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
);
73 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
74 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
75 struct nfs4_state
*state
);
77 /* Prevent leaks of NFSv4 errors into userland */
78 static int nfs4_map_errors(int err
)
83 case -NFS4ERR_RESOURCE
:
86 dprintk("%s could not handle NFSv4 error %d\n",
94 * This is our standard bitmap for GETATTR requests.
96 const u32 nfs4_fattr_bitmap
[2] = {
101 | FATTR4_WORD0_FILEID
,
103 | FATTR4_WORD1_NUMLINKS
105 | FATTR4_WORD1_OWNER_GROUP
106 | FATTR4_WORD1_RAWDEV
107 | FATTR4_WORD1_SPACE_USED
108 | FATTR4_WORD1_TIME_ACCESS
109 | FATTR4_WORD1_TIME_METADATA
110 | FATTR4_WORD1_TIME_MODIFY
113 const u32 nfs4_statfs_bitmap
[2] = {
114 FATTR4_WORD0_FILES_AVAIL
115 | FATTR4_WORD0_FILES_FREE
116 | FATTR4_WORD0_FILES_TOTAL
,
117 FATTR4_WORD1_SPACE_AVAIL
118 | FATTR4_WORD1_SPACE_FREE
119 | FATTR4_WORD1_SPACE_TOTAL
122 const u32 nfs4_pathconf_bitmap
[2] = {
124 | FATTR4_WORD0_MAXNAME
,
128 const u32 nfs4_fsinfo_bitmap
[2] = { FATTR4_WORD0_MAXFILESIZE
129 | FATTR4_WORD0_MAXREAD
130 | FATTR4_WORD0_MAXWRITE
131 | FATTR4_WORD0_LEASE_TIME
,
135 const u32 nfs4_fs_locations_bitmap
[2] = {
137 | FATTR4_WORD0_CHANGE
140 | FATTR4_WORD0_FILEID
141 | FATTR4_WORD0_FS_LOCATIONS
,
143 | FATTR4_WORD1_NUMLINKS
145 | FATTR4_WORD1_OWNER_GROUP
146 | FATTR4_WORD1_RAWDEV
147 | FATTR4_WORD1_SPACE_USED
148 | FATTR4_WORD1_TIME_ACCESS
149 | FATTR4_WORD1_TIME_METADATA
150 | FATTR4_WORD1_TIME_MODIFY
151 | FATTR4_WORD1_MOUNTED_ON_FILEID
154 static void nfs4_setup_readdir(u64 cookie
, __be32
*verifier
, struct dentry
*dentry
,
155 struct nfs4_readdir_arg
*readdir
)
159 BUG_ON(readdir
->count
< 80);
161 readdir
->cookie
= cookie
;
162 memcpy(&readdir
->verifier
, verifier
, sizeof(readdir
->verifier
));
167 memset(&readdir
->verifier
, 0, sizeof(readdir
->verifier
));
172 * NFSv4 servers do not return entries for '.' and '..'
173 * Therefore, we fake these entries here. We let '.'
174 * have cookie 0 and '..' have cookie 1. Note that
175 * when talking to the server, we always send cookie 0
178 start
= p
= kmap_atomic(*readdir
->pages
, KM_USER0
);
181 *p
++ = xdr_one
; /* next */
182 *p
++ = xdr_zero
; /* cookie, first word */
183 *p
++ = xdr_one
; /* cookie, second word */
184 *p
++ = xdr_one
; /* entry len */
185 memcpy(p
, ".\0\0\0", 4); /* entry */
187 *p
++ = xdr_one
; /* bitmap length */
188 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
189 *p
++ = htonl(8); /* attribute buffer length */
190 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_inode
));
193 *p
++ = xdr_one
; /* next */
194 *p
++ = xdr_zero
; /* cookie, first word */
195 *p
++ = xdr_two
; /* cookie, second word */
196 *p
++ = xdr_two
; /* entry len */
197 memcpy(p
, "..\0\0", 4); /* entry */
199 *p
++ = xdr_one
; /* bitmap length */
200 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
201 *p
++ = htonl(8); /* attribute buffer length */
202 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_parent
->d_inode
));
204 readdir
->pgbase
= (char *)p
- (char *)start
;
205 readdir
->count
-= readdir
->pgbase
;
206 kunmap_atomic(start
, KM_USER0
);
209 static int nfs4_wait_clnt_recover(struct nfs_client
*clp
)
215 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
,
216 nfs_wait_bit_killable
, TASK_KILLABLE
);
220 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
227 *timeout
= NFS4_POLL_RETRY_MIN
;
228 if (*timeout
> NFS4_POLL_RETRY_MAX
)
229 *timeout
= NFS4_POLL_RETRY_MAX
;
230 schedule_timeout_killable(*timeout
);
231 if (fatal_signal_pending(current
))
237 /* This is the error handling routine for processes that are allowed
240 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
242 struct nfs_client
*clp
= server
->nfs_client
;
243 struct nfs4_state
*state
= exception
->state
;
246 exception
->retry
= 0;
250 case -NFS4ERR_ADMIN_REVOKED
:
251 case -NFS4ERR_BAD_STATEID
:
252 case -NFS4ERR_OPENMODE
:
255 nfs4_state_mark_reclaim_nograce(clp
, state
);
256 goto do_state_recovery
;
257 case -NFS4ERR_STALE_STATEID
:
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
,
720 struct dentry
*parent
= dget_parent(path
->dentry
);
721 struct inode
*dir
= parent
->d_inode
;
722 struct nfs_server
*server
= NFS_SERVER(dir
);
723 struct nfs4_opendata
*p
;
725 p
= kzalloc(sizeof(*p
), gfp_mask
);
728 p
->o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
, gfp_mask
);
729 if (p
->o_arg
.seqid
== NULL
)
735 atomic_inc(&sp
->so_count
);
736 p
->o_arg
.fh
= NFS_FH(dir
);
737 p
->o_arg
.open_flags
= flags
;
738 p
->o_arg
.fmode
= fmode
& (FMODE_READ
|FMODE_WRITE
);
739 p
->o_arg
.clientid
= server
->nfs_client
->cl_clientid
;
740 p
->o_arg
.id
= sp
->so_owner_id
.id
;
741 p
->o_arg
.name
= &p
->path
.dentry
->d_name
;
742 p
->o_arg
.server
= server
;
743 p
->o_arg
.bitmask
= server
->attr_bitmask
;
744 p
->o_arg
.claim
= NFS4_OPEN_CLAIM_NULL
;
745 if (flags
& O_EXCL
) {
746 if (nfs4_has_persistent_session(server
->nfs_client
)) {
748 p
->o_arg
.u
.attrs
= &p
->attrs
;
749 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
750 } else { /* EXCLUSIVE4_1 */
751 u32
*s
= (u32
*) p
->o_arg
.u
.verifier
.data
;
755 } else if (flags
& O_CREAT
) {
756 p
->o_arg
.u
.attrs
= &p
->attrs
;
757 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
759 p
->c_arg
.fh
= &p
->o_res
.fh
;
760 p
->c_arg
.stateid
= &p
->o_res
.stateid
;
761 p
->c_arg
.seqid
= p
->o_arg
.seqid
;
762 nfs4_init_opendata_res(p
);
772 static void nfs4_opendata_free(struct kref
*kref
)
774 struct nfs4_opendata
*p
= container_of(kref
,
775 struct nfs4_opendata
, kref
);
777 nfs_free_seqid(p
->o_arg
.seqid
);
778 if (p
->state
!= NULL
)
779 nfs4_put_open_state(p
->state
);
780 nfs4_put_state_owner(p
->owner
);
786 static void nfs4_opendata_put(struct nfs4_opendata
*p
)
789 kref_put(&p
->kref
, nfs4_opendata_free
);
792 static int nfs4_wait_for_completion_rpc_task(struct rpc_task
*task
)
796 ret
= rpc_wait_for_completion_task(task
);
800 static int can_open_cached(struct nfs4_state
*state
, fmode_t mode
, int open_mode
)
804 if (open_mode
& O_EXCL
)
806 switch (mode
& (FMODE_READ
|FMODE_WRITE
)) {
808 ret
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0
809 && state
->n_rdonly
!= 0;
812 ret
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0
813 && state
->n_wronly
!= 0;
815 case FMODE_READ
|FMODE_WRITE
:
816 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0
817 && state
->n_rdwr
!= 0;
823 static int can_open_delegated(struct nfs_delegation
*delegation
, fmode_t fmode
)
825 if ((delegation
->type
& fmode
) != fmode
)
827 if (test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
))
829 nfs_mark_delegation_referenced(delegation
);
833 static void update_open_stateflags(struct nfs4_state
*state
, fmode_t fmode
)
842 case FMODE_READ
|FMODE_WRITE
:
845 nfs4_state_set_mode_locked(state
, state
->state
| fmode
);
848 static void nfs_set_open_stateid_locked(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
850 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
851 memcpy(state
->stateid
.data
, stateid
->data
, sizeof(state
->stateid
.data
));
852 memcpy(state
->open_stateid
.data
, stateid
->data
, sizeof(state
->open_stateid
.data
));
855 set_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
858 set_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
860 case FMODE_READ
|FMODE_WRITE
:
861 set_bit(NFS_O_RDWR_STATE
, &state
->flags
);
865 static void nfs_set_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
867 write_seqlock(&state
->seqlock
);
868 nfs_set_open_stateid_locked(state
, stateid
, fmode
);
869 write_sequnlock(&state
->seqlock
);
872 static void __update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, const nfs4_stateid
*deleg_stateid
, fmode_t fmode
)
875 * Protect the call to nfs4_state_set_mode_locked and
876 * serialise the stateid update
878 write_seqlock(&state
->seqlock
);
879 if (deleg_stateid
!= NULL
) {
880 memcpy(state
->stateid
.data
, deleg_stateid
->data
, sizeof(state
->stateid
.data
));
881 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
883 if (open_stateid
!= NULL
)
884 nfs_set_open_stateid_locked(state
, open_stateid
, fmode
);
885 write_sequnlock(&state
->seqlock
);
886 spin_lock(&state
->owner
->so_lock
);
887 update_open_stateflags(state
, fmode
);
888 spin_unlock(&state
->owner
->so_lock
);
891 static int update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, nfs4_stateid
*delegation
, fmode_t fmode
)
893 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
894 struct nfs_delegation
*deleg_cur
;
897 fmode
&= (FMODE_READ
|FMODE_WRITE
);
900 deleg_cur
= rcu_dereference(nfsi
->delegation
);
901 if (deleg_cur
== NULL
)
904 spin_lock(&deleg_cur
->lock
);
905 if (nfsi
->delegation
!= deleg_cur
||
906 (deleg_cur
->type
& fmode
) != fmode
)
907 goto no_delegation_unlock
;
909 if (delegation
== NULL
)
910 delegation
= &deleg_cur
->stateid
;
911 else if (memcmp(deleg_cur
->stateid
.data
, delegation
->data
, NFS4_STATEID_SIZE
) != 0)
912 goto no_delegation_unlock
;
914 nfs_mark_delegation_referenced(deleg_cur
);
915 __update_open_stateid(state
, open_stateid
, &deleg_cur
->stateid
, fmode
);
917 no_delegation_unlock
:
918 spin_unlock(&deleg_cur
->lock
);
922 if (!ret
&& open_stateid
!= NULL
) {
923 __update_open_stateid(state
, open_stateid
, NULL
, fmode
);
931 static void nfs4_return_incompatible_delegation(struct inode
*inode
, fmode_t fmode
)
933 struct nfs_delegation
*delegation
;
936 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
937 if (delegation
== NULL
|| (delegation
->type
& fmode
) == fmode
) {
942 nfs_inode_return_delegation(inode
);
945 static struct nfs4_state
*nfs4_try_open_cached(struct nfs4_opendata
*opendata
)
947 struct nfs4_state
*state
= opendata
->state
;
948 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
949 struct nfs_delegation
*delegation
;
950 int open_mode
= opendata
->o_arg
.open_flags
& O_EXCL
;
951 fmode_t fmode
= opendata
->o_arg
.fmode
;
952 nfs4_stateid stateid
;
956 if (can_open_cached(state
, fmode
, open_mode
)) {
957 spin_lock(&state
->owner
->so_lock
);
958 if (can_open_cached(state
, fmode
, open_mode
)) {
959 update_open_stateflags(state
, fmode
);
960 spin_unlock(&state
->owner
->so_lock
);
961 goto out_return_state
;
963 spin_unlock(&state
->owner
->so_lock
);
966 delegation
= rcu_dereference(nfsi
->delegation
);
967 if (delegation
== NULL
||
968 !can_open_delegated(delegation
, fmode
)) {
972 /* Save the delegation */
973 memcpy(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
));
975 ret
= nfs_may_open(state
->inode
, state
->owner
->so_cred
, open_mode
);
980 /* Try to update the stateid using the delegation */
981 if (update_open_stateid(state
, NULL
, &stateid
, fmode
))
982 goto out_return_state
;
987 atomic_inc(&state
->count
);
991 static struct nfs4_state
*nfs4_opendata_to_nfs4_state(struct nfs4_opendata
*data
)
994 struct nfs4_state
*state
= NULL
;
995 struct nfs_delegation
*delegation
;
998 if (!data
->rpc_done
) {
999 state
= nfs4_try_open_cached(data
);
1004 if (!(data
->f_attr
.valid
& NFS_ATTR_FATTR
))
1006 inode
= nfs_fhget(data
->dir
->d_sb
, &data
->o_res
.fh
, &data
->f_attr
);
1007 ret
= PTR_ERR(inode
);
1011 state
= nfs4_get_open_state(inode
, data
->owner
);
1014 if (data
->o_res
.delegation_type
!= 0) {
1015 int delegation_flags
= 0;
1018 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
1020 delegation_flags
= delegation
->flags
;
1022 if ((delegation_flags
& 1UL<<NFS_DELEGATION_NEED_RECLAIM
) == 0)
1023 nfs_inode_set_delegation(state
->inode
,
1024 data
->owner
->so_cred
,
1027 nfs_inode_reclaim_delegation(state
->inode
,
1028 data
->owner
->so_cred
,
1032 update_open_stateid(state
, &data
->o_res
.stateid
, NULL
,
1040 return ERR_PTR(ret
);
1043 static struct nfs_open_context
*nfs4_state_find_open_context(struct nfs4_state
*state
)
1045 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
1046 struct nfs_open_context
*ctx
;
1048 spin_lock(&state
->inode
->i_lock
);
1049 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
1050 if (ctx
->state
!= state
)
1052 get_nfs_open_context(ctx
);
1053 spin_unlock(&state
->inode
->i_lock
);
1056 spin_unlock(&state
->inode
->i_lock
);
1057 return ERR_PTR(-ENOENT
);
1060 static struct nfs4_opendata
*nfs4_open_recoverdata_alloc(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1062 struct nfs4_opendata
*opendata
;
1064 opendata
= nfs4_opendata_alloc(&ctx
->path
, state
->owner
, 0, 0, NULL
, GFP_NOFS
);
1065 if (opendata
== NULL
)
1066 return ERR_PTR(-ENOMEM
);
1067 opendata
->state
= state
;
1068 atomic_inc(&state
->count
);
1072 static int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, fmode_t fmode
, struct nfs4_state
**res
)
1074 struct nfs4_state
*newstate
;
1077 opendata
->o_arg
.open_flags
= 0;
1078 opendata
->o_arg
.fmode
= fmode
;
1079 memset(&opendata
->o_res
, 0, sizeof(opendata
->o_res
));
1080 memset(&opendata
->c_res
, 0, sizeof(opendata
->c_res
));
1081 nfs4_init_opendata_res(opendata
);
1082 ret
= _nfs4_recover_proc_open(opendata
);
1085 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
1086 if (IS_ERR(newstate
))
1087 return PTR_ERR(newstate
);
1088 nfs4_close_state(&opendata
->path
, newstate
, fmode
);
1093 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
1095 struct nfs4_state
*newstate
;
1098 /* memory barrier prior to reading state->n_* */
1099 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
1101 if (state
->n_rdwr
!= 0) {
1102 clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1103 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &newstate
);
1106 if (newstate
!= state
)
1109 if (state
->n_wronly
!= 0) {
1110 clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1111 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &newstate
);
1114 if (newstate
!= state
)
1117 if (state
->n_rdonly
!= 0) {
1118 clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1119 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &newstate
);
1122 if (newstate
!= state
)
1126 * We may have performed cached opens for all three recoveries.
1127 * Check if we need to update the current stateid.
