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_LOCKTYPE_POSIX
) == 0)
1527 server
->caps
&= ~NFS_CAP_POSIX_LOCK
;
1528 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1529 status
= _nfs4_proc_open_confirm(data
);
1533 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
1534 _nfs4_proc_getattr(server
, &o_res
->fh
, o_res
->f_attr
);
1538 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
1540 struct nfs_client
*clp
= server
->nfs_client
;
1544 for (loop
= NFS4_MAX_LOOP_ON_RECOVER
; loop
!= 0; loop
--) {
1545 ret
= nfs4_wait_clnt_recover(clp
);
1548 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
1549 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
1551 nfs4_schedule_state_recovery(clp
);
1559 * reclaim state on the server after a network partition.
1560 * Assumes caller holds the appropriate lock
1562 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1564 struct nfs4_opendata
*opendata
;
1567 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1568 if (IS_ERR(opendata
))
1569 return PTR_ERR(opendata
);
1570 ret
= nfs4_open_recover(opendata
, state
);
1572 d_drop(ctx
->path
.dentry
);
1573 nfs4_opendata_put(opendata
);
1577 static int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1579 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1580 struct nfs4_exception exception
= { };
1584 err
= _nfs4_open_expired(ctx
, state
);
1588 case -NFS4ERR_GRACE
:
1589 case -NFS4ERR_DELAY
:
1591 nfs4_handle_exception(server
, err
, &exception
);
1594 } while (exception
.retry
);
1599 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1601 struct nfs_open_context
*ctx
;
1604 ctx
= nfs4_state_find_open_context(state
);
1606 return PTR_ERR(ctx
);
1607 ret
= nfs4_do_open_expired(ctx
, state
);
1608 put_nfs_open_context(ctx
);
1613 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1614 * fields corresponding to attributes that were used to store the verifier.
1615 * Make sure we clobber those fields in the later setattr call
1617 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1619 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1620 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1621 sattr
->ia_valid
|= ATTR_ATIME
;
1623 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1624 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1625 sattr
->ia_valid
|= ATTR_MTIME
;
1629 * Returns a referenced nfs4_state
1631 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
)
1633 struct nfs4_state_owner
*sp
;
1634 struct nfs4_state
*state
= NULL
;
1635 struct nfs_server
*server
= NFS_SERVER(dir
);
1636 struct nfs4_opendata
*opendata
;
1639 /* Protect against reboot recovery conflicts */
1641 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1642 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1645 status
= nfs4_recover_expired_lease(server
);
1647 goto err_put_state_owner
;
1648 if (path
->dentry
->d_inode
!= NULL
)
1649 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, fmode
);
1651 opendata
= nfs4_opendata_alloc(path
, sp
, fmode
, flags
, sattr
);
1652 if (opendata
== NULL
)
1653 goto err_put_state_owner
;
1655 if (path
->dentry
->d_inode
!= NULL
)
1656 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1658 status
= _nfs4_proc_open(opendata
);
1660 goto err_opendata_put
;
1662 if (opendata
->o_arg
.open_flags
& O_EXCL
)
1663 nfs4_exclusive_attrset(opendata
, sattr
);
1665 state
= nfs4_opendata_to_nfs4_state(opendata
);
1666 status
= PTR_ERR(state
);
1668 goto err_opendata_put
;
1669 if (server
->caps
& NFS_CAP_POSIX_LOCK
)
1670 set_bit(NFS_STATE_POSIX_LOCKS
, &state
->flags
);
1671 nfs4_opendata_put(opendata
);
1672 nfs4_put_state_owner(sp
);
1676 nfs4_opendata_put(opendata
);
1677 err_put_state_owner
:
1678 nfs4_put_state_owner(sp
);
1685 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
)
1687 struct nfs4_exception exception
= { };
1688 struct nfs4_state
*res
;
1692 status
= _nfs4_do_open(dir
, path
, fmode
, flags
, sattr
, cred
, &res
);
1695 /* NOTE: BAD_SEQID means the server and client disagree about the
1696 * book-keeping w.r.t. state-changing operations
1697 * (OPEN/CLOSE/LOCK/LOCKU...)
1698 * It is actually a sign of a bug on the client or on the server.
1700 * If we receive a BAD_SEQID error in the particular case of
1701 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1702 * have unhashed the old state_owner for us, and that we can
1703 * therefore safely retry using a new one. We should still warn
1704 * the user though...
1706 if (status
== -NFS4ERR_BAD_SEQID
) {
1707 printk(KERN_WARNING
"NFS: v4 server %s "
1708 " returned a bad sequence-id error!\n",
1709 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1710 exception
.retry
= 1;
1714 * BAD_STATEID on OPEN means that the server cancelled our
1715 * state before it received the OPEN_CONFIRM.
1716 * Recover by retrying the request as per the discussion
1717 * on Page 181 of RFC3530.
1719 if (status
== -NFS4ERR_BAD_STATEID
) {
1720 exception
.retry
= 1;
1723 if (status
== -EAGAIN
) {
1724 /* We must have found a delegation */
1725 exception
.retry
= 1;
1728 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1729 status
, &exception
));
1730 } while (exception
.retry
);
1734 static int _nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1735 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1736 struct nfs4_state
*state
)
1738 struct nfs_server
*server
= NFS_SERVER(inode
);
1739 struct nfs_setattrargs arg
= {
1740 .fh
= NFS_FH(inode
),
1743 .bitmask
= server
->attr_bitmask
,
1745 struct nfs_setattrres res
= {
1749 struct rpc_message msg
= {
1750 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1755 unsigned long timestamp
= jiffies
;
1758 nfs_fattr_init(fattr
);
1760 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1761 /* Use that stateid */
1762 } else if (state
!= NULL
) {
1763 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1765 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1767 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
1768 if (status
== 0 && state
!= NULL
)
1769 renew_lease(server
, timestamp
);
1773 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1774 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1775 struct nfs4_state
*state
)
1777 struct nfs_server
*server
= NFS_SERVER(inode
);
1778 struct nfs4_exception exception
= { };
1781 err
= nfs4_handle_exception(server
,
1782 _nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
),
1784 } while (exception
.retry
);
1788 struct nfs4_closedata
{
1790 struct inode
*inode
;
1791 struct nfs4_state
*state
;
1792 struct nfs_closeargs arg
;
1793 struct nfs_closeres res
;
1794 struct nfs_fattr fattr
;
1795 unsigned long timestamp
;
1798 static void nfs4_free_closedata(void *data
)
1800 struct nfs4_closedata
*calldata
= data
;
1801 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1803 nfs4_put_open_state(calldata
->state
);
1804 nfs_free_seqid(calldata
->arg
.seqid
);
1805 nfs4_put_state_owner(sp
);
1806 path_put(&calldata
->path
);
1810 static void nfs4_close_clear_stateid_flags(struct nfs4_state
*state
,
1813 spin_lock(&state
->owner
->so_lock
);
1814 if (!(fmode
& FMODE_READ
))
1815 clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1816 if (!(fmode
& FMODE_WRITE
))
1817 clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1818 clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1819 spin_unlock(&state
->owner
->so_lock
);
1822 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1824 struct nfs4_closedata
*calldata
= data
;
1825 struct nfs4_state
*state
= calldata
->state
;
1826 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1828 nfs4_sequence_done(server
, &calldata
->res
.seq_res
, task
->tk_status
);
1829 if (RPC_ASSASSINATED(task
))
1831 /* hmm. we are done with the inode, and in the process of freeing
1832 * the state_owner. we keep this around to process errors
1834 switch (task
->tk_status
) {
1836 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, 0);
1837 renew_lease(server
, calldata
->timestamp
);
1838 nfs4_close_clear_stateid_flags(state
,
1839 calldata
->arg
.fmode
);
1841 case -NFS4ERR_STALE_STATEID
:
1842 case -NFS4ERR_OLD_STATEID
:
1843 case -NFS4ERR_BAD_STATEID
:
1844 case -NFS4ERR_EXPIRED
:
1845 if (calldata
->arg
.fmode
== 0)
1848 if (nfs4_async_handle_error(task
, server
, state
) == -EAGAIN
)
1849 rpc_restart_call_prepare(task
);
1851 nfs_release_seqid(calldata
->arg
.seqid
);
1852 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1855 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1857 struct nfs4_closedata
*calldata
= data
;
1858 struct nfs4_state
*state
= calldata
->state
;
1861 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1864 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1865 calldata
->arg
.fmode
= FMODE_READ
|FMODE_WRITE
;
1866 spin_lock(&state
->owner
->so_lock
);
1867 /* Calculate the change in open mode */
1868 if (state
->n_rdwr
== 0) {
1869 if (state
->n_rdonly
== 0) {
1870 call_close
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1871 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1872 calldata
->arg
.fmode
&= ~FMODE_READ
;
1874 if (state
->n_wronly
== 0) {
1875 call_close
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1876 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1877 calldata
->arg
.fmode
&= ~FMODE_WRITE
;
1880 spin_unlock(&state
->owner
->so_lock
);
1883 /* Note: exit _without_ calling nfs4_close_done */
1884 task
->tk_action
= NULL
;
1888 if (calldata
->arg
.fmode
== 0)
1889 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
];
1891 nfs_fattr_init(calldata
->res
.fattr
);
1892 calldata
->timestamp
= jiffies
;
1893 if (nfs4_setup_sequence((NFS_SERVER(calldata
->inode
))->nfs_client
,
1894 &calldata
->arg
.seq_args
, &calldata
->res
.seq_res
,
1897 rpc_call_start(task
);
1900 static const struct rpc_call_ops nfs4_close_ops
= {
1901 .rpc_call_prepare
= nfs4_close_prepare
,
1902 .rpc_call_done
= nfs4_close_done
,
1903 .rpc_release
= nfs4_free_closedata
,
1907 * It is possible for data to be read/written from a mem-mapped file
1908 * after the sys_close call (which hits the vfs layer as a flush).
1909 * This means that we can't safely call nfsv4 close on a file until
1910 * the inode is cleared. This in turn means that we are not good
1911 * NFSv4 citizens - we do not indicate to the server to update the file's
1912 * share state even when we are done with one of the three share
1913 * stateid's in the inode.
1915 * NOTE: Caller must be holding the sp->so_owner semaphore!
