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(NFS4CLNT_SESSION_DRAINING
, &ses
->clp
->cl_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(const struct nfs_client
*clp
,
374 struct nfs4_sequence_res
*res
)
376 struct nfs4_slot_table
*tbl
;
378 tbl
= &clp
->cl_session
->fc_slot_table
;
379 if (res
->sr_slotid
== NFS4_MAX_SLOT_TABLE
) {
380 /* just wake up the next guy waiting since
381 * we may have not consumed a slot after all */
382 dprintk("%s: No slot\n", __func__
);
386 spin_lock(&tbl
->slot_tbl_lock
);
387 nfs4_free_slot(tbl
, res
->sr_slotid
);
388 nfs41_check_drain_session_complete(clp
->cl_session
);
389 spin_unlock(&tbl
->slot_tbl_lock
);
390 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
393 static void nfs41_sequence_done(struct nfs_client
*clp
,
394 struct nfs4_sequence_res
*res
,
397 unsigned long timestamp
;
398 struct nfs4_slot_table
*tbl
;
399 struct nfs4_slot
*slot
;
402 * sr_status remains 1 if an RPC level error occurred. The server
403 * may or may not have processed the sequence operation..
404 * Proceed as if the server received and processed the sequence
407 if (res
->sr_status
== 1)
408 res
->sr_status
= NFS_OK
;
410 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
411 if (res
->sr_slotid
== NFS4_MAX_SLOT_TABLE
)
414 /* Check the SEQUENCE operation status */
415 if (res
->sr_status
== 0) {
416 tbl
= &clp
->cl_session
->fc_slot_table
;
417 slot
= tbl
->slots
+ res
->sr_slotid
;
418 /* Update the slot's sequence and clientid lease timer */
420 timestamp
= res
->sr_renewal_time
;
421 spin_lock(&clp
->cl_lock
);
422 if (time_before(clp
->cl_last_renewal
, timestamp
))
423 clp
->cl_last_renewal
= timestamp
;
424 spin_unlock(&clp
->cl_lock
);
425 /* Check sequence flags */
426 if (atomic_read(&clp
->cl_count
) > 1)
427 nfs41_handle_sequence_flag_errors(clp
, res
->sr_status_flags
);
430 /* The session may be reset by one of the error handlers. */
431 dprintk("%s: Error %d free the slot \n", __func__
, res
->sr_status
);
432 nfs41_sequence_free_slot(clp
, res
);
436 * nfs4_find_slot - efficiently look for a free slot
438 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
439 * If found, we mark the slot as used, update the highest_used_slotid,
440 * and respectively set up the sequence operation args.
441 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
443 * Note: must be called with under the slot_tbl_lock.
446 nfs4_find_slot(struct nfs4_slot_table
*tbl
)
449 u8 ret_id
= NFS4_MAX_SLOT_TABLE
;
450 BUILD_BUG_ON((u8
)NFS4_MAX_SLOT_TABLE
!= (int)NFS4_MAX_SLOT_TABLE
);
452 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
453 __func__
, tbl
->used_slots
[0], tbl
->highest_used_slotid
,
455 slotid
= find_first_zero_bit(tbl
->used_slots
, tbl
->max_slots
);
456 if (slotid
>= tbl
->max_slots
)
458 __set_bit(slotid
, tbl
->used_slots
);
459 if (slotid
> tbl
->highest_used_slotid
)
460 tbl
->highest_used_slotid
= slotid
;
463 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
464 __func__
, tbl
->used_slots
[0], tbl
->highest_used_slotid
, ret_id
);
468 static int nfs41_setup_sequence(struct nfs4_session
*session
,
469 struct nfs4_sequence_args
*args
,
470 struct nfs4_sequence_res
*res
,
472 struct rpc_task
*task
)
474 struct nfs4_slot
*slot
;
475 struct nfs4_slot_table
*tbl
;
478 dprintk("--> %s\n", __func__
);
479 /* slot already allocated? */
480 if (res
->sr_slotid
!= NFS4_MAX_SLOT_TABLE
)
483 memset(res
, 0, sizeof(*res
));
484 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
485 tbl
= &session
->fc_slot_table
;
487 spin_lock(&tbl
->slot_tbl_lock
);
488 if (test_bit(NFS4CLNT_SESSION_DRAINING
, &session
->clp
->cl_state
) &&
489 !rpc_task_has_priority(task
, RPC_PRIORITY_PRIVILEGED
)) {
491 * The state manager will wait until the slot table is empty.
492 * Schedule the reset thread
494 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
495 spin_unlock(&tbl
->slot_tbl_lock
);
496 dprintk("%s Schedule Session Reset\n", __func__
);
500 if (!rpc_queue_empty(&tbl
->slot_tbl_waitq
) &&
501 !rpc_task_has_priority(task
, RPC_PRIORITY_PRIVILEGED
)) {
502 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
503 spin_unlock(&tbl
->slot_tbl_lock
);
504 dprintk("%s enforce FIFO order\n", __func__
);
508 slotid
= nfs4_find_slot(tbl
);
509 if (slotid
== NFS4_MAX_SLOT_TABLE
) {
510 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
511 spin_unlock(&tbl
->slot_tbl_lock
);
512 dprintk("<-- %s: no free slots\n", __func__
);
515 spin_unlock(&tbl
->slot_tbl_lock
);
517 rpc_task_set_priority(task
, RPC_PRIORITY_NORMAL
);
518 slot
= tbl
->slots
+ slotid
;
519 args
->sa_session
= session
;
520 args
->sa_slotid
= slotid
;
521 args
->sa_cache_this
= cache_reply
;
523 dprintk("<-- %s slotid=%d seqid=%d\n", __func__
, slotid
, slot
->seq_nr
);
525 res
->sr_session
= session
;
526 res
->sr_slotid
= slotid
;
527 res
->sr_renewal_time
= jiffies
;
529 * sr_status is only set in decode_sequence, and so will remain
530 * set to 1 if an rpc level failure occurs.
536 int nfs4_setup_sequence(struct nfs_client
*clp
,
537 struct nfs4_sequence_args
*args
,
538 struct nfs4_sequence_res
*res
,
540 struct rpc_task
*task
)
544 dprintk("--> %s clp %p session %p sr_slotid %d\n",
545 __func__
, clp
, clp
->cl_session
, res
->sr_slotid
);
547 if (!nfs4_has_session(clp
))
549 ret
= nfs41_setup_sequence(clp
->cl_session
, args
, res
, cache_reply
,
551 if (ret
&& ret
!= -EAGAIN
) {
552 /* terminate rpc task */
553 task
->tk_status
= ret
;
554 task
->tk_action
= NULL
;
557 dprintk("<-- %s status=%d\n", __func__
, ret
);
561 struct nfs41_call_sync_data
{
562 struct nfs_client
*clp
;
563 struct nfs4_sequence_args
*seq_args
;
564 struct nfs4_sequence_res
*seq_res
;
568 static void nfs41_call_sync_prepare(struct rpc_task
*task
, void *calldata
)
570 struct nfs41_call_sync_data
*data
= calldata
;
572 dprintk("--> %s data->clp->cl_session %p\n", __func__
,
573 data
->clp
->cl_session
);
574 if (nfs4_setup_sequence(data
->clp
, data
->seq_args
,
575 data
->seq_res
, data
->cache_reply
, task
))
577 rpc_call_start(task
);
580 static void nfs41_call_priv_sync_prepare(struct rpc_task
*task
, void *calldata
)
582 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
583 nfs41_call_sync_prepare(task
, calldata
);
586 static void nfs41_call_sync_done(struct rpc_task
*task
, void *calldata
)
588 struct nfs41_call_sync_data
*data
= calldata
;
590 nfs41_sequence_done(data
->clp
, data
->seq_res
, task
->tk_status
);
593 struct rpc_call_ops nfs41_call_sync_ops
= {
594 .rpc_call_prepare
= nfs41_call_sync_prepare
,
595 .rpc_call_done
= nfs41_call_sync_done
,
598 struct rpc_call_ops nfs41_call_priv_sync_ops
= {
599 .rpc_call_prepare
= nfs41_call_priv_sync_prepare
,
600 .rpc_call_done
= nfs41_call_sync_done
,
603 static int nfs4_call_sync_sequence(struct nfs_client
*clp
,
604 struct rpc_clnt
*clnt
,
605 struct rpc_message
*msg
,
606 struct nfs4_sequence_args
*args
,
607 struct nfs4_sequence_res
*res
,
612 struct rpc_task
*task
;
613 struct nfs41_call_sync_data data
= {
617 .cache_reply
= cache_reply
,
619 struct rpc_task_setup task_setup
= {
622 .callback_ops
= &nfs41_call_sync_ops
,
623 .callback_data
= &data
626 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
628 task_setup
.callback_ops
= &nfs41_call_priv_sync_ops
;
629 task
= rpc_run_task(&task_setup
);
633 ret
= task
->tk_status
;
639 int _nfs4_call_sync_session(struct nfs_server
*server
,
640 struct rpc_message
*msg
,
641 struct nfs4_sequence_args
*args
,
642 struct nfs4_sequence_res
*res
,
645 return nfs4_call_sync_sequence(server
->nfs_client
, server
->client
,
646 msg
, args
, res
, cache_reply
, 0);
649 #endif /* CONFIG_NFS_V4_1 */
651 int _nfs4_call_sync(struct nfs_server
*server
,
652 struct rpc_message
*msg
,
653 struct nfs4_sequence_args
*args
,
654 struct nfs4_sequence_res
*res
,
657 args
->sa_session
= res
->sr_session
= NULL
;
658 return rpc_call_sync(server
->client
, msg
, 0);
661 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
662 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
663 &(res)->seq_res, (cache_reply))
665 static void nfs4_sequence_done(const struct nfs_server
*server
,
666 struct nfs4_sequence_res
*res
, int rpc_status
)
668 #ifdef CONFIG_NFS_V4_1
669 if (nfs4_has_session(server
->nfs_client
))
670 nfs41_sequence_done(server
->nfs_client
, res
, rpc_status
);
671 #endif /* CONFIG_NFS_V4_1 */
674 static void update_changeattr(struct inode
*dir
, struct nfs4_change_info
*cinfo
)
676 struct nfs_inode
*nfsi
= NFS_I(dir
);
678 spin_lock(&dir
->i_lock
);
679 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
|NFS_INO_INVALID_DATA
;
680 if (!cinfo
->atomic
|| cinfo
->before
!= nfsi
->change_attr
)
681 nfs_force_lookup_revalidate(dir
);
682 nfsi
->change_attr
= cinfo
->after
;
683 spin_unlock(&dir
->i_lock
);
686 struct nfs4_opendata
{
688 struct nfs_openargs o_arg
;
689 struct nfs_openres o_res
;
690 struct nfs_open_confirmargs c_arg
;
691 struct nfs_open_confirmres c_res
;
692 struct nfs_fattr f_attr
;
693 struct nfs_fattr dir_attr
;
696 struct nfs4_state_owner
*owner
;
697 struct nfs4_state
*state
;
699 unsigned long timestamp
;
700 unsigned int rpc_done
: 1;
706 static void nfs4_init_opendata_res(struct nfs4_opendata
*p
)
708 p
->o_res
.f_attr
= &p
->f_attr
;
709 p
->o_res
.dir_attr
= &p
->dir_attr
;
710 p
->o_res
.seqid
= p
->o_arg
.seqid
;
711 p
->c_res
.seqid
= p
->c_arg
.seqid
;
712 p
->o_res
.server
= p
->o_arg
.server
;
713 nfs_fattr_init(&p
->f_attr
);
714 nfs_fattr_init(&p
->dir_attr
);
715 p
->o_res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
718 static struct nfs4_opendata
*nfs4_opendata_alloc(struct path
*path
,
719 struct nfs4_state_owner
*sp
, fmode_t fmode
, int flags
,
720 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_KERNEL
);
730 p
->o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
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
);
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
->nfs_client
,
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
);
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
))->nfs_client
,
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
, 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_KERNEL
);
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
);
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
];
3167 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3168 * standalone procedure for queueing an asynchronous RENEW.
