NULL
)
1065 return ERR_PTR(-ENOMEM
);
1066 opendata
->state
= state
;
1067 atomic_inc(&state
->count
);
1071 static int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, fmode_t fmode
, struct nfs4_state
**res
)
1073 struct nfs4_state
*newstate
;
1076 opendata
->o_arg
.open_flags
= 0;
1077 opendata
->o_arg
.fmode
= fmode
;
1078 memset(&opendata
->o_res
, 0, sizeof(opendata
->o_res
));
1079 memset(&opendata
->c_res
, 0, sizeof(opendata
->c_res
));
1080 nfs4_init_opendata_res(opendata
);
1081 ret
= _nfs4_recover_proc_open(opendata
);
1084 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
1085 if (IS_ERR(newstate
))
1086 return PTR_ERR(newstate
);
1087 nfs4_close_state(&opendata
->path
, newstate
, fmode
);
1092 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
1094 struct nfs4_state
*newstate
;
1097 /* memory barrier prior to reading state->n_* */
1098 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
1100 if (state
->n_rdwr
!= 0) {
1101 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &newstate
);
1104 if (newstate
!= state
)
1107 if (state
->n_wronly
!= 0) {
1108 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &newstate
);
1111 if (newstate
!= state
)
1114 if (state
->n_rdonly
!= 0) {
1115 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &newstate
);
1118 if (newstate
!= state
)
1122 * We may have performed cached opens for all three recoveries.
1123 * Check if we need to update the current stateid.
1125 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0 &&
1126 memcmp(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
)) != 0) {
1127 write_seqlock(&state
->seqlock
);
1128 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
1129 memcpy(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
));
1130 write_sequnlock(&state
->seqlock
);
1137 * reclaim state on the server after a reboot.
1139 static int _nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1141 struct nfs_delegation
*delegation
;
1142 struct nfs4_opendata
*opendata
;
1143 fmode_t delegation_type
= 0;
1146 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1147 if (IS_ERR(opendata
))
1148 return PTR_ERR(opendata
);
1149 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
1150 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
1152 delegation
= rcu_dereference(NFS_I(state
->inode
)->delegation
);
1153 if (delegation
!= NULL
&& test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) != 0)
1154 delegation_type
= delegation
->type
;
1156 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
1157 status
= nfs4_open_recover(opendata
, state
);
1158 nfs4_opendata_put(opendata
);
1162 static int nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1164 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1165 struct nfs4_exception exception
= { };
1168 err
= _nfs4_do_open_reclaim(ctx
, state
);
1169 if (err
!= -NFS4ERR_DELAY
&& err
!= -EKEYEXPIRED
)
1171 nfs4_handle_exception(server
, err
, &exception
);
1172 } while (exception
.retry
);
1176 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1178 struct nfs_open_context
*ctx
;
1181 ctx
= nfs4_state_find_open_context(state
);
1183 return PTR_ERR(ctx
);
1184 ret
= nfs4_do_open_reclaim(ctx
, state
);
1185 put_nfs_open_context(ctx
);
1189 static int _nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
1191 struct nfs4_opendata
*opendata
;
1194 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1195 if (IS_ERR(opendata
))
1196 return PTR_ERR(opendata
);
1197 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
1198 memcpy(opendata
->o_arg
.u
.delegation
.data
, stateid
->data
,
1199 sizeof(opendata
->o_arg
.u
.delegation
.data
));
1200 ret
= nfs4_open_recover(opendata
, state
);
1201 nfs4_opendata_put(opendata
);
1205 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
1207 struct nfs4_exception exception
= { };
1208 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1211 err
= _nfs4_open_delegation_recall(ctx
, state
, stateid
);
1217 case -NFS4ERR_BADSESSION
:
1218 case -NFS4ERR_BADSLOT
:
1219 case -NFS4ERR_BAD_HIGH_SLOT
:
1220 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1221 case -NFS4ERR_DEADSESSION
:
1222 nfs4_schedule_state_recovery(
1223 server
->nfs_client
);
1225 case -NFS4ERR_STALE_CLIENTID
:
1226 case -NFS4ERR_STALE_STATEID
:
1227 case -NFS4ERR_EXPIRED
:
1228 /* Don't recall a delegation if it was lost */
1229 nfs4_schedule_state_recovery(server
->nfs_client
);
1233 * The show must go on: exit, but mark the
1234 * stateid as needing recovery.
1236 case -NFS4ERR_ADMIN_REVOKED
:
1237 case -NFS4ERR_BAD_STATEID
:
1238 nfs4_state_mark_reclaim_nograce(server
->nfs_client
, state
);
1243 err
= nfs4_handle_exception(server
, err
, &exception
);
1244 } while (exception
.retry
);
1249 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
1251 struct nfs4_opendata
*data
= calldata
;
1253 data
->rpc_status
= task
->tk_status
;
1254 if (RPC_ASSASSINATED(task
))
1256 if (data
->rpc_status
== 0) {
1257 memcpy(data
->o_res
.stateid
.data
, data
->c_res
.stateid
.data
,
1258 sizeof(data
->o_res
.stateid
.data
));
1259 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
1260 renew_lease(data
->o_res
.server
, data
->timestamp
);
1265 static void nfs4_open_confirm_release(void *calldata
)
1267 struct nfs4_opendata
*data
= calldata
;
1268 struct nfs4_state
*state
= NULL
;
1270 /* If this request hasn't been cancelled, do nothing */
1271 if (data
->cancelled
== 0)
1273 /* In case of error, no cleanup! */
1274 if (!data
->rpc_done
)
1276 state
= nfs4_opendata_to_nfs4_state(data
);
1278 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
1280 nfs4_opendata_put(data
);
1283 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
1284 .rpc_call_done
= nfs4_open_confirm_done
,
1285 .rpc_release
= nfs4_open_confirm_release
,
1289 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1291 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
1293 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
1294 struct rpc_task
*task
;
1295 struct rpc_message msg
= {
1296 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
1297 .rpc_argp
= &data
->c_arg
,
1298 .rpc_resp
= &data
->c_res
,
1299 .rpc_cred
= data
->owner
->so_cred
,
1301 struct rpc_task_setup task_setup_data
= {
1302 .rpc_client
= server
->client
,
1303 .rpc_message
= &msg
,
1304 .callback_ops
= &nfs4_open_confirm_ops
,
1305 .callback_data
= data
,
1306 .workqueue
= nfsiod_workqueue
,
1307 .flags
= RPC_TASK_ASYNC
,
1311 kref_get(&data
->kref
);
1313 data
->rpc_status
= 0;
1314 data
->timestamp
= jiffies
;
1315 task
= rpc_run_task(&task_setup_data
);
1317 return PTR_ERR(task
);
1318 status
= nfs4_wait_for_completion_rpc_task(task
);
1320 data
->cancelled
= 1;
1323 status
= data
->rpc_status
;
1328 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
1330 struct nfs4_opendata
*data
= calldata
;
1331 struct nfs4_state_owner
*sp
= data
->owner
;
1333 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
1336 * Check if we still need to send an OPEN call, or if we can use
1337 * a delegation instead.
1339 if (data
->state
!= NULL
) {
1340 struct nfs_delegation
*delegation
;
1342 if (can_open_cached(data
->state
, data
->o_arg
.fmode
, data
->o_arg
.open_flags
))
1345 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
1346 if (delegation
!= NULL
&&
1347 test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) == 0) {
1353 /* Update sequence id. */
1354 data
->o_arg
.id
= sp
->so_owner_id
.id
;
1355 data
->o_arg
.clientid
= sp
->so_client
->cl_clientid
;
1356 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
) {
1357 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
1358 nfs_copy_fh(&data
->o_res
.fh
, data
->o_arg
.fh
);
1360 data
->timestamp
= jiffies
;
1361 if (nfs4_setup_sequence(data
->o_arg
.server
->nfs_client
,
1362 &data
->o_arg
.seq_args
,
1363 &data
->o_res
.seq_res
, 1, task
))
1365 rpc_call_start(task
);
1368 task
->tk_action
= NULL
;
1372 static void nfs4_recover_open_prepare(struct rpc_task
*task
, void *calldata
)
1374 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
1375 nfs4_open_prepare(task
, calldata
);
1378 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
1380 struct nfs4_opendata
*data
= calldata
;
1382 data
->rpc_status
= task
->tk_status
;
1384 nfs4_sequence_done(data
->o_arg
.server
, &data
->o_res
.seq_res
,
1387 if (RPC_ASSASSINATED(task
))
1389 if (task
->tk_status
== 0) {
1390 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
1394 data
->rpc_status
= -ELOOP
;
1397 data
->rpc_status
= -EISDIR
;
1400 data
->rpc_status
= -ENOTDIR
;
1402 renew_lease(data
->o_res
.server
, data
->timestamp
);
1403 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
1404 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
1409 static void nfs4_open_release(void *calldata
)
1411 struct nfs4_opendata
*data
= calldata
;
1412 struct nfs4_state
*state
= NULL
;
1414 /* If this request hasn't been cancelled, do nothing */
1415 if (data
->cancelled
== 0)
1417 /* In case of error, no cleanup! */
1418 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
1420 /* In case we need an open_confirm, no cleanup! */
1421 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
1423 state
= nfs4_opendata_to_nfs4_state(data
);
1425 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
1427 nfs4_opendata_put(data
);
1430 static const struct rpc_call_ops nfs4_open_ops
= {
1431 .rpc_call_prepare
= nfs4_open_prepare
,
1432 .rpc_call_done
= nfs4_open_done
,
1433 .rpc_release
= nfs4_open_release
,
1436 static const struct rpc_call_ops nfs4_recover_open_ops
= {
1437 .rpc_call_prepare
= nfs4_recover_open_prepare
,
1438 .rpc_call_done
= nfs4_open_done
,
1439 .rpc_release
= nfs4_open_release
,
1442 static int nfs4_run_open_task(struct nfs4_opendata
*data
, int isrecover
)
1444 struct inode
*dir
= data
->dir
->d_inode
;
1445 struct nfs_server
*server
= NFS_SERVER(dir
);
1446 struct nfs_openargs
*o_arg
= &data
->o_arg
;
1447 struct nfs_openres
*o_res
= &data
->o_res
;
1448 struct rpc_task
*task
;
1449 struct rpc_message msg
= {
1450 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
1453 .rpc_cred
= data
->owner
->so_cred
,
1455 struct rpc_task_setup task_setup_data
= {
1456 .rpc_client
= server
->client
,
1457 .rpc_message
= &msg
,
1458 .callback_ops
= &nfs4_open_ops
,
1459 .callback_data
= data
,
1460 .workqueue
= nfsiod_workqueue
,
1461 .flags
= RPC_TASK_ASYNC
,
1465 kref_get(&data
->kref
);
1467 data
->rpc_status
= 0;
1468 data
->cancelled
= 0;
1470 task_setup_data
.callback_ops
= &nfs4_recover_open_ops
;
1471 task
= rpc_run_task(&task_setup_data
);
1473 return PTR_ERR(task
);
1474 status
= nfs4_wait_for_completion_rpc_task(task
);
1476 data
->cancelled
= 1;
1479 status
= data
->rpc_status
;
1485 static int _nfs4_recover_proc_open(struct nfs4_opendata
*data
)
1487 struct inode
*dir
= data
->dir
->d_inode
;
1488 struct nfs_openres
*o_res
= &data
->o_res
;
1491 status
= nfs4_run_open_task(data
, 1);
1492 if (status
!= 0 || !data
->rpc_done
)
1495 nfs_refresh_inode(dir
, o_res
->dir_attr
);
1497 if (o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1498 status
= _nfs4_proc_open_confirm(data
);
1507 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1509 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
1511 struct inode
*dir
= data
->dir
->d_inode
;
1512 struct nfs_server
*server
= NFS_SERVER(dir
);
1513 struct nfs_openargs
*o_arg
= &data
->o_arg
;
1514 struct nfs_openres
*o_res
= &data
->o_res
;
1517 status
= nfs4_run_open_task(data
, 0);
1518 if (status
!= 0 || !data
->rpc_done
)
1521 if (o_arg
->open_flags
& O_CREAT
) {
1522 update_changeattr(dir
, &o_res
->cinfo
);
1523 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
1525 nfs_refresh_inode(dir
, o_res
->dir_attr
);
1526 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1527 status
= _nfs4_proc_open_confirm(data
);
1531 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
1532 _nfs4_proc_getattr(server
, &o_res
->fh
, o_res
->f_attr
);
1536 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
1538 struct nfs_client
*clp
= server
->nfs_client
;
1542 for (loop
= NFS4_MAX_LOOP_ON_RECOVER
; loop
!= 0; loop
--) {
1543 ret
= nfs4_wait_clnt_recover(clp
);
1546 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
1547 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
1549 nfs4_schedule_state_recovery(clp
);
1557 * reclaim state on the server after a network partition.
1558 * Assumes caller holds the appropriate lock
1560 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1562 struct nfs4_opendata
*opendata
;
1565 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1566 if (IS_ERR(opendata
))
1567 return PTR_ERR(opendata
);
1568 ret
= nfs4_open_recover(opendata
, state
);
1570 d_drop(ctx
->path
.dentry
);
1571 nfs4_opendata_put(opendata
);
1575 static int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1577 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1578 struct nfs4_exception exception
= { };
1582 err
= _nfs4_open_expired(ctx
, state
);
1586 case -NFS4ERR_GRACE
:
1587 case -NFS4ERR_DELAY
:
1589 nfs4_handle_exception(server
, err
, &exception
);
1592 } while (exception
.retry
);
1597 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1599 struct nfs_open_context
*ctx
;
1602 ctx
= nfs4_state_find_open_context(state
);
1604 return PTR_ERR(ctx
);
1605 ret
= nfs4_do_open_expired(ctx
, state
);
1606 put_nfs_open_context(ctx
);
1611 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1612 * fields corresponding to attributes that were used to store the verifier.