1917 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
, int wait
)
1919 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1920 struct nfs4_closedata
*calldata
;
1921 struct nfs4_state_owner
*sp
= state
->owner
;
1922 struct rpc_task
*task
;
1923 struct rpc_message msg
= {
1924 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1925 .rpc_cred
= state
->owner
->so_cred
,
1927 struct rpc_task_setup task_setup_data
= {
1928 .rpc_client
= server
->client
,
1929 .rpc_message
= &msg
,
1930 .callback_ops
= &nfs4_close_ops
,
1931 .workqueue
= nfsiod_workqueue
,
1932 .flags
= RPC_TASK_ASYNC
,
1934 int status
= -ENOMEM
;
1936 calldata
= kzalloc(sizeof(*calldata
), GFP_KERNEL
);
1937 if (calldata
== NULL
)
1939 calldata
->inode
= state
->inode
;
1940 calldata
->state
= state
;
1941 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1942 calldata
->arg
.stateid
= &state
->open_stateid
;
1943 /* Serialization for the sequence id */
1944 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
1945 if (calldata
->arg
.seqid
== NULL
)
1946 goto out_free_calldata
;
1947 calldata
->arg
.fmode
= 0;
1948 calldata
->arg
.bitmask
= server
->cache_consistency_bitmask
;
1949 calldata
->res
.fattr
= &calldata
->fattr
;
1950 calldata
->res
.seqid
= calldata
->arg
.seqid
;
1951 calldata
->res
.server
= server
;
1952 calldata
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
1954 calldata
->path
= *path
;
1956 msg
.rpc_argp
= &calldata
->arg
,
1957 msg
.rpc_resp
= &calldata
->res
,
1958 task_setup_data
.callback_data
= calldata
;
1959 task
= rpc_run_task(&task_setup_data
);
1961 return PTR_ERR(task
);
1964 status
= rpc_wait_for_completion_task(task
);
1970 nfs4_put_open_state(state
);
1971 nfs4_put_state_owner(sp
);
1975 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
, fmode_t fmode
)
1980 /* If the open_intent is for execute, we have an extra check to make */
1981 if (fmode
& FMODE_EXEC
) {
1982 ret
= nfs_may_open(state
->inode
,
1983 state
->owner
->so_cred
,
1984 nd
->intent
.open
.flags
);
1988 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
1989 if (!IS_ERR(filp
)) {
1990 struct nfs_open_context
*ctx
;
1991 ctx
= nfs_file_open_context(filp
);
1995 ret
= PTR_ERR(filp
);
1997 nfs4_close_sync(path
, state
, fmode
& (FMODE_READ
|FMODE_WRITE
));
2002 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
2004 struct path path
= {
2005 .mnt
= nd
->path
.mnt
,
2008 struct dentry
*parent
;
2010 struct rpc_cred
*cred
;
2011 struct nfs4_state
*state
;
2013 fmode_t fmode
= nd
->intent
.open
.flags
& (FMODE_READ
| FMODE_WRITE
| FMODE_EXEC
);
2015 if (nd
->flags
& LOOKUP_CREATE
) {
2016 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
2017 attr
.ia_valid
= ATTR_MODE
;
2018 if (!IS_POSIXACL(dir
))
2019 attr
.ia_mode
&= ~current_umask();
2022 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
2025 cred
= rpc_lookup_cred();
2027 return (struct dentry
*)cred
;
2028 parent
= dentry
->d_parent
;
2029 /* Protect against concurrent sillydeletes */
2030 nfs_block_sillyrename(parent
);
2031 state
= nfs4_do_open(dir
, &path
, fmode
, nd
->intent
.open
.flags
, &attr
, cred
);
2033 if (IS_ERR(state
)) {
2034 if (PTR_ERR(state
) == -ENOENT
) {
2035 d_add(dentry
, NULL
);
2036 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2038 nfs_unblock_sillyrename(parent
);
2039 return (struct dentry
*)state
;
2041 res
= d_add_unique(dentry
, igrab(state
->inode
));
2044 nfs_set_verifier(path
.dentry
, nfs_save_change_attribute(dir
));
2045 nfs_unblock_sillyrename(parent
);
2046 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2051 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
2053 struct path path
= {
2054 .mnt
= nd
->path
.mnt
,
2057 struct rpc_cred
*cred
;
2058 struct nfs4_state
*state
;
2059 fmode_t fmode
= openflags
& (FMODE_READ
| FMODE_WRITE
);
2061 cred
= rpc_lookup_cred();
2063 return PTR_ERR(cred
);
2064 state
= nfs4_do_open(dir
, &path
, fmode
, openflags
, NULL
, cred
);
2066 if (IS_ERR(state
)) {
2067 switch (PTR_ERR(state
)) {
2073 return PTR_ERR(state
);
2078 if (state
->inode
== dentry
->d_inode
) {
2079 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2080 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2083 nfs4_close_sync(&path
, state
, fmode
);
2089 static void nfs4_close_context(struct nfs_open_context
*ctx
, int is_sync
)
2091 if (ctx
->state
== NULL
)
2094 nfs4_close_sync(&ctx
->path
, ctx
->state
, ctx
->mode
);
2096 nfs4_close_state(&ctx
->path
, ctx
->state
, ctx
->mode
);
2099 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
2101 struct nfs4_server_caps_arg args
= {
2104 struct nfs4_server_caps_res res
= {};
2105 struct rpc_message msg
= {
2106 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
2112 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2114 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
2115 server
->caps
&= ~(NFS_CAP_ACLS
|NFS_CAP_HARDLINKS
|
2116 NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
2117 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|
2118 NFS_CAP_OWNER_GROUP
|NFS_CAP_ATIME
|
2119 NFS_CAP_CTIME
|NFS_CAP_MTIME
);
2120 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
2121 server
->caps
|= NFS_CAP_ACLS
;
2122 if (res
.has_links
!= 0)
2123 server
->caps
|= NFS_CAP_HARDLINKS
;
2124 if (res
.has_symlinks
!= 0)
2125 server
->caps
|= NFS_CAP_SYMLINKS
;
2126 if (res
.attr_bitmask
[0] & FATTR4_WORD0_FILEID
)
2127 server
->caps
|= NFS_CAP_FILEID
;
2128 if (res
.attr_bitmask
[1] & FATTR4_WORD1_MODE
)
2129 server
->caps
|= NFS_CAP_MODE
;
2130 if (res
.attr_bitmask
[1] & FATTR4_WORD1_NUMLINKS
)
2131 server
->caps
|= NFS_CAP_NLINK
;
2132 if (res
.attr_bitmask
[1] & FATTR4_WORD1_OWNER
)
2133 server
->caps
|= NFS_CAP_OWNER
;
2134 if (res
.attr_bitmask
[1] & FATTR4_WORD1_OWNER_GROUP
)
2135 server
->caps
|= NFS_CAP_OWNER_GROUP
;
2136 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_ACCESS
)
2137 server
->caps
|= NFS_CAP_ATIME
;
2138 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_METADATA
)
2139 server
->caps
|= NFS_CAP_CTIME
;
2140 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_MODIFY
)
2141 server
->caps
|= NFS_CAP_MTIME
;
2143 memcpy(server
->cache_consistency_bitmask
, res
.attr_bitmask
, sizeof(server
->cache_consistency_bitmask
));
2144 server
->cache_consistency_bitmask
[0] &= FATTR4_WORD0_CHANGE
|FATTR4_WORD0_SIZE
;
2145 server
->cache_consistency_bitmask
[1] &= FATTR4_WORD1_TIME_METADATA
|FATTR4_WORD1_TIME_MODIFY
;
2146 server
->acl_bitmask
= res
.acl_bitmask
;
2152 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
2154 struct nfs4_exception exception
= { };
2157 err
= nfs4_handle_exception(server
,
2158 _nfs4_server_capabilities(server
, fhandle
),
2160 } while (exception
.retry
);
2164 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2165 struct nfs_fsinfo
*info
)
2167 struct nfs4_lookup_root_arg args
= {
2168 .bitmask
= nfs4_fattr_bitmap
,
2170 struct nfs4_lookup_res res
= {
2172 .fattr
= info
->fattr
,
2175 struct rpc_message msg
= {
2176 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
2181 nfs_fattr_init(info
->fattr
);
2182 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2185 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2186 struct nfs_fsinfo
*info
)
2188 struct nfs4_exception exception
= { };
2191 err
= nfs4_handle_exception(server
,
2192 _nfs4_lookup_root(server
, fhandle
, info
),
2194 } while (exception
.retry
);
2199 * get the file handle for the "/" directory on the server
2201 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2202 struct nfs_fsinfo
*info
)
2206 status
= nfs4_lookup_root(server
, fhandle
, info
);
2208 status
= nfs4_server_capabilities(server
, fhandle
);
2210 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
2211 return nfs4_map_errors(status
);
2215 * Get locations and (maybe) other attributes of a referral.
2216 * Note that we'll actually follow the referral later when
2217 * we detect fsid mismatch in inode revalidation
2219 static int nfs4_get_referral(struct inode
*dir
, const struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
2221 int status
= -ENOMEM
;
2222 struct page
*page
= NULL
;
2223 struct nfs4_fs_locations
*locations
= NULL
;
2225 page
= alloc_page(GFP_KERNEL
);
2228 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
2229 if (locations
== NULL
)
2232 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
2235 /* Make sure server returned a different fsid for the referral */
2236 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
2237 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__
, name
->name
);
2242 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
2243 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
2245 fattr
->mode
= S_IFDIR
;
2246 memset(fhandle
, 0, sizeof(struct nfs_fh
));
2255 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2257 struct nfs4_getattr_arg args
= {
2259 .bitmask
= server
->attr_bitmask
,
2261 struct nfs4_getattr_res res
= {
2265 struct rpc_message msg
= {
2266 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
2271 nfs_fattr_init(fattr
);
2272 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2275 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2277 struct nfs4_exception exception
= { };
2280 err
= nfs4_handle_exception(server
,
2281 _nfs4_proc_getattr(server
, fhandle
, fattr
),
2283 } while (exception
.retry
);
2288 * The file is not closed if it is opened due to the a request to change
2289 * the size of the file. The open call will not be needed once the
2290 * VFS layer lookup-intents are implemented.
2292 * Close is called when the inode is destroyed.
2293 * If we haven't opened the file for O_WRONLY, we
2294 * need to in the size_change case to obtain a stateid.
2297 * Because OPEN is always done by name in nfsv4, it is
2298 * possible that we opened a different file by the same
2299 * name. We can recognize this race condition, but we
2300 * can't do anything about it besides returning an error.
2302 * This will be fixed with VFS changes (lookup-intent).
2305 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
2306 struct iattr
*sattr
)
2308 struct inode
*inode
= dentry
->d_inode
;
2309 struct rpc_cred
*cred
= NULL
;
2310 struct nfs4_state
*state
= NULL
;
2313 nfs_fattr_init(fattr
);
2315 /* Search for an existing open(O_WRITE) file */
2316 if (sattr
->ia_valid
& ATTR_FILE
) {
2317 struct nfs_open_context
*ctx
;
2319 ctx
= nfs_file_open_context(sattr
->ia_file
);
2326 status
= nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
);
2328 nfs_setattr_update_inode(inode
, sattr
);
2332 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, const struct nfs_fh
*dirfh
,
2333 const struct qstr
*name
, struct nfs_fh
*fhandle
,
2334 struct nfs_fattr
*fattr
)
2337 struct nfs4_lookup_arg args
= {
2338 .bitmask
= server
->attr_bitmask
,
2342 struct nfs4_lookup_res res
= {
2347 struct rpc_message msg
= {
2348 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
2353 nfs_fattr_init(fattr
);
2355 dprintk("NFS call lookupfh %s\n", name
->name
);
2356 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2357 dprintk("NFS reply lookupfh: %d\n", status
);
2361 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
2362 struct qstr
*name
, struct nfs_fh
*fhandle
,
2363 struct nfs_fattr
*fattr
)
2365 struct nfs4_exception exception
= { };
2368 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
2370 if (err
== -NFS4ERR_MOVED
) {
2374 err
= nfs4_handle_exception(server
, err
, &exception
);
2375 } while (exception
.retry
);
2379 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
,
2380 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2384 dprintk("NFS call lookup %s\n", name
->name
);
2385 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
2386 if (status
== -NFS4ERR_MOVED
)
2387 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
2388 dprintk("NFS reply lookup: %d\n", status
);
2392 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2394 struct nfs4_exception exception
= { };
2397 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2398 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
2400 } while (exception
.retry
);
2404 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
2406 struct nfs_server
*server
= NFS_SERVER(inode
);
2407 struct nfs_fattr fattr
;
2408 struct nfs4_accessargs args
= {
2409 .fh
= NFS_FH(inode
),
2410 .bitmask
= server
->attr_bitmask
,
2412 struct nfs4_accessres res
= {
2416 struct rpc_message msg
= {
2417 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
2420 .rpc_cred
= entry
->cred
,
2422 int mode
= entry
->mask
;
2426 * Determine which access bits we want to ask for...
2428 if (mode
& MAY_READ
)
2429 args
.access
|= NFS4_ACCESS_READ
;
2430 if (S_ISDIR(inode
->i_mode
)) {
2431 if (mode
& MAY_WRITE
)
2432 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
2433 if (mode
& MAY_EXEC
)
2434 args
.access
|= NFS4_ACCESS_LOOKUP
;
2436 if (mode
& MAY_WRITE
)
2437 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
2438 if (mode
& MAY_EXEC
)
2439 args
.access
|= NFS4_ACCESS_EXECUTE
;
2441 nfs_fattr_init(&fattr
);
2442 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2445 if (res
.access
& NFS4_ACCESS_READ
)
2446 entry
->mask
|= MAY_READ
;
2447 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
2448 entry
->mask
|= MAY_WRITE
;
2449 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
2450 entry
->mask
|= MAY_EXEC
;
2451 nfs_refresh_inode(inode
, &fattr
);
2456 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
2458 struct nfs4_exception exception
= { };
2461 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2462 _nfs4_proc_access(inode
, entry
),
2464 } while (exception
.retry
);
2469 * TODO: For the time being, we don't try to get any attributes
2470 * along with any of the zero-copy operations READ, READDIR,
2473 * In the case of the first three, we want to put the GETATTR
2474 * after the read-type operation -- this is because it is hard
2475 * to predict the length of a GETATTR response in v4, and thus
2476 * align the READ data correctly. This means that the GETATTR
2477 * may end up partially falling into the page cache, and we should
2478 * shift it into the 'tail' of the xdr_buf before processing.
2479 * To do this efficiently, we need to know the total length
2480 * of data received, which doesn't seem to be available outside
2483 * In the case of WRITE, we also want to put the GETATTR after
2484 * the operation -- in this case because we want to make sure
2485 * we get the post-operation mtime and size. This means that
2486 * we can't use xdr_encode_pages() as written: we need a variant
2487 * of it which would leave room in the 'tail' iovec.
2489 * Both of these changes to the XDR layer would in fact be quite
2490 * minor, but I decided to leave them for a subsequent patch.
2492 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2493 unsigned int pgbase
, unsigned int pglen
)
2495 struct nfs4_readlink args
= {
2496 .fh
= NFS_FH(inode
),
2501 struct nfs4_readlink_res res
;
2502 struct rpc_message msg
= {
2503 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
2508 return nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
2511 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2512 unsigned int pgbase
, unsigned int pglen
)
2514 struct nfs4_exception exception
= { };
2517 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2518 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
2520 } while (exception
.retry
);
2526 * We will need to arrange for the VFS layer to provide an atomic open.
