4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/slab.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/namei.h>
49 #include <linux/mount.h>
50 #include <linux/module.h>
51 #include <linux/sunrpc/bc_xprt.h>
54 #include "delegation.h"
59 #define NFSDBG_FACILITY NFSDBG_PROC
61 #define NFS4_POLL_RETRY_MIN (HZ/10)
62 #define NFS4_POLL_RETRY_MAX (15*HZ)
64 #define NFS4_MAX_LOOP_ON_RECOVER (10)
67 static int _nfs4_proc_open(struct nfs4_opendata
*data
);
68 static int _nfs4_recover_proc_open(struct nfs4_opendata
*data
);
69 static int nfs4_do_fsinfo(struct nfs_server
*, struct nfs_fh
*, struct nfs_fsinfo
*);
70 static int nfs4_async_handle_error(struct rpc_task
*, const struct nfs_server
*, struct nfs4_state
*);
71 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
72 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
73 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
74 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
75 struct nfs4_state
*state
);
77 /* Prevent leaks of NFSv4 errors into userland */
78 static int nfs4_map_errors(int err
)
83 case -NFS4ERR_RESOURCE
:
86 dprintk("%s could not handle NFSv4 error %d\n",
94 * This is our standard bitmap for GETATTR requests.
96 const u32 nfs4_fattr_bitmap
[2] = {
101 | FATTR4_WORD0_FILEID
,
103 | FATTR4_WORD1_NUMLINKS
105 | FATTR4_WORD1_OWNER_GROUP
106 | FATTR4_WORD1_RAWDEV
107 | FATTR4_WORD1_SPACE_USED
108 | FATTR4_WORD1_TIME_ACCESS
109 | FATTR4_WORD1_TIME_METADATA
110 | FATTR4_WORD1_TIME_MODIFY
113 const u32 nfs4_statfs_bitmap
[2] = {
114 FATTR4_WORD0_FILES_AVAIL
115 | FATTR4_WORD0_FILES_FREE
116 | FATTR4_WORD0_FILES_TOTAL
,
117 FATTR4_WORD1_SPACE_AVAIL
118 | FATTR4_WORD1_SPACE_FREE
119 | FATTR4_WORD1_SPACE_TOTAL
122 const u32 nfs4_pathconf_bitmap
[2] = {
124 | FATTR4_WORD0_MAXNAME
,
128 const u32 nfs4_fsinfo_bitmap
[2] = { FATTR4_WORD0_MAXFILESIZE
129 | FATTR4_WORD0_MAXREAD
130 | FATTR4_WORD0_MAXWRITE
131 | FATTR4_WORD0_LEASE_TIME
,
135 const u32 nfs4_fs_locations_bitmap
[2] = {
137 | FATTR4_WORD0_CHANGE
140 | FATTR4_WORD0_FILEID
141 | FATTR4_WORD0_FS_LOCATIONS
,
143 | FATTR4_WORD1_NUMLINKS
145 | FATTR4_WORD1_OWNER_GROUP
146 | FATTR4_WORD1_RAWDEV
147 | FATTR4_WORD1_SPACE_USED
148 | FATTR4_WORD1_TIME_ACCESS
149 | FATTR4_WORD1_TIME_METADATA
150 | FATTR4_WORD1_TIME_MODIFY
151 | FATTR4_WORD1_MOUNTED_ON_FILEID
154 static void nfs4_setup_readdir(u64 cookie
, __be32
*verifier
, struct dentry
*dentry
,
155 struct nfs4_readdir_arg
*readdir
)
159 BUG_ON(readdir
->count
< 80);
161 readdir
->cookie
= cookie
;
162 memcpy(&readdir
->verifier
, verifier
, sizeof(readdir
->verifier
));
167 memset(&readdir
->verifier
, 0, sizeof(readdir
->verifier
));
172 * NFSv4 servers do not return entries for '.' and '..'
173 * Therefore, we fake these entries here. We let '.'
174 * have cookie 0 and '..' have cookie 1. Note that
175 * when talking to the server, we always send cookie 0
178 start
= p
= kmap_atomic(*readdir
->pages
, KM_USER0
);
181 *p
++ = xdr_one
; /* next */
182 *p
++ = xdr_zero
; /* cookie, first word */
183 *p
++ = xdr_one
; /* cookie, second word */
184 *p
++ = xdr_one
; /* entry len */
185 memcpy(p
, ".\0\0\0", 4); /* entry */
187 *p
++ = xdr_one
; /* bitmap length */
188 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
189 *p
++ = htonl(8); /* attribute buffer length */
190 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_inode
));
193 *p
++ = xdr_one
; /* next */
194 *p
++ = xdr_zero
; /* cookie, first word */
195 *p
++ = xdr_two
; /* cookie, second word */
196 *p
++ = xdr_two
; /* entry len */
197 memcpy(p
, "..\0\0", 4); /* entry */
199 *p
++ = xdr_one
; /* bitmap length */
200 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
201 *p
++ = htonl(8); /* attribute buffer length */
202 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_parent
->d_inode
));
204 readdir
->pgbase
= (char *)p
- (char *)start
;
205 readdir
->count
-= readdir
->pgbase
;
206 kunmap_atomic(start
, KM_USER0
);
209 static int nfs4_wait_clnt_recover(struct nfs_client
*clp
)
215 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
,
216 nfs_wait_bit_killable
, TASK_KILLABLE
);
220 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
227 *timeout
= NFS4_POLL_RETRY_MIN
;
228 if (*timeout
> NFS4_POLL_RETRY_MAX
)
229 *timeout
= NFS4_POLL_RETRY_MAX
;
230 schedule_timeout_killable(*timeout
);
231 if (fatal_signal_pending(current
))
237 /* This is the error handling routine for processes that are allowed
240 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
242 struct nfs_client
*clp
= server
->nfs_client
;
243 struct nfs4_state
*state
= exception
->state
;
246 exception
->retry
= 0;
250 case -NFS4ERR_ADMIN_REVOKED
:
251 case -NFS4ERR_BAD_STATEID
:
252 case -NFS4ERR_OPENMODE
:
255 nfs4_state_mark_reclaim_nograce(clp
, state
);
256 goto do_state_recovery
;
257 case -NFS4ERR_STALE_STATEID
:
260 nfs4_state_mark_reclaim_reboot(clp
, state
);
261 case -NFS4ERR_STALE_CLIENTID
:
262 case -NFS4ERR_EXPIRED
:
263 goto do_state_recovery
;
264 #if defined(CONFIG_NFS_V4_1)
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
289 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
292 case -NFS4ERR_OLD_STATEID
:
293 exception
->retry
= 1;
295 /* We failed to handle the error */
296 return nfs4_map_errors(ret
);
298 nfs4_schedule_state_recovery(clp
);
299 ret
= nfs4_wait_clnt_recover(clp
);
301 exception
->retry
= 1;
306 static void renew_lease(const struct nfs_server
*server
, unsigned long timestamp
)
308 struct nfs_client
*clp
= server
->nfs_client
;
309 spin_lock(&clp
->cl_lock
);
310 if (time_before(clp
->cl_last_renewal
,timestamp
))
311 clp
->cl_last_renewal
= timestamp
;
312 spin_unlock(&clp
->cl_lock
);
315 #if defined(CONFIG_NFS_V4_1)
318 * nfs4_free_slot - free a slot and efficiently update slot table.
320 * freeing a slot is trivially done by clearing its respective bit
322 * If the freed slotid equals highest_used_slotid we want to update it
323 * so that the server would be able to size down the slot table if needed,
324 * otherwise we know that the highest_used_slotid is still in use.
325 * When updating highest_used_slotid there may be "holes" in the bitmap
326 * so we need to scan down from highest_used_slotid to 0 looking for the now
327 * highest slotid in use.
328 * If none found, highest_used_slotid is set to -1.
330 * Must be called while holding tbl->slot_tbl_lock
333 nfs4_free_slot(struct nfs4_slot_table
*tbl
, u8 free_slotid
)
335 int slotid
= free_slotid
;
337 /* clear used bit in bitmap */
338 __clear_bit(slotid
, tbl
->used_slots
);
340 /* update highest_used_slotid when it is freed */
341 if (slotid
== tbl
->highest_used_slotid
) {
342 slotid
= find_last_bit(tbl
->used_slots
, tbl
->max_slots
);
343 if (slotid
< tbl
->max_slots
)
344 tbl
->highest_used_slotid
= slotid
;
346 tbl
->highest_used_slotid
= -1;
348 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__
,
349 free_slotid
, tbl
->highest_used_slotid
);
353 * Signal state manager thread if session is drained
355 static void nfs41_check_drain_session_complete(struct nfs4_session
*ses
)
357 struct rpc_task
*task
;
359 if (!test_bit(NFS4_SESSION_DRAINING
, &ses
->session_state
)) {
360 task
= rpc_wake_up_next(&ses
->fc_slot_table
.slot_tbl_waitq
);
362 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
366 if (ses
->fc_slot_table
.highest_used_slotid
!= -1)
369 dprintk("%s COMPLETE: Session Drained\n", __func__
);
370 complete(&ses
->complete
);
373 static void nfs41_sequence_free_slot(struct nfs4_sequence_res
*res
)
375 struct nfs4_slot_table
*tbl
;
377 tbl
= &res
->sr_session
->fc_slot_table
;
378 if (res
->sr_slotid
== NFS4_MAX_SLOT_TABLE
) {
379 /* just wake up the next guy waiting since
380 * we may have not consumed a slot after all */
381 dprintk("%s: No slot\n", __func__
);
385 spin_lock(&tbl
->slot_tbl_lock
);
386 nfs4_free_slot(tbl
, res
->sr_slotid
);
387 nfs41_check_drain_session_complete(res
->sr_session
);
388 spin_unlock(&tbl
->slot_tbl_lock
);
389 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
392 static void nfs41_sequence_done(struct nfs4_sequence_res
*res
)
394 unsigned long timestamp
;
395 struct nfs4_slot_table
*tbl
;
396 struct nfs4_slot
*slot
;
399 * sr_status remains 1 if an RPC level error occurred. The server
400 * may or may not have processed the sequence operation..
401 * Proceed as if the server received and processed the sequence
404 if (res
->sr_status
== 1)
405 res
->sr_status
= NFS_OK
;
407 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
408 if (res
->sr_slotid
== NFS4_MAX_SLOT_TABLE
)
411 /* Check the SEQUENCE operation status */
412 if (res
->sr_status
== 0) {
413 struct nfs_client
*clp
= res
->sr_session
->clp
;
414 tbl
= &res
->sr_session
->fc_slot_table
;
415 slot
= tbl
->slots
+ res
->sr_slotid
;
416 /* Update the slot's sequence and clientid lease timer */
418 timestamp
= res
->sr_renewal_time
;
419 spin_lock(&clp
->cl_lock
);
420 if (time_before(clp
->cl_last_renewal
, timestamp
))
421 clp
->cl_last_renewal
= timestamp
;
422 spin_unlock(&clp
->cl_lock
);
423 /* Check sequence flags */
424 if (atomic_read(&clp
->cl_count
) > 1)
425 nfs41_handle_sequence_flag_errors(clp
, res
->sr_status_flags
);
428 /* The session may be reset by one of the error handlers. */
429 dprintk("%s: Error %d free the slot \n", __func__
, res
->sr_status
);
430 nfs41_sequence_free_slot(res
);
433 static void nfs4_sequence_done(const struct nfs_server
*server
,
434 struct nfs4_sequence_res
*res
, int rpc_status
)
436 if (res
->sr_session
!= NULL
)
437 nfs41_sequence_done(res
);
441 * nfs4_find_slot - efficiently look for a free slot
443 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
444 * If found, we mark the slot as used, update the highest_used_slotid,
445 * and respectively set up the sequence operation args.
446 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
448 * Note: must be called with under the slot_tbl_lock.
451 nfs4_find_slot(struct nfs4_slot_table
*tbl
)
454 u8 ret_id
= NFS4_MAX_SLOT_TABLE
;
455 BUILD_BUG_ON((u8
)NFS4_MAX_SLOT_TABLE
!= (int)NFS4_MAX_SLOT_TABLE
);
457 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
458 __func__
, tbl
->used_slots
[0], tbl
->highest_used_slotid
,
460 slotid
= find_first_zero_bit(tbl
->used_slots
, tbl
->max_slots
);
461 if (slotid
>= tbl
->max_slots
)
463 __set_bit(slotid
, tbl
->used_slots
);
464 if (slotid
> tbl
->highest_used_slotid
)
465 tbl
->highest_used_slotid
= slotid
;
468 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
469 __func__
, tbl
->used_slots
[0], tbl
->highest_used_slotid
, ret_id
);
473 static int nfs41_setup_sequence(struct nfs4_session
*session
,
474 struct nfs4_sequence_args
*args
,
475 struct nfs4_sequence_res
*res
,
477 struct rpc_task
*task
)
479 struct nfs4_slot
*slot
;
480 struct nfs4_slot_table
*tbl
;
483 dprintk("--> %s\n", __func__
);
484 /* slot already allocated? */
485 if (res
->sr_slotid
!= NFS4_MAX_SLOT_TABLE
)
488 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
489 tbl
= &session
->fc_slot_table
;
491 spin_lock(&tbl
->slot_tbl_lock
);
492 if (test_bit(NFS4_SESSION_DRAINING
, &session
->session_state
) &&
493 !rpc_task_has_priority(task
, RPC_PRIORITY_PRIVILEGED
)) {
495 * The state manager will wait until the slot table is empty.
496 * Schedule the reset thread
498 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
499 spin_unlock(&tbl
->slot_tbl_lock
);
500 dprintk("%s Schedule Session Reset\n", __func__
);
504 if (!rpc_queue_empty(&tbl
->slot_tbl_waitq
) &&
505 !rpc_task_has_priority(task
, RPC_PRIORITY_PRIVILEGED
)) {
506 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
507 spin_unlock(&tbl
->slot_tbl_lock
);
508 dprintk("%s enforce FIFO order\n", __func__
);
512 slotid
= nfs4_find_slot(tbl
);
513 if (slotid
== NFS4_MAX_SLOT_TABLE
) {
514 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
515 spin_unlock(&tbl
->slot_tbl_lock
);
516 dprintk("<-- %s: no free slots\n", __func__
);
519 spin_unlock(&tbl
->slot_tbl_lock
);
521 rpc_task_set_priority(task
, RPC_PRIORITY_NORMAL
);
522 slot
= tbl
->slots
+ slotid
;
523 args
->sa_session
= session
;
524 args
->sa_slotid
= slotid
;
525 args
->sa_cache_this
= cache_reply
;
527 dprintk("<-- %s slotid=%d seqid=%d\n", __func__
, slotid
, slot
->seq_nr
);
529 res
->sr_session
= session
;
530 res
->sr_slotid
= slotid
;
531 res
->sr_renewal_time
= jiffies
;
532 res
->sr_status_flags
= 0;
534 * sr_status is only set in decode_sequence, and so will remain
535 * set to 1 if an rpc level failure occurs.
