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/utsname.h>
40 #include <linux/delay.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/smp_lock.h>
49 #include <linux/namei.h>
50 #include <linux/mount.h>
53 #include "delegation.h"
57 #define NFSDBG_FACILITY NFSDBG_PROC
59 #define NFS4_POLL_RETRY_MIN (HZ/10)
60 #define NFS4_POLL_RETRY_MAX (15*HZ)
63 static int _nfs4_proc_open(struct nfs4_opendata
*data
);
64 static int nfs4_do_fsinfo(struct nfs_server
*, struct nfs_fh
*, struct nfs_fsinfo
*);
65 static int nfs4_async_handle_error(struct rpc_task
*, const struct nfs_server
*, struct nfs4_state
*);
66 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
67 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
69 /* Prevent leaks of NFSv4 errors into userland */
70 static int nfs4_map_errors(int err
)
73 dprintk("%s could not handle NFSv4 error %d\n",
81 * This is our standard bitmap for GETATTR requests.
83 const u32 nfs4_fattr_bitmap
[2] = {
88 | FATTR4_WORD0_FILEID
,
90 | FATTR4_WORD1_NUMLINKS
92 | FATTR4_WORD1_OWNER_GROUP
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
100 const u32 nfs4_statfs_bitmap
[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL
,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
109 const u32 nfs4_pathconf_bitmap
[2] = {
111 | FATTR4_WORD0_MAXNAME
,
115 const u32 nfs4_fsinfo_bitmap
[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME
,
122 const u32 nfs4_fs_locations_bitmap
[2] = {
124 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS
,
130 | FATTR4_WORD1_NUMLINKS
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
141 static void nfs4_setup_readdir(u64 cookie
, __be32
*verifier
, struct dentry
*dentry
,
142 struct nfs4_readdir_arg
*readdir
)
146 BUG_ON(readdir
->count
< 80);
148 readdir
->cookie
= cookie
;
149 memcpy(&readdir
->verifier
, verifier
, sizeof(readdir
->verifier
));
154 memset(&readdir
->verifier
, 0, sizeof(readdir
->verifier
));
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
165 start
= p
= kmap_atomic(*readdir
->pages
, KM_USER0
);
168 *p
++ = xdr_one
; /* next */
169 *p
++ = xdr_zero
; /* cookie, first word */
170 *p
++ = xdr_one
; /* cookie, second word */
171 *p
++ = xdr_one
; /* entry len */
172 memcpy(p
, ".\0\0\0", 4); /* entry */
174 *p
++ = xdr_one
; /* bitmap length */
175 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
176 *p
++ = htonl(8); /* attribute buffer length */
177 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_inode
));
180 *p
++ = xdr_one
; /* next */
181 *p
++ = xdr_zero
; /* cookie, first word */
182 *p
++ = xdr_two
; /* cookie, second word */
183 *p
++ = xdr_two
; /* entry len */
184 memcpy(p
, "..\0\0", 4); /* entry */
186 *p
++ = xdr_one
; /* bitmap length */
187 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
188 *p
++ = htonl(8); /* attribute buffer length */
189 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_parent
->d_inode
));
191 readdir
->pgbase
= (char *)p
- (char *)start
;
192 readdir
->count
-= readdir
->pgbase
;
193 kunmap_atomic(start
, KM_USER0
);
196 static int nfs4_wait_clnt_recover(struct nfs_client
*clp
)
202 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
,
203 nfs_wait_bit_killable
, TASK_KILLABLE
);
207 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
214 *timeout
= NFS4_POLL_RETRY_MIN
;
215 if (*timeout
> NFS4_POLL_RETRY_MAX
)
216 *timeout
= NFS4_POLL_RETRY_MAX
;
217 schedule_timeout_killable(*timeout
);
218 if (fatal_signal_pending(current
))
224 /* This is the error handling routine for processes that are allowed
227 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
229 struct nfs_client
*clp
= server
->nfs_client
;
230 struct nfs4_state
*state
= exception
->state
;
233 exception
->retry
= 0;
237 case -NFS4ERR_ADMIN_REVOKED
:
238 case -NFS4ERR_BAD_STATEID
:
239 case -NFS4ERR_OPENMODE
:
242 nfs4_state_mark_reclaim_nograce(clp
, state
);
243 case -NFS4ERR_STALE_CLIENTID
:
244 case -NFS4ERR_STALE_STATEID
:
245 case -NFS4ERR_EXPIRED
:
246 nfs4_schedule_state_recovery(clp
);
247 ret
= nfs4_wait_clnt_recover(clp
);
249 exception
->retry
= 1;
251 case -NFS4ERR_FILE_OPEN
:
254 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
257 case -NFS4ERR_OLD_STATEID
:
258 exception
->retry
= 1;
260 /* We failed to handle the error */
261 return nfs4_map_errors(ret
);
265 static void renew_lease(const struct nfs_server
*server
, unsigned long timestamp
)
267 struct nfs_client
*clp
= server
->nfs_client
;
268 spin_lock(&clp
->cl_lock
);
269 if (time_before(clp
->cl_last_renewal
,timestamp
))
270 clp
->cl_last_renewal
= timestamp
;
271 spin_unlock(&clp
->cl_lock
);
274 #if defined(CONFIG_NFS_V4_1)
277 * nfs4_free_slot - free a slot and efficiently update slot table.
279 * freeing a slot is trivially done by clearing its respective bit
281 * If the freed slotid equals highest_used_slotid we want to update it
282 * so that the server would be able to size down the slot table if needed,
283 * otherwise we know that the highest_used_slotid is still in use.
284 * When updating highest_used_slotid there may be "holes" in the bitmap
285 * so we need to scan down from highest_used_slotid to 0 looking for the now
286 * highest slotid in use.
287 * If none found, highest_used_slotid is set to -1.
290 nfs4_free_slot(struct nfs4_slot_table
*tbl
, u8 free_slotid
)
292 int slotid
= free_slotid
;
294 spin_lock(&tbl
->slot_tbl_lock
);
295 /* clear used bit in bitmap */
296 __clear_bit(slotid
, tbl
->used_slots
);
298 /* update highest_used_slotid when it is freed */
299 if (slotid
== tbl
->highest_used_slotid
) {
300 slotid
= find_last_bit(tbl
->used_slots
, tbl
->max_slots
);
301 if (slotid
>= 0 && slotid
< tbl
->max_slots
)
302 tbl
->highest_used_slotid
= slotid
;
304 tbl
->highest_used_slotid
= -1;
306 rpc_wake_up_next(&tbl
->slot_tbl_waitq
);
307 spin_unlock(&tbl
->slot_tbl_lock
);
308 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__
,
309 free_slotid
, tbl
->highest_used_slotid
);
312 void nfs41_sequence_free_slot(const struct nfs_client
*clp
,
313 struct nfs4_sequence_res
*res
)
315 struct nfs4_slot_table
*tbl
;
317 if (!nfs4_has_session(clp
)) {
318 dprintk("%s: No session\n", __func__
);
321 tbl
= &clp
->cl_session
->fc_slot_table
;
322 if (res
->sr_slotid
== NFS4_MAX_SLOT_TABLE
) {
323 dprintk("%s: No slot\n", __func__
);
324 /* just wake up the next guy waiting since
325 * we may have not consumed a slot after all */
326 rpc_wake_up_next(&tbl
->slot_tbl_waitq
);
329 nfs4_free_slot(tbl
, res
->sr_slotid
);
330 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
333 static void nfs41_sequence_done(struct nfs_client
*clp
,
334 struct nfs4_sequence_res
*res
,
337 unsigned long timestamp
;
338 struct nfs4_slot_table
*tbl
;
339 struct nfs4_slot
*slot
;
342 * sr_status remains 1 if an RPC level error occurred. The server
343 * may or may not have processed the sequence operation..
344 * Proceed as if the server received and processed the sequence
347 if (res
->sr_status
== 1)
348 res
->sr_status
= NFS_OK
;
350 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
351 if (res
->sr_slotid
== NFS4_MAX_SLOT_TABLE
)
354 tbl
= &clp
->cl_session
->fc_slot_table
;
355 slot
= tbl
->slots
+ res
->sr_slotid
;
357 if (res
->sr_status
== 0) {
358 /* Update the slot's sequence and clientid lease timer */
360 timestamp
= res
->sr_renewal_time
;
361 spin_lock(&clp
->cl_lock
);
362 if (time_before(clp
->cl_last_renewal
, timestamp
))
363 clp
->cl_last_renewal
= timestamp
;
364 spin_unlock(&clp
->cl_lock
);
368 /* The session may be reset by one of the error handlers. */
369 dprintk("%s: Error %d free the slot \n", __func__
, res
->sr_status
);
370 nfs41_sequence_free_slot(clp
, res
);
374 * nfs4_find_slot - efficiently look for a free slot
376 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
377 * If found, we mark the slot as used, update the highest_used_slotid,
378 * and respectively set up the sequence operation args.
379 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
381 * Note: must be called with under the slot_tbl_lock.
384 nfs4_find_slot(struct nfs4_slot_table
*tbl
, struct rpc_task
*task
)
387 u8 ret_id
= NFS4_MAX_SLOT_TABLE
;
388 BUILD_BUG_ON((u8
)NFS4_MAX_SLOT_TABLE
!= (int)NFS4_MAX_SLOT_TABLE
);
390 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
391 __func__
, tbl
->used_slots
[0], tbl
->highest_used_slotid
,
393 slotid
= find_first_zero_bit(tbl
->used_slots
, tbl
->max_slots
);
394 if (slotid
>= tbl
->max_slots
)
396 __set_bit(slotid
, tbl
->used_slots
);
397 if (slotid
> tbl
->highest_used_slotid
)
398 tbl
->highest_used_slotid
= slotid
;
401 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
402 __func__
, tbl
->used_slots
[0], tbl
->highest_used_slotid
, ret_id
);
406 static int nfs41_setup_sequence(struct nfs4_session
*session
,
407 struct nfs4_sequence_args
*args
,
408 struct nfs4_sequence_res
*res
,
410 struct rpc_task
*task
)
412 struct nfs4_slot
*slot
;
413 struct nfs4_slot_table
*tbl
;
416 dprintk("--> %s\n", __func__
);
417 /* slot already allocated? */
418 if (res
->sr_slotid
!= NFS4_MAX_SLOT_TABLE
)
421 memset(res
, 0, sizeof(*res
));
422 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
423 tbl
= &session
->fc_slot_table
;
425 spin_lock(&tbl
->slot_tbl_lock
);
426 slotid
= nfs4_find_slot(tbl
, task
);
427 if (slotid
== NFS4_MAX_SLOT_TABLE
) {
428 rpc_sleep_on(&tbl
->slot_tbl_waitq
, task
, NULL
);
429 spin_unlock(&tbl
->slot_tbl_lock
);
430 dprintk("<-- %s: no free slots\n", __func__
);
433 spin_unlock(&tbl
->slot_tbl_lock
);
435 slot
= tbl
->slots
+ slotid
;
436 args
->sa_slotid
= slotid
;
437 args
->sa_cache_this
= cache_reply
;
439 dprintk("<-- %s slotid=%d seqid=%d\n", __func__
, slotid
, slot
->seq_nr
);
441 res
->sr_slotid
= slotid
;
442 res
->sr_renewal_time
= jiffies
;
444 * sr_status is only set in decode_sequence, and so will remain
445 * set to 1 if an rpc level failure occurs.
