4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/sunrpc/clnt.h>
43 #include <linux/nfs.h>
44 #include <linux/nfs4.h>
45 #include <linux/nfs_fs.h>
46 #include <linux/nfs_page.h>
47 #include <linux/namei.h>
48 #include <linux/mount.h>
49 #include <linux/module.h>
50 #include <linux/sunrpc/bc_xprt.h>
53 #include "delegation.h"
58 #define NFSDBG_FACILITY NFSDBG_PROC
60 #define NFS4_POLL_RETRY_MIN (HZ/10)
61 #define NFS4_POLL_RETRY_MAX (15*HZ)
63 #define NFS4_MAX_LOOP_ON_RECOVER (10)
66 static int _nfs4_proc_open(struct nfs4_opendata *data);
67 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
68 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
69 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
70 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
72 /* Prevent leaks of NFSv4 errors into userland */
73 static int nfs4_map_errors(int err)
78 case -NFS4ERR_RESOURCE:
81 dprintk("%s could not handle NFSv4 error %d\n",
89 * This is our standard bitmap for GETATTR requests.
91 const u32 nfs4_fattr_bitmap[2] = {
96 | FATTR4_WORD0_FILEID,
98 | FATTR4_WORD1_NUMLINKS
100 | FATTR4_WORD1_OWNER_GROUP
101 | FATTR4_WORD1_RAWDEV
102 | FATTR4_WORD1_SPACE_USED
103 | FATTR4_WORD1_TIME_ACCESS
104 | FATTR4_WORD1_TIME_METADATA
105 | FATTR4_WORD1_TIME_MODIFY
108 const u32 nfs4_statfs_bitmap[2] = {
109 FATTR4_WORD0_FILES_AVAIL
110 | FATTR4_WORD0_FILES_FREE
111 | FATTR4_WORD0_FILES_TOTAL,
112 FATTR4_WORD1_SPACE_AVAIL
113 | FATTR4_WORD1_SPACE_FREE
114 | FATTR4_WORD1_SPACE_TOTAL
117 const u32 nfs4_pathconf_bitmap[2] = {
119 | FATTR4_WORD0_MAXNAME,
123 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
124 | FATTR4_WORD0_MAXREAD
125 | FATTR4_WORD0_MAXWRITE
126 | FATTR4_WORD0_LEASE_TIME,
130 const u32 nfs4_fs_locations_bitmap[2] = {
132 | FATTR4_WORD0_CHANGE
135 | FATTR4_WORD0_FILEID
136 | FATTR4_WORD0_FS_LOCATIONS,
138 | FATTR4_WORD1_NUMLINKS
140 | FATTR4_WORD1_OWNER_GROUP
141 | FATTR4_WORD1_RAWDEV
142 | FATTR4_WORD1_SPACE_USED
143 | FATTR4_WORD1_TIME_ACCESS
144 | FATTR4_WORD1_TIME_METADATA
145 | FATTR4_WORD1_TIME_MODIFY
146 | FATTR4_WORD1_MOUNTED_ON_FILEID
149 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
150 struct nfs4_readdir_arg *readdir)
154 BUG_ON(readdir->count < 80);
156 readdir->cookie = cookie;
157 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
162 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
167 * NFSv4 servers do not return entries for '.' and '..'
168 * Therefore, we fake these entries here. We let '.'
169 * have cookie 0 and '..' have cookie 1. Note that
170 * when talking to the server, we always send cookie 0
173 start = p = kmap_atomic(*readdir->pages, KM_USER0);
176 *p++ = xdr_one; /* next */
177 *p++ = xdr_zero; /* cookie, first word */
178 *p++ = xdr_one; /* cookie, second word */
179 *p++ = xdr_one; /* entry len */
180 memcpy(p, ".\0\0\0", 4); /* entry */
182 *p++ = xdr_one; /* bitmap length */
183 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
184 *p++ = htonl(8); /* attribute buffer length */
185 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
188 *p++ = xdr_one; /* next */
189 *p++ = xdr_zero; /* cookie, first word */
190 *p++ = xdr_two; /* cookie, second word */
191 *p++ = xdr_two; /* entry len */
192 memcpy(p, "..\0\0", 4); /* entry */
194 *p++ = xdr_one; /* bitmap length */
195 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
196 *p++ = htonl(8); /* attribute buffer length */
197 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
199 readdir->pgbase = (char *)p - (char *)start;
200 readdir->count -= readdir->pgbase;
201 kunmap_atomic(start, KM_USER0);
204 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
210 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
211 nfs_wait_bit_killable, TASK_KILLABLE);
215 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
222 *timeout = NFS4_POLL_RETRY_MIN;
223 if (*timeout > NFS4_POLL_RETRY_MAX)
224 *timeout = NFS4_POLL_RETRY_MAX;
225 schedule_timeout_killable(*timeout);
226 if (fatal_signal_pending(current))
232 /* This is the error handling routine for processes that are allowed
235 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
237 struct nfs_client *clp = server->nfs_client;
238 struct nfs4_state *state = exception->state;
241 exception->retry = 0;
245 case -NFS4ERR_ADMIN_REVOKED:
246 case -NFS4ERR_BAD_STATEID:
247 case -NFS4ERR_OPENMODE:
250 nfs4_state_mark_reclaim_nograce(clp, state);
251 case -NFS4ERR_STALE_CLIENTID:
252 case -NFS4ERR_STALE_STATEID:
253 case -NFS4ERR_EXPIRED:
254 nfs4_schedule_state_recovery(clp);
255 ret = nfs4_wait_clnt_recover(clp);
257 exception->retry = 1;
258 #if !defined(CONFIG_NFS_V4_1)
260 #else /* !defined(CONFIG_NFS_V4_1) */
