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/sunrpc/gss_api.h>
47 #include <linux/nfs.h>
48 #include <linux/nfs4.h>
49 #include <linux/nfs_fs.h>
50 #include <linux/nfs_page.h>
51 #include <linux/nfs_mount.h>
52 #include <linux/namei.h>
53 #include <linux/mount.h>
54 #include <linux/module.h>
55 #include <linux/nfs_idmap.h>
56 #include <linux/sunrpc/bc_xprt.h>
57 #include <linux/xattr.h>
58 #include <linux/utsname.h>
59 #include <linux/freezer.h>
62 #include "delegation.h"
69 #define NFSDBG_FACILITY NFSDBG_PROC
71 #define NFS4_POLL_RETRY_MIN (HZ/10)
72 #define NFS4_POLL_RETRY_MAX (15*HZ)
74 #define NFS4_MAX_LOOP_ON_RECOVER (10)
76 static unsigned short max_session_slots
= NFS4_DEF_SLOT_TABLE_SIZE
;
79 static int _nfs4_proc_open(struct nfs4_opendata
*data
);
80 static int _nfs4_recover_proc_open(struct nfs4_opendata
*data
);
81 static int nfs4_do_fsinfo(struct nfs_server
*, struct nfs_fh
*, struct nfs_fsinfo
*);
82 static int nfs4_async_handle_error(struct rpc_task
*, const struct nfs_server
*, struct nfs4_state
*);
83 static void nfs_fixup_referral_attributes(struct nfs_fattr
*fattr
);
84 static int nfs4_proc_getattr(struct nfs_server
*, struct nfs_fh
*, struct nfs_fattr
*);
85 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
86 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
87 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
88 struct nfs4_state
*state
);
89 #ifdef CONFIG_NFS_V4_1
90 static int nfs41_test_stateid(struct nfs_server
*, nfs4_stateid
*);
91 static int nfs41_free_stateid(struct nfs_server
*, nfs4_stateid
*);
93 /* Prevent leaks of NFSv4 errors into userland */
94 static int nfs4_map_errors(int err
)
99 case -NFS4ERR_RESOURCE
:
101 case -NFS4ERR_WRONGSEC
:
103 case -NFS4ERR_BADOWNER
:
104 case -NFS4ERR_BADNAME
:
106 case -NFS4ERR_SHARE_DENIED
:
108 case -NFS4ERR_MINOR_VERS_MISMATCH
:
109 return -EPROTONOSUPPORT
;
111 dprintk("%s could not handle NFSv4 error %d\n",
119 * This is our standard bitmap for GETATTR requests.
121 const u32 nfs4_fattr_bitmap
[3] = {
123 | FATTR4_WORD0_CHANGE
126 | FATTR4_WORD0_FILEID
,
128 | FATTR4_WORD1_NUMLINKS
130 | FATTR4_WORD1_OWNER_GROUP
131 | FATTR4_WORD1_RAWDEV
132 | FATTR4_WORD1_SPACE_USED
133 | FATTR4_WORD1_TIME_ACCESS
134 | FATTR4_WORD1_TIME_METADATA
135 | FATTR4_WORD1_TIME_MODIFY
138 static const u32 nfs4_pnfs_open_bitmap
[3] = {
140 | FATTR4_WORD0_CHANGE
143 | FATTR4_WORD0_FILEID
,
145 | FATTR4_WORD1_NUMLINKS
147 | FATTR4_WORD1_OWNER_GROUP
148 | FATTR4_WORD1_RAWDEV
149 | FATTR4_WORD1_SPACE_USED
150 | FATTR4_WORD1_TIME_ACCESS
151 | FATTR4_WORD1_TIME_METADATA
152 | FATTR4_WORD1_TIME_MODIFY
,
153 FATTR4_WORD2_MDSTHRESHOLD
156 const u32 nfs4_statfs_bitmap
[2] = {
157 FATTR4_WORD0_FILES_AVAIL
158 | FATTR4_WORD0_FILES_FREE
159 | FATTR4_WORD0_FILES_TOTAL
,
160 FATTR4_WORD1_SPACE_AVAIL
161 | FATTR4_WORD1_SPACE_FREE
162 | FATTR4_WORD1_SPACE_TOTAL
165 const u32 nfs4_pathconf_bitmap
[2] = {
167 | FATTR4_WORD0_MAXNAME
,
171 const u32 nfs4_fsinfo_bitmap
[3] = { FATTR4_WORD0_MAXFILESIZE
172 | FATTR4_WORD0_MAXREAD
173 | FATTR4_WORD0_MAXWRITE
174 | FATTR4_WORD0_LEASE_TIME
,
175 FATTR4_WORD1_TIME_DELTA
176 | FATTR4_WORD1_FS_LAYOUT_TYPES
,
177 FATTR4_WORD2_LAYOUT_BLKSIZE
180 const u32 nfs4_fs_locations_bitmap
[2] = {
182 | FATTR4_WORD0_CHANGE
185 | FATTR4_WORD0_FILEID
186 | FATTR4_WORD0_FS_LOCATIONS
,
188 | FATTR4_WORD1_NUMLINKS
190 | FATTR4_WORD1_OWNER_GROUP
191 | FATTR4_WORD1_RAWDEV
192 | FATTR4_WORD1_SPACE_USED
193 | FATTR4_WORD1_TIME_ACCESS
194 | FATTR4_WORD1_TIME_METADATA
195 | FATTR4_WORD1_TIME_MODIFY
196 | FATTR4_WORD1_MOUNTED_ON_FILEID
199 static void nfs4_setup_readdir(u64 cookie
, __be32
*verifier
, struct dentry
*dentry
,
200 struct nfs4_readdir_arg
*readdir
)
204 BUG_ON(readdir
->count
< 80);
206 readdir
->cookie
= cookie
;
207 memcpy(&readdir
->verifier
, verifier
, sizeof(readdir
->verifier
));
212 memset(&readdir
->verifier
, 0, sizeof(readdir
->verifier
));
217 * NFSv4 servers do not return entries for '.' and '..'
218 * Therefore, we fake these entries here. We let '.'
219 * have cookie 0 and '..' have cookie 1. Note that
220 * when talking to the server, we always send cookie 0
223 start
= p
= kmap_atomic(*readdir
->pages
);
226 *p
++ = xdr_one
; /* next */
227 *p
++ = xdr_zero
; /* cookie, first word */
228 *p
++ = xdr_one
; /* cookie, second word */
229 *p
++ = xdr_one
; /* entry len */
230 memcpy(p
, ".\0\0\0", 4); /* entry */
232 *p
++ = xdr_one
; /* bitmap length */
233 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
234 *p
++ = htonl(8); /* attribute buffer length */
235 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_inode
));
238 *p
++ = xdr_one
; /* next */
239 *p
++ = xdr_zero
; /* cookie, first word */
240 *p
++ = xdr_two
; /* cookie, second word */
241 *p
++ = xdr_two
; /* entry len */
242 memcpy(p
, "..\0\0", 4); /* entry */
244 *p
++ = xdr_one
; /* bitmap length */
245 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
246 *p
++ = htonl(8); /* attribute buffer length */
247 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_parent
->d_inode
));
249 readdir
->pgbase
= (char *)p
- (char *)start
;
250 readdir
->count
-= readdir
->pgbase
;
251 kunmap_atomic(start
);
254 static int nfs4_wait_clnt_recover(struct nfs_client
*clp
)
260 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
,
261 nfs_wait_bit_killable
, TASK_KILLABLE
);
265 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
272 *timeout
= NFS4_POLL_RETRY_MIN
;
273 if (*timeout
> NFS4_POLL_RETRY_MAX
)
274 *timeout
= NFS4_POLL_RETRY_MAX
;
275 freezable_schedule_timeout_killable(*timeout
);
276 if (fatal_signal_pending(current
))
282 /* This is the error handling routine for processes that are allowed
285 static int nfs4_handle_exception(struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
287 struct nfs_client
*clp
= server
->nfs_client
;
288 struct nfs4_state
*state
= exception
->state
;
289 struct inode
*inode
= exception
->inode
;
292 exception
->retry
= 0;
296 case -NFS4ERR_OPENMODE
:
297 if (inode
&& nfs_have_delegation(inode
, FMODE_READ
)) {
298 nfs_inode_return_delegation(inode
);
299 exception
->retry
= 1;
304 nfs4_schedule_stateid_recovery(server
, state
);
305 goto wait_on_recovery
;
306 case -NFS4ERR_DELEG_REVOKED
:
307 case -NFS4ERR_ADMIN_REVOKED
:
308 case -NFS4ERR_BAD_STATEID
:
311 nfs_remove_bad_delegation(state
->inode
);
312 nfs4_schedule_stateid_recovery(server
, state
);
313 goto wait_on_recovery
;
314 case -NFS4ERR_EXPIRED
:
316 nfs4_schedule_stateid_recovery(server
, state
);
317 case -NFS4ERR_STALE_STATEID
:
318 case -NFS4ERR_STALE_CLIENTID
:
319 nfs4_schedule_lease_recovery(clp
);
320 goto wait_on_recovery
;
321 #if defined(CONFIG_NFS_V4_1)
322 case -NFS4ERR_BADSESSION
:
323 case -NFS4ERR_BADSLOT
:
324 case -NFS4ERR_BAD_HIGH_SLOT
:
325 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
326 case -NFS4ERR_DEADSESSION
:
327 case -NFS4ERR_SEQ_FALSE_RETRY
:
328 case -NFS4ERR_SEQ_MISORDERED
:
329 dprintk("%s ERROR: %d Reset session\n", __func__
,
331 nfs4_schedule_session_recovery(clp
->cl_session
, errorcode
);
332 exception
->retry
= 1;
334 #endif /* defined(CONFIG_NFS_V4_1) */
335 case -NFS4ERR_FILE_OPEN
:
336 if (exception
->timeout
> HZ
) {
337 /* We have retried a decent amount, time to
346 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
349 case -NFS4ERR_RETRY_UNCACHED_REP
:
350 case -NFS4ERR_OLD_STATEID
:
351 exception
->retry
= 1;
353 case -NFS4ERR_BADOWNER
:
354 /* The following works around a Linux server bug! */
355 case -NFS4ERR_BADNAME
:
356 if (server
->caps
& NFS_CAP_UIDGID_NOMAP
) {
357 server
->caps
&= ~NFS_CAP_UIDGID_NOMAP
;
358 exception
->retry
= 1;
359 printk(KERN_WARNING
"NFS: v4 server %s "
360 "does not accept raw "
362 "Reenabling the idmapper.\n",
363 server
->nfs_client
->cl_hostname
);
366 /* We failed to handle the error */
367 return nfs4_map_errors(ret
);
369 ret
= nfs4_wait_clnt_recover(clp
);
371 exception
->retry
= 1;
376 static void do_renew_lease(struct nfs_client
*clp
, unsigned long timestamp
)
378 spin_lock(&clp
->cl_lock
);
379 if (time_before(clp
->cl_last_renewal
,timestamp
))
380 clp
->cl_last_renewal
= timestamp
;
381 spin_unlock(&clp
->cl_lock
);
384 static void renew_lease(const struct nfs_server
*server
, unsigned long timestamp
)
386 do_renew_lease(server
->nfs_client
, timestamp
);
389 #if defined(CONFIG_NFS_V4_1)
392 * nfs4_free_slot - free a slot and efficiently update slot table.
394 * freeing a slot is trivially done by clearing its respective bit
396 * If the freed slotid equals highest_used_slotid we want to update it
397 * so that the server would be able to size down the slot table if needed,
398 * otherwise we know that the highest_used_slotid is still in use.
399 * When updating highest_used_slotid there may be "holes" in the bitmap
400 * so we need to scan down from highest_used_slotid to 0 looking for the now
401 * highest slotid in use.
402 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
404 * Must be called while holding tbl->slot_tbl_lock
407 nfs4_free_slot(struct nfs4_slot_table
*tbl
, u32 slotid
)
409 BUG_ON(slotid
>= NFS4_MAX_SLOT_TABLE
);
410 /* clear used bit in bitmap */
411 __clear_bit(slotid
, tbl
->used_slots
);
413 /* update highest_used_slotid when it is freed */
414 if (slotid
== tbl
->highest_used_slotid
) {
415 slotid
= find_last_bit(tbl
->used_slots
, tbl
->max_slots
);
416 if (slotid
< tbl
->max_slots
)
417 tbl
->highest_used_slotid
= slotid
;
419 tbl
->highest_used_slotid
= NFS4_NO_SLOT
;
421 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__
,
422 slotid
, tbl
->highest_used_slotid
);
425 bool nfs4_set_task_privileged(struct rpc_task
*task
, void *dummy
)
427 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
432 * Signal state manager thread if session fore channel is drained
434 static void nfs4_check_drain_fc_complete(struct nfs4_session
*ses
)
436 if (!test_bit(NFS4_SESSION_DRAINING
, &ses
->session_state
)) {
437 rpc_wake_up_first(&ses
->fc_slot_table
.slot_tbl_waitq
,
438 nfs4_set_task_privileged
, NULL
);
442 if (ses
->fc_slot_table
.highest_used_slotid
!= NFS4_NO_SLOT
)
445 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__
);
446 complete(&ses
->fc_slot_table
.complete
);
450 * Signal state manager thread if session back channel is drained
452 void nfs4_check_drain_bc_complete(struct nfs4_session
*ses
)
454 if (!test_bit(NFS4_SESSION_DRAINING
, &ses
->session_state
) ||
455 ses
->bc_slot_table
.highest_used_slotid
!= NFS4_NO_SLOT
)
457 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__
);
458 complete(&ses
->bc_slot_table
.complete
);
461 static void nfs41_sequence_free_slot(struct nfs4_sequence_res
*res
)
463 struct nfs4_slot_table
*tbl
;
465 tbl
= &res
->sr_session
->fc_slot_table
;
467 /* just wake up the next guy waiting since
468 * we may have not consumed a slot after all */
469 dprintk("%s: No slot\n", __func__
);
473 spin_lock(&tbl
->slot_tbl_lock
);
474 nfs4_free_slot(tbl
, res
->sr_slot
- tbl
->slots
);
475 nfs4_check_drain_fc_complete(res
->sr_session
);
476 spin_unlock(&tbl
->slot_tbl_lock
);
480 static int nfs41_sequence_done(struct rpc_task
*task
, struct nfs4_sequence_res
*res
)
482 unsigned long timestamp
;
483 struct nfs_client
*clp
;
486 * sr_status remains 1 if an RPC level error occurred. The server
487 * may or may not have processed the sequence operation..
488 * Proceed as if the server received and processed the sequence
491 if (res
->sr_status
== 1)
492 res
->sr_status
= NFS_OK
;
494 /* don't increment the sequence number if the task wasn't sent */
495 if (!RPC_WAS_SENT(task
))
498 /* Check the SEQUENCE operation status */
499 switch (res
->sr_status
) {
501 /* Update the slot's sequence and clientid lease timer */
502 ++res
->sr_slot
->seq_nr
;
503 timestamp
= res
->sr_renewal_time
;
504 clp
= res
->sr_session
->clp
;
505 do_renew_lease(clp
, timestamp
);
506 /* Check sequence flags */
507 if (res
->sr_status_flags
!= 0)
508 nfs4_schedule_lease_recovery(clp
);
511 /* The server detected a resend of the RPC call and
512 * returned NFS4ERR_DELAY as per Section 2.10.6.2
515 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
517 res
->sr_slot
- res
->sr_session
->fc_slot_table
.slots
,
518 res
->sr_slot
->seq_nr
);
521 /* Just update the slot sequence no. */
522 ++res
->sr_slot
->seq_nr
;
525 /* The session may be reset by one of the error handlers. */
526 dprintk("%s: Error %d free the slot \n", __func__
, res
->sr_status
);
527 nfs41_sequence_free_slot(res
);
530 if (!rpc_restart_call(task
))
532 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
536 static int nfs4_sequence_done(struct rpc_task
*task
,
537 struct nfs4_sequence_res
*res
)
539 if (res
->sr_session
== NULL
)
541 return nfs41_sequence_done(task
, res
);
545 * nfs4_find_slot - efficiently look for a free slot
547 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
548 * If found, we mark the slot as used, update the highest_used_slotid,
549 * and respectively set up the sequence operation args.
550 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
552 * Note: must be called with under the slot_tbl_lock.
555 nfs4_find_slot(struct nfs4_slot_table
*tbl
)
558 u32 ret_id
= NFS4_NO_SLOT
;
560 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
561 __func__
, tbl
->used_slots
[0], tbl
->highest_used_slotid
,
563 slotid
= find_first_zero_bit(tbl
->used_slots
, tbl
->max_slots
);
564 if (slotid
>= tbl
->max_slots
)
566 __set_bit(slotid
, tbl
->used_slots
);
567 if (slotid
> tbl
->highest_used_slotid
||
568 tbl
->highest_used_slotid
== NFS4_NO_SLOT
)
569 tbl
->highest_used_slotid
= slotid
;
572 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
573 __func__
, tbl
->used_slots
[0], tbl
->highest_used_slotid
, ret_id
);
577 static void nfs41_init_sequence(struct nfs4_sequence_args
*args
,
578 struct nfs4_sequence_res
*res
, int cache_reply
)
580 args
->sa_session
= NULL
;
581 args
->sa_cache_this
= 0;
583 args
->sa_cache_this
= 1;
584 res
->sr_session
= NULL
;
588 int nfs41_setup_sequence(struct nfs4_session
*session
,
589 struct nfs4_sequence_args
*args
,
590 struct nfs4_sequence_res
*res
,
591 struct rpc_task
*task
)
593 struct nfs4_slot
*slot
;
594 struct nfs4_slot_table
*tbl
;
597 dprintk("--> %s\n", __func__
);
598 /* slot already allocated? */
599 if (res
->sr_slot
!= NULL
)
602 tbl
= &session
->fc_slot_table
;
604 spin_lock(&tbl
->slot_tbl_lock
);
605 if (test_bit(NFS4_SESSION_DRAINING
, &session
->session_state
) &&
606 !rpc_task_has_priority(task
, RPC_PRIORITY_PRIVILEGED
)) {
607 /* The state manager will wait until the slot table is empty */
608 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
609 spin_unlock(&tbl
->slot_tbl_lock
);
610 dprintk("%s session is draining\n", __func__
);
614 if (!rpc_queue_empty(&tbl
->slot_tbl_waitq
) &&
615 !rpc_task_has_priority(task
, RPC_PRIORITY_PRIVILEGED
)) {
616 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
617 spin_unlock(&tbl
->slot_tbl_lock
);
618 dprintk("%s enforce FIFO order\n", __func__
);
622 slotid
= nfs4_find_slot(tbl
);
623 if (slotid
== NFS4_NO_SLOT
) {
624 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
625 spin_unlock(&tbl
->slot_tbl_lock
);
626 dprintk("<-- %s: no free slots\n", __func__
);
629 spin_unlock(&tbl
->slot_tbl_lock
);
631 rpc_task_set_priority(task
, RPC_PRIORITY_NORMAL
);
632 slot
= tbl
->slots
+ slotid
;
633 args
->sa_session
= session
;
634 args
->sa_slotid
= slotid
;
636 dprintk("<-- %s slotid=%d seqid=%d\n", __func__
, slotid
, slot
->seq_nr
);
638 res
->sr_session
= session
;
640 res
->sr_renewal_time
= jiffies
;
641 res
->sr_status_flags
= 0;
643 * sr_status is only set in decode_sequence, and so will remain
644 * set to 1 if an rpc level failure occurs.
649 EXPORT_SYMBOL_GPL(nfs41_setup_sequence
);
651 int nfs4_setup_sequence(const struct nfs_server
*server
,
652 struct nfs4_sequence_args
*args
,
653 struct nfs4_sequence_res
*res
,
654 struct rpc_task
*task
)
656 struct nfs4_session
*session
= nfs4_get_session(server
);
662 dprintk("--> %s clp %p session %p sr_slot %td\n",
663 __func__
, session
->clp
, session
, res
->sr_slot
?