2527 * Until then, this create/open method is prone to inefficiency and race
2528 * conditions due to the lookup, create, and open VFS calls from sys_open()
2529 * placed on the wire.
2531 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2532 * The file will be opened again in the subsequent VFS open call
2533 * (nfs4_proc_file_open).
2535 * The open for read will just hang around to be used by any process that
2536 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2540 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
2541 int flags
, struct nameidata
*nd
)
2543 struct path path
= {
2544 .mnt
= nd
->path
.mnt
,
2547 struct nfs4_state
*state
;
2548 struct rpc_cred
*cred
;
2549 fmode_t fmode
= flags
& (FMODE_READ
| FMODE_WRITE
);
2552 cred
= rpc_lookup_cred();
2554 status
= PTR_ERR(cred
);
2557 state
= nfs4_do_open(dir
, &path
, fmode
, flags
, sattr
, cred
);
2559 if (IS_ERR(state
)) {
2560 status
= PTR_ERR(state
);
2563 d_add(dentry
, igrab(state
->inode
));
2564 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2565 if (flags
& O_EXCL
) {
2566 struct nfs_fattr fattr
;
2567 status
= nfs4_do_setattr(state
->inode
, cred
, &fattr
, sattr
, state
);
2569 nfs_setattr_update_inode(state
->inode
, sattr
);
2570 nfs_post_op_update_inode(state
->inode
, &fattr
);
2572 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
2573 status
= nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2575 nfs4_close_sync(&path
, state
, fmode
);
2582 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2584 struct nfs_server
*server
= NFS_SERVER(dir
);
2585 struct nfs_removeargs args
= {
2587 .name
.len
= name
->len
,
2588 .name
.name
= name
->name
,
2589 .bitmask
= server
->attr_bitmask
,
2591 struct nfs_removeres res
= {
2594 struct rpc_message msg
= {
2595 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
2601 nfs_fattr_init(&res
.dir_attr
);
2602 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 1);
2604 update_changeattr(dir
, &res
.cinfo
);
2605 nfs_post_op_update_inode(dir
, &res
.dir_attr
);
2610 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2612 struct nfs4_exception exception
= { };
2615 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2616 _nfs4_proc_remove(dir
, name
),
2618 } while (exception
.retry
);
2622 static void nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct inode
*dir
)
2624 struct nfs_server
*server
= NFS_SERVER(dir
);
2625 struct nfs_removeargs
*args
= msg
->rpc_argp
;
2626 struct nfs_removeres
*res
= msg
->rpc_resp
;
2628 args
->bitmask
= server
->cache_consistency_bitmask
;
2629 res
->server
= server
;
2630 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
2633 static int nfs4_proc_unlink_done(struct rpc_task
*task
, struct inode
*dir
)
2635 struct nfs_removeres
*res
= task
->tk_msg
.rpc_resp
;
2637 nfs4_sequence_done(res
->server
, &res
->seq_res
, task
->tk_status
);
2638 if (nfs4_async_handle_error(task
, res
->server
, NULL
) == -EAGAIN
)
2640 update_changeattr(dir
, &res
->cinfo
);
2641 nfs_post_op_update_inode(dir
, &res
->dir_attr
);
2645 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2646 struct inode
*new_dir
, struct qstr
*new_name
)
2648 struct nfs_server
*server
= NFS_SERVER(old_dir
);
2649 struct nfs4_rename_arg arg
= {
2650 .old_dir
= NFS_FH(old_dir
),
2651 .new_dir
= NFS_FH(new_dir
),
2652 .old_name
= old_name
,
2653 .new_name
= new_name
,
2654 .bitmask
= server
->attr_bitmask
,
2656 struct nfs_fattr old_fattr
, new_fattr
;
2657 struct nfs4_rename_res res
= {
2659 .old_fattr
= &old_fattr
,
2660 .new_fattr
= &new_fattr
,
2662 struct rpc_message msg
= {
2663 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2669 nfs_fattr_init(res
.old_fattr
);
2670 nfs_fattr_init(res
.new_fattr
);
2671 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2674 update_changeattr(old_dir
, &res
.old_cinfo
);
2675 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2676 update_changeattr(new_dir
, &res
.new_cinfo
);
2677 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2682 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2683 struct inode
*new_dir
, struct qstr
*new_name
)
2685 struct nfs4_exception exception
= { };
2688 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2689 _nfs4_proc_rename(old_dir
, old_name
,
2692 } while (exception
.retry
);
2696 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2698 struct nfs_server
*server
= NFS_SERVER(inode
);
2699 struct nfs4_link_arg arg
= {
2700 .fh
= NFS_FH(inode
),
2701 .dir_fh
= NFS_FH(dir
),
2703 .bitmask
= server
->attr_bitmask
,
2705 struct nfs_fattr fattr
, dir_attr
;
2706 struct nfs4_link_res res
= {
2709 .dir_attr
= &dir_attr
,
2711 struct rpc_message msg
= {
2712 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2718 nfs_fattr_init(res
.fattr
);
2719 nfs_fattr_init(res
.dir_attr
);
2720 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2722 update_changeattr(dir
, &res
.cinfo
);
2723 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2724 nfs_post_op_update_inode(inode
, res
.fattr
);
2730 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2732 struct nfs4_exception exception
= { };
2735 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2736 _nfs4_proc_link(inode
, dir
, name
),
2738 } while (exception
.retry
);
2742 struct nfs4_createdata
{
2743 struct rpc_message msg
;
2744 struct nfs4_create_arg arg
;
2745 struct nfs4_create_res res
;
2747 struct nfs_fattr fattr
;
2748 struct nfs_fattr dir_fattr
;
2751 static struct nfs4_createdata
*nfs4_alloc_createdata(struct inode
*dir
,
2752 struct qstr
*name
, struct iattr
*sattr
, u32 ftype
)
2754 struct nfs4_createdata
*data
;
2756 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
2758 struct nfs_server
*server
= NFS_SERVER(dir
);
2760 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
];
2761 data
->msg
.rpc_argp
= &data
->arg
;
2762 data
->msg
.rpc_resp
= &data
->res
;
2763 data
->arg
.dir_fh
= NFS_FH(dir
);
2764 data
->arg
.server
= server
;
2765 data
->arg
.name
= name
;
2766 data
->arg
.attrs
= sattr
;
2767 data
->arg
.ftype
= ftype
;
2768 data
->arg
.bitmask
= server
->attr_bitmask
;
2769 data
->res
.server
= server
;
2770 data
->res
.fh
= &data
->fh
;
2771 data
->res
.fattr
= &data
->fattr
;
2772 data
->res
.dir_fattr
= &data
->dir_fattr
;
2773 nfs_fattr_init(data
->res
.fattr
);
2774 nfs_fattr_init(data
->res
.dir_fattr
);
2779 static int nfs4_do_create(struct inode
*dir
, struct dentry
*dentry
, struct nfs4_createdata
*data
)
2781 int status
= nfs4_call_sync(NFS_SERVER(dir
), &data
->msg
,
2782 &data
->arg
, &data
->res
, 1);
2784 update_changeattr(dir
, &data
->res
.dir_cinfo
);
2785 nfs_post_op_update_inode(dir
, data
->res
.dir_fattr
);
2786 status
= nfs_instantiate(dentry
, data
->res
.fh
, data
->res
.fattr
);
2791 static void nfs4_free_createdata(struct nfs4_createdata
*data
)
2796 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2797 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2799 struct nfs4_createdata
*data
;
2800 int status
= -ENAMETOOLONG
;
2802 if (len
> NFS4_MAXPATHLEN
)
2806 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4LNK
);
2810 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
];
2811 data
->arg
.u
.symlink
.pages
= &page
;
2812 data
->arg
.u
.symlink
.len
= len
;
2814 status
= nfs4_do_create(dir
, dentry
, data
);
2816 nfs4_free_createdata(data
);
2821 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2822 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2824 struct nfs4_exception exception
= { };
2827 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2828 _nfs4_proc_symlink(dir
, dentry
, page
,
2831 } while (exception
.retry
);
2835 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2836 struct iattr
*sattr
)
2838 struct nfs4_createdata
*data
;
2839 int status
= -ENOMEM
;
2841 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4DIR
);
2845 status
= nfs4_do_create(dir
, dentry
, data
);
2847 nfs4_free_createdata(data
);
2852 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2853 struct iattr
*sattr
)
2855 struct nfs4_exception exception
= { };
2858 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2859 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2861 } while (exception
.retry
);
2865 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2866 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2868 struct inode
*dir
= dentry
->d_inode
;
2869 struct nfs4_readdir_arg args
= {
2874 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
2876 struct nfs4_readdir_res res
;
2877 struct rpc_message msg
= {
2878 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2885 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__
,
2886 dentry
->d_parent
->d_name
.name
,
2887 dentry
->d_name
.name
,
2888 (unsigned long long)cookie
);
2889 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2890 res
.pgbase
= args
.pgbase
;
2891 status
= nfs4_call_sync(NFS_SERVER(dir
), &msg
, &args
, &res
, 0);
2893 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2895 nfs_invalidate_atime(dir
);
2897 dprintk("%s: returns %d\n", __func__
, status
);
2901 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2902 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2904 struct nfs4_exception exception
= { };
2907 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2908 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2911 } while (exception
.retry
);
2915 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2916 struct iattr
*sattr
, dev_t rdev
)
2918 struct nfs4_createdata
*data
;
2919 int mode
= sattr
->ia_mode
;
2920 int status
= -ENOMEM
;
2922 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2923 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2925 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4SOCK
);
2930 data
->arg
.ftype
= NF4FIFO
;
2931 else if (S_ISBLK(mode
)) {
2932 data
->arg
.ftype
= NF4BLK
;
2933 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2934 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2936 else if (S_ISCHR(mode
)) {
2937 data
->arg
.ftype
= NF4CHR
;
2938 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2939 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2942 status
= nfs4_do_create(dir
, dentry
, data
);
2944 nfs4_free_createdata(data
);
2949 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2950 struct iattr
*sattr
, dev_t rdev
)
2952 struct nfs4_exception exception
= { };
2955 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2956 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2958 } while (exception
.retry
);
2962 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2963 struct nfs_fsstat
*fsstat
)
2965 struct nfs4_statfs_arg args
= {
2967 .bitmask
= server
->attr_bitmask
,
2969 struct nfs4_statfs_res res
= {
2972 struct rpc_message msg
= {
2973 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2978 nfs_fattr_init(fsstat
->fattr
);
2979 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2982 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2984 struct nfs4_exception exception
= { };
2987 err
= nfs4_handle_exception(server
,
2988 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2990 } while (exception
.retry
);
2994 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2995 struct nfs_fsinfo
*fsinfo
)
2997 struct nfs4_fsinfo_arg args
= {
2999 .bitmask
= server
->attr_bitmask
,
3001 struct nfs4_fsinfo_res res
= {
3004 struct rpc_message msg
= {
3005 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
3010 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
3013 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
3015 struct nfs4_exception exception
= { };
3019 err
= nfs4_handle_exception(server
,
3020 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
3022 } while (exception
.retry
);
3026 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
3028 nfs_fattr_init(fsinfo
->fattr
);
3029 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
3032 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3033 struct nfs_pathconf
*pathconf
)
3035 struct nfs4_pathconf_arg args
= {
3037 .bitmask
= server
->attr_bitmask
,
3039 struct nfs4_pathconf_res res
= {
3040 .pathconf
= pathconf
,
3042 struct rpc_message msg
= {
3043 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
3048 /* None of the pathconf attributes are mandatory to implement */
3049 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
3050 memset(pathconf
, 0, sizeof(*pathconf
));
3054 nfs_fattr_init(pathconf
->fattr
);
3055 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
3058 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3059 struct nfs_pathconf
*pathconf
)
3061 struct nfs4_exception exception
= { };
3065 err
= nfs4_handle_exception(server
,
3066 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
3068 } while (exception
.retry
);
3072 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
3074 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
3076 dprintk("--> %s\n", __func__
);
3078 nfs4_sequence_done(server
, &data
->res
.seq_res
, task
->tk_status
);
3080 if (nfs4_async_handle_error(task
, server
, data
->args
.context
->state
) == -EAGAIN
) {
3081 nfs_restart_rpc(task
, server
->nfs_client
);
3085 nfs_invalidate_atime(data
->inode
);
3086 if (task
->tk_status
> 0)
3087 renew_lease(server
, data
->timestamp
);
3091 static void nfs4_proc_read_setup(struct nfs_read_data
*data
, struct rpc_message
*msg
)
3093 data
->timestamp
= jiffies
;
3094 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
];
3097 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
3099 struct inode
*inode
= data
->inode
;
3101 nfs4_sequence_done(NFS_SERVER(inode
), &data
->res
.seq_res
,
3104 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), data
->args
.context
->state
) == -EAGAIN
) {
3105 nfs_restart_rpc(task
, NFS_SERVER(inode
)->nfs_client
);
3108 if (task
->tk_status
>= 0) {
3109 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
3110 nfs_post_op_update_inode_force_wcc(inode
, data
->res
.fattr
);
3115 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
3117 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
3119 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
3120 data
->res
.server
= server
;
3121 data
->timestamp
= jiffies
;
3123 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
];
3126 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
3128 struct inode
*inode
= data
->inode
;
3130 nfs4_sequence_done(NFS_SERVER(inode
), &data
->res
.seq_res
,
3132 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), NULL
) == -EAGAIN
) {
3133 nfs_restart_rpc(task
, NFS_SERVER(inode
)->nfs_client
);
3136 nfs_refresh_inode(inode
, data
->res
.fattr
);
3140 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
3142 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
3144 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
3145 data
->res
.server
= server
;
3146 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
];
3150 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3151 * standalone procedure for queueing an asynchronous RENEW.
