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/sunrpc/clnt.h>
43 #include <linux/nfs.h>
44 #include <linux/nfs4.h>
45 #include <linux/nfs_fs.h>
46 #include <linux/nfs_page.h>
47 #include <linux/namei.h>
48 #include <linux/mount.h>
49 #include <linux/module.h>
50 #include <linux/sunrpc/bc_xprt.h>
53 #include "delegation.h"
58 #define NFSDBG_FACILITY NFSDBG_PROC
60 #define NFS4_POLL_RETRY_MIN (HZ/10)
61 #define NFS4_POLL_RETRY_MAX (15*HZ)
63 #define NFS4_MAX_LOOP_ON_RECOVER (10)
66 static int _nfs4_proc_open(struct nfs4_opendata
*data
);
67 static int _nfs4_recover_proc_open(struct nfs4_opendata
*data
);
68 static int nfs4_do_fsinfo(struct nfs_server
*, struct nfs_fh
*, struct nfs_fsinfo
*);
69 static int nfs4_async_handle_error(struct rpc_task
*, const struct nfs_server
*, struct nfs4_state
*);
70 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
71 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
73 /* Prevent leaks of NFSv4 errors into userland */
74 static int nfs4_map_errors(int err
)
79 case -NFS4ERR_RESOURCE
:
82 dprintk("%s could not handle NFSv4 error %d\n",
90 * This is our standard bitmap for GETATTR requests.
92 const u32 nfs4_fattr_bitmap
[2] = {
97 | FATTR4_WORD0_FILEID
,
99 | FATTR4_WORD1_NUMLINKS
101 | FATTR4_WORD1_OWNER_GROUP
102 | FATTR4_WORD1_RAWDEV
103 | FATTR4_WORD1_SPACE_USED
104 | FATTR4_WORD1_TIME_ACCESS
105 | FATTR4_WORD1_TIME_METADATA
106 | FATTR4_WORD1_TIME_MODIFY
109 const u32 nfs4_statfs_bitmap
[2] = {
110 FATTR4_WORD0_FILES_AVAIL
111 | FATTR4_WORD0_FILES_FREE
112 | FATTR4_WORD0_FILES_TOTAL
,
113 FATTR4_WORD1_SPACE_AVAIL
114 | FATTR4_WORD1_SPACE_FREE
115 | FATTR4_WORD1_SPACE_TOTAL
118 const u32 nfs4_pathconf_bitmap
[2] = {
120 | FATTR4_WORD0_MAXNAME
,
124 const u32 nfs4_fsinfo_bitmap
[2] = { FATTR4_WORD0_MAXFILESIZE
125 | FATTR4_WORD0_MAXREAD
126 | FATTR4_WORD0_MAXWRITE
127 | FATTR4_WORD0_LEASE_TIME
,
131 const u32 nfs4_fs_locations_bitmap
[2] = {
133 | FATTR4_WORD0_CHANGE
136 | FATTR4_WORD0_FILEID
137 | FATTR4_WORD0_FS_LOCATIONS
,
139 | FATTR4_WORD1_NUMLINKS
141 | FATTR4_WORD1_OWNER_GROUP
142 | FATTR4_WORD1_RAWDEV
143 | FATTR4_WORD1_SPACE_USED
144 | FATTR4_WORD1_TIME_ACCESS
145 | FATTR4_WORD1_TIME_METADATA
146 | FATTR4_WORD1_TIME_MODIFY
147 | FATTR4_WORD1_MOUNTED_ON_FILEID
150 static void nfs4_setup_readdir(u64 cookie
, __be32
*verifier
, struct dentry
*dentry
,
151 struct nfs4_readdir_arg
*readdir
)
155 BUG_ON(readdir
->count
< 80);
157 readdir
->cookie
= cookie
;
158 memcpy(&readdir
->verifier
, verifier
, sizeof(readdir
->verifier
));
163 memset(&readdir
->verifier
, 0, sizeof(readdir
->verifier
));
168 * NFSv4 servers do not return entries for '.' and '..'
169 * Therefore, we fake these entries here. We let '.'
170 * have cookie 0 and '..' have cookie 1. Note that
171 * when talking to the server, we always send cookie 0
174 start
= p
= kmap_atomic(*readdir
->pages
, KM_USER0
);
177 *p
++ = xdr_one
; /* next */
178 *p
++ = xdr_zero
; /* cookie, first word */
179 *p
++ = xdr_one
; /* cookie, second word */
180 *p
++ = xdr_one
; /* entry len */
181 memcpy(p
, ".\0\0\0", 4); /* entry */
183 *p
++ = xdr_one
; /* bitmap length */
184 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
185 *p
++ = htonl(8); /* attribute buffer length */
186 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_inode
));
189 *p
++ = xdr_one
; /* next */
190 *p
++ = xdr_zero
; /* cookie, first word */
191 *p
++ = xdr_two
; /* cookie, second word */
192 *p
++ = xdr_two
; /* entry len */
193 memcpy(p
, "..\0\0", 4); /* entry */
195 *p
++ = xdr_one
; /* bitmap length */
196 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
197 *p
++ = htonl(8); /* attribute buffer length */
198 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_parent
->d_inode
));
200 readdir
->pgbase
= (char *)p
- (char *)start
;
201 readdir
->count
-= readdir
->pgbase
;
202 kunmap_atomic(start
, KM_USER0
);
205 static int nfs4_wait_clnt_recover(struct nfs_client
*clp
)
211 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
,
212 nfs_wait_bit_killable
, TASK_KILLABLE
);
216 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
223 *timeout
= NFS4_POLL_RETRY_MIN
;
224 if (*timeout
> NFS4_POLL_RETRY_MAX
)
225 *timeout
= NFS4_POLL_RETRY_MAX
;
226 schedule_timeout_killable(*timeout
);
227 if (fatal_signal_pending(current
))
233 /* This is the error handling routine for processes that are allowed
236 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
238 struct nfs_client
*clp
= server
->nfs_client
;
239 struct nfs4_state
*state
= exception
->state
;
242 exception
->retry
= 0;
246 case -NFS4ERR_ADMIN_REVOKED
:
247 case -NFS4ERR_BAD_STATEID
:
248 case -NFS4ERR_OPENMODE
:
251 nfs4_state_mark_reclaim_nograce(clp
, state
);
252 case -NFS4ERR_STALE_CLIENTID
:
253 case -NFS4ERR_STALE_STATEID
:
254 case -NFS4ERR_EXPIRED
:
255 nfs4_schedule_state_recovery(clp
);
256 ret
= nfs4_wait_clnt_recover(clp
);
258 exception
->retry
= 1;
259 #if !defined(CONFIG_NFS_V4_1)
261 #else /* !defined(CONFIG_NFS_V4_1) */
262 if (!nfs4_has_session(server
->nfs_client
))
265 case -NFS4ERR_BADSESSION
:
266 case -NFS4ERR_BADSLOT
:
267 case -NFS4ERR_BAD_HIGH_SLOT
:
268 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
269 case -NFS4ERR_DEADSESSION
:
270 case -NFS4ERR_SEQ_FALSE_RETRY
:
271 case -NFS4ERR_SEQ_MISORDERED
:
272 dprintk("%s ERROR: %d Reset session\n", __func__
,
274 nfs4_schedule_state_recovery(clp
);
275 exception
->retry
= 1;
277 #endif /* !defined(CONFIG_NFS_V4_1) */
278 case -NFS4ERR_FILE_OPEN
:
279 if (exception
->timeout
> HZ
) {
280 /* We have retried a decent amount, time to
288 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
291 case -NFS4ERR_OLD_STATEID
:
292 exception
->retry
= 1;
294 /* We failed to handle the error */
295 return nfs4_map_errors(ret
);
299 static void renew_lease(const struct nfs_server
*server
, unsigned long timestamp
)
301 struct nfs_client
*clp
= server
->nfs_client
;
302 spin_lock(&clp
->cl_lock
);
303 if (time_before(clp
->cl_last_renewal
,timestamp
))
304 clp
->cl_last_renewal
= timestamp
;
305 spin_unlock(&clp
->cl_lock
);
308 #if defined(CONFIG_NFS_V4_1)
311 * nfs4_free_slot - free a slot and efficiently update slot table.
313 * freeing a slot is trivially done by clearing its respective bit
315 * If the freed slotid equals highest_used_slotid we want to update it
316 * so that the server would be able to size down the slot table if needed,
317 * otherwise we know that the highest_used_slotid is still in use.
318 * When updating highest_used_slotid there may be "holes" in the bitmap
319 * so we need to scan down from highest_used_slotid to 0 looking for the now
320 * highest slotid in use.
321 * If none found, highest_used_slotid is set to -1.
323 * Must be called while holding tbl->slot_tbl_lock
326 nfs4_free_slot(struct nfs4_slot_table
*tbl
, u8 free_slotid
)
328 int slotid
= free_slotid
;
330 /* clear used bit in bitmap */
331 __clear_bit(slotid
, tbl
->used_slots
);
333 /* update highest_used_slotid when it is freed */
334 if (slotid
== tbl
->highest_used_slotid
) {
335 slotid
= find_last_bit(tbl
->used_slots
, tbl
->max_slots
);
336 if (slotid
< tbl
->max_slots
)
337 tbl
->highest_used_slotid
= slotid
;
339 tbl
->highest_used_slotid
= -1;
341 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__
,
342 free_slotid
, tbl
->highest_used_slotid
);
346 * Signal state manager thread if session is drained
348 static void nfs41_check_drain_session_complete(struct nfs4_session
*ses
)
350 struct rpc_task
*task
;
352 if (!test_bit(NFS4CLNT_SESSION_DRAINING
, &ses
->clp
->cl_state
)) {
353 task
= rpc_wake_up_next(&ses
->fc_slot_table
.slot_tbl_waitq
);
355 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
359 if (ses
->fc_slot_table
.highest_used_slotid
!= -1)
362 dprintk("%s COMPLETE: Session Drained\n", __func__
);
363 complete(&ses
->complete
);
366 static void nfs41_sequence_free_slot(const struct nfs_client
*clp
,
367 struct nfs4_sequence_res
*res
)
369 struct nfs4_slot_table
*tbl
;
371 tbl
= &clp
->cl_session
->fc_slot_table
;
372 if (res
->sr_slotid
== NFS4_MAX_SLOT_TABLE
) {
373 /* just wake up the next guy waiting since
374 * we may have not consumed a slot after all */
375 dprintk("%s: No slot\n", __func__
);
379 spin_lock(&tbl
->slot_tbl_lock
);
380 nfs4_free_slot(tbl
, res
->sr_slotid
);
381 nfs41_check_drain_session_complete(clp
->cl_session
);
382 spin_unlock(&tbl
->slot_tbl_lock
);
383 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
386 static void nfs41_sequence_done(struct nfs_client
*clp
,
387 struct nfs4_sequence_res
*res
,
390 unsigned long timestamp
;
391 struct nfs4_slot_table
*tbl
;
392 struct nfs4_slot
*slot
;
395 * sr_status remains 1 if an RPC level error occurred. The server
396 * may or may not have processed the sequence operation..
397 * Proceed as if the server received and processed the sequence
400 if (res
->sr_status
== 1)
401 res
->sr_status
= NFS_OK
;
403 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
404 if (res
->sr_slotid
== NFS4_MAX_SLOT_TABLE
)
407 /* Check the SEQUENCE operation status */
408 if (res
->sr_status
== 0) {
409 tbl
= &clp
->cl_session
->fc_slot_table
;
410 slot
= tbl
->slots
+ res
->sr_slotid
;
411 /* Update the slot's sequence and clientid lease timer */
413 timestamp
= res
->sr_renewal_time
;
414 spin_lock(&clp
->cl_lock
);
415 if (time_before(clp
->cl_last_renewal
, timestamp
))
416 clp
->cl_last_renewal
= timestamp
;
417 spin_unlock(&clp
->cl_lock
);
418 /* Check sequence flags */
419 nfs41_handle_sequence_flag_errors(clp
, res
->sr_status_flags
);
422 /* The session may be reset by one of the error handlers. */
423 dprintk("%s: Error %d free the slot \n", __func__
, res
->sr_status
);
424 nfs41_sequence_free_slot(clp
, res
);
428 * nfs4_find_slot - efficiently look for a free slot
430 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
431 * If found, we mark the slot as used, update the highest_used_slotid,
432 * and respectively set up the sequence operation args.
433 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
435 * Note: must be called with under the slot_tbl_lock.
438 nfs4_find_slot(struct nfs4_slot_table
*tbl
)
441 u8 ret_id
= NFS4_MAX_SLOT_TABLE
;
442 BUILD_BUG_ON((u8
)NFS4_MAX_SLOT_TABLE
!= (int)NFS4_MAX_SLOT_TABLE
);
444 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
445 __func__
, tbl
->used_slots
[0], tbl
->highest_used_slotid
,
447 slotid
= find_first_zero_bit(tbl
->used_slots
, tbl
->max_slots
);
448 if (slotid
>= tbl
->max_slots
)
450 __set_bit(slotid
, tbl
->used_slots
);
451 if (slotid
> tbl
->highest_used_slotid
)
452 tbl
->highest_used_slotid
= slotid
;
455 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
456 __func__
, tbl
->used_slots
[0], tbl
->highest_used_slotid
, ret_id
);
460 static int nfs41_setup_sequence(struct nfs4_session
*session
,
461 struct nfs4_sequence_args
*args
,
462 struct nfs4_sequence_res
*res
,
464 struct rpc_task
*task
)
466 struct nfs4_slot
*slot
;
467 struct nfs4_slot_table
*tbl
;
470 dprintk("--> %s\n", __func__
);
471 /* slot already allocated? */
472 if (res
->sr_slotid
!= NFS4_MAX_SLOT_TABLE
)
475 memset(res
, 0, sizeof(*res
));
476 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
477 tbl
= &session
->fc_slot_table
;
479 spin_lock(&tbl
->slot_tbl_lock
);
480 if (test_bit(NFS4CLNT_SESSION_DRAINING
, &session
->clp
->cl_state
) &&
481 !rpc_task_has_priority(task
, RPC_PRIORITY_PRIVILEGED
)) {
483 * The state manager will wait until the slot table is empty.
484 * Schedule the reset thread
486 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
487 spin_unlock(&tbl
->slot_tbl_lock
);
488 dprintk("%s Schedule Session Reset\n", __func__
);
492 if (!rpc_queue_empty(&tbl
->slot_tbl_waitq
) &&
493 !rpc_task_has_priority(task
, RPC_PRIORITY_PRIVILEGED
)) {
494 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
495 spin_unlock(&tbl
->slot_tbl_lock
);
496 dprintk("%s enforce FIFO order\n", __func__
);
500 slotid
= nfs4_find_slot(tbl
);
501 if (slotid
== NFS4_MAX_SLOT_TABLE
) {
502 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
503 spin_unlock(&tbl
->slot_tbl_lock
);
504 dprintk("<-- %s: no free slots\n", __func__
);
507 spin_unlock(&tbl
->slot_tbl_lock
);
509 rpc_task_set_priority(task
, RPC_PRIORITY_NORMAL
);
510 slot
= tbl
->slots
+ slotid
;
511 args
->sa_session
= session
;
512 args
->sa_slotid
= slotid
;
513 args
->sa_cache_this
= cache_reply
;
515 dprintk("<-- %s slotid=%d seqid=%d\n", __func__
, slotid
, slot
->seq_nr
);
517 res
->sr_session
= session
;
518 res
->sr_slotid
= slotid
;
519 res
->sr_renewal_time
= jiffies
;
521 * sr_status is only set in decode_sequence, and so will remain
522 * set to 1 if an rpc level failure occurs.