541 int nfs4_setup_sequence(const struct nfs_server
*server
,
542 struct nfs4_sequence_args
*args
,
543 struct nfs4_sequence_res
*res
,
545 struct rpc_task
*task
)
547 struct nfs4_session
*session
= nfs4_get_session(server
);
550 if (session
== NULL
) {
551 args
->sa_session
= NULL
;
552 res
->sr_session
= NULL
;
556 dprintk("--> %s clp %p session %p sr_slotid %d\n",
557 __func__
, session
->clp
, session
, res
->sr_slotid
);
559 ret
= nfs41_setup_sequence(session
, args
, res
, cache_reply
,
562 dprintk("<-- %s status=%d\n", __func__
, ret
);
566 struct nfs41_call_sync_data
{
567 const struct nfs_server
*seq_server
;
568 struct nfs4_sequence_args
*seq_args
;
569 struct nfs4_sequence_res
*seq_res
;
573 static void nfs41_call_sync_prepare(struct rpc_task
*task
, void *calldata
)
575 struct nfs41_call_sync_data
*data
= calldata
;
577 dprintk("--> %s data->seq_server %p\n", __func__
, data
->seq_server
);
579 if (nfs4_setup_sequence(data
->seq_server
, data
->seq_args
,
580 data
->seq_res
, data
->cache_reply
, task
))
582 rpc_call_start(task
);
585 static void nfs41_call_priv_sync_prepare(struct rpc_task
*task
, void *calldata
)
587 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
588 nfs41_call_sync_prepare(task
, calldata
);
591 static void nfs41_call_sync_done(struct rpc_task
*task
, void *calldata
)
593 struct nfs41_call_sync_data
*data
= calldata
;
595 nfs41_sequence_done(data
->seq_res
);
598 struct rpc_call_ops nfs41_call_sync_ops
= {
599 .rpc_call_prepare
= nfs41_call_sync_prepare
,
600 .rpc_call_done
= nfs41_call_sync_done
,
603 struct rpc_call_ops nfs41_call_priv_sync_ops
= {
604 .rpc_call_prepare
= nfs41_call_priv_sync_prepare
,
605 .rpc_call_done
= nfs41_call_sync_done
,
608 static int nfs4_call_sync_sequence(struct nfs_server
*server
,
609 struct rpc_message
*msg
,
610 struct nfs4_sequence_args
*args
,
611 struct nfs4_sequence_res
*res
,
616 struct rpc_task
*task
;
617 struct nfs41_call_sync_data data
= {
618 .seq_server
= server
,
621 .cache_reply
= cache_reply
,
623 struct rpc_task_setup task_setup
= {
624 .rpc_client
= server
->client
,
626 .callback_ops
= &nfs41_call_sync_ops
,
627 .callback_data
= &data
630 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
632 task_setup
.callback_ops
= &nfs41_call_priv_sync_ops
;
633 task
= rpc_run_task(&task_setup
);
637 ret
= task
->tk_status
;
643 int _nfs4_call_sync_session(struct nfs_server
*server
,
644 struct rpc_message
*msg
,
645 struct nfs4_sequence_args
*args
,
646 struct nfs4_sequence_res
*res
,
649 return nfs4_call_sync_sequence(server
, msg
, args
, res
, cache_reply
, 0);
653 static void nfs4_sequence_done(const struct nfs_server
*server
,
654 struct nfs4_sequence_res
*res
, int rpc_status
)
657 #endif /* CONFIG_NFS_V4_1 */
659 int _nfs4_call_sync(struct nfs_server
*server
,
660 struct rpc_message
*msg
,
661 struct nfs4_sequence_args
*args
,
662 struct nfs4_sequence_res
*res
,
665 args
->sa_session
= res
->sr_session
= NULL
;
666 return rpc_call_sync(server
->client
, msg
, 0);
669 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
670 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
671 &(res)->seq_res, (cache_reply))
673 static void update_changeattr(struct inode
*dir
, struct nfs4_change_info
*cinfo
)
675 struct nfs_inode
*nfsi
= NFS_I(dir
);
677 spin_lock(&dir
->i_lock
);
678 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
|NFS_INO_INVALID_DATA
;
679 if (!cinfo
->atomic
|| cinfo
->before
!= nfsi
->change_attr
)
680 nfs_force_lookup_revalidate(dir
);
681 nfsi
->change_attr
= cinfo
->after
;
682 spin_unlock(&dir
->i_lock
);
685 struct nfs4_opendata
{
687 struct nfs_openargs o_arg
;
688 struct nfs_openres o_res
;
689 struct nfs_open_confirmargs c_arg
;
690 struct nfs_open_confirmres c_res
;
691 struct nfs_fattr f_attr
;
692 struct nfs_fattr dir_attr
;
695 struct nfs4_state_owner
*owner
;
696 struct nfs4_state
*state
;
698 unsigned long timestamp
;
699 unsigned int rpc_done
: 1;
705 static void nfs4_init_opendata_res(struct nfs4_opendata
*p
)
707 p
->o_res
.f_attr
= &p
->f_attr
;
708 p
->o_res
.dir_attr
= &p
->dir_attr
;
709 p
->o_res
.seqid
= p
->o_arg
.seqid
;
710 p
->c_res
.seqid
= p
->c_arg
.seqid
;
711 p
->o_res
.server
= p
->o_arg
.server
;
712 nfs_fattr_init(&p
->f_attr
);
713 nfs_fattr_init(&p
->dir_attr
);
714 p
->o_res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
717 static struct nfs4_opendata
*nfs4_opendata_alloc(struct path
*path
,
718 struct nfs4_state_owner
*sp
, fmode_t fmode
, int flags
,
719 const struct iattr
*attrs
,
722 struct dentry
*parent
= dget_parent(path
->dentry
);
723 struct inode
*dir
= parent
->d_inode
;
724 struct nfs_server
*server
= NFS_SERVER(dir
);
725 struct nfs4_opendata
*p
;
727 p
= kzalloc(sizeof(*p
), gfp_mask
);
730 p
->o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
, gfp_mask
);
731 if (p
->o_arg
.seqid
== NULL
)
737 atomic_inc(&sp
->so_count
);
738 p
->o_arg
.fh
= NFS_FH(dir
);
739 p
->o_arg
.open_flags
= flags
;
740 p
->o_arg
.fmode
= fmode
& (FMODE_READ
|FMODE_WRITE
);
741 p
->o_arg
.clientid
= server
->nfs_client
->cl_clientid
;
742 p
->o_arg
.id
= sp
->so_owner_id
.id
;
743 p
->o_arg
.name
= &p
->path
.dentry
->d_name
;
744 p
->o_arg
.server
= server
;
745 p
->o_arg
.bitmask
= server
->attr_bitmask
;
746 p
->o_arg
.claim
= NFS4_OPEN_CLAIM_NULL
;
747 if (flags
& O_EXCL
) {
748 if (nfs4_has_persistent_session(server
->nfs_client
)) {
750 p
->o_arg
.u
.attrs
= &p
->attrs
;
751 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
752 } else { /* EXCLUSIVE4_1 */
753 u32
*s
= (u32
*) p
->o_arg
.u
.verifier
.data
;
757 } else if (flags
& O_CREAT
) {
758 p
->o_arg
.u
.attrs
= &p
->attrs
;
759 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
761 p
->c_arg
.fh
= &p
->o_res
.fh
;
762 p
->c_arg
.stateid
= &p
->o_res
.stateid
;
763 p
->c_arg
.seqid
= p
->o_arg
.seqid
;
764 nfs4_init_opendata_res(p
);
774 static void nfs4_opendata_free(struct kref
*kref
)
776 struct nfs4_opendata
*p
= container_of(kref
,
777 struct nfs4_opendata
, kref
);
779 nfs_free_seqid(p
->o_arg
.seqid
);
780 if (p
->state
!= NULL
)
781 nfs4_put_open_state(p
->state
);
782 nfs4_put_state_owner(p
->owner
);
788 static void nfs4_opendata_put(struct nfs4_opendata
*p
)
791 kref_put(&p
->kref
, nfs4_opendata_free
);
794 static int nfs4_wait_for_completion_rpc_task(struct rpc_task
*task
)
798 ret
= rpc_wait_for_completion_task(task
);
802 static int can_open_cached(struct nfs4_state
*state
, fmode_t mode
, int open_mode
)
806 if (open_mode
& O_EXCL
)
808 switch (mode
& (FMODE_READ
|FMODE_WRITE
)) {
810 ret
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0
811 && state
->n_rdonly
!= 0;
814 ret
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0
815 && state
->n_wronly
!= 0;
817 case FMODE_READ
|FMODE_WRITE
:
818 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0
819 && state
->n_rdwr
!= 0;
825 static int can_open_delegated(struct nfs_delegation
*delegation
, fmode_t fmode
)
827 if ((delegation
->type
& fmode
) != fmode
)
829 if (test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
))
831 nfs_mark_delegation_referenced(delegation
);
835 static void update_open_stateflags(struct nfs4_state
*state
, fmode_t fmode
)
844 case FMODE_READ
|FMODE_WRITE
:
847 nfs4_state_set_mode_locked(state
, state
->state
| fmode
);
850 static void nfs_set_open_stateid_locked(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
852 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
853 memcpy(state
->stateid
.data
, stateid
->data
, sizeof(state
->stateid
.data
));
854 memcpy(state
->open_stateid
.data
, stateid
->data
, sizeof(state
->open_stateid
.data
));
857 set_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
860 set_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
862 case FMODE_READ
|FMODE_WRITE
:
863 set_bit(NFS_O_RDWR_STATE
, &state
->flags
);
867 static void nfs_set_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
869 write_seqlock(&state
->seqlock
);
870 nfs_set_open_stateid_locked(state
, stateid
, fmode
);
871 write_sequnlock(&state
->seqlock
);
874 static void __update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, const nfs4_stateid
*deleg_stateid
, fmode_t fmode
)
877 * Protect the call to nfs4_state_set_mode_locked and
878 * serialise the stateid update
880 write_seqlock(&state
->seqlock
);
881 if (deleg_stateid
!= NULL
) {
882 memcpy(state
->stateid
.data
, deleg_stateid
->data
, sizeof(state
->stateid
.data
));
883 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
885 if (open_stateid
!= NULL
)
886 nfs_set_open_stateid_locked(state
, open_stateid
, fmode
);
887 write_sequnlock(&state
->seqlock
);
888 spin_lock(&state
->owner
->so_lock
);
889 update_open_stateflags(state
, fmode
);
890 spin_unlock(&state
->owner
->so_lock
);
893 static int update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, nfs4_stateid
*delegation
, fmode_t fmode
)
895 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
896 struct nfs_delegation
*deleg_cur
;
899 fmode
&= (FMODE_READ
|FMODE_WRITE
);
902 deleg_cur
= rcu_dereference(nfsi
->delegation
);
903 if (deleg_cur
== NULL
)
906 spin_lock(&deleg_cur
->lock
);
907 if (nfsi
->delegation
!= deleg_cur
||
908 (deleg_cur
->type
& fmode
) != fmode
)
909 goto no_delegation_unlock
;
911 if (delegation
== NULL
)
912 delegation
= &deleg_cur
->stateid
;
913 else if (memcmp(deleg_cur
->stateid
.data
, delegation
->data
, NFS4_STATEID_SIZE
) != 0)
914 goto no_delegation_unlock
;
916 nfs_mark_delegation_referenced(deleg_cur
);
917 __update_open_stateid(state
, open_stateid
, &deleg_cur
->stateid
, fmode
);
919 no_delegation_unlock
:
920 spin_unlock(&deleg_cur
->lock
);
924 if (!ret
&& open_stateid
!= NULL
) {
925 __update_open_stateid(state
, open_stateid
, NULL
, fmode
);
933 static void nfs4_return_incompatible_delegation(struct inode
*inode
, fmode_t fmode
)
935 struct nfs_delegation
*delegation
;
938 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
939 if (delegation
== NULL
|| (delegation
->type
& fmode
) == fmode
) {
944 nfs_inode_return_delegation(inode
);
947 static struct nfs4_state
*nfs4_try_open_cached(struct nfs4_opendata
*opendata
)
949 struct nfs4_state
*state
= opendata
->state
;
950 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
951 struct nfs_delegation
*delegation
;
952 int open_mode
= opendata
->o_arg
.open_flags
& O_EXCL
;
953 fmode_t fmode
= opendata
->o_arg
.fmode
;
954 nfs4_stateid stateid
;
958 if (can_open_cached(state
, fmode
, open_mode
)) {
959 spin_lock(&state
->owner
->so_lock
);
960 if (can_open_cached(state
, fmode
, open_mode
)) {
961 update_open_stateflags(state
, fmode
);
962 spin_unlock(&state
->owner
->so_lock
);
963 goto out_return_state
;
965 spin_unlock(&state
->owner
->so_lock
);
968 delegation
= rcu_dereference(nfsi
->delegation
);
969 if (delegation
== NULL
||
970 !can_open_delegated(delegation
, fmode
)) {
974 /* Save the delegation */
975 memcpy(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
));
977 ret
= nfs_may_open(state
->inode
, state
->owner
->so_cred
, open_mode
);
982 /* Try to update the stateid using the delegation */
983 if (update_open_stateid(state
, NULL
, &stateid
, fmode
))
984 goto out_return_state
;
989 atomic_inc(&state
->count
);
993 static struct nfs4_state
*nfs4_opendata_to_nfs4_state(struct nfs4_opendata
*data
)
996 struct nfs4_state
*state
= NULL
;
997 struct nfs_delegation
*delegation
;
1000 if (!data
->rpc_done
) {
1001 state
= nfs4_try_open_cached(data
);
1006 if (!(data
->f_attr
.valid
& NFS_ATTR_FATTR
))
1008 inode
= nfs_fhget(data
->dir
->d_sb
, &data
->o_res
.fh
, &data
->f_attr
);
1009 ret
= PTR_ERR(inode
);
1013 state
= nfs4_get_open_state(inode
, data
->owner
);
1016 if (data
->o_res
.delegation_type
!= 0) {
1017 int delegation_flags
= 0;
1020 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
1022 delegation_flags
= delegation
->flags
;
1024 if ((delegation_flags
& 1UL<<NFS_DELEGATION_NEED_RECLAIM
) == 0)
1025 nfs_inode_set_delegation(state
->inode
,
1026 data
->owner
->so_cred
,
1029 nfs_inode_reclaim_delegation(state
->inode
,
1030 data
->owner
->so_cred
,
1034 update_open_stateid(state
, &data
->o_res
.stateid
, NULL
,
1042 return ERR_PTR(ret
);
1045 static struct nfs_open_context
*nfs4_state_find_open_context(struct nfs4_state
*state
)
1047 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
1048 struct nfs_open_context
*ctx
;
1050 spin_lock(&state
->inode
->i_lock
);
1051 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
1052 if (ctx
->state
!= state
)
1054 get_nfs_open_context(ctx
);
1055 spin_unlock(&state
->inode
->i_lock
);
1058 spin_unlock(&state
->inode
->i_lock
);
1059 return ERR_PTR(-ENOENT
);
1062 static struct nfs4_opendata
*nfs4_open_recoverdata_alloc(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1064 struct nfs4_opendata
*opendata
;
1066 opendata
= nfs4_opendata_alloc(&ctx
->path
, state
->owner
, 0, 0, NULL
, GFP_NOFS
);
1067 if (opendata
== NULL
)
1068 return ERR_PTR(-ENOMEM
);
1069 opendata
->state
= state
;
1070 atomic_inc(&state
->count
);
1074 static int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, fmode_t fmode
, struct nfs4_state
**res
)
1076 struct nfs4_state
*newstate
;
1079 opendata
->o_arg
.open_flags
= 0;
1080 opendata
->o_arg
.fmode
= fmode
;
1081 memset(&opendata
->o_res
, 0, sizeof(opendata
->o_res
));
1082 memset(&opendata
->c_res
, 0, sizeof(opendata
->c_res
));
1083 nfs4_init_opendata_res(opendata
);
1084 ret
= _nfs4_recover_proc_open(opendata
);
1087 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
1088 if (IS_ERR(newstate
))
1089 return PTR_ERR(newstate
);
1090 nfs4_close_state(&opendata
->path
, newstate
, fmode
);
1095 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
1097 struct nfs4_state
*newstate
;
1100 /* memory barrier prior to reading state->n_* */
1101 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
1103 if (state
->n_rdwr
!= 0) {
1104 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &newstate
);
1107 if (newstate
!= state
)
1110 if (state
->n_wronly
!= 0) {
1111 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &newstate
);
1114 if (newstate
!= state
)
1117 if (state
->n_rdonly
!= 0) {
1118 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &newstate
);
1121 if (newstate
!= state
)
1125 * We may have performed cached opens for all three recoveries.
1126 * Check if we need to update the current stateid.
1128 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0 &&
1129 memcmp(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
)) != 0) {
1130 write_seqlock(&state
->seqlock
);
1131 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
1132 memcpy(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
));
1133 write_sequnlock(&state
->seqlock
);
1140 * reclaim state on the server after a reboot.
1142 static int _nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1144 struct nfs_delegation
*delegation
;
1145 struct nfs4_opendata
*opendata
;
1146 fmode_t delegation_type
= 0;
1149 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1150 if (IS_ERR(opendata
))
1151 return PTR_ERR(opendata
);
1152 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
1153 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
1155 delegation
= rcu_dereference(NFS_I(state
->inode
)->delegation
);
1156 if (delegation
!= NULL
&& test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) != 0)
1157 delegation_type
= delegation
->type
;
1159 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
1160 status
= nfs4_open_recover(opendata
, state
);
1161 nfs4_opendata_put(opendata
);
1165 static int nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1167 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1168 struct nfs4_exception exception
= { };
1171 err
= _nfs4_do_open_reclaim(ctx
, state
);
1172 if (err
!= -NFS4ERR_DELAY
&& err
!= -EKEYEXPIRED
)
1174 nfs4_handle_exception(server
, err
, &exception
);
1175 } while (exception
.retry
);
1179 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1181 struct nfs_open_context
*ctx
;
1184 ctx
= nfs4_state_find_open_context(state
);
1186 return PTR_ERR(ctx
);
1187 ret
= nfs4_do_open_reclaim(ctx
, state
);
1188 put_nfs_open_context(ctx
);
1192 static int _nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
1194 struct nfs4_opendata
*opendata
;
1197 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1198 if (IS_ERR(opendata
))
1199 return PTR_ERR(opendata
);
1200 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
1201 memcpy(opendata
->o_arg
.u
.delegation
.data
, stateid
->data
,
1202 sizeof(opendata
->o_arg
.u
.delegation
.data
));
1203 ret
= nfs4_open_recover(opendata
, state
);
1204 nfs4_opendata_put(opendata
);
1208 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
1210 struct nfs4_exception exception
= { };
1211 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1214 err
= _nfs4_open_delegation_recall(ctx
, state
, stateid
);
1220 case -NFS4ERR_BADSESSION
:
1221 case -NFS4ERR_BADSLOT
:
1222 case -NFS4ERR_BAD_HIGH_SLOT
:
1223 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1224 case -NFS4ERR_DEADSESSION
:
1225 nfs4_schedule_state_recovery(
1226 server
->nfs_client
);
1228 case -NFS4ERR_STALE_CLIENTID
:
1229 case -NFS4ERR_STALE_STATEID
:
1230 case -NFS4ERR_EXPIRED
:
1231 /* Don't recall a delegation if it was lost */
1232 nfs4_schedule_state_recovery(server
->nfs_client
);
1236 * The show must go on: exit, but mark the
1237 * stateid as needing recovery.
1239 case -NFS4ERR_ADMIN_REVOKED
:
1240 case -NFS4ERR_BAD_STATEID
:
1241 nfs4_state_mark_reclaim_nograce(server
->nfs_client
, state
);
1246 err
= nfs4_handle_exception(server
, err
, &exception
);
1247 } while (exception
.retry
);
1252 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
1254 struct nfs4_opendata
*data
= calldata
;
1256 data
->rpc_status
= task
->tk_status
;
1257 if (RPC_ASSASSINATED(task
))
1259 if (data
->rpc_status
== 0) {
1260 memcpy(data
->o_res
.stateid
.data
, data
->c_res
.stateid
.data
,
1261 sizeof(data
->o_res
.stateid
.data
));
1262 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
1263 renew_lease(data
->o_res
.server
, data
->timestamp
);
1268 static void nfs4_open_confirm_release(void *calldata
)
1270 struct nfs4_opendata
*data
= calldata
;
1271 struct nfs4_state
*state
= NULL
;
1273 /* If this request hasn't been cancelled, do nothing */
1274 if (data
->cancelled
== 0)
1276 /* In case of error, no cleanup! */
1277 if (!data
->rpc_done
)
1279 state
= nfs4_opendata_to_nfs4_state(data
);
1281 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
1283 nfs4_opendata_put(data
);
1286 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
1287 .rpc_call_done
= nfs4_open_confirm_done
,
1288 .rpc_release
= nfs4_open_confirm_release
,
1292 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1294 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
1296 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
1297 struct rpc_task
*task
;
1298 struct rpc_message msg
= {
1299 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
1300 .rpc_argp
= &data
->c_arg
,
1301 .rpc_resp
= &data
->c_res
,
1302 .rpc_cred
= data
->owner
->so_cred
,
1304 struct rpc_task_setup task_setup_data
= {
1305 .rpc_client
= server
->client
,
1306 .rpc_message
= &msg
,
1307 .callback_ops
= &nfs4_open_confirm_ops
,
1308 .callback_data
= data
,
1309 .workqueue
= nfsiod_workqueue
,
1310 .flags
= RPC_TASK_ASYNC
,
1314 kref_get(&data
->kref
);
1316 data
->rpc_status
= 0;
1317 data
->timestamp
= jiffies
;
1318 task
= rpc_run_task(&task_setup_data
);
1320 return PTR_ERR(task
);
1321 status
= nfs4_wait_for_completion_rpc_task(task
);
1323 data
->cancelled
= 1;
1326 status
= data
->rpc_status
;
1331 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
1333 struct nfs4_opendata
*data
= calldata
;
1334 struct nfs4_state_owner
*sp
= data
->owner
;
1336 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
1339 * Check if we still need to send an OPEN call, or if we can use
1340 * a delegation instead.
