4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/utsname.h>
40 #include <linux/delay.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/smp_lock.h>
49 #include <linux/namei.h>
50 #include <linux/mount.h>
53 #include "delegation.h"
57 #define NFSDBG_FACILITY NFSDBG_PROC
59 #define NFS4_POLL_RETRY_MIN (HZ/10)
60 #define NFS4_POLL_RETRY_MAX (15*HZ)
63 static int _nfs4_proc_open(struct nfs4_opendata *data);
64 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
65 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
66 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
67 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
69 /* Prevent leaks of NFSv4 errors into userland */
70 static int nfs4_map_errors(int err)
73 dprintk("%s could not handle NFSv4 error %d\n",
81 * This is our standard bitmap for GETATTR requests.
83 const u32 nfs4_fattr_bitmap[2] = {
88 | FATTR4_WORD0_FILEID,
90 | FATTR4_WORD1_NUMLINKS
92 | FATTR4_WORD1_OWNER_GROUP
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
100 const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
109 const u32 nfs4_pathconf_bitmap[2] = {
111 | FATTR4_WORD0_MAXNAME,
115 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
122 const u32 nfs4_fs_locations_bitmap[2] = {
124 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
130 | FATTR4_WORD1_NUMLINKS
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
141 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
142 struct nfs4_readdir_arg *readdir)
146 BUG_ON(readdir->count < 80);
148 readdir->cookie = cookie;
149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
165 start = p = kmap_atomic(*readdir->pages, KM_USER0);
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
177 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
189 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
196 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
202 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
203 nfs_wait_bit_killable, TASK_KILLABLE);
207 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
214 *timeout = NFS4_POLL_RETRY_MIN;
215 if (*timeout > NFS4_POLL_RETRY_MAX)
216 *timeout = NFS4_POLL_RETRY_MAX;
217 schedule_timeout_killable(*timeout);
218 if (fatal_signal_pending(current))
224 /* This is the error handling routine for processes that are allowed
227 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
229 struct nfs_client *clp = server->nfs_client;
230 struct nfs4_state *state = exception->state;
233 exception->retry = 0;
237 case -NFS4ERR_ADMIN_REVOKED:
238 case -NFS4ERR_BAD_STATEID:
239 case -NFS4ERR_OPENMODE:
242 nfs4_state_mark_reclaim_nograce(clp, state);
243 case -NFS4ERR_STALE_CLIENTID:
244 case -NFS4ERR_STALE_STATEID:
245 case -NFS4ERR_EXPIRED:
246 nfs4_schedule_state_recovery(clp);
247 ret = nfs4_wait_clnt_recover(clp);
249 exception->retry = 1;
251 case -NFS4ERR_FILE_OPEN:
254 ret = nfs4_delay(server->client, &exception->timeout);
257 case -NFS4ERR_OLD_STATEID:
258 exception->retry = 1;
260 /* We failed to handle the error */
261 return nfs4_map_errors(ret);
265 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
267 struct nfs_client *clp = server->nfs_client;
268 spin_lock(&clp->cl_lock);
269 if (time_before(clp->cl_last_renewal,timestamp))
270 clp->cl_last_renewal = timestamp;
271 spin_unlock(&clp->cl_lock);
274 #if defined(CONFIG_NFS_V4_1)
277 * nfs4_free_slot - free a slot and efficiently update slot table.
279 * freeing a slot is trivially done by clearing its respective bit
281 * If the freed slotid equals highest_used_slotid we want to update it
282 * so that the server would be able to size down the slot table if needed,
283 * otherwise we know that the highest_used_slotid is still in use.
284 * When updating highest_used_slotid there may be "holes" in the bitmap
285 * so we need to scan down from highest_used_slotid to 0 looking for the now
286 * highest slotid in use.
287 * If none found, highest_used_slotid is set to -1.
290 nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
292 int slotid = free_slotid;
294 spin_lock(&tbl->slot_tbl_lock);
295 /* clear used bit in bitmap */
296 __clear_bit(slotid, tbl->used_slots);
298 /* update highest_used_slotid when it is freed */
299 if (slotid == tbl->highest_used_slotid) {
300 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
301 if (slotid >= 0 && slotid < tbl->max_slots)
302 tbl->highest_used_slotid = slotid;
304 tbl->highest_used_slotid = -1;
306 rpc_wake_up_next(&tbl->slot_tbl_waitq);
307 spin_unlock(&tbl->slot_tbl_lock);
308 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
309 free_slotid, tbl->highest_used_slotid);
312 void nfs41_sequence_free_slot(const struct nfs_client *clp,
313 struct nfs4_sequence_res *res)
315 struct nfs4_slot_table *tbl;
317 if (!nfs4_has_session(clp)) {
318 dprintk("%s: No session\n", __func__);
321 tbl = &clp->cl_session->fc_slot_table;
322 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
323 dprintk("%s: No slot\n", __func__);
324 /* just wake up the next guy waiting since
325 * we may have not consumed a slot after all */
326 rpc_wake_up_next(&tbl->slot_tbl_waitq);
329 nfs4_free_slot(tbl, res->sr_slotid);
330 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
333 static void nfs41_sequence_done(struct nfs_client *clp,
334 struct nfs4_sequence_res *res,
337 unsigned long timestamp;
338 struct nfs4_slot_table *tbl;
339 struct nfs4_slot *slot;
342 * sr_status remains 1 if an RPC level error occurred. The server
343 * may or may not have processed the sequence operation..
344 * Proceed as if the server received and processed the sequence
347 if (res->sr_status == 1)
348 res->sr_status = NFS_OK;
350 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
351 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
354 tbl = &clp->cl_session->fc_slot_table;
355 slot = tbl->slots + res->sr_slotid;
357 if (res->sr_status == 0) {
358 /* Update the slot's sequence and clientid lease timer */
360 timestamp = res->sr_renewal_time;
361 spin_lock(&clp->cl_lock);
362 if (time_before(clp->cl_last_renewal, timestamp))
363 clp->cl_last_renewal = timestamp;
364 spin_unlock(&clp->cl_lock);
368 /* The session may be reset by one of the error handlers. */
369 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
370 nfs41_sequence_free_slot(clp, res);
374 * nfs4_find_slot - efficiently look for a free slot
376 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
377 * If found, we mark the slot as used, update the highest_used_slotid,
378 * and respectively set up the sequence operation args.
379 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
381 * Note: must be called with under the slot_tbl_lock.
384 nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
387 u8 ret_id = NFS4_MAX_SLOT_TABLE;
388 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
390 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
391 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
393 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
394 if (slotid >= tbl->max_slots)
396 __set_bit(slotid, tbl->used_slots);
397 if (slotid > tbl->highest_used_slotid)
398 tbl->highest_used_slotid = slotid;
401 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
402 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
406 static int nfs41_setup_sequence(struct nfs4_session *session,
407 struct nfs4_sequence_args *args,
408 struct nfs4_sequence_res *res,
410 struct rpc_task *task)
412 struct nfs4_slot *slot;
413 struct nfs4_slot_table *tbl;
416 dprintk("--> %s\n", __func__);
417 /* slot already allocated? */
418 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
421 memset(res, 0, sizeof(*res));
422 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
423 tbl = &session->fc_slot_table;
425 spin_lock(&tbl->slot_tbl_lock);
426 slotid = nfs4_find_slot(tbl, task);
427 if (slotid == NFS4_MAX_SLOT_TABLE) {
428 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
429 spin_unlock(&tbl->slot_tbl_lock);
430 dprintk("<-- %s: no free slots\n", __func__);
433 spin_unlock(&tbl->slot_tbl_lock);
435 slot = tbl->slots + slotid;
436 args->sa_slotid = slotid;
437 args->sa_cache_this = cache_reply;
439 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
441 res->sr_slotid = slotid;
442 res->sr_renewal_time = jiffies;
444 * sr_status is only set in decode_sequence, and so will remain
445 * set to 1 if an rpc level failure occurs.
