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>
51 #include <linux/module.h>
54 #include "delegation.h"
59 #define NFSDBG_FACILITY NFSDBG_PROC
61 #define NFS4_POLL_RETRY_MIN (HZ/10)
62 #define NFS4_POLL_RETRY_MAX (15*HZ)
65 static int _nfs4_proc_open(struct nfs4_opendata *data);
66 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
67 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
68 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
69 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
71 /* Prevent leaks of NFSv4 errors into userland */
72 static int nfs4_map_errors(int err)
75 dprintk("%s could not handle NFSv4 error %d\n",
83 * This is our standard bitmap for GETATTR requests.
85 const u32 nfs4_fattr_bitmap[2] = {
90 | FATTR4_WORD0_FILEID,
92 | FATTR4_WORD1_NUMLINKS
94 | FATTR4_WORD1_OWNER_GROUP
96 | FATTR4_WORD1_SPACE_USED
97 | FATTR4_WORD1_TIME_ACCESS
98 | FATTR4_WORD1_TIME_METADATA
99 | FATTR4_WORD1_TIME_MODIFY
102 const u32 nfs4_statfs_bitmap[2] = {
103 FATTR4_WORD0_FILES_AVAIL
104 | FATTR4_WORD0_FILES_FREE
105 | FATTR4_WORD0_FILES_TOTAL,
106 FATTR4_WORD1_SPACE_AVAIL
107 | FATTR4_WORD1_SPACE_FREE
108 | FATTR4_WORD1_SPACE_TOTAL
111 const u32 nfs4_pathconf_bitmap[2] = {
113 | FATTR4_WORD0_MAXNAME,
117 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
118 | FATTR4_WORD0_MAXREAD
119 | FATTR4_WORD0_MAXWRITE
120 | FATTR4_WORD0_LEASE_TIME,
124 const u32 nfs4_fs_locations_bitmap[2] = {
126 | FATTR4_WORD0_CHANGE
129 | FATTR4_WORD0_FILEID
130 | FATTR4_WORD0_FS_LOCATIONS,
132 | FATTR4_WORD1_NUMLINKS
134 | FATTR4_WORD1_OWNER_GROUP
135 | FATTR4_WORD1_RAWDEV
136 | FATTR4_WORD1_SPACE_USED
137 | FATTR4_WORD1_TIME_ACCESS
138 | FATTR4_WORD1_TIME_METADATA
139 | FATTR4_WORD1_TIME_MODIFY
140 | FATTR4_WORD1_MOUNTED_ON_FILEID
143 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
144 struct nfs4_readdir_arg *readdir)
148 BUG_ON(readdir->count < 80);
150 readdir->cookie = cookie;
151 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
156 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
161 * NFSv4 servers do not return entries for '.' and '..'
162 * Therefore, we fake these entries here. We let '.'
163 * have cookie 0 and '..' have cookie 1. Note that
164 * when talking to the server, we always send cookie 0
167 start = p = kmap_atomic(*readdir->pages, KM_USER0);
170 *p++ = xdr_one; /* next */
171 *p++ = xdr_zero; /* cookie, first word */
172 *p++ = xdr_one; /* cookie, second word */
173 *p++ = xdr_one; /* entry len */
174 memcpy(p, ".\0\0\0", 4); /* entry */
176 *p++ = xdr_one; /* bitmap length */
177 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
178 *p++ = htonl(8); /* attribute buffer length */
179 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
182 *p++ = xdr_one; /* next */
183 *p++ = xdr_zero; /* cookie, first word */
184 *p++ = xdr_two; /* cookie, second word */
185 *p++ = xdr_two; /* entry len */
186 memcpy(p, "..\0\0", 4); /* entry */
188 *p++ = xdr_one; /* bitmap length */
189 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
190 *p++ = htonl(8); /* attribute buffer length */
191 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
193 readdir->pgbase = (char *)p - (char *)start;
194 readdir->count -= readdir->pgbase;
195 kunmap_atomic(start, KM_USER0);
198 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
204 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
205 nfs_wait_bit_killable, TASK_KILLABLE);
209 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
216 *timeout = NFS4_POLL_RETRY_MIN;
217 if (*timeout > NFS4_POLL_RETRY_MAX)
218 *timeout = NFS4_POLL_RETRY_MAX;
219 schedule_timeout_killable(*timeout);
220 if (fatal_signal_pending(current))
226 /* This is the error handling routine for processes that are allowed
229 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
231 struct nfs_client *clp = server->nfs_client;
232 struct nfs4_state *state = exception->state;
235 exception->retry = 0;
239 case -NFS4ERR_ADMIN_REVOKED:
240 case -NFS4ERR_BAD_STATEID:
241 case -NFS4ERR_OPENMODE:
244 nfs4_state_mark_reclaim_nograce(clp, state);
245 case -NFS4ERR_STALE_CLIENTID:
246 case -NFS4ERR_STALE_STATEID:
247 case -NFS4ERR_EXPIRED:
248 nfs4_schedule_state_recovery(clp);
249 ret = nfs4_wait_clnt_recover(clp);
251 exception->retry = 1;
253 case -NFS4ERR_FILE_OPEN:
256 ret = nfs4_delay(server->client, &exception->timeout);
259 case -NFS4ERR_OLD_STATEID:
260 exception->retry = 1;
262 /* We failed to handle the error */
263 return nfs4_map_errors(ret);
267 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
269 struct nfs_client *clp = server->nfs_client;
270 spin_lock(&clp->cl_lock);
271 if (time_before(clp->cl_last_renewal,timestamp))
272 clp->cl_last_renewal = timestamp;
273 spin_unlock(&clp->cl_lock);
276 #if defined(CONFIG_NFS_V4_1)
279 * nfs4_free_slot - free a slot and efficiently update slot table.
281 * freeing a slot is trivially done by clearing its respective bit
283 * If the freed slotid equals highest_used_slotid we want to update it
284 * so that the server would be able to size down the slot table if needed,
285 * otherwise we know that the highest_used_slotid is still in use.
286 * When updating highest_used_slotid there may be "holes" in the bitmap
287 * so we need to scan down from highest_used_slotid to 0 looking for the now
288 * highest slotid in use.
289 * If none found, highest_used_slotid is set to -1.
292 nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
294 int slotid = free_slotid;
296 spin_lock(&tbl->slot_tbl_lock);
297 /* clear used bit in bitmap */
298 __clear_bit(slotid, tbl->used_slots);
300 /* update highest_used_slotid when it is freed */
301 if (slotid == tbl->highest_used_slotid) {
302 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
303 if (slotid >= 0 && slotid < tbl->max_slots)
304 tbl->highest_used_slotid = slotid;
306 tbl->highest_used_slotid = -1;
308 rpc_wake_up_next(&tbl->slot_tbl_waitq);
309 spin_unlock(&tbl->slot_tbl_lock);
310 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
311 free_slotid, tbl->highest_used_slotid);
314 void nfs41_sequence_free_slot(const struct nfs_client *clp,
315 struct nfs4_sequence_res *res)
317 struct nfs4_slot_table *tbl;
319 if (!nfs4_has_session(clp)) {
320 dprintk("%s: No session\n", __func__);
323 tbl = &clp->cl_session->fc_slot_table;
324 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
325 dprintk("%s: No slot\n", __func__);
326 /* just wake up the next guy waiting since
327 * we may have not consumed a slot after all */
328 rpc_wake_up_next(&tbl->slot_tbl_waitq);
331 nfs4_free_slot(tbl, res->sr_slotid);
332 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
335 static void nfs41_sequence_done(struct nfs_client *clp,
336 struct nfs4_sequence_res *res,
339 unsigned long timestamp;
340 struct nfs4_slot_table *tbl;
341 struct nfs4_slot *slot;
344 * sr_status remains 1 if an RPC level error occurred. The server
345 * may or may not have processed the sequence operation..
346 * Proceed as if the server received and processed the sequence
349 if (res->sr_status == 1)
350 res->sr_status = NFS_OK;
352 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
353 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
356 tbl = &clp->cl_session->fc_slot_table;
357 slot = tbl->slots + res->sr_slotid;
359 if (res->sr_status == 0) {
360 /* Update the slot's sequence and clientid lease timer */
362 timestamp = res->sr_renewal_time;
363 spin_lock(&clp->cl_lock);
364 if (time_before(clp->cl_last_renewal, timestamp))
365 clp->cl_last_renewal = timestamp;
366 spin_unlock(&clp->cl_lock);
370 /* The session may be reset by one of the error handlers. */
371 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
372 nfs41_sequence_free_slot(clp, res);
376 * nfs4_find_slot - efficiently look for a free slot
378 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
379 * If found, we mark the slot as used, update the highest_used_slotid,
380 * and respectively set up the sequence operation args.
381 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
383 * Note: must be called with under the slot_tbl_lock.
386 nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
389 u8 ret_id = NFS4_MAX_SLOT_TABLE;
390 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
392 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
393 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
395 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
396 if (slotid >= tbl->max_slots)
398 __set_bit(slotid, tbl->used_slots);
399 if (slotid > tbl->highest_used_slotid)
400 tbl->highest_used_slotid = slotid;
403 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
404 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
408 static int nfs41_setup_sequence(struct nfs4_session *session,
409 struct nfs4_sequence_args *args,
410 struct nfs4_sequence_res *res,
412 struct rpc_task *task)
414 struct nfs4_slot *slot;
415 struct nfs4_slot_table *tbl;
418 dprintk("--> %s\n", __func__);
419 /* slot already allocated? */
420 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
423 memset(res, 0, sizeof(*res));
424 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
425 tbl = &session->fc_slot_table;
427 spin_lock(&tbl->slot_tbl_lock);
428 slotid = nfs4_find_slot(tbl, task);
429 if (slotid == NFS4_MAX_SLOT_TABLE) {
430 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
431 spin_unlock(&tbl->slot_tbl_lock);
432 dprintk("<-- %s: no free slots\n", __func__);
435 spin_unlock(&tbl->slot_tbl_lock);
437 slot = tbl->slots + slotid;
438 args->sa_session = session;
439 args->sa_slotid = slotid;
440 args->sa_cache_this = cache_reply;
442 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
444 res->sr_session = session;
445 res->sr_slotid = slotid;
446 res->sr_renewal_time = jiffies;
448 * sr_status is only set in decode_sequence, and so will remain
449 * set to 1 if an rpc level failure occurs.