1129 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0 &&
1130 memcmp(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
)) != 0) {
1131 write_seqlock(&state
->seqlock
);
1132 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
1133 memcpy(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
));
1134 write_sequnlock(&state
->seqlock
);
1141 * reclaim state on the server after a reboot.
1143 static int _nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1145 struct nfs_delegation
*delegation
;
1146 struct nfs4_opendata
*opendata
;
1147 fmode_t delegation_type
= 0;
1150 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1151 if (IS_ERR(opendata
))
1152 return PTR_ERR(opendata
);
1153 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
1154 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
1156 delegation
= rcu_dereference(NFS_I(state
->inode
)->delegation
);
1157 if (delegation
!= NULL
&& test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) != 0)
1158 delegation_type
= delegation
->type
;
1160 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
1161 status
= nfs4_open_recover(opendata
, state
);
1162 nfs4_opendata_put(opendata
);
1166 static int nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1168 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1169 struct nfs4_exception exception
= { };
1172 err
= _nfs4_do_open_reclaim(ctx
, state
);
1173 if (err
!= -NFS4ERR_DELAY
&& err
!= -EKEYEXPIRED
)
1175 nfs4_handle_exception(server
, err
, &exception
);
1176 } while (exception
.retry
);
1180 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1182 struct nfs_open_context
*ctx
;
1185 ctx
= nfs4_state_find_open_context(state
);
1187 return PTR_ERR(ctx
);
1188 ret
= nfs4_do_open_reclaim(ctx
, state
);
1189 put_nfs_open_context(ctx
);
1193 static int _nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
1195 struct nfs4_opendata
*opendata
;
1198 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1199 if (IS_ERR(opendata
))
1200 return PTR_ERR(opendata
);
1201 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
1202 memcpy(opendata
->o_arg
.u
.delegation
.data
, stateid
->data
,
1203 sizeof(opendata
->o_arg
.u
.delegation
.data
));
1204 ret
= nfs4_open_recover(opendata
, state
);
1205 nfs4_opendata_put(opendata
);
1209 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
1211 struct nfs4_exception exception
= { };
1212 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1215 err
= _nfs4_open_delegation_recall(ctx
, state
, stateid
);
1221 case -NFS4ERR_BADSESSION
:
1222 case -NFS4ERR_BADSLOT
:
1223 case -NFS4ERR_BAD_HIGH_SLOT
:
1224 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1225 case -NFS4ERR_DEADSESSION
:
1226 nfs4_schedule_state_recovery(
1227 server
->nfs_client
);
1229 case -NFS4ERR_STALE_CLIENTID
:
1230 case -NFS4ERR_STALE_STATEID
:
1231 case -NFS4ERR_EXPIRED
:
1232 /* Don't recall a delegation if it was lost */
1233 nfs4_schedule_state_recovery(server
->nfs_client
);
1237 * The show must go on: exit, but mark the
1238 * stateid as needing recovery.
1240 case -NFS4ERR_ADMIN_REVOKED
:
1241 case -NFS4ERR_BAD_STATEID
:
1242 nfs4_state_mark_reclaim_nograce(server
->nfs_client
, state
);
1247 err
= nfs4_handle_exception(server
, err
, &exception
);
1248 } while (exception
.retry
);
1253 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
1255 struct nfs4_opendata
*data
= calldata
;
1257 data
->rpc_status
= task
->tk_status
;
1258 if (RPC_ASSASSINATED(task
))
1260 if (data
->rpc_status
== 0) {
1261 memcpy(data
->o_res
.stateid
.data
, data
->c_res
.stateid
.data
,
1262 sizeof(data
->o_res
.stateid
.data
));
1263 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
1264 renew_lease(data
->o_res
.server
, data
->timestamp
);
1269 static void nfs4_open_confirm_release(void *calldata
)
1271 struct nfs4_opendata
*data
= calldata
;
1272 struct nfs4_state
*state
= NULL
;
1274 /* If this request hasn't been cancelled, do nothing */
1275 if (data
->cancelled
== 0)
1277 /* In case of error, no cleanup! */
1278 if (!data
->rpc_done
)
1280 state
= nfs4_opendata_to_nfs4_state(data
);
1282 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
1284 nfs4_opendata_put(data
);
1287 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
1288 .rpc_call_done
= nfs4_open_confirm_done
,
1289 .rpc_release
= nfs4_open_confirm_release
,
1293 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1295 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
1297 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
1298 struct rpc_task
*task
;
1299 struct rpc_message msg
= {
1300 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
1301 .rpc_argp
= &data
->c_arg
,
1302 .rpc_resp
= &data
->c_res
,
1303 .rpc_cred
= data
->owner
->so_cred
,
1305 struct rpc_task_setup task_setup_data
= {
1306 .rpc_client
= server
->client
,
1307 .rpc_message
= &msg
,
1308 .callback_ops
= &nfs4_open_confirm_ops
,
1309 .callback_data
= data
,
1310 .workqueue
= nfsiod_workqueue
,
1311 .flags
= RPC_TASK_ASYNC
,
1315 kref_get(&data
->kref
);
1317 data
->rpc_status
= 0;
1318 data
->timestamp
= jiffies
;
1319 task
= rpc_run_task(&task_setup_data
);
1321 return PTR_ERR(task
);
1322 status
= nfs4_wait_for_completion_rpc_task(task
);
1324 data
->cancelled
= 1;
1327 status
= data
->rpc_status
;
1332 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
1334 struct nfs4_opendata
*data
= calldata
;
1335 struct nfs4_state_owner
*sp
= data
->owner
;
1337 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
1340 * Check if we still need to send an OPEN call, or if we can use
1341 * a delegation instead.
1343 if (data
->state
!= NULL
) {
1344 struct nfs_delegation
*delegation
;
1346 if (can_open_cached(data
->state
, data
->o_arg
.fmode
, data
->o_arg
.open_flags
))
1349 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
1350 if (delegation
!= NULL
&&
1351 test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) == 0) {
1357 /* Update sequence id. */
1358 data
->o_arg
.id
= sp
->so_owner_id
.id
;
1359 data
->o_arg
.clientid
= sp
->so_client
->cl_clientid
;
1360 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
) {
1361 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
1362 nfs_copy_fh(&data
->o_res
.fh
, data
->o_arg
.fh
);
1364 data
->timestamp
= jiffies
;
1365 if (nfs4_setup_sequence(data
->o_arg
.server
->nfs_client
,
1366 &data
->o_arg
.seq_args
,
1367 &data
->o_res
.seq_res
, 1, task
))
1369 rpc_call_start(task
);
1372 task
->tk_action
= NULL
;
1376 static void nfs4_recover_open_prepare(struct rpc_task
*task
, void *calldata
)
1378 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
1379 nfs4_open_prepare(task
, calldata
);
1382 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
1384 struct nfs4_opendata
*data
= calldata
;
1386 data
->rpc_status
= task
->tk_status
;
1388 nfs4_sequence_done(data
->o_arg
.server
, &data
->o_res
.seq_res
,
1391 if (RPC_ASSASSINATED(task
))
1393 if (task
->tk_status
== 0) {
1394 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
1398 data
->rpc_status
= -ELOOP
;
1401 data
->rpc_status
= -EISDIR
;
1404 data
->rpc_status
= -ENOTDIR
;
1406 renew_lease(data
->o_res
.server
, data
->timestamp
);
1407 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
1408 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
1413 static void nfs4_open_release(void *calldata
)
1415 struct nfs4_opendata
*data
= calldata
;
1416 struct nfs4_state
*state
= NULL
;
1418 /* If this request hasn't been cancelled, do nothing */
1419 if (data
->cancelled
== 0)
1421 /* In case of error, no cleanup! */
1422 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
1424 /* In case we need an open_confirm, no cleanup! */
1425 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
1427 state
= nfs4_opendata_to_nfs4_state(data
);
1429 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
1431 nfs4_opendata_put(data
);
1434 static const struct rpc_call_ops nfs4_open_ops
= {
1435 .rpc_call_prepare
= nfs4_open_prepare
,
1436 .rpc_call_done
= nfs4_open_done
,
1437 .rpc_release
= nfs4_open_release
,
1440 static const struct rpc_call_ops nfs4_recover_open_ops
= {
1441 .rpc_call_prepare
= nfs4_recover_open_prepare
,
1442 .rpc_call_done
= nfs4_open_done
,
1443 .rpc_release
= nfs4_open_release
,
1446 static int nfs4_run_open_task(struct nfs4_opendata
*data
, int isrecover
)
1448 struct inode
*dir
= data
->dir
->d_inode
;
1449 struct nfs_server
*server
= NFS_SERVER(dir
);
1450 struct nfs_openargs
*o_arg
= &data
->o_arg
;
1451 struct nfs_openres
*o_res
= &data
->o_res
;
1452 struct rpc_task
*task
;
1453 struct rpc_message msg
= {
1454 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
1457 .rpc_cred
= data
->owner
->so_cred
,
1459 struct rpc_task_setup task_setup_data
= {
1460 .rpc_client
= server
->client
,
1461 .rpc_message
= &msg
,
1462 .callback_ops
= &nfs4_open_ops
,
1463 .callback_data
= data
,
1464 .workqueue
= nfsiod_workqueue
,
1465 .flags
= RPC_TASK_ASYNC
,
1469 kref_get(&data
->kref
);
1471 data
->rpc_status
= 0;
1472 data
->cancelled
= 0;
1474 task_setup_data
.callback_ops
= &nfs4_recover_open_ops
;
1475 task
= rpc_run_task(&task_setup_data
);
1477 return PTR_ERR(task
);
1478 status
= nfs4_wait_for_completion_rpc_task(task
);
1480 data
->cancelled
= 1;
1483 status
= data
->rpc_status
;
1489 static int _nfs4_recover_proc_open(struct nfs4_opendata
*data
)
1491 struct inode
*dir
= data
->dir
->d_inode
;
1492 struct nfs_openres
*o_res
= &data
->o_res
;
1495 status
= nfs4_run_open_task(data
, 1);
1496 if (status
!= 0 || !data
->rpc_done
)
1499 nfs_refresh_inode(dir
, o_res
->dir_attr
);
1501 if (o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1502 status
= _nfs4_proc_open_confirm(data
);
1511 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1513 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
1515 struct inode
*dir
= data
->dir
->d_inode
;
1516 struct nfs_server
*server
= NFS_SERVER(dir
);
1517 struct nfs_openargs
*o_arg
= &data
->o_arg
;
1518 struct nfs_openres
*o_res
= &data
->o_res
;
1521 status
= nfs4_run_open_task(data
, 0);
1522 if (status
!= 0 || !data
->rpc_done
)
1525 if (o_arg
->open_flags
& O_CREAT
) {
1526 update_changeattr(dir
, &o_res
->cinfo
);
1527 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
1529 nfs_refresh_inode(dir
, o_res
->dir_attr
);
1530 if ((o_res
->rflags
& NFS4_OPEN_RESULT_LOCKTYPE_POSIX
) == 0)
1531 server
->caps
&= ~NFS_CAP_POSIX_LOCK
;
1532 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1533 status
= _nfs4_proc_open_confirm(data
);
1537 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
1538 _nfs4_proc_getattr(server
, &o_res
->fh
, o_res
->f_attr
);
1542 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
1544 struct nfs_client
*clp
= server
->nfs_client
;
1548 for (loop
= NFS4_MAX_LOOP_ON_RECOVER
; loop
!= 0; loop
--) {
1549 ret
= nfs4_wait_clnt_recover(clp
);
1552 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
1553 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
1555 nfs4_schedule_state_recovery(clp
);
1563 * reclaim state on the server after a network partition.
1564 * Assumes caller holds the appropriate lock
1566 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1568 struct nfs4_opendata
*opendata
;
1571 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1572 if (IS_ERR(opendata
))
1573 return PTR_ERR(opendata
);
1574 ret
= nfs4_open_recover(opendata
, state
);
1576 d_drop(ctx
->path
.dentry
);
1577 nfs4_opendata_put(opendata
);
1581 static int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1583 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1584 struct nfs4_exception exception
= { };
1588 err
= _nfs4_open_expired(ctx
, state
);
1592 case -NFS4ERR_GRACE
:
1593 case -NFS4ERR_DELAY
:
1595 nfs4_handle_exception(server
, err
, &exception
);
1598 } while (exception
.retry
);
1603 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1605 struct nfs_open_context
*ctx
;
1608 ctx
= nfs4_state_find_open_context(state
);
1610 return PTR_ERR(ctx
);
1611 ret
= nfs4_do_open_expired(ctx
, state
);
1612 put_nfs_open_context(ctx
);
1617 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1618 * fields corresponding to attributes that were used to store the verifier.
1619 * Make sure we clobber those fields in the later setattr call
1621 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1623 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1624 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1625 sattr
->ia_valid
|= ATTR_ATIME
;
1627 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1628 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1629 sattr
->ia_valid
|= ATTR_MTIME
;
1633 * Returns a referenced nfs4_state
1635 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
)
1637 struct nfs4_state_owner
*sp
;
1638 struct nfs4_state
*state
= NULL
;
1639 struct nfs_server
*server
= NFS_SERVER(dir
);
1640 struct nfs4_opendata
*opendata
;
1643 /* Protect against reboot recovery conflicts */
1645 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1646 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1649 status
= nfs4_recover_expired_lease(server
);
1651 goto err_put_state_owner
;
1652 if (path
->dentry
->d_inode
!= NULL
)
1653 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, fmode
);
1655 opendata
= nfs4_opendata_alloc(path
, sp
, fmode
, flags
, sattr
, GFP_KERNEL
);
1656 if (opendata
== NULL
)
1657 goto err_put_state_owner
;
1659 if (path
->dentry
->d_inode
!= NULL
)
1660 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1662 status
= _nfs4_proc_open(opendata
);
1664 goto err_opendata_put
;
1666 state
= nfs4_opendata_to_nfs4_state(opendata
);
1667 status
= PTR_ERR(state
);
1669 goto err_opendata_put
;
1670 if (server
->caps
& NFS_CAP_POSIX_LOCK
)
1671 set_bit(NFS_STATE_POSIX_LOCKS
, &state
->flags
);
1673 if (opendata
->o_arg
.open_flags
& O_EXCL
) {
1674 nfs4_exclusive_attrset(opendata
, sattr
);
1676 nfs_fattr_init(opendata
->o_res
.f_attr
);
1677 status
= nfs4_do_setattr(state
->inode
, cred
,
1678 opendata
->o_res
.f_attr
, sattr
,
1681 nfs_setattr_update_inode(state
->inode
, sattr
);
1682 nfs_post_op_update_inode(state
->inode
, opendata
->o_res
.f_attr
);
1684 nfs4_opendata_put(opendata
);
1685 nfs4_put_state_owner(sp
);
1689 nfs4_opendata_put(opendata
);
1690 err_put_state_owner
:
1691 nfs4_put_state_owner(sp
);
1698 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
)
1700 struct nfs4_exception exception
= { };
1701 struct nfs4_state
*res
;
1705 status
= _nfs4_do_open(dir
, path
, fmode
, flags
, sattr
, cred
, &res
);
1708 /* NOTE: BAD_SEQID means the server and client disagree about the
1709 * book-keeping w.r.t. state-changing operations
1710 * (OPEN/CLOSE/LOCK/LOCKU...)
1711 * It is actually a sign of a bug on the client or on the server.
1713 * If we receive a BAD_SEQID error in the particular case of
1714 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1715 * have unhashed the old state_owner for us, and that we can
1716 * therefore safely retry using a new one. We should still warn
1717 * the user though...
1719 if (status
== -NFS4ERR_BAD_SEQID
) {
1720 printk(KERN_WARNING
"NFS: v4 server %s "
1721 " returned a bad sequence-id error!\n",
1722 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1723 exception
.retry
= 1;
1727 * BAD_STATEID on OPEN means that the server cancelled our
1728 * state before it received the OPEN_CONFIRM.
1729 * Recover by retrying the request as per the discussion
1730 * on Page 181 of RFC3530.
