4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/sunrpc/clnt.h>
43 #include <linux/nfs.h>
44 #include <linux/nfs4.h>
45 #include <linux/nfs_fs.h>
46 #include <linux/nfs_page.h>
47 #include <linux/namei.h>
48 #include <linux/mount.h>
49 #include <linux/module.h>
50 #include <linux/sunrpc/bc_xprt.h>
53 #include "delegation.h"
58 #define NFSDBG_FACILITY NFSDBG_PROC
60 #define NFS4_POLL_RETRY_MIN (HZ/10)
61 #define NFS4_POLL_RETRY_MAX (15*HZ)
63 #define NFS4_MAX_LOOP_ON_RECOVER (10)
66 static int _nfs4_proc_open(struct nfs4_opendata *data);
67 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
68 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
69 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
70 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
71 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
73 /* Prevent leaks of NFSv4 errors into userland */
74 static int nfs4_map_errors(int err)
79 case -NFS4ERR_RESOURCE:
82 dprintk("%s could not handle NFSv4 error %d\n",
90 * This is our standard bitmap for GETATTR requests.
92 const u32 nfs4_fattr_bitmap[2] = {
97 | FATTR4_WORD0_FILEID,
99 | FATTR4_WORD1_NUMLINKS
101 | FATTR4_WORD1_OWNER_GROUP
102 | FATTR4_WORD1_RAWDEV
103 | FATTR4_WORD1_SPACE_USED
104 | FATTR4_WORD1_TIME_ACCESS
105 | FATTR4_WORD1_TIME_METADATA
106 | FATTR4_WORD1_TIME_MODIFY
109 const u32 nfs4_statfs_bitmap[2] = {
110 FATTR4_WORD0_FILES_AVAIL
111 | FATTR4_WORD0_FILES_FREE
112 | FATTR4_WORD0_FILES_TOTAL,
113 FATTR4_WORD1_SPACE_AVAIL
114 | FATTR4_WORD1_SPACE_FREE
115 | FATTR4_WORD1_SPACE_TOTAL
118 const u32 nfs4_pathconf_bitmap[2] = {
120 | FATTR4_WORD0_MAXNAME,
124 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
125 | FATTR4_WORD0_MAXREAD
126 | FATTR4_WORD0_MAXWRITE
127 | FATTR4_WORD0_LEASE_TIME,
131 const u32 nfs4_fs_locations_bitmap[2] = {
133 | FATTR4_WORD0_CHANGE
136 | FATTR4_WORD0_FILEID
137 | FATTR4_WORD0_FS_LOCATIONS,
139 | FATTR4_WORD1_NUMLINKS
141 | FATTR4_WORD1_OWNER_GROUP
142 | FATTR4_WORD1_RAWDEV
143 | FATTR4_WORD1_SPACE_USED
144 | FATTR4_WORD1_TIME_ACCESS
145 | FATTR4_WORD1_TIME_METADATA
146 | FATTR4_WORD1_TIME_MODIFY
147 | FATTR4_WORD1_MOUNTED_ON_FILEID
150 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
151 struct nfs4_readdir_arg *readdir)
155 BUG_ON(readdir->count < 80);
157 readdir->cookie = cookie;
158 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
163 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
168 * NFSv4 servers do not return entries for '.' and '..'
169 * Therefore, we fake these entries here. We let '.'
170 * have cookie 0 and '..' have cookie 1. Note that
171 * when talking to the server, we always send cookie 0
174 start = p = kmap_atomic(*readdir->pages, KM_USER0);
177 *p++ = xdr_one; /* next */
178 *p++ = xdr_zero; /* cookie, first word */
179 *p++ = xdr_one; /* cookie, second word */
180 *p++ = xdr_one; /* entry len */
181 memcpy(p, ".\0\0\0", 4); /* entry */
183 *p++ = xdr_one; /* bitmap length */
184 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
185 *p++ = htonl(8); /* attribute buffer length */
186 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
189 *p++ = xdr_one; /* next */
190 *p++ = xdr_zero; /* cookie, first word */
191 *p++ = xdr_two; /* cookie, second word */
192 *p++ = xdr_two; /* entry len */
193 memcpy(p, "..\0\0", 4); /* entry */
195 *p++ = xdr_one; /* bitmap length */
196 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
197 *p++ = htonl(8); /* attribute buffer length */
198 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
200 readdir->pgbase = (char *)p - (char *)start;
201 readdir->count -= readdir->pgbase;
202 kunmap_atomic(start, KM_USER0);
205 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
211 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
212 nfs_wait_bit_killable, TASK_KILLABLE);
216 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
223 *timeout = NFS4_POLL_RETRY_MIN;
224 if (*timeout > NFS4_POLL_RETRY_MAX)
225 *timeout = NFS4_POLL_RETRY_MAX;
226 schedule_timeout_killable(*timeout);
227 if (fatal_signal_pending(current))
233 /* This is the error handling routine for processes that are allowed
236 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
238 struct nfs_client *clp = server->nfs_client;
239 struct nfs4_state *state = exception->state;
242 exception->retry = 0;
246 case -NFS4ERR_ADMIN_REVOKED:
247 case -NFS4ERR_BAD_STATEID:
248 case -NFS4ERR_OPENMODE:
251 nfs4_state_mark_reclaim_nograce(clp, state);
252 goto do_state_recovery;
253 case -NFS4ERR_STALE_STATEID:
256 nfs4_state_mark_reclaim_reboot(clp, state);
257 case -NFS4ERR_STALE_CLIENTID:
258 case -NFS4ERR_EXPIRED:
259 goto do_state_recovery;
260 #if defined(CONFIG_NFS_V4_1)
261 case -NFS4ERR_BADSESSION:
262 case -NFS4ERR_BADSLOT:
263 case -NFS4ERR_BAD_HIGH_SLOT:
264 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
265 case -NFS4ERR_DEADSESSION:
266 case -NFS4ERR_SEQ_FALSE_RETRY:
267 case -NFS4ERR_SEQ_MISORDERED:
268 dprintk("%s ERROR: %d Reset session\n", __func__,
270 nfs4_schedule_state_recovery(clp);
271 exception->retry = 1;
273 #endif /* defined(CONFIG_NFS_V4_1) */
274 case -NFS4ERR_FILE_OPEN:
275 if (exception->timeout > HZ) {
276 /* We have retried a decent amount, time to
285 ret = nfs4_delay(server->client, &exception->timeout);
288 case -NFS4ERR_OLD_STATEID:
289 exception->retry = 1;
291 /* We failed to handle the error */
292 return nfs4_map_errors(ret);
294 nfs4_schedule_state_recovery(clp);
295 ret = nfs4_wait_clnt_recover(clp);
297 exception->retry = 1;
302 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
304 struct nfs_client *clp = server->nfs_client;
305 spin_lock(&clp->cl_lock);
306 if (time_before(clp->cl_last_renewal,timestamp))
307 clp->cl_last_renewal = timestamp;
308 spin_unlock(&clp->cl_lock);
311 #if defined(CONFIG_NFS_V4_1)
314 * nfs4_free_slot - free a slot and efficiently update slot table.
316 * freeing a slot is trivially done by clearing its respective bit
318 * If the freed slotid equals highest_used_slotid we want to update it
319 * so that the server would be able to size down the slot table if needed,
320 * otherwise we know that the highest_used_slotid is still in use.
321 * When updating highest_used_slotid there may be "holes" in the bitmap
322 * so we need to scan down from highest_used_slotid to 0 looking for the now
323 * highest slotid in use.
324 * If none found, highest_used_slotid is set to -1.
326 * Must be called while holding tbl->slot_tbl_lock
329 nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
331 int slotid = free_slotid;
333 /* clear used bit in bitmap */
334 __clear_bit(slotid, tbl->used_slots);
336 /* update highest_used_slotid when it is freed */
337 if (slotid == tbl->highest_used_slotid) {
338 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
339 if (slotid < tbl->max_slots)
340 tbl->highest_used_slotid = slotid;
342 tbl->highest_used_slotid = -1;
344 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
345 free_slotid, tbl->highest_used_slotid);
349 * Signal state manager thread if session is drained
351 static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
353 struct rpc_task *task;
355 if (!test_bit(NFS4CLNT_SESSION_DRAINING, &ses->clp->cl_state)) {
356 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
358 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
362 if (ses->fc_slot_table.highest_used_slotid != -1)
365 dprintk("%s COMPLETE: Session Drained\n", __func__);
366 complete(&ses->complete);
369 static void nfs41_sequence_free_slot(const struct nfs_client *clp,
370 struct nfs4_sequence_res *res)
372 struct nfs4_slot_table *tbl;
374 tbl = &clp->cl_session->fc_slot_table;
375 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
376 /* just wake up the next guy waiting since
377 * we may have not consumed a slot after all */
378 dprintk("%s: No slot\n", __func__);
382 spin_lock(&tbl->slot_tbl_lock);
383 nfs4_free_slot(tbl, res->sr_slotid);
384 nfs41_check_drain_session_complete(clp->cl_session);
385 spin_unlock(&tbl->slot_tbl_lock);
386 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
389 static void nfs41_sequence_done(struct nfs_client *clp,
390 struct nfs4_sequence_res *res,
393 unsigned long timestamp;
394 struct nfs4_slot_table *tbl;
395 struct nfs4_slot *slot;
398 * sr_status remains 1 if an RPC level error occurred. The server
399 * may or may not have processed the sequence operation..
400 * Proceed as if the server received and processed the sequence
403 if (res->sr_status == 1)
404 res->sr_status = NFS_OK;
406 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
407 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
410 /* Check the SEQUENCE operation status */
411 if (res->sr_status == 0) {
412 tbl = &clp->cl_session->fc_slot_table;
413 slot = tbl->slots + res->sr_slotid;
414 /* Update the slot's sequence and clientid lease timer */
416 timestamp = res->sr_renewal_time;
417 spin_lock(&clp->cl_lock);
418 if (time_before(clp->cl_last_renewal, timestamp))
419 clp->cl_last_renewal = timestamp;
420 spin_unlock(&clp->cl_lock);
421 /* Check sequence flags */
422 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
425 /* The session may be reset by one of the error handlers. */
426 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
427 nfs41_sequence_free_slot(clp, res);
431 * nfs4_find_slot - efficiently look for a free slot
433 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
434 * If found, we mark the slot as used, update the highest_used_slotid,
435 * and respectively set up the sequence operation args.
436 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
438 * Note: must be called with under the slot_tbl_lock.
441 nfs4_find_slot(struct nfs4_slot_table *tbl)
444 u8 ret_id = NFS4_MAX_SLOT_TABLE;
445 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
447 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
448 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
450 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
451 if (slotid >= tbl->max_slots)
453 __set_bit(slotid, tbl->used_slots);
454 if (slotid > tbl->highest_used_slotid)
455 tbl->highest_used_slotid = slotid;
458 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
459 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
463 static int nfs41_setup_sequence(struct nfs4_session *session,
464 struct nfs4_sequence_args *args,
465 struct nfs4_sequence_res *res,
467 struct rpc_task *task)
469 struct nfs4_slot *slot;
470 struct nfs4_slot_table *tbl;
473 dprintk("--> %s\n", __func__);
474 /* slot already allocated? */
475 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
478 memset(res, 0, sizeof(*res));
479 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
480 tbl = &session->fc_slot_table;
482 spin_lock(&tbl->slot_tbl_lock);
483 if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state) &&
484 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
486 * The state manager will wait until the slot table is empty.
487 * Schedule the reset thread
489 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
490 spin_unlock(&tbl->slot_tbl_lock);
491 dprintk("%s Schedule Session Reset\n", __func__);
495 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
496 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
497 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
498 spin_unlock(&tbl->slot_tbl_lock);
499 dprintk("%s enforce FIFO order\n", __func__);
503 slotid = nfs4_find_slot(tbl);
504 if (slotid == NFS4_MAX_SLOT_TABLE) {
505 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
506 spin_unlock(&tbl->slot_tbl_lock);
507 dprintk("<-- %s: no free slots\n", __func__);
510 spin_unlock(&tbl->slot_tbl_lock);
512 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
513 slot = tbl->slots + slotid;
514 args->sa_session = session;
515 args->sa_slotid = slotid;
516 args->sa_cache_this = cache_reply;
518 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
520 res->sr_session = session;
521 res->sr_slotid = slotid;
522 res->sr_renewal_time = jiffies;
524 * sr_status is only set in decode_sequence, and so will remain
525 * set to 1 if an rpc level failure occurs.