451 int nfs4_setup_sequence(struct nfs_client *clp,
452 struct nfs4_sequence_args *args,
453 struct nfs4_sequence_res *res,
455 struct rpc_task *task)
459 dprintk("--> %s clp %p session %p sr_slotid %d\n",
460 __func__, clp, clp->cl_session, res->sr_slotid);
462 if (!nfs4_has_session(clp))
464 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
466 if (ret != -EAGAIN) {
467 /* terminate rpc task */
468 task->tk_status = ret;
469 task->tk_action = NULL;
472 dprintk("<-- %s status=%d\n", __func__, ret);
476 struct nfs41_call_sync_data {
477 struct nfs_client *clp;
478 struct nfs4_sequence_args *seq_args;
479 struct nfs4_sequence_res *seq_res;
483 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
485 struct nfs41_call_sync_data *data = calldata;
487 dprintk("--> %s data->clp->cl_session %p\n", __func__,
488 data->clp->cl_session);
489 if (nfs4_setup_sequence(data->clp, data->seq_args,
490 data->seq_res, data->cache_reply, task))
492 rpc_call_start(task);
495 struct rpc_call_ops nfs41_call_sync_ops = {
496 .rpc_call_prepare = nfs41_call_sync_prepare,
499 static int nfs4_call_sync_sequence(struct nfs_client *clp,
500 struct rpc_clnt *clnt,
501 struct rpc_message *msg,
502 struct nfs4_sequence_args *args,
503 struct nfs4_sequence_res *res,
507 struct rpc_task *task;
508 struct nfs41_call_sync_data data = {
512 .cache_reply = cache_reply,
514 struct rpc_task_setup task_setup = {
517 .callback_ops = &nfs41_call_sync_ops,
518 .callback_data = &data
521 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
522 task = rpc_run_task(&task_setup);
526 ret = task->tk_status;
532 int _nfs4_call_sync_session(struct nfs_server *server,
533 struct rpc_message *msg,
534 struct nfs4_sequence_args *args,
535 struct nfs4_sequence_res *res,
538 return nfs4_call_sync_sequence(server->nfs_client, server->client,
539 msg, args, res, cache_reply);
542 #endif /* CONFIG_NFS_V4_1 */
544 int _nfs4_call_sync(struct nfs_server *server,
545 struct rpc_message *msg,
546 struct nfs4_sequence_args *args,
547 struct nfs4_sequence_res *res,
550 args->sa_session = res->sr_session = NULL;
551 return rpc_call_sync(server->client, msg, 0);
554 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
555 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
556 &(res)->seq_res, (cache_reply))
558 static void nfs4_sequence_done(const struct nfs_server *server,
559 struct nfs4_sequence_res *res, int rpc_status)
561 #ifdef CONFIG_NFS_V4_1
562 if (nfs4_has_session(server->nfs_client))
563 nfs41_sequence_done(server->nfs_client, res, rpc_status);
564 #endif /* CONFIG_NFS_V4_1 */
567 /* no restart, therefore free slot here */
568 static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
569 struct nfs4_sequence_res *res,
572 nfs4_sequence_done(server, res, rpc_status);
573 nfs4_sequence_free_slot(server->nfs_client, res);
576 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
578 struct nfs_inode *nfsi = NFS_I(dir);
580 spin_lock(&dir->i_lock);
581 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
582 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
583 nfs_force_lookup_revalidate(dir);
584 nfsi->change_attr = cinfo->after;
585 spin_unlock(&dir->i_lock);
588 struct nfs4_opendata {
590 struct nfs_openargs o_arg;
591 struct nfs_openres o_res;
592 struct nfs_open_confirmargs c_arg;
593 struct nfs_open_confirmres c_res;
594 struct nfs_fattr f_attr;
595 struct nfs_fattr dir_attr;
598 struct nfs4_state_owner *owner;
599 struct nfs4_state *state;
601 unsigned long timestamp;
602 unsigned int rpc_done : 1;
608 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
610 p->o_res.f_attr = &p->f_attr;
611 p->o_res.dir_attr = &p->dir_attr;
612 p->o_res.seqid = p->o_arg.seqid;
613 p->c_res.seqid = p->c_arg.seqid;
614 p->o_res.server = p->o_arg.server;
615 nfs_fattr_init(&p->f_attr);
616 nfs_fattr_init(&p->dir_attr);
619 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
620 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
621 const struct iattr *attrs)
623 struct dentry *parent = dget_parent(path->dentry);
624 struct inode *dir = parent->d_inode;
625 struct nfs_server *server = NFS_SERVER(dir);
626 struct nfs4_opendata *p;
628 p = kzalloc(sizeof(*p), GFP_KERNEL);
631 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
632 if (p->o_arg.seqid == NULL)
634 p->path.mnt = mntget(path->mnt);
635 p->path.dentry = dget(path->dentry);
638 atomic_inc(&sp->so_count);
639 p->o_arg.fh = NFS_FH(dir);
640 p->o_arg.open_flags = flags;
641 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
642 p->o_arg.clientid = server->nfs_client->cl_clientid;
643 p->o_arg.id = sp->so_owner_id.id;
644 p->o_arg.name = &p->path.dentry->d_name;
645 p->o_arg.server = server;
646 p->o_arg.bitmask = server->attr_bitmask;
647 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
648 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
649 if (flags & O_EXCL) {
650 u32 *s = (u32 *) p->o_arg.u.verifier.data;
653 } else if (flags & O_CREAT) {
654 p->o_arg.u.attrs = &p->attrs;
655 memcpy(&p->attrs, attrs, sizeof(p->attrs));
657 p->c_arg.fh = &p->o_res.fh;
658 p->c_arg.stateid = &p->o_res.stateid;
659 p->c_arg.seqid = p->o_arg.seqid;
660 nfs4_init_opendata_res(p);
670 static void nfs4_opendata_free(struct kref *kref)
672 struct nfs4_opendata *p = container_of(kref,
673 struct nfs4_opendata, kref);
675 nfs_free_seqid(p->o_arg.seqid);
676 if (p->state != NULL)
677 nfs4_put_open_state(p->state);
678 nfs4_put_state_owner(p->owner);
684 static void nfs4_opendata_put(struct nfs4_opendata *p)
687 kref_put(&p->kref, nfs4_opendata_free);
690 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
694 ret = rpc_wait_for_completion_task(task);
698 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
702 if (open_mode & O_EXCL)
704 switch (mode & (FMODE_READ|FMODE_WRITE)) {
706 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
709 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
711 case FMODE_READ|FMODE_WRITE:
712 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
718 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
720 if ((delegation->type & fmode) != fmode)
722 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
724 nfs_mark_delegation_referenced(delegation);
728 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
737 case FMODE_READ|FMODE_WRITE:
740 nfs4_state_set_mode_locked(state, state->state | fmode);
743 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
745 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
746 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
747 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
750 set_bit(NFS_O_RDONLY_STATE, &state->flags);
753 set_bit(NFS_O_WRONLY_STATE, &state->flags);
755 case FMODE_READ|FMODE_WRITE:
756 set_bit(NFS_O_RDWR_STATE, &state->flags);
760 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
762 write_seqlock(&state->seqlock);
763 nfs_set_open_stateid_locked(state, stateid, fmode);
764 write_sequnlock(&state->seqlock);
767 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
770 * Protect the call to nfs4_state_set_mode_locked and
771 * serialise the stateid update
773 write_seqlock(&state->seqlock);
774 if (deleg_stateid != NULL) {
775 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
776 set_bit(NFS_DELEGATED_STATE, &state->flags);
778 if (open_stateid != NULL)
779 nfs_set_open_stateid_locked(state, open_stateid, fmode);
780 write_sequnlock(&state->seqlock);
781 spin_lock(&state->owner->so_lock);
782 update_open_stateflags(state, fmode);
783 spin_unlock(&state->owner->so_lock);
786 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
788 struct nfs_inode *nfsi = NFS_I(state->inode);
789 struct nfs_delegation *deleg_cur;
792 fmode &= (FMODE_READ|FMODE_WRITE);
795 deleg_cur = rcu_dereference(nfsi->delegation);
796 if (deleg_cur == NULL)
799 spin_lock(&deleg_cur->lock);
800 if (nfsi->delegation != deleg_cur ||
801 (deleg_cur->type & fmode) != fmode)
802 goto no_delegation_unlock;
804 if (delegation == NULL)
805 delegation = &deleg_cur->stateid;
806 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
807 goto no_delegation_unlock;
809 nfs_mark_delegation_referenced(deleg_cur);
810 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
812 no_delegation_unlock:
813 spin_unlock(&deleg_cur->lock);
817 if (!ret && open_stateid != NULL) {
818 __update_open_stateid(state, open_stateid, NULL, fmode);
826 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
828 struct nfs_delegation *delegation;
831 delegation = rcu_dereference(NFS_I(inode)->delegation);
832 if (delegation == NULL || (delegation->type & fmode) == fmode) {
837 nfs_inode_return_delegation(inode);
840 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
842 struct nfs4_state *state = opendata->state;
843 struct nfs_inode *nfsi = NFS_I(state->inode);
844 struct nfs_delegation *delegation;
845 int open_mode = opendata->o_arg.open_flags & O_EXCL;
846 fmode_t fmode = opendata->o_arg.fmode;
847 nfs4_stateid stateid;
851 if (can_open_cached(state, fmode, open_mode)) {
852 spin_lock(&state->owner->so_lock);
853 if (can_open_cached(state, fmode, open_mode)) {
854 update_open_stateflags(state, fmode);
855 spin_unlock(&state->owner->so_lock);
856 goto out_return_state;
858 spin_unlock(&state->owner->so_lock);
861 delegation = rcu_dereference(nfsi->delegation);
862 if (delegation == NULL ||
863 !can_open_delegated(delegation, fmode)) {
867 /* Save the delegation */
868 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
870 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
875 /* Try to update the stateid using the delegation */
876 if (update_open_stateid(state, NULL, &stateid, fmode))
877 goto out_return_state;
882 atomic_inc(&state->count);
886 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
889 struct nfs4_state *state = NULL;
890 struct nfs_delegation *delegation;
893 if (!data->rpc_done) {
894 state = nfs4_try_open_cached(data);
899 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
901 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
902 ret = PTR_ERR(inode);
906 state = nfs4_get_open_state(inode, data->owner);
909 if (data->o_res.delegation_type != 0) {
910 int delegation_flags = 0;
913 delegation = rcu_dereference(NFS_I(inode)->delegation);
915 delegation_flags = delegation->flags;
917 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
918 nfs_inode_set_delegation(state->inode,
919 data->owner->so_cred,
922 nfs_inode_reclaim_delegation(state->inode,
923 data->owner->so_cred,
927 update_open_stateid(state, &data->o_res.stateid, NULL,
938 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
940 struct nfs_inode *nfsi = NFS_I(state->inode);
941 struct nfs_open_context *ctx;
943 spin_lock(&state->inode->i_lock);
944 list_for_each_entry(ctx, &nfsi->open_files, list) {
945 if (ctx->state != state)
947 get_nfs_open_context(ctx);
948 spin_unlock(&state->inode->i_lock);
951 spin_unlock(&state->inode->i_lock);
952 return ERR_PTR(-ENOENT);
955 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
957 struct nfs4_opendata *opendata;
959 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
960 if (opendata == NULL)
961 return ERR_PTR(-ENOMEM);
962 opendata->state = state;
963 atomic_inc(&state->count);
967 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
969 struct nfs4_state *newstate;
972 opendata->o_arg.open_flags = 0;
973 opendata->o_arg.fmode = fmode;
974 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
975 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
976 nfs4_init_opendata_res(opendata);
977 ret = _nfs4_proc_open(opendata);
980 newstate = nfs4_opendata_to_nfs4_state(opendata);
981 if (IS_ERR(newstate))
982 return PTR_ERR(newstate);
983 nfs4_close_state(&opendata->path, newstate, fmode);
988 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
990 struct nfs4_state *newstate;
993 /* memory barrier prior to reading state->n_* */
994 clear_bit(NFS_DELEGATED_STATE, &state->flags);
996 if (state->n_rdwr != 0) {
997 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1000 if (newstate != state)
1003 if (state->n_wronly != 0) {
1004 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1007 if (newstate != state)
1010 if (state->n_rdonly != 0) {
1011 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1014 if (newstate != state)
1018 * We may have performed cached opens for all three recoveries.
1019 * Check if we need to update the current stateid.
1021 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1022 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1023 write_seqlock(&state->seqlock);
1024 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1025 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1026 write_sequnlock(&state->seqlock);
1033 * reclaim state on the server after a reboot.