1732 if (status
== -NFS4ERR_BAD_STATEID
) {
1733 exception
.retry
= 1;
1736 if (status
== -EAGAIN
) {
1737 /* We must have found a delegation */
1738 exception
.retry
= 1;
1741 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1742 status
, &exception
));
1743 } while (exception
.retry
);
1747 static int _nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1748 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1749 struct nfs4_state
*state
)
1751 struct nfs_server
*server
= NFS_SERVER(inode
);
1752 struct nfs_setattrargs arg
= {
1753 .fh
= NFS_FH(inode
),
1756 .bitmask
= server
->attr_bitmask
,
1758 struct nfs_setattrres res
= {
1762 struct rpc_message msg
= {
1763 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1768 unsigned long timestamp
= jiffies
;
1771 nfs_fattr_init(fattr
);
1773 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1774 /* Use that stateid */
1775 } else if (state
!= NULL
) {
1776 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1778 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1780 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
1781 if (status
== 0 && state
!= NULL
)
1782 renew_lease(server
, timestamp
);
1786 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1787 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1788 struct nfs4_state
*state
)
1790 struct nfs_server
*server
= NFS_SERVER(inode
);
1791 struct nfs4_exception exception
= { };
1794 err
= nfs4_handle_exception(server
,
1795 _nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
),
1797 } while (exception
.retry
);
1801 struct nfs4_closedata
{
1803 struct inode
*inode
;
1804 struct nfs4_state
*state
;
1805 struct nfs_closeargs arg
;
1806 struct nfs_closeres res
;
1807 struct nfs_fattr fattr
;
1808 unsigned long timestamp
;
1811 static void nfs4_free_closedata(void *data
)
1813 struct nfs4_closedata
*calldata
= data
;
1814 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1816 nfs4_put_open_state(calldata
->state
);
1817 nfs_free_seqid(calldata
->arg
.seqid
);
1818 nfs4_put_state_owner(sp
);
1819 path_put(&calldata
->path
);
1823 static void nfs4_close_clear_stateid_flags(struct nfs4_state
*state
,
1826 spin_lock(&state
->owner
->so_lock
);
1827 if (!(fmode
& FMODE_READ
))
1828 clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1829 if (!(fmode
& FMODE_WRITE
))
1830 clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1831 clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1832 spin_unlock(&state
->owner
->so_lock
);
1835 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1837 struct nfs4_closedata
*calldata
= data
;
1838 struct nfs4_state
*state
= calldata
->state
;
1839 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1841 nfs4_sequence_done(server
, &calldata
->res
.seq_res
, task
->tk_status
);
1842 if (RPC_ASSASSINATED(task
))
1844 /* hmm. we are done with the inode, and in the process of freeing
1845 * the state_owner. we keep this around to process errors
1847 switch (task
->tk_status
) {
1849 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, 0);
1850 renew_lease(server
, calldata
->timestamp
);
1851 nfs4_close_clear_stateid_flags(state
,
1852 calldata
->arg
.fmode
);
1854 case -NFS4ERR_STALE_STATEID
:
1855 case -NFS4ERR_OLD_STATEID
:
1856 case -NFS4ERR_BAD_STATEID
:
1857 case -NFS4ERR_EXPIRED
:
1858 if (calldata
->arg
.fmode
== 0)
1861 if (nfs4_async_handle_error(task
, server
, state
) == -EAGAIN
)
1862 rpc_restart_call_prepare(task
);
1864 nfs_release_seqid(calldata
->arg
.seqid
);
1865 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1868 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1870 struct nfs4_closedata
*calldata
= data
;
1871 struct nfs4_state
*state
= calldata
->state
;
1874 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1877 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1878 calldata
->arg
.fmode
= FMODE_READ
|FMODE_WRITE
;
1879 spin_lock(&state
->owner
->so_lock
);
1880 /* Calculate the change in open mode */
1881 if (state
->n_rdwr
== 0) {
1882 if (state
->n_rdonly
== 0) {
1883 call_close
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1884 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1885 calldata
->arg
.fmode
&= ~FMODE_READ
;
1887 if (state
->n_wronly
== 0) {
1888 call_close
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1889 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1890 calldata
->arg
.fmode
&= ~FMODE_WRITE
;
1893 spin_unlock(&state
->owner
->so_lock
);
1896 /* Note: exit _without_ calling nfs4_close_done */
1897 task
->tk_action
= NULL
;
1901 if (calldata
->arg
.fmode
== 0)
1902 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
];
1904 nfs_fattr_init(calldata
->res
.fattr
);
1905 calldata
->timestamp
= jiffies
;
1906 if (nfs4_setup_sequence((NFS_SERVER(calldata
->inode
))->nfs_client
,
1907 &calldata
->arg
.seq_args
, &calldata
->res
.seq_res
,
1910 rpc_call_start(task
);
1913 static const struct rpc_call_ops nfs4_close_ops
= {
1914 .rpc_call_prepare
= nfs4_close_prepare
,
1915 .rpc_call_done
= nfs4_close_done
,
1916 .rpc_release
= nfs4_free_closedata
,
1920 * It is possible for data to be read/written from a mem-mapped file
1921 * after the sys_close call (which hits the vfs layer as a flush).
1922 * This means that we can't safely call nfsv4 close on a file until
1923 * the inode is cleared. This in turn means that we are not good
1924 * NFSv4 citizens - we do not indicate to the server to update the file's
1925 * share state even when we are done with one of the three share
1926 * stateid's in the inode.
1928 * NOTE: Caller must be holding the sp->so_owner semaphore!
1930 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
, gfp_t gfp_mask
, int wait
)
1932 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1933 struct nfs4_closedata
*calldata
;
1934 struct nfs4_state_owner
*sp
= state
->owner
;
1935 struct rpc_task
*task
;
1936 struct rpc_message msg
= {
1937 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1938 .rpc_cred
= state
->owner
->so_cred
,
1940 struct rpc_task_setup task_setup_data
= {
1941 .rpc_client
= server
->client
,
1942 .rpc_message
= &msg
,
1943 .callback_ops
= &nfs4_close_ops
,
1944 .workqueue
= nfsiod_workqueue
,
1945 .flags
= RPC_TASK_ASYNC
,
1947 int status
= -ENOMEM
;
1949 calldata
= kzalloc(sizeof(*calldata
), gfp_mask
);
1950 if (calldata
== NULL
)
1952 calldata
->inode
= state
->inode
;
1953 calldata
->state
= state
;
1954 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1955 calldata
->arg
.stateid
= &state
->open_stateid
;
1956 /* Serialization for the sequence id */
1957 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
, gfp_mask
);
1958 if (calldata
->arg
.seqid
== NULL
)
1959 goto out_free_calldata
;
1960 calldata
->arg
.fmode
= 0;
1961 calldata
->arg
.bitmask
= server
->cache_consistency_bitmask
;
1962 calldata
->res
.fattr
= &calldata
->fattr
;
1963 calldata
->res
.seqid
= calldata
->arg
.seqid
;
1964 calldata
->res
.server
= server
;
1965 calldata
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
1967 calldata
->path
= *path
;
1969 msg
.rpc_argp
= &calldata
->arg
,
1970 msg
.rpc_resp
= &calldata
->res
,
1971 task_setup_data
.callback_data
= calldata
;
1972 task
= rpc_run_task(&task_setup_data
);
1974 return PTR_ERR(task
);
1977 status
= rpc_wait_for_completion_task(task
);
1983 nfs4_put_open_state(state
);
1984 nfs4_put_state_owner(sp
);
1988 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
, fmode_t fmode
)
1993 /* If the open_intent is for execute, we have an extra check to make */
1994 if (fmode
& FMODE_EXEC
) {
1995 ret
= nfs_may_open(state
->inode
,
1996 state
->owner
->so_cred
,
1997 nd
->intent
.open
.flags
);
2001 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
2002 if (!IS_ERR(filp
)) {
2003 struct nfs_open_context
*ctx
;
2004 ctx
= nfs_file_open_context(filp
);
2008 ret
= PTR_ERR(filp
);
2010 nfs4_close_sync(path
, state
, fmode
& (FMODE_READ
|FMODE_WRITE
));
2015 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
2017 struct path path
= {
2018 .mnt
= nd
->path
.mnt
,
2021 struct dentry
*parent
;
2023 struct rpc_cred
*cred
;
2024 struct nfs4_state
*state
;
2026 int open_flags
= nd
->intent
.open
.flags
;
2027 fmode_t fmode
= open_flags
& (FMODE_READ
| FMODE_WRITE
| FMODE_EXEC
);
2029 if (nd
->flags
& LOOKUP_CREATE
) {
2030 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
2031 attr
.ia_valid
= ATTR_MODE
;
2032 if (!IS_POSIXACL(dir
))
2033 attr
.ia_mode
&= ~current_umask();
2035 open_flags
&= ~O_EXCL
;
2037 BUG_ON(open_flags
& O_CREAT
);
2040 cred
= rpc_lookup_cred();
2042 return (struct dentry
*)cred
;
2043 parent
= dentry
->d_parent
;
2044 /* Protect against concurrent sillydeletes */
2045 nfs_block_sillyrename(parent
);
2046 state
= nfs4_do_open(dir
, &path
, fmode
, open_flags
, &attr
, cred
);
2048 if (IS_ERR(state
)) {
2049 if (PTR_ERR(state
) == -ENOENT
) {
2050 d_add(dentry
, NULL
);
2051 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2053 nfs_unblock_sillyrename(parent
);
2054 return (struct dentry
*)state
;
2056 res
= d_add_unique(dentry
, igrab(state
->inode
));
2059 nfs_set_verifier(path
.dentry
, nfs_save_change_attribute(dir
));
2060 nfs_unblock_sillyrename(parent
);
2061 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2066 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
2068 struct path path
= {
2069 .mnt
= nd
->path
.mnt
,
2072 struct rpc_cred
*cred
;
2073 struct nfs4_state
*state
;
2074 fmode_t fmode
= openflags
& (FMODE_READ
| FMODE_WRITE
);
2076 cred
= rpc_lookup_cred();
2078 return PTR_ERR(cred
);
2079 state
= nfs4_do_open(dir
, &path
, fmode
, openflags
, NULL
, cred
);
2081 if (IS_ERR(state
)) {
2082 switch (PTR_ERR(state
)) {
2088 return PTR_ERR(state
);
2093 if (state
->inode
== dentry
->d_inode
) {
2094 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2095 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2098 nfs4_close_sync(&path
, state
, fmode
);
2104 static void nfs4_close_context(struct nfs_open_context
*ctx
, int is_sync
)
2106 if (ctx
->state
== NULL
)
2109 nfs4_close_sync(&ctx
->path
, ctx
->state
, ctx
->mode
);
2111 nfs4_close_state(&ctx
->path
, ctx
->state
, ctx
->mode
);
2114 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
2116 struct nfs4_server_caps_arg args
= {
2119 struct nfs4_server_caps_res res
= {};
2120 struct rpc_message msg
= {
2121 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
2127 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2129 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
2130 server
->caps
&= ~(NFS_CAP_ACLS
|NFS_CAP_HARDLINKS
|
2131 NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
2132 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|
2133 NFS_CAP_OWNER_GROUP
|NFS_CAP_ATIME
|
2134 NFS_CAP_CTIME
|NFS_CAP_MTIME
);
2135 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
2136 server
->caps
|= NFS_CAP_ACLS
;
2137 if (res
.has_links
!= 0)
2138 server
->caps
|= NFS_CAP_HARDLINKS
;
2139 if (res
.has_symlinks
!= 0)
2140 server
->caps
|= NFS_CAP_SYMLINKS
;
2141 if (res
.attr_bitmask
[0] & FATTR4_WORD0_FILEID
)
2142 server
->caps
|= NFS_CAP_FILEID
;
2143 if (res
.attr_bitmask
[1] & FATTR4_WORD1_MODE
)
2144 server
->caps
|= NFS_CAP_MODE
;
2145 if (res
.attr_bitmask
[1] & FATTR4_WORD1_NUMLINKS
)
2146 server
->caps
|= NFS_CAP_NLINK
;
2147 if (res
.attr_bitmask
[1] & FATTR4_WORD1_OWNER
)
2148 server
->caps
|= NFS_CAP_OWNER
;
2149 if (res
.attr_bitmask
[1] & FATTR4_WORD1_OWNER_GROUP
)
2150 server
->caps
|= NFS_CAP_OWNER_GROUP
;
2151 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_ACCESS
)
2152 server
->caps
|= NFS_CAP_ATIME
;
2153 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_METADATA
)
2154 server
->caps
|= NFS_CAP_CTIME
;
2155 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_MODIFY
)
2156 server
->caps
|= NFS_CAP_MTIME
;
2158 memcpy(server
->cache_consistency_bitmask
, res
.attr_bitmask
, sizeof(server
->cache_consistency_bitmask
));
2159 server
->cache_consistency_bitmask
[0] &= FATTR4_WORD0_CHANGE
|FATTR4_WORD0_SIZE
;
2160 server
->cache_consistency_bitmask
[1] &= FATTR4_WORD1_TIME_METADATA
|FATTR4_WORD1_TIME_MODIFY
;
2161 server
->acl_bitmask
= res
.acl_bitmask
;
2167 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
2169 struct nfs4_exception exception
= { };
2172 err
= nfs4_handle_exception(server
,
2173 _nfs4_server_capabilities(server
, fhandle
),
2175 } while (exception
.retry
);
2179 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2180 struct nfs_fsinfo
*info
)
2182 struct nfs4_lookup_root_arg args
= {
2183 .bitmask
= nfs4_fattr_bitmap
,
2185 struct nfs4_lookup_res res
= {
2187 .fattr
= info
->fattr
,
2190 struct rpc_message msg
= {
2191 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
2196 nfs_fattr_init(info
->fattr
);
2197 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2200 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2201 struct nfs_fsinfo
*info
)
2203 struct nfs4_exception exception
= { };
2206 err
= nfs4_handle_exception(server
,
2207 _nfs4_lookup_root(server
, fhandle
, info
),
2209 } while (exception
.retry
);
2214 * get the file handle for the "/" directory on the server
2216 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2217 struct nfs_fsinfo
*info
)
2221 status
= nfs4_lookup_root(server
, fhandle
, info
);
2223 status
= nfs4_server_capabilities(server
, fhandle
);
2225 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
2226 return nfs4_map_errors(status
);
2230 * Get locations and (maybe) other attributes of a referral.
2231 * Note that we'll actually follow the referral later when
2232 * we detect fsid mismatch in inode revalidation
2234 static int nfs4_get_referral(struct inode
*dir
, const struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
2236 int status
= -ENOMEM
;
2237 struct page
*page
= NULL
;
2238 struct nfs4_fs_locations
*locations
= NULL
;
2240 page
= alloc_page(GFP_KERNEL
);
2243 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
2244 if (locations
== NULL
)
2247 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
2250 /* Make sure server returned a different fsid for the referral */
2251 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
2252 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__
, name
->name
);
2257 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
2258 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
2260 fattr
->mode
= S_IFDIR
;
2261 memset(fhandle
, 0, sizeof(struct nfs_fh
));
2270 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2272 struct nfs4_getattr_arg args
= {
2274 .bitmask
= server
->attr_bitmask
,
2276 struct nfs4_getattr_res res
= {
2280 struct rpc_message msg
= {
2281 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
2286 nfs_fattr_init(fattr
);
2287 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2290 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2292 struct nfs4_exception exception
= { };
2295 err
= nfs4_handle_exception(server
,
2296 _nfs4_proc_getattr(server
, fhandle
, fattr
),
2298 } while (exception
.retry
);
2303 * The file is not closed if it is opened due to the a request to change
2304 * the size of the file. The open call will not be needed once the
2305 * VFS layer lookup-intents are implemented.
2307 * Close is called when the inode is destroyed.
2308 * If we haven't opened the file for O_WRONLY, we
2309 * need to in the size_change case to obtain a stateid.
2312 * Because OPEN is always done by name in nfsv4, it is
2313 * possible that we opened a different file by the same
2314 * name. We can recognize this race condition, but we
2315 * can't do anything about it besides returning an error.
2317 * This will be fixed with VFS changes (lookup-intent).