451 int nfs4_setup_sequence(struct nfs_client
*clp
,
452 struct nfs4_sequence_args
*args
,
453 struct nfs4_sequence_res
*res
,
455 struct rpc_task
*task
)
459 dprintk("--> %s clp %p session %p sr_slotid %d\n",
460 __func__
, clp
, clp
->cl_session
, res
->sr_slotid
);
462 if (!nfs4_has_session(clp
))
464 ret
= nfs41_setup_sequence(clp
->cl_session
, args
, res
, cache_reply
,
466 if (ret
!= -EAGAIN
) {
467 /* terminate rpc task */
468 task
->tk_status
= ret
;
469 task
->tk_action
= NULL
;
472 dprintk("<-- %s status=%d\n", __func__
, ret
);
476 struct nfs41_call_sync_data
{
477 struct nfs_client
*clp
;
478 struct nfs4_sequence_args
*seq_args
;
479 struct nfs4_sequence_res
*seq_res
;
483 static void nfs41_call_sync_prepare(struct rpc_task
*task
, void *calldata
)
485 struct nfs41_call_sync_data
*data
= calldata
;
487 dprintk("--> %s data->clp->cl_session %p\n", __func__
,
488 data
->clp
->cl_session
);
489 if (nfs4_setup_sequence(data
->clp
, data
->seq_args
,
490 data
->seq_res
, data
->cache_reply
, task
))
492 rpc_call_start(task
);
495 static void nfs41_call_sync_done(struct rpc_task
*task
, void *calldata
)
497 struct nfs41_call_sync_data
*data
= calldata
;
499 nfs41_sequence_done(data
->clp
, data
->seq_res
, task
->tk_status
);
500 nfs41_sequence_free_slot(data
->clp
, data
->seq_res
);
503 struct rpc_call_ops nfs41_call_sync_ops
= {
504 .rpc_call_prepare
= nfs41_call_sync_prepare
,
505 .rpc_call_done
= nfs41_call_sync_done
,
508 static int nfs4_call_sync_sequence(struct nfs_client
*clp
,
509 struct rpc_clnt
*clnt
,
510 struct rpc_message
*msg
,
511 struct nfs4_sequence_args
*args
,
512 struct nfs4_sequence_res
*res
,
516 struct rpc_task
*task
;
517 struct nfs41_call_sync_data data
= {
521 .cache_reply
= cache_reply
,
523 struct rpc_task_setup task_setup
= {
526 .callback_ops
= &nfs41_call_sync_ops
,
527 .callback_data
= &data
530 res
->sr_slotid
= NFS4_MAX_SLOT_TABLE
;
531 task
= rpc_run_task(&task_setup
);
535 ret
= task
->tk_status
;
541 int _nfs4_call_sync_session(struct nfs_server
*server
,
542 struct rpc_message
*msg
,
543 struct nfs4_sequence_args
*args
,
544 struct nfs4_sequence_res
*res
,
547 return nfs4_call_sync_sequence(server
->nfs_client
, server
->client
,
548 msg
, args
, res
, cache_reply
);
551 #endif /* CONFIG_NFS_V4_1 */
553 int _nfs4_call_sync(struct nfs_server
*server
,
554 struct rpc_message
*msg
,
555 struct nfs4_sequence_args
*args
,
556 struct nfs4_sequence_res
*res
,
559 args
->sa_session
= res
->sr_session
= NULL
;
560 return rpc_call_sync(server
->client
, msg
, 0);
563 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
564 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
565 &(res)->seq_res, (cache_reply))
567 static void nfs4_sequence_done(const struct nfs_server
*server
,
568 struct nfs4_sequence_res
*res
, int rpc_status
)
570 #ifdef CONFIG_NFS_V4_1
571 if (nfs4_has_session(server
->nfs_client
))
572 nfs41_sequence_done(server
->nfs_client
, res
, rpc_status
);
573 #endif /* CONFIG_NFS_V4_1 */
576 /* no restart, therefore free slot here */
577 static void nfs4_sequence_done_free_slot(const struct nfs_server
*server
,
578 struct nfs4_sequence_res
*res
,
581 nfs4_sequence_done(server
, res
, rpc_status
);
582 nfs4_sequence_free_slot(server
->nfs_client
, res
);
585 static void update_changeattr(struct inode
*dir
, struct nfs4_change_info
*cinfo
)
587 struct nfs_inode
*nfsi
= NFS_I(dir
);
589 spin_lock(&dir
->i_lock
);
590 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
|NFS_INO_INVALID_DATA
;
591 if (!cinfo
->atomic
|| cinfo
->before
!= nfsi
->change_attr
)
592 nfs_force_lookup_revalidate(dir
);
593 nfsi
->change_attr
= cinfo
->after
;
594 spin_unlock(&dir
->i_lock
);
597 struct nfs4_opendata
{
599 struct nfs_openargs o_arg
;
600 struct nfs_openres o_res
;
601 struct nfs_open_confirmargs c_arg
;
602 struct nfs_open_confirmres c_res
;
603 struct nfs_fattr f_attr
;
604 struct nfs_fattr dir_attr
;
607 struct nfs4_state_owner
*owner
;
608 struct nfs4_state
*state
;
610 unsigned long timestamp
;
611 unsigned int rpc_done
: 1;
617 static void nfs4_init_opendata_res(struct nfs4_opendata
*p
)
619 p
->o_res
.f_attr
= &p
->f_attr
;
620 p
->o_res
.dir_attr
= &p
->dir_attr
;
621 p
->o_res
.seqid
= p
->o_arg
.seqid
;
622 p
->c_res
.seqid
= p
->c_arg
.seqid
;
623 p
->o_res
.server
= p
->o_arg
.server
;
624 nfs_fattr_init(&p
->f_attr
);
625 nfs_fattr_init(&p
->dir_attr
);
628 static struct nfs4_opendata
*nfs4_opendata_alloc(struct path
*path
,
629 struct nfs4_state_owner
*sp
, fmode_t fmode
, int flags
,
630 const struct iattr
*attrs
)
632 struct dentry
*parent
= dget_parent(path
->dentry
);
633 struct inode
*dir
= parent
->d_inode
;
634 struct nfs_server
*server
= NFS_SERVER(dir
);
635 struct nfs4_opendata
*p
;
637 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
640 p
->o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
641 if (p
->o_arg
.seqid
== NULL
)
643 p
->path
.mnt
= mntget(path
->mnt
);
644 p
->path
.dentry
= dget(path
->dentry
);
647 atomic_inc(&sp
->so_count
);
648 p
->o_arg
.fh
= NFS_FH(dir
);
649 p
->o_arg
.open_flags
= flags
;
650 p
->o_arg
.fmode
= fmode
& (FMODE_READ
|FMODE_WRITE
);
651 p
->o_arg
.clientid
= server
->nfs_client
->cl_clientid
;
652 p
->o_arg
.id
= sp
->so_owner_id
.id
;
653 p
->o_arg
.name
= &p
->path
.dentry
->d_name
;
654 p
->o_arg
.server
= server
;
655 p
->o_arg
.bitmask
= server
->attr_bitmask
;
656 p
->o_arg
.claim
= NFS4_OPEN_CLAIM_NULL
;
657 p
->o_res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
658 if (flags
& O_EXCL
) {
659 u32
*s
= (u32
*) p
->o_arg
.u
.verifier
.data
;
662 } else if (flags
& O_CREAT
) {
663 p
->o_arg
.u
.attrs
= &p
->attrs
;
664 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
666 p
->c_arg
.fh
= &p
->o_res
.fh
;
667 p
->c_arg
.stateid
= &p
->o_res
.stateid
;
668 p
->c_arg
.seqid
= p
->o_arg
.seqid
;
669 nfs4_init_opendata_res(p
);
679 static void nfs4_opendata_free(struct kref
*kref
)
681 struct nfs4_opendata
*p
= container_of(kref
,
682 struct nfs4_opendata
, kref
);
684 nfs_free_seqid(p
->o_arg
.seqid
);
685 if (p
->state
!= NULL
)
686 nfs4_put_open_state(p
->state
);
687 nfs4_put_state_owner(p
->owner
);
693 static void nfs4_opendata_put(struct nfs4_opendata
*p
)
696 kref_put(&p
->kref
, nfs4_opendata_free
);
699 static int nfs4_wait_for_completion_rpc_task(struct rpc_task
*task
)
703 ret
= rpc_wait_for_completion_task(task
);
707 static int can_open_cached(struct nfs4_state
*state
, fmode_t mode
, int open_mode
)
711 if (open_mode
& O_EXCL
)
713 switch (mode
& (FMODE_READ
|FMODE_WRITE
)) {
715 ret
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0;
718 ret
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0;
720 case FMODE_READ
|FMODE_WRITE
:
721 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0;
727 static int can_open_delegated(struct nfs_delegation
*delegation
, fmode_t fmode
)
729 if ((delegation
->type
& fmode
) != fmode
)
731 if (test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
))
733 nfs_mark_delegation_referenced(delegation
);
737 static void update_open_stateflags(struct nfs4_state
*state
, fmode_t fmode
)
746 case FMODE_READ
|FMODE_WRITE
:
749 nfs4_state_set_mode_locked(state
, state
->state
| fmode
);
752 static void nfs_set_open_stateid_locked(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
754 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
755 memcpy(state
->stateid
.data
, stateid
->data
, sizeof(state
->stateid
.data
));
756 memcpy(state
->open_stateid
.data
, stateid
->data
, sizeof(state
->open_stateid
.data
));
759 set_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
762 set_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
764 case FMODE_READ
|FMODE_WRITE
:
765 set_bit(NFS_O_RDWR_STATE
, &state
->flags
);
769 static void nfs_set_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
771 write_seqlock(&state
->seqlock
);
772 nfs_set_open_stateid_locked(state
, stateid
, fmode
);
773 write_sequnlock(&state
->seqlock
);
776 static void __update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, const nfs4_stateid
*deleg_stateid
, fmode_t fmode
)
779 * Protect the call to nfs4_state_set_mode_locked and
780 * serialise the stateid update
782 write_seqlock(&state
->seqlock
);
783 if (deleg_stateid
!= NULL
) {
784 memcpy(state
->stateid
.data
, deleg_stateid
->data
, sizeof(state
->stateid
.data
));
785 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
787 if (open_stateid
!= NULL
)
788 nfs_set_open_stateid_locked(state
, open_stateid
, fmode
);
789 write_sequnlock(&state
->seqlock
);
790 spin_lock(&state
->owner
->so_lock
);
791 update_open_stateflags(state
, fmode
);
792 spin_unlock(&state
->owner
->so_lock
);
795 static int update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, nfs4_stateid
*delegation
, fmode_t fmode
)
797 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
798 struct nfs_delegation
*deleg_cur
;
801 fmode
&= (FMODE_READ
|FMODE_WRITE
);
804 deleg_cur
= rcu_dereference(nfsi
->delegation
);
805 if (deleg_cur
== NULL
)
808 spin_lock(&deleg_cur
->lock
);
809 if (nfsi
->delegation
!= deleg_cur
||
810 (deleg_cur
->type
& fmode
) != fmode
)
811 goto no_delegation_unlock
;
813 if (delegation
== NULL
)
814 delegation
= &deleg_cur
->stateid
;
815 else if (memcmp(deleg_cur
->stateid
.data
, delegation
->data
, NFS4_STATEID_SIZE
) != 0)
816 goto no_delegation_unlock
;
818 nfs_mark_delegation_referenced(deleg_cur
);
819 __update_open_stateid(state
, open_stateid
, &deleg_cur
->stateid
, fmode
);
821 no_delegation_unlock
:
822 spin_unlock(&deleg_cur
->lock
);
826 if (!ret
&& open_stateid
!= NULL
) {
827 __update_open_stateid(state
, open_stateid
, NULL
, fmode
);
835 static void nfs4_return_incompatible_delegation(struct inode
*inode
, fmode_t fmode
)
837 struct nfs_delegation
*delegation
;
840 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
841 if (delegation
== NULL
|| (delegation
->type
& fmode
) == fmode
) {
846 nfs_inode_return_delegation(inode
);
849 static struct nfs4_state
*nfs4_try_open_cached(struct nfs4_opendata
*opendata
)
851 struct nfs4_state
*state
= opendata
->state
;
852 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
853 struct nfs_delegation
*delegation
;
854 int open_mode
= opendata
->o_arg
.open_flags
& O_EXCL
;
855 fmode_t fmode
= opendata
->o_arg
.fmode
;
856 nfs4_stateid stateid
;
860 if (can_open_cached(state
, fmode
, open_mode
)) {
861 spin_lock(&state
->owner
->so_lock
);
862 if (can_open_cached(state
, fmode
, open_mode
)) {
863 update_open_stateflags(state
, fmode
);
864 spin_unlock(&state
->owner
->so_lock
);
865 goto out_return_state
;
867 spin_unlock(&state
->owner
->so_lock
);
870 delegation
= rcu_dereference(nfsi
->delegation
);
871 if (delegation
== NULL
||
872 !can_open_delegated(delegation
, fmode
)) {
876 /* Save the delegation */
877 memcpy(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
));
879 ret
= nfs_may_open(state
->inode
, state
->owner
->so_cred
, open_mode
);
884 /* Try to update the stateid using the delegation */
885 if (update_open_stateid(state
, NULL
, &stateid
, fmode
))
886 goto out_return_state
;
891 atomic_inc(&state
->count
);
895 static struct nfs4_state
*nfs4_opendata_to_nfs4_state(struct nfs4_opendata
*data
)
898 struct nfs4_state
*state
= NULL
;
899 struct nfs_delegation
*delegation
;
902 if (!data
->rpc_done
) {
903 state
= nfs4_try_open_cached(data
);
908 if (!(data
->f_attr
.valid
& NFS_ATTR_FATTR
))
910 inode
= nfs_fhget(data
->dir
->d_sb
, &data
->o_res
.fh
, &data
->f_attr
);
911 ret
= PTR_ERR(inode
);
915 state
= nfs4_get_open_state(inode
, data
->owner
);
918 if (data
->o_res
.delegation_type
!= 0) {
919 int delegation_flags
= 0;
922 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
924 delegation_flags
= delegation
->flags
;
926 if ((delegation_flags
& 1UL<<NFS_DELEGATION_NEED_RECLAIM
) == 0)
927 nfs_inode_set_delegation(state
->inode
,
928 data
->owner
->so_cred
,
931 nfs_inode_reclaim_delegation(state
->inode
,
932 data
->owner
->so_cred
,
936 update_open_stateid(state
, &data
->o_res
.stateid
, NULL
,
947 static struct nfs_open_context
*nfs4_state_find_open_context(struct nfs4_state
*state
)
949 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
950 struct nfs_open_context
*ctx
;
952 spin_lock(&state
->inode
->i_lock
);
953 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
954 if (ctx
->state
!= state
)
956 get_nfs_open_context(ctx
);
957 spin_unlock(&state
->inode
->i_lock
);
960 spin_unlock(&state
->inode
->i_lock
);
961 return ERR_PTR(-ENOENT
);
964 static struct nfs4_opendata
*nfs4_open_recoverdata_alloc(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
966 struct nfs4_opendata
*opendata
;
968 opendata
= nfs4_opendata_alloc(&ctx
->path
, state
->owner
, 0, 0, NULL
);
969 if (opendata
== NULL
)
970 return ERR_PTR(-ENOMEM
);
971 opendata
->state
= state
;
972 atomic_inc(&state
->count
);
976 static int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, fmode_t fmode
, struct nfs4_state
**res
)
978 struct nfs4_state
*newstate
;
981 opendata
->o_arg
.open_flags
= 0;
982 opendata
->o_arg
.fmode
= fmode
;
983 memset(&opendata
->o_res
, 0, sizeof(opendata
->o_res
));
984 memset(&opendata
->c_res
, 0, sizeof(opendata
->c_res
));
985 nfs4_init_opendata_res(opendata
);
986 ret
= _nfs4_proc_open(opendata
);
989 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
990 if (IS_ERR(newstate
))
991 return PTR_ERR(newstate
);
992 nfs4_close_state(&opendata
->path
, newstate
, fmode
);
997 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
999 struct nfs4_state
*newstate
;
1002 /* memory barrier prior to reading state->n_* */
1003 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
1005 if (state
->n_rdwr
!= 0) {
1006 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &newstate
);
1009 if (newstate
!= state
)
1012 if (state
->n_wronly
!= 0) {
1013 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &newstate
);
1016 if (newstate
!= state
)
1019 if (state
->n_rdonly
!= 0) {
1020 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &newstate
);
1023 if (newstate
!= state
)
1027 * We may have performed cached opens for all three recoveries.