528 int nfs4_setup_sequence(struct nfs_client
*clp
,
529 struct nfs4_sequence_args
*args
,
530 struct nfs4_sequence_res
*res
,
532 struct rpc_task
*task
)
536 dprintk("--> %s clp %p session %p sr_slotid %d\n",
537 __func__
, clp
, clp
->cl_session
, res
->sr_slotid
);
539 if (!nfs4_has_session(clp
))
541 ret
= nfs41_setup_sequence(clp
->cl_session
, args
, res
, cache_reply
,
543 if (ret
&& ret
!= -EAGAIN
) {
544 /* terminate rpc task */
545 task
->tk_status
= ret
;
546 task
->tk_action
= NULL
;
549 dprintk("<-- %s status=%d\n", __func__
, ret
);
553 struct nfs41_call_sync_data
{
554 struct nfs_client
*clp
;
555 struct nfs4_sequence_args
*seq_args
;
556 struct nfs4_sequence_res
*seq_res
;
560 static void nfs41_call_sync_prepare(struct rpc_task
*task
, void *calldata
)
562 struct nfs41_call_sync_data
*data
= calldata
;
564 dprintk("--> %s data->clp->cl_session %p\n", __func__
,
565 data
->clp
->cl_session
);
566 if (nfs4_setup_sequence(data
->clp
, data
->seq_args
,
567 data
->seq_res
, data
->cache_reply
, task
))
569 rpc_call_start(task
);
572 static void nfs41_call_priv_sync_prepare(struct rpc_task
*task
, void *calldata
)
574 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
575 nfs41_call_sync_prepare(task
, calldata
);
578 static void nfs41_call_sync_done(struct rpc_task
*task
, void *calldata
)
580 struct nfs41_call_sync_data
*data
= calldata
;
582 nfs41_sequence_done(data
->clp
, data
->seq_res
, task
->tk_status
);
585 struct rpc_call_ops nfs41_call_sync_ops
= {
586 .rpc_call_prepare
= nfs41_call_sync_prepare
,
587 .rpc_call_done
= nfs41_call_sync_done
,
590 struct rpc_call_ops nfs41_call_priv_sync_ops
= {
591 .rpc_call_prepare
= nfs41_call_priv_sync_prepare
,
592 .rpc_call_done
= nfs41_call_sync_done
,
595 static int nfs4_call_sync_sequence(struct nfs_client
*clp
,
596 struct rpc_clnt
*clnt
,
597 struct rpc_message
*msg
,
598 struct nfs4_sequence_args
*args
,
599 struct nfs4_sequence_res
*res
,
604 struct rpc_task
*task
;
605 struct nfs41_call_sync_data data
= {
609 .cache_reply
= cache_reply
,
611 struct rpc_task_setup task_setup
= {
614 .callback_ops
= &nfs41_call_sync_ops
,
615 .callback_data
= &data
618 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
620 task_setup
.callback_ops
= &nfs41_call_priv_sync_ops
;
621 task
= rpc_run_task(&task_setup
);
625 ret
= task
->tk_status
;
631 int _nfs4_call_sync_session(struct nfs_server
*server
,
632 struct rpc_message
*msg
,
633 struct nfs4_sequence_args
*args
,
634 struct nfs4_sequence_res
*res
,
637 return nfs4_call_sync_sequence(server
->nfs_client
, server
->client
,
638 msg
, args
, res
, cache_reply
, 0);
641 #endif /* CONFIG_NFS_V4_1 */
643 int _nfs4_call_sync(struct nfs_server
*server
,
644 struct rpc_message
*msg
,
645 struct nfs4_sequence_args
*args
,
646 struct nfs4_sequence_res
*res
,
649 args
->sa_session
= res
->sr_session
= NULL
;
650 return rpc_call_sync(server
->client
, msg
, 0);
653 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
654 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
655 &(res)->seq_res, (cache_reply))
657 static void nfs4_sequence_done(const struct nfs_server
*server
,
658 struct nfs4_sequence_res
*res
, int rpc_status
)
660 #ifdef CONFIG_NFS_V4_1
661 if (nfs4_has_session(server
->nfs_client
))
662 nfs41_sequence_done(server
->nfs_client
, res
, rpc_status
);
663 #endif /* CONFIG_NFS_V4_1 */
666 static void update_changeattr(struct inode
*dir
, struct nfs4_change_info
*cinfo
)
668 struct nfs_inode
*nfsi
= NFS_I(dir
);
670 spin_lock(&dir
->i_lock
);
671 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
|NFS_INO_INVALID_DATA
;
672 if (!cinfo
->atomic
|| cinfo
->before
!= nfsi
->change_attr
)
673 nfs_force_lookup_revalidate(dir
);
674 nfsi
->change_attr
= cinfo
->after
;
675 spin_unlock(&dir
->i_lock
);
678 struct nfs4_opendata
{
680 struct nfs_openargs o_arg
;
681 struct nfs_openres o_res
;
682 struct nfs_open_confirmargs c_arg
;
683 struct nfs_open_confirmres c_res
;
684 struct nfs_fattr f_attr
;
685 struct nfs_fattr dir_attr
;
688 struct nfs4_state_owner
*owner
;
689 struct nfs4_state
*state
;
691 unsigned long timestamp
;
692 unsigned int rpc_done
: 1;
698 static void nfs4_init_opendata_res(struct nfs4_opendata
*p
)
700 p
->o_res
.f_attr
= &p
->f_attr
;
701 p
->o_res
.dir_attr
= &p
->dir_attr
;
702 p
->o_res
.seqid
= p
->o_arg
.seqid
;
703 p
->c_res
.seqid
= p
->c_arg
.seqid
;
704 p
->o_res
.server
= p
->o_arg
.server
;
705 nfs_fattr_init(&p
->f_attr
);
706 nfs_fattr_init(&p
->dir_attr
);
707 p
->o_res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
710 static struct nfs4_opendata
*nfs4_opendata_alloc(struct path
*path
,
711 struct nfs4_state_owner
*sp
, fmode_t fmode
, int flags
,
712 const struct iattr
*attrs
)
714 struct dentry
*parent
= dget_parent(path
->dentry
);
715 struct inode
*dir
= parent
->d_inode
;
716 struct nfs_server
*server
= NFS_SERVER(dir
);
717 struct nfs4_opendata
*p
;
719 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
722 p
->o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
723 if (p
->o_arg
.seqid
== NULL
)
725 p
->path
.mnt
= mntget(path
->mnt
);
726 p
->path
.dentry
= dget(path
->dentry
);
729 atomic_inc(&sp
->so_count
);
730 p
->o_arg
.fh
= NFS_FH(dir
);
731 p
->o_arg
.open_flags
= flags
;
732 p
->o_arg
.fmode
= fmode
& (FMODE_READ
|FMODE_WRITE
);
733 p
->o_arg
.clientid
= server
->nfs_client
->cl_clientid
;
734 p
->o_arg
.id
= sp
->so_owner_id
.id
;
735 p
->o_arg
.name
= &p
->path
.dentry
->d_name
;
736 p
->o_arg
.server
= server
;
737 p
->o_arg
.bitmask
= server
->attr_bitmask
;
738 p
->o_arg
.claim
= NFS4_OPEN_CLAIM_NULL
;
739 if (flags
& O_EXCL
) {
740 if (nfs4_has_persistent_session(server
->nfs_client
)) {
742 p
->o_arg
.u
.attrs
= &p
->attrs
;
743 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
744 } else { /* EXCLUSIVE4_1 */
745 u32
*s
= (u32
*) p
->o_arg
.u
.verifier
.data
;
749 } else if (flags
& O_CREAT
) {
750 p
->o_arg
.u
.attrs
= &p
->attrs
;
751 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
753 p
->c_arg
.fh
= &p
->o_res
.fh
;
754 p
->c_arg
.stateid
= &p
->o_res
.stateid
;
755 p
->c_arg
.seqid
= p
->o_arg
.seqid
;
756 nfs4_init_opendata_res(p
);
766 static void nfs4_opendata_free(struct kref
*kref
)
768 struct nfs4_opendata
*p
= container_of(kref
,
769 struct nfs4_opendata
, kref
);
771 nfs_free_seqid(p
->o_arg
.seqid
);
772 if (p
->state
!= NULL
)
773 nfs4_put_open_state(p
->state
);
774 nfs4_put_state_owner(p
->owner
);
780 static void nfs4_opendata_put(struct nfs4_opendata
*p
)
783 kref_put(&p
->kref
, nfs4_opendata_free
);
786 static int nfs4_wait_for_completion_rpc_task(struct rpc_task
*task
)
790 ret
= rpc_wait_for_completion_task(task
);
794 static int can_open_cached(struct nfs4_state
*state
, fmode_t mode
, int open_mode
)
798 if (open_mode
& O_EXCL
)
800 switch (mode
& (FMODE_READ
|FMODE_WRITE
)) {
802 ret
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0
803 && state
->n_rdonly
!= 0;
806 ret
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0
807 && state
->n_wronly
!= 0;
809 case FMODE_READ
|FMODE_WRITE
:
810 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0
811 && state
->n_rdwr
!= 0;
817 static int can_open_delegated(struct nfs_delegation
*delegation
, fmode_t fmode
)
819 if ((delegation
->type
& fmode
) != fmode
)
821 if (test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
))
823 nfs_mark_delegation_referenced(delegation
);
827 static void update_open_stateflags(struct nfs4_state
*state
, fmode_t fmode
)
836 case FMODE_READ
|FMODE_WRITE
:
839 nfs4_state_set_mode_locked(state
, state
->state
| fmode
);
842 static void nfs_set_open_stateid_locked(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
844 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
845 memcpy(state
->stateid
.data
, stateid
->data
, sizeof(state
->stateid
.data
));
846 memcpy(state
->open_stateid
.data
, stateid
->data
, sizeof(state
->open_stateid
.data
));
849 set_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
852 set_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
854 case FMODE_READ
|FMODE_WRITE
:
855 set_bit(NFS_O_RDWR_STATE
, &state
->flags
);
859 static void nfs_set_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
861 write_seqlock(&state
->seqlock
);
862 nfs_set_open_stateid_locked(state
, stateid
, fmode
);
863 write_sequnlock(&state
->seqlock
);
866 static void __update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, const nfs4_stateid
*deleg_stateid
, fmode_t fmode
)
869 * Protect the call to nfs4_state_set_mode_locked and
870 * serialise the stateid update
872 write_seqlock(&state
->seqlock
);
873 if (deleg_stateid
!= NULL
) {
874 memcpy(state
->stateid
.data
, deleg_stateid
->data
, sizeof(state
->stateid
.data
));
875 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
877 if (open_stateid
!= NULL
)
878 nfs_set_open_stateid_locked(state
, open_stateid
, fmode
);
879 write_sequnlock(&state
->seqlock
);
880 spin_lock(&state
->owner
->so_lock
);
881 update_open_stateflags(state
, fmode
);
882 spin_unlock(&state
->owner
->so_lock
);
885 static int update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, nfs4_stateid
*delegation
, fmode_t fmode
)
887 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
888 struct nfs_delegation
*deleg_cur
;
891 fmode
&= (FMODE_READ
|FMODE_WRITE
);
894 deleg_cur
= rcu_dereference(nfsi
->delegation
);
895 if (deleg_cur
== NULL
)
898 spin_lock(&deleg_cur
->lock
);
899 if (nfsi
->delegation
!= deleg_cur
||
900 (deleg_cur
->type
& fmode
) != fmode
)
901 goto no_delegation_unlock
;
903 if (delegation
== NULL
)
904 delegation
= &deleg_cur
->stateid
;
905 else if (memcmp(deleg_cur
->stateid
.data
, delegation
->data
, NFS4_STATEID_SIZE
) != 0)
906 goto no_delegation_unlock
;
908 nfs_mark_delegation_referenced(deleg_cur
);
909 __update_open_stateid(state
, open_stateid
, &deleg_cur
->stateid
, fmode
);
911 no_delegation_unlock
:
912 spin_unlock(&deleg_cur
->lock
);
916 if (!ret
&& open_stateid
!= NULL
) {
917 __update_open_stateid(state
, open_stateid
, NULL
, fmode
);
925 static void nfs4_return_incompatible_delegation(struct inode
*inode
, fmode_t fmode
)
927 struct nfs_delegation
*delegation
;
930 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
931 if (delegation
== NULL
|| (delegation
->type
& fmode
) == fmode
) {
936 nfs_inode_return_delegation(inode
);
939 static struct nfs4_state
*nfs4_try_open_cached(struct nfs4_opendata
*opendata
)
941 struct nfs4_state
*state
= opendata
->state
;
942 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
943 struct nfs_delegation
*delegation
;
944 int open_mode
= opendata
->o_arg
.open_flags
& O_EXCL
;
945 fmode_t fmode
= opendata
->o_arg
.fmode
;
946 nfs4_stateid stateid
;
950 if (can_open_cached(state
, fmode
, open_mode
)) {
951 spin_lock(&state
->owner
->so_lock
);
952 if (can_open_cached(state
, fmode
, open_mode
)) {
953 update_open_stateflags(state
, fmode
);
954 spin_unlock(&state
->owner
->so_lock
);
955 goto out_return_state
;
957 spin_unlock(&state
->owner
->so_lock
);
960 delegation
= rcu_dereference(nfsi
->delegation
);
961 if (delegation
== NULL
||
962 !can_open_delegated(delegation
, fmode
)) {
966 /* Save the delegation */
967 memcpy(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
));
969 ret
= nfs_may_open(state
->inode
, state
->owner
->so_cred
, open_mode
);
974 /* Try to update the stateid using the delegation */
975 if (update_open_stateid(state
, NULL
, &stateid
, fmode
))
976 goto out_return_state
;
981 atomic_inc(&state
->count
);
985 static struct nfs4_state
*nfs4_opendata_to_nfs4_state(struct nfs4_opendata
*data
)
988 struct nfs4_state
*state
= NULL
;
989 struct nfs_delegation
*delegation
;
992 if (!data
->rpc_done
) {
993 state
= nfs4_try_open_cached(data
);
998 if (!(data
->f_attr
.valid
& NFS_ATTR_FATTR
))
1000 inode
= nfs_fhget(data
->dir
->d_sb
, &data
->o_res
.fh
, &data
->f_attr
);
1001 ret
= PTR_ERR(inode
);
1005 state
= nfs4_get_open_state(inode
, data
->owner
);
1008 if (data
->o_res
.delegation_type
!= 0) {
1009 int delegation_flags
= 0;
1012 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
1014 delegation_flags
= delegation
->flags
;
1016 if ((delegation_flags
& 1UL<<NFS_DELEGATION_NEED_RECLAIM
) == 0)
1017 nfs_inode_set_delegation(state
->inode
,
1018 data
->owner
->so_cred
,
1021 nfs_inode_reclaim_delegation(state
->inode
,
1022 data
->owner
->so_cred
,
1026 update_open_stateid(state
, &data
->o_res
.stateid
, NULL
,
1034 return ERR_PTR(ret
);
1037 static struct nfs_open_context
*nfs4_state_find_open_context(struct nfs4_state
*state
)
1039 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
1040 struct nfs_open_context
*ctx
;
1042 spin_lock(&state
->inode
->i_lock
);
1043 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
1044 if (ctx
->state
!= state
)
1046 get_nfs_open_context(ctx
);
1047 spin_unlock(&state
->inode
->i_lock
);
1050 spin_unlock(&state
->inode
->i_lock
);
1051 return ERR_PTR(-ENOENT
);
1054 static struct nfs4_opendata
*nfs4_open_recoverdata_alloc(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1056 struct nfs4_opendata
*opendata
;
1058 opendata
= nfs4_opendata_alloc(&ctx
->path
, state
->owner
, 0, 0, NULL
);
1059 if (opendata
== NULL
)
1060 return ERR_PTR(-ENOMEM
);
1061 opendata
->state
= state
;
1062 atomic_inc(&state
->count
);
1066 static int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, fmode_t fmode
, struct nfs4_state
**res
)
1068 struct nfs4_state
*newstate
;
1071 opendata
->o_arg
.open_flags
= 0;
1072 opendata
->o_arg
.fmode
= fmode
;
1073 memset(&opendata
->o_res
, 0, sizeof(opendata
->o_res
));
1074 memset(&opendata
->c_res
, 0, sizeof(opendata
->c_res
));
1075 nfs4_init_opendata_res(opendata
);
1076 ret
= _nfs4_recover_proc_open(opendata
);
1079 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
1080 if (IS_ERR(newstate
))
1081 return PTR_ERR(newstate
);
1082 nfs4_close_state(&opendata
->path
, newstate
, fmode
);
1087 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
1089 struct nfs4_state
*newstate
;
1092 /* memory barrier prior to reading state->n_* */
1093 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
1095 if (state
->n_rdwr
!= 0) {
1096 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &newstate
);
1099 if (newstate
!= state
)
1102 if (state
->n_wronly
!= 0) {
1103 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &newstate
);
1106 if (newstate
!= state
)
1109 if (state
->n_rdonly
!= 0) {
1110 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &newstate
);
1113 if (newstate
!= state
)
1117 * We may have performed cached opens for all three recoveries.
1118 * Check if we need to update the current stateid.
1120 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0 &&
1121 memcmp(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
)) != 0) {
1122 write_seqlock(&state
->seqlock
);
1123 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
1124 memcpy(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
));
1125 write_sequnlock(&state
->seqlock
);
1132 * reclaim state on the server after a reboot.
1134 static int _nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1136 struct nfs_delegation
*delegation
;
1137 struct nfs4_opendata
*opendata
;
1138 fmode_t delegation_type
= 0;
1141 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1142 if (IS_ERR(opendata
))
1143 return PTR_ERR(opendata
);
1144 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
1145 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
1147 delegation
= rcu_dereference(NFS_I(state
->inode
)->delegation
);
1148 if (delegation
!= NULL
&& test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) != 0)
1149 delegation_type
= delegation
->type
;
1151 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
1152 status
= nfs4_open_recover(opendata
, state
);
1153 nfs4_opendata_put(opendata
);
1157 static int nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1159 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1160 struct nfs4_exception exception
= { };
1163 err
= _nfs4_do_open_reclaim(ctx
, state
);
1164 if (err
!= -NFS4ERR_DELAY
)
1166 nfs4_handle_exception(server
, err
, &exception
);
1167 } while (exception
.retry
);
1171 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1173 struct nfs_open_context
*ctx
;
1176 ctx
= nfs4_state_find_open_context(state
);
1178 return PTR_ERR(ctx
);
1179 ret
= nfs4_do_open_reclaim(ctx
, state
);
1180 put_nfs_open_context(ctx
);
1184 static int _nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
1186 struct nfs4_opendata
*opendata
;
1189 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1190 if (IS_ERR(opendata
))
1191 return PTR_ERR(opendata
);
1192 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
1193 memcpy(opendata
->o_arg
.u
.delegation
.data
, stateid
->data
,
1194 sizeof(opendata
->o_arg
.u
.delegation
.data
));
1195 ret
= nfs4_open_recover(opendata
, state
);
1196 nfs4_opendata_put(opendata
);
1200 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
1202 struct nfs4_exception exception
= { };
1203 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1206 err
= _nfs4_open_delegation_recall(ctx
, state
, stateid
);
1212 case -NFS4ERR_BADSESSION
:
1213 case -NFS4ERR_BADSLOT
:
1214 case -NFS4ERR_BAD_HIGH_SLOT
:
1215 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1216 case -NFS4ERR_DEADSESSION
:
1217 nfs4_schedule_state_recovery(
1218 server
->nfs_client
);
1220 case -NFS4ERR_STALE_CLIENTID
:
1221 case -NFS4ERR_STALE_STATEID
:
1222 case -NFS4ERR_EXPIRED
:
1223 /* Don't recall a delegation if it was lost */
1224 nfs4_schedule_state_recovery(server
->nfs_client
);
1228 * The show must go on: exit, but mark the
1229 * stateid as needing recovery.