664 res
->sr_slot
- session
->fc_slot_table
.slots
: -1);
666 ret
= nfs41_setup_sequence(session
, args
, res
, task
);
668 dprintk("<-- %s status=%d\n", __func__
, ret
);
672 struct nfs41_call_sync_data
{
673 const struct nfs_server
*seq_server
;
674 struct nfs4_sequence_args
*seq_args
;
675 struct nfs4_sequence_res
*seq_res
;
678 static void nfs41_call_sync_prepare(struct rpc_task
*task
, void *calldata
)
680 struct nfs41_call_sync_data
*data
= calldata
;
682 dprintk("--> %s data->seq_server %p\n", __func__
, data
->seq_server
);
684 if (nfs4_setup_sequence(data
->seq_server
, data
->seq_args
,
685 data
->seq_res
, task
))
687 rpc_call_start(task
);
690 static void nfs41_call_priv_sync_prepare(struct rpc_task
*task
, void *calldata
)
692 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
693 nfs41_call_sync_prepare(task
, calldata
);
696 static void nfs41_call_sync_done(struct rpc_task
*task
, void *calldata
)
698 struct nfs41_call_sync_data
*data
= calldata
;
700 nfs41_sequence_done(task
, data
->seq_res
);
703 static const struct rpc_call_ops nfs41_call_sync_ops
= {
704 .rpc_call_prepare
= nfs41_call_sync_prepare
,
705 .rpc_call_done
= nfs41_call_sync_done
,
708 static const struct rpc_call_ops nfs41_call_priv_sync_ops
= {
709 .rpc_call_prepare
= nfs41_call_priv_sync_prepare
,
710 .rpc_call_done
= nfs41_call_sync_done
,
713 static int nfs4_call_sync_sequence(struct rpc_clnt
*clnt
,
714 struct nfs_server
*server
,
715 struct rpc_message
*msg
,
716 struct nfs4_sequence_args
*args
,
717 struct nfs4_sequence_res
*res
,
721 struct rpc_task
*task
;
722 struct nfs41_call_sync_data data
= {
723 .seq_server
= server
,
727 struct rpc_task_setup task_setup
= {
730 .callback_ops
= &nfs41_call_sync_ops
,
731 .callback_data
= &data
735 task_setup
.callback_ops
= &nfs41_call_priv_sync_ops
;
736 task
= rpc_run_task(&task_setup
);
740 ret
= task
->tk_status
;
746 int _nfs4_call_sync_session(struct rpc_clnt
*clnt
,
747 struct nfs_server
*server
,
748 struct rpc_message
*msg
,
749 struct nfs4_sequence_args
*args
,
750 struct nfs4_sequence_res
*res
,
753 nfs41_init_sequence(args
, res
, cache_reply
);
754 return nfs4_call_sync_sequence(clnt
, server
, msg
, args
, res
, 0);
759 void nfs41_init_sequence(struct nfs4_sequence_args
*args
,
760 struct nfs4_sequence_res
*res
, int cache_reply
)
764 static int nfs4_sequence_done(struct rpc_task
*task
,
765 struct nfs4_sequence_res
*res
)
769 #endif /* CONFIG_NFS_V4_1 */
771 int _nfs4_call_sync(struct rpc_clnt
*clnt
,
772 struct nfs_server
*server
,
773 struct rpc_message
*msg
,
774 struct nfs4_sequence_args
*args
,
775 struct nfs4_sequence_res
*res
,
778 nfs41_init_sequence(args
, res
, cache_reply
);
779 return rpc_call_sync(clnt
, msg
, 0);
783 int nfs4_call_sync(struct rpc_clnt
*clnt
,
784 struct nfs_server
*server
,
785 struct rpc_message
*msg
,
786 struct nfs4_sequence_args
*args
,
787 struct nfs4_sequence_res
*res
,
790 return server
->nfs_client
->cl_mvops
->call_sync(clnt
, server
, msg
,
791 args
, res
, cache_reply
);
794 static void update_changeattr(struct inode
*dir
, struct nfs4_change_info
*cinfo
)
796 struct nfs_inode
*nfsi
= NFS_I(dir
);
798 spin_lock(&dir
->i_lock
);
799 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
800 if (!cinfo
->atomic
|| cinfo
->before
!= dir
->i_version
)
801 nfs_force_lookup_revalidate(dir
);
802 dir
->i_version
= cinfo
->after
;
803 spin_unlock(&dir
->i_lock
);
806 struct nfs4_opendata
{
808 struct nfs_openargs o_arg
;
809 struct nfs_openres o_res
;
810 struct nfs_open_confirmargs c_arg
;
811 struct nfs_open_confirmres c_res
;
812 struct nfs4_string owner_name
;
813 struct nfs4_string group_name
;
814 struct nfs_fattr f_attr
;
816 struct dentry
*dentry
;
817 struct nfs4_state_owner
*owner
;
818 struct nfs4_state
*state
;
820 unsigned long timestamp
;
821 unsigned int rpc_done
: 1;
827 static void nfs4_init_opendata_res(struct nfs4_opendata
*p
)
829 p
->o_res
.f_attr
= &p
->f_attr
;
830 p
->o_res
.seqid
= p
->o_arg
.seqid
;
831 p
->c_res
.seqid
= p
->c_arg
.seqid
;
832 p
->o_res
.server
= p
->o_arg
.server
;
833 nfs_fattr_init(&p
->f_attr
);
834 nfs_fattr_init_names(&p
->f_attr
, &p
->owner_name
, &p
->group_name
);
837 static struct nfs4_opendata
*nfs4_opendata_alloc(struct dentry
*dentry
,
838 struct nfs4_state_owner
*sp
, fmode_t fmode
, int flags
,
839 const struct iattr
*attrs
,
842 struct dentry
*parent
= dget_parent(dentry
);
843 struct inode
*dir
= parent
->d_inode
;
844 struct nfs_server
*server
= NFS_SERVER(dir
);
845 struct nfs4_opendata
*p
;
847 p
= kzalloc(sizeof(*p
), gfp_mask
);
850 p
->o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
, gfp_mask
);
851 if (p
->o_arg
.seqid
== NULL
)
853 nfs_sb_active(dentry
->d_sb
);
854 p
->dentry
= dget(dentry
);
857 atomic_inc(&sp
->so_count
);
858 p
->o_arg
.fh
= NFS_FH(dir
);
859 p
->o_arg
.open_flags
= flags
;
860 p
->o_arg
.fmode
= fmode
& (FMODE_READ
|FMODE_WRITE
);
861 p
->o_arg
.clientid
= server
->nfs_client
->cl_clientid
;
862 p
->o_arg
.id
.create_time
= ktime_to_ns(sp
->so_seqid
.create_time
);
863 p
->o_arg
.id
.uniquifier
= sp
->so_seqid
.owner_id
;
864 p
->o_arg
.name
= &dentry
->d_name
;
865 p
->o_arg
.server
= server
;
866 p
->o_arg
.bitmask
= server
->attr_bitmask
;
867 p
->o_arg
.open_bitmap
= &nfs4_fattr_bitmap
[0];
868 p
->o_arg
.claim
= NFS4_OPEN_CLAIM_NULL
;
869 if (attrs
!= NULL
&& attrs
->ia_valid
!= 0) {
872 p
->o_arg
.u
.attrs
= &p
->attrs
;
873 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
876 verf
[1] = current
->pid
;
877 memcpy(p
->o_arg
.u
.verifier
.data
, verf
,
878 sizeof(p
->o_arg
.u
.verifier
.data
));
880 p
->c_arg
.fh
= &p
->o_res
.fh
;
881 p
->c_arg
.stateid
= &p
->o_res
.stateid
;
882 p
->c_arg
.seqid
= p
->o_arg
.seqid
;
883 nfs4_init_opendata_res(p
);
893 static void nfs4_opendata_free(struct kref
*kref
)
895 struct nfs4_opendata
*p
= container_of(kref
,
896 struct nfs4_opendata
, kref
);
897 struct super_block
*sb
= p
->dentry
->d_sb
;
899 nfs_free_seqid(p
->o_arg
.seqid
);
900 if (p
->state
!= NULL
)
901 nfs4_put_open_state(p
->state
);
902 nfs4_put_state_owner(p
->owner
);
906 nfs_fattr_free_names(&p
->f_attr
);
910 static void nfs4_opendata_put(struct nfs4_opendata
*p
)
913 kref_put(&p
->kref
, nfs4_opendata_free
);
916 static int nfs4_wait_for_completion_rpc_task(struct rpc_task
*task
)
920 ret
= rpc_wait_for_completion_task(task
);
924 static int can_open_cached(struct nfs4_state
*state
, fmode_t mode
, int open_mode
)
928 if (open_mode
& (O_EXCL
|O_TRUNC
))
930 switch (mode
& (FMODE_READ
|FMODE_WRITE
)) {
932 ret
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0
933 && state
->n_rdonly
!= 0;
936 ret
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0
937 && state
->n_wronly
!= 0;
939 case FMODE_READ
|FMODE_WRITE
:
940 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0
941 && state
->n_rdwr
!= 0;
947 static int can_open_delegated(struct nfs_delegation
*delegation
, fmode_t fmode
)
949 if (delegation
== NULL
)
951 if ((delegation
->type
& fmode
) != fmode
)
953 if (test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
))
955 nfs_mark_delegation_referenced(delegation
);
959 static void update_open_stateflags(struct nfs4_state
*state
, fmode_t fmode
)
968 case FMODE_READ
|FMODE_WRITE
:
971 nfs4_state_set_mode_locked(state
, state
->state
| fmode
);
974 static void nfs_set_open_stateid_locked(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
976 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
977 nfs4_stateid_copy(&state
->stateid
, stateid
);
978 nfs4_stateid_copy(&state
->open_stateid
, stateid
);
981 set_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
984 set_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
986 case FMODE_READ
|FMODE_WRITE
:
987 set_bit(NFS_O_RDWR_STATE
, &state
->flags
);
991 static void nfs_set_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
993 write_seqlock(&state
->seqlock
);
994 nfs_set_open_stateid_locked(state
, stateid
, fmode
);
995 write_sequnlock(&state
->seqlock
);
998 static void __update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, const nfs4_stateid
*deleg_stateid
, fmode_t fmode
)
1001 * Protect the call to nfs4_state_set_mode_locked and
1002 * serialise the stateid update
1004 write_seqlock(&state
->seqlock
);
1005 if (deleg_stateid
!= NULL
) {
1006 nfs4_stateid_copy(&state
->stateid
, deleg_stateid
);
1007 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
1009 if (open_stateid
!= NULL
)
1010 nfs_set_open_stateid_locked(state
, open_stateid
, fmode
);
1011 write_sequnlock(&state
->seqlock
);
1012 spin_lock(&state
->owner
->so_lock
);
1013 update_open_stateflags(state
, fmode
);
1014 spin_unlock(&state
->owner
->so_lock
);
1017 static int update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, nfs4_stateid
*delegation
, fmode_t fmode
)
1019 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
1020 struct nfs_delegation
*deleg_cur
;
1023 fmode
&= (FMODE_READ
|FMODE_WRITE
);
1026 deleg_cur
= rcu_dereference(nfsi
->delegation
);
1027 if (deleg_cur
== NULL
)
1030 spin_lock(&deleg_cur
->lock
);
1031 if (nfsi
->delegation
!= deleg_cur
||
1032 (deleg_cur
->type
& fmode
) != fmode
)
1033 goto no_delegation_unlock
;
1035 if (delegation
== NULL
)
1036 delegation
= &deleg_cur
->stateid
;
1037 else if (!nfs4_stateid_match(&deleg_cur
->stateid
, delegation
))
1038 goto no_delegation_unlock
;
1040 nfs_mark_delegation_referenced(deleg_cur
);
1041 __update_open_stateid(state
, open_stateid
, &deleg_cur
->stateid
, fmode
);
1043 no_delegation_unlock
:
1044 spin_unlock(&deleg_cur
->lock
);
1048 if (!ret
&& open_stateid
!= NULL
) {
1049 __update_open_stateid(state
, open_stateid
, NULL
, fmode
);
1057 static void nfs4_return_incompatible_delegation(struct inode
*inode
, fmode_t fmode
)
1059 struct nfs_delegation
*delegation
;
1062 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
1063 if (delegation
== NULL
|| (delegation
->type
& fmode
) == fmode
) {
1068 nfs_inode_return_delegation(inode
);
1071 static struct nfs4_state
*nfs4_try_open_cached(struct nfs4_opendata
*opendata
)
1073 struct nfs4_state
*state
= opendata
->state
;
1074 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
1075 struct nfs_delegation
*delegation
;
1076 int open_mode
= opendata
->o_arg
.open_flags
& (O_EXCL
|O_TRUNC
);
1077 fmode_t fmode
= opendata
->o_arg
.fmode
;
1078 nfs4_stateid stateid
;
1082 if (can_open_cached(state
, fmode
, open_mode
)) {
1083 spin_lock(&state
->owner
->so_lock
);
1084 if (can_open_cached(state
, fmode
, open_mode
)) {
1085 update_open_stateflags(state
, fmode
);
1086 spin_unlock(&state
->owner
->so_lock
);
1087 goto out_return_state
;
1089 spin_unlock(&state
->owner
->so_lock
);
1092 delegation
= rcu_dereference(nfsi
->delegation
);
1093 if (!can_open_delegated(delegation
, fmode
)) {
1097 /* Save the delegation */
1098 nfs4_stateid_copy(&stateid
, &delegation
->stateid
);
1100 ret
= nfs_may_open(state
->inode
, state
->owner
->so_cred
, open_mode
);
1105 /* Try to update the stateid using the delegation */
1106 if (update_open_stateid(state
, NULL
, &stateid
, fmode
))
1107 goto out_return_state
;
1110 return ERR_PTR(ret
);
1112 atomic_inc(&state
->count
);
1116 static struct nfs4_state
*nfs4_opendata_to_nfs4_state(struct nfs4_opendata
*data
)
1118 struct inode
*inode
;
1119 struct nfs4_state
*state
= NULL
;
1120 struct nfs_delegation
*delegation
;
1123 if (!data
->rpc_done
) {
1124 state
= nfs4_try_open_cached(data
);
1129 if (!(data
->f_attr
.valid
& NFS_ATTR_FATTR
))
1131 inode
= nfs_fhget(data
->dir
->d_sb
, &data
->o_res
.fh
, &data
->f_attr
);
1132 ret
= PTR_ERR(inode
);
1136 state
= nfs4_get_open_state(inode
, data
->owner
);
1139 if (data
->o_res
.delegation_type
!= 0) {
1140 struct nfs_client
*clp
= NFS_SERVER(inode
)->nfs_client
;
1141 int delegation_flags
= 0;
1144 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
1146 delegation_flags
= delegation
->flags
;
1148 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_DELEGATE_CUR
) {
1149 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1150 "returning a delegation for "
1151 "OPEN(CLAIM_DELEGATE_CUR)\n",
1153 } else if ((delegation_flags
& 1UL<<NFS_DELEGATION_NEED_RECLAIM
) == 0)
1154 nfs_inode_set_delegation(state
->inode
,
1155 data
->owner
->so_cred
,
1158 nfs_inode_reclaim_delegation(state
->inode
,
1159 data
->owner
->so_cred
,
1163 update_open_stateid(state
, &data
->o_res
.stateid
, NULL
,
1171 return ERR_PTR(ret
);
1174 static struct nfs_open_context
*nfs4_state_find_open_context(struct nfs4_state
*state
)
1176 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
1177 struct nfs_open_context
*ctx
;
1179 spin_lock(&state
->inode
->i_lock
);
1180 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
1181 if (ctx
->state
!= state
)
1183 get_nfs_open_context(ctx
);
1184 spin_unlock(&state
->inode
->i_lock
);
1187 spin_unlock(&state
->inode
->i_lock
);
1188 return ERR_PTR(-ENOENT
);
1191 static struct nfs4_opendata
*nfs4_open_recoverdata_alloc(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1193 struct nfs4_opendata
*opendata
;
1195 opendata
= nfs4_opendata_alloc(ctx
->dentry
, state
->owner
, 0, 0, NULL
, GFP_NOFS
);
1196 if (opendata
== NULL
)
1197 return ERR_PTR(-ENOMEM
);
1198 opendata
->state
= state
;
1199 atomic_inc(&state
->count
);
1203 static int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, fmode_t fmode
, struct nfs4_state
**res
)
1205 struct nfs4_state
*newstate
;
1208 opendata
->o_arg
.open_flags
= 0;
1209 opendata
->o_arg
.fmode
= fmode
;
1210 memset(&opendata
->o_res
, 0, sizeof(opendata
->o_res
));
1211 memset(&opendata
->c_res
, 0, sizeof(opendata
->c_res
));
1212 nfs4_init_opendata_res(opendata
);
1213 ret
= _nfs4_recover_proc_open(opendata
);
1216 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
1217 if (IS_ERR(newstate
))
1218 return PTR_ERR(newstate
);
1219 nfs4_close_state(newstate
, fmode
);
1224 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
1226 struct nfs4_state
*newstate
;
1229 /* memory barrier prior to reading state->n_* */
1230 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
1232 if (state
->n_rdwr
!= 0) {
1233 clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1234 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &newstate
);
1237 if (newstate
!= state
)
1240 if (state
->n_wronly
!= 0) {
1241 clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1242 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &newstate
);
1245 if (newstate
!= state
)
1248 if (state
->n_rdonly
!= 0) {
1249 clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1250 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &newstate
);
1253 if (newstate
!= state
)
1257 * We may have performed cached opens for all three recoveries.
1258 * Check if we need to update the current stateid.
1260 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0 &&
1261 !nfs4_stateid_match(&state
->stateid
, &state
->open_stateid
)) {
1262 write_seqlock(&state
->seqlock
);
1263 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
1264 nfs4_stateid_copy(&state
->stateid
, &state
->open_stateid
);
1265 write_sequnlock(&state
->seqlock
);
1272 * reclaim state on the server after a reboot.
1274 static int _nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1276 struct nfs_delegation
*delegation
;
1277 struct nfs4_opendata
*opendata
;
1278 fmode_t delegation_type
= 0;
1281 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1282 if (IS_ERR(opendata
))
1283 return PTR_ERR(opendata
);
1284 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
1285 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
1287 delegation
= rcu_dereference(NFS_I(state
->inode
)->delegation
);
1288 if (delegation
!= NULL
&& test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) != 0)
1289 delegation_type
= delegation
->type
;
1291 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
1292 status
= nfs4_open_recover(opendata
, state
);
1293 nfs4_opendata_put(opendata
);
1297 static int nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1299 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1300 struct nfs4_exception exception
= { };
1303 err
= _nfs4_do_open_reclaim(ctx
, state
);
1304 if (err
!= -NFS4ERR_DELAY
)
1306 nfs4_handle_exception(server
, err
, &exception
);
1307 } while (exception
.retry
);
1311 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1313 struct nfs_open_context
*ctx
;
1316 ctx
= nfs4_state_find_open_context(state
);
1318 return PTR_ERR(ctx
);
1319 ret
= nfs4_do_open_reclaim(ctx
, state
);
1320 put_nfs_open_context(ctx
);
1324 static int _nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
1326 struct nfs4_opendata
*opendata
;
1329 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1330 if (IS_ERR(opendata
))
1331 return PTR_ERR(opendata
);
1332 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
1333 nfs4_stateid_copy(&opendata
->o_arg
.u
.delegation
, stateid
);
1334 ret
= nfs4_open_recover(opendata
, state
);
1335 nfs4_opendata_put(opendata
);
1339 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
1341 struct nfs4_exception exception
= { };
1342 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1345 err
= _nfs4_open_delegation_recall(ctx
, state
, stateid
);
1351 case -NFS4ERR_BADSESSION
:
1352 case -NFS4ERR_BADSLOT
:
1353 case -NFS4ERR_BAD_HIGH_SLOT
:
1354 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
1355 case -NFS4ERR_DEADSESSION
:
1356 nfs4_schedule_session_recovery(server
->nfs_client
->cl_session
, err
);
1358 case -NFS4ERR_STALE_CLIENTID
:
1359 case -NFS4ERR_STALE_STATEID
:
1360 case -NFS4ERR_EXPIRED
:
1361 /* Don't recall a delegation if it was lost */
1362 nfs4_schedule_lease_recovery(server
->nfs_client
);
1366 * The show must go on: exit, but mark the
1367 * stateid as needing recovery.
1369 case -NFS4ERR_DELEG_REVOKED
:
1370 case -NFS4ERR_ADMIN_REVOKED
:
1371 case -NFS4ERR_BAD_STATEID
:
1372 nfs_inode_find_state_and_recover(state
->inode
,
1374 nfs4_schedule_stateid_recovery(server
, state
);
1377 * User RPCSEC_GSS context has expired.
1378 * We cannot recover this stateid now, so
1379 * skip it and allow recovery thread to
1386 err
= nfs4_handle_exception(server
, err
, &exception
);
1387 } while (exception
.retry
);
1392 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
1394 struct nfs4_opendata
*data
= calldata
;
1396 data
->rpc_status
= task
->tk_status
;
1397 if (data
->rpc_status
== 0) {
1398 nfs4_stateid_copy(&data
->o_res
.stateid
, &data
->c_res
.stateid
);
1399 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
1400 renew_lease(data
->o_res
.server
, data
->timestamp
);
1405 static void nfs4_open_confirm_release(void *calldata
)
1407 struct nfs4_opendata
*data
= calldata
;
1408 struct nfs4_state
*state
= NULL
;
1410 /* If this request hasn't been cancelled, do nothing */
1411 if (data
->cancelled
== 0)
1413 /* In case of error, no cleanup! */
1414 if (!data
->rpc_done
)
1416 state
= nfs4_opendata_to_nfs4_state(data
);
1418 nfs4_close_state(state
, data
->o_arg
.fmode
);
1420 nfs4_opendata_put(data
);
1423 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
1424 .rpc_call_done
= nfs4_open_confirm_done
,
1425 .rpc_release
= nfs4_open_confirm_release
,
1429 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1431 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
1433 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
1434 struct rpc_task
*task
;
1435 struct rpc_message msg
= {
1436 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
1437 .rpc_argp
= &data
->c_arg
,
1438 .rpc_resp
= &data
->c_res
,
1439 .rpc_cred
= data
->owner
->so_cred
,
1441 struct rpc_task_setup task_setup_data
= {
1442 .rpc_client
= server
->client
,
1443 .rpc_message
= &msg
,
1444 .callback_ops
= &nfs4_open_confirm_ops
,
1445 .callback_data
= data
,
1446 .workqueue
= nfsiod_workqueue
,
1447 .flags
= RPC_TASK_ASYNC
,
1451 kref_get(&data
->kref
);
1453 data
->rpc_status
= 0;
1454 data
->timestamp
= jiffies
;
1455 task
= rpc_run_task(&task_setup_data
);
1457 return PTR_ERR(task
);
1458 status
= nfs4_wait_for_completion_rpc_task(task
);
1460 data
->cancelled
= 1;
1463 status
= data
->rpc_status
;
1468 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
1470 struct nfs4_opendata
*data
= calldata
;
1471 struct nfs4_state_owner
*sp
= data
->owner
;
1473 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
1476 * Check if we still need to send an OPEN call, or if we can use
1477 * a delegation instead.
1479 if (data
->state
!= NULL
) {
1480 struct nfs_delegation
*delegation
;
1482 if (can_open_cached(data
->state
, data
->o_arg
.fmode
, data
->o_arg
.open_flags
))
1485 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
1486 if (data
->o_arg
.claim
!= NFS4_OPEN_CLAIM_DELEGATE_CUR
&&
1487 can_open_delegated(delegation
, data
->o_arg
.fmode
))
1488 goto unlock_no_action
;
1491 /* Update client id. */
1492 data
->o_arg
.clientid
= sp
->so_server
->nfs_client
->cl_clientid
;
1493 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
) {
1494 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
1495 nfs_copy_fh(&data
->o_res
.fh
, data
->o_arg
.fh
);
1497 data
->timestamp
= jiffies
;
1498 if (nfs4_setup_sequence(data
->o_arg
.server
,
1499 &data
->o_arg
.seq_args
,
1500 &data
->o_res
.seq_res
, task
))
1502 rpc_call_start(task
);
1507 task
->tk_action
= NULL
;
1511 static void nfs4_recover_open_prepare(struct rpc_task
*task
, void *calldata
)
1513 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
1514 nfs4_open_prepare(task
, calldata
);
1517 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
1519 struct nfs4_opendata
*data
= calldata
;
1521 data
->rpc_status
= task
->tk_status
;
1523 if (!nfs4_sequence_done(task
, &data
->o_res
.seq_res
))
1526 if (task
->tk_status
== 0) {
1527 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
1531 data
->rpc_status
= -ELOOP
;
1534 data
->rpc_status
= -EISDIR
;
1537 data
->rpc_status
= -ENOTDIR
;
1539 renew_lease(data
->o_res
.server
, data
->timestamp
);
1540 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
1541 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
1546 static void nfs4_open_release(void *calldata
)
1548 struct nfs4_opendata
*data
= calldata
;
1549 struct nfs4_state
*state
= NULL
;
1551 /* If this request hasn't been cancelled, do nothing */
1552 if (data
->cancelled
== 0)
1554 /* In case of error, no cleanup! */
1555 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
1557 /* In case we need an open_confirm, no cleanup! */
1558 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
1560 state
= nfs4_opendata_to_nfs4_state(data
);
1562 nfs4_close_state(state
, data
->o_arg
.fmode
);
1564 nfs4_opendata_put(data
);
1567 static const struct rpc_call_ops nfs4_open_ops
= {
1568 .rpc_call_prepare
= nfs4_open_prepare
,
1569 .rpc_call_done
= nfs4_open_done
,
1570 .rpc_release
= nfs4_open_release
,
1573 static const struct rpc_call_ops nfs4_recover_open_ops
= {
1574 .rpc_call_prepare
= nfs4_recover_open_prepare
,
1575 .rpc_call_done
= nfs4_open_done
,
1576 .rpc_release
= nfs4_open_release
,
1579 static int nfs4_run_open_task(struct nfs4_opendata
*data
, int isrecover
)
1581 struct inode
*dir
= data
->dir
->d_inode
;
1582 struct nfs_server
*server
= NFS_SERVER(dir
);
1583 struct nfs_openargs
*o_arg
= &data
->o_arg
;
1584 struct nfs_openres
*o_res
= &data
->o_res
;
1585 struct rpc_task
*task
;
1586 struct rpc_message msg
= {
1587 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
1590 .rpc_cred
= data
->owner
->so_cred
,
1592 struct rpc_task_setup task_setup_data
= {
1593 .rpc_client
= server
->client
,
1594 .rpc_message
= &msg
,
1595 .callback_ops
= &nfs4_open_ops
,
1596 .callback_data
= data
,
1597 .workqueue
= nfsiod_workqueue
,
1598 .flags
= RPC_TASK_ASYNC
,
1602 nfs41_init_sequence(&o_arg
->seq_args
, &o_res
->seq_res
, 1);
1603 kref_get(&data
->kref
);
1605 data
->rpc_status
= 0;
1606 data
->cancelled
= 0;
1608 task_setup_data
.callback_ops
= &nfs4_recover_open_ops
;
1609 task
= rpc_run_task(&task_setup_data
);
1611 return PTR_ERR(task
);
1612 status
= nfs4_wait_for_completion_rpc_task(task
);
1614 data
->cancelled
= 1;
1617 status
= data
->rpc_status
;
1623 static int _nfs4_recover_proc_open(struct nfs4_opendata
*data
)
1625 struct inode
*dir
= data
->dir
->d_inode
;
1626 struct nfs_openres
*o_res
= &data
->o_res
;
1629 status
= nfs4_run_open_task(data
, 1);
1630 if (status
!= 0 || !data
->rpc_done
)
1633 nfs_fattr_map_and_free_names(NFS_SERVER(dir
), &data
->f_attr
);
1635 if (o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1636 status
= _nfs4_proc_open_confirm(data
);
1645 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1647 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
1649 struct inode
*dir
= data
->dir
->d_inode
;
1650 struct nfs_server
*server
= NFS_SERVER(dir
);
1651 struct nfs_openargs
*o_arg
= &data
->o_arg
;
1652 struct nfs_openres
*o_res
= &data
->o_res
;
1655 status
= nfs4_run_open_task(data
, 0);
1656 if (!data
->rpc_done
)
1659 if (status
== -NFS4ERR_BADNAME
&&
1660 !(o_arg
->open_flags
& O_CREAT
))
1665 nfs_fattr_map_and_free_names(server
, &data
->f_attr
);
1667 if (o_arg
->open_flags
& O_CREAT
)
1668 update_changeattr(dir
, &o_res
->cinfo
);
1669 if ((o_res
->rflags
& NFS4_OPEN_RESULT_LOCKTYPE_POSIX
) == 0)
1670 server
->caps
&= ~NFS_CAP_POSIX_LOCK
;
1671 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1672 status
= _nfs4_proc_open_confirm(data
);
1676 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
1677 _nfs4_proc_getattr(server
, &o_res
->fh
, o_res
->f_attr
);
1681 static int nfs4_client_recover_expired_lease(struct nfs_client
*clp
)
1686 for (loop
= NFS4_MAX_LOOP_ON_RECOVER
; loop
!= 0; loop
--) {
1687 ret
= nfs4_wait_clnt_recover(clp
);
1690 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
1691 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
1693 nfs4_schedule_state_manager(clp
);
1699 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
1701 return nfs4_client_recover_expired_lease(server
->nfs_client
);
1706 * reclaim state on the server after a network partition.