1028 * Check if we need to update the current stateid.
1030 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0 &&
1031 memcmp(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
)) != 0) {
1032 write_seqlock(&state
->seqlock
);
1033 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
1034 memcpy(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
));
1035 write_sequnlock(&state
->seqlock
);
1042 * reclaim state on the server after a reboot.
1044 static int _nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1046 struct nfs_delegation
*delegation
;
1047 struct nfs4_opendata
*opendata
;
1048 fmode_t delegation_type
= 0;
1051 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1052 if (IS_ERR(opendata
))
1053 return PTR_ERR(opendata
);
1054 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
1055 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
1057 delegation
= rcu_dereference(NFS_I(state
->inode
)->delegation
);
1058 if (delegation
!= NULL
&& test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) != 0)
1059 delegation_type
= delegation
->type
;
1061 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
1062 status
= nfs4_open_recover(opendata
, state
);
1063 nfs4_opendata_put(opendata
);
1067 static int nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1069 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1070 struct nfs4_exception exception
= { };
1073 err
= _nfs4_do_open_reclaim(ctx
, state
);
1074 if (err
!= -NFS4ERR_DELAY
)
1076 nfs4_handle_exception(server
, err
, &exception
);
1077 } while (exception
.retry
);
1081 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1083 struct nfs_open_context
*ctx
;
1086 ctx
= nfs4_state_find_open_context(state
);
1088 return PTR_ERR(ctx
);
1089 ret
= nfs4_do_open_reclaim(ctx
, state
);
1090 put_nfs_open_context(ctx
);
1094 static int _nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
1096 struct nfs4_opendata
*opendata
;
1099 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1100 if (IS_ERR(opendata
))
1101 return PTR_ERR(opendata
);
1102 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
1103 memcpy(opendata
->o_arg
.u
.delegation
.data
, stateid
->data
,
1104 sizeof(opendata
->o_arg
.u
.delegation
.data
));
1105 ret
= nfs4_open_recover(opendata
, state
);
1106 nfs4_opendata_put(opendata
);
1110 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
1112 struct nfs4_exception exception
= { };
1113 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1116 err
= _nfs4_open_delegation_recall(ctx
, state
, stateid
);
1120 case -NFS4ERR_STALE_CLIENTID
:
1121 case -NFS4ERR_STALE_STATEID
:
1122 case -NFS4ERR_EXPIRED
:
1123 /* Don't recall a delegation if it was lost */
1124 nfs4_schedule_state_recovery(server
->nfs_client
);
1127 err
= nfs4_handle_exception(server
, err
, &exception
);
1128 } while (exception
.retry
);
1132 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
1134 struct nfs4_opendata
*data
= calldata
;
1136 data
->rpc_status
= task
->tk_status
;
1137 if (RPC_ASSASSINATED(task
))
1139 if (data
->rpc_status
== 0) {
1140 memcpy(data
->o_res
.stateid
.data
, data
->c_res
.stateid
.data
,
1141 sizeof(data
->o_res
.stateid
.data
));
1142 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
1143 renew_lease(data
->o_res
.server
, data
->timestamp
);
1148 static void nfs4_open_confirm_release(void *calldata
)
1150 struct nfs4_opendata
*data
= calldata
;
1151 struct nfs4_state
*state
= NULL
;
1153 /* If this request hasn't been cancelled, do nothing */
1154 if (data
->cancelled
== 0)
1156 /* In case of error, no cleanup! */
1157 if (!data
->rpc_done
)
1159 state
= nfs4_opendata_to_nfs4_state(data
);
1161 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
1163 nfs4_opendata_put(data
);
1166 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
1167 .rpc_call_done
= nfs4_open_confirm_done
,
1168 .rpc_release
= nfs4_open_confirm_release
,
1172 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1174 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
1176 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
1177 struct rpc_task
*task
;
1178 struct rpc_message msg
= {
1179 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
1180 .rpc_argp
= &data
->c_arg
,
1181 .rpc_resp
= &data
->c_res
,
1182 .rpc_cred
= data
->owner
->so_cred
,
1184 struct rpc_task_setup task_setup_data
= {
1185 .rpc_client
= server
->client
,
1186 .rpc_message
= &msg
,
1187 .callback_ops
= &nfs4_open_confirm_ops
,
1188 .callback_data
= data
,
1189 .workqueue
= nfsiod_workqueue
,
1190 .flags
= RPC_TASK_ASYNC
,
1194 kref_get(&data
->kref
);
1196 data
->rpc_status
= 0;
1197 data
->timestamp
= jiffies
;
1198 task
= rpc_run_task(&task_setup_data
);
1200 return PTR_ERR(task
);
1201 status
= nfs4_wait_for_completion_rpc_task(task
);
1203 data
->cancelled
= 1;
1206 status
= data
->rpc_status
;
1211 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
1213 struct nfs4_opendata
*data
= calldata
;
1214 struct nfs4_state_owner
*sp
= data
->owner
;
1216 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
1219 * Check if we still need to send an OPEN call, or if we can use
1220 * a delegation instead.
1222 if (data
->state
!= NULL
) {
1223 struct nfs_delegation
*delegation
;
1225 if (can_open_cached(data
->state
, data
->o_arg
.fmode
, data
->o_arg
.open_flags
))
1228 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
1229 if (delegation
!= NULL
&&
1230 test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) == 0) {
1236 /* Update sequence id. */
1237 data
->o_arg
.id
= sp
->so_owner_id
.id
;
1238 data
->o_arg
.clientid
= sp
->so_client
->cl_clientid
;
1239 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
) {
1240 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
1241 nfs_copy_fh(&data
->o_res
.fh
, data
->o_arg
.fh
);
1243 data
->timestamp
= jiffies
;
1244 rpc_call_start(task
);
1247 task
->tk_action
= NULL
;
1251 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
1253 struct nfs4_opendata
*data
= calldata
;
1255 data
->rpc_status
= task
->tk_status
;
1256 if (RPC_ASSASSINATED(task
))
1258 if (task
->tk_status
== 0) {
1259 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
1263 data
->rpc_status
= -ELOOP
;
1266 data
->rpc_status
= -EISDIR
;
1269 data
->rpc_status
= -ENOTDIR
;
1271 renew_lease(data
->o_res
.server
, data
->timestamp
);
1272 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
1273 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
1278 static void nfs4_open_release(void *calldata
)
1280 struct nfs4_opendata
*data
= calldata
;
1281 struct nfs4_state
*state
= NULL
;
1283 /* If this request hasn't been cancelled, do nothing */
1284 if (data
->cancelled
== 0)
1286 /* In case of error, no cleanup! */
1287 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
1289 /* In case we need an open_confirm, no cleanup! */
1290 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
1292 state
= nfs4_opendata_to_nfs4_state(data
);
1294 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
1296 nfs4_opendata_put(data
);
1299 static const struct rpc_call_ops nfs4_open_ops
= {
1300 .rpc_call_prepare
= nfs4_open_prepare
,
1301 .rpc_call_done
= nfs4_open_done
,
1302 .rpc_release
= nfs4_open_release
,
1306 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1308 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
1310 struct inode
*dir
= data
->dir
->d_inode
;
1311 struct nfs_server
*server
= NFS_SERVER(dir
);
1312 struct nfs_openargs
*o_arg
= &data
->o_arg
;
1313 struct nfs_openres
*o_res
= &data
->o_res
;
1314 struct rpc_task
*task
;
1315 struct rpc_message msg
= {
1316 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
1319 .rpc_cred
= data
->owner
->so_cred
,
1321 struct rpc_task_setup task_setup_data
= {
1322 .rpc_client
= server
->client
,
1323 .rpc_message
= &msg
,
1324 .callback_ops
= &nfs4_open_ops
,
1325 .callback_data
= data
,
1326 .workqueue
= nfsiod_workqueue
,
1327 .flags
= RPC_TASK_ASYNC
,
1331 kref_get(&data
->kref
);
1333 data
->rpc_status
= 0;
1334 data
->cancelled
= 0;
1335 task
= rpc_run_task(&task_setup_data
);
1337 return PTR_ERR(task
);
1338 status
= nfs4_wait_for_completion_rpc_task(task
);
1340 data
->cancelled
= 1;
1343 status
= data
->rpc_status
;
1345 if (status
!= 0 || !data
->rpc_done
)
1348 if (o_res
->fh
.size
== 0)
1349 _nfs4_proc_lookup(dir
, o_arg
->name
, &o_res
->fh
, o_res
->f_attr
);
1351 if (o_arg
->open_flags
& O_CREAT
) {
1352 update_changeattr(dir
, &o_res
->cinfo
);
1353 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
1355 nfs_refresh_inode(dir
, o_res
->dir_attr
);
1356 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1357 status
= _nfs4_proc_open_confirm(data
);
1361 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
1362 _nfs4_proc_getattr(server
, &o_res
->fh
, o_res
->f_attr
);
1366 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
1368 struct nfs_client
*clp
= server
->nfs_client
;
1372 ret
= nfs4_wait_clnt_recover(clp
);
1375 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
1376 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
1378 nfs4_schedule_state_recovery(clp
);
1385 * reclaim state on the server after a network partition.
1386 * Assumes caller holds the appropriate lock
1388 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1390 struct nfs4_opendata
*opendata
;
1393 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1394 if (IS_ERR(opendata
))
1395 return PTR_ERR(opendata
);
1396 ret
= nfs4_open_recover(opendata
, state
);
1398 d_drop(ctx
->path
.dentry
);
1399 nfs4_opendata_put(opendata
);
1403 static inline int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1405 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1406 struct nfs4_exception exception
= { };
1410 err
= _nfs4_open_expired(ctx
, state
);
1411 if (err
!= -NFS4ERR_DELAY
)
1413 nfs4_handle_exception(server
, err
, &exception
);
1414 } while (exception
.retry
);
1418 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1420 struct nfs_open_context
*ctx
;
1423 ctx
= nfs4_state_find_open_context(state
);
1425 return PTR_ERR(ctx
);
1426 ret
= nfs4_do_open_expired(ctx
, state
);
1427 put_nfs_open_context(ctx
);
1432 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1433 * fields corresponding to attributes that were used to store the verifier.