3170 static void nfs4_renew_release(void *data
)
3172 struct nfs_client
*clp
= data
;
3174 if (atomic_read(&clp
->cl_count
) > 1)
3175 nfs4_schedule_state_renewal(clp
);
3176 nfs_put_client(clp
);
3179 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
3181 struct nfs_client
*clp
= data
;
3182 unsigned long timestamp
= task
->tk_start
;
3184 if (task
->tk_status
< 0) {
3185 /* Unless we're shutting down, schedule state recovery! */
3186 if (test_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
) != 0)
3187 nfs4_schedule_state_recovery(clp
);
3190 spin_lock(&clp
->cl_lock
);
3191 if (time_before(clp
->cl_last_renewal
,timestamp
))
3192 clp
->cl_last_renewal
= timestamp
;
3193 spin_unlock(&clp
->cl_lock
);
3196 static const struct rpc_call_ops nfs4_renew_ops
= {
3197 .rpc_call_done
= nfs4_renew_done
,
3198 .rpc_release
= nfs4_renew_release
,
3201 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3203 struct rpc_message msg
= {
3204 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
3209 if (!atomic_inc_not_zero(&clp
->cl_count
))
3211 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
3212 &nfs4_renew_ops
, clp
);
3215 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3217 struct rpc_message msg
= {
3218 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
3222 unsigned long now
= jiffies
;
3225 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3228 spin_lock(&clp
->cl_lock
);
3229 if (time_before(clp
->cl_last_renewal
,now
))
3230 clp
->cl_last_renewal
= now
;
3231 spin_unlock(&clp
->cl_lock
);
3235 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
3237 return (server
->caps
& NFS_CAP_ACLS
)
3238 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
3239 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
3242 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3243 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3246 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3248 static void buf_to_pages(const void *buf
, size_t buflen
,
3249 struct page
**pages
, unsigned int *pgbase
)
3251 const void *p
= buf
;
3253 *pgbase
= offset_in_page(buf
);
3255 while (p
< buf
+ buflen
) {
3256 *(pages
++) = virt_to_page(p
);
3257 p
+= PAGE_CACHE_SIZE
;
3261 struct nfs4_cached_acl
{
3267 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
3269 struct nfs_inode
*nfsi
= NFS_I(inode
);
3271 spin_lock(&inode
->i_lock
);
3272 kfree(nfsi
->nfs4_acl
);
3273 nfsi
->nfs4_acl
= acl
;
3274 spin_unlock(&inode
->i_lock
);
3277 static void nfs4_zap_acl_attr(struct inode
*inode
)
3279 nfs4_set_cached_acl(inode
, NULL
);
3282 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
3284 struct nfs_inode
*nfsi
= NFS_I(inode
);
3285 struct nfs4_cached_acl
*acl
;
3288 spin_lock(&inode
->i_lock
);
3289 acl
= nfsi
->nfs4_acl
;
3292 if (buf
== NULL
) /* user is just asking for length */
3294 if (acl
->cached
== 0)
3296 ret
= -ERANGE
; /* see getxattr(2) man page */
3297 if (acl
->len
> buflen
)
3299 memcpy(buf
, acl
->data
, acl
->len
);
3303 spin_unlock(&inode
->i_lock
);
3307 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
3309 struct nfs4_cached_acl
*acl
;
3311 if (buf
&& acl_len
<= PAGE_SIZE
) {
3312 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
3316 memcpy(acl
->data
, buf
, acl_len
);
3318 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
3325 nfs4_set_cached_acl(inode
, acl
);
3328 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3330 struct page
*pages
[NFS4ACL_MAXPAGES
];
3331 struct nfs_getaclargs args
= {
3332 .fh
= NFS_FH(inode
),
3336 struct nfs_getaclres res
= {
3340 struct rpc_message msg
= {
3341 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
3345 struct page
*localpage
= NULL
;
3348 if (buflen
< PAGE_SIZE
) {
3349 /* As long as we're doing a round trip to the server anyway,
3350 * let's be prepared for a page of acl data. */
3351 localpage
= alloc_page(GFP_KERNEL
);
3352 resp_buf
= page_address(localpage
);
3353 if (localpage
== NULL
)
3355 args
.acl_pages
[0] = localpage
;
3356 args
.acl_pgbase
= 0;
3357 args
.acl_len
= PAGE_SIZE
;
3360 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
3362 ret
= nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
3365 if (res
.acl_len
> args
.acl_len
)
3366 nfs4_write_cached_acl(inode
, NULL
, res
.acl_len
);
3368 nfs4_write_cached_acl(inode
, resp_buf
, res
.acl_len
);
3371 if (res
.acl_len
> buflen
)
3374 memcpy(buf
, resp_buf
, res
.acl_len
);
3379 __free_page(localpage
);
3383 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3385 struct nfs4_exception exception
= { };
3388 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
3391 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
3392 } while (exception
.retry
);
3396 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
3398 struct nfs_server
*server
= NFS_SERVER(inode
);
3401 if (!nfs4_server_supports_acls(server
))
3403 ret
= nfs_revalidate_inode(server
, inode
);
3406 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
3409 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
3412 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3414 struct nfs_server
*server
= NFS_SERVER(inode
);
3415 struct page
*pages
[NFS4ACL_MAXPAGES
];
3416 struct nfs_setaclargs arg
= {
3417 .fh
= NFS_FH(inode
),
3421 struct nfs_setaclres res
;
3422 struct rpc_message msg
= {
3423 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
3429 if (!nfs4_server_supports_acls(server
))
3431 nfs_inode_return_delegation(inode
);
3432 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
3433 ret
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
3434 nfs_access_zap_cache(inode
);
3435 nfs_zap_acl_cache(inode
);
3439 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3441 struct nfs4_exception exception
= { };
3444 err
= nfs4_handle_exception(NFS_SERVER(inode
),
3445 __nfs4_proc_set_acl(inode
, buf
, buflen
),
3447 } while (exception
.retry
);
3452 _nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs_client
*clp
, struct nfs4_state
*state
)
3454 if (!clp
|| task
->tk_status
>= 0)
3456 switch(task
->tk_status
) {
3457 case -NFS4ERR_ADMIN_REVOKED
:
3458 case -NFS4ERR_BAD_STATEID
:
3459 case -NFS4ERR_OPENMODE
:
3462 nfs4_state_mark_reclaim_nograce(clp
, state
);
3463 goto do_state_recovery
;
3464 case -NFS4ERR_STALE_STATEID
:
3467 nfs4_state_mark_reclaim_reboot(clp
, state
);
3468 case -NFS4ERR_STALE_CLIENTID
:
3469 case -NFS4ERR_EXPIRED
:
3470 goto do_state_recovery
;
3471 #if defined(CONFIG_NFS_V4_1)