1707 * Assumes caller holds the appropriate lock
1709 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1711 struct nfs4_opendata
*opendata
;
1714 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1715 if (IS_ERR(opendata
))
1716 return PTR_ERR(opendata
);
1717 ret
= nfs4_open_recover(opendata
, state
);
1719 d_drop(ctx
->dentry
);
1720 nfs4_opendata_put(opendata
);
1724 static int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1726 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1727 struct nfs4_exception exception
= { };
1731 err
= _nfs4_open_expired(ctx
, state
);
1735 case -NFS4ERR_GRACE
:
1736 case -NFS4ERR_DELAY
:
1737 nfs4_handle_exception(server
, err
, &exception
);
1740 } while (exception
.retry
);
1745 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1747 struct nfs_open_context
*ctx
;
1750 ctx
= nfs4_state_find_open_context(state
);
1752 return PTR_ERR(ctx
);
1753 ret
= nfs4_do_open_expired(ctx
, state
);
1754 put_nfs_open_context(ctx
);
1758 #if defined(CONFIG_NFS_V4_1)
1759 static int nfs41_check_expired_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, unsigned int flags
)
1761 int status
= NFS_OK
;
1762 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1764 if (state
->flags
& flags
) {
1765 status
= nfs41_test_stateid(server
, stateid
);
1766 if (status
!= NFS_OK
) {
1767 nfs41_free_stateid(server
, stateid
);
1768 state
->flags
&= ~flags
;
1774 static int nfs41_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1776 int deleg_status
, open_status
;
1777 int deleg_flags
= 1 << NFS_DELEGATED_STATE
;
1778 int open_flags
= (1 << NFS_O_RDONLY_STATE
) | (1 << NFS_O_WRONLY_STATE
) | (1 << NFS_O_RDWR_STATE
);
1780 deleg_status
= nfs41_check_expired_stateid(state
, &state
->stateid
, deleg_flags
);
1781 open_status
= nfs41_check_expired_stateid(state
, &state
->open_stateid
, open_flags
);
1783 if ((deleg_status
== NFS_OK
) && (open_status
== NFS_OK
))
1785 return nfs4_open_expired(sp
, state
);
1790 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1791 * fields corresponding to attributes that were used to store the verifier.
1792 * Make sure we clobber those fields in the later setattr call
1794 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1796 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1797 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1798 sattr
->ia_valid
|= ATTR_ATIME
;
1800 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1801 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1802 sattr
->ia_valid
|= ATTR_MTIME
;
1806 * Returns a referenced nfs4_state
1808 static int _nfs4_do_open(struct inode
*dir
,
1809 struct dentry
*dentry
,
1812 struct iattr
*sattr
,
1813 struct rpc_cred
*cred
,
1814 struct nfs4_state
**res
,
1815 struct nfs4_threshold
**ctx_th
)
1817 struct nfs4_state_owner
*sp
;
1818 struct nfs4_state
*state
= NULL
;
1819 struct nfs_server
*server
= NFS_SERVER(dir
);
1820 struct nfs4_opendata
*opendata
;
1823 /* Protect against reboot recovery conflicts */
1825 sp
= nfs4_get_state_owner(server
, cred
, GFP_KERNEL
);
1827 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1830 status
= nfs4_recover_expired_lease(server
);
1832 goto err_put_state_owner
;
1833 if (dentry
->d_inode
!= NULL
)
1834 nfs4_return_incompatible_delegation(dentry
->d_inode
, fmode
);
1836 opendata
= nfs4_opendata_alloc(dentry
, sp
, fmode
, flags
, sattr
, GFP_KERNEL
);
1837 if (opendata
== NULL
)
1838 goto err_put_state_owner
;
1840 if (ctx_th
&& server
->attr_bitmask
[2] & FATTR4_WORD2_MDSTHRESHOLD
) {
1841 opendata
->f_attr
.mdsthreshold
= pnfs_mdsthreshold_alloc();
1842 if (!opendata
->f_attr
.mdsthreshold
)
1843 goto err_opendata_put
;
1844 opendata
->o_arg
.open_bitmap
= &nfs4_pnfs_open_bitmap
[0];
1846 if (dentry
->d_inode
!= NULL
)
1847 opendata
->state
= nfs4_get_open_state(dentry
->d_inode
, sp
);
1849 status
= _nfs4_proc_open(opendata
);
1851 goto err_opendata_put
;
1853 state
= nfs4_opendata_to_nfs4_state(opendata
);
1854 status
= PTR_ERR(state
);
1856 goto err_opendata_put
;
1857 if (server
->caps
& NFS_CAP_POSIX_LOCK
)
1858 set_bit(NFS_STATE_POSIX_LOCKS
, &state
->flags
);
1860 if (opendata
->o_arg
.open_flags
& O_EXCL
) {
1861 nfs4_exclusive_attrset(opendata
, sattr
);
1863 nfs_fattr_init(opendata
->o_res
.f_attr
);
1864 status
= nfs4_do_setattr(state
->inode
, cred
,
1865 opendata
->o_res
.f_attr
, sattr
,
1868 nfs_setattr_update_inode(state
->inode
, sattr
);
1869 nfs_post_op_update_inode(state
->inode
, opendata
->o_res
.f_attr
);
1872 if (pnfs_use_threshold(ctx_th
, opendata
->f_attr
.mdsthreshold
, server
))
1873 *ctx_th
= opendata
->f_attr
.mdsthreshold
;
1875 kfree(opendata
->f_attr
.mdsthreshold
);
1876 opendata
->f_attr
.mdsthreshold
= NULL
;
1878 nfs4_opendata_put(opendata
);
1879 nfs4_put_state_owner(sp
);
1883 kfree(opendata
->f_attr
.mdsthreshold
);
1884 nfs4_opendata_put(opendata
);
1885 err_put_state_owner
:
1886 nfs4_put_state_owner(sp
);
1893 static struct nfs4_state
*nfs4_do_open(struct inode
*dir
,
1894 struct dentry
*dentry
,
1897 struct iattr
*sattr
,
1898 struct rpc_cred
*cred
,
1899 struct nfs4_threshold
**ctx_th
)
1901 struct nfs4_exception exception
= { };
1902 struct nfs4_state
*res
;
1905 fmode
&= FMODE_READ
|FMODE_WRITE
;
1907 status
= _nfs4_do_open(dir
, dentry
, fmode
, flags
, sattr
, cred
,
1911 /* NOTE: BAD_SEQID means the server and client disagree about the
1912 * book-keeping w.r.t. state-changing operations
1913 * (OPEN/CLOSE/LOCK/LOCKU...)
1914 * It is actually a sign of a bug on the client or on the server.
1916 * If we receive a BAD_SEQID error in the particular case of
1917 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1918 * have unhashed the old state_owner for us, and that we can
1919 * therefore safely retry using a new one. We should still warn
1920 * the user though...
1922 if (status
== -NFS4ERR_BAD_SEQID
) {
1923 pr_warn_ratelimited("NFS: v4 server %s "
1924 " returned a bad sequence-id error!\n",
1925 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1926 exception
.retry
= 1;
1930 * BAD_STATEID on OPEN means that the server cancelled our
1931 * state before it received the OPEN_CONFIRM.
1932 * Recover by retrying the request as per the discussion
1933 * on Page 181 of RFC3530.
1935 if (status
== -NFS4ERR_BAD_STATEID
) {
1936 exception
.retry
= 1;
1939 if (status
== -EAGAIN
) {
1940 /* We must have found a delegation */
1941 exception
.retry
= 1;
1944 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1945 status
, &exception
));
1946 } while (exception
.retry
);
1950 static int _nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1951 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1952 struct nfs4_state
*state
)
1954 struct nfs_server
*server
= NFS_SERVER(inode
);
1955 struct nfs_setattrargs arg
= {
1956 .fh
= NFS_FH(inode
),
1959 .bitmask
= server
->attr_bitmask
,
1961 struct nfs_setattrres res
= {
1965 struct rpc_message msg
= {
1966 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1971 unsigned long timestamp
= jiffies
;
1974 nfs_fattr_init(fattr
);
1976 if (state
!= NULL
) {
1977 nfs4_select_rw_stateid(&arg
.stateid
, state
, FMODE_WRITE
,
1978 current
->files
, current
->tgid
);
1979 } else if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
,
1981 /* Use that stateid */
1983 nfs4_stateid_copy(&arg
.stateid
, &zero_stateid
);
1985 status
= nfs4_call_sync(server
->client
, server
, &msg
, &arg
.seq_args
, &res
.seq_res
, 1);
1986 if (status
== 0 && state
!= NULL
)
1987 renew_lease(server
, timestamp
);
1991 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1992 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1993 struct nfs4_state
*state
)
1995 struct nfs_server
*server
= NFS_SERVER(inode
);
1996 struct nfs4_exception exception
= {
2002 err
= _nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
);
2004 case -NFS4ERR_OPENMODE
:
2005 if (state
&& !(state
->state
& FMODE_WRITE
)) {
2007 if (sattr
->ia_valid
& ATTR_OPEN
)
2012 err
= nfs4_handle_exception(server
, err
, &exception
);
2013 } while (exception
.retry
);
2018 struct nfs4_closedata
{
2019 struct inode
*inode
;
2020 struct nfs4_state
*state
;
2021 struct nfs_closeargs arg
;
2022 struct nfs_closeres res
;
2023 struct nfs_fattr fattr
;
2024 unsigned long timestamp
;
2029 static void nfs4_free_closedata(void *data
)
2031 struct nfs4_closedata
*calldata
= data
;
2032 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
2033 struct super_block
*sb
= calldata
->state
->inode
->i_sb
;
2036 pnfs_roc_release(calldata
->state
->inode
);
2037 nfs4_put_open_state(calldata
->state
);
2038 nfs_free_seqid(calldata
->arg
.seqid
);
2039 nfs4_put_state_owner(sp
);
2040 nfs_sb_deactive(sb
);
2044 static void nfs4_close_clear_stateid_flags(struct nfs4_state
*state
,
2047 spin_lock(&state
->owner
->so_lock
);
2048 if (!(fmode
& FMODE_READ
))
2049 clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
2050 if (!(fmode
& FMODE_WRITE
))
2051 clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
2052 clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
2053 spin_unlock(&state
->owner
->so_lock
);
2056 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
2058 struct nfs4_closedata
*calldata
= data
;
2059 struct nfs4_state
*state
= calldata
->state
;
2060 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
2062 dprintk("%s: begin!\n", __func__
);
2063 if (!nfs4_sequence_done(task
, &calldata
->res
.seq_res
))
2065 /* hmm. we are done with the inode, and in the process of freeing
2066 * the state_owner. we keep this around to process errors
2068 switch (task
->tk_status
) {
2071 pnfs_roc_set_barrier(state
->inode
,
2072 calldata
->roc_barrier
);
2073 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, 0);
2074 renew_lease(server
, calldata
->timestamp
);
2075 nfs4_close_clear_stateid_flags(state
,
2076 calldata
->arg
.fmode
);
2078 case -NFS4ERR_STALE_STATEID
:
2079 case -NFS4ERR_OLD_STATEID
:
2080 case -NFS4ERR_BAD_STATEID
:
2081 case -NFS4ERR_EXPIRED
:
2082 if (calldata
->arg
.fmode
== 0)
2085 if (nfs4_async_handle_error(task
, server
, state
) == -EAGAIN
)
2086 rpc_restart_call_prepare(task
);
2088 nfs_release_seqid(calldata
->arg
.seqid
);
2089 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
2090 dprintk("%s: done, ret = %d!\n", __func__
, task
->tk_status
);
2093 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
2095 struct nfs4_closedata
*calldata
= data
;
2096 struct nfs4_state
*state
= calldata
->state
;
2099 dprintk("%s: begin!\n", __func__
);
2100 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
2103 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
2104 calldata
->arg
.fmode
= FMODE_READ
|FMODE_WRITE
;
2105 spin_lock(&state
->owner
->so_lock
);
2106 /* Calculate the change in open mode */
2107 if (state
->n_rdwr
== 0) {
2108 if (state
->n_rdonly
== 0) {
2109 call_close
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
2110 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
2111 calldata
->arg
.fmode
&= ~FMODE_READ
;
2113 if (state
->n_wronly
== 0) {
2114 call_close
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
2115 call_close
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
);
2116 calldata
->arg
.fmode
&= ~FMODE_WRITE
;
2119 spin_unlock(&state
->owner
->so_lock
);
2122 /* Note: exit _without_ calling nfs4_close_done */
2123 task
->tk_action
= NULL
;
2127 if (calldata
->arg
.fmode
== 0) {
2128 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
];
2129 if (calldata
->roc
&&
2130 pnfs_roc_drain(calldata
->inode
, &calldata
->roc_barrier
)) {
2131 rpc_sleep_on(&NFS_SERVER(calldata
->inode
)->roc_rpcwaitq
,
2137 nfs_fattr_init(calldata
->res
.fattr
);
2138 calldata
->timestamp
= jiffies
;
2139 if (nfs4_setup_sequence(NFS_SERVER(calldata
->inode
),
2140 &calldata
->arg
.seq_args
,
2141 &calldata
->res
.seq_res
,
2144 rpc_call_start(task
);
2146 dprintk("%s: done!\n", __func__
);
2149 static const struct rpc_call_ops nfs4_close_ops
= {
2150 .rpc_call_prepare
= nfs4_close_prepare
,
2151 .rpc_call_done
= nfs4_close_done
,
2152 .rpc_release
= nfs4_free_closedata
,
2156 * It is possible for data to be read/written from a mem-mapped file
2157 * after the sys_close call (which hits the vfs layer as a flush).
2158 * This means that we can't safely call nfsv4 close on a file until
2159 * the inode is cleared. This in turn means that we are not good
2160 * NFSv4 citizens - we do not indicate to the server to update the file's
2161 * share state even when we are done with one of the three share
2162 * stateid's in the inode.
2164 * NOTE: Caller must be holding the sp->so_owner semaphore!
2166 int nfs4_do_close(struct nfs4_state
*state
, gfp_t gfp_mask
, int wait
, bool roc
)
2168 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
2169 struct nfs4_closedata
*calldata
;
2170 struct nfs4_state_owner
*sp
= state
->owner
;
2171 struct rpc_task
*task
;
2172 struct rpc_message msg
= {
2173 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
2174 .rpc_cred
= state
->owner
->so_cred
,
2176 struct rpc_task_setup task_setup_data
= {
2177 .rpc_client
= server
->client
,
2178 .rpc_message
= &msg
,
2179 .callback_ops
= &nfs4_close_ops
,
2180 .workqueue
= nfsiod_workqueue
,
2181 .flags
= RPC_TASK_ASYNC
,
2183 int status
= -ENOMEM
;
2185 calldata
= kzalloc(sizeof(*calldata
), gfp_mask
);
2186 if (calldata
== NULL
)
2188 nfs41_init_sequence(&calldata
->arg
.seq_args
, &calldata
->res
.seq_res
, 1);
2189 calldata
->inode
= state
->inode
;
2190 calldata
->state
= state
;
2191 calldata
->arg
.fh
= NFS_FH(state
->inode
);
2192 calldata
->arg
.stateid
= &state
->open_stateid
;
2193 /* Serialization for the sequence id */
2194 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
, gfp_mask
);
2195 if (calldata
->arg
.seqid
== NULL
)
2196 goto out_free_calldata
;
2197 calldata
->arg
.fmode
= 0;
2198 calldata
->arg
.bitmask
= server
->cache_consistency_bitmask
;
2199 calldata
->res
.fattr
= &calldata
->fattr
;
2200 calldata
->res
.seqid
= calldata
->arg
.seqid
;
2201 calldata
->res
.server
= server
;
2202 calldata
->roc
= roc
;
2203 nfs_sb_active(calldata
->inode
->i_sb
);
2205 msg
.rpc_argp
= &calldata
->arg
;
2206 msg
.rpc_resp
= &calldata
->res
;
2207 task_setup_data
.callback_data
= calldata
;
2208 task
= rpc_run_task(&task_setup_data
);
2210 return PTR_ERR(task
);
2213 status
= rpc_wait_for_completion_task(task
);
2220 pnfs_roc_release(state
->inode
);
2221 nfs4_put_open_state(state
);
2222 nfs4_put_state_owner(sp
);
2226 static struct inode
*
2227 nfs4_atomic_open(struct inode
*dir
, struct nfs_open_context
*ctx
, int open_flags
, struct iattr
*attr
)
2229 struct nfs4_state
*state
;
2231 /* Protect against concurrent sillydeletes */
2232 state
= nfs4_do_open(dir
, ctx
->dentry
, ctx
->mode
, open_flags
, attr
,
2233 ctx
->cred
, &ctx
->mdsthreshold
);
2235 return ERR_CAST(state
);
2237 return igrab(state
->inode
);
2240 static void nfs4_close_context(struct nfs_open_context
*ctx
, int is_sync
)
2242 if (ctx
->state
== NULL
)
2245 nfs4_close_sync(ctx
->state
, ctx
->mode
);
2247 nfs4_close_state(ctx
->state
, ctx
->mode
);
2250 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
2252 struct nfs4_server_caps_arg args
= {
2255 struct nfs4_server_caps_res res
= {};
2256 struct rpc_message msg
= {
2257 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
2263 status
= nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
2265 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
2266 server
->caps
&= ~(NFS_CAP_ACLS
|NFS_CAP_HARDLINKS
|
2267 NFS_CAP_SYMLINKS
|NFS_CAP_FILEID
|
2268 NFS_CAP_MODE
|NFS_CAP_NLINK
|NFS_CAP_OWNER
|
2269 NFS_CAP_OWNER_GROUP
|NFS_CAP_ATIME
|
2270 NFS_CAP_CTIME
|NFS_CAP_MTIME
);
2271 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
2272 server
->caps
|= NFS_CAP_ACLS
;
2273 if (res
.has_links
!= 0)
2274 server
->caps
|= NFS_CAP_HARDLINKS
;
2275 if (res
.has_symlinks
!= 0)
2276 server
->caps
|= NFS_CAP_SYMLINKS
;
2277 if (res
.attr_bitmask
[0] & FATTR4_WORD0_FILEID
)
2278 server
->caps
|= NFS_CAP_FILEID
;
2279 if (res
.attr_bitmask
[1] & FATTR4_WORD1_MODE
)
2280 server
->caps
|= NFS_CAP_MODE
;
2281 if (res
.attr_bitmask
[1] & FATTR4_WORD1_NUMLINKS
)
2282 server
->caps
|= NFS_CAP_NLINK
;
2283 if (res
.attr_bitmask
[1] & FATTR4_WORD1_OWNER
)
2284 server
->caps
|= NFS_CAP_OWNER
;
2285 if (res
.attr_bitmask
[1] & FATTR4_WORD1_OWNER_GROUP
)
2286 server
->caps
|= NFS_CAP_OWNER_GROUP
;
2287 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_ACCESS
)
2288 server
->caps
|= NFS_CAP_ATIME
;
2289 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_METADATA
)
2290 server
->caps
|= NFS_CAP_CTIME
;
2291 if (res
.attr_bitmask
[1] & FATTR4_WORD1_TIME_MODIFY
)
2292 server
->caps
|= NFS_CAP_MTIME
;
2294 memcpy(server
->cache_consistency_bitmask
, res
.attr_bitmask
, sizeof(server
->cache_consistency_bitmask
));
2295 server
->cache_consistency_bitmask
[0] &= FATTR4_WORD0_CHANGE
|FATTR4_WORD0_SIZE
;
2296 server
->cache_consistency_bitmask
[1] &= FATTR4_WORD1_TIME_METADATA
|FATTR4_WORD1_TIME_MODIFY
;
2297 server
->acl_bitmask
= res
.acl_bitmask
;
2298 server
->fh_expire_type
= res
.fh_expire_type
;
2304 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
2306 struct nfs4_exception exception
= { };
2309 err
= nfs4_handle_exception(server
,
2310 _nfs4_server_capabilities(server
, fhandle
),
2312 } while (exception
.retry
);
2316 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2317 struct nfs_fsinfo
*info
)
2319 struct nfs4_lookup_root_arg args
= {
2320 .bitmask
= nfs4_fattr_bitmap
,
2322 struct nfs4_lookup_res res
= {
2324 .fattr
= info
->fattr
,
2327 struct rpc_message msg
= {
2328 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
2333 nfs_fattr_init(info
->fattr
);
2334 return nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
2337 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2338 struct nfs_fsinfo
*info
)
2340 struct nfs4_exception exception
= { };
2343 err
= _nfs4_lookup_root(server
, fhandle
, info
);
2346 case -NFS4ERR_WRONGSEC
:
2349 err
= nfs4_handle_exception(server
, err
, &exception
);
2351 } while (exception
.retry
);
2356 static int nfs4_lookup_root_sec(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2357 struct nfs_fsinfo
*info
, rpc_authflavor_t flavor
)
2359 struct rpc_auth
*auth
;
2362 auth
= rpcauth_create(flavor
, server
->client
);
2367 ret
= nfs4_lookup_root(server
, fhandle
, info
);
2372 static int nfs4_find_root_sec(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2373 struct nfs_fsinfo
*info
)
2375 int i
, len
, status
= 0;
2376 rpc_authflavor_t flav_array
[NFS_MAX_SECFLAVORS
];
2378 len
= gss_mech_list_pseudoflavors(&flav_array
[0]);
2379 flav_array
[len
] = RPC_AUTH_NULL
;
2382 for (i
= 0; i
< len
; i
++) {
2383 status
= nfs4_lookup_root_sec(server
, fhandle
, info
, flav_array
[i
]);
2384 if (status
== -NFS4ERR_WRONGSEC
|| status
== -EACCES
)
2389 * -EACCESS could mean that the user doesn't have correct permissions
2390 * to access the mount. It could also mean that we tried to mount
2391 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2392 * existing mount programs don't handle -EACCES very well so it should
2393 * be mapped to -EPERM instead.
2395 if (status
== -EACCES
)
2401 * get the file handle for the "/" directory on the server
2403 int nfs4_proc_get_rootfh(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2404 struct nfs_fsinfo
*info
)
2406 int minor_version
= server
->nfs_client
->cl_minorversion
;
2407 int status
= nfs4_lookup_root(server
, fhandle
, info
);
2408 if ((status
== -NFS4ERR_WRONGSEC
) && !(server
->flags
& NFS_MOUNT_SECFLAVOUR
))
2410 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2411 * by nfs4_map_errors() as this function exits.
2413 status
= nfs_v4_minor_ops
[minor_version
]->find_root_sec(server
, fhandle
, info
);
2415 status
= nfs4_server_capabilities(server
, fhandle
);
2417 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
2418 return nfs4_map_errors(status
);
2421 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*mntfh
,
2422 struct nfs_fsinfo
*info
)
2425 struct nfs_fattr
*fattr
= info
->fattr
;
2427 error
= nfs4_server_capabilities(server
, mntfh
);
2429 dprintk("nfs4_get_root: getcaps error = %d\n", -error
);
2433 error
= nfs4_proc_getattr(server
, mntfh
, fattr
);
2435 dprintk("nfs4_get_root: getattr error = %d\n", -error
);
2439 if (fattr
->valid
& NFS_ATTR_FATTR_FSID
&&
2440 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
))
2441 memcpy(&server
->fsid
, &fattr
->fsid
, sizeof(server
->fsid
));
2447 * Get locations and (maybe) other attributes of a referral.
2448 * Note that we'll actually follow the referral later when
2449 * we detect fsid mismatch in inode revalidation
2451 static int nfs4_get_referral(struct rpc_clnt
*client
, struct inode
*dir
,
2452 const struct qstr
*name
, struct nfs_fattr
*fattr
,
2453 struct nfs_fh
*fhandle
)
2455 int status
= -ENOMEM
;
2456 struct page
*page
= NULL
;
2457 struct nfs4_fs_locations
*locations
= NULL
;
2459 page
= alloc_page(GFP_KERNEL
);
2462 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
2463 if (locations
== NULL
)
2466 status
= nfs4_proc_fs_locations(client
, dir
, name
, locations
, page
);
2469 /* Make sure server returned a different fsid for the referral */
2470 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
2471 dprintk("%s: server did not return a different fsid for"
2472 " a referral at %s\n", __func__
, name
->name
);
2476 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2477 nfs_fixup_referral_attributes(&locations
->fattr
);
2479 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2480 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
2481 memset(fhandle
, 0, sizeof(struct nfs_fh
));
2489 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2491 struct nfs4_getattr_arg args
= {
2493 .bitmask
= server
->attr_bitmask
,
2495 struct nfs4_getattr_res res
= {
2499 struct rpc_message msg
= {
2500 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
2505 nfs_fattr_init(fattr
);
2506 return nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
2509 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2511 struct nfs4_exception exception
= { };
2514 err
= nfs4_handle_exception(server
,
2515 _nfs4_proc_getattr(server
, fhandle
, fattr
),
2517 } while (exception
.retry
);
2522 * The file is not closed if it is opened due to the a request to change
2523 * the size of the file. The open call will not be needed once the
2524 * VFS layer lookup-intents are implemented.
2526 * Close is called when the inode is destroyed.
2527 * If we haven't opened the file for O_WRONLY, we
2528 * need to in the size_change case to obtain a stateid.
2531 * Because OPEN is always done by name in nfsv4, it is
2532 * possible that we opened a different file by the same
2533 * name. We can recognize this race condition, but we
2534 * can't do anything about it besides returning an error.
2536 * This will be fixed with VFS changes (lookup-intent).