3153 static void nfs4_renew_release(void *data
)
3155 struct nfs_client
*clp
= data
;
3157 if (atomic_read(&clp
->cl_count
) > 1)
3158 nfs4_schedule_state_renewal(clp
);
3159 nfs_put_client(clp
);
3162 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
3164 struct nfs_client
*clp
= data
;
3165 unsigned long timestamp
= task
->tk_start
;
3167 if (task
->tk_status
< 0) {
3168 /* Unless we're shutting down, schedule state recovery! */
3169 if (test_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
) != 0)
3170 nfs4_schedule_state_recovery(clp
);
3173 spin_lock(&clp
->cl_lock
);
3174 if (time_before(clp
->cl_last_renewal
,timestamp
))
3175 clp
->cl_last_renewal
= timestamp
;
3176 spin_unlock(&clp
->cl_lock
);
3179 static const struct rpc_call_ops nfs4_renew_ops
= {
3180 .rpc_call_done
= nfs4_renew_done
,
3181 .rpc_release
= nfs4_renew_release
,
3184 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3186 struct rpc_message msg
= {
3187 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
3192 if (!atomic_inc_not_zero(&clp
->cl_count
))
3194 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
3195 &nfs4_renew_ops
, clp
);
3198 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3200 struct rpc_message msg
= {
3201 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
3205 unsigned long now
= jiffies
;
3208 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3211 spin_lock(&clp
->cl_lock
);
3212 if (time_before(clp
->cl_last_renewal
,now
))
3213 clp
->cl_last_renewal
= now
;
3214 spin_unlock(&clp
->cl_lock
);
3218 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
3220 return (server
->caps
& NFS_CAP_ACLS
)
3221 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
3222 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
3225 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3226 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3229 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3231 static void buf_to_pages(const void *buf
, size_t buflen
,
3232 struct page
**pages
, unsigned int *pgbase
)
3234 const void *p
= buf
;
3236 *pgbase
= offset_in_page(buf
);
3238 while (p
< buf
+ buflen
) {
3239 *(pages
++) = virt_to_page(p
);
3240 p
+= PAGE_CACHE_SIZE
;
3244 struct nfs4_cached_acl
{
3250 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
3252 struct nfs_inode
*nfsi
= NFS_I(inode
);
3254 spin_lock(&inode
->i_lock
);
3255 kfree(nfsi
->nfs4_acl
);
3256 nfsi
->nfs4_acl
= acl
;
3257 spin_unlock(&inode
->i_lock
);
3260 static void nfs4_zap_acl_attr(struct inode
*inode
)
3262 nfs4_set_cached_acl(inode
, NULL
);
3265 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
3267 struct nfs_inode
*nfsi
= NFS_I(inode
);
3268 struct nfs4_cached_acl
*acl
;
3271 spin_lock(&inode
->i_lock
);
3272 acl
= nfsi
->nfs4_acl
;
3275 if (buf
== NULL
) /* user is just asking for length */
3277 if (acl
->cached
== 0)
3279 ret
= -ERANGE
; /* see getxattr(2) man page */
3280 if (acl
->len
> buflen
)
3282 memcpy(buf
, acl
->data
, acl
->len
);
3286 spin_unlock(&inode
->i_lock
);
3290 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
3292 struct nfs4_cached_acl
*acl
;
3294 if (buf
&& acl_len
<= PAGE_SIZE
) {
3295 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
3299 memcpy(acl
->data
, buf
, acl_len
);
3301 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
3308 nfs4_set_cached_acl(inode
, acl
);
3311 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3313 struct page
*pages
[NFS4ACL_MAXPAGES
];
3314 struct nfs_getaclargs args
= {
3315 .fh
= NFS_FH(inode
),
3319 struct nfs_getaclres res
= {
3323 struct rpc_message msg
= {
3324 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
3328 struct page
*localpage
= NULL
;
3331 if (buflen
< PAGE_SIZE
) {
3332 /* As long as we're doing a round trip to the server anyway,
3333 * let's be prepared for a page of acl data. */
3334 localpage
= alloc_page(GFP_KERNEL
);
3335 resp_buf
= page_address(localpage
);
3336 if (localpage
== NULL
)
3338 args
.acl_pages
[0] = localpage
;
3339 args
.acl_pgbase
= 0;
3340 args
.acl_len
= PAGE_SIZE
;
3343 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
3345 ret
= nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
3348 if (res
.acl_len
> args
.acl_len
)
3349 nfs4_write_cached_acl(inode
, NULL
, res
.acl_len
);
3351 nfs4_write_cached_acl(inode
, resp_buf
, res
.acl_len
);
3354 if (res
.acl_len
> buflen
)
3357 memcpy(buf
, resp_buf
, res
.acl_len
);
3362 __free_page(localpage
);
3366 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3368 struct nfs4_exception exception
= { };
3371 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
3374 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
3375 } while (exception
.retry
);
3379 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
3381 struct nfs_server
*server
= NFS_SERVER(inode
);
3384 if (!nfs4_server_supports_acls(server
))
3386 ret
= nfs_revalidate_inode(server
, inode
);
3389 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
3392 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
3395 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3397 struct nfs_server
*server
= NFS_SERVER(inode
);
3398 struct page
*pages
[NFS4ACL_MAXPAGES
];
3399 struct nfs_setaclargs arg
= {
3400 .fh
= NFS_FH(inode
),
3404 struct nfs_setaclres res
;
3405 struct rpc_message msg
= {
3406 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
3412 if (!nfs4_server_supports_acls(server
))
3414 nfs_inode_return_delegation(inode
);
3415 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
3416 ret
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
3417 nfs_access_zap_cache(inode
);
3418 nfs_zap_acl_cache(inode
);
3422 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3424 struct nfs4_exception exception
= { };
3427 err
= nfs4_handle_exception(NFS_SERVER(inode
),
3428 __nfs4_proc_set_acl(inode
, buf
, buflen
),
3430 } while (exception
.retry
);
3435 _nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs_client
*clp
, struct nfs4_state
*state
)
3437 if (!clp
|| task
->tk_status
>= 0)
3439 switch(task
->tk_status
) {
3440 case -NFS4ERR_ADMIN_REVOKED
:
3441 case -NFS4ERR_BAD_STATEID
:
3442 case -NFS4ERR_OPENMODE
:
3445 nfs4_state_mark_reclaim_nograce(clp
, state
);
3446 goto do_state_recovery
;
3447 case -NFS4ERR_STALE_STATEID
:
3450 nfs4_state_mark_reclaim_reboot(clp
, state
);
3451 case -NFS4ERR_STALE_CLIENTID
:
3452 case -NFS4ERR_EXPIRED
:
3453 goto do_state_recovery
;
3454 #if defined(CONFIG_NFS_V4_1)
3455 case -NFS4ERR_BADSESSION
:
3456 case -NFS4ERR_BADSLOT
:
3457 case -NFS4ERR_BAD_HIGH_SLOT
:
3458 case -NFS4ERR_DEADSESSION
:
3459 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
3460 case -NFS4ERR_SEQ_FALSE_RETRY
:
3461 case -NFS4ERR_SEQ_MISORDERED
:
3462 dprintk("%s ERROR %d, Reset session\n", __func__
,
3464 nfs4_schedule_state_recovery(clp
);
3465 task
->tk_status
= 0;
3467 #endif /* CONFIG_NFS_V4_1 */
3468 case -NFS4ERR_DELAY
:
3470 nfs_inc_server_stats(server
, NFSIOS_DELAY
);
3471 case -NFS4ERR_GRACE
:
3473 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
3474 task
->tk_status
= 0;
3476 case -NFS4ERR_OLD_STATEID
:
3477 task
->tk_status
= 0;
3480 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
3483 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
);
3484 nfs4_schedule_state_recovery(clp
);
3485 if (test_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) == 0)
3486 rpc_wake_up_queued_task(&clp
->cl_rpcwaitq
, task
);
3487 task
->tk_status
= 0;
3492 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs4_state
*state
)
3494 return _nfs4_async_handle_error(task
, server
, server
->nfs_client
, state
);
3497 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
3499 nfs4_verifier sc_verifier
;
3500 struct nfs4_setclientid setclientid
= {
3501 .sc_verifier
= &sc_verifier
,
3504 struct rpc_message msg
= {
3505 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
3506 .rpc_argp
= &setclientid
,
3514 p
= (__be32
*)sc_verifier
.data
;
3515 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
3516 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
3519 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
3520 sizeof(setclientid
.sc_name
), "%s/%s %s %s %u",
3522 rpc_peeraddr2str(clp
->cl_rpcclient
,
3524 rpc_peeraddr2str(clp
->cl_rpcclient
,
3526 clp
->cl_rpcclient
->cl_auth
->au_ops
->au_name
,
3527 clp
->cl_id_uniquifier
);
3528 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
3529 sizeof(setclientid
.sc_netid
),
3530 rpc_peeraddr2str(clp
->cl_rpcclient
,
3531 RPC_DISPLAY_NETID
));
3532 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
3533 sizeof(setclientid
.sc_uaddr
), "%s.%u.%u",
3534 clp
->cl_ipaddr
, port
>> 8, port
& 255);
3536 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3537 if (status
!= -NFS4ERR_CLID_INUSE
)
3542 ssleep(clp
->cl_lease_time
+ 1);
3544 if (++clp
->cl_id_uniquifier
== 0)
3550 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3552 struct nfs_fsinfo fsinfo
;
3553 struct rpc_message msg
= {
3554 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
3556 .rpc_resp
= &fsinfo
,
3563 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3565 spin_lock(&clp
->cl_lock
);
3566 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
3567 clp
->cl_last_renewal
= now
;
3568 spin_unlock(&clp
->cl_lock
);
3573 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3578 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
3582 case -NFS4ERR_RESOURCE
:
3583 /* The IBM lawyers misread another document! */
3584 case -NFS4ERR_DELAY
:
3586 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
3592 struct nfs4_delegreturndata
{
3593 struct nfs4_delegreturnargs args
;
3594 struct nfs4_delegreturnres res
;
3596 nfs4_stateid stateid
;
3597 unsigned long timestamp
;
3598 struct nfs_fattr fattr
;
3602 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3604 struct nfs4_delegreturndata
*data
= calldata
;
3606 nfs4_sequence_done(data
->res
.server
, &data
->res
.seq_res
,
3609 switch (task
->tk_status
) {
3610 case -NFS4ERR_STALE_STATEID
:
3611 case -NFS4ERR_EXPIRED
:
3613 renew_lease(data
->res
.server
, data
->timestamp
);
3616 if (nfs4_async_handle_error(task
, data
->res
.server
, NULL
) ==
3618 nfs_restart_rpc(task
, data
->res
.server
->nfs_client
);
3622 data
->rpc_status
= task
->tk_status
;
3625 static void nfs4_delegreturn_release(void *calldata
)
3630 #if defined(CONFIG_NFS_V4_1)
3631 static void nfs4_delegreturn_prepare(struct rpc_task
*task
, void *data
)
3633 struct nfs4_delegreturndata
*d_data
;
3635 d_data
= (struct nfs4_delegreturndata
*)data
;
3637 if (nfs4_setup_sequence(d_data
->res
.server
->nfs_client
,
3638 &d_data
->args
.seq_args
,
3639 &d_data
->res
.seq_res
, 1, task
))
3641 rpc_call_start(task
);
3643 #endif /* CONFIG_NFS_V4_1 */
3645 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3646 #if defined(CONFIG_NFS_V4_1)
3647 .rpc_call_prepare
= nfs4_delegreturn_prepare
,
3648 #endif /* CONFIG_NFS_V4_1 */
3649 .rpc_call_done
= nfs4_delegreturn_done
,
3650 .rpc_release
= nfs4_delegreturn_release
,
3653 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3655 struct nfs4_delegreturndata
*data
;
3656 struct nfs_server
*server
= NFS_SERVER(inode
);
3657 struct rpc_task
*task
;
3658 struct rpc_message msg
= {
3659 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3662 struct rpc_task_setup task_setup_data
= {
3663 .rpc_client
= server
->client
,
3664 .rpc_message
= &msg
,
3665 .callback_ops
= &nfs4_delegreturn_ops
,
3666 .flags
= RPC_TASK_ASYNC
,
3670 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
3673 data
->args
.fhandle
= &data
->fh
;
3674 data
->args
.stateid
= &data
->stateid
;
3675 data
->args
.bitmask
= server
->attr_bitmask
;
3676 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3677 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3678 data
->res
.fattr
= &data
->fattr
;
3679 data
->res
.server
= server
;
3680 data
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3681 nfs_fattr_init(data
->res
.fattr
);
3682 data
->timestamp
= jiffies
;
3683 data
->rpc_status
= 0;
3685 task_setup_data
.callback_data
= data
;
3686 msg
.rpc_argp
= &data
->args
,
3687 msg
.rpc_resp
= &data
->res
,
3688 task
= rpc_run_task(&task_setup_data
);
3690 return PTR_ERR(task
);
3693 status
= nfs4_wait_for_completion_rpc_task(task
);
3696 status
= data
->rpc_status
;
3699 nfs_refresh_inode(inode
, &data
->fattr
);
3705 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3707 struct nfs_server
*server
= NFS_SERVER(inode
);
3708 struct nfs4_exception exception
= { };
3711 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
, issync
);
3713 case -NFS4ERR_STALE_STATEID
:
3714 case -NFS4ERR_EXPIRED
:
3718 err
= nfs4_handle_exception(server
, err
, &exception
);
3719 } while (exception
.retry
);
3723 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3724 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3727 * sleep, with exponential backoff, and retry the LOCK operation.