1613 * Make sure we clobber those fields in the later setattr call
1615 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1617 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1618 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1619 sattr
->ia_valid
|= ATTR_ATIME
;
1621 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1622 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1623 sattr
->ia_valid
|= ATTR_MTIME
;
1627 * Returns a referenced nfs4_state
1629 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
)
1631 struct nfs4_state_owner
*sp
;
1632 struct nfs4_state
*state
= NULL
;
1633 struct nfs_server
*server
= NFS_SERVER(dir
);
1634 struct nfs4_opendata
*opendata
;
1637 /* Protect against reboot recovery conflicts */
1639 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1640 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1643 status
= nfs4_recover_expired_lease(server
);
1645 goto err_put_state_owner
;
1646 if (path
->dentry
->d_inode
!= NULL
)
1647 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, fmode
);
1649 opendata
= nfs4_opendata_alloc(path
, sp
, fmode
, flags
, sattr
);
1650 if (opendata
== NULL
)
1651 goto err_put_state_owner
;
1653 if (path
->dentry
->d_inode
!= NULL
)
1654 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1656 status
= _nfs4_proc_open(opendata
);
1658 goto err_opendata_put
;
1660 if (opendata
->o_arg
.open_flags
& O_EXCL
)
1661 nfs4_exclusive_attrset(opendata
, sattr
);
1663 state
= nfs4_opendata_to_nfs4_state(opendata
);
1664 status
= PTR_ERR(state
);
1666 goto err_opendata_put
;
1667 if ((opendata
->o_res
.rflags
& NFS4_OPEN_RESULT_LOCKTYPE_POSIX
) != 0)
1668 set_bit(NFS_STATE_POSIX_LOCKS
, &state
->flags
);
1669 nfs4_opendata_put(opendata
);
1670 nfs4_put_state_owner(sp
);
1674 nfs4_opendata_put(opendata
);
1675 err_put_state_owner
:
1676 nfs4_put_state_owner(sp
);
1683 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
)
1685 struct nfs4_exception exception
= { };
1686 struct nfs4_state
*res
;
1690 status
= _nfs4_do_open(dir
, path
, fmode
, flags
, sattr
, cred
, &res
);
1693 /* NOTE: BAD_SEQID means the server and client disagree about the
1694 * book-keeping w.r.t. state-changing operations
1695 * (OPEN/CLOSE/LOCK/LOCKU...)
1696 * It is actually a sign of a bug on the client or on the server.
1698 * If we receive a BAD_SEQID error in the particular case of
1699 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1700 * have unhashed the old state_owner for us, and that we can
1701 * therefore safely retry using a new one. We should still warn
1702 * the user though...
1704 if (status
== -NFS4ERR_BAD_SEQID
) {
1705 printk(KERN_WARNING
"NFS: v4 server %s "
1706 " returned a bad sequence-id error!\n",
1707 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1708 exception
.retry
= 1;
1712 * BAD_STATEID on OPEN means that the server cancelled our
1713 * state before it received the OPEN_CONFIRM.
1714 * Recover by retrying the request as per the discussion
1715 * on Page 181 of RFC3530.
1717 if (status
== -NFS4ERR_BAD_STATEID
) {
1718 exception
.retry
= 1;
1721 if (status
== -EAGAIN
) {
1722 /* We must have found a delegation */
1723 exception
.retry
= 1;
1726 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1727 status
, &exception
));
1728 } while (exception
.retry
);
1732 static int _nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1733 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1734 struct nfs4_state
*state
)
1736 struct nfs_server
*server
= NFS_SERVER(inode
);
1737 struct nfs_setattrargs arg
= {
1738 .fh
= NFS_FH(inode
),
1741 .bitmask
= server
->attr_bitmask
,
1743 struct nfs_setattrres res
= {
1747 struct rpc_message msg
= {
1748 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1753 unsigned long timestamp
= jiffies
;
1756 nfs_fattr_init(fattr
);
1758 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1759 /* Use that stateid */
1760 } else if (state
!= NULL
) {
1761 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1763 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1765 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
1766 if (status
== 0 && state
!= NULL
)
1767 renew_lease(server
, timestamp
);
1771 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1772 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1773 struct nfs4_state
*state
)
1775 struct nfs_server
*server
= NFS_SERVER(inode
);
1776 struct nfs4_exception exception
= { };
1779 err
= nfs4_handle_exception(server
,
1780 _nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
),
1782 } while (exception
.retry
);
1786 struct nfs4_closedata
{
1788 struct inode
*inode
;
1789 struct nfs4_state
*state
;
1790 struct nfs_closeargs arg
;
1791 struct nfs_closeres res
;
1792 struct nfs_fattr fattr
;
1793 unsigned long timestamp
;
1796 static void nfs4_free_closedata(void *data
)
1798 struct nfs4_closedata
*calldata
= data
;
1799 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1801 nfs4_put_open_state(calldata
->state
);
1802 nfs_free_seqid(calldata
->arg
.seqid
);
1803 nfs4_put_state_owner(sp
);
1804 path_put(&calldata
->path
);
1808 static void nfs4_close_clear_stateid_flags(struct nfs4_state
*state
,
1811 spin_lock(&state
->owner
->so_lock
);
1812 if (!(fmode
& FMODE_READ
))
1813 clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1814 if (!(fmode
& FMODE_WRITE
))
1815 clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1816 clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1817 spin_unlock(&state
->owner
->so_lock
);
1820 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1822 struct nfs4_closedata
*calldata
= data
;
1823 struct nfs4_state
*state
= calldata
->state
;
1824 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1826 nfs4_sequence_done(server
, &calldata
->res
.seq_res
, task
->tk_status
);
1827 if (RPC_ASSASSINATED(task
))
1829 /* hmm. we are done with the inode, and in the process of freeing
1830 * the state_owner. we keep this around to process errors
1832 switch (task
->tk_status
) {
1834 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, 0);
1835 renew_lease(server
, calldata
->timestamp
);
1836 nfs4_close_clear_stateid_flags(state
,
1837 calldata
->arg
.fmode
);
1839 case -NFS4ERR_STALE_STATEID
:
1840 case -NFS4ERR_OLD_STATEID
:
1841 case -NFS4ERR_BAD_STATEID
:
1842 case -NFS4ERR_EXPIRED
:
1843 if (calldata
->arg
.fmode
== 0)
1846 if (nfs4_async_handle_error(task
, server
, state
) == -EAGAIN
)
1847 rpc_restart_call_prepare(task
);
1849 nfs_release_seqid(calldata
->arg
.seqid
);
1850 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1853 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1855 struct nfs4_closedata
*calldata
= data
;
1856 struct nfs4_state
*state
= calldata
->state
;
1859 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1862 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1863 calldata
->arg
.fmode
= FMODE_READ
|FMODE_WRITE
;
1864 spin_lock(&state
->owner
->so_lock
);
1865 /* Calculate the change in open mode */
1866 if (state
->n_rdwr
== 0) {
1867 if (state
->n_rdonly
== 0) {
1868 call_close
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1869 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1870 calldata
->arg
.fmode
&= ~FMODE_READ
;
1872 if (state
->n_wronly
== 0) {
1873 call_close
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1874 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1875 calldata
->arg
.fmode
&= ~FMODE_WRITE
;
1878 spin_unlock(&state
->owner
->so_lock
);
1881 /* Note: exit _without_ calling nfs4_close_done */
1882 task
->tk_action
= NULL
;
1886 if (calldata
->arg
.fmode
== 0)
1887 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
];
1889 nfs_fattr_init(calldata
->res
.fattr
);
1890 calldata
->timestamp
= jiffies
;
1891 if (nfs4_setup_sequence((NFS_SERVER(calldata
->inode
))->nfs_client
,
1892 &calldata
->arg
.seq_args
, &calldata
->res
.seq_res
,
1895 rpc_call_start(task
);
1898 static const struct rpc_call_ops nfs4_close_ops
= {
1899 .rpc_call_prepare
= nfs4_close_prepare
,
1900 .rpc_call_done
= nfs4_close_done
,
1901 .rpc_release
= nfs4_free_closedata
,
1905 * It is possible for data to be read/written from a mem-mapped file
1906 * after the sys_close call (which hits the vfs layer as a flush).
1907 * This means that we can't safely call nfsv4 close on a file until
1908 * the inode is cleared. This in turn means that we are not good
1909 * NFSv4 citizens - we do not indicate to the server to update the file's
1910 * share state even when we are done with one of the three share
1911 * stateid's in the inode.
1913 * NOTE: Caller must be holding the sp->so_owner semaphore!
1915 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
, int wait
)
1917 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1918 struct nfs4_closedata
*calldata
;
1919 struct nfs4_state_owner
*sp
= state
->owner
;
1920 struct rpc_task
*task
;
1921 struct rpc_message msg
= {
1922 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1923 .rpc_cred
= state
->owner
->so_cred
,
1925 struct rpc_task_setup task_setup_data
= {
1926 .rpc_client
= server
->client
,
1927 .rpc_message
= &msg
,
1928 .callback_ops
= &nfs4_close_ops
,
1929 .workqueue
= nfsiod_workqueue
,
1930 .flags
= RPC_TASK_ASYNC
,
1932 int status
= -ENOMEM
;
1934 calldata
= kzalloc(sizeof(*calldata
), GFP_KERNEL
);
1935 if (calldata
== NULL
)
1937 calldata
->inode
= state
->inode
;
1938 calldata
->state
= state
;
1939 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1940 calldata
->arg
.stateid
= &state
->open_stateid
;
1941 /* Serialization for the sequence id */
1942 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
1943 if (calldata
->arg
.seqid
== NULL
)
1944 goto out_free_calldata
;
1945 calldata
->arg
.fmode
= 0;
1946 calldata
->arg
.bitmask
= server
->cache_consistency_bitmask
;
1947 calldata
->res
.fattr
= &calldata
->fattr
;
1948 calldata
->res
.seqid
= calldata
->arg
.seqid
;
1949 calldata
->res
.server
= server
;
1950 calldata
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
1952 calldata
->path
= *path
;
1954 msg
.rpc_argp
= &calldata
->arg
,
1955 msg
.rpc_resp
= &calldata
->res
,
1956 task_setup_data
.callback_data
= calldata
;
1957 task
= rpc_run_task(&task_setup_data
);
1959 return PTR_ERR(task
);
1962 status
= rpc_wait_for_completion_task(task
);
1968 nfs4_put_open_state(state
);
1969 nfs4_put_state_owner(sp
);
1973 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
, fmode_t fmode
)
1978 /* If the open_intent is for execute, we have an extra check to make */
1979 if (fmode
& FMODE_EXEC
) {
1980 ret
= nfs_may_open(state
->inode
,
1981 state
->owner
->so_cred
,
1982 nd
->intent
.open
.flags
);
1986 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
1987 if (!IS_ERR(filp
)) {
1988 struct nfs_open_context
*ctx
;
1989 ctx
= nfs_file_open_context(filp
);
1993 ret
= PTR_ERR(filp
);
1995 nfs4_close_sync(path
, state
, fmode
& (FMODE_READ
|FMODE_WRITE
));
2000 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
2002 struct path path
= {
2003 .mnt
= nd
->path
.mnt
,
2006 struct dentry
*parent
;
2008 struct rpc_cred
*cred
;
2009 struct nfs4_state
*state
;
2011 fmode_t fmode
= nd
->intent
.open
.flags
& (FMODE_READ
| FMODE_WRITE
| FMODE_EXEC
);
2013 if (nd
->flags
& LOOKUP_CREATE
) {
2014 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
2015 attr
.ia_valid
= ATTR_MODE
;
2016 if (!IS_POSIXACL(dir
))
2017 attr
.ia_mode
&= ~current_umask();
2020 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
2023 cred
= rpc_lookup_cred();
2025 return (struct dentry
*)cred
;
2026 parent
= dentry
->d_parent
;
2027 /* Protect against concurrent sillydeletes */
2028 nfs_block_sillyrename(parent
);
2029 state
= nfs4_do_open(dir
, &path
, fmode
, nd
->intent
.open
.flags
, &attr
, cred
);
2031 if (IS_ERR(state
)) {
2032 if (PTR_ERR(state
) == -ENOENT
) {
2033 d_add(dentry
, NULL
);
2034 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2036 nfs_unblock_sillyrename(parent
);
2037 return (struct dentry
*)state
;
2039 res
= d_add_unique(dentry
, igrab(state
->inode
));
2042 nfs_set_verifier(path
.dentry
, nfs_save_change_attribute(dir
));
2043 nfs_unblock_sillyrename(parent
);
2044 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2049 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
2051 struct path path
= {
2052 .mnt
= nd
->path
.mnt
,
2055 struct rpc_cred
*cred
;
2056 struct nfs4_state
*state
;
2057 fmode_t fmode
= openflags
& (FMODE_READ
| FMODE_WRITE
);
2059 cred
= rpc_lookup_cred();
2061 return PTR_ERR(cred
);
2062 state
= nfs4_do_open(dir
, &path
, fmode
, openflags
, NULL
, cred
);
2064 if (IS_ERR(state
)) {
2065 switch (PTR_ERR(state
)) {
2071 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
2077 if (state
->inode
== dentry
->d_inode
) {
2078 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2079 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2082 nfs4_close_sync(&path
, state
, fmode
);
2088 static void nfs4_close_context(struct nfs_open_context
*ctx
, int is_sync
)
2090 if (ctx
->state
== NULL
)
2093 nfs4_close_sync(&ctx
->path
, ctx
->state
, ctx
->mode
);
2095 nfs4_close_state(&ctx
->path
, ctx
->state
, ctx
->mode
);
2098 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
2100 struct nfs4_server_caps_arg args
= {
2103 struct nfs4_server_caps_res res
= {};
2104 struct rpc_message msg
= {
2105 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
2111 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2113 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
2114 server
->caps
&= ~(NFS_CAP_ACLS
|NFS_CAP_HARDLINKS
|
2115 NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
2116 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|
2117 NFS_CAP_OWNER_GROUP
|NFS_CAP_ATIME
|
2118 NFS_CAP_CTIME
|NFS_CAP_MTIME
);
2119 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
2120 server
->caps
|= NFS_CAP_ACLS
;
2121 if (res
.has_links
!= 0)
2122 server
->caps
|= NFS_CAP_HARDLINKS
;
2123 if (res
.has_symlinks
!= 0)
2124 server
->caps
|= NFS_CAP_SYMLINKS
;
2125 if (res
.attr_bitmask
[0] & FATTR4_WORD0_FILEID
)
2126 server
->caps
|= NFS_CAP_FILEID
;
2127 if (res
.attr_bitmask
[1] & FATTR4_WORD1_MODE
)
2128 server
->caps
|= NFS_CAP_MODE
;
2129 if (res
.attr_bitmask
[1] & FATTR4_WORD1_NUMLINKS
)
2130 server
->caps
|= NFS_CAP_NLINK
;
2131 if (res
.attr_bitmask
[1] & FATTR4_WORD1_OWNER
)
2132 server
->caps
|= NFS_CAP_OWNER
;
2133 if (res
.attr_bitmask
[1] & FATTR4_WORD1_OWNER_GROUP
)
2134 server
->caps
|= NFS_CAP_OWNER_GROUP
;
2135 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_ACCESS
)
2136 server
->caps
|= NFS_CAP_ATIME
;
2137 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_METADATA
)
2138 server
->caps
|= NFS_CAP_CTIME
;
2139 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_MODIFY
)
2140 server
->caps
|= NFS_CAP_MTIME
;
2142 memcpy(server
->cache_consistency_bitmask
, res
.attr_bitmask
, sizeof(server
->cache_consistency_bitmask
));
2143 server
->cache_consistency_bitmask
[0] &= FATTR4_WORD0_CHANGE
|FATTR4_WORD0_SIZE
;
2144 server
->cache_consistency_bitmask
[1] &= FATTR4_WORD1_TIME_METADATA
|FATTR4_WORD1_TIME_MODIFY
;
2145 server
->acl_bitmask
= res
.acl_bitmask
;
2151 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
2153 struct nfs4_exception exception
= { };
2156 err
= nfs4_handle_exception(server
,
2157 _nfs4_server_capabilities(server
, fhandle
),
2159 } while (exception
.retry
);
2163 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2164 struct nfs_fsinfo
*info
)
2166 struct nfs4_lookup_root_arg args
= {
2167 .bitmask
= nfs4_fattr_bitmap
,
2169 struct nfs4_lookup_res res
= {
2171 .fattr
= info
->fattr
,
2174 struct rpc_message msg
= {
2175 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
2180 nfs_fattr_init(info
->fattr
);
2181 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2184 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2185 struct nfs_fsinfo
*info
)
2187 struct nfs4_exception exception
= { };
2190 err
= nfs4_handle_exception(server
,
2191 _nfs4_lookup_root(server
, fhandle
, info
),
2193 } while (exception
.retry
);
2198 * get the file handle for the "/" directory on the server
2200 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2201 struct nfs_fsinfo
*info
)
2205 status
= nfs4_lookup_root(server
, fhandle
, info
);
2207 status
= nfs4_server_capabilities(server
, fhandle
);
2209 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
2210 return nfs4_map_errors(status
);
2214 * Get locations and (maybe) other attributes of a referral.