3472 case -NFS4ERR_BADSESSION
:
3473 case -NFS4ERR_BADSLOT
:
3474 case -NFS4ERR_BAD_HIGH_SLOT
:
3475 case -NFS4ERR_DEADSESSION
:
3476 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
3477 case -NFS4ERR_SEQ_FALSE_RETRY
:
3478 case -NFS4ERR_SEQ_MISORDERED
:
3479 dprintk("%s ERROR %d, Reset session\n", __func__
,
3481 nfs4_schedule_state_recovery(clp
);
3482 task
->tk_status
= 0;
3484 #endif /* CONFIG_NFS_V4_1 */
3485 case -NFS4ERR_DELAY
:
3487 nfs_inc_server_stats(server
, NFSIOS_DELAY
);
3488 case -NFS4ERR_GRACE
:
3490 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
3491 task
->tk_status
= 0;
3493 case -NFS4ERR_OLD_STATEID
:
3494 task
->tk_status
= 0;
3497 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
3500 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
);
3501 nfs4_schedule_state_recovery(clp
);
3502 if (test_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) == 0)
3503 rpc_wake_up_queued_task(&clp
->cl_rpcwaitq
, task
);
3504 task
->tk_status
= 0;
3509 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs4_state
*state
)
3511 return _nfs4_async_handle_error(task
, server
, server
->nfs_client
, state
);
3514 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
3516 nfs4_verifier sc_verifier
;
3517 struct nfs4_setclientid setclientid
= {
3518 .sc_verifier
= &sc_verifier
,
3521 struct rpc_message msg
= {
3522 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
3523 .rpc_argp
= &setclientid
,
3531 p
= (__be32
*)sc_verifier
.data
;
3532 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
3533 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
3536 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
3537 sizeof(setclientid
.sc_name
), "%s/%s %s %s %u",
3539 rpc_peeraddr2str(clp
->cl_rpcclient
,
3541 rpc_peeraddr2str(clp
->cl_rpcclient
,
3543 clp
->cl_rpcclient
->cl_auth
->au_ops
->au_name
,
3544 clp
->cl_id_uniquifier
);
3545 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
3546 sizeof(setclientid
.sc_netid
),
3547 rpc_peeraddr2str(clp
->cl_rpcclient
,
3548 RPC_DISPLAY_NETID
));
3549 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
3550 sizeof(setclientid
.sc_uaddr
), "%s.%u.%u",
3551 clp
->cl_ipaddr
, port
>> 8, port
& 255);
3553 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3554 if (status
!= -NFS4ERR_CLID_INUSE
)
3559 ssleep(clp
->cl_lease_time
+ 1);
3561 if (++clp
->cl_id_uniquifier
== 0)
3567 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3569 struct nfs_fsinfo fsinfo
;
3570 struct rpc_message msg
= {
3571 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
3573 .rpc_resp
= &fsinfo
,
3580 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3582 spin_lock(&clp
->cl_lock
);
3583 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
3584 clp
->cl_last_renewal
= now
;
3585 spin_unlock(&clp
->cl_lock
);
3590 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3595 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
3599 case -NFS4ERR_RESOURCE
:
3600 /* The IBM lawyers misread another document! */
3601 case -NFS4ERR_DELAY
:
3603 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
3609 struct nfs4_delegreturndata
{
3610 struct nfs4_delegreturnargs args
;
3611 struct nfs4_delegreturnres res
;
3613 nfs4_stateid stateid
;
3614 unsigned long timestamp
;
3615 struct nfs_fattr fattr
;
3619 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3621 struct nfs4_delegreturndata
*data
= calldata
;
3623 nfs4_sequence_done(data
->res
.server
, &data
->res
.seq_res
,
3626 switch (task
->tk_status
) {
3627 case -NFS4ERR_STALE_STATEID
:
3628 case -NFS4ERR_EXPIRED
:
3630 renew_lease(data
->res
.server
, data
->timestamp
);
3633 if (nfs4_async_handle_error(task
, data
->res
.server
, NULL
) ==
3635 nfs_restart_rpc(task
, data
->res
.server
->nfs_client
);
3639 data
->rpc_status
= task
->tk_status
;
3642 static void nfs4_delegreturn_release(void *calldata
)
3647 #if defined(CONFIG_NFS_V4_1)
3648 static void nfs4_delegreturn_prepare(struct rpc_task
*task
, void *data
)
3650 struct nfs4_delegreturndata
*d_data
;
3652 d_data
= (struct nfs4_delegreturndata
*)data
;
3654 if (nfs4_setup_sequence(d_data
->res
.server
->nfs_client
,
3655 &d_data
->args
.seq_args
,
3656 &d_data
->res
.seq_res
, 1, task
))
3658 rpc_call_start(task
);
3660 #endif /* CONFIG_NFS_V4_1 */
3662 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3663 #if defined(CONFIG_NFS_V4_1)
3664 .rpc_call_prepare
= nfs4_delegreturn_prepare
,
3665 #endif /* CONFIG_NFS_V4_1 */
3666 .rpc_call_done
= nfs4_delegreturn_done
,
3667 .rpc_release
= nfs4_delegreturn_release
,
3670 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3672 struct nfs4_delegreturndata
*data
;
3673 struct nfs_server
*server
= NFS_SERVER(inode
);
3674 struct rpc_task
*task
;
3675 struct rpc_message msg
= {
3676 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3679 struct rpc_task_setup task_setup_data
= {
3680 .rpc_client
= server
->client
,
3681 .rpc_message
= &msg
,
3682 .callback_ops
= &nfs4_delegreturn_ops
,
3683 .flags
= RPC_TASK_ASYNC
,
3687 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
3690 data
->args
.fhandle
= &data
->fh
;
3691 data
->args
.stateid
= &data
->stateid
;
3692 data
->args
.bitmask
= server
->attr_bitmask
;
3693 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3694 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3695 data
->res
.fattr
= &data
->fattr
;
3696 data
->res
.server
= server
;
3697 data
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3698 nfs_fattr_init(data
->res
.fattr
);
3699 data
->timestamp
= jiffies
;
3700 data
->rpc_status
= 0;
3702 task_setup_data
.callback_data
= data
;
3703 msg
.rpc_argp
= &data
->args
,
3704 msg
.rpc_resp
= &data
->res
,
3705 task
= rpc_run_task(&task_setup_data
);
3707 return PTR_ERR(task
);
3710 status
= nfs4_wait_for_completion_rpc_task(task
);
3713 status
= data
->rpc_status
;
3716 nfs_refresh_inode(inode
, &data
->fattr
);
3722 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3724 struct nfs_server
*server
= NFS_SERVER(inode
);
3725 struct nfs4_exception exception
= { };
3728 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
, issync
);
3730 case -NFS4ERR_STALE_STATEID
:
3731 case -NFS4ERR_EXPIRED
:
3735 err
= nfs4_handle_exception(server
, err
, &exception
);
3736 } while (exception
.retry
);
3740 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3741 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3744 * sleep, with exponential backoff, and retry the LOCK operation.