3729 static unsigned long
3730 nfs4_set_lock_task_retry(unsigned long timeout
)
3732 schedule_timeout_killable(timeout
);
3734 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3735 return NFS4_LOCK_MAXTIMEOUT
;
3739 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3741 struct inode
*inode
= state
->inode
;
3742 struct nfs_server
*server
= NFS_SERVER(inode
);
3743 struct nfs_client
*clp
= server
->nfs_client
;
3744 struct nfs_lockt_args arg
= {
3745 .fh
= NFS_FH(inode
),
3748 struct nfs_lockt_res res
= {
3751 struct rpc_message msg
= {
3752 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3755 .rpc_cred
= state
->owner
->so_cred
,
3757 struct nfs4_lock_state
*lsp
;
3760 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3761 status
= nfs4_set_lock_state(state
, request
);
3764 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3765 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3766 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
3769 request
->fl_type
= F_UNLCK
;
3771 case -NFS4ERR_DENIED
:
3774 request
->fl_ops
->fl_release_private(request
);
3779 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3781 struct nfs4_exception exception
= { };
3785 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3786 _nfs4_proc_getlk(state
, cmd
, request
),
3788 } while (exception
.retry
);
3792 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3795 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3797 res
= posix_lock_file_wait(file
, fl
);
3800 res
= flock_lock_file_wait(file
, fl
);
3808 struct nfs4_unlockdata
{
3809 struct nfs_locku_args arg
;
3810 struct nfs_locku_res res
;
3811 struct nfs4_lock_state
*lsp
;
3812 struct nfs_open_context
*ctx
;
3813 struct file_lock fl
;
3814 const struct nfs_server
*server
;
3815 unsigned long timestamp
;
3818 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3819 struct nfs_open_context
*ctx
,
3820 struct nfs4_lock_state
*lsp
,
3821 struct nfs_seqid
*seqid
)
3823 struct nfs4_unlockdata
*p
;
3824 struct inode
*inode
= lsp
->ls_state
->inode
;
3826 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3829 p
->arg
.fh
= NFS_FH(inode
);
3831 p
->arg
.seqid
= seqid
;
3832 p
->res
.seqid
= seqid
;
3833 p
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3834 p
->arg
.stateid
= &lsp
->ls_stateid
;
3836 atomic_inc(&lsp
->ls_count
);
3837 /* Ensure we don't close file until we're done freeing locks! */
3838 p
->ctx
= get_nfs_open_context(ctx
);
3839 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3840 p
->server
= NFS_SERVER(inode
);
3844 static void nfs4_locku_release_calldata(void *data
)
3846 struct nfs4_unlockdata
*calldata
= data
;
3847 nfs_free_seqid(calldata
->arg
.seqid
);
3848 nfs4_put_lock_state(calldata
->lsp
);
3849 put_nfs_open_context(calldata
->ctx
);
3853 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3855 struct nfs4_unlockdata
*calldata
= data
;
3857 nfs4_sequence_done(calldata
->server
, &calldata
->res
.seq_res
,
3859 if (RPC_ASSASSINATED(task
))
3861 switch (task
->tk_status
) {
3863 memcpy(calldata
->lsp
->ls_stateid
.data
,
3864 calldata
->res
.stateid
.data
,
3865 sizeof(calldata
->lsp
->ls_stateid
.data
));
3866 renew_lease(calldata
->server
, calldata
->timestamp
);
3868 case -NFS4ERR_BAD_STATEID
:
3869 case -NFS4ERR_OLD_STATEID
:
3870 case -NFS4ERR_STALE_STATEID
:
3871 case -NFS4ERR_EXPIRED
:
3874 if (nfs4_async_handle_error(task
, calldata
->server
, NULL
) == -EAGAIN
)
3875 nfs_restart_rpc(task
,
3876 calldata
->server
->nfs_client
);
3880 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3882 struct nfs4_unlockdata
*calldata
= data
;
3884 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3886 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3887 /* Note: exit _without_ running nfs4_locku_done */
3888 task
->tk_action
= NULL
;
3891 calldata
->timestamp
= jiffies
;
3892 if (nfs4_setup_sequence(calldata
->server
->nfs_client
,
3893 &calldata
->arg
.seq_args
,
3894 &calldata
->res
.seq_res
, 1, task
))
3896 rpc_call_start(task
);
3899 static const struct rpc_call_ops nfs4_locku_ops
= {
3900 .rpc_call_prepare
= nfs4_locku_prepare
,
3901 .rpc_call_done
= nfs4_locku_done
,
3902 .rpc_release
= nfs4_locku_release_calldata
,
3905 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3906 struct nfs_open_context
*ctx
,
3907 struct nfs4_lock_state
*lsp
,
3908 struct nfs_seqid
*seqid
)
3910 struct nfs4_unlockdata
*data
;
3911 struct rpc_message msg
= {
3912 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3913 .rpc_cred
= ctx
->cred
,
3915 struct rpc_task_setup task_setup_data
= {
3916 .rpc_client
= NFS_CLIENT(lsp
->ls_state
->inode
),
3917 .rpc_message
= &msg
,
3918 .callback_ops
= &nfs4_locku_ops
,
3919 .workqueue
= nfsiod_workqueue
,
3920 .flags
= RPC_TASK_ASYNC
,
3923 /* Ensure this is an unlock - when canceling a lock, the
3924 * canceled lock is passed in, and it won't be an unlock.
3926 fl
->fl_type
= F_UNLCK
;
3928 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3930 nfs_free_seqid(seqid
);
3931 return ERR_PTR(-ENOMEM
);
3934 msg
.rpc_argp
= &data
->arg
,
3935 msg
.rpc_resp
= &data
->res
,
3936 task_setup_data
.callback_data
= data
;
3937 return rpc_run_task(&task_setup_data
);
3940 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3942 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3943 struct nfs_seqid
*seqid
;
3944 struct nfs4_lock_state
*lsp
;
3945 struct rpc_task
*task
;
3947 unsigned char fl_flags
= request
->fl_flags
;
3949 status
= nfs4_set_lock_state(state
, request
);
3950 /* Unlock _before_ we do the RPC call */
3951 request
->fl_flags
|= FL_EXISTS
;
3952 down_read(&nfsi
->rwsem
);
3953 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
) {
3954 up_read(&nfsi
->rwsem
);
3957 up_read(&nfsi
->rwsem
);
3960 /* Is this a delegated lock? */
3961 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3963 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3964 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3968 task
= nfs4_do_unlck(request
, nfs_file_open_context(request
->fl_file
), lsp
, seqid
);
3969 status
= PTR_ERR(task
);
3972 status
= nfs4_wait_for_completion_rpc_task(task
);
3975 request
->fl_flags
= fl_flags
;
3979 struct nfs4_lockdata
{
3980 struct nfs_lock_args arg
;
3981 struct nfs_lock_res res
;
3982 struct nfs4_lock_state
*lsp
;
3983 struct nfs_open_context
*ctx
;
3984 struct file_lock fl
;
3985 unsigned long timestamp
;
3988 struct nfs_server
*server
;
3991 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
3992 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
3994 struct nfs4_lockdata
*p
;
3995 struct inode
*inode
= lsp
->ls_state
->inode
;
3996 struct nfs_server
*server
= NFS_SERVER(inode
);
3998 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
4002 p
->arg
.fh
= NFS_FH(inode
);
4004 p
->arg
.open_seqid
= nfs_alloc_seqid(&lsp
->ls_state
->owner
->so_seqid
);
4005 if (p
->arg
.open_seqid
== NULL
)
4007 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
4008 if (p
->arg
.lock_seqid
== NULL
)
4009 goto out_free_seqid
;
4010 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
4011 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
4012 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
4013 p
->res
.lock_seqid
= p
->arg
.lock_seqid
;
4014 p
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
4017 atomic_inc(&lsp
->ls_count
);
4018 p
->ctx
= get_nfs_open_context(ctx
);
4019 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
4022 nfs_free_seqid(p
->arg
.open_seqid
);
4028 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
4030 struct nfs4_lockdata
*data
= calldata
;
4031 struct nfs4_state
*state
= data
->lsp
->ls_state
;
4033 dprintk("%s: begin!\n", __func__
);
4034 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
4036 /* Do we need to do an open_to_lock_owner? */
4037 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
4038 if (nfs_wait_on_sequence(data
->arg
.open_seqid
, task
) != 0)
4040 data
->arg
.open_stateid
= &state
->stateid
;
4041 data
->arg
.new_lock_owner
= 1;
4042 data
->res
.open_seqid
= data
->arg
.open_seqid
;
4044 data
->arg
.new_lock_owner
= 0;
4045 data
->timestamp
= jiffies
;
4046 if (nfs4_setup_sequence(data
->server
->nfs_client
, &data
->arg
.seq_args
,
4047 &data
->res
.seq_res
, 1, task
))
4049 rpc_call_start(task
);
4050 dprintk("%s: done!, ret = %d\n", __func__
, data
->rpc_status
);
4053 static void nfs4_recover_lock_prepare(struct rpc_task
*task
, void *calldata
)
4055 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
4056 nfs4_lock_prepare(task
, calldata
);
4059 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
4061 struct nfs4_lockdata
*data
= calldata
;
4063 dprintk("%s: begin!\n", __func__
);
4065 nfs4_sequence_done(data
->server
, &data
->res
.seq_res
,
4068 data
->rpc_status
= task
->tk_status
;
4069 if (RPC_ASSASSINATED(task
))
4071 if (data
->arg
.new_lock_owner
!= 0) {
4072 if (data
->rpc_status
== 0)
4073 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
4077 if (data
->rpc_status
== 0) {
4078 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
4079 sizeof(data
->lsp
->ls_stateid
.data
));
4080 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
4081 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
4084 dprintk("%s: done, ret = %d!\n", __func__
, data
->rpc_status
);
4087 static void nfs4_lock_release(void *calldata
)
4089 struct nfs4_lockdata
*data
= calldata
;
4091 dprintk("%s: begin!\n", __func__
);
4092 nfs_free_seqid(data
->arg
.open_seqid
);
4093 if (data
->cancelled
!= 0) {
4094 struct rpc_task
*task
;
4095 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
4096 data
->arg
.lock_seqid
);
4099 dprintk("%s: cancelling lock!\n", __func__
);
4101 nfs_free_seqid(data
->arg
.lock_seqid
);
4102 nfs4_put_lock_state(data
->lsp
);
4103 put_nfs_open_context(data
->ctx
);
4105 dprintk("%s: done!\n", __func__
);
4108 static const struct rpc_call_ops nfs4_lock_ops
= {
4109 .rpc_call_prepare
= nfs4_lock_prepare
,
4110 .rpc_call_done
= nfs4_lock_done
,
4111 .rpc_release
= nfs4_lock_release
,
4114 static const struct rpc_call_ops nfs4_recover_lock_ops
= {
4115 .rpc_call_prepare
= nfs4_recover_lock_prepare
,
4116 .rpc_call_done
= nfs4_lock_done
,
4117 .rpc_release
= nfs4_lock_release
,
4120 static void nfs4_handle_setlk_error(struct nfs_server
*server
, struct nfs4_lock_state
*lsp
, int new_lock_owner
, int error
)
4122 struct nfs_client
*clp
= server
->nfs_client
;
4123 struct nfs4_state
*state
= lsp
->ls_state
;
4126 case -NFS4ERR_ADMIN_REVOKED
:
4127 case -NFS4ERR_BAD_STATEID
:
4128 case -NFS4ERR_EXPIRED
:
4129 if (new_lock_owner