2215 * Note that we'll actually follow the referral later when
2216 * we detect fsid mismatch in inode revalidation
2218 static int nfs4_get_referral(struct inode
*dir
, const struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
2220 int status
= -ENOMEM
;
2221 struct page
*page
= NULL
;
2222 struct nfs4_fs_locations
*locations
= NULL
;
2224 page
= alloc_page(GFP_KERNEL
);
2227 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
2228 if (locations
== NULL
)
2231 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
2234 /* Make sure server returned a different fsid for the referral */
2235 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
2236 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__
, name
->name
);
2241 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
2242 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
2244 fattr
->mode
= S_IFDIR
;
2245 memset(fhandle
, 0, sizeof(struct nfs_fh
));
2254 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2256 struct nfs4_getattr_arg args
= {
2258 .bitmask
= server
->attr_bitmask
,
2260 struct nfs4_getattr_res res
= {
2264 struct rpc_message msg
= {
2265 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
2270 nfs_fattr_init(fattr
);
2271 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2274 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2276 struct nfs4_exception exception
= { };
2279 err
= nfs4_handle_exception(server
,
2280 _nfs4_proc_getattr(server
, fhandle
, fattr
),
2282 } while (exception
.retry
);
2287 * The file is not closed if it is opened due to the a request to change
2288 * the size of the file. The open call will not be needed once the
2289 * VFS layer lookup-intents are implemented.
2291 * Close is called when the inode is destroyed.
2292 * If we haven't opened the file for O_WRONLY, we
2293 * need to in the size_change case to obtain a stateid.
2296 * Because OPEN is always done by name in nfsv4, it is
2297 * possible that we opened a different file by the same
2298 * name. We can recognize this race condition, but we
2299 * can't do anything about it besides returning an error.
2301 * This will be fixed with VFS changes (lookup-intent).
2304 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
2305 struct iattr
*sattr
)
2307 struct inode
*inode
= dentry
->d_inode
;
2308 struct rpc_cred
*cred
= NULL
;
2309 struct nfs4_state
*state
= NULL
;
2312 nfs_fattr_init(fattr
);
2314 /* Search for an existing open(O_WRITE) file */
2315 if (sattr
->ia_valid
& ATTR_FILE
) {
2316 struct nfs_open_context
*ctx
;
2318 ctx
= nfs_file_open_context(sattr
->ia_file
);
2325 status
= nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
);
2327 nfs_setattr_update_inode(inode
, sattr
);
2331 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, const struct nfs_fh
*dirfh
,
2332 const struct qstr
*name
, struct nfs_fh
*fhandle
,
2333 struct nfs_fattr
*fattr
)
2336 struct nfs4_lookup_arg args
= {
2337 .bitmask
= server
->attr_bitmask
,
2341 struct nfs4_lookup_res res
= {
2346 struct rpc_message msg
= {
2347 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
2352 nfs_fattr_init(fattr
);
2354 dprintk("NFS call lookupfh %s\n", name
->name
);
2355 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2356 dprintk("NFS reply lookupfh: %d\n", status
);
2360 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
2361 struct qstr
*name
, struct nfs_fh
*fhandle
,
2362 struct nfs_fattr
*fattr
)
2364 struct nfs4_exception exception
= { };
2367 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
2369 if (err
== -NFS4ERR_MOVED
) {
2373 err
= nfs4_handle_exception(server
, err
, &exception
);
2374 } while (exception
.retry
);
2378 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
,
2379 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2383 dprintk("NFS call lookup %s\n", name
->name
);
2384 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
2385 if (status
== -NFS4ERR_MOVED
)
2386 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
2387 dprintk("NFS reply lookup: %d\n", status
);
2391 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2393 struct nfs4_exception exception
= { };
2396 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2397 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
2399 } while (exception
.retry
);
2403 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
2405 struct nfs_server
*server
= NFS_SERVER(inode
);
2406 struct nfs_fattr fattr
;
2407 struct nfs4_accessargs args
= {
2408 .fh
= NFS_FH(inode
),
2409 .bitmask
= server
->attr_bitmask
,
2411 struct nfs4_accessres res
= {
2415 struct rpc_message msg
= {
2416 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
2419 .rpc_cred
= entry
->cred
,
2421 int mode
= entry
->mask
;
2425 * Determine which access bits we want to ask for...
2427 if (mode
& MAY_READ
)
2428 args
.access
|= NFS4_ACCESS_READ
;
2429 if (S_ISDIR(inode
->i_mode
)) {
2430 if (mode
& MAY_WRITE
)
2431 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
2432 if (mode
& MAY_EXEC
)
2433 args
.access
|= NFS4_ACCESS_LOOKUP
;
2435 if (mode
& MAY_WRITE
)
2436 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
2437 if (mode
& MAY_EXEC
)
2438 args
.access
|= NFS4_ACCESS_EXECUTE
;
2440 nfs_fattr_init(&fattr
);
2441 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2444 if (res
.access
& NFS4_ACCESS_READ
)
2445 entry
->mask
|= MAY_READ
;
2446 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
2447 entry
->mask
|= MAY_WRITE
;
2448 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
2449 entry
->mask
|= MAY_EXEC
;
2450 nfs_refresh_inode(inode
, &fattr
);
2455 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
2457 struct nfs4_exception exception
= { };
2460 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2461 _nfs4_proc_access(inode
, entry
),
2463 } while (exception
.retry
);
2468 * TODO: For the time being, we don't try to get any attributes
2469 * along with any of the zero-copy operations READ, READDIR,
2472 * In the case of the first three, we want to put the GETATTR
2473 * after the read-type operation -- this is because it is hard
2474 * to predict the length of a GETATTR response in v4, and thus
2475 * align the READ data correctly. This means that the GETATTR
2476 * may end up partially falling into the page cache, and we should
2477 * shift it into the 'tail' of the xdr_buf before processing.
2478 * To do this efficiently, we need to know the total length
2479 * of data received, which doesn't seem to be available outside
2482 * In the case of WRITE, we also want to put the GETATTR after
2483 * the operation -- in this case because we want to make sure
2484 * we get the post-operation mtime and size. This means that
2485 * we can't use xdr_encode_pages() as written: we need a variant
2486 * of it which would leave room in the 'tail' iovec.
2488 * Both of these changes to the XDR layer would in fact be quite
2489 * minor, but I decided to leave them for a subsequent patch.
2491 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2492 unsigned int pgbase
, unsigned int pglen
)
2494 struct nfs4_readlink args
= {
2495 .fh
= NFS_FH(inode
),
2500 struct nfs4_readlink_res res
;
2501 struct rpc_message msg
= {
2502 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
2507 return nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
2510 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2511 unsigned int pgbase
, unsigned int pglen
)
2513 struct nfs4_exception exception
= { };
2516 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2517 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
2519 } while (exception
.retry
);
2525 * We will need to arrange for the VFS layer to provide an atomic open.
2526 * Until then, this create/open method is prone to inefficiency and race
2527 * conditions due to the lookup, create, and open VFS calls from sys_open()
2528 * placed on the wire.
2530 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2531 * The file will be opened again in the subsequent VFS open call
2532 * (nfs4_proc_file_open).
2534 * The open for read will just hang around to be used by any process that
2535 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2539 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
2540 int flags
, struct nameidata
*nd
)
2542 struct path path
= {
2543 .mnt
= nd
->path
.mnt
,
2546 struct nfs4_state
*state
;
2547 struct rpc_cred
*cred
;
2548 fmode_t fmode
= flags
& (FMODE_READ
| FMODE_WRITE
);
2551 cred
= rpc_lookup_cred();
2553 status
= PTR_ERR(cred
);
2556 state
= nfs4_do_open(dir
, &path
, fmode
, flags
, sattr
, cred
);
2558 if (IS_ERR(state
)) {
2559 status
= PTR_ERR(state
);
2562 d_add(dentry
, igrab(state
->inode
));
2563 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2564 if (flags
& O_EXCL
) {
2565 struct nfs_fattr fattr
;
2566 status
= nfs4_do_setattr(state
->inode
, cred
, &fattr
, sattr
, state
);
2568 nfs_setattr_update_inode(state
->inode
, sattr
);
2569 nfs_post_op_update_inode(state
->inode
, &fattr
);
2571 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
2572 status
= nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2574 nfs4_close_sync(&path
, state
, fmode
);
2581 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2583 struct nfs_server
*server
= NFS_SERVER(dir
);
2584 struct nfs_removeargs args
= {
2586 .name
.len
= name
->len
,
2587 .name
.name
= name
->name
,
2588 .bitmask
= server
->attr_bitmask
,
2590 struct nfs_removeres res
= {
2593 struct rpc_message msg
= {
2594 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
2600 nfs_fattr_init(&res
.dir_attr
);
2601 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 1);
2603 update_changeattr(dir
, &res
.cinfo
);
2604 nfs_post_op_update_inode(dir
, &res
.dir_attr
);
2609 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2611 struct nfs4_exception exception
= { };
2614 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2615 _nfs4_proc_remove(dir
, name
),
2617 } while (exception
.retry
);
2621 static void nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct inode
*dir
)
2623 struct nfs_server
*server
= NFS_SERVER(dir
);
2624 struct nfs_removeargs
*args
= msg
->rpc_argp
;
2625 struct nfs_removeres
*res
= msg
->rpc_resp
;
2627 args
->bitmask
= server
->cache_consistency_bitmask
;
2628 res
->server
= server
;
2629 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
2632 static int nfs4_proc_unlink_done(struct rpc_task
*task
, struct inode
*dir
)
2634 struct nfs_removeres
*res
= task
->tk_msg
.rpc_resp
;
2636 nfs4_sequence_done(res
->server
, &res
->seq_res
, task
->tk_status
);
2637 if (nfs4_async_handle_error(task
, res
->server
, NULL
) == -EAGAIN
)
2639 update_changeattr(dir
, &res
->cinfo
);
2640 nfs_post_op_update_inode(dir
, &res
->dir_attr
);
2644 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2645 struct inode
*new_dir
, struct qstr
*new_name
)
2647 struct nfs_server
*server
= NFS_SERVER(old_dir
);
2648 struct nfs4_rename_arg arg
= {
2649 .old_dir
= NFS_FH(old_dir
),
2650 .new_dir
= NFS_FH(new_dir
),
2651 .old_name
= old_name
,
2652 .new_name
= new_name
,
2653 .bitmask
= server
->attr_bitmask
,
2655 struct nfs_fattr old_fattr
, new_fattr
;
2656 struct nfs4_rename_res res
= {
2658 .old_fattr
= &old_fattr
,
2659 .new_fattr
= &new_fattr
,
2661 struct rpc_message msg
= {
2662 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2668 nfs_fattr_init(res
.old_fattr
);
2669 nfs_fattr_init(res
.new_fattr
);
2670 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2673 update_changeattr(old_dir
, &res
.old_cinfo
);
2674 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2675 update_changeattr(new_dir
, &res
.new_cinfo
);
2676 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2681 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2682 struct inode
*new_dir
, struct qstr
*new_name
)
2684 struct nfs4_exception exception
= { };
2687 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2688 _nfs4_proc_rename(old_dir
, old_name
,
2691 } while (exception
.retry
);
2695 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2697 struct nfs_server
*server
= NFS_SERVER(inode
);
2698 struct nfs4_link_arg arg
= {
2699 .fh
= NFS_FH(inode
),
2700 .dir_fh
= NFS_FH(dir
),
2702 .bitmask
= server
->attr_bitmask
,
2704 struct nfs_fattr fattr
, dir_attr
;
2705 struct nfs4_link_res res
= {
2708 .dir_attr
= &dir_attr
,
2710 struct rpc_message msg
= {
2711 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2717 nfs_fattr_init(res
.fattr
);
2718 nfs_fattr_init(res
.dir_attr
);
2719 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2721 update_changeattr(dir
, &res
.cinfo
);
2722 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2723 nfs_post_op_update_inode(inode
, res
.fattr
);
2729 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2731 struct nfs4_exception exception
= { };
2734 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2735 _nfs4_proc_link(inode
, dir
, name
),
2737 } while (exception
.retry
);
2741 struct nfs4_createdata
{
2742 struct rpc_message msg
;
2743 struct nfs4_create_arg arg
;
2744 struct nfs4_create_res res
;
2746 struct nfs_fattr fattr
;
2747 struct nfs_fattr dir_fattr
;
2750 static struct nfs4_createdata
*nfs4_alloc_createdata(struct inode
*dir
,
2751 struct qstr
*name
, struct iattr
*sattr
, u32 ftype
)
2753 struct nfs4_createdata
*data
;
2755 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
2757 struct nfs_server
*server
= NFS_SERVER(dir
);
2759 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
];
2760 data
->msg
.rpc_argp
= &data
->arg