1035 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1037 struct nfs_delegation *delegation;
1038 struct nfs4_opendata *opendata;
1039 fmode_t delegation_type = 0;
1042 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1043 if (IS_ERR(opendata))
1044 return PTR_ERR(opendata);
1045 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1046 opendata->o_arg.fh = NFS_FH(state->inode);
1048 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1049 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1050 delegation_type = delegation->type;
1052 opendata->o_arg.u.delegation_type = delegation_type;
1053 status = nfs4_open_recover(opendata, state);
1054 nfs4_opendata_put(opendata);
1058 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1060 struct nfs_server *server = NFS_SERVER(state->inode);
1061 struct nfs4_exception exception = { };
1064 err = _nfs4_do_open_reclaim(ctx, state);
1065 if (err != -NFS4ERR_DELAY)
1067 nfs4_handle_exception(server, err, &exception);
1068 } while (exception.retry);
1072 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1074 struct nfs_open_context *ctx;
1077 ctx = nfs4_state_find_open_context(state);
1079 return PTR_ERR(ctx);
1080 ret = nfs4_do_open_reclaim(ctx, state);
1081 put_nfs_open_context(ctx);
1085 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1087 struct nfs4_opendata *opendata;
1090 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1091 if (IS_ERR(opendata))
1092 return PTR_ERR(opendata);
1093 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1094 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1095 sizeof(opendata->o_arg.u.delegation.data));
1096 ret = nfs4_open_recover(opendata, state);
1097 nfs4_opendata_put(opendata);
1101 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1103 struct nfs4_exception exception = { };
1104 struct nfs_server *server = NFS_SERVER(state->inode);
1107 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1111 case -NFS4ERR_STALE_CLIENTID:
1112 case -NFS4ERR_STALE_STATEID:
1113 case -NFS4ERR_EXPIRED:
1114 /* Don't recall a delegation if it was lost */
1115 nfs4_schedule_state_recovery(server->nfs_client);
1118 err = nfs4_handle_exception(server, err, &exception);
1119 } while (exception.retry);
1123 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1125 struct nfs4_opendata *data = calldata;
1127 data->rpc_status = task->tk_status;
1128 if (RPC_ASSASSINATED(task))
1130 if (data->rpc_status == 0) {
1131 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1132 sizeof(data->o_res.stateid.data));
1133 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1134 renew_lease(data->o_res.server, data->timestamp);
1139 static void nfs4_open_confirm_release(void *calldata)
1141 struct nfs4_opendata *data = calldata;
1142 struct nfs4_state *state = NULL;
1144 /* If this request hasn't been cancelled, do nothing */
1145 if (data->cancelled == 0)
1147 /* In case of error, no cleanup! */
1148 if (!data->rpc_done)
1150 state = nfs4_opendata_to_nfs4_state(data);
1152 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1154 nfs4_opendata_put(data);
1157 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1158 .rpc_call_done = nfs4_open_confirm_done,
1159 .rpc_release = nfs4_open_confirm_release,
1163 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1165 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1167 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1168 struct rpc_task *task;
1169 struct rpc_message msg = {
1170 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1171 .rpc_argp = &data->c_arg,
1172 .rpc_resp = &data->c_res,
1173 .rpc_cred = data->owner->so_cred,
1175 struct rpc_task_setup task_setup_data = {
1176 .rpc_client = server->client,
1177 .rpc_message = &msg,
1178 .callback_ops = &nfs4_open_confirm_ops,
1179 .callback_data = data,
1180 .workqueue = nfsiod_workqueue,
1181 .flags = RPC_TASK_ASYNC,
1185 kref_get(&data->kref);
1187 data->rpc_status = 0;
1188 data->timestamp = jiffies;
1189 task = rpc_run_task(&task_setup_data);
1191 return PTR_ERR(task);
1192 status = nfs4_wait_for_completion_rpc_task(task);
1194 data->cancelled = 1;
1197 status = data->rpc_status;
1202 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1204 struct nfs4_opendata *data = calldata;
1205 struct nfs4_state_owner *sp = data->owner;
1207 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1210 * Check if we still need to send an OPEN call, or if we can use
1211 * a delegation instead.
1213 if (data->state != NULL) {
1214 struct nfs_delegation *delegation;
1216 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1219 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1220 if (delegation != NULL &&
1221 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1227 /* Update sequence id. */
1228 data->o_arg.id = sp->so_owner_id.id;
1229 data->o_arg.clientid = sp->so_client->cl_clientid;
1230 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1231 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1232 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1234 data->timestamp = jiffies;
1235 rpc_call_start(task);
1238 task->tk_action = NULL;
1242 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1244 struct nfs4_opendata *data = calldata;
1246 data->rpc_status = task->tk_status;
1247 if (RPC_ASSASSINATED(task))
1249 if (task->tk_status == 0) {
1250 switch (data->o_res.f_attr->mode & S_IFMT) {
1254 data->rpc_status = -ELOOP;
1257 data->rpc_status = -EISDIR;
1260 data->rpc_status = -ENOTDIR;
1262 renew_lease(data->o_res.server, data->timestamp);
1263 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1264 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1269 static void nfs4_open_release(void *calldata)
1271 struct nfs4_opendata *data = calldata;
1272 struct nfs4_state *state = NULL;
1274 /* If this request hasn't been cancelled, do nothing */
1275 if (data->cancelled == 0)
1277 /* In case of error, no cleanup! */
1278 if (data->rpc_status != 0 || !data->rpc_done)
1280 /* In case we need an open_confirm, no cleanup! */
1281 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1283 state = nfs4_opendata_to_nfs4_state(data);
1285 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1287 nfs4_opendata_put(data);
1290 static const struct rpc_call_ops nfs4_open_ops = {
1291 .rpc_call_prepare = nfs4_open_prepare,
1292 .rpc_call_done = nfs4_open_done,
1293 .rpc_release = nfs4_open_release,
1297 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1299 static int _nfs4_proc_open(struct nfs4_opendata *data)
1301 struct inode *dir = data->dir->d_inode;
1302 struct nfs_server *server = NFS_SERVER(dir);
1303 struct nfs_openargs *o_arg = &data->o_arg;
1304 struct nfs_openres *o_res = &data->o_res;
1305 struct rpc_task *task;
1306 struct rpc_message msg = {
1307 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1310 .rpc_cred = data->owner->so_cred,
1312 struct rpc_task_setup task_setup_data = {
1313 .rpc_client = server->client,
1314 .rpc_message = &msg,
1315 .callback_ops = &nfs4_open_ops,
1316 .callback_data = data,
1317 .workqueue = nfsiod_workqueue,
1318 .flags = RPC_TASK_ASYNC,
1322 kref_get(&data->kref);
1324 data->rpc_status = 0;
1325 data->cancelled = 0;
1326 task = rpc_run_task(&task_setup_data);
1328 return PTR_ERR(task);
1329 status = nfs4_wait_for_completion_rpc_task(task);
1331 data->cancelled = 1;
1334 status = data->rpc_status;
1336 if (status != 0 || !data->rpc_done)
1339 if (o_res->fh.size == 0)
1340 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1342 if (o_arg->open_flags & O_CREAT) {
1343 update_changeattr(dir, &o_res->cinfo);
1344 nfs_post_op_update_inode(dir, o_res->dir_attr);
1346 nfs_refresh_inode(dir, o_res->dir_attr);
1347 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1348 status = _nfs4_proc_open_confirm(data);
1352 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1353 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1357 static int nfs4_recover_expired_lease(struct nfs_server *server)
1359 struct nfs_client *clp = server->nfs_client;
1363 ret = nfs4_wait_clnt_recover(clp);
1366 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1367 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1369 nfs4_schedule_state_recovery(clp);
1376 * reclaim state on the server after a network partition.
1377 * Assumes caller holds the appropriate lock
1379 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1381 struct nfs4_opendata *opendata;
1384 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1385 if (IS_ERR(opendata))
1386 return PTR_ERR(opendata);
1387 ret = nfs4_open_recover(opendata, state);
1389 d_drop(ctx->path.dentry);
1390 nfs4_opendata_put(opendata);
1394 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1396 struct nfs_server *server = NFS_SERVER(state->inode);
1397 struct nfs4_exception exception = { };
1401 err = _nfs4_open_expired(ctx, state);
1402 if (err != -NFS4ERR_DELAY)
1404 nfs4_handle_exception(server, err, &exception);
1405 } while (exception.retry);
1409 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1411 struct nfs_open_context *ctx;
1414 ctx = nfs4_state_find_open_context(state);
1416 return PTR_ERR(ctx);
1417 ret = nfs4_do_open_expired(ctx, state);
1418 put_nfs_open_context(ctx);
1423 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1424 * fields corresponding to attributes that were used to store the verifier.
1425 * Make sure we clobber those fields in the later setattr call
1427 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1429 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1430 !(sattr->ia_valid & ATTR_ATIME_SET))
1431 sattr->ia_valid |= ATTR_ATIME;
1433 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1434 !(sattr->ia_valid & ATTR_MTIME_SET))
1435 sattr->ia_valid |= ATTR_MTIME;
1439 * Returns a referenced nfs4_state
1441 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)
1443 struct nfs4_state_owner *sp;
1444 struct nfs4_state *state = NULL;
1445 struct nfs_server *server = NFS_SERVER(dir);
1446 struct nfs4_opendata *opendata;
1449 /* Protect against reboot recovery conflicts */
1451 if (!(sp = nfs4_get_state_owner(server, cred))) {
1452 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1455 status = nfs4_recover_expired_lease(server);
1457 goto err_put_state_owner;
1458 if (path->dentry->d_inode != NULL)
1459 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1461 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1462 if (opendata == NULL)
1463 goto err_put_state_owner;
1465 if (path->dentry->d_inode != NULL)
1466 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1468 status = _nfs4_proc_open(opendata);
1470 goto err_opendata_put;
1472 if (opendata->o_arg.open_flags & O_EXCL)
1473 nfs4_exclusive_attrset(opendata, sattr);
1475 state = nfs4_opendata_to_nfs4_state(opendata);
1476 status = PTR_ERR(state);
1478 goto err_opendata_put;
1479 nfs4_opendata_put(opendata);
1480 nfs4_put_state_owner(sp);
1484 nfs4_opendata_put(opendata);
1485 err_put_state_owner:
1486 nfs4_put_state_owner(sp);
1493 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)
1495 struct nfs4_exception exception = { };
1496 struct nfs4_state *res;
1500 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1503 /* NOTE: BAD_SEQID means the server and client disagree about the
1504 * book-keeping w.r.t. state-changing operations
1505 * (OPEN/CLOSE/LOCK/LOCKU...)
1506 * It is actually a sign of a bug on the client or on the server.
1508 * If we receive a BAD_SEQID error in the particular case of
1509 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1510 * have unhashed the old state_owner for us, and that we can
1511 * therefore safely retry using a new one. We should still warn
1512 * the user though...
1514 if (status == -NFS4ERR_BAD_SEQID) {
1515 printk(KERN_WARNING "NFS: v4 server %s "
1516 " returned a bad sequence-id error!\n",
1517 NFS_SERVER(dir)->nfs_client->cl_hostname);
1518 exception.retry = 1;
1522 * BAD_STATEID on OPEN means that the server cancelled our
1523 * state before it received the OPEN_CONFIRM.
1524 * Recover by retrying the request as per the discussion
1525 * on Page 181 of RFC3530.