3746 static unsigned long
3747 nfs4_set_lock_task_retry(unsigned long timeout
)
3749 schedule_timeout_killable(timeout
);
3751 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3752 return NFS4_LOCK_MAXTIMEOUT
;
3756 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3758 struct inode
*inode
= state
->inode
;
3759 struct nfs_server
*server
= NFS_SERVER(inode
);
3760 struct nfs_client
*clp
= server
->nfs_client
;
3761 struct nfs_lockt_args arg
= {
3762 .fh
= NFS_FH(inode
),
3765 struct nfs_lockt_res res
= {
3768 struct rpc_message msg
= {
3769 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3772 .rpc_cred
= state
->owner
->so_cred
,
3774 struct nfs4_lock_state
*lsp
;
3777 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3778 status
= nfs4_set_lock_state(state
, request
);
3781 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3782 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3783 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
3786 request
->fl_type
= F_UNLCK
;
3788 case -NFS4ERR_DENIED
:
3791 request
->fl_ops
->fl_release_private(request
);
3796 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3798 struct nfs4_exception exception
= { };
3802 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3803 _nfs4_proc_getlk(state
, cmd
, request
),
3805 } while (exception
.retry
);
3809 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3812 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3814 res
= posix_lock_file_wait(file
, fl
);
3817 res
= flock_lock_file_wait(file
, fl
);
3825 struct nfs4_unlockdata
{
3826 struct nfs_locku_args arg
;
3827 struct nfs_locku_res res
;
3828 struct nfs4_lock_state
*lsp
;
3829 struct nfs_open_context
*ctx
;
3830 struct file_lock fl
;
3831 const struct nfs_server
*server
;
3832 unsigned long timestamp
;
3835 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3836 struct nfs_open_context
*ctx
,
3837 struct nfs4_lock_state
*lsp
,
3838 struct nfs_seqid
*seqid
)
3840 struct nfs4_unlockdata
*p
;
3841 struct inode
*inode
= lsp
->ls_state
->inode
;
3843 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3846 p
->arg
.fh
= NFS_FH(inode
);
3848 p
->arg
.seqid
= seqid
;
3849 p
->res
.seqid
= seqid
;
3850 p
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3851 p
->arg
.stateid
= &lsp
->ls_stateid
;
3853 atomic_inc(&lsp
->ls_count
);
3854 /* Ensure we don't close file until we're done freeing locks! */
3855 p
->ctx
= get_nfs_open_context(ctx
);
3856 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3857 p
->server
= NFS_SERVER(inode
);
3861 static void nfs4_locku_release_calldata(void *data
)
3863 struct nfs4_unlockdata
*calldata
= data
;
3864 nfs_free_seqid(calldata
->arg
.seqid
);
3865 nfs4_put_lock_state(calldata
->lsp
);
3866 put_nfs_open_context(calldata
->ctx
);
3870 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3872 struct nfs4_unlockdata
*calldata
= data
;
3874 nfs4_sequence_done(calldata
->server
, &calldata
->res
.seq_res
,
3876 if (RPC_ASSASSINATED(task
))
3878 switch (task
->tk_status
) {
3880 memcpy(calldata
->lsp
->ls_stateid
.data
,
3881 calldata
->res
.stateid
.data
,
3882 sizeof(calldata
->lsp
->ls_stateid
.data
));
3883 renew_lease(calldata
->server
, calldata
->timestamp
);
3885 case -NFS4ERR_BAD_STATEID
:
3886 case -NFS4ERR_OLD_STATEID
:
3887 case -NFS4ERR_STALE_STATEID
:
3888 case -NFS4ERR_EXPIRED
:
3891 if (nfs4_async_handle_error(task
, calldata
->server
, NULL
) == -EAGAIN
)
3892 nfs_restart_rpc(task
,
3893 calldata
->server
->nfs_client
);
3897 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3899 struct nfs4_unlockdata
*calldata
= data
;
3901 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3903 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3904 /* Note: exit _without_ running nfs4_locku_done */
3905 task
->tk_action
= NULL
;
3908 calldata
->timestamp
= jiffies
;
3909 if (nfs4_setup_sequence(calldata
->server
->nfs_client
,
3910 &calldata
->arg
.seq_args
,
3911 &calldata
->res
.seq_res
, 1, task
))
3913 rpc_call_start(task
);
3916 static const struct rpc_call_ops nfs4_locku_ops
= {
3917 .rpc_call_prepare
= nfs4_locku_prepare
,
3918 .rpc_call_done
= nfs4_locku_done
,
3919 .rpc_release
= nfs4_locku_release_calldata
,
3922 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3923 struct nfs_open_context
*ctx
,
3924 struct nfs4_lock_state
*lsp
,
3925 struct nfs_seqid
*seqid
)
3927 struct nfs4_unlockdata
*data
;
3928 struct rpc_message msg
= {
3929 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3930 .rpc_cred
= ctx
->cred
,
3932 struct rpc_task_setup task_setup_data
= {
3933 .rpc_client
= NFS_CLIENT(lsp
->ls_state
->inode
),
3934 .rpc_message
= &msg
,
3935 .callback_ops
= &nfs4_locku_ops
,
3936 .workqueue
= nfsiod_workqueue
,
3937 .flags
= RPC_TASK_ASYNC
,
3940 /* Ensure this is an unlock - when canceling a lock, the
3941 * canceled lock is passed in, and it won't be an unlock.
3943 fl
->fl_type
= F_UNLCK
;
3945 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3947 nfs_free_seqid(seqid
);
3948 return ERR_PTR(-ENOMEM
);
3951 msg
.rpc_argp
= &data
->arg
,
3952 msg
.rpc_resp
= &data
->res
,
3953 task_setup_data
.callback_data
= data
;
3954 return rpc_run_task(&task_setup_data
);
3957 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3959 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3960 struct nfs_seqid
*seqid
;
3961 struct nfs4_lock_state
*lsp
;
3962 struct rpc_task
*task
;
3964 unsigned char fl_flags
= request
->fl_flags
;
3966 status
= nfs4_set_lock_state(state
, request
);
3967 /* Unlock _before_ we do the RPC call */
3968 request
->fl_flags
|= FL_EXISTS
;
3969 down_read(&nfsi
->rwsem
);
3970 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
) {
3971 up_read(&nfsi
->rwsem
);
3974 up_read(&nfsi
->rwsem
);
3977 /* Is this a delegated lock? */
3978 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3980 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3981 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3985 task
= nfs4_do_unlck(request
, nfs_file_open_context(request
->fl_file
), lsp
, seqid
);
3986 status
= PTR_ERR(task
);
3989 status
= nfs4_wait_for_completion_rpc_task(task
);
3992 request
->fl_flags
= fl_flags
;
3996 struct nfs4_lockdata
{
3997 struct nfs_lock_args arg
;
3998 struct nfs_lock_res res
;
3999 struct nfs4_lock_state
*lsp
;
4000 struct nfs_open_context
*ctx
;
4001 struct file_lock fl
;
4002 unsigned long timestamp
;
4005 struct nfs_server
*server
;
4008 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
4009 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
4011 struct nfs4_lockdata
*p
;
4012 struct inode
*inode
= lsp
->ls_state
->inode
;
4013 struct nfs_server
*server
= NFS_SERVER(inode
);
4015 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
4019 p
->arg
.fh
= NFS_FH(inode
);
4021 p
->arg
.open_seqid
= nfs_alloc_seqid(&lsp
->ls_state
->owner
->so_seqid
);
4022 if (p
->arg
.open_seqid
== NULL
)
4024 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
4025 if (p
->arg
.lock_seqid
== NULL
)
4026 goto out_free_seqid
;
4027 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
4028 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
4029 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
4030 p
->res
.lock_seqid
= p
->arg
.lock_seqid
;
4031 p
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
4034 atomic_inc(&lsp
->ls_count
);
4035 p
->ctx
= get_nfs_open_context(ctx
);
4036 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
4039 nfs_free_seqid(p
->arg
.open_seqid
);
4045 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
4047 struct nfs4_lockdata
*data
= calldata
;
4048 struct nfs4_state
*state
= data
->lsp
->ls_state
;
4050 dprintk("%s: begin!\n", __func__
);
4051 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
4053 /* Do we need to do an open_to_lock_owner? */
4054 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
4055 if (nfs_wait_on_sequence(data
->arg
.open_seqid
, task
) != 0)
4057 data
->arg
.open_stateid
= &state
->stateid
;
4058 data
->arg
.new_lock_owner
= 1;
4059 data
->res
.open_seqid
= data
->arg
.open_seqid
;
4061 data
->arg
.new_lock_owner
= 0;
4062 data
->timestamp
= jiffies
;
4063 if (nfs4_setup_sequence(data
->server
->nfs_client
, &data
->arg
.seq_args
,
4064 &data
->res
.seq_res
, 1, task
))
4066 rpc_call_start(task
);
4067 dprintk("%s: done!, ret = %d\n", __func__
, data
->rpc_status
);
4070 static void nfs4_recover_lock_prepare(struct rpc_task
*task
, void *calldata
)
4072 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
4073 nfs4_lock_prepare(task
, calldata
);
4076 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
4078 struct nfs4_lockdata
*data
= calldata
;
4080 dprintk("%s: begin!\n", __func__
);
4082 nfs4_sequence_done(data
->server
, &data
->res
.seq_res
,
4085 data
->rpc_status
= task
->tk_status
;
4086 if (RPC_ASSASSINATED(task
))
4088 if (data
->arg
.new_lock_owner
!= 0) {
4089 if (data
->rpc_status
== 0)
4090 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
4094 if (data
->rpc_status
== 0) {
4095 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
4096 sizeof(data
->lsp
->ls_stateid
.data
));
4097 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
4098 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
4101 dprintk("%s: done, ret = %d!\n", __func__
, data
->rpc_status
);
4104 static void nfs4_lock_release(void *calldata
)
4106 struct nfs4_lockdata
*data
= calldata
;
4108 dprintk("%s: begin!\n", __func__
);
4109 nfs_free_seqid(data
->arg
.open_seqid
);
4110 if (data
->cancelled
!= 0) {
4111 struct rpc_task
*task
;
4112 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
4113 data
->arg
.lock_seqid
);
4116 dprintk("%s: cancelling lock!\n", __func__
);
4118 nfs_free_seqid(data
->arg
.lock_seqid
);
4119 nfs4_put_lock_state(data
->lsp
);
4120 put_nfs_open_context(data
->ctx
);
4122 dprintk("%s: done!\n", __func__
);
4125 static const struct rpc_call_ops nfs4_lock_ops
= {
4126 .rpc_call_prepare
= nfs4_lock_prepare
,
4127 .rpc_call_done
= nfs4_lock_done
,
4128 .rpc_release
= nfs4_lock_release
,
4131 static const struct rpc_call_ops nfs4_recover_lock_ops
= {
4132 .rpc_call_prepare
= nfs4_recover_lock_prepare
,
4133 .rpc_call_done
= nfs4_lock_done
,
4134 .rpc_release
= nfs4_lock_release
,
4137 static void nfs4_handle_setlk_error(struct nfs_server
*server
, struct nfs4_lock_state
*lsp
, int new_lock_owner
, int error
)
4139 struct nfs_client
*clp
= server
->nfs_client
;
4140 struct nfs4_state
*state
= lsp
->ls_state
;
4143 case -NFS4ERR_ADMIN_REVOKED
:
4144 case -NFS4ERR_BAD_STATEID
:
4145 case -NFS4ERR_EXPIRED
:
4146 if (new_lock_owner