1434 * Make sure we clobber those fields in the later setattr call
1436 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1438 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1439 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1440 sattr
->ia_valid
|= ATTR_ATIME
;
1442 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1443 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1444 sattr
->ia_valid
|= ATTR_MTIME
;
1448 * Returns a referenced nfs4_state
1450 static int _nfs4_do_open(struct inode
*dir
, struct path
*path
, fmode_t fmode
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
1452 struct nfs4_state_owner
*sp
;
1453 struct nfs4_state
*state
= NULL
;
1454 struct nfs_server
*server
= NFS_SERVER(dir
);
1455 struct nfs4_opendata
*opendata
;
1458 /* Protect against reboot recovery conflicts */
1460 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1461 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1464 status
= nfs4_recover_expired_lease(server
);
1466 goto err_put_state_owner
;
1467 if (path
->dentry
->d_inode
!= NULL
)
1468 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, fmode
);
1470 opendata
= nfs4_opendata_alloc(path
, sp
, fmode
, flags
, sattr
);
1471 if (opendata
== NULL
)
1472 goto err_put_state_owner
;
1474 if (path
->dentry
->d_inode
!= NULL
)
1475 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1477 status
= _nfs4_proc_open(opendata
);
1479 goto err_opendata_put
;
1481 if (opendata
->o_arg
.open_flags
& O_EXCL
)
1482 nfs4_exclusive_attrset(opendata
, sattr
);
1484 state
= nfs4_opendata_to_nfs4_state(opendata
);
1485 status
= PTR_ERR(state
);
1487 goto err_opendata_put
;
1488 nfs4_opendata_put(opendata
);
1489 nfs4_put_state_owner(sp
);
1493 nfs4_opendata_put(opendata
);
1494 err_put_state_owner
:
1495 nfs4_put_state_owner(sp
);
1502 static struct nfs4_state
*nfs4_do_open(struct inode
*dir
, struct path
*path
, fmode_t fmode
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
)
1504 struct nfs4_exception exception
= { };
1505 struct nfs4_state
*res
;
1509 status
= _nfs4_do_open(dir
, path
, fmode
, flags
, sattr
, cred
, &res
);
1512 /* NOTE: BAD_SEQID means the server and client disagree about the
1513 * book-keeping w.r.t. state-changing operations
1514 * (OPEN/CLOSE/LOCK/LOCKU...)
1515 * It is actually a sign of a bug on the client or on the server.
1517 * If we receive a BAD_SEQID error in the particular case of
1518 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1519 * have unhashed the old state_owner for us, and that we can
1520 * therefore safely retry using a new one. We should still warn
1521 * the user though...
1523 if (status
== -NFS4ERR_BAD_SEQID
) {
1524 printk(KERN_WARNING
"NFS: v4 server %s "
1525 " returned a bad sequence-id error!\n",
1526 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1527 exception
.retry
= 1;
1531 * BAD_STATEID on OPEN means that the server cancelled our
1532 * state before it received the OPEN_CONFIRM.
1533 * Recover by retrying the request as per the discussion
1534 * on Page 181 of RFC3530.
1536 if (status
== -NFS4ERR_BAD_STATEID
) {
1537 exception
.retry
= 1;
1540 if (status
== -EAGAIN
) {
1541 /* We must have found a delegation */
1542 exception
.retry
= 1;
1545 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1546 status
, &exception
));
1547 } while (exception
.retry
);
1551 static int _nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1552 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1553 struct nfs4_state
*state
)
1555 struct nfs_server
*server
= NFS_SERVER(inode
);
1556 struct nfs_setattrargs arg
= {
1557 .fh
= NFS_FH(inode
),
1560 .bitmask
= server
->attr_bitmask
,
1562 struct nfs_setattrres res
= {
1566 struct rpc_message msg
= {
1567 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1572 unsigned long timestamp
= jiffies
;
1575 nfs_fattr_init(fattr
);
1577 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1578 /* Use that stateid */
1579 } else if (state
!= NULL
) {
1580 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1582 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1584 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
1585 if (status
== 0 && state
!= NULL
)
1586 renew_lease(server
, timestamp
);
1590 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1591 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1592 struct nfs4_state
*state
)
1594 struct nfs_server
*server
= NFS_SERVER(inode
);
1595 struct nfs4_exception exception
= { };
1598 err
= nfs4_handle_exception(server
,
1599 _nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
),
1601 } while (exception
.retry
);
1605 struct nfs4_closedata
{
1607 struct inode
*inode
;
1608 struct nfs4_state
*state
;
1609 struct nfs_closeargs arg
;
1610 struct nfs_closeres res
;
1611 struct nfs_fattr fattr
;
1612 unsigned long timestamp
;
1615 static void nfs4_free_closedata(void *data
)
1617 struct nfs4_closedata
*calldata
= data
;
1618 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1620 nfs4_put_open_state(calldata
->state
);
1621 nfs_free_seqid(calldata
->arg
.seqid
);
1622 nfs4_put_state_owner(sp
);
1623 path_put(&calldata
->path
);
1627 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1629 struct nfs4_closedata
*calldata
= data
;
1630 struct nfs4_state
*state
= calldata
->state
;
1631 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1633 if (RPC_ASSASSINATED(task
))
1635 /* hmm. we are done with the inode, and in the process of freeing
1636 * the state_owner. we keep this around to process errors
1638 switch (task
->tk_status
) {
1640 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, 0);
1641 renew_lease(server
, calldata
->timestamp
);
1643 case -NFS4ERR_STALE_STATEID
:
1644 case -NFS4ERR_OLD_STATEID
:
1645 case -NFS4ERR_BAD_STATEID
:
1646 case -NFS4ERR_EXPIRED
:
1647 if (calldata
->arg
.fmode
== 0)
1650 if (nfs4_async_handle_error(task
, server
, state
) == -EAGAIN
) {
1651 rpc_restart_call(task
);
1655 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1658 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1660 struct nfs4_closedata
*calldata
= data
;
1661 struct nfs4_state
*state
= calldata
->state
;
1662 int clear_rd
, clear_wr
, clear_rdwr
;
1664 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1667 clear_rd
= clear_wr
= clear_rdwr
= 0;
1668 spin_lock(&state
->owner
->so_lock
);
1669 /* Calculate the change in open mode */
1670 if (state
->n_rdwr
== 0) {
1671 if (state
->n_rdonly
== 0) {
1672 clear_rd
|= test_and_clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1673 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1675 if (state
->n_wronly
== 0) {
1676 clear_wr
|= test_and_clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1677 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1680 spin_unlock(&state
->owner
->so_lock
);
1681 if (!clear_rd
&& !clear_wr
&& !clear_rdwr
) {
1682 /* Note: exit _without_ calling nfs4_close_done */
1683 task
->tk_action
= NULL
;
1686 nfs_fattr_init(calldata
->res
.fattr
);
1687 if (test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0) {
1688 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1689 calldata
->arg
.fmode
= FMODE_READ
;
1690 } else if (test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0) {
1691 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1692 calldata
->arg
.fmode
= FMODE_WRITE
;
1694 calldata
->timestamp
= jiffies
;
1695 rpc_call_start(task
);
1698 static const struct rpc_call_ops nfs4_close_ops
= {
1699 .rpc_call_prepare
= nfs4_close_prepare
,
1700 .rpc_call_done
= nfs4_close_done
,
1701 .rpc_release
= nfs4_free_closedata
,
1705 * It is possible for data to be read/written from a mem-mapped file
1706 * after the sys_close call (which hits the vfs layer as a flush).
1707 * This means that we can't safely call nfsv4 close on a file until
1708 * the inode is cleared. This in turn means that we are not good
1709 * NFSv4 citizens - we do not indicate to the server to update the file's
1710 * share state even when we are done with one of the three share
1711 * stateid's in the inode.
1713 * NOTE: Caller must be holding the sp->so_owner semaphore!
1715 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
, int wait
)
1717 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1718 struct nfs4_closedata
*calldata
;
1719 struct nfs4_state_owner
*sp
= state
->owner
;
1720 struct rpc_task
*task
;
1721 struct rpc_message msg
= {
1722 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1723 .rpc_cred
= state
->owner
->so_cred
,
1725 struct rpc_task_setup task_setup_data
= {
1726 .rpc_client
= server
->client
,
1727 .rpc_message
= &msg
,
1728 .callback_ops
= &nfs4_close_ops
,
1729 .workqueue
= nfsiod_workqueue
,
1730 .flags
= RPC_TASK_ASYNC
,
1732 int status
= -ENOMEM
;
1734 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
1735 if (calldata
== NULL
)
1737 calldata
->inode
= state
->inode
;
1738 calldata
->state
= state
;
1739 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1740 calldata
->arg
.stateid
= &state
->open_stateid
;
1741 /* Serialization for the sequence id */
1742 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
1743 if (calldata
->arg
.seqid
== NULL
)
1744 goto out_free_calldata
;
1745 calldata
->arg
.fmode
= 0;
1746 calldata
->arg
.bitmask
= server
->cache_consistency_bitmask
;
1747 calldata
->res
.fattr
= &calldata
->fattr
;
1748 calldata
->res
.seqid
= calldata
->arg
.seqid
;
1749 calldata
->res
.server
= server
;
1750 calldata
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
1751 calldata
->path
.mnt
= mntget(path
->mnt
);
1752 calldata
->path
.dentry
= dget(path
->dentry
);
1754 msg
.rpc_argp
= &calldata
->arg
,
1755 msg
.rpc_resp
= &calldata
->res
,
1756 task_setup_data
.callback_data
= calldata
;
1757 task
= rpc_run_task(&task_setup_data
);
1759 return PTR_ERR(task
);
1762 status
= rpc_wait_for_completion_task(task
);
1768 nfs4_put_open_state(state
);
1769 nfs4_put_state_owner(sp
);
1773 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
, fmode_t fmode
)
1778 /* If the open_intent is for execute, we have an extra check to make */
1779 if (fmode
& FMODE_EXEC
) {
1780 ret
= nfs_may_open(state
->inode
,
1781 state
->owner
->so_cred
,
1782 nd
->intent
.open
.flags
);
1786 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
1787 if (!IS_ERR(filp
)) {
1788 struct nfs_open_context
*ctx
;
1789 ctx
= nfs_file_open_context(filp
);
1793 ret
= PTR_ERR(filp
);
1795 nfs4_close_sync(path
, state
, fmode
& (FMODE_READ
|FMODE_WRITE
));
1800 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
1802 struct path path
= {
1803 .mnt
= nd
->path
.mnt
,
1806 struct dentry
*parent
;
1808 struct rpc_cred
*cred
;
1809 struct nfs4_state
*state
;
1811 fmode_t fmode
= nd
->intent
.open
.flags
& (FMODE_READ
| FMODE_WRITE
| FMODE_EXEC
);
1813 if (nd
->flags
& LOOKUP_CREATE
) {
1814 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
1815 attr
.ia_valid
= ATTR_MODE
;
1816 if (!IS_POSIXACL(dir
))
1817 attr
.ia_mode
&= ~current_umask();
1820 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
1823 cred
= rpc_lookup_cred();
1825 return (struct dentry
*)cred
;
1826 parent
= dentry
->d_parent
;
1827 /* Protect against concurrent sillydeletes */
1828 nfs_block_sillyrename(parent
);
1829 state
= nfs4_do_open(dir
, &path
, fmode
, nd
->intent
.open
.flags
, &attr
, cred
);
1831 if (IS_ERR(state
)) {
1832 if (PTR_ERR(state
) == -ENOENT
) {
1833 d_add(dentry
, NULL
);
1834 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1836 nfs_unblock_sillyrename(parent
);
1837 return (struct dentry
*)state
;
1839 res
= d_add_unique(dentry
, igrab(state
->inode
));
1842 nfs_set_verifier(path
.dentry
, nfs_save_change_attribute(dir
));
1843 nfs_unblock_sillyrename(parent
);
1844 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
1849 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
1851 struct path path
= {
1852 .mnt
= nd
->path
.mnt
,
1855 struct rpc_cred
*cred
;
1856 struct nfs4_state
*state
;
1857 fmode_t fmode
= openflags
& (FMODE_READ
| FMODE_WRITE
);
1859 cred
= rpc_lookup_cred();
1861 return PTR_ERR(cred
);
1862 state
= nfs4_do_open(dir
, &path
, fmode
, openflags
, NULL
, cred
);
1864 if (IS_ERR(state
)) {
1865 switch (PTR_ERR(state
)) {
1871 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
1877 if (state
->inode
== dentry
->d_inode
) {
1878 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1879 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
1882 nfs4_close_sync(&path
, state
, fmode
);
1888 void nfs4_close_context(struct nfs_open_context
*ctx
, int is_sync
)
1890 if (ctx
->state
== NULL
)
1893 nfs4_close_sync(&ctx
->path
, ctx
->state
, ctx
->mode
);
1895 nfs4_close_state(&ctx
->path
, ctx
->state
, ctx
->mode
);
1898 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1900 struct nfs4_server_caps_arg args
= {
1903 struct nfs4_server_caps_res res
= {};
1904 struct rpc_message msg
= {
1905 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
1911 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
1913 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
1914 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
1915 server
->caps
|= NFS_CAP_ACLS
;
1916 if (res
.has_links
!= 0)
1917 server
->caps
|= NFS_CAP_HARDLINKS
;
1918 if (res
.has_symlinks
!= 0)
1919 server
->caps
|= NFS_CAP_SYMLINKS
;
1920 memcpy(server
->cache_consistency_bitmask
, res
.attr_bitmask
, sizeof(server
->cache_consistency_bitmask
));
1921 server
->cache_consistency_bitmask
[0] &= FATTR4_WORD0_CHANGE
|FATTR4_WORD0_SIZE
;
1922 server
->cache_consistency_bitmask
[1] &= FATTR4_WORD1_TIME_METADATA
|FATTR4_WORD1_TIME_MODIFY
;
1923 server
->acl_bitmask
= res
.acl_bitmask
;
1929 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1931 struct nfs4_exception exception
= { };
1934 err
= nfs4_handle_exception(server
,
1935 _nfs4_server_capabilities(server
, fhandle
),
1937 } while (exception
.retry
);
1941 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1942 struct nfs_fsinfo
*info
)
1944 struct nfs4_lookup_root_arg args
= {
1945 .bitmask
= nfs4_fattr_bitmap
,
1947 struct nfs4_lookup_res res
= {
1949 .fattr
= info
->fattr
,
1952 struct rpc_message msg
= {
1953 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1957 nfs_fattr_init(info
->fattr
);
1958 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
1961 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1962 struct nfs_fsinfo
*info
)
1964 struct nfs4_exception exception
= { };
1967 err
= nfs4_handle_exception(server
,
1968 _nfs4_lookup_root(server
, fhandle
, info
),
1970 } while (exception
.retry
);
1975 * get the file handle for the "/" directory on the server
1977 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1978 struct nfs_fsinfo
*info
)
1982 status
= nfs4_lookup_root(server
, fhandle
, info
);
1984 status
= nfs4_server_capabilities(server
, fhandle
);
1986 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
1987 return nfs4_map_errors(status
);
1991 * Get locations and (maybe) other attributes of a referral.