;
2761 data
->msg
.rpc_resp
= &data
->res
;
2762 data
->arg
.dir_fh
= NFS_FH(dir
);
2763 data
->arg
.server
= server
;
2764 data
->arg
.name
= name
;
2765 data
->arg
.attrs
= sattr
;
2766 data
->arg
.ftype
= ftype
;
2767 data
->arg
.bitmask
= server
->attr_bitmask
;
2768 data
->res
.server
= server
;
2769 data
->res
.fh
= &data
->fh
;
2770 data
->res
.fattr
= &data
->fattr
;
2771 data
->res
.dir_fattr
= &data
->dir_fattr
;
2772 nfs_fattr_init(data
->res
.fattr
);
2773 nfs_fattr_init(data
->res
.dir_fattr
);
2778 static int nfs4_do_create(struct inode
*dir
, struct dentry
*dentry
, struct nfs4_createdata
*data
)
2780 int status
= nfs4_call_sync(NFS_SERVER(dir
), &data
->msg
,
2781 &data
->arg
, &data
->res
, 1);
2783 update_changeattr(dir
, &data
->res
.dir_cinfo
);
2784 nfs_post_op_update_inode(dir
, data
->res
.dir_fattr
);
2785 status
= nfs_instantiate(dentry
, data
->res
.fh
, data
->res
.fattr
);
2790 static void nfs4_free_createdata(struct nfs4_createdata
*data
)
2795 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2796 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2798 struct nfs4_createdata
*data
;
2799 int status
= -ENAMETOOLONG
;
2801 if (len
> NFS4_MAXPATHLEN
)
2805 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4LNK
);
2809 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
];
2810 data
->arg
.u
.symlink
.pages
= &page
;
2811 data
->arg
.u
.symlink
.len
= len
;
2813 status
= nfs4_do_create(dir
, dentry
, data
);
2815 nfs4_free_createdata(data
);
2820 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2821 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2823 struct nfs4_exception exception
= { };
2826 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2827 _nfs4_proc_symlink(dir
, dentry
, page
,
2830 } while (exception
.retry
);
2834 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2835 struct iattr
*sattr
)
2837 struct nfs4_createdata
*data
;
2838 int status
= -ENOMEM
;
2840 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4DIR
);
2844 status
= nfs4_do_create(dir
, dentry
, data
);
2846 nfs4_free_createdata(data
);
2851 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2852 struct iattr
*sattr
)
2854 struct nfs4_exception exception
= { };
2857 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2858 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2860 } while (exception
.retry
);
2864 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2865 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2867 struct inode
*dir
= dentry
->d_inode
;
2868 struct nfs4_readdir_arg args
= {
2873 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
2875 struct nfs4_readdir_res res
;
2876 struct rpc_message msg
= {
2877 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2884 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__
,
2885 dentry
->d_parent
->d_name
.name
,
2886 dentry
->d_name
.name
,
2887 (unsigned long long)cookie
);
2888 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2889 res
.pgbase
= args
.pgbase
;
2890 status
= nfs4_call_sync(NFS_SERVER(dir
), &msg
, &args
, &res
, 0);
2892 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2894 nfs_invalidate_atime(dir
);
2896 dprintk("%s: returns %d\n", __func__
, status
);
2900 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2901 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2903 struct nfs4_exception exception
= { };
2906 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2907 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2910 } while (exception
.retry
);
2914 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2915 struct iattr
*sattr
, dev_t rdev
)
2917 struct nfs4_createdata
*data
;
2918 int mode
= sattr
->ia_mode
;
2919 int status
= -ENOMEM
;
2921 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2922 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2924 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4SOCK
);
2929 data
->arg
.ftype
= NF4FIFO
;
2930 else if (S_ISBLK(mode
)) {
2931 data
->arg
.ftype
= NF4BLK
;
2932 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2933 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2935 else if (S_ISCHR(mode
)) {
2936 data
->arg
.ftype
= NF4CHR
;
2937 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2938 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2941 status
= nfs4_do_create(dir
, dentry
, data
);
2943 nfs4_free_createdata(data
);
2948 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2949 struct iattr
*sattr
, dev_t rdev
)
2951 struct nfs4_exception exception
= { };
2954 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2955 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2957 } while (exception
.retry
);
2961 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2962 struct nfs_fsstat
*fsstat
)
2964 struct nfs4_statfs_arg args
= {
2966 .bitmask
= server
->attr_bitmask
,
2968 struct nfs4_statfs_res res
= {
2971 struct rpc_message msg
= {
2972 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2977 nfs_fattr_init(fsstat
->fattr
);
2978 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2981 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2983 struct nfs4_exception exception
= { };
2986 err
= nfs4_handle_exception(server
,
2987 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2989 } while (exception
.retry
);
2993 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2994 struct nfs_fsinfo
*fsinfo
)
2996 struct nfs4_fsinfo_arg args
= {
2998 .bitmask
= server
->attr_bitmask
,
3000 struct nfs4_fsinfo_res res
= {
3003 struct rpc_message msg
= {
3004 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
3009 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
3012 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
3014 struct nfs4_exception exception
= { };
3018 err
= nfs4_handle_exception(server
,
3019 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
3021 } while (exception
.retry
);
3025 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
3027 nfs_fattr_init(fsinfo
->fattr
);
3028 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
3031 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3032 struct nfs_pathconf
*pathconf
)
3034 struct nfs4_pathconf_arg args
= {
3036 .bitmask
= server
->attr_bitmask
,
3038 struct nfs4_pathconf_res res
= {
3039 .pathconf
= pathconf
,
3041 struct rpc_message msg
= {
3042 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
3047 /* None of the pathconf attributes are mandatory to implement */
3048 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
3049 memset(pathconf
, 0, sizeof(*pathconf
));
3053 nfs_fattr_init(pathconf
->fattr
);
3054 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
3057 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3058 struct nfs_pathconf
*pathconf
)
3060 struct nfs4_exception exception
= { };
3064 err
= nfs4_handle_exception(server
,
3065 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
3067 } while (exception
.retry
);
3071 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
3073 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
3075 dprintk("--> %s\n", __func__
);
3077 nfs4_sequence_done(server
, &data
->res
.seq_res
, task
->tk_status
);
3079 if (nfs4_async_handle_error(task
, server
, data
->args
.context
->state
) == -EAGAIN
) {
3080 nfs_restart_rpc(task
, server
->nfs_client
);
3084 nfs_invalidate_atime(data
->inode
);
3085 if (task
->tk_status
> 0)
3086 renew_lease(server
, data
->timestamp
);
3090 static void nfs4_proc_read_setup(struct nfs_read_data
*data
, struct rpc_message
*msg
)
3092 data
->timestamp
= jiffies
;
3093 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
];
3096 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
3098 struct inode
*inode
= data
->inode
;
3100 nfs4_sequence_done(NFS_SERVER(inode
), &data
->res
.seq_res
,
3103 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), data
->args
.context
->state
) == -EAGAIN
) {
3104 nfs_restart_rpc(task
, NFS_SERVER(inode
)->nfs_client
);
3107 if (task
->tk_status
>= 0) {
3108 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
3109 nfs_post_op_update_inode_force_wcc(inode
, data
->res
.fattr
);
3114 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
3116 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
3118 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
3119 data
->res
.server
= server
;
3120 data
->timestamp
= jiffies
;
3122 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
];
3125 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
3127 struct inode
*inode
= data
->inode
;
3129 nfs4_sequence_done(NFS_SERVER(inode
), &data
->res
.seq_res
,
3131 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), NULL
) == -EAGAIN
) {
3132 nfs_restart_rpc(task
, NFS_SERVER(inode
)->nfs_client
);
3135 nfs_refresh_inode(inode
, data
->res
.fattr
);
3139 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
3141 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
3143 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
3144 data
->res
.server
= server
;
3145 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
];
3149 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3150 * standalone procedure for queueing an asynchronous RENEW.
3152 static void nfs4_renew_release(void *data
)
3154 struct nfs_client
*clp
= data
;
3156 if (atomic_read(&clp
->cl_count
) > 1)
3157 nfs4_schedule_state_renewal(clp
);
3158 nfs_put_client(clp
);
3161 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
3163 struct nfs_client
*clp
= data
;
3164 unsigned long timestamp
= task
->tk_start
;
3166 if (task
->tk_status
< 0) {
3167 /* Unless we're shutting down, schedule state recovery! */
3168 if (test_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
) != 0)
3169 nfs4_schedule_state_recovery(clp
);
3172 spin_lock(&clp
->cl_lock
);
3173 if (time_before(clp
->cl_last_renewal
,timestamp
))
3174 clp
->cl_last_renewal
= timestamp
;
3175 spin_unlock(&clp
->cl_lock
);
3178 static const struct rpc_call_ops nfs4_renew_ops
= {
3179 .rpc_call_done
= nfs4_renew_done
,
3180 .rpc_release
= nfs4_renew_release
,
3183 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3185 struct rpc_message msg
= {
3186 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
3191 if (!atomic_inc_not_zero(&clp
->cl_count
))
3193 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
3194 &nfs4_renew_ops
, clp
);
3197 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3199 struct rpc_message msg
= {
3200 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
3204 unsigned long now
= jiffies
;
3207 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3210 spin_lock(&clp
->cl_lock
);
3211 if (time_before(clp
->cl_last_renewal
,now
))
3212 clp
->cl_last_renewal
= now
;
3213 spin_unlock(&clp
->cl_lock
);
3217 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
3219 return (server
->caps
& NFS_CAP_ACLS
)
3220 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
3221 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
3224 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3225 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3228 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3230 static void buf_to_pages(const void *buf
, size_t buflen
,
3231 struct page
**pages
, unsigned int *pgbase
)
3233 const void *p
= buf
;
3235 *pgbase
= offset_in_page(buf
);
3237 while (p
< buf
+ buflen
) {
3238 *(pages
++) = virt_to_page(p
);
3239 p
+= PAGE_CACHE_SIZE
;
3243 struct nfs4_cached_acl
{
3249 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
3251 struct nfs_inode
*nfsi
= NFS_I(inode
);
3253 spin_lock(&inode
->i_lock
);
3254 kfree(nfsi
->nfs4_acl
);
3255 nfsi
->nfs4_acl
= acl
;
3256 spin_unlock(&inode
->i_lock
);
3259 static void nfs4_zap_acl_attr(struct inode
*inode
)
3261 nfs4_set_cached_acl(inode
, NULL
);
3264 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
3266 struct nfs_inode
*nfsi
= NFS_I(inode
);
3267 struct nfs4_cached_acl
*acl
;
3270 spin_lock(&inode
->i_lock
);
3271 acl
= nfsi
->nfs4_acl
;
3274 if (buf
== NULL
) /* user is just asking for length */
3276 if (acl
->cached
== 0)
3278 ret
= -ERANGE
; /* see getxattr(2) man page */
3279 if (acl
->len
> buflen
)
3281 memcpy(buf
, acl
->data
, acl
->len
);
3285 spin_unlock(&inode
->i_lock
);
3289 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
3291 struct nfs4_cached_acl
*acl
;
3293 if (buf
&& acl_len
<= PAGE_SIZE
) {
3294 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
3298 memcpy(acl
->data
, buf
, acl_len
);
3300 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
3307 nfs4_set_cached_acl(inode
, acl
);
3310 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3312 struct page
*pages
[NFS4ACL_MAXPAGES
];
3313 struct nfs_getaclargs args
= {
3314 .fh
= NFS_FH(inode
),
3318 struct nfs_getaclres res
= {
3322 struct rpc_message msg
= {
3323 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
3327 struct page
*localpage
= NULL
;
3330 if (buflen
< PAGE_SIZE
) {
3331 /* As long as we're doing a round trip to the server anyway,
3332 * let's be prepared for a page of acl data. */
3333 localpage
= alloc_page(GFP_KERNEL
);
3334 resp_buf
= page_address(localpage
);
3335 if (localpage
== NULL
)
3337 args
.acl_pages
[0] = localpage
;
3338 args
.acl_pgbase
= 0;
3339 args
.acl_len
= PAGE_SIZE
;
3342 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
3344 ret
= nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
3347 if (res
.acl_len
> args
.acl_len
)
3348 nfs4_write_cached_acl(inode
, NULL
, res
.acl_len
);
3350 nfs4_write_cached_acl(inode