1342 if (data
->state
!= NULL
) {
1343 struct nfs_delegation
*delegation
;
1345 if (can_open_cached(data
->state
, data
->o_arg
.fmode
, data
->o_arg
.open_flags
))
1348 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
1349 if (delegation
!= NULL
&&
1350 test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) == 0) {
1356 /* Update sequence id. */
1357 data
->o_arg
.id
= sp
->so_owner_id
.id
;
1358 data
->o_arg
.clientid
= sp
->so_client
->cl_clientid
;
1359 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
) {
1360 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
1361 nfs_copy_fh(&data
->o_res
.fh
, data
->o_arg
.fh
);
1363 data
->timestamp
= jiffies
;
1364 if (nfs4_setup_sequence(data
->o_arg
.server
,
1365 &data
->o_arg
.seq_args
,
1366 &data
->o_res
.seq_res
, 1, task
))
1368 rpc_call_start(task
);
1371 task
->tk_action
= NULL
;
1375 static void nfs4_recover_open_prepare(struct rpc_task
*task
, void *calldata
)
1377 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
1378 nfs4_open_prepare(task
, calldata
);
1381 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
1383 struct nfs4_opendata
*data
= calldata
;
1385 data
->rpc_status
= task
->tk_status
;
1387 nfs4_sequence_done(data
->o_arg
.server
, &data
->o_res
.seq_res
,
1390 if (RPC_ASSASSINATED(task
))
1392 if (task
->tk_status
== 0) {
1393 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
1397 data
->rpc_status
= -ELOOP
;
1400 data
->rpc_status
= -EISDIR
;
1403 data
->rpc_status
= -ENOTDIR
;
1405 renew_lease(data
->o_res
.server
, data
->timestamp
);
1406 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
1407 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
1412 static void nfs4_open_release(void *calldata
)
1414 struct nfs4_opendata
*data
= calldata
;
1415 struct nfs4_state
*state
= NULL
;
1417 /* If this request hasn't been cancelled, do nothing */
1418 if (data
->cancelled
== 0)
1420 /* In case of error, no cleanup! */
1421 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
1423 /* In case we need an open_confirm, no cleanup! */
1424 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
1426 state
= nfs4_opendata_to_nfs4_state(data
);
1428 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
1430 nfs4_opendata_put(data
);
1433 static const struct rpc_call_ops nfs4_open_ops
= {
1434 .rpc_call_prepare
= nfs4_open_prepare
,
1435 .rpc_call_done
= nfs4_open_done
,
1436 .rpc_release
= nfs4_open_release
,
1439 static const struct rpc_call_ops nfs4_recover_open_ops
= {
1440 .rpc_call_prepare
= nfs4_recover_open_prepare
,
1441 .rpc_call_done
= nfs4_open_done
,
1442 .rpc_release
= nfs4_open_release
,
1445 static int nfs4_run_open_task(struct nfs4_opendata
*data
, int isrecover
)
1447 struct inode
*dir
= data
->dir
->d_inode
;
1448 struct nfs_server
*server
= NFS_SERVER(dir
);
1449 struct nfs_openargs
*o_arg
= &data
->o_arg
;
1450 struct nfs_openres
*o_res
= &data
->o_res
;
1451 struct rpc_task
*task
;
1452 struct rpc_message msg
= {
1453 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
1456 .rpc_cred
= data
->owner
->so_cred
,
1458 struct rpc_task_setup task_setup_data
= {
1459 .rpc_client
= server
->client
,
1460 .rpc_message
= &msg
,
1461 .callback_ops
= &nfs4_open_ops
,
1462 .callback_data
= data
,
1463 .workqueue
= nfsiod_workqueue
,
1464 .flags
= RPC_TASK_ASYNC
,
1468 kref_get(&data
->kref
);
1470 data
->rpc_status
= 0;
1471 data
->cancelled
= 0;
1473 task_setup_data
.callback_ops
= &nfs4_recover_open_ops
;
1474 task
= rpc_run_task(&task_setup_data
);
1476 return PTR_ERR(task
);
1477 status
= nfs4_wait_for_completion_rpc_task(task
);
1479 data
->cancelled
= 1;
1482 status
= data
->rpc_status
;
1488 static int _nfs4_recover_proc_open(struct nfs4_opendata
*data
)
1490 struct inode
*dir
= data
->dir
->d_inode
;
1491 struct nfs_openres
*o_res
= &data
->o_res
;
1494 status
= nfs4_run_open_task(data
, 1);
1495 if (status
!= 0 || !data
->rpc_done
)
1498 nfs_refresh_inode(dir
, o_res
->dir_attr
);
1500 if (o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1501 status
= _nfs4_proc_open_confirm(data
);
1510 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1512 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
1514 struct inode
*dir
= data
->dir
->d_inode
;
1515 struct nfs_server
*server
= NFS_SERVER(dir
);
1516 struct nfs_openargs
*o_arg
= &data
->o_arg
;
1517 struct nfs_openres
*o_res
= &data
->o_res
;
1520 status
= nfs4_run_open_task(data
, 0);
1521 if (status
!= 0 || !data
->rpc_done
)
1524 if (o_arg
->open_flags
& O_CREAT
) {
1525 update_changeattr(dir
, &o_res
->cinfo
);
1526 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
1528 nfs_refresh_inode(dir
, o_res
->dir_attr
);
1529 if ((o_res
->rflags
& NFS4_OPEN_RESULT_LOCKTYPE_POSIX
) == 0)
1530 server
->caps
&= ~NFS_CAP_POSIX_LOCK
;
1531 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1532 status
= _nfs4_proc_open_confirm(data
);
1536 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
1537 _nfs4_proc_getattr(server
, &o_res
->fh
, o_res
->f_attr
);
1541 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
1543 struct nfs_client
*clp
= server
->nfs_client
;
1547 for (loop
= NFS4_MAX_LOOP_ON_RECOVER
; loop
!= 0; loop
--) {
1548 ret
= nfs4_wait_clnt_recover(clp
);
1551 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
1552 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
1554 nfs4_schedule_state_recovery(clp
);
1562 * reclaim state on the server after a network partition.
1563 * Assumes caller holds the appropriate lock
1565 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1567 struct nfs4_opendata
*opendata
;
1570 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1571 if (IS_ERR(opendata
))
1572 return PTR_ERR(opendata
);
1573 ret
= nfs4_open_recover(opendata
, state
);
1575 d_drop(ctx
->path
.dentry
);
1576 nfs4_opendata_put(opendata
);
1580 static int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1582 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1583 struct nfs4_exception exception
= { };
1587 err
= _nfs4_open_expired(ctx
, state
);
1591 case -NFS4ERR_GRACE
:
1592 case -NFS4ERR_DELAY
:
1594 nfs4_handle_exception(server
, err
, &exception
);
1597 } while (exception
.retry
);
1602 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1604 struct nfs_open_context
*ctx
;
1607 ctx
= nfs4_state_find_open_context(state
);
1609 return PTR_ERR(ctx
);
1610 ret
= nfs4_do_open_expired(ctx
, state
);
1611 put_nfs_open_context(ctx
);
1616 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1617 * fields corresponding to attributes that were used to store the verifier.
1618 * Make sure we clobber those fields in the later setattr call
1620 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1622 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1623 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1624 sattr
->ia_valid
|= ATTR_ATIME
;
1626 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1627 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1628 sattr
->ia_valid
|= ATTR_MTIME
;
1632 * Returns a referenced nfs4_state
1634 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
)
1636 struct nfs4_state_owner
*sp
;
1637 struct nfs4_state
*state
= NULL
;
1638 struct nfs_server
*server
= NFS_SERVER(dir
);
1639 struct nfs4_opendata
*opendata
;
1642 /* Protect against reboot recovery conflicts */
1644 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1645 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1648 status
= nfs4_recover_expired_lease(server
);
1650 goto err_put_state_owner
;
1651 if (path
->dentry
->d_inode
!= NULL
)
1652 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, fmode
);
1654 opendata
= nfs4_opendata_alloc(path
, sp
, fmode
, flags
, sattr
, GFP_KERNEL
);
1655 if (opendata
== NULL
)
1656 goto err_put_state_owner
;
1658 if (path
->dentry
->d_inode
!= NULL
)
1659 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1661 status
= _nfs4_proc_open(opendata
);
1663 goto err_opendata_put
;
1665 state
= nfs4_opendata_to_nfs4_state(opendata
);
1666 status
= PTR_ERR(state
);
1668 goto err_opendata_put
;
1669 if (server
->caps
& NFS_CAP_POSIX_LOCK
)
1670 set_bit(NFS_STATE_POSIX_LOCKS
, &state
->flags
);
1672 if (opendata
->o_arg
.open_flags
& O_EXCL
) {
1673 nfs4_exclusive_attrset(opendata
, sattr
);
1675 nfs_fattr_init(opendata
->o_res
.f_attr
);
1676 status
= nfs4_do_setattr(state
->inode
, cred
,
1677 opendata
->o_res
.f_attr
, sattr
,
1680 nfs_setattr_update_inode(state
->inode
, sattr
);
1681 nfs_post_op_update_inode(state
->inode
, opendata
->o_res
.f_attr
);
1683 nfs4_opendata_put(opendata
);
1684 nfs4_put_state_owner(sp
);
1688 nfs4_opendata_put(opendata
);
1689 err_put_state_owner
:
1690 nfs4_put_state_owner(sp
);
1697 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
)
1699 struct nfs4_exception exception
= { };
1700 struct nfs4_state
*res
;
1704 status
= _nfs4_do_open(dir
, path
, fmode
, flags
, sattr
, cred
, &res
);
1707 /* NOTE: BAD_SEQID means the server and client disagree about the
1708 * book-keeping w.r.t. state-changing operations
1709 * (OPEN/CLOSE/LOCK/LOCKU...)
1710 * It is actually a sign of a bug on the client or on the server.
1712 * If we receive a BAD_SEQID error in the particular case of
1713 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1714 * have unhashed the old state_owner for us, and that we can
1715 * therefore safely retry using a new one. We should still warn
1716 * the user though...
1718 if (status
== -NFS4ERR_BAD_SEQID
) {
1719 printk(KERN_WARNING
"NFS: v4 server %s "
1720 " returned a bad sequence-id error!\n",
1721 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1722 exception
.retry
= 1;
1726 * BAD_STATEID on OPEN means that the server cancelled our
1727 * state before it received the OPEN_CONFIRM.
1728 * Recover by retrying the request as per the discussion
1729 * on Page 181 of RFC3530.
1731 if (status
== -NFS4ERR_BAD_STATEID
) {
1732 exception
.retry
= 1;
1735 if (status
== -EAGAIN
) {
1736 /* We must have found a delegation */
1737 exception
.retry
= 1;
1740 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1741 status
, &exception
));
1742 } while (exception
.retry
);
1746 static int _nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1747 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1748 struct nfs4_state
*state
)
1750 struct nfs_server
*server
= NFS_SERVER(inode
);
1751 struct nfs_setattrargs arg
= {
1752 .fh
= NFS_FH(inode
),
1755 .bitmask
= server
->attr_bitmask
,
1757 struct nfs_setattrres res
= {
1761 struct rpc_message msg
= {
1762 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1767 unsigned long timestamp
= jiffies
;
1770 nfs_fattr_init(fattr
);
1772 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1773 /* Use that stateid */
1774 } else if (state
!= NULL
) {
1775 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1777 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1779 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
1780 if (status
== 0 && state
!= NULL
)
1781 renew_lease(server
, timestamp
);
1785 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1786 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1787 struct nfs4_state
*state
)
1789 struct nfs_server
*server
= NFS_SERVER(inode
);
1790 struct nfs4_exception exception
= { };
1793 err
= nfs4_handle_exception(server
,
1794 _nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
),
1796 } while (exception
.retry
);
1800 struct nfs4_closedata
{
1802 struct inode
*inode
;
1803 struct nfs4_state
*state
;
1804 struct nfs_closeargs arg
;
1805 struct nfs_closeres res
;
1806 struct nfs_fattr fattr
;
1807 unsigned long timestamp
;
1810 static void nfs4_free_closedata(void *data
)
1812 struct nfs4_closedata
*calldata
= data
;
1813 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1815 nfs4_put_open_state(calldata
->state
);
1816 nfs_free_seqid(calldata
->arg
.seqid
);
1817 nfs4_put_state_owner(sp
);
1818 path_put(&calldata
->path
);
1822 static void nfs4_close_clear_stateid_flags(struct nfs4_state
*state
,
1825 spin_lock(&state
->owner
->so_lock
);
1826 if (!(fmode
& FMODE_READ
))
1827 clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1828 if (!(fmode
& FMODE_WRITE
))
1829 clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1830 clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1831 spin_unlock(&state
->owner
->so_lock
);
1834 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1836 struct nfs4_closedata
*calldata
= data
;
1837 struct nfs4_state
*state
= calldata
->state
;
1838 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1840 nfs4_sequence_done(server
, &calldata
->res
.seq_res
, task
->tk_status
);
1841 if (RPC_ASSASSINATED(task
))
1843 /* hmm. we are done with the inode, and in the process of freeing
1844 * the state_owner. we keep this around to process errors
1846 switch (task
->tk_status
) {
1848 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, 0);
1849 renew_lease(server
, calldata
->timestamp
);
1850 nfs4_close_clear_stateid_flags(state
,
1851 calldata
->arg
.fmode
);
1853 case -NFS4ERR_STALE_STATEID
:
1854 case -NFS4ERR_OLD_STATEID
:
1855 case -NFS4ERR_BAD_STATEID
:
1856 case -NFS4ERR_EXPIRED
:
1857 if (calldata
->arg
.fmode
== 0)
1860 if (nfs4_async_handle_error(task
, server
, state
) == -EAGAIN
)
1861 rpc_restart_call_prepare(task
);
1863 nfs_release_seqid(calldata
->arg
.seqid
);
1864 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1867 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1869 struct nfs4_closedata
*calldata
= data
;
1870 struct nfs4_state
*state
= calldata
->state
;
1873 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1876 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1877 calldata
->arg
.fmode
= FMODE_READ
|FMODE_WRITE
;
1878 spin_lock(&state
->owner
->so_lock
);
1879 /* Calculate the change in open mode */
1880 if (state
->n_rdwr
== 0) {
1881 if (state
->n_rdonly
== 0) {
1882 call_close
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1883 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1884 calldata
->arg
.fmode
&= ~FMODE_READ
;
1886 if (state
->n_wronly
== 0) {
1887 call_close
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1888 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1889 calldata
->arg
.fmode
&= ~FMODE_WRITE
;
1892 spin_unlock(&state
->owner
->so_lock
);
1895 /* Note: exit _without_ calling nfs4_close_done */
1896 task
->tk_action
= NULL
;
1900 if (calldata
->arg
.fmode
== 0)
1901 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
];
1903 nfs_fattr_init(calldata
->res
.fattr
);
1904 calldata
->timestamp
= jiffies
;
1905 if (nfs4_setup_sequence(NFS_SERVER(calldata
->inode
),
1906 &calldata
->arg
.seq_args
, &calldata
->res
.seq_res
,
1909 rpc_call_start(task
);
1912 static const struct rpc_call_ops nfs4_close_ops
= {
1913 .rpc_call_prepare
= nfs4_close_prepare
,
1914 .rpc_call_done
= nfs4_close_done
,
1915 .rpc_release
= nfs4_free_closedata
,
1919 * It is possible for data to be read/written from a mem-mapped file
1920 * after the sys_close call (which hits the vfs layer as a flush).
1921 * This means that we can't safely call nfsv4 close on a file until
1922 * the inode is cleared. This in turn means that we are not good
1923 * NFSv4 citizens - we do not indicate to the server to update the file's
1924 * share state even when we are done with one of the three share
1925 * stateid's in the inode.
1927 * NOTE: Caller must be holding the sp->so_owner semaphore!