1992 * Note that we'll actually follow the referral later when
1993 * we detect fsid mismatch in inode revalidation
1995 static int nfs4_get_referral(struct inode
*dir
, const struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
1997 int status
= -ENOMEM
;
1998 struct page
*page
= NULL
;
1999 struct nfs4_fs_locations
*locations
= NULL
;
2001 page
= alloc_page(GFP_KERNEL
);
2004 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
2005 if (locations
== NULL
)
2008 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
2011 /* Make sure server returned a different fsid for the referral */
2012 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
2013 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__
, name
->name
);
2018 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
2019 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
2021 fattr
->mode
= S_IFDIR
;
2022 memset(fhandle
, 0, sizeof(struct nfs_fh
));
2031 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2033 struct nfs4_getattr_arg args
= {
2035 .bitmask
= server
->attr_bitmask
,
2037 struct nfs4_getattr_res res
= {
2041 struct rpc_message msg
= {
2042 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
2047 nfs_fattr_init(fattr
);
2048 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2051 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2053 struct nfs4_exception exception
= { };
2056 err
= nfs4_handle_exception(server
,
2057 _nfs4_proc_getattr(server
, fhandle
, fattr
),
2059 } while (exception
.retry
);
2064 * The file is not closed if it is opened due to the a request to change
2065 * the size of the file. The open call will not be needed once the
2066 * VFS layer lookup-intents are implemented.
2068 * Close is called when the inode is destroyed.
2069 * If we haven't opened the file for O_WRONLY, we
2070 * need to in the size_change case to obtain a stateid.
2073 * Because OPEN is always done by name in nfsv4, it is
2074 * possible that we opened a different file by the same
2075 * name. We can recognize this race condition, but we
2076 * can't do anything about it besides returning an error.
2078 * This will be fixed with VFS changes (lookup-intent).
2081 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
2082 struct iattr
*sattr
)
2084 struct inode
*inode
= dentry
->d_inode
;
2085 struct rpc_cred
*cred
= NULL
;
2086 struct nfs4_state
*state
= NULL
;
2089 nfs_fattr_init(fattr
);
2091 /* Search for an existing open(O_WRITE) file */
2092 if (sattr
->ia_valid
& ATTR_FILE
) {
2093 struct nfs_open_context
*ctx
;
2095 ctx
= nfs_file_open_context(sattr
->ia_file
);
2102 status
= nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
);
2104 nfs_setattr_update_inode(inode
, sattr
);
2108 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, const struct nfs_fh
*dirfh
,
2109 const struct qstr
*name
, struct nfs_fh
*fhandle
,
2110 struct nfs_fattr
*fattr
)
2113 struct nfs4_lookup_arg args
= {
2114 .bitmask
= server
->attr_bitmask
,
2118 struct nfs4_lookup_res res
= {
2123 struct rpc_message msg
= {
2124 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
2129 nfs_fattr_init(fattr
);
2131 dprintk("NFS call lookupfh %s\n", name
->name
);
2132 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2133 dprintk("NFS reply lookupfh: %d\n", status
);
2137 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
2138 struct qstr
*name
, struct nfs_fh
*fhandle
,
2139 struct nfs_fattr
*fattr
)
2141 struct nfs4_exception exception
= { };
2144 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
2146 if (err
== -NFS4ERR_MOVED
) {
2150 err
= nfs4_handle_exception(server
, err
, &exception
);
2151 } while (exception
.retry
);
2155 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
,
2156 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2160 dprintk("NFS call lookup %s\n", name
->name
);
2161 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
2162 if (status
== -NFS4ERR_MOVED
)
2163 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
2164 dprintk("NFS reply lookup: %d\n", status
);
2168 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
2170 struct nfs4_exception exception
= { };
2173 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2174 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
2176 } while (exception
.retry
);
2180 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
2182 struct nfs_server
*server
= NFS_SERVER(inode
);
2183 struct nfs_fattr fattr
;
2184 struct nfs4_accessargs args
= {
2185 .fh
= NFS_FH(inode
),
2186 .bitmask
= server
->attr_bitmask
,
2188 struct nfs4_accessres res
= {
2192 struct rpc_message msg
= {
2193 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
2196 .rpc_cred
= entry
->cred
,
2198 int mode
= entry
->mask
;
2202 * Determine which access bits we want to ask for...
2204 if (mode
& MAY_READ
)
2205 args
.access
|= NFS4_ACCESS_READ
;
2206 if (S_ISDIR(inode
->i_mode
)) {
2207 if (mode
& MAY_WRITE
)
2208 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
2209 if (mode
& MAY_EXEC
)
2210 args
.access
|= NFS4_ACCESS_LOOKUP
;
2212 if (mode
& MAY_WRITE
)
2213 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
2214 if (mode
& MAY_EXEC
)
2215 args
.access
|= NFS4_ACCESS_EXECUTE
;
2217 nfs_fattr_init(&fattr
);
2218 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2221 if (res
.access
& NFS4_ACCESS_READ
)
2222 entry
->mask
|= MAY_READ
;
2223 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
2224 entry
->mask
|= MAY_WRITE
;
2225 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
2226 entry
->mask
|= MAY_EXEC
;
2227 nfs_refresh_inode(inode
, &fattr
);
2232 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
2234 struct nfs4_exception exception
= { };
2237 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2238 _nfs4_proc_access(inode
, entry
),
2240 } while (exception
.retry
);
2245 * TODO: For the time being, we don't try to get any attributes
2246 * along with any of the zero-copy operations READ, READDIR,
2249 * In the case of the first three, we want to put the GETATTR
2250 * after the read-type operation -- this is because it is hard
2251 * to predict the length of a GETATTR response in v4, and thus
2252 * align the READ data correctly. This means that the GETATTR
2253 * may end up partially falling into the page cache, and we should
2254 * shift it into the 'tail' of the xdr_buf before processing.
2255 * To do this efficiently, we need to know the total length
2256 * of data received, which doesn't seem to be available outside
2259 * In the case of WRITE, we also want to put the GETATTR after
2260 * the operation -- in this case because we want to make sure
2261 * we get the post-operation mtime and size. This means that
2262 * we can't use xdr_encode_pages() as written: we need a variant
2263 * of it which would leave room in the 'tail' iovec.
2265 * Both of these changes to the XDR layer would in fact be quite
2266 * minor, but I decided to leave them for a subsequent patch.
2268 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2269 unsigned int pgbase
, unsigned int pglen
)
2271 struct nfs4_readlink args
= {
2272 .fh
= NFS_FH(inode
),
2277 struct nfs4_readlink_res res
;
2278 struct rpc_message msg
= {
2279 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
2284 return nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
2287 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2288 unsigned int pgbase
, unsigned int pglen
)
2290 struct nfs4_exception exception
= { };
2293 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2294 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
2296 } while (exception
.retry
);
2302 * We will need to arrange for the VFS layer to provide an atomic open.
2303 * Until then, this create/open method is prone to inefficiency and race
2304 * conditions due to the lookup, create, and open VFS calls from sys_open()
2305 * placed on the wire.
2307 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2308 * The file will be opened again in the subsequent VFS open call
2309 * (nfs4_proc_file_open).
2311 * The open for read will just hang around to be used by any process that
2312 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2316 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
2317 int flags
, struct nameidata
*nd
)
2319 struct path path
= {
2320 .mnt
= nd
->path
.mnt
,
2323 struct nfs4_state
*state
;
2324 struct rpc_cred
*cred
;
2325 fmode_t fmode
= flags
& (FMODE_READ
| FMODE_WRITE
);
2328 cred
= rpc_lookup_cred();
2330 status
= PTR_ERR(cred
);
2333 state
= nfs4_do_open(dir
, &path
, fmode
, flags
, sattr
, cred
);
2335 if (IS_ERR(state
)) {
2336 status
= PTR_ERR(state
);
2339 d_add(dentry
, igrab(state
->inode
));
2340 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2341 if (flags
& O_EXCL
) {
2342 struct nfs_fattr fattr
;
2343 status
= nfs4_do_setattr(state
->inode
, cred
, &fattr
, sattr
, state
);
2345 nfs_setattr_update_inode(state
->inode
, sattr
);
2346 nfs_post_op_update_inode(state
->inode
, &fattr
);
2348 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
2349 status
= nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2351 nfs4_close_sync(&path
, state
, fmode
);
2358 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2360 struct nfs_server
*server
= NFS_SERVER(dir
);
2361 struct nfs_removeargs args
= {
2363 .name
.len
= name
->len
,
2364 .name
.name
= name
->name
,
2365 .bitmask
= server
->attr_bitmask
,
2367 struct nfs_removeres res
= {
2370 struct rpc_message msg
= {
2371 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
2377 nfs_fattr_init(&res
.dir_attr
);
2378 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 1);
2380 update_changeattr(dir
, &res
.cinfo
);
2381 nfs_post_op_update_inode(dir
, &res
.dir_attr
);
2386 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2388 struct nfs4_exception exception
= { };
2391 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2392 _nfs4_proc_remove(dir
, name
),
2394 } while (exception
.retry
);
2398 static void nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct inode
*dir
)
2400 struct nfs_server
*server
= NFS_SERVER(dir
);
2401 struct nfs_removeargs
*args
= msg
->rpc_argp
;
2402 struct nfs_removeres
*res
= msg
->rpc_resp
;
2404 args
->bitmask
= server
->cache_consistency_bitmask
;
2405 res
->server
= server
;
2406 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
2409 static int nfs4_proc_unlink_done(struct rpc_task
*task
, struct inode
*dir
)
2411 struct nfs_removeres
*res
= task
->tk_msg
.rpc_resp
;
2413 if (nfs4_async_handle_error(task
, res
->server
, NULL
) == -EAGAIN
)
2415 update_changeattr(dir
, &res
->cinfo
);
2416 nfs_post_op_update_inode(dir
, &res
->dir_attr
);
2420 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2421 struct inode
*new_dir
, struct qstr
*new_name
)
2423 struct nfs_server
*server
= NFS_SERVER(old_dir
);
2424 struct nfs4_rename_arg arg
= {
2425 .old_dir
= NFS_FH(old_dir
),
2426 .new_dir
= NFS_FH(new_dir
),
2427 .old_name
= old_name
,
2428 .new_name
= new_name
,
2429 .bitmask
= server
->attr_bitmask
,
2431 struct nfs_fattr old_fattr
, new_fattr
;
2432 struct nfs4_rename_res res
= {
2434 .old_fattr
= &old_fattr
,
2435 .new_fattr
= &new_fattr
,
2437 struct rpc_message msg
= {
2438 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2444 nfs_fattr_init(res
.old_fattr
);
2445 nfs_fattr_init(res
.new_fattr
);
2446 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2449 update_changeattr(old_dir
, &res
.old_cinfo
);
2450 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2451 update_changeattr(new_dir
, &res
.new_cinfo
);
2452 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2457 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2458 struct inode
*new_dir
, struct qstr
*new_name
)
2460 struct nfs4_exception exception
= { };
2463 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2464 _nfs4_proc_rename(old_dir
, old_name
,
2467 } while (exception
.retry
);
2471 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2473 struct nfs_server
*server
= NFS_SERVER(inode
);
2474 struct nfs4_link_arg arg
= {
2475 .fh
= NFS_FH(inode
),
2476 .dir_fh
= NFS_FH(dir
),
2478 .bitmask
= server
->attr_bitmask
,
2480 struct nfs_fattr fattr
, dir_attr
;
2481 struct nfs4_link_res res
= {
2484 .dir_attr
= &dir_attr
,
2486 struct rpc_message msg
= {
2487 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2493 nfs_fattr_init(res
.fattr
);
2494 nfs_fattr_init(res
.dir_attr
);
2495 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2497 update_changeattr(dir
, &res
.cinfo
);
2498 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2499 nfs_post_op_update_inode(inode
, res
.fattr
);
2505 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2507 struct nfs4_exception exception
= { };