1231 case -NFS4ERR_ADMIN_REVOKED
:
1232 case -NFS4ERR_BAD_STATEID
:
1233 nfs4_state_mark_reclaim_nograce(server
->nfs_client
, state
);
1238 err
= nfs4_handle_exception(server
, err
, &exception
);
1239 } while (exception
.retry
);
1244 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
1246 struct nfs4_opendata
*data
= calldata
;
1248 data
->rpc_status
= task
->tk_status
;
1249 if (RPC_ASSASSINATED(task
))
1251 if (data
->rpc_status
== 0) {
1252 memcpy(data
->o_res
.stateid
.data
, data
->c_res
.stateid
.data
,
1253 sizeof(data
->o_res
.stateid
.data
));
1254 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
1255 renew_lease(data
->o_res
.server
, data
->timestamp
);
1260 static void nfs4_open_confirm_release(void *calldata
)
1262 struct nfs4_opendata
*data
= calldata
;
1263 struct nfs4_state
*state
= NULL
;
1265 /* If this request hasn't been cancelled, do nothing */
1266 if (data
->cancelled
== 0)
1268 /* In case of error, no cleanup! */
1269 if (!data
->rpc_done
)
1271 state
= nfs4_opendata_to_nfs4_state(data
);
1273 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
1275 nfs4_opendata_put(data
);
1278 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
1279 .rpc_call_done
= nfs4_open_confirm_done
,
1280 .rpc_release
= nfs4_open_confirm_release
,
1284 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1286 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
1288 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
1289 struct rpc_task
*task
;
1290 struct rpc_message msg
= {
1291 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
1292 .rpc_argp
= &data
->c_arg
,
1293 .rpc_resp
= &data
->c_res
,
1294 .rpc_cred
= data
->owner
->so_cred
,
1296 struct rpc_task_setup task_setup_data
= {
1297 .rpc_client
= server
->client
,
1298 .rpc_message
= &msg
,
1299 .callback_ops
= &nfs4_open_confirm_ops
,
1300 .callback_data
= data
,
1301 .workqueue
= nfsiod_workqueue
,
1302 .flags
= RPC_TASK_ASYNC
,
1306 kref_get(&data
->kref
);
1308 data
->rpc_status
= 0;
1309 data
->timestamp
= jiffies
;
1310 task
= rpc_run_task(&task_setup_data
);
1312 return PTR_ERR(task
);
1313 status
= nfs4_wait_for_completion_rpc_task(task
);
1315 data
->cancelled
= 1;
1318 status
= data
->rpc_status
;
1323 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
1325 struct nfs4_opendata
*data
= calldata
;
1326 struct nfs4_state_owner
*sp
= data
->owner
;
1328 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
1331 * Check if we still need to send an OPEN call, or if we can use
1332 * a delegation instead.
1334 if (data
->state
!= NULL
) {
1335 struct nfs_delegation
*delegation
;
1337 if (can_open_cached(data
->state
, data
->o_arg
.fmode
, data
->o_arg
.open_flags
))
1340 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
1341 if (delegation
!= NULL
&&
1342 test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) == 0) {
1348 /* Update sequence id. */
1349 data
->o_arg
.id
= sp
->so_owner_id
.id
;
1350 data
->o_arg
.clientid
= sp
->so_client
->cl_clientid
;
1351 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
) {
1352 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
1353 nfs_copy_fh(&data
->o_res
.fh
, data
->o_arg
.fh
);
1355 data
->timestamp
= jiffies
;
1356 if (nfs4_setup_sequence(data
->o_arg
.server
->nfs_client
,
1357 &data
->o_arg
.seq_args
,
1358 &data
->o_res
.seq_res
, 1, task
))
1360 rpc_call_start(task
);
1363 task
->tk_action
= NULL
;
1367 static void nfs4_recover_open_prepare(struct rpc_task
*task
, void *calldata
)
1369 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
1370 nfs4_open_prepare(task
, calldata
);
1373 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
1375 struct nfs4_opendata
*data
= calldata
;
1377 data
->rpc_status
= task
->tk_status
;
1379 nfs4_sequence_done(data
->o_arg
.server
, &data
->o_res
.seq_res
,
1382 if (RPC_ASSASSINATED(task
))
1384 if (task
->tk_status
== 0) {
1385 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
1389 data
->rpc_status
= -ELOOP
;
1392 data
->rpc_status
= -EISDIR
;
1395 data
->rpc_status
= -ENOTDIR
;
1397 renew_lease(data
->o_res
.server
, data
->timestamp
);
1398 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
1399 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
1404 static void nfs4_open_release(void *calldata
)
1406 struct nfs4_opendata
*data
= calldata
;
1407 struct nfs4_state
*state
= NULL
;
1409 /* If this request hasn't been cancelled, do nothing */
1410 if (data
->cancelled
== 0)
1412 /* In case of error, no cleanup! */
1413 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
1415 /* In case we need an open_confirm, no cleanup! */
1416 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
1418 state
= nfs4_opendata_to_nfs4_state(data
);
1420 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
1422 nfs4_opendata_put(data
);
1425 static const struct rpc_call_ops nfs4_open_ops
= {
1426 .rpc_call_prepare
= nfs4_open_prepare
,
1427 .rpc_call_done
= nfs4_open_done
,
1428 .rpc_release
= nfs4_open_release
,
1431 static const struct rpc_call_ops nfs4_recover_open_ops
= {
1432 .rpc_call_prepare
= nfs4_recover_open_prepare
,
1433 .rpc_call_done
= nfs4_open_done
,
1434 .rpc_release
= nfs4_open_release
,
1437 static int nfs4_run_open_task(struct nfs4_opendata
*data
, int isrecover
)
1439 struct inode
*dir
= data
->dir
->d_inode
;
1440 struct nfs_server
*server
= NFS_SERVER(dir
);
1441 struct nfs_openargs
*o_arg
= &data
->o_arg
;
1442 struct nfs_openres
*o_res
= &data
->o_res
;
1443 struct rpc_task
*task
;
1444 struct rpc_message msg
= {
1445 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
1448 .rpc_cred
= data
->owner
->so_cred
,
1450 struct rpc_task_setup task_setup_data
= {
1451 .rpc_client
= server
->client
,
1452 .rpc_message
= &msg
,
1453 .callback_ops
= &nfs4_open_ops
,
1454 .callback_data
= data
,
1455 .workqueue
= nfsiod_workqueue
,
1456 .flags
= RPC_TASK_ASYNC
,
1460 kref_get(&data
->kref
);
1462 data
->rpc_status
= 0;
1463 data
->cancelled
= 0;
1465 task_setup_data
.callback_ops
= &nfs4_recover_open_ops
;
1466 task
= rpc_run_task(&task_setup_data
);
1468 return PTR_ERR(task
);
1469 status
= nfs4_wait_for_completion_rpc_task(task
);
1471 data
->cancelled
= 1;
1474 status
= data
->rpc_status
;
1480 static int _nfs4_recover_proc_open(struct nfs4_opendata
*data
)
1482 struct inode
*dir
= data
->dir
->d_inode
;
1483 struct nfs_openres
*o_res
= &data
->o_res
;
1486 status
= nfs4_run_open_task(data
, 1);
1487 if (status
!= 0 || !data
->rpc_done
)
1490 nfs_refresh_inode(dir
, o_res
->dir_attr
);
1492 if (o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1493 status
= _nfs4_proc_open_confirm(data
);
1502 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1504 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
1506 struct inode
*dir
= data
->dir
->d_inode
;
1507 struct nfs_server
*server
= NFS_SERVER(dir
);
1508 struct nfs_openargs
*o_arg
= &data
->o_arg
;
1509 struct nfs_openres
*o_res
= &data
->o_res
;
1512 status
= nfs4_run_open_task(data
, 0);
1513 if (status
!= 0 || !data
->rpc_done
)
1516 if (o_arg
->open_flags
& O_CREAT
) {
1517 update_changeattr(dir
, &o_res
->cinfo
);
1518 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
1520 nfs_refresh_inode(dir
, o_res
->dir_attr
);
1521 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1522 status
= _nfs4_proc_open_confirm(data
);
1526 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
1527 _nfs4_proc_getattr(server
, &o_res
->fh
, o_res
->f_attr
);
1531 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
1533 struct nfs_client
*clp
= server
->nfs_client
;
1537 for (loop
= NFS4_MAX_LOOP_ON_RECOVER
; loop
!= 0; loop
--) {
1538 ret
= nfs4_wait_clnt_recover(clp
);
1541 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
1542 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
1544 nfs4_schedule_state_recovery(clp
);
1552 * reclaim state on the server after a network partition.
1553 * Assumes caller holds the appropriate lock
1555 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1557 struct nfs4_opendata
*opendata
;
1560 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1561 if (IS_ERR(opendata
))
1562 return PTR_ERR(opendata
);
1563 ret
= nfs4_open_recover(opendata
, state
);
1565 d_drop(ctx
->path
.dentry
);
1566 nfs4_opendata_put(opendata
);
1570 static int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1572 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1573 struct nfs4_exception exception
= { };
1577 err
= _nfs4_open_expired(ctx
, state
);
1581 case -NFS4ERR_GRACE
:
1582 case -NFS4ERR_DELAY
:
1583 nfs4_handle_exception(server
, err
, &exception
);
1586 } while (exception
.retry
);
1591 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1593 struct nfs_open_context
*ctx
;
1596 ctx
= nfs4_state_find_open_context(state
);
1598 return PTR_ERR(ctx
);
1599 ret
= nfs4_do_open_expired(ctx
, state
);
1600 put_nfs_open_context(ctx
);
1605 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1606 * fields corresponding to attributes that were used to store the verifier.
1607 * Make sure we clobber those fields in the later setattr call
1609 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1611 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1612 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1613 sattr
->ia_valid
|= ATTR_ATIME
;
1615 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1616 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1617 sattr
->ia_valid
|= ATTR_MTIME
;
1621 * Returns a referenced nfs4_state
1623 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
)
1625 struct nfs4_state_owner
*sp
;
1626 struct nfs4_state
*state
= NULL
;
1627 struct nfs_server
*server
= NFS_SERVER(dir
);
1628 struct nfs4_opendata
*opendata
;
1631 /* Protect against reboot recovery conflicts */
1633 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1634 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1637 status
= nfs4_recover_expired_lease(server
);
1639 goto err_put_state_owner
;
1640 if (path
->dentry
->d_inode
!= NULL
)
1641 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, fmode
);
1643 opendata
= nfs4_opendata_alloc(path
, sp
, fmode
, flags
, sattr
);
1644 if (opendata
== NULL
)
1645 goto err_put_state_owner
;
1647 if (path
->dentry
->d_inode
!= NULL
)
1648 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1650 status
= _nfs4_proc_open(opendata
);
1652 goto err_opendata_put
;
1654 if (opendata
->o_arg
.open_flags
& O_EXCL
)
1655 nfs4_exclusive_attrset(opendata
, sattr
);
1657 state
= nfs4_opendata_to_nfs4_state(opendata
);
1658 status
= PTR_ERR(state
);
1660 goto err_opendata_put
;
1661 if ((opendata
->o_res
.rflags
& NFS4_OPEN_RESULT_LOCKTYPE_POSIX
) != 0)
1662 set_bit(NFS_STATE_POSIX_LOCKS
, &state
->flags
);
1663 nfs4_opendata_put(opendata
);
1664 nfs4_put_state_owner(sp
);
1668 nfs4_opendata_put(opendata
);
1669 err_put_state_owner
:
1670 nfs4_put_state_owner(sp
);
1677 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
)
1679 struct nfs4_exception exception
= { };
1680 struct nfs4_state
*res
;
1684 status
= _nfs4_do_open(dir
, path
, fmode
, flags
, sattr
, cred
, &res
);
1687 /* NOTE: BAD_SEQID means the server and client disagree about the
1688 * book-keeping w.r.t. state-changing operations
1689 * (OPEN/CLOSE/LOCK/LOCKU...)
1690 * It is actually a sign of a bug on the client or on the server.
1692 * If we receive a BAD_SEQID error in the particular case of
1693 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1694 * have unhashed the old state_owner for us, and that we can
1695 * therefore safely retry using a new one. We should still warn
1696 * the user though...
1698 if (status
== -NFS4ERR_BAD_SEQID
) {
1699 printk(KERN_WARNING
"NFS: v4 server %s "
1700 " returned a bad sequence-id error!\n",
1701 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1702 exception
.retry
= 1;
1706 * BAD_STATEID on OPEN means that the server cancelled our
1707 * state before it received the OPEN_CONFIRM.
1708 * Recover by retrying the request as per the discussion
1709 * on Page 181 of RFC3530.
1711 if (status
== -NFS4ERR_BAD_STATEID
) {
1712 exception
.retry
= 1;
1715 if (status
== -EAGAIN
) {
1716 /* We must have found a delegation */
1717 exception
.retry
= 1;
1720 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1721 status
, &exception
));
1722 } while (exception
.retry
);
1726 static int _nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1727 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1728 struct nfs4_state
*state
)
1730 struct nfs_server
*server
= NFS_SERVER(inode
);
1731 struct nfs_setattrargs arg
= {
1732 .fh
= NFS_FH(inode
),
1735 .bitmask
= server
->attr_bitmask
,
1737 struct nfs_setattrres res
= {
1741 struct rpc_message msg
= {
1742 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1747 unsigned long timestamp
= jiffies
;
1750 nfs_fattr_init(fattr
);
1752 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1753 /* Use that stateid */
1754 } else if (state
!= NULL
) {
1755 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1757 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1759 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
1760 if (status
== 0 && state
!= NULL
)
1761 renew_lease(server
, timestamp
);
1765 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1766 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1767 struct nfs4_state
*state
)
1769 struct nfs_server
*server
= NFS_SERVER(inode
);
1770 struct nfs4_exception exception
= { };
1773 err
= nfs4_handle_exception(server
,
1774 _nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
),
1776 } while (exception
.retry
);
1780 struct nfs4_closedata
{
1782 struct inode
*inode
;
1783 struct nfs4_state
*state
;
1784 struct nfs_closeargs arg
;
1785 struct nfs_closeres res
;
1786 struct nfs_fattr fattr
;
1787 unsigned long timestamp
;
1790 static void nfs4_free_closedata(void *data
)
1792 struct nfs4_closedata
*calldata
= data
;
1793 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1795 nfs4_put_open_state(calldata
->state
);
1796 nfs_free_seqid(calldata
->arg
.seqid
);
1797 nfs4_put_state_owner(sp
);
1798 path_put(&calldata
->path
);
1802 static void nfs4_close_clear_stateid_flags(struct nfs4_state
*state
,
1805 spin_lock(&state
->owner
->so_lock
);
1806 if (!(fmode
& FMODE_READ
))
1807 clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1808 if (!(fmode
& FMODE_WRITE
))
1809 clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1810 clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1811 spin_unlock(&state
->owner
->so_lock
);
1814 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1816 struct nfs4_closedata
*calldata
= data
;
1817 struct nfs4_state
*state
= calldata
->state
;
1818 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1820 nfs4_sequence_done(server
, &calldata
->res
.seq_res
, task
->tk_status
);
1821 if (RPC_ASSASSINATED(task
))
1823 /* hmm. we are done with the inode, and in the process of freeing
1824 * the state_owner. we keep this around to process errors
1826 switch (task
->tk_status
) {
1828 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, 0);
1829 renew_lease(server
, calldata
->timestamp
);
1830 nfs4_close_clear_stateid_flags(state
,
1831 calldata
->arg
.fmode
);
1833 case -NFS4ERR_STALE_STATEID
:
1834 case -NFS4ERR_OLD_STATEID
:
1835 case -NFS4ERR_BAD_STATEID
:
1836 case -NFS4ERR_EXPIRED
:
1837 if (calldata
->arg
.fmode
== 0)
1840 if (nfs4_async_handle_error(task
, server
, state
) == -EAGAIN
)
1841 rpc_restart_call_prepare(task
);
1843 nfs_release_seqid(calldata
->arg
.seqid
);
1844 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1847 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1849 struct nfs4_closedata
*calldata
= data
;
1850 struct nfs4_state
*state
= calldata
->state
;
1853 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1856 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1857 calldata
->arg
.fmode
= FMODE_READ
|FMODE_WRITE
;
1858 spin_lock(&state
->owner
->so_lock
);
1859 /* Calculate the change in open mode */
1860 if (state
->n_rdwr
== 0) {
1861 if (state
->n_rdonly
== 0) {
1862 call_close
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1863 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1864 calldata
->arg
.fmode
&= ~FMODE_READ
;
1866 if (state
->n_wronly
== 0) {
1867 call_close
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1868 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1869 calldata
->arg
.fmode
&= ~FMODE_WRITE
;
1872 spin_unlock(&state
->owner
->so_lock
);
1875 /* Note: exit _without_ calling nfs4_close_done */
1876 task
->tk_action
= NULL
;
1880 if (calldata
->arg
.fmode
== 0)
1881 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
];
1883 nfs_fattr_init(calldata
->res
.fattr
);
1884 calldata
->timestamp
= jiffies
;
1885 if (nfs4_setup_sequence((NFS_SERVER(calldata
->inode
))->nfs_client
,
1886 &calldata
->arg
.seq_args
, &calldata
->res
.seq_res
,
1889 rpc_call_start(task
);
1892 static const struct rpc_call_ops nfs4_close_ops
= {
1893 .rpc_call_prepare
= nfs4_close_prepare
,
1894 .rpc_call_done
= nfs4_close_done
,
1895 .rpc_release
= nfs4_free_closedata
,
1899 * It is possible for data to be read/written from a mem-mapped file
1900 * after the sys_close call (which hits the vfs layer as a flush).
1901 * This means that we can't safely call nfsv4 close on a file until
1902 * the inode is cleared. This in turn means that we are not good
1903 * NFSv4 citizens - we do not indicate to the server to update the file's
1904 * share state even when we are done with one of the three share
1905 * stateid's in the inode.
1907 * NOTE: Caller must be holding the sp->so_owner semaphore!