, resp_buf
, res
.acl_len
);
3353 if (res
.acl_len
> buflen
)
3356 memcpy(buf
, resp_buf
, res
.acl_len
);
3361 __free_page(localpage
);
3365 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3367 struct nfs4_exception exception
= { };
3370 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
3373 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
3374 } while (exception
.retry
);
3378 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
3380 struct nfs_server
*server
= NFS_SERVER(inode
);
3383 if (!nfs4_server_supports_acls(server
))
3385 ret
= nfs_revalidate_inode(server
, inode
);
3388 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
3391 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
3394 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3396 struct nfs_server
*server
= NFS_SERVER(inode
);
3397 struct page
*pages
[NFS4ACL_MAXPAGES
];
3398 struct nfs_setaclargs arg
= {
3399 .fh
= NFS_FH(inode
),
3403 struct nfs_setaclres res
;
3404 struct rpc_message msg
= {
3405 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
3411 if (!nfs4_server_supports_acls(server
))
3413 nfs_inode_return_delegation(inode
);
3414 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
3415 ret
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
3416 nfs_access_zap_cache(inode
);
3417 nfs_zap_acl_cache(inode
);
3421 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3423 struct nfs4_exception exception
= { };
3426 err
= nfs4_handle_exception(NFS_SERVER(inode
),
3427 __nfs4_proc_set_acl(inode
, buf
, buflen
),
3429 } while (exception
.retry
);
3434 _nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs_client
*clp
, struct nfs4_state
*state
)
3436 if (!clp
|| task
->tk_status
>= 0)
3438 switch(task
->tk_status
) {
3439 case -NFS4ERR_ADMIN_REVOKED
:
3440 case -NFS4ERR_BAD_STATEID
:
3441 case -NFS4ERR_OPENMODE
:
3444 nfs4_state_mark_reclaim_nograce(clp
, state
);
3445 goto do_state_recovery
;
3446 case -NFS4ERR_STALE_STATEID
:
3449 nfs4_state_mark_reclaim_reboot(clp
, state
);
3450 case -NFS4ERR_STALE_CLIENTID
:
3451 case -NFS4ERR_EXPIRED
:
3452 goto do_state_recovery
;
3453 #if defined(CONFIG_NFS_V4_1)
3454 case -NFS4ERR_BADSESSION
:
3455 case -NFS4ERR_BADSLOT
:
3456 case -NFS4ERR_BAD_HIGH_SLOT
:
3457 case -NFS4ERR_DEADSESSION
:
3458 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
3459 case -NFS4ERR_SEQ_FALSE_RETRY
:
3460 case -NFS4ERR_SEQ_MISORDERED
:
3461 dprintk("%s ERROR %d, Reset session\n", __func__
,
3463 nfs4_schedule_state_recovery(clp
);
3464 task
->tk_status
= 0;
3466 #endif /* CONFIG_NFS_V4_1 */
3467 case -NFS4ERR_DELAY
:
3469 nfs_inc_server_stats(server
, NFSIOS_DELAY
);
3470 case -NFS4ERR_GRACE
:
3472 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
3473 task
->tk_status
= 0;
3475 case -NFS4ERR_OLD_STATEID
:
3476 task
->tk_status
= 0;
3479 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
3482 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
);
3483 nfs4_schedule_state_recovery(clp
);
3484 if (test_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) == 0)
3485 rpc_wake_up_queued_task(&clp
->cl_rpcwaitq
, task
);
3486 task
->tk_status
= 0;
3491 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs4_state
*state
)
3493 return _nfs4_async_handle_error(task
, server
, server
->nfs_client
, state
);
3496 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
3498 nfs4_verifier sc_verifier
;
3499 struct nfs4_setclientid setclientid
= {
3500 .sc_verifier
= &sc_verifier
,
3503 struct rpc_message msg
= {
3504 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
3505 .rpc_argp
= &setclientid
,
3513 p
= (__be32
*)sc_verifier
.data
;
3514 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
3515 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
3518 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
3519 sizeof(setclientid
.sc_name
), "%s/%s %s %s %u",
3521 rpc_peeraddr2str(clp
->cl_rpcclient
,
3523 rpc_peeraddr2str(clp
->cl_rpcclient
,
3525 clp
->cl_rpcclient
->cl_auth
->au_ops
->au_name
,
3526 clp
->cl_id_uniquifier
);
3527 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
3528 sizeof(setclientid
.sc_netid
),
3529 rpc_peeraddr2str(clp
->cl_rpcclient
,
3530 RPC_DISPLAY_NETID
));
3531 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
3532 sizeof(setclientid
.sc_uaddr
), "%s.%u.%u",
3533 clp
->cl_ipaddr
, port
>> 8, port
& 255);
3535 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3536 if (status
!= -NFS4ERR_CLID_INUSE
)
3541 ssleep(clp
->cl_lease_time
+ 1);
3543 if (++clp
->cl_id_uniquifier
== 0)
3549 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3551 struct nfs_fsinfo fsinfo
;
3552 struct rpc_message msg
= {
3553 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
3555 .rpc_resp
= &fsinfo
,
3562 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3564 spin_lock(&clp
->cl_lock
);
3565 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
3566 clp
->cl_last_renewal
= now
;
3567 spin_unlock(&clp
->cl_lock
);
3572 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3577 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
3581 case -NFS4ERR_RESOURCE
:
3582 /* The IBM lawyers misread another document! */
3583 case -NFS4ERR_DELAY
:
3585 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
3591 struct nfs4_delegreturndata
{
3592 struct nfs4_delegreturnargs args
;
3593 struct nfs4_delegreturnres res
;
3595 nfs4_stateid stateid
;
3596 unsigned long timestamp
;
3597 struct nfs_fattr fattr
;
3601 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3603 struct nfs4_delegreturndata
*data
= calldata
;
3605 nfs4_sequence_done(data
->res
.server
, &data
->res
.seq_res
,
3608 switch (task
->tk_status
) {
3609 case -NFS4ERR_STALE_STATEID
:
3610 case -NFS4ERR_EXPIRED
:
3612 renew_lease(data
->res
.server
, data
->timestamp
);
3615 if (nfs4_async_handle_error(task
, data
->res
.server
, NULL
) ==
3617 nfs_restart_rpc(task
, data
->res
.server
->nfs_client
);
3621 data
->rpc_status
= task
->tk_status
;
3624 static void nfs4_delegreturn_release(void *calldata
)
3629 #if defined(CONFIG_NFS_V4_1)
3630 static void nfs4_delegreturn_prepare(struct rpc_task
*task
, void *data
)
3632 struct nfs4_delegreturndata
*d_data
;
3634 d_data
= (struct nfs4_delegreturndata
*)data
;
3636 if (nfs4_setup_sequence(d_data
->res
.server
->nfs_client
,
3637 &d_data
->args
.seq_args
,
3638 &d_data
->res
.seq_res
, 1, task
))
3640 rpc_call_start(task
);
3642 #endif /* CONFIG_NFS_V4_1 */
3644 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3645 #if defined(CONFIG_NFS_V4_1)
3646 .rpc_call_prepare
= nfs4_delegreturn_prepare
,
3647 #endif /* CONFIG_NFS_V4_1 */
3648 .rpc_call_done
= nfs4_delegreturn_done
,
3649 .rpc_release
= nfs4_delegreturn_release
,
3652 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3654 struct nfs4_delegreturndata
*data
;
3655 struct nfs_server
*server
= NFS_SERVER(inode
);
3656 struct rpc_task
*task
;
3657 struct rpc_message msg
= {
3658 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3661 struct rpc_task_setup task_setup_data
= {
3662 .rpc_client
= server
->client
,
3663 .rpc_message
= &msg
,
3664 .callback_ops
= &nfs4_delegreturn_ops
,
3665 .flags
= RPC_TASK_ASYNC
,
3669 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
3672 data
->args
.fhandle
= &data
->fh
;
3673 data
->args
.stateid
= &data
->stateid
;
3674 data
->args
.bitmask
= server
->attr_bitmask
;
3675 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3676 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3677 data
->res
.fattr
= &data
->fattr
;
3678 data
->res
.server
= server
;
3679 data
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3680 nfs_fattr_init(data
->res
.fattr
);
3681 data
->timestamp
= jiffies
;
3682 data
->rpc_status
= 0;
3684 task_setup_data
.callback_data
= data
;
3685 msg
.rpc_argp
= &data
->args
,
3686 msg
.rpc_resp
= &data
->res
,
3687 task
= rpc_run_task(&task_setup_data
);
3689 return PTR_ERR(task
);
3692 status
= nfs4_wait_for_completion_rpc_task(task
);
3695 status
= data
->rpc_status
;
3698 nfs_refresh_inode(inode
, &data
->fattr
);
3704 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3706 struct nfs_server
*server
= NFS_SERVER(inode
);
3707 struct nfs4_exception exception
= { };
3710 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
, issync
);
3712 case -NFS4ERR_STALE_STATEID
:
3713 case -NFS4ERR_EXPIRED
:
3717 err
= nfs4_handle_exception(server
, err
, &exception
);
3718 } while (exception
.retry
);
3722 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3723 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3726 * sleep, with exponential backoff, and retry the LOCK operation.
3728 static unsigned long
3729 nfs4_set_lock_task_retry(unsigned long timeout
)
3731 schedule_timeout_killable(timeout
);
3733 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3734 return NFS4_LOCK_MAXTIMEOUT
;
3738 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3740 struct inode
*inode
= state
->inode
;
3741 struct nfs_server
*server
= NFS_SERVER(inode
);
3742 struct nfs_client
*clp
= server
->nfs_client
;
3743 struct nfs_lockt_args arg
= {
3744 .fh
= NFS_FH(inode
),
3747 struct nfs_lockt_res res
= {
3750 struct rpc_message msg
= {
3751 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3754 .rpc_cred
= state
->owner
->so_cred
,
3756 struct nfs4_lock_state
*lsp
;
3759 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3760 status
= nfs4_set_lock_state(state
, request
);
3763 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3764 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3765 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
3768 request
->fl_type
= F_UNLCK
;
3770 case -NFS4ERR_DENIED
:
3773 request
->fl_ops
->fl_release_private(request
);
3778 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3780 struct nfs4_exception exception
= { };
3784 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3785 _nfs4_proc_getlk(state
, cmd
, request
),
3787 } while (exception
.retry
);
3791 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3794 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3796 res
= posix_lock_file_wait(file
, fl
);
3799 res
= flock_lock_file_wait(file
, fl
);
3807 struct nfs4_unlockdata
{
3808 struct nfs_locku_args arg
;
3809 struct nfs_locku_res res
;
3810 struct nfs4_lock_state
*lsp
;
3811 struct nfs_open_context
*ctx
;
3812 struct file_lock fl
;
3813 const struct nfs_server
*server
;
3814 unsigned long timestamp
;
3817 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3818 struct nfs_open_context
*ctx
,
3819 struct nfs4_lock_state
*lsp
,
3820 struct nfs_seqid
*seqid
)
3822 struct nfs4_unlockdata
*p
;
3823 struct inode
*inode
= lsp
->ls_state
->inode
;
3825 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3828 p
->arg
.fh
= NFS_FH(inode
);
3830 p
->arg
.seqid
= seqid
;
3831 p
->res
.seqid
= seqid
;
3832 p
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3833 p
->arg
.stateid
= &lsp
->ls_stateid
;
3835 atomic_inc(&lsp
->ls_count
);
3836 /* Ensure we don't close file until we're done freeing locks! */
3837 p
->ctx
= get_nfs_open_context(ctx
);
3838 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3839 p
->server
= NFS_SERVER(inode
);
3843 static void nfs4_locku_release_calldata(void *data
)
3845 struct nfs4_unlockdata
*calldata
= data
;
3846 nfs_free_seqid(calldata
->arg
.seqid
);
3847 nfs4_put_lock_state(calldata
->lsp
);
3848 put_nfs_open_context(calldata
->ctx
);
3852 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3854 struct nfs4_unlockdata
*calldata
= data
;
3856 nfs4_sequence_done(calldata
->server
, &calldata
->res
.seq_res
,
3858 if (RPC_ASSASSINATED(task
))
3860 switch (task
->tk_status
) {
3862 memcpy(calldata
->lsp
->ls_stateid
.data
,
3863 calldata
->res
.stateid
.data
,
3864 sizeof(calldata
->lsp
->ls_stateid
.data
));
3865 renew_lease(calldata
->server
, calldata
->timestamp
);
3867 case -NFS4ERR_BAD_STATEID
:
3868 case -NFS4ERR_OLD_STATEID
:
3869 case -NFS4ERR_STALE_STATEID
:
3870 case -NFS4ERR_EXPIRED
:
3873 if (nfs4_async_handle_error(task
, calldata
->server
, NULL
) == -EAGAIN
)
3874 nfs_restart_rpc(task
,
3875 calldata
->server
->nfs_client
);
3879 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3881 struct nfs4_unlockdata
*calldata
= data
;
3883 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3885 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3886 /* Note: exit _without_ running nfs4_locku_done */
3887 task
->tk_action
= NULL
;
3890 calldata
->timestamp
= jiffies
;
3891 if (nfs4_setup_sequence(calldata
->server
->nfs_client
,
3892 &calldata
->arg
.seq_args
,
3893 &calldata
->res
.seq_res
, 1, task
))
3895 rpc_call_start(task
);
3898 static const struct rpc_call_ops nfs4_locku_ops
= {
3899 .rpc_call_prepare
= nfs4_locku_prepare
,
3900 .rpc_call_done
= nfs4_locku_done
,
3901 .rpc_release
= nfs4_locku_release_calldata
,
3904 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3905 struct nfs_open_context
*ctx
,
3906 struct nfs4_lock_state
*lsp
,
3907 struct nfs_seqid
*seqid
)
3909 struct nfs4_unlockdata
*data
;
3910 struct rpc_message msg
= {
3911 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3912 .rpc_cred
= ctx
->cred
,
3914 struct rpc_task_setup task_setup_data
= {
3915 .rpc_client
= NFS_CLIENT(lsp
->ls_state
->inode
),
3916 .rpc_message
= &msg
,
3917 .callback_ops
= &nfs4_locku_ops
,
3918 .workqueue
= nfsiod_workqueue
,
3919 .flags
= RPC_TASK_ASYNC
,
3922 /* Ensure this is an unlock - when canceling a lock, the
3923 * canceled lock is passed in, and it won't be an unlock.