1527 if (status == -NFS4ERR_BAD_STATEID) {
1528 exception.retry = 1;
1531 if (status == -EAGAIN) {
1532 /* We must have found a delegation */
1533 exception.retry = 1;
1536 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1537 status, &exception));
1538 } while (exception.retry);
1542 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1543 struct nfs_fattr *fattr, struct iattr *sattr,
1544 struct nfs4_state *state)
1546 struct nfs_server *server = NFS_SERVER(inode);
1547 struct nfs_setattrargs arg = {
1548 .fh = NFS_FH(inode),
1551 .bitmask = server->attr_bitmask,
1553 struct nfs_setattrres res = {
1557 struct rpc_message msg = {
1558 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1563 unsigned long timestamp = jiffies;
1566 nfs_fattr_init(fattr);
1568 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1569 /* Use that stateid */
1570 } else if (state != NULL) {
1571 nfs4_copy_stateid(&arg.stateid, state, current->files);
1573 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1575 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1576 if (status == 0 && state != NULL)
1577 renew_lease(server, timestamp);
1581 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1582 struct nfs_fattr *fattr, struct iattr *sattr,
1583 struct nfs4_state *state)
1585 struct nfs_server *server = NFS_SERVER(inode);
1586 struct nfs4_exception exception = { };
1589 err = nfs4_handle_exception(server,
1590 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1592 } while (exception.retry);
1596 struct nfs4_closedata {
1598 struct inode *inode;
1599 struct nfs4_state *state;
1600 struct nfs_closeargs arg;
1601 struct nfs_closeres res;
1602 struct nfs_fattr fattr;
1603 unsigned long timestamp;
1606 static void nfs4_free_closedata(void *data)
1608 struct nfs4_closedata *calldata = data;
1609 struct nfs4_state_owner *sp = calldata->state->owner;
1611 nfs4_put_open_state(calldata->state);
1612 nfs_free_seqid(calldata->arg.seqid);
1613 nfs4_put_state_owner(sp);
1614 path_put(&calldata->path);
1618 static void nfs4_close_done(struct rpc_task *task, void *data)
1620 struct nfs4_closedata *calldata = data;
1621 struct nfs4_state *state = calldata->state;
1622 struct nfs_server *server = NFS_SERVER(calldata->inode);
1624 if (RPC_ASSASSINATED(task))
1626 /* hmm. we are done with the inode, and in the process of freeing
1627 * the state_owner. we keep this around to process errors
1629 switch (task->tk_status) {
1631 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1632 renew_lease(server, calldata->timestamp);
1634 case -NFS4ERR_STALE_STATEID:
1635 case -NFS4ERR_OLD_STATEID:
1636 case -NFS4ERR_BAD_STATEID:
1637 case -NFS4ERR_EXPIRED:
1638 if (calldata->arg.fmode == 0)
1641 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1642 rpc_restart_call(task);
1646 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1649 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1651 struct nfs4_closedata *calldata = data;
1652 struct nfs4_state *state = calldata->state;
1653 int clear_rd, clear_wr, clear_rdwr;
1655 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1658 clear_rd = clear_wr = clear_rdwr = 0;
1659 spin_lock(&state->owner->so_lock);
1660 /* Calculate the change in open mode */
1661 if (state->n_rdwr == 0) {
1662 if (state->n_rdonly == 0) {
1663 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1664 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1666 if (state->n_wronly == 0) {
1667 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1668 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1671 spin_unlock(&state->owner->so_lock);
1672 if (!clear_rd && !clear_wr && !clear_rdwr) {
1673 /* Note: exit _without_ calling nfs4_close_done */
1674 task->tk_action = NULL;
1677 nfs_fattr_init(calldata->res.fattr);
1678 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1679 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1680 calldata->arg.fmode = FMODE_READ;
1681 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1682 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1683 calldata->arg.fmode = FMODE_WRITE;
1685 calldata->timestamp = jiffies;
1686 rpc_call_start(task);
1689 static const struct rpc_call_ops nfs4_close_ops = {
1690 .rpc_call_prepare = nfs4_close_prepare,
1691 .rpc_call_done = nfs4_close_done,
1692 .rpc_release = nfs4_free_closedata,
1696 * It is possible for data to be read/written from a mem-mapped file
1697 * after the sys_close call (which hits the vfs layer as a flush).
1698 * This means that we can't safely call nfsv4 close on a file until
1699 * the inode is cleared. This in turn means that we are not good
1700 * NFSv4 citizens - we do not indicate to the server to update the file's
1701 * share state even when we are done with one of the three share
1702 * stateid's in the inode.
1704 * NOTE: Caller must be holding the sp->so_owner semaphore!
1706 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1708 struct nfs_server *server = NFS_SERVER(state->inode);
1709 struct nfs4_closedata *calldata;
1710 struct nfs4_state_owner *sp = state->owner;
1711 struct rpc_task *task;
1712 struct rpc_message msg = {
1713 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1714 .rpc_cred = state->owner->so_cred,
1716 struct rpc_task_setup task_setup_data = {
1717 .rpc_client = server->client,
1718 .rpc_message = &msg,
1719 .callback_ops = &nfs4_close_ops,
1720 .workqueue = nfsiod_workqueue,
1721 .flags = RPC_TASK_ASYNC,
1723 int status = -ENOMEM;
1725 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1726 if (calldata == NULL)
1728 calldata->inode = state->inode;
1729 calldata->state = state;
1730 calldata->arg.fh = NFS_FH(state->inode);
1731 calldata->arg.stateid = &state->open_stateid;
1732 /* Serialization for the sequence id */
1733 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1734 if (calldata->arg.seqid == NULL)
1735 goto out_free_calldata;
1736 calldata->arg.fmode = 0;
1737 calldata->arg.bitmask = server->cache_consistency_bitmask;
1738 calldata->res.fattr = &calldata->fattr;
1739 calldata->res.seqid = calldata->arg.seqid;
1740 calldata->res.server = server;
1741 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
1742 calldata->path.mnt = mntget(path->mnt);
1743 calldata->path.dentry = dget(path->dentry);
1745 msg.rpc_argp = &calldata->arg,
1746 msg.rpc_resp = &calldata->res,
1747 task_setup_data.callback_data = calldata;
1748 task = rpc_run_task(&task_setup_data);
1750 return PTR_ERR(task);
1753 status = rpc_wait_for_completion_task(task);
1759 nfs4_put_open_state(state);
1760 nfs4_put_state_owner(sp);
1764 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1769 /* If the open_intent is for execute, we have an extra check to make */
1770 if (fmode & FMODE_EXEC) {
1771 ret = nfs_may_open(state->inode,
1772 state->owner->so_cred,
1773 nd->intent.open.flags);
1777 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1778 if (!IS_ERR(filp)) {
1779 struct nfs_open_context *ctx;
1780 ctx = nfs_file_open_context(filp);
1784 ret = PTR_ERR(filp);
1786 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1791 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1793 struct path path = {
1794 .mnt = nd->path.mnt,
1797 struct dentry *parent;
1799 struct rpc_cred *cred;
1800 struct nfs4_state *state;
1802 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1804 if (nd->flags & LOOKUP_CREATE) {
1805 attr.ia_mode = nd->intent.open.create_mode;
1806 attr.ia_valid = ATTR_MODE;
1807 if (!IS_POSIXACL(dir))
1808 attr.ia_mode &= ~current_umask();
1811 BUG_ON(nd->intent.open.flags & O_CREAT);
1814 cred = rpc_lookup_cred();
1816 return (struct dentry *)cred;
1817 parent = dentry->d_parent;
1818 /* Protect against concurrent sillydeletes */
1819 nfs_block_sillyrename(parent);
1820 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1822 if (IS_ERR(state)) {
1823 if (PTR_ERR(state) == -ENOENT) {
1824 d_add(dentry, NULL);
1825 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1827 nfs_unblock_sillyrename(parent);
1828 return (struct dentry *)state;
1830 res = d_add_unique(dentry, igrab(state->inode));
1833 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1834 nfs_unblock_sillyrename(parent);
1835 nfs4_intent_set_file(nd, &path, state, fmode);
1840 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1842 struct path path = {
1843 .mnt = nd->path.mnt,
1846 struct rpc_cred *cred;
1847 struct nfs4_state *state;
1848 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1850 cred = rpc_lookup_cred();
1852 return PTR_ERR(cred);
1853 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1855 if (IS_ERR(state)) {
1856 switch (PTR_ERR(state)) {
1862 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1868 if (state->inode == dentry->d_inode) {
1869 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1870 nfs4_intent_set_file(nd, &path, state, fmode);
1873 nfs4_close_sync(&path, state, fmode);
1879 void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1881 if (ctx->state == NULL)
1884 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1886 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1889 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1891 struct nfs4_server_caps_arg args = {
1894 struct nfs4_server_caps_res res = {};
1895 struct rpc_message msg = {
1896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1902 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1904 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1905 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1906 server->caps |= NFS_CAP_ACLS;
1907 if (res.has_links != 0)
1908 server->caps |= NFS_CAP_HARDLINKS;
1909 if (res.has_symlinks != 0)
1910 server->caps |= NFS_CAP_SYMLINKS;
1911 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
1912 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
1913 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1914 server->acl_bitmask = res.acl_bitmask;
1920 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1922 struct nfs4_exception exception = { };
1925 err = nfs4_handle_exception(server,
1926 _nfs4_server_capabilities(server, fhandle),
1928 } while (exception.retry);
1932 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1933 struct nfs_fsinfo *info)
1935 struct nfs4_lookup_root_arg args = {
1936 .bitmask = nfs4_fattr_bitmap,
1938 struct nfs4_lookup_res res = {
1940 .fattr = info->fattr,
1943 struct rpc_message msg = {
1944 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1948 nfs_fattr_init(info->fattr);
1949 return nfs4_call_sync(server, &msg, &args, &res, 0);
1952 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1953 struct nfs_fsinfo *info)
1955 struct nfs4_exception exception = { };
1958 err = nfs4_handle_exception(server,
1959 _nfs4_lookup_root(server, fhandle, info),
1961 } while (exception.retry);
1966 * get the file handle for the "/" directory on the server
1968 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1969 struct nfs_fsinfo *info)
1973 status = nfs4_lookup_root(server, fhandle, info);
1975 status = nfs4_server_capabilities(server, fhandle);
1977 status = nfs4_do_fsinfo(server, fhandle, info);
1978 return nfs4_map_errors(status);
1982 * Get locations and (maybe) other attributes of a referral.
1983 * Note that we'll actually follow the referral later when
1984 * we detect fsid mismatch in inode revalidation
1986 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1988 int status = -ENOMEM;
1989 struct page *page = NULL;
1990 struct nfs4_fs_locations *locations = NULL;
1992 page = alloc_page(GFP_KERNEL);
1995 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1996 if (locations == NULL)
1999 status = nfs4_proc_fs_locations(dir, name, locations, page);
2002 /* Make sure server returned a different fsid for the referral */
2003 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2004 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2009 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2010 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2012 fattr->mode = S_IFDIR;
2013 memset(fhandle, 0, sizeof(struct nfs_fh));
2022 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2024 struct nfs4_getattr_arg args = {
2026 .bitmask = server->attr_bitmask,
2028 struct nfs4_getattr_res res = {
2032 struct rpc_message msg = {
2033 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2038 nfs_fattr_init(fattr);
2039 return nfs4_call_sync(server, &msg, &args, &res, 0);
2042 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2044 struct nfs4_exception exception = { };
2047 err = nfs4_handle_exception(server,
2048 _nfs4_proc_getattr(server, fhandle, fattr),
2050 } while (exception.retry);
2055 * The file is not closed if it is opened due to the a request to change
2056 * the size of the file. The open call will not be needed once the
2057 * VFS layer lookup-intents are implemented.
2059 * Close is called when the inode is destroyed.
2060 * If we haven't opened the file for O_WRONLY, we
2061 * need to in the size_change case to obtain a stateid.
2064 * Because OPEN is always done by name in nfsv4, it is
2065 * possible that we opened a different file by the same
2066 * name. We can recognize this race condition, but we
2067 * can't do anything about it besides returning an error.
2069 * This will be fixed with VFS changes (lookup-intent).