531 int nfs4_setup_sequence(struct nfs_client *clp,
532 struct nfs4_sequence_args *args,
533 struct nfs4_sequence_res *res,
535 struct rpc_task *task)
539 dprintk("--> %s clp %p session %p sr_slotid %d\n",
540 __func__, clp, clp->cl_session, res->sr_slotid);
542 if (!nfs4_has_session(clp))
544 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
546 if (ret && ret != -EAGAIN) {
547 /* terminate rpc task */
548 task->tk_status = ret;
549 task->tk_action = NULL;
552 dprintk("<-- %s status=%d\n", __func__, ret);
556 struct nfs41_call_sync_data {
557 struct nfs_client *clp;
558 struct nfs4_sequence_args *seq_args;
559 struct nfs4_sequence_res *seq_res;
563 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
565 struct nfs41_call_sync_data *data = calldata;
567 dprintk("--> %s data->clp->cl_session %p\n", __func__,
568 data->clp->cl_session);
569 if (nfs4_setup_sequence(data->clp, data->seq_args,
570 data->seq_res, data->cache_reply, task))
572 rpc_call_start(task);
575 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
577 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
578 nfs41_call_sync_prepare(task, calldata);
581 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
583 struct nfs41_call_sync_data *data = calldata;
585 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
588 struct rpc_call_ops nfs41_call_sync_ops = {
589 .rpc_call_prepare = nfs41_call_sync_prepare,
590 .rpc_call_done = nfs41_call_sync_done,
593 struct rpc_call_ops nfs41_call_priv_sync_ops = {
594 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
595 .rpc_call_done = nfs41_call_sync_done,
598 static int nfs4_call_sync_sequence(struct nfs_client *clp,
599 struct rpc_clnt *clnt,
600 struct rpc_message *msg,
601 struct nfs4_sequence_args *args,
602 struct nfs4_sequence_res *res,
607 struct rpc_task *task;
608 struct nfs41_call_sync_data data = {
612 .cache_reply = cache_reply,
614 struct rpc_task_setup task_setup = {
617 .callback_ops = &nfs41_call_sync_ops,
618 .callback_data = &data
621 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
623 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
624 task = rpc_run_task(&task_setup);
628 ret = task->tk_status;
634 int _nfs4_call_sync_session(struct nfs_server *server,
635 struct rpc_message *msg,
636 struct nfs4_sequence_args *args,
637 struct nfs4_sequence_res *res,
640 return nfs4_call_sync_sequence(server->nfs_client, server->client,
641 msg, args, res, cache_reply, 0);
644 #endif /* CONFIG_NFS_V4_1 */
646 int _nfs4_call_sync(struct nfs_server *server,
647 struct rpc_message *msg,
648 struct nfs4_sequence_args *args,
649 struct nfs4_sequence_res *res,
652 args->sa_session = res->sr_session = NULL;
653 return rpc_call_sync(server->client, msg, 0);
656 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
657 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
658 &(res)->seq_res, (cache_reply))
660 static void nfs4_sequence_done(const struct nfs_server *server,
661 struct nfs4_sequence_res *res, int rpc_status)
663 #ifdef CONFIG_NFS_V4_1
664 if (nfs4_has_session(server->nfs_client))
665 nfs41_sequence_done(server->nfs_client, res, rpc_status);
666 #endif /* CONFIG_NFS_V4_1 */
669 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
671 struct nfs_inode *nfsi = NFS_I(dir);
673 spin_lock(&dir->i_lock);
674 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
675 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
676 nfs_force_lookup_revalidate(dir);
677 nfsi->change_attr = cinfo->after;
678 spin_unlock(&dir->i_lock);
681 struct nfs4_opendata {
683 struct nfs_openargs o_arg;
684 struct nfs_openres o_res;
685 struct nfs_open_confirmargs c_arg;
686 struct nfs_open_confirmres c_res;
687 struct nfs_fattr f_attr;
688 struct nfs_fattr dir_attr;
691 struct nfs4_state_owner *owner;
692 struct nfs4_state *state;
694 unsigned long timestamp;
695 unsigned int rpc_done : 1;
701 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
703 p->o_res.f_attr = &p->f_attr;
704 p->o_res.dir_attr = &p->dir_attr;
705 p->o_res.seqid = p->o_arg.seqid;
706 p->c_res.seqid = p->c_arg.seqid;
707 p->o_res.server = p->o_arg.server;
708 nfs_fattr_init(&p->f_attr);
709 nfs_fattr_init(&p->dir_attr);
710 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
713 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
714 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
715 const struct iattr *attrs)
717 struct dentry *parent = dget_parent(path->dentry);
718 struct inode *dir = parent->d_inode;
719 struct nfs_server *server = NFS_SERVER(dir);
720 struct nfs4_opendata *p;
722 p = kzalloc(sizeof(*p), GFP_KERNEL);
725 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
726 if (p->o_arg.seqid == NULL)
728 p->path.mnt = mntget(path->mnt);
729 p->path.dentry = dget(path->dentry);
732 atomic_inc(&sp->so_count);
733 p->o_arg.fh = NFS_FH(dir);
734 p->o_arg.open_flags = flags;
735 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
736 p->o_arg.clientid = server->nfs_client->cl_clientid;
737 p->o_arg.id = sp->so_owner_id.id;
738 p->o_arg.name = &p->path.dentry->d_name;
739 p->o_arg.server = server;
740 p->o_arg.bitmask = server->attr_bitmask;
741 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
742 if (flags & O_EXCL) {
743 if (nfs4_has_persistent_session(server->nfs_client)) {
745 p->o_arg.u.attrs = &p->attrs;
746 memcpy(&p->attrs, attrs, sizeof(p->attrs));
747 } else { /* EXCLUSIVE4_1 */
748 u32 *s = (u32 *) p->o_arg.u.verifier.data;
752 } else if (flags & O_CREAT) {
753 p->o_arg.u.attrs = &p->attrs;
754 memcpy(&p->attrs, attrs, sizeof(p->attrs));
756 p->c_arg.fh = &p->o_res.fh;
757 p->c_arg.stateid = &p->o_res.stateid;
758 p->c_arg.seqid = p->o_arg.seqid;
759 nfs4_init_opendata_res(p);
769 static void nfs4_opendata_free(struct kref *kref)
771 struct nfs4_opendata *p = container_of(kref,
772 struct nfs4_opendata, kref);
774 nfs_free_seqid(p->o_arg.seqid);
775 if (p->state != NULL)
776 nfs4_put_open_state(p->state);
777 nfs4_put_state_owner(p->owner);
783 static void nfs4_opendata_put(struct nfs4_opendata *p)
786 kref_put(&p->kref, nfs4_opendata_free);
789 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
793 ret = rpc_wait_for_completion_task(task);
797 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
801 if (open_mode & O_EXCL)
803 switch (mode & (FMODE_READ|FMODE_WRITE)) {
805 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
806 && state->n_rdonly != 0;
809 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
810 && state->n_wronly != 0;
812 case FMODE_READ|FMODE_WRITE:
813 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
814 && state->n_rdwr != 0;
820 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
822 if ((delegation->type & fmode) != fmode)
824 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
826 nfs_mark_delegation_referenced(delegation);
830 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
839 case FMODE_READ|FMODE_WRITE:
842 nfs4_state_set_mode_locked(state, state->state | fmode);
845 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
847 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
848 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
849 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
852 set_bit(NFS_O_RDONLY_STATE, &state->flags);
855 set_bit(NFS_O_WRONLY_STATE, &state->flags);
857 case FMODE_READ|FMODE_WRITE:
858 set_bit(NFS_O_RDWR_STATE, &state->flags);
862 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
864 write_seqlock(&state->seqlock);
865 nfs_set_open_stateid_locked(state, stateid, fmode);
866 write_sequnlock(&state->seqlock);
869 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
872 * Protect the call to nfs4_state_set_mode_locked and
873 * serialise the stateid update
875 write_seqlock(&state->seqlock);
876 if (deleg_stateid != NULL) {
877 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
878 set_bit(NFS_DELEGATED_STATE, &state->flags);
880 if (open_stateid != NULL)
881 nfs_set_open_stateid_locked(state, open_stateid, fmode);
882 write_sequnlock(&state->seqlock);
883 spin_lock(&state->owner->so_lock);
884 update_open_stateflags(state, fmode);
885 spin_unlock(&state->owner->so_lock);
888 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
890 struct nfs_inode *nfsi = NFS_I(state->inode);
891 struct nfs_delegation *deleg_cur;
894 fmode &= (FMODE_READ|FMODE_WRITE);
897 deleg_cur = rcu_dereference(nfsi->delegation);
898 if (deleg_cur == NULL)
901 spin_lock(&deleg_cur->lock);
902 if (nfsi->delegation != deleg_cur ||
903 (deleg_cur->type & fmode) != fmode)
904 goto no_delegation_unlock;
906 if (delegation == NULL)
907 delegation = &deleg_cur->stateid;
908 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
909 goto no_delegation_unlock;
911 nfs_mark_delegation_referenced(deleg_cur);
912 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
914 no_delegation_unlock:
915 spin_unlock(&deleg_cur->lock);
919 if (!ret && open_stateid != NULL) {
920 __update_open_stateid(state, open_stateid, NULL, fmode);
928 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
930 struct nfs_delegation *delegation;
933 delegation = rcu_dereference(NFS_I(inode)->delegation);
934 if (delegation == NULL || (delegation->type & fmode) == fmode) {
939 nfs_inode_return_delegation(inode);
942 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
944 struct nfs4_state *state = opendata->state;
945 struct nfs_inode *nfsi = NFS_I(state->inode);
946 struct nfs_delegation *delegation;
947 int open_mode = opendata->o_arg.open_flags & O_EXCL;
948 fmode_t fmode = opendata->o_arg.fmode;
949 nfs4_stateid stateid;
953 if (can_open_cached(state, fmode, open_mode)) {
954 spin_lock(&state->owner->so_lock);
955 if (can_open_cached(state, fmode, open_mode)) {
956 update_open_stateflags(state, fmode);
957 spin_unlock(&state->owner->so_lock);
958 goto out_return_state;
960 spin_unlock(&state->owner->so_lock);
963 delegation = rcu_dereference(nfsi->delegation);
964 if (delegation == NULL ||
965 !can_open_delegated(delegation, fmode)) {
969 /* Save the delegation */
970 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
972 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
977 /* Try to update the stateid using the delegation */
978 if (update_open_stateid(state, NULL, &stateid, fmode))
979 goto out_return_state;
984 atomic_inc(&state->count);
988 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
991 struct nfs4_state *state = NULL;
992 struct nfs_delegation *delegation;
995 if (!data->rpc_done) {
996 state = nfs4_try_open_cached(data);
1001 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1003 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1004 ret = PTR_ERR(inode);
1008 state = nfs4_get_open_state(inode, data->owner);
1011 if (data->o_res.delegation_type != 0) {
1012 int delegation_flags = 0;
1015 delegation = rcu_dereference(NFS_I(inode)->delegation);
1017 delegation_flags = delegation->flags;
1019 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1020 nfs_inode_set_delegation(state->inode,
1021 data->owner->so_cred,
1024 nfs_inode_reclaim_delegation(state->inode,
1025 data->owner->so_cred,
1029 update_open_stateid(state, &data->o_res.stateid, NULL,
1037 return ERR_PTR(ret);
1040 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1042 struct nfs_inode *nfsi = NFS_I(state->inode);
1043 struct nfs_open_context *ctx;
1045 spin_lock(&state->inode->i_lock);
1046 list_for_each_entry(ctx, &nfsi->open_files, list) {
1047 if (ctx->state != state)
1049 get_nfs_open_context(ctx);
1050 spin_unlock(&state->inode->i_lock);
1053 spin_unlock(&state->inode->i_lock);
1054 return ERR_PTR(-ENOENT);
1057 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1059 struct nfs4_opendata *opendata;
1061 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
1062 if (opendata == NULL)
1063 return ERR_PTR(-ENOMEM);
1064 opendata->state = state;
1065 atomic_inc(&state->count);
1069 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1071 struct nfs4_state *newstate;
1074 opendata->o_arg.open_flags = 0;
1075 opendata->o_arg.fmode = fmode;
1076 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1077 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1078 nfs4_init_opendata_res(opendata);
1079 ret = _nfs4_recover_proc_open(opendata);
1082 newstate = nfs4_opendata_to_nfs4_state(opendata);
1083 if (IS_ERR(newstate))
1084 return PTR_ERR(newstate);
1085 nfs4_close_state(&opendata->path, newstate, fmode);
1090 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1092 struct nfs4_state *newstate;
1095 /* memory barrier prior to reading state->n_* */
1096 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1098 if (state->n_rdwr != 0) {
1099 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1102 if (newstate != state)
1105 if (state->n_wronly != 0) {
1106 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1109 if (newstate != state)
1112 if (state->n_rdonly != 0) {
1113 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1116 if (newstate != state)
1120 * We may have performed cached opens for all three recoveries.
1121 * Check if we need to update the current stateid.
1123 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1124 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1125 write_seqlock(&state->seqlock);
1126 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1127 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1128 write_sequnlock(&state->seqlock);
1135 * reclaim state on the server after a reboot.
1137 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1139 struct nfs_delegation *delegation;
1140 struct nfs4_opendata *opendata;
1141 fmode_t delegation_type = 0;
1144 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1145 if (IS_ERR(opendata))
1146 return PTR_ERR(opendata);
1147 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1148 opendata->o_arg.fh = NFS_FH(state->inode);
1150 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1151 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1152 delegation_type = delegation->type;
1154 opendata->o_arg.u.delegation_type = delegation_type;
1155 status = nfs4_open_recover(opendata, state);
1156 nfs4_opendata_put(opendata);
1160 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1162 struct nfs_server *server = NFS_SERVER(state->inode);
1163 struct nfs4_exception exception = { };
1166 err = _nfs4_do_open_reclaim(ctx, state);
1167 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
1169 nfs4_handle_exception(server, err, &exception);
1170 } while (exception.retry);
1174 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1176 struct nfs_open_context *ctx;
1179 ctx = nfs4_state_find_open_context(state);
1181 return PTR_ERR(ctx);
1182 ret = nfs4_do_open_reclaim(ctx, state);
1183 put_nfs_open_context(ctx);
1187 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1189 struct nfs4_opendata *opendata;
1192 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1193 if (IS_ERR(opendata))
1194 return PTR_ERR(opendata);
1195 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1196 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1197 sizeof(opendata->o_arg.u.delegation.data));
1198 ret = nfs4_open_recover(opendata, state);
1199 nfs4_opendata_put(opendata);
1203 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1205 struct nfs4_exception exception = { };
1206 struct nfs_server *server = NFS_SERVER(state->inode);
1209 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1215 case -NFS4ERR_BADSESSION:
1216 case -NFS4ERR_BADSLOT:
1217 case -NFS4ERR_BAD_HIGH_SLOT:
1218 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1219 case -NFS4ERR_DEADSESSION:
1220 nfs4_schedule_state_recovery(
1221 server->nfs_client);
1223 case -NFS4ERR_STALE_CLIENTID:
1224 case -NFS4ERR_STALE_STATEID:
1225 case -NFS4ERR_EXPIRED:
1226 /* Don't recall a delegation if it was lost */
1227 nfs4_schedule_state_recovery(server->nfs_client);
1231 * The show must go on: exit, but mark the
1232 * stateid as needing recovery.
1234 case -NFS4ERR_ADMIN_REVOKED:
1235 case -NFS4ERR_BAD_STATEID:
1236 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1241 err = nfs4_handle_exception(server, err, &exception);
1242 } while (exception.retry);
1247 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1249 struct nfs4_opendata *data = calldata;
1251 data->rpc_status = task->tk_status;
1252 if (RPC_ASSASSINATED(task))
1254 if (data->rpc_status == 0) {
1255 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1256 sizeof(data->o_res.stateid.data));
1257 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1258 renew_lease(data->o_res.server, data->timestamp);
1263 static void nfs4_open_confirm_release(void *calldata)
1265 struct nfs4_opendata *data = calldata;
1266 struct nfs4_state *state = NULL;
1268 /* If this request hasn't been cancelled, do nothing */
1269 if (data->cancelled == 0)
1271 /* In case of error, no cleanup! */
1272 if (!data->rpc_done)
1274 state = nfs4_opendata_to_nfs4_state(data);
1276 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1278 nfs4_opendata_put(data);
1281 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1282 .rpc_call_done = nfs4_open_confirm_done,
1283 .rpc_release = nfs4_open_confirm_release,
1287 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1289 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1291 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1292 struct rpc_task *task;
1293 struct rpc_message msg = {
1294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1295 .rpc_argp = &data->c_arg,
1296 .rpc_resp = &data->c_res,
1297 .rpc_cred = data->owner->so_cred,
1299 struct rpc_task_setup task_setup_data = {
1300 .rpc_client = server->client,
1301 .rpc_message = &msg,
1302 .callback_ops = &nfs4_open_confirm_ops,
1303 .callback_data = data,
1304 .workqueue = nfsiod_workqueue,
1305 .flags = RPC_TASK_ASYNC,
1309 kref_get(&data->kref);
1311 data->rpc_status = 0;
1312 data->timestamp = jiffies;
1313 task = rpc_run_task(&task_setup_data);
1315 return PTR_ERR(task);
1316 status = nfs4_wait_for_completion_rpc_task(task);
1318 data->cancelled = 1;
1321 status = data->rpc_status;
1326 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1328 struct nfs4_opendata *data = calldata;
1329 struct nfs4_state_owner *sp = data->owner;
1331 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1334 * Check if we still need to send an OPEN call, or if we can use
1335 * a delegation instead.