261 if (!nfs4_has_session(server->nfs_client))
264 case -NFS4ERR_BADSESSION:
265 case -NFS4ERR_BADSLOT:
266 case -NFS4ERR_BAD_HIGH_SLOT:
267 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
268 case -NFS4ERR_DEADSESSION:
269 case -NFS4ERR_SEQ_FALSE_RETRY:
270 case -NFS4ERR_SEQ_MISORDERED:
271 dprintk("%s ERROR: %d Reset session\n", __func__,
273 nfs4_schedule_state_recovery(clp);
274 exception->retry = 1;
276 #endif /* !defined(CONFIG_NFS_V4_1) */
277 case -NFS4ERR_FILE_OPEN:
278 if (exception->timeout > HZ) {
279 /* We have retried a decent amount, time to
287 ret = nfs4_delay(server->client, &exception->timeout);
290 case -NFS4ERR_OLD_STATEID:
291 exception->retry = 1;
293 /* We failed to handle the error */
294 return nfs4_map_errors(ret);
298 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
300 struct nfs_client *clp = server->nfs_client;
301 spin_lock(&clp->cl_lock);
302 if (time_before(clp->cl_last_renewal,timestamp))
303 clp->cl_last_renewal = timestamp;
304 spin_unlock(&clp->cl_lock);
307 #if defined(CONFIG_NFS_V4_1)
310 * nfs4_free_slot - free a slot and efficiently update slot table.
312 * freeing a slot is trivially done by clearing its respective bit
314 * If the freed slotid equals highest_used_slotid we want to update it
315 * so that the server would be able to size down the slot table if needed,
316 * otherwise we know that the highest_used_slotid is still in use.
317 * When updating highest_used_slotid there may be "holes" in the bitmap
318 * so we need to scan down from highest_used_slotid to 0 looking for the now
319 * highest slotid in use.
320 * If none found, highest_used_slotid is set to -1.
322 * Must be called while holding tbl->slot_tbl_lock
325 nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
327 int slotid = free_slotid;
329 /* clear used bit in bitmap */
330 __clear_bit(slotid, tbl->used_slots);
332 /* update highest_used_slotid when it is freed */
333 if (slotid == tbl->highest_used_slotid) {
334 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
335 if (slotid < tbl->max_slots)
336 tbl->highest_used_slotid = slotid;
338 tbl->highest_used_slotid = -1;
340 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
341 free_slotid, tbl->highest_used_slotid);
345 * Signal state manager thread if session is drained
347 static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
349 if (!test_bit(NFS4CLNT_SESSION_DRAINING, &ses->clp->cl_state)) {
350 rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
354 if (ses->fc_slot_table.highest_used_slotid != -1)
357 dprintk("%s COMPLETE: Session Drained\n", __func__);
358 complete(&ses->complete);
361 static void nfs41_sequence_free_slot(const struct nfs_client *clp,
362 struct nfs4_sequence_res *res)
364 struct nfs4_slot_table *tbl;
366 tbl = &clp->cl_session->fc_slot_table;
367 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
368 /* just wake up the next guy waiting since
369 * we may have not consumed a slot after all */
370 dprintk("%s: No slot\n", __func__);
374 spin_lock(&tbl->slot_tbl_lock);
375 nfs4_free_slot(tbl, res->sr_slotid);
376 nfs41_check_drain_session_complete(clp->cl_session);
377 spin_unlock(&tbl->slot_tbl_lock);
378 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
381 static void nfs41_sequence_done(struct nfs_client *clp,
382 struct nfs4_sequence_res *res,
385 unsigned long timestamp;
386 struct nfs4_slot_table *tbl;
387 struct nfs4_slot *slot;
390 * sr_status remains 1 if an RPC level error occurred. The server
391 * may or may not have processed the sequence operation..
392 * Proceed as if the server received and processed the sequence
395 if (res->sr_status == 1)
396 res->sr_status = NFS_OK;
398 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
399 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
402 /* Check the SEQUENCE operation status */
403 if (res->sr_status == 0) {
404 tbl = &clp->cl_session->fc_slot_table;
405 slot = tbl->slots + res->sr_slotid;
406 /* Update the slot's sequence and clientid lease timer */
408 timestamp = res->sr_renewal_time;
409 spin_lock(&clp->cl_lock);
410 if (time_before(clp->cl_last_renewal, timestamp))
411 clp->cl_last_renewal = timestamp;
412 spin_unlock(&clp->cl_lock);
413 /* Check sequence flags */
414 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
417 /* The session may be reset by one of the error handlers. */
418 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
419 nfs41_sequence_free_slot(clp, res);
423 * nfs4_find_slot - efficiently look for a free slot
425 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
426 * If found, we mark the slot as used, update the highest_used_slotid,
427 * and respectively set up the sequence operation args.