1929 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
, gfp_t gfp_mask
, int wait
)
1931 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1932 struct nfs4_closedata
*calldata
;
1933 struct nfs4_state_owner
*sp
= state
->owner
;
1934 struct rpc_task
*task
;
1935 struct rpc_message msg
= {
1936 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1937 .rpc_cred
= state
->owner
->so_cred
,
1939 struct rpc_task_setup task_setup_data
= {
1940 .rpc_client
= server
->client
,
1941 .rpc_message
= &msg
,
1942 .callback_ops
= &nfs4_close_ops
,
1943 .workqueue
= nfsiod_workqueue
,
1944 .flags
= RPC_TASK_ASYNC
,
1946 int status
= -ENOMEM
;
1948 calldata
= kzalloc(sizeof(*calldata
), gfp_mask
);
1949 if (calldata
== NULL
)
1951 calldata
->inode
= state
->inode
;
1952 calldata
->state
= state
;
1953 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1954 calldata
->arg
.stateid
= &state
->open_stateid
;
1955 /* Serialization for the sequence id */
1956 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
, gfp_mask
);
1957 if (calldata
->arg
.seqid
== NULL
)
1958 goto out_free_calldata
;
1959 calldata
->arg
.fmode
= 0;
1960 calldata
->arg
.bitmask
= server
->cache_consistency_bitmask
;
1961 calldata
->res
.fattr
= &calldata
->fattr
;
1962 calldata
->res
.seqid
= calldata
->arg
.seqid
;
1963 calldata
->res
.server
= server
;
1964 calldata
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
1966 calldata
->path
= *path
;
1968 msg
.rpc_argp
= &calldata
->arg
,
1969 msg
.rpc_resp
= &calldata
->res
,
1970 task_setup_data
.callback_data
= calldata
;
1971 task
= rpc_run_task(&task_setup_data
);
1973 return PTR_ERR(task
);
1976 status
= rpc_wait_for_completion_task(task
);
1982 nfs4_put_open_state(state
);
1983 nfs4_put_state_owner(sp
);
1987 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
, fmode_t fmode
)
1992 /* If the open_intent is for execute, we have an extra check to make */
1993 if (fmode
& FMODE_EXEC
) {
1994 ret
= nfs_may_open(state
->inode
,
1995 state
->owner
->so_cred
,
1996 nd
->intent
.open
.flags
);
2000 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
2001 if (!IS_ERR(filp
)) {
2002 struct nfs_open_context
*ctx
;
2003 ctx
= nfs_file_open_context(filp
);
2007 ret
= PTR_ERR(filp
);
2009 nfs4_close_sync(path
, state
, fmode
& (FMODE_READ
|FMODE_WRITE
));
2014 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
2016 struct path path
= {
2017 .mnt
= nd
->path
.mnt
,
2020 struct dentry
*parent
;
2022 struct rpc_cred
*cred
;
2023 struct nfs4_state
*state
;
2025 fmode_t fmode
= nd
->intent
.open
.flags
& (FMODE_READ
| FMODE_WRITE
| FMODE_EXEC
);
2027 if (nd
->flags
& LOOKUP_CREATE
) {
2028 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
2029 attr
.ia_valid
= ATTR_MODE
;
2030 if (!IS_POSIXACL(dir
))
2031 attr
.ia_mode
&= ~current_umask();
2034 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
2037 cred
= rpc_lookup_cred();
2039 return (struct dentry
*)cred
;
2040 parent
= dentry
->d_parent
;
2041 /* Protect against concurrent sillydeletes */
2042 nfs_block_sillyrename(parent
);
2043 state
= nfs4_do_open(dir
, &path
, fmode
, nd
->intent
.open
.flags
, &attr
, cred
);
2045 if (IS_ERR(state
)) {
2046 if (PTR_ERR(state
) == -ENOENT
) {
2047 d_add(dentry
, NULL
);
2048 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2050 nfs_unblock_sillyrename(parent
);
2051 return (struct dentry
*)state
;
2053 res
= d_add_unique(dentry
, igrab(state
->inode
));
2056 nfs_set_verifier(path
.dentry
, nfs_save_change_attribute(dir
));
2057 nfs_unblock_sillyrename(parent
);
2058 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2063 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
2065 struct path path
= {
2066 .mnt
= nd
->path
.mnt
,
2069 struct rpc_cred
*cred
;
2070 struct nfs4_state
*state
;
2071 fmode_t fmode
= openflags
& (FMODE_READ
| FMODE_WRITE
);
2073 cred
= rpc_lookup_cred();
2075 return PTR_ERR(cred
);
2076 state
= nfs4_do_open(dir
, &path
, fmode
, openflags
, NULL
, cred
);
2078 if (IS_ERR(state
)) {
2079 switch (PTR_ERR(state
)) {
2085 return PTR_ERR(state
);
2090 if (state
->inode
== dentry
->d_inode
) {
2091 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2092 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2095 nfs4_close_sync(&path
, state
, fmode
);
2101 static void nfs4_close_context(struct nfs_open_context
*ctx
, int is_sync
)
2103 if (ctx
->state
== NULL
)
2106 nfs4_close_sync(&ctx
->path
, ctx
->state
, ctx
->mode
);
2108 nfs4_close_state(&ctx
->path
, ctx
->state
, ctx
->mode
);
2111 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
2113 struct nfs4_server_caps_arg args
= {
2116 struct nfs4_server_caps_res res
= {};
2117 struct rpc_message msg
= {
2118 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
2124 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2126 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
2127 server
->caps
&= ~(NFS_CAP_ACLS
|NFS_CAP_HARDLINKS
|
2128 NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
2129 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|
2130 NFS_CAP_OWNER_GROUP
|NFS_CAP_ATIME
|
2131 NFS_CAP_CTIME
|NFS_CAP_MTIME
);
2132 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
2133 server
->caps
|= NFS_CAP_ACLS
;
2134 if (res
.has_links
!= 0)
2135 server
->caps
|= NFS_CAP_HARDLINKS
;
2136 if (res
.has_symlinks
!= 0)
2137 server
->caps
|= NFS_CAP_SYMLINKS
;
2138 if (res
.attr_bitmask
[0] & FATTR4_WORD0_FILEID
)
2139 server
->caps
|= NFS_CAP_FILEID
;
2140 if (res
.attr_bitmask
[1] & FATTR4_WORD1_MODE
)
2141 server
->caps
|= NFS_CAP_MODE
;
2142 if (res
.attr_bitmask
[1] & FATTR4_WORD1_NUMLINKS
)
2143 server
->caps
|= NFS_CAP_NLINK
;
2144 if (res
.attr_bitmask
[1] & FATTR4_WORD1_OWNER
)
2145 server
->caps
|= NFS_CAP_OWNER
;
2146 if (res
.attr_bitmask
[1] & FATTR4_WORD1_OWNER_GROUP
)
2147 server
->caps
|= NFS_CAP_OWNER_GROUP
;
2148 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_ACCESS
)
2149 server
->caps
|= NFS_CAP_ATIME
;
2150 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_METADATA
)
2151 server
->caps
|= NFS_CAP_CTIME
;
2152 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_MODIFY
)
2153 server
->caps
|= NFS_CAP_MTIME
;
2155 memcpy(server
->cache_consistency_bitmask
, res
.attr_bitmask
, sizeof(server
->cache_consistency_bitmask
));
2156 server
->cache_consistency_bitmask
[0] &= FATTR4_WORD0_CHANGE
|FATTR4_WORD0_SIZE
;
2157 server
->cache_consistency_bitmask
[1] &= FATTR4_WORD1_TIME_METADATA
|FATTR4_WORD1_TIME_MODIFY
;
2158 server
->acl_bitmask
= res
.acl_bitmask
;
2164 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
2166 struct nfs4_exception exception
= { };
2169 err
= nfs4_handle_exception(server
,
2170 _nfs4_server_capabilities(server
, fhandle
),
2172 } while (exception
.retry
);
2176 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2177 struct nfs_fsinfo
*info
)
2179 struct nfs4_lookup_root_arg args
= {
2180 .bitmask
= nfs4_fattr_bitmap
,
2182 struct nfs4_lookup_res res
= {
2184 .fattr
= info
->fattr
,
2187 struct rpc_message msg
= {
2188 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
2193 nfs_fattr_init(info
->fattr
);
2194 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2197 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2198 struct nfs_fsinfo
*info
)
2200 struct nfs4_exception exception
= { };
2203 err
= nfs4_handle_exception(server
,
2204 _nfs4_lookup_root(server
, fhandle
, info
),
2206 } while (exception
.retry
);
2211 * get the file handle for the "/" directory on the server
2213 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2214 struct nfs_fsinfo
*info
)
2218 status
= nfs4_lookup_root(server
, fhandle
, info
);
2220 status
= nfs4_server_capabilities(server
, fhandle
);
2222 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
2223 return nfs4_map_errors(status
);
2227 * Get locations and (maybe) other attributes of a referral.
2228 * Note that we'll actually follow the referral later when
2229 * we detect fsid mismatch in inode revalidation
2231 static int nfs4_get_referral(struct inode
*dir
, const struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
2233 int status
= -ENOMEM
;
2234 struct page
*page
= NULL
;
2235 struct nfs4_fs_locations
*locations
= NULL
;
2237 page
= alloc_page(GFP_KERNEL
);
2240 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
2241 if (locations
== NULL
)
2244 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
2247 /* Make sure server returned a different fsid for the referral */
2248 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
2249 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__
, name
->name
);
2254 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
2255 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
2257 fattr
->mode
= S_IFDIR
;
2258 memset(fhandle
, 0, sizeof(struct nfs_fh
));
2267 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2269 struct nfs4_getattr_arg args
= {
2271 .bitmask
= server
->attr_bitmask
,
2273 struct nfs4_getattr_res res
= {
2277 struct rpc_message msg
= {
2278 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
2283 nfs_fattr_init(fattr
);
2284 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2287 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2289 struct nfs4_exception exception
= { };
2292 err
= nfs4_handle_exception(server
,
2293 _nfs4_proc_getattr(server
, fhandle
, fattr
),
2295 } while (exception
.retry
);
2300 * The file is not closed if it is opened due to the a request to change
2301 * the size of the file. The open call will not be needed once the
2302 * VFS layer lookup-intents are implemented.
2304 * Close is called when the inode is destroyed.
2305 * If we haven't opened the file for O_WRONLY, we
2306 * need to in the size_change case to obtain a stateid.
2309 * Because OPEN is always done by name in nfsv4, it is
2310 * possible that we opened a different file by the same
2311 * name. We can recognize this race condition, but we
2312 * can't do anything about it besides returning an error.
2314 * This will be fixed with VFS changes (lookup-intent).
2317 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
2318 struct iattr
*sattr
)
2320 struct inode
*inode
= dentry
->d_inode
;
2321 struct rpc_cred
*cred
= NULL
;
2322 struct nfs4_state
*state
= NULL
;
2325 nfs_fattr_init(fattr
);
2327 /* Search for an existing open(O_WRITE) file */
2328 if (sattr
->ia_valid
& ATTR_FILE
) {
2329 struct nfs_open_context
*ctx
;
2331 ctx
= nfs_file_open_context(sattr
->ia_file
);
2338 status
= nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
);
2340 nfs_setattr_update_inode(inode
, sattr
);
2344 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, const struct nfs_fh
*dirfh
,
2345 const struct qstr
*name
, struct nfs_fh
*fhandle
,
2346 struct nfs_fattr
*fattr
)
2349 struct nfs4_lookup_arg args
= {
2350 .bitmask
= server
->attr_bitmask
,
2354 struct nfs4_lookup_res res
= {
2359 struct rpc_message msg
= {
2360 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
2365 nfs_fattr_init(fattr
);
2367 dprintk("NFS call lookupfh %s\n", name
->name
);
2368 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2369 dprintk("NFS reply lookupfh: %d\n", status
);
2373 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
2374 struct qstr
*name
, struct nfs_fh
*fhandle
,
2375 struct nfs_fattr
*fattr
)
2377 struct nfs4_exception exception
= { };
2380 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
2382 if (err
== -NFS4ERR_MOVED
) {
2386 err
= nfs4_handle_exception(server
, err
, &exception
);
2387 } while (exception
.retry
);
2391 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
,
2392 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2396 dprintk("NFS call lookup %s\n", name
->name
);
2397 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
2398 if (status
== -NFS4ERR_MOVED
)
2399 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
2400 dprintk("NFS reply lookup: %d\n", status
);
2404 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2406 struct nfs4_exception exception
= { };
2409 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2410 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
2412 } while (exception
.retry
);
2416 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
2418 struct nfs_server
*server
= NFS_SERVER(inode
);
2419 struct nfs4_accessargs args
= {
2420 .fh
= NFS_FH(inode
),
2421 .bitmask
= server
->attr_bitmask
,
2423 struct nfs4_accessres res
= {
2426 struct rpc_message msg
= {
2427 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
2430 .rpc_cred
= entry
->cred
,
2432 int mode
= entry
->mask
;
2436 * Determine which access bits we want to ask for...
2438 if (mode
& MAY_READ
)
2439 args
.access
|= NFS4_ACCESS_READ
;
2440 if (S_ISDIR(inode
->i_mode
)) {
2441 if (mode
& MAY_WRITE
)
2442 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
2443 if (mode
& MAY_EXEC
)
2444 args
.access
|= NFS4_ACCESS_LOOKUP
;
2446 if (mode
& MAY_WRITE
)
2447 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
2448 if (mode
& MAY_EXEC
)
2449 args
.access
|= NFS4_ACCESS_EXECUTE
;
2452 res
.fattr
= nfs_alloc_fattr();
2453 if (res
.fattr
== NULL
)
2456 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2459 if (res
.access
& NFS4_ACCESS_READ
)
2460 entry
->mask
|= MAY_READ
;
2461 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
2462 entry
->mask
|= MAY_WRITE
;
2463 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
2464 entry
->mask
|= MAY_EXEC
;
2465 nfs_refresh_inode(inode
, res
.fattr
);
2467 nfs_free_fattr(res
.fattr
);
2471 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
2473 struct nfs4_exception exception
= { };
2476 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2477 _nfs4_proc_access(inode
, entry
),
2479 } while (exception
.retry
);
2484 * TODO: For the time being, we don't try to get any attributes
2485 * along with any of the zero-copy operations READ, READDIR,
2488 * In the case of the first three, we want to put the GETATTR
2489 * after the read-type operation -- this is because it is hard
2490 * to predict the length of a GETATTR response in v4, and thus
2491 * align the READ data correctly. This means that the GETATTR
2492 * may end up partially falling into the page cache, and we should
2493 * shift it into the 'tail' of the xdr_buf before processing.
2494 * To do this efficiently, we need to know the total length
2495 * of data received, which doesn't seem to be available outside
2498 * In the case of WRITE, we also want to put the GETATTR after
2499 * the operation -- in this case because we want to make sure
2500 * we get the post-operation mtime and size. This means that
2501 * we can't use xdr_encode_pages() as written: we need a variant
2502 * of it which would leave room in the 'tail' iovec.
2504 * Both of these changes to the XDR layer would in fact be quite
2505 * minor, but I decided to leave them for a subsequent patch.
2507 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2508 unsigned int pgbase
, unsigned int pglen
)
2510 struct nfs4_readlink args
= {
2511 .fh
= NFS_FH(inode
),
2516 struct nfs4_readlink_res res
;
2517 struct rpc_message msg
= {
2518 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
2523 return nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
2526 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2527 unsigned int pgbase
, unsigned int pglen
)
2529 struct nfs4_exception exception
= { };
2532 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2533 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
2535 } while (exception
.retry
);
2541 * We will need to arrange for the VFS layer to provide an atomic open.
2542 * Until then, this create/open method is prone to inefficiency and race
2543 * conditions due to the lookup, create, and open VFS calls from sys_open()
2544 * placed on the wire.
2546 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2547 * The file will be opened again in the subsequent VFS open call
2548 * (nfs4_proc_file_open).
