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/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/nfs.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs_fs.h>
49 #include <linux/nfs_page.h>
50 #include <linux/nfs_mount.h>
51 #include <linux/namei.h>
52 #include <linux/mount.h>
53 #include <linux/module.h>
54 #include <linux/nfs_idmap.h>
55 #include <linux/sunrpc/bc_xprt.h>
56 #include <linux/xattr.h>
57 #include <linux/utsname.h>
58 #include <linux/freezer.h>
61 #include "delegation.h"
68 #define NFSDBG_FACILITY NFSDBG_PROC
70 #define NFS4_POLL_RETRY_MIN (HZ/10)
71 #define NFS4_POLL_RETRY_MAX (15*HZ)
73 #define NFS4_MAX_LOOP_ON_RECOVER (10)
76 static int _nfs4_proc_open(struct nfs4_opendata
*data
);
77 static int _nfs4_recover_proc_open(struct nfs4_opendata
*data
);
78 static int nfs4_do_fsinfo(struct nfs_server
*, struct nfs_fh
*, struct nfs_fsinfo
*);
79 static int nfs4_async_handle_error(struct rpc_task
*, const struct nfs_server
*, struct nfs4_state
*);
80 static void nfs_fixup_referral_attributes(struct nfs_fattr
*fattr
);
81 static int nfs4_proc_getattr(struct nfs_server
*, struct nfs_fh
*, struct nfs_fattr
*);
82 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
83 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
84 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
85 struct nfs4_state
*state
);
86 #ifdef CONFIG_NFS_V4_1
87 static int nfs41_test_stateid(struct nfs_server
*, nfs4_stateid
*);
88 static int nfs41_free_stateid(struct nfs_server
*, nfs4_stateid
*);
90 /* Prevent leaks of NFSv4 errors into userland */
91 static int nfs4_map_errors(int err
)
96 case -NFS4ERR_RESOURCE
:
98 case -NFS4ERR_WRONGSEC
:
100 case -NFS4ERR_BADOWNER
:
101 case -NFS4ERR_BADNAME
:
103 case -NFS4ERR_SHARE_DENIED
:
105 case -NFS4ERR_MINOR_VERS_MISMATCH
:
106 return -EPROTONOSUPPORT
;
108 dprintk("%s could not handle NFSv4 error %d\n",
116 * This is our standard bitmap for GETATTR requests.
118 const u32 nfs4_fattr_bitmap
[3] = {
120 | FATTR4_WORD0_CHANGE
123 | FATTR4_WORD0_FILEID
,
125 | FATTR4_WORD1_NUMLINKS
127 | FATTR4_WORD1_OWNER_GROUP
128 | FATTR4_WORD1_RAWDEV
129 | FATTR4_WORD1_SPACE_USED
130 | FATTR4_WORD1_TIME_ACCESS
131 | FATTR4_WORD1_TIME_METADATA
132 | FATTR4_WORD1_TIME_MODIFY
135 static const u32 nfs4_pnfs_open_bitmap
[3] = {
137 | FATTR4_WORD0_CHANGE
140 | FATTR4_WORD0_FILEID
,
142 | FATTR4_WORD1_NUMLINKS
144 | FATTR4_WORD1_OWNER_GROUP
145 | FATTR4_WORD1_RAWDEV
146 | FATTR4_WORD1_SPACE_USED
147 | FATTR4_WORD1_TIME_ACCESS
148 | FATTR4_WORD1_TIME_METADATA
149 | FATTR4_WORD1_TIME_MODIFY
,
150 FATTR4_WORD2_MDSTHRESHOLD
153 const u32 nfs4_statfs_bitmap
[2] = {
154 FATTR4_WORD0_FILES_AVAIL
155 | FATTR4_WORD0_FILES_FREE
156 | FATTR4_WORD0_FILES_TOTAL
,
157 FATTR4_WORD1_SPACE_AVAIL
158 | FATTR4_WORD1_SPACE_FREE
159 | FATTR4_WORD1_SPACE_TOTAL
162 const u32 nfs4_pathconf_bitmap
[2] = {
164 | FATTR4_WORD0_MAXNAME
,
168 const u32 nfs4_fsinfo_bitmap
[3] = { FATTR4_WORD0_MAXFILESIZE
169 | FATTR4_WORD0_MAXREAD
170 | FATTR4_WORD0_MAXWRITE
171 | FATTR4_WORD0_LEASE_TIME
,
172 FATTR4_WORD1_TIME_DELTA
173 | FATTR4_WORD1_FS_LAYOUT_TYPES
,
174 FATTR4_WORD2_LAYOUT_BLKSIZE
177 const u32 nfs4_fs_locations_bitmap
[2] = {
179 | FATTR4_WORD0_CHANGE
182 | FATTR4_WORD0_FILEID
183 | FATTR4_WORD0_FS_LOCATIONS
,
185 | FATTR4_WORD1_NUMLINKS
187 | FATTR4_WORD1_OWNER_GROUP
188 | FATTR4_WORD1_RAWDEV
189 | FATTR4_WORD1_SPACE_USED
190 | FATTR4_WORD1_TIME_ACCESS
191 | FATTR4_WORD1_TIME_METADATA
192 | FATTR4_WORD1_TIME_MODIFY
193 | FATTR4_WORD1_MOUNTED_ON_FILEID
196 static void nfs4_setup_readdir(u64 cookie
, __be32
*verifier
, struct dentry
*dentry
,
197 struct nfs4_readdir_arg
*readdir
)
201 BUG_ON(readdir
->count
< 80);
203 readdir
->cookie
= cookie
;
204 memcpy(&readdir
->verifier
, verifier
, sizeof(readdir
->verifier
));
209 memset(&readdir
->verifier
, 0, sizeof(readdir
->verifier
));
214 * NFSv4 servers do not return entries for '.' and '..'
215 * Therefore, we fake these entries here. We let '.'
216 * have cookie 0 and '..' have cookie 1. Note that
217 * when talking to the server, we always send cookie 0
220 start
= p
= kmap_atomic(*readdir
->pages
);
223 *p
++ = xdr_one
; /* next */
224 *p
++ = xdr_zero
; /* cookie, first word */
225 *p
++ = xdr_one
; /* cookie, second word */
226 *p
++ = xdr_one
; /* entry len */
227 memcpy(p
, ".\0\0\0", 4); /* entry */
229 *p
++ = xdr_one
; /* bitmap length */
230 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
231 *p
++ = htonl(8); /* attribute buffer length */
232 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_inode
));
235 *p
++ = xdr_one
; /* next */
236 *p
++ = xdr_zero
; /* cookie, first word */
237 *p
++ = xdr_two
; /* cookie, second word */
238 *p
++ = xdr_two
; /* entry len */
239 memcpy(p
, "..\0\0", 4); /* entry */
241 *p
++ = xdr_one
; /* bitmap length */
242 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
243 *p
++ = htonl(8); /* attribute buffer length */
244 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_parent
->d_inode
));
246 readdir
->pgbase
= (char *)p
- (char *)start
;
247 readdir
->count
-= readdir
->pgbase
;
248 kunmap_atomic(start
);
251 static int nfs4_wait_clnt_recover(struct nfs_client
*clp
)
257 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
,
258 nfs_wait_bit_killable
, TASK_KILLABLE
);
262 if (clp
->cl_cons_state
< 0)
263 return clp
->cl_cons_state
;
267 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
274 *timeout
= NFS4_POLL_RETRY_MIN
;
275 if (*timeout
> NFS4_POLL_RETRY_MAX
)
276 *timeout
= NFS4_POLL_RETRY_MAX
;
277 freezable_schedule_timeout_killable(*timeout
);
278 if (fatal_signal_pending(current
))
284 /* This is the error handling routine for processes that are allowed
287 static int nfs4_handle_exception(struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
289 struct nfs_client
*clp
= server
->nfs_client
;
290 struct nfs4_state
*state
= exception
->state
;
291 struct inode
*inode
= exception
->inode
;
294 exception
->retry
= 0;
298 case -NFS4ERR_OPENMODE
:
299 if (inode
&& nfs4_have_delegation(inode
, FMODE_READ
)) {
300 nfs4_inode_return_delegation(inode
);
301 exception
->retry
= 1;
306 nfs4_schedule_stateid_recovery(server
, state
);
307 goto wait_on_recovery
;
308 case -NFS4ERR_DELEG_REVOKED
:
309 case -NFS4ERR_ADMIN_REVOKED
:
310 case -NFS4ERR_BAD_STATEID
:
313 nfs_remove_bad_delegation(state
->inode
);
314 nfs4_schedule_stateid_recovery(server
, state
);
315 goto wait_on_recovery
;
316 case -NFS4ERR_EXPIRED
:
318 nfs4_schedule_stateid_recovery(server
, state
);
319 case -NFS4ERR_STALE_STATEID
:
320 case -NFS4ERR_STALE_CLIENTID
:
321 nfs4_schedule_lease_recovery(clp
);
322 goto wait_on_recovery
;
323 #if defined(CONFIG_NFS_V4_1)
324 case -NFS4ERR_BADSESSION
:
325 case -NFS4ERR_BADSLOT
:
326 case -NFS4ERR_BAD_HIGH_SLOT
:
327 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
328 case -NFS4ERR_DEADSESSION
:
329 case -NFS4ERR_SEQ_FALSE_RETRY
:
330 case -NFS4ERR_SEQ_MISORDERED
:
331 dprintk("%s ERROR: %d Reset session\n", __func__
,
333 nfs4_schedule_session_recovery(clp
->cl_session
, errorcode
);
334 exception
->retry
= 1;
336 #endif /* defined(CONFIG_NFS_V4_1) */
337 case -NFS4ERR_FILE_OPEN
:
338 if (exception
->timeout
> HZ
) {
339 /* We have retried a decent amount, time to
348 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
351 case -NFS4ERR_RETRY_UNCACHED_REP
:
352 case -NFS4ERR_OLD_STATEID
:
353 exception
->retry
= 1;
355 case -NFS4ERR_BADOWNER
:
356 /* The following works around a Linux server bug! */
357 case -NFS4ERR_BADNAME
:
358 if (server
->caps
& NFS_CAP_UIDGID_NOMAP
) {
359 server
->caps
&= ~NFS_CAP_UIDGID_NOMAP
;
360 exception
->retry
= 1;
361 printk(KERN_WARNING
"NFS: v4 server %s "
362 "does not accept raw "
364 "Reenabling the idmapper.\n",
365 server
->nfs_client
->cl_hostname
);
368 /* We failed to handle the error */
369 return nfs4_map_errors(ret
);
371 ret
= nfs4_wait_clnt_recover(clp
);
373 exception
->retry
= 1;
378 static void do_renew_lease(struct nfs_client
*clp
, unsigned long timestamp
)
380 spin_lock(&clp
->cl_lock
);
381 if (time_before(clp
->cl_last_renewal
,timestamp
))
382 clp
->cl_last_renewal
= timestamp
;
383 spin_unlock(&clp
->cl_lock
);
386 static void renew_lease(const struct nfs_server
*server
, unsigned long timestamp
)
388 do_renew_lease(server
->nfs_client
, timestamp
);
391 #if defined(CONFIG_NFS_V4_1)
394 * nfs4_free_slot - free a slot and efficiently update slot table.
396 * freeing a slot is trivially done by clearing its respective bit
398 * If the freed slotid equals highest_used_slotid we want to update it
399 * so that the server would be able to size down the slot table if needed,
400 * otherwise we know that the highest_used_slotid is still in use.
401 * When updating highest_used_slotid there may be "holes" in the bitmap
402 * so we need to scan down from highest_used_slotid to 0 looking for the now
403 * highest slotid in use.
404 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
406 * Must be called while holding tbl->slot_tbl_lock
409 nfs4_free_slot(struct nfs4_slot_table
*tbl
, u32 slotid
)
411 BUG_ON(slotid
>= NFS4_MAX_SLOT_TABLE
);
412 /* clear used bit in bitmap */
413 __clear_bit(slotid
, tbl
->used_slots
);
415 /* update highest_used_slotid when it is freed */
416 if (slotid
== tbl
->highest_used_slotid
) {
417 slotid
= find_last_bit(tbl
->used_slots
, tbl
->max_slots
);
418 if (slotid
< tbl
->max_slots
)
419 tbl
->highest_used_slotid
= slotid
;
421 tbl
->highest_used_slotid
= NFS4_NO_SLOT
;
423 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__
,
424 slotid
, tbl
->highest_used_slotid
);
427 bool nfs4_set_task_privileged(struct rpc_task
*task
, void *dummy
)
429 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
434 * Signal state manager thread if session fore channel is drained
436 static void nfs4_check_drain_fc_complete(struct nfs4_session
*ses
)
438 if (!test_bit(NFS4_SESSION_DRAINING
, &ses
->session_state
)) {
439 rpc_wake_up_first(&ses
->fc_slot_table
.slot_tbl_waitq
,
440 nfs4_set_task_privileged
, NULL
);
444 if (ses
->fc_slot_table
.highest_used_slotid
!= NFS4_NO_SLOT
)
447 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__
);
448 complete(&ses
->fc_slot_table
.complete
);
452 * Signal state manager thread if session back channel is drained
454 void nfs4_check_drain_bc_complete(struct nfs4_session
*ses
)
456 if (!test_bit(NFS4_SESSION_DRAINING
, &ses
->session_state
) ||
457 ses
->bc_slot_table
.highest_used_slotid
!= NFS4_NO_SLOT
)
459 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__
);
460 complete(&ses
->bc_slot_table
.complete
);
463 static void nfs41_sequence_free_slot(struct nfs4_sequence_res
*res
)
465 struct nfs4_slot_table
*tbl
;
467 tbl
= &res
->sr_session
->fc_slot_table
;
469 /* just wake up the next guy waiting since
470 * we may have not consumed a slot after all */
471 dprintk("%s: No slot\n", __func__
);
475 spin_lock(&tbl
->slot_tbl_lock
);
476 nfs4_free_slot(tbl
, res
->sr_slot
- tbl
->slots
);
477 nfs4_check_drain_fc_complete(res
->sr_session
);
478 spin_unlock(&tbl
->slot_tbl_lock
);
482 static int nfs41_sequence_done(struct rpc_task
*task
, struct nfs4_sequence_res
*res
)
484 unsigned long timestamp
;
485 struct nfs_client
*clp
;
488 * sr_status remains 1 if an RPC level error occurred. The server
489 * may or may not have processed the sequence operation..
490 * Proceed as if the server received and processed the sequence
493 if (res
->sr_status
== 1)
494 res
->sr_status
= NFS_OK
;
496 /* don't increment the sequence number if the task wasn't sent */
497 if (!RPC_WAS_SENT(task
))
500 /* Check the SEQUENCE operation status */
501 switch (res
->sr_status
) {
503 /* Update the slot's sequence and clientid lease timer */
504 ++res
->sr_slot
->seq_nr
;
505 timestamp
= res
->sr_renewal_time
;
506 clp
= res
->sr_session
->clp
;
507 do_renew_lease(clp
, timestamp
);
508 /* Check sequence flags */
509 if (res
->sr_status_flags
!= 0)
510 nfs4_schedule_lease_recovery(clp
);
513 /* The server detected a resend of the RPC call and
514 * returned NFS4ERR_DELAY as per Section 2.10.6.2
517 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
519 res
->sr_slot
- res
->sr_session
->fc_slot_table
.slots
,
520 res
->sr_slot
->seq_nr
);
523 /* Just update the slot sequence no. */
524 ++res
->sr_slot
->seq_nr
;
527 /* The session may be reset by one of the error handlers. */
528 dprintk("%s: Error %d free the slot \n", __func__
, res
->sr_status
);
529 nfs41_sequence_free_slot(res
);
532 if (!rpc_restart_call(task
))
534 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
538 static int nfs4_sequence_done(struct rpc_task
*task
,
539 struct nfs4_sequence_res
*res
)
541 if (res
->sr_session
== NULL
)
543 return nfs41_sequence_done(task
, res
);
547 * nfs4_find_slot - efficiently look for a free slot
549 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
550 * If found, we mark the slot as used, update the highest_used_slotid,
551 * and respectively set up the sequence operation args.
552 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
554 * Note: must be called with under the slot_tbl_lock.
557 nfs4_find_slot(struct nfs4_slot_table
*tbl
)
560 u32 ret_id
= NFS4_NO_SLOT
;
562 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
563 __func__
, tbl
->used_slots
[0], tbl
->highest_used_slotid
,
565 slotid
= find_first_zero_bit(tbl
->used_slots
, tbl
->max_slots
);
566 if (slotid
>= tbl
->max_slots
)
568 __set_bit(slotid
, tbl
->used_slots
);
569 if (slotid
> tbl
->highest_used_slotid
||
570 tbl
->highest_used_slotid
== NFS4_NO_SLOT
)
571 tbl
->highest_used_slotid
= slotid
;
574 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
575 __func__
, tbl
->used_slots
[0], tbl
->highest_used_slotid
, ret_id
);
579 static void nfs41_init_sequence(struct nfs4_sequence_args
*args
,
580 struct nfs4_sequence_res
*res
, int cache_reply
)
582 args
->sa_session
= NULL
;
583 args
->sa_cache_this
= 0;
585 args
->sa_cache_this
= 1;
586 res
->sr_session
= NULL
;
590 int nfs41_setup_sequence(struct nfs4_session
*session
,
591 struct nfs4_sequence_args
*args
,
592 struct nfs4_sequence_res
*res
,
593 struct rpc_task
*task
)
595 struct nfs4_slot
*slot
;
596 struct nfs4_slot_table
*tbl
;
599 dprintk("--> %s\n", __func__
);
600 /* slot already allocated? */
601 if (res
->sr_slot
!= NULL
)
604 tbl
= &session
->fc_slot_table
;
606 spin_lock(&tbl
->slot_tbl_lock
);
607 if (test_bit(NFS4_SESSION_DRAINING
, &session
->session_state
) &&
608 !rpc_task_has_priority(task
, RPC_PRIORITY_PRIVILEGED
)) {
609 /* The state manager will wait until the slot table is empty */
610 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
611 spin_unlock(&tbl
->slot_tbl_lock
);
612 dprintk("%s session is draining\n", __func__
);
616 if (!rpc_queue_empty(&tbl
->slot_tbl_waitq
) &&
617 !rpc_task_has_priority(task
, RPC_PRIORITY_PRIVILEGED
)) {
618 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
619 spin_unlock(&tbl
->slot_tbl_lock
);
620 dprintk("%s enforce FIFO order\n", __func__
);
624 slotid
= nfs4_find_slot(tbl
);
625 if (slotid
== NFS4_NO_SLOT
) {
626 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
627 spin_unlock(&tbl
->slot_tbl_lock
);
628 dprintk("<-- %s: no free slots\n", __func__
);
631 spin_unlock(&tbl
->slot_tbl_lock
);
633 rpc_task_set_priority(task
, RPC_PRIORITY_NORMAL
);
634 slot
= tbl
->slots
+ slotid
;
635 args
->sa_session
= session
;
636 args
->sa_slotid
= slotid
;
638 dprintk("<-- %s slotid=%d seqid=%d\n", __func__
, slotid
, slot
->seq_nr
);
640 res
->sr_session
= session
;
642 res
->sr_renewal_time
= jiffies
;
643 res
->sr_status_flags
= 0;
645 * sr_status is only set in decode_sequence, and so will remain
646 * set to 1 if an rpc level failure occurs.
651 EXPORT_SYMBOL_GPL(nfs41_setup_sequence
);
653 int nfs4_setup_sequence(const struct nfs_server
*server
,
654 struct nfs4_sequence_args
*args
,
655 struct nfs4_sequence_res
*res
,
656 struct rpc_task
*task
)
658 struct nfs4_session
*session
= nfs4_get_session(server
);
664 dprintk("--> %s clp %p session %p sr_slot %td\n",
665 __func__
, session
->clp
, session
, res
->sr_slot
?