1337 if (data->state != NULL) {
1338 struct nfs_delegation *delegation;
1340 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1343 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1344 if (delegation != NULL &&
1345 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1351 /* Update sequence id. */
1352 data->o_arg.id = sp->so_owner_id.id;
1353 data->o_arg.clientid = sp->so_client->cl_clientid;
1354 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1355 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1356 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1358 data->timestamp = jiffies;
1359 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1360 &data->o_arg.seq_args,
1361 &data->o_res.seq_res, 1, task))
1363 rpc_call_start(task);
1366 task->tk_action = NULL;
1370 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1372 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1373 nfs4_open_prepare(task, calldata);
1376 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1378 struct nfs4_opendata *data = calldata;
1380 data->rpc_status = task->tk_status;
1382 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1385 if (RPC_ASSASSINATED(task))
1387 if (task->tk_status == 0) {
1388 switch (data->o_res.f_attr->mode & S_IFMT) {
1392 data->rpc_status = -ELOOP;
1395 data->rpc_status = -EISDIR;
1398 data->rpc_status = -ENOTDIR;
1400 renew_lease(data->o_res.server, data->timestamp);
1401 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1402 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1407 static void nfs4_open_release(void *calldata)
1409 struct nfs4_opendata *data = calldata;
1410 struct nfs4_state *state = NULL;
1412 /* If this request hasn't been cancelled, do nothing */
1413 if (data->cancelled == 0)
1415 /* In case of error, no cleanup! */
1416 if (data->rpc_status != 0 || !data->rpc_done)
1418 /* In case we need an open_confirm, no cleanup! */
1419 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1421 state = nfs4_opendata_to_nfs4_state(data);
1423 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1425 nfs4_opendata_put(data);
1428 static const struct rpc_call_ops nfs4_open_ops = {
1429 .rpc_call_prepare = nfs4_open_prepare,
1430 .rpc_call_done = nfs4_open_done,
1431 .rpc_release = nfs4_open_release,
1434 static const struct rpc_call_ops nfs4_recover_open_ops = {
1435 .rpc_call_prepare = nfs4_recover_open_prepare,
1436 .rpc_call_done = nfs4_open_done,
1437 .rpc_release = nfs4_open_release,
1440 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1442 struct inode *dir = data->dir->d_inode;
1443 struct nfs_server *server = NFS_SERVER(dir);
1444 struct nfs_openargs *o_arg = &data->o_arg;
1445 struct nfs_openres *o_res = &data->o_res;
1446 struct rpc_task *task;
1447 struct rpc_message msg = {
1448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1451 .rpc_cred = data->owner->so_cred,
1453 struct rpc_task_setup task_setup_data = {
1454 .rpc_client = server->client,
1455 .rpc_message = &msg,
1456 .callback_ops = &nfs4_open_ops,
1457 .callback_data = data,
1458 .workqueue = nfsiod_workqueue,
1459 .flags = RPC_TASK_ASYNC,
1463 kref_get(&data->kref);
1465 data->rpc_status = 0;
1466 data->cancelled = 0;
1468 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1469 task = rpc_run_task(&task_setup_data);
1471 return PTR_ERR(task);
1472 status = nfs4_wait_for_completion_rpc_task(task);
1474 data->cancelled = 1;
1477 status = data->rpc_status;
1483 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1485 struct inode *dir = data->dir->d_inode;
1486 struct nfs_openres *o_res = &data->o_res;
1489 status = nfs4_run_open_task(data, 1);
1490 if (status != 0 || !data->rpc_done)
1493 nfs_refresh_inode(dir, o_res->dir_attr);
1495 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1496 status = _nfs4_proc_open_confirm(data);
1505 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1507 static int _nfs4_proc_open(struct nfs4_opendata *data)
1509 struct inode *dir = data->dir->d_inode;
1510 struct nfs_server *server = NFS_SERVER(dir);
1511 struct nfs_openargs *o_arg = &data->o_arg;
1512 struct nfs_openres *o_res = &data->o_res;
1515 status = nfs4_run_open_task(data, 0);
1516 if (status != 0 || !data->rpc_done)
1519 if (o_arg->open_flags & O_CREAT) {
1520 update_changeattr(dir, &o_res->cinfo);
1521 nfs_post_op_update_inode(dir, o_res->dir_attr);
1523 nfs_refresh_inode(dir, o_res->dir_attr);
1524 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1525 status = _nfs4_proc_open_confirm(data);
1529 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1530 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1534 static int nfs4_recover_expired_lease(struct nfs_server *server)
1536 struct nfs_client *clp = server->nfs_client;
1540 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1541 ret = nfs4_wait_clnt_recover(clp);
1544 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1545 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1547 nfs4_schedule_state_recovery(clp);
1555 * reclaim state on the server after a network partition.
1556 * Assumes caller holds the appropriate lock
1558 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1560 struct nfs4_opendata *opendata;
1563 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1564 if (IS_ERR(opendata))
1565 return PTR_ERR(opendata);
1566 ret = nfs4_open_recover(opendata, state);
1568 d_drop(ctx->path.dentry);
1569 nfs4_opendata_put(opendata);
1573 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1575 struct nfs_server *server = NFS_SERVER(state->inode);
1576 struct nfs4_exception exception = { };
1580 err = _nfs4_open_expired(ctx, state);
1584 case -NFS4ERR_GRACE:
1585 case -NFS4ERR_DELAY:
1587 nfs4_handle_exception(server, err, &exception);
1590 } while (exception.retry);
1595 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1597 struct nfs_open_context *ctx;
1600 ctx = nfs4_state_find_open_context(state);
1602 return PTR_ERR(ctx);
1603 ret = nfs4_do_open_expired(ctx, state);
1604 put_nfs_open_context(ctx);
1609 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1610 * fields corresponding to attributes that were used to store the verifier.
1611 * Make sure we clobber those fields in the later setattr call
1613 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1615 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1616 !(sattr->ia_valid & ATTR_ATIME_SET))
1617 sattr->ia_valid |= ATTR_ATIME;
1619 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1620 !(sattr->ia_valid & ATTR_MTIME_SET))
1621 sattr->ia_valid |= ATTR_MTIME;
1625 * Returns a referenced nfs4_state
1627 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)
1629 struct nfs4_state_owner *sp;
1630 struct nfs4_state *state = NULL;
1631 struct nfs_server *server = NFS_SERVER(dir);
1632 struct nfs4_opendata *opendata;
1635 /* Protect against reboot recovery conflicts */
1637 if (!(sp = nfs4_get_state_owner(server, cred))) {
1638 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1641 status = nfs4_recover_expired_lease(server);
1643 goto err_put_state_owner;
1644 if (path->dentry->d_inode != NULL)
1645 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1647 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1648 if (opendata == NULL)
1649 goto err_put_state_owner;
1651 if (path->dentry->d_inode != NULL)
1652 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1654 status = _nfs4_proc_open(opendata);
1656 goto err_opendata_put;
1658 if (opendata->o_arg.open_flags & O_EXCL)
1659 nfs4_exclusive_attrset(opendata, sattr);
1661 state = nfs4_opendata_to_nfs4_state(opendata);
1662 status = PTR_ERR(state);
1664 goto err_opendata_put;
1665 if ((opendata->o_res.rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) != 0)
1666 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1667 nfs4_opendata_put(opendata);
1668 nfs4_put_state_owner(sp);
1672 nfs4_opendata_put(opendata);
1673 err_put_state_owner:
1674 nfs4_put_state_owner(sp);
1681 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)
1683 struct nfs4_exception exception = { };
1684 struct nfs4_state *res;
1688 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1691 /* NOTE: BAD_SEQID means the server and client disagree about the
1692 * book-keeping w.r.t. state-changing operations
1693 * (OPEN/CLOSE/LOCK/LOCKU...)
1694 * It is actually a sign of a bug on the client or on the server.
1696 * If we receive a BAD_SEQID error in the particular case of
1697 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1698 * have unhashed the old state_owner for us, and that we can
1699 * therefore safely retry using a new one. We should still warn
1700 * the user though...
1702 if (status == -NFS4ERR_BAD_SEQID) {
1703 printk(KERN_WARNING "NFS: v4 server %s "
1704 " returned a bad sequence-id error!\n",
1705 NFS_SERVER(dir)->nfs_client->cl_hostname);
1706 exception.retry = 1;
1710 * BAD_STATEID on OPEN means that the server cancelled our
1711 * state before it received the OPEN_CONFIRM.
1712 * Recover by retrying the request as per the discussion
1713 * on Page 181 of RFC3530.
1715 if (status == -NFS4ERR_BAD_STATEID) {
1716 exception.retry = 1;
1719 if (status == -EAGAIN) {
1720 /* We must have found a delegation */
1721 exception.retry = 1;
1724 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1725 status, &exception));
1726 } while (exception.retry);
1730 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1731 struct nfs_fattr *fattr, struct iattr *sattr,
1732 struct nfs4_state *state)
1734 struct nfs_server *server = NFS_SERVER(inode);
1735 struct nfs_setattrargs arg = {
1736 .fh = NFS_FH(inode),
1739 .bitmask = server->attr_bitmask,
1741 struct nfs_setattrres res = {
1745 struct rpc_message msg = {
1746 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1751 unsigned long timestamp = jiffies;
1754 nfs_fattr_init(fattr);
1756 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1757 /* Use that stateid */
1758 } else if (state != NULL) {
1759 nfs4_copy_stateid(&arg.stateid, state, current->files);
1761 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1763 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1764 if (status == 0 && state != NULL)
1765 renew_lease(server, timestamp);
1769 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1770 struct nfs_fattr *fattr, struct iattr *sattr,
1771 struct nfs4_state *state)
1773 struct nfs_server *server = NFS_SERVER(inode);
1774 struct nfs4_exception exception = { };
1777 err = nfs4_handle_exception(server,
1778 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1780 } while (exception.retry);
1784 struct nfs4_closedata {
1786 struct inode *inode;
1787 struct nfs4_state *state;
1788 struct nfs_closeargs arg;
1789 struct nfs_closeres res;
1790 struct nfs_fattr fattr;
1791 unsigned long timestamp;
1794 static void nfs4_free_closedata(void *data)
1796 struct nfs4_closedata *calldata = data;
1797 struct nfs4_state_owner *sp = calldata->state->owner;
1799 nfs4_put_open_state(calldata->state);
1800 nfs_free_seqid(calldata->arg.seqid);
1801 nfs4_put_state_owner(sp);
1802 path_put(&calldata->path);
1806 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1809 spin_lock(&state->owner->so_lock);
1810 if (!(fmode & FMODE_READ))
1811 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1812 if (!(fmode & FMODE_WRITE))
1813 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1814 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1815 spin_unlock(&state->owner->so_lock);
1818 static void nfs4_close_done(struct rpc_task *task, void *data)
1820 struct nfs4_closedata *calldata = data;
1821 struct nfs4_state *state = calldata->state;
1822 struct nfs_server *server = NFS_SERVER(calldata->inode);
1824 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
1825 if (RPC_ASSASSINATED(task))
1827 /* hmm. we are done with the inode, and in the process of freeing
1828 * the state_owner. we keep this around to process errors
1830 switch (task->tk_status) {
1832 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1833 renew_lease(server, calldata->timestamp);
1834 nfs4_close_clear_stateid_flags(state,
1835 calldata->arg.fmode);
1837 case -NFS4ERR_STALE_STATEID:
1838 case -NFS4ERR_OLD_STATEID:
1839 case -NFS4ERR_BAD_STATEID:
1840 case -NFS4ERR_EXPIRED:
1841 if (calldata->arg.fmode == 0)
1844 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1845 rpc_restart_call_prepare(task);
1847 nfs_release_seqid(calldata->arg.seqid);
1848 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1851 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1853 struct nfs4_closedata *calldata = data;
1854 struct nfs4_state *state = calldata->state;
1857 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1860 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1861 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
1862 spin_lock(&state->owner->so_lock);
1863 /* Calculate the change in open mode */
1864 if (state->n_rdwr == 0) {
1865 if (state->n_rdonly == 0) {
1866 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1867 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1868 calldata->arg.fmode &= ~FMODE_READ;
1870 if (state->n_wronly == 0) {
1871 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1872 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1873 calldata->arg.fmode &= ~FMODE_WRITE;
1876 spin_unlock(&state->owner->so_lock);
1879 /* Note: exit _without_ calling nfs4_close_done */
1880 task->tk_action = NULL;
1884 if (calldata->arg.fmode == 0)
1885 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1887 nfs_fattr_init(calldata->res.fattr);
1888 calldata->timestamp = jiffies;
1889 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1890 &calldata->arg.seq_args, &calldata->res.seq_res,
1893 rpc_call_start(task);
1896 static const struct rpc_call_ops nfs4_close_ops = {
1897 .rpc_call_prepare = nfs4_close_prepare,
1898 .rpc_call_done = nfs4_close_done,
1899 .rpc_release = nfs4_free_closedata,
1903 * It is possible for data to be read/written from a mem-mapped file
1904 * after the sys_close call (which hits the vfs layer as a flush).
1905 * This means that we can't safely call nfsv4 close on a file until
1906 * the inode is cleared. This in turn means that we are not good
1907 * NFSv4 citizens - we do not indicate to the server to update the file's
1908 * share state even when we are done with one of the three share
1909 * stateid's in the inode.
1911 * NOTE: Caller must be holding the sp->so_owner semaphore!