3925 fl
->fl_type
= F_UNLCK
;
3927 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3929 nfs_free_seqid(seqid
);
3930 return ERR_PTR(-ENOMEM
);
3933 msg
.rpc_argp
= &data
->arg
,
3934 msg
.rpc_resp
= &data
->res
,
3935 task_setup_data
.callback_data
= data
;
3936 return rpc_run_task(&task_setup_data
);
3939 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3941 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3942 struct nfs_seqid
*seqid
;
3943 struct nfs4_lock_state
*lsp
;
3944 struct rpc_task
*task
;
3946 unsigned char fl_flags
= request
->fl_flags
;
3948 status
= nfs4_set_lock_state(state
, request
);
3949 /* Unlock _before_ we do the RPC call */
3950 request
->fl_flags
|= FL_EXISTS
;
3951 down_read(&nfsi
->rwsem
);
3952 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
) {
3953 up_read(&nfsi
->rwsem
);
3956 up_read(&nfsi
->rwsem
);
3959 /* Is this a delegated lock? */
3960 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3962 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3963 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3967 task
= nfs4_do_unlck(request
, nfs_file_open_context(request
->fl_file
), lsp
, seqid
);
3968 status
= PTR_ERR(task
);
3971 status
= nfs4_wait_for_completion_rpc_task(task
);
3974 request
->fl_flags
= fl_flags
;
3978 struct nfs4_lockdata
{
3979 struct nfs_lock_args arg
;
3980 struct nfs_lock_res res
;
3981 struct nfs4_lock_state
*lsp
;
3982 struct nfs_open_context
*ctx
;
3983 struct file_lock fl
;
3984 unsigned long timestamp
;
3987 struct nfs_server
*server
;
3990 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
3991 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
3993 struct nfs4_lockdata
*p
;
3994 struct inode
*inode
= lsp
->ls_state
->inode
;
3995 struct nfs_server
*server
= NFS_SERVER(inode
);
3997 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
4001 p
->arg
.fh
= NFS_FH(inode
);
4003 p
->arg
.open_seqid
= nfs_alloc_seqid(&lsp
->ls_state
->owner
->so_seqid
);
4004 if (p
->arg
.open_seqid
== NULL
)
4006 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
4007 if (p
->arg
.lock_seqid
== NULL
)
4008 goto out_free_seqid
;
4009 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
4010 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
4011 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
4012 p
->res
.lock_seqid
= p
->arg
.lock_seqid
;
4013 p
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
4016 atomic_inc(&lsp
->ls_count
);
4017 p
->ctx
= get_nfs_open_context(ctx
);
4018 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
4021 nfs_free_seqid(p
->arg
.open_seqid
);
4027 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
4029 struct nfs4_lockdata
*data
= calldata
;
4030 struct nfs4_state
*state
= data
->lsp
->ls_state
;
4032 dprintk("%s: begin!\n", __func__
);
4033 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
4035 /* Do we need to do an open_to_lock_owner? */
4036 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
4037 if (nfs_wait_on_sequence(data
->arg
.open_seqid
, task
) != 0)
4039 data
->arg
.open_stateid
= &state
->stateid
;
4040 data
->arg
.new_lock_owner
= 1;
4041 data
->res
.open_seqid
= data
->arg
.open_seqid
;
4043 data
->arg
.new_lock_owner
= 0;
4044 data
->timestamp
= jiffies
;
4045 if (nfs4_setup_sequence(data
->server
->nfs_client
, &data
->arg
.seq_args
,
4046 &data
->res
.seq_res
, 1, task
))
4048 rpc_call_start(task
);
4049 dprintk("%s: done!, ret = %d\n", __func__
, data
->rpc_status
);
4052 static void nfs4_recover_lock_prepare(struct rpc_task
*task
, void *calldata
)
4054 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
4055 nfs4_lock_prepare(task
, calldata
);
4058 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
4060 struct nfs4_lockdata
*data
= calldata
;
4062 dprintk("%s: begin!\n", __func__
);
4064 nfs4_sequence_done(data
->server
, &data
->res
.seq_res
,
4067 data
->rpc_status
= task
->tk_status
;
4068 if (RPC_ASSASSINATED(task
))
4070 if (data
->arg
.new_lock_owner
!= 0) {
4071 if (data
->rpc_status
== 0)
4072 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
4076 if (data
->rpc_status
== 0) {
4077 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
4078 sizeof(data
->lsp
->ls_stateid
.data
));
4079 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
4080 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
4083 dprintk("%s: done, ret = %d!\n", __func__
, data
->rpc_status
);
4086 static void nfs4_lock_release(void *calldata
)
4088 struct nfs4_lockdata
*data
= calldata
;
4090 dprintk("%s: begin!\n", __func__
);
4091 nfs_free_seqid(data
->arg
.open_seqid
);
4092 if (data
->cancelled
!= 0) {
4093 struct rpc_task
*task
;
4094 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
4095 data
->arg
.lock_seqid
);
4098 dprintk("%s: cancelling lock!\n", __func__
);
4100 nfs_free_seqid(data
->arg
.lock_seqid
);
4101 nfs4_put_lock_state(data
->lsp
);
4102 put_nfs_open_context(data
->ctx
);
4104 dprintk("%s: done!\n", __func__
);
4107 static const struct rpc_call_ops nfs4_lock_ops
= {
4108 .rpc_call_prepare
= nfs4_lock_prepare
,
4109 .rpc_call_done
= nfs4_lock_done
,
4110 .rpc_release
= nfs4_lock_release
,
4113 static const struct rpc_call_ops nfs4_recover_lock_ops
= {
4114 .rpc_call_prepare
= nfs4_recover_lock_prepare
,
4115 .rpc_call_done
= nfs4_lock_done
,
4116 .rpc_release
= nfs4_lock_release
,
4119 static void nfs4_handle_setlk_error(struct nfs_server
*server
, struct nfs4_lock_state
*lsp
, int new_lock_owner
, int error
)
4121 struct nfs_client
*clp
= server
->nfs_client
;
4122 struct nfs4_state
*state
= lsp
->ls_state
;
4125 case -NFS4ERR_ADMIN_REVOKED
:
4126 case -NFS4ERR_BAD_STATEID
:
4127 case -NFS4ERR_EXPIRED
:
4128 if (new_lock_owner
!= 0 ||
4129 (lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) != 0)
4130 nfs4_state_mark_reclaim_nograce(clp
, state
);
4131 lsp
->ls_seqid
.flags
&= ~NFS_SEQID_CONFIRMED
;
4133 case -NFS4ERR_STALE_STATEID
:
4134 if (new_lock_owner
!= 0 ||
4135 (lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) != 0)
4136 nfs4_state_mark_reclaim_reboot(clp
, state
);
4137 lsp
->ls_seqid
.flags
&= ~NFS_SEQID_CONFIRMED
;
4141 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int recovery_type
)
4143 struct nfs4_lockdata
*data
;
4144 struct rpc_task
*task
;
4145 struct rpc_message msg
= {
4146 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
4147 .rpc_cred
= state
->owner
->so_cred
,
4149 struct rpc_task_setup task_setup_data
= {
4150 .rpc_client
= NFS_CLIENT(state
->inode
),
4151 .rpc_message
= &msg
,
4152 .callback_ops
= &nfs4_lock_ops
,
4153 .workqueue
= nfsiod_workqueue
,
4154 .flags
= RPC_TASK_ASYNC
,
4158 dprintk("%s: begin!\n", __func__
);
4159 data
= nfs4_alloc_lockdata(fl
, nfs_file_open_context(fl
->fl_file
),
4160 fl
->fl_u
.nfs4_fl
.owner
);
4164 data
->arg
.block
= 1;
4165 if (recovery_type
> NFS_LOCK_NEW
) {
4166 if (recovery_type
== NFS_LOCK_RECLAIM
)
4167 data
->arg
.reclaim
= NFS_LOCK_RECLAIM
;
4168 task_setup_data
.callback_ops
= &nfs4_recover_lock_ops
;
4170 msg
.rpc_argp
= &data
->arg
,
4171 msg
.rpc_resp
= &data
->res
,
4172 task_setup_data
.callback_data
= data
;
4173 task
= rpc_run_task(&task_setup_data
);
4175 return PTR_ERR(task
);
4176 ret
= nfs4_wait_for_completion_rpc_task(task
);
4178 ret
= data
->rpc_status
;
4180 nfs4_handle_setlk_error(data
->server
, data
->lsp
,
4181 data
->arg
.new_lock_owner
, ret
);
4183 data
->cancelled
= 1;
4185 dprintk("%s: done, ret = %d!\n", __func__
, ret
);
4189 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
4191 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4192 struct nfs4_exception exception
= { };
4196 /* Cache the lock if possible... */
4197 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
4199 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, NFS_LOCK_RECLAIM
);
4200 if (err
!= -NFS4ERR_DELAY
&& err
!= -EKEYEXPIRED
)
4202 nfs4_handle_exception(server
, err
, &exception
);
4203 } while (exception
.retry
);
4207 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
4209 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4210 struct nfs4_exception exception
= { };
4213 err
= nfs4_set_lock_state(state
, request
);
4217 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
4219 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, NFS_LOCK_EXPIRED
);
4223 case -NFS4ERR_GRACE
:
4224 case -NFS4ERR_DELAY
:
4226 nfs4_handle_exception(server
, err
, &exception
);
4229 } while (exception
.retry
);
4234 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4236 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
4237 unsigned char fl_flags
= request
->fl_flags
;
4238 int status
= -ENOLCK
;
4240 if ((fl_flags
& FL_POSIX
) &&
4241 !test_bit(NFS_STATE_POSIX_LOCKS
, &state
->flags
))
4243 /* Is this a delegated open? */
4244 status
= nfs4_set_lock_state(state
, request
);
4247 request
->fl_flags
|= FL_ACCESS
;
4248 status
= do_vfs_lock(request
->fl_file
, request
);
4251 down_read(&nfsi
->rwsem
);
4252 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
4253 /* Yes: cache locks! */
4254 /* ...but avoid races with delegation recall... */
4255 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
4256 status
= do_vfs_lock(request
->fl_file
, request
);
4259 status
= _nfs4_do_setlk(state
, cmd
, request
, NFS_LOCK_NEW
);
4262 /* Note: we always want to sleep here! */
4263 request
->fl_flags
= fl_flags
| FL_SLEEP
;
4264 if (do_vfs_lock(request
->fl_file
, request
) < 0)
4265 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __func__
);
4267 up_read(&nfsi
->rwsem
);
4269 request
->fl_flags
= fl_flags
;
4273 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4275 struct nfs4_exception exception
= { };
4279 err
= _nfs4_proc_setlk(state
, cmd
, request
);
4280 if (err
== -NFS4ERR_DENIED
)
4282 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
4284 } while (exception
.retry
);
4289 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
4291 struct nfs_open_context
*ctx
;
4292 struct nfs4_state
*state
;
4293 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
4296 /* verify open state */
4297 ctx
= nfs_file_open_context(filp
);
4300 if (request
->fl_start
< 0 || request
->fl_end
< 0)
4303 if (IS_GETLK(cmd
)) {
4305 return nfs4_proc_getlk(state
, F_GETLK
, request
);
4309 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
4312 if (request
->fl_type
== F_UNLCK
) {
4314 return nfs4_proc_unlck(state
, cmd
, request
);
4321 status
= nfs4_proc_setlk(state
, cmd
, request
);
4322 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
4324 timeout
= nfs4_set_lock_task_retry(timeout
);
4325 status
= -ERESTARTSYS
;
4328 } while(status
< 0);
4332 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
4334 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4335 struct nfs4_exception exception
= { };
4338 err
= nfs4_set_lock_state(state
, fl
);
4342 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, NFS_LOCK_NEW
);
4345 printk(KERN_ERR
"%s: unhandled error %d.\n",
4350 case -NFS4ERR_EXPIRED
:
4351 case -NFS4ERR_STALE_CLIENTID
:
4352 case -NFS4ERR_STALE_STATEID
:
4353 case -NFS4ERR_BADSESSION
:
4354 case -NFS4ERR_BADSLOT
:
4355 case -NFS4ERR_BAD_HIGH_SLOT
:
4356 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
4357 case -NFS4ERR_DEADSESSION
:
4358 nfs4_schedule_state_recovery(server
->nfs_client
);
4362 * The show must go on: exit, but mark the
4363 * stateid as needing recovery.
4365 case -NFS4ERR_ADMIN_REVOKED
:
4366 case -NFS4ERR_BAD_STATEID
:
4367 case -NFS4ERR_OPENMODE
:
4368 nfs4_state_mark_reclaim_nograce(server
->nfs_client
, state
);
4372 case -NFS4ERR_DENIED
:
4373 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4376 case -NFS4ERR_DELAY
:
4380 err
= nfs4_handle_exception(server
, err
, &exception
);
4381 } while (exception
.retry
);
4386 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4388 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
4389 size_t buflen
, int flags
)
4391 struct inode
*inode
= dentry
->d_inode
;
4393 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
4396 return nfs4_proc_set_acl(inode
, buf
, buflen
);
4399 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4400 * and that's what we'll do for e.g. user attributes that haven't been set.
4401 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4402 * attributes in kernel-managed attribute namespaces. */
4403 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
4406 struct inode
*inode
= dentry
->d_inode
;
4408 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
4411 return nfs4_proc_get_acl(inode
, buf
, buflen
);
4414 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
4416 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
4418 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
4420 if (buf
&& buflen
< len
)
4423 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
4427 static void nfs_fixup_referral_attributes(struct nfs_fattr
*fattr
)
4429 if (!((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) &&
4430 (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
4431 (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)))
4434 fattr
->valid
|= NFS_ATTR_FATTR_TYPE
| NFS_ATTR_FATTR_MODE
|
4435 NFS_ATTR_FATTR_NLINK
;
4436 fattr
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
4440 int nfs4_proc_fs_locations(struct inode
*dir
, const struct qstr
*name
,
4441 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
4443 struct nfs_server
*server
= NFS_SERVER(dir
);
4445 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
4446 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
4448 struct nfs4_fs_locations_arg args
= {
4449 .dir_fh
= NFS_FH(dir
),
4454 struct nfs4_fs_locations_res res
= {
4455 .fs_locations
= fs_locations
,
4457 struct rpc_message msg
= {
4458 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
4464 dprintk("%s: start\n", __func__
);
4465 nfs_fattr_init(&fs_locations
->fattr
);
4466 fs_locations
->server
= server
;
4467 fs_locations
->nlocations
= 0;
4468 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
4469 nfs_fixup_referral_attributes(&fs_locations
->fattr
);
4470 dprintk("%s: returned status = %d\n", __func__
, status
);
4474 #ifdef CONFIG_NFS_V4_1
4476 * nfs4_proc_exchange_id()
4478 * Since the clientid has expired, all compounds using sessions
4479 * associated with the stale clientid will be returning
4480 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4481 * be in some phase of session reset.