2550 * The open for read will just hang around to be used by any process that
2551 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2555 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
2556 int flags
, struct nameidata
*nd
)
2558 struct path path
= {
2559 .mnt
= nd
->path
.mnt
,
2562 struct nfs4_state
*state
;
2563 struct rpc_cred
*cred
;
2564 fmode_t fmode
= flags
& (FMODE_READ
| FMODE_WRITE
);
2567 cred
= rpc_lookup_cred();
2569 status
= PTR_ERR(cred
);
2572 state
= nfs4_do_open(dir
, &path
, fmode
, flags
, sattr
, cred
);
2574 if (IS_ERR(state
)) {
2575 status
= PTR_ERR(state
);
2578 d_add(dentry
, igrab(state
->inode
));
2579 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2580 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
2581 status
= nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2583 nfs4_close_sync(&path
, state
, fmode
);
2590 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2592 struct nfs_server
*server
= NFS_SERVER(dir
);
2593 struct nfs_removeargs args
= {
2595 .name
.len
= name
->len
,
2596 .name
.name
= name
->name
,
2597 .bitmask
= server
->attr_bitmask
,
2599 struct nfs_removeres res
= {
2602 struct rpc_message msg
= {
2603 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
2607 int status
= -ENOMEM
;
2609 res
.dir_attr
= nfs_alloc_fattr();
2610 if (res
.dir_attr
== NULL
)
2613 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 1);
2615 update_changeattr(dir
, &res
.cinfo
);
2616 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2618 nfs_free_fattr(res
.dir_attr
);
2623 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2625 struct nfs4_exception exception
= { };
2628 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2629 _nfs4_proc_remove(dir
, name
),
2631 } while (exception
.retry
);
2635 static void nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct inode
*dir
)
2637 struct nfs_server
*server
= NFS_SERVER(dir
);
2638 struct nfs_removeargs
*args
= msg
->rpc_argp
;
2639 struct nfs_removeres
*res
= msg
->rpc_resp
;
2641 args
->bitmask
= server
->cache_consistency_bitmask
;
2642 res
->server
= server
;
2643 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
2646 static int nfs4_proc_unlink_done(struct rpc_task
*task
, struct inode
*dir
)
2648 struct nfs_removeres
*res
= task
->tk_msg
.rpc_resp
;
2650 nfs4_sequence_done(res
->server
, &res
->seq_res
, task
->tk_status
);
2651 if (nfs4_async_handle_error(task
, res
->server
, NULL
) == -EAGAIN
)
2653 update_changeattr(dir
, &res
->cinfo
);
2654 nfs_post_op_update_inode(dir
, res
->dir_attr
);
2658 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2659 struct inode
*new_dir
, struct qstr
*new_name
)
2661 struct nfs_server
*server
= NFS_SERVER(old_dir
);
2662 struct nfs4_rename_arg arg
= {
2663 .old_dir
= NFS_FH(old_dir
),
2664 .new_dir
= NFS_FH(new_dir
),
2665 .old_name
= old_name
,
2666 .new_name
= new_name
,
2667 .bitmask
= server
->attr_bitmask
,
2669 struct nfs4_rename_res res
= {
2672 struct rpc_message msg
= {
2673 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2677 int status
= -ENOMEM
;
2679 res
.old_fattr
= nfs_alloc_fattr();
2680 res
.new_fattr
= nfs_alloc_fattr();
2681 if (res
.old_fattr
== NULL
|| res
.new_fattr
== NULL
)
2684 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2686 update_changeattr(old_dir
, &res
.old_cinfo
);
2687 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2688 update_changeattr(new_dir
, &res
.new_cinfo
);
2689 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2692 nfs_free_fattr(res
.new_fattr
);
2693 nfs_free_fattr(res
.old_fattr
);
2697 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2698 struct inode
*new_dir
, struct qstr
*new_name
)
2700 struct nfs4_exception exception
= { };
2703 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2704 _nfs4_proc_rename(old_dir
, old_name
,
2707 } while (exception
.retry
);
2711 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2713 struct nfs_server
*server
= NFS_SERVER(inode
);
2714 struct nfs4_link_arg arg
= {
2715 .fh
= NFS_FH(inode
),
2716 .dir_fh
= NFS_FH(dir
),
2718 .bitmask
= server
->attr_bitmask
,
2720 struct nfs4_link_res res
= {
2723 struct rpc_message msg
= {
2724 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2728 int status
= -ENOMEM
;
2730 res
.fattr
= nfs_alloc_fattr();
2731 res
.dir_attr
= nfs_alloc_fattr();
2732 if (res
.fattr
== NULL
|| res
.dir_attr
== NULL
)
2735 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2737 update_changeattr(dir
, &res
.cinfo
);
2738 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2739 nfs_post_op_update_inode(inode
, res
.fattr
);
2742 nfs_free_fattr(res
.dir_attr
);
2743 nfs_free_fattr(res
.fattr
);
2747 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2749 struct nfs4_exception exception
= { };
2752 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2753 _nfs4_proc_link(inode
, dir
, name
),
2755 } while (exception
.retry
);
2759 struct nfs4_createdata
{
2760 struct rpc_message msg
;
2761 struct nfs4_create_arg arg
;
2762 struct nfs4_create_res res
;
2764 struct nfs_fattr fattr
;
2765 struct nfs_fattr dir_fattr
;
2768 static struct nfs4_createdata
*nfs4_alloc_createdata(struct inode
*dir
,
2769 struct qstr
*name
, struct iattr
*sattr
, u32 ftype
)
2771 struct nfs4_createdata
*data
;
2773 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
2775 struct nfs_server
*server
= NFS_SERVER(dir
);
2777 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
];
2778 data
->msg
.rpc_argp
= &data
->arg
;
2779 data
->msg
.rpc_resp
= &data
->res
;
2780 data
->arg
.dir_fh
= NFS_FH(dir
);
2781 data
->arg
.server
= server
;
2782 data
->arg
.name
= name
;
2783 data
->arg
.attrs
= sattr
;
2784 data
->arg
.ftype
= ftype
;
2785 data
->arg
.bitmask
= server
->attr_bitmask
;
2786 data
->res
.server
= server
;
2787 data
->res
.fh
= &data
->fh
;
2788 data
->res
.fattr
= &data
->fattr
;
2789 data
->res
.dir_fattr
= &data
->dir_fattr
;
2790 nfs_fattr_init(data
->res
.fattr
);
2791 nfs_fattr_init(data
->res
.dir_fattr
);
2796 static int nfs4_do_create(struct inode
*dir
, struct dentry
*dentry
, struct nfs4_createdata
*data
)
2798 int status
= nfs4_call_sync(NFS_SERVER(dir
), &data
->msg
,
2799 &data
->arg
, &data
->res
, 1);
2801 update_changeattr(dir
, &data
->res
.dir_cinfo
);
2802 nfs_post_op_update_inode(dir
, data
->res
.dir_fattr
);
2803 status
= nfs_instantiate(dentry
, data
->res
.fh
, data
->res
.fattr
);
2808 static void nfs4_free_createdata(struct nfs4_createdata
*data
)
2813 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2814 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2816 struct nfs4_createdata
*data
;
2817 int status
= -ENAMETOOLONG
;
2819 if (len
> NFS4_MAXPATHLEN
)
2823 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4LNK
);
2827 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
];
2828 data
->arg
.u
.symlink
.pages
= &page
;
2829 data
->arg
.u
.symlink
.len
= len
;
2831 status
= nfs4_do_create(dir
, dentry
, data
);
2833 nfs4_free_createdata(data
);
2838 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2839 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2841 struct nfs4_exception exception
= { };
2844 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2845 _nfs4_proc_symlink(dir
, dentry
, page
,
2848 } while (exception
.retry
);
2852 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2853 struct iattr
*sattr
)
2855 struct nfs4_createdata
*data
;
2856 int status
= -ENOMEM
;
2858 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4DIR
);
2862 status
= nfs4_do_create(dir
, dentry
, data
);
2864 nfs4_free_createdata(data
);
2869 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2870 struct iattr
*sattr
)
2872 struct nfs4_exception exception
= { };
2875 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2876 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2878 } while (exception
.retry
);
2882 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2883 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2885 struct inode
*dir
= dentry
->d_inode
;
2886 struct nfs4_readdir_arg args
= {
2891 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
2893 struct nfs4_readdir_res res
;
2894 struct rpc_message msg
= {
2895 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2902 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__
,
2903 dentry
->d_parent
->d_name
.name
,
2904 dentry
->d_name
.name
,
2905 (unsigned long long)cookie
);
2906 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2907 res
.pgbase
= args
.pgbase
;
2908 status
= nfs4_call_sync(NFS_SERVER(dir
), &msg
, &args
, &res
, 0);
2910 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2912 nfs_invalidate_atime(dir
);
2914 dprintk("%s: returns %d\n", __func__
, status
);
2918 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2919 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2921 struct nfs4_exception exception
= { };
2924 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2925 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2928 } while (exception
.retry
);
2932 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2933 struct iattr
*sattr
, dev_t rdev
)
2935 struct nfs4_createdata
*data
;
2936 int mode
= sattr
->ia_mode
;
2937 int status
= -ENOMEM
;
2939 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2940 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2942 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4SOCK
);
2947 data
->arg
.ftype
= NF4FIFO
;
2948 else if (S_ISBLK(mode
)) {
2949 data
->arg
.ftype
= NF4BLK
;
2950 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2951 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2953 else if (S_ISCHR(mode
)) {
2954 data
->arg
.ftype
= NF4CHR
;
2955 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2956 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2959 status
= nfs4_do_create(dir
, dentry
, data
);
2961 nfs4_free_createdata(data
);
2966 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2967 struct iattr
*sattr
, dev_t rdev
)
2969 struct nfs4_exception exception
= { };
2972 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2973 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2975 } while (exception
.retry
);
2979 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2980 struct nfs_fsstat
*fsstat
)
2982 struct nfs4_statfs_arg args
= {
2984 .bitmask
= server
->attr_bitmask
,
2986 struct nfs4_statfs_res res
= {
2989 struct rpc_message msg
= {
2990 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2995 nfs_fattr_init(fsstat
->fattr
);
2996 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2999 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
3001 struct nfs4_exception exception
= { };
3004 err
= nfs4_handle_exception(server
,
3005 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
3007 } while (exception
.retry
);
3011 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3012 struct nfs_fsinfo
*fsinfo
)
3014 struct nfs4_fsinfo_arg args
= {
3016 .bitmask
= server
->attr_bitmask
,
3018 struct nfs4_fsinfo_res res
= {
3021 struct rpc_message msg
= {
3022 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
3027 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
3030 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
3032 struct nfs4_exception exception
= { };
3036 err
= nfs4_handle_exception(server
,
3037 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
3039 } while (exception
.retry
);
3043 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
3045 nfs_fattr_init(fsinfo
->fattr
);
3046 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
3049 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3050 struct nfs_pathconf
*pathconf
)
3052 struct nfs4_pathconf_arg args
= {
3054 .bitmask
= server
->attr_bitmask
,
3056 struct nfs4_pathconf_res res
= {
3057 .pathconf
= pathconf
,
3059 struct rpc_message msg
= {
3060 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
3065 /* None of the pathconf attributes are mandatory to implement */
3066 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
3067 memset(pathconf
, 0, sizeof(*pathconf
));
3071 nfs_fattr_init(pathconf
->fattr
);
3072 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
3075 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3076 struct nfs_pathconf
*pathconf
)
3078 struct nfs4_exception exception
= { };
3082 err
= nfs4_handle_exception(server
,
3083 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
3085 } while (exception
.retry
);
3089 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
3091 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
3093 dprintk("--> %s\n", __func__
);
3095 nfs4_sequence_done(server
, &data
->res
.seq_res
, task
->tk_status
);
3097 if (nfs4_async_handle_error(task
, server
, data
->args
.context
->state
) == -EAGAIN
) {
3098 nfs_restart_rpc(task
, server
->nfs_client
);
3102 nfs_invalidate_atime(data
->inode
);
3103 if (task
->tk_status
> 0)
3104 renew_lease(server
, data
->timestamp
);
3108 static void nfs4_proc_read_setup(struct nfs_read_data
*data
, struct rpc_message
*msg
)
3110 data
->timestamp
= jiffies
;
3111 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
];
3114 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
3116 struct inode
*inode
= data
->inode
;
3118 nfs4_sequence_done(NFS_SERVER(inode
), &data
->res
.seq_res
,
3121 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), data
->args
.context
->state
) == -EAGAIN
) {
3122 nfs_restart_rpc(task
, NFS_SERVER(inode
)->nfs_client
);
3125 if (task
->tk_status
>= 0) {
3126 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
3127 nfs_post_op_update_inode_force_wcc(inode
, data
->res
.fattr
);
3132 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
3134 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
3136 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
3137 data
->res
.server
= server
;
3138 data
->timestamp
= jiffies
;
3140 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
];
3143 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
3145 struct inode
*inode
= data
->inode
;
3147 nfs4_sequence_done(NFS_SERVER(inode
), &data
->res
.seq_res
,
3149 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), NULL
) == -EAGAIN
) {
3150 nfs_restart_rpc(task
, NFS_SERVER(inode
)->nfs_client
);
3153 nfs_refresh_inode(inode
, data
->res
.fattr
);
3157 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
3159 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
3161 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
3162 data
->res
.server
= server
;
3163 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
];
3166 struct nfs4_renewdata
{
3167 struct nfs_client
*client
;
3168 unsigned long timestamp
;
3172 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3173 * standalone procedure for queueing an asynchronous RENEW.
3175 static void nfs4_renew_release(void *calldata
)
3177 struct nfs4_renewdata
*data
= calldata
;
3178 struct nfs_client
*clp
= data
->client
;
3180 if (atomic_read(&clp
->cl_count
) > 1)
3181 nfs4_schedule_state_renewal(clp
);
3182 nfs_put_client(clp
);
3186 static void nfs4_renew_done(struct rpc_task
*task
, void *calldata
)
3188 struct nfs4_renewdata
*data
= calldata
;
3189 struct nfs_client
*clp
= data
->client
;
3190 unsigned long timestamp
= data
->timestamp
;
3192 if (task
->tk_status
< 0) {
3193 /* Unless we're shutting down, schedule state recovery! */
3194 if (test_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
) != 0)
3195 nfs4_schedule_state_recovery(clp
);
3198 spin_lock(&clp
->cl_lock
);
3199 if (time_before(clp
->cl_last_renewal
,timestamp
))
3200 clp
->cl_last_renewal
= timestamp
;
3201 spin_unlock(&clp
->cl_lock
);
3204 static const struct rpc_call_ops nfs4_renew_ops
= {
3205 .rpc_call_done
= nfs4_renew_done
,
3206 .rpc_release
= nfs4_renew_release
,
3209 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3211 struct rpc_message msg
= {
3212 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
3216 struct nfs4_renewdata
*data
;
3218 if (!atomic_inc_not_zero(&clp
->cl_count
))
3220 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3224 data
->timestamp
= jiffies
;
3225 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
3226 &nfs4_renew_ops
, data
);
3229 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3231 struct rpc_message msg
= {
3232 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
3236 unsigned long now
= jiffies
;
3239 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3242 spin_lock(&clp
->cl_lock
);
3243 if (time_before(clp
->cl_last_renewal
,now
))
3244 clp
->cl_last_renewal
= now
;
3245 spin_unlock(&clp
->cl_lock
);
3249 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
3251 return (server
->caps
& NFS_CAP_ACLS
)
3252 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
3253 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
3256 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3257 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3260 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3262 static void buf_to_pages(const void *buf
, size_t buflen
,
3263 struct page
**pages
, unsigned int *pgbase
)
3265 const void *p
= buf
;
3267 *pgbase
= offset_in_page(buf
);
3269 while (p
< buf
+ buflen
) {
3270 *(pages
++) = virt_to_page(p
);
3271 p
+= PAGE_CACHE_SIZE
;
3275 struct nfs4_cached_acl
{
3281 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
3283 struct nfs_inode
*nfsi
= NFS_I(inode
);
3285 spin_lock(&inode
->i_lock
);
3286 kfree(nfsi
->nfs4_acl
);
3287 nfsi
->nfs4_acl
= acl
;
3288 spin_unlock(&inode
->i_lock
);
3291 static void nfs4_zap_acl_attr(struct inode
*inode
)
3293 nfs4_set_cached_acl(inode
, NULL
);
3296 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
3298 struct nfs_inode
*nfsi
= NFS_I(inode
);
3299 struct nfs4_cached_acl
*acl
;
3302 spin_lock(&inode
->i_lock
);
3303 acl
= nfsi
->nfs4_acl
;
3306 if (buf
== NULL
) /* user is just asking for length */
3308 if (acl
->cached
== 0)
3310 ret
= -ERANGE
; /* see getxattr(2) man page */
3311 if (acl
->len
> buflen
)
3313 memcpy(buf
, acl
->data
, acl
->len
);
3317 spin_unlock(&inode
->i_lock
);
3321 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
3323 struct nfs4_cached_acl
*acl
;
3325 if (buf
&& acl_len
<= PAGE_SIZE
) {
3326 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
3330 memcpy(acl
->data
, buf
, acl_len
);
3332 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
3339 nfs4_set_cached_acl(inode
, acl
);
3342 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3344 struct page
*pages
[NFS4ACL_MAXPAGES
];
3345 struct nfs_getaclargs args
= {
3346 .fh
= NFS_FH(inode
),
3350 struct nfs_getaclres res
= {
3354 struct rpc_message msg
= {
3355 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
3359 struct page
*localpage
= NULL
;
3362 if (buflen
< PAGE_SIZE
) {
3363 /* As long as we're doing a round trip to the server anyway,
3364 * let's be prepared for a page of acl data. */
3365 localpage
= alloc_page(GFP_KERNEL
);
3366 resp_buf
= page_address(localpage
);
3367 if (localpage
== NULL
)
3369 args
.acl_pages
[0] = localpage
;
3370 args
.acl_pgbase
= 0;
3371 args
.acl_len
= PAGE_SIZE
;
3374 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
3376 ret
= nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
3379 if (res
.acl_len
> args
.acl_len
)
3380 nfs4_write_cached_acl(inode
, NULL
, res
.acl_len
);
3382 nfs4_write_cached_acl(inode
, resp_buf
, res
.acl_len
);
3385 if (res
.acl_len
> buflen
)
3388 memcpy(buf
, resp_buf
, res
.acl_len
);
3393 __free_page(localpage
);
3397 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3399 struct nfs4_exception exception
= { };
3402 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
3405 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
3406 } while (exception
.retry
);
3410 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
3412 struct nfs_server
*server
= NFS_SERVER(inode
);
3415 if (!nfs4_server_supports_acls(server
))
3417 ret
= nfs_revalidate_inode(server
, inode
);
3420 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
3423 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
3426 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3428 struct nfs_server
*server
= NFS_SERVER(inode
);
3429 struct page
*pages
[NFS4ACL_MAXPAGES
];
3430 struct nfs_setaclargs arg
= {
3431 .fh
= NFS_FH(inode
),
3435 struct nfs_setaclres res
;
3436 struct rpc_message msg
= {
3437 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
3443 if (!nfs4_server_supports_acls(server
))
3445 nfs_inode_return_delegation(inode
);
3446 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
3447 ret
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
3448 nfs_access_zap_cache(inode
);
3449 nfs_zap_acl_cache(inode
);
3453 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3455 struct nfs4_exception exception
= { };
3458 err
= nfs4_handle_exception(NFS_SERVER(inode
),
3459 __nfs4_proc_set_acl(inode
, buf
, buflen
),
3461 } while (exception
.retry
);
3466 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs4_state
*state
)
3468 struct nfs_client
*clp
= server
->nfs_client
;
3470 if (task
->tk_status
>= 0)
3472 switch(task
->tk_status
) {
3473 case -NFS4ERR_ADMIN_REVOKED
:
3474 case -NFS4ERR_BAD_STATEID
:
3475 case -NFS4ERR_OPENMODE
:
3478 nfs4_state_mark_reclaim_nograce(clp
, state
);
3479 goto do_state_recovery
;
3480 case -NFS4ERR_STALE_STATEID
:
3483 nfs4_state_mark_reclaim_reboot(clp
, state
);
3484 case -NFS4ERR_STALE_CLIENTID
:
3485 case -NFS4ERR_EXPIRED
:
3486 goto do_state_recovery
;
3487 #if defined(CONFIG_NFS_V4_1)
3488 case -NFS4ERR_BADSESSION
:
3489 case -NFS4ERR_BADSLOT
:
3490 case -NFS4ERR_BAD_HIGH_SLOT
:
3491 case -NFS4ERR_DEADSESSION
:
3492 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
3493 case -NFS4ERR_SEQ_FALSE_RETRY
:
3494 case -NFS4ERR_SEQ_MISORDERED
:
3495 dprintk("%s ERROR %d, Reset session\n", __func__
,
3497 nfs4_schedule_state_recovery(clp
);
3498 task
->tk_status
= 0;
3500 #endif /* CONFIG_NFS_V4_1 */
3501 case -NFS4ERR_DELAY
:
3502 nfs_inc_server_stats(server
, NFSIOS_DELAY
);
3503 case -NFS4ERR_GRACE
:
3505 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
3506 task
->tk_status
= 0;
3508 case -NFS4ERR_OLD_STATEID
:
3509 task
->tk_status
= 0;
3512 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
3515 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
);
3516 nfs4_schedule_state_recovery(clp
);
3517 if (test_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) == 0)
3518 rpc_wake_up_queued_task(&clp
->cl_rpcwaitq
, task
);
3519 task
->tk_status
= 0;
3523 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
,
3524 unsigned short port
, struct rpc_cred
*cred
,
3525 struct nfs4_setclientid_res
*res
)
3527 nfs4_verifier sc_verifier
;
3528 struct nfs4_setclientid setclientid
= {
3529 .sc_verifier
= &sc_verifier
,
3532 struct rpc_message msg
= {
3533 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
3534 .rpc_argp
= &setclientid
,
3542 p
= (__be32
*)sc_verifier
.data
;
3543 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
3544 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
3547 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
3548 sizeof(setclientid
.sc_name
), "%s/%s %s %s %u",
3550 rpc_peeraddr2str(clp
->cl_rpcclient
,
3552 rpc_peeraddr2str(clp
->cl_rpcclient
,
3554 clp
->cl_rpcclient
->cl_auth
->au_ops
->au_name
,
3555 clp
->cl_id_uniquifier
);
3556 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
3557 sizeof(setclientid
.sc_netid
),
3558 rpc_peeraddr2str(clp
->cl_rpcclient
,
3559 RPC_DISPLAY_NETID
));
3560 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
3561 sizeof(setclientid
.sc_uaddr
), "%s.%u.%u",
3562 clp
->cl_ipaddr
, port
>> 8, port
& 255);
3564 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3565 if (status
!= -NFS4ERR_CLID_INUSE
)
3570 ssleep(clp
->cl_lease_time
+ 1);
3572 if (++clp
->cl_id_uniquifier
== 0)
3578 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
,
3579 struct nfs4_setclientid_res
*arg
,
3580 struct rpc_cred
*cred
)
3582 struct nfs_fsinfo fsinfo
;
3583 struct rpc_message msg
= {
3584 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
3586 .rpc_resp
= &fsinfo
,
3593 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3595 spin_lock(&clp
->cl_lock
);
3596 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
3597 clp
->cl_last_renewal
= now
;
3598 spin_unlock(&clp
->cl_lock
);
3603 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
,
3604 struct nfs4_setclientid_res
*arg
,
3605 struct rpc_cred
*cred
)
3610 err
= _nfs4_proc_setclientid_confirm(clp
, arg
, cred
);
3614 case -NFS4ERR_RESOURCE
:
3615 /* The IBM lawyers misread another document! */
3616 case -NFS4ERR_DELAY
:
3618 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
3624 struct nfs4_delegreturndata
{
3625 struct nfs4_delegreturnargs args
;
3626 struct nfs4_delegreturnres res
;
3628 nfs4_stateid stateid
;
3629 unsigned long timestamp
;
3630 struct nfs_fattr fattr
;
3634 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3636 struct nfs4_delegreturndata
*data
= calldata
;
3638 nfs4_sequence_done(data
->res
.server
, &data
->res
.seq_res
,
3641 switch (task
->tk_status
) {
3642 case -NFS4ERR_STALE_STATEID
:
3643 case -NFS4ERR_EXPIRED
:
3645 renew_lease(data
->res
.server
, data
->timestamp
);
3648 if (nfs4_async_handle_error(task
, data
->res
.server
, NULL
) ==
3650 nfs_restart_rpc(task
, data
->res
.server
->nfs_client
);
3654 data
->rpc_status
= task
->tk_status
;
3657 static void nfs4_delegreturn_release(void *calldata
)
3662 #if defined(CONFIG_NFS_V4_1)
3663 static void nfs4_delegreturn_prepare(struct rpc_task
*task
, void *data
)
3665 struct nfs4_delegreturndata
*d_data
;
3667 d_data
= (struct nfs4_delegreturndata
*)data
;
3669 if (nfs4_setup_sequence(d_data
->res
.server
,
3670 &d_data
->args
.seq_args
,
3671 &d_data
->res
.seq_res
, 1, task
))
3673 rpc_call_start(task
);
3675 #endif /* CONFIG_NFS_V4_1 */
3677 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3678 #if defined(CONFIG_NFS_V4_1)
3679 .rpc_call_prepare
= nfs4_delegreturn_prepare
,
3680 #endif /* CONFIG_NFS_V4_1 */
3681 .rpc_call_done
= nfs4_delegreturn_done
,
3682 .rpc_release
= nfs4_delegreturn_release
,
3685 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3687 struct nfs4_delegreturndata
*data
;
3688 struct nfs_server
*server
= NFS_SERVER(inode
);
3689 struct rpc_task
*task
;
3690 struct rpc_message msg
= {
3691 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3694 struct rpc_task_setup task_setup_data
= {
3695 .rpc_client
= server
->client
,
3696 .rpc_message
= &msg
,
3697 .callback_ops
= &nfs4_delegreturn_ops
,
3698 .flags
= RPC_TASK_ASYNC
,
3702 data
= kzalloc(sizeof(*data
), GFP_NOFS
);
3705 data
->args
.fhandle
= &data
->fh
;
3706 data
->args
.stateid
= &data
->stateid
;
3707 data
->args
.bitmask
= server
->attr_bitmask
;
3708 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3709 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3710 data
->res
.fattr
= &data
->fattr
;
3711 data
->res
.server
= server
;
3712 data
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3713 nfs_fattr_init(data
->res
.fattr
);
3714 data
->timestamp
= jiffies
;
3715 data
->rpc_status
= 0;
3717 task_setup_data
.callback_data
= data
;
3718 msg
.rpc_argp
= &data
->args
,
3719 msg
.rpc_resp
= &data
->res
,
3720 task
= rpc_run_task(&task_setup_data
);
3722 return PTR_ERR(task
);
3725 status
= nfs4_wait_for_completion_rpc_task(task
);
3728 status
= data
->rpc_status
;
3731 nfs_refresh_inode(inode
, &data
->fattr
);
3737 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3739 struct nfs_server
*server
= NFS_SERVER(inode
);
3740 struct nfs4_exception exception
= { };
3743 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
, issync
);
3745 case -NFS4ERR_STALE_STATEID
:
3746 case -NFS4ERR_EXPIRED
:
3750 err
= nfs4_handle_exception(server
, err
, &exception
);
3751 } while (exception
.retry
);
3755 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3756 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3759 * sleep, with exponential backoff, and retry the LOCK operation.