428 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
430 * Note: must be called with under the slot_tbl_lock.
433 nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
436 u8 ret_id = NFS4_MAX_SLOT_TABLE;
437 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
439 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
440 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
442 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
443 if (slotid >= tbl->max_slots)
445 __set_bit(slotid, tbl->used_slots);
446 if (slotid > tbl->highest_used_slotid)
447 tbl->highest_used_slotid = slotid;
450 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
451 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
455 static int nfs41_setup_sequence(struct nfs4_session *session,
456 struct nfs4_sequence_args *args,
457 struct nfs4_sequence_res *res,
459 struct rpc_task *task)
461 struct nfs4_slot *slot;
462 struct nfs4_slot_table *tbl;
465 dprintk("--> %s\n", __func__);
466 /* slot already allocated? */
467 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
470 memset(res, 0, sizeof(*res));
471 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
472 tbl = &session->fc_slot_table;
474 spin_lock(&tbl->slot_tbl_lock);
475 if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state)) {
477 * The state manager will wait until the slot table is empty.
478 * Schedule the reset thread
480 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
481 spin_unlock(&tbl->slot_tbl_lock);
482 dprintk("%s Schedule Session Reset\n", __func__);
486 slotid = nfs4_find_slot(tbl, task);
487 if (slotid == NFS4_MAX_SLOT_TABLE) {
488 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
489 spin_unlock(&tbl->slot_tbl_lock);
490 dprintk("<-- %s: no free slots\n", __func__);
493 spin_unlock(&tbl->slot_tbl_lock);
495 slot = tbl->slots + slotid;
496 args->sa_session = session;
497 args->sa_slotid = slotid;
498 args->sa_cache_this = cache_reply;
500 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
502 res->sr_session = session;
503 res->sr_slotid = slotid;
504 res->sr_renewal_time = jiffies;
506 * sr_status is only set in decode_sequence, and so will remain
507 * set to 1 if an rpc level failure occurs.
513 int nfs4_setup_sequence(struct nfs_client *clp,
514 struct nfs4_sequence_args *args,
515 struct nfs4_sequence_res *res,
517 struct rpc_task *task)
521 dprintk("--> %s clp %p session %p sr_slotid %d\n",
522 __func__, clp, clp->cl_session, res->sr_slotid);
524 if (!nfs4_has_session(clp))
526 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
528 if (ret && ret != -EAGAIN) {
529 /* terminate rpc task */
530 task->tk_status = ret;
531 task->tk_action = NULL;
534 dprintk("<-- %s status=%d\n", __func__, ret);
538 struct nfs41_call_sync_data {
539 struct nfs_client *clp;
540 struct nfs4_sequence_args *seq_args;
541 struct nfs4_sequence_res *seq_res;
545 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
547 struct nfs41_call_sync_data *data = calldata;
549 dprintk("--> %s data->clp->cl_session %p\n", __func__,
550 data->clp->cl_session);
551 if (nfs4_setup_sequence(data->clp, data->seq_args,
552 data->seq_res, data->cache_reply, task))
554 rpc_call_start(task);
557 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
559 struct nfs41_call_sync_data *data = calldata;
561 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
564 struct rpc_call_ops nfs41_call_sync_ops = {
565 .rpc_call_prepare = nfs41_call_sync_prepare,
566 .rpc_call_done = nfs41_call_sync_done,
569 static int nfs4_call_sync_sequence(struct nfs_client *clp,
570 struct rpc_clnt *clnt,
571 struct rpc_message *msg,
572 struct nfs4_sequence_args *args,
573 struct nfs4_sequence_res *res,
577 struct rpc_task *task;
578 struct nfs41_call_sync_data data = {
582 .cache_reply = cache_reply,
584 struct rpc_task_setup task_setup = {
587 .callback_ops = &nfs41_call_sync_ops,
588 .callback_data = &data
591 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
592 task = rpc_run_task(&task_setup);
596 ret = task->tk_status;
602 int _nfs4_call_sync_session(struct nfs_server *server,
603 struct rpc_message *msg,
604 struct nfs4_sequence_args *args,
605 struct nfs4_sequence_res *res,
608 return nfs4_call_sync_sequence(server->nfs_client, server->client,
609 msg, args, res, cache_reply);
612 #endif /* CONFIG_NFS_V4_1 */
614 int _nfs4_call_sync(struct nfs_server *server,
615 struct rpc_message *msg,
616 struct nfs4_sequence_args *args,
617 struct nfs4_sequence_res *res,
620 args->sa_session = res->sr_session = NULL;
621 return rpc_call_sync(server->client, msg, 0);
624 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
625 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
626 &(res)->seq_res, (cache_reply))
628 static void nfs4_sequence_done(const struct nfs_server *server,
629 struct nfs4_sequence_res *res, int rpc_status)
631 #ifdef CONFIG_NFS_V4_1
632 if (nfs4_has_session(server->nfs_client))
633 nfs41_sequence_done(server->nfs_client, res, rpc_status);