666 res
->sr_slot
- session
->fc_slot_table
.slots
: -1);
668 ret
= nfs41_setup_sequence(session
, args
, res
, task
);
670 dprintk("<-- %s status=%d\n", __func__
, ret
);
674 struct nfs41_call_sync_data
{
675 const struct nfs_server
*seq_server
;
676 struct nfs4_sequence_args
*seq_args
;
677 struct nfs4_sequence_res
*seq_res
;
680 static void nfs41_call_sync_prepare(struct rpc_task
*task
, void *calldata
)
682 struct nfs41_call_sync_data
*data
= calldata
;
684 dprintk("--> %s data->seq_server %p\n", __func__
, data
->seq_server
);
686 if (nfs4_setup_sequence(data
->seq_server
, data
->seq_args
,
687 data
->seq_res
, task
))
689 rpc_call_start(task
);
692 static void nfs41_call_priv_sync_prepare(struct rpc_task
*task
, void *calldata
)
694 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
695 nfs41_call_sync_prepare(task
, calldata
);
698 static void nfs41_call_sync_done(struct rpc_task
*task
, void *calldata
)
700 struct nfs41_call_sync_data
*data
= calldata
;
702 nfs41_sequence_done(task
, data
->seq_res
);
705 static const struct rpc_call_ops nfs41_call_sync_ops
= {
706 .rpc_call_prepare
= nfs41_call_sync_prepare
,
707 .rpc_call_done
= nfs41_call_sync_done
,
710 static const struct rpc_call_ops nfs41_call_priv_sync_ops
= {
711 .rpc_call_prepare
= nfs41_call_priv_sync_prepare
,
712 .rpc_call_done
= nfs41_call_sync_done
,
715 static int nfs4_call_sync_sequence(struct rpc_clnt
*clnt
,
716 struct nfs_server
*server
,
717 struct rpc_message
*msg
,
718 struct nfs4_sequence_args
*args
,
719 struct nfs4_sequence_res
*res
,
723 struct rpc_task
*task
;
724 struct nfs41_call_sync_data data
= {
725 .seq_server
= server
,
729 struct rpc_task_setup task_setup
= {
732 .callback_ops
= &nfs41_call_sync_ops
,
733 .callback_data
= &data
737 task_setup
.callback_ops
= &nfs41_call_priv_sync_ops
;
738 task
= rpc_run_task(&task_setup
);
742 ret
= task
->tk_status
;
748 int _nfs4_call_sync_session(struct rpc_clnt
*clnt
,
749 struct nfs_server
*server
,
750 struct rpc_message
*msg
,
751 struct nfs4_sequence_args
*args
,
752 struct nfs4_sequence_res
*res
,
755 nfs41_init_sequence(args
, res
, cache_reply
);
756 return nfs4_call_sync_sequence(clnt
, server
, msg
, args
, res
, 0);
761 void nfs41_init_sequence(struct nfs4_sequence_args
*args
,
762 struct nfs4_sequence_res
*res
, int cache_reply
)
766 static int nfs4_sequence_done(struct rpc_task
*task
,
767 struct nfs4_sequence_res
*res
)
771 #endif /* CONFIG_NFS_V4_1 */
773 int _nfs4_call_sync(struct rpc_clnt
*clnt
,
774 struct nfs_server
*server
,
775 struct rpc_message
*msg
,
776 struct nfs4_sequence_args
*args
,
777 struct nfs4_sequence_res
*res
,
780 nfs41_init_sequence(args
, res
, cache_reply
);
781 return rpc_call_sync(clnt
, msg
, 0);
785 int nfs4_call_sync(struct rpc_clnt
*clnt
,
786 struct nfs_server
*server
,
787 struct rpc_message
*msg
,
788 struct nfs4_sequence_args
*args
,
789 struct nfs4_sequence_res
*res
,
792 return server
->nfs_client
->cl_mvops
->call_sync(clnt
, server
, msg
,
793 args
, res
, cache_reply
);
796 static void update_changeattr(struct inode
*dir
, struct nfs4_change_info
*cinfo
)
798 struct nfs_inode
*nfsi
= NFS_I(dir
);
800 spin_lock(&dir
->i_lock
);
801 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
802 if (!cinfo
->atomic
|| cinfo
->before
!= dir
->i_version
)
803 nfs_force_lookup_revalidate(dir
);
804 dir
->i_version
= cinfo
->after
;
805 spin_unlock(&dir
->i_lock
);
808 struct nfs4_opendata
{
810 struct nfs_openargs o_arg
;
811 struct nfs_openres o_res
;
812 struct nfs_open_confirmargs c_arg
;
813 struct nfs_open_confirmres c_res
;
814 struct nfs4_string owner_name
;
815 struct nfs4_string group_name
;
816 struct nfs_fattr f_attr
;
818 struct dentry
*dentry
;
819 struct nfs4_state_owner
*owner
;
820 struct nfs4_state
*state
;
822 unsigned long timestamp
;
823 unsigned int rpc_done
: 1;
829 static void nfs4_init_opendata_res(struct nfs4_opendata
*p
)
831 p
->o_res
.f_attr
= &p
->f_attr
;
832 p
->o_res
.seqid
= p
->o_arg
.seqid
;
833 p
->c_res
.seqid
= p
->c_arg
.seqid
;
834 p
->o_res
.server
= p
->o_arg
.server
;
835 nfs_fattr_init(&p
->f_attr
);
836 nfs_fattr_init_names(&p
->f_attr
, &p
->owner_name
, &p
->group_name
);
839 static struct nfs4_opendata
*nfs4_opendata_alloc(struct dentry
*dentry
,
840 struct nfs4_state_owner
*sp
, fmode_t fmode
, int flags
,
841 const struct iattr
*attrs
,
844 struct dentry
*parent
= dget_parent(dentry
);
845 struct inode
*dir
= parent
->d_inode
;
846 struct nfs_server
*server
= NFS_SERVER(dir
);
847 struct nfs4_opendata
*p
;
849 p
= kzalloc(sizeof(*p
), gfp_mask
);
852 p
->o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
, gfp_mask
);
853 if (p
->o_arg
.seqid
== NULL
)
855 nfs_sb_active(dentry
->d_sb
);
856 p
->dentry
= dget(dentry
);
859 atomic_inc(&sp
->so_count
);
860 p
->o_arg
.fh
= NFS_FH(dir
);
861 p
->o_arg
.open_flags
= flags
;
862 p
->o_arg
.fmode
= fmode
& (FMODE_READ
|FMODE_WRITE
);
863 p
->o_arg
.clientid
= server
->nfs_client
->cl_clientid
;
864 p
->o_arg
.id
.create_time
= ktime_to_ns(sp
->so_seqid
.create_time
);
865 p
->o_arg
.id
.uniquifier
= sp
->so_seqid
.owner_id
;
866 p
->o_arg
.name
= &dentry
->d_name
;
867 p
->o_arg
.server
= server
;
868 p
->o_arg
.bitmask
= server
->attr_bitmask
;
869 p
->o_arg
.open_bitmap
= &nfs4_fattr_bitmap
[0];
870 p
->o_arg
.claim
= NFS4_OPEN_CLAIM_NULL
;
871 if (attrs
!= NULL
&& attrs
->ia_valid
!= 0) {
874 p
->o_arg
.u
.attrs
= &p
->attrs
;
875 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
878 verf
[1] = current
->pid
;
879 memcpy(p
->o_arg
.u
.verifier
.data
, verf
,
880 sizeof(p
->o_arg
.u
.verifier
.data
));
882 p
->c_arg
.fh
= &p
->o_res
.fh
;
883 p
->c_arg
.stateid
= &p
->o_res
.stateid
;
884 p
->c_arg
.seqid
= p
->o_arg
.seqid
;
885 nfs4_init_opendata_res(p
);
895 static void nfs4_opendata_free(struct kref
*kref
)
897 struct nfs4_opendata
*p
= container_of(kref
,
898 struct nfs4_opendata
, kref
);
899 struct super_block
*sb
= p
->dentry
->d_sb
;
901 nfs_free_seqid(p
->o_arg
.seqid
);
902 if (p
->state
!= NULL
)
903 nfs4_put_open_state(p
->state
);
904 nfs4_put_state_owner(p
->owner
);
908 nfs_fattr_free_names(&p
->f_attr
);
912 static void nfs4_opendata_put(struct nfs4_opendata
*p
)
915 kref_put(&p
->kref
, nfs4_opendata_free
);
918 static int nfs4_wait_for_completion_rpc_task(struct rpc_task
*task
)
922 ret
= rpc_wait_for_completion_task(task
);
926 static int can_open_cached(struct nfs4_state
*state
, fmode_t mode
, int open_mode
)
930 if (open_mode
& (O_EXCL
|O_TRUNC
))
932 switch (mode
& (FMODE_READ
|FMODE_WRITE
)) {
934 ret
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0
935 && state
->n_rdonly
!= 0;
938 ret
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0
939 && state
->n_wronly
!= 0;
941 case FMODE_READ
|FMODE_WRITE
:
942 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0
943 && state
->n_rdwr
!= 0;
949 static int can_open_delegated(struct nfs_delegation
*delegation
, fmode_t fmode
)
951 if (delegation
== NULL
)
953 if ((delegation
->type
& fmode
) != fmode
)
955 if (test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
))
957 nfs_mark_delegation_referenced(delegation
);
961 static void update_open_stateflags(struct nfs4_state
*state
, fmode_t fmode
)
970 case FMODE_READ
|FMODE_WRITE
:
973 nfs4_state_set_mode_locked(state
, state
->state
| fmode
);
976 static void nfs_set_open_stateid_locked(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
978 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
979 nfs4_stateid_copy(&state
->stateid
, stateid
);
980 nfs4_stateid_copy(&state
->open_stateid
, stateid
);
983 set_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
986 set_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
988 case FMODE_READ
|FMODE_WRITE
:
989 set_bit(NFS_O_RDWR_STATE
, &state
->flags
);
993 static void nfs_set_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
995 write_seqlock(&state
->seqlock
);
996 nfs_set_open_stateid_locked(state
, stateid
, fmode
);
997 write_sequnlock(&state
->seqlock
);
1000 static void __update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, const nfs4_stateid
*deleg_stateid
, fmode_t fmode
)
1003 * Protect the call to nfs4_state_set_mode_locked and
1004 * serialise the stateid update
1006 write_seqlock(&state
->seqlock
);
1007 if (deleg_stateid
!= NULL
) {
1008 nfs4_stateid_copy(&state
->stateid
, deleg_stateid
);
1009 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
1011 if (open_stateid
!= NULL
)
1012 nfs_set_open_stateid_locked(state
, open_stateid
, fmode
);
1013 write_sequnlock(&state
->seqlock
);
1014 spin_lock(&state
->owner
->so_lock
);
1015 update_open_stateflags(state
, fmode
);
1016 spin_unlock(&state
->owner
->so_lock
);
1019 static int update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, nfs4_stateid
*delegation
, fmode_t fmode
)
1021 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
1022 struct nfs_delegation
*deleg_cur
;
1025 fmode
&= (FMODE_READ
|FMODE_WRITE
);
1028 deleg_cur
= rcu_dereference(nfsi
->delegation
);
1029 if (deleg_cur
== NULL
)
1032 spin_lock(&deleg_cur
->lock
);
1033 if (nfsi
->delegation
!= deleg_cur
||
1034 (deleg_cur
->type
& fmode
) != fmode
)
1035 goto no_delegation_unlock
;
1037 if (delegation
== NULL
)
1038 delegation
= &deleg_cur
->stateid
;
1039 else if (!nfs4_stateid_match(&deleg_cur
->stateid
, delegation
))
1040 goto no_delegation_unlock
;
1042 nfs_mark_delegation_referenced(deleg_cur
);
1043 __update_open_stateid(state
, open_stateid
, &deleg_cur
->stateid
, fmode
);
1045 no_delegation_unlock
:
1046 spin_unlock(&deleg_cur
->lock
);
1050 if (!ret
&& open_stateid
!= NULL
) {
1051 __update_open_stateid(state
, open_stateid
, NULL
, fmode
);
1059 static void nfs4_return_incompatible_delegation(struct inode
*inode
, fmode_t fmode
)
1061 struct nfs_delegation
*delegation
;
1064 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
1065 if (delegation
== NULL
|| (delegation
->type
& fmode
) == fmode
) {
1070 nfs4_inode_return_delegation(inode
);
1073 static struct nfs4_state
*nfs4_try_open_cached(struct nfs4_opendata
*opendata
)
1075 struct nfs4_state
*state
= opendata
->state
;
1076 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
1077 struct nfs_delegation
*delegation
;
1078 int open_mode
= opendata
->o_arg
.open_flags
& (O_EXCL
|O_TRUNC
);
1079 fmode_t fmode
= opendata
->o_arg
.fmode
;
1080 nfs4_stateid stateid
;
1084 if (can_open_cached(state
, fmode
, open_mode
)) {
1085 spin_lock(&state
->owner
->so_lock
);
1086 if (can_open_cached(state
, fmode
, open_mode
)) {
1087 update_open_stateflags(state
, fmode
);
1088 spin_unlock(&state
->owner
->so_lock
);
1089 goto out_return_state
;
1091 spin_unlock(&state
->owner
->so_lock
);
1094 delegation
= rcu_dereference(nfsi
->delegation
);
1095 if (!can_open_delegated(delegation
, fmode
)) {
1099 /* Save the delegation */
1100 nfs4_stateid_copy(&stateid
, &delegation
->stateid
);
1102 ret
= nfs_may_open(state
->inode
, state
->owner
->so_cred
, open_mode
);
1107 /* Try to update the stateid using the delegation */
1108 if (update_open_stateid(state
, NULL
, &stateid
, fmode
))
1109 goto out_return_state
;
1112 return ERR_PTR(ret
);
1114 atomic_inc(&state
->count
);
1118 static struct nfs4_state
*nfs4_opendata_to_nfs4_state(struct nfs4_opendata
*data
)
1120 struct inode
*inode
;
1121 struct nfs4_state
*state
= NULL
;
1122 struct nfs_delegation
*delegation
;
1125 if (!data
->rpc_done
) {
1126 state
= nfs4_try_open_cached(data
);
1131 if (!(data
->f_attr
.valid
& NFS_ATTR_FATTR
))
1133 inode
= nfs_fhget(data
->dir
->d_sb
, &data
->o_res
.fh
, &data
->f_attr
);
1134 ret
= PTR_ERR(inode
);
1138 state
= nfs4_get_open_state(inode
, data
->owner
);
1141 if (data
->o_res
.delegation_type
!= 0) {
1142 struct nfs_client
*clp
= NFS_SERVER(inode
)->nfs_client
;
1143 int delegation_flags
= 0;
1146 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
1148 delegation_flags
= delegation
->flags
;
1150 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_DELEGATE_CUR
) {
1151 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1152 "returning a delegation for "
1153 "OPEN(CLAIM_DELEGATE_CUR)\n",
1155 } else if ((delegation_flags
& 1UL<<NFS_DELEGATION_NEED_RECLAIM
) == 0)
1156 nfs_inode_set_delegation(state
->inode
,
1157 data
->owner
->so_cred
,
1160 nfs_inode_reclaim_delegation(state
->inode
,
1161 data
->owner
->so_cred
,
1165 update_open_stateid(state
, &data
->o_res
.stateid
, NULL
,
1173 return ERR_PTR(ret
);
1176 static struct nfs_open_context
*nfs4_state_find_open_context(struct nfs4_state
*state
)
1178 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
1179 struct nfs_open_context
*ctx
;
1181 spin_lock(&state
->inode
->i_lock
);
1182 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
1183 if (ctx
->state
!= state
)
1185 get_nfs_open_context(ctx
);
1186 spin_unlock(&state
->inode
->i_lock
);
1189 spin_unlock(&state
->inode
->i_lock
);
1190 return ERR_PTR(-ENOENT
);
1193 static struct nfs4_opendata
*nfs4_open_recoverdata_alloc(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1195 struct nfs4_opendata
*opendata
;
1197 opendata
= nfs4_opendata_alloc(ctx
->dentry
, state
->owner
, 0, 0, NULL
, GFP_NOFS
);
1198 if (opendata
== NULL
)
1199 return ERR_PTR(-ENOMEM
);
1200 opendata
->state
= state
;
1201 atomic_inc(&state
->count
);
1205 static int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, fmode_t fmode
, struct nfs4_state
**res
)
1207 struct nfs4_state
*newstate
;
1210 opendata
->o_arg
.open_flags
= 0;
1211 opendata
->o_arg
.fmode
= fmode
;
1212 memset(&opendata
->o_res
, 0, sizeof(opendata
->o_res
));
1213 memset(&opendata
->c_res
, 0, sizeof(opendata
->c_res
));
1214 nfs4_init_opendata_res(opendata
);
1215 ret
= _nfs4_recover_proc_open(opendata
);
1218 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
1219 if (IS_ERR(newstate
))
1220 return PTR_ERR(newstate
);
1221 nfs4_close_state(newstate
, fmode
);
1226 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
1228 struct nfs4_state
*newstate
;
1231 /* memory barrier prior to reading state->n_* */
1232 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
1234 if (state
->n_rdwr
!= 0) {
1235 clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1236 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &newstate
);
1239 if (newstate
!= state
)
1242 if (state
->n_wronly
!= 0) {
1243 clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1244 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &newstate
);
1247 if (newstate
!= state
)
1250 if (state
->n_rdonly
!= 0) {
1251 clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1252 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &newstate
);
1255 if (newstate
!= state
)
1259 * We may have performed cached opens for all three recoveries.
1260 * Check if we need to update the current stateid.
1262 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0 &&
1263 !nfs4_stateid_match(&state
->stateid
, &state
->open_stateid
)) {
1264 write_seqlock(&state
->seqlock
);
1265 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
1266 nfs4_stateid_copy(&state
->stateid
, &state
->open_stateid
);
1267 write_sequnlock(&state
->seqlock
);
1274 * reclaim state on the server after a reboot.
1276 static int _nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1278 struct nfs_delegation
*delegation
;
1279 struct nfs4_opendata
*opendata
;
1280 fmode_t delegation_type
= 0;
1283 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1284 if (IS_ERR(opendata
))
1285 return PTR_ERR(opendata
);
1286 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
1287 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
1289 delegation
= rcu_dereference(NFS_I(state
->inode
)->delegation
);
1290 if (delegation
!= NULL
&& test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) != 0)
1291 delegation_type
= delegation
->type
;
1293 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
1294 status
= nfs4_open_recover(opendata
, state
);
1295 nfs4_opendata_put(opendata
);
1299 static int nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1301 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1302 struct nfs4_exception exception
= { };
1305 err
= _nfs4_do_open_reclaim(ctx
, state
);
1306 if (err
!= -NFS4ERR_DELAY
)
1308 nfs4_handle_exception(server
, err
, &exception
);
1309 } while (exception
.retry
);
1313 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1315 struct nfs_open_context
*ctx
;
1318 ctx
= nfs4_state_find_open_context(state
);
1320 return PTR_ERR(ctx
);
1321 ret
= nfs4_do_open_reclaim(ctx
, state
);
1322 put_nfs_open_context(ctx
);
1326 static int _nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
1328 struct nfs4_opendata
*opendata
;
1331 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1332 if (IS_ERR(opendata
))
1333 return PTR_ERR(opendata
);
1334 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
1335 nfs4_stateid_copy(&opendata
->o_arg
.u
.delegation
, stateid
);
1336 ret
= nfs4_open_recover(opendata
, state
);
1337 nfs4_opendata_put(opendata
);
1341 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
1343 struct nfs4_exception exception
= { };
1344 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1347 err
= _nfs4_open_delegation_recall(ctx
, state
, stateid
);
1353 case -NFS4ERR_BADSESSION
:
1354 case -NFS4ERR_BADSLOT
:
1355 case -NFS4ERR_BAD_HIGH_SLOT
:
1356 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1357 case -NFS4ERR_DEADSESSION
:
1358 nfs4_schedule_session_recovery(server
->nfs_client
->cl_session
, err
);
1360 case -NFS4ERR_STALE_CLIENTID
:
1361 case -NFS4ERR_STALE_STATEID
:
1362 case -NFS4ERR_EXPIRED
:
1363 /* Don't recall a delegation if it was lost */
1364 nfs4_schedule_lease_recovery(server
->nfs_client
);
1368 * The show must go on: exit, but mark the
1369 * stateid as needing recovery.
1371 case -NFS4ERR_DELEG_REVOKED
:
1372 case -NFS4ERR_ADMIN_REVOKED
:
1373 case -NFS4ERR_BAD_STATEID
:
1374 nfs_inode_find_state_and_recover(state
->inode
,
1376 nfs4_schedule_stateid_recovery(server
, state
);
1379 * User RPCSEC_GSS context has expired.
1380 * We cannot recover this stateid now, so
1381 * skip it and allow recovery thread to
1388 err
= nfs4_handle_exception(server
, err
, &exception
);
1389 } while (exception
.retry
);
1394 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
1396 struct nfs4_opendata
*data
= calldata
;
1398 data
->rpc_status
= task
->tk_status
;
1399 if (data
->rpc_status
== 0) {
1400 nfs4_stateid_copy(&data
->o_res
.stateid
, &data
->c_res
.stateid
);
1401 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
1402 renew_lease(data
->o_res
.server
, data
->timestamp
);
1407 static void nfs4_open_confirm_release(void *calldata
)
1409 struct nfs4_opendata
*data
= calldata
;
1410 struct nfs4_state
*state
= NULL
;
1412 /* If this request hasn't been cancelled, do nothing */
1413 if (data
->cancelled
== 0)
1415 /* In case of error, no cleanup! */
1416 if (!data
->rpc_done
)
1418 state
= nfs4_opendata_to_nfs4_state(data
);
1420 nfs4_close_state(state
, data
->o_arg
.fmode
);
1422 nfs4_opendata_put(data
);
1425 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
1426 .rpc_call_done
= nfs4_open_confirm_done
,
1427 .rpc_release
= nfs4_open_confirm_release
,
1431 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1433 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
1435 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
1436 struct rpc_task
*task
;
1437 struct rpc_message msg
= {
1438 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
1439 .rpc_argp
= &data
->c_arg
,
1440 .rpc_resp
= &data
->c_res
,
1441 .rpc_cred
= data
->owner
->so_cred
,
1443 struct rpc_task_setup task_setup_data
= {
1444 .rpc_client
= server
->client
,
1445 .rpc_message
= &msg
,
1446 .callback_ops
= &nfs4_open_confirm_ops
,
1447 .callback_data
= data
,
1448 .workqueue
= nfsiod_workqueue
,
1449 .flags
= RPC_TASK_ASYNC
,
1453 kref_get(&data
->kref
);
1455 data
->rpc_status
= 0;
1456 data
->timestamp
= jiffies
;
1457 task
= rpc_run_task(&task_setup_data
);
1459 return PTR_ERR(task
);
1460 status
= nfs4_wait_for_completion_rpc_task(task
);
1462 data
->cancelled
= 1;
1465 status
= data
->rpc_status
;
1470 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
1472 struct nfs4_opendata
*data
= calldata
;
1473 struct nfs4_state_owner
*sp
= data
->owner
;
1475 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
1478 * Check if we still need to send an OPEN call, or if we can use
1479 * a delegation instead.
1481 if (data
->state
!= NULL
) {
1482 struct nfs_delegation
*delegation
;
1484 if (can_open_cached(data
->state
, data
->o_arg
.fmode
, data
->o_arg
.open_flags
))
1487 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
1488 if (data
->o_arg
.claim
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
&&
1489 can_open_delegated(delegation
, data
->o_arg
.fmode
))
1490 goto unlock_no_action
;
1493 /* Update client id. */
1494 data
->o_arg
.clientid
= sp
->so_server
->nfs_client
->cl_clientid
;
1495 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
) {
1496 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
1497 nfs_copy_fh(&data
->o_res
.fh
, data
->o_arg
.fh
);
1499 data
->timestamp
= jiffies
;
1500 if (nfs4_setup_sequence(data
->o_arg
.server
,
1501 &data
->o_arg
.seq_args
,
1502 &data
->o_res
.seq_res
, task
))
1504 rpc_call_start(task
);
1509 task
->tk_action
= NULL
;
1513 static void nfs4_recover_open_prepare(struct rpc_task
*task
, void *calldata
)
1515 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
1516 nfs4_open_prepare(task
, calldata
);
1519 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
1521 struct nfs4_opendata
*data
= calldata
;
1523 data
->rpc_status
= task
->tk_status
;
1525 if (!nfs4_sequence_done(task
, &data
->o_res
.seq_res
))
1528 if (task
->tk_status
== 0) {
1529 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
1533 data
->rpc_status
= -ELOOP
;
1536 data
->rpc_status
= -EISDIR
;
1539 data
->rpc_status
= -ENOTDIR
;
1541 renew_lease(data
->o_res
.server
, data
->timestamp
);
1542 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
1543 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
1548 static void nfs4_open_release(void *calldata
)
1550 struct nfs4_opendata
*data
= calldata
;
1551 struct nfs4_state
*state
= NULL
;
1553 /* If this request hasn't been cancelled, do nothing */
1554 if (data
->cancelled
== 0)
1556 /* In case of error, no cleanup! */
1557 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
1559 /* In case we need an open_confirm, no cleanup! */
1560 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
1562 state
= nfs4_opendata_to_nfs4_state(data
);
1564 nfs4_close_state(state
, data
->o_arg
.fmode
);
1566 nfs4_opendata_put(data
);
1569 static const struct rpc_call_ops nfs4_open_ops
= {
1570 .rpc_call_prepare
= nfs4_open_prepare
,
1571 .rpc_call_done
= nfs4_open_done
,
1572 .rpc_release
= nfs4_open_release
,
1575 static const struct rpc_call_ops nfs4_recover_open_ops
= {
1576 .rpc_call_prepare
= nfs4_recover_open_prepare
,
1577 .rpc_call_done
= nfs4_open_done
,
1578 .rpc_release
= nfs4_open_release
,
1581 static int nfs4_run_open_task(struct nfs4_opendata
*data
, int isrecover
)
1583 struct inode
*dir
= data
->dir
->d_inode
;
1584 struct nfs_server
*server
= NFS_SERVER(dir
);
1585 struct nfs_openargs
*o_arg
= &data
->o_arg
;
1586 struct nfs_openres
*o_res
= &data
->o_res
;
1587 struct rpc_task
*task
;
1588 struct rpc_message msg
= {
1589 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
1592 .rpc_cred
= data
->owner
->so_cred
,
1594 struct rpc_task_setup task_setup_data
= {
1595 .rpc_client
= server
->client
,
1596 .rpc_message
= &msg
,
1597 .callback_ops
= &nfs4_open_ops
,
1598 .callback_data
= data
,
1599 .workqueue
= nfsiod_workqueue
,
1600 .flags
= RPC_TASK_ASYNC
,
1604 nfs41_init_sequence(&o_arg
->seq_args
, &o_res
->seq_res
, 1);
1605 kref_get(&data
->kref
);
1607 data
->rpc_status
= 0;
1608 data
->cancelled
= 0;
1610 task_setup_data
.callback_ops
= &nfs4_recover_open_ops
;
1611 task
= rpc_run_task(&task_setup_data
);
1613 return PTR_ERR(task
);
1614 status
= nfs4_wait_for_completion_rpc_task(task
);
1616 data
->cancelled
= 1;
1619 status
= data
->rpc_status
;
1625 static int _nfs4_recover_proc_open(struct nfs4_opendata
*data
)
1627 struct inode
*dir
= data
->dir
->d_inode
;
1628 struct nfs_openres
*o_res
= &data
->o_res
;
1631 status
= nfs4_run_open_task(data
, 1);
1632 if (status
!= 0 || !data
->rpc_done
)
1635 nfs_fattr_map_and_free_names(NFS_SERVER(dir
), &data
->f_attr
);
1637 if (o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1638 status
= _nfs4_proc_open_confirm(data
);
1647 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1649 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
1651 struct inode
*dir
= data
->dir
->d_inode
;
1652 struct nfs_server
*server
= NFS_SERVER(dir
);
1653 struct nfs_openargs
*o_arg
= &data
->o_arg
;
1654 struct nfs_openres
*o_res
= &data
->o_res
;
1657 status
= nfs4_run_open_task(data
, 0);
1658 if (!data
->rpc_done
)
1661 if (status
== -NFS4ERR_BADNAME
&&
1662 !(o_arg
->open_flags
& O_CREAT
))
1667 nfs_fattr_map_and_free_names(server
, &data
->f_attr
);
1669 if (o_arg
->open_flags
& O_CREAT
)
1670 update_changeattr(dir
, &o_res
->cinfo
);
1671 if ((o_res
->rflags
& NFS4_OPEN_RESULT_LOCKTYPE_POSIX
) == 0)
1672 server
->caps
&= ~NFS_CAP_POSIX_LOCK
;
1673 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1674 status
= _nfs4_proc_open_confirm(data
);
1678 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
1679 _nfs4_proc_getattr(server
, &o_res
->fh
, o_res
->f_attr
);
1683 static int nfs4_client_recover_expired_lease(struct nfs_client
*clp
)
1688 for (loop
= NFS4_MAX_LOOP_ON_RECOVER
; loop
!= 0; loop
--) {
1689 ret
= nfs4_wait_clnt_recover(clp
);
1692 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
1693 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
1695 nfs4_schedule_state_manager(clp
);
1701 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
1703 return nfs4_client_recover_expired_lease(server
->nfs_client
);
1708 * reclaim state on the server after a network partition.
1709 * Assumes caller holds the appropriate lock
1711 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1713 struct nfs4_opendata
*opendata
;
1716 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1717 if (IS_ERR(opendata
))
1718 return PTR_ERR(opendata
);
1719 ret
= nfs4_open_recover(opendata
, state
);
1721 d_drop(ctx
->dentry
);
1722 nfs4_opendata_put(opendata
);
1726 static int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1728 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1729 struct nfs4_exception exception
= { };
1733 err
= _nfs4_open_expired(ctx
, state
);
1737 case -NFS4ERR_GRACE
:
1738 case -NFS4ERR_DELAY
:
1739 nfs4_handle_exception(server
, err
, &exception
);
1742 } while (exception
.retry
);
1747 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1749 struct nfs_open_context
*ctx
;
1752 ctx
= nfs4_state_find_open_context(state
);
1754 return PTR_ERR(ctx
);
1755 ret
= nfs4_do_open_expired(ctx
, state
);
1756 put_nfs_open_context(ctx
);
1760 #if defined(CONFIG_NFS_V4_1)
1761 static void nfs41_clear_delegation_stateid(struct nfs4_state
*state
)
1763 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1764 nfs4_stateid
*stateid
= &state
->stateid
;
1767 /* If a state reset has been done, test_stateid is unneeded */
1768 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
1771 status
= nfs41_test_stateid(server
, stateid
);
1772 if (status
!= NFS_OK
) {
1773 /* Free the stateid unless the server explicitly
1774 * informs us the stateid is unrecognized. */
1775 if (status
!= -NFS4ERR_BAD_STATEID
)
1776 nfs41_free_stateid(server
, stateid
);
1778 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
1783 * nfs41_check_open_stateid - possibly free an open stateid
1785 * @state: NFSv4 state for an inode
1787 * Returns NFS_OK if recovery for this stateid is now finished.
1788 * Otherwise a negative NFS4ERR value is returned.