2539 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
2540 struct iattr
*sattr
)
2542 struct inode
*inode
= dentry
->d_inode
;
2543 struct rpc_cred
*cred
= NULL
;
2544 struct nfs4_state
*state
= NULL
;
2547 if (pnfs_ld_layoutret_on_setattr(inode
))
2548 pnfs_return_layout(inode
);
2550 nfs_fattr_init(fattr
);
2552 /* Deal with open(O_TRUNC) */
2553 if (sattr
->ia_valid
& ATTR_OPEN
)
2554 sattr
->ia_valid
&= ~(ATTR_MTIME
|ATTR_CTIME
|ATTR_OPEN
);
2556 /* Optimization: if the end result is no change, don't RPC */
2557 if ((sattr
->ia_valid
& ~(ATTR_FILE
)) == 0)
2560 /* Search for an existing open(O_WRITE) file */
2561 if (sattr
->ia_valid
& ATTR_FILE
) {
2562 struct nfs_open_context
*ctx
;
2564 ctx
= nfs_file_open_context(sattr
->ia_file
);
2571 status
= nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
);
2573 nfs_setattr_update_inode(inode
, sattr
);
2577 static int _nfs4_proc_lookup(struct rpc_clnt
*clnt
, struct inode
*dir
,
2578 const struct qstr
*name
, struct nfs_fh
*fhandle
,
2579 struct nfs_fattr
*fattr
)
2581 struct nfs_server
*server
= NFS_SERVER(dir
);
2583 struct nfs4_lookup_arg args
= {
2584 .bitmask
= server
->attr_bitmask
,
2585 .dir_fh
= NFS_FH(dir
),
2588 struct nfs4_lookup_res res
= {
2593 struct rpc_message msg
= {
2594 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
2599 nfs_fattr_init(fattr
);
2601 dprintk("NFS call lookup %s\n", name
->name
);
2602 status
= nfs4_call_sync(clnt
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
2603 dprintk("NFS reply lookup: %d\n", status
);
2607 static void nfs_fixup_secinfo_attributes(struct nfs_fattr
*fattr
)
2609 fattr
->valid
|= NFS_ATTR_FATTR_TYPE
| NFS_ATTR_FATTR_MODE
|
2610 NFS_ATTR_FATTR_NLINK
| NFS_ATTR_FATTR_MOUNTPOINT
;
2611 fattr
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
2615 static int nfs4_proc_lookup_common(struct rpc_clnt
**clnt
, struct inode
*dir
,
2616 struct qstr
*name
, struct nfs_fh
*fhandle
,
2617 struct nfs_fattr
*fattr
)
2619 struct nfs4_exception exception
= { };
2620 struct rpc_clnt
*client
= *clnt
;
2623 err
= _nfs4_proc_lookup(client
, dir
, name
, fhandle
, fattr
);
2625 case -NFS4ERR_BADNAME
:
2628 case -NFS4ERR_MOVED
:
2629 err
= nfs4_get_referral(client
, dir
, name
, fattr
, fhandle
);
2631 case -NFS4ERR_WRONGSEC
:
2633 if (client
!= *clnt
)
2636 client
= nfs4_create_sec_client(client
, dir
, name
);
2638 return PTR_ERR(client
);
2640 exception
.retry
= 1;
2643 err
= nfs4_handle_exception(NFS_SERVER(dir
), err
, &exception
);
2645 } while (exception
.retry
);
2650 else if (client
!= *clnt
)
2651 rpc_shutdown_client(client
);
2656 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
,
2657 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2660 struct rpc_clnt
*client
= NFS_CLIENT(dir
);
2662 status
= nfs4_proc_lookup_common(&client
, dir
, name
, fhandle
, fattr
);
2663 if (client
!= NFS_CLIENT(dir
)) {
2664 rpc_shutdown_client(client
);
2665 nfs_fixup_secinfo_attributes(fattr
);
2671 nfs4_proc_lookup_mountpoint(struct inode
*dir
, struct qstr
*name
,
2672 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2675 struct rpc_clnt
*client
= rpc_clone_client(NFS_CLIENT(dir
));
2677 status
= nfs4_proc_lookup_common(&client
, dir
, name
, fhandle
, fattr
);
2679 rpc_shutdown_client(client
);
2680 return ERR_PTR(status
);
2685 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
2687 struct nfs_server
*server
= NFS_SERVER(inode
);
2688 struct nfs4_accessargs args
= {
2689 .fh
= NFS_FH(inode
),
2690 .bitmask
= server
->cache_consistency_bitmask
,
2692 struct nfs4_accessres res
= {
2695 struct rpc_message msg
= {
2696 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
2699 .rpc_cred
= entry
->cred
,
2701 int mode
= entry
->mask
;
2705 * Determine which access bits we want to ask for...
2707 if (mode
& MAY_READ
)
2708 args
.access
|= NFS4_ACCESS_READ
;
2709 if (S_ISDIR(inode
->i_mode
)) {
2710 if (mode
& MAY_WRITE
)
2711 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
2712 if (mode
& MAY_EXEC
)
2713 args
.access
|= NFS4_ACCESS_LOOKUP
;
2715 if (mode
& MAY_WRITE
)
2716 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
2717 if (mode
& MAY_EXEC
)
2718 args
.access
|= NFS4_ACCESS_EXECUTE
;
2721 res
.fattr
= nfs_alloc_fattr();
2722 if (res
.fattr
== NULL
)
2725 status
= nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
2728 if (res
.access
& NFS4_ACCESS_READ
)
2729 entry
->mask
|= MAY_READ
;
2730 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
2731 entry
->mask
|= MAY_WRITE
;
2732 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
2733 entry
->mask
|= MAY_EXEC
;
2734 nfs_refresh_inode(inode
, res
.fattr
);
2736 nfs_free_fattr(res
.fattr
);
2740 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
2742 struct nfs4_exception exception
= { };
2745 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2746 _nfs4_proc_access(inode
, entry
),
2748 } while (exception
.retry
);
2753 * TODO: For the time being, we don't try to get any attributes
2754 * along with any of the zero-copy operations READ, READDIR,
2757 * In the case of the first three, we want to put the GETATTR
2758 * after the read-type operation -- this is because it is hard
2759 * to predict the length of a GETATTR response in v4, and thus
2760 * align the READ data correctly. This means that the GETATTR
2761 * may end up partially falling into the page cache, and we should
2762 * shift it into the 'tail' of the xdr_buf before processing.
2763 * To do this efficiently, we need to know the total length
2764 * of data received, which doesn't seem to be available outside
2767 * In the case of WRITE, we also want to put the GETATTR after
2768 * the operation -- in this case because we want to make sure
2769 * we get the post-operation mtime and size. This means that
2770 * we can't use xdr_encode_pages() as written: we need a variant
2771 * of it which would leave room in the 'tail' iovec.
2773 * Both of these changes to the XDR layer would in fact be quite
2774 * minor, but I decided to leave them for a subsequent patch.
2776 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2777 unsigned int pgbase
, unsigned int pglen
)
2779 struct nfs4_readlink args
= {
2780 .fh
= NFS_FH(inode
),
2785 struct nfs4_readlink_res res
;
2786 struct rpc_message msg
= {
2787 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
2792 return nfs4_call_sync(NFS_SERVER(inode
)->client
, NFS_SERVER(inode
), &msg
, &args
.seq_args
, &res
.seq_res
, 0);
2795 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2796 unsigned int pgbase
, unsigned int pglen
)
2798 struct nfs4_exception exception
= { };
2801 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2802 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
2804 } while (exception
.retry
);
2810 * We will need to arrange for the VFS layer to provide an atomic open.
2811 * Until then, this create/open method is prone to inefficiency and race
2812 * conditions due to the lookup, create, and open VFS calls from sys_open()
2813 * placed on the wire.
2815 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2816 * The file will be opened again in the subsequent VFS open call
2817 * (nfs4_proc_file_open).
2819 * The open for read will just hang around to be used by any process that
2820 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2824 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
2825 int flags
, struct nfs_open_context
*ctx
)
2827 struct dentry
*de
= dentry
;
2828 struct nfs4_state
*state
;
2829 struct rpc_cred
*cred
= NULL
;
2838 sattr
->ia_mode
&= ~current_umask();
2839 state
= nfs4_do_open(dir
, de
, fmode
, flags
, sattr
, cred
, NULL
);
2841 if (IS_ERR(state
)) {
2842 status
= PTR_ERR(state
);
2845 d_add(dentry
, igrab(state
->inode
));
2846 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2850 nfs4_close_sync(state
, fmode
);
2855 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2857 struct nfs_server
*server
= NFS_SERVER(dir
);
2858 struct nfs_removeargs args
= {
2862 struct nfs_removeres res
= {
2865 struct rpc_message msg
= {
2866 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
2872 status
= nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 1);
2874 update_changeattr(dir
, &res
.cinfo
);
2878 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2880 struct nfs4_exception exception
= { };
2883 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2884 _nfs4_proc_remove(dir
, name
),
2886 } while (exception
.retry
);
2890 static void nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct inode
*dir
)
2892 struct nfs_server
*server
= NFS_SERVER(dir
);
2893 struct nfs_removeargs
*args
= msg
->rpc_argp
;
2894 struct nfs_removeres
*res
= msg
->rpc_resp
;
2896 res
->server
= server
;
2897 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
2898 nfs41_init_sequence(&args
->seq_args
, &res
->seq_res
, 1);
2901 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task
*task
, struct nfs_unlinkdata
*data
)
2903 if (nfs4_setup_sequence(NFS_SERVER(data
->dir
),
2904 &data
->args
.seq_args
,
2908 rpc_call_start(task
);
2911 static int nfs4_proc_unlink_done(struct rpc_task
*task
, struct inode
*dir
)
2913 struct nfs_removeres
*res
= task
->tk_msg
.rpc_resp
;
2915 if (!nfs4_sequence_done(task
, &res
->seq_res
))
2917 if (nfs4_async_handle_error(task
, res
->server
, NULL
) == -EAGAIN
)
2919 update_changeattr(dir
, &res
->cinfo
);
2923 static void nfs4_proc_rename_setup(struct rpc_message
*msg
, struct inode
*dir
)
2925 struct nfs_server
*server
= NFS_SERVER(dir
);
2926 struct nfs_renameargs
*arg
= msg
->rpc_argp
;
2927 struct nfs_renameres
*res
= msg
->rpc_resp
;
2929 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
];
2930 res
->server
= server
;
2931 nfs41_init_sequence(&arg
->seq_args
, &res
->seq_res
, 1);
2934 static void nfs4_proc_rename_rpc_prepare(struct rpc_task
*task
, struct nfs_renamedata
*data
)
2936 if (nfs4_setup_sequence(NFS_SERVER(data
->old_dir
),
2937 &data
->args
.seq_args
,
2941 rpc_call_start(task
);
2944 static int nfs4_proc_rename_done(struct rpc_task
*task
, struct inode
*old_dir
,
2945 struct inode
*new_dir
)
2947 struct nfs_renameres
*res
= task
->tk_msg
.rpc_resp
;
2949 if (!nfs4_sequence_done(task
, &res
->seq_res
))
2951 if (nfs4_async_handle_error(task
, res
->server
, NULL
) == -EAGAIN
)
2954 update_changeattr(old_dir
, &res
->old_cinfo
);
2955 update_changeattr(new_dir
, &res
->new_cinfo
);
2959 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2960 struct inode
*new_dir
, struct qstr
*new_name
)
2962 struct nfs_server
*server
= NFS_SERVER(old_dir
);
2963 struct nfs_renameargs arg
= {
2964 .old_dir
= NFS_FH(old_dir
),
2965 .new_dir
= NFS_FH(new_dir
),
2966 .old_name
= old_name
,
2967 .new_name
= new_name
,
2969 struct nfs_renameres res
= {
2972 struct rpc_message msg
= {
2973 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2977 int status
= -ENOMEM
;
2979 status
= nfs4_call_sync(server
->client
, server
, &msg
, &arg
.seq_args
, &res
.seq_res
, 1);
2981 update_changeattr(old_dir
, &res
.old_cinfo
);
2982 update_changeattr(new_dir
, &res
.new_cinfo
);
2987 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2988 struct inode
*new_dir
, struct qstr
*new_name
)
2990 struct nfs4_exception exception
= { };
2993 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2994 _nfs4_proc_rename(old_dir
, old_name
,
2997 } while (exception
.retry
);
3001 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
3003 struct nfs_server
*server
= NFS_SERVER(inode
);
3004 struct nfs4_link_arg arg
= {
3005 .fh
= NFS_FH(inode
),
3006 .dir_fh
= NFS_FH(dir
),
3008 .bitmask
= server
->attr_bitmask
,
3010 struct nfs4_link_res res
= {
3013 struct rpc_message msg
= {
3014 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
3018 int status
= -ENOMEM
;
3020 res
.fattr
= nfs_alloc_fattr();
3021 if (res
.fattr
== NULL
)
3024 status
= nfs4_call_sync(server
->client
, server
, &msg
, &arg
.seq_args
, &res
.seq_res
, 1);
3026 update_changeattr(dir
, &res
.cinfo
);
3027 nfs_post_op_update_inode(inode
, res
.fattr
);
3030 nfs_free_fattr(res
.fattr
);
3034 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
3036 struct nfs4_exception exception
= { };
3039 err
= nfs4_handle_exception(NFS_SERVER(inode
),
3040 _nfs4_proc_link(inode
, dir
, name
),
3042 } while (exception
.retry
);
3046 struct nfs4_createdata
{
3047 struct rpc_message msg
;
3048 struct nfs4_create_arg arg
;
3049 struct nfs4_create_res res
;
3051 struct nfs_fattr fattr
;
3054 static struct nfs4_createdata
*nfs4_alloc_createdata(struct inode
*dir
,
3055 struct qstr
*name
, struct iattr
*sattr
, u32 ftype
)
3057 struct nfs4_createdata
*data
;
3059 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
3061 struct nfs_server
*server
= NFS_SERVER(dir
);
3063 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
];
3064 data
->msg
.rpc_argp
= &data
->arg
;
3065 data
->msg
.rpc_resp
= &data
->res
;
3066 data
->arg
.dir_fh
= NFS_FH(dir
);
3067 data
->arg
.server
= server
;
3068 data
->arg
.name
= name
;
3069 data
->arg
.attrs
= sattr
;
3070 data
->arg
.ftype
= ftype
;
3071 data
->arg
.bitmask
= server
->attr_bitmask
;
3072 data
->res
.server
= server
;
3073 data
->res
.fh
= &data
->fh
;
3074 data
->res
.fattr
= &data
->fattr
;
3075 nfs_fattr_init(data
->res
.fattr
);
3080 static int nfs4_do_create(struct inode
*dir
, struct dentry
*dentry
, struct nfs4_createdata
*data
)
3082 int status
= nfs4_call_sync(NFS_SERVER(dir
)->client
, NFS_SERVER(dir
), &data
->msg
,
3083 &data
->arg
.seq_args
, &data
->res
.seq_res
, 1);
3085 update_changeattr(dir
, &data
->res
.dir_cinfo
);
3086 status
= nfs_instantiate(dentry
, data
->res
.fh
, data
->res
.fattr
);
3091 static void nfs4_free_createdata(struct nfs4_createdata
*data
)
3096 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
3097 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
3099 struct nfs4_createdata
*data
;
3100 int status
= -ENAMETOOLONG
;
3102 if (len
> NFS4_MAXPATHLEN
)
3106 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4LNK
);
3110 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
];
3111 data
->arg
.u
.symlink
.pages
= &page
;
3112 data
->arg
.u
.symlink
.len
= len
;
3114 status
= nfs4_do_create(dir
, dentry
, data
);
3116 nfs4_free_createdata(data
);
3121 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
3122 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
3124 struct nfs4_exception exception
= { };
3127 err
= nfs4_handle_exception(NFS_SERVER(dir
),
3128 _nfs4_proc_symlink(dir
, dentry
, page
,
3131 } while (exception
.retry
);
3135 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
3136 struct iattr
*sattr
)
3138 struct nfs4_createdata
*data
;
3139 int status
= -ENOMEM
;
3141 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4DIR
);
3145 status
= nfs4_do_create(dir
, dentry
, data
);
3147 nfs4_free_createdata(data
);
3152 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
3153 struct iattr
*sattr
)
3155 struct nfs4_exception exception
= { };
3158 sattr
->ia_mode
&= ~current_umask();
3160 err
= nfs4_handle_exception(NFS_SERVER(dir
),
3161 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
3163 } while (exception
.retry
);
3167 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
3168 u64 cookie
, struct page
**pages
, unsigned int count
, int plus
)
3170 struct inode
*dir
= dentry
->d_inode
;
3171 struct nfs4_readdir_arg args
= {
3176 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
3179 struct nfs4_readdir_res res
;
3180 struct rpc_message msg
= {
3181 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
3188 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__
,
3189 dentry
->d_parent
->d_name
.name
,
3190 dentry
->d_name
.name
,
3191 (unsigned long long)cookie
);
3192 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
3193 res
.pgbase
= args
.pgbase
;
3194 status
= nfs4_call_sync(NFS_SERVER(dir
)->client
, NFS_SERVER(dir
), &msg
, &args
.seq_args
, &res
.seq_res
, 0);
3196 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
3197 status
+= args
.pgbase
;
3200 nfs_invalidate_atime(dir
);
3202 dprintk("%s: returns %d\n", __func__
, status
);
3206 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
3207 u64 cookie
, struct page
**pages
, unsigned int count
, int plus
)
3209 struct nfs4_exception exception
= { };
3212 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
3213 _nfs4_proc_readdir(dentry
, cred
, cookie
,
3214 pages
, count
, plus
),
3216 } while (exception
.retry
);
3220 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
3221 struct iattr
*sattr
, dev_t rdev
)
3223 struct nfs4_createdata
*data
;
3224 int mode
= sattr
->ia_mode
;
3225 int status
= -ENOMEM
;
3227 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
3228 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
3230 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4SOCK
);
3235 data
->arg
.ftype
= NF4FIFO
;
3236 else if (S_ISBLK(mode
)) {
3237 data
->arg
.ftype
= NF4BLK
;
3238 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
3239 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
3241 else if (S_ISCHR(mode
)) {
3242 data
->arg
.ftype
= NF4CHR
;
3243 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
3244 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
3247 status
= nfs4_do_create(dir
, dentry
, data
);
3249 nfs4_free_createdata(data
);
3254 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
3255 struct iattr
*sattr
, dev_t rdev
)
3257 struct nfs4_exception exception
= { };
3260 sattr
->ia_mode
&= ~current_umask();
3262 err
= nfs4_handle_exception(NFS_SERVER(dir
),
3263 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
3265 } while (exception
.retry
);
3269 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3270 struct nfs_fsstat
*fsstat
)
3272 struct nfs4_statfs_arg args
= {
3274 .bitmask
= server
->attr_bitmask
,
3276 struct nfs4_statfs_res res
= {
3279 struct rpc_message msg
= {
3280 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
3285 nfs_fattr_init(fsstat
->fattr
);
3286 return nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
3289 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
3291 struct nfs4_exception exception
= { };
3294 err
= nfs4_handle_exception(server
,
3295 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
3297 } while (exception
.retry
);
3301 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3302 struct nfs_fsinfo
*fsinfo
)
3304 struct nfs4_fsinfo_arg args
= {
3306 .bitmask
= server
->attr_bitmask
,
3308 struct nfs4_fsinfo_res res
= {
3311 struct rpc_message msg
= {
3312 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
3317 return nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
3320 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
3322 struct nfs4_exception exception
= { };
3326 err
= nfs4_handle_exception(server
,
3327 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
3329 } while (exception
.retry
);
3333 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
3335 nfs_fattr_init(fsinfo
->fattr
);
3336 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
3339 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3340 struct nfs_pathconf
*pathconf
)
3342 struct nfs4_pathconf_arg args
= {
3344 .bitmask
= server
->attr_bitmask
,
3346 struct nfs4_pathconf_res res
= {
3347 .pathconf
= pathconf
,
3349 struct rpc_message msg
= {
3350 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
3355 /* None of the pathconf attributes are mandatory to implement */
3356 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
3357 memset(pathconf
, 0, sizeof(*pathconf
));
3361 nfs_fattr_init(pathconf
->fattr
);
3362 return nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
3365 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
3366 struct nfs_pathconf
*pathconf
)
3368 struct nfs4_exception exception
= { };
3372 err
= nfs4_handle_exception(server
,
3373 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
3375 } while (exception
.retry
);
3379 void __nfs4_read_done_cb(struct nfs_read_data
*data
)
3381 nfs_invalidate_atime(data
->header
->inode
);
3384 static int nfs4_read_done_cb(struct rpc_task
*task
, struct nfs_read_data
*data
)
3386 struct nfs_server
*server
= NFS_SERVER(data
->header
->inode
);
3388 if (nfs4_async_handle_error(task
, server
, data
->args
.context
->state
) == -EAGAIN
) {
3389 rpc_restart_call_prepare(task
);
3393 __nfs4_read_done_cb(data
);
3394 if (task
->tk_status
> 0)
3395 renew_lease(server
, data
->timestamp
);
3399 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
3402 dprintk("--> %s\n", __func__
);
3404 if (!nfs4_sequence_done(task
, &data
->res
.seq_res
))
3407 return data
->read_done_cb
? data
->read_done_cb(task
, data
) :
3408 nfs4_read_done_cb(task
, data
);
3411 static void nfs4_proc_read_setup(struct nfs_read_data
*data
, struct rpc_message
*msg
)
3413 data
->timestamp
= jiffies
;
3414 data
->read_done_cb
= nfs4_read_done_cb
;
3415 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
];
3416 nfs41_init_sequence(&data
->args
.seq_args
, &data
->res
.seq_res
, 0);
3419 static void nfs4_proc_read_rpc_prepare(struct rpc_task
*task
, struct nfs_read_data
*data
)
3421 if (nfs4_setup_sequence(NFS_SERVER(data
->header
->inode
),
3422 &data
->args
.seq_args
,
3426 rpc_call_start(task
);
3429 static int nfs4_write_done_cb(struct rpc_task
*task
, struct nfs_write_data
*data
)
3431 struct inode
*inode
= data
->header
->inode
;
3433 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), data
->args
.context
->state
) == -EAGAIN
) {
3434 rpc_restart_call_prepare(task
);
3437 if (task
->tk_status
>= 0) {
3438 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
3439 nfs_post_op_update_inode_force_wcc(inode
, &data
->fattr
);
3444 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
3446 if (!nfs4_sequence_done(task
, &data
->res
.seq_res
))
3448 return data
->write_done_cb
? data
->write_done_cb(task
, data
) :
3449 nfs4_write_done_cb(task
, data
);
3453 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data
*data
)
3455 const struct nfs_pgio_header
*hdr
= data
->header
;
3457 /* Don't request attributes for pNFS or O_DIRECT writes */
3458 if (data
->ds_clp
!= NULL
|| hdr
->dreq
!= NULL
)
3460 /* Otherwise, request attributes if and only if we don't hold
3463 return nfs_have_delegation(hdr
->inode
, FMODE_READ
) == 0;
3466 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
3468 struct nfs_server
*server
= NFS_SERVER(data
->header
->inode
);
3470 if (!nfs4_write_need_cache_consistency_data(data
)) {
3471 data
->args
.bitmask
= NULL
;
3472 data
->res
.fattr
= NULL
;
3474 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
3476 if (!data
->write_done_cb
)
3477 data
->write_done_cb
= nfs4_write_done_cb
;
3478 data
->res
.server
= server
;
3479 data
->timestamp
= jiffies
;
3481 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
];
3482 nfs41_init_sequence(&data
->args
.seq_args
, &data
->res
.seq_res
, 1);
3485 static void nfs4_proc_write_rpc_prepare(struct rpc_task
*task
, struct nfs_write_data
*data
)
3487 if (nfs4_setup_sequence(NFS_SERVER(data
->header
->inode
),
3488 &data
->args
.seq_args
,
3492 rpc_call_start(task
);
3495 static void nfs4_proc_commit_rpc_prepare(struct rpc_task
*task
, struct nfs_commit_data
*data
)
3497 if (nfs4_setup_sequence(NFS_SERVER(data
->inode
),
3498 &data
->args
.seq_args
,
3502 rpc_call_start(task
);
3505 static int nfs4_commit_done_cb(struct rpc_task
*task
, struct nfs_commit_data
*data
)
3507 struct inode
*inode
= data
->inode
;
3509 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), NULL
) == -EAGAIN
) {
3510 rpc_restart_call_prepare(task
);
3516 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_commit_data
*data
)
3518 if (!nfs4_sequence_done(task
, &data
->res
.seq_res
))
3520 return data
->commit_done_cb(task
, data
);
3523 static void nfs4_proc_commit_setup(struct nfs_commit_data
*data
, struct rpc_message
*msg
)
3525 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
3527 if (data
->commit_done_cb
== NULL
)
3528 data
->commit_done_cb
= nfs4_commit_done_cb
;
3529 data
->res
.server
= server
;
3530 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
];
3531 nfs41_init_sequence(&data
->args
.seq_args
, &data
->res
.seq_res
, 1);
3534 struct nfs4_renewdata
{
3535 struct nfs_client
*client
;
3536 unsigned long timestamp
;
3540 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3541 * standalone procedure for queueing an asynchronous RENEW.