634 #endif /* CONFIG_NFS_V4_1 */
637 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
639 struct nfs_inode *nfsi = NFS_I(dir);
641 spin_lock(&dir->i_lock);
642 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
643 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
644 nfs_force_lookup_revalidate(dir);
645 nfsi->change_attr = cinfo->after;
646 spin_unlock(&dir->i_lock);
649 struct nfs4_opendata {
651 struct nfs_openargs o_arg;
652 struct nfs_openres o_res;
653 struct nfs_open_confirmargs c_arg;
654 struct nfs_open_confirmres c_res;
655 struct nfs_fattr f_attr;
656 struct nfs_fattr dir_attr;
659 struct nfs4_state_owner *owner;
660 struct nfs4_state *state;
662 unsigned long timestamp;
663 unsigned int rpc_done : 1;
669 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
671 p->o_res.f_attr = &p->f_attr;
672 p->o_res.dir_attr = &p->dir_attr;
673 p->o_res.seqid = p->o_arg.seqid;
674 p->c_res.seqid = p->c_arg.seqid;
675 p->o_res.server = p->o_arg.server;
676 nfs_fattr_init(&p->f_attr);
677 nfs_fattr_init(&p->dir_attr);
678 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
681 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
682 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
683 const struct iattr *attrs)
685 struct dentry *parent = dget_parent(path->dentry);
686 struct inode *dir = parent->d_inode;
687 struct nfs_server *server = NFS_SERVER(dir);
688 struct nfs4_opendata *p;
690 p = kzalloc(sizeof(*p), GFP_KERNEL);
693 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
694 if (p->o_arg.seqid == NULL)
696 p->path.mnt = mntget(path->mnt);
697 p->path.dentry = dget(path->dentry);
700 atomic_inc(&sp->so_count);
701 p->o_arg.fh = NFS_FH(dir);
702 p->o_arg.open_flags = flags;
703 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
704 p->o_arg.clientid = server->nfs_client->cl_clientid;
705 p->o_arg.id = sp->so_owner_id.id;
706 p->o_arg.name = &p->path.dentry->d_name;
707 p->o_arg.server = server;
708 p->o_arg.bitmask = server->attr_bitmask;
709 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
710 if (flags & O_EXCL) {
711 if (nfs4_has_persistent_session(server->nfs_client)) {
713 p->o_arg.u.attrs = &p->attrs;
714 memcpy(&p->attrs, attrs, sizeof(p->attrs));
715 } else { /* EXCLUSIVE4_1 */
716 u32 *s = (u32 *) p->o_arg.u.verifier.data;
720 } else if (flags & O_CREAT) {
721 p->o_arg.u.attrs = &p->attrs;
722 memcpy(&p->attrs, attrs, sizeof(p->attrs));
724 p->c_arg.fh = &p->o_res.fh;
725 p->c_arg.stateid = &p->o_res.stateid;
726 p->c_arg.seqid = p->o_arg.seqid;
727 nfs4_init_opendata_res(p);
737 static void nfs4_opendata_free(struct kref *kref)
739 struct nfs4_opendata *p = container_of(kref,
740 struct nfs4_opendata, kref);
742 nfs_free_seqid(p->o_arg.seqid);
743 if (p->state != NULL)
744 nfs4_put_open_state(p->state);
745 nfs4_put_state_owner(p->owner);
751 static void nfs4_opendata_put(struct nfs4_opendata *p)
754 kref_put(&p->kref, nfs4_opendata_free);
757 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
761 ret = rpc_wait_for_completion_task(task);
765 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
769 if (open_mode & O_EXCL)
771 switch (mode & (FMODE_READ|FMODE_WRITE)) {
773 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
774 && state->n_rdonly != 0;
777 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
778 && state->n_wronly != 0;
780 case FMODE_READ|FMODE_WRITE:
781 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
782 && state->n_rdwr != 0;
788 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
790 if ((delegation->type & fmode) != fmode)
792 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
794 nfs_mark_delegation_referenced(delegation);
798 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
807 case FMODE_READ|FMODE_WRITE:
810 nfs4_state_set_mode_locked(state, state->state | fmode);
813 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
815 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
816 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
817 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
820 set_bit(NFS_O_RDONLY_STATE, &state->flags);
823 set_bit(NFS_O_WRONLY_STATE, &state->flags);
825 case FMODE_READ|FMODE_WRITE:
826 set_bit(NFS_O_RDWR_STATE, &state->flags);
830 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
832 write_seqlock(&state->seqlock);
833 nfs_set_open_stateid_locked(state, stateid, fmode);
834 write_sequnlock(&state->seqlock);
837 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
840 * Protect the call to nfs4_state_set_mode_locked and
841 * serialise the stateid update
843 write_seqlock(&state->seqlock);
844 if (deleg_stateid != NULL) {
845 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
846 set_bit(NFS_DELEGATED_STATE, &state->flags);
848 if (open_stateid != NULL)
849 nfs_set_open_stateid_locked(state, open_stateid, fmode);
850 write_sequnlock(&state->seqlock);
851 spin_lock(&state->owner->so_lock);
852 update_open_stateflags(state, fmode);