1790 static int nfs41_check_open_stateid(struct nfs4_state
*state
)
1792 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1793 nfs4_stateid
*stateid
= &state
->stateid
;
1796 /* If a state reset has been done, test_stateid is unneeded */
1797 if ((test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) == 0) &&
1798 (test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) == 0) &&
1799 (test_bit(NFS_O_RDWR_STATE
, &state
->flags
) == 0))
1800 return -NFS4ERR_BAD_STATEID
;
1802 status
= nfs41_test_stateid(server
, stateid
);
1803 if (status
!= NFS_OK
) {
1804 /* Free the stateid unless the server explicitly
1805 * informs us the stateid is unrecognized. */
1806 if (status
!= -NFS4ERR_BAD_STATEID
)
1807 nfs41_free_stateid(server
, stateid
);
1809 clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1810 clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1811 clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1816 static int nfs41_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1820 nfs41_clear_delegation_stateid(state
);
1821 status
= nfs41_check_open_stateid(state
);
1822 if (status
!= NFS_OK
)
1823 status
= nfs4_open_expired(sp
, state
);
1829 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1830 * fields corresponding to attributes that were used to store the verifier.
1831 * Make sure we clobber those fields in the later setattr call
1833 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1835 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1836 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1837 sattr
->ia_valid
|= ATTR_ATIME
;
1839 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1840 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1841 sattr
->ia_valid
|= ATTR_MTIME
;
1845 * Returns a referenced nfs4_state
1847 static int _nfs4_do_open(struct inode
*dir
,
1848 struct dentry
*dentry
,
1851 struct iattr
*sattr
,
1852 struct rpc_cred
*cred
,
1853 struct nfs4_state
**res
,
1854 struct nfs4_threshold
**ctx_th
)
1856 struct nfs4_state_owner
*sp
;
1857 struct nfs4_state
*state
= NULL
;
1858 struct nfs_server
*server
= NFS_SERVER(dir
);
1859 struct nfs4_opendata
*opendata
;
1862 /* Protect against reboot recovery conflicts */
1864 sp
= nfs4_get_state_owner(server
, cred
, GFP_KERNEL
);
1866 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1869 status
= nfs4_recover_expired_lease(server
);
1871 goto err_put_state_owner
;
1872 if (dentry
->d_inode
!= NULL
)
1873 nfs4_return_incompatible_delegation(dentry
->d_inode
, fmode
);
1875 opendata
= nfs4_opendata_alloc(dentry
, sp
, fmode
, flags
, sattr
, GFP_KERNEL
);
1876 if (opendata
== NULL
)
1877 goto err_put_state_owner
;
1879 if (ctx_th
&& server
->attr_bitmask
[2] & FATTR4_WORD2_MDSTHRESHOLD
) {
1880 opendata
->f_attr
.mdsthreshold
= pnfs_mdsthreshold_alloc();
1881 if (!opendata
->f_attr
.mdsthreshold
)
1882 goto err_opendata_put
;
1883 opendata
->o_arg
.open_bitmap
= &nfs4_pnfs_open_bitmap
[0];
1885 if (dentry
->d_inode
!= NULL
)
1886 opendata
->state
= nfs4_get_open_state(dentry
->d_inode
, sp
);
1888 status
= _nfs4_proc_open(opendata
);
1890 goto err_opendata_put
;
1892 state
= nfs4_opendata_to_nfs4_state(opendata
);
1893 status
= PTR_ERR(state
);
1895 goto err_opendata_put
;
1896 if (server
->caps
& NFS_CAP_POSIX_LOCK
)
1897 set_bit(NFS_STATE_POSIX_LOCKS
, &state
->flags
);
1899 if (opendata
->o_arg
.open_flags
& O_EXCL
) {
1900 nfs4_exclusive_attrset(opendata
, sattr
);
1902 nfs_fattr_init(opendata
->o_res
.f_attr
);
1903 status
= nfs4_do_setattr(state
->inode
, cred
,
1904 opendata
->o_res
.f_attr
, sattr
,
1907 nfs_setattr_update_inode(state
->inode
, sattr
);
1908 nfs_post_op_update_inode(state
->inode
, opendata
->o_res
.f_attr
);
1911 if (pnfs_use_threshold(ctx_th
, opendata
->f_attr
.mdsthreshold
, server
))
1912 *ctx_th
= opendata
->f_attr
.mdsthreshold
;
1914 kfree(opendata
->f_attr
.mdsthreshold
);
1915 opendata
->f_attr
.mdsthreshold
= NULL
;
1917 nfs4_opendata_put(opendata
);
1918 nfs4_put_state_owner(sp
);
1922 kfree(opendata
->f_attr
.mdsthreshold
);
1923 nfs4_opendata_put(opendata
);
1924 err_put_state_owner
:
1925 nfs4_put_state_owner(sp
);
1932 static struct nfs4_state
*nfs4_do_open(struct inode
*dir
,
1933 struct dentry
*dentry
,
1936 struct iattr
*sattr
,
1937 struct rpc_cred
*cred
,
1938 struct nfs4_threshold
**ctx_th
)
1940 struct nfs4_exception exception
= { };
1941 struct nfs4_state
*res
;
1944 fmode
&= FMODE_READ
|FMODE_WRITE
;
1946 status
= _nfs4_do_open(dir
, dentry
, fmode
, flags
, sattr
, cred
,
1950 /* NOTE: BAD_SEQID means the server and client disagree about the
1951 * book-keeping w.r.t. state-changing operations
1952 * (OPEN/CLOSE/LOCK/LOCKU...)
1953 * It is actually a sign of a bug on the client or on the server.
1955 * If we receive a BAD_SEQID error in the particular case of
1956 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1957 * have unhashed the old state_owner for us, and that we can
1958 * therefore safely retry using a new one. We should still warn
1959 * the user though...
1961 if (status
== -NFS4ERR_BAD_SEQID
) {
1962 pr_warn_ratelimited("NFS: v4 server %s "
1963 " returned a bad sequence-id error!\n",
1964 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1965 exception
.retry
= 1;
1969 * BAD_STATEID on OPEN means that the server cancelled our
1970 * state before it received the OPEN_CONFIRM.
1971 * Recover by retrying the request as per the discussion
1972 * on Page 181 of RFC3530.
1974 if (status
== -NFS4ERR_BAD_STATEID
) {
1975 exception
.retry
= 1;
1978 if (status
== -EAGAIN
) {
1979 /* We must have found a delegation */
1980 exception
.retry
= 1;
1983 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1984 status
, &exception
));
1985 } while (exception
.retry
);
1989 static int _nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1990 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1991 struct nfs4_state
*state
)
1993 struct nfs_server
*server
= NFS_SERVER(inode
);
1994 struct nfs_setattrargs arg
= {
1995 .fh
= NFS_FH(inode
),
1998 .bitmask
= server
->attr_bitmask
,
2000 struct nfs_setattrres res
= {
2004 struct rpc_message msg
= {
2005 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
2010 unsigned long timestamp
= jiffies
;
2013 nfs_fattr_init(fattr
);
2015 if (state
!= NULL
) {
2016 nfs4_select_rw_stateid(&arg
.stateid
, state
, FMODE_WRITE
,
2017 current
->files
, current
->tgid
);
2018 } else if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
,
2020 /* Use that stateid */
2022 nfs4_stateid_copy(&arg
.stateid
, &zero_stateid
);
2024 status
= nfs4_call_sync(server
->client
, server
, &msg
, &arg
.seq_args
, &res
.seq_res
, 1);
2025 if (status
== 0 && state
!= NULL
)
2026 renew_lease(server
, timestamp
);
2030 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
2031 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
2032 struct nfs4_state
*state
)
2034 struct nfs_server
*server
= NFS_SERVER(inode
);
2035 struct nfs4_exception exception
= {
2041 err
= _nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
);
2043 case -NFS4ERR_OPENMODE
:
2044 if (state
&& !(state
->state
& FMODE_WRITE
)) {
2046 if (sattr
->ia_valid
& ATTR_OPEN
)
2051 err
= nfs4_handle_exception(server
, err
, &exception
);
2052 } while (exception
.retry
);
2057 struct nfs4_closedata
{
2058 struct inode
*inode
;
2059 struct nfs4_state
*state
;
2060 struct nfs_closeargs arg
;
2061 struct nfs_closeres res
;
2062 struct nfs_fattr fattr
;
2063 unsigned long timestamp
;
2068 static void nfs4_free_closedata(void *data
)
2070 struct nfs4_closedata
*calldata
= data
;
2071 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
2072 struct super_block
*sb
= calldata
->state
->inode
->i_sb
;
2075 pnfs_roc_release(calldata
->state
->inode
);
2076 nfs4_put_open_state(calldata
->state
);
2077 nfs_free_seqid(calldata
->arg
.seqid
);
2078 nfs4_put_state_owner(sp
);
2079 nfs_sb_deactive(sb
);
2083 static void nfs4_close_clear_stateid_flags(struct nfs4_state
*state
,
2086 spin_lock(&state
->owner
->so_lock
);
2087 if (!(fmode
& FMODE_READ
))
2088 clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
2089 if (!(fmode
& FMODE_WRITE
))
2090 clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
2091 clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
2092 spin_unlock(&state
->owner
->so_lock
);
2095 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
2097 struct nfs4_closedata
*calldata
= data
;
2098 struct nfs4_state
*state
= calldata
->state
;
2099 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
2101 dprintk("%s: begin!\n", __func__
);
2102 if (!nfs4_sequence_done(task
, &calldata
->res
.seq_res
))
2104 /* hmm. we are done with the inode, and in the process of freeing
2105 * the state_owner. we keep this around to process errors
2107 switch (task
->tk_status
) {
2110 pnfs_roc_set_barrier(state
->inode
,
2111 calldata
->roc_barrier
);
2112 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, 0);
2113 renew_lease(server
, calldata
->timestamp
);
2114 nfs4_close_clear_stateid_flags(state
,
2115 calldata
->arg
.fmode
);
2117 case -NFS4ERR_STALE_STATEID
:
2118 case -NFS4ERR_OLD_STATEID
:
2119 case -NFS4ERR_BAD_STATEID
:
2120 case -NFS4ERR_EXPIRED
:
2121 if (calldata
->arg
.fmode
== 0)
2124 if (nfs4_async_handle_error(task
, server
, state
) == -EAGAIN
)
2125 rpc_restart_call_prepare(task
);
2127 nfs_release_seqid(calldata
->arg
.seqid
);
2128 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
2129 dprintk("%s: done, ret = %d!\n", __func__
, task
->tk_status
);
2132 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
2134 struct nfs4_closedata
*calldata
= data
;
2135 struct nfs4_state
*state
= calldata
->state
;
2138 dprintk("%s: begin!\n", __func__
);
2139 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
2142 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
2143 calldata
->arg
.fmode
= FMODE_READ
|FMODE_WRITE
;
2144 spin_lock(&state
->owner
->so_lock
);
2145 /* Calculate the change in open mode */
2146 if (state
->n_rdwr
== 0) {
2147 if (state
->n_rdonly
== 0) {
2148 call_close
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
2149 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
2150 calldata
->arg
.fmode
&= ~FMODE_READ
;
2152 if (state
->n_wronly
== 0) {
2153 call_close
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
2154 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
2155 calldata
->arg
.fmode
&= ~FMODE_WRITE
;
2158 spin_unlock(&state
->owner
->so_lock
);
2161 /* Note: exit _without_ calling nfs4_close_done */
2162 task
->tk_action
= NULL
;
2166 if (calldata
->arg
.fmode
== 0) {
2167 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
];
2168 if (calldata
->roc
&&
2169 pnfs_roc_drain(calldata
->inode
, &calldata
->roc_barrier
)) {
2170 rpc_sleep_on(&NFS_SERVER(calldata
->inode
)->roc_rpcwaitq
,
2176 nfs_fattr_init(calldata
->res
.fattr
);
2177 calldata
->timestamp
= jiffies
;
2178 if (nfs4_setup_sequence(NFS_SERVER(calldata
->inode
),
2179 &calldata
->arg
.seq_args
,
2180 &calldata
->res
.seq_res
,
2183 rpc_call_start(task
);
2185 dprintk("%s: done!\n", __func__
);
2188 static const struct rpc_call_ops nfs4_close_ops
= {
2189 .rpc_call_prepare
= nfs4_close_prepare
,
2190 .rpc_call_done
= nfs4_close_done
,
2191 .rpc_release
= nfs4_free_closedata
,
2195 * It is possible for data to be read/written from a mem-mapped file
2196 * after the sys_close call (which hits the vfs layer as a flush).
2197 * This means that we can't safely call nfsv4 close on a file until
2198 * the inode is cleared. This in turn means that we are not good
2199 * NFSv4 citizens - we do not indicate to the server to update the file's
2200 * share state even when we are done with one of the three share
2201 * stateid's in the inode.
2203 * NOTE: Caller must be holding the sp->so_owner semaphore!
2205 int nfs4_do_close(struct nfs4_state
*state
, gfp_t gfp_mask
, int wait
, bool roc
)
2207 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
2208 struct nfs4_closedata
*calldata
;
2209 struct nfs4_state_owner
*sp
= state
->owner
;
2210 struct rpc_task
*task
;
2211 struct rpc_message msg
= {
2212 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
2213 .rpc_cred
= state
->owner
->so_cred
,
2215 struct rpc_task_setup task_setup_data
= {
2216 .rpc_client
= server
->client
,
2217 .rpc_message
= &msg
,
2218 .callback_ops
= &nfs4_close_ops
,
2219 .workqueue
= nfsiod_workqueue
,
2220 .flags
= RPC_TASK_ASYNC
,
2222 int status
= -ENOMEM
;
2224 calldata
= kzalloc(sizeof(*calldata
), gfp_mask
);
2225 if (calldata
== NULL
)
2227 nfs41_init_sequence(&calldata
->arg
.seq_args
, &calldata
->res
.seq_res
, 1);
2228 calldata
->inode
= state
->inode
;
2229 calldata
->state
= state
;
2230 calldata
->arg
.fh
= NFS_FH(state
->inode
);
2231 calldata
->arg
.stateid
= &state
->open_stateid
;
2232 /* Serialization for the sequence id */
2233 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
, gfp_mask
);
2234 if (calldata
->arg
.seqid
== NULL
)
2235 goto out_free_calldata
;
2236 calldata
->arg
.fmode
= 0;
2237 calldata
->arg
.bitmask
= server
->cache_consistency_bitmask
;
2238 calldata
->res
.fattr
= &calldata
->fattr
;
2239 calldata
->res
.seqid
= calldata
->arg
.seqid
;
2240 calldata
->res
.server
= server
;
2241 calldata
->roc
= roc
;
2242 nfs_sb_active(calldata
->inode
->i_sb
);
2244 msg
.rpc_argp
= &calldata
->arg
;
2245 msg
.rpc_resp
= &calldata
->res
;
2246 task_setup_data
.callback_data
= calldata
;
2247 task
= rpc_run_task(&task_setup_data
);
2249 return PTR_ERR(task
);
2252 status
= rpc_wait_for_completion_task(task
);
2259 pnfs_roc_release(state
->inode
);
2260 nfs4_put_open_state(state
);
2261 nfs4_put_state_owner(sp
);
2265 static struct inode
*
2266 nfs4_atomic_open(struct inode
*dir
, struct nfs_open_context
*ctx
, int open_flags
, struct iattr
*attr
)
2268 struct nfs4_state
*state
;
2270 /* Protect against concurrent sillydeletes */
2271 state
= nfs4_do_open(dir
, ctx
->dentry
, ctx
->mode
, open_flags
, attr
,
2272 ctx
->cred
, &ctx
->mdsthreshold
);
2274 return ERR_CAST(state
);
2276 return igrab(state
->inode
);
2279 static void nfs4_close_context(struct nfs_open_context
*ctx
, int is_sync
)
2281 if (ctx
->state
== NULL
)
2284 nfs4_close_sync(ctx
->state
, ctx
->mode
);
2286 nfs4_close_state(ctx
->state
, ctx
->mode
);
2289 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
2291 struct nfs4_server_caps_arg args
= {
2294 struct nfs4_server_caps_res res
= {};
2295 struct rpc_message msg
= {
2296 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
2302 status
= nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
2304 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
2305 server
->caps
&= ~(NFS_CAP_ACLS
|NFS_CAP_HARDLINKS
|
2306 NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
2307 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|
2308 NFS_CAP_OWNER_GROUP
|NFS_CAP_ATIME
|
2309 NFS_CAP_CTIME
|NFS_CAP_MTIME
);
2310 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
2311 server
->caps
|= NFS_CAP_ACLS
;
2312 if (res
.has_links
!= 0)
2313 server
->caps
|= NFS_CAP_HARDLINKS
;
2314 if (res
.has_symlinks
!= 0)
2315 server
->caps
|= NFS_CAP_SYMLINKS
;
2316 if (res
.attr_bitmask
[0] & FATTR4_WORD0_FILEID
)
2317 server
->caps
|= NFS_CAP_FILEID
;
2318 if (res
.attr_bitmask
[1] & FATTR4_WORD1_MODE
)
2319 server
->caps
|= NFS_CAP_MODE
;
2320 if (res
.attr_bitmask
[1] & FATTR4_WORD1_NUMLINKS
)
2321 server
->caps
|= NFS_CAP_NLINK
;
2322 if (res
.attr_bitmask
[1] & FATTR4_WORD1_OWNER
)
2323 server
->caps
|= NFS_CAP_OWNER
;
2324 if (res
.attr_bitmask
[1] & FATTR4_WORD1_OWNER_GROUP
)
2325 server
->caps
|= NFS_CAP_OWNER_GROUP
;
2326 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_ACCESS
)
2327 server
->caps
|= NFS_CAP_ATIME
;
2328 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_METADATA
)
2329 server
->caps
|= NFS_CAP_CTIME
;
2330 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_MODIFY
)
2331 server
->caps
|= NFS_CAP_MTIME
;
2333 memcpy(server
->cache_consistency_bitmask
, res
.attr_bitmask
, sizeof(server
->cache_consistency_bitmask
));
2334 server
->cache_consistency_bitmask
[0] &= FATTR4_WORD0_CHANGE
|FATTR4_WORD0_SIZE
;
2335 server
->cache_consistency_bitmask
[1] &= FATTR4_WORD1_TIME_METADATA
|FATTR4_WORD1_TIME_MODIFY
;
2336 server
->acl_bitmask
= res
.acl_bitmask
;
2337 server
->fh_expire_type
= res
.fh_expire_type
;
2343 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
2345 struct nfs4_exception exception
= { };
2348 err
= nfs4_handle_exception(server
,
2349 _nfs4_server_capabilities(server
, fhandle
),
2351 } while (exception
.retry
);
2355 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2356 struct nfs_fsinfo
*info
)
2358 struct nfs4_lookup_root_arg args
= {
2359 .bitmask
= nfs4_fattr_bitmap
,
2361 struct nfs4_lookup_res res
= {
2363 .fattr
= info
->fattr
,
2366 struct rpc_message msg
= {
2367 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
2372 nfs_fattr_init(info
->fattr
);
2373 return nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
2376 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2377 struct nfs_fsinfo
*info
)
2379 struct nfs4_exception exception
= { };
2382 err
= _nfs4_lookup_root(server
, fhandle
, info
);
2385 case -NFS4ERR_WRONGSEC
:
2388 err
= nfs4_handle_exception(server
, err
, &exception
);
2390 } while (exception
.retry
);
2395 static int nfs4_lookup_root_sec(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2396 struct nfs_fsinfo
*info
, rpc_authflavor_t flavor
)
2398 struct rpc_auth
*auth
;
2401 auth
= rpcauth_create(flavor
, server
->client
);
2406 ret
= nfs4_lookup_root(server
, fhandle
, info
);
2411 static int nfs4_find_root_sec(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2412 struct nfs_fsinfo
*info
)
2414 int i
, len
, status
= 0;
2415 rpc_authflavor_t flav_array
[NFS_MAX_SECFLAVORS
];
2417 len
= rpcauth_list_flavors(flav_array
, ARRAY_SIZE(flav_array
));
2420 for (i
= 0; i
< len
; i
++) {
2421 /* AUTH_UNIX is the default flavor if none was specified,
2422 * thus has already been tried. */
2423 if (flav_array
[i
] == RPC_AUTH_UNIX
)
2426 status
= nfs4_lookup_root_sec(server
, fhandle
, info
, flav_array
[i
]);
2427 if (status
== -NFS4ERR_WRONGSEC
|| status
== -EACCES
)
2432 * -EACCESS could mean that the user doesn't have correct permissions
2433 * to access the mount. It could also mean that we tried to mount
2434 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2435 * existing mount programs don't handle -EACCES very well so it should
2436 * be mapped to -EPERM instead.
2438 if (status
== -EACCES
)
2444 * get the file handle for the "/" directory on the server
2446 int nfs4_proc_get_rootfh(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2447 struct nfs_fsinfo
*info
)
2449 int minor_version
= server
->nfs_client
->cl_minorversion
;
2450 int status
= nfs4_lookup_root(server
, fhandle
, info
);
2451 if ((status
== -NFS4ERR_WRONGSEC
) && !(server
->flags
& NFS_MOUNT_SECFLAVOUR
))
2453 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2454 * by nfs4_map_errors() as this function exits.
2456 status
= nfs_v4_minor_ops
[minor_version
]->find_root_sec(server
, fhandle
, info
);
2458 status
= nfs4_server_capabilities(server
, fhandle
);
2460 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
2461 return nfs4_map_errors(status
);
2464 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*mntfh
,
2465 struct nfs_fsinfo
*info
)
2468 struct nfs_fattr
*fattr
= info
->fattr
;
2470 error
= nfs4_server_capabilities(server
, mntfh
);
2472 dprintk("nfs4_get_root: getcaps error = %d\n", -error
);
2476 error
= nfs4_proc_getattr(server
, mntfh
, fattr
);
2478 dprintk("nfs4_get_root: getattr error = %d\n", -error
);
2482 if (fattr
->valid
& NFS_ATTR_FATTR_FSID
&&
2483 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
))
2484 memcpy(&server
->fsid
, &fattr
->fsid
, sizeof(server
->fsid
));
2490 * Get locations and (maybe) other attributes of a referral.
2491 * Note that we'll actually follow the referral later when
2492 * we detect fsid mismatch in inode revalidation
2494 static int nfs4_get_referral(struct rpc_clnt
*client
, struct inode
*dir
,
2495 const struct qstr
*name
, struct nfs_fattr
*fattr
,
2496 struct nfs_fh
*fhandle
)
2498 int status
= -ENOMEM
;
2499 struct page
*page
= NULL
;
2500 struct nfs4_fs_locations
*locations
= NULL
;
2502 page
= alloc_page(GFP_KERNEL
);
2505 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
2506 if (locations
== NULL
)
2509 status
= nfs4_proc_fs_locations(client
, dir
, name
, locations
, page
);
2512 /* Make sure server returned a different fsid for the referral */
2513 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
2514 dprintk("%s: server did not return a different fsid for"
2515 " a referral at %s\n", __func__
, name
->name
);
2519 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2520 nfs_fixup_referral_attributes(&locations
->fattr
);
2522 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2523 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
2524 memset(fhandle
, 0, sizeof(struct nfs_fh
));
2532 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2534 struct nfs4_getattr_arg args
= {
2536 .bitmask
= server
->attr_bitmask
,
2538 struct nfs4_getattr_res res
= {
2542 struct rpc_message msg
= {
2543 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
2548 nfs_fattr_init(fattr
);
2549 return nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
2552 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2554 struct nfs4_exception exception
= { };
2557 err
= nfs4_handle_exception(server
,
2558 _nfs4_proc_getattr(server
, fhandle
, fattr
),
2560 } while (exception
.retry
);
2565 * The file is not closed if it is opened due to the a request to change
2566 * the size of the file. The open call will not be needed once the
2567 * VFS layer lookup-intents are implemented.
2569 * Close is called when the inode is destroyed.
2570 * If we haven't opened the file for O_WRONLY, we
2571 * need to in the size_change case to obtain a stateid.
2574 * Because OPEN is always done by name in nfsv4, it is
2575 * possible that we opened a different file by the same
2576 * name. We can recognize this race condition, but we
2577 * can't do anything about it besides returning an error.
2579 * This will be fixed with VFS changes (lookup-intent).