1913 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1915 struct nfs_server *server = NFS_SERVER(state->inode);
1916 struct nfs4_closedata *calldata;
1917 struct nfs4_state_owner *sp = state->owner;
1918 struct rpc_task *task;
1919 struct rpc_message msg = {
1920 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1921 .rpc_cred = state->owner->so_cred,
1923 struct rpc_task_setup task_setup_data = {
1924 .rpc_client = server->client,
1925 .rpc_message = &msg,
1926 .callback_ops = &nfs4_close_ops,
1927 .workqueue = nfsiod_workqueue,
1928 .flags = RPC_TASK_ASYNC,
1930 int status = -ENOMEM;
1932 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1933 if (calldata == NULL)
1935 calldata->inode = state->inode;
1936 calldata->state = state;
1937 calldata->arg.fh = NFS_FH(state->inode);
1938 calldata->arg.stateid = &state->open_stateid;
1939 /* Serialization for the sequence id */
1940 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1941 if (calldata->arg.seqid == NULL)
1942 goto out_free_calldata;
1943 calldata->arg.fmode = 0;
1944 calldata->arg.bitmask = server->cache_consistency_bitmask;
1945 calldata->res.fattr = &calldata->fattr;
1946 calldata->res.seqid = calldata->arg.seqid;
1947 calldata->res.server = server;
1948 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
1949 calldata->path.mnt = mntget(path->mnt);
1950 calldata->path.dentry = dget(path->dentry);
1952 msg.rpc_argp = &calldata->arg,
1953 msg.rpc_resp = &calldata->res,
1954 task_setup_data.callback_data = calldata;
1955 task = rpc_run_task(&task_setup_data);
1957 return PTR_ERR(task);
1960 status = rpc_wait_for_completion_task(task);
1966 nfs4_put_open_state(state);
1967 nfs4_put_state_owner(sp);
1971 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1976 /* If the open_intent is for execute, we have an extra check to make */
1977 if (fmode & FMODE_EXEC) {
1978 ret = nfs_may_open(state->inode,
1979 state->owner->so_cred,
1980 nd->intent.open.flags);
1984 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1985 if (!IS_ERR(filp)) {
1986 struct nfs_open_context *ctx;
1987 ctx = nfs_file_open_context(filp);
1991 ret = PTR_ERR(filp);
1993 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1998 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
2000 struct path path = {
2001 .mnt = nd->path.mnt,
2004 struct dentry *parent;
2006 struct rpc_cred *cred;
2007 struct nfs4_state *state;
2009 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
2011 if (nd->flags & LOOKUP_CREATE) {
2012 attr.ia_mode = nd->intent.open.create_mode;
2013 attr.ia_valid = ATTR_MODE;
2014 if (!IS_POSIXACL(dir))
2015 attr.ia_mode &= ~current_umask();
2018 BUG_ON(nd->intent.open.flags & O_CREAT);
2021 cred = rpc_lookup_cred();
2023 return (struct dentry *)cred;
2024 parent = dentry->d_parent;
2025 /* Protect against concurrent sillydeletes */
2026 nfs_block_sillyrename(parent);
2027 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
2029 if (IS_ERR(state)) {
2030 if (PTR_ERR(state) == -ENOENT) {
2031 d_add(dentry, NULL);
2032 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2034 nfs_unblock_sillyrename(parent);
2035 return (struct dentry *)state;
2037 res = d_add_unique(dentry, igrab(state->inode));
2040 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
2041 nfs_unblock_sillyrename(parent);
2042 nfs4_intent_set_file(nd, &path, state, fmode);
2047 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
2049 struct path path = {
2050 .mnt = nd->path.mnt,
2053 struct rpc_cred *cred;
2054 struct nfs4_state *state;
2055 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
2057 cred = rpc_lookup_cred();
2059 return PTR_ERR(cred);
2060 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
2062 if (IS_ERR(state)) {
2063 switch (PTR_ERR(state)) {
2069 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
2075 if (state->inode == dentry->d_inode) {
2076 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2077 nfs4_intent_set_file(nd, &path, state, fmode);
2080 nfs4_close_sync(&path, state, fmode);
2086 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2088 if (ctx->state == NULL)
2091 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2093 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2096 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2098 struct nfs4_server_caps_arg args = {
2101 struct nfs4_server_caps_res res = {};
2102 struct rpc_message msg = {
2103 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2109 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2111 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2112 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2113 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2114 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2115 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2116 NFS_CAP_CTIME|NFS_CAP_MTIME);
2117 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2118 server->caps |= NFS_CAP_ACLS;
2119 if (res.has_links != 0)
2120 server->caps |= NFS_CAP_HARDLINKS;
2121 if (res.has_symlinks != 0)
2122 server->caps |= NFS_CAP_SYMLINKS;
2123 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2124 server->caps |= NFS_CAP_FILEID;
2125 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2126 server->caps |= NFS_CAP_MODE;
2127 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2128 server->caps |= NFS_CAP_NLINK;
2129 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2130 server->caps |= NFS_CAP_OWNER;
2131 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2132 server->caps |= NFS_CAP_OWNER_GROUP;
2133 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2134 server->caps |= NFS_CAP_ATIME;
2135 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2136 server->caps |= NFS_CAP_CTIME;
2137 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2138 server->caps |= NFS_CAP_MTIME;
2140 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2141 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2142 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2143 server->acl_bitmask = res.acl_bitmask;
2149 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2151 struct nfs4_exception exception = { };
2154 err = nfs4_handle_exception(server,
2155 _nfs4_server_capabilities(server, fhandle),
2157 } while (exception.retry);
2161 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2162 struct nfs_fsinfo *info)
2164 struct nfs4_lookup_root_arg args = {
2165 .bitmask = nfs4_fattr_bitmap,
2167 struct nfs4_lookup_res res = {
2169 .fattr = info->fattr,
2172 struct rpc_message msg = {
2173 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2178 nfs_fattr_init(info->fattr);
2179 return nfs4_call_sync(server, &msg, &args, &res, 0);
2182 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2183 struct nfs_fsinfo *info)
2185 struct nfs4_exception exception = { };
2188 err = nfs4_handle_exception(server,
2189 _nfs4_lookup_root(server, fhandle, info),
2191 } while (exception.retry);
2196 * get the file handle for the "/" directory on the server
2198 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2199 struct nfs_fsinfo *info)
2203 status = nfs4_lookup_root(server, fhandle, info);
2205 status = nfs4_server_capabilities(server, fhandle);
2207 status = nfs4_do_fsinfo(server, fhandle, info);
2208 return nfs4_map_errors(status);
2212 * Get locations and (maybe) other attributes of a referral.
2213 * Note that we'll actually follow the referral later when
2214 * we detect fsid mismatch in inode revalidation
2216 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2218 int status = -ENOMEM;
2219 struct page *page = NULL;
2220 struct nfs4_fs_locations *locations = NULL;
2222 page = alloc_page(GFP_KERNEL);
2225 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2226 if (locations == NULL)
2229 status = nfs4_proc_fs_locations(dir, name, locations, page);
2232 /* Make sure server returned a different fsid for the referral */
2233 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2234 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2239 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2240 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2242 fattr->mode = S_IFDIR;
2243 memset(fhandle, 0, sizeof(struct nfs_fh));
2252 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2254 struct nfs4_getattr_arg args = {
2256 .bitmask = server->attr_bitmask,
2258 struct nfs4_getattr_res res = {
2262 struct rpc_message msg = {
2263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2268 nfs_fattr_init(fattr);
2269 return nfs4_call_sync(server, &msg, &args, &res, 0);
2272 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2274 struct nfs4_exception exception = { };
2277 err = nfs4_handle_exception(server,
2278 _nfs4_proc_getattr(server, fhandle, fattr),
2280 } while (exception.retry);
2285 * The file is not closed if it is opened due to the a request to change
2286 * the size of the file. The open call will not be needed once the
2287 * VFS layer lookup-intents are implemented.
2289 * Close is called when the inode is destroyed.
2290 * If we haven't opened the file for O_WRONLY, we
2291 * need to in the size_change case to obtain a stateid.
2294 * Because OPEN is always done by name in nfsv4, it is
2295 * possible that we opened a different file by the same
2296 * name. We can recognize this race condition, but we
2297 * can't do anything about it besides returning an error.
2299 * This will be fixed with VFS changes (lookup-intent).
2302 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2303 struct iattr *sattr)
2305 struct inode *inode = dentry->d_inode;
2306 struct rpc_cred *cred = NULL;
2307 struct nfs4_state *state = NULL;
2310 nfs_fattr_init(fattr);
2312 /* Search for an existing open(O_WRITE) file */
2313 if (sattr->ia_valid & ATTR_FILE) {
2314 struct nfs_open_context *ctx;
2316 ctx = nfs_file_open_context(sattr->ia_file);
2323 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2325 nfs_setattr_update_inode(inode, sattr);
2329 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2330 const struct qstr *name, struct nfs_fh *fhandle,
2331 struct nfs_fattr *fattr)
2334 struct nfs4_lookup_arg args = {
2335 .bitmask = server->attr_bitmask,
2339 struct nfs4_lookup_res res = {
2344 struct rpc_message msg = {
2345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2350 nfs_fattr_init(fattr);
2352 dprintk("NFS call lookupfh %s\n", name->name);
2353 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2354 dprintk("NFS reply lookupfh: %d\n", status);
2358 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2359 struct qstr *name, struct nfs_fh *fhandle,
2360 struct nfs_fattr *fattr)
2362 struct nfs4_exception exception = { };
2365 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2367 if (err == -NFS4ERR_MOVED) {
2371 err = nfs4_handle_exception(server, err, &exception);
2372 } while (exception.retry);
2376 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2377 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2381 dprintk("NFS call lookup %s\n", name->name);
2382 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2383 if (status == -NFS4ERR_MOVED)
2384 status = nfs4_get_referral(dir, name, fattr, fhandle);
2385 dprintk("NFS reply lookup: %d\n", status);
2389 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2391 struct nfs4_exception exception = { };
2394 err = nfs4_handle_exception(NFS_SERVER(dir),
2395 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2397 } while (exception.retry);
2401 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2403 struct nfs_server *server = NFS_SERVER(inode);
2404 struct nfs_fattr fattr;
2405 struct nfs4_accessargs args = {
2406 .fh = NFS_FH(inode),
2407 .bitmask = server->attr_bitmask,
2409 struct nfs4_accessres res = {
2413 struct rpc_message msg = {
2414 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2417 .rpc_cred = entry->cred,
2419 int mode = entry->mask;
2423 * Determine which access bits we want to ask for...
2425 if (mode & MAY_READ)
2426 args.access |= NFS4_ACCESS_READ;
2427 if (S_ISDIR(inode->i_mode)) {
2428 if (mode & MAY_WRITE)
2429 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2430 if (mode & MAY_EXEC)
2431 args.access |= NFS4_ACCESS_LOOKUP;
2433 if (mode & MAY_WRITE)
2434 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2435 if (mode & MAY_EXEC)
2436 args.access |= NFS4_ACCESS_EXECUTE;
2438 nfs_fattr_init(&fattr);
2439 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2442 if (res.access & NFS4_ACCESS_READ)
2443 entry->mask |= MAY_READ;
2444 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2445 entry->mask |= MAY_WRITE;
2446 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2447 entry->mask |= MAY_EXEC;
2448 nfs_refresh_inode(inode, &fattr);
2453 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2455 struct nfs4_exception exception = { };
2458 err = nfs4_handle_exception(NFS_SERVER(inode),
2459 _nfs4_proc_access(inode, entry),
2461 } while (exception.retry);
2466 * TODO: For the time being, we don't try to get any attributes
2467 * along with any of the zero-copy operations READ, READDIR,
2470 * In the case of the first three, we want to put the GETATTR
2471 * after the read-type operation -- this is because it is hard
2472 * to predict the length of a GETATTR response in v4, and thus
2473 * align the READ data correctly. This means that the GETATTR
2474 * may end up partially falling into the page cache, and we should
2475 * shift it into the 'tail' of the xdr_buf before processing.
2476 * To do this efficiently, we need to know the total length
2477 * of data received, which doesn't seem to be available outside
2480 * In the case of WRITE, we also want to put the GETATTR after
2481 * the operation -- in this case because we want to make sure
2482 * we get the post-operation mtime and size. This means that
2483 * we can't use xdr_encode_pages() as written: we need a variant
2484 * of it which would leave room in the 'tail' iovec.
2486 * Both of these changes to the XDR layer would in fact be quite
2487 * minor, but I decided to leave them for a subsequent patch.
2489 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2490 unsigned int pgbase, unsigned int pglen)
2492 struct nfs4_readlink args = {
2493 .fh = NFS_FH(inode),
2498 struct nfs4_readlink_res res;
2499 struct rpc_message msg = {
2500 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2505 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2508 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2509 unsigned int pgbase, unsigned int pglen)
2511 struct nfs4_exception exception = { };
2514 err = nfs4_handle_exception(NFS_SERVER(inode),
2515 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2517 } while (exception.retry);
2523 * We will need to arrange for the VFS layer to provide an atomic open.
2524 * Until then, this create/open method is prone to inefficiency and race
2525 * conditions due to the lookup, create, and open VFS calls from sys_open()
2526 * placed on the wire.
2528 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2529 * The file will be opened again in the subsequent VFS open call
2530 * (nfs4_proc_file_open).