!= 0 ||
4147 (lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) != 0)
4148 nfs4_state_mark_reclaim_nograce(clp
, state
);
4149 lsp
->ls_seqid
.flags
&= ~NFS_SEQID_CONFIRMED
;
4151 case -NFS4ERR_STALE_STATEID
:
4152 if (new_lock_owner
!= 0 ||
4153 (lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) != 0)
4154 nfs4_state_mark_reclaim_reboot(clp
, state
);
4155 lsp
->ls_seqid
.flags
&= ~NFS_SEQID_CONFIRMED
;
4159 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int recovery_type
)
4161 struct nfs4_lockdata
*data
;
4162 struct rpc_task
*task
;
4163 struct rpc_message msg
= {
4164 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
4165 .rpc_cred
= state
->owner
->so_cred
,
4167 struct rpc_task_setup task_setup_data
= {
4168 .rpc_client
= NFS_CLIENT(state
->inode
),
4169 .rpc_message
= &msg
,
4170 .callback_ops
= &nfs4_lock_ops
,
4171 .workqueue
= nfsiod_workqueue
,
4172 .flags
= RPC_TASK_ASYNC
,
4176 dprintk("%s: begin!\n", __func__
);
4177 data
= nfs4_alloc_lockdata(fl
, nfs_file_open_context(fl
->fl_file
),
4178 fl
->fl_u
.nfs4_fl
.owner
);
4182 data
->arg
.block
= 1;
4183 if (recovery_type
> NFS_LOCK_NEW
) {
4184 if (recovery_type
== NFS_LOCK_RECLAIM
)
4185 data
->arg
.reclaim
= NFS_LOCK_RECLAIM
;
4186 task_setup_data
.callback_ops
= &nfs4_recover_lock_ops
;
4188 msg
.rpc_argp
= &data
->arg
,
4189 msg
.rpc_resp
= &data
->res
,
4190 task_setup_data
.callback_data
= data
;
4191 task
= rpc_run_task(&task_setup_data
);
4193 return PTR_ERR(task
);
4194 ret
= nfs4_wait_for_completion_rpc_task(task
);
4196 ret
= data
->rpc_status
;
4198 nfs4_handle_setlk_error(data
->server
, data
->lsp
,
4199 data
->arg
.new_lock_owner
, ret
);
4201 data
->cancelled
= 1;
4203 dprintk("%s: done, ret = %d!\n", __func__
, ret
);
4207 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
4209 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4210 struct nfs4_exception exception
= { };
4214 /* Cache the lock if possible... */
4215 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
4217 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, NFS_LOCK_RECLAIM
);
4218 if (err
!= -NFS4ERR_DELAY
&& err
!= -EKEYEXPIRED
)
4220 nfs4_handle_exception(server
, err
, &exception
);
4221 } while (exception
.retry
);
4225 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
4227 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4228 struct nfs4_exception exception
= { };
4231 err
= nfs4_set_lock_state(state
, request
);
4235 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
4237 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, NFS_LOCK_EXPIRED
);
4241 case -NFS4ERR_GRACE
:
4242 case -NFS4ERR_DELAY
:
4244 nfs4_handle_exception(server
, err
, &exception
);
4247 } while (exception
.retry
);
4252 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4254 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
4255 unsigned char fl_flags
= request
->fl_flags
;
4256 int status
= -ENOLCK
;
4258 if ((fl_flags
& FL_POSIX
) &&
4259 !test_bit(NFS_STATE_POSIX_LOCKS
, &state
->flags
))
4261 /* Is this a delegated open? */
4262 status
= nfs4_set_lock_state(state
, request
);
4265 request
->fl_flags
|= FL_ACCESS
;
4266 status
= do_vfs_lock(request
->fl_file
, request
);
4269 down_read(&nfsi
->rwsem
);
4270 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
4271 /* Yes: cache locks! */
4272 /* ...but avoid races with delegation recall... */
4273 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
4274 status
= do_vfs_lock(request
->fl_file
, request
);
4277 status
= _nfs4_do_setlk(state
, cmd
, request
, NFS_LOCK_NEW
);
4280 /* Note: we always want to sleep here! */
4281 request
->fl_flags
= fl_flags
| FL_SLEEP
;
4282 if (do_vfs_lock(request
->fl_file
, request
) < 0)
4283 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __func__
);
4285 up_read(&nfsi
->rwsem
);
4287 request
->fl_flags
= fl_flags
;
4291 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4293 struct nfs4_exception exception
= { };
4297 err
= _nfs4_proc_setlk(state
, cmd
, request
);
4298 if (err
== -NFS4ERR_DENIED
)
4300 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
4302 } while (exception
.retry
);
4307 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
4309 struct nfs_open_context
*ctx
;
4310 struct nfs4_state
*state
;
4311 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
4314 /* verify open state */
4315 ctx
= nfs_file_open_context(filp
);
4318 if (request
->fl_start
< 0 || request
->fl_end
< 0)
4321 if (IS_GETLK(cmd
)) {
4323 return nfs4_proc_getlk(state
, F_GETLK
, request
);
4327 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
4330 if (request
->fl_type
== F_UNLCK
) {
4332 return nfs4_proc_unlck(state
, cmd
, request
);
4339 status
= nfs4_proc_setlk(state
, cmd
, request
);
4340 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
4342 timeout
= nfs4_set_lock_task_retry(timeout
);
4343 status
= -ERESTARTSYS
;
4346 } while(status
< 0);
4350 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
4352 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4353 struct nfs4_exception exception
= { };
4356 err
= nfs4_set_lock_state(state
, fl
);
4360 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, NFS_LOCK_NEW
);
4363 printk(KERN_ERR
"%s: unhandled error %d.\n",
4368 case -NFS4ERR_EXPIRED
:
4369 case -NFS4ERR_STALE_CLIENTID
:
4370 case -NFS4ERR_STALE_STATEID
:
4371 case -NFS4ERR_BADSESSION
:
4372 case -NFS4ERR_BADSLOT
:
4373 case -NFS4ERR_BAD_HIGH_SLOT
:
4374 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
4375 case -NFS4ERR_DEADSESSION
:
4376 nfs4_schedule_state_recovery(server
->nfs_client
);
4380 * The show must go on: exit, but mark the
4381 * stateid as needing recovery.
4383 case -NFS4ERR_ADMIN_REVOKED
:
4384 case -NFS4ERR_BAD_STATEID
:
4385 case -NFS4ERR_OPENMODE
:
4386 nfs4_state_mark_reclaim_nograce(server
->nfs_client
, state
);
4390 case -NFS4ERR_DENIED
:
4391 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4394 case -NFS4ERR_DELAY
:
4398 err
= nfs4_handle_exception(server
, err
, &exception
);
4399 } while (exception
.retry
);
4404 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4406 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
4407 size_t buflen
, int flags
)
4409 struct inode
*inode
= dentry
->d_inode
;
4411 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
4414 return nfs4_proc_set_acl(inode
, buf
, buflen
);
4417 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4418 * and that's what we'll do for e.g. user attributes that haven't been set.
4419 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4420 * attributes in kernel-managed attribute namespaces. */
4421 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
4424 struct inode
*inode
= dentry
->d_inode
;
4426 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
4429 return nfs4_proc_get_acl(inode
, buf
, buflen
);
4432 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
4434 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
4436 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
4438 if (buf
&& buflen
< len
)
4441 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
4445 static void nfs_fixup_referral_attributes(struct nfs_fattr
*fattr
)
4447 if (!((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) &&
4448 (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
4449 (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)))
4452 fattr
->valid
|= NFS_ATTR_FATTR_TYPE
| NFS_ATTR_FATTR_MODE
|
4453 NFS_ATTR_FATTR_NLINK
;
4454 fattr
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
4458 int nfs4_proc_fs_locations(struct inode
*dir
, const struct qstr
*name
,
4459 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
4461 struct nfs_server
*server
= NFS_SERVER(dir
);
4463 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
4464 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
4466 struct nfs4_fs_locations_arg args
= {
4467 .dir_fh
= NFS_FH(dir
),
4472 struct nfs4_fs_locations_res res
= {
4473 .fs_locations
= fs_locations
,
4475 struct rpc_message msg
= {
4476 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
4482 dprintk("%s: start\n", __func__
);
4483 nfs_fattr_init(&fs_locations
->fattr
);
4484 fs_locations
->server
= server
;
4485 fs_locations
->nlocations
= 0;
4486 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
4487 nfs_fixup_referral_attributes(&fs_locations
->fattr
);
4488 dprintk("%s: returned status = %d\n", __func__
, status
);
4492 #ifdef CONFIG_NFS_V4_1
4494 * nfs4_proc_exchange_id()
4496 * Since the clientid has expired, all compounds using sessions
4497 * associated with the stale clientid will be returning
4498 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4499 * be in some phase of session reset.
4501 int nfs4_proc_exchange_id(struct nfs_client
*clp
, struct rpc_cred
*cred
)
4503 nfs4_verifier verifier
;
4504 struct nfs41_exchange_id_args args
= {
4506 .flags
= clp
->cl_exchange_flags
,
4508 struct nfs41_exchange_id_res res
= {
4512 struct rpc_message msg
= {
4513 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_EXCHANGE_ID
],
4520 dprintk("--> %s\n", __func__
);
4521 BUG_ON(clp
== NULL
);
4523 /* Remove server-only flags */
4524 args
.flags
&= ~EXCHGID4_FLAG_CONFIRMED_R
;
4526 p
= (u32
*)verifier
.data
;
4527 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
4528 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
4529 args
.verifier
= &verifier
;
4532 args
.id_len
= scnprintf(args
.id
, sizeof(args
.id
),
4535 rpc_peeraddr2str(clp
->cl_rpcclient
,
4537 clp
->cl_id_uniquifier
);
4539 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
4541 if (status
!= -NFS4ERR_CLID_INUSE
)
4547 if (++clp
->cl_id_uniquifier
== 0)
4551 dprintk("<-- %s status= %d\n", __func__
, status
);
4555 struct nfs4_get_lease_time_data
{
4556 struct nfs4_get_lease_time_args
*args
;
4557 struct nfs4_get_lease_time_res
*res
;
4558 struct nfs_client
*clp
;
4561 static void nfs4_get_lease_time_prepare(struct rpc_task
*task
,
4565 struct nfs4_get_lease_time_data
*data
=
4566 (struct nfs4_get_lease_time_data
*)calldata
;
4568 dprintk("--> %s\n", __func__
);
4569 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
4570 /* just setup sequence, do not trigger session recovery
4571 since we're invoked within one */
4572 ret
= nfs41_setup_sequence(data
->clp
->cl_session
,
4573 &data
->args
->la_seq_args
,
4574 &data
->res
->lr_seq_res
, 0, task
);
4576 BUG_ON(ret
== -EAGAIN
);
4577 rpc_call_start(task
);
4578 dprintk("<-- %s\n", __func__
);
4582 * Called from nfs4_state_manager thread for session setup, so don't recover
4583 * from sequence operation or clientid errors.