853 spin_unlock(&state->owner->so_lock);
856 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
858 struct nfs_inode *nfsi = NFS_I(state->inode);
859 struct nfs_delegation *deleg_cur;
862 fmode &= (FMODE_READ|FMODE_WRITE);
865 deleg_cur = rcu_dereference(nfsi->delegation);
866 if (deleg_cur == NULL)
869 spin_lock(&deleg_cur->lock);
870 if (nfsi->delegation != deleg_cur ||
871 (deleg_cur->type & fmode) != fmode)
872 goto no_delegation_unlock;
874 if (delegation == NULL)
875 delegation = &deleg_cur->stateid;
876 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
877 goto no_delegation_unlock;
879 nfs_mark_delegation_referenced(deleg_cur);
880 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
882 no_delegation_unlock:
883 spin_unlock(&deleg_cur->lock);
887 if (!ret && open_stateid != NULL) {
888 __update_open_stateid(state, open_stateid, NULL, fmode);
896 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
898 struct nfs_delegation *delegation;
901 delegation = rcu_dereference(NFS_I(inode)->delegation);
902 if (delegation == NULL || (delegation->type & fmode) == fmode) {
907 nfs_inode_return_delegation(inode);
910 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
912 struct nfs4_state *state = opendata->state;
913 struct nfs_inode *nfsi = NFS_I(state->inode);
914 struct nfs_delegation *delegation;
915 int open_mode = opendata->o_arg.open_flags & O_EXCL;
916 fmode_t fmode = opendata->o_arg.fmode;
917 nfs4_stateid stateid;
921 if (can_open_cached(state, fmode, open_mode)) {
922 spin_lock(&state->owner->so_lock);
923 if (can_open_cached(state, fmode, open_mode)) {
924 update_open_stateflags(state, fmode);
925 spin_unlock(&state->owner->so_lock);
926 goto out_return_state;
928 spin_unlock(&state->owner->so_lock);
931 delegation = rcu_dereference(nfsi->delegation);
932 if (delegation == NULL ||
933 !can_open_delegated(delegation, fmode)) {
937 /* Save the delegation */
938 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
940 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
945 /* Try to update the stateid using the delegation */
946 if (update_open_stateid(state, NULL, &stateid, fmode))
947 goto out_return_state;
952 atomic_inc(&state->count);
956 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
959 struct nfs4_state *state = NULL;
960 struct nfs_delegation *delegation;
963 if (!data->rpc_done) {
964 state = nfs4_try_open_cached(data);
969 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
971 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
972 ret = PTR_ERR(inode);
976 state = nfs4_get_open_state(inode, data->owner);
979 if (data->o_res.delegation_type != 0) {
980 int delegation_flags = 0;
983 delegation = rcu_dereference(NFS_I(inode)->delegation);
985 delegation_flags = delegation->flags;
987 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
988 nfs_inode_set_delegation(state->inode,
989 data->owner->so_cred,
992 nfs_inode_reclaim_delegation(state->inode,
993 data->owner->so_cred,
997 update_open_stateid(state, &data->o_res.stateid, NULL,
1005 return ERR_PTR(ret);
1008 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1010 struct nfs_inode *nfsi = NFS_I(state->inode);
1011 struct nfs_open_context *ctx;
1013 spin_lock(&state->inode->i_lock);
1014 list_for_each_entry(ctx, &nfsi->open_files, list) {
1015 if (ctx->state != state)
1017 get_nfs_open_context(ctx);
1018 spin_unlock(&state->inode->i_lock);
1021 spin_unlock(&state->inode->i_lock);
1022 return ERR_PTR(-ENOENT);
1025 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1027 struct nfs4_opendata *opendata;
1029 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
1030 if (opendata == NULL)
1031 return ERR_PTR(-ENOMEM);
1032 opendata->state = state;
1033 atomic_inc(&state->count);
1037 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1039 struct nfs4_state *newstate;
1042 opendata->o_arg.open_flags = 0;
1043 opendata->o_arg.fmode = fmode;
1044 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1045 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1046 nfs4_init_opendata_res(opendata);
1047 ret = _nfs4_proc_open(opendata);
1050 newstate = nfs4_opendata_to_nfs4_state(opendata);
1051 if (IS_ERR(newstate))
1052 return PTR_ERR(newstate);
1053 nfs4_close_state(&opendata->path, newstate, fmode);
1058 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1060 struct nfs4_state *newstate;
1063 /* memory barrier prior to reading state->n_* */
1064 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1066 if (state->n_rdwr != 0) {
1067 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1070 if (newstate != state)
1073 if (state->n_wronly != 0) {
1074 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1077 if (newstate != state)
1080 if (state->n_rdonly != 0) {
1081 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1084 if (newstate != state)
1088 * We may have performed cached opens for all three recoveries.
1089 * Check if we need to update the current stateid.