455 int nfs4_setup_sequence(struct nfs_client *clp,
456 struct nfs4_sequence_args *args,
457 struct nfs4_sequence_res *res,
459 struct rpc_task *task)
463 dprintk("--> %s clp %p session %p sr_slotid %d\n",
464 __func__, clp, clp->cl_session, res->sr_slotid);
466 if (!nfs4_has_session(clp))
468 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
470 if (ret != -EAGAIN) {
471 /* terminate rpc task */
472 task->tk_status = ret;
473 task->tk_action = NULL;
476 dprintk("<-- %s status=%d\n", __func__, ret);
480 struct nfs41_call_sync_data {
481 struct nfs_client *clp;
482 struct nfs4_sequence_args *seq_args;
483 struct nfs4_sequence_res *seq_res;
487 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
489 struct nfs41_call_sync_data *data = calldata;
491 dprintk("--> %s data->clp->cl_session %p\n", __func__,
492 data->clp->cl_session);
493 if (nfs4_setup_sequence(data->clp, data->seq_args,
494 data->seq_res, data->cache_reply, task))
496 rpc_call_start(task);
499 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
501 struct nfs41_call_sync_data *data = calldata;
503 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
504 nfs41_sequence_free_slot(data->clp, data->seq_res);
507 struct rpc_call_ops nfs41_call_sync_ops = {
508 .rpc_call_prepare = nfs41_call_sync_prepare,
509 .rpc_call_done = nfs41_call_sync_done,
512 static int nfs4_call_sync_sequence(struct nfs_client *clp,
513 struct rpc_clnt *clnt,
514 struct rpc_message *msg,
515 struct nfs4_sequence_args *args,
516 struct nfs4_sequence_res *res,
520 struct rpc_task *task;
521 struct nfs41_call_sync_data data = {
525 .cache_reply = cache_reply,
527 struct rpc_task_setup task_setup = {
530 .callback_ops = &nfs41_call_sync_ops,
531 .callback_data = &data
534 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
535 task = rpc_run_task(&task_setup);
539 ret = task->tk_status;
545 int _nfs4_call_sync_session(struct nfs_server *server,
546 struct rpc_message *msg,
547 struct nfs4_sequence_args *args,
548 struct nfs4_sequence_res *res,
551 return nfs4_call_sync_sequence(server->nfs_client, server->client,
552 msg, args, res, cache_reply);
555 #endif /* CONFIG_NFS_V4_1 */
557 int _nfs4_call_sync(struct nfs_server *server,
558 struct rpc_message *msg,
559 struct nfs4_sequence_args *args,
560 struct nfs4_sequence_res *res,
563 args->sa_session = res->sr_session = NULL;
564 return rpc_call_sync(server->client, msg, 0);
567 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
568 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
569 &(res)->seq_res, (cache_reply))
571 static void nfs4_sequence_done(const struct nfs_server *server,
572 struct nfs4_sequence_res *res, int rpc_status)
574 #ifdef CONFIG_NFS_V4_1
575 if (nfs4_has_session(server->nfs_client))
576 nfs41_sequence_done(server->nfs_client, res, rpc_status);
577 #endif /* CONFIG_NFS_V4_1 */
580 /* no restart, therefore free slot here */
581 static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
582 struct nfs4_sequence_res *res,
585 nfs4_sequence_done(server, res, rpc_status);
586 nfs4_sequence_free_slot(server->nfs_client, res);
589 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
591 struct nfs_inode *nfsi = NFS_I(dir);
593 spin_lock(&dir->i_lock);
594 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
595 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
596 nfs_force_lookup_revalidate(dir);
597 nfsi->change_attr = cinfo->after;
598 spin_unlock(&dir->i_lock);
601 struct nfs4_opendata {
603 struct nfs_openargs o_arg;
604 struct nfs_openres o_res;
605 struct nfs_open_confirmargs c_arg;
606 struct nfs_open_confirmres c_res;
607 struct nfs_fattr f_attr;
608 struct nfs_fattr dir_attr;
611 struct nfs4_state_owner *owner;
612 struct nfs4_state *state;
614 unsigned long timestamp;
615 unsigned int rpc_done : 1;
621 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
623 p->o_res.f_attr = &p->f_attr;
624 p->o_res.dir_attr = &p->dir_attr;
625 p->o_res.seqid = p->o_arg.seqid;
626 p->c_res.seqid = p->c_arg.seqid;
627 p->o_res.server = p->o_arg.server;
628 nfs_fattr_init(&p->f_attr);
629 nfs_fattr_init(&p->dir_attr);
632 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
633 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
634 const struct iattr *attrs)
636 struct dentry *parent = dget_parent(path->dentry);
637 struct inode *dir = parent->d_inode;
638 struct nfs_server *server = NFS_SERVER(dir);
639 struct nfs4_opendata *p;
641 p = kzalloc(sizeof(*p), GFP_KERNEL);
644 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
645 if (p->o_arg.seqid == NULL)
647 p->path.mnt = mntget(path->mnt);
648 p->path.dentry = dget(path->dentry);
651 atomic_inc(&sp->so_count);
652 p->o_arg.fh = NFS_FH(dir);
653 p->o_arg.open_flags = flags;
654 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
655 p->o_arg.clientid = server->nfs_client->cl_clientid;
656 p->o_arg.id = sp->so_owner_id.id;
657 p->o_arg.name = &p->path.dentry->d_name;
658 p->o_arg.server = server;
659 p->o_arg.bitmask = server->attr_bitmask;
660 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
661 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
662 if (flags & O_EXCL) {
663 u32 *s = (u32 *) p->o_arg.u.verifier.data;
666 } else if (flags & O_CREAT) {
667 p->o_arg.u.attrs = &p->attrs;
668 memcpy(&p->attrs, attrs, sizeof(p->attrs));
670 p->c_arg.fh = &p->o_res.fh;
671 p->c_arg.stateid = &p->o_res.stateid;
672 p->c_arg.seqid = p->o_arg.seqid;
673 nfs4_init_opendata_res(p);
683 static void nfs4_opendata_free(struct kref *kref)
685 struct nfs4_opendata *p = container_of(kref,
686 struct nfs4_opendata, kref);
688 nfs_free_seqid(p->o_arg.seqid);
689 if (p->state != NULL)
690 nfs4_put_open_state(p->state);
691 nfs4_put_state_owner(p->owner);
697 static void nfs4_opendata_put(struct nfs4_opendata *p)
700 kref_put(&p->kref, nfs4_opendata_free);
703 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
707 ret = rpc_wait_for_completion_task(task);
711 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
715 if (open_mode & O_EXCL)
717 switch (mode & (FMODE_READ|FMODE_WRITE)) {
719 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
722 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
724 case FMODE_READ|FMODE_WRITE:
725 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
731 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
733 if ((delegation->type & fmode) != fmode)
735 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
737 nfs_mark_delegation_referenced(delegation);
741 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
750 case FMODE_READ|FMODE_WRITE:
753 nfs4_state_set_mode_locked(state, state->state | fmode);
756 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
758 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
759 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
760 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
763 set_bit(NFS_O_RDONLY_STATE, &state->flags);
766 set_bit(NFS_O_WRONLY_STATE, &state->flags);
768 case FMODE_READ|FMODE_WRITE:
769 set_bit(NFS_O_RDWR_STATE, &state->flags);
773 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
775 write_seqlock(&state->seqlock);
776 nfs_set_open_stateid_locked(state, stateid, fmode);
777 write_sequnlock(&state->seqlock);
780 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
783 * Protect the call to nfs4_state_set_mode_locked and
784 * serialise the stateid update
786 write_seqlock(&state->seqlock);
787 if (deleg_stateid != NULL) {
788 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
789 set_bit(NFS_DELEGATED_STATE, &state->flags);
791 if (open_stateid != NULL)
792 nfs_set_open_stateid_locked(state, open_stateid, fmode);
793 write_sequnlock(&state->seqlock);
794 spin_lock(&state->owner->so_lock);
795 update_open_stateflags(state, fmode);
796 spin_unlock(&state->owner->so_lock);
799 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
801 struct nfs_inode *nfsi = NFS_I(state->inode);
802 struct nfs_delegation *deleg_cur;
805 fmode &= (FMODE_READ|FMODE_WRITE);
808 deleg_cur = rcu_dereference(nfsi->delegation);
809 if (deleg_cur == NULL)
812 spin_lock(&deleg_cur->lock);
813 if (nfsi->delegation != deleg_cur ||
814 (deleg_cur->type & fmode) != fmode)
815 goto no_delegation_unlock;
817 if (delegation == NULL)
818 delegation = &deleg_cur->stateid;
819 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
820 goto no_delegation_unlock;
822 nfs_mark_delegation_referenced(deleg_cur);
823 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
825 no_delegation_unlock:
826 spin_unlock(&deleg_cur->lock);
830 if (!ret && open_stateid != NULL) {
831 __update_open_stateid(state, open_stateid, NULL, fmode);
839 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
841 struct nfs_delegation *delegation;
844 delegation = rcu_dereference(NFS_I(inode)->delegation);
845 if (delegation == NULL || (delegation->type & fmode) == fmode) {
850 nfs_inode_return_delegation(inode);
853 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
855 struct nfs4_state *state = opendata->state;
856 struct nfs_inode *nfsi = NFS_I(state->inode);
857 struct nfs_delegation *delegation;
858 int open_mode = opendata->o_arg.open_flags & O_EXCL;
859 fmode_t fmode = opendata->o_arg.fmode;
860 nfs4_stateid stateid;
864 if (can_open_cached(state, fmode, open_mode)) {
865 spin_lock(&state->owner->so_lock);
866 if (can_open_cached(state, fmode, open_mode)) {
867 update_open_stateflags(state, fmode);
868 spin_unlock(&state->owner->so_lock);
869 goto out_return_state;
871 spin_unlock(&state->owner->so_lock);
874 delegation = rcu_dereference(nfsi->delegation);
875 if (delegation == NULL ||
876 !can_open_delegated(delegation, fmode)) {
880 /* Save the delegation */
881 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
883 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
888 /* Try to update the stateid using the delegation */
889 if (update_open_stateid(state, NULL, &stateid, fmode))
890 goto out_return_state;
895 atomic_inc(&state->count);
899 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
902 struct nfs4_state *state = NULL;
903 struct nfs_delegation *delegation;
906 if (!data->rpc_done) {
907 state = nfs4_try_open_cached(data);
912 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
914 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
915 ret = PTR_ERR(inode);
919 state = nfs4_get_open_state(inode, data->owner);
922 if (data->o_res.delegation_type != 0) {
923 int delegation_flags = 0;
926 delegation = rcu_dereference(NFS_I(inode)->delegation);
928 delegation_flags = delegation->flags;
930 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
931 nfs_inode_set_delegation(state->inode,
932 data->owner->so_cred,
935 nfs_inode_reclaim_delegation(state->inode,
936 data->owner->so_cred,
940 update_open_stateid(state, &data->o_res.stateid, NULL,
951 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
953 struct nfs_inode *nfsi = NFS_I(state->inode);
954 struct nfs_open_context *ctx;
956 spin_lock(&state->inode->i_lock);
957 list_for_each_entry(ctx, &nfsi->open_files, list) {
958 if (ctx->state != state)
960 get_nfs_open_context(ctx);
961 spin_unlock(&state->inode->i_lock);
964 spin_unlock(&state->inode->i_lock);
965 return ERR_PTR(-ENOENT);
968 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
970 struct nfs4_opendata *opendata;
972 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
973 if (opendata == NULL)
974 return ERR_PTR(-ENOMEM);
975 opendata->state = state;
976 atomic_inc(&state->count);
980 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
982 struct nfs4_state *newstate;
985 opendata->o_arg.open_flags = 0;
986 opendata->o_arg.fmode = fmode;
987 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
988 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
989 nfs4_init_opendata_res(opendata);
990 ret = _nfs4_proc_open(opendata);
993 newstate = nfs4_opendata_to_nfs4_state(opendata);
994 if (IS_ERR(newstate))
995 return PTR_ERR(newstate);
996 nfs4_close_state(&opendata->path, newstate, fmode);
1001 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1003 struct nfs4_state *newstate;
1006 /* memory barrier prior to reading state->n_* */
1007 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1009 if (state->n_rdwr != 0) {
1010 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1013 if (newstate != state)
1016 if (state->n_wronly != 0) {
1017 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1020 if (newstate != state)
1023 if (state->n_rdonly != 0) {
1024 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1027 if (newstate != state)
1031 * We may have performed cached opens for all three recoveries.
1032 * Check if we need to update the current stateid.
1034 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1035 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1036 write_seqlock(&state->seqlock);
1037 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1038 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1039 write_sequnlock(&state->seqlock);
1046 * reclaim state on the server after a reboot.
1048 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1050 struct nfs_delegation *delegation;
1051 struct nfs4_opendata *opendata;
1052 fmode_t delegation_type = 0;
1055 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1056 if (IS_ERR(opendata))
1057 return PTR_ERR(opendata);
1058 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1059 opendata->o_arg.fh = NFS_FH(state->inode);
1061 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1062 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1063 delegation_type = delegation->type;
1065 opendata->o_arg.u.delegation_type = delegation_type;
1066 status = nfs4_open_recover(opendata, state);
1067 nfs4_opendata_put(opendata);
1071 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1073 struct nfs_server *server = NFS_SERVER(state->inode);
1074 struct nfs4_exception exception = { };
1077 err = _nfs4_do_open_reclaim(ctx, state);
1078 if (err != -NFS4ERR_DELAY)
1080 nfs4_handle_exception(server, err, &exception);
1081 } while (exception.retry);
1085 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1087 struct nfs_open_context *ctx;
1090 ctx = nfs4_state_find_open_context(state);
1092 return PTR_ERR(ctx);
1093 ret = nfs4_do_open_reclaim(ctx, state);
1094 put_nfs_open_context(ctx);
1098 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1100 struct nfs4_opendata *opendata;
1103 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1104 if (IS_ERR(opendata))
1105 return PTR_ERR(opendata);
1106 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1107 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1108 sizeof(opendata->o_arg.u.delegation.data));
1109 ret = nfs4_open_recover(opendata, state);
1110 nfs4_opendata_put(opendata);
1114 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1116 struct nfs4_exception exception = { };
1117 struct nfs_server *server = NFS_SERVER(state->inode);
1120 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1124 case -NFS4ERR_STALE_CLIENTID:
1125 case -NFS4ERR_STALE_STATEID:
1126 case -NFS4ERR_EXPIRED:
1127 /* Don't recall a delegation if it was lost */
1128 nfs4_schedule_state_recovery(server->nfs_client);
1131 err = nfs4_handle_exception(server, err, &exception);
1132 } while (exception.retry);
1136 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1138 struct nfs4_opendata *data = calldata;
1140 data->rpc_status = task->tk_status;
1141 if (RPC_ASSASSINATED(task))
1143 if (data->rpc_status == 0) {
1144 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1145 sizeof(data->o_res.stateid.data));
1146 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1147 renew_lease(data->o_res.server, data->timestamp);
1152 static void nfs4_open_confirm_release(void *calldata)
1154 struct nfs4_opendata *data = calldata;
1155 struct nfs4_state *state = NULL;
1157 /* If this request hasn't been cancelled, do nothing */
1158 if (data->cancelled == 0)
1160 /* In case of error, no cleanup! */
1161 if (!data->rpc_done)
1163 state = nfs4_opendata_to_nfs4_state(data);
1165 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1167 nfs4_opendata_put(data);
1170 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1171 .rpc_call_done = nfs4_open_confirm_done,
1172 .rpc_release = nfs4_open_confirm_release,
1176 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1178 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1180 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1181 struct rpc_task *task;
1182 struct rpc_message msg = {
1183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1184 .rpc_argp = &data->c_arg,
1185 .rpc_resp = &data->c_res,
1186 .rpc_cred = data->owner->so_cred,
1188 struct rpc_task_setup task_setup_data = {
1189 .rpc_client = server->client,
1190 .rpc_message = &msg,
1191 .callback_ops = &nfs4_open_confirm_ops,
1192 .callback_data = data,
1193 .workqueue = nfsiod_workqueue,
1194 .flags = RPC_TASK_ASYNC,
1198 kref_get(&data->kref);
1200 data->rpc_status = 0;
1201 data->timestamp = jiffies;
1202 task = rpc_run_task(&task_setup_data);
1204 return PTR_ERR(task);
1205 status = nfs4_wait_for_completion_rpc_task(task);
1207 data->cancelled = 1;
1210 status = data->rpc_status;
1215 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1217 struct nfs4_opendata *data = calldata;
1218 struct nfs4_state_owner *sp = data->owner;
1220 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1223 * Check if we still need to send an OPEN call, or if we can use
1224 * a delegation instead.