4483 int nfs4_proc_exchange_id(struct nfs_client
*clp
, struct rpc_cred
*cred
)
4485 nfs4_verifier verifier
;
4486 struct nfs41_exchange_id_args args
= {
4488 .flags
= clp
->cl_exchange_flags
,
4490 struct nfs41_exchange_id_res res
= {
4494 struct rpc_message msg
= {
4495 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_EXCHANGE_ID
],
4502 dprintk("--> %s\n", __func__
);
4503 BUG_ON(clp
== NULL
);
4505 /* Remove server-only flags */
4506 args
.flags
&= ~EXCHGID4_FLAG_CONFIRMED_R
;
4508 p
= (u32
*)verifier
.data
;
4509 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
4510 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
4511 args
.verifier
= &verifier
;
4514 args
.id_len
= scnprintf(args
.id
, sizeof(args
.id
),
4517 rpc_peeraddr2str(clp
->cl_rpcclient
,
4519 clp
->cl_id_uniquifier
);
4521 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
4523 if (status
!= -NFS4ERR_CLID_INUSE
)
4529 if (++clp
->cl_id_uniquifier
== 0)
4533 dprintk("<-- %s status= %d\n", __func__
, status
);
4537 struct nfs4_get_lease_time_data
{
4538 struct nfs4_get_lease_time_args
*args
;
4539 struct nfs4_get_lease_time_res
*res
;
4540 struct nfs_client
*clp
;
4543 static void nfs4_get_lease_time_prepare(struct rpc_task
*task
,
4547 struct nfs4_get_lease_time_data
*data
=
4548 (struct nfs4_get_lease_time_data
*)calldata
;
4550 dprintk("--> %s\n", __func__
);
4551 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
4552 /* just setup sequence, do not trigger session recovery
4553 since we're invoked within one */
4554 ret
= nfs41_setup_sequence(data
->clp
->cl_session
,
4555 &data
->args
->la_seq_args
,
4556 &data
->res
->lr_seq_res
, 0, task
);
4558 BUG_ON(ret
== -EAGAIN
);
4559 rpc_call_start(task
);
4560 dprintk("<-- %s\n", __func__
);
4564 * Called from nfs4_state_manager thread for session setup, so don't recover
4565 * from sequence operation or clientid errors.
4567 static void nfs4_get_lease_time_done(struct rpc_task
*task
, void *calldata
)
4569 struct nfs4_get_lease_time_data
*data
=
4570 (struct nfs4_get_lease_time_data
*)calldata
;
4572 dprintk("--> %s\n", __func__
);
4573 nfs41_sequence_done(data
->clp
, &data
->res
->lr_seq_res
, task
->tk_status
);
4574 switch (task
->tk_status
) {
4575 case -NFS4ERR_DELAY
:
4576 case -NFS4ERR_GRACE
:
4578 dprintk("%s Retry: tk_status %d\n", __func__
, task
->tk_status
);
4579 rpc_delay(task
, NFS4_POLL_RETRY_MIN
);
4580 task
->tk_status
= 0;
4581 nfs_restart_rpc(task
, data
->clp
);
4584 dprintk("<-- %s\n", __func__
);
4587 struct rpc_call_ops nfs4_get_lease_time_ops
= {
4588 .rpc_call_prepare
= nfs4_get_lease_time_prepare
,
4589 .rpc_call_done
= nfs4_get_lease_time_done
,
4592 int nfs4_proc_get_lease_time(struct nfs_client
*clp
, struct nfs_fsinfo
*fsinfo
)
4594 struct rpc_task
*task
;
4595 struct nfs4_get_lease_time_args args
;
4596 struct nfs4_get_lease_time_res res
= {
4597 .lr_fsinfo
= fsinfo
,
4599 struct nfs4_get_lease_time_data data
= {
4604 struct rpc_message msg
= {
4605 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GET_LEASE_TIME
],
4609 struct rpc_task_setup task_setup
= {
4610 .rpc_client
= clp
->cl_rpcclient
,
4611 .rpc_message
= &msg
,
4612 .callback_ops
= &nfs4_get_lease_time_ops
,
4613 .callback_data
= &data
4617 res
.lr_seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
4618 dprintk("--> %s\n", __func__
);
4619 task
= rpc_run_task(&task_setup
);
4622 status
= PTR_ERR(task
);
4624 status
= task
->tk_status
;
4627 dprintk("<-- %s return %d\n", __func__
, status
);
4633 * Reset a slot table
4635 static int nfs4_reset_slot_table(struct nfs4_slot_table
*tbl
, u32 max_reqs
,
4638 struct nfs4_slot
*new = NULL
;
4642 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__
,
4643 max_reqs
, tbl
->max_slots
);
4645 /* Does the newly negotiated max_reqs match the existing slot table? */
4646 if (max_reqs
!= tbl
->max_slots
) {
4648 new = kmalloc(max_reqs
* sizeof(struct nfs4_slot
),
4655 spin_lock(&tbl
->slot_tbl_lock
);
4658 tbl
->max_slots
= max_reqs
;
4660 for (i
= 0; i
< tbl
->max_slots
; ++i
)
4661 tbl
->slots
[i
].seq_nr
= ivalue
;
4662 spin_unlock(&tbl
->slot_tbl_lock
);
4663 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__
,
4664 tbl
, tbl
->slots
, tbl
->max_slots
);
4666 dprintk("<-- %s: return %d\n", __func__
, ret
);
4671 * Reset the forechannel and backchannel slot tables
4673 static int nfs4_reset_slot_tables(struct nfs4_session
*session
)
4677 status
= nfs4_reset_slot_table(&session
->fc_slot_table
,
4678 session
->fc_attrs
.max_reqs
, 1);
4682 status
= nfs4_reset_slot_table(&session
->bc_slot_table
,
4683 session
->bc_attrs
.max_reqs
, 0);
4687 /* Destroy the slot table */
4688 static void nfs4_destroy_slot_tables(struct nfs4_session
*session
)
4690 if (session
->fc_slot_table
.slots
!= NULL
) {
4691 kfree(session
->fc_slot_table
.slots
);
4692 session
->fc_slot_table
.slots
= NULL
;
4694 if (session
->bc_slot_table
.slots
!= NULL
) {
4695 kfree(session
->bc_slot_table
.slots
);
4696 session
->bc_slot_table
.slots
= NULL
;
4702 * Initialize slot table
4704 static int nfs4_init_slot_table(struct nfs4_slot_table
*tbl
,
4705 int max_slots
, int ivalue
)
4707 struct nfs4_slot
*slot
;
4710 BUG_ON(max_slots
> NFS4_MAX_SLOT_TABLE
);
4712 dprintk("--> %s: max_reqs=%u\n", __func__
, max_slots
);
4714 slot
= kcalloc(max_slots
, sizeof(struct nfs4_slot
), GFP_KERNEL
);
4719 spin_lock(&tbl
->slot_tbl_lock
);
4720 tbl
->max_slots
= max_slots
;
4722 tbl
->highest_used_slotid
= -1; /* no slot is currently used */
4723 spin_unlock(&tbl
->slot_tbl_lock
);
4724 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__
,
4725 tbl
, tbl
->slots
, tbl
->max_slots
);
4727 dprintk("<-- %s: return %d\n", __func__
, ret
);
4732 * Initialize the forechannel and backchannel tables
4734 static int nfs4_init_slot_tables(struct nfs4_session
*session
)
4736 struct nfs4_slot_table
*tbl
;
4739 tbl
= &session
->fc_slot_table
;
4740 if (tbl
->slots
== NULL
) {
4741 status
= nfs4_init_slot_table(tbl
,
4742 session
->fc_attrs
.max_reqs
, 1);
4747 tbl
= &session
->bc_slot_table
;
4748 if (tbl
->slots
== NULL
) {
4749 status
= nfs4_init_slot_table(tbl
,
4750 session
->bc_attrs
.max_reqs
, 0);
4752 nfs4_destroy_slot_tables(session
);
4758 struct nfs4_session
*nfs4_alloc_session(struct nfs_client
*clp
)
4760 struct nfs4_session
*session
;
4761 struct nfs4_slot_table
*tbl
;
4763 session
= kzalloc(sizeof(struct nfs4_session
), GFP_KERNEL
);
4768 * The create session reply races with the server back
4769 * channel probe. Mark the client NFS_CS_SESSION_INITING
4770 * so that the client back channel can find the
4773 clp
->cl_cons_state
= NFS_CS_SESSION_INITING
;
4774 init_completion(&session
->complete
);
4776 tbl
= &session
->fc_slot_table
;
4777 tbl
->highest_used_slotid
= -1;
4778 spin_lock_init(&tbl
->slot_tbl_lock
);
4779 rpc_init_priority_wait_queue(&tbl
->slot_tbl_waitq
, "ForeChannel Slot table");
4781 tbl
= &session
->bc_slot_table
;
4782 tbl
->highest_used_slotid
= -1;
4783 spin_lock_init(&tbl
->slot_tbl_lock
);
4784 rpc_init_wait_queue(&tbl
->slot_tbl_waitq
, "BackChannel Slot table");
4790 void nfs4_destroy_session(struct nfs4_session
*session
)
4792 nfs4_proc_destroy_session(session
);
4793 dprintk("%s Destroy backchannel for xprt %p\n",
4794 __func__
, session
->clp
->cl_rpcclient
->cl_xprt
);
4795 xprt_destroy_backchannel(session
->clp
->cl_rpcclient
->cl_xprt
,
4796 NFS41_BC_MIN_CALLBACKS
);
4797 nfs4_destroy_slot_tables(session
);
4802 * Initialize the values to be used by the client in CREATE_SESSION
4803 * If nfs4_init_session set the fore channel request and response sizes,
4806 * Set the back channel max_resp_sz_cached to zero to force the client to
4807 * always set csa_cachethis to FALSE because the current implementation
4808 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4810 static void nfs4_init_channel_attrs(struct nfs41_create_session_args
*args
)
4812 struct nfs4_session
*session
= args
->client
->cl_session
;
4813 unsigned int mxrqst_sz
= session
->fc_attrs
.max_rqst_sz
,
4814 mxresp_sz
= session
->fc_attrs
.max_resp_sz
;
4817 mxrqst_sz
= NFS_MAX_FILE_IO_SIZE
;
4819 mxresp_sz
= NFS_MAX_FILE_IO_SIZE
;
4820 /* Fore channel attributes */
4821 args
->fc_attrs
.headerpadsz
= 0;
4822 args
->fc_attrs
.max_rqst_sz
= mxrqst_sz
;
4823 args
->fc_attrs
.max_resp_sz
= mxresp_sz
;
4824 args
->fc_attrs
.max_ops
= NFS4_MAX_OPS
;
4825 args
->fc_attrs
.max_reqs
= session
->clp
->cl_rpcclient
->cl_xprt
->max_reqs
;
4827 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4828 "max_ops=%u max_reqs=%u\n",
4830 args
->fc_attrs
.max_rqst_sz
, args
->fc_attrs
.max_resp_sz
,
4831 args
->fc_attrs
.max_ops
, args
->fc_attrs
.max_reqs
);
4833 /* Back channel attributes */
4834 args
->bc_attrs
.headerpadsz
= 0;
4835 args
->bc_attrs
.max_rqst_sz
= PAGE_SIZE
;
4836 args
->bc_attrs
.max_resp_sz
= PAGE_SIZE
;
4837 args
->bc_attrs
.max_resp_sz_cached
= 0;
4838 args
->bc_attrs
.max_ops
= NFS4_MAX_BACK_CHANNEL_OPS
;
4839 args
->bc_attrs
.max_reqs
= 1;
4841 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4842 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4844 args
->bc_attrs
.max_rqst_sz
, args
->bc_attrs
.max_resp_sz
,
4845 args
->bc_attrs
.max_resp_sz_cached
, args
->bc_attrs
.max_ops
,
4846 args
->bc_attrs
.max_reqs
);
4849 static int _verify_channel_attr(char *chan
, char *attr_name
, u32 sent
, u32 rcvd
)
4853 printk(KERN_WARNING
"%s: Session INVALID: %s channel %s increased. "
4854 "sent=%u rcvd=%u\n", __func__
, chan
, attr_name
, sent
, rcvd
);
4858 #define _verify_fore_channel_attr(_name_) \
4859 _verify_channel_attr("fore", #_name_, \
4860 args->fc_attrs._name_, \
4861 session->fc_attrs._name_)
4863 #define _verify_back_channel_attr(_name_) \
4864 _verify_channel_attr("back", #_name_, \
4865 args->bc_attrs._name_, \
4866 session->bc_attrs._name_)
4869 * The server is not allowed to increase the fore channel header pad size,
4870 * maximum response size, or maximum number of operations.
4872 * The back channel attributes are only negotiatied down: We send what the
4873 * (back channel) server insists upon.
4875 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args
*args
,
4876 struct nfs4_session
*session
)
4880 ret
|= _verify_fore_channel_attr(headerpadsz
);
4881 ret
|= _verify_fore_channel_attr(max_resp_sz
);
4882 ret
|= _verify_fore_channel_attr(max_ops
);
4884 ret
|= _verify_back_channel_attr(headerpadsz
);
4885 ret
|= _verify_back_channel_attr(max_rqst_sz
);
4886 ret
|= _verify_back_channel_attr(max_resp_sz
);
4887 ret
|= _verify_back_channel_attr(max_resp_sz_cached
);
4888 ret
|= _verify_back_channel_attr(max_ops
);
4889 ret
|= _verify_back_channel_attr(max_reqs
);
4894 static int _nfs4_proc_create_session(struct nfs_client
*clp
)
4896 struct nfs4_session
*session
= clp
->cl_session
;
4897 struct nfs41_create_session_args args
= {
4899 .cb_program
= NFS4_CALLBACK
,
4901 struct nfs41_create_session_res res
= {
4904 struct rpc_message msg
= {
4905 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE_SESSION
],
4911 nfs4_init_channel_attrs(&args
);
4912 args
.flags
= (SESSION4_PERSIST
| SESSION4_BACK_CHAN
);
4914 status
= rpc_call_sync(session
->clp
->cl_rpcclient
, &msg
, 0);
4917 /* Verify the session's negotiated channel_attrs values */
4918 status
= nfs4_verify_channel_attrs(&args
, session
);
4920 /* Increment the clientid slot sequence id */
4928 * Issues a CREATE_SESSION operation to the server.
4929 * It is the responsibility of the caller to verify the session is
4930 * expired before calling this routine.
4932 int nfs4_proc_create_session(struct nfs_client
*clp
)
4936 struct nfs4_session
*session
= clp
->cl_session
;
4938 dprintk("--> %s clp=%p session=%p\n", __func__
, clp
, session
);
4940 status
= _nfs4_proc_create_session(clp
);
4944 /* Init and reset the fore channel */
4945 status
= nfs4_init_slot_tables(session
);
4946 dprintk("slot table initialization returned %d\n", status
);
4949 status
= nfs4_reset_slot_tables(session
);
4950 dprintk("slot table reset returned %d\n", status
);
4954 ptr
= (unsigned *)&session
->sess_id
.data
[0];
4955 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__
,
4956 clp
->cl_seqid
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
4958 dprintk("<-- %s\n", __func__
);
4963 * Issue the over-the-wire RPC DESTROY_SESSION.