1091 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1092 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1093 write_seqlock(&state->seqlock);
1094 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1095 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1096 write_sequnlock(&state->seqlock);
1103 * reclaim state on the server after a reboot.
1105 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1107 struct nfs_delegation *delegation;
1108 struct nfs4_opendata *opendata;
1109 fmode_t delegation_type = 0;
1112 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1113 if (IS_ERR(opendata))
1114 return PTR_ERR(opendata);
1115 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1116 opendata->o_arg.fh = NFS_FH(state->inode);
1118 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1119 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1120 delegation_type = delegation->type;
1122 opendata->o_arg.u.delegation_type = delegation_type;
1123 status = nfs4_open_recover(opendata, state);
1124 nfs4_opendata_put(opendata);
1128 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1130 struct nfs_server *server = NFS_SERVER(state->inode);
1131 struct nfs4_exception exception = { };
1134 err = _nfs4_do_open_reclaim(ctx, state);
1135 if (err != -NFS4ERR_DELAY)
1137 nfs4_handle_exception(server, err, &exception);
1138 } while (exception.retry);
1142 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1144 struct nfs_open_context *ctx;
1147 ctx = nfs4_state_find_open_context(state);
1149 return PTR_ERR(ctx);
1150 ret = nfs4_do_open_reclaim(ctx, state);
1151 put_nfs_open_context(ctx);
1155 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1157 struct nfs4_opendata *opendata;
1160 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1161 if (IS_ERR(opendata))
1162 return PTR_ERR(opendata);
1163 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1164 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1165 sizeof(opendata->o_arg.u.delegation.data));
1166 ret = nfs4_open_recover(opendata, state);
1167 nfs4_opendata_put(opendata);
1171 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1173 struct nfs4_exception exception = { };
1174 struct nfs_server *server = NFS_SERVER(state->inode);
1177 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1183 case -NFS4ERR_BADSESSION:
1184 case -NFS4ERR_BADSLOT:
1185 case -NFS4ERR_BAD_HIGH_SLOT:
1186 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1187 case -NFS4ERR_DEADSESSION:
1188 nfs4_schedule_state_recovery(
1189 server->nfs_client);
1191 case -NFS4ERR_STALE_CLIENTID:
1192 case -NFS4ERR_STALE_STATEID:
1193 case -NFS4ERR_EXPIRED:
1194 /* Don't recall a delegation if it was lost */
1195 nfs4_schedule_state_recovery(server->nfs_client);
1199 * The show must go on: exit, but mark the
1200 * stateid as needing recovery.
1202 case -NFS4ERR_ADMIN_REVOKED:
1203 case -NFS4ERR_BAD_STATEID:
1204 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1209 err = nfs4_handle_exception(server, err, &exception);
1210 } while (exception.retry);
1215 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1217 struct nfs4_opendata *data = calldata;
1219 data->rpc_status = task->tk_status;
1220 if (RPC_ASSASSINATED(task))
1222 if (data->rpc_status == 0) {
1223 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1224 sizeof(data->o_res.stateid.data));
1225 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1226 renew_lease(data->o_res.server, data->timestamp);
1231 static void nfs4_open_confirm_release(void *calldata)
1233 struct nfs4_opendata *data = calldata;
1234 struct nfs4_state *state = NULL;
1236 /* If this request hasn't been cancelled, do nothing */
1237 if (data->cancelled == 0)
1239 /* In case of error, no cleanup! */
1240 if (!data->rpc_done)
1242 state = nfs4_opendata_to_nfs4_state(data);
1244 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1246 nfs4_opendata_put(data);
1249 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1250 .rpc_call_done = nfs4_open_confirm_done,
1251 .rpc_release = nfs4_open_confirm_release,
1255 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1257 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1259 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1260 struct rpc_task *task;
1261 struct rpc_message msg = {
1262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1263 .rpc_argp = &data->c_arg,
1264 .rpc_resp = &data->c_res,
1265 .rpc_cred = data->owner->so_cred,
1267 struct rpc_task_setup task_setup_data = {
1268 .rpc_client = server->client,
1269 .rpc_message = &msg,
1270 .callback_ops = &nfs4_open_confirm_ops,
1271 .callback_data = data,
1272 .workqueue = nfsiod_workqueue,
1273 .flags = RPC_TASK_ASYNC,
1277 kref_get(&data->kref);
1279 data->rpc_status = 0;
1280 data->timestamp = jiffies;
1281 task = rpc_run_task(&task_setup_data);
1283 return PTR_ERR(task);
1284 status = nfs4_wait_for_completion_rpc_task(task);
1286 data->cancelled = 1;
1289 status = data->rpc_status;
1294 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1296 struct nfs4_opendata *data = calldata;
1297 struct nfs4_state_owner *sp = data->owner;
1299 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1302 * Check if we still need to send an OPEN call, or if we can use
1303 * a delegation instead.