!= 0 ||
4130 (lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) != 0)
4131 nfs4_state_mark_reclaim_nograce(clp
, state
);
4132 lsp
->ls_seqid
.flags
&= ~NFS_SEQID_CONFIRMED
;
4134 case -NFS4ERR_STALE_STATEID
:
4135 if (new_lock_owner
!= 0 ||
4136 (lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) != 0)
4137 nfs4_state_mark_reclaim_reboot(clp
, state
);
4138 lsp
->ls_seqid
.flags
&= ~NFS_SEQID_CONFIRMED
;
4142 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int recovery_type
)
4144 struct nfs4_lockdata
*data
;
4145 struct rpc_task
*task
;
4146 struct rpc_message msg
= {
4147 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
4148 .rpc_cred
= state
->owner
->so_cred
,
4150 struct rpc_task_setup task_setup_data
= {
4151 .rpc_client
= NFS_CLIENT(state
->inode
),
4152 .rpc_message
= &msg
,
4153 .callback_ops
= &nfs4_lock_ops
,
4154 .workqueue
= nfsiod_workqueue
,
4155 .flags
= RPC_TASK_ASYNC
,
4159 dprintk("%s: begin!\n", __func__
);
4160 data
= nfs4_alloc_lockdata(fl
, nfs_file_open_context(fl
->fl_file
),
4161 fl
->fl_u
.nfs4_fl
.owner
);
4165 data
->arg
.block
= 1;
4166 if (recovery_type
> NFS_LOCK_NEW
) {
4167 if (recovery_type
== NFS_LOCK_RECLAIM
)
4168 data
->arg
.reclaim
= NFS_LOCK_RECLAIM
;
4169 task_setup_data
.callback_ops
= &nfs4_recover_lock_ops
;
4171 msg
.rpc_argp
= &data
->arg
,
4172 msg
.rpc_resp
= &data
->res
,
4173 task_setup_data
.callback_data
= data
;
4174 task
= rpc_run_task(&task_setup_data
);
4176 return PTR_ERR(task
);
4177 ret
= nfs4_wait_for_completion_rpc_task(task
);
4179 ret
= data
->rpc_status
;
4181 nfs4_handle_setlk_error(data
->server
, data
->lsp
,
4182 data
->arg
.new_lock_owner
, ret
);
4184 data
->cancelled
= 1;
4186 dprintk("%s: done, ret = %d!\n", __func__
, ret
);
4190 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
4192 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4193 struct nfs4_exception exception
= { };
4197 /* Cache the lock if possible... */
4198 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
4200 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, NFS_LOCK_RECLAIM
);
4201 if (err
!= -NFS4ERR_DELAY
&& err
!= -EKEYEXPIRED
)
4203 nfs4_handle_exception(server
, err
, &exception
);
4204 } while (exception
.retry
);
4208 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
4210 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4211 struct nfs4_exception exception
= { };
4214 err
= nfs4_set_lock_state(state
, request
);
4218 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
4220 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, NFS_LOCK_EXPIRED
);
4224 case -NFS4ERR_GRACE
:
4225 case -NFS4ERR_DELAY
:
4227 nfs4_handle_exception(server
, err
, &exception
);
4230 } while (exception
.retry
);
4235 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4237 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
4238 unsigned char fl_flags
= request
->fl_flags
;
4239 int status
= -ENOLCK
;
4241 if ((fl_flags
& FL_POSIX
) &&
4242 !test_bit(NFS_STATE_POSIX_LOCKS
, &state
->flags
))
4244 /* Is this a delegated open? */
4245 status
= nfs4_set_lock_state(state
, request
);
4248 request
->fl_flags
|= FL_ACCESS
;
4249 status
= do_vfs_lock(request
->fl_file
, request
);
4252 down_read(&nfsi
->rwsem
);
4253 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
4254 /* Yes: cache locks! */
4255 /* ...but avoid races with delegation recall... */
4256 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
4257 status
= do_vfs_lock(request
->fl_file
, request
);
4260 status
= _nfs4_do_setlk(state
, cmd
, request
, NFS_LOCK_NEW
);
4263 /* Note: we always want to sleep here! */
4264 request
->fl_flags
= fl_flags
| FL_SLEEP
;
4265 if (do_vfs_lock(request
->fl_file
, request
) < 0)
4266 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __func__
);
4268 up_read(&nfsi
->rwsem
);
4270 request
->fl_flags
= fl_flags
;
4274 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4276 struct nfs4_exception exception
= { };
4280 err
= _nfs4_proc_setlk(state
, cmd
, request
);
4281 if (err
== -NFS4ERR_DENIED
)
4283 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
4285 } while (exception
.retry
);
4290 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
4292 struct nfs_open_context
*ctx
;
4293 struct nfs4_state
*state
;
4294 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
4297 /* verify open state */
4298 ctx
= nfs_file_open_context(filp
);
4301 if (request
->fl_start
< 0 || request
->fl_end
< 0)
4304 if (IS_GETLK(cmd
)) {
4306 return nfs4_proc_getlk(state
, F_GETLK
, request
);
4310 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
4313 if (request
->fl_type
== F_UNLCK
) {
4315 return nfs4_proc_unlck(state
, cmd
, request
);
4322 status
= nfs4_proc_setlk(state
, cmd
, request
);
4323 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
4325 timeout
= nfs4_set_lock_task_retry(timeout
);
4326 status
= -ERESTARTSYS
;
4329 } while(status
< 0);
4333 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
4335 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4336 struct nfs4_exception exception
= { };
4339 err
= nfs4_set_lock_state(state
, fl
);
4343 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, NFS_LOCK_NEW
);
4346 printk(KERN_ERR
"%s: unhandled error %d.\n",
4351 case -NFS4ERR_EXPIRED
:
4352 case -NFS4ERR_STALE_CLIENTID
:
4353 case -NFS4ERR_STALE_STATEID
:
4354 case -NFS4ERR_BADSESSION
:
4355 case -NFS4ERR_BADSLOT
:
4356 case -NFS4ERR_BAD_HIGH_SLOT
:
4357 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
4358 case -NFS4ERR_DEADSESSION
:
4359 nfs4_schedule_state_recovery(server
->nfs_client
);
4363 * The show must go on: exit, but mark the
4364 * stateid as needing recovery.
4366 case -NFS4ERR_ADMIN_REVOKED
:
4367 case -NFS4ERR_BAD_STATEID
:
4368 case -NFS4ERR_OPENMODE
:
4369 nfs4_state_mark_reclaim_nograce(server
->nfs_client
, state
);
4373 case -NFS4ERR_DENIED
:
4374 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4377 case -NFS4ERR_DELAY
:
4381 err
= nfs4_handle_exception(server
, err
, &exception
);
4382 } while (exception
.retry
);
4387 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4389 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
4390 size_t buflen
, int flags
)
4392 struct inode
*inode
= dentry
->d_inode
;
4394 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
4397 return nfs4_proc_set_acl(inode
, buf
, buflen
);
4400 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4401 * and that's what we'll do for e.g. user attributes that haven't been set.
4402 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4403 * attributes in kernel-managed attribute namespaces. */
4404 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
4407 struct inode
*inode
= dentry
->d_inode
;
4409 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
4412 return nfs4_proc_get_acl(inode
, buf
, buflen
);
4415 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
4417 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
4419 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
4421 if (buf
&& buflen
< len
)
4424 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
4428 static void nfs_fixup_referral_attributes(struct nfs_fattr
*fattr
)
4430 if (!((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) &&
4431 (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
4432 (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)))
4435 fattr
->valid
|= NFS_ATTR_FATTR_TYPE
| NFS_ATTR_FATTR_MODE
|
4436 NFS_ATTR_FATTR_NLINK
;
4437 fattr
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
4441 int nfs4_proc_fs_locations(struct inode
*dir
, const struct qstr
*name
,
4442 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
4444 struct nfs_server
*server
= NFS_SERVER(dir
);
4446 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
4447 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
4449 struct nfs4_fs_locations_arg args
= {
4450 .dir_fh
= NFS_FH(dir
),
4455 struct nfs4_fs_locations_res res
= {
4456 .fs_locations
= fs_locations
,
4458 struct rpc_message msg
= {
4459 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
4465 dprintk("%s: start\n", __func__
);
4466 nfs_fattr_init(&fs_locations
->fattr
);
4467 fs_locations
->server
= server
;
4468 fs_locations
->nlocations
= 0;
4469 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
4470 nfs_fixup_referral_attributes(&fs_locations
->fattr
);
4471 dprintk("%s: returned status = %d\n", __func__
, status
);
4475 #ifdef CONFIG_NFS_V4_1
4477 * nfs4_proc_exchange_id()
4479 * Since the clientid has expired, all compounds using sessions
4480 * associated with the stale clientid will be returning
4481 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4482 * be in some phase of session reset.
4484 int nfs4_proc_exchange_id(struct nfs_client
*clp
, struct rpc_cred
*cred
)
4486 nfs4_verifier verifier
;
4487 struct nfs41_exchange_id_args args
= {
4489 .flags
= clp
->cl_exchange_flags
,
4491 struct nfs41_exchange_id_res res
= {
4495 struct rpc_message msg
= {
4496 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_EXCHANGE_ID
],
4503 dprintk("--> %s\n", __func__
);
4504 BUG_ON(clp
== NULL
);
4506 /* Remove server-only flags */
4507 args
.flags
&= ~EXCHGID4_FLAG_CONFIRMED_R
;
4509 p
= (u32
*)verifier
.data
;
4510 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
4511 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
4512 args
.verifier
= &verifier
;
4515 args
.id_len
= scnprintf(args
.id
, sizeof(args
.id
),
4518 rpc_peeraddr2str(clp
->cl_rpcclient
,
4520 clp
->cl_id_uniquifier
);
4522 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
4524 if (status
!= -NFS4ERR_CLID_INUSE
)
4530 if (++clp
->cl_id_uniquifier
== 0)
4534 dprintk("<-- %s status= %d\n", __func__
, status
);
4538 struct nfs4_get_lease_time_data
{
4539 struct nfs4_get_lease_time_args
*args
;
4540 struct nfs4_get_lease_time_res
*res
;
4541 struct nfs_client
*clp
;
4544 static void nfs4_get_lease_time_prepare(struct rpc_task
*task
,
4548 struct nfs4_get_lease_time_data
*data
=
4549 (struct nfs4_get_lease_time_data
*)calldata
;
4551 dprintk("--> %s\n", __func__
);
4552 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
4553 /* just setup sequence, do not trigger session recovery
4554 since we're invoked within one */
4555 ret
= nfs41_setup_sequence(data
->clp
->cl_session
,
4556 &data
->args
->la_seq_args
,
4557 &data
->res
->lr_seq_res
, 0, task
);
4559 BUG_ON(ret
== -EAGAIN
);
4560 rpc_call_start(task
);
4561 dprintk("<-- %s\n", __func__
);
4565 * Called from nfs4_state_manager thread for session setup, so don't recover
4566 * from sequence operation or clientid errors.