1226 if (data->state != NULL) {
1227 struct nfs_delegation *delegation;
1229 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1232 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1233 if (delegation != NULL &&
1234 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1240 /* Update sequence id. */
1241 data->o_arg.id = sp->so_owner_id.id;
1242 data->o_arg.clientid = sp->so_client->cl_clientid;
1243 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1244 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1245 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1247 data->timestamp = jiffies;
1248 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1249 &data->o_arg.seq_args,
1250 &data->o_res.seq_res, 1, task))
1252 rpc_call_start(task);
1255 task->tk_action = NULL;
1259 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1261 struct nfs4_opendata *data = calldata;
1263 data->rpc_status = task->tk_status;
1265 nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res,
1268 if (RPC_ASSASSINATED(task))
1270 if (task->tk_status == 0) {
1271 switch (data->o_res.f_attr->mode & S_IFMT) {
1275 data->rpc_status = -ELOOP;
1278 data->rpc_status = -EISDIR;
1281 data->rpc_status = -ENOTDIR;
1283 renew_lease(data->o_res.server, data->timestamp);
1284 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1285 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1290 static void nfs4_open_release(void *calldata)
1292 struct nfs4_opendata *data = calldata;
1293 struct nfs4_state *state = NULL;
1295 /* If this request hasn't been cancelled, do nothing */
1296 if (data->cancelled == 0)
1298 /* In case of error, no cleanup! */
1299 if (data->rpc_status != 0 || !data->rpc_done)
1301 /* In case we need an open_confirm, no cleanup! */
1302 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1304 state = nfs4_opendata_to_nfs4_state(data);
1306 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1308 nfs4_opendata_put(data);
1311 static const struct rpc_call_ops nfs4_open_ops = {
1312 .rpc_call_prepare = nfs4_open_prepare,
1313 .rpc_call_done = nfs4_open_done,
1314 .rpc_release = nfs4_open_release,
1318 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1320 static int _nfs4_proc_open(struct nfs4_opendata *data)
1322 struct inode *dir = data->dir->d_inode;
1323 struct nfs_server *server = NFS_SERVER(dir);
1324 struct nfs_openargs *o_arg = &data->o_arg;
1325 struct nfs_openres *o_res = &data->o_res;
1326 struct rpc_task *task;
1327 struct rpc_message msg = {
1328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1331 .rpc_cred = data->owner->so_cred,
1333 struct rpc_task_setup task_setup_data = {
1334 .rpc_client = server->client,
1335 .rpc_message = &msg,
1336 .callback_ops = &nfs4_open_ops,
1337 .callback_data = data,
1338 .workqueue = nfsiod_workqueue,
1339 .flags = RPC_TASK_ASYNC,
1343 kref_get(&data->kref);
1345 data->rpc_status = 0;
1346 data->cancelled = 0;
1347 task = rpc_run_task(&task_setup_data);
1349 return PTR_ERR(task);
1350 status = nfs4_wait_for_completion_rpc_task(task);
1352 data->cancelled = 1;
1355 status = data->rpc_status;
1357 if (status != 0 || !data->rpc_done)
1360 if (o_res->fh.size == 0)
1361 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1363 if (o_arg->open_flags & O_CREAT) {
1364 update_changeattr(dir, &o_res->cinfo);
1365 nfs_post_op_update_inode(dir, o_res->dir_attr);
1367 nfs_refresh_inode(dir, o_res->dir_attr);
1368 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1369 status = _nfs4_proc_open_confirm(data);
1373 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1374 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1378 static int nfs4_recover_expired_lease(struct nfs_server *server)
1380 struct nfs_client *clp = server->nfs_client;
1384 ret = nfs4_wait_clnt_recover(clp);
1387 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1388 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1390 nfs4_schedule_state_recovery(clp);
1397 * reclaim state on the server after a network partition.
1398 * Assumes caller holds the appropriate lock
1400 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1402 struct nfs4_opendata *opendata;
1405 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1406 if (IS_ERR(opendata))
1407 return PTR_ERR(opendata);
1408 ret = nfs4_open_recover(opendata, state);
1410 d_drop(ctx->path.dentry);
1411 nfs4_opendata_put(opendata);
1415 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1417 struct nfs_server *server = NFS_SERVER(state->inode);
1418 struct nfs4_exception exception = { };
1422 err = _nfs4_open_expired(ctx, state);
1423 if (err != -NFS4ERR_DELAY)
1425 nfs4_handle_exception(server, err, &exception);
1426 } while (exception.retry);
1430 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1432 struct nfs_open_context *ctx;
1435 ctx = nfs4_state_find_open_context(state);
1437 return PTR_ERR(ctx);
1438 ret = nfs4_do_open_expired(ctx, state);
1439 put_nfs_open_context(ctx);
1444 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1445 * fields corresponding to attributes that were used to store the verifier.
1446 * Make sure we clobber those fields in the later setattr call
1448 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1450 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1451 !(sattr->ia_valid & ATTR_ATIME_SET))
1452 sattr->ia_valid |= ATTR_ATIME;
1454 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1455 !(sattr->ia_valid & ATTR_MTIME_SET))
1456 sattr->ia_valid |= ATTR_MTIME;
1460 * Returns a referenced nfs4_state
1462 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)
1464 struct nfs4_state_owner *sp;
1465 struct nfs4_state *state = NULL;
1466 struct nfs_server *server = NFS_SERVER(dir);
1467 struct nfs4_opendata *opendata;
1470 /* Protect against reboot recovery conflicts */
1472 if (!(sp = nfs4_get_state_owner(server, cred))) {
1473 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1476 status = nfs4_recover_expired_lease(server);
1478 goto err_put_state_owner;
1479 if (path->dentry->d_inode != NULL)
1480 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1482 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1483 if (opendata == NULL)
1484 goto err_put_state_owner;
1486 if (path->dentry->d_inode != NULL)
1487 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1489 status = _nfs4_proc_open(opendata);
1491 goto err_opendata_put;
1493 if (opendata->o_arg.open_flags & O_EXCL)
1494 nfs4_exclusive_attrset(opendata, sattr);
1496 state = nfs4_opendata_to_nfs4_state(opendata);
1497 status = PTR_ERR(state);
1499 goto err_opendata_put;
1500 nfs4_opendata_put(opendata);
1501 nfs4_put_state_owner(sp);
1505 nfs4_opendata_put(opendata);
1506 err_put_state_owner:
1507 nfs4_put_state_owner(sp);
1514 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)
1516 struct nfs4_exception exception = { };
1517 struct nfs4_state *res;
1521 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1524 /* NOTE: BAD_SEQID means the server and client disagree about the
1525 * book-keeping w.r.t. state-changing operations
1526 * (OPEN/CLOSE/LOCK/LOCKU...)
1527 * It is actually a sign of a bug on the client or on the server.
1529 * If we receive a BAD_SEQID error in the particular case of
1530 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1531 * have unhashed the old state_owner for us, and that we can
1532 * therefore safely retry using a new one. We should still warn
1533 * the user though...
1535 if (status == -NFS4ERR_BAD_SEQID) {
1536 printk(KERN_WARNING "NFS: v4 server %s "
1537 " returned a bad sequence-id error!\n",
1538 NFS_SERVER(dir)->nfs_client->cl_hostname);
1539 exception.retry = 1;
1543 * BAD_STATEID on OPEN means that the server cancelled our
1544 * state before it received the OPEN_CONFIRM.
1545 * Recover by retrying the request as per the discussion
1546 * on Page 181 of RFC3530.
1548 if (status == -NFS4ERR_BAD_STATEID) {
1549 exception.retry = 1;
1552 if (status == -EAGAIN) {
1553 /* We must have found a delegation */
1554 exception.retry = 1;
1557 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1558 status, &exception));
1559 } while (exception.retry);
1563 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1564 struct nfs_fattr *fattr, struct iattr *sattr,
1565 struct nfs4_state *state)
1567 struct nfs_server *server = NFS_SERVER(inode);
1568 struct nfs_setattrargs arg = {
1569 .fh = NFS_FH(inode),
1572 .bitmask = server->attr_bitmask,
1574 struct nfs_setattrres res = {
1578 struct rpc_message msg = {
1579 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1584 unsigned long timestamp = jiffies;
1587 nfs_fattr_init(fattr);
1589 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1590 /* Use that stateid */
1591 } else if (state != NULL) {
1592 nfs4_copy_stateid(&arg.stateid, state, current->files);
1594 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1596 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1597 if (status == 0 && state != NULL)
1598 renew_lease(server, timestamp);
1602 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1603 struct nfs_fattr *fattr, struct iattr *sattr,
1604 struct nfs4_state *state)
1606 struct nfs_server *server = NFS_SERVER(inode);
1607 struct nfs4_exception exception = { };
1610 err = nfs4_handle_exception(server,
1611 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1613 } while (exception.retry);
1617 struct nfs4_closedata {
1619 struct inode *inode;
1620 struct nfs4_state *state;
1621 struct nfs_closeargs arg;
1622 struct nfs_closeres res;
1623 struct nfs_fattr fattr;
1624 unsigned long timestamp;
1627 static void nfs4_free_closedata(void *data)
1629 struct nfs4_closedata *calldata = data;
1630 struct nfs4_state_owner *sp = calldata->state->owner;
1632 nfs4_put_open_state(calldata->state);
1633 nfs_free_seqid(calldata->arg.seqid);
1634 nfs4_put_state_owner(sp);
1635 path_put(&calldata->path);
1639 static void nfs4_close_done(struct rpc_task *task, void *data)
1641 struct nfs4_closedata *calldata = data;
1642 struct nfs4_state *state = calldata->state;
1643 struct nfs_server *server = NFS_SERVER(calldata->inode);
1645 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
1646 if (RPC_ASSASSINATED(task))
1648 /* hmm. we are done with the inode, and in the process of freeing
1649 * the state_owner. we keep this around to process errors
1651 switch (task->tk_status) {
1653 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1654 renew_lease(server, calldata->timestamp);
1656 case -NFS4ERR_STALE_STATEID:
1657 case -NFS4ERR_OLD_STATEID:
1658 case -NFS4ERR_BAD_STATEID:
1659 case -NFS4ERR_EXPIRED:
1660 if (calldata->arg.fmode == 0)
1663 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1664 rpc_restart_call(task);
1668 nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res);
1669 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1672 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1674 struct nfs4_closedata *calldata = data;
1675 struct nfs4_state *state = calldata->state;
1676 int clear_rd, clear_wr, clear_rdwr;
1678 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1681 clear_rd = clear_wr = clear_rdwr = 0;
1682 spin_lock(&state->owner->so_lock);
1683 /* Calculate the change in open mode */
1684 if (state->n_rdwr == 0) {
1685 if (state->n_rdonly == 0) {
1686 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1687 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1689 if (state->n_wronly == 0) {
1690 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1691 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1694 spin_unlock(&state->owner->so_lock);
1695 if (!clear_rd && !clear_wr && !clear_rdwr) {
1696 /* Note: exit _without_ calling nfs4_close_done */
1697 task->tk_action = NULL;
1700 nfs_fattr_init(calldata->res.fattr);
1701 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1702 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1703 calldata->arg.fmode = FMODE_READ;
1704 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1705 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1706 calldata->arg.fmode = FMODE_WRITE;
1708 calldata->timestamp = jiffies;
1709 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1710 &calldata->arg.seq_args, &calldata->res.seq_res,
1713 rpc_call_start(task);
1716 static const struct rpc_call_ops nfs4_close_ops = {
1717 .rpc_call_prepare = nfs4_close_prepare,
1718 .rpc_call_done = nfs4_close_done,
1719 .rpc_release = nfs4_free_closedata,
1723 * It is possible for data to be read/written from a mem-mapped file
1724 * after the sys_close call (which hits the vfs layer as a flush).