2320 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
2321 struct iattr
*sattr
)
2323 struct inode
*inode
= dentry
->d_inode
;
2324 struct rpc_cred
*cred
= NULL
;
2325 struct nfs4_state
*state
= NULL
;
2328 nfs_fattr_init(fattr
);
2330 /* Search for an existing open(O_WRITE) file */
2331 if (sattr
->ia_valid
& ATTR_FILE
) {
2332 struct nfs_open_context
*ctx
;
2334 ctx
= nfs_file_open_context(sattr
->ia_file
);
2341 status
= nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
);
2343 nfs_setattr_update_inode(inode
, sattr
);
2347 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, const struct nfs_fh
*dirfh
,
2348 const struct qstr
*name
, struct nfs_fh
*fhandle
,
2349 struct nfs_fattr
*fattr
)
2352 struct nfs4_lookup_arg args
= {
2353 .bitmask
= server
->attr_bitmask
,
2357 struct nfs4_lookup_res res
= {
2362 struct rpc_message msg
= {
2363 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
2368 nfs_fattr_init(fattr
);
2370 dprintk("NFS call lookupfh %s\n", name
->name
);
2371 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2372 dprintk("NFS reply lookupfh: %d\n", status
);
2376 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
2377 struct qstr
*name
, struct nfs_fh
*fhandle
,
2378 struct nfs_fattr
*fattr
)
2380 struct nfs4_exception exception
= { };
2383 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
2385 if (err
== -NFS4ERR_MOVED
) {
2389 err
= nfs4_handle_exception(server
, err
, &exception
);
2390 } while (exception
.retry
);
2394 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
,
2395 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2399 dprintk("NFS call lookup %s\n", name
->name
);
2400 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
2401 if (status
== -NFS4ERR_MOVED
)
2402 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
2403 dprintk("NFS reply lookup: %d\n", status
);
2407 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2409 struct nfs4_exception exception
= { };
2412 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2413 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
2415 } while (exception
.retry
);
2419 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
2421 struct nfs_server
*server
= NFS_SERVER(inode
);
2422 struct nfs4_accessargs args
= {
2423 .fh
= NFS_FH(inode
),
2424 .bitmask
= server
->attr_bitmask
,
2426 struct nfs4_accessres res
= {
2429 struct rpc_message msg
= {
2430 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
2433 .rpc_cred
= entry
->cred
,
2435 int mode
= entry
->mask
;
2439 * Determine which access bits we want to ask for...
2441 if (mode
& MAY_READ
)
2442 args
.access
|= NFS4_ACCESS_READ
;
2443 if (S_ISDIR(inode
->i_mode
)) {
2444 if (mode
& MAY_WRITE
)
2445 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
2446 if (mode
& MAY_EXEC
)
2447 args
.access
|= NFS4_ACCESS_LOOKUP
;
2449 if (mode
& MAY_WRITE
)
2450 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
2451 if (mode
& MAY_EXEC
)
2452 args
.access
|= NFS4_ACCESS_EXECUTE
;
2455 res
.fattr
= nfs_alloc_fattr();
2456 if (res
.fattr
== NULL
)
2459 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2462 if (res
.access
& NFS4_ACCESS_READ
)
2463 entry
->mask
|= MAY_READ
;
2464 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
2465 entry
->mask
|= MAY_WRITE
;
2466 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
2467 entry
->mask
|= MAY_EXEC
;
2468 nfs_refresh_inode(inode
, res
.fattr
);
2470 nfs_free_fattr(res
.fattr
);
2474 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
2476 struct nfs4_exception exception
= { };
2479 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2480 _nfs4_proc_access(inode
, entry
),
2482 } while (exception
.retry
);
2487 * TODO: For the time being, we don't try to get any attributes
2488 * along with any of the zero-copy operations READ, READDIR,
2491 * In the case of the first three, we want to put the GETATTR
2492 * after the read-type operation -- this is because it is hard
2493 * to predict the length of a GETATTR response in v4, and thus
2494 * align the READ data correctly. This means that the GETATTR
2495 * may end up partially falling into the page cache, and we should
2496 * shift it into the 'tail' of the xdr_buf before processing.
2497 * To do this efficiently, we need to know the total length
2498 * of data received, which doesn't seem to be available outside
2501 * In the case of WRITE, we also want to put the GETATTR after
2502 * the operation -- in this case because we want to make sure
2503 * we get the post-operation mtime and size. This means that
2504 * we can't use xdr_encode_pages() as written: we need a variant
2505 * of it which would leave room in the 'tail' iovec.
2507 * Both of these changes to the XDR layer would in fact be quite
2508 * minor, but I decided to leave them for a subsequent patch.
2510 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2511 unsigned int pgbase
, unsigned int pglen
)
2513 struct nfs4_readlink args
= {
2514 .fh
= NFS_FH(inode
),
2519 struct nfs4_readlink_res res
;
2520 struct rpc_message msg
= {
2521 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
2526 return nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
2529 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2530 unsigned int pgbase
, unsigned int pglen
)
2532 struct nfs4_exception exception
= { };
2535 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2536 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
2538 } while (exception
.retry
);
2544 * We will need to arrange for the VFS layer to provide an atomic open.
2545 * Until then, this create/open method is prone to inefficiency and race
2546 * conditions due to the lookup, create, and open VFS calls from sys_open()
2547 * placed on the wire.
2549 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2550 * The file will be opened again in the subsequent VFS open call
2551 * (nfs4_proc_file_open).
2553 * The open for read will just hang around to be used by any process that
2554 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2558 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
2559 int flags
, struct nameidata
*nd
)
2561 struct path path
= {
2562 .mnt
= nd
->path
.mnt
,
2565 struct nfs4_state
*state
;
2566 struct rpc_cred
*cred
;
2567 fmode_t fmode
= flags
& (FMODE_READ
| FMODE_WRITE
);
2570 cred
= rpc_lookup_cred();
2572 status
= PTR_ERR(cred
);
2575 state
= nfs4_do_open(dir
, &path
, fmode
, flags
, sattr
, cred
);
2577 if (IS_ERR(state
)) {
2578 status
= PTR_ERR(state
);
2581 d_add(dentry
, igrab(state
->inode
));
2582 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2583 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
2584 status
= nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2586 nfs4_close_sync(&path
, state
, fmode
);
2593 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2595 struct nfs_server
*server
= NFS_SERVER(dir
);
2596 struct nfs_removeargs args
= {
2598 .name
.len
= name
->len
,
2599 .name
.name
= name
->name
,
2600 .bitmask
= server
->attr_bitmask
,
2602 struct nfs_removeres res
= {
2605 struct rpc_message msg
= {
2606 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
2610 int status
= -ENOMEM
;
2612 res
.dir_attr
= nfs_alloc_fattr();
2613 if (res
.dir_attr
== NULL
)
2616 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 1);
2618 update_changeattr(dir
, &res
.cinfo
);
2619 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2621 nfs_free_fattr(res
.dir_attr
);
2626 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2628 struct nfs4_exception exception
= { };
2631 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2632 _nfs4_proc_remove(dir
, name
),
2634 } while (exception
.retry
);
2638 static void nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct inode
*dir
)
2640 struct nfs_server
*server
= NFS_SERVER(dir
);
2641 struct nfs_removeargs
*args
= msg
->rpc_argp
;
2642 struct nfs_removeres
*res
= msg
->rpc_resp
;
2644 args
->bitmask
= server
->cache_consistency_bitmask
;
2645 res
->server
= server
;
2646 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
2649 static int nfs4_proc_unlink_done(struct rpc_task
*task
, struct inode
*dir
)
2651 struct nfs_removeres
*res
= task
->tk_msg
.rpc_resp
;
2653 nfs4_sequence_done(res
->server
, &res
->seq_res
, task
->tk_status
);
2654 if (nfs4_async_handle_error(task
, res
->server
, NULL
) == -EAGAIN
)
2656 update_changeattr(dir
, &res
->cinfo
);
2657 nfs_post_op_update_inode(dir
, res
->dir_attr
);
2661 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2662 struct inode
*new_dir
, struct qstr
*new_name
)
2664 struct nfs_server
*server
= NFS_SERVER(old_dir
);
2665 struct nfs4_rename_arg arg
= {
2666 .old_dir
= NFS_FH(old_dir
),
2667 .new_dir
= NFS_FH(new_dir
),
2668 .old_name
= old_name
,
2669 .new_name
= new_name
,
2670 .bitmask
= server
->attr_bitmask
,
2672 struct nfs4_rename_res res
= {
2675 struct rpc_message msg
= {
2676 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2680 int status
= -ENOMEM
;
2682 res
.old_fattr
= nfs_alloc_fattr();
2683 res
.new_fattr
= nfs_alloc_fattr();
2684 if (res
.old_fattr
== NULL
|| res
.new_fattr
== NULL
)
2687 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2689 update_changeattr(old_dir
, &res
.old_cinfo
);
2690 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2691 update_changeattr(new_dir
, &res
.new_cinfo
);
2692 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2695 nfs_free_fattr(res
.new_fattr
);
2696 nfs_free_fattr(res
.old_fattr
);
2700 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2701 struct inode
*new_dir
, struct qstr
*new_name
)
2703 struct nfs4_exception exception
= { };
2706 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2707 _nfs4_proc_rename(old_dir
, old_name
,
2710 } while (exception
.retry
);
2714 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2716 struct nfs_server
*server
= NFS_SERVER(inode
);
2717 struct nfs4_link_arg arg
= {
2718 .fh
= NFS_FH(inode
),
2719 .dir_fh
= NFS_FH(dir
),
2721 .bitmask
= server
->attr_bitmask
,
2723 struct nfs4_link_res res
= {
2726 struct rpc_message msg
= {
2727 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2731 int status
= -ENOMEM
;
2733 res
.fattr
= nfs_alloc_fattr();
2734 res
.dir_attr
= nfs_alloc_fattr();
2735 if (res
.fattr
== NULL
|| res
.dir_attr
== NULL
)
2738 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2740 update_changeattr(dir
, &res
.cinfo
);
2741 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2742 nfs_post_op_update_inode(inode
, res
.fattr
);
2745 nfs_free_fattr(res
.dir_attr
);
2746 nfs_free_fattr(res
.fattr
);
2750 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2752 struct nfs4_exception exception
= { };
2755 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2756 _nfs4_proc_link(inode
, dir
, name
),
2758 } while (exception
.retry
);
2762 struct nfs4_createdata
{
2763 struct rpc_message msg
;
2764 struct nfs4_create_arg arg
;
2765 struct nfs4_create_res res
;
2767 struct nfs_fattr fattr
;
2768 struct nfs_fattr dir_fattr
;
2771 static struct nfs4_createdata
*nfs4_alloc_createdata(struct inode
*dir
,
2772 struct qstr
*name
, struct iattr
*sattr
, u32 ftype
)
2774 struct nfs4_createdata
*data
;
2776 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
2778 struct nfs_server
*server
= NFS_SERVER(dir
);
2780 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
];
2781 data
->msg
.rpc_argp
= &data
->arg
;
2782 data
->msg
.rpc_resp
= &data
->res
;
2783 data
->arg
.dir_fh
= NFS_FH(dir
);
2784 data
->arg
.server
= server
;
2785 data
->arg
.name
= name
;
2786 data
->arg
.attrs
= sattr
;
2787 data
->arg
.ftype
= ftype
;
2788 data
->arg
.bitmask
= server
->attr_bitmask
;
2789 data
->res
.server
= server
;
2790 data
->res
.fh
= &data
->fh
;
2791 data
->res
.fattr
= &data
->fattr
;
2792 data
->res
.dir_fattr
= &data
->dir_fattr
;
2793 nfs_fattr_init(data
->res
.fattr
);
2794 nfs_fattr_init(data
->res
.dir_fattr
);
2799 static int nfs4_do_create(struct inode
*dir
, struct dentry
*dentry
, struct nfs4_createdata
*data
)
2801 int status
= nfs4_call_sync(NFS_SERVER(dir
), &data
->msg
,
2802 &data
->arg
, &data
->res
, 1);
2804 update_changeattr(dir
, &data
->res
.dir_cinfo
);
2805 nfs_post_op_update_inode(dir
, data
->res
.dir_fattr
);
2806 status
= nfs_instantiate(dentry
, data
->res
.fh
, data
->res
.fattr
);
2811 static void nfs4_free_createdata(struct nfs4_createdata
*data
)
2816 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2817 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2819 struct nfs4_createdata
*data
;
2820 int status
= -ENAMETOOLONG
;
2822 if (len
> NFS4_MAXPATHLEN
)
2826 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4LNK
);
2830 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
];
2831 data
->arg
.u
.symlink
.pages
= &page
;
2832 data
->arg
.u
.symlink
.len
= len
;
2834 status
= nfs4_do_create(dir
, dentry
, data
);
2836 nfs4_free_createdata(data
);
2841 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2842 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2844 struct nfs4_exception exception
= { };
2847 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2848 _nfs4_proc_symlink(dir
, dentry
, page
,
2851 } while (exception
.retry
);
2855 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2856 struct iattr
*sattr
)
2858 struct nfs4_createdata
*data
;
2859 int status
= -ENOMEM
;
2861 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4DIR
);
2865 status
= nfs4_do_create(dir
, dentry
, data
);
2867 nfs4_free_createdata(data
);
2872 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2873 struct iattr
*sattr
)
2875 struct nfs4_exception exception
= { };
2878 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2879 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2881 } while (exception
.retry
);
2885 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2886 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2888 struct inode
*dir
= dentry
->d_inode
;
2889 struct nfs4_readdir_arg args
= {
2894 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
2896 struct nfs4_readdir_res res
;
2897 struct rpc_message msg
= {
2898 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2905 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__
,
2906 dentry
->d_parent
->d_name
.name
,
2907 dentry
->d_name
.name
,
2908 (unsigned long long)cookie
);
2909 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2910 res
.pgbase
= args
.pgbase
;
2911 status
= nfs4_call_sync(NFS_SERVER(dir
), &msg
, &args
, &res
, 0);
2913 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2915 nfs_invalidate_atime(dir
);
2917 dprintk("%s: returns %d\n", __func__
, status
);
2921 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2922 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2924 struct nfs4_exception exception
= { };
2927 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2928 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2931 } while (exception
.retry
);
2935 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2936 struct iattr
*sattr
, dev_t rdev
)
2938 struct nfs4_createdata
*data
;
2939 int mode
= sattr
->ia_mode
;
2940 int status
= -ENOMEM
;
2942 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2943 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2945 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4SOCK
);
2950 data
->arg
.ftype
= NF4FIFO
;
2951 else if (S_ISBLK(mode
)) {
2952 data
->arg
.ftype
= NF4BLK
;
2953 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2954 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2956 else if (S_ISCHR(mode
)) {
2957 data
->arg
.ftype
= NF4CHR
;
2958 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2959 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2962 status
= nfs4_do_create(dir
, dentry
, data
);
2964 nfs4_free_createdata(data
);
2969 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2970 struct iattr
*sattr
, dev_t rdev
)
2972 struct nfs4_exception exception
= { };
2975 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2976 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2978 } while (exception
.retry
);
2982 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2983 struct nfs_fsstat
*fsstat
)
2985 struct nfs4_statfs_arg args
= {
2987 .bitmask
= server
->attr_bitmask
,
2989 struct nfs4_statfs_res res
= {
2992 struct rpc_message msg
= {
2993 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2998 nfs_fattr_init(fsstat
->fattr
);
2999 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
3002 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
3004 struct nfs4_exception exception
= { };
3007 err
= nfs4_handle_exception(server
,
3008 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
3010 } while (exception
.retry
);
3014 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3015 struct nfs_fsinfo
*fsinfo
)
3017 struct nfs4_fsinfo_arg args
= {
3019 .bitmask
= server
->attr_bitmask
,
3021 struct nfs4_fsinfo_res res
= {
3024 struct rpc_message msg
= {
3025 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
3030 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
3033 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
3035 struct nfs4_exception exception
= { };
3039 err
= nfs4_handle_exception(server
,
3040 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
3042 } while (exception
.retry
);
3046 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
3048 nfs_fattr_init(fsinfo
->fattr
);
3049 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
3052 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3053 struct nfs_pathconf
*pathconf
)
3055 struct nfs4_pathconf_arg args
= {
3057 .bitmask
= server
->attr_bitmask
,
3059 struct nfs4_pathconf_res res
= {
3060 .pathconf
= pathconf
,
3062 struct rpc_message msg
= {
3063 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
3068 /* None of the pathconf attributes are mandatory to implement */
3069 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
3070 memset(pathconf
, 0, sizeof(*pathconf
));
3074 nfs_fattr_init(pathconf
->fattr
);
3075 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
3078 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3079 struct nfs_pathconf
*pathconf
)
3081 struct nfs4_exception exception
= { };
3085 err
= nfs4_handle_exception(server
,
3086 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
3088 } while (exception
.retry
);
3092 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
3094 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
3096 dprintk("--> %s\n", __func__
);
3098 nfs4_sequence_done(server
, &data
->res
.seq_res
, task
->tk_status
);
3100 if (nfs4_async_handle_error(task
, server
, data
->args
.context
->state
) == -EAGAIN
) {
3101 nfs_restart_rpc(task
, server
->nfs_client
);
3105 nfs_invalidate_atime(data
->inode
);
3106 if (task
->tk_status
> 0)
3107 renew_lease(server
, data
->timestamp
);
3111 static void nfs4_proc_read_setup(struct nfs_read_data
*data
, struct rpc_message
*msg
)
3113 data
->timestamp
= jiffies
;
3114 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
];
3117 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
3119 struct inode
*inode
= data
->inode
;
3121 nfs4_sequence_done(NFS_SERVER(inode
), &data
->res
.seq_res
,
3124 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), data
->args
.context
->state
) == -EAGAIN
) {
3125 nfs_restart_rpc(task
, NFS_SERVER(inode
)->nfs_client
);
3128 if (task
->tk_status
>= 0) {
3129 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
3130 nfs_post_op_update_inode_force_wcc(inode
, data
->res
.fattr
);
3135 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
3137 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
3139 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
3140 data
->res
.server
= server
;
3141 data
->timestamp
= jiffies
;
3143 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
];
3146 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
3148 struct inode
*inode
= data
->inode
;
3150 nfs4_sequence_done(NFS_SERVER(inode
), &data
->res
.seq_res
,
3152 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), NULL
) == -EAGAIN
) {
3153 nfs_restart_rpc(task
, NFS_SERVER(inode
)->nfs_client
);
3156 nfs_refresh_inode(inode
, data
->res
.fattr
);
3160 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
3162 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
3164 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
3165 data
->res
.server
= server
;
3166 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
];
3169 struct nfs4_renewdata
{
3170 struct nfs_client
*client
;
3171 unsigned long timestamp
;
3175 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3176 * standalone procedure for queueing an asynchronous RENEW.