1909 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
, int wait
)
1911 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1912 struct nfs4_closedata
*calldata
;
1913 struct nfs4_state_owner
*sp
= state
->owner
;
1914 struct rpc_task
*task
;
1915 struct rpc_message msg
= {
1916 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1917 .rpc_cred
= state
->owner
->so_cred
,
1919 struct rpc_task_setup task_setup_data
= {
1920 .rpc_client
= server
->client
,
1921 .rpc_message
= &msg
,
1922 .callback_ops
= &nfs4_close_ops
,
1923 .workqueue
= nfsiod_workqueue
,
1924 .flags
= RPC_TASK_ASYNC
,
1926 int status
= -ENOMEM
;
1928 calldata
= kzalloc(sizeof(*calldata
), GFP_KERNEL
);
1929 if (calldata
== NULL
)
1931 calldata
->inode
= state
->inode
;
1932 calldata
->state
= state
;
1933 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1934 calldata
->arg
.stateid
= &state
->open_stateid
;
1935 /* Serialization for the sequence id */
1936 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
1937 if (calldata
->arg
.seqid
== NULL
)
1938 goto out_free_calldata
;
1939 calldata
->arg
.fmode
= 0;
1940 calldata
->arg
.bitmask
= server
->cache_consistency_bitmask
;
1941 calldata
->res
.fattr
= &calldata
->fattr
;
1942 calldata
->res
.seqid
= calldata
->arg
.seqid
;
1943 calldata
->res
.server
= server
;
1944 calldata
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
1945 calldata
->path
.mnt
= mntget(path
->mnt
);
1946 calldata
->path
.dentry
= dget(path
->dentry
);
1948 msg
.rpc_argp
= &calldata
->arg
,
1949 msg
.rpc_resp
= &calldata
->res
,
1950 task_setup_data
.callback_data
= calldata
;
1951 task
= rpc_run_task(&task_setup_data
);
1953 return PTR_ERR(task
);
1956 status
= rpc_wait_for_completion_task(task
);
1962 nfs4_put_open_state(state
);
1963 nfs4_put_state_owner(sp
);
1967 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
, fmode_t fmode
)
1972 /* If the open_intent is for execute, we have an extra check to make */
1973 if (fmode
& FMODE_EXEC
) {
1974 ret
= nfs_may_open(state
->inode
,
1975 state
->owner
->so_cred
,
1976 nd
->intent
.open
.flags
);
1980 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
1981 if (!IS_ERR(filp
)) {
1982 struct nfs_open_context
*ctx
;
1983 ctx
= nfs_file_open_context(filp
);
1987 ret
= PTR_ERR(filp
);
1989 nfs4_close_sync(path
, state
, fmode
& (FMODE_READ
|FMODE_WRITE
));
1994 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
1996 struct path path
= {
1997 .mnt
= nd
->path
.mnt
,
2000 struct dentry
*parent
;
2002 struct rpc_cred
*cred
;
2003 struct nfs4_state
*state
;
2005 fmode_t fmode
= nd
->intent
.open
.flags
& (FMODE_READ
| FMODE_WRITE
| FMODE_EXEC
);
2007 if (nd
->flags
& LOOKUP_CREATE
) {
2008 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
2009 attr
.ia_valid
= ATTR_MODE
;
2010 if (!IS_POSIXACL(dir
))
2011 attr
.ia_mode
&= ~current_umask();
2014 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
2017 cred
= rpc_lookup_cred();
2019 return (struct dentry
*)cred
;
2020 parent
= dentry
->d_parent
;
2021 /* Protect against concurrent sillydeletes */
2022 nfs_block_sillyrename(parent
);
2023 state
= nfs4_do_open(dir
, &path
, fmode
, nd
->intent
.open
.flags
, &attr
, cred
);
2025 if (IS_ERR(state
)) {
2026 if (PTR_ERR(state
) == -ENOENT
) {
2027 d_add(dentry
, NULL
);
2028 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2030 nfs_unblock_sillyrename(parent
);
2031 return (struct dentry
*)state
;
2033 res
= d_add_unique(dentry
, igrab(state
->inode
));
2036 nfs_set_verifier(path
.dentry
, nfs_save_change_attribute(dir
));
2037 nfs_unblock_sillyrename(parent
);
2038 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2043 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
2045 struct path path
= {
2046 .mnt
= nd
->path
.mnt
,
2049 struct rpc_cred
*cred
;
2050 struct nfs4_state
*state
;
2051 fmode_t fmode
= openflags
& (FMODE_READ
| FMODE_WRITE
);
2053 cred
= rpc_lookup_cred();
2055 return PTR_ERR(cred
);
2056 state
= nfs4_do_open(dir
, &path
, fmode
, openflags
, NULL
, cred
);
2058 if (IS_ERR(state
)) {
2059 switch (PTR_ERR(state
)) {
2065 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
2071 if (state
->inode
== dentry
->d_inode
) {
2072 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2073 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2076 nfs4_close_sync(&path
, state
, fmode
);
2082 static void nfs4_close_context(struct nfs_open_context
*ctx
, int is_sync
)
2084 if (ctx
->state
== NULL
)
2087 nfs4_close_sync(&ctx
->path
, ctx
->state
, ctx
->mode
);
2089 nfs4_close_state(&ctx
->path
, ctx
->state
, ctx
->mode
);
2092 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
2094 struct nfs4_server_caps_arg args
= {
2097 struct nfs4_server_caps_res res
= {};
2098 struct rpc_message msg
= {
2099 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
2105 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2107 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
2108 server
->caps
&= ~(NFS_CAP_ACLS
|NFS_CAP_HARDLINKS
|
2109 NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
2110 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|
2111 NFS_CAP_OWNER_GROUP
|NFS_CAP_ATIME
|
2112 NFS_CAP_CTIME
|NFS_CAP_MTIME
);
2113 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
2114 server
->caps
|= NFS_CAP_ACLS
;
2115 if (res
.has_links
!= 0)
2116 server
->caps
|= NFS_CAP_HARDLINKS
;
2117 if (res
.has_symlinks
!= 0)
2118 server
->caps
|= NFS_CAP_SYMLINKS
;
2119 if (res
.attr_bitmask
[0] & FATTR4_WORD0_FILEID
)
2120 server
->caps
|= NFS_CAP_FILEID
;
2121 if (res
.attr_bitmask
[1] & FATTR4_WORD1_MODE
)
2122 server
->caps
|= NFS_CAP_MODE
;
2123 if (res
.attr_bitmask
[1] & FATTR4_WORD1_NUMLINKS
)
2124 server
->caps
|= NFS_CAP_NLINK
;
2125 if (res
.attr_bitmask
[1] & FATTR4_WORD1_OWNER
)
2126 server
->caps
|= NFS_CAP_OWNER
;
2127 if (res
.attr_bitmask
[1] & FATTR4_WORD1_OWNER_GROUP
)
2128 server
->caps
|= NFS_CAP_OWNER_GROUP
;
2129 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_ACCESS
)
2130 server
->caps
|= NFS_CAP_ATIME
;
2131 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_METADATA
)
2132 server
->caps
|= NFS_CAP_CTIME
;
2133 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_MODIFY
)
2134 server
->caps
|= NFS_CAP_MTIME
;
2136 memcpy(server
->cache_consistency_bitmask
, res
.attr_bitmask
, sizeof(server
->cache_consistency_bitmask
));
2137 server
->cache_consistency_bitmask
[0] &= FATTR4_WORD0_CHANGE
|FATTR4_WORD0_SIZE
;
2138 server
->cache_consistency_bitmask
[1] &= FATTR4_WORD1_TIME_METADATA
|FATTR4_WORD1_TIME_MODIFY
;
2139 server
->acl_bitmask
= res
.acl_bitmask
;
2145 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
2147 struct nfs4_exception exception
= { };
2150 err
= nfs4_handle_exception(server
,
2151 _nfs4_server_capabilities(server
, fhandle
),
2153 } while (exception
.retry
);
2157 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2158 struct nfs_fsinfo
*info
)
2160 struct nfs4_lookup_root_arg args
= {
2161 .bitmask
= nfs4_fattr_bitmap
,
2163 struct nfs4_lookup_res res
= {
2165 .fattr
= info
->fattr
,
2168 struct rpc_message msg
= {
2169 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
2174 nfs_fattr_init(info
->fattr
);
2175 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2178 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2179 struct nfs_fsinfo
*info
)
2181 struct nfs4_exception exception
= { };
2184 err
= nfs4_handle_exception(server
,
2185 _nfs4_lookup_root(server
, fhandle
, info
),
2187 } while (exception
.retry
);
2192 * get the file handle for the "/" directory on the server
2194 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2195 struct nfs_fsinfo
*info
)
2199 status
= nfs4_lookup_root(server
, fhandle
, info
);
2201 status
= nfs4_server_capabilities(server
, fhandle
);
2203 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
2204 return nfs4_map_errors(status
);
2208 * Get locations and (maybe) other attributes of a referral.
2209 * Note that we'll actually follow the referral later when
2210 * we detect fsid mismatch in inode revalidation
2212 static int nfs4_get_referral(struct inode
*dir
, const struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
2214 int status
= -ENOMEM
;
2215 struct page
*page
= NULL
;
2216 struct nfs4_fs_locations
*locations
= NULL
;
2218 page
= alloc_page(GFP_KERNEL
);
2221 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
2222 if (locations
== NULL
)
2225 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
2228 /* Make sure server returned a different fsid for the referral */
2229 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
2230 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__
, name
->name
);
2235 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
2236 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
2238 fattr
->mode
= S_IFDIR
;
2239 memset(fhandle
, 0, sizeof(struct nfs_fh
));
2248 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2250 struct nfs4_getattr_arg args
= {
2252 .bitmask
= server
->attr_bitmask
,
2254 struct nfs4_getattr_res res
= {
2258 struct rpc_message msg
= {
2259 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
2264 nfs_fattr_init(fattr
);
2265 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2268 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2270 struct nfs4_exception exception
= { };
2273 err
= nfs4_handle_exception(server
,
2274 _nfs4_proc_getattr(server
, fhandle
, fattr
),
2276 } while (exception
.retry
);
2281 * The file is not closed if it is opened due to the a request to change
2282 * the size of the file. The open call will not be needed once the
2283 * VFS layer lookup-intents are implemented.
2285 * Close is called when the inode is destroyed.
2286 * If we haven't opened the file for O_WRONLY, we
2287 * need to in the size_change case to obtain a stateid.
2290 * Because OPEN is always done by name in nfsv4, it is
2291 * possible that we opened a different file by the same
2292 * name. We can recognize this race condition, but we
2293 * can't do anything about it besides returning an error.
2295 * This will be fixed with VFS changes (lookup-intent).
2298 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
2299 struct iattr
*sattr
)
2301 struct inode
*inode
= dentry
->d_inode
;
2302 struct rpc_cred
*cred
= NULL
;
2303 struct nfs4_state
*state
= NULL
;
2306 nfs_fattr_init(fattr
);
2308 /* Search for an existing open(O_WRITE) file */
2309 if (sattr
->ia_valid
& ATTR_FILE
) {
2310 struct nfs_open_context
*ctx
;
2312 ctx
= nfs_file_open_context(sattr
->ia_file
);
2319 status
= nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
);
2321 nfs_setattr_update_inode(inode
, sattr
);
2325 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, const struct nfs_fh
*dirfh
,
2326 const struct qstr
*name
, struct nfs_fh
*fhandle
,
2327 struct nfs_fattr
*fattr
)
2330 struct nfs4_lookup_arg args
= {
2331 .bitmask
= server
->attr_bitmask
,
2335 struct nfs4_lookup_res res
= {
2340 struct rpc_message msg
= {
2341 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
2346 nfs_fattr_init(fattr
);
2348 dprintk("NFS call lookupfh %s\n", name
->name
);
2349 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2350 dprintk("NFS reply lookupfh: %d\n", status
);
2354 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
2355 struct qstr
*name
, struct nfs_fh
*fhandle
,
2356 struct nfs_fattr
*fattr
)
2358 struct nfs4_exception exception
= { };
2361 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
2363 if (err
== -NFS4ERR_MOVED
) {
2367 err
= nfs4_handle_exception(server
, err
, &exception
);
2368 } while (exception
.retry
);
2372 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
,
2373 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2377 dprintk("NFS call lookup %s\n", name
->name
);
2378 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
2379 if (status
== -NFS4ERR_MOVED
)
2380 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
2381 dprintk("NFS reply lookup: %d\n", status
);
2385 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2387 struct nfs4_exception exception
= { };
2390 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2391 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
2393 } while (exception
.retry
);
2397 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
2399 struct nfs_server
*server
= NFS_SERVER(inode
);
2400 struct nfs_fattr fattr
;
2401 struct nfs4_accessargs args
= {
2402 .fh
= NFS_FH(inode
),
2403 .bitmask
= server
->attr_bitmask
,
2405 struct nfs4_accessres res
= {
2409 struct rpc_message msg
= {
2410 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
2413 .rpc_cred
= entry
->cred
,
2415 int mode
= entry
->mask
;
2419 * Determine which access bits we want to ask for...
2421 if (mode
& MAY_READ
)
2422 args
.access
|= NFS4_ACCESS_READ
;
2423 if (S_ISDIR(inode
->i_mode
)) {
2424 if (mode
& MAY_WRITE
)
2425 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
2426 if (mode
& MAY_EXEC
)
2427 args
.access
|= NFS4_ACCESS_LOOKUP
;
2429 if (mode
& MAY_WRITE
)
2430 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
2431 if (mode
& MAY_EXEC
)
2432 args
.access
|= NFS4_ACCESS_EXECUTE
;
2434 nfs_fattr_init(&fattr
);
2435 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2438 if (res
.access
& NFS4_ACCESS_READ
)
2439 entry
->mask
|= MAY_READ
;
2440 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
2441 entry
->mask
|= MAY_WRITE
;
2442 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
2443 entry
->mask
|= MAY_EXEC
;
2444 nfs_refresh_inode(inode
, &fattr
);
2449 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
2451 struct nfs4_exception exception
= { };
2454 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2455 _nfs4_proc_access(inode
, entry
),
2457 } while (exception
.retry
);
2462 * TODO: For the time being, we don't try to get any attributes
2463 * along with any of the zero-copy operations READ, READDIR,
2466 * In the case of the first three, we want to put the GETATTR
2467 * after the read-type operation -- this is because it is hard
2468 * to predict the length of a GETATTR response in v4, and thus
2469 * align the READ data correctly. This means that the GETATTR
2470 * may end up partially falling into the page cache, and we should
2471 * shift it into the 'tail' of the xdr_buf before processing.
2472 * To do this efficiently, we need to know the total length
2473 * of data received, which doesn't seem to be available outside
2476 * In the case of WRITE, we also want to put the GETATTR after
2477 * the operation -- in this case because we want to make sure
2478 * we get the post-operation mtime and size. This means that
2479 * we can't use xdr_encode_pages() as written: we need a variant
2480 * of it which would leave room in the 'tail' iovec.
2482 * Both of these changes to the XDR layer would in fact be quite
2483 * minor, but I decided to leave them for a subsequent patch.
2485 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2486 unsigned int pgbase
, unsigned int pglen
)
2488 struct nfs4_readlink args
= {
2489 .fh
= NFS_FH(inode
),
2494 struct nfs4_readlink_res res
;
2495 struct rpc_message msg
= {
2496 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
2501 return nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
2504 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2505 unsigned int pgbase
, unsigned int pglen
)
2507 struct nfs4_exception exception
= { };
2510 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2511 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
2513 } while (exception
.retry
);
2519 * We will need to arrange for the VFS layer to provide an atomic open.
2520 * Until then, this create/open method is prone to inefficiency and race
2521 * conditions due to the lookup, create, and open VFS calls from sys_open()
2522 * placed on the wire.
2524 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2525 * The file will be opened again in the subsequent VFS open call
2526 * (nfs4_proc_file_open).