1725 * This means that we can't safely call nfsv4 close on a file until
1726 * the inode is cleared. This in turn means that we are not good
1727 * NFSv4 citizens - we do not indicate to the server to update the file's
1728 * share state even when we are done with one of the three share
1729 * stateid's in the inode.
1731 * NOTE: Caller must be holding the sp->so_owner semaphore!
1733 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1735 struct nfs_server *server = NFS_SERVER(state->inode);
1736 struct nfs4_closedata *calldata;
1737 struct nfs4_state_owner *sp = state->owner;
1738 struct rpc_task *task;
1739 struct rpc_message msg = {
1740 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1741 .rpc_cred = state->owner->so_cred,
1743 struct rpc_task_setup task_setup_data = {
1744 .rpc_client = server->client,
1745 .rpc_message = &msg,
1746 .callback_ops = &nfs4_close_ops,
1747 .workqueue = nfsiod_workqueue,
1748 .flags = RPC_TASK_ASYNC,
1750 int status = -ENOMEM;
1752 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1753 if (calldata == NULL)
1755 calldata->inode = state->inode;
1756 calldata->state = state;
1757 calldata->arg.fh = NFS_FH(state->inode);
1758 calldata->arg.stateid = &state->open_stateid;
1759 /* Serialization for the sequence id */
1760 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1761 if (calldata->arg.seqid == NULL)
1762 goto out_free_calldata;
1763 calldata->arg.fmode = 0;
1764 calldata->arg.bitmask = server->cache_consistency_bitmask;
1765 calldata->res.fattr = &calldata->fattr;
1766 calldata->res.seqid = calldata->arg.seqid;
1767 calldata->res.server = server;
1768 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
1769 calldata->path.mnt = mntget(path->mnt);
1770 calldata->path.dentry = dget(path->dentry);
1772 msg.rpc_argp = &calldata->arg,
1773 msg.rpc_resp = &calldata->res,
1774 task_setup_data.callback_data = calldata;
1775 task = rpc_run_task(&task_setup_data);
1777 return PTR_ERR(task);
1780 status = rpc_wait_for_completion_task(task);
1786 nfs4_put_open_state(state);
1787 nfs4_put_state_owner(sp);
1791 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1796 /* If the open_intent is for execute, we have an extra check to make */
1797 if (fmode & FMODE_EXEC) {
1798 ret = nfs_may_open(state->inode,
1799 state->owner->so_cred,
1800 nd->intent.open.flags);
1804 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1805 if (!IS_ERR(filp)) {
1806 struct nfs_open_context *ctx;
1807 ctx = nfs_file_open_context(filp);
1811 ret = PTR_ERR(filp);
1813 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1818 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1820 struct path path = {
1821 .mnt = nd->path.mnt,
1824 struct dentry *parent;
1826 struct rpc_cred *cred;
1827 struct nfs4_state *state;
1829 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1831 if (nd->flags & LOOKUP_CREATE) {
1832 attr.ia_mode = nd->intent.open.create_mode;
1833 attr.ia_valid = ATTR_MODE;
1834 if (!IS_POSIXACL(dir))
1835 attr.ia_mode &= ~current_umask();
1838 BUG_ON(nd->intent.open.flags & O_CREAT);
1841 cred = rpc_lookup_cred();
1843 return (struct dentry *)cred;
1844 parent = dentry->d_parent;
1845 /* Protect against concurrent sillydeletes */
1846 nfs_block_sillyrename(parent);
1847 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1849 if (IS_ERR(state)) {
1850 if (PTR_ERR(state) == -ENOENT) {
1851 d_add(dentry, NULL);
1852 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1854 nfs_unblock_sillyrename(parent);
1855 return (struct dentry *)state;
1857 res = d_add_unique(dentry, igrab(state->inode));
1860 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1861 nfs_unblock_sillyrename(parent);
1862 nfs4_intent_set_file(nd, &path, state, fmode);
1867 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1869 struct path path = {
1870 .mnt = nd->path.mnt,
1873 struct rpc_cred *cred;
1874 struct nfs4_state *state;
1875 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1877 cred = rpc_lookup_cred();
1879 return PTR_ERR(cred);
1880 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1882 if (IS_ERR(state)) {
1883 switch (PTR_ERR(state)) {
1889 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1895 if (state->inode == dentry->d_inode) {
1896 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1897 nfs4_intent_set_file(nd, &path, state, fmode);
1900 nfs4_close_sync(&path, state, fmode);
1906 void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1908 if (ctx->state == NULL)
1911 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1913 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1916 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1918 struct nfs4_server_caps_arg args = {
1921 struct nfs4_server_caps_res res = {};
1922 struct rpc_message msg = {
1923 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1929 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1931 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1932 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1933 server->caps |= NFS_CAP_ACLS;
1934 if (res.has_links != 0)
1935 server->caps |= NFS_CAP_HARDLINKS;
1936 if (res.has_symlinks != 0)
1937 server->caps |= NFS_CAP_SYMLINKS;
1938 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
1939 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
1940 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1941 server->acl_bitmask = res.acl_bitmask;
1947 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1949 struct nfs4_exception exception = { };
1952 err = nfs4_handle_exception(server,
1953 _nfs4_server_capabilities(server, fhandle),
1955 } while (exception.retry);
1959 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1960 struct nfs_fsinfo *info)
1962 struct nfs4_lookup_root_arg args = {
1963 .bitmask = nfs4_fattr_bitmap,
1965 struct nfs4_lookup_res res = {
1967 .fattr = info->fattr,
1970 struct rpc_message msg = {
1971 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1975 nfs_fattr_init(info->fattr);
1976 return nfs4_call_sync(server, &msg, &args, &res, 0);
1979 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1980 struct nfs_fsinfo *info)
1982 struct nfs4_exception exception = { };
1985 err = nfs4_handle_exception(server,
1986 _nfs4_lookup_root(server, fhandle, info),
1988 } while (exception.retry);
1993 * get the file handle for the "/" directory on the server
1995 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1996 struct nfs_fsinfo *info)
2000 status = nfs4_lookup_root(server, fhandle, info);
2002 status = nfs4_server_capabilities(server, fhandle);
2004 status = nfs4_do_fsinfo(server, fhandle, info);
2005 return nfs4_map_errors(status);
2009 * Get locations and (maybe) other attributes of a referral.
2010 * Note that we'll actually follow the referral later when
2011 * we detect fsid mismatch in inode revalidation
2013 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2015 int status = -ENOMEM;
2016 struct page *page = NULL;
2017 struct nfs4_fs_locations *locations = NULL;
2019 page = alloc_page(GFP_KERNEL);
2022 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2023 if (locations == NULL)
2026 status = nfs4_proc_fs_locations(dir, name, locations, page);
2029 /* Make sure server returned a different fsid for the referral */
2030 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2031 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2036 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2037 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2039 fattr->mode = S_IFDIR;
2040 memset(fhandle, 0, sizeof(struct nfs_fh));
2049 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2051 struct nfs4_getattr_arg args = {
2053 .bitmask = server->attr_bitmask,
2055 struct nfs4_getattr_res res = {
2059 struct rpc_message msg = {
2060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2065 nfs_fattr_init(fattr);
2066 return nfs4_call_sync(server, &msg, &args, &res, 0);
2069 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2071 struct nfs4_exception exception = { };
2074 err = nfs4_handle_exception(server,
2075 _nfs4_proc_getattr(server, fhandle, fattr),
2077 } while (exception.retry);
2082 * The file is not closed if it is opened due to the a request to change
2083 * the size of the file. The open call will not be needed once the
2084 * VFS layer lookup-intents are implemented.
2086 * Close is called when the inode is destroyed.
2087 * If we haven't opened the file for O_WRONLY, we
2088 * need to in the size_change case to obtain a stateid.
2091 * Because OPEN is always done by name in nfsv4, it is
2092 * possible that we opened a different file by the same
2093 * name. We can recognize this race condition, but we
2094 * can't do anything about it besides returning an error.
2096 * This will be fixed with VFS changes (lookup-intent).
2099 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2100 struct iattr *sattr)
2102 struct inode *inode = dentry->d_inode;
2103 struct rpc_cred *cred = NULL;
2104 struct nfs4_state *state = NULL;
2107 nfs_fattr_init(fattr);
2109 /* Search for an existing open(O_WRITE) file */
2110 if (sattr->ia_valid & ATTR_FILE) {
2111 struct nfs_open_context *ctx;
2113 ctx = nfs_file_open_context(sattr->ia_file);
2120 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2122 nfs_setattr_update_inode(inode, sattr);
2126 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2127 const struct qstr *name, struct nfs_fh *fhandle,
2128 struct nfs_fattr *fattr)
2131 struct nfs4_lookup_arg args = {
2132 .bitmask = server->attr_bitmask,
2136 struct nfs4_lookup_res res = {
2141 struct rpc_message msg = {
2142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2147 nfs_fattr_init(fattr);
2149 dprintk("NFS call lookupfh %s\n", name->name);
2150 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2151 dprintk("NFS reply lookupfh: %d\n", status);
2155 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2156 struct qstr *name, struct nfs_fh *fhandle,
2157 struct nfs_fattr *fattr)
2159 struct nfs4_exception exception = { };
2162 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2164 if (err == -NFS4ERR_MOVED) {
2168 err = nfs4_handle_exception(server, err, &exception);
2169 } while (exception.retry);
2173 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2174 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2178 dprintk("NFS call lookup %s\n", name->name);
2179 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2180 if (status == -NFS4ERR_MOVED)
2181 status = nfs4_get_referral(dir, name, fattr, fhandle);
2182 dprintk("NFS reply lookup: %d\n", status);
2186 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2188 struct nfs4_exception exception = { };
2191 err = nfs4_handle_exception(NFS_SERVER(dir),
2192 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2194 } while (exception.retry);
2198 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2200 struct nfs_server *server = NFS_SERVER(inode);
2201 struct nfs_fattr fattr;
2202 struct nfs4_accessargs args = {
2203 .fh = NFS_FH(inode),
2204 .bitmask = server->attr_bitmask,
2206 struct nfs4_accessres res = {
2210 struct rpc_message msg = {
2211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2214 .rpc_cred = entry->cred,
2216 int mode = entry->mask;
2220 * Determine which access bits we want to ask for...
2222 if (mode & MAY_READ)
2223 args.access |= NFS4_ACCESS_READ;
2224 if (S_ISDIR(inode->i_mode)) {
2225 if (mode & MAY_WRITE)
2226 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2227 if (mode & MAY_EXEC)
2228 args.access |= NFS4_ACCESS_LOOKUP;
2230 if (mode & MAY_WRITE)
2231 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2232 if (mode & MAY_EXEC)
2233 args.access |= NFS4_ACCESS_EXECUTE;
2235 nfs_fattr_init(&fattr);
2236 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2239 if (res.access & NFS4_ACCESS_READ)
2240 entry->mask |= MAY_READ;
2241 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2242 entry->mask |= MAY_WRITE;
2243 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2244 entry->mask |= MAY_EXEC;
2245 nfs_refresh_inode(inode, &fattr);
2250 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2252 struct nfs4_exception exception = { };
2255 err = nfs4_handle_exception(NFS_SERVER(inode),
2256 _nfs4_proc_access(inode, entry),
2258 } while (exception.retry);
2263 * TODO: For the time being, we don't try to get any attributes
2264 * along with any of the zero-copy operations READ, READDIR,
2267 * In the case of the first three, we want to put the GETATTR
2268 * after the read-type operation -- this is because it is hard
2269 * to predict the length of a GETATTR response in v4, and thus
2270 * align the READ data correctly. This means that the GETATTR
2271 * may end up partially falling into the page cache, and we should
2272 * shift it into the 'tail' of the xdr_buf before processing.
2273 * To do this efficiently, we need to know the total length
2274 * of data received, which doesn't seem to be available outside
2277 * In the case of WRITE, we also want to put the GETATTR after
2278 * the operation -- in this case because we want to make sure
2279 * we get the post-operation mtime and size. This means that
2280 * we can't use xdr_encode_pages() as written: we need a variant
2281 * of it which would leave room in the 'tail' iovec.
2283 * Both of these changes to the XDR layer would in fact be quite
2284 * minor, but I decided to leave them for a subsequent patch.