2510 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2511 _nfs4_proc_link(inode
, dir
, name
),
2513 } while (exception
.retry
);
2517 struct nfs4_createdata
{
2518 struct rpc_message msg
;
2519 struct nfs4_create_arg arg
;
2520 struct nfs4_create_res res
;
2522 struct nfs_fattr fattr
;
2523 struct nfs_fattr dir_fattr
;
2526 static struct nfs4_createdata
*nfs4_alloc_createdata(struct inode
*dir
,
2527 struct qstr
*name
, struct iattr
*sattr
, u32 ftype
)
2529 struct nfs4_createdata
*data
;
2531 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
2533 struct nfs_server
*server
= NFS_SERVER(dir
);
2535 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
];
2536 data
->msg
.rpc_argp
= &data
->arg
;
2537 data
->msg
.rpc_resp
= &data
->res
;
2538 data
->arg
.dir_fh
= NFS_FH(dir
);
2539 data
->arg
.server
= server
;
2540 data
->arg
.name
= name
;
2541 data
->arg
.attrs
= sattr
;
2542 data
->arg
.ftype
= ftype
;
2543 data
->arg
.bitmask
= server
->attr_bitmask
;
2544 data
->res
.server
= server
;
2545 data
->res
.fh
= &data
->fh
;
2546 data
->res
.fattr
= &data
->fattr
;
2547 data
->res
.dir_fattr
= &data
->dir_fattr
;
2548 nfs_fattr_init(data
->res
.fattr
);
2549 nfs_fattr_init(data
->res
.dir_fattr
);
2554 static int nfs4_do_create(struct inode
*dir
, struct dentry
*dentry
, struct nfs4_createdata
*data
)
2556 int status
= nfs4_call_sync(NFS_SERVER(dir
), &data
->msg
,
2557 &data
->arg
, &data
->res
, 1);
2559 update_changeattr(dir
, &data
->res
.dir_cinfo
);
2560 nfs_post_op_update_inode(dir
, data
->res
.dir_fattr
);
2561 status
= nfs_instantiate(dentry
, data
->res
.fh
, data
->res
.fattr
);
2566 static void nfs4_free_createdata(struct nfs4_createdata
*data
)
2571 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2572 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2574 struct nfs4_createdata
*data
;
2575 int status
= -ENAMETOOLONG
;
2577 if (len
> NFS4_MAXPATHLEN
)
2581 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4LNK
);
2585 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
];
2586 data
->arg
.u
.symlink
.pages
= &page
;
2587 data
->arg
.u
.symlink
.len
= len
;
2589 status
= nfs4_do_create(dir
, dentry
, data
);
2591 nfs4_free_createdata(data
);
2596 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2597 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2599 struct nfs4_exception exception
= { };
2602 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2603 _nfs4_proc_symlink(dir
, dentry
, page
,
2606 } while (exception
.retry
);
2610 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2611 struct iattr
*sattr
)
2613 struct nfs4_createdata
*data
;
2614 int status
= -ENOMEM
;
2616 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4DIR
);
2620 status
= nfs4_do_create(dir
, dentry
, data
);
2622 nfs4_free_createdata(data
);
2627 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2628 struct iattr
*sattr
)
2630 struct nfs4_exception exception
= { };
2633 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2634 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2636 } while (exception
.retry
);
2640 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2641 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2643 struct inode
*dir
= dentry
->d_inode
;
2644 struct nfs4_readdir_arg args
= {
2649 .bitmask
= NFS_SERVER(dentry
->d_inode
)->cache_consistency_bitmask
,
2651 struct nfs4_readdir_res res
;
2652 struct rpc_message msg
= {
2653 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2660 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__
,
2661 dentry
->d_parent
->d_name
.name
,
2662 dentry
->d_name
.name
,
2663 (unsigned long long)cookie
);
2664 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2665 res
.pgbase
= args
.pgbase
;
2666 status
= nfs4_call_sync(NFS_SERVER(dir
), &msg
, &args
, &res
, 0);
2668 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2670 nfs_invalidate_atime(dir
);
2672 dprintk("%s: returns %d\n", __func__
, status
);
2676 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2677 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2679 struct nfs4_exception exception
= { };
2682 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2683 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2686 } while (exception
.retry
);
2690 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2691 struct iattr
*sattr
, dev_t rdev
)
2693 struct nfs4_createdata
*data
;
2694 int mode
= sattr
->ia_mode
;
2695 int status
= -ENOMEM
;
2697 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2698 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2700 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4SOCK
);
2705 data
->arg
.ftype
= NF4FIFO
;
2706 else if (S_ISBLK(mode
)) {
2707 data
->arg
.ftype
= NF4BLK
;
2708 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2709 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2711 else if (S_ISCHR(mode
)) {
2712 data
->arg
.ftype
= NF4CHR
;
2713 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2714 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2717 status
= nfs4_do_create(dir
, dentry
, data
);
2719 nfs4_free_createdata(data
);
2724 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2725 struct iattr
*sattr
, dev_t rdev
)
2727 struct nfs4_exception exception
= { };
2730 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2731 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2733 } while (exception
.retry
);
2737 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2738 struct nfs_fsstat
*fsstat
)
2740 struct nfs4_statfs_arg args
= {
2742 .bitmask
= server
->attr_bitmask
,
2744 struct nfs4_statfs_res res
= {
2747 struct rpc_message msg
= {
2748 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2753 nfs_fattr_init(fsstat
->fattr
);
2754 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2757 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2759 struct nfs4_exception exception
= { };
2762 err
= nfs4_handle_exception(server
,
2763 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2765 } while (exception
.retry
);
2769 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2770 struct nfs_fsinfo
*fsinfo
)
2772 struct nfs4_fsinfo_arg args
= {
2774 .bitmask
= server
->attr_bitmask
,
2776 struct nfs4_fsinfo_res res
= {
2779 struct rpc_message msg
= {
2780 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
2785 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2788 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2790 struct nfs4_exception exception
= { };
2794 err
= nfs4_handle_exception(server
,
2795 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2797 } while (exception
.retry
);
2801 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2803 nfs_fattr_init(fsinfo
->fattr
);
2804 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2807 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2808 struct nfs_pathconf
*pathconf
)
2810 struct nfs4_pathconf_arg args
= {
2812 .bitmask
= server
->attr_bitmask
,
2814 struct nfs4_pathconf_res res
= {
2815 .pathconf
= pathconf
,
2817 struct rpc_message msg
= {
2818 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2823 /* None of the pathconf attributes are mandatory to implement */
2824 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2825 memset(pathconf
, 0, sizeof(*pathconf
));
2829 nfs_fattr_init(pathconf
->fattr
);
2830 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2833 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2834 struct nfs_pathconf
*pathconf
)
2836 struct nfs4_exception exception
= { };
2840 err
= nfs4_handle_exception(server
,
2841 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2843 } while (exception
.retry
);
2847 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
2849 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2851 if (nfs4_async_handle_error(task
, server
, data
->args
.context
->state
) == -EAGAIN
) {
2852 rpc_restart_call(task
);
2856 nfs_invalidate_atime(data
->inode
);
2857 if (task
->tk_status
> 0)
2858 renew_lease(server
, data
->timestamp
);
2862 static void nfs4_proc_read_setup(struct nfs_read_data
*data
, struct rpc_message
*msg
)
2864 data
->timestamp
= jiffies
;
2865 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
];
2868 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2870 struct inode
*inode
= data
->inode
;
2872 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), data
->args
.context
->state
) == -EAGAIN
) {
2873 rpc_restart_call(task
);
2876 if (task
->tk_status
>= 0) {
2877 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2878 nfs_post_op_update_inode_force_wcc(inode
, data
->res
.fattr
);
2883 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
2885 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2887 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
2888 data
->res
.server
= server
;
2889 data
->timestamp
= jiffies
;
2891 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
];
2894 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2896 struct inode
*inode
= data
->inode
;
2898 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), NULL
) == -EAGAIN
) {
2899 rpc_restart_call(task
);
2902 nfs_refresh_inode(inode
, data
->res
.fattr
);
2906 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
2908 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2910 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
2911 data
->res
.server
= server
;
2912 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
];
2916 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2917 * standalone procedure for queueing an asynchronous RENEW.
2919 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
2921 struct nfs_client
*clp
= (struct nfs_client
*)task
->tk_msg
.rpc_argp
;
2922 unsigned long timestamp
= (unsigned long)data
;
2924 if (task
->tk_status
< 0) {
2925 /* Unless we're shutting down, schedule state recovery! */
2926 if (test_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
) != 0)
2927 nfs4_schedule_state_recovery(clp
);
2930 spin_lock(&clp
->cl_lock
);
2931 if (time_before(clp
->cl_last_renewal
,timestamp
))
2932 clp
->cl_last_renewal
= timestamp
;
2933 spin_unlock(&clp
->cl_lock
);
2936 static const struct rpc_call_ops nfs4_renew_ops
= {
2937 .rpc_call_done
= nfs4_renew_done
,
2940 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2942 struct rpc_message msg
= {
2943 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2948 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2949 &nfs4_renew_ops
, (void *)jiffies
);
2952 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2954 struct rpc_message msg
= {
2955 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2959 unsigned long now
= jiffies
;
2962 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2965 spin_lock(&clp
->cl_lock
);
2966 if (time_before(clp
->cl_last_renewal
,now
))
2967 clp
->cl_last_renewal
= now
;
2968 spin_unlock(&clp
->cl_lock
);
2972 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2974 return (server
->caps
& NFS_CAP_ACLS
)
2975 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2976 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2979 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2980 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2983 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2985 static void buf_to_pages(const void *buf
, size_t buflen
,
2986 struct page
**pages
, unsigned int *pgbase
)
2988 const void *p
= buf
;
2990 *pgbase
= offset_in_page(buf
);
2992 while (p
< buf
+ buflen
) {
2993 *(pages
++) = virt_to_page(p
);
2994 p
+= PAGE_CACHE_SIZE
;
2998 struct nfs4_cached_acl
{
3004 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
3006 struct nfs_inode
*nfsi
= NFS_I(inode
);
3008 spin_lock(&inode
->i_lock
);
3009 kfree(nfsi
->nfs4_acl
);
3010 nfsi
->nfs4_acl
= acl
;
3011 spin_unlock(&inode
->i_lock
);
3014 static void nfs4_zap_acl_attr(struct inode
*inode
)
3016 nfs4_set_cached_acl(inode
, NULL
);
3019 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
3021 struct nfs_inode
*nfsi
= NFS_I(inode
);
3022 struct nfs4_cached_acl
*acl
;
3025 spin_lock(&inode
->i_lock
);
3026 acl
= nfsi
->nfs4_acl
;
3029 if (buf
== NULL
) /* user is just asking for length */
3031 if (acl
->cached
== 0)
3033 ret
= -ERANGE
; /* see getxattr(2) man page */
3034 if (acl
->len
> buflen
)
3036 memcpy(buf
, acl
->data
, acl
->len
);
3040 spin_unlock(&inode
->i_lock
);
3044 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
3046 struct nfs4_cached_acl
*acl
;
3048 if (buf
&& acl_len
<= PAGE_SIZE
) {
3049 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
3053 memcpy(acl
->data
, buf
, acl_len
);
3055 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
3062 nfs4_set_cached_acl(inode
, acl
);
3065 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3067 struct page