4568 static void nfs4_get_lease_time_done(struct rpc_task
*task
, void *calldata
)
4570 struct nfs4_get_lease_time_data
*data
=
4571 (struct nfs4_get_lease_time_data
*)calldata
;
4573 dprintk("--> %s\n", __func__
);
4574 nfs41_sequence_done(data
->clp
, &data
->res
->lr_seq_res
, task
->tk_status
);
4575 switch (task
->tk_status
) {
4576 case -NFS4ERR_DELAY
:
4577 case -NFS4ERR_GRACE
:
4579 dprintk("%s Retry: tk_status %d\n", __func__
, task
->tk_status
);
4580 rpc_delay(task
, NFS4_POLL_RETRY_MIN
);
4581 task
->tk_status
= 0;
4582 nfs_restart_rpc(task
, data
->clp
);
4585 dprintk("<-- %s\n", __func__
);
4588 struct rpc_call_ops nfs4_get_lease_time_ops
= {
4589 .rpc_call_prepare
= nfs4_get_lease_time_prepare
,
4590 .rpc_call_done
= nfs4_get_lease_time_done
,
4593 int nfs4_proc_get_lease_time(struct nfs_client
*clp
, struct nfs_fsinfo
*fsinfo
)
4595 struct rpc_task
*task
;
4596 struct nfs4_get_lease_time_args args
;
4597 struct nfs4_get_lease_time_res res
= {
4598 .lr_fsinfo
= fsinfo
,
4600 struct nfs4_get_lease_time_data data
= {
4605 struct rpc_message msg
= {
4606 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GET_LEASE_TIME
],
4610 struct rpc_task_setup task_setup
= {
4611 .rpc_client
= clp
->cl_rpcclient
,
4612 .rpc_message
= &msg
,
4613 .callback_ops
= &nfs4_get_lease_time_ops
,
4614 .callback_data
= &data
4618 res
.lr_seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
4619 dprintk("--> %s\n", __func__
);
4620 task
= rpc_run_task(&task_setup
);
4623 status
= PTR_ERR(task
);
4625 status
= task
->tk_status
;
4628 dprintk("<-- %s return %d\n", __func__
, status
);
4634 * Reset a slot table
4636 static int nfs4_reset_slot_table(struct nfs4_slot_table
*tbl
, u32 max_reqs
,
4639 struct nfs4_slot
*new = NULL
;
4643 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__
,
4644 max_reqs
, tbl
->max_slots
);
4646 /* Does the newly negotiated max_reqs match the existing slot table? */
4647 if (max_reqs
!= tbl
->max_slots
) {
4649 new = kmalloc(max_reqs
* sizeof(struct nfs4_slot
),
4656 spin_lock(&tbl
->slot_tbl_lock
);
4659 tbl
->max_slots
= max_reqs
;
4661 for (i
= 0; i
< tbl
->max_slots
; ++i
)
4662 tbl
->slots
[i
].seq_nr
= ivalue
;
4663 spin_unlock(&tbl
->slot_tbl_lock
);
4664 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__
,
4665 tbl
, tbl
->slots
, tbl
->max_slots
);
4667 dprintk("<-- %s: return %d\n", __func__
, ret
);
4672 * Reset the forechannel and backchannel slot tables
4674 static int nfs4_reset_slot_tables(struct nfs4_session
*session
)
4678 status
= nfs4_reset_slot_table(&session
->fc_slot_table
,
4679 session
->fc_attrs
.max_reqs
, 1);
4683 status
= nfs4_reset_slot_table(&session
->bc_slot_table
,
4684 session
->bc_attrs
.max_reqs
, 0);
4688 /* Destroy the slot table */
4689 static void nfs4_destroy_slot_tables(struct nfs4_session
*session
)
4691 if (session
->fc_slot_table
.slots
!= NULL
) {
4692 kfree(session
->fc_slot_table
.slots
);
4693 session
->fc_slot_table
.slots
= NULL
;
4695 if (session
->bc_slot_table
.slots
!= NULL
) {
4696 kfree(session
->bc_slot_table
.slots
);
4697 session
->bc_slot_table
.slots
= NULL
;
4703 * Initialize slot table
4705 static int nfs4_init_slot_table(struct nfs4_slot_table
*tbl
,
4706 int max_slots
, int ivalue
)
4708 struct nfs4_slot
*slot
;
4711 BUG_ON(max_slots
> NFS4_MAX_SLOT_TABLE
);
4713 dprintk("--> %s: max_reqs=%u\n", __func__
, max_slots
);
4715 slot
= kcalloc(max_slots
, sizeof(struct nfs4_slot
), GFP_KERNEL
);
4720 spin_lock(&tbl
->slot_tbl_lock
);
4721 tbl
->max_slots
= max_slots
;
4723 tbl
->highest_used_slotid
= -1; /* no slot is currently used */
4724 spin_unlock(&tbl
->slot_tbl_lock
);
4725 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__
,
4726 tbl
, tbl
->slots
, tbl
->max_slots
);
4728 dprintk("<-- %s: return %d\n", __func__
, ret
);
4733 * Initialize the forechannel and backchannel tables
4735 static int nfs4_init_slot_tables(struct nfs4_session
*session
)
4737 struct nfs4_slot_table
*tbl
;
4740 tbl
= &session
->fc_slot_table
;
4741 if (tbl
->slots
== NULL
) {
4742 status
= nfs4_init_slot_table(tbl
,
4743 session
->fc_attrs
.max_reqs
, 1);
4748 tbl
= &session
->bc_slot_table
;
4749 if (tbl
->slots
== NULL
) {
4750 status
= nfs4_init_slot_table(tbl
,
4751 session
->bc_attrs
.max_reqs
, 0);
4753 nfs4_destroy_slot_tables(session
);
4759 struct nfs4_session
*nfs4_alloc_session(struct nfs_client
*clp
)
4761 struct nfs4_session
*session
;
4762 struct nfs4_slot_table
*tbl
;
4764 session
= kzalloc(sizeof(struct nfs4_session
), GFP_KERNEL
);
4769 * The create session reply races with the server back
4770 * channel probe. Mark the client NFS_CS_SESSION_INITING
4771 * so that the client back channel can find the
4774 clp
->cl_cons_state
= NFS_CS_SESSION_INITING
;
4775 init_completion(&session
->complete
);
4777 tbl
= &session
->fc_slot_table
;
4778 tbl
->highest_used_slotid
= -1;
4779 spin_lock_init(&tbl
->slot_tbl_lock
);
4780 rpc_init_priority_wait_queue(&tbl
->slot_tbl_waitq
, "ForeChannel Slot table");
4782 tbl
= &session
->bc_slot_table
;
4783 tbl
->highest_used_slotid
= -1;
4784 spin_lock_init(&tbl
->slot_tbl_lock
);
4785 rpc_init_wait_queue(&tbl
->slot_tbl_waitq
, "BackChannel Slot table");
4791 void nfs4_destroy_session(struct nfs4_session
*session
)
4793 nfs4_proc_destroy_session(session
);
4794 dprintk("%s Destroy backchannel for xprt %p\n",
4795 __func__
, session
->clp
->cl_rpcclient
->cl_xprt
);
4796 xprt_destroy_backchannel(session
->clp
->cl_rpcclient
->cl_xprt
,
4797 NFS41_BC_MIN_CALLBACKS
);
4798 nfs4_destroy_slot_tables(session
);
4803 * Initialize the values to be used by the client in CREATE_SESSION
4804 * If nfs4_init_session set the fore channel request and response sizes,
4807 * Set the back channel max_resp_sz_cached to zero to force the client to
4808 * always set csa_cachethis to FALSE because the current implementation
4809 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4811 static void nfs4_init_channel_attrs(struct nfs41_create_session_args
*args
)
4813 struct nfs4_session
*session
= args
->client
->cl_session
;
4814 unsigned int mxrqst_sz
= session
->fc_attrs
.max_rqst_sz
,
4815 mxresp_sz
= session
->fc_attrs
.max_resp_sz
;
4818 mxrqst_sz
= NFS_MAX_FILE_IO_SIZE
;
4820 mxresp_sz
= NFS_MAX_FILE_IO_SIZE
;
4821 /* Fore channel attributes */
4822 args
->fc_attrs
.headerpadsz
= 0;
4823 args
->fc_attrs
.max_rqst_sz
= mxrqst_sz
;
4824 args
->fc_attrs
.max_resp_sz
= mxresp_sz
;
4825 args
->fc_attrs
.max_ops
= NFS4_MAX_OPS
;
4826 args
->fc_attrs
.max_reqs
= session
->clp
->cl_rpcclient
->cl_xprt
->max_reqs
;
4828 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4829 "max_ops=%u max_reqs=%u\n",
4831 args
->fc_attrs
.max_rqst_sz
, args
->fc_attrs
.max_resp_sz
,
4832 args
->fc_attrs
.max_ops
, args
->fc_attrs
.max_reqs
);
4834 /* Back channel attributes */
4835 args
->bc_attrs
.headerpadsz
= 0;
4836 args
->bc_attrs
.max_rqst_sz
= PAGE_SIZE
;
4837 args
->bc_attrs
.max_resp_sz
= PAGE_SIZE
;
4838 args
->bc_attrs
.max_resp_sz_cached
= 0;
4839 args
->bc_attrs
.max_ops
= NFS4_MAX_BACK_CHANNEL_OPS
;
4840 args
->bc_attrs
.max_reqs
= 1;
4842 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4843 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4845 args
->bc_attrs
.max_rqst_sz
, args
->bc_attrs
.max_resp_sz
,
4846 args
->bc_attrs
.max_resp_sz_cached
, args
->bc_attrs
.max_ops
,
4847 args
->bc_attrs
.max_reqs
);
4850 static int _verify_channel_attr(char *chan
, char *attr_name
, u32 sent
, u32 rcvd
)
4854 printk(KERN_WARNING
"%s: Session INVALID: %s channel %s increased. "
4855 "sent=%u rcvd=%u\n", __func__
, chan
, attr_name
, sent
, rcvd
);
4859 #define _verify_fore_channel_attr(_name_) \
4860 _verify_channel_attr("fore", #_name_, \
4861 args->fc_attrs._name_, \
4862 session->fc_attrs._name_)
4864 #define _verify_back_channel_attr(_name_) \
4865 _verify_channel_attr("back", #_name_, \
4866 args->bc_attrs._name_, \
4867 session->bc_attrs._name_)
4870 * The server is not allowed to increase the fore channel header pad size,
4871 * maximum response size, or maximum number of operations.
4873 * The back channel attributes are only negotiatied down: We send what the
4874 * (back channel) server insists upon.
4876 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args
*args
,
4877 struct nfs4_session
*session
)
4881 ret
|= _verify_fore_channel_attr(headerpadsz
);
4882 ret
|= _verify_fore_channel_attr(max_resp_sz
);
4883 ret
|= _verify_fore_channel_attr(max_ops
);
4885 ret
|= _verify_back_channel_attr(headerpadsz
);
4886 ret
|= _verify_back_channel_attr(max_rqst_sz
);
4887 ret
|= _verify_back_channel_attr(max_resp_sz
);
4888 ret
|= _verify_back_channel_attr(max_resp_sz_cached
);
4889 ret
|= _verify_back_channel_attr(max_ops
);
4890 ret
|= _verify_back_channel_attr(max_reqs
);
4895 static int _nfs4_proc_create_session(struct nfs_client
*clp
)
4897 struct nfs4_session
*session
= clp
->cl_session
;
4898 struct nfs41_create_session_args args
= {
4900 .cb_program
= NFS4_CALLBACK
,
4902 struct nfs41_create_session_res res
= {
4905 struct rpc_message msg
= {
4906 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE_SESSION
],
4912 nfs4_init_channel_attrs(&args
);
4913 args
.flags
= (SESSION4_PERSIST
| SESSION4_BACK_CHAN
);
4915 status
= rpc_call_sync(session
->clp
->cl_rpcclient
, &msg
, 0);
4918 /* Verify the session's negotiated channel_attrs values */
4919 status
= nfs4_verify_channel_attrs(&args
, session
);
4921 /* Increment the clientid slot sequence id */
4929 * Issues a CREATE_SESSION operation to the server.
4930 * It is the responsibility of the caller to verify the session is
4931 * expired before calling this routine.
4933 int nfs4_proc_create_session(struct nfs_client
*clp
)
4937 struct nfs4_session
*session
= clp
->cl_session
;
4939 dprintk("--> %s clp=%p session=%p\n", __func__
, clp
, session
);
4941 status
= _nfs4_proc_create_session(clp
);
4945 /* Init and reset the fore channel */
4946 status
= nfs4_init_slot_tables(session
);
4947 dprintk("slot table initialization returned %d\n", status
);
4950 status
= nfs4_reset_slot_tables(session
);
4951 dprintk("slot table reset returned %d\n", status
);
4955 ptr
= (unsigned *)&session
->sess_id
.data
[0];
4956 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__
,
4957 clp
->cl_seqid
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
4959 dprintk("<-- %s\n", __func__
);
4964 * Issue the over-the-wire RPC DESTROY_SESSION.
4965 * The caller must serialize access to this routine.
4967 int nfs4_proc_destroy_session(struct nfs4_session
*session
)
4970 struct rpc_message msg
;
4972 dprintk("--> nfs4_proc_destroy_session\n");
4974 /* session is still being setup */
4975 if (session
->clp
->cl_cons_state
!= NFS_CS_READY
)
4978 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DESTROY_SESSION
];
4979 msg
.rpc_argp
= session
;
4980 msg
.rpc_resp
= NULL
;
4981 msg
.rpc_cred
= NULL
;
4982 status
= rpc_call_sync(session
->clp
->cl_rpcclient
, &msg
, 0);
4986 "Got error %d from the server on DESTROY_SESSION. "
4987 "Session has been destroyed regardless...\n", status
);
4989 dprintk("<-- nfs4_proc_destroy_session\n");
4993 int nfs4_init_session(struct nfs_server
*server
)
4995 struct nfs_client
*clp
= server
->nfs_client
;
4996 struct nfs4_session
*session
;
4997 unsigned int rsize
, wsize
;
5000 if (!nfs4_has_session(clp
))
5003 rsize
= server
->rsize
;
5005 rsize
= NFS_MAX_FILE_IO_SIZE
;
5006 wsize
= server
->wsize
;
5008 wsize
= NFS_MAX_FILE_IO_SIZE
;
5010 session
= clp
->cl_session
;
5011 session
->fc_attrs
.max_rqst_sz
= wsize
+ nfs41_maxwrite_overhead
;
5012 session
->fc_attrs
.max_resp_sz
= rsize
+ nfs41_maxread_overhead
;
5014 ret
= nfs4_recover_expired_lease(server
);
5016 ret
= nfs4_check_client_ready(clp
);
5021 * Renew the cl_session lease.