4585 static void nfs4_get_lease_time_done(struct rpc_task
*task
, void *calldata
)
4587 struct nfs4_get_lease_time_data
*data
=
4588 (struct nfs4_get_lease_time_data
*)calldata
;
4590 dprintk("--> %s\n", __func__
);
4591 nfs41_sequence_done(data
->clp
, &data
->res
->lr_seq_res
, task
->tk_status
);
4592 switch (task
->tk_status
) {
4593 case -NFS4ERR_DELAY
:
4594 case -NFS4ERR_GRACE
:
4596 dprintk("%s Retry: tk_status %d\n", __func__
, task
->tk_status
);
4597 rpc_delay(task
, NFS4_POLL_RETRY_MIN
);
4598 task
->tk_status
= 0;
4599 nfs_restart_rpc(task
, data
->clp
);
4602 dprintk("<-- %s\n", __func__
);
4605 struct rpc_call_ops nfs4_get_lease_time_ops
= {
4606 .rpc_call_prepare
= nfs4_get_lease_time_prepare
,
4607 .rpc_call_done
= nfs4_get_lease_time_done
,
4610 int nfs4_proc_get_lease_time(struct nfs_client
*clp
, struct nfs_fsinfo
*fsinfo
)
4612 struct rpc_task
*task
;
4613 struct nfs4_get_lease_time_args args
;
4614 struct nfs4_get_lease_time_res res
= {
4615 .lr_fsinfo
= fsinfo
,
4617 struct nfs4_get_lease_time_data data
= {
4622 struct rpc_message msg
= {
4623 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GET_LEASE_TIME
],
4627 struct rpc_task_setup task_setup
= {
4628 .rpc_client
= clp
->cl_rpcclient
,
4629 .rpc_message
= &msg
,
4630 .callback_ops
= &nfs4_get_lease_time_ops
,
4631 .callback_data
= &data
4635 res
.lr_seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
4636 dprintk("--> %s\n", __func__
);
4637 task
= rpc_run_task(&task_setup
);
4640 status
= PTR_ERR(task
);
4642 status
= task
->tk_status
;
4645 dprintk("<-- %s return %d\n", __func__
, status
);
4651 * Reset a slot table
4653 static int nfs4_reset_slot_table(struct nfs4_slot_table
*tbl
, u32 max_reqs
,
4656 struct nfs4_slot
*new = NULL
;
4660 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__
,
4661 max_reqs
, tbl
->max_slots
);
4663 /* Does the newly negotiated max_reqs match the existing slot table? */
4664 if (max_reqs
!= tbl
->max_slots
) {
4666 new = kmalloc(max_reqs
* sizeof(struct nfs4_slot
),
4673 spin_lock(&tbl
->slot_tbl_lock
);
4676 tbl
->max_slots
= max_reqs
;
4678 for (i
= 0; i
< tbl
->max_slots
; ++i
)
4679 tbl
->slots
[i
].seq_nr
= ivalue
;
4680 spin_unlock(&tbl
->slot_tbl_lock
);
4681 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__
,
4682 tbl
, tbl
->slots
, tbl
->max_slots
);
4684 dprintk("<-- %s: return %d\n", __func__
, ret
);
4689 * Reset the forechannel and backchannel slot tables
4691 static int nfs4_reset_slot_tables(struct nfs4_session
*session
)
4695 status
= nfs4_reset_slot_table(&session
->fc_slot_table
,
4696 session
->fc_attrs
.max_reqs
, 1);
4700 status
= nfs4_reset_slot_table(&session
->bc_slot_table
,
4701 session
->bc_attrs
.max_reqs
, 0);
4705 /* Destroy the slot table */
4706 static void nfs4_destroy_slot_tables(struct nfs4_session
*session
)
4708 if (session
->fc_slot_table
.slots
!= NULL
) {
4709 kfree(session
->fc_slot_table
.slots
);
4710 session
->fc_slot_table
.slots
= NULL
;
4712 if (session
->bc_slot_table
.slots
!= NULL
) {
4713 kfree(session
->bc_slot_table
.slots
);
4714 session
->bc_slot_table
.slots
= NULL
;
4720 * Initialize slot table
4722 static int nfs4_init_slot_table(struct nfs4_slot_table
*tbl
,
4723 int max_slots
, int ivalue
)
4725 struct nfs4_slot
*slot
;
4728 BUG_ON(max_slots
> NFS4_MAX_SLOT_TABLE
);
4730 dprintk("--> %s: max_reqs=%u\n", __func__
, max_slots
);
4732 slot
= kcalloc(max_slots
, sizeof(struct nfs4_slot
), GFP_KERNEL
);
4737 spin_lock(&tbl
->slot_tbl_lock
);
4738 tbl
->max_slots
= max_slots
;
4740 tbl
->highest_used_slotid
= -1; /* no slot is currently used */
4741 spin_unlock(&tbl
->slot_tbl_lock
);
4742 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__
,
4743 tbl
, tbl
->slots
, tbl
->max_slots
);
4745 dprintk("<-- %s: return %d\n", __func__
, ret
);
4750 * Initialize the forechannel and backchannel tables
4752 static int nfs4_init_slot_tables(struct nfs4_session
*session
)
4754 struct nfs4_slot_table
*tbl
;
4757 tbl
= &session
->fc_slot_table
;
4758 if (tbl
->slots
== NULL
) {
4759 status
= nfs4_init_slot_table(tbl
,
4760 session
->fc_attrs
.max_reqs
, 1);
4765 tbl
= &session
->bc_slot_table
;
4766 if (tbl
->slots
== NULL
) {
4767 status
= nfs4_init_slot_table(tbl
,
4768 session
->bc_attrs
.max_reqs
, 0);
4770 nfs4_destroy_slot_tables(session
);
4776 struct nfs4_session
*nfs4_alloc_session(struct nfs_client
*clp
)
4778 struct nfs4_session
*session
;
4779 struct nfs4_slot_table
*tbl
;
4781 session
= kzalloc(sizeof(struct nfs4_session
), GFP_KERNEL
);
4786 * The create session reply races with the server back
4787 * channel probe. Mark the client NFS_CS_SESSION_INITING
4788 * so that the client back channel can find the
4791 clp
->cl_cons_state
= NFS_CS_SESSION_INITING
;
4792 init_completion(&session
->complete
);
4794 tbl
= &session
->fc_slot_table
;
4795 tbl
->highest_used_slotid
= -1;
4796 spin_lock_init(&tbl
->slot_tbl_lock
);
4797 rpc_init_priority_wait_queue(&tbl
->slot_tbl_waitq
, "ForeChannel Slot table");
4799 tbl
= &session
->bc_slot_table
;
4800 tbl
->highest_used_slotid
= -1;
4801 spin_lock_init(&tbl
->slot_tbl_lock
);
4802 rpc_init_wait_queue(&tbl
->slot_tbl_waitq
, "BackChannel Slot table");
4808 void nfs4_destroy_session(struct nfs4_session
*session
)
4810 nfs4_proc_destroy_session(session
);
4811 dprintk("%s Destroy backchannel for xprt %p\n",
4812 __func__
, session
->clp
->cl_rpcclient
->cl_xprt
);
4813 xprt_destroy_backchannel(session
->clp
->cl_rpcclient
->cl_xprt
,
4814 NFS41_BC_MIN_CALLBACKS
);
4815 nfs4_destroy_slot_tables(session
);
4820 * Initialize the values to be used by the client in CREATE_SESSION
4821 * If nfs4_init_session set the fore channel request and response sizes,
4824 * Set the back channel max_resp_sz_cached to zero to force the client to
4825 * always set csa_cachethis to FALSE because the current implementation
4826 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4828 static void nfs4_init_channel_attrs(struct nfs41_create_session_args
*args
)
4830 struct nfs4_session
*session
= args
->client
->cl_session
;
4831 unsigned int mxrqst_sz
= session
->fc_attrs
.max_rqst_sz
,
4832 mxresp_sz
= session
->fc_attrs
.max_resp_sz
;
4835 mxrqst_sz
= NFS_MAX_FILE_IO_SIZE
;
4837 mxresp_sz
= NFS_MAX_FILE_IO_SIZE
;
4838 /* Fore channel attributes */
4839 args
->fc_attrs
.headerpadsz
= 0;
4840 args
->fc_attrs
.max_rqst_sz
= mxrqst_sz
;
4841 args
->fc_attrs
.max_resp_sz
= mxresp_sz
;
4842 args
->fc_attrs
.max_ops
= NFS4_MAX_OPS
;
4843 args
->fc_attrs
.max_reqs
= session
->clp
->cl_rpcclient
->cl_xprt
->max_reqs
;
4845 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4846 "max_ops=%u max_reqs=%u\n",
4848 args
->fc_attrs
.max_rqst_sz
, args
->fc_attrs
.max_resp_sz
,
4849 args
->fc_attrs
.max_ops
, args
->fc_attrs
.max_reqs
);
4851 /* Back channel attributes */
4852 args
->bc_attrs
.headerpadsz
= 0;
4853 args
->bc_attrs
.max_rqst_sz
= PAGE_SIZE
;
4854 args
->bc_attrs
.max_resp_sz
= PAGE_SIZE
;
4855 args
->bc_attrs
.max_resp_sz_cached
= 0;
4856 args
->bc_attrs
.max_ops
= NFS4_MAX_BACK_CHANNEL_OPS
;
4857 args
->bc_attrs
.max_reqs
= 1;
4859 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4860 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4862 args
->bc_attrs
.max_rqst_sz
, args
->bc_attrs
.max_resp_sz
,
4863 args
->bc_attrs
.max_resp_sz_cached
, args
->bc_attrs
.max_ops
,
4864 args
->bc_attrs
.max_reqs
);
4867 static int _verify_channel_attr(char *chan
, char *attr_name
, u32 sent
, u32 rcvd
)
4871 printk(KERN_WARNING
"%s: Session INVALID: %s channel %s increased. "
4872 "sent=%u rcvd=%u\n", __func__
, chan
, attr_name
, sent
, rcvd
);
4876 #define _verify_fore_channel_attr(_name_) \
4877 _verify_channel_attr("fore", #_name_, \
4878 args->fc_attrs._name_, \
4879 session->fc_attrs._name_)
4881 #define _verify_back_channel_attr(_name_) \
4882 _verify_channel_attr("back", #_name_, \
4883 args->bc_attrs._name_, \
4884 session->bc_attrs._name_)
4887 * The server is not allowed to increase the fore channel header pad size,
4888 * maximum response size, or maximum number of operations.