2582 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
2583 struct iattr
*sattr
)
2585 struct inode
*inode
= dentry
->d_inode
;
2586 struct rpc_cred
*cred
= NULL
;
2587 struct nfs4_state
*state
= NULL
;
2590 if (pnfs_ld_layoutret_on_setattr(inode
))
2591 pnfs_return_layout(inode
);
2593 nfs_fattr_init(fattr
);
2595 /* Deal with open(O_TRUNC) */
2596 if (sattr
->ia_valid
& ATTR_OPEN
)
2597 sattr
->ia_valid
&= ~(ATTR_MTIME
|ATTR_CTIME
|ATTR_OPEN
);
2599 /* Optimization: if the end result is no change, don't RPC */
2600 if ((sattr
->ia_valid
& ~(ATTR_FILE
)) == 0)
2603 /* Search for an existing open(O_WRITE) file */
2604 if (sattr
->ia_valid
& ATTR_FILE
) {
2605 struct nfs_open_context
*ctx
;
2607 ctx
= nfs_file_open_context(sattr
->ia_file
);
2614 status
= nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
);
2616 nfs_setattr_update_inode(inode
, sattr
);
2620 static int _nfs4_proc_lookup(struct rpc_clnt
*clnt
, struct inode
*dir
,
2621 const struct qstr
*name
, struct nfs_fh
*fhandle
,
2622 struct nfs_fattr
*fattr
)
2624 struct nfs_server
*server
= NFS_SERVER(dir
);
2626 struct nfs4_lookup_arg args
= {
2627 .bitmask
= server
->attr_bitmask
,
2628 .dir_fh
= NFS_FH(dir
),
2631 struct nfs4_lookup_res res
= {
2636 struct rpc_message msg
= {
2637 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
2642 nfs_fattr_init(fattr
);
2644 dprintk("NFS call lookup %s\n", name
->name
);
2645 status
= nfs4_call_sync(clnt
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
2646 dprintk("NFS reply lookup: %d\n", status
);
2650 static void nfs_fixup_secinfo_attributes(struct nfs_fattr
*fattr
)
2652 fattr
->valid
|= NFS_ATTR_FATTR_TYPE
| NFS_ATTR_FATTR_MODE
|
2653 NFS_ATTR_FATTR_NLINK
| NFS_ATTR_FATTR_MOUNTPOINT
;
2654 fattr
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
2658 static int nfs4_proc_lookup_common(struct rpc_clnt
**clnt
, struct inode
*dir
,
2659 struct qstr
*name
, struct nfs_fh
*fhandle
,
2660 struct nfs_fattr
*fattr
)
2662 struct nfs4_exception exception
= { };
2663 struct rpc_clnt
*client
= *clnt
;
2666 err
= _nfs4_proc_lookup(client
, dir
, name
, fhandle
, fattr
);
2668 case -NFS4ERR_BADNAME
:
2671 case -NFS4ERR_MOVED
:
2672 err
= nfs4_get_referral(client
, dir
, name
, fattr
, fhandle
);
2674 case -NFS4ERR_WRONGSEC
:
2676 if (client
!= *clnt
)
2679 client
= nfs4_create_sec_client(client
, dir
, name
);
2681 return PTR_ERR(client
);
2683 exception
.retry
= 1;
2686 err
= nfs4_handle_exception(NFS_SERVER(dir
), err
, &exception
);
2688 } while (exception
.retry
);
2693 else if (client
!= *clnt
)
2694 rpc_shutdown_client(client
);
2699 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
,
2700 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2703 struct rpc_clnt
*client
= NFS_CLIENT(dir
);
2705 status
= nfs4_proc_lookup_common(&client
, dir
, name
, fhandle
, fattr
);
2706 if (client
!= NFS_CLIENT(dir
)) {
2707 rpc_shutdown_client(client
);
2708 nfs_fixup_secinfo_attributes(fattr
);
2714 nfs4_proc_lookup_mountpoint(struct inode
*dir
, struct qstr
*name
,
2715 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2718 struct rpc_clnt
*client
= rpc_clone_client(NFS_CLIENT(dir
));
2720 status
= nfs4_proc_lookup_common(&client
, dir
, name
, fhandle
, fattr
);
2722 rpc_shutdown_client(client
);
2723 return ERR_PTR(status
);
2728 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
2730 struct nfs_server
*server
= NFS_SERVER(inode
);
2731 struct nfs4_accessargs args
= {
2732 .fh
= NFS_FH(inode
),
2733 .bitmask
= server
->cache_consistency_bitmask
,
2735 struct nfs4_accessres res
= {
2738 struct rpc_message msg
= {
2739 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
2742 .rpc_cred
= entry
->cred
,
2744 int mode
= entry
->mask
;
2748 * Determine which access bits we want to ask for...
2750 if (mode
& MAY_READ
)
2751 args
.access
|= NFS4_ACCESS_READ
;
2752 if (S_ISDIR(inode
->i_mode
)) {
2753 if (mode
& MAY_WRITE
)
2754 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
2755 if (mode
& MAY_EXEC
)
2756 args
.access
|= NFS4_ACCESS_LOOKUP
;
2758 if (mode
& MAY_WRITE
)
2759 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
2760 if (mode
& MAY_EXEC
)
2761 args
.access
|= NFS4_ACCESS_EXECUTE
;
2764 res
.fattr
= nfs_alloc_fattr();
2765 if (res
.fattr
== NULL
)
2768 status
= nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
2771 if (res
.access
& NFS4_ACCESS_READ
)
2772 entry
->mask
|= MAY_READ
;
2773 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
2774 entry
->mask
|= MAY_WRITE
;
2775 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
2776 entry
->mask
|= MAY_EXEC
;
2777 nfs_refresh_inode(inode
, res
.fattr
);
2779 nfs_free_fattr(res
.fattr
);
2783 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
2785 struct nfs4_exception exception
= { };
2788 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2789 _nfs4_proc_access(inode
, entry
),
2791 } while (exception
.retry
);
2796 * TODO: For the time being, we don't try to get any attributes
2797 * along with any of the zero-copy operations READ, READDIR,
2800 * In the case of the first three, we want to put the GETATTR
2801 * after the read-type operation -- this is because it is hard
2802 * to predict the length of a GETATTR response in v4, and thus
2803 * align the READ data correctly. This means that the GETATTR
2804 * may end up partially falling into the page cache, and we should
2805 * shift it into the 'tail' of the xdr_buf before processing.
2806 * To do this efficiently, we need to know the total length
2807 * of data received, which doesn't seem to be available outside
2810 * In the case of WRITE, we also want to put the GETATTR after
2811 * the operation -- in this case because we want to make sure
2812 * we get the post-operation mtime and size.
2814 * Both of these changes to the XDR layer would in fact be quite
2815 * minor, but I decided to leave them for a subsequent patch.
2817 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2818 unsigned int pgbase
, unsigned int pglen
)
2820 struct nfs4_readlink args
= {
2821 .fh
= NFS_FH(inode
),
2826 struct nfs4_readlink_res res
;
2827 struct rpc_message msg
= {
2828 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
2833 return nfs4_call_sync(NFS_SERVER(inode
)->client
, NFS_SERVER(inode
), &msg
, &args
.seq_args
, &res
.seq_res
, 0);
2836 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2837 unsigned int pgbase
, unsigned int pglen
)
2839 struct nfs4_exception exception
= { };
2842 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2843 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
2845 } while (exception
.retry
);
2850 * This is just for mknod. open(O_CREAT) will always do ->open_context().
2853 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
2856 struct nfs_open_context
*ctx
;
2857 struct nfs4_state
*state
;
2860 ctx
= alloc_nfs_open_context(dentry
, FMODE_READ
);
2862 return PTR_ERR(ctx
);
2864 sattr
->ia_mode
&= ~current_umask();
2865 state
= nfs4_do_open(dir
, dentry
, ctx
->mode
,
2866 flags
, sattr
, ctx
->cred
,
2867 &ctx
->mdsthreshold
);
2869 if (IS_ERR(state
)) {
2870 status
= PTR_ERR(state
);
2873 d_add(dentry
, igrab(state
->inode
));
2874 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2877 put_nfs_open_context(ctx
);
2881 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2883 struct nfs_server
*server
= NFS_SERVER(dir
);
2884 struct nfs_removeargs args
= {
2888 struct nfs_removeres res
= {
2891 struct rpc_message msg
= {
2892 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
2898 status
= nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 1);
2900 update_changeattr(dir
, &res
.cinfo
);
2904 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2906 struct nfs4_exception exception
= { };
2909 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2910 _nfs4_proc_remove(dir
, name
),
2912 } while (exception
.retry
);
2916 static void nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct inode
*dir
)
2918 struct nfs_server
*server
= NFS_SERVER(dir
);
2919 struct nfs_removeargs
*args
= msg
->rpc_argp
;
2920 struct nfs_removeres
*res
= msg
->rpc_resp
;
2922 res
->server
= server
;
2923 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
2924 nfs41_init_sequence(&args
->seq_args
, &res
->seq_res
, 1);
2927 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task
*task
, struct nfs_unlinkdata
*data
)
2929 if (nfs4_setup_sequence(NFS_SERVER(data
->dir
),
2930 &data
->args
.seq_args
,
2934 rpc_call_start(task
);
2937 static int nfs4_proc_unlink_done(struct rpc_task
*task
, struct inode
*dir
)
2939 struct nfs_removeres
*res
= task
->tk_msg
.rpc_resp
;
2941 if (!nfs4_sequence_done(task
, &res
->seq_res
))
2943 if (nfs4_async_handle_error(task
, res
->server
, NULL
) == -EAGAIN
)
2945 update_changeattr(dir
, &res
->cinfo
);
2949 static void nfs4_proc_rename_setup(struct rpc_message
*msg
, struct inode
*dir
)
2951 struct nfs_server
*server
= NFS_SERVER(dir
);
2952 struct nfs_renameargs
*arg
= msg
->rpc_argp
;
2953 struct nfs_renameres
*res
= msg
->rpc_resp
;
2955 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
];
2956 res
->server
= server
;
2957 nfs41_init_sequence(&arg
->seq_args
, &res
->seq_res
, 1);
2960 static void nfs4_proc_rename_rpc_prepare(struct rpc_task
*task
, struct nfs_renamedata
*data
)
2962 if (nfs4_setup_sequence(NFS_SERVER(data
->old_dir
),
2963 &data
->args
.seq_args
,
2967 rpc_call_start(task
);
2970 static int nfs4_proc_rename_done(struct rpc_task
*task
, struct inode
*old_dir
,
2971 struct inode
*new_dir
)
2973 struct nfs_renameres
*res
= task
->tk_msg
.rpc_resp
;
2975 if (!nfs4_sequence_done(task
, &res
->seq_res
))
2977 if (nfs4_async_handle_error(task
, res
->server
, NULL
) == -EAGAIN
)
2980 update_changeattr(old_dir
, &res
->old_cinfo
);
2981 update_changeattr(new_dir
, &res
->new_cinfo
);
2985 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2986 struct inode
*new_dir
, struct qstr
*new_name
)
2988 struct nfs_server
*server
= NFS_SERVER(old_dir
);
2989 struct nfs_renameargs arg
= {
2990 .old_dir
= NFS_FH(old_dir
),
2991 .new_dir
= NFS_FH(new_dir
),
2992 .old_name
= old_name
,
2993 .new_name
= new_name
,
2995 struct nfs_renameres res
= {
2998 struct rpc_message msg
= {
2999 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
3003 int status
= -ENOMEM
;
3005 status
= nfs4_call_sync(server
->client
, server
, &msg
, &arg
.seq_args
, &res
.seq_res
, 1);
3007 update_changeattr(old_dir
, &res
.old_cinfo
);
3008 update_changeattr(new_dir
, &res
.new_cinfo
);
3013 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
3014 struct inode
*new_dir
, struct qstr
*new_name
)
3016 struct nfs4_exception exception
= { };
3019 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
3020 _nfs4_proc_rename(old_dir
, old_name
,
3023 } while (exception
.retry
);
3027 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
3029 struct nfs_server
*server
= NFS_SERVER(inode
);
3030 struct nfs4_link_arg arg
= {
3031 .fh
= NFS_FH(inode
),
3032 .dir_fh
= NFS_FH(dir
),
3034 .bitmask
= server
->attr_bitmask
,
3036 struct nfs4_link_res res
= {
3039 struct rpc_message msg
= {
3040 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
3044 int status
= -ENOMEM
;
3046 res
.fattr
= nfs_alloc_fattr();
3047 if (res
.fattr
== NULL
)
3050 status
= nfs4_call_sync(server
->client
, server
, &msg
, &arg
.seq_args
, &res
.seq_res
, 1);
3052 update_changeattr(dir
, &res
.cinfo
);
3053 nfs_post_op_update_inode(inode
, res
.fattr
);
3056 nfs_free_fattr(res
.fattr
);
3060 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
3062 struct nfs4_exception exception
= { };
3065 err
= nfs4_handle_exception(NFS_SERVER(inode
),
3066 _nfs4_proc_link(inode
, dir
, name
),
3068 } while (exception
.retry
);
3072 struct nfs4_createdata
{
3073 struct rpc_message msg
;
3074 struct nfs4_create_arg arg
;
3075 struct nfs4_create_res res
;
3077 struct nfs_fattr fattr
;
3080 static struct nfs4_createdata
*nfs4_alloc_createdata(struct inode
*dir
,
3081 struct qstr
*name
, struct iattr
*sattr
, u32 ftype
)
3083 struct nfs4_createdata
*data
;
3085 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
3087 struct nfs_server
*server
= NFS_SERVER(dir
);
3089 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
];
3090 data
->msg
.rpc_argp
= &data
->arg
;
3091 data
->msg
.rpc_resp
= &data
->res
;
3092 data
->arg
.dir_fh
= NFS_FH(dir
);
3093 data
->arg
.server
= server
;
3094 data
->arg
.name
= name
;
3095 data
->arg
.attrs
= sattr
;
3096 data
->arg
.ftype
= ftype
;
3097 data
->arg
.bitmask
= server
->attr_bitmask
;
3098 data
->res
.server
= server
;
3099 data
->res
.fh
= &data
->fh
;
3100 data
->res
.fattr
= &data
->fattr
;
3101 nfs_fattr_init(data
->res
.fattr
);
3106 static int nfs4_do_create(struct inode
*dir
, struct dentry
*dentry
, struct nfs4_createdata
*data
)
3108 int status
= nfs4_call_sync(NFS_SERVER(dir
)->client
, NFS_SERVER(dir
), &data
->msg
,
3109 &data
->arg
.seq_args
, &data
->res
.seq_res
, 1);
3111 update_changeattr(dir
, &data
->res
.dir_cinfo
);
3112 status
= nfs_instantiate(dentry
, data
->res
.fh
, data
->res
.fattr
);
3117 static void nfs4_free_createdata(struct nfs4_createdata
*data
)
3122 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
3123 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
3125 struct nfs4_createdata
*data
;
3126 int status
= -ENAMETOOLONG
;
3128 if (len
> NFS4_MAXPATHLEN
)
3132 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4LNK
);
3136 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
];
3137 data
->arg
.u
.symlink
.pages
= &page
;
3138 data
->arg
.u
.symlink
.len
= len
;
3140 status
= nfs4_do_create(dir
, dentry
, data
);
3142 nfs4_free_createdata(data
);
3147 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
3148 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
3150 struct nfs4_exception exception
= { };
3153 err
= nfs4_handle_exception(NFS_SERVER(dir
),
3154 _nfs4_proc_symlink(dir
, dentry
, page
,
3157 } while (exception
.retry
);
3161 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
3162 struct iattr
*sattr
)
3164 struct nfs4_createdata
*data
;
3165 int status
= -ENOMEM
;
3167 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4DIR
);
3171 status
= nfs4_do_create(dir
, dentry
, data
);
3173 nfs4_free_createdata(data
);
3178 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
3179 struct iattr
*sattr
)
3181 struct nfs4_exception exception
= { };
3184 sattr
->ia_mode
&= ~current_umask();
3186 err
= nfs4_handle_exception(NFS_SERVER(dir
),
3187 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
3189 } while (exception
.retry
);
3193 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
3194 u64 cookie
, struct page
**pages
, unsigned int count
, int plus
)
3196 struct inode
*dir
= dentry
->d_inode
;
3197 struct nfs4_readdir_arg args
= {
3202 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
3205 struct nfs4_readdir_res res
;
3206 struct rpc_message msg
= {
3207 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
3214 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__
,
3215 dentry
->d_parent
->d_name
.name
,
3216 dentry
->d_name
.name
,
3217 (unsigned long long)cookie
);
3218 nfs4_setup_readdir(cookie
, NFS_I(dir
)->cookieverf
, dentry
, &args
);
3219 res
.pgbase
= args
.pgbase
;
3220 status
= nfs4_call_sync(NFS_SERVER(dir
)->client
, NFS_SERVER(dir
), &msg
, &args
.seq_args
, &res
.seq_res
, 0);
3222 memcpy(NFS_I(dir
)->cookieverf
, res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
3223 status
+= args
.pgbase
;
3226 nfs_invalidate_atime(dir
);
3228 dprintk("%s: returns %d\n", __func__
, status
);
3232 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
3233 u64 cookie
, struct page
**pages
, unsigned int count
, int plus
)
3235 struct nfs4_exception exception
= { };
3238 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
3239 _nfs4_proc_readdir(dentry
, cred
, cookie
,
3240 pages
, count
, plus
),
3242 } while (exception
.retry
);
3246 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
3247 struct iattr
*sattr
, dev_t rdev
)
3249 struct nfs4_createdata
*data
;
3250 int mode
= sattr
->ia_mode
;
3251 int status
= -ENOMEM
;
3253 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
3254 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
3256 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4SOCK
);
3261 data
->arg
.ftype
= NF4FIFO
;
3262 else if (S_ISBLK(mode
)) {
3263 data
->arg
.ftype
= NF4BLK
;
3264 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
3265 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
3267 else if (S_ISCHR(mode
)) {
3268 data
->arg
.ftype
= NF4CHR
;
3269 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
3270 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
3273 status
= nfs4_do_create(dir
, dentry
, data
);
3275 nfs4_free_createdata(data
);
3280 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
3281 struct iattr
*sattr
, dev_t rdev
)
3283 struct nfs4_exception exception
= { };
3286 sattr
->ia_mode
&= ~current_umask();
3288 err
= nfs4_handle_exception(NFS_SERVER(dir
),
3289 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
3291 } while (exception
.retry
);
3295 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3296 struct nfs_fsstat
*fsstat
)
3298 struct nfs4_statfs_arg args
= {
3300 .bitmask
= server
->attr_bitmask
,
3302 struct nfs4_statfs_res res
= {
3305 struct rpc_message msg
= {
3306 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
3311 nfs_fattr_init(fsstat
->fattr
);
3312 return nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
3315 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
3317 struct nfs4_exception exception
= { };
3320 err
= nfs4_handle_exception(server
,
3321 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
3323 } while (exception
.retry
);
3327 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3328 struct nfs_fsinfo
*fsinfo
)
3330 struct nfs4_fsinfo_arg args
= {
3332 .bitmask
= server
->attr_bitmask
,
3334 struct nfs4_fsinfo_res res
= {
3337 struct rpc_message msg
= {
3338 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
3343 return nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
3346 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
3348 struct nfs4_exception exception
= { };
3352 err
= nfs4_handle_exception(server
,
3353 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
3355 } while (exception
.retry
);
3359 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
3363 nfs_fattr_init(fsinfo
->fattr
);
3364 error
= nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
3366 set_pnfs_layoutdriver(server
, fhandle
, fsinfo
->layouttype
);
3371 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3372 struct nfs_pathconf
*pathconf
)
3374 struct nfs4_pathconf_arg args
= {
3376 .bitmask
= server
->attr_bitmask
,
3378 struct nfs4_pathconf_res res
= {
3379 .pathconf
= pathconf
,
3381 struct rpc_message msg
= {
3382 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
3387 /* None of the pathconf attributes are mandatory to implement */
3388 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
3389 memset(pathconf
, 0, sizeof(*pathconf
));
3393 nfs_fattr_init(pathconf
->fattr
);
3394 return nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
3397 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3398 struct nfs_pathconf
*pathconf
)
3400 struct nfs4_exception exception
= { };
3404 err
= nfs4_handle_exception(server
,
3405 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
3407 } while (exception
.retry
);
3411 void __nfs4_read_done_cb(struct nfs_read_data
*data
)
3413 nfs_invalidate_atime(data
->header
->inode
);
3416 static int nfs4_read_done_cb(struct rpc_task
*task
, struct nfs_read_data
*data
)
3418 struct nfs_server
*server
= NFS_SERVER(data
->header
->inode
);
3420 if (nfs4_async_handle_error(task
, server
, data
->args
.context
->state
) == -EAGAIN
) {
3421 rpc_restart_call_prepare(task
);
3425 __nfs4_read_done_cb(data
);
3426 if (task
->tk_status
> 0)
3427 renew_lease(server
, data
->timestamp
);
3431 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
3434 dprintk("--> %s\n", __func__
);
3436 if (!nfs4_sequence_done(task
, &data
->res
.seq_res
))
3439 return data
->read_done_cb
? data
->read_done_cb(task
, data
) :
3440 nfs4_read_done_cb(task
, data
);
3443 static void nfs4_proc_read_setup(struct nfs_read_data
*data
, struct rpc_message
*msg
)
3445 data
->timestamp
= jiffies
;
3446 data
->read_done_cb
= nfs4_read_done_cb
;
3447 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
];
3448 nfs41_init_sequence(&data
->args
.seq_args
, &data
->res
.seq_res
, 0);
3451 static void nfs4_proc_read_rpc_prepare(struct rpc_task
*task
, struct nfs_read_data
*data
)
3453 if (nfs4_setup_sequence(NFS_SERVER(data
->header
->inode
),
3454 &data
->args
.seq_args
,
3458 rpc_call_start(task
);
3461 static int nfs4_write_done_cb(struct rpc_task
*task
, struct nfs_write_data
*data
)
3463 struct inode
*inode
= data
->header
->inode
;
3465 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), data
->args
.context
->state
) == -EAGAIN
) {
3466 rpc_restart_call_prepare(task
);
3469 if (task
->tk_status
>= 0) {
3470 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
3471 nfs_post_op_update_inode_force_wcc(inode
, &data
->fattr
);
3476 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
3478 if (!nfs4_sequence_done(task
, &data
->res
.seq_res
))
3480 return data
->write_done_cb
? data
->write_done_cb(task
, data
) :
3481 nfs4_write_done_cb(task
, data
);
3485 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data
*data
)
3487 const struct nfs_pgio_header
*hdr
= data
->header
;
3489 /* Don't request attributes for pNFS or O_DIRECT writes */
3490 if (data
->ds_clp
!= NULL
|| hdr
->dreq
!= NULL
)
3492 /* Otherwise, request attributes if and only if we don't hold
3495 return nfs4_have_delegation(hdr
->inode
, FMODE_READ
) == 0;
3498 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
3500 struct nfs_server
*server
= NFS_SERVER(data
->header
->inode
);
3502 if (!nfs4_write_need_cache_consistency_data(data
)) {
3503 data
->args
.bitmask
= NULL
;
3504 data
->res
.fattr
= NULL
;
3506 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
3508 if (!data
->write_done_cb
)
3509 data
->write_done_cb
= nfs4_write_done_cb
;
3510 data
->res
.server
= server
;
3511 data
->timestamp
= jiffies
;
3513 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
];
3514 nfs41_init_sequence(&data
->args
.seq_args
, &data
->res
.seq_res
, 1);
3517 static void nfs4_proc_write_rpc_prepare(struct rpc_task
*task
, struct nfs_write_data
*data
)
3519 if (nfs4_setup_sequence(NFS_SERVER(data
->header
->inode
),
3520 &data
->args
.seq_args
,
3524 rpc_call_start(task
);
3527 static void nfs4_proc_commit_rpc_prepare(struct rpc_task
*task
, struct nfs_commit_data
*data
)
3529 if (nfs4_setup_sequence(NFS_SERVER(data
->inode
),
3530 &data
->args
.seq_args
,
3534 rpc_call_start(task
);
3537 static int nfs4_commit_done_cb(struct rpc_task
*task
, struct nfs_commit_data
*data
)
3539 struct inode
*inode
= data
->inode
;
3541 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), NULL
) == -EAGAIN
) {
3542 rpc_restart_call_prepare(task
);
3548 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_commit_data
*data
)
3550 if (!nfs4_sequence_done(task
, &data
->res
.seq_res
))
3552 return data
->commit_done_cb(task
, data
);
3555 static void nfs4_proc_commit_setup(struct nfs_commit_data
*data
, struct rpc_message
*msg
)
3557 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
3559 if (data
->commit_done_cb
== NULL
)
3560 data
->commit_done_cb
= nfs4_commit_done_cb
;
3561 data
->res
.server
= server
;
3562 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
];
3563 nfs41_init_sequence(&data
->args
.seq_args
, &data
->res
.seq_res
, 1);
3566 struct nfs4_renewdata
{
3567 struct nfs_client
*client
;
3568 unsigned long timestamp
;
3572 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3573 * standalone procedure for queueing an asynchronous RENEW.