4964 * The caller must serialize access to this routine.
4966 int nfs4_proc_destroy_session(struct nfs4_session
*session
)
4969 struct rpc_message msg
;
4971 dprintk("--> nfs4_proc_destroy_session\n");
4973 /* session is still being setup */
4974 if (session
->clp
->cl_cons_state
!= NFS_CS_READY
)
4977 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DESTROY_SESSION
];
4978 msg
.rpc_argp
= session
;
4979 msg
.rpc_resp
= NULL
;
4980 msg
.rpc_cred
= NULL
;
4981 status
= rpc_call_sync(session
->clp
->cl_rpcclient
, &msg
, 0);
4985 "Got error %d from the server on DESTROY_SESSION. "
4986 "Session has been destroyed regardless...\n", status
);
4988 dprintk("<-- nfs4_proc_destroy_session\n");
4992 int nfs4_init_session(struct nfs_server
*server
)
4994 struct nfs_client
*clp
= server
->nfs_client
;
4995 struct nfs4_session
*session
;
4996 unsigned int rsize
, wsize
;
4999 if (!nfs4_has_session(clp
))
5002 rsize
= server
->rsize
;
5004 rsize
= NFS_MAX_FILE_IO_SIZE
;
5005 wsize
= server
->wsize
;
5007 wsize
= NFS_MAX_FILE_IO_SIZE
;
5009 session
= clp
->cl_session
;
5010 session
->fc_attrs
.max_rqst_sz
= wsize
+ nfs41_maxwrite_overhead
;
5011 session
->fc_attrs
.max_resp_sz
= rsize
+ nfs41_maxread_overhead
;
5013 ret
= nfs4_recover_expired_lease(server
);
5015 ret
= nfs4_check_client_ready(clp
);
5020 * Renew the cl_session lease.
5022 static int nfs4_proc_sequence(struct nfs_client
*clp
, struct rpc_cred
*cred
)
5024 struct nfs4_sequence_args args
;
5025 struct nfs4_sequence_res res
;
5027 struct rpc_message msg
= {
5028 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SEQUENCE
],
5034 args
.sa_cache_this
= 0;
5036 return nfs4_call_sync_sequence(clp
, clp
->cl_rpcclient
, &msg
, &args
,
5037 &res
, args
.sa_cache_this
, 1);
5040 static void nfs41_sequence_release(void *data
)
5042 struct nfs_client
*clp
= (struct nfs_client
*)data
;
5044 if (atomic_read(&clp
->cl_count
) > 1)
5045 nfs4_schedule_state_renewal(clp
);
5046 nfs_put_client(clp
);
5049 static void nfs41_sequence_call_done(struct rpc_task
*task
, void *data
)
5051 struct nfs_client
*clp
= (struct nfs_client
*)data
;
5053 nfs41_sequence_done(clp
, task
->tk_msg
.rpc_resp
, task
->tk_status
);
5055 if (task
->tk_status
< 0) {
5056 dprintk("%s ERROR %d\n", __func__
, task
->tk_status
);
5057 if (atomic_read(&clp
->cl_count
) == 1)
5060 if (_nfs4_async_handle_error(task
, NULL
, clp
, NULL
)
5062 nfs_restart_rpc(task
, clp
);
5066 dprintk("%s rpc_cred %p\n", __func__
, task
->tk_msg
.rpc_cred
);
5068 kfree(task
->tk_msg
.rpc_argp
);
5069 kfree(task
->tk_msg
.rpc_resp
);
5071 dprintk("<-- %s\n", __func__
);
5074 static void nfs41_sequence_prepare(struct rpc_task
*task
, void *data
)
5076 struct nfs_client
*clp
;
5077 struct nfs4_sequence_args
*args
;
5078 struct nfs4_sequence_res
*res
;
5080 clp
= (struct nfs_client
*)data
;
5081 args
= task
->tk_msg
.rpc_argp
;
5082 res
= task
->tk_msg
.rpc_resp
;
5084 if (nfs4_setup_sequence(clp
, args
, res
, 0, task
))
5086 rpc_call_start(task
);
5089 static const struct rpc_call_ops nfs41_sequence_ops
= {
5090 .rpc_call_done
= nfs41_sequence_call_done
,
5091 .rpc_call_prepare
= nfs41_sequence_prepare
,
5092 .rpc_release
= nfs41_sequence_release
,
5095 static int nfs41_proc_async_sequence(struct nfs_client
*clp
,
5096 struct rpc_cred
*cred
)
5098 struct nfs4_sequence_args
*args
;
5099 struct nfs4_sequence_res
*res
;
5100 struct rpc_message msg
= {
5101 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SEQUENCE
],
5105 if (!atomic_inc_not_zero(&clp
->cl_count
))
5107 args
= kzalloc(sizeof(*args
), GFP_KERNEL
);
5108 res
= kzalloc(sizeof(*res
), GFP_KERNEL
);
5109 if (!args
|| !res
) {
5112 nfs_put_client(clp
);
5115 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
5116 msg
.rpc_argp
= args
;
5119 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
5120 &nfs41_sequence_ops
, (void *)clp
);
5123 struct nfs4_reclaim_complete_data
{
5124 struct nfs_client
*clp
;
5125 struct nfs41_reclaim_complete_args arg
;
5126 struct nfs41_reclaim_complete_res res
;
5129 static void nfs4_reclaim_complete_prepare(struct rpc_task
*task
, void *data
)
5131 struct nfs4_reclaim_complete_data
*calldata
= data
;
5133 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
5134 if (nfs4_setup_sequence(calldata
->clp
, &calldata
->arg
.seq_args
,
5135 &calldata
->res
.seq_res
, 0, task
))
5138 rpc_call_start(task
);
5141 static void nfs4_reclaim_complete_done(struct rpc_task
*task
, void *data
)
5143 struct nfs4_reclaim_complete_data
*calldata
= data
;
5144 struct nfs_client
*clp
= calldata
->clp
;
5145 struct nfs4_sequence_res
*res
= &calldata
->res
.seq_res
;
5147 dprintk("--> %s\n", __func__
);
5148 nfs41_sequence_done(clp
, res
, task
->tk_status
);
5149 switch (task
->tk_status
) {
5151 case -NFS4ERR_COMPLETE_ALREADY
:
5153 case -NFS4ERR_BADSESSION
:
5154 case -NFS4ERR_DEADSESSION
:
5156 * Handle the session error, but do not retry the operation, as
5157 * we have no way of telling whether the clientid had to be
5158 * reset before we got our reply. If reset, a new wave of
5159 * reclaim operations will follow, containing their own reclaim
5160 * complete. We don't want our retry to get on the way of
5161 * recovery by incorrectly indicating to the server that we're
5162 * done reclaiming state since the process had to be restarted.
5164 _nfs4_async_handle_error(task
, NULL
, clp
, NULL
);
5167 if (_nfs4_async_handle_error(
5168 task
, NULL
, clp
, NULL
) == -EAGAIN
) {
5169 rpc_restart_call_prepare(task
);
5174 dprintk("<-- %s\n", __func__
);
5177 static void nfs4_free_reclaim_complete_data(void *data
)
5179 struct nfs4_reclaim_complete_data
*calldata
= data
;
5184 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops
= {
5185 .rpc_call_prepare
= nfs4_reclaim_complete_prepare
,
5186 .rpc_call_done
= nfs4_reclaim_complete_done
,
5187 .rpc_release
= nfs4_free_reclaim_complete_data
,
5191 * Issue a global reclaim complete.
5193 static int nfs41_proc_reclaim_complete(struct nfs_client
*clp
)
5195 struct nfs4_reclaim_complete_data
*calldata
;
5196 struct rpc_task
*task
;
5197 struct rpc_message msg
= {
5198 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RECLAIM_COMPLETE
],
5200 struct rpc_task_setup task_setup_data
= {
5201 .rpc_client
= clp
->cl_rpcclient
,
5202 .rpc_message
= &msg
,
5203 .callback_ops
= &nfs4_reclaim_complete_call_ops
,
5204 .flags
= RPC_TASK_ASYNC
,
5206 int status
= -ENOMEM
;
5208 dprintk("--> %s\n", __func__
);
5209 calldata
= kzalloc(sizeof(*calldata
), GFP_KERNEL
);
5210 if (calldata
== NULL
)
5212 calldata
->clp
= clp
;
5213 calldata
->arg
.one_fs
= 0;
5214 calldata
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
5216 msg
.rpc_argp
= &calldata
->arg
;
5217 msg
.rpc_resp
= &calldata
->res
;
5218 task_setup_data
.callback_data
= calldata
;
5219 task
= rpc_run_task(&task_setup_data
);
5221 status
= PTR_ERR(task
);
5224 dprintk("<-- %s status=%d\n", __func__
, status
);
5227 #endif /* CONFIG_NFS_V4_1 */
5229 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops
= {
5230 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
5231 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
5232 .recover_open
= nfs4_open_reclaim
,
5233 .recover_lock
= nfs4_lock_reclaim
,
5234 .establish_clid
= nfs4_init_clientid
,
5235 .get_clid_cred
= nfs4_get_setclientid_cred
,
5238 #if defined(CONFIG_NFS_V4_1)
5239 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops
= {
5240 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
5241 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
5242 .recover_open
= nfs4_open_reclaim
,
5243 .recover_lock
= nfs4_lock_reclaim
,
5244 .establish_clid
= nfs41_init_clientid
,
5245 .get_clid_cred
= nfs4_get_exchange_id_cred
,
5246 .reclaim_complete
= nfs41_proc_reclaim_complete
,
5248 #endif /* CONFIG_NFS_V4_1 */
5250 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops
= {
5251 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
5252 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
5253 .recover_open
= nfs4_open_expired
,
5254 .recover_lock
= nfs4_lock_expired
,
5255 .establish_clid
= nfs4_init_clientid
,
5256 .get_clid_cred
= nfs4_get_setclientid_cred
,
5259 #if defined(CONFIG_NFS_V4_1)
5260 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops
= {
5261 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
5262 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
5263 .recover_open
= nfs4_open_expired
,
5264 .recover_lock
= nfs4_lock_expired
,
5265 .establish_clid
= nfs41_init_clientid
,
5266 .get_clid_cred
= nfs4_get_exchange_id_cred
,
5268 #endif /* CONFIG_NFS_V4_1 */
5270 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops
= {
5271 .sched_state_renewal
= nfs4_proc_async_renew
,
5272 .get_state_renewal_cred_locked
= nfs4_get_renew_cred_locked
,
5273 .renew_lease
= nfs4_proc_renew
,
5276 #if defined(CONFIG_NFS_V4_1)
5277 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops
= {
5278 .sched_state_renewal
= nfs41_proc_async_sequence
,
5279 .get_state_renewal_cred_locked
= nfs4_get_machine_cred_locked
,
5280 .renew_lease
= nfs4_proc_sequence
,
5285 * Per minor version reboot and network partition recovery ops
5288 struct nfs4_state_recovery_ops
*nfs4_reboot_recovery_ops
[] = {
5289 &nfs40_reboot_recovery_ops
,
5290 #if defined(CONFIG_NFS_V4_1)
5291 &nfs41_reboot_recovery_ops
,
5295 struct nfs4_state_recovery_ops
*nfs4_nograce_recovery_ops
[] = {
5296 &nfs40_nograce_recovery_ops
,
5297 #if defined(CONFIG_NFS_V4_1)
5298 &nfs41_nograce_recovery_ops
,
5302 struct nfs4_state_maintenance_ops
*nfs4_state_renewal_ops
[] = {
5303 &nfs40_state_renewal_ops
,
5304 #if defined(CONFIG_NFS_V4_1)
5305 &nfs41_state_renewal_ops
,
5309 static const struct inode_operations nfs4_file_inode_operations
= {
5310 .permission
= nfs_permission
,
5311 .getattr
= nfs_getattr
,
5312 .setattr
= nfs_setattr
,
5313 .getxattr
= nfs4_getxattr
,
5314 .setxattr
= nfs4_setxattr
,
5315 .listxattr
= nfs4_listxattr
,
5318 const struct nfs_rpc_ops nfs_v4_clientops
= {
5319 .version
= 4, /* protocol version */
5320 .dentry_ops
= &nfs4_dentry_operations
,
5321 .dir_inode_ops
= &nfs4_dir_inode_operations
,
5322 .file_inode_ops
= &nfs4_file_inode_operations
,
5323 .getroot
= nfs4_proc_get_root
,
5324 .getattr
= nfs4_proc_getattr
,
5325 .setattr
= nfs4_proc_setattr
,
5326 .lookupfh
= nfs4_proc_lookupfh
,
5327 .lookup
= nfs4_proc_lookup
,
5328 .access
= nfs4_proc_access
,
5329 .readlink
= nfs4_proc_readlink
,
5330 .create
= nfs4_proc_create
,
5331 .remove
= nfs4_proc_remove
,
5332 .unlink_setup
= nfs4_proc_unlink_setup
,
5333 .unlink_done
= nfs4_proc_unlink_done
,
5334 .rename
= nfs4_proc_rename
,
5335 .link
= nfs4_proc_link
,
5336 .symlink
= nfs4_proc_symlink
,
5337 .mkdir
= nfs4_proc_mkdir
,
5338 .rmdir
= nfs4_proc_remove
,
5339 .readdir
= nfs4_proc_readdir
,
5340 .mknod
= nfs4_proc_mknod
,
5341 .statfs
= nfs4_proc_statfs
,
5342 .fsinfo
= nfs4_proc_fsinfo
,
5343 .pathconf
= nfs4_proc_pathconf
,
5344 .set_capabilities
= nfs4_server_capabilities
,
5345 .decode_dirent
= nfs4_decode_dirent
,
5346 .read_setup
= nfs4_proc_read_setup
,
5347 .read_done
= nfs4_read_done
,
5348 .write_setup
= nfs4_proc_write_setup
,
5349 .write_done
= nfs4_write_done
,
5350 .commit_setup
= nfs4_proc_commit_setup
,
5351 .commit_done
= nfs4_commit_done
,
5352 .lock
= nfs4_proc_lock
,
5353 .clear_acl_cache
= nfs4_zap_acl_attr
,
5354 .close_context
= nfs4_close_context
,