3543 static void nfs4_renew_release(void *calldata
)
3545 struct nfs4_renewdata
*data
= calldata
;
3546 struct nfs_client
*clp
= data
->client
;
3548 if (atomic_read(&clp
->cl_count
) > 1)
3549 nfs4_schedule_state_renewal(clp
);
3550 nfs_put_client(clp
);
3554 static void nfs4_renew_done(struct rpc_task
*task
, void *calldata
)
3556 struct nfs4_renewdata
*data
= calldata
;
3557 struct nfs_client
*clp
= data
->client
;
3558 unsigned long timestamp
= data
->timestamp
;
3560 if (task
->tk_status
< 0) {
3561 /* Unless we're shutting down, schedule state recovery! */
3562 if (test_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
) == 0)
3564 if (task
->tk_status
!= NFS4ERR_CB_PATH_DOWN
) {
3565 nfs4_schedule_lease_recovery(clp
);
3568 nfs4_schedule_path_down_recovery(clp
);
3570 do_renew_lease(clp
, timestamp
);
3573 static const struct rpc_call_ops nfs4_renew_ops
= {
3574 .rpc_call_done
= nfs4_renew_done
,
3575 .rpc_release
= nfs4_renew_release
,
3578 static int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
, unsigned renew_flags
)
3580 struct rpc_message msg
= {
3581 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
3585 struct nfs4_renewdata
*data
;
3587 if (renew_flags
== 0)
3589 if (!atomic_inc_not_zero(&clp
->cl_count
))
3591 data
= kmalloc(sizeof(*data
), GFP_NOFS
);
3595 data
->timestamp
= jiffies
;
3596 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
3597 &nfs4_renew_ops
, data
);
3600 static int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3602 struct rpc_message msg
= {
3603 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
3607 unsigned long now
= jiffies
;
3610 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3613 do_renew_lease(clp
, now
);
3617 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
3619 return (server
->caps
& NFS_CAP_ACLS
)
3620 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
3621 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
3624 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3625 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3628 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3630 static int buf_to_pages_noslab(const void *buf
, size_t buflen
,
3631 struct page
**pages
, unsigned int *pgbase
)
3633 struct page
*newpage
, **spages
;
3639 len
= min_t(size_t, PAGE_CACHE_SIZE
, buflen
);
3640 newpage
= alloc_page(GFP_KERNEL
);
3642 if (newpage
== NULL
)
3644 memcpy(page_address(newpage
), buf
, len
);
3649 } while (buflen
!= 0);
3655 __free_page(spages
[rc
-1]);
3659 struct nfs4_cached_acl
{
3665 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
3667 struct nfs_inode
*nfsi
= NFS_I(inode
);
3669 spin_lock(&inode
->i_lock
);
3670 kfree(nfsi
->nfs4_acl
);
3671 nfsi
->nfs4_acl
= acl
;
3672 spin_unlock(&inode
->i_lock
);
3675 static void nfs4_zap_acl_attr(struct inode
*inode
)
3677 nfs4_set_cached_acl(inode
, NULL
);
3680 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
3682 struct nfs_inode
*nfsi
= NFS_I(inode
);
3683 struct nfs4_cached_acl
*acl
;
3686 spin_lock(&inode
->i_lock
);
3687 acl
= nfsi
->nfs4_acl
;
3690 if (buf
== NULL
) /* user is just asking for length */
3692 if (acl
->cached
== 0)
3694 ret
= -ERANGE
; /* see getxattr(2) man page */
3695 if (acl
->len
> buflen
)
3697 memcpy(buf
, acl
->data
, acl
->len
);
3701 spin_unlock(&inode
->i_lock
);
3705 static void nfs4_write_cached_acl(struct inode
*inode
, struct page
**pages
, size_t pgbase
, size_t acl_len
)
3707 struct nfs4_cached_acl
*acl
;
3709 if (pages
&& acl_len
<= PAGE_SIZE
) {
3710 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
3714 _copy_from_pages(acl
->data
, pages
, pgbase
, acl_len
);
3716 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
3723 nfs4_set_cached_acl(inode
, acl
);
3727 * The getxattr API returns the required buffer length when called with a
3728 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3729 * the required buf. On a NULL buf, we send a page of data to the server
3730 * guessing that the ACL request can be serviced by a page. If so, we cache
3731 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3732 * the cache. If not so, we throw away the page, and cache the required
3733 * length. The next getxattr call will then produce another round trip to
3734 * the server, this time with the input buf of the required size.
3736 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3738 struct page
*pages
[NFS4ACL_MAXPAGES
] = {NULL
, };
3739 struct nfs_getaclargs args
= {
3740 .fh
= NFS_FH(inode
),
3744 struct nfs_getaclres res
= {
3747 struct rpc_message msg
= {
3748 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
3752 int ret
= -ENOMEM
, npages
, i
, acl_len
= 0;
3754 npages
= (buflen
+ PAGE_SIZE
- 1) >> PAGE_SHIFT
;
3755 /* As long as we're doing a round trip to the server anyway,
3756 * let's be prepared for a page of acl data. */
3760 /* Add an extra page to handle the bitmap returned */
3763 for (i
= 0; i
< npages
; i
++) {
3764 pages
[i
] = alloc_page(GFP_KERNEL
);
3769 /* for decoding across pages */
3770 res
.acl_scratch
= alloc_page(GFP_KERNEL
);
3771 if (!res
.acl_scratch
)
3774 args
.acl_len
= npages
* PAGE_SIZE
;
3775 args
.acl_pgbase
= 0;
3777 /* Let decode_getfacl know not to fail if the ACL data is larger than
3778 * the page we send as a guess */
3780 res
.acl_flags
|= NFS4_ACL_LEN_REQUEST
;
3782 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3783 __func__
, buf
, buflen
, npages
, args
.acl_len
);
3784 ret
= nfs4_call_sync(NFS_SERVER(inode
)->client
, NFS_SERVER(inode
),
3785 &msg
, &args
.seq_args
, &res
.seq_res
, 0);
3789 acl_len
= res
.acl_len
- res
.acl_data_offset
;
3790 if (acl_len
> args
.acl_len
)
3791 nfs4_write_cached_acl(inode
, NULL
, 0, acl_len
);
3793 nfs4_write_cached_acl(inode
, pages
, res
.acl_data_offset
,
3797 if (acl_len
> buflen
)
3799 _copy_from_pages(buf
, pages
, res
.acl_data_offset
,
3804 for (i
= 0; i
< npages
; i
++)
3806 __free_page(pages
[i
]);
3807 if (res
.acl_scratch
)
3808 __free_page(res
.acl_scratch
);
3812 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3814 struct nfs4_exception exception
= { };
3817 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
3820 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
3821 } while (exception
.retry
);
3825 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
3827 struct nfs_server
*server
= NFS_SERVER(inode
);
3830 if (!nfs4_server_supports_acls(server
))
3832 ret
= nfs_revalidate_inode(server
, inode
);
3835 if (NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ACL
)
3836 nfs_zap_acl_cache(inode
);
3837 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
3839 /* -ENOENT is returned if there is no ACL or if there is an ACL
3840 * but no cached acl data, just the acl length */
3842 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
3845 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3847 struct nfs_server
*server
= NFS_SERVER(inode
);
3848 struct page
*pages
[NFS4ACL_MAXPAGES
];
3849 struct nfs_setaclargs arg
= {
3850 .fh
= NFS_FH(inode
),
3854 struct nfs_setaclres res
;
3855 struct rpc_message msg
= {
3856 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
3862 if (!nfs4_server_supports_acls(server
))
3864 i
= buf_to_pages_noslab(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
3867 nfs_inode_return_delegation(inode
);
3868 ret
= nfs4_call_sync(server
->client
, server
, &msg
, &arg
.seq_args
, &res
.seq_res
, 1);
3871 * Free each page after tx, so the only ref left is
3872 * held by the network stack
3875 put_page(pages
[i
-1]);
3878 * Acl update can result in inode attribute update.
3879 * so mark the attribute cache invalid.
3881 spin_lock(&inode
->i_lock
);
3882 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ATTR
;
3883 spin_unlock(&inode
->i_lock
);
3884 nfs_access_zap_cache(inode
);
3885 nfs_zap_acl_cache(inode
);
3889 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3891 struct nfs4_exception exception
= { };
3894 err
= nfs4_handle_exception(NFS_SERVER(inode
),
3895 __nfs4_proc_set_acl(inode
, buf
, buflen
),
3897 } while (exception
.retry
);
3902 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs4_state
*state
)
3904 struct nfs_client
*clp
= server
->nfs_client
;
3906 if (task
->tk_status
>= 0)
3908 switch(task
->tk_status
) {
3909 case -NFS4ERR_DELEG_REVOKED
:
3910 case -NFS4ERR_ADMIN_REVOKED
:
3911 case -NFS4ERR_BAD_STATEID
:
3914 nfs_remove_bad_delegation(state
->inode
);
3915 case -NFS4ERR_OPENMODE
:
3918 nfs4_schedule_stateid_recovery(server
, state
);
3919 goto wait_on_recovery
;
3920 case -NFS4ERR_EXPIRED
:
3922 nfs4_schedule_stateid_recovery(server
, state
);
3923 case -NFS4ERR_STALE_STATEID
:
3924 case -NFS4ERR_STALE_CLIENTID
:
3925 nfs4_schedule_lease_recovery(clp
);
3926 goto wait_on_recovery
;
3927 #if defined(CONFIG_NFS_V4_1)
3928 case -NFS4ERR_BADSESSION
:
3929 case -NFS4ERR_BADSLOT
:
3930 case -NFS4ERR_BAD_HIGH_SLOT
:
3931 case -NFS4ERR_DEADSESSION
:
3932 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
3933 case -NFS4ERR_SEQ_FALSE_RETRY
:
3934 case -NFS4ERR_SEQ_MISORDERED
:
3935 dprintk("%s ERROR %d, Reset session\n", __func__
,
3937 nfs4_schedule_session_recovery(clp
->cl_session
, task
->tk_status
);
3938 task
->tk_status
= 0;
3940 #endif /* CONFIG_NFS_V4_1 */
3941 case -NFS4ERR_DELAY
:
3942 nfs_inc_server_stats(server
, NFSIOS_DELAY
);
3943 case -NFS4ERR_GRACE
:
3945 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
3946 task
->tk_status
= 0;
3948 case -NFS4ERR_RETRY_UNCACHED_REP
:
3949 case -NFS4ERR_OLD_STATEID
:
3950 task
->tk_status
= 0;
3953 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
3956 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
);
3957 if (test_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) == 0)
3958 rpc_wake_up_queued_task(&clp
->cl_rpcwaitq
, task
);
3959 task
->tk_status
= 0;
3963 static void nfs4_init_boot_verifier(const struct nfs_client
*clp
,
3964 nfs4_verifier
*bootverf
)
3968 if (test_bit(NFS4CLNT_PURGE_STATE
, &clp
->cl_state
)) {
3969 /* An impossible timestamp guarantees this value
3970 * will never match a generated boot time. */
3972 verf
[1] = (__be32
)(NSEC_PER_SEC
+ 1);
3974 struct nfs_net
*nn
= net_generic(clp
->cl_net
, nfs_net_id
);
3975 verf
[0] = (__be32
)nn
->boot_time
.tv_sec
;
3976 verf
[1] = (__be32
)nn
->boot_time
.tv_nsec
;
3978 memcpy(bootverf
->data
, verf
, sizeof(bootverf
->data
));
3981 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
,
3982 unsigned short port
, struct rpc_cred
*cred
,
3983 struct nfs4_setclientid_res
*res
)
3985 nfs4_verifier sc_verifier
;
3986 struct nfs4_setclientid setclientid
= {
3987 .sc_verifier
= &sc_verifier
,
3989 .sc_cb_ident
= clp
->cl_cb_ident
,
3991 struct rpc_message msg
= {
3992 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
3993 .rpc_argp
= &setclientid
,
4000 nfs4_init_boot_verifier(clp
, &sc_verifier
);
4004 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
4005 sizeof(setclientid
.sc_name
), "%s/%s %s %s %u",
4007 rpc_peeraddr2str(clp
->cl_rpcclient
,
4009 rpc_peeraddr2str(clp
->cl_rpcclient
,
4011 clp
->cl_rpcclient
->cl_auth
->au_ops
->au_name
,
4012 clp
->cl_id_uniquifier
);
4013 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
4014 sizeof(setclientid
.sc_netid
),
4015 rpc_peeraddr2str(clp
->cl_rpcclient
,
4016 RPC_DISPLAY_NETID
));
4017 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
4018 sizeof(setclientid
.sc_uaddr
), "%s.%u.%u",
4019 clp
->cl_ipaddr
, port
>> 8, port
& 255);
4022 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, RPC_TASK_TIMEOUT
);
4023 if (status
!= -NFS4ERR_CLID_INUSE
)
4026 ++clp
->cl_id_uniquifier
;
4030 ssleep(clp
->cl_lease_time
/ HZ
+ 1);
4035 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
,
4036 struct nfs4_setclientid_res
*arg
,
4037 struct rpc_cred
*cred
)
4039 struct nfs_fsinfo fsinfo
;
4040 struct rpc_message msg
= {
4041 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
4043 .rpc_resp
= &fsinfo
,
4050 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, RPC_TASK_TIMEOUT
);
4052 spin_lock(&clp
->cl_lock
);
4053 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
4054 clp
->cl_last_renewal
= now
;
4055 spin_unlock(&clp
->cl_lock
);
4060 struct nfs4_delegreturndata
{
4061 struct nfs4_delegreturnargs args
;
4062 struct nfs4_delegreturnres res
;
4064 nfs4_stateid stateid
;
4065 unsigned long timestamp
;
4066 struct nfs_fattr fattr
;
4070 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
4072 struct nfs4_delegreturndata
*data
= calldata
;
4074 if (!nfs4_sequence_done(task
, &data
->res
.seq_res
))
4077 switch (task
->tk_status
) {
4078 case -NFS4ERR_STALE_STATEID
:
4079 case -NFS4ERR_EXPIRED
:
4081 renew_lease(data
->res
.server
, data
->timestamp
);
4084 if (nfs4_async_handle_error(task
, data
->res
.server
, NULL
) ==
4086 rpc_restart_call_prepare(task
);
4090 data
->rpc_status
= task
->tk_status
;
4093 static void nfs4_delegreturn_release(void *calldata
)
4098 #if defined(CONFIG_NFS_V4_1)
4099 static void nfs4_delegreturn_prepare(struct rpc_task
*task
, void *data
)
4101 struct nfs4_delegreturndata
*d_data
;
4103 d_data
= (struct nfs4_delegreturndata
*)data
;
4105 if (nfs4_setup_sequence(d_data
->res
.server
,
4106 &d_data
->args
.seq_args
,
4107 &d_data
->res
.seq_res
, task
))
4109 rpc_call_start(task
);
4111 #endif /* CONFIG_NFS_V4_1 */
4113 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
4114 #if defined(CONFIG_NFS_V4_1)
4115 .rpc_call_prepare
= nfs4_delegreturn_prepare
,
4116 #endif /* CONFIG_NFS_V4_1 */
4117 .rpc_call_done
= nfs4_delegreturn_done
,
4118 .rpc_release
= nfs4_delegreturn_release
,
4121 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
4123 struct nfs4_delegreturndata
*data
;
4124 struct nfs_server
*server
= NFS_SERVER(inode
);
4125 struct rpc_task
*task
;
4126 struct rpc_message msg
= {
4127 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
4130 struct rpc_task_setup task_setup_data
= {
4131 .rpc_client
= server
->client
,
4132 .rpc_message
= &msg
,
4133 .callback_ops
= &nfs4_delegreturn_ops
,
4134 .flags
= RPC_TASK_ASYNC
,
4138 data
= kzalloc(sizeof(*data
), GFP_NOFS
);
4141 nfs41_init_sequence(&data
->args
.seq_args
, &data
->res
.seq_res
, 1);
4142 data
->args
.fhandle
= &data
->fh
;
4143 data
->args
.stateid
= &data
->stateid
;
4144 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
4145 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
4146 nfs4_stateid_copy(&data
->stateid
, stateid
);
4147 data
->res
.fattr
= &data
->fattr
;
4148 data
->res
.server
= server
;
4149 nfs_fattr_init(data
->res
.fattr
);
4150 data
->timestamp
= jiffies
;
4151 data
->rpc_status
= 0;
4153 task_setup_data
.callback_data
= data
;
4154 msg
.rpc_argp
= &data
->args
;
4155 msg
.rpc_resp
= &data
->res
;
4156 task
= rpc_run_task(&task_setup_data
);
4158 return PTR_ERR(task
);
4161 status
= nfs4_wait_for_completion_rpc_task(task
);
4164 status
= data
->rpc_status
;
4166 nfs_post_op_update_inode_force_wcc(inode
, &data
->fattr
);
4168 nfs_refresh_inode(inode
, &data
->fattr
);
4174 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
4176 struct nfs_server
*server
= NFS_SERVER(inode
);
4177 struct nfs4_exception exception
= { };
4180 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
, issync
);
4182 case -NFS4ERR_STALE_STATEID
:
4183 case -NFS4ERR_EXPIRED
:
4187 err
= nfs4_handle_exception(server
, err
, &exception
);
4188 } while (exception
.retry
);
4192 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4193 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4196 * sleep, with exponential backoff, and retry the LOCK operation.
4198 static unsigned long
4199 nfs4_set_lock_task_retry(unsigned long timeout
)
4201 freezable_schedule_timeout_killable(timeout
);
4203 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
4204 return NFS4_LOCK_MAXTIMEOUT
;
4208 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4210 struct inode
*inode
= state
->inode
;
4211 struct nfs_server
*server
= NFS_SERVER(inode
);
4212 struct nfs_client
*clp
= server
->nfs_client
;
4213 struct nfs_lockt_args arg
= {
4214 .fh
= NFS_FH(inode
),
4217 struct nfs_lockt_res res
= {
4220 struct rpc_message msg
= {
4221 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
4224 .rpc_cred
= state
->owner
->so_cred
,
4226 struct nfs4_lock_state
*lsp
;
4229 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
4230 status
= nfs4_set_lock_state(state
, request
);
4233 lsp
= request
->fl_u
.nfs4_fl
.owner
;
4234 arg
.lock_owner
.id
= lsp
->ls_seqid
.owner_id
;
4235 arg
.lock_owner
.s_dev
= server
->s_dev
;
4236 status
= nfs4_call_sync(server
->client
, server
, &msg
, &arg
.seq_args
, &res
.seq_res
, 1);
4239 request
->fl_type
= F_UNLCK
;
4241 case -NFS4ERR_DENIED
:
4244 request
->fl_ops
->fl_release_private(request
);
4249 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4251 struct nfs4_exception exception
= { };
4255 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
4256 _nfs4_proc_getlk(state
, cmd
, request
),
4258 } while (exception
.retry
);
4262 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
4265 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
4267 res
= posix_lock_file_wait(file
, fl
);
4270 res
= flock_lock_file_wait(file
, fl
);
4278 struct nfs4_unlockdata
{
4279 struct nfs_locku_args arg
;
4280 struct nfs_locku_res res
;
4281 struct nfs4_lock_state
*lsp
;
4282 struct nfs_open_context
*ctx
;
4283 struct file_lock fl
;
4284 const struct nfs_server
*server
;
4285 unsigned long timestamp
;
4288 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
4289 struct nfs_open_context
*ctx
,
4290 struct nfs4_lock_state
*lsp
,
4291 struct nfs_seqid
*seqid
)
4293 struct nfs4_unlockdata
*p
;
4294 struct inode
*inode
= lsp
->ls_state
->inode
;
4296 p
= kzalloc(sizeof(*p
), GFP_NOFS
);
4299 p
->arg
.fh
= NFS_FH(inode
);
4301 p
->arg
.seqid
= seqid
;
4302 p
->res
.seqid
= seqid
;
4303 p
->arg
.stateid
= &lsp
->ls_stateid
;
4305 atomic_inc(&lsp
->ls_count
);
4306 /* Ensure we don't close file until we're done freeing locks! */
4307 p
->ctx
= get_nfs_open_context(ctx
);
4308 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
4309 p
->server
= NFS_SERVER(inode
);
4313 static void nfs4_locku_release_calldata(void *data
)
4315 struct nfs4_unlockdata
*calldata
= data
;
4316 nfs_free_seqid(calldata
->arg
.seqid
);
4317 nfs4_put_lock_state(calldata
->lsp
);
4318 put_nfs_open_context(calldata
->ctx
);
4322 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
4324 struct nfs4_unlockdata
*calldata
= data
;
4326 if (!nfs4_sequence_done(task
, &calldata
->res
.seq_res
))
4328 switch (task
->tk_status
) {
4330 nfs4_stateid_copy(&calldata
->lsp
->ls_stateid
,
4331 &calldata
->res
.stateid
);
4332 renew_lease(calldata
->server
, calldata
->timestamp
);
4334 case -NFS4ERR_BAD_STATEID
:
4335 case -NFS4ERR_OLD_STATEID
:
4336 case -NFS4ERR_STALE_STATEID
:
4337 case -NFS4ERR_EXPIRED
:
4340 if (nfs4_async_handle_error(task
, calldata
->server
, NULL
) == -EAGAIN
)
4341 rpc_restart_call_prepare(task
);
4345 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
4347 struct nfs4_unlockdata
*calldata
= data
;
4349 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
4351 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
4352 /* Note: exit _without_ running nfs4_locku_done */
4353 task
->tk_action
= NULL
;
4356 calldata
->timestamp
= jiffies
;
4357 if (nfs4_setup_sequence(calldata
->server
,
4358 &calldata
->arg
.seq_args
,
4359 &calldata
->res
.seq_res
, task
))
4361 rpc_call_start(task
);
4364 static const struct rpc_call_ops nfs4_locku_ops
= {
4365 .rpc_call_prepare
= nfs4_locku_prepare
,
4366 .rpc_call_done
= nfs4_locku_done
,
4367 .rpc_release
= nfs4_locku_release_calldata
,
4370 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
4371 struct nfs_open_context
*ctx
,
4372 struct nfs4_lock_state
*lsp
,
4373 struct nfs_seqid
*seqid
)
4375 struct nfs4_unlockdata
*data
;
4376 struct rpc_message msg
= {
4377 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
4378 .rpc_cred
= ctx
->cred
,
4380 struct rpc_task_setup task_setup_data
= {
4381 .rpc_client
= NFS_CLIENT(lsp
->ls_state
->inode
),
4382 .rpc_message
= &msg
,
4383 .callback_ops
= &nfs4_locku_ops
,
4384 .workqueue
= nfsiod_workqueue
,
4385 .flags
= RPC_TASK_ASYNC
,
4388 /* Ensure this is an unlock - when canceling a lock, the
4389 * canceled lock is passed in, and it won't be an unlock.