3178 static void nfs4_renew_release(void *calldata
)
3180 struct nfs4_renewdata
*data
= calldata
;
3181 struct nfs_client
*clp
= data
->client
;
3183 if (atomic_read(&clp
->cl_count
) > 1)
3184 nfs4_schedule_state_renewal(clp
);
3185 nfs_put_client(clp
);
3189 static void nfs4_renew_done(struct rpc_task
*task
, void *calldata
)
3191 struct nfs4_renewdata
*data
= calldata
;
3192 struct nfs_client
*clp
= data
->client
;
3193 unsigned long timestamp
= data
->timestamp
;
3195 if (task
->tk_status
< 0) {
3196 /* Unless we're shutting down, schedule state recovery! */
3197 if (test_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
) != 0)
3198 nfs4_schedule_state_recovery(clp
);
3201 spin_lock(&clp
->cl_lock
);
3202 if (time_before(clp
->cl_last_renewal
,timestamp
))
3203 clp
->cl_last_renewal
= timestamp
;
3204 spin_unlock(&clp
->cl_lock
);
3207 static const struct rpc_call_ops nfs4_renew_ops
= {
3208 .rpc_call_done
= nfs4_renew_done
,
3209 .rpc_release
= nfs4_renew_release
,
3212 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3214 struct rpc_message msg
= {
3215 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
3219 struct nfs4_renewdata
*data
;
3221 if (!atomic_inc_not_zero(&clp
->cl_count
))
3223 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3227 data
->timestamp
= jiffies
;
3228 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
3229 &nfs4_renew_ops
, data
);
3232 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3234 struct rpc_message msg
= {
3235 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
3239 unsigned long now
= jiffies
;
3242 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3245 spin_lock(&clp
->cl_lock
);
3246 if (time_before(clp
->cl_last_renewal
,now
))
3247 clp
->cl_last_renewal
= now
;
3248 spin_unlock(&clp
->cl_lock
);
3252 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
3254 return (server
->caps
& NFS_CAP_ACLS
)
3255 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
3256 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
3259 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3260 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3263 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3265 static void buf_to_pages(const void *buf
, size_t buflen
,
3266 struct page
**pages
, unsigned int *pgbase
)
3268 const void *p
= buf
;
3270 *pgbase
= offset_in_page(buf
);
3272 while (p
< buf
+ buflen
) {
3273 *(pages
++) = virt_to_page(p
);
3274 p
+= PAGE_CACHE_SIZE
;
3278 static int buf_to_pages_noslab(const void *buf
, size_t buflen
,
3279 struct page
**pages
, unsigned int *pgbase
)
3281 struct page
*newpage
, **spages
;
3287 len
= min_t(size_t, PAGE_CACHE_SIZE
, buflen
);
3288 newpage
= alloc_page(GFP_KERNEL
);
3290 if (newpage
== NULL
)
3292 memcpy(page_address(newpage
), buf
, len
);
3297 } while (buflen
!= 0);
3303 __free_page(spages
[rc
-1]);
3307 struct nfs4_cached_acl
{
3313 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
3315 struct nfs_inode
*nfsi
= NFS_I(inode
);
3317 spin_lock(&inode
->i_lock
);
3318 kfree(nfsi
->nfs4_acl
);
3319 nfsi
->nfs4_acl
= acl
;
3320 spin_unlock(&inode
->i_lock
);
3323 static void nfs4_zap_acl_attr(struct inode
*inode
)
3325 nfs4_set_cached_acl(inode
, NULL
);
3328 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
3330 struct nfs_inode
*nfsi
= NFS_I(inode
);
3331 struct nfs4_cached_acl
*acl
;
3334 spin_lock(&inode
->i_lock
);
3335 acl
= nfsi
->nfs4_acl
;
3338 if (buf
== NULL
) /* user is just asking for length */
3340 if (acl
->cached
== 0)
3342 ret
= -ERANGE
; /* see getxattr(2) man page */
3343 if (acl
->len
> buflen
)
3345 memcpy(buf
, acl
->data
, acl
->len
);
3349 spin_unlock(&inode
->i_lock
);
3353 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
3355 struct nfs4_cached_acl
*acl
;
3357 if (buf
&& acl_len
<= PAGE_SIZE
) {
3358 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
3362 memcpy(acl
->data
, buf
, acl_len
);
3364 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
3371 nfs4_set_cached_acl(inode
, acl
);
3374 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3376 struct page
*pages
[NFS4ACL_MAXPAGES
];
3377 struct nfs_getaclargs args
= {
3378 .fh
= NFS_FH(inode
),
3382 struct nfs_getaclres res
= {
3386 struct rpc_message msg
= {
3387 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
3391 struct page
*localpage
= NULL
;
3394 if (buflen
< PAGE_SIZE
) {
3395 /* As long as we're doing a round trip to the server anyway,
3396 * let's be prepared for a page of acl data. */
3397 localpage
= alloc_page(GFP_KERNEL
);
3398 resp_buf
= page_address(localpage
);
3399 if (localpage
== NULL
)
3401 args
.acl_pages
[0] = localpage
;
3402 args
.acl_pgbase
= 0;
3403 args
.acl_len
= PAGE_SIZE
;
3406 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
3408 ret
= nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
3411 if (res
.acl_len
> args
.acl_len
)
3412 nfs4_write_cached_acl(inode
, NULL
, res
.acl_len
);
3414 nfs4_write_cached_acl(inode
, resp_buf
, res
.acl_len
);
3417 if (res
.acl_len
> buflen
)
3420 memcpy(buf
, resp_buf
, res
.acl_len
);
3425 __free_page(localpage
);
3429 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3431 struct nfs4_exception exception
= { };
3434 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
3437 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
3438 } while (exception
.retry
);
3442 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
3444 struct nfs_server
*server
= NFS_SERVER(inode
);
3447 if (!nfs4_server_supports_acls(server
))
3449 ret
= nfs_revalidate_inode(server
, inode
);
3452 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
3455 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
3458 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3460 struct nfs_server
*server
= NFS_SERVER(inode
);
3461 struct page
*pages
[NFS4ACL_MAXPAGES
];
3462 struct nfs_setaclargs arg
= {
3463 .fh
= NFS_FH(inode
),
3467 struct nfs_setaclres res
;
3468 struct rpc_message msg
= {
3469 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
3475 if (!nfs4_server_supports_acls(server
))
3477 i
= buf_to_pages_noslab(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
3480 nfs_inode_return_delegation(inode
);
3481 ret
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
3484 * Free each page after tx, so the only ref left is
3485 * held by the network stack
3488 put_page(pages
[i
-1]);
3490 nfs_access_zap_cache(inode
);
3491 nfs_zap_acl_cache(inode
);
3495 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3497 struct nfs4_exception exception
= { };
3500 err
= nfs4_handle_exception(NFS_SERVER(inode
),
3501 __nfs4_proc_set_acl(inode
, buf
, buflen
),
3503 } while (exception
.retry
);
3508 _nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs_client
*clp
, struct nfs4_state
*state
)
3510 if (!clp
|| task
->tk_status
>= 0)
3512 switch(task
->tk_status
) {
3513 case -NFS4ERR_ADMIN_REVOKED
:
3514 case -NFS4ERR_BAD_STATEID
:
3515 case -NFS4ERR_OPENMODE
:
3518 nfs4_state_mark_reclaim_nograce(clp
, state
);
3519 goto do_state_recovery
;
3520 case -NFS4ERR_STALE_STATEID
:
3521 case -NFS4ERR_STALE_CLIENTID
:
3522 case -NFS4ERR_EXPIRED
:
3523 goto do_state_recovery
;
3524 #if defined(CONFIG_NFS_V4_1)
3525 case -NFS4ERR_BADSESSION
:
3526 case -NFS4ERR_BADSLOT
:
3527 case -NFS4ERR_BAD_HIGH_SLOT
:
3528 case -NFS4ERR_DEADSESSION
:
3529 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
3530 case -NFS4ERR_SEQ_FALSE_RETRY
:
3531 case -NFS4ERR_SEQ_MISORDERED
:
3532 dprintk("%s ERROR %d, Reset session\n", __func__
,
3534 nfs4_schedule_state_recovery(clp
);
3535 task
->tk_status
= 0;
3537 #endif /* CONFIG_NFS_V4_1 */
3538 case -NFS4ERR_DELAY
:
3540 nfs_inc_server_stats(server
, NFSIOS_DELAY
);
3541 case -NFS4ERR_GRACE
:
3543 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
3544 task
->tk_status
= 0;
3546 case -NFS4ERR_OLD_STATEID
:
3547 task
->tk_status
= 0;
3550 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
3553 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
);
3554 nfs4_schedule_state_recovery(clp
);
3555 if (test_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) == 0)
3556 rpc_wake_up_queued_task(&clp
->cl_rpcwaitq
, task
);
3557 task
->tk_status
= 0;
3562 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs4_state
*state
)
3564 return _nfs4_async_handle_error(task
, server
, server
->nfs_client
, state
);
3567 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
,
3568 unsigned short port
, struct rpc_cred
*cred
,
3569 struct nfs4_setclientid_res
*res
)
3571 nfs4_verifier sc_verifier
;
3572 struct nfs4_setclientid setclientid
= {
3573 .sc_verifier
= &sc_verifier
,
3576 struct rpc_message msg
= {
3577 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
3578 .rpc_argp
= &setclientid
,
3586 p
= (__be32
*)sc_verifier
.data
;
3587 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
3588 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
3591 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
3592 sizeof(setclientid
.sc_name
), "%s/%s %s %s %u",
3594 rpc_peeraddr2str(clp
->cl_rpcclient
,
3596 rpc_peeraddr2str(clp
->cl_rpcclient
,
3598 clp
->cl_rpcclient
->cl_auth
->au_ops
->au_name
,
3599 clp
->cl_id_uniquifier
);
3600 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
3601 sizeof(setclientid
.sc_netid
),
3602 rpc_peeraddr2str(clp
->cl_rpcclient
,
3603 RPC_DISPLAY_NETID
));
3604 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
3605 sizeof(setclientid
.sc_uaddr
), "%s.%u.%u",
3606 clp
->cl_ipaddr
, port
>> 8, port
& 255);
3608 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3609 if (status
!= -NFS4ERR_CLID_INUSE
)
3614 ssleep(clp
->cl_lease_time
+ 1);
3616 if (++clp
->cl_id_uniquifier
== 0)
3622 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
,
3623 struct nfs4_setclientid_res
*arg
,
3624 struct rpc_cred
*cred
)
3626 struct nfs_fsinfo fsinfo
;
3627 struct rpc_message msg
= {
3628 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
3630 .rpc_resp
= &fsinfo
,
3637 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3639 spin_lock(&clp
->cl_lock
);
3640 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
3641 clp
->cl_last_renewal
= now
;
3642 spin_unlock(&clp
->cl_lock
);
3647 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
,
3648 struct nfs4_setclientid_res
*arg
,
3649 struct rpc_cred
*cred
)
3654 err
= _nfs4_proc_setclientid_confirm(clp
, arg
, cred
);
3658 case -NFS4ERR_RESOURCE
:
3659 /* The IBM lawyers misread another document! */
3660 case -NFS4ERR_DELAY
:
3662 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
3668 struct nfs4_delegreturndata
{
3669 struct nfs4_delegreturnargs args
;
3670 struct nfs4_delegreturnres res
;
3672 nfs4_stateid stateid
;
3673 unsigned long timestamp
;
3674 struct nfs_fattr fattr
;
3678 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3680 struct nfs4_delegreturndata
*data
= calldata
;
3682 nfs4_sequence_done(data
->res
.server
, &data
->res
.seq_res
,
3685 switch (task
->tk_status
) {
3686 case -NFS4ERR_STALE_STATEID
:
3687 case -NFS4ERR_EXPIRED
:
3689 renew_lease(data
->res
.server
, data
->timestamp
);
3692 if (nfs4_async_handle_error(task
, data
->res
.server
, NULL
) ==
3694 nfs_restart_rpc(task
, data
->res
.server
->nfs_client
);
3698 data
->rpc_status
= task
->tk_status
;
3701 static void nfs4_delegreturn_release(void *calldata
)
3706 #if defined(CONFIG_NFS_V4_1)
3707 static void nfs4_delegreturn_prepare(struct rpc_task
*task
, void *data
)
3709 struct nfs4_delegreturndata
*d_data
;
3711 d_data
= (struct nfs4_delegreturndata
*)data
;
3713 if (nfs4_setup_sequence(d_data
->res
.server
->nfs_client
,
3714 &d_data
->args
.seq_args
,
3715 &d_data
->res
.seq_res
, 1, task
))
3717 rpc_call_start(task
);
3719 #endif /* CONFIG_NFS_V4_1 */
3721 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3722 #if defined(CONFIG_NFS_V4_1)
3723 .rpc_call_prepare
= nfs4_delegreturn_prepare
,
3724 #endif /* CONFIG_NFS_V4_1 */
3725 .rpc_call_done
= nfs4_delegreturn_done
,
3726 .rpc_release
= nfs4_delegreturn_release
,
3729 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3731 struct nfs4_delegreturndata
*data
;
3732 struct nfs_server
*server
= NFS_SERVER(inode
);
3733 struct rpc_task
*task
;
3734 struct rpc_message msg
= {
3735 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3738 struct rpc_task_setup task_setup_data
= {
3739 .rpc_client
= server
->client
,
3740 .rpc_message
= &msg
,
3741 .callback_ops
= &nfs4_delegreturn_ops
,
3742 .flags
= RPC_TASK_ASYNC
,
3746 data
= kzalloc(sizeof(*data
), GFP_NOFS
);
3749 data
->args
.fhandle
= &data
->fh
;
3750 data
->args
.stateid
= &data
->stateid
;
3751 data
->args
.bitmask
= server
->attr_bitmask
;
3752 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3753 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3754 data
->res
.fattr
= &data
->fattr
;
3755 data
->res
.server
= server
;
3756 data
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3757 nfs_fattr_init(data
->res
.fattr
);
3758 data
->timestamp
= jiffies
;
3759 data
->rpc_status
= 0;
3761 task_setup_data
.callback_data
= data
;
3762 msg
.rpc_argp
= &data
->args
,
3763 msg
.rpc_resp
= &data
->res
,
3764 task
= rpc_run_task(&task_setup_data
);
3766 return PTR_ERR(task
);
3769 status
= nfs4_wait_for_completion_rpc_task(task
);
3772 status
= data
->rpc_status
;
3775 nfs_refresh_inode(inode
, &data
->fattr
);
3781 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3783 struct nfs_server
*server
= NFS_SERVER(inode
);
3784 struct nfs4_exception exception
= { };
3787 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
, issync
);
3789 case -NFS4ERR_STALE_STATEID
:
3790 case -NFS4ERR_EXPIRED
:
3794 err
= nfs4_handle_exception(server
, err
, &exception
);
3795 } while (exception
.retry
);
3799 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3800 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3803 * sleep, with exponential backoff, and retry the LOCK operation.