3761 static unsigned long
3762 nfs4_set_lock_task_retry(unsigned long timeout
)
3764 schedule_timeout_killable(timeout
);
3766 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3767 return NFS4_LOCK_MAXTIMEOUT
;
3771 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3773 struct inode
*inode
= state
->inode
;
3774 struct nfs_server
*server
= NFS_SERVER(inode
);
3775 struct nfs_client
*clp
= server
->nfs_client
;
3776 struct nfs_lockt_args arg
= {
3777 .fh
= NFS_FH(inode
),
3780 struct nfs_lockt_res res
= {
3783 struct rpc_message msg
= {
3784 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3787 .rpc_cred
= state
->owner
->so_cred
,
3789 struct nfs4_lock_state
*lsp
;
3792 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3793 status
= nfs4_set_lock_state(state
, request
);
3796 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3797 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3798 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
3801 request
->fl_type
= F_UNLCK
;
3803 case -NFS4ERR_DENIED
:
3806 request
->fl_ops
->fl_release_private(request
);
3811 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3813 struct nfs4_exception exception
= { };
3817 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3818 _nfs4_proc_getlk(state
, cmd
, request
),
3820 } while (exception
.retry
);
3824 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3827 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3829 res
= posix_lock_file_wait(file
, fl
);
3832 res
= flock_lock_file_wait(file
, fl
);
3840 struct nfs4_unlockdata
{
3841 struct nfs_locku_args arg
;
3842 struct nfs_locku_res res
;
3843 struct nfs4_lock_state
*lsp
;
3844 struct nfs_open_context
*ctx
;
3845 struct file_lock fl
;
3846 const struct nfs_server
*server
;
3847 unsigned long timestamp
;
3850 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3851 struct nfs_open_context
*ctx
,
3852 struct nfs4_lock_state
*lsp
,
3853 struct nfs_seqid
*seqid
)
3855 struct nfs4_unlockdata
*p
;
3856 struct inode
*inode
= lsp
->ls_state
->inode
;
3858 p
= kzalloc(sizeof(*p
), GFP_NOFS
);
3861 p
->arg
.fh
= NFS_FH(inode
);
3863 p
->arg
.seqid
= seqid
;
3864 p
->res
.seqid
= seqid
;
3865 p
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3866 p
->arg
.stateid
= &lsp
->ls_stateid
;
3868 atomic_inc(&lsp
->ls_count
);
3869 /* Ensure we don't close file until we're done freeing locks! */
3870 p
->ctx
= get_nfs_open_context(ctx
);
3871 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3872 p
->server
= NFS_SERVER(inode
);
3876 static void nfs4_locku_release_calldata(void *data
)
3878 struct nfs4_unlockdata
*calldata
= data
;
3879 nfs_free_seqid(calldata
->arg
.seqid
);
3880 nfs4_put_lock_state(calldata
->lsp
);
3881 put_nfs_open_context(calldata
->ctx
);
3885 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3887 struct nfs4_unlockdata
*calldata
= data
;
3889 nfs4_sequence_done(calldata
->server
, &calldata
->res
.seq_res
,
3891 if (RPC_ASSASSINATED(task
))
3893 switch (task
->tk_status
) {
3895 memcpy(calldata
->lsp
->ls_stateid
.data
,
3896 calldata
->res
.stateid
.data
,
3897 sizeof(calldata
->lsp
->ls_stateid
.data
));
3898 renew_lease(calldata
->server
, calldata
->timestamp
);
3900 case -NFS4ERR_BAD_STATEID
:
3901 case -NFS4ERR_OLD_STATEID
:
3902 case -NFS4ERR_STALE_STATEID
:
3903 case -NFS4ERR_EXPIRED
:
3906 if (nfs4_async_handle_error(task
, calldata
->server
, NULL
) == -EAGAIN
)
3907 nfs_restart_rpc(task
,
3908 calldata
->server
->nfs_client
);
3912 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3914 struct nfs4_unlockdata
*calldata
= data
;
3916 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3918 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3919 /* Note: exit _without_ running nfs4_locku_done */
3920 task
->tk_action
= NULL
;
3923 calldata
->timestamp
= jiffies
;
3924 if (nfs4_setup_sequence(calldata
->server
,
3925 &calldata
->arg
.seq_args
,
3926 &calldata
->res
.seq_res
, 1, task
))
3928 rpc_call_start(task
);
3931 static const struct rpc_call_ops nfs4_locku_ops
= {
3932 .rpc_call_prepare
= nfs4_locku_prepare
,
3933 .rpc_call_done
= nfs4_locku_done
,
3934 .rpc_release
= nfs4_locku_release_calldata
,
3937 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3938 struct nfs_open_context
*ctx
,
3939 struct nfs4_lock_state
*lsp
,
3940 struct nfs_seqid
*seqid
)
3942 struct nfs4_unlockdata
*data
;
3943 struct rpc_message msg
= {
3944 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3945 .rpc_cred
= ctx
->cred
,
3947 struct rpc_task_setup task_setup_data
= {
3948 .rpc_client
= NFS_CLIENT(lsp
->ls_state
->inode
),
3949 .rpc_message
= &msg
,
3950 .callback_ops
= &nfs4_locku_ops
,
3951 .workqueue
= nfsiod_workqueue
,
3952 .flags
= RPC_TASK_ASYNC
,
3955 /* Ensure this is an unlock - when canceling a lock, the
3956 * canceled lock is passed in, and it won't be an unlock.
3958 fl
->fl_type
= F_UNLCK
;
3960 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3962 nfs_free_seqid(seqid
);
3963 return ERR_PTR(-ENOMEM
);
3966 msg
.rpc_argp
= &data
->arg
,
3967 msg
.rpc_resp
= &data
->res
,
3968 task_setup_data
.callback_data
= data
;
3969 return rpc_run_task(&task_setup_data
);
3972 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3974 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3975 struct nfs_seqid
*seqid
;
3976 struct nfs4_lock_state
*lsp
;
3977 struct rpc_task
*task
;
3979 unsigned char fl_flags
= request
->fl_flags
;
3981 status
= nfs4_set_lock_state(state
, request
);
3982 /* Unlock _before_ we do the RPC call */
3983 request
->fl_flags
|= FL_EXISTS
;
3984 down_read(&nfsi
->rwsem
);
3985 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
) {
3986 up_read(&nfsi
->rwsem
);
3989 up_read(&nfsi
->rwsem
);
3992 /* Is this a delegated lock? */
3993 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3995 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3996 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
, GFP_KERNEL
);
4000 task
= nfs4_do_unlck(request
, nfs_file_open_context(request
->fl_file
), lsp
, seqid
);
4001 status
= PTR_ERR(task
);
4004 status
= nfs4_wait_for_completion_rpc_task(task
);
4007 request
->fl_flags
= fl_flags
;
4011 struct nfs4_lockdata
{
4012 struct nfs_lock_args arg
;
4013 struct nfs_lock_res res
;
4014 struct nfs4_lock_state
*lsp
;
4015 struct nfs_open_context
*ctx
;
4016 struct file_lock fl
;
4017 unsigned long timestamp
;
4020 struct nfs_server
*server
;
4023 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
4024 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
,
4027 struct nfs4_lockdata
*p
;
4028 struct inode
*inode
= lsp
->ls_state
->inode
;
4029 struct nfs_server
*server
= NFS_SERVER(inode
);
4031 p
= kzalloc(sizeof(*p
), gfp_mask
);
4035 p
->arg
.fh
= NFS_FH(inode
);
4037 p
->arg
.open_seqid
= nfs_alloc_seqid(&lsp
->ls_state
->owner
->so_seqid
, gfp_mask
);
4038 if (p
->arg
.open_seqid
== NULL
)
4040 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
, gfp_mask
);
4041 if (p
->arg
.lock_seqid
== NULL
)
4042 goto out_free_seqid
;
4043 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
4044 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
4045 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
4046 p
->res
.lock_seqid
= p
->arg
.lock_seqid
;
4047 p
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
4050 atomic_inc(&lsp
->ls_count
);
4051 p
->ctx
= get_nfs_open_context(ctx
);
4052 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
4055 nfs_free_seqid(p
->arg
.open_seqid
);
4061 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
4063 struct nfs4_lockdata
*data
= calldata
;
4064 struct nfs4_state
*state
= data
->lsp
->ls_state
;
4066 dprintk("%s: begin!\n", __func__
);
4067 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
4069 /* Do we need to do an open_to_lock_owner? */
4070 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
4071 if (nfs_wait_on_sequence(data
->arg
.open_seqid
, task
) != 0)
4073 data
->arg
.open_stateid
= &state
->stateid
;
4074 data
->arg
.new_lock_owner
= 1;
4075 data
->res
.open_seqid
= data
->arg
.open_seqid
;
4077 data
->arg
.new_lock_owner
= 0;
4078 data
->timestamp
= jiffies
;
4079 if (nfs4_setup_sequence(data
->server
,
4080 &data
->arg
.seq_args
,
4081 &data
->res
.seq_res
, 1, task
))
4083 rpc_call_start(task
);
4084 dprintk("%s: done!, ret = %d\n", __func__
, data
->rpc_status
);
4087 static void nfs4_recover_lock_prepare(struct rpc_task
*task
, void *calldata
)
4089 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
4090 nfs4_lock_prepare(task
, calldata
);
4093 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
4095 struct nfs4_lockdata
*data
= calldata
;
4097 dprintk("%s: begin!\n", __func__
);
4099 nfs4_sequence_done(data
->server
, &data
->res
.seq_res
,
4102 data
->rpc_status
= task
->tk_status
;
4103 if (RPC_ASSASSINATED(task
))
4105 if (data
->arg
.new_lock_owner
!= 0) {
4106 if (data
->rpc_status
== 0)
4107 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
4111 if (data
->rpc_status
== 0) {
4112 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
4113 sizeof(data
->lsp
->ls_stateid
.data
));
4114 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
4115 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
4118 dprintk("%s: done, ret = %d!\n", __func__
, data
->rpc_status
);
4121 static void nfs4_lock_release(void *calldata
)
4123 struct nfs4_lockdata
*data
= calldata
;
4125 dprintk("%s: begin!\n", __func__
);
4126 nfs_free_seqid(data
->arg
.open_seqid
);
4127 if (data
->cancelled
!= 0) {
4128 struct rpc_task
*task
;
4129 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
4130 data
->arg
.lock_seqid
);
4133 dprintk("%s: cancelling lock!\n", __func__
);
4135 nfs_free_seqid(data
->arg
.lock_seqid
);
4136 nfs4_put_lock_state(data
->lsp
);
4137 put_nfs_open_context(data
->ctx
);
4139 dprintk("%s: done!\n", __func__
);
4142 static const struct rpc_call_ops nfs4_lock_ops
= {
4143 .rpc_call_prepare
= nfs4_lock_prepare
,
4144 .rpc_call_done
= nfs4_lock_done
,
4145 .rpc_release
= nfs4_lock_release
,
4148 static const struct rpc_call_ops nfs4_recover_lock_ops
= {
4149 .rpc_call_prepare
= nfs4_recover_lock_prepare
,
4150 .rpc_call_done
= nfs4_lock_done
,
4151 .rpc_release
= nfs4_lock_release
,
4154 static void nfs4_handle_setlk_error(struct nfs_server
*server
, struct nfs4_lock_state
*lsp
, int new_lock_owner
, int error
)
4156 struct nfs_client
*clp
= server
->nfs_client
;
4157 struct nfs4_state
*state
= lsp
->ls_state
;
4160 case -NFS4ERR_ADMIN_REVOKED
:
4161 case -NFS4ERR_BAD_STATEID
:
4162 case -NFS4ERR_EXPIRED
:
4163 if (new_lock_owner
!= 0 ||
4164 (lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) != 0)
4165 nfs4_state_mark_reclaim_nograce(clp
, state
);
4166 lsp
->ls_seqid
.flags
&= ~NFS_SEQID_CONFIRMED
;
4168 case -NFS4ERR_STALE_STATEID
:
4169 if (new_lock_owner
!= 0 ||
4170 (lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) != 0)
4171 nfs4_state_mark_reclaim_reboot(clp
, state
);
4172 lsp
->ls_seqid
.flags
&= ~NFS_SEQID_CONFIRMED
;
4176 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int recovery_type
)
4178 struct nfs4_lockdata
*data
;
4179 struct rpc_task
*task
;
4180 struct rpc_message msg
= {
4181 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
4182 .rpc_cred
= state
->owner
->so_cred
,
4184 struct rpc_task_setup task_setup_data
= {
4185 .rpc_client
= NFS_CLIENT(state
->inode
),
4186 .rpc_message
= &msg
,
4187 .callback_ops
= &nfs4_lock_ops
,
4188 .workqueue
= nfsiod_workqueue
,
4189 .flags
= RPC_TASK_ASYNC
,
4193 dprintk("%s: begin!\n", __func__
);
4194 data
= nfs4_alloc_lockdata(fl
, nfs_file_open_context(fl
->fl_file
),
4195 fl
->fl_u
.nfs4_fl
.owner
,
4196 recovery_type
== NFS_LOCK_NEW
? GFP_KERNEL
: GFP_NOFS
);
4200 data
->arg
.block
= 1;
4201 if (recovery_type
> NFS_LOCK_NEW
) {
4202 if (recovery_type
== NFS_LOCK_RECLAIM
)
4203 data
->arg
.reclaim
= NFS_LOCK_RECLAIM
;
4204 task_setup_data
.callback_ops
= &nfs4_recover_lock_ops
;
4206 msg
.rpc_argp
= &data
->arg
,
4207 msg
.rpc_resp
= &data
->res
,
4208 task_setup_data
.callback_data
= data
;
4209 task
= rpc_run_task(&task_setup_data
);
4211 return PTR_ERR(task
);
4212 ret
= nfs4_wait_for_completion_rpc_task(task
);
4214 ret
= data
->rpc_status
;
4216 nfs4_handle_setlk_error(data
->server
, data
->lsp
,
4217 data
->arg
.new_lock_owner
, ret
);
4219 data
->cancelled
= 1;
4221 dprintk("%s: done, ret = %d!\n", __func__
, ret
);
4225 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
4227 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4228 struct nfs4_exception exception
= { };
4232 /* Cache the lock if possible... */
4233 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
4235 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, NFS_LOCK_RECLAIM
);
4236 if (err
!= -NFS4ERR_DELAY
&& err
!= -EKEYEXPIRED
)
4238 nfs4_handle_exception(server
, err
, &exception
);
4239 } while (exception
.retry
);
4243 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
4245 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4246 struct nfs4_exception exception
= { };
4249 err
= nfs4_set_lock_state(state
, request
);
4253 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
4255 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, NFS_LOCK_EXPIRED
);
4259 case -NFS4ERR_GRACE
:
4260 case -NFS4ERR_DELAY
:
4262 nfs4_handle_exception(server
, err
, &exception
);
4265 } while (exception
.retry
);
4270 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4272 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
4273 unsigned char fl_flags
= request
->fl_flags
;
4274 int status
= -ENOLCK
;
4276 if ((fl_flags
& FL_POSIX
) &&
4277 !test_bit(NFS_STATE_POSIX_LOCKS
, &state
->flags
))
4279 /* Is this a delegated open? */
4280 status
= nfs4_set_lock_state(state
, request
);
4283 request
->fl_flags
|= FL_ACCESS
;
4284 status
= do_vfs_lock(request
->fl_file
, request
);
4287 down_read(&nfsi
->rwsem
);
4288 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
4289 /* Yes: cache locks! */
4290 /* ...but avoid races with delegation recall... */
4291 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
4292 status
= do_vfs_lock(request
->fl_file
, request
);
4295 status
= _nfs4_do_setlk(state
, cmd
, request
, NFS_LOCK_NEW
);
4298 /* Note: we always want to sleep here! */
4299 request
->fl_flags
= fl_flags
| FL_SLEEP
;
4300 if (do_vfs_lock(request
->fl_file
, request
) < 0)
4301 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __func__
);
4303 up_read(&nfsi
->rwsem
);
4305 request
->fl_flags
= fl_flags
;
4309 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4311 struct nfs4_exception exception
= { };
4315 err
= _nfs4_proc_setlk(state
, cmd
, request
);
4316 if (err
== -NFS4ERR_DENIED
)
4318 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
4320 } while (exception
.retry
);
4325 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
4327 struct nfs_open_context
*ctx
;
4328 struct nfs4_state
*state
;
4329 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
4332 /* verify open state */
4333 ctx
= nfs_file_open_context(filp
);
4336 if (request
->fl_start
< 0 || request
->fl_end
< 0)
4339 if (IS_GETLK(cmd
)) {
4341 return nfs4_proc_getlk(state
, F_GETLK
, request
);
4345 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
4348 if (request
->fl_type
== F_UNLCK
) {
4350 return nfs4_proc_unlck(state
, cmd
, request
);
4357 status
= nfs4_proc_setlk(state
, cmd
, request
);
4358 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
4360 timeout
= nfs4_set_lock_task_retry(timeout
);
4361 status
= -ERESTARTSYS
;
4364 } while(status
< 0);
4368 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
4370 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4371 struct nfs4_exception exception
= { };
4374 err
= nfs4_set_lock_state(state
, fl
);
4378 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, NFS_LOCK_NEW
);
4381 printk(KERN_ERR
"%s: unhandled error %d.\n",
4386 case -NFS4ERR_EXPIRED
:
4387 case -NFS4ERR_STALE_CLIENTID
:
4388 case -NFS4ERR_STALE_STATEID
:
4389 case -NFS4ERR_BADSESSION
:
4390 case -NFS4ERR_BADSLOT
:
4391 case -NFS4ERR_BAD_HIGH_SLOT
:
4392 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
4393 case -NFS4ERR_DEADSESSION
:
4394 nfs4_schedule_state_recovery(server
->nfs_client
);
4398 * The show must go on: exit, but mark the
4399 * stateid as needing recovery.