2528 * The open for read will just hang around to be used by any process that
2529 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2533 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
2534 int flags
, struct nameidata
*nd
)
2536 struct path path
= {
2537 .mnt
= nd
->path
.mnt
,
2540 struct nfs4_state
*state
;
2541 struct rpc_cred
*cred
;
2542 fmode_t fmode
= flags
& (FMODE_READ
| FMODE_WRITE
);
2545 cred
= rpc_lookup_cred();
2547 status
= PTR_ERR(cred
);
2550 state
= nfs4_do_open(dir
, &path
, fmode
, flags
, sattr
, cred
);
2552 if (IS_ERR(state
)) {
2553 status
= PTR_ERR(state
);
2556 d_add(dentry
, igrab(state
->inode
));
2557 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2558 if (flags
& O_EXCL
) {
2559 struct nfs_fattr fattr
;
2560 status
= nfs4_do_setattr(state
->inode
, cred
, &fattr
, sattr
, state
);
2562 nfs_setattr_update_inode(state
->inode
, sattr
);
2563 nfs_post_op_update_inode(state
->inode
, &fattr
);
2565 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
2566 status
= nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2568 nfs4_close_sync(&path
, state
, fmode
);
2575 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2577 struct nfs_server
*server
= NFS_SERVER(dir
);
2578 struct nfs_removeargs args
= {
2580 .name
.len
= name
->len
,
2581 .name
.name
= name
->name
,
2582 .bitmask
= server
->attr_bitmask
,
2584 struct nfs_removeres res
= {
2587 struct rpc_message msg
= {
2588 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
2594 nfs_fattr_init(&res
.dir_attr
);
2595 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 1);
2597 update_changeattr(dir
, &res
.cinfo
);
2598 nfs_post_op_update_inode(dir
, &res
.dir_attr
);
2603 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2605 struct nfs4_exception exception
= { };
2608 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2609 _nfs4_proc_remove(dir
, name
),
2611 } while (exception
.retry
);
2615 static void nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct inode
*dir
)
2617 struct nfs_server
*server
= NFS_SERVER(dir
);
2618 struct nfs_removeargs
*args
= msg
->rpc_argp
;
2619 struct nfs_removeres
*res
= msg
->rpc_resp
;
2621 args
->bitmask
= server
->cache_consistency_bitmask
;
2622 res
->server
= server
;
2623 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
2626 static int nfs4_proc_unlink_done(struct rpc_task
*task
, struct inode
*dir
)
2628 struct nfs_removeres
*res
= task
->tk_msg
.rpc_resp
;
2630 nfs4_sequence_done(res
->server
, &res
->seq_res
, task
->tk_status
);
2631 if (nfs4_async_handle_error(task
, res
->server
, NULL
) == -EAGAIN
)
2633 update_changeattr(dir
, &res
->cinfo
);
2634 nfs_post_op_update_inode(dir
, &res
->dir_attr
);
2638 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2639 struct inode
*new_dir
, struct qstr
*new_name
)
2641 struct nfs_server
*server
= NFS_SERVER(old_dir
);
2642 struct nfs4_rename_arg arg
= {
2643 .old_dir
= NFS_FH(old_dir
),
2644 .new_dir
= NFS_FH(new_dir
),
2645 .old_name
= old_name
,
2646 .new_name
= new_name
,
2647 .bitmask
= server
->attr_bitmask
,
2649 struct nfs_fattr old_fattr
, new_fattr
;
2650 struct nfs4_rename_res res
= {
2652 .old_fattr
= &old_fattr
,
2653 .new_fattr
= &new_fattr
,
2655 struct rpc_message msg
= {
2656 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2662 nfs_fattr_init(res
.old_fattr
);
2663 nfs_fattr_init(res
.new_fattr
);
2664 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2667 update_changeattr(old_dir
, &res
.old_cinfo
);
2668 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2669 update_changeattr(new_dir
, &res
.new_cinfo
);
2670 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2675 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2676 struct inode
*new_dir
, struct qstr
*new_name
)
2678 struct nfs4_exception exception
= { };
2681 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2682 _nfs4_proc_rename(old_dir
, old_name
,
2685 } while (exception
.retry
);
2689 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2691 struct nfs_server
*server
= NFS_SERVER(inode
);
2692 struct nfs4_link_arg arg
= {
2693 .fh
= NFS_FH(inode
),
2694 .dir_fh
= NFS_FH(dir
),
2696 .bitmask
= server
->attr_bitmask
,
2698 struct nfs_fattr fattr
, dir_attr
;
2699 struct nfs4_link_res res
= {
2702 .dir_attr
= &dir_attr
,
2704 struct rpc_message msg
= {
2705 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2711 nfs_fattr_init(res
.fattr
);
2712 nfs_fattr_init(res
.dir_attr
);
2713 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2715 update_changeattr(dir
, &res
.cinfo
);
2716 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2717 nfs_post_op_update_inode(inode
, res
.fattr
);
2723 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2725 struct nfs4_exception exception
= { };
2728 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2729 _nfs4_proc_link(inode
, dir
, name
),
2731 } while (exception
.retry
);
2735 struct nfs4_createdata
{
2736 struct rpc_message msg
;
2737 struct nfs4_create_arg arg
;
2738 struct nfs4_create_res res
;
2740 struct nfs_fattr fattr
;
2741 struct nfs_fattr dir_fattr
;
2744 static struct nfs4_createdata
*nfs4_alloc_createdata(struct inode
*dir
,
2745 struct qstr
*name
, struct iattr
*sattr
, u32 ftype
)
2747 struct nfs4_createdata
*data
;
2749 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
2751 struct nfs_server
*server
= NFS_SERVER(dir
);
2753 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
];
2754 data
->msg
.rpc_argp
= &data
->arg
;
2755 data
->msg
.rpc_resp
= &data
->res
;
2756 data
->arg
.dir_fh
= NFS_FH(dir
);
2757 data
->arg
.server
= server
;
2758 data
->arg
.name
= name
;
2759 data
->arg
.attrs
= sattr
;
2760 data
->arg
.ftype
= ftype
;
2761 data
->arg
.bitmask
= server
->attr_bitmask
;
2762 data
->res
.server
= server
;
2763 data
->res
.fh
= &data
->fh
;
2764 data
->res
.fattr
= &data
->fattr
;
2765 data
->res
.dir_fattr
= &data
->dir_fattr
;
2766 nfs_fattr_init(data
->res
.fattr
);
2767 nfs_fattr_init(data
->res
.dir_fattr
);
2772 static int nfs4_do_create(struct inode
*dir
, struct dentry
*dentry
, struct nfs4_createdata
*data
)
2774 int status
= nfs4_call_sync(NFS_SERVER(dir
), &data
->msg
,
2775 &data
->arg
, &data
->res
, 1);
2777 update_changeattr(dir
, &data
->res
.dir_cinfo
);
2778 nfs_post_op_update_inode(dir
, data
->res
.dir_fattr
);
2779 status
= nfs_instantiate(dentry
, data
->res
.fh
, data
->res
.fattr
);
2784 static void nfs4_free_createdata(struct nfs4_createdata
*data
)
2789 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2790 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2792 struct nfs4_createdata
*data
;
2793 int status
= -ENAMETOOLONG
;
2795 if (len
> NFS4_MAXPATHLEN
)
2799 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4LNK
);
2803 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
];
2804 data
->arg
.u
.symlink
.pages
= &page
;
2805 data
->arg
.u
.symlink
.len
= len
;
2807 status
= nfs4_do_create(dir
, dentry
, data
);
2809 nfs4_free_createdata(data
);
2814 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2815 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2817 struct nfs4_exception exception
= { };
2820 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2821 _nfs4_proc_symlink(dir
, dentry
, page
,
2824 } while (exception
.retry
);
2828 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2829 struct iattr
*sattr
)
2831 struct nfs4_createdata
*data
;
2832 int status
= -ENOMEM
;
2834 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4DIR
);
2838 status
= nfs4_do_create(dir
, dentry
, data
);
2840 nfs4_free_createdata(data
);
2845 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2846 struct iattr
*sattr
)
2848 struct nfs4_exception exception
= { };
2851 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2852 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2854 } while (exception
.retry
);
2858 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2859 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2861 struct inode
*dir
= dentry
->d_inode
;
2862 struct nfs4_readdir_arg args
= {
2867 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
2869 struct nfs4_readdir_res res
;
2870 struct rpc_message msg
= {
2871 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2878 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__
,
2879 dentry
->d_parent
->d_name
.name
,
2880 dentry
->d_name
.name
,
2881 (unsigned long long)cookie
);
2882 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2883 res
.pgbase
= args
.pgbase
;
2884 status
= nfs4_call_sync(NFS_SERVER(dir
), &msg
, &args
, &res
, 0);
2886 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2888 nfs_invalidate_atime(dir
);
2890 dprintk("%s: returns %d\n", __func__
, status
);
2894 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2895 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2897 struct nfs4_exception exception
= { };
2900 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2901 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2904 } while (exception
.retry
);
2908 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2909 struct iattr
*sattr
, dev_t rdev
)
2911 struct nfs4_createdata
*data
;
2912 int mode
= sattr
->ia_mode
;
2913 int status
= -ENOMEM
;
2915 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2916 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2918 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4SOCK
);
2923 data
->arg
.ftype
= NF4FIFO
;
2924 else if (S_ISBLK(mode
)) {
2925 data
->arg
.ftype
= NF4BLK
;
2926 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2927 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2929 else if (S_ISCHR(mode
)) {
2930 data
->arg
.ftype
= NF4CHR
;
2931 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2932 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2935 status
= nfs4_do_create(dir
, dentry
, data
);
2937 nfs4_free_createdata(data
);
2942 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2943 struct iattr
*sattr
, dev_t rdev
)
2945 struct nfs4_exception exception
= { };
2948 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2949 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2951 } while (exception
.retry
);
2955 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2956 struct nfs_fsstat
*fsstat
)
2958 struct nfs4_statfs_arg args
= {
2960 .bitmask
= server
->attr_bitmask
,
2962 struct nfs4_statfs_res res
= {
2965 struct rpc_message msg
= {
2966 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2971 nfs_fattr_init(fsstat
->fattr
);
2972 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2975 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2977 struct nfs4_exception exception
= { };
2980 err
= nfs4_handle_exception(server
,
2981 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2983 } while (exception
.retry
);
2987 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2988 struct nfs_fsinfo
*fsinfo
)
2990 struct nfs4_fsinfo_arg args
= {
2992 .bitmask
= server
->attr_bitmask
,
2994 struct nfs4_fsinfo_res res
= {
2997 struct rpc_message msg
= {
2998 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
3003 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
3006 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
3008 struct nfs4_exception exception
= { };
3012 err
= nfs4_handle_exception(server
,
3013 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
3015 } while (exception
.retry
);
3019 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
3021 nfs_fattr_init(fsinfo
->fattr
);
3022 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
3025 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3026 struct nfs_pathconf
*pathconf
)
3028 struct nfs4_pathconf_arg args
= {
3030 .bitmask
= server
->attr_bitmask
,
3032 struct nfs4_pathconf_res res
= {
3033 .pathconf
= pathconf
,
3035 struct rpc_message msg
= {
3036 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
3041 /* None of the pathconf attributes are mandatory to implement */
3042 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
3043 memset(pathconf
, 0, sizeof(*pathconf
));
3047 nfs_fattr_init(pathconf
->fattr
);
3048 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
3051 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3052 struct nfs_pathconf
*pathconf
)
3054 struct nfs4_exception exception
= { };
3058 err
= nfs4_handle_exception(server
,
3059 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
3061 } while (exception
.retry
);
3065 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
3067 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
3069 dprintk("--> %s\n", __func__
);
3071 nfs4_sequence_done(server
, &data
->res
.seq_res
, task
->tk_status
);
3073 if (nfs4_async_handle_error(task
, server
, data
->args
.context
->state
) == -EAGAIN
) {
3074 nfs_restart_rpc(task
, server
->nfs_client
);
3078 nfs_invalidate_atime(data
->inode
);
3079 if (task
->tk_status
> 0)
3080 renew_lease(server
, data
->timestamp
);
3084 static void nfs4_proc_read_setup(struct nfs_read_data
*data
, struct rpc_message
*msg
)
3086 data
->timestamp
= jiffies
;
3087 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
];
3090 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
3092 struct inode
*inode
= data
->inode
;
3094 nfs4_sequence_done(NFS_SERVER(inode
), &data
->res
.seq_res
,
3097 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), data
->args
.context
->state
) == -EAGAIN
) {
3098 nfs_restart_rpc(task
, NFS_SERVER(inode
)->nfs_client
);
3101 if (task
->tk_status
>= 0) {
3102 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
3103 nfs_post_op_update_inode_force_wcc(inode
, data
->res
.fattr
);
3108 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
3110 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
3112 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
3113 data
->res
.server
= server
;
3114 data
->timestamp
= jiffies
;
3116 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
];
3119 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
3121 struct inode
*inode
= data
->inode
;
3123 nfs4_sequence_done(NFS_SERVER(inode
), &data
->res
.seq_res
,
3125 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), NULL
) == -EAGAIN
) {
3126 nfs_restart_rpc(task
, NFS_SERVER(inode
)->nfs_client
);
3129 nfs_refresh_inode(inode
, data
->res
.fattr
);
3133 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
3135 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
3137 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
3138 data
->res
.server
= server
;
3139 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
];
3143 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3144 * standalone procedure for queueing an asynchronous RENEW.
3146 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
3148 struct nfs_client
*clp
= (struct nfs_client
*)task
->tk_msg
.rpc_argp
;
3149 unsigned long timestamp
= (unsigned long)data
;
3151 if (task
->tk_status
< 0) {
3152 /* Unless we're shutting down, schedule state recovery! */
3153 if (test_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
) != 0)
3154 nfs4_schedule_state_recovery(clp
);
3157 spin_lock(&clp
->cl_lock
);
3158 if (time_before(clp
->cl_last_renewal
,timestamp
))
3159 clp
->cl_last_renewal
= timestamp
;
3160 spin_unlock(&clp
->cl_lock
);
3163 static const struct rpc_call_ops nfs4_renew_ops
= {
3164 .rpc_call_done
= nfs4_renew_done
,
3167 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3169 struct rpc_message msg
= {
3170 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
3175 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
3176 &nfs4_renew_ops
, (void *)jiffies
);
3179 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3181 struct rpc_message msg
= {
3182 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
3186 unsigned long now
= jiffies
;
3189 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3192 spin_lock(&clp
->cl_lock
);
3193 if (time_before(clp
->cl_last_renewal
,now
))
3194 clp
->cl_last_renewal
= now
;
3195 spin_unlock(&clp
->cl_lock
);
3199 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
3201 return (server
->caps
& NFS_CAP_ACLS
)
3202 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
3203 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
3206 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3207 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3210 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3212 static void buf_to_pages(const void *buf
, size_t buflen
,
3213 struct page
**pages
, unsigned int *pgbase
)
3215 const void *p
= buf
;
3217 *pgbase
= offset_in_page(buf
);
3219 while (p
< buf
+ buflen
) {
3220 *(pages
++) = virt_to_page(p
);
3221 p
+= PAGE_CACHE_SIZE
;
3225 struct nfs4_cached_acl
{
3231 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
3233 struct nfs_inode
*nfsi
= NFS_I(inode
);
3235 spin_lock(&inode
->i_lock
);
3236 kfree(nfsi
->nfs4_acl
);
3237 nfsi
->nfs4_acl
= acl
;
3238 spin_unlock(&inode
->i_lock
);
3241 static void nfs4_zap_acl_attr(struct inode
*inode
)
3243 nfs4_set_cached_acl(inode
, NULL
);
3246 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
3248 struct nfs_inode
*nfsi
= NFS_I(inode
);
3249 struct nfs4_cached_acl
*acl
;
3252 spin_lock(&inode
->i_lock
);
3253 acl
= nfsi
->nfs4_acl
;
3256 if (buf
== NULL
) /* user is just asking for length */
3258 if (acl
->cached
== 0)
3260 ret
= -ERANGE
; /* see getxattr(2) man page */
3261 if (acl
->len
> buflen
)
3263 memcpy(buf
, acl
->data
, acl
->len
);
3267 spin_unlock(&inode
->i_lock
);
3271 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
3273 struct nfs4_cached_acl
*acl
;
3275 if (buf
&& acl_len
<= PAGE_SIZE
) {
3276 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
3280 memcpy(acl
->data
, buf
, acl_len
);
3282 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
3289 nfs4_set_cached_acl(inode
, acl
);
3292 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3294 struct page
*pages
[NFS4ACL_MAXPAGES
];
3295 struct nfs_getaclargs args
= {
3296 .fh
= NFS_FH(inode
),
3300 struct nfs_getaclres res
= {
3304 struct rpc_message msg
= {
3305 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
3309 struct page
*localpage
= NULL
;
3312 if (buflen
< PAGE_SIZE
) {
3313 /* As long as we're doing a round trip to the server anyway,
3314 * let's be prepared for a page of acl data. */
3315 localpage
= alloc_page(GFP_KERNEL
);
3316 resp_buf
= page_address(localpage
);
3317 if (localpage
== NULL
)
3319 args
.acl_pages
[0] = localpage
;
3320 args
.acl_pgbase
= 0;
3321 args
.acl_len
= PAGE_SIZE
;
3324 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
3326 ret
= nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
3329 if (res
.acl_len
> args
.acl_len
)
3330 nfs4_write_cached_acl(inode
, NULL
, res
.acl_len
);
3332 nfs4_write_cached_acl(inode
, resp_buf
, res
.acl_len
);
3335 if (res
.acl_len
> buflen
)
3338 memcpy(buf
, resp_buf
, res
.acl_len
);
3343 __free_page(localpage
);
3347 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3349 struct nfs4_exception exception
= { };
3352 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
3355 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
3356 } while (exception
.retry
);
3360 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
3362 struct nfs_server
*server
= NFS_SERVER(inode
);
3365 if (!nfs4_server_supports_acls(server
))
3367 ret
= nfs_revalidate_inode(server
, inode
);
3370 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
3373 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
3376 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3378 struct nfs_server
*server
= NFS_SERVER(inode
);
3379 struct page
*pages
[NFS4ACL_MAXPAGES
];
3380 struct nfs_setaclargs arg
= {
3381 .fh
= NFS_FH(inode
),
3385 struct nfs_setaclres res
;
3386 struct rpc_message msg
= {
3387 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
3393 if (!nfs4_server_supports_acls(server
))
3395 nfs_inode_return_delegation(inode
);
3396 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
3397 ret
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
3398 nfs_access_zap_cache(inode
);
3399 nfs_zap_acl_cache(inode
);
3403 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3405 struct nfs4_exception exception
= { };
3408 err
= nfs4_handle_exception(NFS_SERVER(inode
),
3409 __nfs4_proc_set_acl(inode
, buf
, buflen
),
3411 } while (exception
.retry
);
3416 _nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs_client
*clp
, struct nfs4_state
*state
)
3418 if (!clp
|| task
->tk_status
>= 0)
3420 switch(task
->tk_status
) {
3421 case -NFS4ERR_ADMIN_REVOKED
:
3422 case -NFS4ERR_BAD_STATEID
:
3423 case -NFS4ERR_OPENMODE
:
3426 nfs4_state_mark_reclaim_nograce(clp
, state
);
3427 case -NFS4ERR_STALE_CLIENTID
:
3428 case -NFS4ERR_STALE_STATEID
:
3429 case -NFS4ERR_EXPIRED
:
3430 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
);
3431 nfs4_schedule_state_recovery(clp
);
3432 if (test_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) == 0)
3433 rpc_wake_up_queued_task(&clp
->cl_rpcwaitq
, task
);
3434 task
->tk_status
= 0;
3436 #if defined(CONFIG_NFS_V4_1)
3437 case -NFS4ERR_BADSESSION
:
3438 case -NFS4ERR_BADSLOT
:
3439 case -NFS4ERR_BAD_HIGH_SLOT
:
3440 case -NFS4ERR_DEADSESSION
:
3441 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
3442 case -NFS4ERR_SEQ_FALSE_RETRY
:
3443 case -NFS4ERR_SEQ_MISORDERED
:
3444 dprintk("%s ERROR %d, Reset session\n", __func__
,
3446 nfs4_schedule_state_recovery(clp
);
3447 task
->tk_status
= 0;
3449 #endif /* CONFIG_NFS_V4_1 */
3450 case -NFS4ERR_DELAY
:
3452 nfs_inc_server_stats(server
, NFSIOS_DELAY
);
3453 case -NFS4ERR_GRACE
:
3454 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
3455 task
->tk_status
= 0;
3457 case -NFS4ERR_OLD_STATEID
:
3458 task
->tk_status
= 0;
3461 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
3466 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs4_state
*state
)
3468 return _nfs4_async_handle_error(task
, server
, server
->nfs_client
, state
);
3471 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
3473 nfs4_verifier sc_verifier
;
3474 struct nfs4_setclientid setclientid
= {
3475 .sc_verifier
= &sc_verifier
,
3478 struct rpc_message msg
= {
3479 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
3480 .rpc_argp
= &setclientid
,
3488 p
= (__be32
*)sc_verifier
.data
;
3489 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
3490 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
3493 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
3494 sizeof(setclientid
.sc_name
), "%s/%s %s %s %u",
3496 rpc_peeraddr2str(clp
->cl_rpcclient
,
3498 rpc_peeraddr2str(clp
->cl_rpcclient
,
3500 clp
->cl_rpcclient
->cl_auth
->au_ops
->au_name
,
3501 clp
->cl_id_uniquifier
);
3502 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
3503 sizeof(setclientid
.sc_netid
),
3504 rpc_peeraddr2str(clp
->cl_rpcclient
,
3505 RPC_DISPLAY_NETID
));
3506 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
3507 sizeof(setclientid
.sc_uaddr
), "%s.%u.%u",
3508 clp
->cl_ipaddr
, port
>> 8, port
& 255);
3510 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3511 if (status
!= -NFS4ERR_CLID_INUSE
)
3516 ssleep(clp
->cl_lease_time
+ 1);
3518 if (++clp
->cl_id_uniquifier
== 0)
3524 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3526 struct nfs_fsinfo fsinfo
;
3527 struct rpc_message msg
= {
3528 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
3530 .rpc_resp
= &fsinfo
,
3537 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3539 spin_lock(&clp
->cl_lock
);
3540 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
3541 clp
->cl_last_renewal
= now
;
3542 spin_unlock(&clp
->cl_lock
);
3547 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3552 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
3556 case -NFS4ERR_RESOURCE
:
3557 /* The IBM lawyers misread another document! */
3558 case -NFS4ERR_DELAY
:
3559 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
3565 struct nfs4_delegreturndata
{
3566 struct nfs4_delegreturnargs args
;
3567 struct nfs4_delegreturnres res
;
3569 nfs4_stateid stateid
;
3570 unsigned long timestamp
;
3571 struct nfs_fattr fattr
;
3575 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3577 struct nfs4_delegreturndata
*data
= calldata
;
3579 nfs4_sequence_done(data
->res
.server
, &data
->res
.seq_res
,
3582 switch (task
->tk_status
) {
3583 case -NFS4ERR_STALE_STATEID
:
3584 case -NFS4ERR_EXPIRED
:
3586 renew_lease(data
->res
.server
, data
->timestamp
);
3589 if (nfs4_async_handle_error(task
, data
->res
.server
, NULL
) ==
3591 nfs_restart_rpc(task
, data
->res
.server
->nfs_client
);
3595 data
->rpc_status
= task
->tk_status
;
3598 static void nfs4_delegreturn_release(void *calldata
)
3603 #if defined(CONFIG_NFS_V4_1)
3604 static void nfs4_delegreturn_prepare(struct rpc_task
*task
, void *data
)
3606 struct nfs4_delegreturndata
*d_data
;
3608 d_data
= (struct nfs4_delegreturndata
*)data
;
3610 if (nfs4_setup_sequence(d_data
->res
.server
->nfs_client
,
3611 &d_data
->args
.seq_args
,
3612 &d_data
->res
.seq_res
, 1, task
))
3614 rpc_call_start(task
);
3616 #endif /* CONFIG_NFS_V4_1 */
3618 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3619 #if defined(CONFIG_NFS_V4_1)
3620 .rpc_call_prepare
= nfs4_delegreturn_prepare
,
3621 #endif /* CONFIG_NFS_V4_1 */
3622 .rpc_call_done
= nfs4_delegreturn_done
,
3623 .rpc_release
= nfs4_delegreturn_release
,
3626 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3628 struct nfs4_delegreturndata
*data
;
3629 struct nfs_server
*server
= NFS_SERVER(inode
);
3630 struct rpc_task
*task
;
3631 struct rpc_message msg
= {
3632 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3635 struct rpc_task_setup task_setup_data
= {
3636 .rpc_client
= server
->client
,
3637 .rpc_message
= &msg
,
3638 .callback_ops
= &nfs4_delegreturn_ops
,
3639 .flags
= RPC_TASK_ASYNC
,
3643 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
3646 data
->args
.fhandle
= &data
->fh
;
3647 data
->args
.stateid
= &data
->stateid
;
3648 data
->args
.bitmask
= server
->attr_bitmask
;
3649 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3650 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3651 data
->res
.fattr
= &data
->fattr
;
3652 data
->res
.server
= server
;
3653 data
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3654 nfs_fattr_init(data
->res
.fattr
);
3655 data
->timestamp
= jiffies
;
3656 data
->rpc_status
= 0;
3658 task_setup_data
.callback_data
= data
;
3659 msg
.rpc_argp
= &data
->args
,
3660 msg
.rpc_resp
= &data
->res
,
3661 task
= rpc_run_task(&task_setup_data
);
3663 return PTR_ERR(task
);
3666 status
= nfs4_wait_for_completion_rpc_task(task
);
3669 status
= data
->rpc_status
;
3672 nfs_refresh_inode(inode
, &data
->fattr
);
3678 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3680 struct nfs_server
*server
= NFS_SERVER(inode
);
3681 struct nfs4_exception exception
= { };
3684 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
, issync
);
3686 case -NFS4ERR_STALE_STATEID
:
3687 case -NFS4ERR_EXPIRED
:
3691 err
= nfs4_handle_exception(server
, err
, &exception
);
3692 } while (exception
.retry
);
3696 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3697 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3700 * sleep, with exponential backoff, and retry the LOCK operation.
3702 static unsigned long
3703 nfs4_set_lock_task_retry(unsigned long timeout
)
3705 schedule_timeout_killable(timeout
);
3707 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3708 return NFS4_LOCK_MAXTIMEOUT
;
3712 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3714 struct inode
*inode
= state
->inode
;
3715 struct nfs_server
*server
= NFS_SERVER(inode
);
3716 struct nfs_client
*clp
= server
->nfs_client
;
3717 struct nfs_lockt_args arg
= {
3718 .fh
= NFS_FH(inode
),
3721 struct nfs_lockt_res res
= {
3724 struct rpc_message msg
= {
3725 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3728 .rpc_cred
= state
->owner
->so_cred
,
3730 struct nfs4_lock_state
*lsp
;
3733 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3734 status
= nfs4_set_lock_state(state
, request
);
3737 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3738 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3739 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
3742 request
->fl_type
= F_UNLCK
;
3744 case -NFS4ERR_DENIED
:
3747 request
->fl_ops
->fl_release_private(request
);
3752 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3754 struct nfs4_exception exception
= { };
3758 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3759 _nfs4_proc_getlk(state
, cmd
, request
),
3761 } while (exception
.retry
);
3765 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3768 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3770 res
= posix_lock_file_wait(file
, fl
);
3773 res
= flock_lock_file_wait(file
, fl
);
3781 struct nfs4_unlockdata
{
3782 struct nfs_locku_args arg
;
3783 struct nfs_locku_res res
;
3784 struct nfs4_lock_state
*lsp
;
3785 struct nfs_open_context
*ctx
;
3786 struct file_lock fl
;
3787 const struct nfs_server
*server
;
3788 unsigned long timestamp
;
3791 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3792 struct nfs_open_context
*ctx
,
3793 struct nfs4_lock_state
*lsp
,
3794 struct nfs_seqid
*seqid
)
3796 struct nfs4_unlockdata
*p
;
3797 struct inode
*inode
= lsp
->ls_state
->inode
;
3799 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3802 p
->arg
.fh
= NFS_FH(inode
);
3804 p
->arg
.seqid
= seqid
;
3805 p
->res
.seqid
= seqid
;
3806 p
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3807 p
->arg
.stateid
= &lsp
->ls_stateid
;
3809 atomic_inc(&lsp
->ls_count
);
3810 /* Ensure we don't close file until we're done freeing locks! */
3811 p
->ctx
= get_nfs_open_context(ctx
);
3812 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3813 p
->server
= NFS_SERVER(inode
);
3817 static void nfs4_locku_release_calldata(void *data
)
3819 struct nfs4_unlockdata
*calldata
= data
;
3820 nfs_free_seqid(calldata
->arg
.seqid
);
3821 nfs4_put_lock_state(calldata
->lsp
);
3822 put_nfs_open_context(calldata
->ctx
);
3826 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3828 struct nfs4_unlockdata
*calldata
= data
;
3830 nfs4_sequence_done(calldata
->server
, &calldata
->res
.seq_res
,
3832 if (RPC_ASSASSINATED(task
))
3834 switch (task
->tk_status
) {
3836 memcpy(calldata
->lsp
->ls_stateid
.data
,
3837 calldata
->res
.stateid
.data
,
3838 sizeof(calldata
->lsp
->ls_stateid
.data
));
3839 renew_lease(calldata
->server
, calldata
->timestamp
);
3841 case -NFS4ERR_BAD_STATEID
:
3842 case -NFS4ERR_OLD_STATEID
:
3843 case -NFS4ERR_STALE_STATEID
:
3844 case -NFS4ERR_EXPIRED
:
3847 if (nfs4_async_handle_error(task
, calldata
->server
, NULL
) == -EAGAIN
)
3848 nfs_restart_rpc(task
,
3849 calldata
->server
->nfs_client
);
3853 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3855 struct nfs4_unlockdata
*calldata
= data
;
3857 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3859 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3860 /* Note: exit _without_ running nfs4_locku_done */
3861 task
->tk_action
= NULL
;
3864 calldata
->timestamp
= jiffies
;
3865 if (nfs4_setup_sequence(calldata
->server
->nfs_client
,
3866 &calldata
->arg
.seq_args
,
3867 &calldata
->res
.seq_res
, 1, task
))
3869 rpc_call_start(task
);
3872 static const struct rpc_call_ops nfs4_locku_ops
= {
3873 .rpc_call_prepare
= nfs4_locku_prepare
,
3874 .rpc_call_done
= nfs4_locku_done
,
3875 .rpc_release
= nfs4_locku_release_calldata
,
3878 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3879 struct nfs_open_context
*ctx
,
3880 struct nfs4_lock_state
*lsp
,
3881 struct nfs_seqid
*seqid
)
3883 struct nfs4_unlockdata
*data
;
3884 struct rpc_message msg
= {
3885 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3886 .rpc_cred
= ctx
->cred
,
3888 struct rpc_task_setup task_setup_data
= {
3889 .rpc_client
= NFS_CLIENT(lsp
->ls_state
->inode
),
3890 .rpc_message
= &msg
,
3891 .callback_ops
= &nfs4_locku_ops
,
3892 .workqueue
= nfsiod_workqueue
,
3893 .flags
= RPC_TASK_ASYNC
,
3896 /* Ensure this is an unlock - when canceling a lock, the
3897 * canceled lock is passed in, and it won't be an unlock.
3899 fl
->fl_type
= F_UNLCK
;
3901 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3903 nfs_free_seqid(seqid
);
3904 return ERR_PTR(-ENOMEM
);
3907 msg
.rpc_argp
= &data
->arg
,
3908 msg
.rpc_resp
= &data
->res
,
3909 task_setup_data
.callback_data
= data
;
3910 return rpc_run_task(&task_setup_data
);
3913 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3915 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3916 struct nfs_seqid
*seqid
;
3917 struct nfs4_lock_state
*lsp
;
3918 struct rpc_task
*task
;
3920 unsigned char fl_flags
= request
->fl_flags
;
3922 status
= nfs4_set_lock_state(state
, request
);
3923 /* Unlock _before_ we do the RPC call */
3924 request
->fl_flags
|= FL_EXISTS
;
3925 down_read(&nfsi
->rwsem
);
3926 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
) {
3927 up_read(&nfsi
->rwsem
);
3930 up_read(&nfsi
->rwsem
);
3933 /* Is this a delegated lock? */
3934 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3936 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3937 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3941 task
= nfs4_do_unlck(request
, nfs_file_open_context(request
->fl_file
), lsp
, seqid
);
3942 status
= PTR_ERR(task
);
3945 status
= nfs4_wait_for_completion_rpc_task(task
);
3948 request
->fl_flags
= fl_flags
;
3952 struct nfs4_lockdata
{
3953 struct nfs_lock_args arg
;
3954 struct nfs_lock_res res
;
3955 struct nfs4_lock_state
*lsp
;
3956 struct nfs_open_context
*ctx
;
3957 struct file_lock fl
;
3958 unsigned long timestamp
;
3961 struct nfs_server
*server
;
3964 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
3965 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
3967 struct nfs4_lockdata
*p
;
3968 struct inode
*inode
= lsp
->ls_state
->inode
;
3969 struct nfs_server
*server
= NFS_SERVER(inode
);
3971 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3975 p
->arg
.fh
= NFS_FH(inode
);
3977 p
->arg
.open_seqid
= nfs_alloc_seqid(&lsp
->ls_state
->owner
->so_seqid
);
3978 if (p
->arg
.open_seqid
== NULL
)
3980 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3981 if (p
->arg
.lock_seqid
== NULL
)
3982 goto out_free_seqid
;
3983 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
3984 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
3985 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3986 p
->res
.lock_seqid
= p
->arg
.lock_seqid
;
3987 p
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3990 atomic_inc(&lsp
->ls_count
);
3991 p
->ctx
= get_nfs_open_context(ctx
);
3992 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3995 nfs_free_seqid(p
->arg
.open_seqid
);
4001 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
4003 struct nfs4_lockdata
*data
= calldata
;
4004 struct nfs4_state
*state
= data
->lsp
->ls_state
;
4006 dprintk("%s: begin!\n", __func__
);
4007 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
4009 /* Do we need to do an open_to_lock_owner? */
4010 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
4011 if (nfs_wait_on_sequence(data
->arg
.open_seqid
, task
) != 0)
4013 data
->arg
.open_stateid
= &state
->stateid
;
4014 data
->arg
.new_lock_owner
= 1;
4015 data
->res
.open_seqid
= data
->arg
.open_seqid
;
4017 data
->arg
.new_lock_owner
= 0;
4018 data
->timestamp
= jiffies
;
4019 if (nfs4_setup_sequence(data
->server
->nfs_client
, &data
->arg
.seq_args
,
4020 &data
->res
.seq_res
, 1, task
))
4022 rpc_call_start(task
);
4023 dprintk("%s: done!, ret = %d\n", __func__
, data
->rpc_status
);
4026 static void nfs4_recover_lock_prepare(struct rpc_task
*task
, void *calldata
)
4028 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
4029 nfs4_lock_prepare(task
, calldata
);
4032 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
4034 struct nfs4_lockdata
*data
= calldata
;
4036 dprintk("%s: begin!\n", __func__
);
4038 nfs4_sequence_done(data
->server
, &data
->res
.seq_res
,
4041 data
->rpc_status
= task
->tk_status
;
4042 if (RPC_ASSASSINATED(task
))
4044 if (data
->arg
.new_lock_owner
!= 0) {
4045 if (data
->rpc_status
== 0)
4046 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
4050 if (data
->rpc_status
== 0) {
4051 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
4052 sizeof(data
->lsp
->ls_stateid
.data
));
4053 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
4054 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
4057 dprintk("%s: done, ret = %d!\n", __func__
, data
->rpc_status
);
4060 static void nfs4_lock_release(void *calldata
)
4062 struct nfs4_lockdata
*data
= calldata
;
4064 dprintk("%s: begin!\n", __func__
);
4065 nfs_free_seqid(data
->arg
.open_seqid
);
4066 if (data
->cancelled
!= 0) {
4067 struct rpc_task
*task
;
4068 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
4069 data
->arg
.lock_seqid
);
4072 dprintk("%s: cancelling lock!\n", __func__
);
4074 nfs_free_seqid(data
->arg
.lock_seqid
);
4075 nfs4_put_lock_state(data
->lsp
);
4076 put_nfs_open_context(data
->ctx
);
4078 dprintk("%s: done!\n", __func__
);
4081 static const struct rpc_call_ops nfs4_lock_ops
= {
4082 .rpc_call_prepare
= nfs4_lock_prepare
,
4083 .rpc_call_done
= nfs4_lock_done
,
4084 .rpc_release
= nfs4_lock_release
,
4087 static const struct rpc_call_ops nfs4_recover_lock_ops
= {
4088 .rpc_call_prepare
= nfs4_recover_lock_prepare
,
4089 .rpc_call_done
= nfs4_lock_done
,
4090 .rpc_release
= nfs4_lock_release
,
4093 static void nfs4_handle_setlk_error(struct nfs_server
*server
, struct nfs4_lock_state
*lsp
, int new_lock_owner
, int error
)
4095 struct nfs_client
*clp
= server
->nfs_client
;
4096 struct nfs4_state
*state
= lsp
->ls_state
;
4099 case -NFS4ERR_ADMIN_REVOKED
:
4100 case -NFS4ERR_BAD_STATEID
:
4101 case -NFS4ERR_EXPIRED
:
4102 if (new_lock_owner
!= 0 ||
4103 (lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) != 0)
4104 nfs4_state_mark_reclaim_nograce(clp
, state
);
4105 lsp
->ls_seqid
.flags
&= ~NFS_SEQID_CONFIRMED
;
4109 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int recovery_type
)
4111 struct nfs4_lockdata
*data
;
4112 struct rpc_task
*task
;
4113 struct rpc_message msg
= {
4114 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
4115 .rpc_cred
= state
->owner
->so_cred
,
4117 struct rpc_task_setup task_setup_data
= {
4118 .rpc_client
= NFS_CLIENT(state
->inode
),
4119 .rpc_message
= &msg
,
4120 .callback_ops
= &nfs4_lock_ops
,
4121 .workqueue
= nfsiod_workqueue
,
4122 .flags
= RPC_TASK_ASYNC
,
4126 dprintk("%s: begin!\n", __func__
);
4127 data
= nfs4_alloc_lockdata(fl
, nfs_file_open_context(fl
->fl_file
),
4128 fl
->fl_u
.nfs4_fl
.owner
);
4132 data
->arg
.block
= 1;
4133 if (recovery_type
> NFS_LOCK_NEW
) {
4134 if (recovery_type
== NFS_LOCK_RECLAIM
)
4135 data
->arg
.reclaim
= NFS_LOCK_RECLAIM
;
4136 task_setup_data
.callback_ops
= &nfs4_recover_lock_ops
;
4138 msg
.rpc_argp
= &data
->arg
,
4139 msg
.rpc_resp
= &data
->res
,
4140 task_setup_data
.callback_data
= data
;
4141 task
= rpc_run_task(&task_setup_data
);
4143 return PTR_ERR(task
);
4144 ret
= nfs4_wait_for_completion_rpc_task(task
);
4146 ret
= data
->rpc_status
;
4148 nfs4_handle_setlk_error(data
->server
, data
->lsp
,
4149 data
->arg
.new_lock_owner
, ret
);
4151 data
->cancelled
= 1;
4153 dprintk("%s: done, ret = %d!\n", __func__
, ret
);
4157 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
4159 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4160 struct nfs4_exception exception
= { };
4164 /* Cache the lock if possible... */
4165 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
4167 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, NFS_LOCK_RECLAIM
);
4168 if (err
!= -NFS4ERR_DELAY
)
4170 nfs4_handle_exception(server
, err
, &exception
);
4171 } while (exception
.retry
);
4175 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
4177 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4178 struct nfs4_exception exception
= { };
4181 err
= nfs4_set_lock_state(state
, request
);
4185 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
4187 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, NFS_LOCK_EXPIRED
);
4191 case -NFS4ERR_GRACE
:
4192 case -NFS4ERR_DELAY
:
4193 nfs4_handle_exception(server
, err
, &exception
);
4196 } while (exception
.retry
);
4201 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4203 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
4204 unsigned char fl_flags
= request
->fl_flags
;
4205 int status
= -ENOLCK
;
4207 if ((fl_flags
& FL_POSIX
) &&
4208 !test_bit(NFS_STATE_POSIX_LOCKS
, &state
->flags
))
4210 /* Is this a delegated open? */
4211 status
= nfs4_set_lock_state(state
, request
);
4214 request
->fl_flags
|= FL_ACCESS
;
4215 status
= do_vfs_lock(request
->fl_file
, request
);
4218 down_read(&nfsi
->rwsem
);
4219 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
4220 /* Yes: cache locks! */
4221 /* ...but avoid races with delegation recall... */
4222 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
4223 status
= do_vfs_lock(request
->fl_file
, request
);
4226 status
= _nfs4_do_setlk(state
, cmd
, request
, NFS_LOCK_NEW
);
4229 /* Note: we always want to sleep here! */
4230 request
->fl_flags
= fl_flags
| FL_SLEEP
;
4231 if (do_vfs_lock(request
->fl_file
, request
) < 0)
4232 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __func__
);
4234 up_read(&nfsi
->rwsem
);
4236 request
->fl_flags
= fl_flags
;
4240 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4242 struct nfs4_exception exception
= { };
4246 err
= _nfs4_proc_setlk(state
, cmd
, request
);
4247 if (err
== -NFS4ERR_DENIED
)
4249 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
4251 } while (exception
.retry
);
4256 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
4258 struct nfs_open_context
*ctx
;
4259 struct nfs4_state
*state
;
4260 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
4263 /* verify open state */
4264 ctx
= nfs_file_open_context(filp
);
4267 if (request
->fl_start
< 0 || request
->fl_end
< 0)
4270 if (IS_GETLK(cmd
)) {
4272 return nfs4_proc_getlk(state
, F_GETLK
, request
);
4276 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
4279 if (request
->fl_type
== F_UNLCK
) {
4281 return nfs4_proc_unlck(state
, cmd
, request
);
4288 status
= nfs4_proc_setlk(state
, cmd
, request
);
4289 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
4291 timeout
= nfs4_set_lock_task_retry(timeout
);
4292 status
= -ERESTARTSYS
;
4295 } while(status
< 0);
4299 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
4301 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4302 struct nfs4_exception exception
= { };
4305 err
= nfs4_set_lock_state(state
, fl
);
4309 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, NFS_LOCK_NEW
);
4312 printk(KERN_ERR
"%s: unhandled error %d.\n",
4317 case -NFS4ERR_EXPIRED
:
4318 case -NFS4ERR_STALE_CLIENTID
:
4319 case -NFS4ERR_STALE_STATEID
:
4320 case -NFS4ERR_BADSESSION
:
4321 case -NFS4ERR_BADSLOT
:
4322 case -NFS4ERR_BAD_HIGH_SLOT
:
4323 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
4324 case -NFS4ERR_DEADSESSION
:
4325 nfs4_schedule_state_recovery(server
->nfs_client
);
4329 * The show must go on: exit, but mark the
4330 * stateid as needing recovery.