2072 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2073 struct iattr *sattr)
2075 struct inode *inode = dentry->d_inode;
2076 struct rpc_cred *cred = NULL;
2077 struct nfs4_state *state = NULL;
2080 nfs_fattr_init(fattr);
2082 /* Search for an existing open(O_WRITE) file */
2083 if (sattr->ia_valid & ATTR_FILE) {
2084 struct nfs_open_context *ctx;
2086 ctx = nfs_file_open_context(sattr->ia_file);
2093 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2095 nfs_setattr_update_inode(inode, sattr);
2099 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2100 const struct qstr *name, struct nfs_fh *fhandle,
2101 struct nfs_fattr *fattr)
2104 struct nfs4_lookup_arg args = {
2105 .bitmask = server->attr_bitmask,
2109 struct nfs4_lookup_res res = {
2114 struct rpc_message msg = {
2115 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2120 nfs_fattr_init(fattr);
2122 dprintk("NFS call lookupfh %s\n", name->name);
2123 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2124 dprintk("NFS reply lookupfh: %d\n", status);
2128 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2129 struct qstr *name, struct nfs_fh *fhandle,
2130 struct nfs_fattr *fattr)
2132 struct nfs4_exception exception = { };
2135 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2137 if (err == -NFS4ERR_MOVED) {
2141 err = nfs4_handle_exception(server, err, &exception);
2142 } while (exception.retry);
2146 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2147 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2151 dprintk("NFS call lookup %s\n", name->name);
2152 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2153 if (status == -NFS4ERR_MOVED)
2154 status = nfs4_get_referral(dir, name, fattr, fhandle);
2155 dprintk("NFS reply lookup: %d\n", status);
2159 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2161 struct nfs4_exception exception = { };
2164 err = nfs4_handle_exception(NFS_SERVER(dir),
2165 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2167 } while (exception.retry);
2171 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2173 struct nfs_server *server = NFS_SERVER(inode);
2174 struct nfs_fattr fattr;
2175 struct nfs4_accessargs args = {
2176 .fh = NFS_FH(inode),
2177 .bitmask = server->attr_bitmask,
2179 struct nfs4_accessres res = {
2183 struct rpc_message msg = {
2184 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2187 .rpc_cred = entry->cred,
2189 int mode = entry->mask;
2193 * Determine which access bits we want to ask for...
2195 if (mode & MAY_READ)
2196 args.access |= NFS4_ACCESS_READ;
2197 if (S_ISDIR(inode->i_mode)) {
2198 if (mode & MAY_WRITE)
2199 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2200 if (mode & MAY_EXEC)
2201 args.access |= NFS4_ACCESS_LOOKUP;
2203 if (mode & MAY_WRITE)
2204 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2205 if (mode & MAY_EXEC)
2206 args.access |= NFS4_ACCESS_EXECUTE;
2208 nfs_fattr_init(&fattr);
2209 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2212 if (res.access & NFS4_ACCESS_READ)
2213 entry->mask |= MAY_READ;
2214 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2215 entry->mask |= MAY_WRITE;
2216 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2217 entry->mask |= MAY_EXEC;
2218 nfs_refresh_inode(inode, &fattr);
2223 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2225 struct nfs4_exception exception = { };
2228 err = nfs4_handle_exception(NFS_SERVER(inode),
2229 _nfs4_proc_access(inode, entry),
2231 } while (exception.retry);
2236 * TODO: For the time being, we don't try to get any attributes
2237 * along with any of the zero-copy operations READ, READDIR,
2240 * In the case of the first three, we want to put the GETATTR
2241 * after the read-type operation -- this is because it is hard
2242 * to predict the length of a GETATTR response in v4, and thus
2243 * align the READ data correctly. This means that the GETATTR
2244 * may end up partially falling into the page cache, and we should
2245 * shift it into the 'tail' of the xdr_buf before processing.
2246 * To do this efficiently, we need to know the total length
2247 * of data received, which doesn't seem to be available outside
2250 * In the case of WRITE, we also want to put the GETATTR after
2251 * the operation -- in this case because we want to make sure
2252 * we get the post-operation mtime and size. This means that
2253 * we can't use xdr_encode_pages() as written: we need a variant
2254 * of it which would leave room in the 'tail' iovec.
2256 * Both of these changes to the XDR layer would in fact be quite
2257 * minor, but I decided to leave them for a subsequent patch.
2259 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2260 unsigned int pgbase, unsigned int pglen)
2262 struct nfs4_readlink args = {
2263 .fh = NFS_FH(inode),
2268 struct nfs4_readlink_res res;
2269 struct rpc_message msg = {
2270 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2275 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2278 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2279 unsigned int pgbase, unsigned int pglen)
2281 struct nfs4_exception exception = { };
2284 err = nfs4_handle_exception(NFS_SERVER(inode),
2285 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2287 } while (exception.retry);
2293 * We will need to arrange for the VFS layer to provide an atomic open.
2294 * Until then, this create/open method is prone to inefficiency and race
2295 * conditions due to the lookup, create, and open VFS calls from sys_open()
2296 * placed on the wire.
2298 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2299 * The file will be opened again in the subsequent VFS open call
2300 * (nfs4_proc_file_open).
2302 * The open for read will just hang around to be used by any process that
2303 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2307 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2308 int flags, struct nameidata *nd)
2310 struct path path = {
2311 .mnt = nd->path.mnt,
2314 struct nfs4_state *state;
2315 struct rpc_cred *cred;
2316 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2319 cred = rpc_lookup_cred();
2321 status = PTR_ERR(cred);
2324 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2326 if (IS_ERR(state)) {
2327 status = PTR_ERR(state);
2330 d_add(dentry, igrab(state->inode));
2331 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2332 if (flags & O_EXCL) {
2333 struct nfs_fattr fattr;
2334 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2336 nfs_setattr_update_inode(state->inode, sattr);
2337 nfs_post_op_update_inode(state->inode, &fattr);
2339 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2340 status = nfs4_intent_set_file(nd, &path, state, fmode);
2342 nfs4_close_sync(&path, state, fmode);
2349 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2351 struct nfs_server *server = NFS_SERVER(dir);
2352 struct nfs_removeargs args = {
2354 .name.len = name->len,
2355 .name.name = name->name,
2356 .bitmask = server->attr_bitmask,
2358 struct nfs_removeres res = {
2361 struct rpc_message msg = {
2362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2368 nfs_fattr_init(&res.dir_attr);
2369 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2371 update_changeattr(dir, &res.cinfo);
2372 nfs_post_op_update_inode(dir, &res.dir_attr);
2377 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2379 struct nfs4_exception exception = { };
2382 err = nfs4_handle_exception(NFS_SERVER(dir),
2383 _nfs4_proc_remove(dir, name),
2385 } while (exception.retry);
2389 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2391 struct nfs_server *server = NFS_SERVER(dir);
2392 struct nfs_removeargs *args = msg->rpc_argp;
2393 struct nfs_removeres *res = msg->rpc_resp;
2395 args->bitmask = server->cache_consistency_bitmask;
2396 res->server = server;
2397 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2400 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2402 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2404 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2406 update_changeattr(dir, &res->cinfo);
2407 nfs_post_op_update_inode(dir, &res->dir_attr);
2411 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2412 struct inode *new_dir, struct qstr *new_name)
2414 struct nfs_server *server = NFS_SERVER(old_dir);
2415 struct nfs4_rename_arg arg = {
2416 .old_dir = NFS_FH(old_dir),
2417 .new_dir = NFS_FH(new_dir),
2418 .old_name = old_name,
2419 .new_name = new_name,
2420 .bitmask = server->attr_bitmask,
2422 struct nfs_fattr old_fattr, new_fattr;
2423 struct nfs4_rename_res res = {
2425 .old_fattr = &old_fattr,
2426 .new_fattr = &new_fattr,
2428 struct rpc_message msg = {
2429 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2435 nfs_fattr_init(res.old_fattr);
2436 nfs_fattr_init(res.new_fattr);
2437 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2440 update_changeattr(old_dir, &res.old_cinfo);
2441 nfs_post_op_update_inode(old_dir, res.old_fattr);
2442 update_changeattr(new_dir, &res.new_cinfo);
2443 nfs_post_op_update_inode(new_dir, res.new_fattr);
2448 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2449 struct inode *new_dir, struct qstr *new_name)
2451 struct nfs4_exception exception = { };
2454 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2455 _nfs4_proc_rename(old_dir, old_name,
2458 } while (exception.retry);
2462 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2464 struct nfs_server *server = NFS_SERVER(inode);
2465 struct nfs4_link_arg arg = {
2466 .fh = NFS_FH(inode),
2467 .dir_fh = NFS_FH(dir),
2469 .bitmask = server->attr_bitmask,
2471 struct nfs_fattr fattr, dir_attr;
2472 struct nfs4_link_res res = {
2475 .dir_attr = &dir_attr,
2477 struct rpc_message msg = {
2478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2484 nfs_fattr_init(res.fattr);
2485 nfs_fattr_init(res.dir_attr);
2486 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2488 update_changeattr(dir, &res.cinfo);
2489 nfs_post_op_update_inode(dir, res.dir_attr);
2490 nfs_post_op_update_inode(inode, res.fattr);
2496 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2498 struct nfs4_exception exception = { };
2501 err = nfs4_handle_exception(NFS_SERVER(inode),
2502 _nfs4_proc_link(inode, dir, name),
2504 } while (exception.retry);
2508 struct nfs4_createdata {
2509 struct rpc_message msg;
2510 struct nfs4_create_arg arg;
2511 struct nfs4_create_res res;
2513 struct nfs_fattr fattr;
2514 struct nfs_fattr dir_fattr;
2517 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2518 struct qstr *name, struct iattr *sattr, u32 ftype)
2520 struct nfs4_createdata *data;
2522 data = kzalloc(sizeof(*data), GFP_KERNEL);
2524 struct nfs_server *server = NFS_SERVER(dir);
2526 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2527 data->msg.rpc_argp = &data->arg;
2528 data->msg.rpc_resp = &data->res;
2529 data->arg.dir_fh = NFS_FH(dir);
2530 data->arg.server = server;
2531 data->arg.name = name;
2532 data->arg.attrs = sattr;
2533 data->arg.ftype = ftype;
2534 data->arg.bitmask = server->attr_bitmask;
2535 data->res.server = server;
2536 data->res.fh = &data->fh;
2537 data->res.fattr = &data->fattr;
2538 data->res.dir_fattr = &data->dir_fattr;
2539 nfs_fattr_init(data->res.fattr);
2540 nfs_fattr_init(data->res.dir_fattr);
2545 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2547 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2548 &data->arg, &data->res, 1);
2550 update_changeattr(dir, &data->res.dir_cinfo);