3575 static void nfs4_renew_release(void *calldata
)
3577 struct nfs4_renewdata
*data
= calldata
;
3578 struct nfs_client
*clp
= data
->client
;
3580 if (atomic_read(&clp
->cl_count
) > 1)
3581 nfs4_schedule_state_renewal(clp
);
3582 nfs_put_client(clp
);
3586 static void nfs4_renew_done(struct rpc_task
*task
, void *calldata
)
3588 struct nfs4_renewdata
*data
= calldata
;
3589 struct nfs_client
*clp
= data
->client
;
3590 unsigned long timestamp
= data
->timestamp
;
3592 if (task
->tk_status
< 0) {
3593 /* Unless we're shutting down, schedule state recovery! */
3594 if (test_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
) == 0)
3596 if (task
->tk_status
!= NFS4ERR_CB_PATH_DOWN
) {
3597 nfs4_schedule_lease_recovery(clp
);
3600 nfs4_schedule_path_down_recovery(clp
);
3602 do_renew_lease(clp
, timestamp
);
3605 static const struct rpc_call_ops nfs4_renew_ops
= {
3606 .rpc_call_done
= nfs4_renew_done
,
3607 .rpc_release
= nfs4_renew_release
,
3610 static int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
, unsigned renew_flags
)
3612 struct rpc_message msg
= {
3613 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
3617 struct nfs4_renewdata
*data
;
3619 if (renew_flags
== 0)
3621 if (!atomic_inc_not_zero(&clp
->cl_count
))
3623 data
= kmalloc(sizeof(*data
), GFP_NOFS
);
3627 data
->timestamp
= jiffies
;
3628 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
3629 &nfs4_renew_ops
, data
);
3632 static int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3634 struct rpc_message msg
= {
3635 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
3639 unsigned long now
= jiffies
;
3642 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3645 do_renew_lease(clp
, now
);
3649 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
3651 return (server
->caps
& NFS_CAP_ACLS
)
3652 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
3653 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
3656 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3657 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3660 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3662 static int buf_to_pages_noslab(const void *buf
, size_t buflen
,
3663 struct page
**pages
, unsigned int *pgbase
)
3665 struct page
*newpage
, **spages
;
3671 len
= min_t(size_t, PAGE_SIZE
, buflen
);
3672 newpage
= alloc_page(GFP_KERNEL
);
3674 if (newpage
== NULL
)
3676 memcpy(page_address(newpage
), buf
, len
);
3681 } while (buflen
!= 0);
3687 __free_page(spages
[rc
-1]);
3691 struct nfs4_cached_acl
{
3697 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
3699 struct nfs_inode
*nfsi
= NFS_I(inode
);
3701 spin_lock(&inode
->i_lock
);
3702 kfree(nfsi
->nfs4_acl
);
3703 nfsi
->nfs4_acl
= acl
;
3704 spin_unlock(&inode
->i_lock
);
3707 static void nfs4_zap_acl_attr(struct inode
*inode
)
3709 nfs4_set_cached_acl(inode
, NULL
);
3712 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
3714 struct nfs_inode
*nfsi
= NFS_I(inode
);
3715 struct nfs4_cached_acl
*acl
;
3718 spin_lock(&inode
->i_lock
);
3719 acl
= nfsi
->nfs4_acl
;
3722 if (buf
== NULL
) /* user is just asking for length */
3724 if (acl
->cached
== 0)
3726 ret
= -ERANGE
; /* see getxattr(2) man page */
3727 if (acl
->len
> buflen
)
3729 memcpy(buf
, acl
->data
, acl
->len
);
3733 spin_unlock(&inode
->i_lock
);
3737 static void nfs4_write_cached_acl(struct inode
*inode
, struct page
**pages
, size_t pgbase
, size_t acl_len
)
3739 struct nfs4_cached_acl
*acl
;
3740 size_t buflen
= sizeof(*acl
) + acl_len
;
3742 if (buflen
<= PAGE_SIZE
) {
3743 acl
= kmalloc(buflen
, GFP_KERNEL
);
3747 _copy_from_pages(acl
->data
, pages
, pgbase
, acl_len
);
3749 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
3756 nfs4_set_cached_acl(inode
, acl
);
3760 * The getxattr API returns the required buffer length when called with a
3761 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3762 * the required buf. On a NULL buf, we send a page of data to the server
3763 * guessing that the ACL request can be serviced by a page. If so, we cache
3764 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3765 * the cache. If not so, we throw away the page, and cache the required
3766 * length. The next getxattr call will then produce another round trip to
3767 * the server, this time with the input buf of the required size.
3769 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3771 struct page
*pages
[NFS4ACL_MAXPAGES
] = {NULL
, };
3772 struct nfs_getaclargs args
= {
3773 .fh
= NFS_FH(inode
),
3777 struct nfs_getaclres res
= {
3780 struct rpc_message msg
= {
3781 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
3785 unsigned int npages
= DIV_ROUND_UP(buflen
, PAGE_SIZE
);
3786 int ret
= -ENOMEM
, i
;
3788 /* As long as we're doing a round trip to the server anyway,
3789 * let's be prepared for a page of acl data. */
3792 if (npages
> ARRAY_SIZE(pages
))
3795 for (i
= 0; i
< npages
; i
++) {
3796 pages
[i
] = alloc_page(GFP_KERNEL
);
3801 /* for decoding across pages */
3802 res
.acl_scratch
= alloc_page(GFP_KERNEL
);
3803 if (!res
.acl_scratch
)
3806 args
.acl_len
= npages
* PAGE_SIZE
;
3807 args
.acl_pgbase
= 0;
3809 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3810 __func__
, buf
, buflen
, npages
, args
.acl_len
);
3811 ret
= nfs4_call_sync(NFS_SERVER(inode
)->client
, NFS_SERVER(inode
),
3812 &msg
, &args
.seq_args
, &res
.seq_res
, 0);
3816 /* Handle the case where the passed-in buffer is too short */
3817 if (res
.acl_flags
& NFS4_ACL_TRUNC
) {
3818 /* Did the user only issue a request for the acl length? */
3824 nfs4_write_cached_acl(inode
, pages
, res
.acl_data_offset
, res
.acl_len
);
3826 _copy_from_pages(buf
, pages
, res
.acl_data_offset
, res
.acl_len
);
3830 for (i
= 0; i
< npages
; i
++)
3832 __free_page(pages
[i
]);
3833 if (res
.acl_scratch
)
3834 __free_page(res
.acl_scratch
);
3838 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3840 struct nfs4_exception exception
= { };
3843 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
3846 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
3847 } while (exception
.retry
);
3851 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
3853 struct nfs_server
*server
= NFS_SERVER(inode
);
3856 if (!nfs4_server_supports_acls(server
))
3858 ret
= nfs_revalidate_inode(server
, inode
);
3861 if (NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ACL
)
3862 nfs_zap_acl_cache(inode
);
3863 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
3865 /* -ENOENT is returned if there is no ACL or if there is an ACL
3866 * but no cached acl data, just the acl length */
3868 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
3871 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3873 struct nfs_server
*server
= NFS_SERVER(inode
);
3874 struct page
*pages
[NFS4ACL_MAXPAGES
];
3875 struct nfs_setaclargs arg
= {
3876 .fh
= NFS_FH(inode
),
3880 struct nfs_setaclres res
;
3881 struct rpc_message msg
= {
3882 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
3886 unsigned int npages
= DIV_ROUND_UP(buflen
, PAGE_SIZE
);
3889 if (!nfs4_server_supports_acls(server
))
3891 if (npages
> ARRAY_SIZE(pages
))
3893 i
= buf_to_pages_noslab(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
3896 nfs4_inode_return_delegation(inode
);
3897 ret
= nfs4_call_sync(server
->client
, server
, &msg
, &arg
.seq_args
, &res
.seq_res
, 1);
3900 * Free each page after tx, so the only ref left is
3901 * held by the network stack
3904 put_page(pages
[i
-1]);
3907 * Acl update can result in inode attribute update.
3908 * so mark the attribute cache invalid.
3910 spin_lock(&inode
->i_lock
);
3911 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ATTR
;
3912 spin_unlock(&inode
->i_lock
);
3913 nfs_access_zap_cache(inode
);
3914 nfs_zap_acl_cache(inode
);
3918 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3920 struct nfs4_exception exception
= { };
3923 err
= nfs4_handle_exception(NFS_SERVER(inode
),
3924 __nfs4_proc_set_acl(inode
, buf
, buflen
),
3926 } while (exception
.retry
);
3931 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs4_state
*state
)
3933 struct nfs_client
*clp
= server
->nfs_client
;
3935 if (task
->tk_status
>= 0)
3937 switch(task
->tk_status
) {
3938 case -NFS4ERR_DELEG_REVOKED
:
3939 case -NFS4ERR_ADMIN_REVOKED
:
3940 case -NFS4ERR_BAD_STATEID
:
3943 nfs_remove_bad_delegation(state
->inode
);
3944 case -NFS4ERR_OPENMODE
:
3947 nfs4_schedule_stateid_recovery(server
, state
);
3948 goto wait_on_recovery
;
3949 case -NFS4ERR_EXPIRED
:
3951 nfs4_schedule_stateid_recovery(server
, state
);
3952 case -NFS4ERR_STALE_STATEID
:
3953 case -NFS4ERR_STALE_CLIENTID
:
3954 nfs4_schedule_lease_recovery(clp
);
3955 goto wait_on_recovery
;
3956 #if defined(CONFIG_NFS_V4_1)
3957 case -NFS4ERR_BADSESSION
:
3958 case -NFS4ERR_BADSLOT
:
3959 case -NFS4ERR_BAD_HIGH_SLOT
:
3960 case -NFS4ERR_DEADSESSION
:
3961 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
3962 case -NFS4ERR_SEQ_FALSE_RETRY
:
3963 case -NFS4ERR_SEQ_MISORDERED
:
3964 dprintk("%s ERROR %d, Reset session\n", __func__
,
3966 nfs4_schedule_session_recovery(clp
->cl_session
, task
->tk_status
);
3967 task
->tk_status
= 0;
3969 #endif /* CONFIG_NFS_V4_1 */
3970 case -NFS4ERR_DELAY
:
3971 nfs_inc_server_stats(server
, NFSIOS_DELAY
);
3972 case -NFS4ERR_GRACE
:
3974 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
3975 task
->tk_status
= 0;
3977 case -NFS4ERR_RETRY_UNCACHED_REP
:
3978 case -NFS4ERR_OLD_STATEID
:
3979 task
->tk_status
= 0;
3982 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
3985 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
);
3986 if (test_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) == 0)
3987 rpc_wake_up_queued_task(&clp
->cl_rpcwaitq
, task
);
3988 task
->tk_status
= 0;
3992 static void nfs4_init_boot_verifier(const struct nfs_client
*clp
,
3993 nfs4_verifier
*bootverf
)
3997 if (test_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
)) {
3998 /* An impossible timestamp guarantees this value
3999 * will never match a generated boot time. */
4001 verf
[1] = (__be32
)(NSEC_PER_SEC
+ 1);
4003 struct nfs_net
*nn
= net_generic(clp
->cl_net
, nfs_net_id
);
4004 verf
[0] = (__be32
)nn
->boot_time
.tv_sec
;
4005 verf
[1] = (__be32
)nn
->boot_time
.tv_nsec
;
4007 memcpy(bootverf
->data
, verf
, sizeof(bootverf
->data
));
4011 * nfs4_proc_setclientid - Negotiate client ID
4012 * @clp: state data structure
4013 * @program: RPC program for NFSv4 callback service
4014 * @port: IP port number for NFS4 callback service
4015 * @cred: RPC credential to use for this call
4016 * @res: where to place the result
4018 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4020 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
,
4021 unsigned short port
, struct rpc_cred
*cred
,
4022 struct nfs4_setclientid_res
*res
)
4024 nfs4_verifier sc_verifier
;
4025 struct nfs4_setclientid setclientid
= {
4026 .sc_verifier
= &sc_verifier
,
4028 .sc_cb_ident
= clp
->cl_cb_ident
,
4030 struct rpc_message msg
= {
4031 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
4032 .rpc_argp
= &setclientid
,
4038 /* nfs_client_id4 */
4039 nfs4_init_boot_verifier(clp
, &sc_verifier
);
4041 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
4042 sizeof(setclientid
.sc_name
), "%s/%s %s",
4044 rpc_peeraddr2str(clp
->cl_rpcclient
,
4046 rpc_peeraddr2str(clp
->cl_rpcclient
,
4047 RPC_DISPLAY_PROTO
));
4049 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
4050 sizeof(setclientid
.sc_netid
),
4051 rpc_peeraddr2str(clp
->cl_rpcclient
,
4052 RPC_DISPLAY_NETID
));
4054 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
4055 sizeof(setclientid
.sc_uaddr
), "%s.%u.%u",
4056 clp
->cl_ipaddr
, port
>> 8, port
& 255);
4058 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4059 clp
->cl_rpcclient
->cl_auth
->au_ops
->au_name
,
4060 setclientid
.sc_name_len
, setclientid
.sc_name
);
4061 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, RPC_TASK_TIMEOUT
);
4062 dprintk("NFS reply setclientid: %d\n", status
);
4067 * nfs4_proc_setclientid_confirm - Confirm client ID
4068 * @clp: state data structure
4069 * @res: result of a previous SETCLIENTID
4070 * @cred: RPC credential to use for this call
4072 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4074 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
,
4075 struct nfs4_setclientid_res
*arg
,
4076 struct rpc_cred
*cred
)
4078 struct nfs_fsinfo fsinfo
;
4079 struct rpc_message msg
= {
4080 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
4082 .rpc_resp
= &fsinfo
,
4088 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4089 clp
->cl_rpcclient
->cl_auth
->au_ops
->au_name
,
4092 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, RPC_TASK_TIMEOUT
);
4094 spin_lock(&clp
->cl_lock
);
4095 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
4096 clp
->cl_last_renewal
= now
;
4097 spin_unlock(&clp
->cl_lock
);
4099 dprintk("NFS reply setclientid_confirm: %d\n", status
);
4103 struct nfs4_delegreturndata
{
4104 struct nfs4_delegreturnargs args
;
4105 struct nfs4_delegreturnres res
;
4107 nfs4_stateid stateid
;
4108 unsigned long timestamp
;
4109 struct nfs_fattr fattr
;
4113 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
4115 struct nfs4_delegreturndata
*data
= calldata
;
4117 if (!nfs4_sequence_done(task
, &data
->res
.seq_res
))
4120 switch (task
->tk_status
) {
4121 case -NFS4ERR_STALE_STATEID
:
4122 case -NFS4ERR_EXPIRED
:
4124 renew_lease(data
->res
.server
, data
->timestamp
);
4127 if (nfs4_async_handle_error(task
, data
->res
.server
, NULL
) ==
4129 rpc_restart_call_prepare(task
);
4133 data
->rpc_status
= task
->tk_status
;
4136 static void nfs4_delegreturn_release(void *calldata
)
4141 #if defined(CONFIG_NFS_V4_1)
4142 static void nfs4_delegreturn_prepare(struct rpc_task
*task
, void *data
)
4144 struct nfs4_delegreturndata
*d_data
;
4146 d_data
= (struct nfs4_delegreturndata
*)data
;
4148 if (nfs4_setup_sequence(d_data
->res
.server
,
4149 &d_data
->args
.seq_args
,
4150 &d_data
->res
.seq_res
, task
))
4152 rpc_call_start(task
);
4154 #endif /* CONFIG_NFS_V4_1 */
4156 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
4157 #if defined(CONFIG_NFS_V4_1)
4158 .rpc_call_prepare
= nfs4_delegreturn_prepare
,
4159 #endif /* CONFIG_NFS_V4_1 */
4160 .rpc_call_done
= nfs4_delegreturn_done
,
4161 .rpc_release
= nfs4_delegreturn_release
,
4164 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
4166 struct nfs4_delegreturndata
*data
;
4167 struct nfs_server
*server
= NFS_SERVER(inode
);
4168 struct rpc_task
*task
;
4169 struct rpc_message msg
= {
4170 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
4173 struct rpc_task_setup task_setup_data
= {
4174 .rpc_client
= server
->client
,
4175 .rpc_message
= &msg
,
4176 .callback_ops
= &nfs4_delegreturn_ops
,
4177 .flags
= RPC_TASK_ASYNC
,
4181 data
= kzalloc(sizeof(*data
), GFP_NOFS
);
4184 nfs41_init_sequence(&data
->args
.seq_args
, &data
->res
.seq_res
, 1);
4185 data
->args
.fhandle
= &data
->fh
;
4186 data
->args
.stateid
= &data
->stateid
;
4187 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
4188 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
4189 nfs4_stateid_copy(&data
->stateid
, stateid
);
4190 data
->res
.fattr
= &data
->fattr
;
4191 data
->res
.server
= server
;
4192 nfs_fattr_init(data
->res
.fattr
);
4193 data
->timestamp
= jiffies
;
4194 data
->rpc_status
= 0;
4196 task_setup_data
.callback_data
= data
;
4197 msg
.rpc_argp
= &data
->args
;
4198 msg
.rpc_resp
= &data
->res
;
4199 task
= rpc_run_task(&task_setup_data
);
4201 return PTR_ERR(task
);
4204 status
= nfs4_wait_for_completion_rpc_task(task
);
4207 status
= data
->rpc_status
;
4209 nfs_post_op_update_inode_force_wcc(inode
, &data
->fattr
);
4211 nfs_refresh_inode(inode
, &data
->fattr
);
4217 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
4219 struct nfs_server
*server
= NFS_SERVER(inode
);
4220 struct nfs4_exception exception
= { };
4223 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
, issync
);
4225 case -NFS4ERR_STALE_STATEID
:
4226 case -NFS4ERR_EXPIRED
:
4230 err
= nfs4_handle_exception(server
, err
, &exception
);
4231 } while (exception
.retry
);
4235 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4236 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4239 * sleep, with exponential backoff, and retry the LOCK operation.
4241 static unsigned long
4242 nfs4_set_lock_task_retry(unsigned long timeout
)
4244 freezable_schedule_timeout_killable(timeout
);
4246 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
4247 return NFS4_LOCK_MAXTIMEOUT
;
4251 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4253 struct inode
*inode
= state
->inode
;
4254 struct nfs_server
*server
= NFS_SERVER(inode
);
4255 struct nfs_client
*clp
= server
->nfs_client
;
4256 struct nfs_lockt_args arg
= {
4257 .fh
= NFS_FH(inode
),
4260 struct nfs_lockt_res res
= {
4263 struct rpc_message msg
= {
4264 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
4267 .rpc_cred
= state
->owner
->so_cred
,
4269 struct nfs4_lock_state
*lsp
;
4272 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
4273 status
= nfs4_set_lock_state(state
, request
);
4276 lsp
= request
->fl_u
.nfs4_fl
.owner
;
4277 arg
.lock_owner
.id
= lsp
->ls_seqid
.owner_id
;
4278 arg
.lock_owner
.s_dev
= server
->s_dev
;
4279 status
= nfs4_call_sync(server
->client
, server
, &msg
, &arg
.seq_args
, &res
.seq_res
, 1);
4282 request
->fl_type
= F_UNLCK
;
4284 case -NFS4ERR_DENIED
:
4287 request
->fl_ops
->fl_release_private(request
);
4292 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4294 struct nfs4_exception exception
= { };
4298 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
4299 _nfs4_proc_getlk(state
, cmd
, request
),
4301 } while (exception
.retry
);
4305 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
4308 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
4310 res
= posix_lock_file_wait(file
, fl
);
4313 res
= flock_lock_file_wait(file
, fl
);
4321 struct nfs4_unlockdata
{
4322 struct nfs_locku_args arg
;
4323 struct nfs_locku_res res
;
4324 struct nfs4_lock_state
*lsp
;
4325 struct nfs_open_context
*ctx
;
4326 struct file_lock fl
;
4327 const struct nfs_server
*server
;
4328 unsigned long timestamp
;
4331 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
4332 struct nfs_open_context
*ctx
,
4333 struct nfs4_lock_state
*lsp
,
4334 struct nfs_seqid
*seqid
)
4336 struct nfs4_unlockdata
*p
;
4337 struct inode
*inode
= lsp
->ls_state
->inode
;
4339 p
= kzalloc(sizeof(*p
), GFP_NOFS
);
4342 p
->arg
.fh
= NFS_FH(inode
);
4344 p
->arg
.seqid
= seqid
;
4345 p
->res
.seqid
= seqid
;
4346 p
->arg
.stateid
= &lsp
->ls_stateid
;
4348 atomic_inc(&lsp
->ls_count
);
4349 /* Ensure we don't close file until we're done freeing locks! */
4350 p
->ctx
= get_nfs_open_context(ctx
);
4351 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
4352 p
->server
= NFS_SERVER(inode
);
4356 static void nfs4_locku_release_calldata(void *data
)
4358 struct nfs4_unlockdata
*calldata
= data
;
4359 nfs_free_seqid(calldata
->arg
.seqid
);
4360 nfs4_put_lock_state(calldata
->lsp
);
4361 put_nfs_open_context(calldata
->ctx
);
4365 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
4367 struct nfs4_unlockdata
*calldata
= data
;
4369 if (!nfs4_sequence_done(task
, &calldata
->res
.seq_res
))
4371 switch (task
->tk_status
) {
4373 nfs4_stateid_copy(&calldata
->lsp
->ls_stateid
,
4374 &calldata
->res
.stateid
);
4375 renew_lease(calldata
->server
, calldata
->timestamp
);
4377 case -NFS4ERR_BAD_STATEID
:
4378 case -NFS4ERR_OLD_STATEID
:
4379 case -NFS4ERR_STALE_STATEID
:
4380 case -NFS4ERR_EXPIRED
:
4383 if (nfs4_async_handle_error(task
, calldata
->server
, NULL
) == -EAGAIN
)
4384 rpc_restart_call_prepare(task
);
4388 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
4390 struct nfs4_unlockdata
*calldata
= data
;
4392 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
4394 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
4395 /* Note: exit _without_ running nfs4_locku_done */
4396 task
->tk_action
= NULL
;
4399 calldata
->timestamp
= jiffies
;
4400 if (nfs4_setup_sequence(calldata
->server
,
4401 &calldata
->arg
.seq_args
,
4402 &calldata
->res
.seq_res
, task
))
4404 rpc_call_start(task
);
4407 static const struct rpc_call_ops nfs4_locku_ops
= {
4408 .rpc_call_prepare
= nfs4_locku_prepare
,
4409 .rpc_call_done
= nfs4_locku_done
,
4410 .rpc_release
= nfs4_locku_release_calldata
,
4413 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
4414 struct nfs_open_context
*ctx
,
4415 struct nfs4_lock_state
*lsp
,
4416 struct nfs_seqid
*seqid
)
4418 struct nfs4_unlockdata
*data
;
4419 struct rpc_message msg
= {
4420 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
4421 .rpc_cred
= ctx
->cred
,
4423 struct rpc_task_setup task_setup_data
= {
4424 .rpc_client
= NFS_CLIENT(lsp
->ls_state
->inode
),
4425 .rpc_message
= &msg
,
4426 .callback_ops
= &nfs4_locku_ops
,
4427 .workqueue
= nfsiod_workqueue
,
4428 .flags
= RPC_TASK_ASYNC
,
4431 /* Ensure this is an unlock - when canceling a lock, the
4432 * canceled lock is passed in, and it won't be an unlock.