*pages
[NFS4ACL_MAXPAGES
];
3068 struct nfs_getaclargs args
= {
3069 .fh
= NFS_FH(inode
),
3073 struct nfs_getaclres res
= {
3077 struct rpc_message msg
= {
3078 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
3082 struct page
*localpage
= NULL
;
3085 if (buflen
< PAGE_SIZE
) {
3086 /* As long as we're doing a round trip to the server anyway,
3087 * let's be prepared for a page of acl data. */
3088 localpage
= alloc_page(GFP_KERNEL
);
3089 resp_buf
= page_address(localpage
);
3090 if (localpage
== NULL
)
3092 args
.acl_pages
[0] = localpage
;
3093 args
.acl_pgbase
= 0;
3094 args
.acl_len
= PAGE_SIZE
;
3097 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
3099 ret
= nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
3102 if (res
.acl_len
> args
.acl_len
)
3103 nfs4_write_cached_acl(inode
, NULL
, res
.acl_len
);
3105 nfs4_write_cached_acl(inode
, resp_buf
, res
.acl_len
);
3108 if (res
.acl_len
> buflen
)
3111 memcpy(buf
, resp_buf
, res
.acl_len
);
3116 __free_page(localpage
);
3120 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
3122 struct nfs4_exception exception
= { };
3125 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
3128 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
3129 } while (exception
.retry
);
3133 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
3135 struct nfs_server
*server
= NFS_SERVER(inode
);
3138 if (!nfs4_server_supports_acls(server
))
3140 ret
= nfs_revalidate_inode(server
, inode
);
3143 if (NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ACL
)
3144 nfs_zap_acl_cache(inode
);
3145 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
3148 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
3151 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3153 struct nfs_server
*server
= NFS_SERVER(inode
);
3154 struct page
*pages
[NFS4ACL_MAXPAGES
];
3155 struct nfs_setaclargs arg
= {
3156 .fh
= NFS_FH(inode
),
3160 struct nfs_setaclres res
;
3161 struct rpc_message msg
= {
3162 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
3168 if (!nfs4_server_supports_acls(server
))
3170 nfs_inode_return_delegation(inode
);
3171 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
3172 ret
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
3173 nfs_access_zap_cache(inode
);
3174 nfs_zap_acl_cache(inode
);
3178 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
3180 struct nfs4_exception exception
= { };
3183 err
= nfs4_handle_exception(NFS_SERVER(inode
),
3184 __nfs4_proc_set_acl(inode
, buf
, buflen
),
3186 } while (exception
.retry
);
3191 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs4_state
*state
)
3193 struct nfs_client
*clp
= server
->nfs_client
;
3195 if (!clp
|| task
->tk_status
>= 0)
3197 switch(task
->tk_status
) {
3198 case -NFS4ERR_ADMIN_REVOKED
:
3199 case -NFS4ERR_BAD_STATEID
:
3200 case -NFS4ERR_OPENMODE
:
3203 nfs4_state_mark_reclaim_nograce(clp
, state
);
3204 case -NFS4ERR_STALE_CLIENTID
:
3205 case -NFS4ERR_STALE_STATEID
:
3206 case -NFS4ERR_EXPIRED
:
3207 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
);
3208 nfs4_schedule_state_recovery(clp
);
3209 if (test_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) == 0)
3210 rpc_wake_up_queued_task(&clp
->cl_rpcwaitq
, task
);
3211 task
->tk_status
= 0;
3213 case -NFS4ERR_DELAY
:
3214 nfs_inc_server_stats(server
, NFSIOS_DELAY
);
3215 case -NFS4ERR_GRACE
:
3216 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
3217 task
->tk_status
= 0;
3219 case -NFS4ERR_OLD_STATEID
:
3220 task
->tk_status
= 0;
3223 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
3227 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
3229 nfs4_verifier sc_verifier
;
3230 struct nfs4_setclientid setclientid
= {
3231 .sc_verifier
= &sc_verifier
,
3234 struct rpc_message msg
= {
3235 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
3236 .rpc_argp
= &setclientid
,
3244 p
= (__be32
*)sc_verifier
.data
;
3245 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
3246 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
3249 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
3250 sizeof(setclientid
.sc_name
), "%s/%s %s %s %u",
3252 rpc_peeraddr2str(clp
->cl_rpcclient
,
3254 rpc_peeraddr2str(clp
->cl_rpcclient
,
3256 clp
->cl_rpcclient
->cl_auth
->au_ops
->au_name
,
3257 clp
->cl_id_uniquifier
);
3258 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
3259 sizeof(setclientid
.sc_netid
),
3260 rpc_peeraddr2str(clp
->cl_rpcclient
,
3261 RPC_DISPLAY_NETID
));
3262 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
3263 sizeof(setclientid
.sc_uaddr
), "%s.%u.%u",
3264 clp
->cl_ipaddr
, port
>> 8, port
& 255);
3266 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3267 if (status
!= -NFS4ERR_CLID_INUSE
)
3272 ssleep(clp
->cl_lease_time
+ 1);
3274 if (++clp
->cl_id_uniquifier
== 0)
3280 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3282 struct nfs_fsinfo fsinfo
;
3283 struct rpc_message msg
= {
3284 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
3286 .rpc_resp
= &fsinfo
,
3293 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3295 spin_lock(&clp
->cl_lock
);
3296 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
3297 clp
->cl_last_renewal
= now
;
3298 spin_unlock(&clp
->cl_lock
);
3303 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3308 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
3312 case -NFS4ERR_RESOURCE
:
3313 /* The IBM lawyers misread another document! */
3314 case -NFS4ERR_DELAY
:
3315 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
3321 struct nfs4_delegreturndata
{
3322 struct nfs4_delegreturnargs args
;
3323 struct nfs4_delegreturnres res
;
3325 nfs4_stateid stateid
;
3326 unsigned long timestamp
;
3327 struct nfs_fattr fattr
;
3331 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3333 struct nfs4_delegreturndata
*data
= calldata
;
3334 data
->rpc_status
= task
->tk_status
;
3335 if (data
->rpc_status
== 0)
3336 renew_lease(data
->res
.server
, data
->timestamp
);
3339 static void nfs4_delegreturn_release(void *calldata
)
3344 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3345 .rpc_call_done
= nfs4_delegreturn_done
,
3346 .rpc_release
= nfs4_delegreturn_release
,
3349 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3351 struct nfs4_delegreturndata
*data
;
3352 struct nfs_server
*server
= NFS_SERVER(inode
);
3353 struct rpc_task
*task
;
3354 struct rpc_message msg
= {
3355 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3358 struct rpc_task_setup task_setup_data
= {
3359 .rpc_client
= server
->client
,
3360 .rpc_message
= &msg
,
3361 .callback_ops
= &nfs4_delegreturn_ops
,
3362 .flags
= RPC_TASK_ASYNC
,
3366 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3369 data
->args
.fhandle
= &data
->fh
;
3370 data
->args
.stateid
= &data
->stateid
;
3371 data
->args
.bitmask
= server
->attr_bitmask
;
3372 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3373 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3374 data
->res
.fattr
= &data
->fattr
;
3375 data
->res
.server
= server
;
3376 data
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3377 nfs_fattr_init(data
->res
.fattr
);
3378 data
->timestamp
= jiffies
;
3379 data
->rpc_status
= 0;
3381 task_setup_data
.callback_data
= data
;
3382 msg
.rpc_argp
= &data
->args
,
3383 msg
.rpc_resp
= &data
->res
,
3384 task
= rpc_run_task(&task_setup_data
);
3386 return PTR_ERR(task
);
3389 status
= nfs4_wait_for_completion_rpc_task(task
);
3392 status
= data
->rpc_status
;
3395 nfs_refresh_inode(inode
, &data
->fattr
);
3401 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3403 struct nfs_server
*server
= NFS_SERVER(inode
);
3404 struct nfs4_exception exception
= { };
3407 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
, issync
);
3409 case -NFS4ERR_STALE_STATEID
:
3410 case -NFS4ERR_EXPIRED
:
3414 err
= nfs4_handle_exception(server
, err
, &exception
);
3415 } while (exception
.retry
);
3419 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3420 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3423 * sleep, with exponential backoff, and retry the LOCK operation.
3425 static unsigned long
3426 nfs4_set_lock_task_retry(unsigned long timeout
)
3428 schedule_timeout_killable(timeout
);
3430 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3431 return NFS4_LOCK_MAXTIMEOUT
;
3435 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3437 struct inode
*inode
= state
->inode
;
3438 struct nfs_server
*server
= NFS_SERVER(inode
);
3439 struct nfs_client
*clp
= server
->nfs_client
;
3440 struct nfs_lockt_args arg
= {
3441 .fh
= NFS_FH(inode
),
3444 struct nfs_lockt_res res
= {
3447 struct rpc_message msg
= {
3448 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3451 .rpc_cred
= state
->owner
->so_cred
,
3453 struct nfs4_lock_state
*lsp
;
3456 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3457 status
= nfs4_set_lock_state(state
, request
);
3460 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3461 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3462 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
3465 request
->fl_type
= F_UNLCK
;
3467 case -NFS4ERR_DENIED
:
3470 request
->fl_ops
->fl_release_private(request
);
3475 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3477 struct nfs4_exception exception
= { };
3481 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3482 _nfs4_proc_getlk(state
, cmd
, request
),
3484 } while (exception
.retry
);
3488 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3491 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3493 res
= posix_lock_file_wait(file
, fl
);
3496 res
= flock_lock_file_wait(file
, fl
);
3504 struct nfs4_unlockdata
{
3505 struct nfs_locku_args arg
;
3506 struct nfs_locku_res res
;
3507 struct nfs4_lock_state
*lsp
;
3508 struct nfs_open_context
*ctx
;
3509 struct file_lock fl
;
3510 const struct nfs_server
*server
;
3511 unsigned long timestamp
;
3514 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3515 struct nfs_open_context
*ctx
,
3516 struct nfs4_lock_state
*lsp
,
3517 struct nfs_seqid
*seqid
)
3519 struct nfs4_unlockdata
*p
;
3520 struct inode
*inode
= lsp
->ls_state
->inode
;
3522 p
= kmalloc(sizeof(*p
), GFP_KERNEL
);
3525 p
->arg
.fh
= NFS_FH(inode
);
3527 p
->arg
.seqid
= seqid
;
3528 p
->res
.seqid
= seqid
;
3529 p
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3530 p
->arg
.stateid
= &lsp
->ls_stateid
;
3532 atomic_inc(&lsp
->ls_count
);
3533 /* Ensure we don't close file until we're done freeing locks! */
3534 p
->ctx
= get_nfs_open_context(ctx
);
3535 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3536 p
->server
= NFS_SERVER(inode
);
3540 static void nfs4_locku_release_calldata(void *data
)
3542 struct nfs4_unlockdata
*calldata
= data
;
3543 nfs_free_seqid(calldata
->arg
.seqid
);
3544 nfs4_put_lock_state(calldata
->lsp
);
3545 put_nfs_open_context(calldata
->ctx
);
3549 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3551 struct nfs4_unlockdata
*calldata
= data
;
3553 if (RPC_ASSASSINATED(task
))
3555 switch (task
->tk_status
) {
3557 memcpy(calldata
->lsp
->ls_stateid
.data
,
3558 calldata
->res
.stateid
.data
,
3559 sizeof(calldata
->lsp
->ls_stateid
.data
));
3560 renew_lease(calldata
->server
, calldata
->timestamp
);
3562 case -NFS4ERR_BAD_STATEID
:
3563 case -NFS4ERR_OLD_STATEID
:
3564 case -NFS4ERR_STALE_STATEID
:
3565 case -NFS4ERR_EXPIRED
:
3568 if (nfs4_async_handle_error(task
, calldata
->server
, NULL
) == -EAGAIN
)
3569 rpc_restart_call(task
);
3573 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3575 struct nfs4_unlockdata
*calldata
= data
;
3577 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3579 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3580 /* Note: exit _without_ running nfs4_locku_done */
3581 task
->tk_action
= NULL
;
3584 calldata
->timestamp
= jiffies
;
3585 rpc_call_start(task
);
3588 static const struct rpc_call_ops nfs4_locku_ops
= {
3589 .rpc_call_prepare
= nfs4_locku_prepare
,
3590 .rpc_call_done
= nfs4_locku_done
,
3591 .rpc_release
= nfs4_locku_release_calldata
,
3594 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3595 struct nfs_open_context
*ctx
,
3596 struct nfs4_lock_state
*lsp
,
3597 struct nfs_seqid
*seqid
)
3599 struct nfs4_unlockdata
*data
;
3600 struct rpc_message msg
= {
3601 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3602 .rpc_cred
= ctx
->cred
,
3604 struct rpc_task_setup task_setup_data
= {
3605 .rpc_client
= NFS_CLIENT(lsp
->ls_state
->inode
),
3606 .rpc_message
= &msg
,
3607 .callback_ops
= &nfs4_locku_ops
,
3608 .workqueue
= nfsiod_workqueue
,
3609 .flags
= RPC_TASK_ASYNC
,
3612 /* Ensure this is an unlock - when canceling a lock, the
3613 * canceled lock is passed in, and it won't be an unlock.