5023 static int nfs4_proc_sequence(struct nfs_client
*clp
, struct rpc_cred
*cred
)
5025 struct nfs4_sequence_args args
;
5026 struct nfs4_sequence_res res
;
5028 struct rpc_message msg
= {
5029 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SEQUENCE
],
5035 args
.sa_cache_this
= 0;
5037 return nfs4_call_sync_sequence(clp
, clp
->cl_rpcclient
, &msg
, &args
,
5038 &res
, args
.sa_cache_this
, 1);
5041 static void nfs41_sequence_release(void *data
)
5043 struct nfs_client
*clp
= (struct nfs_client
*)data
;
5045 if (atomic_read(&clp
->cl_count
) > 1)
5046 nfs4_schedule_state_renewal(clp
);
5047 nfs_put_client(clp
);
5050 static void nfs41_sequence_call_done(struct rpc_task
*task
, void *data
)
5052 struct nfs_client
*clp
= (struct nfs_client
*)data
;
5054 nfs41_sequence_done(clp
, task
->tk_msg
.rpc_resp
, task
->tk_status
);
5056 if (task
->tk_status
< 0) {
5057 dprintk("%s ERROR %d\n", __func__
, task
->tk_status
);
5058 if (atomic_read(&clp
->cl_count
) == 1)
5061 if (_nfs4_async_handle_error(task
, NULL
, clp
, NULL
)
5063 nfs_restart_rpc(task
, clp
);
5067 dprintk("%s rpc_cred %p\n", __func__
, task
->tk_msg
.rpc_cred
);
5069 kfree(task
->tk_msg
.rpc_argp
);
5070 kfree(task
->tk_msg
.rpc_resp
);
5072 dprintk("<-- %s\n", __func__
);
5075 static void nfs41_sequence_prepare(struct rpc_task
*task
, void *data
)
5077 struct nfs_client
*clp
;
5078 struct nfs4_sequence_args
*args
;
5079 struct nfs4_sequence_res
*res
;
5081 clp
= (struct nfs_client
*)data
;
5082 args
= task
->tk_msg
.rpc_argp
;
5083 res
= task
->tk_msg
.rpc_resp
;
5085 if (nfs4_setup_sequence(clp
, args
, res
, 0, task
))
5087 rpc_call_start(task
);
5090 static const struct rpc_call_ops nfs41_sequence_ops
= {
5091 .rpc_call_done
= nfs41_sequence_call_done
,
5092 .rpc_call_prepare
= nfs41_sequence_prepare
,
5093 .rpc_release
= nfs41_sequence_release
,
5096 static int nfs41_proc_async_sequence(struct nfs_client
*clp
,
5097 struct rpc_cred
*cred
)
5099 struct nfs4_sequence_args
*args
;
5100 struct nfs4_sequence_res
*res
;
5101 struct rpc_message msg
= {
5102 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SEQUENCE
],
5106 if (!atomic_inc_not_zero(&clp
->cl_count
))
5108 args
= kzalloc(sizeof(*args
), GFP_KERNEL
);
5109 res
= kzalloc(sizeof(*res
), GFP_KERNEL
);
5110 if (!args
|| !res
) {
5113 nfs_put_client(clp
);
5116 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
5117 msg
.rpc_argp
= args
;
5120 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
5121 &nfs41_sequence_ops
, (void *)clp
);
5124 struct nfs4_reclaim_complete_data
{
5125 struct nfs_client
*clp
;
5126 struct nfs41_reclaim_complete_args arg
;
5127 struct nfs41_reclaim_complete_res res
;
5130 static void nfs4_reclaim_complete_prepare(struct rpc_task
*task
, void *data
)
5132 struct nfs4_reclaim_complete_data
*calldata
= data
;
5134 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
5135 if (nfs4_setup_sequence(calldata
->clp
, &calldata
->arg
.seq_args
,
5136 &calldata
->res
.seq_res
, 0, task
))
5139 rpc_call_start(task
);
5142 static void nfs4_reclaim_complete_done(struct rpc_task
*task
, void *data
)
5144 struct nfs4_reclaim_complete_data
*calldata
= data
;
5145 struct nfs_client
*clp
= calldata
->clp
;
5146 struct nfs4_sequence_res
*res
= &calldata
->res
.seq_res
;
5148 dprintk("--> %s\n", __func__
);
5149 nfs41_sequence_done(clp
, res
, task
->tk_status
);
5150 switch (task
->tk_status
) {
5152 case -NFS4ERR_COMPLETE_ALREADY
:
5154 case -NFS4ERR_BADSESSION
:
5155 case -NFS4ERR_DEADSESSION
:
5157 * Handle the session error, but do not retry the operation, as
5158 * we have no way of telling whether the clientid had to be
5159 * reset before we got our reply. If reset, a new wave of
5160 * reclaim operations will follow, containing their own reclaim
5161 * complete. We don't want our retry to get on the way of
5162 * recovery by incorrectly indicating to the server that we're
5163 * done reclaiming state since the process had to be restarted.
5165 _nfs4_async_handle_error(task
, NULL
, clp
, NULL
);
5168 if (_nfs4_async_handle_error(
5169 task
, NULL
, clp
, NULL
) == -EAGAIN
) {
5170 rpc_restart_call_prepare(task
);
5175 dprintk("<-- %s\n", __func__
);
5178 static void nfs4_free_reclaim_complete_data(void *data
)
5180 struct nfs4_reclaim_complete_data
*calldata
= data
;
5185 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops
= {
5186 .rpc_call_prepare
= nfs4_reclaim_complete_prepare
,
5187 .rpc_call_done
= nfs4_reclaim_complete_done
,
5188 .rpc_release
= nfs4_free_reclaim_complete_data
,
5192 * Issue a global reclaim complete.
5194 static int nfs41_proc_reclaim_complete(struct nfs_client
*clp
)
5196 struct nfs4_reclaim_complete_data
*calldata
;
5197 struct rpc_task
*task
;
5198 struct rpc_message msg
= {
5199 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RECLAIM_COMPLETE
],
5201 struct rpc_task_setup task_setup_data
= {
5202 .rpc_client
= clp
->cl_rpcclient
,
5203 .rpc_message
= &msg
,
5204 .callback_ops
= &nfs4_reclaim_complete_call_ops
,
5205 .flags
= RPC_TASK_ASYNC
,
5207 int status
= -ENOMEM
;
5209 dprintk("--> %s\n", __func__
);
5210 calldata
= kzalloc(sizeof(*calldata
), GFP_KERNEL
);
5211 if (calldata
== NULL
)
5213 calldata
->clp
= clp
;
5214 calldata
->arg
.one_fs
= 0;
5215 calldata
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
5217 msg
.rpc_argp
= &calldata
->arg
;
5218 msg
.rpc_resp
= &calldata
->res
;
5219 task_setup_data
.callback_data
= calldata
;
5220 task
= rpc_run_task(&task_setup_data
);
5222 status
= PTR_ERR(task
);
5228 dprintk("<-- %s status=%d\n", __func__
, status
);
5231 #endif /* CONFIG_NFS_V4_1 */
5233 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops
= {
5234 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
5235 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
5236 .recover_open
= nfs4_open_reclaim
,
5237 .recover_lock
= nfs4_lock_reclaim
,
5238 .establish_clid
= nfs4_init_clientid
,
5239 .get_clid_cred
= nfs4_get_setclientid_cred
,
5242 #if defined(CONFIG_NFS_V4_1)
5243 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops
= {
5244 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
5245 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
5246 .recover_open
= nfs4_open_reclaim
,
5247 .recover_lock
= nfs4_lock_reclaim
,
5248 .establish_clid
= nfs41_init_clientid
,
5249 .get_clid_cred
= nfs4_get_exchange_id_cred
,
5250 .reclaim_complete
= nfs41_proc_reclaim_complete
,
5252 #endif /* CONFIG_NFS_V4_1 */
5254 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops
= {
5255 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
5256 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
5257 .recover_open
= nfs4_open_expired
,
5258 .recover_lock
= nfs4_lock_expired
,
5259 .establish_clid
= nfs4_init_clientid
,
5260 .get_clid_cred
= nfs4_get_setclientid_cred
,
5263 #if defined(CONFIG_NFS_V4_1)
5264 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops
= {
5265 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
5266 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
5267 .recover_open
= nfs4_open_expired
,
5268 .recover_lock
= nfs4_lock_expired
,
5269 .establish_clid
= nfs41_init_clientid
,
5270 .get_clid_cred
= nfs4_get_exchange_id_cred
,
5272 #endif /* CONFIG_NFS_V4_1 */
5274 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops
= {
5275 .sched_state_renewal
= nfs4_proc_async_renew
,
5276 .get_state_renewal_cred_locked
= nfs4_get_renew_cred_locked
,
5277 .renew_lease
= nfs4_proc_renew
,
5280 #if defined(CONFIG_NFS_V4_1)
5281 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops
= {
5282 .sched_state_renewal
= nfs41_proc_async_sequence
,
5283 .get_state_renewal_cred_locked
= nfs4_get_machine_cred_locked
,
5284 .renew_lease
= nfs4_proc_sequence
,
5289 * Per minor version reboot and network partition recovery ops
5292 struct nfs4_state_recovery_ops
*nfs4_reboot_recovery_ops
[] = {
5293 &nfs40_reboot_recovery_ops
,
5294 #if defined(CONFIG_NFS_V4_1)
5295 &nfs41_reboot_recovery_ops
,
5299 struct nfs4_state_recovery_ops
*nfs4_nograce_recovery_ops
[] = {
5300 &nfs40_nograce_recovery_ops
,
5301 #if defined(CONFIG_NFS_V4_1)
5302 &nfs41_nograce_recovery_ops
,
5306 struct nfs4_state_maintenance_ops
*nfs4_state_renewal_ops
[] = {
5307 &nfs40_state_renewal_ops
,
5308 #if defined(CONFIG_NFS_V4_1)
5309 &nfs41_state_renewal_ops
,
5313 static const struct inode_operations nfs4_file_inode_operations
= {
5314 .permission
= nfs_permission
,
5315 .getattr
= nfs_getattr
,
5316 .setattr
= nfs_setattr
,
5317 .getxattr
= nfs4_getxattr
,
5318 .setxattr
= nfs4_setxattr
,
5319 .listxattr
= nfs4_listxattr
,
5322 const struct nfs_rpc_ops nfs_v4_clientops
= {
5323 .version
= 4, /* protocol version */
5324 .dentry_ops
= &nfs4_dentry_operations
,
5325 .dir_inode_ops
= &nfs4_dir_inode_operations
,
5326 .file_inode_ops
= &nfs4_file_inode_operations
,
5327 .getroot
= nfs4_proc_get_root
,
5328 .getattr
= nfs4_proc_getattr
,
5329 .setattr
= nfs4_proc_setattr
,
5330 .lookupfh
= nfs4_proc_lookupfh
,
5331 .lookup
= nfs4_proc_lookup
,
5332 .access
= nfs4_proc_access
,
5333 .readlink
= nfs4_proc_readlink
,
5334 .create
= nfs4_proc_create
,
5335 .remove
= nfs4_proc_remove
,
5336 .unlink_setup
= nfs4_proc_unlink_setup
,
5337 .unlink_done
= nfs4_proc_unlink_done
,
5338 .rename
= nfs4_proc_rename
,
5339 .link
= nfs4_proc_link
,
5340 .symlink
= nfs4_proc_symlink
,
5341 .mkdir
= nfs4_proc_mkdir
,
5342 .rmdir
= nfs4_proc_remove
,
5343 .readdir
= nfs4_proc_readdir
,
5344 .mknod
= nfs4_proc_mknod
,
5345 .statfs
= nfs4_proc_statfs
,
5346 .fsinfo
= nfs4_proc_fsinfo
,
5347 .pathconf
= nfs4_proc_pathconf
,
5348 .set_capabilities
= nfs4_server_capabilities
,
5349 .decode_dirent
= nfs4_decode_dirent
,
5350 .read_setup
= nfs4_proc_read_setup
,
5351 .read_done
= nfs4_read_done
,
5352 .write_setup
= nfs4_proc_write_setup
,
5353 .write_done
= nfs4_write_done
,
5354 .commit_setup
= nfs4_proc_commit_setup
,
5355 .commit_done
= nfs4_commit_done
,
5356 .lock
= nfs4_proc_lock
,
5357 .clear_acl_cache
= nfs4_zap_acl_attr
,
5358 .close_context
= nfs4_close_context
,