4434 fl
->fl_type
= F_UNLCK
;
4436 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
4438 nfs_free_seqid(seqid
);
4439 return ERR_PTR(-ENOMEM
);
4442 nfs41_init_sequence(&data
->arg
.seq_args
, &data
->res
.seq_res
, 1);
4443 msg
.rpc_argp
= &data
->arg
;
4444 msg
.rpc_resp
= &data
->res
;
4445 task_setup_data
.callback_data
= data
;
4446 return rpc_run_task(&task_setup_data
);
4449 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4451 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
4452 struct nfs_seqid
*seqid
;
4453 struct nfs4_lock_state
*lsp
;
4454 struct rpc_task
*task
;
4456 unsigned char fl_flags
= request
->fl_flags
;
4458 status
= nfs4_set_lock_state(state
, request
);
4459 /* Unlock _before_ we do the RPC call */
4460 request
->fl_flags
|= FL_EXISTS
;
4461 down_read(&nfsi
->rwsem
);
4462 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
) {
4463 up_read(&nfsi
->rwsem
);
4466 up_read(&nfsi
->rwsem
);
4469 /* Is this a delegated lock? */
4470 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
4472 lsp
= request
->fl_u
.nfs4_fl
.owner
;
4473 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
, GFP_KERNEL
);
4477 task
= nfs4_do_unlck(request
, nfs_file_open_context(request
->fl_file
), lsp
, seqid
);
4478 status
= PTR_ERR(task
);
4481 status
= nfs4_wait_for_completion_rpc_task(task
);
4484 request
->fl_flags
= fl_flags
;
4488 struct nfs4_lockdata
{
4489 struct nfs_lock_args arg
;
4490 struct nfs_lock_res res
;
4491 struct nfs4_lock_state
*lsp
;
4492 struct nfs_open_context
*ctx
;
4493 struct file_lock fl
;
4494 unsigned long timestamp
;
4497 struct nfs_server
*server
;
4500 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
4501 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
,
4504 struct nfs4_lockdata
*p
;
4505 struct inode
*inode
= lsp
->ls_state
->inode
;
4506 struct nfs_server
*server
= NFS_SERVER(inode
);
4508 p
= kzalloc(sizeof(*p
), gfp_mask
);
4512 p
->arg
.fh
= NFS_FH(inode
);
4514 p
->arg
.open_seqid
= nfs_alloc_seqid(&lsp
->ls_state
->owner
->so_seqid
, gfp_mask
);
4515 if (p
->arg
.open_seqid
== NULL
)
4517 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
, gfp_mask
);
4518 if (p
->arg
.lock_seqid
== NULL
)
4519 goto out_free_seqid
;
4520 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
4521 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
4522 p
->arg
.lock_owner
.id
= lsp
->ls_seqid
.owner_id
;
4523 p
->arg
.lock_owner
.s_dev
= server
->s_dev
;
4524 p
->res
.lock_seqid
= p
->arg
.lock_seqid
;
4527 atomic_inc(&lsp
->ls_count
);
4528 p
->ctx
= get_nfs_open_context(ctx
);
4529 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
4532 nfs_free_seqid(p
->arg
.open_seqid
);
4538 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
4540 struct nfs4_lockdata
*data
= calldata
;
4541 struct nfs4_state
*state
= data
->lsp
->ls_state
;
4543 dprintk("%s: begin!\n", __func__
);
4544 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
4546 /* Do we need to do an open_to_lock_owner? */
4547 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
4548 if (nfs_wait_on_sequence(data
->arg
.open_seqid
, task
) != 0)
4550 data
->arg
.open_stateid
= &state
->stateid
;
4551 data
->arg
.new_lock_owner
= 1;
4552 data
->res
.open_seqid
= data
->arg
.open_seqid
;
4554 data
->arg
.new_lock_owner
= 0;
4555 data
->timestamp
= jiffies
;
4556 if (nfs4_setup_sequence(data
->server
,
4557 &data
->arg
.seq_args
,
4558 &data
->res
.seq_res
, task
))
4560 rpc_call_start(task
);
4561 dprintk("%s: done!, ret = %d\n", __func__
, data
->rpc_status
);
4564 static void nfs4_recover_lock_prepare(struct rpc_task
*task
, void *calldata
)
4566 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
4567 nfs4_lock_prepare(task
, calldata
);
4570 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
4572 struct nfs4_lockdata
*data
= calldata
;
4574 dprintk("%s: begin!\n", __func__
);
4576 if (!nfs4_sequence_done(task
, &data
->res
.seq_res
))
4579 data
->rpc_status
= task
->tk_status
;
4580 if (data
->arg
.new_lock_owner
!= 0) {
4581 if (data
->rpc_status
== 0)
4582 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
4586 if (data
->rpc_status
== 0) {
4587 nfs4_stateid_copy(&data
->lsp
->ls_stateid
, &data
->res
.stateid
);
4588 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
4589 renew_lease(NFS_SERVER(data
->ctx
->dentry
->d_inode
), data
->timestamp
);
4592 dprintk("%s: done, ret = %d!\n", __func__
, data
->rpc_status
);
4595 static void nfs4_lock_release(void *calldata
)
4597 struct nfs4_lockdata
*data
= calldata
;
4599 dprintk("%s: begin!\n", __func__
);
4600 nfs_free_seqid(data
->arg
.open_seqid
);
4601 if (data
->cancelled
!= 0) {
4602 struct rpc_task
*task
;
4603 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
4604 data
->arg
.lock_seqid
);
4606 rpc_put_task_async(task
);
4607 dprintk("%s: cancelling lock!\n", __func__
);
4609 nfs_free_seqid(data
->arg
.lock_seqid
);
4610 nfs4_put_lock_state(data
->lsp
);
4611 put_nfs_open_context(data
->ctx
);
4613 dprintk("%s: done!\n", __func__
);
4616 static const struct rpc_call_ops nfs4_lock_ops
= {
4617 .rpc_call_prepare
= nfs4_lock_prepare
,
4618 .rpc_call_done
= nfs4_lock_done
,
4619 .rpc_release
= nfs4_lock_release
,
4622 static const struct rpc_call_ops nfs4_recover_lock_ops
= {
4623 .rpc_call_prepare
= nfs4_recover_lock_prepare
,
4624 .rpc_call_done
= nfs4_lock_done
,
4625 .rpc_release
= nfs4_lock_release
,
4628 static void nfs4_handle_setlk_error(struct nfs_server
*server
, struct nfs4_lock_state
*lsp
, int new_lock_owner
, int error
)
4631 case -NFS4ERR_ADMIN_REVOKED
:
4632 case -NFS4ERR_BAD_STATEID
:
4633 lsp
->ls_seqid
.flags
&= ~NFS_SEQID_CONFIRMED
;
4634 if (new_lock_owner
!= 0 ||
4635 (lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) != 0)
4636 nfs4_schedule_stateid_recovery(server
, lsp
->ls_state
);
4638 case -NFS4ERR_STALE_STATEID
:
4639 lsp
->ls_seqid
.flags
&= ~NFS_SEQID_CONFIRMED
;
4640 case -NFS4ERR_EXPIRED
:
4641 nfs4_schedule_lease_recovery(server
->nfs_client
);
4645 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int recovery_type
)
4647 struct nfs4_lockdata
*data
;
4648 struct rpc_task
*task
;
4649 struct rpc_message msg
= {
4650 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
4651 .rpc_cred
= state
->owner
->so_cred
,
4653 struct rpc_task_setup task_setup_data
= {
4654 .rpc_client
= NFS_CLIENT(state
->inode
),
4655 .rpc_message
= &msg
,
4656 .callback_ops
= &nfs4_lock_ops
,
4657 .workqueue
= nfsiod_workqueue
,
4658 .flags
= RPC_TASK_ASYNC
,
4662 dprintk("%s: begin!\n", __func__
);
4663 data
= nfs4_alloc_lockdata(fl
, nfs_file_open_context(fl
->fl_file
),
4664 fl
->fl_u
.nfs4_fl
.owner
,
4665 recovery_type
== NFS_LOCK_NEW
? GFP_KERNEL
: GFP_NOFS
);
4669 data
->arg
.block
= 1;
4670 if (recovery_type
> NFS_LOCK_NEW
) {
4671 if (recovery_type
== NFS_LOCK_RECLAIM
)
4672 data
->arg
.reclaim
= NFS_LOCK_RECLAIM
;
4673 task_setup_data
.callback_ops
= &nfs4_recover_lock_ops
;
4675 nfs41_init_sequence(&data
->arg
.seq_args
, &data
->res
.seq_res
, 1);
4676 msg
.rpc_argp
= &data
->arg
;
4677 msg
.rpc_resp
= &data
->res
;
4678 task_setup_data
.callback_data
= data
;
4679 task
= rpc_run_task(&task_setup_data
);
4681 return PTR_ERR(task
);
4682 ret
= nfs4_wait_for_completion_rpc_task(task
);
4684 ret
= data
->rpc_status
;
4686 nfs4_handle_setlk_error(data
->server
, data
->lsp
,
4687 data
->arg
.new_lock_owner
, ret
);
4689 data
->cancelled
= 1;
4691 dprintk("%s: done, ret = %d!\n", __func__
, ret
);
4695 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
4697 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4698 struct nfs4_exception exception
= {
4699 .inode
= state
->inode
,
4704 /* Cache the lock if possible... */
4705 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
4707 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, NFS_LOCK_RECLAIM
);
4708 if (err
!= -NFS4ERR_DELAY
)
4710 nfs4_handle_exception(server
, err
, &exception
);
4711 } while (exception
.retry
);
4715 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
4717 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4718 struct nfs4_exception exception
= {
4719 .inode
= state
->inode
,
4723 err
= nfs4_set_lock_state(state
, request
);
4727 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
4729 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, NFS_LOCK_EXPIRED
);
4733 case -NFS4ERR_GRACE
:
4734 case -NFS4ERR_DELAY
:
4735 nfs4_handle_exception(server
, err
, &exception
);
4738 } while (exception
.retry
);
4743 #if defined(CONFIG_NFS_V4_1)
4745 * nfs41_check_expired_locks - possibly free a lock stateid
4747 * @state: NFSv4 state for an inode
4749 * Returns NFS_OK if recovery for this stateid is now finished.
4750 * Otherwise a negative NFS4ERR value is returned.
4752 static int nfs41_check_expired_locks(struct nfs4_state
*state
)
4754 int status
, ret
= -NFS4ERR_BAD_STATEID
;
4755 struct nfs4_lock_state
*lsp
;
4756 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4758 list_for_each_entry(lsp
, &state
->lock_states
, ls_locks
) {
4759 if (lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) {
4760 status
= nfs41_test_stateid(server
, &lsp
->ls_stateid
);
4761 if (status
!= NFS_OK
) {
4762 /* Free the stateid unless the server
4763 * informs us the stateid is unrecognized. */
4764 if (status
!= -NFS4ERR_BAD_STATEID
)
4765 nfs41_free_stateid(server
,
4767 lsp
->ls_flags
&= ~NFS_LOCK_INITIALIZED
;
4776 static int nfs41_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
4778 int status
= NFS_OK
;
4780 if (test_bit(LK_STATE_IN_USE
, &state
->flags
))
4781 status
= nfs41_check_expired_locks(state
);
4782 if (status
!= NFS_OK
)
4783 status
= nfs4_lock_expired(state
, request
);
4788 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4790 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
4791 unsigned char fl_flags
= request
->fl_flags
;
4792 int status
= -ENOLCK
;
4794 if ((fl_flags
& FL_POSIX
) &&
4795 !test_bit(NFS_STATE_POSIX_LOCKS
, &state
->flags
))
4797 /* Is this a delegated open? */
4798 status
= nfs4_set_lock_state(state
, request
);
4801 request
->fl_flags
|= FL_ACCESS
;
4802 status
= do_vfs_lock(request
->fl_file
, request
);
4805 down_read(&nfsi
->rwsem
);
4806 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
4807 /* Yes: cache locks! */
4808 /* ...but avoid races with delegation recall... */
4809 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
4810 status
= do_vfs_lock(request
->fl_file
, request
);
4813 status
= _nfs4_do_setlk(state
, cmd
, request
, NFS_LOCK_NEW
);
4816 /* Note: we always want to sleep here! */
4817 request
->fl_flags
= fl_flags
| FL_SLEEP
;
4818 if (do_vfs_lock(request
->fl_file
, request
) < 0)
4819 printk(KERN_WARNING
"NFS: %s: VFS is out of sync with lock "
4820 "manager!\n", __func__
);
4822 up_read(&nfsi
->rwsem
);
4824 request
->fl_flags
= fl_flags
;
4828 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4830 struct nfs4_exception exception
= {
4832 .inode
= state
->inode
,
4837 err
= _nfs4_proc_setlk(state
, cmd
, request
);
4838 if (err
== -NFS4ERR_DENIED
)
4840 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
4842 } while (exception
.retry
);
4847 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
4849 struct nfs_open_context
*ctx
;
4850 struct nfs4_state
*state
;
4851 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
4854 /* verify open state */
4855 ctx
= nfs_file_open_context(filp
);
4858 if (request
->fl_start
< 0 || request
->fl_end
< 0)
4861 if (IS_GETLK(cmd
)) {
4863 return nfs4_proc_getlk(state
, F_GETLK
, request
);
4867 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
4870 if (request
->fl_type
== F_UNLCK
) {
4872 return nfs4_proc_unlck(state
, cmd
, request
);
4879 * Don't rely on the VFS having checked the file open mode,
4880 * since it won't do this for flock() locks.
4882 switch (request
->fl_type
) {
4884 if (!(filp
->f_mode
& FMODE_READ
))
4888 if (!(filp
->f_mode
& FMODE_WRITE
))
4893 status
= nfs4_proc_setlk(state
, cmd
, request
);
4894 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
4896 timeout
= nfs4_set_lock_task_retry(timeout
);
4897 status
= -ERESTARTSYS
;
4900 } while(status
< 0);
4904 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
4906 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4907 struct nfs4_exception exception
= { };
4910 err
= nfs4_set_lock_state(state
, fl
);
4914 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, NFS_LOCK_NEW
);
4917 printk(KERN_ERR
"NFS: %s: unhandled error "
4918 "%d.\n", __func__
, err
);
4922 case -NFS4ERR_EXPIRED
:
4923 nfs4_schedule_stateid_recovery(server
, state
);
4924 case -NFS4ERR_STALE_CLIENTID
:
4925 case -NFS4ERR_STALE_STATEID
:
4926 nfs4_schedule_lease_recovery(server
->nfs_client
);
4928 case -NFS4ERR_BADSESSION
:
4929 case -NFS4ERR_BADSLOT
:
4930 case -NFS4ERR_BAD_HIGH_SLOT
:
4931 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
4932 case -NFS4ERR_DEADSESSION
:
4933 nfs4_schedule_session_recovery(server
->nfs_client
->cl_session
, err
);
4937 * The show must go on: exit, but mark the
4938 * stateid as needing recovery.
4940 case -NFS4ERR_DELEG_REVOKED
:
4941 case -NFS4ERR_ADMIN_REVOKED
:
4942 case -NFS4ERR_BAD_STATEID
:
4943 case -NFS4ERR_OPENMODE
:
4944 nfs4_schedule_stateid_recovery(server
, state
);
4949 * User RPCSEC_GSS context has expired.
4950 * We cannot recover this stateid now, so
4951 * skip it and allow recovery thread to
4957 case -NFS4ERR_DENIED
:
4958 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4961 case -NFS4ERR_DELAY
:
4964 err
= nfs4_handle_exception(server
, err
, &exception
);
4965 } while (exception
.retry
);
4970 struct nfs_release_lockowner_data
{
4971 struct nfs4_lock_state
*lsp
;
4972 struct nfs_server
*server
;
4973 struct nfs_release_lockowner_args args
;
4976 static void nfs4_release_lockowner_release(void *calldata
)
4978 struct nfs_release_lockowner_data
*data
= calldata
;
4979 nfs4_free_lock_state(data
->server
, data
->lsp
);
4983 static const struct rpc_call_ops nfs4_release_lockowner_ops
= {
4984 .rpc_release
= nfs4_release_lockowner_release
,
4987 int nfs4_release_lockowner(struct nfs4_lock_state
*lsp
)
4989 struct nfs_server
*server
= lsp
->ls_state
->owner
->so_server
;
4990 struct nfs_release_lockowner_data
*data
;
4991 struct rpc_message msg
= {
4992 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RELEASE_LOCKOWNER
],
4995 if (server
->nfs_client
->cl_mvops
->minor_version
!= 0)
4997 data
= kmalloc(sizeof(*data
), GFP_NOFS
);
5001 data
->server
= server
;
5002 data
->args
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
5003 data
->args
.lock_owner
.id
= lsp
->ls_seqid
.owner_id
;
5004 data
->args
.lock_owner
.s_dev
= server
->s_dev
;
5005 msg
.rpc_argp
= &data
->args
;
5006 rpc_call_async(server
->client
, &msg
, 0, &nfs4_release_lockowner_ops
, data
);
5010 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5012 static int nfs4_xattr_set_nfs4_acl(struct dentry
*dentry
, const char *key
,
5013 const void *buf
, size_t buflen
,
5014 int flags
, int type
)
5016 if (strcmp(key
, "") != 0)
5019 return nfs4_proc_set_acl(dentry
->d_inode
, buf
, buflen
);
5022 static int nfs4_xattr_get_nfs4_acl(struct dentry
*dentry
, const char *key
,
5023 void *buf
, size_t buflen
, int type
)
5025 if (strcmp(key
, "") != 0)
5028 return nfs4_proc_get_acl(dentry
->d_inode
, buf
, buflen
);
5031 static size_t nfs4_xattr_list_nfs4_acl(struct dentry
*dentry
, char *list
,
5032 size_t list_len
, const char *name
,
5033 size_t name_len
, int type
)
5035 size_t len
= sizeof(XATTR_NAME_NFSV4_ACL
);
5037 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
5040 if (list
&& len
<= list_len
)
5041 memcpy(list
, XATTR_NAME_NFSV4_ACL
, len
);
5046 * nfs_fhget will use either the mounted_on_fileid or the fileid
5048 static void nfs_fixup_referral_attributes(struct nfs_fattr
*fattr
)
5050 if (!(((fattr
->valid
& NFS_ATTR_FATTR_MOUNTED_ON_FILEID
) ||
5051 (fattr
->valid
& NFS_ATTR_FATTR_FILEID
)) &&
5052 (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
5053 (fattr
->valid
& NFS_ATTR_FATTR_V4_LOCATIONS
)))
5056 fattr
->valid
|= NFS_ATTR_FATTR_TYPE
| NFS_ATTR_FATTR_MODE
|
5057 NFS_ATTR_FATTR_NLINK
| NFS_ATTR_FATTR_V4_REFERRAL
;
5058 fattr
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
5062 static int _nfs4_proc_fs_locations(struct rpc_clnt
*client
, struct inode
*dir
,
5063 const struct qstr
*name
,
5064 struct nfs4_fs_locations
*fs_locations
,
5067 struct nfs_server
*server
= NFS_SERVER(dir
);
5069 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
5071 struct nfs4_fs_locations_arg args
= {
5072 .dir_fh
= NFS_FH(dir
),
5077 struct nfs4_fs_locations_res res
= {
5078 .fs_locations
= fs_locations
,
5080 struct rpc_message msg
= {
5081 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
5087 dprintk("%s: start\n", __func__
);
5089 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5090 * is not supported */
5091 if (NFS_SERVER(dir
)->attr_bitmask
[1] & FATTR4_WORD1_MOUNTED_ON_FILEID
)
5092 bitmask
[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID
;
5094 bitmask
[0] |= FATTR4_WORD0_FILEID
;
5096 nfs_fattr_init(&fs_locations
->fattr
);
5097 fs_locations
->server
= server
;
5098 fs_locations
->nlocations
= 0;
5099 status
= nfs4_call_sync(client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
5100 dprintk("%s: returned status = %d\n", __func__
, status
);
5104 int nfs4_proc_fs_locations(struct rpc_clnt
*client
, struct inode
*dir
,
5105 const struct qstr
*name
,
5106 struct nfs4_fs_locations
*fs_locations
,
5109 struct nfs4_exception exception
= { };
5112 err
= nfs4_handle_exception(NFS_SERVER(dir
),
5113 _nfs4_proc_fs_locations(client
, dir
, name
, fs_locations
, page
),
5115 } while (exception
.retry
);
5119 static int _nfs4_proc_secinfo(struct inode
*dir
, const struct qstr
*name
, struct nfs4_secinfo_flavors
*flavors
)
5122 struct nfs4_secinfo_arg args
= {
5123 .dir_fh
= NFS_FH(dir
),
5126 struct nfs4_secinfo_res res
= {
5129 struct rpc_message msg
= {
5130 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SECINFO
],
5135 dprintk("NFS call secinfo %s\n", name
->name
);
5136 status
= nfs4_call_sync(NFS_SERVER(dir
)->client
, NFS_SERVER(dir
), &msg
, &args
.seq_args
, &res
.seq_res
, 0);
5137 dprintk("NFS reply secinfo: %d\n", status
);
5141 int nfs4_proc_secinfo(struct inode
*dir
, const struct qstr
*name
,
5142 struct nfs4_secinfo_flavors
*flavors
)
5144 struct nfs4_exception exception
= { };
5147 err
= nfs4_handle_exception(NFS_SERVER(dir
),
5148 _nfs4_proc_secinfo(dir
, name
, flavors
),
5150 } while (exception
.retry
);
5154 #ifdef CONFIG_NFS_V4_1
5156 * Check the exchange flags returned by the server for invalid flags, having
5157 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5160 static int nfs4_check_cl_exchange_flags(u32 flags
)
5162 if (flags
& ~EXCHGID4_FLAG_MASK_R
)
5164 if ((flags
& EXCHGID4_FLAG_USE_PNFS_MDS
) &&
5165 (flags
& EXCHGID4_FLAG_USE_NON_PNFS
))
5167 if (!(flags
& (EXCHGID4_FLAG_MASK_PNFS
)))
5171 return -NFS4ERR_INVAL
;
5175 nfs41_same_server_scope(struct nfs41_server_scope
*a
,
5176 struct nfs41_server_scope
*b
)
5178 if (a
->server_scope_sz
== b
->server_scope_sz
&&
5179 memcmp(a
->server_scope
, b
->server_scope
, a
->server_scope_sz
) == 0)
5186 * nfs4_proc_bind_conn_to_session()
5188 * The 4.1 client currently uses the same TCP connection for the
5189 * fore and backchannel.
5191 int nfs4_proc_bind_conn_to_session(struct nfs_client
*clp
, struct rpc_cred
*cred
)
5194 struct nfs41_bind_conn_to_session_res res
;
5195 struct rpc_message msg
= {
5197 &nfs4_procedures
[NFSPROC4_CLNT_BIND_CONN_TO_SESSION
],
5203 dprintk("--> %s\n", __func__
);
5204 BUG_ON(clp
== NULL
);
5206 res
.session
= kzalloc(sizeof(struct nfs4_session
), GFP_NOFS
);
5207 if (unlikely(res
.session
== NULL
)) {
5212 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, RPC_TASK_TIMEOUT
);
5214 if (memcmp(res
.session
->sess_id
.data
,
5215 clp
->cl_session
->sess_id
.data
, NFS4_MAX_SESSIONID_LEN
)) {
5216 dprintk("NFS: %s: Session ID mismatch\n", __func__
);
5220 if (res
.dir
!= NFS4_CDFS4_BOTH
) {
5221 dprintk("NFS: %s: Unexpected direction from server\n",
5226 if (res
.use_conn_in_rdma_mode
) {
5227 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5236 dprintk("<-- %s status= %d\n", __func__
, status
);
5241 * nfs4_proc_exchange_id()
5243 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5245 * Since the clientid has expired, all compounds using sessions
5246 * associated with the stale clientid will be returning
5247 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5248 * be in some phase of session reset.
5250 int nfs4_proc_exchange_id(struct nfs_client
*clp
, struct rpc_cred
*cred
)
5252 nfs4_verifier verifier
;
5253 struct nfs41_exchange_id_args args
= {
5254 .verifier
= &verifier
,
5256 .flags
= EXCHGID4_FLAG_SUPP_MOVED_REFER
,
5258 struct nfs41_exchange_id_res res
= {
5262 struct rpc_message msg
= {
5263 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_EXCHANGE_ID
],
5269 nfs4_init_boot_verifier(clp
, &verifier
);
5270 args
.id_len
= scnprintf(args
.id
, sizeof(args
.id
),
5273 clp
->cl_rpcclient
->cl_nodename
);
5274 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5275 clp
->cl_rpcclient
->cl_auth
->au_ops
->au_name
,
5276 args
.id_len
, args
.id
);
5278 res
.server_owner
= kzalloc(sizeof(struct nfs41_server_owner
),
5280 if (unlikely(res
.server_owner
== NULL
)) {
5285 res
.server_scope
= kzalloc(sizeof(struct nfs41_server_scope
),
5287 if (unlikely(res
.server_scope
== NULL
)) {
5289 goto out_server_owner
;
5292 res
.impl_id
= kzalloc(sizeof(struct nfs41_impl_id
), GFP_NOFS
);
5293 if (unlikely(res
.impl_id
== NULL
)) {
5295 goto out_server_scope
;
5298 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, RPC_TASK_TIMEOUT
);
5300 status
= nfs4_check_cl_exchange_flags(res
.flags
);
5303 clp
->cl_clientid
= res
.clientid
;
5304 clp
->cl_exchange_flags
= (res
.flags
& ~EXCHGID4_FLAG_CONFIRMED_R
);
5305 if (!(res
.flags
& EXCHGID4_FLAG_CONFIRMED_R
))
5306 clp
->cl_seqid
= res
.seqid
;
5308 kfree(clp
->cl_serverowner
);
5309 clp
->cl_serverowner
= res
.server_owner
;
5310 res
.server_owner
= NULL
;
5312 /* use the most recent implementation id */
5313 kfree(clp
->cl_implid
);
5314 clp
->cl_implid
= res
.impl_id
;
5316 if (clp
->cl_serverscope
!= NULL
&&
5317 !nfs41_same_server_scope(clp
->cl_serverscope
,
5318 res
.server_scope
)) {
5319 dprintk("%s: server_scope mismatch detected\n",
5321 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH
, &clp
->cl_state
);
5322 kfree(clp
->cl_serverscope
);
5323 clp
->cl_serverscope
= NULL
;
5326 if (clp
->cl_serverscope
== NULL
) {
5327 clp
->cl_serverscope
= res
.server_scope
;
5334 kfree(res
.server_owner
);
5336 kfree(res
.server_scope
);
5338 if (clp
->cl_implid
!= NULL
)
5339 dprintk("NFS reply exchange_id: Server Implementation ID: "
5340 "domain: %s, name: %s, date: %llu,%u\n",
5341 clp
->cl_implid
->domain
, clp
->cl_implid
->name
,
5342 clp
->cl_implid
->date
.seconds
,
5343 clp
->cl_implid
->date
.nseconds
);
5344 dprintk("NFS reply exchange_id: %d\n", status
);
5348 static int _nfs4_proc_destroy_clientid(struct nfs_client
*clp
,
5349 struct rpc_cred
*cred
)
5351 struct rpc_message msg
= {
5352 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DESTROY_CLIENTID
],
5358 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, RPC_TASK_TIMEOUT
);
5360 dprintk("NFS: Got error %d from the server %s on "
5361 "DESTROY_CLIENTID.", status
, clp
->cl_hostname
);
5365 static int nfs4_proc_destroy_clientid(struct nfs_client
*clp
,
5366 struct rpc_cred
*cred
)
5371 for (loop
= NFS4_MAX_LOOP_ON_RECOVER
; loop
!= 0; loop
--) {
5372 ret
= _nfs4_proc_destroy_clientid(clp
, cred
);
5374 case -NFS4ERR_DELAY
:
5375 case -NFS4ERR_CLIENTID_BUSY
:
5385 int nfs4_destroy_clientid(struct nfs_client
*clp
)
5387 struct rpc_cred
*cred
;
5390 if (clp
->cl_mvops
->minor_version
< 1)
5392 if (clp
->cl_exchange_flags
== 0)
5394 cred
= nfs4_get_exchange_id_cred(clp
);
5395 ret
= nfs4_proc_destroy_clientid(clp
, cred
);
5400 case -NFS4ERR_STALE_CLIENTID
:
5401 clp
->cl_exchange_flags
= 0;
5407 struct nfs4_get_lease_time_data
{
5408 struct nfs4_get_lease_time_args
*args
;
5409 struct nfs4_get_lease_time_res
*res
;
5410 struct nfs_client
*clp
;
5413 static void nfs4_get_lease_time_prepare(struct rpc_task
*task
,
5417 struct nfs4_get_lease_time_data
*data
=
5418 (struct nfs4_get_lease_time_data
*)calldata
;
5420 dprintk("--> %s\n", __func__
);
5421 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
5422 /* just setup sequence, do not trigger session recovery
5423 since we're invoked within one */
5424 ret
= nfs41_setup_sequence(data
->clp
->cl_session
,
5425 &data
->args
->la_seq_args
,
5426 &data
->res
->lr_seq_res
, task
);
5428 BUG_ON(ret
== -EAGAIN
);
5429 rpc_call_start(task
);
5430 dprintk("<-- %s\n", __func__
);
5434 * Called from nfs4_state_manager thread for session setup, so don't recover
5435 * from sequence operation or clientid errors.