4401 case -NFS4ERR_ADMIN_REVOKED
:
4402 case -NFS4ERR_BAD_STATEID
:
4403 case -NFS4ERR_OPENMODE
:
4404 nfs4_state_mark_reclaim_nograce(server
->nfs_client
, state
);
4408 case -NFS4ERR_DENIED
:
4409 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4412 case -NFS4ERR_DELAY
:
4416 err
= nfs4_handle_exception(server
, err
, &exception
);
4417 } while (exception
.retry
);
4422 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4424 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
4425 size_t buflen
, int flags
)
4427 struct inode
*inode
= dentry
->d_inode
;
4429 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
4432 return nfs4_proc_set_acl(inode
, buf
, buflen
);
4435 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4436 * and that's what we'll do for e.g. user attributes that haven't been set.
4437 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4438 * attributes in kernel-managed attribute namespaces. */
4439 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
4442 struct inode
*inode
= dentry
->d_inode
;
4444 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
4447 return nfs4_proc_get_acl(inode
, buf
, buflen
);
4450 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
4452 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
4454 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
4456 if (buf
&& buflen
< len
)
4459 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
4463 static void nfs_fixup_referral_attributes(struct nfs_fattr
*fattr
)
4465 if (!((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) &&
4466 (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
4467 (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)))
4470 fattr
->valid
|= NFS_ATTR_FATTR_TYPE
| NFS_ATTR_FATTR_MODE
|
4471 NFS_ATTR_FATTR_NLINK
;
4472 fattr
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
4476 int nfs4_proc_fs_locations(struct inode
*dir
, const struct qstr
*name
,
4477 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
4479 struct nfs_server
*server
= NFS_SERVER(dir
);
4481 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
4482 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
4484 struct nfs4_fs_locations_arg args
= {
4485 .dir_fh
= NFS_FH(dir
),
4490 struct nfs4_fs_locations_res res
= {
4491 .fs_locations
= fs_locations
,
4493 struct rpc_message msg
= {
4494 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
4500 dprintk("%s: start\n", __func__
);
4501 nfs_fattr_init(&fs_locations
->fattr
);
4502 fs_locations
->server
= server
;
4503 fs_locations
->nlocations
= 0;
4504 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
4505 nfs_fixup_referral_attributes(&fs_locations
->fattr
);
4506 dprintk("%s: returned status = %d\n", __func__
, status
);
4510 #ifdef CONFIG_NFS_V4_1
4512 * nfs4_proc_exchange_id()
4514 * Since the clientid has expired, all compounds using sessions
4515 * associated with the stale clientid will be returning
4516 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4517 * be in some phase of session reset.
4519 int nfs4_proc_exchange_id(struct nfs_client
*clp
, struct rpc_cred
*cred
)
4521 nfs4_verifier verifier
;
4522 struct nfs41_exchange_id_args args
= {
4524 .flags
= clp
->cl_exchange_flags
,
4526 struct nfs41_exchange_id_res res
= {
4530 struct rpc_message msg
= {
4531 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_EXCHANGE_ID
],
4538 dprintk("--> %s\n", __func__
);
4539 BUG_ON(clp
== NULL
);
4541 /* Remove server-only flags */
4542 args
.flags
&= ~EXCHGID4_FLAG_CONFIRMED_R
;
4544 p
= (u32
*)verifier
.data
;
4545 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
4546 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
4547 args
.verifier
= &verifier
;
4550 args
.id_len
= scnprintf(args
.id
, sizeof(args
.id
),
4553 rpc_peeraddr2str(clp
->cl_rpcclient
,
4555 clp
->cl_id_uniquifier
);
4557 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
4559 if (status
!= -NFS4ERR_CLID_INUSE
)
4565 if (++clp
->cl_id_uniquifier
== 0)
4569 dprintk("<-- %s status= %d\n", __func__
, status
);
4573 struct nfs4_get_lease_time_data
{
4574 struct nfs4_get_lease_time_args
*args
;
4575 struct nfs4_get_lease_time_res
*res
;
4576 struct nfs_client
*clp
;
4579 static void nfs4_get_lease_time_prepare(struct rpc_task
*task
,
4583 struct nfs4_get_lease_time_data
*data
=
4584 (struct nfs4_get_lease_time_data
*)calldata
;
4586 dprintk("--> %s\n", __func__
);
4587 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
4588 /* just setup sequence, do not trigger session recovery
4589 since we're invoked within one */
4590 ret
= nfs41_setup_sequence(data
->clp
->cl_session
,
4591 &data
->args
->la_seq_args
,
4592 &data
->res
->lr_seq_res
, 0, task
);
4594 BUG_ON(ret
== -EAGAIN
);
4595 rpc_call_start(task
);
4596 dprintk("<-- %s\n", __func__
);
4600 * Called from nfs4_state_manager thread for session setup, so don't recover
4601 * from sequence operation or clientid errors.
4603 static void nfs4_get_lease_time_done(struct rpc_task
*task
, void *calldata
)
4605 struct nfs4_get_lease_time_data
*data
=
4606 (struct nfs4_get_lease_time_data
*)calldata
;
4608 dprintk("--> %s\n", __func__
);
4609 nfs41_sequence_done(&data
->res
->lr_seq_res
);
4610 switch (task
->tk_status
) {
4611 case -NFS4ERR_DELAY
:
4612 case -NFS4ERR_GRACE
:
4614 dprintk("%s Retry: tk_status %d\n", __func__
, task
->tk_status
);
4615 rpc_delay(task
, NFS4_POLL_RETRY_MIN
);
4616 task
->tk_status
= 0;
4617 nfs_restart_rpc(task
, data
->clp
);
4620 dprintk("<-- %s\n", __func__
);
4623 struct rpc_call_ops nfs4_get_lease_time_ops
= {
4624 .rpc_call_prepare
= nfs4_get_lease_time_prepare
,
4625 .rpc_call_done
= nfs4_get_lease_time_done
,
4628 int nfs4_proc_get_lease_time(struct nfs_client
*clp
, struct nfs_fsinfo
*fsinfo
)
4630 struct rpc_task
*task
;
4631 struct nfs4_get_lease_time_args args
;
4632 struct nfs4_get_lease_time_res res
= {
4633 .lr_fsinfo
= fsinfo
,
4635 struct nfs4_get_lease_time_data data
= {
4640 struct rpc_message msg
= {
4641 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GET_LEASE_TIME
],
4645 struct rpc_task_setup task_setup
= {
4646 .rpc_client
= clp
->cl_rpcclient
,
4647 .rpc_message
= &msg
,
4648 .callback_ops
= &nfs4_get_lease_time_ops
,
4649 .callback_data
= &data
4653 res
.lr_seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
4654 dprintk("--> %s\n", __func__
);
4655 task
= rpc_run_task(&task_setup
);
4658 status
= PTR_ERR(task
);
4660 status
= task
->tk_status
;
4663 dprintk("<-- %s return %d\n", __func__
, status
);
4669 * Reset a slot table
4671 static int nfs4_reset_slot_table(struct nfs4_slot_table
*tbl
, u32 max_reqs
,
4674 struct nfs4_slot
*new = NULL
;
4678 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__
,
4679 max_reqs
, tbl
->max_slots
);
4681 /* Does the newly negotiated max_reqs match the existing slot table? */
4682 if (max_reqs
!= tbl
->max_slots
) {
4684 new = kmalloc(max_reqs
* sizeof(struct nfs4_slot
),
4691 spin_lock(&tbl
->slot_tbl_lock
);
4694 tbl
->max_slots
= max_reqs
;
4696 for (i
= 0; i
< tbl
->max_slots
; ++i
)
4697 tbl
->slots
[i
].seq_nr
= ivalue
;
4698 spin_unlock(&tbl
->slot_tbl_lock
);
4699 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__
,
4700 tbl
, tbl
->slots
, tbl
->max_slots
);
4702 dprintk("<-- %s: return %d\n", __func__
, ret
);
4707 * Reset the forechannel and backchannel slot tables
4709 static int nfs4_reset_slot_tables(struct nfs4_session
*session
)
4713 status
= nfs4_reset_slot_table(&session
->fc_slot_table
,
4714 session
->fc_attrs
.max_reqs
, 1);
4718 status
= nfs4_reset_slot_table(&session
->bc_slot_table
,
4719 session
->bc_attrs
.max_reqs
, 0);
4723 /* Destroy the slot table */
4724 static void nfs4_destroy_slot_tables(struct nfs4_session
*session
)
4726 if (session
->fc_slot_table
.slots
!= NULL
) {
4727 kfree(session
->fc_slot_table
.slots
);
4728 session
->fc_slot_table
.slots
= NULL
;
4730 if (session
->bc_slot_table
.slots
!= NULL
) {
4731 kfree(session
->bc_slot_table
.slots
);
4732 session
->bc_slot_table
.slots
= NULL
;
4738 * Initialize slot table
4740 static int nfs4_init_slot_table(struct nfs4_slot_table
*tbl
,
4741 int max_slots
, int ivalue
)
4743 struct nfs4_slot
*slot
;
4746 BUG_ON(max_slots
> NFS4_MAX_SLOT_TABLE
);
4748 dprintk("--> %s: max_reqs=%u\n", __func__
, max_slots
);
4750 slot
= kcalloc(max_slots
, sizeof(struct nfs4_slot
), GFP_NOFS
);
4755 spin_lock(&tbl
->slot_tbl_lock
);
4756 tbl
->max_slots
= max_slots
;
4758 tbl
->highest_used_slotid
= -1; /* no slot is currently used */
4759 spin_unlock(&tbl
->slot_tbl_lock
);
4760 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__
,
4761 tbl
, tbl
->slots
, tbl
->max_slots
);
4763 dprintk("<-- %s: return %d\n", __func__
, ret
);
4768 * Initialize the forechannel and backchannel tables
4770 static int nfs4_init_slot_tables(struct nfs4_session
*session
)
4772 struct nfs4_slot_table
*tbl
;
4775 tbl
= &session
->fc_slot_table
;
4776 if (tbl
->slots
== NULL
) {
4777 status
= nfs4_init_slot_table(tbl
,
4778 session
->fc_attrs
.max_reqs
, 1);
4783 tbl
= &session
->bc_slot_table
;
4784 if (tbl
->slots
== NULL
) {
4785 status
= nfs4_init_slot_table(tbl
,
4786 session
->bc_attrs
.max_reqs
, 0);
4788 nfs4_destroy_slot_tables(session
);
4794 struct nfs4_session
*nfs4_alloc_session(struct nfs_client
*clp
)
4796 struct nfs4_session
*session
;
4797 struct nfs4_slot_table
*tbl
;
4799 session
= kzalloc(sizeof(struct nfs4_session
), GFP_NOFS
);
4804 * The create session reply races with the server back
4805 * channel probe. Mark the client NFS_CS_SESSION_INITING
4806 * so that the client back channel can find the
4809 clp
->cl_cons_state
= NFS_CS_SESSION_INITING
;
4810 init_completion(&session
->complete
);
4812 tbl
= &session
->fc_slot_table
;
4813 tbl
->highest_used_slotid
= -1;
4814 spin_lock_init(&tbl
->slot_tbl_lock
);
4815 rpc_init_priority_wait_queue(&tbl
->slot_tbl_waitq
, "ForeChannel Slot table");
4817 tbl
= &session
->bc_slot_table
;
4818 tbl
->highest_used_slotid
= -1;
4819 spin_lock_init(&tbl
->slot_tbl_lock
);
4820 rpc_init_wait_queue(&tbl
->slot_tbl_waitq
, "BackChannel Slot table");
4826 void nfs4_destroy_session(struct nfs4_session
*session
)
4828 nfs4_proc_destroy_session(session
);
4829 dprintk("%s Destroy backchannel for xprt %p\n",
4830 __func__
, session
->clp
->cl_rpcclient
->cl_xprt
);
4831 xprt_destroy_backchannel(session
->clp
->cl_rpcclient
->cl_xprt
,
4832 NFS41_BC_MIN_CALLBACKS
);
4833 nfs4_destroy_slot_tables(session
);
4838 * Initialize the values to be used by the client in CREATE_SESSION
4839 * If nfs4_init_session set the fore channel request and response sizes,
4842 * Set the back channel max_resp_sz_cached to zero to force the client to
4843 * always set csa_cachethis to FALSE because the current implementation
4844 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4846 static void nfs4_init_channel_attrs(struct nfs41_create_session_args
*args
)
4848 struct nfs4_session
*session
= args
->client
->cl_session
;
4849 unsigned int mxrqst_sz
= session
->fc_attrs
.max_rqst_sz
,
4850 mxresp_sz
= session
->fc_attrs
.max_resp_sz
;
4853 mxrqst_sz
= NFS_MAX_FILE_IO_SIZE
;
4855 mxresp_sz
= NFS_MAX_FILE_IO_SIZE
;
4856 /* Fore channel attributes */
4857 args
->fc_attrs
.headerpadsz
= 0;
4858 args
->fc_attrs
.max_rqst_sz
= mxrqst_sz
;
4859 args
->fc_attrs
.max_resp_sz
= mxresp_sz
;
4860 args
->fc_attrs
.max_ops
= NFS4_MAX_OPS
;
4861 args
->fc_attrs
.max_reqs
= session
->clp
->cl_rpcclient
->cl_xprt
->max_reqs
;
4863 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4864 "max_ops=%u max_reqs=%u\n",
4866 args
->fc_attrs
.max_rqst_sz
, args
->fc_attrs
.max_resp_sz
,
4867 args
->fc_attrs
.max_ops
, args
->fc_attrs
.max_reqs
);
4869 /* Back channel attributes */
4870 args
->bc_attrs
.headerpadsz
= 0;
4871 args
->bc_attrs
.max_rqst_sz
= PAGE_SIZE
;
4872 args
->bc_attrs
.max_resp_sz
= PAGE_SIZE
;
4873 args
->bc_attrs
.max_resp_sz_cached
= 0;
4874 args
->bc_attrs
.max_ops
= NFS4_MAX_BACK_CHANNEL_OPS
;
4875 args
->bc_attrs
.max_reqs
= 1;
4877 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4878 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4880 args
->bc_attrs
.max_rqst_sz
, args
->bc_attrs
.max_resp_sz
,
4881 args
->bc_attrs
.max_resp_sz_cached
, args
->bc_attrs
.max_ops
,
4882 args
->bc_attrs
.max_reqs
);
4885 static int _verify_channel_attr(char *chan
, char *attr_name
, u32 sent
, u32 rcvd
)
4889 printk(KERN_WARNING
"%s: Session INVALID: %s channel %s increased. "
4890 "sent=%u rcvd=%u\n", __func__
, chan
, attr_name
, sent
, rcvd
);
4894 #define _verify_fore_channel_attr(_name_) \
4895 _verify_channel_attr("fore", #_name_, \
4896 args->fc_attrs._name_, \
4897 session->fc_attrs._name_)
4899 #define _verify_back_channel_attr(_name_) \
4900 _verify_channel_attr("back", #_name_, \
4901 args->bc_attrs._name_, \
4902 session->bc_attrs._name_)
4905 * The server is not allowed to increase the fore channel header pad size,
4906 * maximum response size, or maximum number of operations.