4332 case -NFS4ERR_ADMIN_REVOKED
:
4333 case -NFS4ERR_BAD_STATEID
:
4334 case -NFS4ERR_OPENMODE
:
4335 nfs4_state_mark_reclaim_nograce(server
->nfs_client
, state
);
4339 case -NFS4ERR_DENIED
:
4340 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4343 case -NFS4ERR_DELAY
:
4346 err
= nfs4_handle_exception(server
, err
, &exception
);
4347 } while (exception
.retry
);
4352 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4354 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
4355 size_t buflen
, int flags
)
4357 struct inode
*inode
= dentry
->d_inode
;
4359 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
4362 return nfs4_proc_set_acl(inode
, buf
, buflen
);
4365 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4366 * and that's what we'll do for e.g. user attributes that haven't been set.
4367 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4368 * attributes in kernel-managed attribute namespaces. */
4369 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
4372 struct inode
*inode
= dentry
->d_inode
;
4374 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
4377 return nfs4_proc_get_acl(inode
, buf
, buflen
);
4380 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
4382 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
4384 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
4386 if (buf
&& buflen
< len
)
4389 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
4393 static void nfs_fixup_referral_attributes(struct nfs_fattr
*fattr
)
4395 if (!((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) &&
4396 (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
4397 (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)))
4400 fattr
->valid
|= NFS_ATTR_FATTR_TYPE
| NFS_ATTR_FATTR_MODE
|
4401 NFS_ATTR_FATTR_NLINK
;
4402 fattr
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
4406 int nfs4_proc_fs_locations(struct inode
*dir
, const struct qstr
*name
,
4407 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
4409 struct nfs_server
*server
= NFS_SERVER(dir
);
4411 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
4412 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
4414 struct nfs4_fs_locations_arg args
= {
4415 .dir_fh
= NFS_FH(dir
),
4420 struct nfs4_fs_locations_res res
= {
4421 .fs_locations
= fs_locations
,
4423 struct rpc_message msg
= {
4424 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
4430 dprintk("%s: start\n", __func__
);
4431 nfs_fattr_init(&fs_locations
->fattr
);
4432 fs_locations
->server
= server
;
4433 fs_locations
->nlocations
= 0;
4434 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
4435 nfs_fixup_referral_attributes(&fs_locations
->fattr
);
4436 dprintk("%s: returned status = %d\n", __func__
, status
);
4440 #ifdef CONFIG_NFS_V4_1
4442 * nfs4_proc_exchange_id()
4444 * Since the clientid has expired, all compounds using sessions
4445 * associated with the stale clientid will be returning
4446 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4447 * be in some phase of session reset.
4449 int nfs4_proc_exchange_id(struct nfs_client
*clp
, struct rpc_cred
*cred
)
4451 nfs4_verifier verifier
;
4452 struct nfs41_exchange_id_args args
= {
4454 .flags
= clp
->cl_exchange_flags
,
4456 struct nfs41_exchange_id_res res
= {
4460 struct rpc_message msg
= {
4461 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_EXCHANGE_ID
],
4468 dprintk("--> %s\n", __func__
);
4469 BUG_ON(clp
== NULL
);
4471 /* Remove server-only flags */
4472 args
.flags
&= ~EXCHGID4_FLAG_CONFIRMED_R
;
4474 p
= (u32
*)verifier
.data
;
4475 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
4476 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
4477 args
.verifier
= &verifier
;
4480 args
.id_len
= scnprintf(args
.id
, sizeof(args
.id
),
4483 rpc_peeraddr2str(clp
->cl_rpcclient
,
4485 clp
->cl_id_uniquifier
);
4487 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
4489 if (status
!= NFS4ERR_CLID_INUSE
)
4495 if (++clp
->cl_id_uniquifier
== 0)
4499 dprintk("<-- %s status= %d\n", __func__
, status
);
4503 struct nfs4_get_lease_time_data
{
4504 struct nfs4_get_lease_time_args
*args
;
4505 struct nfs4_get_lease_time_res
*res
;
4506 struct nfs_client
*clp
;
4509 static void nfs4_get_lease_time_prepare(struct rpc_task
*task
,
4513 struct nfs4_get_lease_time_data
*data
=
4514 (struct nfs4_get_lease_time_data
*)calldata
;
4516 dprintk("--> %s\n", __func__
);
4517 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
4518 /* just setup sequence, do not trigger session recovery
4519 since we're invoked within one */
4520 ret
= nfs41_setup_sequence(data
->clp
->cl_session
,
4521 &data
->args
->la_seq_args
,
4522 &data
->res
->lr_seq_res
, 0, task
);
4524 BUG_ON(ret
== -EAGAIN
);
4525 rpc_call_start(task
);
4526 dprintk("<-- %s\n", __func__
);
4530 * Called from nfs4_state_manager thread for session setup, so don't recover
4531 * from sequence operation or clientid errors.
4533 static void nfs4_get_lease_time_done(struct rpc_task
*task
, void *calldata
)
4535 struct nfs4_get_lease_time_data
*data
=
4536 (struct nfs4_get_lease_time_data
*)calldata
;
4538 dprintk("--> %s\n", __func__
);
4539 nfs41_sequence_done(data
->clp
, &data
->res
->lr_seq_res
, task
->tk_status
);
4540 switch (task
->tk_status
) {
4541 case -NFS4ERR_DELAY
:
4542 case -NFS4ERR_GRACE
:
4543 dprintk("%s Retry: tk_status %d\n", __func__
, task
->tk_status
);
4544 rpc_delay(task
, NFS4_POLL_RETRY_MIN
);
4545 task
->tk_status
= 0;
4546 nfs_restart_rpc(task
, data
->clp
);
4549 dprintk("<-- %s\n", __func__
);
4552 struct rpc_call_ops nfs4_get_lease_time_ops
= {
4553 .rpc_call_prepare
= nfs4_get_lease_time_prepare
,
4554 .rpc_call_done
= nfs4_get_lease_time_done
,
4557 int nfs4_proc_get_lease_time(struct nfs_client
*clp
, struct nfs_fsinfo
*fsinfo
)
4559 struct rpc_task
*task
;
4560 struct nfs4_get_lease_time_args args
;
4561 struct nfs4_get_lease_time_res res
= {
4562 .lr_fsinfo
= fsinfo
,
4564 struct nfs4_get_lease_time_data data
= {
4569 struct rpc_message msg
= {
4570 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GET_LEASE_TIME
],
4574 struct rpc_task_setup task_setup
= {
4575 .rpc_client
= clp
->cl_rpcclient
,
4576 .rpc_message
= &msg
,
4577 .callback_ops
= &nfs4_get_lease_time_ops
,
4578 .callback_data
= &data
4582 res
.lr_seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
4583 dprintk("--> %s\n", __func__
);
4584 task
= rpc_run_task(&task_setup
);
4587 status
= PTR_ERR(task
);
4589 status
= task
->tk_status
;
4592 dprintk("<-- %s return %d\n", __func__
, status
);
4598 * Reset a slot table
4600 static int nfs4_reset_slot_table(struct nfs4_slot_table
*tbl
, int max_slots
,
4601 int old_max_slots
, int ivalue
)
4606 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__
, max_slots
, tbl
);
4609 * Until we have dynamic slot table adjustment, insist
4610 * upon the same slot table size
4612 if (max_slots
!= old_max_slots
) {
4613 dprintk("%s reset slot table does't match old\n",
4615 ret
= -EINVAL
; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4618 spin_lock(&tbl
->slot_tbl_lock
);
4619 for (i
= 0; i
< max_slots
; ++i
)
4620 tbl
->slots
[i
].seq_nr
= ivalue
;
4621 spin_unlock(&tbl
->slot_tbl_lock
);
4622 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__
,
4623 tbl
, tbl
->slots
, tbl
->max_slots
);
4625 dprintk("<-- %s: return %d\n", __func__
, ret
);
4630 * Reset the forechannel and backchannel slot tables
4632 static int nfs4_reset_slot_tables(struct nfs4_session
*session
)
4636 status
= nfs4_reset_slot_table(&session
->fc_slot_table
,
4637 session
->fc_attrs
.max_reqs
,
4638 session
->fc_slot_table
.max_slots
,
4643 status
= nfs4_reset_slot_table(&session
->bc_slot_table
,
4644 session
->bc_attrs
.max_reqs
,
4645 session
->bc_slot_table
.max_slots
,
4650 /* Destroy the slot table */
4651 static void nfs4_destroy_slot_tables(struct nfs4_session
*session
)
4653 if (session
->fc_slot_table
.slots
!= NULL
) {
4654 kfree(session
->fc_slot_table
.slots
);
4655 session
->fc_slot_table
.slots
= NULL
;
4657 if (session
->bc_slot_table
.slots
!= NULL
) {
4658 kfree(session
->bc_slot_table
.slots
);
4659 session
->bc_slot_table
.slots
= NULL
;
4665 * Initialize slot table
4667 static int nfs4_init_slot_table(struct nfs4_slot_table
*tbl
,
4668 int max_slots
, int ivalue
)
4670 struct nfs4_slot
*slot
;
4673 BUG_ON(max_slots
> NFS4_MAX_SLOT_TABLE
);
4675 dprintk("--> %s: max_reqs=%u\n", __func__
, max_slots
);
4677 slot
= kcalloc(max_slots
, sizeof(struct nfs4_slot
), GFP_KERNEL
);
4682 spin_lock(&tbl
->slot_tbl_lock
);
4683 tbl
->max_slots
= max_slots
;
4685 tbl
->highest_used_slotid
= -1; /* no slot is currently used */
4686 spin_unlock(&tbl
->slot_tbl_lock
);
4687 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__
,
4688 tbl
, tbl
->slots
, tbl
->max_slots
);
4690 dprintk("<-- %s: return %d\n", __func__
, ret
);
4695 * Initialize the forechannel and backchannel tables
4697 static int nfs4_init_slot_tables(struct nfs4_session
*session
)
4699 struct nfs4_slot_table
*tbl
;
4702 tbl
= &session
->fc_slot_table
;
4703 if (tbl
->slots
== NULL
) {
4704 status
= nfs4_init_slot_table(tbl
,
4705 session
->fc_attrs
.max_reqs
, 1);
4710 tbl
= &session
->bc_slot_table
;
4711 if (tbl
->slots
== NULL
) {
4712 status
= nfs4_init_slot_table(tbl
,
4713 session
->bc_attrs
.max_reqs
, 0);
4715 nfs4_destroy_slot_tables(session
);
4721 struct nfs4_session
*nfs4_alloc_session(struct nfs_client
*clp
)
4723 struct nfs4_session
*session
;
4724 struct nfs4_slot_table
*tbl
;
4726 session
= kzalloc(sizeof(struct nfs4_session
), GFP_KERNEL
);
4731 * The create session reply races with the server back
4732 * channel probe. Mark the client NFS_CS_SESSION_INITING
4733 * so that the client back channel can find the
4736 clp
->cl_cons_state
= NFS_CS_SESSION_INITING
;
4737 init_completion(&session
->complete
);
4739 tbl
= &session
->fc_slot_table
;
4740 tbl
->highest_used_slotid
= -1;
4741 spin_lock_init(&tbl
->slot_tbl_lock
);
4742 rpc_init_priority_wait_queue(&tbl
->slot_tbl_waitq
, "ForeChannel Slot table");
4744 tbl
= &session
->bc_slot_table
;
4745 tbl
->highest_used_slotid
= -1;
4746 spin_lock_init(&tbl
->slot_tbl_lock
);
4747 rpc_init_wait_queue(&tbl
->slot_tbl_waitq
, "BackChannel Slot table");
4753 void nfs4_destroy_session(struct nfs4_session
*session
)
4755 nfs4_proc_destroy_session(session
);
4756 dprintk("%s Destroy backchannel for xprt %p\n",
4757 __func__
, session
->clp
->cl_rpcclient
->cl_xprt
);
4758 xprt_destroy_backchannel(session
->clp
->cl_rpcclient
->cl_xprt
,
4759 NFS41_BC_MIN_CALLBACKS
);
4760 nfs4_destroy_slot_tables(session
);
4765 * Initialize the values to be used by the client in CREATE_SESSION
4766 * If nfs4_init_session set the fore channel request and response sizes,
4769 * Set the back channel max_resp_sz_cached to zero to force the client to
4770 * always set csa_cachethis to FALSE because the current implementation
4771 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4773 static void nfs4_init_channel_attrs(struct nfs41_create_session_args
*args
)
4775 struct nfs4_session
*session
= args
->client
->cl_session
;
4776 unsigned int mxrqst_sz
= session
->fc_attrs
.max_rqst_sz
,
4777 mxresp_sz
= session
->fc_attrs
.max_resp_sz
;
4780 mxrqst_sz
= NFS_MAX_FILE_IO_SIZE
;
4782 mxresp_sz
= NFS_MAX_FILE_IO_SIZE
;
4783 /* Fore channel attributes */
4784 args
->fc_attrs
.headerpadsz
= 0;
4785 args
->fc_attrs
.max_rqst_sz
= mxrqst_sz
;
4786 args
->fc_attrs
.max_resp_sz
= mxresp_sz
;
4787 args
->fc_attrs
.max_resp_sz_cached
= mxresp_sz
;
4788 args
->fc_attrs
.max_ops
= NFS4_MAX_OPS
;
4789 args
->fc_attrs
.max_reqs
= session
->clp
->cl_rpcclient
->cl_xprt
->max_reqs
;
4791 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4792 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4794 args
->fc_attrs
.max_rqst_sz
, args
->fc_attrs
.max_resp_sz
,
4795 args
->fc_attrs
.max_resp_sz_cached
, args
->fc_attrs
.max_ops
,
4796 args
->fc_attrs
.max_reqs
);
4798 /* Back channel attributes */
4799 args
->bc_attrs
.headerpadsz
= 0;
4800 args
->bc_attrs
.max_rqst_sz
= PAGE_SIZE
;
4801 args
->bc_attrs
.max_resp_sz
= PAGE_SIZE
;
4802 args
->bc_attrs
.max_resp_sz_cached
= 0;
4803 args
->bc_attrs
.max_ops
= NFS4_MAX_BACK_CHANNEL_OPS
;
4804 args
->bc_attrs
.max_reqs
= 1;
4806 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4807 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4809 args
->bc_attrs
.max_rqst_sz
, args
->bc_attrs
.max_resp_sz
,
4810 args
->bc_attrs
.max_resp_sz_cached
, args
->bc_attrs
.max_ops
,
4811 args
->bc_attrs
.max_reqs
);
4814 static int _verify_channel_attr(char *chan
, char *attr_name
, u32 sent
, u32 rcvd
)
4818 printk(KERN_WARNING
"%s: Session INVALID: %s channel %s increased. "
4819 "sent=%u rcvd=%u\n", __func__
, chan
, attr_name
, sent
, rcvd
);
4823 #define _verify_fore_channel_attr(_name_) \
4824 _verify_channel_attr("fore", #_name_, \
4825 args->fc_attrs._name_, \
4826 session->fc_attrs._name_)
4828 #define _verify_back_channel_attr(_name_) \
4829 _verify_channel_attr("back", #_name_, \
4830 args->bc_attrs._name_, \
4831 session->bc_attrs._name_)
4834 * The server is not allowed to increase the fore channel header pad size,
4835 * maximum response size, or maximum number of operations.