2551 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2552 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2557 static void nfs4_free_createdata(struct nfs4_createdata *data)
2562 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2563 struct page *page, unsigned int len, struct iattr *sattr)
2565 struct nfs4_createdata *data;
2566 int status = -ENAMETOOLONG;
2568 if (len > NFS4_MAXPATHLEN)
2572 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2576 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2577 data->arg.u.symlink.pages = &page;
2578 data->arg.u.symlink.len = len;
2580 status = nfs4_do_create(dir, dentry, data);
2582 nfs4_free_createdata(data);
2587 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2588 struct page *page, unsigned int len, struct iattr *sattr)
2590 struct nfs4_exception exception = { };
2593 err = nfs4_handle_exception(NFS_SERVER(dir),
2594 _nfs4_proc_symlink(dir, dentry, page,
2597 } while (exception.retry);
2601 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2602 struct iattr *sattr)
2604 struct nfs4_createdata *data;
2605 int status = -ENOMEM;
2607 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2611 status = nfs4_do_create(dir, dentry, data);
2613 nfs4_free_createdata(data);
2618 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2619 struct iattr *sattr)
2621 struct nfs4_exception exception = { };
2624 err = nfs4_handle_exception(NFS_SERVER(dir),
2625 _nfs4_proc_mkdir(dir, dentry, sattr),
2627 } while (exception.retry);
2631 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2632 u64 cookie, struct page *page, unsigned int count, int plus)
2634 struct inode *dir = dentry->d_inode;
2635 struct nfs4_readdir_arg args = {
2640 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
2642 struct nfs4_readdir_res res;
2643 struct rpc_message msg = {
2644 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2651 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2652 dentry->d_parent->d_name.name,
2653 dentry->d_name.name,
2654 (unsigned long long)cookie);
2655 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2656 res.pgbase = args.pgbase;
2657 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2659 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2661 nfs_invalidate_atime(dir);
2663 dprintk("%s: returns %d\n", __func__, status);
2667 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2668 u64 cookie, struct page *page, unsigned int count, int plus)
2670 struct nfs4_exception exception = { };
2673 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2674 _nfs4_proc_readdir(dentry, cred, cookie,
2677 } while (exception.retry);
2681 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2682 struct iattr *sattr, dev_t rdev)
2684 struct nfs4_createdata *data;
2685 int mode = sattr->ia_mode;
2686 int status = -ENOMEM;
2688 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2689 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2691 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2696 data->arg.ftype = NF4FIFO;
2697 else if (S_ISBLK(mode)) {
2698 data->arg.ftype = NF4BLK;
2699 data->arg.u.device.specdata1 = MAJOR(rdev);
2700 data->arg.u.device.specdata2 = MINOR(rdev);
2702 else if (S_ISCHR(mode)) {
2703 data->arg.ftype = NF4CHR;
2704 data->arg.u.device.specdata1 = MAJOR(rdev);
2705 data->arg.u.device.specdata2 = MINOR(rdev);
2708 status = nfs4_do_create(dir, dentry, data);
2710 nfs4_free_createdata(data);
2715 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2716 struct iattr *sattr, dev_t rdev)
2718 struct nfs4_exception exception = { };
2721 err = nfs4_handle_exception(NFS_SERVER(dir),
2722 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2724 } while (exception.retry);
2728 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2729 struct nfs_fsstat *fsstat)
2731 struct nfs4_statfs_arg args = {
2733 .bitmask = server->attr_bitmask,
2735 struct nfs4_statfs_res res = {
2738 struct rpc_message msg = {
2739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2744 nfs_fattr_init(fsstat->fattr);
2745 return nfs4_call_sync(server, &msg, &args, &res, 0);
2748 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2750 struct nfs4_exception exception = { };
2753 err = nfs4_handle_exception(server,
2754 _nfs4_proc_statfs(server, fhandle, fsstat),
2756 } while (exception.retry);
2760 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2761 struct nfs_fsinfo *fsinfo)
2763 struct nfs4_fsinfo_arg args = {
2765 .bitmask = server->attr_bitmask,
2767 struct nfs4_fsinfo_res res = {
2770 struct rpc_message msg = {
2771 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2776 return nfs4_call_sync(server, &msg, &args, &res, 0);
2779 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2781 struct nfs4_exception exception = { };
2785 err = nfs4_handle_exception(server,
2786 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2788 } while (exception.retry);
2792 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2794 nfs_fattr_init(fsinfo->fattr);
2795 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2798 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2799 struct nfs_pathconf *pathconf)
2801 struct nfs4_pathconf_arg args = {
2803 .bitmask = server->attr_bitmask,
2805 struct nfs4_pathconf_res res = {
2806 .pathconf = pathconf,
2808 struct rpc_message msg = {
2809 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2814 /* None of the pathconf attributes are mandatory to implement */
2815 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2816 memset(pathconf, 0, sizeof(*pathconf));
2820 nfs_fattr_init(pathconf->fattr);
2821 return nfs4_call_sync(server, &msg, &args, &res, 0);
2824 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2825 struct nfs_pathconf *pathconf)
2827 struct nfs4_exception exception = { };
2831 err = nfs4_handle_exception(server,
2832 _nfs4_proc_pathconf(server, fhandle, pathconf),
2834 } while (exception.retry);
2838 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2840 struct nfs_server *server = NFS_SERVER(data->inode);
2842 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
2843 rpc_restart_call(task);
2847 nfs_invalidate_atime(data->inode);
2848 if (task->tk_status > 0)
2849 renew_lease(server, data->timestamp);
2853 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2855 data->timestamp = jiffies;
2856 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2859 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2861 struct inode *inode = data->inode;
2863 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
2864 rpc_restart_call(task);
2867 if (task->tk_status >= 0) {
2868 renew_lease(NFS_SERVER(inode), data->timestamp);
2869 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
2874 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
2876 struct nfs_server *server = NFS_SERVER(data->inode);
2878 data->args.bitmask = server->cache_consistency_bitmask;
2879 data->res.server = server;
2880 data->timestamp = jiffies;
2882 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
2885 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2887 struct inode *inode = data->inode;
2889 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
2890 rpc_restart_call(task);
2893 nfs_refresh_inode(inode, data->res.fattr);
2897 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
2899 struct nfs_server *server = NFS_SERVER(data->inode);
2901 data->args.bitmask = server->cache_consistency_bitmask;
2902 data->res.server = server;
2903 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
2907 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2908 * standalone procedure for queueing an asynchronous RENEW.
2910 static void nfs4_renew_done(struct rpc_task *task, void *data)
2912 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2913 unsigned long timestamp = (unsigned long)data;
2915 if (task->tk_status < 0) {
2916 /* Unless we're shutting down, schedule state recovery! */
2917 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
2918 nfs4_schedule_state_recovery(clp);
2921 spin_lock(&clp->cl_lock);
2922 if (time_before(clp->cl_last_renewal,timestamp))
2923 clp->cl_last_renewal = timestamp;
2924 spin_unlock(&clp->cl_lock);
2927 static const struct rpc_call_ops nfs4_renew_ops = {
2928 .rpc_call_done = nfs4_renew_done,
2931 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2933 struct rpc_message msg = {
2934 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2939 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2940 &nfs4_renew_ops, (void *)jiffies);
2943 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2945 struct rpc_message msg = {
2946 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2950 unsigned long now = jiffies;
2953 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2956 spin_lock(&clp->cl_lock);
2957 if (time_before(clp->cl_last_renewal,now))
2958 clp->cl_last_renewal = now;
2959 spin_unlock(&clp->cl_lock);
2963 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2965 return (server->caps & NFS_CAP_ACLS)
2966 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2967 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2970 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2971 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2974 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2976 static void buf_to_pages(const void *buf, size_t buflen,
2977 struct page **pages, unsigned int *pgbase)
2979 const void *p = buf;
2981 *pgbase = offset_in_page(buf);
2983 while (p < buf + buflen) {
2984 *(pages++) = virt_to_page(p);
2985 p += PAGE_CACHE_SIZE;
2989 struct nfs4_cached_acl {
2995 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2997 struct nfs_inode *nfsi = NFS_I(inode);
2999 spin_lock(&inode->i_lock);
3000 kfree(nfsi->nfs4_acl);
3001 nfsi->nfs4_acl = acl;
3002 spin_unlock(&inode->i_lock);
3005 static void nfs4_zap_acl_attr(struct inode *inode)
3007 nfs4_set_cached_acl(inode, NULL);
3010 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3012 struct nfs_inode *nfsi = NFS_I(inode);
3013 struct nfs4_cached_acl *acl;
3016 spin_lock(&inode->i_lock);
3017 acl = nfsi->nfs4_acl;
3020 if (buf == NULL) /* user is just asking for length */
3022 if (acl->cached == 0)
3024 ret = -ERANGE; /* see getxattr(2) man page */
3025 if (acl->len > buflen)
3027 memcpy(buf, acl->data, acl->len);
3031 spin_unlock(&inode->i_lock);
3035 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3037 struct nfs4_cached_acl *acl;
3039 if (buf && acl_len <= PAGE_SIZE) {
3040 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3044 memcpy(acl->data, buf, acl_len);
3046 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3053 nfs4_set_cached_acl(inode, acl);
3056 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3058 struct page *pages[NFS4ACL_MAXPAGES];
3059 struct nfs_getaclargs args = {
3060 .fh = NFS_FH(inode),
3064 struct nfs_getaclres res = {
3068 struct rpc_message msg = {
3069 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3073 struct page *localpage = NULL;
3076 if (buflen < PAGE_SIZE) {
3077 /* As long as we're doing a round trip to the server anyway,
3078 * let's be prepared for a page of acl data. */
3079 localpage = alloc_page(GFP_KERNEL);
3080 resp_buf = page_address(localpage);
3081 if (localpage == NULL)
3083 args.acl_pages[0] = localpage;
3084 args.acl_pgbase = 0;
3085 args.acl_len = PAGE_SIZE;
3088 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3090 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3093 if (res.acl_len > args.acl_len)