3805 static unsigned long
3806 nfs4_set_lock_task_retry(unsigned long timeout
)
3808 schedule_timeout_killable(timeout
);
3810 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3811 return NFS4_LOCK_MAXTIMEOUT
;
3815 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3817 struct inode
*inode
= state
->inode
;
3818 struct nfs_server
*server
= NFS_SERVER(inode
);
3819 struct nfs_client
*clp
= server
->nfs_client
;
3820 struct nfs_lockt_args arg
= {
3821 .fh
= NFS_FH(inode
),
3824 struct nfs_lockt_res res
= {
3827 struct rpc_message msg
= {
3828 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3831 .rpc_cred
= state
->owner
->so_cred
,
3833 struct nfs4_lock_state
*lsp
;
3836 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3837 status
= nfs4_set_lock_state(state
, request
);
3840 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3841 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3842 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
3845 request
->fl_type
= F_UNLCK
;
3847 case -NFS4ERR_DENIED
:
3850 request
->fl_ops
->fl_release_private(request
);
3855 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3857 struct nfs4_exception exception
= { };
3861 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3862 _nfs4_proc_getlk(state
, cmd
, request
),
3864 } while (exception
.retry
);
3868 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3871 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3873 res
= posix_lock_file_wait(file
, fl
);
3876 res
= flock_lock_file_wait(file
, fl
);
3884 struct nfs4_unlockdata
{
3885 struct nfs_locku_args arg
;
3886 struct nfs_locku_res res
;
3887 struct nfs4_lock_state
*lsp
;
3888 struct nfs_open_context
*ctx
;
3889 struct file_lock fl
;
3890 const struct nfs_server
*server
;
3891 unsigned long timestamp
;
3894 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3895 struct nfs_open_context
*ctx
,
3896 struct nfs4_lock_state
*lsp
,
3897 struct nfs_seqid
*seqid
)
3899 struct nfs4_unlockdata
*p
;
3900 struct inode
*inode
= lsp
->ls_state
->inode
;
3902 p
= kzalloc(sizeof(*p
), GFP_NOFS
);
3905 p
->arg
.fh
= NFS_FH(inode
);
3907 p
->arg
.seqid
= seqid
;
3908 p
->res
.seqid
= seqid
;
3909 p
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3910 p
->arg
.stateid
= &lsp
->ls_stateid
;
3912 atomic_inc(&lsp
->ls_count
);
3913 /* Ensure we don't close file until we're done freeing locks! */
3914 p
->ctx
= get_nfs_open_context(ctx
);
3915 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3916 p
->server
= NFS_SERVER(inode
);
3920 static void nfs4_locku_release_calldata(void *data
)
3922 struct nfs4_unlockdata
*calldata
= data
;
3923 nfs_free_seqid(calldata
->arg
.seqid
);
3924 nfs4_put_lock_state(calldata
->lsp
);
3925 put_nfs_open_context(calldata
->ctx
);
3929 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3931 struct nfs4_unlockdata
*calldata
= data
;
3933 nfs4_sequence_done(calldata
->server
, &calldata
->res
.seq_res
,
3935 if (RPC_ASSASSINATED(task
))
3937 switch (task
->tk_status
) {
3939 memcpy(calldata
->lsp
->ls_stateid
.data
,
3940 calldata
->res
.stateid
.data
,
3941 sizeof(calldata
->lsp
->ls_stateid
.data
));
3942 renew_lease(calldata
->server
, calldata
->timestamp
);
3944 case -NFS4ERR_BAD_STATEID
:
3945 case -NFS4ERR_OLD_STATEID
:
3946 case -NFS4ERR_STALE_STATEID
:
3947 case -NFS4ERR_EXPIRED
:
3950 if (nfs4_async_handle_error(task
, calldata
->server
, NULL
) == -EAGAIN
)
3951 nfs_restart_rpc(task
,
3952 calldata
->server
->nfs_client
);
3956 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3958 struct nfs4_unlockdata
*calldata
= data
;
3960 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3962 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3963 /* Note: exit _without_ running nfs4_locku_done */
3964 task
->tk_action
= NULL
;
3967 calldata
->timestamp
= jiffies
;
3968 if (nfs4_setup_sequence(calldata
->server
->nfs_client
,
3969 &calldata
->arg
.seq_args
,
3970 &calldata
->res
.seq_res
, 1, task
))
3972 rpc_call_start(task
);
3975 static const struct rpc_call_ops nfs4_locku_ops
= {
3976 .rpc_call_prepare
= nfs4_locku_prepare
,
3977 .rpc_call_done
= nfs4_locku_done
,
3978 .rpc_release
= nfs4_locku_release_calldata
,
3981 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3982 struct nfs_open_context
*ctx
,
3983 struct nfs4_lock_state
*lsp
,
3984 struct nfs_seqid
*seqid
)
3986 struct nfs4_unlockdata
*data
;
3987 struct rpc_message msg
= {
3988 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3989 .rpc_cred
= ctx
->cred
,
3991 struct rpc_task_setup task_setup_data
= {
3992 .rpc_client
= NFS_CLIENT(lsp
->ls_state
->inode
),
3993 .rpc_message
= &msg
,
3994 .callback_ops
= &nfs4_locku_ops
,
3995 .workqueue
= nfsiod_workqueue
,
3996 .flags
= RPC_TASK_ASYNC
,
3999 /* Ensure this is an unlock - when canceling a lock, the
4000 * canceled lock is passed in, and it won't be an unlock.
4002 fl
->fl_type
= F_UNLCK
;
4004 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
4006 nfs_free_seqid(seqid
);
4007 return ERR_PTR(-ENOMEM
);
4010 msg
.rpc_argp
= &data
->arg
,
4011 msg
.rpc_resp
= &data
->res
,
4012 task_setup_data
.callback_data
= data
;
4013 return rpc_run_task(&task_setup_data
);
4016 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4018 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
4019 struct nfs_seqid
*seqid
;
4020 struct nfs4_lock_state
*lsp
;
4021 struct rpc_task
*task
;
4023 unsigned char fl_flags
= request
->fl_flags
;
4025 status
= nfs4_set_lock_state(state
, request
);
4026 /* Unlock _before_ we do the RPC call */
4027 request
->fl_flags
|= FL_EXISTS
;
4028 down_read(&nfsi
->rwsem
);
4029 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
) {
4030 up_read(&nfsi
->rwsem
);
4033 up_read(&nfsi
->rwsem
);
4036 /* Is this a delegated lock? */
4037 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
4039 lsp
= request
->fl_u
.nfs4_fl
.owner
;
4040 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
, GFP_KERNEL
);
4044 task
= nfs4_do_unlck(request
, nfs_file_open_context(request
->fl_file
), lsp
, seqid
);
4045 status
= PTR_ERR(task
);
4048 status
= nfs4_wait_for_completion_rpc_task(task
);
4051 request
->fl_flags
= fl_flags
;
4055 struct nfs4_lockdata
{
4056 struct nfs_lock_args arg
;
4057 struct nfs_lock_res res
;
4058 struct nfs4_lock_state
*lsp
;
4059 struct nfs_open_context
*ctx
;
4060 struct file_lock fl
;
4061 unsigned long timestamp
;
4064 struct nfs_server
*server
;
4067 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
4068 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
,
4071 struct nfs4_lockdata
*p
;
4072 struct inode
*inode
= lsp
->ls_state
->inode
;
4073 struct nfs_server
*server
= NFS_SERVER(inode
);
4075 p
= kzalloc(sizeof(*p
), gfp_mask
);
4079 p
->arg
.fh
= NFS_FH(inode
);
4081 p
->arg
.open_seqid
= nfs_alloc_seqid(&lsp
->ls_state
->owner
->so_seqid
, gfp_mask
);
4082 if (p
->arg
.open_seqid
== NULL
)
4084 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
, gfp_mask
);
4085 if (p
->arg
.lock_seqid
== NULL
)
4086 goto out_free_seqid
;
4087 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
4088 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
4089 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
4090 p
->res
.lock_seqid
= p
->arg
.lock_seqid
;
4091 p
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
4094 atomic_inc(&lsp
->ls_count
);
4095 p
->ctx
= get_nfs_open_context(ctx
);
4096 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
4099 nfs_free_seqid(p
->arg
.open_seqid
);
4105 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
4107 struct nfs4_lockdata
*data
= calldata
;
4108 struct nfs4_state
*state
= data
->lsp
->ls_state
;
4110 dprintk("%s: begin!\n", __func__
);
4111 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
4113 /* Do we need to do an open_to_lock_owner? */
4114 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
4115 if (nfs_wait_on_sequence(data
->arg
.open_seqid
, task
) != 0)
4117 data
->arg
.open_stateid
= &state
->stateid
;
4118 data
->arg
.new_lock_owner
= 1;
4119 data
->res
.open_seqid
= data
->arg
.open_seqid
;
4121 data
->arg
.new_lock_owner
= 0;
4122 data
->timestamp
= jiffies
;
4123 if (nfs4_setup_sequence(data
->server
->nfs_client
, &data
->arg
.seq_args
,
4124 &data
->res
.seq_res
, 1, task
))
4126 rpc_call_start(task
);
4127 dprintk("%s: done!, ret = %d\n", __func__
, data
->rpc_status
);
4130 static void nfs4_recover_lock_prepare(struct rpc_task
*task
, void *calldata
)
4132 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
4133 nfs4_lock_prepare(task
, calldata
);
4136 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
4138 struct nfs4_lockdata
*data
= calldata
;
4140 dprintk("%s: begin!\n", __func__
);
4142 nfs4_sequence_done(data
->server
, &data
->res
.seq_res
,
4145 data
->rpc_status
= task
->tk_status
;
4146 if (RPC_ASSASSINATED(task
))
4148 if (data
->arg
.new_lock_owner
!= 0) {
4149 if (data
->rpc_status
== 0)
4150 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
4154 if (data
->rpc_status
== 0) {
4155 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
4156 sizeof(data
->lsp
->ls_stateid
.data
));
4157 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
4158 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
4161 dprintk("%s: done, ret = %d!\n", __func__
, data
->rpc_status
);
4164 static void nfs4_lock_release(void *calldata
)
4166 struct nfs4_lockdata
*data
= calldata
;
4168 dprintk("%s: begin!\n", __func__
);
4169 nfs_free_seqid(data
->arg
.open_seqid
);
4170 if (data
->cancelled
!= 0) {
4171 struct rpc_task
*task
;
4172 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
4173 data
->arg
.lock_seqid
);
4176 dprintk("%s: cancelling lock!\n", __func__
);
4178 nfs_free_seqid(data
->arg
.lock_seqid
);
4179 nfs4_put_lock_state(data
->lsp
);
4180 put_nfs_open_context(data
->ctx
);
4182 dprintk("%s: done!\n", __func__
);
4185 static const struct rpc_call_ops nfs4_lock_ops
= {
4186 .rpc_call_prepare
= nfs4_lock_prepare
,
4187 .rpc_call_done
= nfs4_lock_done
,
4188 .rpc_release
= nfs4_lock_release
,
4191 static const struct rpc_call_ops nfs4_recover_lock_ops
= {
4192 .rpc_call_prepare
= nfs4_recover_lock_prepare
,
4193 .rpc_call_done
= nfs4_lock_done
,
4194 .rpc_release
= nfs4_lock_release
,
4197 static void nfs4_handle_setlk_error(struct nfs_server
*server
, struct nfs4_lock_state
*lsp
, int new_lock_owner
, int error
)
4199 struct nfs_client
*clp
= server
->nfs_client
;
4200 struct nfs4_state
*state
= lsp
->ls_state
;
4203 case -NFS4ERR_ADMIN_REVOKED
:
4204 case -NFS4ERR_BAD_STATEID
:
4205 case -NFS4ERR_EXPIRED
:
4206 if (new_lock_owner
!= 0 ||
4207 (lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) != 0)
4208 nfs4_state_mark_reclaim_nograce(clp
, state
);
4209 lsp
->ls_seqid
.flags
&= ~NFS_SEQID_CONFIRMED
;
4211 case -NFS4ERR_STALE_STATEID
:
4212 if (new_lock_owner
!= 0 ||
4213 (lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) != 0)
4214 nfs4_state_mark_reclaim_reboot(clp
, state
);
4215 lsp
->ls_seqid
.flags
&= ~NFS_SEQID_CONFIRMED
;
4219 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int recovery_type
)
4221 struct nfs4_lockdata
*data
;
4222 struct rpc_task
*task
;
4223 struct rpc_message msg
= {
4224 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
4225 .rpc_cred
= state
->owner
->so_cred
,
4227 struct rpc_task_setup task_setup_data
= {
4228 .rpc_client
= NFS_CLIENT(state
->inode
),
4229 .rpc_message
= &msg
,
4230 .callback_ops
= &nfs4_lock_ops
,
4231 .workqueue
= nfsiod_workqueue
,
4232 .flags
= RPC_TASK_ASYNC
,
4236 dprintk("%s: begin!\n", __func__
);
4237 data
= nfs4_alloc_lockdata(fl
, nfs_file_open_context(fl
->fl_file
),
4238 fl
->fl_u
.nfs4_fl
.owner
,
4239 recovery_type
== NFS_LOCK_NEW
? GFP_KERNEL
: GFP_NOFS
);
4243 data
->arg
.block
= 1;
4244 if (recovery_type
> NFS_LOCK_NEW
) {
4245 if (recovery_type
== NFS_LOCK_RECLAIM
)
4246 data
->arg
.reclaim
= NFS_LOCK_RECLAIM
;
4247 task_setup_data
.callback_ops
= &nfs4_recover_lock_ops
;
4249 msg
.rpc_argp
= &data
->arg
,
4250 msg
.rpc_resp
= &data
->res
,
4251 task_setup_data
.callback_data
= data
;
4252 task
= rpc_run_task(&task_setup_data
);
4254 return PTR_ERR(task
);
4255 ret
= nfs4_wait_for_completion_rpc_task(task
);
4257 ret
= data
->rpc_status
;
4259 nfs4_handle_setlk_error(data
->server
, data
->lsp
,
4260 data
->arg
.new_lock_owner
, ret
);
4262 data
->cancelled
= 1;
4264 dprintk("%s: done, ret = %d!\n", __func__
, ret
);
4268 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
4270 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4271 struct nfs4_exception exception
= { };
4275 /* Cache the lock if possible... */
4276 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
4278 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, NFS_LOCK_RECLAIM
);
4279 if (err
!= -NFS4ERR_DELAY
&& err
!= -EKEYEXPIRED
)
4281 nfs4_handle_exception(server
, err
, &exception
);
4282 } while (exception
.retry
);
4286 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
4288 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4289 struct nfs4_exception exception
= { };
4292 err
= nfs4_set_lock_state(state
, request
);
4296 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
4298 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, NFS_LOCK_EXPIRED
);
4302 case -NFS4ERR_GRACE
:
4303 case -NFS4ERR_DELAY
:
4305 nfs4_handle_exception(server
, err
, &exception
);
4308 } while (exception
.retry
);
4313 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4315 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
4316 unsigned char fl_flags
= request
->fl_flags
;
4317 int status
= -ENOLCK
;
4319 if ((fl_flags
& FL_POSIX
) &&
4320 !test_bit(NFS_STATE_POSIX_LOCKS
, &state
->flags
))
4322 /* Is this a delegated open? */
4323 status
= nfs4_set_lock_state(state
, request
);
4326 request
->fl_flags
|= FL_ACCESS
;
4327 status
= do_vfs_lock(request
->fl_file
, request
);
4330 down_read(&nfsi
->rwsem
);
4331 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
4332 /* Yes: cache locks! */
4333 /* ...but avoid races with delegation recall... */
4334 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
4335 status
= do_vfs_lock(request
->fl_file
, request
);
4338 status
= _nfs4_do_setlk(state
, cmd
, request
, NFS_LOCK_NEW
);
4341 /* Note: we always want to sleep here! */
4342 request
->fl_flags
= fl_flags
| FL_SLEEP
;
4343 if (do_vfs_lock(request
->fl_file
, request
) < 0)
4344 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __func__
);
4346 up_read(&nfsi
->rwsem
);
4348 request
->fl_flags
= fl_flags
;
4352 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4354 struct nfs4_exception exception
= { };
4358 err
= _nfs4_proc_setlk(state
, cmd
, request
);
4359 if (err
== -NFS4ERR_DENIED
)
4361 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
4363 } while (exception
.retry
);
4368 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
4370 struct nfs_open_context
*ctx
;
4371 struct nfs4_state
*state
;
4372 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
4375 /* verify open state */
4376 ctx
= nfs_file_open_context(filp
);
4379 if (request
->fl_start
< 0 || request
->fl_end
< 0)
4382 if (IS_GETLK(cmd
)) {
4384 return nfs4_proc_getlk(state
, F_GETLK
, request
);
4388 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
4391 if (request
->fl_type
== F_UNLCK
) {
4393 return nfs4_proc_unlck(state
, cmd
, request
);
4400 status
= nfs4_proc_setlk(state
, cmd
, request
);
4401 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
4403 timeout
= nfs4_set_lock_task_retry(timeout
);
4404 status
= -ERESTARTSYS
;
4407 } while(status
< 0);
4411 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
4413 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4414 struct nfs4_exception exception
= { };
4417 err
= nfs4_set_lock_state(state
, fl
);
4421 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, NFS_LOCK_NEW
);
4424 printk(KERN_ERR
"%s: unhandled error %d.\n",
4429 case -NFS4ERR_EXPIRED
:
4430 case -NFS4ERR_STALE_CLIENTID
:
4431 case -NFS4ERR_STALE_STATEID
:
4432 case -NFS4ERR_BADSESSION
:
4433 case -NFS4ERR_BADSLOT
:
4434 case -NFS4ERR_BAD_HIGH_SLOT
:
4435 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
4436 case -NFS4ERR_DEADSESSION
:
4437 nfs4_schedule_state_recovery(server
->nfs_client
);
4441 * The show must go on: exit, but mark the
4442 * stateid as needing recovery.