2286 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2287 unsigned int pgbase, unsigned int pglen)
2289 struct nfs4_readlink args = {
2290 .fh = NFS_FH(inode),
2295 struct nfs4_readlink_res res;
2296 struct rpc_message msg = {
2297 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2302 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2305 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2306 unsigned int pgbase, unsigned int pglen)
2308 struct nfs4_exception exception = { };
2311 err = nfs4_handle_exception(NFS_SERVER(inode),
2312 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2314 } while (exception.retry);
2320 * We will need to arrange for the VFS layer to provide an atomic open.
2321 * Until then, this create/open method is prone to inefficiency and race
2322 * conditions due to the lookup, create, and open VFS calls from sys_open()
2323 * placed on the wire.
2325 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2326 * The file will be opened again in the subsequent VFS open call
2327 * (nfs4_proc_file_open).
2329 * The open for read will just hang around to be used by any process that
2330 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2334 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2335 int flags, struct nameidata *nd)
2337 struct path path = {
2338 .mnt = nd->path.mnt,
2341 struct nfs4_state *state;
2342 struct rpc_cred *cred;
2343 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2346 cred = rpc_lookup_cred();
2348 status = PTR_ERR(cred);
2351 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2353 if (IS_ERR(state)) {
2354 status = PTR_ERR(state);
2357 d_add(dentry, igrab(state->inode));
2358 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2359 if (flags & O_EXCL) {
2360 struct nfs_fattr fattr;
2361 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2363 nfs_setattr_update_inode(state->inode, sattr);
2364 nfs_post_op_update_inode(state->inode, &fattr);
2366 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2367 status = nfs4_intent_set_file(nd, &path, state, fmode);
2369 nfs4_close_sync(&path, state, fmode);
2376 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2378 struct nfs_server *server = NFS_SERVER(dir);
2379 struct nfs_removeargs args = {
2381 .name.len = name->len,
2382 .name.name = name->name,
2383 .bitmask = server->attr_bitmask,
2385 struct nfs_removeres res = {
2388 struct rpc_message msg = {
2389 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2395 nfs_fattr_init(&res.dir_attr);
2396 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2398 update_changeattr(dir, &res.cinfo);
2399 nfs_post_op_update_inode(dir, &res.dir_attr);
2404 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2406 struct nfs4_exception exception = { };
2409 err = nfs4_handle_exception(NFS_SERVER(dir),
2410 _nfs4_proc_remove(dir, name),
2412 } while (exception.retry);
2416 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2418 struct nfs_server *server = NFS_SERVER(dir);
2419 struct nfs_removeargs *args = msg->rpc_argp;
2420 struct nfs_removeres *res = msg->rpc_resp;
2422 args->bitmask = server->cache_consistency_bitmask;
2423 res->server = server;
2424 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2427 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2429 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2431 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
2432 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2434 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res);
2435 update_changeattr(dir, &res->cinfo);
2436 nfs_post_op_update_inode(dir, &res->dir_attr);
2440 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2441 struct inode *new_dir, struct qstr *new_name)
2443 struct nfs_server *server = NFS_SERVER(old_dir);
2444 struct nfs4_rename_arg arg = {
2445 .old_dir = NFS_FH(old_dir),
2446 .new_dir = NFS_FH(new_dir),
2447 .old_name = old_name,
2448 .new_name = new_name,
2449 .bitmask = server->attr_bitmask,
2451 struct nfs_fattr old_fattr, new_fattr;
2452 struct nfs4_rename_res res = {
2454 .old_fattr = &old_fattr,
2455 .new_fattr = &new_fattr,
2457 struct rpc_message msg = {
2458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2464 nfs_fattr_init(res.old_fattr);
2465 nfs_fattr_init(res.new_fattr);
2466 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2469 update_changeattr(old_dir, &res.old_cinfo);
2470 nfs_post_op_update_inode(old_dir, res.old_fattr);
2471 update_changeattr(new_dir, &res.new_cinfo);
2472 nfs_post_op_update_inode(new_dir, res.new_fattr);
2477 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2478 struct inode *new_dir, struct qstr *new_name)
2480 struct nfs4_exception exception = { };
2483 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2484 _nfs4_proc_rename(old_dir, old_name,
2487 } while (exception.retry);
2491 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2493 struct nfs_server *server = NFS_SERVER(inode);
2494 struct nfs4_link_arg arg = {
2495 .fh = NFS_FH(inode),
2496 .dir_fh = NFS_FH(dir),
2498 .bitmask = server->attr_bitmask,
2500 struct nfs_fattr fattr, dir_attr;
2501 struct nfs4_link_res res = {
2504 .dir_attr = &dir_attr,
2506 struct rpc_message msg = {
2507 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2513 nfs_fattr_init(res.fattr);
2514 nfs_fattr_init(res.dir_attr);
2515 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2517 update_changeattr(dir, &res.cinfo);
2518 nfs_post_op_update_inode(dir, res.dir_attr);
2519 nfs_post_op_update_inode(inode, res.fattr);
2525 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2527 struct nfs4_exception exception = { };
2530 err = nfs4_handle_exception(NFS_SERVER(inode),
2531 _nfs4_proc_link(inode, dir, name),
2533 } while (exception.retry);
2537 struct nfs4_createdata {
2538 struct rpc_message msg;
2539 struct nfs4_create_arg arg;
2540 struct nfs4_create_res res;
2542 struct nfs_fattr fattr;
2543 struct nfs_fattr dir_fattr;
2546 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2547 struct qstr *name, struct iattr *sattr, u32 ftype)
2549 struct nfs4_createdata *data;
2551 data = kzalloc(sizeof(*data), GFP_KERNEL);
2553 struct nfs_server *server = NFS_SERVER(dir);
2555 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2556 data->msg.rpc_argp = &data->arg;
2557 data->msg.rpc_resp = &data->res;
2558 data->arg.dir_fh = NFS_FH(dir);
2559 data->arg.server = server;
2560 data->arg.name = name;
2561 data->arg.attrs = sattr;
2562 data->arg.ftype = ftype;
2563 data->arg.bitmask = server->attr_bitmask;
2564 data->res.server = server;
2565 data->res.fh = &data->fh;
2566 data->res.fattr = &data->fattr;
2567 data->res.dir_fattr = &data->dir_fattr;
2568 nfs_fattr_init(data->res.fattr);
2569 nfs_fattr_init(data->res.dir_fattr);
2574 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2576 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2577 &data->arg, &data->res, 1);
2579 update_changeattr(dir, &data->res.dir_cinfo);
2580 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2581 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2586 static void nfs4_free_createdata(struct nfs4_createdata *data)
2591 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2592 struct page *page, unsigned int len, struct iattr *sattr)
2594 struct nfs4_createdata *data;
2595 int status = -ENAMETOOLONG;
2597 if (len > NFS4_MAXPATHLEN)
2601 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2605 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2606 data->arg.u.symlink.pages = &page;
2607 data->arg.u.symlink.len = len;
2609 status = nfs4_do_create(dir, dentry, data);
2611 nfs4_free_createdata(data);
2616 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2617 struct page *page, unsigned int len, struct iattr *sattr)
2619 struct nfs4_exception exception = { };
2622 err = nfs4_handle_exception(NFS_SERVER(dir),
2623 _nfs4_proc_symlink(dir, dentry, page,
2626 } while (exception.retry);
2630 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2631 struct iattr *sattr)
2633 struct nfs4_createdata *data;
2634 int status = -ENOMEM;
2636 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2640 status = nfs4_do_create(dir, dentry, data);
2642 nfs4_free_createdata(data);
2647 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2648 struct iattr *sattr)
2650 struct nfs4_exception exception = { };
2653 err = nfs4_handle_exception(NFS_SERVER(dir),
2654 _nfs4_proc_mkdir(dir, dentry, sattr),
2656 } while (exception.retry);
2660 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2661 u64 cookie, struct page *page, unsigned int count, int plus)
2663 struct inode *dir = dentry->d_inode;
2664 struct nfs4_readdir_arg args = {
2669 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
2671 struct nfs4_readdir_res res;
2672 struct rpc_message msg = {
2673 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2680 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2681 dentry->d_parent->d_name.name,
2682 dentry->d_name.name,
2683 (unsigned long long)cookie);
2684 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2685 res.pgbase = args.pgbase;
2686 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2688 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2690 nfs_invalidate_atime(dir);
2692 dprintk("%s: returns %d\n", __func__, status);
2696 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2697 u64 cookie, struct page *page, unsigned int count, int plus)
2699 struct nfs4_exception exception = { };
2702 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2703 _nfs4_proc_readdir(dentry, cred, cookie,
2706 } while (exception.retry);
2710 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2711 struct iattr *sattr, dev_t rdev)
2713 struct nfs4_createdata *data;
2714 int mode = sattr->ia_mode;
2715 int status = -ENOMEM;
2717 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2718 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2720 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2725 data->arg.ftype = NF4FIFO;
2726 else if (S_ISBLK(mode)) {
2727 data->arg.ftype = NF4BLK;
2728 data->arg.u.device.specdata1 = MAJOR(rdev);
2729 data->arg.u.device.specdata2 = MINOR(rdev);
2731 else if (S_ISCHR(mode)) {
2732 data->arg.ftype = NF4CHR;
2733 data->arg.u.device.specdata1 = MAJOR(rdev);
2734 data->arg.u.device.specdata2 = MINOR(rdev);
2737 status = nfs4_do_create(dir, dentry, data);
2739 nfs4_free_createdata(data);
2744 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2745 struct iattr *sattr, dev_t rdev)
2747 struct nfs4_exception exception = { };
2750 err = nfs4_handle_exception(NFS_SERVER(dir),
2751 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2753 } while (exception.retry);
2757 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2758 struct nfs_fsstat *fsstat)
2760 struct nfs4_statfs_arg args = {
2762 .bitmask = server->attr_bitmask,
2764 struct nfs4_statfs_res res = {
2767 struct rpc_message msg = {
2768 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2773 nfs_fattr_init(fsstat->fattr);
2774 return nfs4_call_sync(server, &msg, &args, &res, 0);
2777 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2779 struct nfs4_exception exception = { };
2782 err = nfs4_handle_exception(server,
2783 _nfs4_proc_statfs(server, fhandle, fsstat),
2785 } while (exception.retry);
2789 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2790 struct nfs_fsinfo *fsinfo)
2792 struct nfs4_fsinfo_arg args = {
2794 .bitmask = server->attr_bitmask,
2796 struct nfs4_fsinfo_res res = {
2799 struct rpc_message msg = {
2800 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2805 return nfs4_call_sync(server, &msg, &args, &res, 0);
2808 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2810 struct nfs4_exception exception = { };
2814 err = nfs4_handle_exception(server,
2815 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2817 } while (exception.retry);
2821 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2823 nfs_fattr_init(fsinfo->fattr);
2824 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2827 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2828 struct nfs_pathconf *pathconf)
2830 struct nfs4_pathconf_arg args = {
2832 .bitmask = server->attr_bitmask,
2834 struct nfs4_pathconf_res res = {
2835 .pathconf = pathconf,
2837 struct rpc_message msg = {
2838 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2843 /* None of the pathconf attributes are mandatory to implement */
2844 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2845 memset(pathconf, 0, sizeof(*pathconf));
2849 nfs_fattr_init(pathconf->fattr);
2850 return nfs4_call_sync(server, &msg, &args, &res, 0);
2853 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2854 struct nfs_pathconf *pathconf)
2856 struct nfs4_exception exception = { };
2860 err = nfs4_handle_exception(server,
2861 _nfs4_proc_pathconf(server, fhandle, pathconf),
2863 } while (exception.retry);
2867 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2869 struct nfs_server *server = NFS_SERVER(data->inode);
2871 dprintk("--> %s\n", __func__);
2873 /* nfs4_sequence_free_slot called in the read rpc_call_done */
2874 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2876 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
2877 rpc_restart_call(task);
2881 nfs_invalidate_atime(data->inode);
2882 if (task->tk_status > 0)
2883 renew_lease(server, data->timestamp);
2887 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2889 data->timestamp = jiffies;
2890 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2893 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2895 struct inode *inode = data->inode;
2897 /* slot is freed in nfs_writeback_done */
2898 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2901 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
2902 rpc_restart_call(task);
2905 if (task->tk_status >= 0) {
2906 renew_lease(NFS_SERVER(inode), data->timestamp);
2907 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
2912 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
2914 struct nfs_server *server = NFS_SERVER(data->inode);
2916 data->args.bitmask = server->cache_consistency_bitmask;
2917 data->res.server = server;
2918 data->timestamp = jiffies;
2920 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
2923 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2925 struct inode *inode = data->inode;
2927 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2929 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
2930 rpc_restart_call(task);
2933 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
2934 &data->res.seq_res);
2935 nfs_refresh_inode(inode, data->res.fattr);
2939 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
2941 struct nfs_server *server = NFS_SERVER(data->inode);
2943 data->args.bitmask = server->cache_consistency_bitmask;
2944 data->res.server = server;
2945 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
2949 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2950 * standalone procedure for queueing an asynchronous RENEW.