5437 static void nfs4_get_lease_time_done(struct rpc_task
*task
, void *calldata
)
5439 struct nfs4_get_lease_time_data
*data
=
5440 (struct nfs4_get_lease_time_data
*)calldata
;
5442 dprintk("--> %s\n", __func__
);
5443 if (!nfs41_sequence_done(task
, &data
->res
->lr_seq_res
))
5445 switch (task
->tk_status
) {
5446 case -NFS4ERR_DELAY
:
5447 case -NFS4ERR_GRACE
:
5448 dprintk("%s Retry: tk_status %d\n", __func__
, task
->tk_status
);
5449 rpc_delay(task
, NFS4_POLL_RETRY_MIN
);
5450 task
->tk_status
= 0;
5452 case -NFS4ERR_RETRY_UNCACHED_REP
:
5453 rpc_restart_call_prepare(task
);
5456 dprintk("<-- %s\n", __func__
);
5459 static const struct rpc_call_ops nfs4_get_lease_time_ops
= {
5460 .rpc_call_prepare
= nfs4_get_lease_time_prepare
,
5461 .rpc_call_done
= nfs4_get_lease_time_done
,
5464 int nfs4_proc_get_lease_time(struct nfs_client
*clp
, struct nfs_fsinfo
*fsinfo
)
5466 struct rpc_task
*task
;
5467 struct nfs4_get_lease_time_args args
;
5468 struct nfs4_get_lease_time_res res
= {
5469 .lr_fsinfo
= fsinfo
,
5471 struct nfs4_get_lease_time_data data
= {
5476 struct rpc_message msg
= {
5477 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GET_LEASE_TIME
],
5481 struct rpc_task_setup task_setup
= {
5482 .rpc_client
= clp
->cl_rpcclient
,
5483 .rpc_message
= &msg
,
5484 .callback_ops
= &nfs4_get_lease_time_ops
,
5485 .callback_data
= &data
,
5486 .flags
= RPC_TASK_TIMEOUT
,
5490 nfs41_init_sequence(&args
.la_seq_args
, &res
.lr_seq_res
, 0);
5491 dprintk("--> %s\n", __func__
);
5492 task
= rpc_run_task(&task_setup
);
5495 status
= PTR_ERR(task
);
5497 status
= task
->tk_status
;
5500 dprintk("<-- %s return %d\n", __func__
, status
);
5505 static struct nfs4_slot
*nfs4_alloc_slots(u32 max_slots
, gfp_t gfp_flags
)
5507 return kcalloc(max_slots
, sizeof(struct nfs4_slot
), gfp_flags
);
5510 static void nfs4_add_and_init_slots(struct nfs4_slot_table
*tbl
,
5511 struct nfs4_slot
*new,
5515 struct nfs4_slot
*old
= NULL
;
5518 spin_lock(&tbl
->slot_tbl_lock
);
5522 tbl
->max_slots
= max_slots
;
5524 tbl
->highest_used_slotid
= -1; /* no slot is currently used */
5525 for (i
= 0; i
< tbl
->max_slots
; i
++)
5526 tbl
->slots
[i
].seq_nr
= ivalue
;
5527 spin_unlock(&tbl
->slot_tbl_lock
);
5532 * (re)Initialise a slot table
5534 static int nfs4_realloc_slot_table(struct nfs4_slot_table
*tbl
, u32 max_reqs
,
5537 struct nfs4_slot
*new = NULL
;
5540 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__
,
5541 max_reqs
, tbl
->max_slots
);
5543 /* Does the newly negotiated max_reqs match the existing slot table? */
5544 if (max_reqs
!= tbl
->max_slots
) {
5545 new = nfs4_alloc_slots(max_reqs
, GFP_NOFS
);
5551 nfs4_add_and_init_slots(tbl
, new, max_reqs
, ivalue
);
5552 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__
,
5553 tbl
, tbl
->slots
, tbl
->max_slots
);
5555 dprintk("<-- %s: return %d\n", __func__
, ret
);
5559 /* Destroy the slot table */
5560 static void nfs4_destroy_slot_tables(struct nfs4_session
*session
)
5562 if (session
->fc_slot_table
.slots
!= NULL
) {
5563 kfree(session
->fc_slot_table
.slots
);
5564 session
->fc_slot_table
.slots
= NULL
;
5566 if (session
->bc_slot_table
.slots
!= NULL
) {
5567 kfree(session
->bc_slot_table
.slots
);
5568 session
->bc_slot_table
.slots
= NULL
;
5574 * Initialize or reset the forechannel and backchannel tables
5576 static int nfs4_setup_session_slot_tables(struct nfs4_session
*ses
)
5578 struct nfs4_slot_table
*tbl
;
5581 dprintk("--> %s\n", __func__
);
5583 tbl
= &ses
->fc_slot_table
;
5584 status
= nfs4_realloc_slot_table(tbl
, ses
->fc_attrs
.max_reqs
, 1);
5585 if (status
) /* -ENOMEM */
5588 tbl
= &ses
->bc_slot_table
;
5589 status
= nfs4_realloc_slot_table(tbl
, ses
->bc_attrs
.max_reqs
, 0);
5590 if (status
&& tbl
->slots
== NULL
)
5591 /* Fore and back channel share a connection so get
5592 * both slot tables or neither */
5593 nfs4_destroy_slot_tables(ses
);
5597 struct nfs4_session
*nfs4_alloc_session(struct nfs_client
*clp
)
5599 struct nfs4_session
*session
;
5600 struct nfs4_slot_table
*tbl
;
5602 session
= kzalloc(sizeof(struct nfs4_session
), GFP_NOFS
);
5606 tbl
= &session
->fc_slot_table
;
5607 tbl
->highest_used_slotid
= NFS4_NO_SLOT
;
5608 spin_lock_init(&tbl
->slot_tbl_lock
);
5609 rpc_init_priority_wait_queue(&tbl
->slot_tbl_waitq
, "ForeChannel Slot table");
5610 init_completion(&tbl
->complete
);
5612 tbl
= &session
->bc_slot_table
;
5613 tbl
->highest_used_slotid
= NFS4_NO_SLOT
;
5614 spin_lock_init(&tbl
->slot_tbl_lock
);
5615 rpc_init_wait_queue(&tbl
->slot_tbl_waitq
, "BackChannel Slot table");
5616 init_completion(&tbl
->complete
);
5618 session
->session_state
= 1<<NFS4_SESSION_INITING
;
5624 void nfs4_destroy_session(struct nfs4_session
*session
)
5626 struct rpc_xprt
*xprt
;
5627 struct rpc_cred
*cred
;
5629 cred
= nfs4_get_exchange_id_cred(session
->clp
);
5630 nfs4_proc_destroy_session(session
, cred
);
5635 xprt
= rcu_dereference(session
->clp
->cl_rpcclient
->cl_xprt
);
5637 dprintk("%s Destroy backchannel for xprt %p\n",
5639 xprt_destroy_backchannel(xprt
, NFS41_BC_MIN_CALLBACKS
);
5640 nfs4_destroy_slot_tables(session
);
5645 * Initialize the values to be used by the client in CREATE_SESSION
5646 * If nfs4_init_session set the fore channel request and response sizes,
5649 * Set the back channel max_resp_sz_cached to zero to force the client to
5650 * always set csa_cachethis to FALSE because the current implementation
5651 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5653 static void nfs4_init_channel_attrs(struct nfs41_create_session_args
*args
)
5655 struct nfs4_session
*session
= args
->client
->cl_session
;
5656 unsigned int mxrqst_sz
= session
->fc_attrs
.max_rqst_sz
,
5657 mxresp_sz
= session
->fc_attrs
.max_resp_sz
;
5660 mxrqst_sz
= NFS_MAX_FILE_IO_SIZE
;
5662 mxresp_sz
= NFS_MAX_FILE_IO_SIZE
;
5663 /* Fore channel attributes */
5664 args
->fc_attrs
.max_rqst_sz
= mxrqst_sz
;
5665 args
->fc_attrs
.max_resp_sz
= mxresp_sz
;
5666 args
->fc_attrs
.max_ops
= NFS4_MAX_OPS
;
5667 args
->fc_attrs
.max_reqs
= max_session_slots
;
5669 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5670 "max_ops=%u max_reqs=%u\n",
5672 args
->fc_attrs
.max_rqst_sz
, args
->fc_attrs
.max_resp_sz
,
5673 args
->fc_attrs
.max_ops
, args
->fc_attrs
.max_reqs
);
5675 /* Back channel attributes */
5676 args
->bc_attrs
.max_rqst_sz
= PAGE_SIZE
;
5677 args
->bc_attrs
.max_resp_sz
= PAGE_SIZE
;
5678 args
->bc_attrs
.max_resp_sz_cached
= 0;
5679 args
->bc_attrs
.max_ops
= NFS4_MAX_BACK_CHANNEL_OPS
;
5680 args
->bc_attrs
.max_reqs
= 1;
5682 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5683 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5685 args
->bc_attrs
.max_rqst_sz
, args
->bc_attrs
.max_resp_sz
,
5686 args
->bc_attrs
.max_resp_sz_cached
, args
->bc_attrs
.max_ops
,
5687 args
->bc_attrs
.max_reqs
);
5690 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args
*args
, struct nfs4_session
*session
)
5692 struct nfs4_channel_attrs
*sent
= &args
->fc_attrs
;
5693 struct nfs4_channel_attrs
*rcvd
= &session
->fc_attrs
;
5695 if (rcvd
->max_resp_sz
> sent
->max_resp_sz
)
5698 * Our requested max_ops is the minimum we need; we're not
5699 * prepared to break up compounds into smaller pieces than that.
5700 * So, no point even trying to continue if the server won't
5703 if (rcvd
->max_ops
< sent
->max_ops
)
5705 if (rcvd
->max_reqs
== 0)
5707 if (rcvd
->max_reqs
> NFS4_MAX_SLOT_TABLE
)
5708 rcvd
->max_reqs
= NFS4_MAX_SLOT_TABLE
;
5712 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args
*args
, struct nfs4_session
*session
)
5714 struct nfs4_channel_attrs
*sent
= &args
->bc_attrs
;
5715 struct nfs4_channel_attrs
*rcvd
= &session
->bc_attrs
;
5717 if (rcvd
->max_rqst_sz
> sent
->max_rqst_sz
)
5719 if (rcvd
->max_resp_sz
< sent
->max_resp_sz
)
5721 if (rcvd
->max_resp_sz_cached
> sent
->max_resp_sz_cached
)
5723 /* These would render the backchannel useless: */
5724 if (rcvd
->max_ops
!= sent
->max_ops
)
5726 if (rcvd
->max_reqs
!= sent
->max_reqs
)
5731 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args
*args
,
5732 struct nfs4_session
*session
)
5736 ret
= nfs4_verify_fore_channel_attrs(args
, session
);
5739 return nfs4_verify_back_channel_attrs(args
, session
);
5742 static int _nfs4_proc_create_session(struct nfs_client
*clp
,
5743 struct rpc_cred
*cred
)
5745 struct nfs4_session
*session
= clp
->cl_session
;
5746 struct nfs41_create_session_args args
= {
5748 .cb_program
= NFS4_CALLBACK
,
5750 struct nfs41_create_session_res res
= {
5753 struct rpc_message msg
= {
5754 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE_SESSION
],
5761 nfs4_init_channel_attrs(&args
);
5762 args
.flags
= (SESSION4_PERSIST
| SESSION4_BACK_CHAN
);
5764 status
= rpc_call_sync(session
->clp
->cl_rpcclient
, &msg
, RPC_TASK_TIMEOUT
);
5767 /* Verify the session's negotiated channel_attrs values */
5768 status
= nfs4_verify_channel_attrs(&args
, session
);
5770 /* Increment the clientid slot sequence id */
5778 * Issues a CREATE_SESSION operation to the server.
5779 * It is the responsibility of the caller to verify the session is
5780 * expired before calling this routine.
5782 int nfs4_proc_create_session(struct nfs_client
*clp
, struct rpc_cred
*cred
)
5786 struct nfs4_session
*session
= clp
->cl_session
;
5788 dprintk("--> %s clp=%p session=%p\n", __func__
, clp
, session
);
5790 status
= _nfs4_proc_create_session(clp
, cred
);
5794 /* Init or reset the session slot tables */
5795 status
= nfs4_setup_session_slot_tables(session
);
5796 dprintk("slot table setup returned %d\n", status
);
5800 ptr
= (unsigned *)&session
->sess_id
.data
[0];
5801 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__
,
5802 clp
->cl_seqid
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
5804 dprintk("<-- %s\n", __func__
);
5809 * Issue the over-the-wire RPC DESTROY_SESSION.
5810 * The caller must serialize access to this routine.
5812 int nfs4_proc_destroy_session(struct nfs4_session
*session
,
5813 struct rpc_cred
*cred
)
5815 struct rpc_message msg
= {
5816 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DESTROY_SESSION
],
5817 .rpc_argp
= session
,
5822 dprintk("--> nfs4_proc_destroy_session\n");
5824 /* session is still being setup */
5825 if (session
->clp
->cl_cons_state
!= NFS_CS_READY
)
5828 status
= rpc_call_sync(session
->clp
->cl_rpcclient
, &msg
, RPC_TASK_TIMEOUT
);
5831 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
5832 "Session has been destroyed regardless...\n", status
);
5834 dprintk("<-- nfs4_proc_destroy_session\n");
5839 * With sessions, the client is not marked ready until after a
5840 * successful EXCHANGE_ID and CREATE_SESSION.
5842 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
5843 * other versions of NFS can be tried.
5845 static int nfs41_check_session_ready(struct nfs_client
*clp
)
5849 if (clp
->cl_cons_state
== NFS_CS_SESSION_INITING
) {
5850 ret
= nfs4_client_recover_expired_lease(clp
);
5854 if (clp
->cl_cons_state
< NFS_CS_READY
)
5855 return -EPROTONOSUPPORT
;
5860 int nfs4_init_session(struct nfs_server
*server
)
5862 struct nfs_client
*clp
= server
->nfs_client
;
5863 struct nfs4_session
*session
;
5864 unsigned int rsize
, wsize
;
5866 if (!nfs4_has_session(clp
))
5869 session
= clp
->cl_session
;
5870 spin_lock(&clp
->cl_lock
);
5871 if (test_and_clear_bit(NFS4_SESSION_INITING
, &session
->session_state
)) {
5873 rsize
= server
->rsize
;
5875 rsize
= NFS_MAX_FILE_IO_SIZE
;
5876 wsize
= server
->wsize
;
5878 wsize
= NFS_MAX_FILE_IO_SIZE
;
5880 session
->fc_attrs
.max_rqst_sz
= wsize
+ nfs41_maxwrite_overhead
;
5881 session
->fc_attrs
.max_resp_sz
= rsize
+ nfs41_maxread_overhead
;
5883 spin_unlock(&clp
->cl_lock
);
5885 return nfs41_check_session_ready(clp
);
5888 int nfs4_init_ds_session(struct nfs_client
*clp
, unsigned long lease_time
)
5890 struct nfs4_session
*session
= clp
->cl_session
;
5893 spin_lock(&clp
->cl_lock
);
5894 if (test_and_clear_bit(NFS4_SESSION_INITING
, &session
->session_state
)) {
5896 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
5897 * DS lease to be equal to the MDS lease.
5899 clp
->cl_lease_time
= lease_time
;
5900 clp
->cl_last_renewal
= jiffies
;
5902 spin_unlock(&clp
->cl_lock
);
5904 ret
= nfs41_check_session_ready(clp
);
5907 /* Test for the DS role */
5908 if (!is_ds_client(clp
))
5912 EXPORT_SYMBOL_GPL(nfs4_init_ds_session
);
5916 * Renew the cl_session lease.
5918 struct nfs4_sequence_data
{
5919 struct nfs_client
*clp
;
5920 struct nfs4_sequence_args args
;
5921 struct nfs4_sequence_res res
;
5924 static void nfs41_sequence_release(void *data
)
5926 struct nfs4_sequence_data
*calldata
= data
;
5927 struct nfs_client
*clp
= calldata
->clp
;
5929 if (atomic_read(&clp
->cl_count
) > 1)
5930 nfs4_schedule_state_renewal(clp
);
5931 nfs_put_client(clp
);
5935 static int nfs41_sequence_handle_errors(struct rpc_task
*task
, struct nfs_client
*clp
)
5937 switch(task
->tk_status
) {
5938 case -NFS4ERR_DELAY
:
5939 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
5942 nfs4_schedule_lease_recovery(clp
);
5947 static void nfs41_sequence_call_done(struct rpc_task
*task
, void *data
)
5949 struct nfs4_sequence_data
*calldata
= data
;
5950 struct nfs_client
*clp
= calldata
->clp
;
5952 if (!nfs41_sequence_done(task
, task
->tk_msg
.rpc_resp
))
5955 if (task
->tk_status
< 0) {
5956 dprintk("%s ERROR %d\n", __func__
, task
->tk_status
);
5957 if (atomic_read(&clp
->cl_count
) == 1)
5960 if (nfs41_sequence_handle_errors(task
, clp
) == -EAGAIN
) {
5961 rpc_restart_call_prepare(task
);
5965 dprintk("%s rpc_cred %p\n", __func__
, task
->tk_msg
.rpc_cred
);
5967 dprintk("<-- %s\n", __func__
);
5970 static void nfs41_sequence_prepare(struct rpc_task
*task
, void *data
)
5972 struct nfs4_sequence_data
*calldata
= data
;
5973 struct nfs_client
*clp
= calldata
->clp
;
5974 struct nfs4_sequence_args
*args
;
5975 struct nfs4_sequence_res
*res
;
5977 args
= task
->tk_msg
.rpc_argp
;
5978 res
= task
->tk_msg
.rpc_resp
;
5980 if (nfs41_setup_sequence(clp
->cl_session
, args
, res
, task
))
5982 rpc_call_start(task
);
5985 static const struct rpc_call_ops nfs41_sequence_ops
= {
5986 .rpc_call_done
= nfs41_sequence_call_done
,
5987 .rpc_call_prepare
= nfs41_sequence_prepare
,
5988 .rpc_release
= nfs41_sequence_release
,
5991 static struct rpc_task
*_nfs41_proc_sequence(struct nfs_client
*clp
, struct rpc_cred
*cred
)
5993 struct nfs4_sequence_data
*calldata
;
5994 struct rpc_message msg
= {
5995 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SEQUENCE
],
5998 struct rpc_task_setup task_setup_data
= {
5999 .rpc_client
= clp
->cl_rpcclient
,
6000 .rpc_message
= &msg
,
6001 .callback_ops
= &nfs41_sequence_ops
,
6002 .flags
= RPC_TASK_ASYNC
| RPC_TASK_SOFT
,
6005 if (!atomic_inc_not_zero(&clp
->cl_count
))
6006 return ERR_PTR(-EIO
);
6007 calldata
= kzalloc(sizeof(*calldata
), GFP_NOFS
);
6008 if (calldata
== NULL
) {
6009 nfs_put_client(clp
);
6010 return ERR_PTR(-ENOMEM
);
6012 nfs41_init_sequence(&calldata
->args
, &calldata
->res
, 0);
6013 msg
.rpc_argp
= &calldata
->args
;
6014 msg
.rpc_resp
= &calldata
->res
;
6015 calldata
->clp
= clp
;
6016 task_setup_data
.callback_data
= calldata
;
6018 return rpc_run_task(&task_setup_data
);
6021 static int nfs41_proc_async_sequence(struct nfs_client
*clp
, struct rpc_cred
*cred
, unsigned renew_flags
)
6023 struct rpc_task
*task
;
6026 if ((renew_flags
& NFS4_RENEW_TIMEOUT
) == 0)
6028 task
= _nfs41_proc_sequence(clp
, cred
);
6030 ret
= PTR_ERR(task
);
6032 rpc_put_task_async(task
);
6033 dprintk("<-- %s status=%d\n", __func__
, ret
);
6037 static int nfs4_proc_sequence(struct nfs_client
*clp
, struct rpc_cred
*cred
)
6039 struct rpc_task
*task
;
6042 task
= _nfs41_proc_sequence(clp
, cred
);
6044 ret
= PTR_ERR(task
);
6047 ret
= rpc_wait_for_completion_task(task
);
6049 struct nfs4_sequence_res
*res
= task
->tk_msg
.rpc_resp
;
6051 if (task
->tk_status
== 0)
6052 nfs41_handle_sequence_flag_errors(clp
, res
->sr_status_flags
);
6053 ret
= task
->tk_status
;
6057 dprintk("<-- %s status=%d\n", __func__
, ret
);
6061 struct nfs4_reclaim_complete_data
{
6062 struct nfs_client
*clp
;
6063 struct nfs41_reclaim_complete_args arg
;
6064 struct nfs41_reclaim_complete_res res
;
6067 static void nfs4_reclaim_complete_prepare(struct rpc_task
*task
, void *data
)
6069 struct nfs4_reclaim_complete_data
*calldata
= data
;
6071 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
6072 if (nfs41_setup_sequence(calldata
->clp
->cl_session
,
6073 &calldata
->arg
.seq_args
,
6074 &calldata
->res
.seq_res
, task
))
6077 rpc_call_start(task
);
6080 static int nfs41_reclaim_complete_handle_errors(struct rpc_task
*task
, struct nfs_client
*clp
)
6082 switch(task
->tk_status
) {
6084 case -NFS4ERR_COMPLETE_ALREADY
:
6085 case -NFS4ERR_WRONG_CRED
: /* What to do here? */
6087 case -NFS4ERR_DELAY
:
6088 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
6090 case -NFS4ERR_RETRY_UNCACHED_REP
:
6093 nfs4_schedule_lease_recovery(clp
);
6098 static void nfs4_reclaim_complete_done(struct rpc_task
*task
, void *data
)
6100 struct nfs4_reclaim_complete_data
*calldata
= data
;
6101 struct nfs_client
*clp
= calldata
->clp
;
6102 struct nfs4_sequence_res
*res
= &calldata
->res
.seq_res
;
6104 dprintk("--> %s\n", __func__
);
6105 if (!nfs41_sequence_done(task
, res
))
6108 if (nfs41_reclaim_complete_handle_errors(task
, clp
) == -EAGAIN
) {
6109 rpc_restart_call_prepare(task
);
6112 dprintk("<-- %s\n", __func__
);
6115 static void nfs4_free_reclaim_complete_data(void *data
)
6117 struct nfs4_reclaim_complete_data
*calldata
= data
;
6122 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops
= {
6123 .rpc_call_prepare
= nfs4_reclaim_complete_prepare
,
6124 .rpc_call_done
= nfs4_reclaim_complete_done
,
6125 .rpc_release
= nfs4_free_reclaim_complete_data
,
6129 * Issue a global reclaim complete.
6131 static int nfs41_proc_reclaim_complete(struct nfs_client
*clp
)
6133 struct nfs4_reclaim_complete_data
*calldata
;
6134 struct rpc_task
*task
;
6135 struct rpc_message msg
= {
6136 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RECLAIM_COMPLETE
],
6138 struct rpc_task_setup task_setup_data
= {
6139 .rpc_client
= clp
->cl_rpcclient
,
6140 .rpc_message
= &msg
,
6141 .callback_ops
= &nfs4_reclaim_complete_call_ops
,
6142 .flags
= RPC_TASK_ASYNC
,
6144 int status
= -ENOMEM
;
6146 dprintk("--> %s\n", __func__
);
6147 calldata
= kzalloc(sizeof(*calldata
), GFP_NOFS
);
6148 if (calldata
== NULL
)
6150 calldata
->clp
= clp
;
6151 calldata
->arg
.one_fs
= 0;
6153 nfs41_init_sequence(&calldata
->arg
.seq_args
, &calldata
->res
.seq_res
, 0);
6154 msg
.rpc_argp
= &calldata
->arg
;
6155 msg
.rpc_resp
= &calldata
->res
;
6156 task_setup_data
.callback_data
= calldata
;
6157 task
= rpc_run_task(&task_setup_data
);
6159 status
= PTR_ERR(task
);
6162 status
= nfs4_wait_for_completion_rpc_task(task
);
6164 status
= task
->tk_status
;
6168 dprintk("<-- %s status=%d\n", __func__
, status
);
6173 nfs4_layoutget_prepare(struct rpc_task
*task
, void *calldata
)
6175 struct nfs4_layoutget
*lgp
= calldata
;
6176 struct nfs_server
*server
= NFS_SERVER(lgp
->args
.inode
);
6178 dprintk("--> %s\n", __func__
);
6179 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6180 * right now covering the LAYOUTGET we are about to send.
6181 * However, that is not so catastrophic, and there seems
6182 * to be no way to prevent it completely.