4391 fl
->fl_type
= F_UNLCK
;
4393 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
4395 nfs_free_seqid(seqid
);
4396 return ERR_PTR(-ENOMEM
);
4399 nfs41_init_sequence(&data
->arg
.seq_args
, &data
->res
.seq_res
, 1);
4400 msg
.rpc_argp
= &data
->arg
;
4401 msg
.rpc_resp
= &data
->res
;
4402 task_setup_data
.callback_data
= data
;
4403 return rpc_run_task(&task_setup_data
);
4406 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4408 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
4409 struct nfs_seqid
*seqid
;
4410 struct nfs4_lock_state
*lsp
;
4411 struct rpc_task
*task
;
4413 unsigned char fl_flags
= request
->fl_flags
;
4415 status
= nfs4_set_lock_state(state
, request
);
4416 /* Unlock _before_ we do the RPC call */
4417 request
->fl_flags
|= FL_EXISTS
;
4418 down_read(&nfsi
->rwsem
);
4419 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
) {
4420 up_read(&nfsi
->rwsem
);
4423 up_read(&nfsi
->rwsem
);
4426 /* Is this a delegated lock? */
4427 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
4429 lsp
= request
->fl_u
.nfs4_fl
.owner
;
4430 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
, GFP_KERNEL
);
4434 task
= nfs4_do_unlck(request
, nfs_file_open_context(request
->fl_file
), lsp
, seqid
);
4435 status
= PTR_ERR(task
);
4438 status
= nfs4_wait_for_completion_rpc_task(task
);
4441 request
->fl_flags
= fl_flags
;
4445 struct nfs4_lockdata
{
4446 struct nfs_lock_args arg
;
4447 struct nfs_lock_res res
;
4448 struct nfs4_lock_state
*lsp
;
4449 struct nfs_open_context
*ctx
;
4450 struct file_lock fl
;
4451 unsigned long timestamp
;
4454 struct nfs_server
*server
;
4457 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
4458 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
,
4461 struct nfs4_lockdata
*p
;
4462 struct inode
*inode
= lsp
->ls_state
->inode
;
4463 struct nfs_server
*server
= NFS_SERVER(inode
);
4465 p
= kzalloc(sizeof(*p
), gfp_mask
);
4469 p
->arg
.fh
= NFS_FH(inode
);
4471 p
->arg
.open_seqid
= nfs_alloc_seqid(&lsp
->ls_state
->owner
->so_seqid
, gfp_mask
);
4472 if (p
->arg
.open_seqid
== NULL
)
4474 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
, gfp_mask
);
4475 if (p
->arg
.lock_seqid
== NULL
)
4476 goto out_free_seqid
;
4477 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
4478 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
4479 p
->arg
.lock_owner
.id
= lsp
->ls_seqid
.owner_id
;
4480 p
->arg
.lock_owner
.s_dev
= server
->s_dev
;
4481 p
->res
.lock_seqid
= p
->arg
.lock_seqid
;
4484 atomic_inc(&lsp
->ls_count
);
4485 p
->ctx
= get_nfs_open_context(ctx
);
4486 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
4489 nfs_free_seqid(p
->arg
.open_seqid
);
4495 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
4497 struct nfs4_lockdata
*data
= calldata
;
4498 struct nfs4_state
*state
= data
->lsp
->ls_state
;
4500 dprintk("%s: begin!\n", __func__
);
4501 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
4503 /* Do we need to do an open_to_lock_owner? */
4504 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
4505 if (nfs_wait_on_sequence(data
->arg
.open_seqid
, task
) != 0)
4507 data
->arg
.open_stateid
= &state
->stateid
;
4508 data
->arg
.new_lock_owner
= 1;
4509 data
->res
.open_seqid
= data
->arg
.open_seqid
;
4511 data
->arg
.new_lock_owner
= 0;
4512 data
->timestamp
= jiffies
;
4513 if (nfs4_setup_sequence(data
->server
,
4514 &data
->arg
.seq_args
,
4515 &data
->res
.seq_res
, task
))
4517 rpc_call_start(task
);
4518 dprintk("%s: done!, ret = %d\n", __func__
, data
->rpc_status
);
4521 static void nfs4_recover_lock_prepare(struct rpc_task
*task
, void *calldata
)
4523 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
4524 nfs4_lock_prepare(task
, calldata
);
4527 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
4529 struct nfs4_lockdata
*data
= calldata
;
4531 dprintk("%s: begin!\n", __func__
);
4533 if (!nfs4_sequence_done(task
, &data
->res
.seq_res
))
4536 data
->rpc_status
= task
->tk_status
;
4537 if (data
->arg
.new_lock_owner
!= 0) {
4538 if (data
->rpc_status
== 0)
4539 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
4543 if (data
->rpc_status
== 0) {
4544 nfs4_stateid_copy(&data
->lsp
->ls_stateid
, &data
->res
.stateid
);
4545 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
4546 renew_lease(NFS_SERVER(data
->ctx
->dentry
->d_inode
), data
->timestamp
);
4549 dprintk("%s: done, ret = %d!\n", __func__
, data
->rpc_status
);
4552 static void nfs4_lock_release(void *calldata
)
4554 struct nfs4_lockdata
*data
= calldata
;
4556 dprintk("%s: begin!\n", __func__
);
4557 nfs_free_seqid(data
->arg
.open_seqid
);
4558 if (data
->cancelled
!= 0) {
4559 struct rpc_task
*task
;
4560 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
4561 data
->arg
.lock_seqid
);
4563 rpc_put_task_async(task
);
4564 dprintk("%s: cancelling lock!\n", __func__
);
4566 nfs_free_seqid(data
->arg
.lock_seqid
);
4567 nfs4_put_lock_state(data
->lsp
);
4568 put_nfs_open_context(data
->ctx
);
4570 dprintk("%s: done!\n", __func__
);
4573 static const struct rpc_call_ops nfs4_lock_ops
= {
4574 .rpc_call_prepare
= nfs4_lock_prepare
,
4575 .rpc_call_done
= nfs4_lock_done
,
4576 .rpc_release
= nfs4_lock_release
,
4579 static const struct rpc_call_ops nfs4_recover_lock_ops
= {
4580 .rpc_call_prepare
= nfs4_recover_lock_prepare
,
4581 .rpc_call_done
= nfs4_lock_done
,
4582 .rpc_release
= nfs4_lock_release
,
4585 static void nfs4_handle_setlk_error(struct nfs_server
*server
, struct nfs4_lock_state
*lsp
, int new_lock_owner
, int error
)
4588 case -NFS4ERR_ADMIN_REVOKED
:
4589 case -NFS4ERR_BAD_STATEID
:
4590 lsp
->ls_seqid
.flags
&= ~NFS_SEQID_CONFIRMED
;
4591 if (new_lock_owner
!= 0 ||
4592 (lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) != 0)
4593 nfs4_schedule_stateid_recovery(server
, lsp
->ls_state
);
4595 case -NFS4ERR_STALE_STATEID
:
4596 lsp
->ls_seqid
.flags
&= ~NFS_SEQID_CONFIRMED
;
4597 case -NFS4ERR_EXPIRED
:
4598 nfs4_schedule_lease_recovery(server
->nfs_client
);
4602 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int recovery_type
)
4604 struct nfs4_lockdata
*data
;
4605 struct rpc_task
*task
;
4606 struct rpc_message msg
= {
4607 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
4608 .rpc_cred
= state
->owner
->so_cred
,
4610 struct rpc_task_setup task_setup_data
= {
4611 .rpc_client
= NFS_CLIENT(state
->inode
),
4612 .rpc_message
= &msg
,
4613 .callback_ops
= &nfs4_lock_ops
,
4614 .workqueue
= nfsiod_workqueue
,
4615 .flags
= RPC_TASK_ASYNC
,
4619 dprintk("%s: begin!\n", __func__
);
4620 data
= nfs4_alloc_lockdata(fl
, nfs_file_open_context(fl
->fl_file
),
4621 fl
->fl_u
.nfs4_fl
.owner
,
4622 recovery_type
== NFS_LOCK_NEW
? GFP_KERNEL
: GFP_NOFS
);
4626 data
->arg
.block
= 1;
4627 if (recovery_type
> NFS_LOCK_NEW
) {
4628 if (recovery_type
== NFS_LOCK_RECLAIM
)
4629 data
->arg
.reclaim
= NFS_LOCK_RECLAIM
;
4630 task_setup_data
.callback_ops
= &nfs4_recover_lock_ops
;
4632 nfs41_init_sequence(&data
->arg
.seq_args
, &data
->res
.seq_res
, 1);
4633 msg
.rpc_argp
= &data
->arg
;
4634 msg
.rpc_resp
= &data
->res
;
4635 task_setup_data
.callback_data
= data
;
4636 task
= rpc_run_task(&task_setup_data
);
4638 return PTR_ERR(task
);
4639 ret
= nfs4_wait_for_completion_rpc_task(task
);
4641 ret
= data
->rpc_status
;
4643 nfs4_handle_setlk_error(data
->server
, data
->lsp
,
4644 data
->arg
.new_lock_owner
, ret
);
4646 data
->cancelled
= 1;
4648 dprintk("%s: done, ret = %d!\n", __func__
, ret
);
4652 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
4654 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4655 struct nfs4_exception exception
= {
4656 .inode
= state
->inode
,
4661 /* Cache the lock if possible... */
4662 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
4664 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, NFS_LOCK_RECLAIM
);
4665 if (err
!= -NFS4ERR_DELAY
)
4667 nfs4_handle_exception(server
, err
, &exception
);
4668 } while (exception
.retry
);
4672 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
4674 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4675 struct nfs4_exception exception
= {
4676 .inode
= state
->inode
,
4680 err
= nfs4_set_lock_state(state
, request
);
4684 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
4686 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, NFS_LOCK_EXPIRED
);
4690 case -NFS4ERR_GRACE
:
4691 case -NFS4ERR_DELAY
:
4692 nfs4_handle_exception(server
, err
, &exception
);
4695 } while (exception
.retry
);
4700 #if defined(CONFIG_NFS_V4_1)
4701 static int nfs41_check_expired_locks(struct nfs4_state
*state
)
4703 int status
, ret
= NFS_OK
;
4704 struct nfs4_lock_state
*lsp
;
4705 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4707 list_for_each_entry(lsp
, &state
->lock_states
, ls_locks
) {
4708 if (lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) {
4709 status
= nfs41_test_stateid(server
, &lsp
->ls_stateid
);
4710 if (status
!= NFS_OK
) {
4711 nfs41_free_stateid(server
, &lsp
->ls_stateid
);
4712 lsp
->ls_flags
&= ~NFS_LOCK_INITIALIZED
;
4721 static int nfs41_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
4723 int status
= NFS_OK
;
4725 if (test_bit(LK_STATE_IN_USE
, &state
->flags
))
4726 status
= nfs41_check_expired_locks(state
);
4727 if (status
== NFS_OK
)
4729 return nfs4_lock_expired(state
, request
);
4733 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4735 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
4736 unsigned char fl_flags
= request
->fl_flags
;
4737 int status
= -ENOLCK
;
4739 if ((fl_flags
& FL_POSIX
) &&
4740 !test_bit(NFS_STATE_POSIX_LOCKS
, &state
->flags
))
4742 /* Is this a delegated open? */
4743 status
= nfs4_set_lock_state(state
, request
);
4746 request
->fl_flags
|= FL_ACCESS
;
4747 status
= do_vfs_lock(request
->fl_file
, request
);
4750 down_read(&nfsi
->rwsem
);
4751 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
4752 /* Yes: cache locks! */
4753 /* ...but avoid races with delegation recall... */
4754 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
4755 status
= do_vfs_lock(request
->fl_file
, request
);
4758 status
= _nfs4_do_setlk(state
, cmd
, request
, NFS_LOCK_NEW
);
4761 /* Note: we always want to sleep here! */
4762 request
->fl_flags
= fl_flags
| FL_SLEEP
;
4763 if (do_vfs_lock(request
->fl_file
, request
) < 0)
4764 printk(KERN_WARNING
"NFS: %s: VFS is out of sync with lock "
4765 "manager!\n", __func__
);
4767 up_read(&nfsi
->rwsem
);
4769 request
->fl_flags
= fl_flags
;
4773 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
4775 struct nfs4_exception exception
= {
4777 .inode
= state
->inode
,
4782 err
= _nfs4_proc_setlk(state
, cmd
, request
);
4783 if (err
== -NFS4ERR_DENIED
)
4785 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
4787 } while (exception
.retry
);
4792 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
4794 struct nfs_open_context
*ctx
;
4795 struct nfs4_state
*state
;
4796 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
4799 /* verify open state */
4800 ctx
= nfs_file_open_context(filp
);
4803 if (request
->fl_start
< 0 || request
->fl_end
< 0)
4806 if (IS_GETLK(cmd
)) {
4808 return nfs4_proc_getlk(state
, F_GETLK
, request
);
4812 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
4815 if (request
->fl_type
== F_UNLCK
) {
4817 return nfs4_proc_unlck(state
, cmd
, request
);
4824 * Don't rely on the VFS having checked the file open mode,
4825 * since it won't do this for flock() locks.
4827 switch (request
->fl_type
& (F_RDLCK
|F_WRLCK
|F_UNLCK
)) {
4829 if (!(filp
->f_mode
& FMODE_READ
))
4833 if (!(filp
->f_mode
& FMODE_WRITE
))
4838 status
= nfs4_proc_setlk(state
, cmd
, request
);
4839 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
4841 timeout
= nfs4_set_lock_task_retry(timeout
);
4842 status
= -ERESTARTSYS
;
4845 } while(status
< 0);
4849 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
4851 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
4852 struct nfs4_exception exception
= { };
4855 err
= nfs4_set_lock_state(state
, fl
);
4859 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, NFS_LOCK_NEW
);
4862 printk(KERN_ERR
"NFS: %s: unhandled error "
4863 "%d.\n", __func__
, err
);
4867 case -NFS4ERR_EXPIRED
:
4868 nfs4_schedule_stateid_recovery(server
, state
);
4869 case -NFS4ERR_STALE_CLIENTID
:
4870 case -NFS4ERR_STALE_STATEID
:
4871 nfs4_schedule_lease_recovery(server
->nfs_client
);
4873 case -NFS4ERR_BADSESSION
:
4874 case -NFS4ERR_BADSLOT
:
4875 case -NFS4ERR_BAD_HIGH_SLOT
:
4876 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION
:
4877 case -NFS4ERR_DEADSESSION
:
4878 nfs4_schedule_session_recovery(server
->nfs_client
->cl_session
, err
);
4882 * The show must go on: exit, but mark the
4883 * stateid as needing recovery.
4885 case -NFS4ERR_DELEG_REVOKED
:
4886 case -NFS4ERR_ADMIN_REVOKED
:
4887 case -NFS4ERR_BAD_STATEID
:
4888 case -NFS4ERR_OPENMODE
:
4889 nfs4_schedule_stateid_recovery(server
, state
);
4894 * User RPCSEC_GSS context has expired.
4895 * We cannot recover this stateid now, so
4896 * skip it and allow recovery thread to
4902 case -NFS4ERR_DENIED
:
4903 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4906 case -NFS4ERR_DELAY
:
4909 err
= nfs4_handle_exception(server
, err
, &exception
);
4910 } while (exception
.retry
);
4915 struct nfs_release_lockowner_data
{
4916 struct nfs4_lock_state
*lsp
;
4917 struct nfs_server
*server
;
4918 struct nfs_release_lockowner_args args
;
4921 static void nfs4_release_lockowner_release(void *calldata
)
4923 struct nfs_release_lockowner_data
*data
= calldata
;
4924 nfs4_free_lock_state(data
->server
, data
->lsp
);
4928 static const struct rpc_call_ops nfs4_release_lockowner_ops
= {
4929 .rpc_release
= nfs4_release_lockowner_release
,
4932 int nfs4_release_lockowner(struct nfs4_lock_state
*lsp
)
4934 struct nfs_server
*server
= lsp
->ls_state
->owner
->so_server
;
4935 struct nfs_release_lockowner_data
*data
;
4936 struct rpc_message msg
= {
4937 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RELEASE_LOCKOWNER
],
4940 if (server
->nfs_client
->cl_mvops
->minor_version
!= 0)
4942 data
= kmalloc(sizeof(*data
), GFP_NOFS
);
4946 data
->server
= server
;
4947 data
->args
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
4948 data
->args
.lock_owner
.id
= lsp
->ls_seqid
.owner_id
;
4949 data
->args
.lock_owner
.s_dev
= server
->s_dev
;
4950 msg
.rpc_argp
= &data
->args
;
4951 rpc_call_async(server
->client
, &msg
, 0, &nfs4_release_lockowner_ops
, data
);
4955 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4957 static int nfs4_xattr_set_nfs4_acl(struct dentry
*dentry
, const char *key
,
4958 const void *buf
, size_t buflen
,
4959 int flags
, int type
)
4961 if (strcmp(key
, "") != 0)
4964 return nfs4_proc_set_acl(dentry
->d_inode
, buf
, buflen
);
4967 static int nfs4_xattr_get_nfs4_acl(struct dentry
*dentry
, const char *key
,
4968 void *buf
, size_t buflen
, int type
)
4970 if (strcmp(key
, "") != 0)
4973 return nfs4_proc_get_acl(dentry
->d_inode
, buf
, buflen
);
4976 static size_t nfs4_xattr_list_nfs4_acl(struct dentry
*dentry
, char *list
,
4977 size_t list_len
, const char *name
,
4978 size_t name_len
, int type
)
4980 size_t len
= sizeof(XATTR_NAME_NFSV4_ACL
);
4982 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
4985 if (list
&& len
<= list_len
)
4986 memcpy(list
, XATTR_NAME_NFSV4_ACL
, len
);
4991 * nfs_fhget will use either the mounted_on_fileid or the fileid
4993 static void nfs_fixup_referral_attributes(struct nfs_fattr
*fattr
)
4995 if (!(((fattr
->valid
& NFS_ATTR_FATTR_MOUNTED_ON_FILEID
) ||
4996 (fattr
->valid
& NFS_ATTR_FATTR_FILEID
)) &&
4997 (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
4998 (fattr
->valid
& NFS_ATTR_FATTR_V4_LOCATIONS
)))
5001 fattr
->valid
|= NFS_ATTR_FATTR_TYPE
| NFS_ATTR_FATTR_MODE
|
5002 NFS_ATTR_FATTR_NLINK
| NFS_ATTR_FATTR_V4_REFERRAL
;
5003 fattr
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
5007 static int _nfs4_proc_fs_locations(struct rpc_clnt
*client
, struct inode
*dir
,
5008 const struct qstr
*name
,
5009 struct nfs4_fs_locations
*fs_locations
,
5012 struct nfs_server
*server
= NFS_SERVER(dir
);
5014 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
5016 struct nfs4_fs_locations_arg args
= {
5017 .dir_fh
= NFS_FH(dir
),
5022 struct nfs4_fs_locations_res res
= {
5023 .fs_locations
= fs_locations
,
5025 struct rpc_message msg
= {
5026 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
5032 dprintk("%s: start\n", __func__
);
5034 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5035 * is not supported */
5036 if (NFS_SERVER(dir
)->attr_bitmask
[1] & FATTR4_WORD1_MOUNTED_ON_FILEID
)
5037 bitmask
[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID
;
5039 bitmask
[0] |= FATTR4_WORD0_FILEID
;
5041 nfs_fattr_init(&fs_locations
->fattr
);
5042 fs_locations
->server
= server
;
5043 fs_locations
->nlocations
= 0;
5044 status
= nfs4_call_sync(client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
5045 dprintk("%s: returned status = %d\n", __func__
, status
);
5049 int nfs4_proc_fs_locations(struct rpc_clnt
*client
, struct inode
*dir
,
5050 const struct qstr
*name
,
5051 struct nfs4_fs_locations
*fs_locations
,
5054 struct nfs4_exception exception
= { };
5057 err
= nfs4_handle_exception(NFS_SERVER(dir
),
5058 _nfs4_proc_fs_locations(client
, dir
, name
, fs_locations
, page
),
5060 } while (exception
.retry
);
5064 static int _nfs4_proc_secinfo(struct inode
*dir
, const struct qstr
*name
, struct nfs4_secinfo_flavors
*flavors
)
5067 struct nfs4_secinfo_arg args
= {
5068 .dir_fh
= NFS_FH(dir
),
5071 struct nfs4_secinfo_res res
= {
5074 struct rpc_message msg
= {
5075 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SECINFO
],
5080 dprintk("NFS call secinfo %s\n", name
->name
);
5081 status
= nfs4_call_sync(NFS_SERVER(dir
)->client
, NFS_SERVER(dir
), &msg
, &args
.seq_args
, &res
.seq_res
, 0);
5082 dprintk("NFS reply secinfo: %d\n", status
);
5086 int nfs4_proc_secinfo(struct inode
*dir
, const struct qstr
*name
,
5087 struct nfs4_secinfo_flavors
*flavors
)
5089 struct nfs4_exception exception
= { };
5092 err
= nfs4_handle_exception(NFS_SERVER(dir
),
5093 _nfs4_proc_secinfo(dir
, name
, flavors
),
5095 } while (exception
.retry
);
5099 #ifdef CONFIG_NFS_V4_1
5101 * Check the exchange flags returned by the server for invalid flags, having
5102 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5105 static int nfs4_check_cl_exchange_flags(u32 flags
)
5107 if (flags
& ~EXCHGID4_FLAG_MASK_R
)
5109 if ((flags
& EXCHGID4_FLAG_USE_PNFS_MDS
) &&
5110 (flags
& EXCHGID4_FLAG_USE_NON_PNFS
))
5112 if (!(flags
& (EXCHGID4_FLAG_MASK_PNFS
)))
5116 return -NFS4ERR_INVAL
;
5120 nfs41_same_server_scope(struct nfs41_server_scope
*a
,
5121 struct nfs41_server_scope
*b
)
5123 if (a
->server_scope_sz
== b
->server_scope_sz
&&
5124 memcmp(a
->server_scope
, b
->server_scope
, a
->server_scope_sz
) == 0)
5131 * nfs4_proc_bind_conn_to_session()
5133 * The 4.1 client currently uses the same TCP connection for the
5134 * fore and backchannel.
5136 int nfs4_proc_bind_conn_to_session(struct nfs_client
*clp
, struct rpc_cred
*cred
)
5139 struct nfs41_bind_conn_to_session_res res
;
5140 struct rpc_message msg
= {
5142 &nfs4_procedures
[NFSPROC4_CLNT_BIND_CONN_TO_SESSION
],
5148 dprintk("--> %s\n", __func__
);
5149 BUG_ON(clp
== NULL
);
5151 res
.session
= kzalloc(sizeof(struct nfs4_session
), GFP_NOFS
);
5152 if (unlikely(res
.session
== NULL
)) {
5157 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, RPC_TASK_TIMEOUT
);
5159 if (memcmp(res
.session
->sess_id
.data
,
5160 clp
->cl_session
->sess_id
.data
, NFS4_MAX_SESSIONID_LEN
)) {
5161 dprintk("NFS: %s: Session ID mismatch\n", __func__
);
5165 if (res
.dir
!= NFS4_CDFS4_BOTH
) {
5166 dprintk("NFS: %s: Unexpected direction from server\n",
5171 if (res
.use_conn_in_rdma_mode
) {
5172 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5181 dprintk("<-- %s status= %d\n", __func__
, status
);
5186 * nfs4_proc_exchange_id()
5188 * Since the clientid has expired, all compounds using sessions
5189 * associated with the stale clientid will be returning
5190 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5191 * be in some phase of session reset.
5193 int nfs4_proc_exchange_id(struct nfs_client
*clp
, struct rpc_cred
*cred
)
5195 nfs4_verifier verifier
;
5196 struct nfs41_exchange_id_args args
= {
5197 .verifier
= &verifier
,
5199 .flags
= EXCHGID4_FLAG_SUPP_MOVED_REFER
,
5201 struct nfs41_exchange_id_res res
= {
5205 struct rpc_message msg
= {
5206 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_EXCHANGE_ID
],
5212 dprintk("--> %s\n", __func__
);
5213 BUG_ON(clp
== NULL
);
5215 nfs4_init_boot_verifier(clp
, &verifier
);
5217 args
.id_len
= scnprintf(args
.id
, sizeof(args
.id
),
5220 clp
->cl_rpcclient
->cl_nodename
,
5221 clp
->cl_rpcclient
->cl_auth
->au_flavor
);
5223 res
.server_owner
= kzalloc(sizeof(struct nfs41_server_owner
),
5225 if (unlikely(res
.server_owner
== NULL
)) {
5230 res
.server_scope
= kzalloc(sizeof(struct nfs41_server_scope
),
5232 if (unlikely(res
.server_scope
== NULL
)) {
5234 goto out_server_owner
;
5237 res
.impl_id
= kzalloc(sizeof(struct nfs41_impl_id
), GFP_NOFS
);
5238 if (unlikely(res
.impl_id
== NULL
)) {
5240 goto out_server_scope
;
5243 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, RPC_TASK_TIMEOUT
);
5245 status
= nfs4_check_cl_exchange_flags(res
.flags
);
5248 clp
->cl_clientid
= res
.clientid
;
5249 clp
->cl_exchange_flags
= (res
.flags
& ~EXCHGID4_FLAG_CONFIRMED_R
);
5250 if (!(res
.flags
& EXCHGID4_FLAG_CONFIRMED_R
))
5251 clp
->cl_seqid
= res
.seqid
;
5253 kfree(clp
->cl_serverowner
);
5254 clp
->cl_serverowner
= res
.server_owner
;
5255 res
.server_owner
= NULL
;
5257 /* use the most recent implementation id */
5258 kfree(clp
->cl_implid
);
5259 clp
->cl_implid
= res
.impl_id
;
5261 if (clp
->cl_serverscope
!= NULL
&&
5262 !nfs41_same_server_scope(clp
->cl_serverscope
,
5263 res
.server_scope
)) {
5264 dprintk("%s: server_scope mismatch detected\n",
5266 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH
, &clp
->cl_state
);
5267 kfree(clp
->cl_serverscope
);
5268 clp
->cl_serverscope
= NULL
;
5271 if (clp
->cl_serverscope
== NULL
) {
5272 clp
->cl_serverscope
= res
.server_scope
;
5279 kfree(res
.server_owner
);
5281 kfree(res
.server_scope
);
5283 if (clp
->cl_implid
!= NULL
)
5284 dprintk("%s: Server Implementation ID: "
5285 "domain: %s, name: %s, date: %llu,%u\n",
5286 __func__
, clp
->cl_implid
->domain
, clp
->cl_implid
->name
,
5287 clp
->cl_implid
->date
.seconds
,
5288 clp
->cl_implid
->date
.nseconds
);
5289 dprintk("<-- %s status= %d\n", __func__
, status
);
5293 static int _nfs4_proc_destroy_clientid(struct nfs_client
*clp
,
5294 struct rpc_cred
*cred
)
5296 struct rpc_message msg
= {
5297 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DESTROY_CLIENTID
],
5303 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, RPC_TASK_TIMEOUT
);
5305 dprintk("NFS: Got error %d from the server %s on "
5306 "DESTROY_CLIENTID.", status
, clp
->cl_hostname
);
5310 static int nfs4_proc_destroy_clientid(struct nfs_client
*clp
,
5311 struct rpc_cred
*cred
)
5316 for (loop
= NFS4_MAX_LOOP_ON_RECOVER
; loop
!= 0; loop
--) {
5317 ret
= _nfs4_proc_destroy_clientid(clp
, cred
);
5319 case -NFS4ERR_DELAY
:
5320 case -NFS4ERR_CLIENTID_BUSY
:
5330 int nfs4_destroy_clientid(struct nfs_client
*clp
)
5332 struct rpc_cred
*cred
;
5335 if (clp
->cl_mvops
->minor_version
< 1)
5337 if (clp
->cl_exchange_flags
== 0)
5339 cred
= nfs4_get_exchange_id_cred(clp
);
5340 ret
= nfs4_proc_destroy_clientid(clp
, cred
);
5345 case -NFS4ERR_STALE_CLIENTID
:
5346 clp
->cl_exchange_flags
= 0;
5352 struct nfs4_get_lease_time_data
{
5353 struct nfs4_get_lease_time_args
*args
;
5354 struct nfs4_get_lease_time_res
*res
;
5355 struct nfs_client
*clp
;
5358 static void nfs4_get_lease_time_prepare(struct rpc_task
*task
,
5362 struct nfs4_get_lease_time_data
*data
=
5363 (struct nfs4_get_lease_time_data
*)calldata
;
5365 dprintk("--> %s\n", __func__
);
5366 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
5367 /* just setup sequence, do not trigger session recovery
5368 since we're invoked within one */
5369 ret
= nfs41_setup_sequence(data
->clp
->cl_session
,
5370 &data
->args
->la_seq_args
,
5371 &data
->res
->lr_seq_res
, task
);
5373 BUG_ON(ret
== -EAGAIN
);
5374 rpc_call_start(task
);
5375 dprintk("<-- %s\n", __func__
);
5379 * Called from nfs4_state_manager thread for session setup, so don't recover
5380 * from sequence operation or clientid errors.