2532 * The open for read will just hang around to be used by any process that
2533 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2537 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2538 int flags, struct nameidata *nd)
2540 struct path path = {
2541 .mnt = nd->path.mnt,
2544 struct nfs4_state *state;
2545 struct rpc_cred *cred;
2546 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2549 cred = rpc_lookup_cred();
2551 status = PTR_ERR(cred);
2554 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2556 if (IS_ERR(state)) {
2557 status = PTR_ERR(state);
2560 d_add(dentry, igrab(state->inode));
2561 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2562 if (flags & O_EXCL) {
2563 struct nfs_fattr fattr;
2564 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2566 nfs_setattr_update_inode(state->inode, sattr);
2567 nfs_post_op_update_inode(state->inode, &fattr);
2569 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2570 status = nfs4_intent_set_file(nd, &path, state, fmode);
2572 nfs4_close_sync(&path, state, fmode);
2579 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2581 struct nfs_server *server = NFS_SERVER(dir);
2582 struct nfs_removeargs args = {
2584 .name.len = name->len,
2585 .name.name = name->name,
2586 .bitmask = server->attr_bitmask,
2588 struct nfs_removeres res = {
2591 struct rpc_message msg = {
2592 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2598 nfs_fattr_init(&res.dir_attr);
2599 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2601 update_changeattr(dir, &res.cinfo);
2602 nfs_post_op_update_inode(dir, &res.dir_attr);
2607 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2609 struct nfs4_exception exception = { };
2612 err = nfs4_handle_exception(NFS_SERVER(dir),
2613 _nfs4_proc_remove(dir, name),
2615 } while (exception.retry);
2619 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2621 struct nfs_server *server = NFS_SERVER(dir);
2622 struct nfs_removeargs *args = msg->rpc_argp;
2623 struct nfs_removeres *res = msg->rpc_resp;
2625 args->bitmask = server->cache_consistency_bitmask;
2626 res->server = server;
2627 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2630 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2632 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2634 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
2635 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2637 update_changeattr(dir, &res->cinfo);
2638 nfs_post_op_update_inode(dir, &res->dir_attr);
2642 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2643 struct inode *new_dir, struct qstr *new_name)
2645 struct nfs_server *server = NFS_SERVER(old_dir);
2646 struct nfs4_rename_arg arg = {
2647 .old_dir = NFS_FH(old_dir),
2648 .new_dir = NFS_FH(new_dir),
2649 .old_name = old_name,
2650 .new_name = new_name,
2651 .bitmask = server->attr_bitmask,
2653 struct nfs_fattr old_fattr, new_fattr;
2654 struct nfs4_rename_res res = {
2656 .old_fattr = &old_fattr,
2657 .new_fattr = &new_fattr,
2659 struct rpc_message msg = {
2660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2666 nfs_fattr_init(res.old_fattr);
2667 nfs_fattr_init(res.new_fattr);
2668 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2671 update_changeattr(old_dir, &res.old_cinfo);
2672 nfs_post_op_update_inode(old_dir, res.old_fattr);
2673 update_changeattr(new_dir, &res.new_cinfo);
2674 nfs_post_op_update_inode(new_dir, res.new_fattr);
2679 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2680 struct inode *new_dir, struct qstr *new_name)
2682 struct nfs4_exception exception = { };
2685 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2686 _nfs4_proc_rename(old_dir, old_name,
2689 } while (exception.retry);
2693 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2695 struct nfs_server *server = NFS_SERVER(inode);
2696 struct nfs4_link_arg arg = {
2697 .fh = NFS_FH(inode),
2698 .dir_fh = NFS_FH(dir),
2700 .bitmask = server->attr_bitmask,
2702 struct nfs_fattr fattr, dir_attr;
2703 struct nfs4_link_res res = {
2706 .dir_attr = &dir_attr,
2708 struct rpc_message msg = {
2709 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2715 nfs_fattr_init(res.fattr);
2716 nfs_fattr_init(res.dir_attr);
2717 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2719 update_changeattr(dir, &res.cinfo);
2720 nfs_post_op_update_inode(dir, res.dir_attr);
2721 nfs_post_op_update_inode(inode, res.fattr);
2727 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2729 struct nfs4_exception exception = { };
2732 err = nfs4_handle_exception(NFS_SERVER(inode),
2733 _nfs4_proc_link(inode, dir, name),
2735 } while (exception.retry);
2739 struct nfs4_createdata {
2740 struct rpc_message msg;
2741 struct nfs4_create_arg arg;
2742 struct nfs4_create_res res;
2744 struct nfs_fattr fattr;
2745 struct nfs_fattr dir_fattr;
2748 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2749 struct qstr *name, struct iattr *sattr, u32 ftype)
2751 struct nfs4_createdata *data;
2753 data = kzalloc(sizeof(*data), GFP_KERNEL);
2755 struct nfs_server *server = NFS_SERVER(dir);
2757 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2758 data->msg.rpc_argp = &data->arg;
2759 data->msg.rpc_resp = &data->res;
2760 data->arg.dir_fh = NFS_FH(dir);
2761 data->arg.server = server;
2762 data->arg.name = name;
2763 data->arg.attrs = sattr;
2764 data->arg.ftype = ftype;
2765 data->arg.bitmask = server->attr_bitmask;
2766 data->res.server = server;
2767 data->res.fh = &data->fh;
2768 data->res.fattr = &data->fattr;
2769 data->res.dir_fattr = &data->dir_fattr;
2770 nfs_fattr_init(data->res.fattr);
2771 nfs_fattr_init(data->res.dir_fattr);
2776 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2778 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2779 &data->arg, &data->res, 1);
2781 update_changeattr(dir, &data->res.dir_cinfo);
2782 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2783 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2788 static void nfs4_free_createdata(struct nfs4_createdata *data)
2793 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2794 struct page *page, unsigned int len, struct iattr *sattr)
2796 struct nfs4_createdata *data;
2797 int status = -ENAMETOOLONG;
2799 if (len > NFS4_MAXPATHLEN)
2803 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2807 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2808 data->arg.u.symlink.pages = &page;
2809 data->arg.u.symlink.len = len;
2811 status = nfs4_do_create(dir, dentry, data);
2813 nfs4_free_createdata(data);
2818 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2819 struct page *page, unsigned int len, struct iattr *sattr)
2821 struct nfs4_exception exception = { };
2824 err = nfs4_handle_exception(NFS_SERVER(dir),
2825 _nfs4_proc_symlink(dir, dentry, page,
2828 } while (exception.retry);
2832 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2833 struct iattr *sattr)
2835 struct nfs4_createdata *data;
2836 int status = -ENOMEM;
2838 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2842 status = nfs4_do_create(dir, dentry, data);
2844 nfs4_free_createdata(data);
2849 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2850 struct iattr *sattr)
2852 struct nfs4_exception exception = { };
2855 err = nfs4_handle_exception(NFS_SERVER(dir),
2856 _nfs4_proc_mkdir(dir, dentry, sattr),
2858 } while (exception.retry);
2862 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2863 u64 cookie, struct page *page, unsigned int count, int plus)
2865 struct inode *dir = dentry->d_inode;
2866 struct nfs4_readdir_arg args = {
2871 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2873 struct nfs4_readdir_res res;
2874 struct rpc_message msg = {
2875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2882 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2883 dentry->d_parent->d_name.name,
2884 dentry->d_name.name,
2885 (unsigned long long)cookie);
2886 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2887 res.pgbase = args.pgbase;
2888 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2890 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2892 nfs_invalidate_atime(dir);
2894 dprintk("%s: returns %d\n", __func__, status);
2898 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2899 u64 cookie, struct page *page, unsigned int count, int plus)
2901 struct nfs4_exception exception = { };
2904 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2905 _nfs4_proc_readdir(dentry, cred, cookie,
2908 } while (exception.retry);
2912 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2913 struct iattr *sattr, dev_t rdev)
2915 struct nfs4_createdata *data;
2916 int mode = sattr->ia_mode;
2917 int status = -ENOMEM;
2919 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2920 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2922 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2927 data->arg.ftype = NF4FIFO;
2928 else if (S_ISBLK(mode)) {
2929 data->arg.ftype = NF4BLK;
2930 data->arg.u.device.specdata1 = MAJOR(rdev);
2931 data->arg.u.device.specdata2 = MINOR(rdev);
2933 else if (S_ISCHR(mode)) {
2934 data->arg.ftype = NF4CHR;
2935 data->arg.u.device.specdata1 = MAJOR(rdev);
2936 data->arg.u.device.specdata2 = MINOR(rdev);
2939 status = nfs4_do_create(dir, dentry, data);
2941 nfs4_free_createdata(data);
2946 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2947 struct iattr *sattr, dev_t rdev)
2949 struct nfs4_exception exception = { };
2952 err = nfs4_handle_exception(NFS_SERVER(dir),
2953 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2955 } while (exception.retry);
2959 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2960 struct nfs_fsstat *fsstat)
2962 struct nfs4_statfs_arg args = {
2964 .bitmask = server->attr_bitmask,
2966 struct nfs4_statfs_res res = {
2969 struct rpc_message msg = {
2970 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2975 nfs_fattr_init(fsstat->fattr);
2976 return nfs4_call_sync(server, &msg, &args, &res, 0);
2979 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2981 struct nfs4_exception exception = { };
2984 err = nfs4_handle_exception(server,
2985 _nfs4_proc_statfs(server, fhandle, fsstat),
2987 } while (exception.retry);
2991 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2992 struct nfs_fsinfo *fsinfo)
2994 struct nfs4_fsinfo_arg args = {
2996 .bitmask = server->attr_bitmask,
2998 struct nfs4_fsinfo_res res = {
3001 struct rpc_message msg = {
3002 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3007 return nfs4_call_sync(server, &msg, &args, &res, 0);
3010 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3012 struct nfs4_exception exception = { };
3016 err = nfs4_handle_exception(server,
3017 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3019 } while (exception.retry);
3023 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3025 nfs_fattr_init(fsinfo->fattr);
3026 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3029 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3030 struct nfs_pathconf *pathconf)
3032 struct nfs4_pathconf_arg args = {
3034 .bitmask = server->attr_bitmask,
3036 struct nfs4_pathconf_res res = {
3037 .pathconf = pathconf,
3039 struct rpc_message msg = {
3040 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3045 /* None of the pathconf attributes are mandatory to implement */
3046 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3047 memset(pathconf, 0, sizeof(*pathconf));
3051 nfs_fattr_init(pathconf->fattr);
3052 return nfs4_call_sync(server, &msg, &args, &res, 0);
3055 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3056 struct nfs_pathconf *pathconf)
3058 struct nfs4_exception exception = { };
3062 err = nfs4_handle_exception(server,
3063 _nfs4_proc_pathconf(server, fhandle, pathconf),
3065 } while (exception.retry);
3069 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3071 struct nfs_server *server = NFS_SERVER(data->inode);
3073 dprintk("--> %s\n", __func__);
3075 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
3077 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3078 nfs_restart_rpc(task, server->nfs_client);
3082 nfs_invalidate_atime(data->inode);
3083 if (task->tk_status > 0)
3084 renew_lease(server, data->timestamp);
3088 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3090 data->timestamp = jiffies;
3091 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3094 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3096 struct inode *inode = data->inode;
3098 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3101 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3102 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3105 if (task->tk_status >= 0) {
3106 renew_lease(NFS_SERVER(inode), data->timestamp);
3107 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3112 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3114 struct nfs_server *server = NFS_SERVER(data->inode);
3116 data->args.bitmask = server->cache_consistency_bitmask;
3117 data->res.server = server;
3118 data->timestamp = jiffies;
3120 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3123 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3125 struct inode *inode = data->inode;
3127 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3129 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3130 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3133 nfs_refresh_inode(inode, data->res.fattr);
3137 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3139 struct nfs_server *server = NFS_SERVER(data->inode);
3141 data->args.bitmask = server->cache_consistency_bitmask;
3142 data->res.server = server;
3143 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3147 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3148 * standalone procedure for queueing an asynchronous RENEW.
3150 static void nfs4_renew_done(struct rpc_task *task, void *data)
3152 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
3153 unsigned long timestamp = (unsigned long)data;
3155 if (task->tk_status < 0) {
3156 /* Unless we're shutting down, schedule state recovery! */
3157 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3158 nfs4_schedule_state_recovery(clp);
3161 spin_lock(&clp->cl_lock);
3162 if (time_before(clp->cl_last_renewal,timestamp))
3163 clp->cl_last_renewal = timestamp;
3164 spin_unlock(&clp->cl_lock);
3167 static const struct rpc_call_ops nfs4_renew_ops = {
3168 .rpc_call_done = nfs4_renew_done,
3171 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3173 struct rpc_message msg = {
3174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3179 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3180 &nfs4_renew_ops, (void *)jiffies);
3183 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3185 struct rpc_message msg = {
3186 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3190 unsigned long now = jiffies;
3193 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3196 spin_lock(&clp->cl_lock);
3197 if (time_before(clp->cl_last_renewal,now))
3198 clp->cl_last_renewal = now;
3199 spin_unlock(&clp->cl_lock);
3203 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3205 return (server->caps & NFS_CAP_ACLS)