2952 static void nfs4_renew_done(struct rpc_task *task, void *data)
2954 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2955 unsigned long timestamp = (unsigned long)data;
2957 if (task->tk_status < 0) {
2958 /* Unless we're shutting down, schedule state recovery! */
2959 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
2960 nfs4_schedule_state_recovery(clp);
2963 spin_lock(&clp->cl_lock);
2964 if (time_before(clp->cl_last_renewal,timestamp))
2965 clp->cl_last_renewal = timestamp;
2966 spin_unlock(&clp->cl_lock);
2969 static const struct rpc_call_ops nfs4_renew_ops = {
2970 .rpc_call_done = nfs4_renew_done,
2973 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2975 struct rpc_message msg = {
2976 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2981 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2982 &nfs4_renew_ops, (void *)jiffies);
2985 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2987 struct rpc_message msg = {
2988 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2992 unsigned long now = jiffies;
2995 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2998 spin_lock(&clp->cl_lock);
2999 if (time_before(clp->cl_last_renewal,now))
3000 clp->cl_last_renewal = now;
3001 spin_unlock(&clp->cl_lock);
3005 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3007 return (server->caps & NFS_CAP_ACLS)
3008 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3009 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3012 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3013 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3016 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3018 static void buf_to_pages(const void *buf, size_t buflen,
3019 struct page **pages, unsigned int *pgbase)
3021 const void *p = buf;
3023 *pgbase = offset_in_page(buf);
3025 while (p < buf + buflen) {
3026 *(pages++) = virt_to_page(p);
3027 p += PAGE_CACHE_SIZE;
3031 struct nfs4_cached_acl {
3037 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3039 struct nfs_inode *nfsi = NFS_I(inode);
3041 spin_lock(&inode->i_lock);
3042 kfree(nfsi->nfs4_acl);
3043 nfsi->nfs4_acl = acl;
3044 spin_unlock(&inode->i_lock);
3047 static void nfs4_zap_acl_attr(struct inode *inode)
3049 nfs4_set_cached_acl(inode, NULL);
3052 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3054 struct nfs_inode *nfsi = NFS_I(inode);
3055 struct nfs4_cached_acl *acl;
3058 spin_lock(&inode->i_lock);
3059 acl = nfsi->nfs4_acl;
3062 if (buf == NULL) /* user is just asking for length */
3064 if (acl->cached == 0)
3066 ret = -ERANGE; /* see getxattr(2) man page */
3067 if (acl->len > buflen)
3069 memcpy(buf, acl->data, acl->len);
3073 spin_unlock(&inode->i_lock);
3077 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3079 struct nfs4_cached_acl *acl;
3081 if (buf && acl_len <= PAGE_SIZE) {
3082 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3086 memcpy(acl->data, buf, acl_len);
3088 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3095 nfs4_set_cached_acl(inode, acl);
3098 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3100 struct page *pages[NFS4ACL_MAXPAGES];
3101 struct nfs_getaclargs args = {
3102 .fh = NFS_FH(inode),
3106 struct nfs_getaclres res = {
3110 struct rpc_message msg = {
3111 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3115 struct page *localpage = NULL;
3118 if (buflen < PAGE_SIZE) {
3119 /* As long as we're doing a round trip to the server anyway,
3120 * let's be prepared for a page of acl data. */
3121 localpage = alloc_page(GFP_KERNEL);
3122 resp_buf = page_address(localpage);
3123 if (localpage == NULL)
3125 args.acl_pages[0] = localpage;
3126 args.acl_pgbase = 0;
3127 args.acl_len = PAGE_SIZE;
3130 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3132 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3135 if (res.acl_len > args.acl_len)
3136 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3138 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3141 if (res.acl_len > buflen)
3144 memcpy(buf, resp_buf, res.acl_len);
3149 __free_page(localpage);
3153 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3155 struct nfs4_exception exception = { };
3158 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3161 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3162 } while (exception.retry);
3166 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3168 struct nfs_server *server = NFS_SERVER(inode);
3171 if (!nfs4_server_supports_acls(server))
3173 ret = nfs_revalidate_inode(server, inode);
3176 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3177 nfs_zap_acl_cache(inode);
3178 ret = nfs4_read_cached_acl(inode, buf, buflen);
3181 return nfs4_get_acl_uncached(inode, buf, buflen);
3184 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3186 struct nfs_server *server = NFS_SERVER(inode);
3187 struct page *pages[NFS4ACL_MAXPAGES];
3188 struct nfs_setaclargs arg = {
3189 .fh = NFS_FH(inode),
3193 struct nfs_setaclres res;
3194 struct rpc_message msg = {
3195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3201 if (!nfs4_server_supports_acls(server))
3203 nfs_inode_return_delegation(inode);
3204 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3205 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3206 nfs_access_zap_cache(inode);
3207 nfs_zap_acl_cache(inode);
3211 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3213 struct nfs4_exception exception = { };
3216 err = nfs4_handle_exception(NFS_SERVER(inode),
3217 __nfs4_proc_set_acl(inode, buf, buflen),
3219 } while (exception.retry);
3224 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3226 struct nfs_client *clp = server->nfs_client;
3228 if (!clp || task->tk_status >= 0)
3230 switch(task->tk_status) {
3231 case -NFS4ERR_ADMIN_REVOKED:
3232 case -NFS4ERR_BAD_STATEID:
3233 case -NFS4ERR_OPENMODE:
3236 nfs4_state_mark_reclaim_nograce(clp, state);
3237 case -NFS4ERR_STALE_CLIENTID:
3238 case -NFS4ERR_STALE_STATEID:
3239 case -NFS4ERR_EXPIRED:
3240 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3241 nfs4_schedule_state_recovery(clp);
3242 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3243 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3244 task->tk_status = 0;
3246 case -NFS4ERR_DELAY:
3247 nfs_inc_server_stats(server, NFSIOS_DELAY);
3248 case -NFS4ERR_GRACE:
3249 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3250 task->tk_status = 0;
3252 case -NFS4ERR_OLD_STATEID:
3253 task->tk_status = 0;
3256 task->tk_status = nfs4_map_errors(task->tk_status);
3260 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
3262 nfs4_verifier sc_verifier;
3263 struct nfs4_setclientid setclientid = {
3264 .sc_verifier = &sc_verifier,
3267 struct rpc_message msg = {
3268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3269 .rpc_argp = &setclientid,
3277 p = (__be32*)sc_verifier.data;
3278 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3279 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3282 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3283 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3285 rpc_peeraddr2str(clp->cl_rpcclient,
3287 rpc_peeraddr2str(clp->cl_rpcclient,
3289 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3290 clp->cl_id_uniquifier);
3291 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3292 sizeof(setclientid.sc_netid),
3293 rpc_peeraddr2str(clp->cl_rpcclient,
3294 RPC_DISPLAY_NETID));
3295 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3296 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3297 clp->cl_ipaddr, port >> 8, port & 255);
3299 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3300 if (status != -NFS4ERR_CLID_INUSE)
3305 ssleep(clp->cl_lease_time + 1);
3307 if (++clp->cl_id_uniquifier == 0)
3313 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3315 struct nfs_fsinfo fsinfo;
3316 struct rpc_message msg = {
3317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3319 .rpc_resp = &fsinfo,
3326 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3328 spin_lock(&clp->cl_lock);
3329 clp->cl_lease_time = fsinfo.lease_time * HZ;
3330 clp->cl_last_renewal = now;
3331 spin_unlock(&clp->cl_lock);
3336 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3341 err = _nfs4_proc_setclientid_confirm(clp, cred);
3345 case -NFS4ERR_RESOURCE:
3346 /* The IBM lawyers misread another document! */
3347 case -NFS4ERR_DELAY:
3348 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3354 struct nfs4_delegreturndata {
3355 struct nfs4_delegreturnargs args;
3356 struct nfs4_delegreturnres res;
3358 nfs4_stateid stateid;
3359 unsigned long timestamp;
3360 struct nfs_fattr fattr;
3364 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3366 struct nfs4_delegreturndata *data = calldata;
3368 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3371 data->rpc_status = task->tk_status;
3372 if (data->rpc_status == 0)
3373 renew_lease(data->res.server, data->timestamp);
3376 static void nfs4_delegreturn_release(void *calldata)
3381 #if defined(CONFIG_NFS_V4_1)
3382 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3384 struct nfs4_delegreturndata *d_data;
3386 d_data = (struct nfs4_delegreturndata *)data;
3388 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3389 &d_data->args.seq_args,
3390 &d_data->res.seq_res, 1, task))
3392 rpc_call_start(task);
3394 #endif /* CONFIG_NFS_V4_1 */
3396 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3397 #if defined(CONFIG_NFS_V4_1)
3398 .rpc_call_prepare = nfs4_delegreturn_prepare,
3399 #endif /* CONFIG_NFS_V4_1 */
3400 .rpc_call_done = nfs4_delegreturn_done,
3401 .rpc_release = nfs4_delegreturn_release,
3404 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3406 struct nfs4_delegreturndata *data;
3407 struct nfs_server *server = NFS_SERVER(inode);
3408 struct rpc_task *task;
3409 struct rpc_message msg = {
3410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3413 struct rpc_task_setup task_setup_data = {
3414 .rpc_client = server->client,
3415 .rpc_message = &msg,
3416 .callback_ops = &nfs4_delegreturn_ops,
3417 .flags = RPC_TASK_ASYNC,
3421 data = kzalloc(sizeof(*data), GFP_KERNEL);
3424 data->args.fhandle = &data->fh;
3425 data->args.stateid = &data->stateid;
3426 data->args.bitmask = server->attr_bitmask;
3427 nfs_copy_fh(&data->fh, NFS_FH(inode));
3428 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3429 data->res.fattr = &data->fattr;
3430 data->res.server = server;
3431 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3432 nfs_fattr_init(data->res.fattr);
3433 data->timestamp = jiffies;
3434 data->rpc_status = 0;
3436 task_setup_data.callback_data = data;
3437 msg.rpc_argp = &data->args,
3438 msg.rpc_resp = &data->res,
3439 task = rpc_run_task(&task_setup_data);
3441 return PTR_ERR(task);
3444 status = nfs4_wait_for_completion_rpc_task(task);
3447 status = data->rpc_status;
3450 nfs_refresh_inode(inode, &data->fattr);
3456 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3458 struct nfs_server *server = NFS_SERVER(inode);
3459 struct nfs4_exception exception = { };
3462 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3464 case -NFS4ERR_STALE_STATEID:
3465 case -NFS4ERR_EXPIRED:
3469 err = nfs4_handle_exception(server, err, &exception);
3470 } while (exception.retry);
3474 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3475 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3478 * sleep, with exponential backoff, and retry the LOCK operation.