5382 static void nfs4_get_lease_time_done(struct rpc_task
*task
, void *calldata
)
5384 struct nfs4_get_lease_time_data
*data
=
5385 (struct nfs4_get_lease_time_data
*)calldata
;
5387 dprintk("--> %s\n", __func__
);
5388 if (!nfs41_sequence_done(task
, &data
->res
->lr_seq_res
))
5390 switch (task
->tk_status
) {
5391 case -NFS4ERR_DELAY
:
5392 case -NFS4ERR_GRACE
:
5393 dprintk("%s Retry: tk_status %d\n", __func__
, task
->tk_status
);
5394 rpc_delay(task
, NFS4_POLL_RETRY_MIN
);
5395 task
->tk_status
= 0;
5397 case -NFS4ERR_RETRY_UNCACHED_REP
:
5398 rpc_restart_call_prepare(task
);
5401 dprintk("<-- %s\n", __func__
);
5404 static const struct rpc_call_ops nfs4_get_lease_time_ops
= {
5405 .rpc_call_prepare
= nfs4_get_lease_time_prepare
,
5406 .rpc_call_done
= nfs4_get_lease_time_done
,
5409 int nfs4_proc_get_lease_time(struct nfs_client
*clp
, struct nfs_fsinfo
*fsinfo
)
5411 struct rpc_task
*task
;
5412 struct nfs4_get_lease_time_args args
;
5413 struct nfs4_get_lease_time_res res
= {
5414 .lr_fsinfo
= fsinfo
,
5416 struct nfs4_get_lease_time_data data
= {
5421 struct rpc_message msg
= {
5422 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GET_LEASE_TIME
],
5426 struct rpc_task_setup task_setup
= {
5427 .rpc_client
= clp
->cl_rpcclient
,
5428 .rpc_message
= &msg
,
5429 .callback_ops
= &nfs4_get_lease_time_ops
,
5430 .callback_data
= &data
,
5431 .flags
= RPC_TASK_TIMEOUT
,
5435 nfs41_init_sequence(&args
.la_seq_args
, &res
.lr_seq_res
, 0);
5436 dprintk("--> %s\n", __func__
);
5437 task
= rpc_run_task(&task_setup
);
5440 status
= PTR_ERR(task
);
5442 status
= task
->tk_status
;
5445 dprintk("<-- %s return %d\n", __func__
, status
);
5450 static struct nfs4_slot
*nfs4_alloc_slots(u32 max_slots
, gfp_t gfp_flags
)
5452 return kcalloc(max_slots
, sizeof(struct nfs4_slot
), gfp_flags
);
5455 static void nfs4_add_and_init_slots(struct nfs4_slot_table
*tbl
,
5456 struct nfs4_slot
*new,
5460 struct nfs4_slot
*old
= NULL
;
5463 spin_lock(&tbl
->slot_tbl_lock
);
5467 tbl
->max_slots
= max_slots
;
5469 tbl
->highest_used_slotid
= -1; /* no slot is currently used */
5470 for (i
= 0; i
< tbl
->max_slots
; i
++)
5471 tbl
->slots
[i
].seq_nr
= ivalue
;
5472 spin_unlock(&tbl
->slot_tbl_lock
);
5477 * (re)Initialise a slot table
5479 static int nfs4_realloc_slot_table(struct nfs4_slot_table
*tbl
, u32 max_reqs
,
5482 struct nfs4_slot
*new = NULL
;
5485 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__
,
5486 max_reqs
, tbl
->max_slots
);
5488 /* Does the newly negotiated max_reqs match the existing slot table? */
5489 if (max_reqs
!= tbl
->max_slots
) {
5490 new = nfs4_alloc_slots(max_reqs
, GFP_NOFS
);
5496 nfs4_add_and_init_slots(tbl
, new, max_reqs
, ivalue
);
5497 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__
,
5498 tbl
, tbl
->slots
, tbl
->max_slots
);
5500 dprintk("<-- %s: return %d\n", __func__
, ret
);
5504 /* Destroy the slot table */
5505 static void nfs4_destroy_slot_tables(struct nfs4_session
*session
)
5507 if (session
->fc_slot_table
.slots
!= NULL
) {
5508 kfree(session
->fc_slot_table
.slots
);
5509 session
->fc_slot_table
.slots
= NULL
;
5511 if (session
->bc_slot_table
.slots
!= NULL
) {
5512 kfree(session
->bc_slot_table
.slots
);
5513 session
->bc_slot_table
.slots
= NULL
;
5519 * Initialize or reset the forechannel and backchannel tables
5521 static int nfs4_setup_session_slot_tables(struct nfs4_session
*ses
)
5523 struct nfs4_slot_table
*tbl
;
5526 dprintk("--> %s\n", __func__
);
5528 tbl
= &ses
->fc_slot_table
;
5529 status
= nfs4_realloc_slot_table(tbl
, ses
->fc_attrs
.max_reqs
, 1);
5530 if (status
) /* -ENOMEM */
5533 tbl
= &ses
->bc_slot_table
;
5534 status
= nfs4_realloc_slot_table(tbl
, ses
->bc_attrs
.max_reqs
, 0);
5535 if (status
&& tbl
->slots
== NULL
)
5536 /* Fore and back channel share a connection so get
5537 * both slot tables or neither */
5538 nfs4_destroy_slot_tables(ses
);
5542 struct nfs4_session
*nfs4_alloc_session(struct nfs_client
*clp
)
5544 struct nfs4_session
*session
;
5545 struct nfs4_slot_table
*tbl
;
5547 session
= kzalloc(sizeof(struct nfs4_session
), GFP_NOFS
);
5551 tbl
= &session
->fc_slot_table
;
5552 tbl
->highest_used_slotid
= NFS4_NO_SLOT
;
5553 spin_lock_init(&tbl
->slot_tbl_lock
);
5554 rpc_init_priority_wait_queue(&tbl
->slot_tbl_waitq
, "ForeChannel Slot table");
5555 init_completion(&tbl
->complete
);
5557 tbl
= &session
->bc_slot_table
;
5558 tbl
->highest_used_slotid
= NFS4_NO_SLOT
;
5559 spin_lock_init(&tbl
->slot_tbl_lock
);
5560 rpc_init_wait_queue(&tbl
->slot_tbl_waitq
, "BackChannel Slot table");
5561 init_completion(&tbl
->complete
);
5563 session
->session_state
= 1<<NFS4_SESSION_INITING
;
5569 void nfs4_destroy_session(struct nfs4_session
*session
)
5571 struct rpc_xprt
*xprt
;
5572 struct rpc_cred
*cred
;
5574 cred
= nfs4_get_exchange_id_cred(session
->clp
);
5575 nfs4_proc_destroy_session(session
, cred
);
5580 xprt
= rcu_dereference(session
->clp
->cl_rpcclient
->cl_xprt
);
5582 dprintk("%s Destroy backchannel for xprt %p\n",
5584 xprt_destroy_backchannel(xprt
, NFS41_BC_MIN_CALLBACKS
);
5585 nfs4_destroy_slot_tables(session
);
5590 * Initialize the values to be used by the client in CREATE_SESSION
5591 * If nfs4_init_session set the fore channel request and response sizes,
5594 * Set the back channel max_resp_sz_cached to zero to force the client to
5595 * always set csa_cachethis to FALSE because the current implementation
5596 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5598 static void nfs4_init_channel_attrs(struct nfs41_create_session_args
*args
)
5600 struct nfs4_session
*session
= args
->client
->cl_session
;
5601 unsigned int mxrqst_sz
= session
->fc_attrs
.max_rqst_sz
,
5602 mxresp_sz
= session
->fc_attrs
.max_resp_sz
;
5605 mxrqst_sz
= NFS_MAX_FILE_IO_SIZE
;
5607 mxresp_sz
= NFS_MAX_FILE_IO_SIZE
;
5608 /* Fore channel attributes */
5609 args
->fc_attrs
.max_rqst_sz
= mxrqst_sz
;
5610 args
->fc_attrs
.max_resp_sz
= mxresp_sz
;
5611 args
->fc_attrs
.max_ops
= NFS4_MAX_OPS
;
5612 args
->fc_attrs
.max_reqs
= max_session_slots
;
5614 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5615 "max_ops=%u max_reqs=%u\n",
5617 args
->fc_attrs
.max_rqst_sz
, args
->fc_attrs
.max_resp_sz
,
5618 args
->fc_attrs
.max_ops
, args
->fc_attrs
.max_reqs
);
5620 /* Back channel attributes */
5621 args
->bc_attrs
.max_rqst_sz
= PAGE_SIZE
;
5622 args
->bc_attrs
.max_resp_sz
= PAGE_SIZE
;
5623 args
->bc_attrs
.max_resp_sz_cached
= 0;
5624 args
->bc_attrs
.max_ops
= NFS4_MAX_BACK_CHANNEL_OPS
;
5625 args
->bc_attrs
.max_reqs
= 1;
5627 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5628 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5630 args
->bc_attrs
.max_rqst_sz
, args
->bc_attrs
.max_resp_sz
,
5631 args
->bc_attrs
.max_resp_sz_cached
, args
->bc_attrs
.max_ops
,
5632 args
->bc_attrs
.max_reqs
);
5635 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args
*args
, struct nfs4_session
*session
)
5637 struct nfs4_channel_attrs
*sent
= &args
->fc_attrs
;
5638 struct nfs4_channel_attrs
*rcvd
= &session
->fc_attrs
;
5640 if (rcvd
->max_resp_sz
> sent
->max_resp_sz
)
5643 * Our requested max_ops is the minimum we need; we're not
5644 * prepared to break up compounds into smaller pieces than that.
5645 * So, no point even trying to continue if the server won't
5648 if (rcvd
->max_ops
< sent
->max_ops
)
5650 if (rcvd
->max_reqs
== 0)
5652 if (rcvd
->max_reqs
> NFS4_MAX_SLOT_TABLE
)
5653 rcvd
->max_reqs
= NFS4_MAX_SLOT_TABLE
;
5657 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args
*args
, struct nfs4_session
*session
)
5659 struct nfs4_channel_attrs
*sent
= &args
->bc_attrs
;
5660 struct nfs4_channel_attrs
*rcvd
= &session
->bc_attrs
;
5662 if (rcvd
->max_rqst_sz
> sent
->max_rqst_sz
)
5664 if (rcvd
->max_resp_sz
< sent
->max_resp_sz
)
5666 if (rcvd
->max_resp_sz_cached
> sent
->max_resp_sz_cached
)
5668 /* These would render the backchannel useless: */
5669 if (rcvd
->max_ops
!= sent
->max_ops
)
5671 if (rcvd
->max_reqs
!= sent
->max_reqs
)
5676 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args
*args
,
5677 struct nfs4_session
*session
)
5681 ret
= nfs4_verify_fore_channel_attrs(args
, session
);
5684 return nfs4_verify_back_channel_attrs(args
, session
);
5687 static int _nfs4_proc_create_session(struct nfs_client
*clp
,
5688 struct rpc_cred
*cred
)
5690 struct nfs4_session
*session
= clp
->cl_session
;
5691 struct nfs41_create_session_args args
= {
5693 .cb_program
= NFS4_CALLBACK
,
5695 struct nfs41_create_session_res res
= {
5698 struct rpc_message msg
= {
5699 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE_SESSION
],
5706 nfs4_init_channel_attrs(&args
);
5707 args
.flags
= (SESSION4_PERSIST
| SESSION4_BACK_CHAN
);
5709 status
= rpc_call_sync(session
->clp
->cl_rpcclient
, &msg
, RPC_TASK_TIMEOUT
);
5712 /* Verify the session's negotiated channel_attrs values */
5713 status
= nfs4_verify_channel_attrs(&args
, session
);
5715 /* Increment the clientid slot sequence id */
5723 * Issues a CREATE_SESSION operation to the server.
5724 * It is the responsibility of the caller to verify the session is
5725 * expired before calling this routine.
5727 int nfs4_proc_create_session(struct nfs_client
*clp
, struct rpc_cred
*cred
)
5731 struct nfs4_session
*session
= clp
->cl_session
;
5733 dprintk("--> %s clp=%p session=%p\n", __func__
, clp
, session
);
5735 status
= _nfs4_proc_create_session(clp
, cred
);
5739 /* Init or reset the session slot tables */
5740 status
= nfs4_setup_session_slot_tables(session
);
5741 dprintk("slot table setup returned %d\n", status
);
5745 ptr
= (unsigned *)&session
->sess_id
.data
[0];
5746 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__
,
5747 clp
->cl_seqid
, ptr
[0], ptr
[1], ptr
[2], ptr
[3]);
5749 dprintk("<-- %s\n", __func__
);
5754 * Issue the over-the-wire RPC DESTROY_SESSION.
5755 * The caller must serialize access to this routine.
5757 int nfs4_proc_destroy_session(struct nfs4_session
*session
,
5758 struct rpc_cred
*cred
)
5760 struct rpc_message msg
= {
5761 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DESTROY_SESSION
],
5762 .rpc_argp
= session
,
5767 dprintk("--> nfs4_proc_destroy_session\n");
5769 /* session is still being setup */
5770 if (session
->clp
->cl_cons_state
!= NFS_CS_READY
)
5773 status
= rpc_call_sync(session
->clp
->cl_rpcclient
, &msg
, RPC_TASK_TIMEOUT
);
5776 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
5777 "Session has been destroyed regardless...\n", status
);
5779 dprintk("<-- nfs4_proc_destroy_session\n");
5784 * With sessions, the client is not marked ready until after a
5785 * successful EXCHANGE_ID and CREATE_SESSION.
5787 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
5788 * other versions of NFS can be tried.
5790 static int nfs41_check_session_ready(struct nfs_client
*clp
)
5794 if (clp
->cl_cons_state
== NFS_CS_SESSION_INITING
) {
5795 ret
= nfs4_client_recover_expired_lease(clp
);
5799 if (clp
->cl_cons_state
< NFS_CS_READY
)
5800 return -EPROTONOSUPPORT
;
5805 int nfs4_init_session(struct nfs_server
*server
)
5807 struct nfs_client
*clp
= server
->nfs_client
;
5808 struct nfs4_session
*session
;
5809 unsigned int rsize
, wsize
;
5811 if (!nfs4_has_session(clp
))
5814 session
= clp
->cl_session
;
5815 spin_lock(&clp
->cl_lock
);
5816 if (test_and_clear_bit(NFS4_SESSION_INITING
, &session
->session_state
)) {
5818 rsize
= server
->rsize
;
5820 rsize
= NFS_MAX_FILE_IO_SIZE
;
5821 wsize
= server
->wsize
;
5823 wsize
= NFS_MAX_FILE_IO_SIZE
;
5825 session
->fc_attrs
.max_rqst_sz
= wsize
+ nfs41_maxwrite_overhead
;
5826 session
->fc_attrs
.max_resp_sz
= rsize
+ nfs41_maxread_overhead
;
5828 spin_unlock(&clp
->cl_lock
);
5830 return nfs41_check_session_ready(clp
);
5833 int nfs4_init_ds_session(struct nfs_client
*clp
, unsigned long lease_time
)
5835 struct nfs4_session
*session
= clp
->cl_session
;
5838 spin_lock(&clp
->cl_lock
);
5839 if (test_and_clear_bit(NFS4_SESSION_INITING
, &session
->session_state
)) {
5841 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
5842 * DS lease to be equal to the MDS lease.
5844 clp
->cl_lease_time
= lease_time
;
5845 clp
->cl_last_renewal
= jiffies
;
5847 spin_unlock(&clp
->cl_lock
);
5849 ret
= nfs41_check_session_ready(clp
);
5852 /* Test for the DS role */
5853 if (!is_ds_client(clp
))
5857 EXPORT_SYMBOL_GPL(nfs4_init_ds_session
);
5861 * Renew the cl_session lease.
5863 struct nfs4_sequence_data
{
5864 struct nfs_client
*clp
;
5865 struct nfs4_sequence_args args
;
5866 struct nfs4_sequence_res res
;
5869 static void nfs41_sequence_release(void *data
)
5871 struct nfs4_sequence_data
*calldata
= data
;
5872 struct nfs_client
*clp
= calldata
->clp
;
5874 if (atomic_read(&clp
->cl_count
) > 1)
5875 nfs4_schedule_state_renewal(clp
);
5876 nfs_put_client(clp
);
5880 static int nfs41_sequence_handle_errors(struct rpc_task
*task
, struct nfs_client
*clp
)
5882 switch(task
->tk_status
) {
5883 case -NFS4ERR_DELAY
:
5884 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
5887 nfs4_schedule_lease_recovery(clp
);
5892 static void nfs41_sequence_call_done(struct rpc_task
*task
, void *data
)
5894 struct nfs4_sequence_data
*calldata
= data
;
5895 struct nfs_client
*clp
= calldata
->clp
;
5897 if (!nfs41_sequence_done(task
, task
->tk_msg
.rpc_resp
))
5900 if (task
->tk_status
< 0) {
5901 dprintk("%s ERROR %d\n", __func__
, task
->tk_status
);
5902 if (atomic_read(&clp
->cl_count
) == 1)
5905 if (nfs41_sequence_handle_errors(task
, clp
) == -EAGAIN
) {
5906 rpc_restart_call_prepare(task
);
5910 dprintk("%s rpc_cred %p\n", __func__
, task
->tk_msg
.rpc_cred
);
5912 dprintk("<-- %s\n", __func__
);
5915 static void nfs41_sequence_prepare(struct rpc_task
*task
, void *data
)
5917 struct nfs4_sequence_data
*calldata
= data
;
5918 struct nfs_client
*clp
= calldata
->clp
;
5919 struct nfs4_sequence_args
*args
;
5920 struct nfs4_sequence_res
*res
;
5922 args
= task
->tk_msg
.rpc_argp
;
5923 res
= task
->tk_msg
.rpc_resp
;
5925 if (nfs41_setup_sequence(clp
->cl_session
, args
, res
, task
))
5927 rpc_call_start(task
);
5930 static const struct rpc_call_ops nfs41_sequence_ops
= {
5931 .rpc_call_done
= nfs41_sequence_call_done
,
5932 .rpc_call_prepare
= nfs41_sequence_prepare
,
5933 .rpc_release
= nfs41_sequence_release
,
5936 static struct rpc_task
*_nfs41_proc_sequence(struct nfs_client
*clp
, struct rpc_cred
*cred
)
5938 struct nfs4_sequence_data
*calldata
;
5939 struct rpc_message msg
= {
5940 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SEQUENCE
],
5943 struct rpc_task_setup task_setup_data
= {
5944 .rpc_client
= clp
->cl_rpcclient
,
5945 .rpc_message
= &msg
,
5946 .callback_ops
= &nfs41_sequence_ops
,
5947 .flags
= RPC_TASK_ASYNC
| RPC_TASK_SOFT
,
5950 if (!atomic_inc_not_zero(&clp
->cl_count
))
5951 return ERR_PTR(-EIO
);
5952 calldata
= kzalloc(sizeof(*calldata
), GFP_NOFS
);
5953 if (calldata
== NULL
) {
5954 nfs_put_client(clp
);
5955 return ERR_PTR(-ENOMEM
);
5957 nfs41_init_sequence(&calldata
->args
, &calldata
->res
, 0);
5958 msg
.rpc_argp
= &calldata
->args
;
5959 msg
.rpc_resp
= &calldata
->res
;
5960 calldata
->clp
= clp
;
5961 task_setup_data
.callback_data
= calldata
;
5963 return rpc_run_task(&task_setup_data
);
5966 static int nfs41_proc_async_sequence(struct nfs_client
*clp
, struct rpc_cred
*cred
, unsigned renew_flags
)
5968 struct rpc_task
*task
;
5971 if ((renew_flags
& NFS4_RENEW_TIMEOUT
) == 0)
5973 task
= _nfs41_proc_sequence(clp
, cred
);
5975 ret
= PTR_ERR(task
);
5977 rpc_put_task_async(task
);
5978 dprintk("<-- %s status=%d\n", __func__
, ret
);
5982 static int nfs4_proc_sequence(struct nfs_client
*clp
, struct rpc_cred
*cred
)
5984 struct rpc_task
*task
;
5987 task
= _nfs41_proc_sequence(clp
, cred
);
5989 ret
= PTR_ERR(task
);
5992 ret
= rpc_wait_for_completion_task(task
);
5994 struct nfs4_sequence_res
*res
= task
->tk_msg
.rpc_resp
;
5996 if (task
->tk_status
== 0)
5997 nfs41_handle_sequence_flag_errors(clp
, res
->sr_status_flags
);
5998 ret
= task
->tk_status
;
6002 dprintk("<-- %s status=%d\n", __func__
, ret
);
6006 struct nfs4_reclaim_complete_data
{
6007 struct nfs_client
*clp
;
6008 struct nfs41_reclaim_complete_args arg
;
6009 struct nfs41_reclaim_complete_res res
;
6012 static void nfs4_reclaim_complete_prepare(struct rpc_task
*task
, void *data
)
6014 struct nfs4_reclaim_complete_data
*calldata
= data
;
6016 rpc_task_set_priority(task
, RPC_PRIORITY_PRIVILEGED
);
6017 if (nfs41_setup_sequence(calldata
->clp
->cl_session
,
6018 &calldata
->arg
.seq_args
,
6019 &calldata
->res
.seq_res
, task
))
6022 rpc_call_start(task
);
6025 static int nfs41_reclaim_complete_handle_errors(struct rpc_task
*task
, struct nfs_client
*clp
)
6027 switch(task
->tk_status
) {
6029 case -NFS4ERR_COMPLETE_ALREADY
:
6030 case -NFS4ERR_WRONG_CRED
: /* What to do here? */
6032 case -NFS4ERR_DELAY
:
6033 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
6035 case -NFS4ERR_RETRY_UNCACHED_REP
:
6038 nfs4_schedule_lease_recovery(clp
);
6043 static void nfs4_reclaim_complete_done(struct rpc_task
*task
, void *data
)
6045 struct nfs4_reclaim_complete_data
*calldata
= data
;
6046 struct nfs_client
*clp
= calldata
->clp
;
6047 struct nfs4_sequence_res
*res
= &calldata
->res
.seq_res
;
6049 dprintk("--> %s\n", __func__
);
6050 if (!nfs41_sequence_done(task
, res
))
6053 if (nfs41_reclaim_complete_handle_errors(task
, clp
) == -EAGAIN
) {
6054 rpc_restart_call_prepare(task
);
6057 dprintk("<-- %s\n", __func__
);
6060 static void nfs4_free_reclaim_complete_data(void *data
)
6062 struct nfs4_reclaim_complete_data
*calldata
= data
;
6067 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops
= {
6068 .rpc_call_prepare
= nfs4_reclaim_complete_prepare
,
6069 .rpc_call_done
= nfs4_reclaim_complete_done
,
6070 .rpc_release
= nfs4_free_reclaim_complete_data
,
6074 * Issue a global reclaim complete.