4890 * The back channel attributes are only negotiatied down: We send what the
4891 * (back channel) server insists upon.
4893 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args
*args
,
4894 struct nfs4_session
*session
)
4898 ret
|= _verify_fore_channel_attr(headerpadsz
);
4899 ret
|= _verify_fore_channel_attr(max_resp_sz
);
4900 ret
|= _verify_fore_channel_attr(max_ops
);
4902 ret
|= _verify_back_channel_attr(headerpadsz
);
4903 ret
|= _verify_back_channel_attr(max_rqst_sz
);
4904 ret
|= _verify_back_channel_attr(max_resp_sz
);
4905 ret
|= _verify_back_channel_attr(max_resp_sz_cached
);
4906 ret
|= _verify_back_channel_attr(max_ops
);
4907 ret
|= _verify_back_channel_attr(max_reqs
);
4912 static int _nfs4_proc_create_session(struct nfs_client
*clp
)
4914 struct nfs4_session
*session
= clp
->cl_session
;
4915 struct nfs41_create_session_args args
= {
4917 .cb_program
= NFS4_CALLBACK
,
4919 struct nfs41_create_session_res res
= {
4922 struct rpc_message msg
= {
4923 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE_SESSION
],
4929 nfs4_init_channel_attrs(&args
);
4930 args
.flags
= (SESSION4_PERSIST
| SESSION4_BACK_CHAN
);
4932 status
= rpc_call_sync(session
->clp
->cl_rpcclient
, &msg
, 0);
4935 /* Verify the session's negotiated channel_attrs values */
4936 status
= nfs4_verify_channel_attrs(&args
, session
);
4938 /* Increment the clientid slot sequence id */
4946 * Issues a CREATE_SESSION operation to the server.
4947 * It is the responsibility of the caller to verify the session is
4948 * expired before calling this routine.
4950 int nfs4_proc_create_session(struct nfs_client
*clp
)
4954 struct nfs4_session
*session
= clp
->cl_session
;
4956 dprintk("--> %s clp=%p session=%p\n", __func__
, clp
, session
);
4958 status
= _nfs4_proc_create_session(clp
);
4962 /* Init and reset the fore channel */
4963 status
= nfs4_init_slot_tables(session
);
4964 dprintk("slot table initialization returned %d\n", status
);
4967 status
= nfs4_reset_slot_tables(session
);
4968 dprintk("slot table reset returned %d\n", status
);
4972 ptr
= (unsigned *)&session
->sess_id
.data
[0];
4973 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__
,
4974 clp
->cl_seqid
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
4976 dprintk("<-- %s\n", __func__
);
4981 * Issue the over-the-wire RPC DESTROY_SESSION.
4982 * The caller must serialize access to this routine.
4984 int nfs4_proc_destroy_session(struct nfs4_session
*session
)
4987 struct rpc_message msg
;
4989 dprintk("--> nfs4_proc_destroy_session\n");
4991 /* session is still being setup */
4992 if (session
->clp
->cl_cons_state
!= NFS_CS_READY
)
4995 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DESTROY_SESSION
];
4996 msg
.rpc_argp
= session
;
4997 msg
.rpc_resp
= NULL
;
4998 msg
.rpc_cred
= NULL
;
4999 status
= rpc_call_sync(session
->clp
->cl_rpcclient
, &msg
, 0);
5003 "Got error %d from the server on DESTROY_SESSION. "
5004 "Session has been destroyed regardless...\n", status
);
5006 dprintk("<-- nfs4_proc_destroy_session\n");
5010 int nfs4_init_session(struct nfs_server
*server
)
5012 struct nfs_client
*clp
= server
->nfs_client
;
5013 struct nfs4_session
*session
;
5014 unsigned int rsize
, wsize
;
5017 if (!nfs4_has_session(clp
))
5020 rsize
= server
->rsize
;
5022 rsize
= NFS_MAX_FILE_IO_SIZE
;
5023 wsize
= server
->wsize
;
5025 wsize
= NFS_MAX_FILE_IO_SIZE
;
5027 session
= clp
->cl_session
;
5028 session
->fc_attrs
.max_rqst_sz
= wsize
+ nfs41_maxwrite_overhead
;
5029 session
->fc_attrs
.max_resp_sz
= rsize
+ nfs41_maxread_overhead
;
5031 ret
= nfs4_recover_expired_lease(server
);
5033 ret
= nfs4_check_client_ready(clp
);
5038 * Renew the cl_session lease.
5040 static int nfs4_proc_sequence(struct nfs_client
*clp
, struct rpc_cred
*cred
)
5042 struct nfs4_sequence_args args
;
5043 struct nfs4_sequence_res res
;
5045 struct rpc_message msg
= {
5046 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SEQUENCE
],
5052 args
.sa_cache_this
= 0;
5054 return nfs4_call_sync_sequence(clp
, clp
->cl_rpcclient
, &msg
, &args
,
5055 &res
, args
.sa_cache_this
, 1);
5058 static void nfs41_sequence_release(void *data
)
5060 struct nfs_client
*clp
= (struct nfs_client
*)data
;
5062 if (atomic_read(&clp
->cl_count
) > 1)
5063 nfs4_schedule_state_renewal(clp
);
5064 nfs_put_client(clp
);
5067 static void nfs41_sequence_call_done(struct rpc_task
*task
, void *data
)
5069 struct nfs_client
*clp
= (struct nfs_client
*)data
;
5071 nfs41_sequence_done(clp
, task
->tk_msg
.rpc_resp
, task
->tk_status
);
5073 if (task
->tk_status
< 0) {
5074 dprintk("%s ERROR %d\n", __func__
, task
->tk_status
);
5075 if (atomic_read(&clp
->cl_count
) == 1)
5078 if (_nfs4_async_handle_error(task
, NULL
, clp
, NULL
)
5080 nfs_restart_rpc(task
, clp
);
5084 dprintk("%s rpc_cred %p\n", __func__
, task
->tk_msg
.rpc_cred
);
5086 kfree(task
->tk_msg
.rpc_argp
);
5087 kfree(task
->tk_msg
.rpc_resp
);
5089 dprintk("<-- %s\n", __func__
);
5092 static void nfs41_sequence_prepare(struct rpc_task
*task
, void *data
)
5094 struct nfs_client
*clp
;
5095 struct nfs4_sequence_args
*args
;
5096 struct nfs4_sequence_res
*res
;
5098 clp
= (struct nfs_client
*)data
;
5099 args
= task
->tk_msg
.rpc_argp
;
5100 res
= task
->tk_msg
.rpc_resp
;
5102 if (nfs4_setup_sequence(clp
, args
, res
, 0, task
))
5104 rpc_call_start(task
);
5107 static const struct rpc_call_ops nfs41_sequence_ops
= {
5108 .rpc_call_done
= nfs41_sequence_call_done
,
5109 .rpc_call_prepare
= nfs41_sequence_prepare
,
5110 .rpc_release
= nfs41_sequence_release
,
5113 static int nfs41_proc_async_sequence(struct nfs_client
*clp
,
5114 struct rpc_cred
*cred
)
5116 struct nfs4_sequence_args
*args
;
5117 struct nfs4_sequence_res
*res
;
5118 struct rpc_message msg
= {
5119 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SEQUENCE
],
5123 if (!atomic_inc_not_zero(&clp
->cl_count
))
5125 args
= kzalloc(sizeof(*args
), GFP_KERNEL
);
5126 res
= kzalloc(sizeof(*res
), GFP_KERNEL
);
5127 if (!args
|| !res
) {
5130 nfs_put_client(clp
);
5133 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
5134 msg
.rpc_argp
= args
;
5137 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
5138 &nfs41_sequence_ops
, (void *)clp
);
5141 struct nfs4_reclaim_complete_data
{
5142 struct nfs_client
*clp
;
5143 struct nfs41_reclaim_complete_args arg
;
5144 struct nfs41_reclaim_complete_res res
;
5147 static void nfs4_reclaim_complete_prepare(struct rpc_task
*task
, void *data
)
5149 struct nfs4_reclaim_complete_data
*calldata
= data
;
5151 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
5152 if (nfs4_setup_sequence(calldata
->clp
, &calldata
->arg
.seq_args
,
5153 &calldata
->res
.seq_res
, 0, task
))
5156 rpc_call_start(task
);
5159 static void nfs4_reclaim_complete_done(struct rpc_task
*task
, void *data
)
5161 struct nfs4_reclaim_complete_data
*calldata
= data
;
5162 struct nfs_client
*clp
= calldata
->clp
;
5163 struct nfs4_sequence_res
*res
= &calldata
->res
.seq_res
;
5165 dprintk("--> %s\n", __func__
);
5166 nfs41_sequence_done(clp
, res
, task
->tk_status
);
5167 switch (task
->tk_status
) {
5169 case -NFS4ERR_COMPLETE_ALREADY
:
5171 case -NFS4ERR_BADSESSION
:
5172 case -NFS4ERR_DEADSESSION
:
5174 * Handle the session error, but do not retry the operation, as
5175 * we have no way of telling whether the clientid had to be
5176 * reset before we got our reply. If reset, a new wave of
5177 * reclaim operations will follow, containing their own reclaim
5178 * complete. We don't want our retry to get on the way of
5179 * recovery by incorrectly indicating to the server that we're
5180 * done reclaiming state since the process had to be restarted.