3206 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3207 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3210 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3211 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3214 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3216 static void buf_to_pages(const void *buf, size_t buflen,
3217 struct page **pages, unsigned int *pgbase)
3219 const void *p = buf;
3221 *pgbase = offset_in_page(buf);
3223 while (p < buf + buflen) {
3224 *(pages++) = virt_to_page(p);
3225 p += PAGE_CACHE_SIZE;
3229 struct nfs4_cached_acl {
3235 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3237 struct nfs_inode *nfsi = NFS_I(inode);
3239 spin_lock(&inode->i_lock);
3240 kfree(nfsi->nfs4_acl);
3241 nfsi->nfs4_acl = acl;
3242 spin_unlock(&inode->i_lock);
3245 static void nfs4_zap_acl_attr(struct inode *inode)
3247 nfs4_set_cached_acl(inode, NULL);
3250 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3252 struct nfs_inode *nfsi = NFS_I(inode);
3253 struct nfs4_cached_acl *acl;
3256 spin_lock(&inode->i_lock);
3257 acl = nfsi->nfs4_acl;
3260 if (buf == NULL) /* user is just asking for length */
3262 if (acl->cached == 0)
3264 ret = -ERANGE; /* see getxattr(2) man page */
3265 if (acl->len > buflen)
3267 memcpy(buf, acl->data, acl->len);
3271 spin_unlock(&inode->i_lock);
3275 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3277 struct nfs4_cached_acl *acl;
3279 if (buf && acl_len <= PAGE_SIZE) {
3280 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3284 memcpy(acl->data, buf, acl_len);
3286 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3293 nfs4_set_cached_acl(inode, acl);
3296 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3298 struct page *pages[NFS4ACL_MAXPAGES];
3299 struct nfs_getaclargs args = {
3300 .fh = NFS_FH(inode),
3304 struct nfs_getaclres res = {
3308 struct rpc_message msg = {
3309 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3313 struct page *localpage = NULL;
3316 if (buflen < PAGE_SIZE) {
3317 /* As long as we're doing a round trip to the server anyway,
3318 * let's be prepared for a page of acl data. */
3319 localpage = alloc_page(GFP_KERNEL);
3320 resp_buf = page_address(localpage);
3321 if (localpage == NULL)
3323 args.acl_pages[0] = localpage;
3324 args.acl_pgbase = 0;
3325 args.acl_len = PAGE_SIZE;
3328 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3330 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3333 if (res.acl_len > args.acl_len)
3334 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3336 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3339 if (res.acl_len > buflen)
3342 memcpy(buf, resp_buf, res.acl_len);
3347 __free_page(localpage);
3351 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3353 struct nfs4_exception exception = { };
3356 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3359 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3360 } while (exception.retry);
3364 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3366 struct nfs_server *server = NFS_SERVER(inode);
3369 if (!nfs4_server_supports_acls(server))
3371 ret = nfs_revalidate_inode(server, inode);
3374 ret = nfs4_read_cached_acl(inode, buf, buflen);
3377 return nfs4_get_acl_uncached(inode, buf, buflen);
3380 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3382 struct nfs_server *server = NFS_SERVER(inode);
3383 struct page *pages[NFS4ACL_MAXPAGES];
3384 struct nfs_setaclargs arg = {
3385 .fh = NFS_FH(inode),
3389 struct nfs_setaclres res;
3390 struct rpc_message msg = {
3391 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3397 if (!nfs4_server_supports_acls(server))
3399 nfs_inode_return_delegation(inode);
3400 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3401 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3402 nfs_access_zap_cache(inode);
3403 nfs_zap_acl_cache(inode);
3407 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3409 struct nfs4_exception exception = { };
3412 err = nfs4_handle_exception(NFS_SERVER(inode),
3413 __nfs4_proc_set_acl(inode, buf, buflen),
3415 } while (exception.retry);
3420 _nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
3422 if (!clp || task->tk_status >= 0)
3424 switch(task->tk_status) {
3425 case -NFS4ERR_ADMIN_REVOKED:
3426 case -NFS4ERR_BAD_STATEID:
3427 case -NFS4ERR_OPENMODE:
3430 nfs4_state_mark_reclaim_nograce(clp, state);
3431 goto do_state_recovery;
3432 case -NFS4ERR_STALE_STATEID:
3435 nfs4_state_mark_reclaim_reboot(clp, state);
3436 case -NFS4ERR_STALE_CLIENTID:
3437 case -NFS4ERR_EXPIRED:
3438 goto do_state_recovery;
3439 #if defined(CONFIG_NFS_V4_1)
3440 case -NFS4ERR_BADSESSION:
3441 case -NFS4ERR_BADSLOT:
3442 case -NFS4ERR_BAD_HIGH_SLOT:
3443 case -NFS4ERR_DEADSESSION:
3444 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3445 case -NFS4ERR_SEQ_FALSE_RETRY:
3446 case -NFS4ERR_SEQ_MISORDERED:
3447 dprintk("%s ERROR %d, Reset session\n", __func__,
3449 nfs4_schedule_state_recovery(clp);
3450 task->tk_status = 0;
3452 #endif /* CONFIG_NFS_V4_1 */
3453 case -NFS4ERR_DELAY:
3455 nfs_inc_server_stats(server, NFSIOS_DELAY);
3456 case -NFS4ERR_GRACE:
3458 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3459 task->tk_status = 0;
3461 case -NFS4ERR_OLD_STATEID:
3462 task->tk_status = 0;
3465 task->tk_status = nfs4_map_errors(task->tk_status);
3468 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3469 nfs4_schedule_state_recovery(clp);
3470 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3471 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3472 task->tk_status = 0;
3477 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3479 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3482 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
3484 nfs4_verifier sc_verifier;
3485 struct nfs4_setclientid setclientid = {
3486 .sc_verifier = &sc_verifier,
3489 struct rpc_message msg = {
3490 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3491 .rpc_argp = &setclientid,
3499 p = (__be32*)sc_verifier.data;
3500 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3501 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3504 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3505 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3507 rpc_peeraddr2str(clp->cl_rpcclient,
3509 rpc_peeraddr2str(clp->cl_rpcclient,
3511 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3512 clp->cl_id_uniquifier);
3513 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3514 sizeof(setclientid.sc_netid),
3515 rpc_peeraddr2str(clp->cl_rpcclient,
3516 RPC_DISPLAY_NETID));
3517 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3518 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3519 clp->cl_ipaddr, port >> 8, port & 255);
3521 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3522 if (status != -NFS4ERR_CLID_INUSE)
3527 ssleep(clp->cl_lease_time + 1);
3529 if (++clp->cl_id_uniquifier == 0)
3535 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3537 struct nfs_fsinfo fsinfo;
3538 struct rpc_message msg = {
3539 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3541 .rpc_resp = &fsinfo,
3548 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3550 spin_lock(&clp->cl_lock);
3551 clp->cl_lease_time = fsinfo.lease_time * HZ;
3552 clp->cl_last_renewal = now;
3553 spin_unlock(&clp->cl_lock);
3558 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3563 err = _nfs4_proc_setclientid_confirm(clp, cred);
3567 case -NFS4ERR_RESOURCE:
3568 /* The IBM lawyers misread another document! */
3569 case -NFS4ERR_DELAY:
3571 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3577 struct nfs4_delegreturndata {
3578 struct nfs4_delegreturnargs args;
3579 struct nfs4_delegreturnres res;
3581 nfs4_stateid stateid;
3582 unsigned long timestamp;
3583 struct nfs_fattr fattr;
3587 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3589 struct nfs4_delegreturndata *data = calldata;
3591 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3594 switch (task->tk_status) {
3595 case -NFS4ERR_STALE_STATEID:
3596 case -NFS4ERR_EXPIRED:
3598 renew_lease(data->res.server, data->timestamp);
3601 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3603 nfs_restart_rpc(task, data->res.server->nfs_client);
3607 data->rpc_status = task->tk_status;
3610 static void nfs4_delegreturn_release(void *calldata)
3615 #if defined(CONFIG_NFS_V4_1)
3616 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3618 struct nfs4_delegreturndata *d_data;
3620 d_data = (struct nfs4_delegreturndata *)data;
3622 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3623 &d_data->args.seq_args,
3624 &d_data->res.seq_res, 1, task))
3626 rpc_call_start(task);
3628 #endif /* CONFIG_NFS_V4_1 */
3630 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3631 #if defined(CONFIG_NFS_V4_1)
3632 .rpc_call_prepare = nfs4_delegreturn_prepare,
3633 #endif /* CONFIG_NFS_V4_1 */
3634 .rpc_call_done = nfs4_delegreturn_done,
3635 .rpc_release = nfs4_delegreturn_release,
3638 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3640 struct nfs4_delegreturndata *data;
3641 struct nfs_server *server = NFS_SERVER(inode);
3642 struct rpc_task *task;
3643 struct rpc_message msg = {
3644 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3647 struct rpc_task_setup task_setup_data = {
3648 .rpc_client = server->client,
3649 .rpc_message = &msg,
3650 .callback_ops = &nfs4_delegreturn_ops,
3651 .flags = RPC_TASK_ASYNC,
3655 data = kzalloc(sizeof(*data), GFP_KERNEL);
3658 data->args.fhandle = &data->fh;
3659 data->args.stateid = &data->stateid;
3660 data->args.bitmask = server->attr_bitmask;
3661 nfs_copy_fh(&data->fh, NFS_FH(inode));
3662 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3663 data->res.fattr = &data->fattr;
3664 data->res.server = server;
3665 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3666 nfs_fattr_init(data->res.fattr);
3667 data->timestamp = jiffies;
3668 data->rpc_status = 0;
3670 task_setup_data.callback_data = data;
3671 msg.rpc_argp = &data->args,
3672 msg.rpc_resp = &data->res,
3673 task = rpc_run_task(&task_setup_data);
3675 return PTR_ERR(task);
3678 status = nfs4_wait_for_completion_rpc_task(task);
3681 status = data->rpc_status;
3684 nfs_refresh_inode(inode, &data->fattr);
3690 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3692 struct nfs_server *server = NFS_SERVER(inode);
3693 struct nfs4_exception exception = { };
3696 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3698 case -NFS4ERR_STALE_STATEID:
3699 case -NFS4ERR_EXPIRED:
3703 err = nfs4_handle_exception(server, err, &exception);
3704 } while (exception.retry);
3708 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3709 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3712 * sleep, with exponential backoff, and retry the LOCK operation.
3714 static unsigned long
3715 nfs4_set_lock_task_retry(unsigned long timeout)
3717 schedule_timeout_killable(timeout);
3719 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3720 return NFS4_LOCK_MAXTIMEOUT;
3724 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3726 struct inode *inode = state->inode;
3727 struct nfs_server *server = NFS_SERVER(inode);
3728 struct nfs_client *clp = server->nfs_client;
3729 struct nfs_lockt_args arg = {
3730 .fh = NFS_FH(inode),
3733 struct nfs_lockt_res res = {
3736 struct rpc_message msg = {
3737 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3740 .rpc_cred = state->owner->so_cred,
3742 struct nfs4_lock_state *lsp;
3745 arg.lock_owner.clientid = clp->cl_clientid;
3746 status = nfs4_set_lock_state(state, request);
3749 lsp = request->fl_u.nfs4_fl.owner;
3750 arg.lock_owner.id = lsp->ls_id.id;
3751 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3754 request->fl_type = F_UNLCK;
3756 case -NFS4ERR_DENIED:
3759 request->fl_ops->fl_release_private(request);
3764 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3766 struct nfs4_exception exception = { };
3770 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3771 _nfs4_proc_getlk(state, cmd, request),
3773 } while (exception.retry);
3777 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3780 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3782 res = posix_lock_file_wait(file, fl);
3785 res = flock_lock_file_wait(file, fl);
3793 struct nfs4_unlockdata {
3794 struct nfs_locku_args arg;
3795 struct nfs_locku_res res;
3796 struct nfs4_lock_state *lsp;
3797 struct nfs_open_context *ctx;
3798 struct file_lock fl;
3799 const struct nfs_server *server;
3800 unsigned long timestamp;
3803 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3804 struct nfs_open_context *ctx,
3805 struct nfs4_lock_state *lsp,
3806 struct nfs_seqid *seqid)
3808 struct nfs4_unlockdata *p;
3809 struct inode *inode = lsp->ls_state->inode;
3811 p = kzalloc(sizeof(*p), GFP_KERNEL);
3814 p->arg.fh = NFS_FH(inode);
3816 p->arg.seqid = seqid;
3817 p->res.seqid = seqid;
3818 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3819 p->arg.stateid = &lsp->ls_stateid;
3821 atomic_inc(&lsp->ls_count);
3822 /* Ensure we don't close file until we're done freeing locks! */
3823 p->ctx = get_nfs_open_context(ctx);
3824 memcpy(&p->fl, fl, sizeof(p->fl));
3825 p->server = NFS_SERVER(inode);
3829 static void nfs4_locku_release_calldata(void *data)
3831 struct nfs4_unlockdata *calldata = data;
3832 nfs_free_seqid(calldata->arg.seqid);
3833 nfs4_put_lock_state(calldata->lsp);
3834 put_nfs_open_context(calldata->ctx);
3838 static void nfs4_locku_done(struct rpc_task *task, void *data)
3840 struct nfs4_unlockdata *calldata = data;
3842 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3844 if (RPC_ASSASSINATED(task))
3846 switch (task->tk_status) {
3848 memcpy(calldata->lsp->ls_stateid.data,
3849 calldata->res.stateid.data,
3850 sizeof(calldata->lsp->ls_stateid.data));
3851 renew_lease(calldata->server, calldata->timestamp);
3853 case -NFS4ERR_BAD_STATEID:
3854 case -NFS4ERR_OLD_STATEID:
3855 case -NFS4ERR_STALE_STATEID:
3856 case -NFS4ERR_EXPIRED:
3859 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3860 nfs_restart_rpc(task,
3861 calldata->server->nfs_client);
3865 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3867 struct nfs4_unlockdata *calldata = data;
3869 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3871 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3872 /* Note: exit _without_ running nfs4_locku_done */
3873 task->tk_action = NULL;
3876 calldata->timestamp = jiffies;
3877 if (nfs4_setup_sequence(calldata->server->nfs_client,
3878 &calldata->arg.seq_args,
3879 &calldata->res.seq_res, 1, task))
3881 rpc_call_start(task);
3884 static const struct rpc_call_ops nfs4_locku_ops = {
3885 .rpc_call_prepare = nfs4_locku_prepare,
3886 .rpc_call_done = nfs4_locku_done,
3887 .rpc_release = nfs4_locku_release_calldata,
3890 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3891 struct nfs_open_context *ctx,
3892 struct nfs4_lock_state *lsp,
3893 struct nfs_seqid *seqid)
3895 struct nfs4_unlockdata *data;
3896 struct rpc_message msg = {
3897 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3898 .rpc_cred = ctx->cred,
3900 struct rpc_task_setup task_setup_data = {
3901 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3902 .rpc_message = &msg,
3903 .callback_ops = &nfs4_locku_ops,
3904 .workqueue = nfsiod_workqueue,
3905 .flags = RPC_TASK_ASYNC,
3908 /* Ensure this is an unlock - when canceling a lock, the
3909 * canceled lock is passed in, and it won't be an unlock.