3615 fl
->fl_type
= F_UNLCK
;
3617 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3619 nfs_free_seqid(seqid
);
3620 return ERR_PTR(-ENOMEM
);
3623 msg
.rpc_argp
= &data
->arg
,
3624 msg
.rpc_resp
= &data
->res
,
3625 task_setup_data
.callback_data
= data
;
3626 return rpc_run_task(&task_setup_data
);
3629 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3631 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3632 struct nfs_seqid
*seqid
;
3633 struct nfs4_lock_state
*lsp
;
3634 struct rpc_task
*task
;
3636 unsigned char fl_flags
= request
->fl_flags
;
3638 status
= nfs4_set_lock_state(state
, request
);
3639 /* Unlock _before_ we do the RPC call */
3640 request
->fl_flags
|= FL_EXISTS
;
3641 down_read(&nfsi
->rwsem
);
3642 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
) {
3643 up_read(&nfsi
->rwsem
);
3646 up_read(&nfsi
->rwsem
);
3649 /* Is this a delegated lock? */
3650 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3652 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3653 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3657 task
= nfs4_do_unlck(request
, nfs_file_open_context(request
->fl_file
), lsp
, seqid
);
3658 status
= PTR_ERR(task
);
3661 status
= nfs4_wait_for_completion_rpc_task(task
);
3664 request
->fl_flags
= fl_flags
;
3668 struct nfs4_lockdata
{
3669 struct nfs_lock_args arg
;
3670 struct nfs_lock_res res
;
3671 struct nfs4_lock_state
*lsp
;
3672 struct nfs_open_context
*ctx
;
3673 struct file_lock fl
;
3674 unsigned long timestamp
;
3679 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
3680 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
3682 struct nfs4_lockdata
*p
;
3683 struct inode
*inode
= lsp
->ls_state
->inode
;
3684 struct nfs_server
*server
= NFS_SERVER(inode
);
3686 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3690 p
->arg
.fh
= NFS_FH(inode
);
3692 p
->arg
.open_seqid
= nfs_alloc_seqid(&lsp
->ls_state
->owner
->so_seqid
);
3693 if (p
->arg
.open_seqid
== NULL
)
3695 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3696 if (p
->arg
.lock_seqid
== NULL
)
3697 goto out_free_seqid
;
3698 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
3699 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
3700 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3701 p
->res
.lock_seqid
= p
->arg
.lock_seqid
;
3702 p
->res
.seq_res
.sr_slotid
= NFS4_MAX_SLOT_TABLE
;
3704 atomic_inc(&lsp
->ls_count
);
3705 p
->ctx
= get_nfs_open_context(ctx
);
3706 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3709 nfs_free_seqid(p
->arg
.open_seqid
);
3715 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
3717 struct nfs4_lockdata
*data
= calldata
;
3718 struct nfs4_state
*state
= data
->lsp
->ls_state
;
3720 dprintk("%s: begin!\n", __func__
);
3721 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
3723 /* Do we need to do an open_to_lock_owner? */
3724 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
3725 if (nfs_wait_on_sequence(data
->arg
.open_seqid
, task
) != 0)
3727 data
->arg
.open_stateid
= &state
->stateid
;
3728 data
->arg
.new_lock_owner
= 1;
3729 data
->res
.open_seqid
= data
->arg
.open_seqid
;
3731 data
->arg
.new_lock_owner
= 0;
3732 data
->timestamp
= jiffies
;
3733 rpc_call_start(task
);
3734 dprintk("%s: done!, ret = %d\n", __func__
, data
->rpc_status
);
3737 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
3739 struct nfs4_lockdata
*data
= calldata
;
3741 dprintk("%s: begin!\n", __func__
);
3743 data
->rpc_status
= task
->tk_status
;
3744 if (RPC_ASSASSINATED(task
))
3746 if (data
->arg
.new_lock_owner
!= 0) {
3747 if (data
->rpc_status
== 0)
3748 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
3752 if (data
->rpc_status
== 0) {
3753 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
3754 sizeof(data
->lsp
->ls_stateid
.data
));
3755 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
3756 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
3759 dprintk("%s: done, ret = %d!\n", __func__
, data
->rpc_status
);
3762 static void nfs4_lock_release(void *calldata
)
3764 struct nfs4_lockdata
*data
= calldata
;
3766 dprintk("%s: begin!\n", __func__
);
3767 nfs_free_seqid(data
->arg
.open_seqid
);
3768 if (data
->cancelled
!= 0) {
3769 struct rpc_task
*task
;
3770 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
3771 data
->arg
.lock_seqid
);
3774 dprintk("%s: cancelling lock!\n", __func__
);
3776 nfs_free_seqid(data
->arg
.lock_seqid
);
3777 nfs4_put_lock_state(data
->lsp
);
3778 put_nfs_open_context(data
->ctx
);
3780 dprintk("%s: done!\n", __func__
);
3783 static const struct rpc_call_ops nfs4_lock_ops
= {
3784 .rpc_call_prepare
= nfs4_lock_prepare
,
3785 .rpc_call_done
= nfs4_lock_done
,
3786 .rpc_release
= nfs4_lock_release
,
3789 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int reclaim
)
3791 struct nfs4_lockdata
*data
;
3792 struct rpc_task
*task
;
3793 struct rpc_message msg
= {
3794 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
3795 .rpc_cred
= state
->owner
->so_cred
,
3797 struct rpc_task_setup task_setup_data
= {
3798 .rpc_client
= NFS_CLIENT(state
->inode
),
3799 .rpc_message
= &msg
,
3800 .callback_ops
= &nfs4_lock_ops
,
3801 .workqueue
= nfsiod_workqueue
,
3802 .flags
= RPC_TASK_ASYNC
,
3806 dprintk("%s: begin!\n", __func__
);
3807 data
= nfs4_alloc_lockdata(fl
, nfs_file_open_context(fl
->fl_file
),
3808 fl
->fl_u
.nfs4_fl
.owner
);
3812 data
->arg
.block
= 1;
3814 data
->arg
.reclaim
= 1;
3815 msg
.rpc_argp
= &data
->arg
,
3816 msg
.rpc_resp
= &data
->res
,
3817 task_setup_data
.callback_data
= data
;
3818 task
= rpc_run_task(&task_setup_data
);
3820 return PTR_ERR(task
);
3821 ret
= nfs4_wait_for_completion_rpc_task(task
);
3823 ret
= data
->rpc_status
;
3824 if (ret
== -NFS4ERR_DENIED
)
3827 data
->cancelled
= 1;
3829 dprintk("%s: done, ret = %d!\n", __func__
, ret
);
3833 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
3835 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3836 struct nfs4_exception exception
= { };
3840 /* Cache the lock if possible... */
3841 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3843 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
3844 if (err
!= -NFS4ERR_DELAY
)
3846 nfs4_handle_exception(server
, err
, &exception
);
3847 } while (exception
.retry
);
3851 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
3853 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3854 struct nfs4_exception exception
= { };
3857 err
= nfs4_set_lock_state(state
, request
);
3861 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3863 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
3864 if (err
!= -NFS4ERR_DELAY
)
3866 nfs4_handle_exception(server
, err
, &exception
);
3867 } while (exception
.retry
);
3871 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3873 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3874 unsigned char fl_flags
= request
->fl_flags
;
3877 /* Is this a delegated open? */
3878 status
= nfs4_set_lock_state(state
, request
);
3881 request
->fl_flags
|= FL_ACCESS
;
3882 status
= do_vfs_lock(request
->fl_file
, request
);
3885 down_read(&nfsi
->rwsem
);
3886 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3887 /* Yes: cache locks! */
3888 /* ...but avoid races with delegation recall... */
3889 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
3890 status
= do_vfs_lock(request
->fl_file
, request
);
3893 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
3896 /* Note: we always want to sleep here! */
3897 request
->fl_flags
= fl_flags
| FL_SLEEP
;
3898 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3899 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __func__
);
3901 up_read(&nfsi
->rwsem
);
3903 request
->fl_flags
= fl_flags
;
3907 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3909 struct nfs4_exception exception
= { };
3913 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3914 _nfs4_proc_setlk(state
, cmd
, request
),
3916 } while (exception
.retry
);
3921 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3923 struct nfs_open_context
*ctx
;
3924 struct nfs4_state
*state
;
3925 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3928 /* verify open state */
3929 ctx
= nfs_file_open_context(filp
);
3932 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3936 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3938 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3941 if (request
->fl_type
== F_UNLCK
)
3942 return nfs4_proc_unlck(state
, cmd
, request
);
3945 status
= nfs4_proc_setlk(state
, cmd
, request
);
3946 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3948 timeout
= nfs4_set_lock_task_retry(timeout
);
3949 status
= -ERESTARTSYS
;
3952 } while(status
< 0);
3956 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
3958 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3959 struct nfs4_exception exception
= { };
3962 err
= nfs4_set_lock_state(state
, fl
);
3966 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, 0);
3967 if (err
!= -NFS4ERR_DELAY
)
3969 err
= nfs4_handle_exception(server
, err
, &exception
);
3970 } while (exception
.retry
);
3975 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3977 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
3978 size_t buflen
, int flags
)
3980 struct inode
*inode
= dentry
->d_inode
;
3982 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3985 return nfs4_proc_set_acl(inode
, buf
, buflen
);
3988 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3989 * and that's what we'll do for e.g. user attributes that haven't been set.
3990 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3991 * attributes in kernel-managed attribute namespaces. */
3992 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
3995 struct inode
*inode
= dentry
->d_inode
;
3997 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
4000 return nfs4_proc_get_acl(inode
, buf
, buflen
);
4003 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
4005 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
4007 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
4009 if (buf
&& buflen
< len
)
4012 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
4016 static void nfs_fixup_referral_attributes(struct nfs_fattr
*fattr
)
4018 if (!((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) &&
4019 (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
4020 (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)))
4023 fattr
->valid
|= NFS_ATTR_FATTR_TYPE
| NFS_ATTR_FATTR_MODE
|
4024 NFS_ATTR_FATTR_NLINK
;
4025 fattr
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
4029 int nfs4_proc_fs_locations(struct inode
*dir
, const struct qstr
*name
,
4030 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
4032 struct nfs_server
*server
= NFS_SERVER(dir
);
4034 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
4035 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
4037 struct nfs4_fs_locations_arg args
= {
4038 .dir_fh
= NFS_FH(dir
),
4043 struct nfs4_fs_locations_res res
= {
4044 .fs_locations
= fs_locations
,
4046 struct rpc_message msg
= {
4047 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
4053 dprintk("%s: start\n", __func__
);
4054 nfs_fattr_init(&fs_locations
->fattr
);
4055 fs_locations
->server
= server
;
4056 fs_locations
->nlocations
= 0;
4057 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
4058 nfs_fixup_referral_attributes(&fs_locations
->fattr
);
4059 dprintk("%s: returned status = %d\n", __func__
, status
);
4063 #ifdef CONFIG_NFS_V4_1
4064 /* Destroy the slot table */
4065 static void nfs4_destroy_slot_table(struct nfs4_session
*session
)
4067 if (session
->fc_slot_table
.slots
== NULL
)
4069 kfree(session
->fc_slot_table
.slots
);
4070 session
->fc_slot_table
.slots
= NULL
;
4074 struct nfs4_session
*nfs4_alloc_session(struct nfs_client
*clp
)
4076 struct nfs4_session
*session
;
4077 struct nfs4_slot_table
*tbl
;
4079 session
= kzalloc(sizeof(struct nfs4_session
), GFP_KERNEL
);
4082 tbl
= &session
->fc_slot_table
;
4083 spin_lock_init(&tbl
->slot_tbl_lock
);
4084 rpc_init_wait_queue(&tbl
->slot_tbl_waitq
, "Slot table");
4089 void nfs4_destroy_session(struct nfs4_session
*session
)
4091 nfs4_destroy_slot_table(session
);
4095 #endif /* CONFIG_NFS_V4_1 */
4097 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
4098 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
4099 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
4100 .recover_open
= nfs4_open_reclaim
,
4101 .recover_lock
= nfs4_lock_reclaim
,
4104 struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops
= {
4105 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
4106 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
4107 .recover_open
= nfs4_open_expired
,
4108 .recover_lock
= nfs4_lock_expired
,
4111 static const struct inode_operations nfs4_file_inode_operations
= {
4112 .permission
= nfs_permission
,
4113 .getattr
= nfs_getattr
,
4114 .setattr
= nfs_setattr
,
4115 .getxattr
= nfs4_getxattr
,
4116 .setxattr
= nfs4_setxattr
,
4117 .listxattr
= nfs4_listxattr
,
4120 const struct nfs_rpc_ops nfs_v4_clientops
= {
4121 .version
= 4, /* protocol version */
4122 .dentry_ops
= &nfs4_dentry_operations
,
4123 .dir_inode_ops
= &nfs4_dir_inode_operations
,
4124 .file_inode_ops
= &nfs4_file_inode_operations
,
4125 .getroot
= nfs4_proc_get_root
,
4126 .getattr
= nfs4_proc_getattr
,
4127 .setattr
= nfs4_proc_setattr
,
4128 .lookupfh
= nfs4_proc_lookupfh
,
4129 .lookup
= nfs4_proc_lookup
,
4130 .access
= nfs4_proc_access
,
4131 .readlink
= nfs4_proc_readlink
,
4132 .create
= nfs4_proc_create
,
4133 .remove
= nfs4_proc_remove
,
4134 .unlink_setup
= nfs4_proc_unlink_setup
,
4135 .unlink_done
= nfs4_proc_unlink_done
,
4136 .rename
= nfs4_proc_rename
,
4137 .link
= nfs4_proc_link
,
4138 .symlink
= nfs4_proc_symlink
,
4139 .mkdir
= nfs4_proc_mkdir
,
4140 .rmdir
= nfs4_proc_remove
,
4141 .readdir
= nfs4_proc_readdir
,
4142 .mknod
= nfs4_proc_mknod
,
4143 .statfs
= nfs4_proc_statfs
,
4144 .fsinfo
= nfs4_proc_fsinfo
,
4145 .pathconf
= nfs4_proc_pathconf
,
4146 .set_capabilities
= nfs4_server_capabilities
,
4147 .decode_dirent
= nfs4_decode_dirent
,
4148 .read_setup
= nfs4_proc_read_setup
,
4149 .read_done
= nfs4_read_done
,
4150 .write_setup
= nfs4_proc_write_setup
,
4151 .write_done
= nfs4_write_done
,
4152 .commit_setup
= nfs4_proc_commit_setup
,
4153 .commit_done
= nfs4_commit_done
,
4154 .lock
= nfs4_proc_lock
,
4155 .clear_acl_cache
= nfs4_zap_acl_attr
,
4156 .close_context
= nfs4_close_context
,