6076 static int nfs41_proc_reclaim_complete(struct nfs_client
*clp
)
6078 struct nfs4_reclaim_complete_data
*calldata
;
6079 struct rpc_task
*task
;
6080 struct rpc_message msg
= {
6081 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RECLAIM_COMPLETE
],
6083 struct rpc_task_setup task_setup_data
= {
6084 .rpc_client
= clp
->cl_rpcclient
,
6085 .rpc_message
= &msg
,
6086 .callback_ops
= &nfs4_reclaim_complete_call_ops
,
6087 .flags
= RPC_TASK_ASYNC
,
6089 int status
= -ENOMEM
;
6091 dprintk("--> %s\n", __func__
);
6092 calldata
= kzalloc(sizeof(*calldata
), GFP_NOFS
);
6093 if (calldata
== NULL
)
6095 calldata
->clp
= clp
;
6096 calldata
->arg
.one_fs
= 0;
6098 nfs41_init_sequence(&calldata
->arg
.seq_args
, &calldata
->res
.seq_res
, 0);
6099 msg
.rpc_argp
= &calldata
->arg
;
6100 msg
.rpc_resp
= &calldata
->res
;
6101 task_setup_data
.callback_data
= calldata
;
6102 task
= rpc_run_task(&task_setup_data
);
6104 status
= PTR_ERR(task
);
6107 status
= nfs4_wait_for_completion_rpc_task(task
);
6109 status
= task
->tk_status
;
6113 dprintk("<-- %s status=%d\n", __func__
, status
);
6118 nfs4_layoutget_prepare(struct rpc_task
*task
, void *calldata
)
6120 struct nfs4_layoutget
*lgp
= calldata
;
6121 struct nfs_server
*server
= NFS_SERVER(lgp
->args
.inode
);
6123 dprintk("--> %s\n", __func__
);
6124 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6125 * right now covering the LAYOUTGET we are about to send.
6126 * However, that is not so catastrophic, and there seems
6127 * to be no way to prevent it completely.
6129 if (nfs4_setup_sequence(server
, &lgp
->args
.seq_args
,
6130 &lgp
->res
.seq_res
, task
))
6132 if (pnfs_choose_layoutget_stateid(&lgp
->args
.stateid
,
6133 NFS_I(lgp
->args
.inode
)->layout
,
6134 lgp
->args
.ctx
->state
)) {
6135 rpc_exit(task
, NFS4_OK
);
6138 rpc_call_start(task
);
6141 static void nfs4_layoutget_done(struct rpc_task
*task
, void *calldata
)
6143 struct nfs4_layoutget
*lgp
= calldata
;
6144 struct nfs_server
*server
= NFS_SERVER(lgp
->args
.inode
);
6146 dprintk("--> %s\n", __func__
);
6148 if (!nfs4_sequence_done(task
, &lgp
->res
.seq_res
))
6151 switch (task
->tk_status
) {
6154 case -NFS4ERR_LAYOUTTRYLATER
:
6155 case -NFS4ERR_RECALLCONFLICT
:
6156 task
->tk_status
= -NFS4ERR_DELAY
;
6159 if (nfs4_async_handle_error(task
, server
, NULL
) == -EAGAIN
) {
6160 rpc_restart_call_prepare(task
);
6164 dprintk("<-- %s\n", __func__
);
6167 static void nfs4_layoutget_release(void *calldata
)
6169 struct nfs4_layoutget
*lgp
= calldata
;
6171 dprintk("--> %s\n", __func__
);
6172 put_nfs_open_context(lgp
->args
.ctx
);
6174 dprintk("<-- %s\n", __func__
);
6177 static const struct rpc_call_ops nfs4_layoutget_call_ops
= {
6178 .rpc_call_prepare
= nfs4_layoutget_prepare
,
6179 .rpc_call_done
= nfs4_layoutget_done
,
6180 .rpc_release
= nfs4_layoutget_release
,
6183 int nfs4_proc_layoutget(struct nfs4_layoutget
*lgp
)
6185 struct nfs_server
*server
= NFS_SERVER(lgp
->args
.inode
);
6186 struct rpc_task
*task
;
6187 struct rpc_message msg
= {
6188 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LAYOUTGET
],
6189 .rpc_argp
= &lgp
->args
,
6190 .rpc_resp
= &lgp
->res
,
6192 struct rpc_task_setup task_setup_data
= {
6193 .rpc_client
= server
->client
,
6194 .rpc_message
= &msg
,
6195 .callback_ops
= &nfs4_layoutget_call_ops
,
6196 .callback_data
= lgp
,
6197 .flags
= RPC_TASK_ASYNC
,
6201 dprintk("--> %s\n", __func__
);
6203 lgp
->res
.layoutp
= &lgp
->args
.layout
;
6204 lgp
->res
.seq_res
.sr_slot
= NULL
;
6205 nfs41_init_sequence(&lgp
->args
.seq_args
, &lgp
->res
.seq_res
, 0);
6206 task
= rpc_run_task(&task_setup_data
);
6208 return PTR_ERR(task
);
6209 status
= nfs4_wait_for_completion_rpc_task(task
);
6211 status
= task
->tk_status
;
6213 status
= pnfs_layout_process(lgp
);
6215 dprintk("<-- %s status=%d\n", __func__
, status
);
6220 nfs4_layoutreturn_prepare(struct rpc_task
*task
, void *calldata
)
6222 struct nfs4_layoutreturn
*lrp
= calldata
;
6224 dprintk("--> %s\n", __func__
);
6225 if (nfs41_setup_sequence(lrp
->clp
->cl_session
, &lrp
->args
.seq_args
,
6226 &lrp
->res
.seq_res
, task
))
6228 rpc_call_start(task
);
6231 static void nfs4_layoutreturn_done(struct rpc_task
*task
, void *calldata
)
6233 struct nfs4_layoutreturn
*lrp
= calldata
;
6234 struct nfs_server
*server
;
6235 struct pnfs_layout_hdr
*lo
= lrp
->args
.layout
;
6237 dprintk("--> %s\n", __func__
);
6239 if (!nfs4_sequence_done(task
, &lrp
->res
.seq_res
))
6242 server
= NFS_SERVER(lrp
->args
.inode
);
6243 if (nfs4_async_handle_error(task
, server
, NULL
) == -EAGAIN
) {
6244 rpc_restart_call_prepare(task
);
6247 spin_lock(&lo
->plh_inode
->i_lock
);
6248 if (task
->tk_status
== 0) {
6249 if (lrp
->res
.lrs_present
) {
6250 pnfs_set_layout_stateid(lo
, &lrp
->res
.stateid
, true);
6252 BUG_ON(!list_empty(&lo
->plh_segs
));
6254 lo
->plh_block_lgets
--;
6255 spin_unlock(&lo
->plh_inode
->i_lock
);
6256 dprintk("<-- %s\n", __func__
);
6259 static void nfs4_layoutreturn_release(void *calldata
)
6261 struct nfs4_layoutreturn
*lrp
= calldata
;
6263 dprintk("--> %s\n", __func__
);
6264 put_layout_hdr(lrp
->args
.layout
);
6266 dprintk("<-- %s\n", __func__
);
6269 static const struct rpc_call_ops nfs4_layoutreturn_call_ops
= {
6270 .rpc_call_prepare
= nfs4_layoutreturn_prepare
,
6271 .rpc_call_done
= nfs4_layoutreturn_done
,
6272 .rpc_release
= nfs4_layoutreturn_release
,
6275 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn
*lrp
)
6277 struct rpc_task
*task
;
6278 struct rpc_message msg
= {
6279 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LAYOUTRETURN
],
6280 .rpc_argp
= &lrp
->args
,
6281 .rpc_resp
= &lrp
->res
,
6283 struct rpc_task_setup task_setup_data
= {
6284 .rpc_client
= lrp
->clp
->cl_rpcclient
,
6285 .rpc_message
= &msg
,
6286 .callback_ops
= &nfs4_layoutreturn_call_ops
,
6287 .callback_data
= lrp
,
6291 dprintk("--> %s\n", __func__
);
6292 nfs41_init_sequence(&lrp
->args
.seq_args
, &lrp
->res
.seq_res
, 1);
6293 task
= rpc_run_task(&task_setup_data
);
6295 return PTR_ERR(task
);
6296 status
= task
->tk_status
;
6297 dprintk("<-- %s status=%d\n", __func__
, status
);
6303 * Retrieve the list of Data Server devices from the MDS.
6305 static int _nfs4_getdevicelist(struct nfs_server
*server
,
6306 const struct nfs_fh
*fh
,
6307 struct pnfs_devicelist
*devlist
)
6309 struct nfs4_getdevicelist_args args
= {
6311 .layoutclass
= server
->pnfs_curr_ld
->id
,
6313 struct nfs4_getdevicelist_res res
= {
6316 struct rpc_message msg
= {
6317 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETDEVICELIST
],
6323 dprintk("--> %s\n", __func__
);
6324 status
= nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
,
6326 dprintk("<-- %s status=%d\n", __func__
, status
);
6330 int nfs4_proc_getdevicelist(struct nfs_server
*server
,
6331 const struct nfs_fh
*fh
,
6332 struct pnfs_devicelist
*devlist
)
6334 struct nfs4_exception exception
= { };
6338 err
= nfs4_handle_exception(server
,
6339 _nfs4_getdevicelist(server
, fh
, devlist
),
6341 } while (exception
.retry
);
6343 dprintk("%s: err=%d, num_devs=%u\n", __func__
,
6344 err
, devlist
->num_devs
);
6348 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist
);
6351 _nfs4_proc_getdeviceinfo(struct nfs_server
*server
, struct pnfs_device
*pdev
)
6353 struct nfs4_getdeviceinfo_args args
= {
6356 struct nfs4_getdeviceinfo_res res
= {
6359 struct rpc_message msg
= {
6360 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETDEVICEINFO
],
6366 dprintk("--> %s\n", __func__
);
6367 status
= nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
6368 dprintk("<-- %s status=%d\n", __func__
, status
);
6373 int nfs4_proc_getdeviceinfo(struct nfs_server
*server
, struct pnfs_device
*pdev
)
6375 struct nfs4_exception exception
= { };
6379 err
= nfs4_handle_exception(server
,
6380 _nfs4_proc_getdeviceinfo(server
, pdev
),
6382 } while (exception
.retry
);
6385 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo
);
6387 static void nfs4_layoutcommit_prepare(struct rpc_task
*task
, void *calldata
)
6389 struct nfs4_layoutcommit_data
*data
= calldata
;
6390 struct nfs_server
*server
= NFS_SERVER(data
->args
.inode
);
6392 if (nfs4_setup_sequence(server
, &data
->args
.seq_args
,
6393 &data
->res
.seq_res
, task
))
6395 rpc_call_start(task
);
6399 nfs4_layoutcommit_done(struct rpc_task
*task
, void *calldata
)
6401 struct nfs4_layoutcommit_data
*data
= calldata
;
6402 struct nfs_server
*server
= NFS_SERVER(data
->args
.inode
);
6404 if (!nfs4_sequence_done(task
, &data
->res
.seq_res
))
6407 switch (task
->tk_status
) { /* Just ignore these failures */
6408 case -NFS4ERR_DELEG_REVOKED
: /* layout was recalled */
6409 case -NFS4ERR_BADIOMODE
: /* no IOMODE_RW layout for range */
6410 case -NFS4ERR_BADLAYOUT
: /* no layout */
6411 case -NFS4ERR_GRACE
: /* loca_recalim always false */
6412 task
->tk_status
= 0;
6415 nfs_post_op_update_inode_force_wcc(data
->args
.inode
,
6419 if (nfs4_async_handle_error(task
, server
, NULL
) == -EAGAIN
) {
6420 rpc_restart_call_prepare(task
);
6426 static void nfs4_layoutcommit_release(void *calldata
)
6428 struct nfs4_layoutcommit_data
*data
= calldata
;
6429 struct pnfs_layout_segment
*lseg
, *tmp
;
6430 unsigned long *bitlock
= &NFS_I(data
->args
.inode
)->flags
;
6432 pnfs_cleanup_layoutcommit(data
);
6433 /* Matched by references in pnfs_set_layoutcommit */
6434 list_for_each_entry_safe(lseg
, tmp
, &data
->lseg_list
, pls_lc_list
) {
6435 list_del_init(&lseg
->pls_lc_list
);
6436 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT
,
6441 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING
, bitlock
);
6442 smp_mb__after_clear_bit();
6443 wake_up_bit(bitlock
, NFS_INO_LAYOUTCOMMITTING
);
6445 put_rpccred(data
->cred
);
6449 static const struct rpc_call_ops nfs4_layoutcommit_ops
= {
6450 .rpc_call_prepare
= nfs4_layoutcommit_prepare
,
6451 .rpc_call_done
= nfs4_layoutcommit_done
,
6452 .rpc_release
= nfs4_layoutcommit_release
,
6456 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data
*data
, bool sync
)
6458 struct rpc_message msg
= {
6459 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LAYOUTCOMMIT
],
6460 .rpc_argp
= &data
->args
,
6461 .rpc_resp
= &data
->res
,
6462 .rpc_cred
= data
->cred
,
6464 struct rpc_task_setup task_setup_data
= {
6465 .task
= &data
->task
,
6466 .rpc_client
= NFS_CLIENT(data
->args
.inode
),
6467 .rpc_message
= &msg
,
6468 .callback_ops
= &nfs4_layoutcommit_ops
,
6469 .callback_data
= data
,
6470 .flags
= RPC_TASK_ASYNC
,
6472 struct rpc_task
*task
;
6475 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6476 "lbw: %llu inode %lu\n",
6477 data
->task
.tk_pid
, sync
,
6478 data
->args
.lastbytewritten
,
6479 data
->args
.inode
->i_ino
);
6481 nfs41_init_sequence(&data
->args
.seq_args
, &data
->res
.seq_res
, 1);
6482 task
= rpc_run_task(&task_setup_data
);
6484 return PTR_ERR(task
);
6487 status
= nfs4_wait_for_completion_rpc_task(task
);
6490 status
= task
->tk_status
;
6492 dprintk("%s: status %d\n", __func__
, status
);
6498 _nfs41_proc_secinfo_no_name(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
6499 struct nfs_fsinfo
*info
, struct nfs4_secinfo_flavors
*flavors
)
6501 struct nfs41_secinfo_no_name_args args
= {
6502 .style
= SECINFO_STYLE_CURRENT_FH
,
6504 struct nfs4_secinfo_res res
= {
6507 struct rpc_message msg
= {
6508 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SECINFO_NO_NAME
],
6512 return nfs4_call_sync(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 0);
6516 nfs41_proc_secinfo_no_name(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
6517 struct nfs_fsinfo
*info
, struct nfs4_secinfo_flavors
*flavors
)
6519 struct nfs4_exception exception
= { };
6522 err
= _nfs41_proc_secinfo_no_name(server
, fhandle
, info
, flavors
);
6525 case -NFS4ERR_WRONGSEC
:
6526 case -NFS4ERR_NOTSUPP
:
6529 err
= nfs4_handle_exception(server
, err
, &exception
);
6531 } while (exception
.retry
);
6537 nfs41_find_root_sec(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
6538 struct nfs_fsinfo
*info
)
6542 rpc_authflavor_t flavor
;
6543 struct nfs4_secinfo_flavors
*flavors
;
6545 page
= alloc_page(GFP_KERNEL
);
6551 flavors
= page_address(page
);
6552 err
= nfs41_proc_secinfo_no_name(server
, fhandle
, info
, flavors
);
6555 * Fall back on "guess and check" method if
6556 * the server doesn't support SECINFO_NO_NAME
6558 if (err
== -NFS4ERR_WRONGSEC
|| err
== -NFS4ERR_NOTSUPP
) {
6559 err
= nfs4_find_root_sec(server
, fhandle
, info
);
6565 flavor
= nfs_find_best_sec(flavors
);
6567 err
= nfs4_lookup_root_sec(server
, fhandle
, info
, flavor
);
6577 static int _nfs41_test_stateid(struct nfs_server
*server
, nfs4_stateid
*stateid
)
6580 struct nfs41_test_stateid_args args
= {
6583 struct nfs41_test_stateid_res res
;
6584 struct rpc_message msg
= {
6585 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_TEST_STATEID
],
6590 nfs41_init_sequence(&args
.seq_args
, &res
.seq_res
, 0);
6591 status
= nfs4_call_sync_sequence(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 1);
6593 if (status
== NFS_OK
)
6598 static int nfs41_test_stateid(struct nfs_server
*server
, nfs4_stateid
*stateid
)
6600 struct nfs4_exception exception
= { };
6603 err
= nfs4_handle_exception(server
,
6604 _nfs41_test_stateid(server
, stateid
),
6606 } while (exception
.retry
);
6610 static int _nfs4_free_stateid(struct nfs_server
*server
, nfs4_stateid
*stateid
)
6612 struct nfs41_free_stateid_args args
= {
6615 struct nfs41_free_stateid_res res
;
6616 struct rpc_message msg
= {
6617 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FREE_STATEID
],
6622 nfs41_init_sequence(&args
.seq_args
, &res
.seq_res
, 0);
6623 return nfs4_call_sync_sequence(server
->client
, server
, &msg
, &args
.seq_args
, &res
.seq_res
, 1);
6626 static int nfs41_free_stateid(struct nfs_server
*server
, nfs4_stateid
*stateid
)
6628 struct nfs4_exception exception
= { };
6631 err
= nfs4_handle_exception(server
,
6632 _nfs4_free_stateid(server
, stateid
),
6634 } while (exception
.retry
);
6638 static bool nfs41_match_stateid(const nfs4_stateid
*s1
,
6639 const nfs4_stateid
*s2
)
6641 if (memcmp(s1
->other
, s2
->other
, sizeof(s1
->other
)) != 0)
6644 if (s1
->seqid
== s2
->seqid
)
6646 if (s1
->seqid
== 0 || s2
->seqid
== 0)
6652 #endif /* CONFIG_NFS_V4_1 */
6654 static bool nfs4_match_stateid(const nfs4_stateid
*s1
,
6655 const nfs4_stateid
*s2
)
6657 return nfs4_stateid_match(s1
, s2
);
6661 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops
= {
6662 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
6663 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
6664 .recover_open
= nfs4_open_reclaim
,
6665 .recover_lock
= nfs4_lock_reclaim
,
6666 .establish_clid
= nfs4_init_clientid
,
6667 .get_clid_cred
= nfs4_get_setclientid_cred
,
6670 #if defined(CONFIG_NFS_V4_1)
6671 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops
= {
6672 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
6673 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
6674 .recover_open
= nfs4_open_reclaim
,
6675 .recover_lock
= nfs4_lock_reclaim
,
6676 .establish_clid
= nfs41_init_clientid
,
6677 .get_clid_cred
= nfs4_get_exchange_id_cred
,
6678 .reclaim_complete
= nfs41_proc_reclaim_complete
,
6680 #endif /* CONFIG_NFS_V4_1 */
6682 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops
= {
6683 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
6684 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
6685 .recover_open
= nfs4_open_expired
,
6686 .recover_lock
= nfs4_lock_expired
,
6687 .establish_clid
= nfs4_init_clientid
,
6688 .get_clid_cred
= nfs4_get_setclientid_cred
,
6691 #if defined(CONFIG_NFS_V4_1)
6692 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops
= {
6693 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
6694 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
6695 .recover_open
= nfs41_open_expired
,
6696 .recover_lock
= nfs41_lock_expired
,
6697 .establish_clid
= nfs41_init_clientid
,
6698 .get_clid_cred
= nfs4_get_exchange_id_cred
,
6700 #endif /* CONFIG_NFS_V4_1 */
6702 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops
= {
6703 .sched_state_renewal
= nfs4_proc_async_renew
,
6704 .get_state_renewal_cred_locked
= nfs4_get_renew_cred_locked
,
6705 .renew_lease
= nfs4_proc_renew
,
6708 #if defined(CONFIG_NFS_V4_1)
6709 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops
= {
6710 .sched_state_renewal
= nfs41_proc_async_sequence
,
6711 .get_state_renewal_cred_locked
= nfs4_get_machine_cred_locked
,
6712 .renew_lease
= nfs4_proc_sequence
,
6716 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops
= {
6718 .call_sync
= _nfs4_call_sync
,
6719 .match_stateid
= nfs4_match_stateid
,
6720 .find_root_sec
= nfs4_find_root_sec
,
6721 .reboot_recovery_ops
= &nfs40_reboot_recovery_ops
,
6722 .nograce_recovery_ops
= &nfs40_nograce_recovery_ops
,
6723 .state_renewal_ops
= &nfs40_state_renewal_ops
,
6726 #if defined(CONFIG_NFS_V4_1)
6727 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops
= {
6729 .call_sync
= _nfs4_call_sync_session
,
6730 .match_stateid
= nfs41_match_stateid
,
6731 .find_root_sec
= nfs41_find_root_sec
,
6732 .reboot_recovery_ops
= &nfs41_reboot_recovery_ops
,
6733 .nograce_recovery_ops
= &nfs41_nograce_recovery_ops
,
6734 .state_renewal_ops
= &nfs41_state_renewal_ops
,
6738 const struct nfs4_minor_version_ops
*nfs_v4_minor_ops
[] = {
6739 [0] = &nfs_v4_0_minor_ops
,
6740 #if defined(CONFIG_NFS_V4_1)
6741 [1] = &nfs_v4_1_minor_ops
,
6745 static const struct inode_operations nfs4_file_inode_operations
= {
6746 .permission
= nfs_permission
,
6747 .getattr
= nfs_getattr
,
6748 .setattr
= nfs_setattr
,
6749 .getxattr
= generic_getxattr
,
6750 .setxattr
= generic_setxattr
,
6751 .listxattr
= generic_listxattr
,
6752 .removexattr
= generic_removexattr
,
6755 const struct nfs_rpc_ops nfs_v4_clientops
= {
6756 .version
= 4, /* protocol version */
6757 .dentry_ops
= &nfs4_dentry_operations
,
6758 .dir_inode_ops
= &nfs4_dir_inode_operations
,
6759 .file_inode_ops
= &nfs4_file_inode_operations
,
6760 .file_ops
= &nfs4_file_operations
,
6761 .getroot
= nfs4_proc_get_root
,
6762 .submount
= nfs4_submount
,
6763 .getattr
= nfs4_proc_getattr
,
6764 .setattr
= nfs4_proc_setattr
,
6765 .lookup
= nfs4_proc_lookup
,
6766 .access
= nfs4_proc_access
,
6767 .readlink
= nfs4_proc_readlink
,
6768 .create
= nfs4_proc_create
,
6769 .remove
= nfs4_proc_remove
,
6770 .unlink_setup
= nfs4_proc_unlink_setup
,
6771 .unlink_rpc_prepare
= nfs4_proc_unlink_rpc_prepare
,
6772 .unlink_done
= nfs4_proc_unlink_done
,
6773 .rename
= nfs4_proc_rename
,
6774 .rename_setup
= nfs4_proc_rename_setup
,
6775 .rename_rpc_prepare
= nfs4_proc_rename_rpc_prepare
,
6776 .rename_done
= nfs4_proc_rename_done
,
6777 .link
= nfs4_proc_link
,
6778 .symlink
= nfs4_proc_symlink
,
6779 .mkdir
= nfs4_proc_mkdir
,
6780 .rmdir
= nfs4_proc_remove
,
6781 .readdir
= nfs4_proc_readdir
,
6782 .mknod
= nfs4_proc_mknod
,
6783 .statfs
= nfs4_proc_statfs
,
6784 .fsinfo
= nfs4_proc_fsinfo
,
6785 .pathconf
= nfs4_proc_pathconf
,
6786 .set_capabilities
= nfs4_server_capabilities
,
6787 .decode_dirent
= nfs4_decode_dirent
,
6788 .read_setup
= nfs4_proc_read_setup
,
6789 .read_rpc_prepare
= nfs4_proc_read_rpc_prepare
,
6790 .read_done
= nfs4_read_done
,
6791 .write_setup
= nfs4_proc_write_setup
,
6792 .write_rpc_prepare
= nfs4_proc_write_rpc_prepare
,
6793 .write_done
= nfs4_write_done
,
6794 .commit_setup
= nfs4_proc_commit_setup
,
6795 .commit_rpc_prepare
= nfs4_proc_commit_rpc_prepare
,
6796 .commit_done
= nfs4_commit_done
,
6797 .lock
= nfs4_proc_lock
,
6798 .clear_acl_cache
= nfs4_zap_acl_attr
,
6799 .close_context
= nfs4_close_context
,
6800 .open_context
= nfs4_atomic_open
,
6801 .init_client
= nfs4_init_client
,
6804 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler
= {
6805 .prefix
= XATTR_NAME_NFSV4_ACL
,
6806 .list
= nfs4_xattr_list_nfs4_acl
,
6807 .get
= nfs4_xattr_get_nfs4_acl
,
6808 .set
= nfs4_xattr_set_nfs4_acl
,
6811 const struct xattr_handler
*nfs4_xattr_handlers
[] = {
6812 &nfs4_xattr_nfs4_acl_handler
,
6816 module_param(max_session_slots
, ushort
, 0644);
6817 MODULE_PARM_DESC(max_session_slots
, "Maximum number of outstanding NFSv4.1 "
6818 "requests the client will negotiate");