3911 fl->fl_type = F_UNLCK;
3913 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3915 nfs_free_seqid(seqid);
3916 return ERR_PTR(-ENOMEM);
3919 msg.rpc_argp = &data->arg,
3920 msg.rpc_resp = &data->res,
3921 task_setup_data.callback_data = data;
3922 return rpc_run_task(&task_setup_data);
3925 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3927 struct nfs_inode *nfsi = NFS_I(state->inode);
3928 struct nfs_seqid *seqid;
3929 struct nfs4_lock_state *lsp;
3930 struct rpc_task *task;
3932 unsigned char fl_flags = request->fl_flags;
3934 status = nfs4_set_lock_state(state, request);
3935 /* Unlock _before_ we do the RPC call */
3936 request->fl_flags |= FL_EXISTS;
3937 down_read(&nfsi->rwsem);
3938 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3939 up_read(&nfsi->rwsem);
3942 up_read(&nfsi->rwsem);
3945 /* Is this a delegated lock? */
3946 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3948 lsp = request->fl_u.nfs4_fl.owner;
3949 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3953 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3954 status = PTR_ERR(task);
3957 status = nfs4_wait_for_completion_rpc_task(task);
3960 request->fl_flags = fl_flags;
3964 struct nfs4_lockdata {
3965 struct nfs_lock_args arg;
3966 struct nfs_lock_res res;
3967 struct nfs4_lock_state *lsp;
3968 struct nfs_open_context *ctx;
3969 struct file_lock fl;
3970 unsigned long timestamp;
3973 struct nfs_server *server;
3976 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3977 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3979 struct nfs4_lockdata *p;
3980 struct inode *inode = lsp->ls_state->inode;
3981 struct nfs_server *server = NFS_SERVER(inode);
3983 p = kzalloc(sizeof(*p), GFP_KERNEL);
3987 p->arg.fh = NFS_FH(inode);
3989 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3990 if (p->arg.open_seqid == NULL)
3992 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3993 if (p->arg.lock_seqid == NULL)
3994 goto out_free_seqid;
3995 p->arg.lock_stateid = &lsp->ls_stateid;
3996 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3997 p->arg.lock_owner.id = lsp->ls_id.id;
3998 p->res.lock_seqid = p->arg.lock_seqid;
3999 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4002 atomic_inc(&lsp->ls_count);
4003 p->ctx = get_nfs_open_context(ctx);
4004 memcpy(&p->fl, fl, sizeof(p->fl));
4007 nfs_free_seqid(p->arg.open_seqid);
4013 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4015 struct nfs4_lockdata *data = calldata;
4016 struct nfs4_state *state = data->lsp->ls_state;
4018 dprintk("%s: begin!\n", __func__);
4019 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4021 /* Do we need to do an open_to_lock_owner? */
4022 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4023 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4025 data->arg.open_stateid = &state->stateid;
4026 data->arg.new_lock_owner = 1;
4027 data->res.open_seqid = data->arg.open_seqid;
4029 data->arg.new_lock_owner = 0;
4030 data->timestamp = jiffies;
4031 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
4032 &data->res.seq_res, 1, task))
4034 rpc_call_start(task);
4035 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4038 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4040 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4041 nfs4_lock_prepare(task, calldata);
4044 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4046 struct nfs4_lockdata *data = calldata;
4048 dprintk("%s: begin!\n", __func__);
4050 nfs4_sequence_done(data->server, &data->res.seq_res,
4053 data->rpc_status = task->tk_status;
4054 if (RPC_ASSASSINATED(task))
4056 if (data->arg.new_lock_owner != 0) {
4057 if (data->rpc_status == 0)
4058 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4062 if (data->rpc_status == 0) {
4063 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4064 sizeof(data->lsp->ls_stateid.data));
4065 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4066 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
4069 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4072 static void nfs4_lock_release(void *calldata)
4074 struct nfs4_lockdata *data = calldata;
4076 dprintk("%s: begin!\n", __func__);
4077 nfs_free_seqid(data->arg.open_seqid);
4078 if (data->cancelled != 0) {
4079 struct rpc_task *task;
4080 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4081 data->arg.lock_seqid);
4084 dprintk("%s: cancelling lock!\n", __func__);
4086 nfs_free_seqid(data->arg.lock_seqid);
4087 nfs4_put_lock_state(data->lsp);
4088 put_nfs_open_context(data->ctx);
4090 dprintk("%s: done!\n", __func__);
4093 static const struct rpc_call_ops nfs4_lock_ops = {
4094 .rpc_call_prepare = nfs4_lock_prepare,
4095 .rpc_call_done = nfs4_lock_done,
4096 .rpc_release = nfs4_lock_release,
4099 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4100 .rpc_call_prepare = nfs4_recover_lock_prepare,
4101 .rpc_call_done = nfs4_lock_done,
4102 .rpc_release = nfs4_lock_release,
4105 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4107 struct nfs_client *clp = server->nfs_client;
4108 struct nfs4_state *state = lsp->ls_state;
4111 case -NFS4ERR_ADMIN_REVOKED:
4112 case -NFS4ERR_BAD_STATEID:
4113 case -NFS4ERR_EXPIRED:
4114 if (new_lock_owner != 0 ||
4115 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4116 nfs4_state_mark_reclaim_nograce(clp, state);
4117 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4119 case -NFS4ERR_STALE_STATEID:
4120 if (new_lock_owner != 0 ||
4121 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4122 nfs4_state_mark_reclaim_reboot(clp, state);
4123 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4127 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4129 struct nfs4_lockdata *data;
4130 struct rpc_task *task;
4131 struct rpc_message msg = {
4132 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4133 .rpc_cred = state->owner->so_cred,
4135 struct rpc_task_setup task_setup_data = {
4136 .rpc_client = NFS_CLIENT(state->inode),
4137 .rpc_message = &msg,
4138 .callback_ops = &nfs4_lock_ops,
4139 .workqueue = nfsiod_workqueue,
4140 .flags = RPC_TASK_ASYNC,
4144 dprintk("%s: begin!\n", __func__);
4145 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4146 fl->fl_u.nfs4_fl.owner);
4150 data->arg.block = 1;
4151 if (recovery_type > NFS_LOCK_NEW) {
4152 if (recovery_type == NFS_LOCK_RECLAIM)
4153 data->arg.reclaim = NFS_LOCK_RECLAIM;
4154 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4156 msg.rpc_argp = &data->arg,
4157 msg.rpc_resp = &data->res,
4158 task_setup_data.callback_data = data;
4159 task = rpc_run_task(&task_setup_data);
4161 return PTR_ERR(task);
4162 ret = nfs4_wait_for_completion_rpc_task(task);
4164 ret = data->rpc_status;
4166 nfs4_handle_setlk_error(data->server, data->lsp,
4167 data->arg.new_lock_owner, ret);
4169 data->cancelled = 1;
4171 dprintk("%s: done, ret = %d!\n", __func__, ret);
4175 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4177 struct nfs_server *server = NFS_SERVER(state->inode);
4178 struct nfs4_exception exception = { };
4182 /* Cache the lock if possible... */
4183 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4185 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4186 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
4188 nfs4_handle_exception(server, err, &exception);
4189 } while (exception.retry);
4193 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4195 struct nfs_server *server = NFS_SERVER(state->inode);
4196 struct nfs4_exception exception = { };
4199 err = nfs4_set_lock_state(state, request);
4203 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4205 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4209 case -NFS4ERR_GRACE:
4210 case -NFS4ERR_DELAY:
4212 nfs4_handle_exception(server, err, &exception);
4215 } while (exception.retry);
4220 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4222 struct nfs_inode *nfsi = NFS_I(state->inode);
4223 unsigned char fl_flags = request->fl_flags;
4224 int status = -ENOLCK;
4226 if ((fl_flags & FL_POSIX) &&
4227 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4229 /* Is this a delegated open? */
4230 status = nfs4_set_lock_state(state, request);
4233 request->fl_flags |= FL_ACCESS;
4234 status = do_vfs_lock(request->fl_file, request);
4237 down_read(&nfsi->rwsem);
4238 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4239 /* Yes: cache locks! */
4240 /* ...but avoid races with delegation recall... */
4241 request->fl_flags = fl_flags & ~FL_SLEEP;
4242 status = do_vfs_lock(request->fl_file, request);
4245 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4248 /* Note: we always want to sleep here! */
4249 request->fl_flags = fl_flags | FL_SLEEP;
4250 if (do_vfs_lock(request->fl_file, request) < 0)
4251 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4253 up_read(&nfsi->rwsem);
4255 request->fl_flags = fl_flags;
4259 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4261 struct nfs4_exception exception = { };
4265 err = _nfs4_proc_setlk(state, cmd, request);
4266 if (err == -NFS4ERR_DENIED)
4268 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4270 } while (exception.retry);
4275 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4277 struct nfs_open_context *ctx;
4278 struct nfs4_state *state;
4279 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4282 /* verify open state */
4283 ctx = nfs_file_open_context(filp);
4286 if (request->fl_start < 0 || request->fl_end < 0)
4289 if (IS_GETLK(cmd)) {
4291 return nfs4_proc_getlk(state, F_GETLK, request);
4295 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4298 if (request->fl_type == F_UNLCK) {
4300 return nfs4_proc_unlck(state, cmd, request);
4307 status = nfs4_proc_setlk(state, cmd, request);
4308 if ((status != -EAGAIN) || IS_SETLK(cmd))
4310 timeout = nfs4_set_lock_task_retry(timeout);
4311 status = -ERESTARTSYS;
4314 } while(status < 0);
4318 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4320 struct nfs_server *server = NFS_SERVER(state->inode);
4321 struct nfs4_exception exception = { };
4324 err = nfs4_set_lock_state(state, fl);
4328 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4331 printk(KERN_ERR "%s: unhandled error %d.\n",
4336 case -NFS4ERR_EXPIRED:
4337 case -NFS4ERR_STALE_CLIENTID:
4338 case -NFS4ERR_STALE_STATEID:
4339 case -NFS4ERR_BADSESSION:
4340 case -NFS4ERR_BADSLOT:
4341 case -NFS4ERR_BAD_HIGH_SLOT:
4342 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4343 case -NFS4ERR_DEADSESSION:
4344 nfs4_schedule_state_recovery(server->nfs_client);
4348 * The show must go on: exit, but mark the
4349 * stateid as needing recovery.
4351 case -NFS4ERR_ADMIN_REVOKED:
4352 case -NFS4ERR_BAD_STATEID:
4353 case -NFS4ERR_OPENMODE:
4354 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4358 case -NFS4ERR_DENIED:
4359 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4362 case -NFS4ERR_DELAY:
4366 err = nfs4_handle_exception(server, err, &exception);
4367 } while (exception.retry);
4372 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4374 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4375 size_t buflen, int flags)
4377 struct inode *inode = dentry->d_inode;
4379 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4382 return nfs4_proc_set_acl(inode, buf, buflen);
4385 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4386 * and that's what we'll do for e.g. user attributes that haven't been set.
4387 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4388 * attributes in kernel-managed attribute namespaces. */
4389 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4392 struct inode *inode = dentry->d_inode;
4394 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4397 return nfs4_proc_get_acl(inode, buf, buflen);
4400 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4402 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
4404 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4406 if (buf && buflen < len)
4409 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4413 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4415 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4416 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4417 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4420 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4421 NFS_ATTR_FATTR_NLINK;
4422 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4426 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4427 struct nfs4_fs_locations *fs_locations, struct page *page)
4429 struct nfs_server *server = NFS_SERVER(dir);
4431 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4432 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4434 struct nfs4_fs_locations_arg args = {
4435 .dir_fh = NFS_FH(dir),
4440 struct nfs4_fs_locations_res res = {
4441 .fs_locations = fs_locations,
4443 struct rpc_message msg = {
4444 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4450 dprintk("%s: start\n", __func__);
4451 nfs_fattr_init(&fs_locations->fattr);
4452 fs_locations->server = server;
4453 fs_locations->nlocations = 0;
4454 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4455 nfs_fixup_referral_attributes(&fs_locations->fattr);
4456 dprintk("%s: returned status = %d\n", __func__, status);
4460 #ifdef CONFIG_NFS_V4_1
4462 * nfs4_proc_exchange_id()
4464 * Since the clientid has expired, all compounds using sessions
4465 * associated with the stale clientid will be returning
4466 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4467 * be in some phase of session reset.
4469 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4471 nfs4_verifier verifier;
4472 struct nfs41_exchange_id_args args = {
4474 .flags = clp->cl_exchange_flags,
4476 struct nfs41_exchange_id_res res = {
4480 struct rpc_message msg = {
4481 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4488 dprintk("--> %s\n", __func__);
4489 BUG_ON(clp == NULL);
4491 /* Remove server-only flags */
4492 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4494 p = (u32 *)verifier.data;
4495 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4496 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4497 args.verifier = &verifier;
4500 args.id_len = scnprintf(args.id, sizeof(args.id),
4503 rpc_peeraddr2str(clp->cl_rpcclient,
4505 clp->cl_id_uniquifier);
4507 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4509 if (status != NFS4ERR_CLID_INUSE)
4515 if (++clp->cl_id_uniquifier == 0)
4519 dprintk("<-- %s status= %d\n", __func__, status);
4523 struct nfs4_get_lease_time_data {
4524 struct nfs4_get_lease_time_args *args;
4525 struct nfs4_get_lease_time_res *res;
4526 struct nfs_client *clp;
4529 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4533 struct nfs4_get_lease_time_data *data =
4534 (struct nfs4_get_lease_time_data *)calldata;
4536 dprintk("--> %s\n", __func__);
4537 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4538 /* just setup sequence, do not trigger session recovery
4539 since we're invoked within one */
4540 ret = nfs41_setup_sequence(data->clp->cl_session,
4541 &data->args->la_seq_args,
4542 &data->res->lr_seq_res, 0, task);
4544 BUG_ON(ret == -EAGAIN);
4545 rpc_call_start(task);
4546 dprintk("<-- %s\n", __func__);
4550 * Called from nfs4_state_manager thread for session setup, so don't recover
4551 * from sequence operation or clientid errors.
4553 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4555 struct nfs4_get_lease_time_data *data =
4556 (struct nfs4_get_lease_time_data *)calldata;
4558 dprintk("--> %s\n", __func__);
4559 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4560 switch (task->tk_status) {
4561 case -NFS4ERR_DELAY:
4562 case -NFS4ERR_GRACE:
4564 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4565 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4566 task->tk_status = 0;
4567 nfs_restart_rpc(task, data->clp);
4570 dprintk("<-- %s\n", __func__);
4573 struct rpc_call_ops nfs4_get_lease_time_ops = {
4574 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4575 .rpc_call_done = nfs4_get_lease_time_done,
4578 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4580 struct rpc_task *task;
4581 struct nfs4_get_lease_time_args args;
4582 struct nfs4_get_lease_time_res res = {
4583 .lr_fsinfo = fsinfo,
4585 struct nfs4_get_lease_time_data data = {
4590 struct rpc_message msg = {
4591 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4595 struct rpc_task_setup task_setup = {
4596 .rpc_client = clp->cl_rpcclient,
4597 .rpc_message = &msg,
4598 .callback_ops = &nfs4_get_lease_time_ops,
4599 .callback_data = &data
4603 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4604 dprintk("--> %s\n", __func__);
4605 task = rpc_run_task(&task_setup);
4608 status = PTR_ERR(task);
4610 status = task->tk_status;
4613 dprintk("<-- %s return %d\n", __func__, status);
4619 * Reset a slot table
4621 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4624 struct nfs4_slot *new = NULL;
4628 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4629 max_reqs, tbl->max_slots);
4631 /* Does the newly negotiated max_reqs match the existing slot table? */
4632 if (max_reqs != tbl->max_slots) {
4634 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
4641 spin_lock(&tbl->slot_tbl_lock);
4644 tbl->max_slots = max_reqs;
4646 for (i = 0; i < tbl->max_slots; ++i)
4647 tbl->slots[i].seq_nr = ivalue;
4648 spin_unlock(&tbl->slot_tbl_lock);
4649 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4650 tbl, tbl->slots, tbl->max_slots);
4652 dprintk("<-- %s: return %d\n", __func__, ret);
4657 * Reset the forechannel and backchannel slot tables
4659 static int nfs4_reset_slot_tables(struct nfs4_session *session)
4663 status = nfs4_reset_slot_table(&session->fc_slot_table,
4664 session->fc_attrs.max_reqs, 1);
4668 status = nfs4_reset_slot_table(&session->bc_slot_table,
4669 session->bc_attrs.max_reqs, 0);
4673 /* Destroy the slot table */
4674 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4676 if (session->fc_slot_table.slots != NULL) {
4677 kfree(session->fc_slot_table.slots);
4678 session->fc_slot_table.slots = NULL;
4680 if (session->bc_slot_table.slots != NULL) {
4681 kfree(session->bc_slot_table.slots);
4682 session->bc_slot_table.slots = NULL;
4688 * Initialize slot table
4690 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4691 int max_slots, int ivalue)
4693 struct nfs4_slot *slot;
4696 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4698 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4700 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4705 spin_lock(&tbl->slot_tbl_lock);
4706 tbl->max_slots = max_slots;
4708 tbl->highest_used_slotid = -1; /* no slot is currently used */
4709 spin_unlock(&tbl->slot_tbl_lock);
4710 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4711 tbl, tbl->slots, tbl->max_slots);
4713 dprintk("<-- %s: return %d\n", __func__, ret);
4718 * Initialize the forechannel and backchannel tables
4720 static int nfs4_init_slot_tables(struct nfs4_session *session)
4722 struct nfs4_slot_table *tbl;
4725 tbl = &session->fc_slot_table;
4726 if (tbl->slots == NULL) {
4727 status = nfs4_init_slot_table(tbl,
4728 session->fc_attrs.max_reqs, 1);
4733 tbl = &session->bc_slot_table;
4734 if (tbl->slots == NULL) {
4735 status = nfs4_init_slot_table(tbl,
4736 session->bc_attrs.max_reqs, 0);
4738 nfs4_destroy_slot_tables(session);
4744 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4746 struct nfs4_session *session;
4747 struct nfs4_slot_table *tbl;
4749 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4754 * The create session reply races with the server back
4755 * channel probe. Mark the client NFS_CS_SESSION_INITING
4756 * so that the client back channel can find the
4759 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4760 init_completion(&session->complete);
4762 tbl = &session->fc_slot_table;
4763 tbl->highest_used_slotid = -1;
4764 spin_lock_init(&tbl->slot_tbl_lock);
4765 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4767 tbl = &session->bc_slot_table;
4768 tbl->highest_used_slotid = -1;
4769 spin_lock_init(&tbl->slot_tbl_lock);
4770 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4776 void nfs4_destroy_session(struct nfs4_session *session)
4778 nfs4_proc_destroy_session(session);
4779 dprintk("%s Destroy backchannel for xprt %p\n",
4780 __func__, session->clp->cl_rpcclient->cl_xprt);
4781 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4782 NFS41_BC_MIN_CALLBACKS);
4783 nfs4_destroy_slot_tables(session);
4788 * Initialize the values to be used by the client in CREATE_SESSION
4789 * If nfs4_init_session set the fore channel request and response sizes,
4792 * Set the back channel max_resp_sz_cached to zero to force the client to
4793 * always set csa_cachethis to FALSE because the current implementation
4794 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4796 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4798 struct nfs4_session *session = args->client->cl_session;
4799 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4800 mxresp_sz = session->fc_attrs.max_resp_sz;
4803 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4805 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4806 /* Fore channel attributes */
4807 args->fc_attrs.headerpadsz = 0;
4808 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4809 args->fc_attrs.max_resp_sz = mxresp_sz;
4810 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4811 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4813 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4814 "max_ops=%u max_reqs=%u\n",
4816 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4817 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
4819 /* Back channel attributes */
4820 args->bc_attrs.headerpadsz = 0;
4821 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4822 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4823 args->bc_attrs.max_resp_sz_cached = 0;
4824 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4825 args->bc_attrs.max_reqs = 1;
4827 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4828 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4830 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4831 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4832 args->bc_attrs.max_reqs);
4835 static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4839 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4840 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4844 #define _verify_fore_channel_attr(_name_) \
4845 _verify_channel_attr("fore", #_name_, \
4846 args->fc_attrs._name_, \
4847 session->fc_attrs._name_)
4849 #define _verify_back_channel_attr(_name_) \
4850 _verify_channel_attr("back", #_name_, \
4851 args->bc_attrs._name_, \
4852 session->bc_attrs._name_)
4855 * The server is not allowed to increase the fore channel header pad size,
4856 * maximum response size, or maximum number of operations.