5182 _nfs4_async_handle_error(task
, NULL
, clp
, NULL
);
5185 if (_nfs4_async_handle_error(
5186 task
, NULL
, clp
, NULL
) == -EAGAIN
) {
5187 rpc_restart_call_prepare(task
);
5192 dprintk("<-- %s\n", __func__
);
5195 static void nfs4_free_reclaim_complete_data(void *data
)
5197 struct nfs4_reclaim_complete_data
*calldata
= data
;
5202 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops
= {
5203 .rpc_call_prepare
= nfs4_reclaim_complete_prepare
,
5204 .rpc_call_done
= nfs4_reclaim_complete_done
,
5205 .rpc_release
= nfs4_free_reclaim_complete_data
,
5209 * Issue a global reclaim complete.
5211 static int nfs41_proc_reclaim_complete(struct nfs_client
*clp
)
5213 struct nfs4_reclaim_complete_data
*calldata
;
5214 struct rpc_task
*task
;
5215 struct rpc_message msg
= {
5216 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RECLAIM_COMPLETE
],
5218 struct rpc_task_setup task_setup_data
= {
5219 .rpc_client
= clp
->cl_rpcclient
,
5220 .rpc_message
= &msg
,
5221 .callback_ops
= &nfs4_reclaim_complete_call_ops
,
5222 .flags
= RPC_TASK_ASYNC
,
5224 int status
= -ENOMEM
;
5226 dprintk("--> %s\n", __func__
);
5227 calldata
= kzalloc(sizeof(*calldata
), GFP_KERNEL
);
5228 if (calldata
== NULL
)
5230 calldata
->clp
= clp
;
5231 calldata
->arg
.one_fs
= 0;
5232 calldata
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
5234 msg
.rpc_argp
= &calldata
->arg
;
5235 msg
.rpc_resp
= &calldata
->res
;
5236 task_setup_data
.callback_data
= calldata
;
5237 task
= rpc_run_task(&task_setup_data
);
5239 status
= PTR_ERR(task
);
5245 dprintk("<-- %s status=%d\n", __func__
, status
);
5248 #endif /* CONFIG_NFS_V4_1 */
5250 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops
= {
5251 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
5252 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
5253 .recover_open
= nfs4_open_reclaim
,
5254 .recover_lock
= nfs4_lock_reclaim
,
5255 .establish_clid
= nfs4_init_clientid
,
5256 .get_clid_cred
= nfs4_get_setclientid_cred
,
5259 #if defined(CONFIG_NFS_V4_1)
5260 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops
= {
5261 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
5262 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
5263 .recover_open
= nfs4_open_reclaim
,
5264 .recover_lock
= nfs4_lock_reclaim
,
5265 .establish_clid
= nfs41_init_clientid
,
5266 .get_clid_cred
= nfs4_get_exchange_id_cred
,
5267 .reclaim_complete
= nfs41_proc_reclaim_complete
,
5269 #endif /* CONFIG_NFS_V4_1 */
5271 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops
= {
5272 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
5273 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
5274 .recover_open
= nfs4_open_expired
,
5275 .recover_lock
= nfs4_lock_expired
,
5276 .establish_clid
= nfs4_init_clientid
,
5277 .get_clid_cred
= nfs4_get_setclientid_cred
,
5280 #if defined(CONFIG_NFS_V4_1)
5281 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops
= {
5282 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
5283 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
5284 .recover_open
= nfs4_open_expired
,
5285 .recover_lock
= nfs4_lock_expired
,
5286 .establish_clid
= nfs41_init_clientid
,
5287 .get_clid_cred
= nfs4_get_exchange_id_cred
,
5289 #endif /* CONFIG_NFS_V4_1 */
5291 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops
= {
5292 .sched_state_renewal
= nfs4_proc_async_renew
,
5293 .get_state_renewal_cred_locked
= nfs4_get_renew_cred_locked
,
5294 .renew_lease
= nfs4_proc_renew
,
5297 #if defined(CONFIG_NFS_V4_1)
5298 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops
= {
5299 .sched_state_renewal
= nfs41_proc_async_sequence
,
5300 .get_state_renewal_cred_locked
= nfs4_get_machine_cred_locked
,
5301 .renew_lease
= nfs4_proc_sequence
,
5306 * Per minor version reboot and network partition recovery ops
5309 struct nfs4_state_recovery_ops
*nfs4_reboot_recovery_ops
[] = {
5310 &nfs40_reboot_recovery_ops
,
5311 #if defined(CONFIG_NFS_V4_1)
5312 &nfs41_reboot_recovery_ops
,
5316 struct nfs4_state_recovery_ops
*nfs4_nograce_recovery_ops
[] = {
5317 &nfs40_nograce_recovery_ops
,
5318 #if defined(CONFIG_NFS_V4_1)
5319 &nfs41_nograce_recovery_ops
,
5323 struct nfs4_state_maintenance_ops
*nfs4_state_renewal_ops
[] = {
5324 &nfs40_state_renewal_ops
,
5325 #if defined(CONFIG_NFS_V4_1)
5326 &nfs41_state_renewal_ops
,
5330 static const struct inode_operations nfs4_file_inode_operations
= {
5331 .permission
= nfs_permission
,
5332 .getattr
= nfs_getattr
,
5333 .setattr
= nfs_setattr
,
5334 .getxattr
= nfs4_getxattr
,
5335 .setxattr
= nfs4_setxattr
,
5336 .listxattr
= nfs4_listxattr
,
5339 const struct nfs_rpc_ops nfs_v4_clientops
= {
5340 .version
= 4, /* protocol version */
5341 .dentry_ops
= &nfs4_dentry_operations
,
5342 .dir_inode_ops
= &nfs4_dir_inode_operations
,
5343 .file_inode_ops
= &nfs4_file_inode_operations
,
5344 .getroot
= nfs4_proc_get_root
,
5345 .getattr
= nfs4_proc_getattr
,
5346 .setattr
= nfs4_proc_setattr
,
5347 .lookupfh
= nfs4_proc_lookupfh
,
5348 .lookup
= nfs4_proc_lookup
,
5349 .access
= nfs4_proc_access
,
5350 .readlink
= nfs4_proc_readlink
,
5351 .create
= nfs4_proc_create
,
5352 .remove
= nfs4_proc_remove
,
5353 .unlink_setup
= nfs4_proc_unlink_setup
,
5354 .unlink_done
= nfs4_proc_unlink_done
,
5355 .rename
= nfs4_proc_rename
,
5356 .link
= nfs4_proc_link
,
5357 .symlink
= nfs4_proc_symlink
,
5358 .mkdir
= nfs4_proc_mkdir
,
5359 .rmdir
= nfs4_proc_remove
,
5360 .readdir
= nfs4_proc_readdir
,
5361 .mknod
= nfs4_proc_mknod
,
5362 .statfs
= nfs4_proc_statfs
,
5363 .fsinfo
= nfs4_proc_fsinfo
,
5364 .pathconf
= nfs4_proc_pathconf
,
5365 .set_capabilities
= nfs4_server_capabilities
,
5366 .decode_dirent
= nfs4_decode_dirent
,
5367 .read_setup
= nfs4_proc_read_setup
,
5368 .read_done
= nfs4_read_done
,
5369 .write_setup
= nfs4_proc_write_setup
,
5370 .write_done
= nfs4_write_done
,
5371 .commit_setup
= nfs4_proc_commit_setup
,
5372 .commit_done
= nfs4_commit_done
,
5373 .lock
= nfs4_proc_lock
,
5374 .clear_acl_cache
= nfs4_zap_acl_attr
,
5375 .close_context
= nfs4_close_context
,