3094 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3096 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3099 if (res.acl_len > buflen)
3102 memcpy(buf, resp_buf, res.acl_len);
3107 __free_page(localpage);
3111 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3113 struct nfs4_exception exception = { };
3116 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3119 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3120 } while (exception.retry);
3124 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3126 struct nfs_server *server = NFS_SERVER(inode);
3129 if (!nfs4_server_supports_acls(server))
3131 ret = nfs_revalidate_inode(server, inode);
3134 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3135 nfs_zap_acl_cache(inode);
3136 ret = nfs4_read_cached_acl(inode, buf, buflen);
3139 return nfs4_get_acl_uncached(inode, buf, buflen);
3142 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3144 struct nfs_server *server = NFS_SERVER(inode);
3145 struct page *pages[NFS4ACL_MAXPAGES];
3146 struct nfs_setaclargs arg = {
3147 .fh = NFS_FH(inode),
3151 struct nfs_setaclres res;
3152 struct rpc_message msg = {
3153 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3159 if (!nfs4_server_supports_acls(server))
3161 nfs_inode_return_delegation(inode);
3162 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3163 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3164 nfs_access_zap_cache(inode);
3165 nfs_zap_acl_cache(inode);
3169 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3171 struct nfs4_exception exception = { };
3174 err = nfs4_handle_exception(NFS_SERVER(inode),
3175 __nfs4_proc_set_acl(inode, buf, buflen),
3177 } while (exception.retry);
3182 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3184 struct nfs_client *clp = server->nfs_client;
3186 if (!clp || task->tk_status >= 0)
3188 switch(task->tk_status) {
3189 case -NFS4ERR_ADMIN_REVOKED:
3190 case -NFS4ERR_BAD_STATEID:
3191 case -NFS4ERR_OPENMODE:
3194 nfs4_state_mark_reclaim_nograce(clp, state);
3195 case -NFS4ERR_STALE_CLIENTID:
3196 case -NFS4ERR_STALE_STATEID:
3197 case -NFS4ERR_EXPIRED:
3198 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3199 nfs4_schedule_state_recovery(clp);
3200 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3201 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3202 task->tk_status = 0;
3204 case -NFS4ERR_DELAY:
3205 nfs_inc_server_stats(server, NFSIOS_DELAY);
3206 case -NFS4ERR_GRACE:
3207 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3208 task->tk_status = 0;
3210 case -NFS4ERR_OLD_STATEID:
3211 task->tk_status = 0;
3214 task->tk_status = nfs4_map_errors(task->tk_status);
3218 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
3220 nfs4_verifier sc_verifier;
3221 struct nfs4_setclientid setclientid = {
3222 .sc_verifier = &sc_verifier,
3225 struct rpc_message msg = {
3226 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3227 .rpc_argp = &setclientid,
3235 p = (__be32*)sc_verifier.data;
3236 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3237 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3240 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3241 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3243 rpc_peeraddr2str(clp->cl_rpcclient,
3245 rpc_peeraddr2str(clp->cl_rpcclient,
3247 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3248 clp->cl_id_uniquifier);
3249 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3250 sizeof(setclientid.sc_netid),
3251 rpc_peeraddr2str(clp->cl_rpcclient,
3252 RPC_DISPLAY_NETID));
3253 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3254 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3255 clp->cl_ipaddr, port >> 8, port & 255);
3257 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3258 if (status != -NFS4ERR_CLID_INUSE)
3263 ssleep(clp->cl_lease_time + 1);
3265 if (++clp->cl_id_uniquifier == 0)
3271 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3273 struct nfs_fsinfo fsinfo;
3274 struct rpc_message msg = {
3275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3277 .rpc_resp = &fsinfo,
3284 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3286 spin_lock(&clp->cl_lock);
3287 clp->cl_lease_time = fsinfo.lease_time * HZ;
3288 clp->cl_last_renewal = now;
3289 spin_unlock(&clp->cl_lock);
3294 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3299 err = _nfs4_proc_setclientid_confirm(clp, cred);
3303 case -NFS4ERR_RESOURCE:
3304 /* The IBM lawyers misread another document! */
3305 case -NFS4ERR_DELAY:
3306 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3312 struct nfs4_delegreturndata {
3313 struct nfs4_delegreturnargs args;
3314 struct nfs4_delegreturnres res;
3316 nfs4_stateid stateid;
3317 unsigned long timestamp;
3318 struct nfs_fattr fattr;
3322 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3324 struct nfs4_delegreturndata *data = calldata;
3325 data->rpc_status = task->tk_status;
3326 if (data->rpc_status == 0)
3327 renew_lease(data->res.server, data->timestamp);
3330 static void nfs4_delegreturn_release(void *calldata)
3335 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3336 .rpc_call_done = nfs4_delegreturn_done,
3337 .rpc_release = nfs4_delegreturn_release,
3340 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3342 struct nfs4_delegreturndata *data;
3343 struct nfs_server *server = NFS_SERVER(inode);
3344 struct rpc_task *task;
3345 struct rpc_message msg = {
3346 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3349 struct rpc_task_setup task_setup_data = {
3350 .rpc_client = server->client,
3351 .rpc_message = &msg,
3352 .callback_ops = &nfs4_delegreturn_ops,
3353 .flags = RPC_TASK_ASYNC,
3357 data = kmalloc(sizeof(*data), GFP_KERNEL);
3360 data->args.fhandle = &data->fh;
3361 data->args.stateid = &data->stateid;
3362 data->args.bitmask = server->attr_bitmask;
3363 nfs_copy_fh(&data->fh, NFS_FH(inode));
3364 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3365 data->res.fattr = &data->fattr;
3366 data->res.server = server;
3367 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3368 nfs_fattr_init(data->res.fattr);
3369 data->timestamp = jiffies;
3370 data->rpc_status = 0;
3372 task_setup_data.callback_data = data;
3373 msg.rpc_argp = &data->args,
3374 msg.rpc_resp = &data->res,
3375 task = rpc_run_task(&task_setup_data);
3377 return PTR_ERR(task);
3380 status = nfs4_wait_for_completion_rpc_task(task);
3383 status = data->rpc_status;
3386 nfs_refresh_inode(inode, &data->fattr);
3392 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3394 struct nfs_server *server = NFS_SERVER(inode);
3395 struct nfs4_exception exception = { };
3398 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3400 case -NFS4ERR_STALE_STATEID:
3401 case -NFS4ERR_EXPIRED:
3405 err = nfs4_handle_exception(server, err, &exception);
3406 } while (exception.retry);
3410 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3411 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3414 * sleep, with exponential backoff, and retry the LOCK operation.
3416 static unsigned long
3417 nfs4_set_lock_task_retry(unsigned long timeout)
3419 schedule_timeout_killable(timeout);
3421 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3422 return NFS4_LOCK_MAXTIMEOUT;
3426 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3428 struct inode *inode = state->inode;
3429 struct nfs_server *server = NFS_SERVER(inode);
3430 struct nfs_client *clp = server->nfs_client;
3431 struct nfs_lockt_args arg = {
3432 .fh = NFS_FH(inode),
3435 struct nfs_lockt_res res = {
3438 struct rpc_message msg = {
3439 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3442 .rpc_cred = state->owner->so_cred,
3444 struct nfs4_lock_state *lsp;
3447 arg.lock_owner.clientid = clp->cl_clientid;
3448 status = nfs4_set_lock_state(state, request);
3451 lsp = request->fl_u.nfs4_fl.owner;
3452 arg.lock_owner.id = lsp->ls_id.id;
3453 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3456 request->fl_type = F_UNLCK;
3458 case -NFS4ERR_DENIED:
3461 request->fl_ops->fl_release_private(request);
3466 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3468 struct nfs4_exception exception = { };
3472 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3473 _nfs4_proc_getlk(state, cmd, request),
3475 } while (exception.retry);
3479 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3482 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3484 res = posix_lock_file_wait(file, fl);
3487 res = flock_lock_file_wait(file, fl);
3495 struct nfs4_unlockdata {
3496 struct nfs_locku_args arg;
3497 struct nfs_locku_res res;
3498 struct nfs4_lock_state *lsp;
3499 struct nfs_open_context *ctx;
3500 struct file_lock fl;
3501 const struct nfs_server *server;
3502 unsigned long timestamp;
3505 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3506 struct nfs_open_context *ctx,
3507 struct nfs4_lock_state *lsp,
3508 struct nfs_seqid *seqid)
3510 struct nfs4_unlockdata *p;
3511 struct inode *inode = lsp->ls_state->inode;
3513 p = kmalloc(sizeof(*p), GFP_KERNEL);
3516 p->arg.fh = NFS_FH(inode);
3518 p->arg.seqid = seqid;
3519 p->res.seqid = seqid;
3520 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3521 p->arg.stateid = &lsp->ls_stateid;
3523 atomic_inc(&lsp->ls_count);
3524 /* Ensure we don't close file until we're done freeing locks! */
3525 p->ctx = get_nfs_open_context(ctx);
3526 memcpy(&p->fl, fl, sizeof(p->fl));
3527 p->server = NFS_SERVER(inode);
3531 static void nfs4_locku_release_calldata(void *data)
3533 struct nfs4_unlockdata *calldata = data;
3534 nfs_free_seqid(calldata->arg.seqid);
3535 nfs4_put_lock_state(calldata->lsp);
3536 put_nfs_open_context(calldata->ctx);
3540 static void nfs4_locku_done(struct rpc_task *task, void *data)
3542 struct nfs4_unlockdata *calldata = data;
3544 if (RPC_ASSASSINATED(task))
3546 switch (task->tk_status) {
3548 memcpy(calldata->lsp->ls_stateid.data,
3549 calldata->res.stateid.data,
3550 sizeof(calldata->lsp->ls_stateid.data));
3551 renew_lease(calldata->server, calldata->timestamp);
3553 case -NFS4ERR_BAD_STATEID:
3554 case -NFS4ERR_OLD_STATEID:
3555 case -NFS4ERR_STALE_STATEID:
3556 case -NFS4ERR_EXPIRED:
3559 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3560 rpc_restart_call(task);
3564 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3566 struct nfs4_unlockdata *calldata = data;
3568 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3570 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3571 /* Note: exit _without_ running nfs4_locku_done */
3572 task->tk_action = NULL;
3575 calldata->timestamp = jiffies;
3576 rpc_call_start(task);
3579 static const struct rpc_call_ops nfs4_locku_ops = {
3580 .rpc_call_prepare = nfs4_locku_prepare,
3581 .rpc_call_done = nfs4_locku_done,
3582 .rpc_release = nfs4_locku_release_calldata,
3585 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3586 struct nfs_open_context *ctx,
3587 struct nfs4_lock_state *lsp,
3588 struct nfs_seqid *seqid)
3590 struct nfs4_unlockdata *data;
3591 struct rpc_message msg = {
3592 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3593 .rpc_cred = ctx->cred,
3595 struct rpc_task_setup task_setup_data = {
3596 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3597 .rpc_message = &msg,
3598 .callback_ops = &nfs4_locku_ops,
3599 .workqueue = nfsiod_workqueue,
3600 .flags = RPC_TASK_ASYNC,
3603 /* Ensure this is an unlock - when canceling a lock, the
3604 * canceled lock is passed in, and it won't be an unlock.