4444 case -NFS4ERR_ADMIN_REVOKED
:
4445 case -NFS4ERR_BAD_STATEID
:
4446 case -NFS4ERR_OPENMODE
:
4447 nfs4_state_mark_reclaim_nograce(server
->nfs_client
, state
);
4451 case -NFS4ERR_DENIED
:
4452 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4455 case -NFS4ERR_DELAY
:
4459 err
= nfs4_handle_exception(server
, err
, &exception
);
4460 } while (exception
.retry
);
4465 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4467 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
4468 size_t buflen
, int flags
)
4470 struct inode
*inode
= dentry
->d_inode
;
4472 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
4475 return nfs4_proc_set_acl(inode
, buf
, buflen
);
4478 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4479 * and that's what we'll do for e.g. user attributes that haven't been set.
4480 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4481 * attributes in kernel-managed attribute namespaces. */
4482 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
4485 struct inode
*inode
= dentry
->d_inode
;
4487 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
4490 return nfs4_proc_get_acl(inode
, buf
, buflen
);
4493 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
4495 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
4497 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
4499 if (buf
&& buflen
< len
)
4502 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
4506 static void nfs_fixup_referral_attributes(struct nfs_fattr
*fattr
)
4508 if (!((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) &&
4509 (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
4510 (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)))
4513 fattr
->valid
|= NFS_ATTR_FATTR_TYPE
| NFS_ATTR_FATTR_MODE
|
4514 NFS_ATTR_FATTR_NLINK
;
4515 fattr
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
4519 int nfs4_proc_fs_locations(struct inode
*dir
, const struct qstr
*name
,
4520 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
4522 struct nfs_server
*server
= NFS_SERVER(dir
);
4524 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
4525 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
4527 struct nfs4_fs_locations_arg args
= {
4528 .dir_fh
= NFS_FH(dir
),
4533 struct nfs4_fs_locations_res res
= {
4534 .fs_locations
= fs_locations
,
4536 struct rpc_message msg
= {
4537 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
4543 dprintk("%s: start\n", __func__
);
4544 nfs_fattr_init(&fs_locations
->fattr
);
4545 fs_locations
->server
= server
;
4546 fs_locations
->nlocations
= 0;
4547 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
4548 nfs_fixup_referral_attributes(&fs_locations
->fattr
);
4549 dprintk("%s: returned status = %d\n", __func__
, status
);
4553 #ifdef CONFIG_NFS_V4_1
4555 * nfs4_proc_exchange_id()
4557 * Since the clientid has expired, all compounds using sessions
4558 * associated with the stale clientid will be returning
4559 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4560 * be in some phase of session reset.
4562 int nfs4_proc_exchange_id(struct nfs_client
*clp
, struct rpc_cred
*cred
)
4564 nfs4_verifier verifier
;
4565 struct nfs41_exchange_id_args args
= {
4567 .flags
= clp
->cl_exchange_flags
,
4569 struct nfs41_exchange_id_res res
= {
4573 struct rpc_message msg
= {
4574 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_EXCHANGE_ID
],
4581 dprintk("--> %s\n", __func__
);
4582 BUG_ON(clp
== NULL
);
4584 /* Remove server-only flags */
4585 args
.flags
&= ~EXCHGID4_FLAG_CONFIRMED_R
;
4587 p
= (u32
*)verifier
.data
;
4588 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
4589 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
4590 args
.verifier
= &verifier
;
4593 args
.id_len
= scnprintf(args
.id
, sizeof(args
.id
),
4596 rpc_peeraddr2str(clp
->cl_rpcclient
,
4598 clp
->cl_id_uniquifier
);
4600 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
4602 if (status
!= -NFS4ERR_CLID_INUSE
)
4608 if (++clp
->cl_id_uniquifier
== 0)
4612 dprintk("<-- %s status= %d\n", __func__
, status
);
4616 struct nfs4_get_lease_time_data
{
4617 struct nfs4_get_lease_time_args
*args
;
4618 struct nfs4_get_lease_time_res
*res
;
4619 struct nfs_client
*clp
;
4622 static void nfs4_get_lease_time_prepare(struct rpc_task
*task
,
4626 struct nfs4_get_lease_time_data
*data
=
4627 (struct nfs4_get_lease_time_data
*)calldata
;
4629 dprintk("--> %s\n", __func__
);
4630 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
4631 /* just setup sequence, do not trigger session recovery
4632 since we're invoked within one */
4633 ret
= nfs41_setup_sequence(data
->clp
->cl_session
,
4634 &data
->args
->la_seq_args
,
4635 &data
->res
->lr_seq_res
, 0, task
);
4637 BUG_ON(ret
== -EAGAIN
);
4638 rpc_call_start(task
);
4639 dprintk("<-- %s\n", __func__
);
4643 * Called from nfs4_state_manager thread for session setup, so don't recover
4644 * from sequence operation or clientid errors.
4646 static void nfs4_get_lease_time_done(struct rpc_task
*task
, void *calldata
)
4648 struct nfs4_get_lease_time_data
*data
=
4649 (struct nfs4_get_lease_time_data
*)calldata
;
4651 dprintk("--> %s\n", __func__
);
4652 nfs41_sequence_done(data
->clp
, &data
->res
->lr_seq_res
, task
->tk_status
);
4653 switch (task
->tk_status
) {
4654 case -NFS4ERR_DELAY
:
4655 case -NFS4ERR_GRACE
:
4657 dprintk("%s Retry: tk_status %d\n", __func__
, task
->tk_status
);
4658 rpc_delay(task
, NFS4_POLL_RETRY_MIN
);
4659 task
->tk_status
= 0;
4660 nfs_restart_rpc(task
, data
->clp
);
4663 dprintk("<-- %s\n", __func__
);
4666 struct rpc_call_ops nfs4_get_lease_time_ops
= {
4667 .rpc_call_prepare
= nfs4_get_lease_time_prepare
,
4668 .rpc_call_done
= nfs4_get_lease_time_done
,
4671 int nfs4_proc_get_lease_time(struct nfs_client
*clp
, struct nfs_fsinfo
*fsinfo
)
4673 struct rpc_task
*task
;
4674 struct nfs4_get_lease_time_args args
;
4675 struct nfs4_get_lease_time_res res
= {
4676 .lr_fsinfo
= fsinfo
,
4678 struct nfs4_get_lease_time_data data
= {
4683 struct rpc_message msg
= {
4684 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GET_LEASE_TIME
],
4688 struct rpc_task_setup task_setup
= {
4689 .rpc_client
= clp
->cl_rpcclient
,
4690 .rpc_message
= &msg
,
4691 .callback_ops
= &nfs4_get_lease_time_ops
,
4692 .callback_data
= &data
4696 res
.lr_seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
4697 dprintk("--> %s\n", __func__
);
4698 task
= rpc_run_task(&task_setup
);
4701 status
= PTR_ERR(task
);
4703 status
= task
->tk_status
;
4706 dprintk("<-- %s return %d\n", __func__
, status
);
4712 * Reset a slot table
4714 static int nfs4_reset_slot_table(struct nfs4_slot_table
*tbl
, u32 max_reqs
,
4717 struct nfs4_slot
*new = NULL
;
4721 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__
,
4722 max_reqs
, tbl
->max_slots
);
4724 /* Does the newly negotiated max_reqs match the existing slot table? */
4725 if (max_reqs
!= tbl
->max_slots
) {
4727 new = kmalloc(max_reqs
* sizeof(struct nfs4_slot
),
4734 spin_lock(&tbl
->slot_tbl_lock
);
4737 tbl
->max_slots
= max_reqs
;
4739 for (i
= 0; i
< tbl
->max_slots
; ++i
)
4740 tbl
->slots
[i
].seq_nr
= ivalue
;
4741 spin_unlock(&tbl
->slot_tbl_lock
);
4742 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__
,
4743 tbl
, tbl
->slots
, tbl
->max_slots
);
4745 dprintk("<-- %s: return %d\n", __func__
, ret
);
4750 * Reset the forechannel and backchannel slot tables
4752 static int nfs4_reset_slot_tables(struct nfs4_session
*session
)
4756 status
= nfs4_reset_slot_table(&session
->fc_slot_table
,
4757 session
->fc_attrs
.max_reqs
, 1);
4761 status
= nfs4_reset_slot_table(&session
->bc_slot_table
,
4762 session
->bc_attrs
.max_reqs
, 0);
4766 /* Destroy the slot table */
4767 static void nfs4_destroy_slot_tables(struct nfs4_session
*session
)
4769 if (session
->fc_slot_table
.slots
!= NULL
) {
4770 kfree(session
->fc_slot_table
.slots
);
4771 session
->fc_slot_table
.slots
= NULL
;
4773 if (session
->bc_slot_table
.slots
!= NULL
) {
4774 kfree(session
->bc_slot_table
.slots
);
4775 session
->bc_slot_table
.slots
= NULL
;
4781 * Initialize slot table
4783 static int nfs4_init_slot_table(struct nfs4_slot_table
*tbl
,
4784 int max_slots
, int ivalue
)
4786 struct nfs4_slot
*slot
;
4789 BUG_ON(max_slots
> NFS4_MAX_SLOT_TABLE
);
4791 dprintk("--> %s: max_reqs=%u\n", __func__
, max_slots
);
4793 slot
= kcalloc(max_slots
, sizeof(struct nfs4_slot
), GFP_NOFS
);
4798 spin_lock(&tbl
->slot_tbl_lock
);
4799 tbl
->max_slots
= max_slots
;
4801 tbl
->highest_used_slotid
= -1; /* no slot is currently used */
4802 spin_unlock(&tbl
->slot_tbl_lock
);
4803 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__
,
4804 tbl
, tbl
->slots
, tbl
->max_slots
);
4806 dprintk("<-- %s: return %d\n", __func__
, ret
);
4811 * Initialize the forechannel and backchannel tables
4813 static int nfs4_init_slot_tables(struct nfs4_session
*session
)
4815 struct nfs4_slot_table
*tbl
;
4818 tbl
= &session
->fc_slot_table
;
4819 if (tbl
->slots
== NULL
) {
4820 status
= nfs4_init_slot_table(tbl
,
4821 session
->fc_attrs
.max_reqs
, 1);
4826 tbl
= &session
->bc_slot_table
;
4827 if (tbl
->slots
== NULL
) {
4828 status
= nfs4_init_slot_table(tbl
,
4829 session
->bc_attrs
.max_reqs
, 0);
4831 nfs4_destroy_slot_tables(session
);
4837 struct nfs4_session
*nfs4_alloc_session(struct nfs_client
*clp
)
4839 struct nfs4_session
*session
;
4840 struct nfs4_slot_table
*tbl
;
4842 session
= kzalloc(sizeof(struct nfs4_session
), GFP_NOFS
);
4847 * The create session reply races with the server back
4848 * channel probe. Mark the client NFS_CS_SESSION_INITING
4849 * so that the client back channel can find the
4852 clp
->cl_cons_state
= NFS_CS_SESSION_INITING
;
4853 init_completion(&session
->complete
);
4855 tbl
= &session
->fc_slot_table
;
4856 tbl
->highest_used_slotid
= -1;
4857 spin_lock_init(&tbl
->slot_tbl_lock
);
4858 rpc_init_priority_wait_queue(&tbl
->slot_tbl_waitq
, "ForeChannel Slot table");
4860 tbl
= &session
->bc_slot_table
;
4861 tbl
->highest_used_slotid
= -1;
4862 spin_lock_init(&tbl
->slot_tbl_lock
);
4863 rpc_init_wait_queue(&tbl
->slot_tbl_waitq
, "BackChannel Slot table");
4869 void nfs4_destroy_session(struct nfs4_session
*session
)
4871 nfs4_proc_destroy_session(session
);
4872 dprintk("%s Destroy backchannel for xprt %p\n",
4873 __func__
, session
->clp
->cl_rpcclient
->cl_xprt
);
4874 xprt_destroy_backchannel(session
->clp
->cl_rpcclient
->cl_xprt
,
4875 NFS41_BC_MIN_CALLBACKS
);
4876 nfs4_destroy_slot_tables(session
);
4881 * Initialize the values to be used by the client in CREATE_SESSION
4882 * If nfs4_init_session set the fore channel request and response sizes,
4885 * Set the back channel max_resp_sz_cached to zero to force the client to
4886 * always set csa_cachethis to FALSE because the current implementation
4887 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4889 static void nfs4_init_channel_attrs(struct nfs41_create_session_args
*args
)
4891 struct nfs4_session
*session
= args
->client
->cl_session
;
4892 unsigned int mxrqst_sz
= session
->fc_attrs
.max_rqst_sz
,
4893 mxresp_sz
= session
->fc_attrs
.max_resp_sz
;
4896 mxrqst_sz
= NFS_MAX_FILE_IO_SIZE
;
4898 mxresp_sz
= NFS_MAX_FILE_IO_SIZE
;
4899 /* Fore channel attributes */
4900 args
->fc_attrs
.headerpadsz
= 0;
4901 args
->fc_attrs
.max_rqst_sz
= mxrqst_sz
;
4902 args
->fc_attrs
.max_resp_sz
= mxresp_sz
;
4903 args
->fc_attrs
.max_ops
= NFS4_MAX_OPS
;
4904 args
->fc_attrs
.max_reqs
= session
->clp
->cl_rpcclient
->cl_xprt
->max_reqs
;
4906 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4907 "max_ops=%u max_reqs=%u\n",
4909 args
->fc_attrs
.max_rqst_sz
, args
->fc_attrs
.max_resp_sz
,
4910 args
->fc_attrs
.max_ops
, args
->fc_attrs
.max_reqs
);
4912 /* Back channel attributes */
4913 args
->bc_attrs
.headerpadsz
= 0;
4914 args
->bc_attrs
.max_rqst_sz
= PAGE_SIZE
;
4915 args
->bc_attrs
.max_resp_sz
= PAGE_SIZE
;
4916 args
->bc_attrs
.max_resp_sz_cached
= 0;
4917 args
->bc_attrs
.max_ops
= NFS4_MAX_BACK_CHANNEL_OPS
;
4918 args
->bc_attrs
.max_reqs
= 1;
4920 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4921 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4923 args
->bc_attrs
.max_rqst_sz
, args
->bc_attrs
.max_resp_sz
,
4924 args
->bc_attrs
.max_resp_sz_cached
, args
->bc_attrs
.max_ops
,
4925 args
->bc_attrs
.max_reqs
);
4928 static int _verify_channel_attr(char *chan
, char *attr_name
, u32 sent
, u32 rcvd
)
4932 printk(KERN_WARNING
"%s: Session INVALID: %s channel %s increased. "
4933 "sent=%u rcvd=%u\n", __func__
, chan
, attr_name
, sent
, rcvd
);
4937 #define _verify_fore_channel_attr(_name_) \
4938 _verify_channel_attr("fore", #_name_, \
4939 args->fc_attrs._name_, \
4940 session->fc_attrs._name_)
4942 #define _verify_back_channel_attr(_name_) \
4943 _verify_channel_attr("back", #_name_, \
4944 args->bc_attrs._name_, \
4945 session->bc_attrs._name_)
4948 * The server is not allowed to increase the fore channel header pad size,
4949 * maximum response size, or maximum number of operations.
4951 * The back channel attributes are only negotiatied down: We send what the
4952 * (back channel) server insists upon.