1305 if (data->state != NULL) {
1306 struct nfs_delegation *delegation;
1308 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1311 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1312 if (delegation != NULL &&
1313 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1319 /* Update sequence id. */
1320 data->o_arg.id = sp->so_owner_id.id;
1321 data->o_arg.clientid = sp->so_client->cl_clientid;
1322 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1323 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1324 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1326 data->timestamp = jiffies;
1327 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1328 &data->o_arg.seq_args,
1329 &data->o_res.seq_res, 1, task))
1331 rpc_call_start(task);
1334 task->tk_action = NULL;
1338 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1340 struct nfs4_opendata *data = calldata;
1342 data->rpc_status = task->tk_status;
1344 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1347 if (RPC_ASSASSINATED(task))
1349 if (task->tk_status == 0) {
1350 switch (data->o_res.f_attr->mode & S_IFMT) {
1354 data->rpc_status = -ELOOP;
1357 data->rpc_status = -EISDIR;
1360 data->rpc_status = -ENOTDIR;
1362 renew_lease(data->o_res.server, data->timestamp);
1363 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1364 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1369 static void nfs4_open_release(void *calldata)
1371 struct nfs4_opendata *data = calldata;
1372 struct nfs4_state *state = NULL;
1374 /* If this request hasn't been cancelled, do nothing */
1375 if (data->cancelled == 0)
1377 /* In case of error, no cleanup! */
1378 if (data->rpc_status != 0 || !data->rpc_done)
1380 /* In case we need an open_confirm, no cleanup! */
1381 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1383 state = nfs4_opendata_to_nfs4_state(data);
1385 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1387 nfs4_opendata_put(data);
1390 static const struct rpc_call_ops nfs4_open_ops = {
1391 .rpc_call_prepare = nfs4_open_prepare,
1392 .rpc_call_done = nfs4_open_done,
1393 .rpc_release = nfs4_open_release,
1397 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1399 static int _nfs4_proc_open(struct nfs4_opendata *data)
1401 struct inode *dir = data->dir->d_inode;
1402 struct nfs_server *server = NFS_SERVER(dir);
1403 struct nfs_openargs *o_arg = &data->o_arg;
1404 struct nfs_openres *o_res = &data->o_res;
1405 struct rpc_task *task;
1406 struct rpc_message msg = {
1407 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1410 .rpc_cred = data->owner->so_cred,
1412 struct rpc_task_setup task_setup_data = {
1413 .rpc_client = server->client,
1414 .rpc_message = &msg,
1415 .callback_ops = &nfs4_open_ops,
1416 .callback_data = data,
1417 .workqueue = nfsiod_workqueue,
1418 .flags = RPC_TASK_ASYNC,
1422 kref_get(&data->kref);
1424 data->rpc_status = 0;
1425 data->cancelled = 0;
1426 task = rpc_run_task(&task_setup_data);
1428 return PTR_ERR(task);
1429 status = nfs4_wait_for_completion_rpc_task(task);
1431 data->cancelled = 1;
1434 status = data->rpc_status;
1436 if (status != 0 || !data->rpc_done)
1439 if (o_arg->open_flags & O_CREAT) {
1440 update_changeattr(dir, &o_res->cinfo);
1441 nfs_post_op_update_inode(dir, o_res->dir_attr);
1443 nfs_refresh_inode(dir, o_res->dir_attr);
1444 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1445 status = _nfs4_proc_open_confirm(data);
1449 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1450 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1454 static int nfs4_recover_expired_lease(struct nfs_server *server)
1456 struct nfs_client *clp = server->nfs_client;
1460 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1461 ret = nfs4_wait_clnt_recover(clp);
1464 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1465 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1467 nfs4_schedule_state_recovery(clp);
1475 * reclaim state on the server after a network partition.
1476 * Assumes caller holds the appropriate lock
1478 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1480 struct nfs4_opendata *opendata;
1483 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1484 if (IS_ERR(opendata))
1485 return PTR_ERR(opendata);
1486 ret = nfs4_open_recover(opendata, state);
1488 d_drop(ctx->path.dentry);
1489 nfs4_opendata_put(opendata);
1493 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1495 struct nfs_server *server = NFS_SERVER(state->inode);
1496 struct nfs4_exception exception = { };
1500 err = _nfs4_open_expired(ctx, state);
1504 case -NFS4ERR_GRACE:
1505 case -NFS4ERR_DELAY:
1506 nfs4_handle_exception(server, err, &exception);
1509 } while (exception.retry);
1514 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1516 struct nfs_open_context *ctx;
1519 ctx = nfs4_state_find_open_context(state);
1521 return PTR_ERR(ctx);
1522 ret = nfs4_do_open_expired(ctx, state);
1523 put_nfs_open_context(ctx);
1528 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1529 * fields corresponding to attributes that were used to store the verifier.