3606 fl->fl_type = F_UNLCK;
3608 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3610 nfs_free_seqid(seqid);
3611 return ERR_PTR(-ENOMEM);
3614 msg.rpc_argp = &data->arg,
3615 msg.rpc_resp = &data->res,
3616 task_setup_data.callback_data = data;
3617 return rpc_run_task(&task_setup_data);
3620 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3622 struct nfs_inode *nfsi = NFS_I(state->inode);
3623 struct nfs_seqid *seqid;
3624 struct nfs4_lock_state *lsp;
3625 struct rpc_task *task;
3627 unsigned char fl_flags = request->fl_flags;
3629 status = nfs4_set_lock_state(state, request);
3630 /* Unlock _before_ we do the RPC call */
3631 request->fl_flags |= FL_EXISTS;
3632 down_read(&nfsi->rwsem);
3633 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3634 up_read(&nfsi->rwsem);
3637 up_read(&nfsi->rwsem);
3640 /* Is this a delegated lock? */
3641 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3643 lsp = request->fl_u.nfs4_fl.owner;
3644 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3648 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3649 status = PTR_ERR(task);
3652 status = nfs4_wait_for_completion_rpc_task(task);
3655 request->fl_flags = fl_flags;
3659 struct nfs4_lockdata {
3660 struct nfs_lock_args arg;
3661 struct nfs_lock_res res;
3662 struct nfs4_lock_state *lsp;
3663 struct nfs_open_context *ctx;
3664 struct file_lock fl;
3665 unsigned long timestamp;
3670 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3671 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3673 struct nfs4_lockdata *p;
3674 struct inode *inode = lsp->ls_state->inode;
3675 struct nfs_server *server = NFS_SERVER(inode);
3677 p = kzalloc(sizeof(*p), GFP_KERNEL);
3681 p->arg.fh = NFS_FH(inode);
3683 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3684 if (p->arg.open_seqid == NULL)
3686 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3687 if (p->arg.lock_seqid == NULL)
3688 goto out_free_seqid;
3689 p->arg.lock_stateid = &lsp->ls_stateid;
3690 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3691 p->arg.lock_owner.id = lsp->ls_id.id;
3692 p->res.lock_seqid = p->arg.lock_seqid;
3693 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3695 atomic_inc(&lsp->ls_count);
3696 p->ctx = get_nfs_open_context(ctx);
3697 memcpy(&p->fl, fl, sizeof(p->fl));
3700 nfs_free_seqid(p->arg.open_seqid);
3706 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3708 struct nfs4_lockdata *data = calldata;
3709 struct nfs4_state *state = data->lsp->ls_state;
3711 dprintk("%s: begin!\n", __func__);
3712 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3714 /* Do we need to do an open_to_lock_owner? */
3715 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3716 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3718 data->arg.open_stateid = &state->stateid;
3719 data->arg.new_lock_owner = 1;
3720 data->res.open_seqid = data->arg.open_seqid;
3722 data->arg.new_lock_owner = 0;
3723 data->timestamp = jiffies;
3724 rpc_call_start(task);
3725 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3728 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3730 struct nfs4_lockdata *data = calldata;
3732 dprintk("%s: begin!\n", __func__);
3734 data->rpc_status = task->tk_status;
3735 if (RPC_ASSASSINATED(task))
3737 if (data->arg.new_lock_owner != 0) {
3738 if (data->rpc_status == 0)
3739 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3743 if (data->rpc_status == 0) {
3744 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3745 sizeof(data->lsp->ls_stateid.data));
3746 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3747 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3750 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3753 static void nfs4_lock_release(void *calldata)
3755 struct nfs4_lockdata *data = calldata;
3757 dprintk("%s: begin!\n", __func__);
3758 nfs_free_seqid(data->arg.open_seqid);
3759 if (data->cancelled != 0) {
3760 struct rpc_task *task;
3761 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3762 data->arg.lock_seqid);
3765 dprintk("%s: cancelling lock!\n", __func__);
3767 nfs_free_seqid(data->arg.lock_seqid);
3768 nfs4_put_lock_state(data->lsp);
3769 put_nfs_open_context(data->ctx);
3771 dprintk("%s: done!\n", __func__);
3774 static const struct rpc_call_ops nfs4_lock_ops = {
3775 .rpc_call_prepare = nfs4_lock_prepare,
3776 .rpc_call_done = nfs4_lock_done,
3777 .rpc_release = nfs4_lock_release,
3780 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3782 struct nfs4_lockdata *data;
3783 struct rpc_task *task;
3784 struct rpc_message msg = {
3785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3786 .rpc_cred = state->owner->so_cred,
3788 struct rpc_task_setup task_setup_data = {
3789 .rpc_client = NFS_CLIENT(state->inode),
3790 .rpc_message = &msg,
3791 .callback_ops = &nfs4_lock_ops,
3792 .workqueue = nfsiod_workqueue,
3793 .flags = RPC_TASK_ASYNC,
3797 dprintk("%s: begin!\n", __func__);
3798 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3799 fl->fl_u.nfs4_fl.owner);
3803 data->arg.block = 1;
3805 data->arg.reclaim = 1;
3806 msg.rpc_argp = &data->arg,
3807 msg.rpc_resp = &data->res,
3808 task_setup_data.callback_data = data;
3809 task = rpc_run_task(&task_setup_data);
3811 return PTR_ERR(task);
3812 ret = nfs4_wait_for_completion_rpc_task(task);
3814 ret = data->rpc_status;
3815 if (ret == -NFS4ERR_DENIED)
3818 data->cancelled = 1;
3820 dprintk("%s: done, ret = %d!\n", __func__, ret);
3824 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3826 struct nfs_server *server = NFS_SERVER(state->inode);
3827 struct nfs4_exception exception = { };
3831 /* Cache the lock if possible... */
3832 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3834 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3835 if (err != -NFS4ERR_DELAY)
3837 nfs4_handle_exception(server, err, &exception);
3838 } while (exception.retry);
3842 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3844 struct nfs_server *server = NFS_SERVER(state->inode);
3845 struct nfs4_exception exception = { };
3848 err = nfs4_set_lock_state(state, request);
3852 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3854 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3855 if (err != -NFS4ERR_DELAY)
3857 nfs4_handle_exception(server, err, &exception);
3858 } while (exception.retry);
3862 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3864 struct nfs_inode *nfsi = NFS_I(state->inode);
3865 unsigned char fl_flags = request->fl_flags;
3868 /* Is this a delegated open? */
3869 status = nfs4_set_lock_state(state, request);
3872 request->fl_flags |= FL_ACCESS;
3873 status = do_vfs_lock(request->fl_file, request);
3876 down_read(&nfsi->rwsem);
3877 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3878 /* Yes: cache locks! */
3879 /* ...but avoid races with delegation recall... */
3880 request->fl_flags = fl_flags & ~FL_SLEEP;
3881 status = do_vfs_lock(request->fl_file, request);
3884 status = _nfs4_do_setlk(state, cmd, request, 0);
3887 /* Note: we always want to sleep here! */
3888 request->fl_flags = fl_flags | FL_SLEEP;
3889 if (do_vfs_lock(request->fl_file, request) < 0)
3890 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
3892 up_read(&nfsi->rwsem);
3894 request->fl_flags = fl_flags;
3898 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3900 struct nfs4_exception exception = { };
3904 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3905 _nfs4_proc_setlk(state, cmd, request),
3907 } while (exception.retry);
3912 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3914 struct nfs_open_context *ctx;
3915 struct nfs4_state *state;
3916 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3919 /* verify open state */
3920 ctx = nfs_file_open_context(filp);
3923 if (request->fl_start < 0 || request->fl_end < 0)
3927 return nfs4_proc_getlk(state, F_GETLK, request);
3929 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3932 if (request->fl_type == F_UNLCK)
3933 return nfs4_proc_unlck(state, cmd, request);
3936 status = nfs4_proc_setlk(state, cmd, request);
3937 if ((status != -EAGAIN) || IS_SETLK(cmd))
3939 timeout = nfs4_set_lock_task_retry(timeout);
3940 status = -ERESTARTSYS;
3943 } while(status < 0);
3947 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3949 struct nfs_server *server = NFS_SERVER(state->inode);
3950 struct nfs4_exception exception = { };
3953 err = nfs4_set_lock_state(state, fl);
3957 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3958 if (err != -NFS4ERR_DELAY)
3960 err = nfs4_handle_exception(server, err, &exception);
3961 } while (exception.retry);
3966 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3968 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3969 size_t buflen, int flags)
3971 struct inode *inode = dentry->d_inode;
3973 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3976 return nfs4_proc_set_acl(inode, buf, buflen);
3979 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3980 * and that's what we'll do for e.g. user attributes that haven't been set.
3981 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3982 * attributes in kernel-managed attribute namespaces. */
3983 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3986 struct inode *inode = dentry->d_inode;
3988 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3991 return nfs4_proc_get_acl(inode, buf, buflen);
3994 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3996 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3998 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4000 if (buf && buflen < len)
4003 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4007 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4009 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4010 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4011 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4014 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4015 NFS_ATTR_FATTR_NLINK;
4016 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4020 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4021 struct nfs4_fs_locations *fs_locations, struct page *page)
4023 struct nfs_server *server = NFS_SERVER(dir);
4025 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4026 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4028 struct nfs4_fs_locations_arg args = {
4029 .dir_fh = NFS_FH(dir),
4034 struct nfs4_fs_locations_res res = {
4035 .fs_locations = fs_locations,
4037 struct rpc_message msg = {
4038 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4044 dprintk("%s: start\n", __func__);
4045 nfs_fattr_init(&fs_locations->fattr);
4046 fs_locations->server = server;
4047 fs_locations->nlocations = 0;
4048 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4049 nfs_fixup_referral_attributes(&fs_locations->fattr);
4050 dprintk("%s: returned status = %d\n", __func__, status);
4054 #ifdef CONFIG_NFS_V4_1
4055 /* Destroy the slot table */
4056 static void nfs4_destroy_slot_table(struct nfs4_session *session)
4058 if (session->fc_slot_table.slots == NULL)
4060 kfree(session->fc_slot_table.slots);
4061 session->fc_slot_table.slots = NULL;
4065 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4067 struct nfs4_session *session;
4068 struct nfs4_slot_table *tbl;
4070 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4073 tbl = &session->fc_slot_table;
4074 spin_lock_init(&tbl->slot_tbl_lock);
4075 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table");
4080 void nfs4_destroy_session(struct nfs4_session *session)
4082 nfs4_destroy_slot_table(session);
4086 #endif /* CONFIG_NFS_V4_1 */
4088 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
4089 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4090 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4091 .recover_open = nfs4_open_reclaim,
4092 .recover_lock = nfs4_lock_reclaim,
4095 struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
4096 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4097 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4098 .recover_open = nfs4_open_expired,
4099 .recover_lock = nfs4_lock_expired,
4102 static const struct inode_operations nfs4_file_inode_operations = {
4103 .permission = nfs_permission,
4104 .getattr = nfs_getattr,
4105 .setattr = nfs_setattr,
4106 .getxattr = nfs4_getxattr,
4107 .setxattr = nfs4_setxattr,
4108 .listxattr = nfs4_listxattr,
4111 const struct nfs_rpc_ops nfs_v4_clientops = {
4112 .version = 4, /* protocol version */
4113 .dentry_ops = &nfs4_dentry_operations,
4114 .dir_inode_ops = &nfs4_dir_inode_operations,
4115 .file_inode_ops = &nfs4_file_inode_operations,
4116 .getroot = nfs4_proc_get_root,
4117 .getattr = nfs4_proc_getattr,
4118 .setattr = nfs4_proc_setattr,
4119 .lookupfh = nfs4_proc_lookupfh,
4120 .lookup = nfs4_proc_lookup,
4121 .access = nfs4_proc_access,
4122 .readlink = nfs4_proc_readlink,
4123 .create = nfs4_proc_create,
4124 .remove = nfs4_proc_remove,
4125 .unlink_setup = nfs4_proc_unlink_setup,
4126 .unlink_done = nfs4_proc_unlink_done,
4127 .rename = nfs4_proc_rename,
4128 .link = nfs4_proc_link,
4129 .symlink = nfs4_proc_symlink,
4130 .mkdir = nfs4_proc_mkdir,
4131 .rmdir = nfs4_proc_remove,
4132 .readdir = nfs4_proc_readdir,
4133 .mknod = nfs4_proc_mknod,
4134 .statfs = nfs4_proc_statfs,
4135 .fsinfo = nfs4_proc_fsinfo,
4136 .pathconf = nfs4_proc_pathconf,
4137 .set_capabilities = nfs4_server_capabilities,
4138 .decode_dirent = nfs4_decode_dirent,
4139 .read_setup = nfs4_proc_read_setup,
4140 .read_done = nfs4_read_done,
4141 .write_setup = nfs4_proc_write_setup,
4142 .write_done = nfs4_write_done,
4143 .commit_setup = nfs4_proc_commit_setup,
4144 .commit_done = nfs4_commit_done,
4145 .lock = nfs4_proc_lock,
4146 .clear_acl_cache = nfs4_zap_acl_attr,
4147 .close_context = nfs4_close_context,