3480 static unsigned long
3481 nfs4_set_lock_task_retry(unsigned long timeout)
3483 schedule_timeout_killable(timeout);
3485 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3486 return NFS4_LOCK_MAXTIMEOUT;
3490 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3492 struct inode *inode = state->inode;
3493 struct nfs_server *server = NFS_SERVER(inode);
3494 struct nfs_client *clp = server->nfs_client;
3495 struct nfs_lockt_args arg = {
3496 .fh = NFS_FH(inode),
3499 struct nfs_lockt_res res = {
3502 struct rpc_message msg = {
3503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3506 .rpc_cred = state->owner->so_cred,
3508 struct nfs4_lock_state *lsp;
3511 arg.lock_owner.clientid = clp->cl_clientid;
3512 status = nfs4_set_lock_state(state, request);
3515 lsp = request->fl_u.nfs4_fl.owner;
3516 arg.lock_owner.id = lsp->ls_id.id;
3517 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3520 request->fl_type = F_UNLCK;
3522 case -NFS4ERR_DENIED:
3525 request->fl_ops->fl_release_private(request);
3530 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3532 struct nfs4_exception exception = { };
3536 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3537 _nfs4_proc_getlk(state, cmd, request),
3539 } while (exception.retry);
3543 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3546 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3548 res = posix_lock_file_wait(file, fl);
3551 res = flock_lock_file_wait(file, fl);
3559 struct nfs4_unlockdata {
3560 struct nfs_locku_args arg;
3561 struct nfs_locku_res res;
3562 struct nfs4_lock_state *lsp;
3563 struct nfs_open_context *ctx;
3564 struct file_lock fl;
3565 const struct nfs_server *server;
3566 unsigned long timestamp;
3569 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3570 struct nfs_open_context *ctx,
3571 struct nfs4_lock_state *lsp,
3572 struct nfs_seqid *seqid)
3574 struct nfs4_unlockdata *p;
3575 struct inode *inode = lsp->ls_state->inode;
3577 p = kzalloc(sizeof(*p), GFP_KERNEL);
3580 p->arg.fh = NFS_FH(inode);
3582 p->arg.seqid = seqid;
3583 p->res.seqid = seqid;
3584 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3585 p->arg.stateid = &lsp->ls_stateid;
3587 atomic_inc(&lsp->ls_count);
3588 /* Ensure we don't close file until we're done freeing locks! */
3589 p->ctx = get_nfs_open_context(ctx);
3590 memcpy(&p->fl, fl, sizeof(p->fl));
3591 p->server = NFS_SERVER(inode);
3595 static void nfs4_locku_release_calldata(void *data)
3597 struct nfs4_unlockdata *calldata = data;
3598 nfs_free_seqid(calldata->arg.seqid);
3599 nfs4_put_lock_state(calldata->lsp);
3600 put_nfs_open_context(calldata->ctx);
3604 static void nfs4_locku_done(struct rpc_task *task, void *data)
3606 struct nfs4_unlockdata *calldata = data;
3608 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3610 if (RPC_ASSASSINATED(task))
3612 switch (task->tk_status) {
3614 memcpy(calldata->lsp->ls_stateid.data,
3615 calldata->res.stateid.data,
3616 sizeof(calldata->lsp->ls_stateid.data));
3617 renew_lease(calldata->server, calldata->timestamp);
3619 case -NFS4ERR_BAD_STATEID:
3620 case -NFS4ERR_OLD_STATEID:
3621 case -NFS4ERR_STALE_STATEID:
3622 case -NFS4ERR_EXPIRED:
3625 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3626 rpc_restart_call(task);
3628 nfs4_sequence_free_slot(calldata->server->nfs_client,
3629 &calldata->res.seq_res);
3632 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3634 struct nfs4_unlockdata *calldata = data;
3636 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3638 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3639 /* Note: exit _without_ running nfs4_locku_done */
3640 task->tk_action = NULL;
3643 calldata->timestamp = jiffies;
3644 if (nfs4_setup_sequence(calldata->server->nfs_client,
3645 &calldata->arg.seq_args,
3646 &calldata->res.seq_res, 1, task))
3648 rpc_call_start(task);
3651 static const struct rpc_call_ops nfs4_locku_ops = {
3652 .rpc_call_prepare = nfs4_locku_prepare,
3653 .rpc_call_done = nfs4_locku_done,
3654 .rpc_release = nfs4_locku_release_calldata,
3657 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3658 struct nfs_open_context *ctx,
3659 struct nfs4_lock_state *lsp,
3660 struct nfs_seqid *seqid)
3662 struct nfs4_unlockdata *data;
3663 struct rpc_message msg = {
3664 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3665 .rpc_cred = ctx->cred,
3667 struct rpc_task_setup task_setup_data = {
3668 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3669 .rpc_message = &msg,
3670 .callback_ops = &nfs4_locku_ops,
3671 .workqueue = nfsiod_workqueue,
3672 .flags = RPC_TASK_ASYNC,
3675 /* Ensure this is an unlock - when canceling a lock, the
3676 * canceled lock is passed in, and it won't be an unlock.
3678 fl->fl_type = F_UNLCK;
3680 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3682 nfs_free_seqid(seqid);
3683 return ERR_PTR(-ENOMEM);
3686 msg.rpc_argp = &data->arg,
3687 msg.rpc_resp = &data->res,
3688 task_setup_data.callback_data = data;
3689 return rpc_run_task(&task_setup_data);
3692 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3694 struct nfs_inode *nfsi = NFS_I(state->inode);
3695 struct nfs_seqid *seqid;
3696 struct nfs4_lock_state *lsp;
3697 struct rpc_task *task;
3699 unsigned char fl_flags = request->fl_flags;
3701 status = nfs4_set_lock_state(state, request);
3702 /* Unlock _before_ we do the RPC call */
3703 request->fl_flags |= FL_EXISTS;
3704 down_read(&nfsi->rwsem);
3705 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3706 up_read(&nfsi->rwsem);
3709 up_read(&nfsi->rwsem);
3712 /* Is this a delegated lock? */
3713 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3715 lsp = request->fl_u.nfs4_fl.owner;
3716 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3720 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3721 status = PTR_ERR(task);
3724 status = nfs4_wait_for_completion_rpc_task(task);
3727 request->fl_flags = fl_flags;
3731 struct nfs4_lockdata {
3732 struct nfs_lock_args arg;
3733 struct nfs_lock_res res;
3734 struct nfs4_lock_state *lsp;
3735 struct nfs_open_context *ctx;
3736 struct file_lock fl;
3737 unsigned long timestamp;
3740 struct nfs_server *server;
3743 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3744 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3746 struct nfs4_lockdata *p;
3747 struct inode *inode = lsp->ls_state->inode;
3748 struct nfs_server *server = NFS_SERVER(inode);
3750 p = kzalloc(sizeof(*p), GFP_KERNEL);
3754 p->arg.fh = NFS_FH(inode);
3756 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3757 if (p->arg.open_seqid == NULL)
3759 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3760 if (p->arg.lock_seqid == NULL)
3761 goto out_free_seqid;
3762 p->arg.lock_stateid = &lsp->ls_stateid;
3763 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3764 p->arg.lock_owner.id = lsp->ls_id.id;
3765 p->res.lock_seqid = p->arg.lock_seqid;
3766 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3769 atomic_inc(&lsp->ls_count);
3770 p->ctx = get_nfs_open_context(ctx);
3771 memcpy(&p->fl, fl, sizeof(p->fl));
3774 nfs_free_seqid(p->arg.open_seqid);
3780 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3782 struct nfs4_lockdata *data = calldata;
3783 struct nfs4_state *state = data->lsp->ls_state;
3785 dprintk("%s: begin!\n", __func__);
3786 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3788 /* Do we need to do an open_to_lock_owner? */
3789 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3790 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3792 data->arg.open_stateid = &state->stateid;
3793 data->arg.new_lock_owner = 1;
3794 data->res.open_seqid = data->arg.open_seqid;
3796 data->arg.new_lock_owner = 0;
3797 data->timestamp = jiffies;
3798 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3799 &data->res.seq_res, 1, task))
3801 rpc_call_start(task);
3802 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3805 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3807 struct nfs4_lockdata *data = calldata;
3809 dprintk("%s: begin!\n", __func__);
3811 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3814 data->rpc_status = task->tk_status;
3815 if (RPC_ASSASSINATED(task))
3817 if (data->arg.new_lock_owner != 0) {
3818 if (data->rpc_status == 0)
3819 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3823 if (data->rpc_status == 0) {
3824 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3825 sizeof(data->lsp->ls_stateid.data));
3826 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3827 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3830 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3833 static void nfs4_lock_release(void *calldata)
3835 struct nfs4_lockdata *data = calldata;
3837 dprintk("%s: begin!\n", __func__);
3838 nfs_free_seqid(data->arg.open_seqid);
3839 if (data->cancelled != 0) {
3840 struct rpc_task *task;
3841 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3842 data->arg.lock_seqid);
3845 dprintk("%s: cancelling lock!\n", __func__);
3847 nfs_free_seqid(data->arg.lock_seqid);
3848 nfs4_put_lock_state(data->lsp);
3849 put_nfs_open_context(data->ctx);
3851 dprintk("%s: done!\n", __func__);
3854 static const struct rpc_call_ops nfs4_lock_ops = {
3855 .rpc_call_prepare = nfs4_lock_prepare,
3856 .rpc_call_done = nfs4_lock_done,
3857 .rpc_release = nfs4_lock_release,
3860 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3862 struct nfs4_lockdata *data;
3863 struct rpc_task *task;
3864 struct rpc_message msg = {
3865 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3866 .rpc_cred = state->owner->so_cred,
3868 struct rpc_task_setup task_setup_data = {
3869 .rpc_client = NFS_CLIENT(state->inode),
3870 .rpc_message = &msg,
3871 .callback_ops = &nfs4_lock_ops,
3872 .workqueue = nfsiod_workqueue,
3873 .flags = RPC_TASK_ASYNC,
3877 dprintk("%s: begin!\n", __func__);
3878 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3879 fl->fl_u.nfs4_fl.owner);
3883 data->arg.block = 1;
3885 data->arg.reclaim = 1;
3886 msg.rpc_argp = &data->arg,
3887 msg.rpc_resp = &data->res,
3888 task_setup_data.callback_data = data;
3889 task = rpc_run_task(&task_setup_data);
3891 return PTR_ERR(task);
3892 ret = nfs4_wait_for_completion_rpc_task(task);
3894 ret = data->rpc_status;
3895 if (ret == -NFS4ERR_DENIED)
3898 data->cancelled = 1;
3900 dprintk("%s: done, ret = %d!\n", __func__, ret);
3904 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3906 struct nfs_server *server = NFS_SERVER(state->inode);
3907 struct nfs4_exception exception = { };
3911 /* Cache the lock if possible... */
3912 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3914 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3915 if (err != -NFS4ERR_DELAY)
3917 nfs4_handle_exception(server, err, &exception);
3918 } while (exception.retry);
3922 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3924 struct nfs_server *server = NFS_SERVER(state->inode);
3925 struct nfs4_exception exception = { };
3928 err = nfs4_set_lock_state(state, request);
3932 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3934 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3935 if (err != -NFS4ERR_DELAY)
3937 nfs4_handle_exception(server, err, &exception);
3938 } while (exception.retry);
3942 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3944 struct nfs_inode *nfsi = NFS_I(state->inode);
3945 unsigned char fl_flags = request->fl_flags;
3948 /* Is this a delegated open? */
3949 status = nfs4_set_lock_state(state, request);
3952 request->fl_flags |= FL_ACCESS;
3953 status = do_vfs_lock(request->fl_file, request);
3956 down_read(&nfsi->rwsem);
3957 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3958 /* Yes: cache locks! */
3959 /* ...but avoid races with delegation recall... */
3960 request->fl_flags = fl_flags & ~FL_SLEEP;
3961 status = do_vfs_lock(request->fl_file, request);
3964 status = _nfs4_do_setlk(state, cmd, request, 0);
3967 /* Note: we always want to sleep here! */
3968 request->fl_flags = fl_flags | FL_SLEEP;
3969 if (do_vfs_lock(request->fl_file, request) < 0)
3970 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
3972 up_read(&nfsi->rwsem);
3974 request->fl_flags = fl_flags;
3978 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3980 struct nfs4_exception exception = { };
3984 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3985 _nfs4_proc_setlk(state, cmd, request),
3987 } while (exception.retry);
3992 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3994 struct nfs_open_context *ctx;
3995 struct nfs4_state *state;
3996 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3999 /* verify open state */
4000 ctx = nfs_file_open_context(filp);
4003 if (request->fl_start < 0 || request->fl_end < 0)
4007 return nfs4_proc_getlk(state, F_GETLK, request);
4009 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4012 if (request->fl_type == F_UNLCK)
4013 return nfs4_proc_unlck(state, cmd, request);
4016 status = nfs4_proc_setlk(state, cmd, request);
4017 if ((status != -EAGAIN) || IS_SETLK(cmd))
4019 timeout = nfs4_set_lock_task_retry(timeout);
4020 status = -ERESTARTSYS;
4023 } while(status < 0);
4027 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4029 struct nfs_server *server = NFS_SERVER(state->inode);
4030 struct nfs4_exception exception = { };
4033 err = nfs4_set_lock_state(state, fl);
4037 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
4038 if (err != -NFS4ERR_DELAY)
4040 err = nfs4_handle_exception(server, err, &exception);
4041 } while (exception.retry);
4046 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4048 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4049 size_t buflen, int flags)
4051 struct inode *inode = dentry->d_inode;
4053 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4056 return nfs4_proc_set_acl(inode, buf, buflen);
4059 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4060 * and that's what we'll do for e.g. user attributes that haven't been set.
4061 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4062 * attributes in kernel-managed attribute namespaces. */
4063 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4066 struct inode *inode = dentry->d_inode;
4068 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4071 return nfs4_proc_get_acl(inode, buf, buflen);
4074 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4076 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
4078 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4080 if (buf && buflen < len)
4083 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4087 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4089 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4090 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4091 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4094 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4095 NFS_ATTR_FATTR_NLINK;
4096 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4100 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4101 struct nfs4_fs_locations *fs_locations, struct page *page)
4103 struct nfs_server *server = NFS_SERVER(dir);
4105 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4106 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4108 struct nfs4_fs_locations_arg args = {
4109 .dir_fh = NFS_FH(dir),
4114 struct nfs4_fs_locations_res res = {
4115 .fs_locations = fs_locations,
4117 struct rpc_message msg = {
4118 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4124 dprintk("%s: start\n", __func__);
4125 nfs_fattr_init(&fs_locations->fattr);
4126 fs_locations->server = server;
4127 fs_locations->nlocations = 0;
4128 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4129 nfs_fixup_referral_attributes(&fs_locations->fattr);
4130 dprintk("%s: returned status = %d\n", __func__, status);
4134 #ifdef CONFIG_NFS_V4_1
4136 * nfs4_proc_exchange_id()
4138 * Since the clientid has expired, all compounds using sessions
4139 * associated with the stale clientid will be returning
4140 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4141 * be in some phase of session reset.