4908 * The back channel attributes are only negotiatied down: We send what the
4909 * (back channel) server insists upon.
4911 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args
*args
,
4912 struct nfs4_session
*session
)
4916 ret
|= _verify_fore_channel_attr(headerpadsz
);
4917 ret
|= _verify_fore_channel_attr(max_resp_sz
);
4918 ret
|= _verify_fore_channel_attr(max_ops
);
4920 ret
|= _verify_back_channel_attr(headerpadsz
);
4921 ret
|= _verify_back_channel_attr(max_rqst_sz
);
4922 ret
|= _verify_back_channel_attr(max_resp_sz
);
4923 ret
|= _verify_back_channel_attr(max_resp_sz_cached
);
4924 ret
|= _verify_back_channel_attr(max_ops
);
4925 ret
|= _verify_back_channel_attr(max_reqs
);
4930 static int _nfs4_proc_create_session(struct nfs_client
*clp
)
4932 struct nfs4_session
*session
= clp
->cl_session
;
4933 struct nfs41_create_session_args args
= {
4935 .cb_program
= NFS4_CALLBACK
,
4937 struct nfs41_create_session_res res
= {
4940 struct rpc_message msg
= {
4941 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE_SESSION
],
4947 nfs4_init_channel_attrs(&args
);
4948 args
.flags
= (SESSION4_PERSIST
| SESSION4_BACK_CHAN
);
4950 status
= rpc_call_sync(session
->clp
->cl_rpcclient
, &msg
, 0);
4953 /* Verify the session's negotiated channel_attrs values */
4954 status
= nfs4_verify_channel_attrs(&args
, session
);
4956 /* Increment the clientid slot sequence id */
4964 * Issues a CREATE_SESSION operation to the server.
4965 * It is the responsibility of the caller to verify the session is
4966 * expired before calling this routine.
4968 int nfs4_proc_create_session(struct nfs_client
*clp
)
4972 struct nfs4_session
*session
= clp
->cl_session
;
4974 dprintk("--> %s clp=%p session=%p\n", __func__
, clp
, session
);
4976 status
= _nfs4_proc_create_session(clp
);
4980 /* Init and reset the fore channel */
4981 status
= nfs4_init_slot_tables(session
);
4982 dprintk("slot table initialization returned %d\n", status
);
4985 status
= nfs4_reset_slot_tables(session
);
4986 dprintk("slot table reset returned %d\n", status
);
4990 ptr
= (unsigned *)&session
->sess_id
.data
[0];
4991 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__
,
4992 clp
->cl_seqid
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
4994 dprintk("<-- %s\n", __func__
);
4999 * Issue the over-the-wire RPC DESTROY_SESSION.
5000 * The caller must serialize access to this routine.
5002 int nfs4_proc_destroy_session(struct nfs4_session
*session
)
5005 struct rpc_message msg
;
5007 dprintk("--> nfs4_proc_destroy_session\n");
5009 /* session is still being setup */
5010 if (session
->clp
->cl_cons_state
!= NFS_CS_READY
)
5013 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DESTROY_SESSION
];
5014 msg
.rpc_argp
= session
;
5015 msg
.rpc_resp
= NULL
;
5016 msg
.rpc_cred
= NULL
;
5017 status
= rpc_call_sync(session
->clp
->cl_rpcclient
, &msg
, 0);
5021 "Got error %d from the server on DESTROY_SESSION. "
5022 "Session has been destroyed regardless...\n", status
);
5024 dprintk("<-- nfs4_proc_destroy_session\n");
5028 int nfs4_init_session(struct nfs_server
*server
)
5030 struct nfs_client
*clp
= server
->nfs_client
;
5031 struct nfs4_session
*session
;
5032 unsigned int rsize
, wsize
;
5035 if (!nfs4_has_session(clp
))
5038 rsize
= server
->rsize
;
5040 rsize
= NFS_MAX_FILE_IO_SIZE
;
5041 wsize
= server
->wsize
;
5043 wsize
= NFS_MAX_FILE_IO_SIZE
;
5045 session
= clp
->cl_session
;
5046 session
->fc_attrs
.max_rqst_sz
= wsize
+ nfs41_maxwrite_overhead
;
5047 session
->fc_attrs
.max_resp_sz
= rsize
+ nfs41_maxread_overhead
;
5049 ret
= nfs4_recover_expired_lease(server
);
5051 ret
= nfs4_check_client_ready(clp
);
5056 * Renew the cl_session lease.
5058 struct nfs4_sequence_data
{
5059 struct nfs_client
*clp
;
5060 struct nfs4_sequence_args args
;
5061 struct nfs4_sequence_res res
;
5064 static void nfs41_sequence_release(void *data
)
5066 struct nfs4_sequence_data
*calldata
= data
;
5067 struct nfs_client
*clp
= calldata
->clp
;
5069 if (atomic_read(&clp
->cl_count
) > 1)
5070 nfs4_schedule_state_renewal(clp
);
5071 nfs_put_client(clp
);
5075 static int nfs41_sequence_handle_errors(struct rpc_task
*task
, struct nfs_client
*clp
)
5077 switch(task
->tk_status
) {
5078 case -NFS4ERR_DELAY
:
5080 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
5083 nfs4_schedule_state_recovery(clp
);
5088 static void nfs41_sequence_call_done(struct rpc_task
*task
, void *data
)
5090 struct nfs4_sequence_data
*calldata
= data
;
5091 struct nfs_client
*clp
= calldata
->clp
;
5093 nfs41_sequence_done(task
->tk_msg
.rpc_resp
);
5095 if (task
->tk_status
< 0) {
5096 dprintk("%s ERROR %d\n", __func__
, task
->tk_status
);
5097 if (atomic_read(&clp
->cl_count
) == 1)
5100 if (nfs41_sequence_handle_errors(task
, clp
) == -EAGAIN
) {
5101 rpc_restart_call_prepare(task
);
5105 dprintk("%s rpc_cred %p\n", __func__
, task
->tk_msg
.rpc_cred
);
5107 dprintk("<-- %s\n", __func__
);
5110 static void nfs41_sequence_prepare(struct rpc_task
*task
, void *data
)
5112 struct nfs4_sequence_data
*calldata
= data
;
5113 struct nfs_client
*clp
= calldata
->clp
;
5114 struct nfs4_sequence_args
*args
;
5115 struct nfs4_sequence_res
*res
;
5117 args
= task
->tk_msg
.rpc_argp
;
5118 res
= task
->tk_msg
.rpc_resp
;
5120 if (nfs41_setup_sequence(clp
->cl_session
, args
, res
, 0, task
))
5122 rpc_call_start(task
);
5125 static const struct rpc_call_ops nfs41_sequence_ops
= {
5126 .rpc_call_done
= nfs41_sequence_call_done
,
5127 .rpc_call_prepare
= nfs41_sequence_prepare
,
5128 .rpc_release
= nfs41_sequence_release
,
5131 static struct rpc_task
*_nfs41_proc_sequence(struct nfs_client
*clp
, struct rpc_cred
*cred
)
5133 struct nfs4_sequence_data
*calldata
;
5134 struct rpc_message msg
= {
5135 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SEQUENCE
],
5138 struct rpc_task_setup task_setup_data
= {
5139 .rpc_client
= clp
->cl_rpcclient
,
5140 .rpc_message
= &msg
,
5141 .callback_ops
= &nfs41_sequence_ops
,
5142 .flags
= RPC_TASK_ASYNC
| RPC_TASK_SOFT
,
5145 if (!atomic_inc_not_zero(&clp
->cl_count
))
5146 return ERR_PTR(-EIO
);
5147 calldata
= kmalloc(sizeof(*calldata
), GFP_NOFS
);
5148 if (calldata
== NULL
) {
5149 nfs_put_client(clp
);
5150 return ERR_PTR(-ENOMEM
);
5152 calldata
->res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
5153 msg
.rpc_argp
= &calldata
->args
;
5154 msg
.rpc_resp
= &calldata
->res
;
5155 calldata
->clp
= clp
;
5156 task_setup_data
.callback_data
= calldata
;
5158 return rpc_run_task(&task_setup_data
);
5161 static int nfs41_proc_async_sequence(struct nfs_client
*clp
, struct rpc_cred
*cred
)
5163 struct rpc_task
*task
;
5166 task
= _nfs41_proc_sequence(clp
, cred
);
5168 ret
= PTR_ERR(task
);
5171 dprintk("<-- %s status=%d\n", __func__
, ret
);
5175 static int nfs4_proc_sequence(struct nfs_client
*clp
, struct rpc_cred
*cred
)
5177 struct rpc_task
*task
;
5180 task
= _nfs41_proc_sequence(clp
, cred
);
5182 ret
= PTR_ERR(task
);
5185 ret
= rpc_wait_for_completion_task(task
);
5187 ret
= task
->tk_status
;
5190 dprintk("<-- %s status=%d\n", __func__
, ret
);
5194 struct nfs4_reclaim_complete_data
{
5195 struct nfs_client
*clp
;
5196 struct nfs41_reclaim_complete_args arg
;
5197 struct nfs41_reclaim_complete_res res
;
5200 static void nfs4_reclaim_complete_prepare(struct rpc_task
*task
, void *data
)
5202 struct nfs4_reclaim_complete_data
*calldata
= data
;
5204 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
5205 if (nfs41_setup_sequence(calldata
->clp
->cl_session
,
5206 &calldata
->arg
.seq_args
,
5207 &calldata
->res
.seq_res
, 0, task
))
5210 rpc_call_start(task
);
5213 static int nfs41_reclaim_complete_handle_errors(struct rpc_task
*task
, struct nfs_client
*clp
)
5215 switch(task
->tk_status
) {
5217 case -NFS4ERR_COMPLETE_ALREADY
:
5218 case -NFS4ERR_WRONG_CRED
: /* What to do here? */
5220 case -NFS4ERR_DELAY
:
5222 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
5225 nfs4_schedule_state_recovery(clp
);
5230 static void nfs4_reclaim_complete_done(struct rpc_task
*task
, void *data
)
5232 struct nfs4_reclaim_complete_data
*calldata
= data
;
5233 struct nfs_client
*clp
= calldata
->clp
;
5234 struct nfs4_sequence_res
*res
= &calldata
->res
.seq_res
;
5236 dprintk("--> %s\n", __func__
);
5237 nfs41_sequence_done(res
);
5239 if (nfs41_reclaim_complete_handle_errors(task
, clp
) == -EAGAIN
) {
5240 rpc_restart_call_prepare(task
);
5243 dprintk("<-- %s\n", __func__
);
5246 static void nfs4_free_reclaim_complete_data(void *data
)
5248 struct nfs4_reclaim_complete_data
*calldata
= data
;
5253 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops
= {
5254 .rpc_call_prepare
= nfs4_reclaim_complete_prepare
,
5255 .rpc_call_done
= nfs4_reclaim_complete_done
,
5256 .rpc_release
= nfs4_free_reclaim_complete_data
,
5260 * Issue a global reclaim complete.
5262 static int nfs41_proc_reclaim_complete(struct nfs_client
*clp
)
5264 struct nfs4_reclaim_complete_data
*calldata
;
5265 struct rpc_task
*task
;
5266 struct rpc_message msg
= {
5267 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RECLAIM_COMPLETE
],
5269 struct rpc_task_setup task_setup_data
= {
5270 .rpc_client
= clp
->cl_rpcclient
,
5271 .rpc_message
= &msg
,
5272 .callback_ops
= &nfs4_reclaim_complete_call_ops
,
5273 .flags
= RPC_TASK_ASYNC
,
5275 int status
= -ENOMEM
;
5277 dprintk("--> %s\n", __func__
);
5278 calldata
= kzalloc(sizeof(*calldata
), GFP_NOFS
);
5279 if (calldata
== NULL
)
5281 calldata
->clp
= clp
;
5282 calldata
->arg
.one_fs
= 0;
5283 calldata
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
5285 msg
.rpc_argp
= &calldata
->arg
;
5286 msg
.rpc_resp
= &calldata
->res
;
5287 task_setup_data
.callback_data
= calldata
;
5288 task
= rpc_run_task(&task_setup_data
);
5290 status
= PTR_ERR(task
);
5296 dprintk("<-- %s status=%d\n", __func__
, status
);
5299 #endif /* CONFIG_NFS_V4_1 */
5301 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops
= {
5302 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
5303 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
5304 .recover_open
= nfs4_open_reclaim
,
5305 .recover_lock
= nfs4_lock_reclaim
,
5306 .establish_clid
= nfs4_init_clientid
,
5307 .get_clid_cred
= nfs4_get_setclientid_cred
,
5310 #if defined(CONFIG_NFS_V4_1)
5311 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops
= {
5312 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
5313 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
5314 .recover_open
= nfs4_open_reclaim
,
5315 .recover_lock
= nfs4_lock_reclaim
,
5316 .establish_clid
= nfs41_init_clientid
,
5317 .get_clid_cred
= nfs4_get_exchange_id_cred
,
5318 .reclaim_complete
= nfs41_proc_reclaim_complete
,
5320 #endif /* CONFIG_NFS_V4_1 */
5322 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops
= {
5323 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
5324 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
5325 .recover_open
= nfs4_open_expired
,
5326 .recover_lock
= nfs4_lock_expired
,
5327 .establish_clid
= nfs4_init_clientid
,
5328 .get_clid_cred
= nfs4_get_setclientid_cred
,
5331 #if defined(CONFIG_NFS_V4_1)
5332 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops
= {
5333 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
5334 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
5335 .recover_open
= nfs4_open_expired
,
5336 .recover_lock
= nfs4_lock_expired
,
5337 .establish_clid
= nfs41_init_clientid
,
5338 .get_clid_cred
= nfs4_get_exchange_id_cred
,
5340 #endif /* CONFIG_NFS_V4_1 */
5342 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops
= {
5343 .sched_state_renewal
= nfs4_proc_async_renew
,
5344 .get_state_renewal_cred_locked
= nfs4_get_renew_cred_locked
,
5345 .renew_lease
= nfs4_proc_renew
,
5348 #if defined(CONFIG_NFS_V4_1)
5349 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops
= {
5350 .sched_state_renewal
= nfs41_proc_async_sequence
,
5351 .get_state_renewal_cred_locked
= nfs4_get_machine_cred_locked
,
5352 .renew_lease
= nfs4_proc_sequence
,
5356 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops
= {
5358 .call_sync
= _nfs4_call_sync
,
5361 #if defined(CONFIG_NFS_V4_1)
5362 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops
= {
5364 .call_sync
= _nfs4_call_sync_session
,
5369 * Per minor version reboot and network partition recovery ops
5372 struct nfs4_state_recovery_ops
*nfs4_reboot_recovery_ops
[] = {
5373 &nfs40_reboot_recovery_ops
,
5374 #if defined(CONFIG_NFS_V4_1)
5375 &nfs41_reboot_recovery_ops
,
5379 struct nfs4_state_recovery_ops
*nfs4_nograce_recovery_ops
[] = {
5380 &nfs40_nograce_recovery_ops
,
5381 #if defined(CONFIG_NFS_V4_1)
5382 &nfs41_nograce_recovery_ops
,
5386 struct nfs4_state_maintenance_ops
*nfs4_state_renewal_ops
[] = {
5387 &nfs40_state_renewal_ops
,
5388 #if defined(CONFIG_NFS_V4_1)
5389 &nfs41_state_renewal_ops
,
5393 const struct nfs4_minor_version_ops
*nfs_v4_minor_ops
[] = {
5394 [0] = &nfs_v4_0_minor_ops
,
5395 #if defined(CONFIG_NFS_V4_1)
5396 [1] = &nfs_v4_1_minor_ops
,
5400 static const struct inode_operations nfs4_file_inode_operations
= {
5401 .permission
= nfs_permission
,
5402 .getattr
= nfs_getattr
,
5403 .setattr
= nfs_setattr
,
5404 .getxattr
= nfs4_getxattr
,
5405 .setxattr
= nfs4_setxattr
,
5406 .listxattr
= nfs4_listxattr
,
5409 const struct nfs_rpc_ops nfs_v4_clientops
= {
5410 .version
= 4, /* protocol version */
5411 .dentry_ops
= &nfs4_dentry_operations
,
5412 .dir_inode_ops
= &nfs4_dir_inode_operations
,
5413 .file_inode_ops
= &nfs4_file_inode_operations
,
5414 .getroot
= nfs4_proc_get_root
,
5415 .getattr
= nfs4_proc_getattr
,
5416 .setattr
= nfs4_proc_setattr
,
5417 .lookupfh
= nfs4_proc_lookupfh
,
5418 .lookup
= nfs4_proc_lookup
,
5419 .access
= nfs4_proc_access
,
5420 .readlink
= nfs4_proc_readlink
,
5421 .create
= nfs4_proc_create
,
5422 .remove
= nfs4_proc_remove
,
5423 .unlink_setup
= nfs4_proc_unlink_setup
,
5424 .unlink_done
= nfs4_proc_unlink_done
,
5425 .rename
= nfs4_proc_rename
,
5426 .link
= nfs4_proc_link
,
5427 .symlink
= nfs4_proc_symlink
,
5428 .mkdir
= nfs4_proc_mkdir
,
5429 .rmdir
= nfs4_proc_remove
,
5430 .readdir
= nfs4_proc_readdir
,
5431 .mknod
= nfs4_proc_mknod
,
5432 .statfs
= nfs4_proc_statfs
,
5433 .fsinfo
= nfs4_proc_fsinfo
,
5434 .pathconf
= nfs4_proc_pathconf
,
5435 .set_capabilities
= nfs4_server_capabilities
,
5436 .decode_dirent
= nfs4_decode_dirent
,
5437 .read_setup
= nfs4_proc_read_setup
,
5438 .read_done
= nfs4_read_done
,
5439 .write_setup
= nfs4_proc_write_setup
,
5440 .write_done
= nfs4_write_done
,
5441 .commit_setup
= nfs4_proc_commit_setup
,
5442 .commit_done
= nfs4_commit_done
,
5443 .lock
= nfs4_proc_lock
,
5444 .clear_acl_cache
= nfs4_zap_acl_attr
,
5445 .close_context
= nfs4_close_context
,