4954 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args
*args
,
4955 struct nfs4_session
*session
)
4959 ret
|= _verify_fore_channel_attr(headerpadsz
);
4960 ret
|= _verify_fore_channel_attr(max_resp_sz
);
4961 ret
|= _verify_fore_channel_attr(max_ops
);
4963 ret
|= _verify_back_channel_attr(headerpadsz
);
4964 ret
|= _verify_back_channel_attr(max_rqst_sz
);
4965 ret
|= _verify_back_channel_attr(max_resp_sz
);
4966 ret
|= _verify_back_channel_attr(max_resp_sz_cached
);
4967 ret
|= _verify_back_channel_attr(max_ops
);
4968 ret
|= _verify_back_channel_attr(max_reqs
);
4973 static int _nfs4_proc_create_session(struct nfs_client
*clp
)
4975 struct nfs4_session
*session
= clp
->cl_session
;
4976 struct nfs41_create_session_args args
= {
4978 .cb_program
= NFS4_CALLBACK
,
4980 struct nfs41_create_session_res res
= {
4983 struct rpc_message msg
= {
4984 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE_SESSION
],
4990 nfs4_init_channel_attrs(&args
);
4991 args
.flags
= (SESSION4_PERSIST
| SESSION4_BACK_CHAN
);
4993 status
= rpc_call_sync(session
->clp
->cl_rpcclient
, &msg
, 0);
4996 /* Verify the session's negotiated channel_attrs values */
4997 status
= nfs4_verify_channel_attrs(&args
, session
);
4999 /* Increment the clientid slot sequence id */
5007 * Issues a CREATE_SESSION operation to the server.
5008 * It is the responsibility of the caller to verify the session is
5009 * expired before calling this routine.
5011 int nfs4_proc_create_session(struct nfs_client
*clp
)
5015 struct nfs4_session
*session
= clp
->cl_session
;
5017 dprintk("--> %s clp=%p session=%p\n", __func__
, clp
, session
);
5019 status
= _nfs4_proc_create_session(clp
);
5023 /* Init and reset the fore channel */
5024 status
= nfs4_init_slot_tables(session
);
5025 dprintk("slot table initialization returned %d\n", status
);
5028 status
= nfs4_reset_slot_tables(session
);
5029 dprintk("slot table reset returned %d\n", status
);
5033 ptr
= (unsigned *)&session
->sess_id
.data
[0];
5034 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__
,
5035 clp
->cl_seqid
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
5037 dprintk("<-- %s\n", __func__
);
5042 * Issue the over-the-wire RPC DESTROY_SESSION.
5043 * The caller must serialize access to this routine.
5045 int nfs4_proc_destroy_session(struct nfs4_session
*session
)
5048 struct rpc_message msg
;
5050 dprintk("--> nfs4_proc_destroy_session\n");
5052 /* session is still being setup */
5053 if (session
->clp
->cl_cons_state
!= NFS_CS_READY
)
5056 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DESTROY_SESSION
];
5057 msg
.rpc_argp
= session
;
5058 msg
.rpc_resp
= NULL
;
5059 msg
.rpc_cred
= NULL
;
5060 status
= rpc_call_sync(session
->clp
->cl_rpcclient
, &msg
, 0);
5064 "Got error %d from the server on DESTROY_SESSION. "
5065 "Session has been destroyed regardless...\n", status
);
5067 dprintk("<-- nfs4_proc_destroy_session\n");
5071 int nfs4_init_session(struct nfs_server
*server
)
5073 struct nfs_client
*clp
= server
->nfs_client
;
5074 struct nfs4_session
*session
;
5075 unsigned int rsize
, wsize
;
5078 if (!nfs4_has_session(clp
))
5081 rsize
= server
->rsize
;
5083 rsize
= NFS_MAX_FILE_IO_SIZE
;
5084 wsize
= server
->wsize
;
5086 wsize
= NFS_MAX_FILE_IO_SIZE
;
5088 session
= clp
->cl_session
;
5089 session
->fc_attrs
.max_rqst_sz
= wsize
+ nfs41_maxwrite_overhead
;
5090 session
->fc_attrs
.max_resp_sz
= rsize
+ nfs41_maxread_overhead
;
5092 ret
= nfs4_recover_expired_lease(server
);
5094 ret
= nfs4_check_client_ready(clp
);
5099 * Renew the cl_session lease.
5101 static int nfs4_proc_sequence(struct nfs_client
*clp
, struct rpc_cred
*cred
)
5103 struct nfs4_sequence_args args
;
5104 struct nfs4_sequence_res res
;
5106 struct rpc_message msg
= {
5107 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SEQUENCE
],
5113 args
.sa_cache_this
= 0;
5115 return nfs4_call_sync_sequence(clp
, clp
->cl_rpcclient
, &msg
, &args
,
5116 &res
, args
.sa_cache_this
, 1);
5119 static void nfs41_sequence_release(void *data
)
5121 struct nfs_client
*clp
= (struct nfs_client
*)data
;
5123 if (atomic_read(&clp
->cl_count
) > 1)
5124 nfs4_schedule_state_renewal(clp
);
5125 nfs_put_client(clp
);
5128 static void nfs41_sequence_call_done(struct rpc_task
*task
, void *data
)
5130 struct nfs_client
*clp
= (struct nfs_client
*)data
;
5132 nfs41_sequence_done(clp
, task
->tk_msg
.rpc_resp
, task
->tk_status
);
5134 if (task
->tk_status
< 0) {
5135 dprintk("%s ERROR %d\n", __func__
, task
->tk_status
);
5136 if (atomic_read(&clp
->cl_count
) == 1)
5139 if (_nfs4_async_handle_error(task
, NULL
, clp
, NULL
)
5141 nfs_restart_rpc(task
, clp
);
5145 dprintk("%s rpc_cred %p\n", __func__
, task
->tk_msg
.rpc_cred
);
5147 kfree(task
->tk_msg
.rpc_argp
);
5148 kfree(task
->tk_msg
.rpc_resp
);
5150 dprintk("<-- %s\n", __func__
);
5153 static void nfs41_sequence_prepare(struct rpc_task
*task
, void *data
)
5155 struct nfs_client
*clp
;
5156 struct nfs4_sequence_args
*args
;
5157 struct nfs4_sequence_res
*res
;
5159 clp
= (struct nfs_client
*)data
;
5160 args
= task
->tk_msg
.rpc_argp
;
5161 res
= task
->tk_msg
.rpc_resp
;
5163 if (nfs4_setup_sequence(clp
, args
, res
, 0, task
))
5165 rpc_call_start(task
);
5168 static const struct rpc_call_ops nfs41_sequence_ops
= {
5169 .rpc_call_done
= nfs41_sequence_call_done
,
5170 .rpc_call_prepare
= nfs41_sequence_prepare
,
5171 .rpc_release
= nfs41_sequence_release
,
5174 static int nfs41_proc_async_sequence(struct nfs_client
*clp
,
5175 struct rpc_cred
*cred
)
5177 struct nfs4_sequence_args
*args
;
5178 struct nfs4_sequence_res
*res
;
5179 struct rpc_message msg
= {
5180 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SEQUENCE
],
5184 if (!atomic_inc_not_zero(&clp
->cl_count
))
5186 args
= kzalloc(sizeof(*args
), GFP_NOFS
);
5187 res
= kzalloc(sizeof(*res
), GFP_NOFS
);
5188 if (!args
|| !res
) {
5191 nfs_put_client(clp
);
5194 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
5195 msg
.rpc_argp
= args
;
5198 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
5199 &nfs41_sequence_ops
, (void *)clp
);
5202 struct nfs4_reclaim_complete_data
{
5203 struct nfs_client
*clp
;
5204 struct nfs41_reclaim_complete_args arg
;
5205 struct nfs41_reclaim_complete_res res
;
5208 static void nfs4_reclaim_complete_prepare(struct rpc_task
*task
, void *data
)
5210 struct nfs4_reclaim_complete_data
*calldata
= data
;
5212 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
5213 if (nfs4_setup_sequence(calldata
->clp
, &calldata
->arg
.seq_args
,
5214 &calldata
->res
.seq_res
, 0, task
))
5217 rpc_call_start(task
);
5220 static void nfs4_reclaim_complete_done(struct rpc_task
*task
, void *data
)
5222 struct nfs4_reclaim_complete_data
*calldata
= data
;
5223 struct nfs_client
*clp
= calldata
->clp
;
5224 struct nfs4_sequence_res
*res
= &calldata
->res
.seq_res
;
5226 dprintk("--> %s\n", __func__
);
5227 nfs41_sequence_done(clp
, res
, task
->tk_status
);
5228 switch (task
->tk_status
) {
5230 case -NFS4ERR_COMPLETE_ALREADY
:
5232 case -NFS4ERR_BADSESSION
:
5233 case -NFS4ERR_DEADSESSION
:
5235 * Handle the session error, but do not retry the operation, as
5236 * we have no way of telling whether the clientid had to be
5237 * reset before we got our reply. If reset, a new wave of
5238 * reclaim operations will follow, containing their own reclaim
5239 * complete. We don't want our retry to get on the way of
5240 * recovery by incorrectly indicating to the server that we're
5241 * done reclaiming state since the process had to be restarted.
5243 _nfs4_async_handle_error(task
, NULL
, clp
, NULL
);
5246 if (_nfs4_async_handle_error(
5247 task
, NULL
, clp
, NULL
) == -EAGAIN
) {
5248 rpc_restart_call_prepare(task
);
5253 dprintk("<-- %s\n", __func__
);
5256 static void nfs4_free_reclaim_complete_data(void *data
)
5258 struct nfs4_reclaim_complete_data
*calldata
= data
;
5263 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops
= {
5264 .rpc_call_prepare
= nfs4_reclaim_complete_prepare
,
5265 .rpc_call_done
= nfs4_reclaim_complete_done
,
5266 .rpc_release
= nfs4_free_reclaim_complete_data
,
5270 * Issue a global reclaim complete.
5272 static int nfs41_proc_reclaim_complete(struct nfs_client
*clp
)
5274 struct nfs4_reclaim_complete_data
*calldata
;
5275 struct rpc_task
*task
;
5276 struct rpc_message msg
= {
5277 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RECLAIM_COMPLETE
],
5279 struct rpc_task_setup task_setup_data
= {
5280 .rpc_client
= clp
->cl_rpcclient
,
5281 .rpc_message
= &msg
,
5282 .callback_ops
= &nfs4_reclaim_complete_call_ops
,
5283 .flags
= RPC_TASK_ASYNC
,
5285 int status
= -ENOMEM
;
5287 dprintk("--> %s\n", __func__
);
5288 calldata
= kzalloc(sizeof(*calldata
), GFP_NOFS
);
5289 if (calldata
== NULL
)
5291 calldata
->clp
= clp
;
5292 calldata
->arg
.one_fs
= 0;
5293 calldata
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
5295 msg
.rpc_argp
= &calldata
->arg
;
5296 msg
.rpc_resp
= &calldata
->res
;
5297 task_setup_data
.callback_data
= calldata
;
5298 task
= rpc_run_task(&task_setup_data
);
5300 status
= PTR_ERR(task
);
5306 dprintk("<-- %s status=%d\n", __func__
, status
);
5309 #endif /* CONFIG_NFS_V4_1 */
5311 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops
= {
5312 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
5313 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
5314 .recover_open
= nfs4_open_reclaim
,
5315 .recover_lock
= nfs4_lock_reclaim
,
5316 .establish_clid
= nfs4_init_clientid
,
5317 .get_clid_cred
= nfs4_get_setclientid_cred
,
5320 #if defined(CONFIG_NFS_V4_1)
5321 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops
= {
5322 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
5323 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
5324 .recover_open
= nfs4_open_reclaim
,
5325 .recover_lock
= nfs4_lock_reclaim
,
5326 .establish_clid
= nfs41_init_clientid
,
5327 .get_clid_cred
= nfs4_get_exchange_id_cred
,
5328 .reclaim_complete
= nfs41_proc_reclaim_complete
,
5330 #endif /* CONFIG_NFS_V4_1 */
5332 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops
= {
5333 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
5334 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
5335 .recover_open
= nfs4_open_expired
,
5336 .recover_lock
= nfs4_lock_expired
,
5337 .establish_clid
= nfs4_init_clientid
,
5338 .get_clid_cred
= nfs4_get_setclientid_cred
,
5341 #if defined(CONFIG_NFS_V4_1)
5342 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops
= {
5343 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
5344 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
5345 .recover_open
= nfs4_open_expired
,
5346 .recover_lock
= nfs4_lock_expired
,
5347 .establish_clid
= nfs41_init_clientid
,
5348 .get_clid_cred
= nfs4_get_exchange_id_cred
,
5350 #endif /* CONFIG_NFS_V4_1 */
5352 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops
= {
5353 .sched_state_renewal
= nfs4_proc_async_renew
,
5354 .get_state_renewal_cred_locked
= nfs4_get_renew_cred_locked
,
5355 .renew_lease
= nfs4_proc_renew
,
5358 #if defined(CONFIG_NFS_V4_1)
5359 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops
= {
5360 .sched_state_renewal
= nfs41_proc_async_sequence
,
5361 .get_state_renewal_cred_locked
= nfs4_get_machine_cred_locked
,
5362 .renew_lease
= nfs4_proc_sequence
,
5367 * Per minor version reboot and network partition recovery ops
5370 struct nfs4_state_recovery_ops
*nfs4_reboot_recovery_ops
[] = {
5371 &nfs40_reboot_recovery_ops
,
5372 #if defined(CONFIG_NFS_V4_1)
5373 &nfs41_reboot_recovery_ops
,
5377 struct nfs4_state_recovery_ops
*nfs4_nograce_recovery_ops
[] = {
5378 &nfs40_nograce_recovery_ops
,
5379 #if defined(CONFIG_NFS_V4_1)
5380 &nfs41_nograce_recovery_ops
,
5384 struct nfs4_state_maintenance_ops
*nfs4_state_renewal_ops
[] = {
5385 &nfs40_state_renewal_ops
,
5386 #if defined(CONFIG_NFS_V4_1)
5387 &nfs41_state_renewal_ops
,
5391 static const struct inode_operations nfs4_file_inode_operations
= {
5392 .permission
= nfs_permission
,
5393 .getattr
= nfs_getattr
,
5394 .setattr
= nfs_setattr
,
5395 .getxattr
= nfs4_getxattr
,
5396 .setxattr
= nfs4_setxattr
,
5397 .listxattr
= nfs4_listxattr
,
5400 const struct nfs_rpc_ops nfs_v4_clientops
= {
5401 .version
= 4, /* protocol version */
5402 .dentry_ops
= &nfs4_dentry_operations
,
5403 .dir_inode_ops
= &nfs4_dir_inode_operations
,
5404 .file_inode_ops
= &nfs4_file_inode_operations
,
5405 .getroot
= nfs4_proc_get_root
,
5406 .getattr
= nfs4_proc_getattr
,
5407 .setattr
= nfs4_proc_setattr
,
5408 .lookupfh
= nfs4_proc_lookupfh
,
5409 .lookup
= nfs4_proc_lookup
,
5410 .access
= nfs4_proc_access
,
5411 .readlink
= nfs4_proc_readlink
,
5412 .create
= nfs4_proc_create
,
5413 .remove
= nfs4_proc_remove
,
5414 .unlink_setup
= nfs4_proc_unlink_setup
,
5415 .unlink_done
= nfs4_proc_unlink_done
,
5416 .rename
= nfs4_proc_rename
,
5417 .link
= nfs4_proc_link
,
5418 .symlink
= nfs4_proc_symlink
,
5419 .mkdir
= nfs4_proc_mkdir
,
5420 .rmdir
= nfs4_proc_remove
,
5421 .readdir
= nfs4_proc_readdir
,
5422 .mknod
= nfs4_proc_mknod
,
5423 .statfs
= nfs4_proc_statfs
,
5424 .fsinfo
= nfs4_proc_fsinfo
,
5425 .pathconf
= nfs4_proc_pathconf
,
5426 .set_capabilities
= nfs4_server_capabilities
,
5427 .decode_dirent
= nfs4_decode_dirent
,
5428 .read_setup
= nfs4_proc_read_setup
,
5429 .read_done
= nfs4_read_done
,
5430 .write_setup
= nfs4_proc_write_setup
,
5431 .write_done
= nfs4_write_done
,
5432 .commit_setup
= nfs4_proc_commit_setup
,
5433 .commit_done
= nfs4_commit_done
,
5434 .lock
= nfs4_proc_lock
,
5435 .clear_acl_cache
= nfs4_zap_acl_attr
,
5436 .close_context
= nfs4_close_context
,