4143 static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4145 nfs4_verifier verifier;
4146 struct nfs41_exchange_id_args args = {
4148 .flags = clp->cl_exchange_flags,
4150 struct nfs41_exchange_id_res res = {
4154 struct rpc_message msg = {
4155 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4162 dprintk("--> %s\n", __func__);
4163 BUG_ON(clp == NULL);
4164 p = (u32 *)verifier.data;
4165 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4166 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4167 args.verifier = &verifier;
4170 args.id_len = scnprintf(args.id, sizeof(args.id),
4173 rpc_peeraddr2str(clp->cl_rpcclient,
4175 clp->cl_id_uniquifier);
4177 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4179 if (status != NFS4ERR_CLID_INUSE)
4185 if (++clp->cl_id_uniquifier == 0)
4189 dprintk("<-- %s status= %d\n", __func__, status);
4193 struct nfs4_get_lease_time_data {
4194 struct nfs4_get_lease_time_args *args;
4195 struct nfs4_get_lease_time_res *res;
4196 struct nfs_client *clp;
4199 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4203 struct nfs4_get_lease_time_data *data =
4204 (struct nfs4_get_lease_time_data *)calldata;
4206 dprintk("--> %s\n", __func__);
4207 /* just setup sequence, do not trigger session recovery
4208 since we're invoked within one */
4209 ret = nfs41_setup_sequence(data->clp->cl_session,
4210 &data->args->la_seq_args,
4211 &data->res->lr_seq_res, 0, task);
4213 BUG_ON(ret == -EAGAIN);
4214 rpc_call_start(task);
4215 dprintk("<-- %s\n", __func__);
4219 * Called from nfs4_state_manager thread for session setup, so don't recover
4220 * from sequence operation or clientid errors.
4222 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4224 struct nfs4_get_lease_time_data *data =
4225 (struct nfs4_get_lease_time_data *)calldata;
4227 dprintk("--> %s\n", __func__);
4228 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4229 switch (task->tk_status) {
4230 case -NFS4ERR_DELAY:
4231 case -NFS4ERR_GRACE:
4232 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4233 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4234 task->tk_status = 0;
4235 rpc_restart_call(task);
4238 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4239 dprintk("<-- %s\n", __func__);
4242 struct rpc_call_ops nfs4_get_lease_time_ops = {
4243 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4244 .rpc_call_done = nfs4_get_lease_time_done,
4247 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4249 struct rpc_task *task;
4250 struct nfs4_get_lease_time_args args;
4251 struct nfs4_get_lease_time_res res = {
4252 .lr_fsinfo = fsinfo,
4254 struct nfs4_get_lease_time_data data = {
4259 struct rpc_message msg = {
4260 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4264 struct rpc_task_setup task_setup = {
4265 .rpc_client = clp->cl_rpcclient,
4266 .rpc_message = &msg,
4267 .callback_ops = &nfs4_get_lease_time_ops,
4268 .callback_data = &data
4272 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4273 dprintk("--> %s\n", __func__);
4274 task = rpc_run_task(&task_setup);
4277 status = PTR_ERR(task);
4279 status = task->tk_status;
4282 dprintk("<-- %s return %d\n", __func__, status);
4288 * Initialize slot table
4290 static int nfs4_init_slot_table(struct nfs4_session *session)
4292 struct nfs4_slot_table *tbl = &session->fc_slot_table;
4293 int i, max_slots = session->fc_attrs.max_reqs;
4294 struct nfs4_slot *slot;
4297 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4299 dprintk("--> %s: max_reqs=%u\n", __func__,
4300 session->fc_attrs.max_reqs);
4302 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4305 for (i = 0; i < max_slots; ++i)
4309 spin_lock(&tbl->slot_tbl_lock);
4310 if (tbl->slots != NULL) {
4311 spin_unlock(&tbl->slot_tbl_lock);
4312 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4313 __func__, tbl, tbl->slots);
4317 tbl->max_slots = max_slots;
4319 tbl->highest_used_slotid = -1; /* no slot is currently used */
4320 spin_unlock(&tbl->slot_tbl_lock);
4321 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4322 tbl, tbl->slots, tbl->max_slots);
4324 dprintk("<-- %s: return %d\n", __func__, ret);
4331 /* Destroy the slot table */
4332 static void nfs4_destroy_slot_table(struct nfs4_session *session)
4334 if (session->fc_slot_table.slots == NULL)
4336 kfree(session->fc_slot_table.slots);
4337 session->fc_slot_table.slots = NULL;
4341 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4343 struct nfs4_session *session;
4344 struct nfs4_slot_table *tbl;
4346 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4349 tbl = &session->fc_slot_table;
4350 spin_lock_init(&tbl->slot_tbl_lock);
4351 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table");
4356 void nfs4_destroy_session(struct nfs4_session *session)
4358 nfs4_destroy_slot_table(session);
4363 * Initialize the values to be used by the client in CREATE_SESSION
4364 * If nfs4_init_session set the fore channel request and response sizes,
4367 * Set the back channel max_resp_sz_cached to zero to force the client to
4368 * always set csa_cachethis to FALSE because the current implementation
4369 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4371 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4373 struct nfs4_session *session = args->client->cl_session;
4374 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4375 mxresp_sz = session->fc_attrs.max_resp_sz;
4378 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4380 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4381 /* Fore channel attributes */
4382 args->fc_attrs.headerpadsz = 0;
4383 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4384 args->fc_attrs.max_resp_sz = mxresp_sz;
4385 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4386 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4387 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4389 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4390 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4392 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4393 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4394 args->fc_attrs.max_reqs);
4396 /* Back channel attributes */
4397 args->bc_attrs.headerpadsz = 0;
4398 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4399 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4400 args->bc_attrs.max_resp_sz_cached = 0;
4401 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4402 args->bc_attrs.max_reqs = 1;
4404 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4405 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4407 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4408 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4409 args->bc_attrs.max_reqs);
4412 static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4416 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4417 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4421 #define _verify_fore_channel_attr(_name_) \
4422 _verify_channel_attr("fore", #_name_, \
4423 args->fc_attrs._name_, \
4424 session->fc_attrs._name_)
4426 #define _verify_back_channel_attr(_name_) \
4427 _verify_channel_attr("back", #_name_, \
4428 args->bc_attrs._name_, \
4429 session->bc_attrs._name_)
4432 * The server is not allowed to increase the fore channel header pad size,
4433 * maximum response size, or maximum number of operations.
4435 * The back channel attributes are only negotiatied down: We send what the
4436 * (back channel) server insists upon.
4438 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4439 struct nfs4_session *session)
4443 ret |= _verify_fore_channel_attr(headerpadsz);
4444 ret |= _verify_fore_channel_attr(max_resp_sz);
4445 ret |= _verify_fore_channel_attr(max_ops);
4447 ret |= _verify_back_channel_attr(headerpadsz);
4448 ret |= _verify_back_channel_attr(max_rqst_sz);
4449 ret |= _verify_back_channel_attr(max_resp_sz);
4450 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4451 ret |= _verify_back_channel_attr(max_ops);
4452 ret |= _verify_back_channel_attr(max_reqs);
4457 static int _nfs4_proc_create_session(struct nfs_client *clp)
4459 struct nfs4_session *session = clp->cl_session;
4460 struct nfs41_create_session_args args = {
4462 .cb_program = NFS4_CALLBACK,
4464 struct nfs41_create_session_res res = {
4467 struct rpc_message msg = {
4468 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4474 nfs4_init_channel_attrs(&args);
4475 args.flags = (SESSION4_PERSIST);
4477 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4480 /* Verify the session's negotiated channel_attrs values */
4481 status = nfs4_verify_channel_attrs(&args, session);
4483 /* Increment the clientid slot sequence id */
4491 * Issues a CREATE_SESSION operation to the server.
4492 * It is the responsibility of the caller to verify the session is
4493 * expired before calling this routine.
4495 int nfs4_proc_create_session(struct nfs_client *clp)
4499 struct nfs_fsinfo fsinfo;
4500 struct nfs4_session *session = clp->cl_session;
4502 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4504 status = _nfs4_proc_create_session(clp);
4508 /* Init the fore channel */
4509 status = nfs4_init_slot_table(session);
4510 dprintk("fore channel slot table initialization returned %d\n", status);
4514 ptr = (unsigned *)&session->sess_id.data[0];
4515 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4516 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4518 /* Get the lease time */
4519 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4521 /* Update lease time and schedule renewal */
4522 spin_lock(&clp->cl_lock);
4523 clp->cl_lease_time = fsinfo.lease_time * HZ;
4524 clp->cl_last_renewal = jiffies;
4525 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4526 spin_unlock(&clp->cl_lock);
4528 nfs4_schedule_state_renewal(clp);
4531 dprintk("<-- %s\n", __func__);
4536 * Issue the over-the-wire RPC DESTROY_SESSION.
4537 * The caller must serialize access to this routine.
4539 int nfs4_proc_destroy_session(struct nfs4_session *session)
4542 struct rpc_message msg;
4544 dprintk("--> nfs4_proc_destroy_session\n");
4546 /* session is still being setup */
4547 if (session->clp->cl_cons_state != NFS_CS_READY)
4550 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4551 msg.rpc_argp = session;
4552 msg.rpc_resp = NULL;
4553 msg.rpc_cred = NULL;
4554 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4558 "Got error %d from the server on DESTROY_SESSION. "
4559 "Session has been destroyed regardless...\n", status);
4561 dprintk("<-- nfs4_proc_destroy_session\n");
4565 #endif /* CONFIG_NFS_V4_1 */
4567 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
4568 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4569 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4570 .recover_open = nfs4_open_reclaim,
4571 .recover_lock = nfs4_lock_reclaim,
4574 struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
4575 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4576 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4577 .recover_open = nfs4_open_expired,
4578 .recover_lock = nfs4_lock_expired,
4581 static const struct inode_operations nfs4_file_inode_operations = {
4582 .permission = nfs_permission,
4583 .getattr = nfs_getattr,
4584 .setattr = nfs_setattr,
4585 .getxattr = nfs4_getxattr,
4586 .setxattr = nfs4_setxattr,
4587 .listxattr = nfs4_listxattr,
4590 const struct nfs_rpc_ops nfs_v4_clientops = {
4591 .version = 4, /* protocol version */
4592 .dentry_ops = &nfs4_dentry_operations,
4593 .dir_inode_ops = &nfs4_dir_inode_operations,
4594 .file_inode_ops = &nfs4_file_inode_operations,
4595 .getroot = nfs4_proc_get_root,
4596 .getattr = nfs4_proc_getattr,
4597 .setattr = nfs4_proc_setattr,
4598 .lookupfh = nfs4_proc_lookupfh,
4599 .lookup = nfs4_proc_lookup,
4600 .access = nfs4_proc_access,
4601 .readlink = nfs4_proc_readlink,
4602 .create = nfs4_proc_create,
4603 .remove = nfs4_proc_remove,
4604 .unlink_setup = nfs4_proc_unlink_setup,
4605 .unlink_done = nfs4_proc_unlink_done,
4606 .rename = nfs4_proc_rename,
4607 .link = nfs4_proc_link,
4608 .symlink = nfs4_proc_symlink,
4609 .mkdir = nfs4_proc_mkdir,
4610 .rmdir = nfs4_proc_remove,
4611 .readdir = nfs4_proc_readdir,
4612 .mknod = nfs4_proc_mknod,
4613 .statfs = nfs4_proc_statfs,
4614 .fsinfo = nfs4_proc_fsinfo,
4615 .pathconf = nfs4_proc_pathconf,
4616 .set_capabilities = nfs4_server_capabilities,
4617 .decode_dirent = nfs4_decode_dirent,
4618 .read_setup = nfs4_proc_read_setup,
4619 .read_done = nfs4_read_done,
4620 .write_setup = nfs4_proc_write_setup,
4621 .write_done = nfs4_write_done,
4622 .commit_setup = nfs4_proc_commit_setup,
4623 .commit_done = nfs4_commit_done,
4624 .lock = nfs4_proc_lock,
4625 .clear_acl_cache = nfs4_zap_acl_attr,
4626 .close_context = nfs4_close_context,