4858 * The back channel attributes are only negotiatied down: We send what the
4859 * (back channel) server insists upon.
4861 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4862 struct nfs4_session *session)
4866 ret |= _verify_fore_channel_attr(headerpadsz);
4867 ret |= _verify_fore_channel_attr(max_resp_sz);
4868 ret |= _verify_fore_channel_attr(max_ops);
4870 ret |= _verify_back_channel_attr(headerpadsz);
4871 ret |= _verify_back_channel_attr(max_rqst_sz);
4872 ret |= _verify_back_channel_attr(max_resp_sz);
4873 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4874 ret |= _verify_back_channel_attr(max_ops);
4875 ret |= _verify_back_channel_attr(max_reqs);
4880 static int _nfs4_proc_create_session(struct nfs_client *clp)
4882 struct nfs4_session *session = clp->cl_session;
4883 struct nfs41_create_session_args args = {
4885 .cb_program = NFS4_CALLBACK,
4887 struct nfs41_create_session_res res = {
4890 struct rpc_message msg = {
4891 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4897 nfs4_init_channel_attrs(&args);
4898 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
4900 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4903 /* Verify the session's negotiated channel_attrs values */
4904 status = nfs4_verify_channel_attrs(&args, session);
4906 /* Increment the clientid slot sequence id */
4914 * Issues a CREATE_SESSION operation to the server.
4915 * It is the responsibility of the caller to verify the session is
4916 * expired before calling this routine.
4918 int nfs4_proc_create_session(struct nfs_client *clp)
4922 struct nfs4_session *session = clp->cl_session;
4924 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4926 status = _nfs4_proc_create_session(clp);
4930 /* Init and reset the fore channel */
4931 status = nfs4_init_slot_tables(session);
4932 dprintk("slot table initialization returned %d\n", status);
4935 status = nfs4_reset_slot_tables(session);
4936 dprintk("slot table reset returned %d\n", status);
4940 ptr = (unsigned *)&session->sess_id.data[0];
4941 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4942 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4944 dprintk("<-- %s\n", __func__);
4949 * Issue the over-the-wire RPC DESTROY_SESSION.
4950 * The caller must serialize access to this routine.
4952 int nfs4_proc_destroy_session(struct nfs4_session *session)
4955 struct rpc_message msg;
4957 dprintk("--> nfs4_proc_destroy_session\n");
4959 /* session is still being setup */
4960 if (session->clp->cl_cons_state != NFS_CS_READY)
4963 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4964 msg.rpc_argp = session;
4965 msg.rpc_resp = NULL;
4966 msg.rpc_cred = NULL;
4967 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4971 "Got error %d from the server on DESTROY_SESSION. "
4972 "Session has been destroyed regardless...\n", status);
4974 dprintk("<-- nfs4_proc_destroy_session\n");
4978 int nfs4_init_session(struct nfs_server *server)
4980 struct nfs_client *clp = server->nfs_client;
4981 struct nfs4_session *session;
4982 unsigned int rsize, wsize;
4985 if (!nfs4_has_session(clp))
4988 rsize = server->rsize;
4990 rsize = NFS_MAX_FILE_IO_SIZE;
4991 wsize = server->wsize;
4993 wsize = NFS_MAX_FILE_IO_SIZE;
4995 session = clp->cl_session;
4996 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
4997 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
4999 ret = nfs4_recover_expired_lease(server);
5001 ret = nfs4_check_client_ready(clp);
5006 * Renew the cl_session lease.
5008 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5010 struct nfs4_sequence_args args;
5011 struct nfs4_sequence_res res;
5013 struct rpc_message msg = {
5014 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5020 args.sa_cache_this = 0;
5022 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
5023 &res, args.sa_cache_this, 1);
5026 void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5028 struct nfs_client *clp = (struct nfs_client *)data;
5030 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
5032 if (task->tk_status < 0) {
5033 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5035 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
5037 nfs_restart_rpc(task, clp);
5041 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5043 kfree(task->tk_msg.rpc_argp);
5044 kfree(task->tk_msg.rpc_resp);
5046 dprintk("<-- %s\n", __func__);
5049 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5051 struct nfs_client *clp;
5052 struct nfs4_sequence_args *args;
5053 struct nfs4_sequence_res *res;
5055 clp = (struct nfs_client *)data;
5056 args = task->tk_msg.rpc_argp;
5057 res = task->tk_msg.rpc_resp;
5059 if (nfs4_setup_sequence(clp, args, res, 0, task))
5061 rpc_call_start(task);
5064 static const struct rpc_call_ops nfs41_sequence_ops = {
5065 .rpc_call_done = nfs41_sequence_call_done,
5066 .rpc_call_prepare = nfs41_sequence_prepare,
5069 static int nfs41_proc_async_sequence(struct nfs_client *clp,
5070 struct rpc_cred *cred)
5072 struct nfs4_sequence_args *args;
5073 struct nfs4_sequence_res *res;
5074 struct rpc_message msg = {
5075 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5079 args = kzalloc(sizeof(*args), GFP_KERNEL);
5082 res = kzalloc(sizeof(*res), GFP_KERNEL);
5087 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
5088 msg.rpc_argp = args;
5091 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
5092 &nfs41_sequence_ops, (void *)clp);
5095 struct nfs4_reclaim_complete_data {
5096 struct nfs_client *clp;
5097 struct nfs41_reclaim_complete_args arg;
5098 struct nfs41_reclaim_complete_res res;
5101 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5103 struct nfs4_reclaim_complete_data *calldata = data;
5105 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5106 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
5107 &calldata->res.seq_res, 0, task))
5110 rpc_call_start(task);
5113 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5115 struct nfs4_reclaim_complete_data *calldata = data;
5116 struct nfs_client *clp = calldata->clp;
5117 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5119 dprintk("--> %s\n", __func__);
5120 nfs41_sequence_done(clp, res, task->tk_status);
5121 switch (task->tk_status) {
5123 case -NFS4ERR_COMPLETE_ALREADY:
5125 case -NFS4ERR_BADSESSION:
5126 case -NFS4ERR_DEADSESSION:
5128 * Handle the session error, but do not retry the operation, as
5129 * we have no way of telling whether the clientid had to be
5130 * reset before we got our reply. If reset, a new wave of
5131 * reclaim operations will follow, containing their own reclaim
5132 * complete. We don't want our retry to get on the way of
5133 * recovery by incorrectly indicating to the server that we're
5134 * done reclaiming state since the process had to be restarted.
5136 _nfs4_async_handle_error(task, NULL, clp, NULL);
5139 if (_nfs4_async_handle_error(
5140 task, NULL, clp, NULL) == -EAGAIN) {
5141 rpc_restart_call_prepare(task);
5146 dprintk("<-- %s\n", __func__);
5149 static void nfs4_free_reclaim_complete_data(void *data)
5151 struct nfs4_reclaim_complete_data *calldata = data;
5156 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5157 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5158 .rpc_call_done = nfs4_reclaim_complete_done,
5159 .rpc_release = nfs4_free_reclaim_complete_data,
5163 * Issue a global reclaim complete.
5165 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5167 struct nfs4_reclaim_complete_data *calldata;
5168 struct rpc_task *task;
5169 struct rpc_message msg = {
5170 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5172 struct rpc_task_setup task_setup_data = {
5173 .rpc_client = clp->cl_rpcclient,
5174 .rpc_message = &msg,
5175 .callback_ops = &nfs4_reclaim_complete_call_ops,
5176 .flags = RPC_TASK_ASYNC,
5178 int status = -ENOMEM;
5180 dprintk("--> %s\n", __func__);
5181 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
5182 if (calldata == NULL)
5184 calldata->clp = clp;
5185 calldata->arg.one_fs = 0;
5186 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5188 msg.rpc_argp = &calldata->arg;
5189 msg.rpc_resp = &calldata->res;
5190 task_setup_data.callback_data = calldata;
5191 task = rpc_run_task(&task_setup_data);
5193 status = PTR_ERR(task);
5196 dprintk("<-- %s status=%d\n", __func__, status);
5199 #endif /* CONFIG_NFS_V4_1 */
5201 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
5202 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5203 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5204 .recover_open = nfs4_open_reclaim,
5205 .recover_lock = nfs4_lock_reclaim,
5206 .establish_clid = nfs4_init_clientid,
5207 .get_clid_cred = nfs4_get_setclientid_cred,
5210 #if defined(CONFIG_NFS_V4_1)
5211 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5212 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5213 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5214 .recover_open = nfs4_open_reclaim,
5215 .recover_lock = nfs4_lock_reclaim,
5216 .establish_clid = nfs41_init_clientid,
5217 .get_clid_cred = nfs4_get_exchange_id_cred,
5218 .reclaim_complete = nfs41_proc_reclaim_complete,
5220 #endif /* CONFIG_NFS_V4_1 */
5222 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5223 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5224 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5225 .recover_open = nfs4_open_expired,
5226 .recover_lock = nfs4_lock_expired,
5227 .establish_clid = nfs4_init_clientid,
5228 .get_clid_cred = nfs4_get_setclientid_cred,
5231 #if defined(CONFIG_NFS_V4_1)
5232 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
5233 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5234 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5235 .recover_open = nfs4_open_expired,
5236 .recover_lock = nfs4_lock_expired,
5237 .establish_clid = nfs41_init_clientid,
5238 .get_clid_cred = nfs4_get_exchange_id_cred,
5240 #endif /* CONFIG_NFS_V4_1 */
5242 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5243 .sched_state_renewal = nfs4_proc_async_renew,
5244 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
5245 .renew_lease = nfs4_proc_renew,
5248 #if defined(CONFIG_NFS_V4_1)
5249 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5250 .sched_state_renewal = nfs41_proc_async_sequence,
5251 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
5252 .renew_lease = nfs4_proc_sequence,
5257 * Per minor version reboot and network partition recovery ops
5260 struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5261 &nfs40_reboot_recovery_ops,
5262 #if defined(CONFIG_NFS_V4_1)
5263 &nfs41_reboot_recovery_ops,
5267 struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5268 &nfs40_nograce_recovery_ops,
5269 #if defined(CONFIG_NFS_V4_1)
5270 &nfs41_nograce_recovery_ops,
5274 struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5275 &nfs40_state_renewal_ops,
5276 #if defined(CONFIG_NFS_V4_1)
5277 &nfs41_state_renewal_ops,
5281 static const struct inode_operations nfs4_file_inode_operations = {
5282 .permission = nfs_permission,
5283 .getattr = nfs_getattr,
5284 .setattr = nfs_setattr,
5285 .getxattr = nfs4_getxattr,
5286 .setxattr = nfs4_setxattr,
5287 .listxattr = nfs4_listxattr,
5290 const struct nfs_rpc_ops nfs_v4_clientops = {
5291 .version = 4, /* protocol version */
5292 .dentry_ops = &nfs4_dentry_operations,
5293 .dir_inode_ops = &nfs4_dir_inode_operations,
5294 .file_inode_ops = &nfs4_file_inode_operations,
5295 .getroot = nfs4_proc_get_root,
5296 .getattr = nfs4_proc_getattr,
5297 .setattr = nfs4_proc_setattr,
5298 .lookupfh = nfs4_proc_lookupfh,
5299 .lookup = nfs4_proc_lookup,
5300 .access = nfs4_proc_access,
5301 .readlink = nfs4_proc_readlink,
5302 .create = nfs4_proc_create,
5303 .remove = nfs4_proc_remove,
5304 .unlink_setup = nfs4_proc_unlink_setup,
5305 .unlink_done = nfs4_proc_unlink_done,
5306 .rename = nfs4_proc_rename,
5307 .link = nfs4_proc_link,
5308 .symlink = nfs4_proc_symlink,
5309 .mkdir = nfs4_proc_mkdir,
5310 .rmdir = nfs4_proc_remove,
5311 .readdir = nfs4_proc_readdir,
5312 .mknod = nfs4_proc_mknod,
5313 .statfs = nfs4_proc_statfs,
5314 .fsinfo = nfs4_proc_fsinfo,
5315 .pathconf = nfs4_proc_pathconf,
5316 .set_capabilities = nfs4_server_capabilities,
5317 .decode_dirent = nfs4_decode_dirent,
5318 .read_setup = nfs4_proc_read_setup,
5319 .read_done = nfs4_read_done,
5320 .write_setup = nfs4_proc_write_setup,
5321 .write_done = nfs4_write_done,
5322 .commit_setup = nfs4_proc_commit_setup,
5323 .commit_done = nfs4_commit_done,
5324 .lock = nfs4_proc_lock,
5325 .clear_acl_cache = nfs4_zap_acl_attr,
5326 .close_context = nfs4_close_context,