4837 * The back channel attributes are only negotiatied down: We send what the
4838 * (back channel) server insists upon.
4840 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args
*args
,
4841 struct nfs4_session
*session
)
4845 ret
|= _verify_fore_channel_attr(headerpadsz
);
4846 ret
|= _verify_fore_channel_attr(max_resp_sz
);
4847 ret
|= _verify_fore_channel_attr(max_ops
);
4849 ret
|= _verify_back_channel_attr(headerpadsz
);
4850 ret
|= _verify_back_channel_attr(max_rqst_sz
);
4851 ret
|= _verify_back_channel_attr(max_resp_sz
);
4852 ret
|= _verify_back_channel_attr(max_resp_sz_cached
);
4853 ret
|= _verify_back_channel_attr(max_ops
);
4854 ret
|= _verify_back_channel_attr(max_reqs
);
4859 static int _nfs4_proc_create_session(struct nfs_client
*clp
)
4861 struct nfs4_session
*session
= clp
->cl_session
;
4862 struct nfs41_create_session_args args
= {
4864 .cb_program
= NFS4_CALLBACK
,
4866 struct nfs41_create_session_res res
= {
4869 struct rpc_message msg
= {
4870 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE_SESSION
],
4876 nfs4_init_channel_attrs(&args
);
4877 args
.flags
= (SESSION4_PERSIST
| SESSION4_BACK_CHAN
);
4879 status
= rpc_call_sync(session
->clp
->cl_rpcclient
, &msg
, 0);
4882 /* Verify the session's negotiated channel_attrs values */
4883 status
= nfs4_verify_channel_attrs(&args
, session
);
4885 /* Increment the clientid slot sequence id */
4893 * Issues a CREATE_SESSION operation to the server.
4894 * It is the responsibility of the caller to verify the session is
4895 * expired before calling this routine.
4897 int nfs4_proc_create_session(struct nfs_client
*clp
)
4901 struct nfs4_session
*session
= clp
->cl_session
;
4903 dprintk("--> %s clp=%p session=%p\n", __func__
, clp
, session
);
4905 status
= _nfs4_proc_create_session(clp
);
4909 /* Init and reset the fore channel */
4910 status
= nfs4_init_slot_tables(session
);
4911 dprintk("slot table initialization returned %d\n", status
);
4914 status
= nfs4_reset_slot_tables(session
);
4915 dprintk("slot table reset returned %d\n", status
);
4919 ptr
= (unsigned *)&session
->sess_id
.data
[0];
4920 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__
,
4921 clp
->cl_seqid
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
4923 dprintk("<-- %s\n", __func__
);
4928 * Issue the over-the-wire RPC DESTROY_SESSION.
4929 * The caller must serialize access to this routine.
4931 int nfs4_proc_destroy_session(struct nfs4_session
*session
)
4934 struct rpc_message msg
;
4936 dprintk("--> nfs4_proc_destroy_session\n");
4938 /* session is still being setup */
4939 if (session
->clp
->cl_cons_state
!= NFS_CS_READY
)
4942 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DESTROY_SESSION
];
4943 msg
.rpc_argp
= session
;
4944 msg
.rpc_resp
= NULL
;
4945 msg
.rpc_cred
= NULL
;
4946 status
= rpc_call_sync(session
->clp
->cl_rpcclient
, &msg
, 0);
4950 "Got error %d from the server on DESTROY_SESSION. "
4951 "Session has been destroyed regardless...\n", status
);
4953 dprintk("<-- nfs4_proc_destroy_session\n");
4957 int nfs4_init_session(struct nfs_server
*server
)
4959 struct nfs_client
*clp
= server
->nfs_client
;
4960 struct nfs4_session
*session
;
4961 unsigned int rsize
, wsize
;
4964 if (!nfs4_has_session(clp
))
4967 rsize
= server
->rsize
;
4969 rsize
= NFS_MAX_FILE_IO_SIZE
;
4970 wsize
= server
->wsize
;
4972 wsize
= NFS_MAX_FILE_IO_SIZE
;
4974 session
= clp
->cl_session
;
4975 session
->fc_attrs
.max_rqst_sz
= wsize
+ nfs41_maxwrite_overhead
;
4976 session
->fc_attrs
.max_resp_sz
= rsize
+ nfs41_maxread_overhead
;
4978 ret
= nfs4_recover_expired_lease(server
);
4980 ret
= nfs4_check_client_ready(clp
);
4985 * Renew the cl_session lease.
4987 static int nfs4_proc_sequence(struct nfs_client
*clp
, struct rpc_cred
*cred
)
4989 struct nfs4_sequence_args args
;
4990 struct nfs4_sequence_res res
;
4992 struct rpc_message msg
= {
4993 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SEQUENCE
],
4999 args
.sa_cache_this
= 0;
5001 return nfs4_call_sync_sequence(clp
, clp
->cl_rpcclient
, &msg
, &args
,
5002 &res
, args
.sa_cache_this
, 1);
5005 void nfs41_sequence_call_done(struct rpc_task
*task
, void *data
)
5007 struct nfs_client
*clp
= (struct nfs_client
*)data
;
5009 nfs41_sequence_done(clp
, task
->tk_msg
.rpc_resp
, task
->tk_status
);
5011 if (task
->tk_status
< 0) {
5012 dprintk("%s ERROR %d\n", __func__
, task
->tk_status
);
5014 if (_nfs4_async_handle_error(task
, NULL
, clp
, NULL
)
5016 nfs_restart_rpc(task
, clp
);
5020 dprintk("%s rpc_cred %p\n", __func__
, task
->tk_msg
.rpc_cred
);
5022 kfree(task
->tk_msg
.rpc_argp
);
5023 kfree(task
->tk_msg
.rpc_resp
);
5025 dprintk("<-- %s\n", __func__
);
5028 static void nfs41_sequence_prepare(struct rpc_task
*task
, void *data
)
5030 struct nfs_client
*clp
;
5031 struct nfs4_sequence_args
*args
;
5032 struct nfs4_sequence_res
*res
;
5034 clp
= (struct nfs_client
*)data
;
5035 args
= task
->tk_msg
.rpc_argp
;
5036 res
= task
->tk_msg
.rpc_resp
;
5038 if (nfs4_setup_sequence(clp
, args
, res
, 0, task
))
5040 rpc_call_start(task
);
5043 static const struct rpc_call_ops nfs41_sequence_ops
= {
5044 .rpc_call_done
= nfs41_sequence_call_done
,
5045 .rpc_call_prepare
= nfs41_sequence_prepare
,
5048 static int nfs41_proc_async_sequence(struct nfs_client
*clp
,
5049 struct rpc_cred
*cred
)
5051 struct nfs4_sequence_args
*args
;
5052 struct nfs4_sequence_res
*res
;
5053 struct rpc_message msg
= {
5054 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SEQUENCE
],
5058 args
= kzalloc(sizeof(*args
), GFP_KERNEL
);
5061 res
= kzalloc(sizeof(*res
), GFP_KERNEL
);
5066 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
5067 msg
.rpc_argp
= args
;
5070 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
5071 &nfs41_sequence_ops
, (void *)clp
);
5074 struct nfs4_reclaim_complete_data
{
5075 struct nfs_client
*clp
;
5076 struct nfs41_reclaim_complete_args arg
;
5077 struct nfs41_reclaim_complete_res res
;
5080 static void nfs4_reclaim_complete_prepare(struct rpc_task
*task
, void *data
)
5082 struct nfs4_reclaim_complete_data
*calldata
= data
;
5084 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
5085 if (nfs4_setup_sequence(calldata
->clp
, &calldata
->arg
.seq_args
,
5086 &calldata
->res
.seq_res
, 0, task
))
5089 rpc_call_start(task
);
5092 static void nfs4_reclaim_complete_done(struct rpc_task
*task
, void *data
)
5094 struct nfs4_reclaim_complete_data
*calldata
= data
;
5095 struct nfs_client
*clp
= calldata
->clp
;
5096 struct nfs4_sequence_res
*res
= &calldata
->res
.seq_res
;
5098 dprintk("--> %s\n", __func__
);
5099 nfs41_sequence_done(clp
, res
, task
->tk_status
);
5100 switch (task
->tk_status
) {
5102 case -NFS4ERR_COMPLETE_ALREADY
:
5104 case -NFS4ERR_BADSESSION
:
5105 case -NFS4ERR_DEADSESSION
:
5107 * Handle the session error, but do not retry the operation, as
5108 * we have no way of telling whether the clientid had to be
5109 * reset before we got our reply. If reset, a new wave of
5110 * reclaim operations will follow, containing their own reclaim
5111 * complete. We don't want our retry to get on the way of
5112 * recovery by incorrectly indicating to the server that we're
5113 * done reclaiming state since the process had to be restarted.
5115 _nfs4_async_handle_error(task
, NULL
, clp
, NULL
);
5118 if (_nfs4_async_handle_error(
5119 task
, NULL
, clp
, NULL
) == -EAGAIN
) {
5120 rpc_restart_call_prepare(task
);
5125 dprintk("<-- %s\n", __func__
);
5128 static void nfs4_free_reclaim_complete_data(void *data
)
5130 struct nfs4_reclaim_complete_data
*calldata
= data
;
5135 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops
= {
5136 .rpc_call_prepare
= nfs4_reclaim_complete_prepare
,
5137 .rpc_call_done
= nfs4_reclaim_complete_done
,
5138 .rpc_release
= nfs4_free_reclaim_complete_data
,
5142 * Issue a global reclaim complete.
5144 static int nfs41_proc_reclaim_complete(struct nfs_client
*clp
)
5146 struct nfs4_reclaim_complete_data
*calldata
;
5147 struct rpc_task
*task
;
5148 struct rpc_message msg
= {
5149 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RECLAIM_COMPLETE
],
5151 struct rpc_task_setup task_setup_data
= {
5152 .rpc_client
= clp
->cl_rpcclient
,
5153 .rpc_message
= &msg
,
5154 .callback_ops
= &nfs4_reclaim_complete_call_ops
,
5155 .flags
= RPC_TASK_ASYNC
,
5157 int status
= -ENOMEM
;
5159 dprintk("--> %s\n", __func__
);
5160 calldata
= kzalloc(sizeof(*calldata
), GFP_KERNEL
);
5161 if (calldata
== NULL
)
5163 calldata
->clp
= clp
;
5164 calldata
->arg
.one_fs
= 0;
5165 calldata
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
5167 msg
.rpc_argp
= &calldata
->arg
;
5168 msg
.rpc_resp
= &calldata
->res
;
5169 task_setup_data
.callback_data
= calldata
;
5170 task
= rpc_run_task(&task_setup_data
);
5172 status
= PTR_ERR(task
);
5175 dprintk("<-- %s status=%d\n", __func__
, status
);
5178 #endif /* CONFIG_NFS_V4_1 */
5180 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops
= {
5181 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
5182 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
5183 .recover_open
= nfs4_open_reclaim
,
5184 .recover_lock
= nfs4_lock_reclaim
,
5185 .establish_clid
= nfs4_init_clientid
,
5186 .get_clid_cred
= nfs4_get_setclientid_cred
,
5189 #if defined(CONFIG_NFS_V4_1)
5190 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops
= {
5191 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
5192 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
5193 .recover_open
= nfs4_open_reclaim
,
5194 .recover_lock
= nfs4_lock_reclaim
,
5195 .establish_clid
= nfs41_init_clientid
,
5196 .get_clid_cred
= nfs4_get_exchange_id_cred
,
5197 .reclaim_complete
= nfs41_proc_reclaim_complete
,
5199 #endif /* CONFIG_NFS_V4_1 */
5201 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops
= {
5202 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
5203 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
5204 .recover_open
= nfs4_open_expired
,
5205 .recover_lock
= nfs4_lock_expired
,
5206 .establish_clid
= nfs4_init_clientid
,
5207 .get_clid_cred
= nfs4_get_setclientid_cred
,
5210 #if defined(CONFIG_NFS_V4_1)
5211 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops
= {
5212 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
5213 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
5214 .recover_open
= nfs4_open_expired
,
5215 .recover_lock
= nfs4_lock_expired
,
5216 .establish_clid
= nfs41_init_clientid
,
5217 .get_clid_cred
= nfs4_get_exchange_id_cred
,
5219 #endif /* CONFIG_NFS_V4_1 */
5221 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops
= {
5222 .sched_state_renewal
= nfs4_proc_async_renew
,
5223 .get_state_renewal_cred_locked
= nfs4_get_renew_cred_locked
,
5224 .renew_lease
= nfs4_proc_renew
,
5227 #if defined(CONFIG_NFS_V4_1)
5228 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops
= {
5229 .sched_state_renewal
= nfs41_proc_async_sequence
,
5230 .get_state_renewal_cred_locked
= nfs4_get_machine_cred_locked
,
5231 .renew_lease
= nfs4_proc_sequence
,
5236 * Per minor version reboot and network partition recovery ops
5239 struct nfs4_state_recovery_ops
*nfs4_reboot_recovery_ops
[] = {
5240 &nfs40_reboot_recovery_ops
,
5241 #if defined(CONFIG_NFS_V4_1)
5242 &nfs41_reboot_recovery_ops
,
5246 struct nfs4_state_recovery_ops
*nfs4_nograce_recovery_ops
[] = {
5247 &nfs40_nograce_recovery_ops
,
5248 #if defined(CONFIG_NFS_V4_1)
5249 &nfs41_nograce_recovery_ops
,
5253 struct nfs4_state_maintenance_ops
*nfs4_state_renewal_ops
[] = {
5254 &nfs40_state_renewal_ops
,
5255 #if defined(CONFIG_NFS_V4_1)
5256 &nfs41_state_renewal_ops
,
5260 static const struct inode_operations nfs4_file_inode_operations
= {
5261 .permission
= nfs_permission
,
5262 .getattr
= nfs_getattr
,
5263 .setattr
= nfs_setattr
,
5264 .getxattr
= nfs4_getxattr
,
5265 .setxattr
= nfs4_setxattr
,
5266 .listxattr
= nfs4_listxattr
,
5269 const struct nfs_rpc_ops nfs_v4_clientops
= {
5270 .version
= 4, /* protocol version */
5271 .dentry_ops
= &nfs4_dentry_operations
,
5272 .dir_inode_ops
= &nfs4_dir_inode_operations
,
5273 .file_inode_ops
= &nfs4_file_inode_operations
,
5274 .getroot
= nfs4_proc_get_root
,
5275 .getattr
= nfs4_proc_getattr
,
5276 .setattr
= nfs4_proc_setattr
,
5277 .lookupfh
= nfs4_proc_lookupfh
,
5278 .lookup
= nfs4_proc_lookup
,
5279 .access
= nfs4_proc_access
,
5280 .readlink
= nfs4_proc_readlink
,
5281 .create
= nfs4_proc_create
,
5282 .remove
= nfs4_proc_remove
,
5283 .unlink_setup
= nfs4_proc_unlink_setup
,
5284 .unlink_done
= nfs4_proc_unlink_done
,
5285 .rename
= nfs4_proc_rename
,
5286 .link
= nfs4_proc_link
,
5287 .symlink
= nfs4_proc_symlink
,
5288 .mkdir
= nfs4_proc_mkdir
,
5289 .rmdir
= nfs4_proc_remove
,
5290 .readdir
= nfs4_proc_readdir
,
5291 .mknod
= nfs4_proc_mknod
,
5292 .statfs
= nfs4_proc_statfs
,
5293 .fsinfo
= nfs4_proc_fsinfo
,
5294 .pathconf
= nfs4_proc_pathconf
,
5295 .set_capabilities
= nfs4_server_capabilities
,
5296 .decode_dirent
= nfs4_decode_dirent
,
5297 .read_setup
= nfs4_proc_read_setup
,
5298 .read_done
= nfs4_read_done
,
5299 .write_setup
= nfs4_proc_write_setup
,
5300 .write_done
= nfs4_write_done
,
5301 .commit_setup
= nfs4_proc_commit_setup
,
5302 .commit_done
= nfs4_commit_done
,
5303 .lock
= nfs4_proc_lock
,
5304 .clear_acl_cache
= nfs4_zap_acl_attr
,
5305 .close_context
= nfs4_close_context
,