6184 if (nfs4_setup_sequence(server
, &lgp
->args
.seq_args
,
6185 &lgp
->res
.seq_res
, task
))
6187 if (pnfs_choose_layoutget_stateid(&lgp
->args
.stateid
,
6188 NFS_I(lgp
->args
.inode
)->layout
,
6189 lgp
->args
.ctx
->state
)) {
6190 rpc_exit(task
, NFS4_OK
);
6193 rpc_call_start(task
);
6196 static void nfs4_layoutget_done(struct rpc_task
*task
, void *calldata
)
6198 struct nfs4_layoutget
*lgp
= calldata
;
6199 struct nfs_server
*server
= NFS_SERVER(lgp
->args
.inode
);
6201 dprintk("--> %s\n", __func__
);
6203 if (!nfs4_sequence_done(task
, &lgp
->res
.seq_res
))
6206 switch (task
->tk_status
) {
6209 case -NFS4ERR_LAYOUTTRYLATER
:
6210 case -NFS4ERR_RECALLCONFLICT
:
6211 task
->tk_status
= -NFS4ERR_DELAY
;
6214 if (nfs4_async_handle_error(task
, server
, NULL
) == -EAGAIN
) {
6215 rpc_restart_call_prepare(task
);
6219 dprintk("<-- %s\n", __func__
);
6222 static size_t max_response_pages(struct nfs_server
*server
)
6224 u32 max_resp_sz
= server
->nfs_client
->cl_session
->fc_attrs
.max_resp_sz
;
6225 return nfs_page_array_len(0, max_resp_sz
);
6228 static void nfs4_free_pages(struct page
**pages
, size_t size
)
6235 for (i
= 0; i
< size
; i
++) {
6238 __free_page(pages
[i
]);
6243 static struct page
**nfs4_alloc_pages(size_t size
, gfp_t gfp_flags
)
6245 struct page
**pages
;
6248 pages
= kcalloc(size
, sizeof(struct page
*), gfp_flags
);
6250 dprintk("%s: can't alloc array of %zu pages\n", __func__
, size
);
6254 for (i
= 0; i
< size
; i
++) {
6255 pages
[i
] = alloc_page(gfp_flags
);
6257 dprintk("%s: failed to allocate page\n", __func__
);
6258 nfs4_free_pages(pages
, size
);
6266 static void nfs4_layoutget_release(void *calldata
)
6268 struct nfs4_layoutget
*lgp
= calldata
;
6269 struct nfs_server
*server
= NFS_SERVER(lgp
->args
.inode
);
6270 size_t max_pages
= max_response_pages(server
);
6272 dprintk("--> %s\n", __func__
);
6273 nfs4_free_pages(lgp
->args
.layout
.pages
, max_pages
);
6274 put_nfs_open_context(lgp
->args
.ctx
);
6276 dprintk("<-- %s\n", __func__
);
6279 static const struct rpc_call_ops nfs4_layoutget_call_ops
= {
6280 .rpc_call_prepare
= nfs4_layoutget_prepare
,
6281 .rpc_call_done
= nfs4_layoutget_done
,
6282 .rpc_release
= nfs4_layoutget_release
,
6285 void nfs4_proc_layoutget(struct nfs4_layoutget
*lgp
, gfp_t gfp_flags
)
6287 struct nfs_server
*server
= NFS_SERVER(lgp
->args
.inode
);
6288 size_t max_pages
= max_response_pages(server
);
6289 struct rpc_task
*task
;
6290 struct rpc_message msg
= {
6291 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LAYOUTGET
],
6292 .rpc_argp
= &lgp
->args
,
6293 .rpc_resp
= &lgp
->res
,
6295 struct rpc_task_setup task_setup_data
= {
6296 .rpc_client
= server
->client
,
6297 .rpc_message
= &msg
,
6298 .callback_ops
= &nfs4_layoutget_call_ops
,
6299 .callback_data
= lgp
,
6300 .flags
= RPC_TASK_ASYNC
,
6304 dprintk("--> %s\n", __func__
);
6306 lgp
->args
.layout
.pages
= nfs4_alloc_pages(max_pages
, gfp_flags
);
6307 if (!lgp
->args
.layout
.pages
) {
6308 nfs4_layoutget_release(lgp
);
6311 lgp
->args
.layout
.pglen
= max_pages
* PAGE_SIZE
;
6313 lgp
->res
.layoutp
= &lgp
->args
.layout
;
6314 lgp
->res
.seq_res
.sr_slot
= NULL
;
6315 nfs41_init_sequence(&lgp
->args
.seq_args
, &lgp
->res
.seq_res
, 0);
6316 task
= rpc_run_task(&task_setup_data
);
6319 status
= nfs4_wait_for_completion_rpc_task(task
);
6321 status
= task
->tk_status
;
6323 status
= pnfs_layout_process(lgp
);
6325 dprintk("<-- %s status=%d\n", __func__
, status
);
6330 nfs4_layoutreturn_prepare(struct rpc_task
*task
, void *calldata
)
6332 struct nfs4_layoutreturn
*lrp
= calldata
;
6334 dprintk("--> %s\n", __func__
);
6335 if (nfs41_setup_sequence(lrp
->clp
->cl_session
, &lrp
->args
.seq_args
,
6336 &lrp
->res
.seq_res
, task
))
6338 rpc_call_start(task
);
6341 static void nfs4_layoutreturn_done(struct rpc_task
*task
, void *calldata
)
6343 struct nfs4_layoutreturn
*lrp
= calldata
;
6344 struct nfs_server
*server
;
6345 struct pnfs_layout_hdr
*lo
= lrp
->args
.layout
;
6347 dprintk("--> %s\n", __func__
);
6349 if (!nfs4_sequence_done(task
, &lrp
->res
.seq_res
))
6352 server
= NFS_SERVER(lrp
->args
.inode
);
6353 if (nfs4_async_handle_error(task
, server
, NULL
) == -EAGAIN
) {
6354 rpc_restart_call_prepare(task
);
6357 spin_lock(&lo
->plh_inode
->i_lock
);
6358 if (task
->tk_status
== 0 && lrp
->res
.lrs_present
)
6359 pnfs_set_layout_stateid(lo
, &lrp
->res
.stateid
, true);
6360 lo
->plh_block_lgets
--;
6361 spin_unlock(&lo
->plh_inode
->i_lock
);
6362 dprintk("<-- %s\n", __func__
);
6365 static void nfs4_layoutreturn_release(void *calldata
)
6367 struct nfs4_layoutreturn
*lrp
= calldata
;
6369 dprintk("--> %s\n", __func__
);
6370 put_layout_hdr(lrp
->args
.layout
);
6372 dprintk("<-- %s\n", __func__
);
6375 static const struct rpc_call_ops nfs4_layoutreturn_call_ops
= {
6376 .rpc_call_prepare
= nfs4_layoutreturn_prepare
,
6377 .rpc_call_done
= nfs4_layoutreturn_done
,
6378 .rpc_release
= nfs4_layoutreturn_release
,
6381 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn
*lrp
)
6383 struct rpc_task
*task
;
6384 struct rpc_message msg
= {
6385 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LAYOUTRETURN
],
6386 .rpc_argp
= &lrp
->args
,
6387 .rpc_resp
= &lrp
->res
,
6389 struct rpc_task_setup task_setup_data
= {
6390 .rpc_client
= lrp
->clp
->cl_rpcclient
,
6391 .rpc_message
= &msg
,
6392 .callback_ops
= &nfs4_layoutreturn_call_ops
,
6393 .callback_data
= lrp
,
6397 dprintk("--> %s\n", __func__
);
6398 nfs41_init_sequence(&lrp
->args
.seq_args
, &lrp
->res
.seq_res
, 1);
6399 task
= rpc_run_task(&task_setup_data
);
6401 return PTR_ERR(task
);
6402 status
= task
->tk_status
;
6403 dprintk("<-- %s status=%d\n", __func__
, status
);
6409 * Retrieve the list of Data Server devices from the MDS.
6411 static int _nfs4_getdevicelist(struct nfs_server
*server
,
6412 const struct nfs_fh
*fh
,
6413 struct pnfs_devicelist
*devlist
)
6415 struct nfs4_getdevicelist_args args
= {
6417 .layoutclass
= server
->pnfs_curr_ld
->id
,
6419 struct nfs4_getdevicelist_res res
= {
6422 struct rpc_message msg
= {
6423 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETDEVICELIST
],
6429 dprintk("--> %s\n", __func__
);
6430 status
= nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
,
6432 dprintk("<-- %s status=%d\n", __func__
, status
);
6436 int nfs4_proc_getdevicelist(struct nfs_server
*server
,
6437 const struct nfs_fh
*fh
,
6438 struct pnfs_devicelist
*devlist
)
6440 struct nfs4_exception exception
= { };
6444 err
= nfs4_handle_exception(server
,
6445 _nfs4_getdevicelist(server
, fh
, devlist
),
6447 } while (exception
.retry
);
6449 dprintk("%s: err=%d, num_devs=%u\n", __func__
,
6450 err
, devlist
->num_devs
);
6454 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist
);
6457 _nfs4_proc_getdeviceinfo(struct nfs_server
*server
, struct pnfs_device
*pdev
)
6459 struct nfs4_getdeviceinfo_args args
= {
6462 struct nfs4_getdeviceinfo_res res
= {
6465 struct rpc_message msg
= {
6466 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETDEVICEINFO
],
6472 dprintk("--> %s\n", __func__
);
6473 status
= nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
6474 dprintk("<-- %s status=%d\n", __func__
, status
);
6479 int nfs4_proc_getdeviceinfo(struct nfs_server
*server
, struct pnfs_device
*pdev
)
6481 struct nfs4_exception exception
= { };
6485 err
= nfs4_handle_exception(server
,
6486 _nfs4_proc_getdeviceinfo(server
, pdev
),
6488 } while (exception
.retry
);
6491 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo
);
6493 static void nfs4_layoutcommit_prepare(struct rpc_task
*task
, void *calldata
)
6495 struct nfs4_layoutcommit_data
*data
= calldata
;
6496 struct nfs_server
*server
= NFS_SERVER(data
->args
.inode
);
6498 if (nfs4_setup_sequence(server
, &data
->args
.seq_args
,
6499 &data
->res
.seq_res
, task
))
6501 rpc_call_start(task
);
6505 nfs4_layoutcommit_done(struct rpc_task
*task
, void *calldata
)
6507 struct nfs4_layoutcommit_data
*data
= calldata
;
6508 struct nfs_server
*server
= NFS_SERVER(data
->args
.inode
);
6510 if (!nfs4_sequence_done(task
, &data
->res
.seq_res
))
6513 switch (task
->tk_status
) { /* Just ignore these failures */
6514 case -NFS4ERR_DELEG_REVOKED
: /* layout was recalled */
6515 case -NFS4ERR_BADIOMODE
: /* no IOMODE_RW layout for range */
6516 case -NFS4ERR_BADLAYOUT
: /* no layout */
6517 case -NFS4ERR_GRACE
: /* loca_recalim always false */
6518 task
->tk_status
= 0;
6521 nfs_post_op_update_inode_force_wcc(data
->args
.inode
,
6525 if (nfs4_async_handle_error(task
, server
, NULL
) == -EAGAIN
) {
6526 rpc_restart_call_prepare(task
);
6532 static void nfs4_layoutcommit_release(void *calldata
)
6534 struct nfs4_layoutcommit_data
*data
= calldata
;
6535 struct pnfs_layout_segment
*lseg
, *tmp
;
6536 unsigned long *bitlock
= &NFS_I(data
->args
.inode
)->flags
;
6538 pnfs_cleanup_layoutcommit(data
);
6539 /* Matched by references in pnfs_set_layoutcommit */
6540 list_for_each_entry_safe(lseg
, tmp
, &data
->lseg_list
, pls_lc_list
) {
6541 list_del_init(&lseg
->pls_lc_list
);
6542 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT
,
6547 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING
, bitlock
);
6548 smp_mb__after_clear_bit();
6549 wake_up_bit(bitlock
, NFS_INO_LAYOUTCOMMITTING
);
6551 put_rpccred(data
->cred
);
6555 static const struct rpc_call_ops nfs4_layoutcommit_ops
= {
6556 .rpc_call_prepare
= nfs4_layoutcommit_prepare
,
6557 .rpc_call_done
= nfs4_layoutcommit_done
,
6558 .rpc_release
= nfs4_layoutcommit_release
,
6562 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data
*data
, bool sync
)
6564 struct rpc_message msg
= {
6565 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LAYOUTCOMMIT
],
6566 .rpc_argp
= &data
->args
,
6567 .rpc_resp
= &data
->res
,
6568 .rpc_cred
= data
->cred
,
6570 struct rpc_task_setup task_setup_data
= {
6571 .task
= &data
->task
,
6572 .rpc_client
= NFS_CLIENT(data
->args
.inode
),
6573 .rpc_message
= &msg
,
6574 .callback_ops
= &nfs4_layoutcommit_ops
,
6575 .callback_data
= data
,
6576 .flags
= RPC_TASK_ASYNC
,
6578 struct rpc_task
*task
;
6581 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6582 "lbw: %llu inode %lu\n",
6583 data
->task
.tk_pid
, sync
,
6584 data
->args
.lastbytewritten
,
6585 data
->args
.inode
->i_ino
);
6587 nfs41_init_sequence(&data
->args
.seq_args
, &data
->res
.seq_res
, 1);
6588 task
= rpc_run_task(&task_setup_data
);
6590 return PTR_ERR(task
);
6593 status
= nfs4_wait_for_completion_rpc_task(task
);
6596 status
= task
->tk_status
;
6598 dprintk("%s: status %d\n", __func__
, status
);
6604 _nfs41_proc_secinfo_no_name(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
6605 struct nfs_fsinfo
*info
, struct nfs4_secinfo_flavors
*flavors
)
6607 struct nfs41_secinfo_no_name_args args
= {
6608 .style
= SECINFO_STYLE_CURRENT_FH
,
6610 struct nfs4_secinfo_res res
= {
6613 struct rpc_message msg
= {
6614 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SECINFO_NO_NAME
],
6618 return nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
6622 nfs41_proc_secinfo_no_name(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
6623 struct nfs_fsinfo
*info
, struct nfs4_secinfo_flavors
*flavors
)
6625 struct nfs4_exception exception
= { };
6628 err
= _nfs41_proc_secinfo_no_name(server
, fhandle
, info
, flavors
);
6631 case -NFS4ERR_WRONGSEC
:
6632 case -NFS4ERR_NOTSUPP
:
6635 err
= nfs4_handle_exception(server
, err
, &exception
);
6637 } while (exception
.retry
);
6643 nfs41_find_root_sec(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
6644 struct nfs_fsinfo
*info
)
6648 rpc_authflavor_t flavor
;
6649 struct nfs4_secinfo_flavors
*flavors
;
6651 page
= alloc_page(GFP_KERNEL
);
6657 flavors
= page_address(page
);
6658 err
= nfs41_proc_secinfo_no_name(server
, fhandle
, info
, flavors
);
6661 * Fall back on "guess and check" method if
6662 * the server doesn't support SECINFO_NO_NAME
6664 if (err
== -NFS4ERR_WRONGSEC
|| err
== -NFS4ERR_NOTSUPP
) {
6665 err
= nfs4_find_root_sec(server
, fhandle
, info
);
6671 flavor
= nfs_find_best_sec(flavors
);
6673 err
= nfs4_lookup_root_sec(server
, fhandle
, info
, flavor
);
6683 static int _nfs41_test_stateid(struct nfs_server
*server
, nfs4_stateid
*stateid
)
6686 struct nfs41_test_stateid_args args
= {
6689 struct nfs41_test_stateid_res res
;
6690 struct rpc_message msg
= {
6691 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_TEST_STATEID
],
6696 dprintk("NFS call test_stateid %p\n", stateid
);
6697 nfs41_init_sequence(&args
.seq_args
, &res
.seq_res
, 0);
6698 status
= nfs4_call_sync_sequence(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 1);
6699 if (status
!= NFS_OK
) {
6700 dprintk("NFS reply test_stateid: failed, %d\n", status
);
6703 dprintk("NFS reply test_stateid: succeeded, %d\n", -res
.status
);
6708 * nfs41_test_stateid - perform a TEST_STATEID operation
6710 * @server: server / transport on which to perform the operation
6711 * @stateid: state ID to test
6713 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6714 * Otherwise a negative NFS4ERR value is returned if the operation
6715 * failed or the state ID is not currently valid.
6717 static int nfs41_test_stateid(struct nfs_server
*server
, nfs4_stateid
*stateid
)
6719 struct nfs4_exception exception
= { };
6722 err
= _nfs41_test_stateid(server
, stateid
);
6723 if (err
!= -NFS4ERR_DELAY
)
6725 nfs4_handle_exception(server
, err
, &exception
);
6726 } while (exception
.retry
);
6730 static int _nfs4_free_stateid(struct nfs_server
*server
, nfs4_stateid
*stateid
)
6732 struct nfs41_free_stateid_args args
= {
6735 struct nfs41_free_stateid_res res
;
6736 struct rpc_message msg
= {
6737 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FREE_STATEID
],
6743 dprintk("NFS call free_stateid %p\n", stateid
);
6744 nfs41_init_sequence(&args
.seq_args
, &res
.seq_res
, 0);
6745 status
= nfs4_call_sync_sequence(server
->client
, server
, &msg
,
6746 &args
.seq_args
, &res
.seq_res
, 1);
6747 dprintk("NFS reply free_stateid: %d\n", status
);
6752 * nfs41_free_stateid - perform a FREE_STATEID operation
6754 * @server: server / transport on which to perform the operation
6755 * @stateid: state ID to release
6757 * Returns NFS_OK if the server freed "stateid". Otherwise a
6758 * negative NFS4ERR value is returned.
6760 static int nfs41_free_stateid(struct nfs_server
*server
, nfs4_stateid
*stateid
)
6762 struct nfs4_exception exception
= { };
6765 err
= _nfs4_free_stateid(server
, stateid
);
6766 if (err
!= -NFS4ERR_DELAY
)
6768 nfs4_handle_exception(server
, err
, &exception
);
6769 } while (exception
.retry
);
6773 static bool nfs41_match_stateid(const nfs4_stateid
*s1
,
6774 const nfs4_stateid
*s2
)
6776 if (memcmp(s1
->other
, s2
->other
, sizeof(s1
->other
)) != 0)
6779 if (s1
->seqid
== s2
->seqid
)
6781 if (s1
->seqid
== 0 || s2
->seqid
== 0)
6787 #endif /* CONFIG_NFS_V4_1 */
6789 static bool nfs4_match_stateid(const nfs4_stateid
*s1
,
6790 const nfs4_stateid
*s2
)
6792 return nfs4_stateid_match(s1
, s2
);
6796 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops
= {
6797 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
6798 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
6799 .recover_open
= nfs4_open_reclaim
,
6800 .recover_lock
= nfs4_lock_reclaim
,
6801 .establish_clid
= nfs4_init_clientid
,
6802 .get_clid_cred
= nfs4_get_setclientid_cred
,
6805 #if defined(CONFIG_NFS_V4_1)
6806 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops
= {
6807 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
6808 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
6809 .recover_open
= nfs4_open_reclaim
,
6810 .recover_lock
= nfs4_lock_reclaim
,
6811 .establish_clid
= nfs41_init_clientid
,
6812 .get_clid_cred
= nfs4_get_exchange_id_cred
,
6813 .reclaim_complete
= nfs41_proc_reclaim_complete
,
6815 #endif /* CONFIG_NFS_V4_1 */
6817 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops
= {
6818 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
6819 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
6820 .recover_open
= nfs4_open_expired
,
6821 .recover_lock
= nfs4_lock_expired
,
6822 .establish_clid
= nfs4_init_clientid
,
6823 .get_clid_cred
= nfs4_get_setclientid_cred
,
6826 #if defined(CONFIG_NFS_V4_1)
6827 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops
= {
6828 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
6829 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
6830 .recover_open
= nfs41_open_expired
,
6831 .recover_lock
= nfs41_lock_expired
,
6832 .establish_clid
= nfs41_init_clientid
,
6833 .get_clid_cred
= nfs4_get_exchange_id_cred
,
6835 #endif /* CONFIG_NFS_V4_1 */
6837 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops
= {
6838 .sched_state_renewal
= nfs4_proc_async_renew
,
6839 .get_state_renewal_cred_locked
= nfs4_get_renew_cred_locked
,
6840 .renew_lease
= nfs4_proc_renew
,
6843 #if defined(CONFIG_NFS_V4_1)
6844 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops
= {
6845 .sched_state_renewal
= nfs41_proc_async_sequence
,
6846 .get_state_renewal_cred_locked
= nfs4_get_machine_cred_locked
,
6847 .renew_lease
= nfs4_proc_sequence
,
6851 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops
= {
6853 .call_sync
= _nfs4_call_sync
,
6854 .match_stateid
= nfs4_match_stateid
,
6855 .find_root_sec
= nfs4_find_root_sec
,
6856 .reboot_recovery_ops
= &nfs40_reboot_recovery_ops
,
6857 .nograce_recovery_ops
= &nfs40_nograce_recovery_ops
,
6858 .state_renewal_ops
= &nfs40_state_renewal_ops
,
6861 #if defined(CONFIG_NFS_V4_1)
6862 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops
= {
6864 .call_sync
= _nfs4_call_sync_session
,
6865 .match_stateid
= nfs41_match_stateid
,
6866 .find_root_sec
= nfs41_find_root_sec
,
6867 .reboot_recovery_ops
= &nfs41_reboot_recovery_ops
,
6868 .nograce_recovery_ops
= &nfs41_nograce_recovery_ops
,
6869 .state_renewal_ops
= &nfs41_state_renewal_ops
,
6873 const struct nfs4_minor_version_ops
*nfs_v4_minor_ops
[] = {
6874 [0] = &nfs_v4_0_minor_ops
,
6875 #if defined(CONFIG_NFS_V4_1)
6876 [1] = &nfs_v4_1_minor_ops
,
6880 const struct inode_operations nfs4_dir_inode_operations
= {
6881 .create
= nfs_create
,
6882 .lookup
= nfs_lookup
,
6883 .atomic_open
= nfs_atomic_open
,
6885 .unlink
= nfs_unlink
,
6886 .symlink
= nfs_symlink
,
6890 .rename
= nfs_rename
,
6891 .permission
= nfs_permission
,
6892 .getattr
= nfs_getattr
,
6893 .setattr
= nfs_setattr
,
6894 .getxattr
= generic_getxattr
,
6895 .setxattr
= generic_setxattr
,
6896 .listxattr
= generic_listxattr
,
6897 .removexattr
= generic_removexattr
,
6900 static const struct inode_operations nfs4_file_inode_operations
= {
6901 .permission
= nfs_permission
,
6902 .getattr
= nfs_getattr
,
6903 .setattr
= nfs_setattr
,
6904 .getxattr
= generic_getxattr
,
6905 .setxattr
= generic_setxattr
,
6906 .listxattr
= generic_listxattr
,
6907 .removexattr
= generic_removexattr
,
6910 const struct nfs_rpc_ops nfs_v4_clientops
= {
6911 .version
= 4, /* protocol version */
6912 .dentry_ops
= &nfs4_dentry_operations
,
6913 .dir_inode_ops
= &nfs4_dir_inode_operations
,
6914 .file_inode_ops
= &nfs4_file_inode_operations
,
6915 .file_ops
= &nfs4_file_operations
,
6916 .getroot
= nfs4_proc_get_root
,
6917 .submount
= nfs4_submount
,
6918 .try_mount
= nfs4_try_mount
,
6919 .getattr
= nfs4_proc_getattr
,
6920 .setattr
= nfs4_proc_setattr
,
6921 .lookup
= nfs4_proc_lookup
,
6922 .access
= nfs4_proc_access
,
6923 .readlink
= nfs4_proc_readlink
,
6924 .create
= nfs4_proc_create
,
6925 .remove
= nfs4_proc_remove
,
6926 .unlink_setup
= nfs4_proc_unlink_setup
,
6927 .unlink_rpc_prepare
= nfs4_proc_unlink_rpc_prepare
,
6928 .unlink_done
= nfs4_proc_unlink_done
,
6929 .rename
= nfs4_proc_rename
,
6930 .rename_setup
= nfs4_proc_rename_setup
,
6931 .rename_rpc_prepare
= nfs4_proc_rename_rpc_prepare
,
6932 .rename_done
= nfs4_proc_rename_done
,
6933 .link
= nfs4_proc_link
,
6934 .symlink
= nfs4_proc_symlink
,
6935 .mkdir
= nfs4_proc_mkdir
,
6936 .rmdir
= nfs4_proc_remove
,
6937 .readdir
= nfs4_proc_readdir
,
6938 .mknod
= nfs4_proc_mknod
,
6939 .statfs
= nfs4_proc_statfs
,
6940 .fsinfo
= nfs4_proc_fsinfo
,
6941 .pathconf
= nfs4_proc_pathconf
,
6942 .set_capabilities
= nfs4_server_capabilities
,
6943 .decode_dirent
= nfs4_decode_dirent
,
6944 .read_setup
= nfs4_proc_read_setup
,
6945 .read_pageio_init
= pnfs_pageio_init_read
,
6946 .read_rpc_prepare
= nfs4_proc_read_rpc_prepare
,
6947 .read_done
= nfs4_read_done
,
6948 .write_setup
= nfs4_proc_write_setup
,
6949 .write_pageio_init
= pnfs_pageio_init_write
,
6950 .write_rpc_prepare
= nfs4_proc_write_rpc_prepare
,
6951 .write_done
= nfs4_write_done
,
6952 .commit_setup
= nfs4_proc_commit_setup
,
6953 .commit_rpc_prepare
= nfs4_proc_commit_rpc_prepare
,
6954 .commit_done
= nfs4_commit_done
,
6955 .lock
= nfs4_proc_lock
,
6956 .clear_acl_cache
= nfs4_zap_acl_attr
,
6957 .close_context
= nfs4_close_context
,
6958 .open_context
= nfs4_atomic_open
,
6959 .have_delegation
= nfs4_have_delegation
,
6960 .return_delegation
= nfs4_inode_return_delegation
,
6961 .alloc_client
= nfs4_alloc_client
,
6962 .init_client
= nfs4_init_client
,
6963 .free_client
= nfs4_free_client
,
6964 .create_server
= nfs4_create_server
,
6965 .clone_server
= nfs_clone_server
,
6968 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler
= {
6969 .prefix
= XATTR_NAME_NFSV4_ACL
,
6970 .list
= nfs4_xattr_list_nfs4_acl
,
6971 .get
= nfs4_xattr_get_nfs4_acl
,
6972 .set
= nfs4_xattr_set_nfs4_acl
,
6975 const struct xattr_handler
*nfs4_xattr_handlers
[] = {
6976 &nfs4_xattr_nfs4_acl_handler
,