1530 * Make sure we clobber those fields in the later setattr call
1532 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1534 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1535 !(sattr->ia_valid & ATTR_ATIME_SET))
1536 sattr->ia_valid |= ATTR_ATIME;
1538 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1539 !(sattr->ia_valid & ATTR_MTIME_SET))
1540 sattr->ia_valid |= ATTR_MTIME;
1544 * Returns a referenced nfs4_state
1546 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)
1548 struct nfs4_state_owner *sp;
1549 struct nfs4_state *state = NULL;
1550 struct nfs_server *server = NFS_SERVER(dir);
1551 struct nfs4_opendata *opendata;
1554 /* Protect against reboot recovery conflicts */
1556 if (!(sp = nfs4_get_state_owner(server, cred))) {
1557 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1560 status = nfs4_recover_expired_lease(server);
1562 goto err_put_state_owner;
1563 if (path->dentry->d_inode != NULL)
1564 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1566 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1567 if (opendata == NULL)
1568 goto err_put_state_owner;
1570 if (path->dentry->d_inode != NULL)
1571 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1573 status = _nfs4_proc_open(opendata);
1575 goto err_opendata_put;
1577 if (opendata->o_arg.open_flags & O_EXCL)
1578 nfs4_exclusive_attrset(opendata, sattr);
1580 state = nfs4_opendata_to_nfs4_state(opendata);
1581 status = PTR_ERR(state);
1583 goto err_opendata_put;
1584 nfs4_opendata_put(opendata);
1585 nfs4_put_state_owner(sp);
1589 nfs4_opendata_put(opendata);
1590 err_put_state_owner:
1591 nfs4_put_state_owner(sp);
1598 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)
1600 struct nfs4_exception exception = { };
1601 struct nfs4_state *res;
1605 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1608 /* NOTE: BAD_SEQID means the server and client disagree about the
1609 * book-keeping w.r.t. state-changing operations
1610 * (OPEN/CLOSE/LOCK/LOCKU...)
1611 * It is actually a sign of a bug on the client or on the server.
1613 * If we receive a BAD_SEQID error in the particular case of
1614 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1615 * have unhashed the old state_owner for us, and that we can
1616 * therefore safely retry using a new one. We should still warn
1617 * the user though...
1619 if (status == -NFS4ERR_BAD_SEQID) {
1620 printk(KERN_WARNING "NFS: v4 server %s "
1621 " returned a bad sequence-id error!\n",
1622 NFS_SERVER(dir)->nfs_client->cl_hostname);
1623 exception.retry = 1;
1627 * BAD_STATEID on OPEN means that the server cancelled our
1628 * state before it received the OPEN_CONFIRM.
1629 * Recover by retrying the request as per the discussion
1630 * on Page 181 of RFC3530.
1632 if (status == -NFS4ERR_BAD_STATEID) {
1633 exception.retry = 1;
1636 if (status == -EAGAIN) {
1637 /* We must have found a delegation */
1638 exception.retry = 1;
1641 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1642 status, &exception));
1643 } while (exception.retry);
1647 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1648 struct nfs_fattr *fattr, struct iattr *sattr,
1649 struct nfs4_state *state)
1651 struct nfs_server *server = NFS_SERVER(inode);
1652 struct nfs_setattrargs arg = {
1653 .fh = NFS_FH(inode),
1656 .bitmask = server->attr_bitmask,
1658 struct nfs_setattrres res = {
1662 struct rpc_message msg = {
1663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1668 unsigned long timestamp = jiffies;
1671 nfs_fattr_init(fattr);
1673 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1674 /* Use that stateid */
1675 } else if (state != NULL) {
1676 nfs4_copy_stateid(&arg.stateid, state, current->files);
1678 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1680 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1681 if (status == 0 && state != NULL)
1682 renew_lease(server, timestamp);
1686 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1687 struct nfs_fattr *fattr, struct iattr *sattr,
1688 struct nfs4_state *state)
1690 struct nfs_server *server = NFS_SERVER(inode);
1691 struct nfs4_exception exception = { };
1694 err = nfs4_handle_exception(server,
1695 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1697 } while (exception.retry);
1701 struct nfs4_closedata {
1703 struct inode *inode;
1704 struct nfs4_state *state;
1705 struct nfs_closeargs arg;
1706 struct nfs_closeres res;
1707 struct nfs_fattr fattr;
1708 unsigned long timestamp;
1711 static void nfs4_free_closedata(void *data)
1713 struct nfs4_closedata *calldata = data;
1714 struct nfs4_state_owner *sp = calldata->state->owner;
1716 nfs4_put_open_state(calldata->state);
1717 nfs_free_seqid(calldata->arg.seqid);
1718 nfs4_put_state_owner(sp);
1719 path_put(&calldata->path);
1723 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1726 spin_lock(&state->owner->so_lock);
1727 if (!(fmode & FMODE_READ))
1728 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1729 if (!(fmode & FMODE_WRITE))
1730 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1731 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1732 spin_unlock(&state->owner->so_lock);
1735 static void nfs4_close_done(struct rpc_task *task, void *data)
1737 struct nfs4_closedata *calldata = data;
1738 struct nfs4_state *state = calldata->state;
1739 struct nfs_server *server = NFS_SERVER(calldata->inode);
1741 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
1742 if (RPC_ASSASSINATED(task))
1744 /* hmm. we are done with the inode, and in the process of freeing
1745 * the state_owner. we keep this around to process errors
1747 switch (task->tk_status) {
1749 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1750 renew_lease(server, calldata->timestamp);
1751 nfs4_close_clear_stateid_flags(state,
1752 calldata->arg.fmode);
1754 case -NFS4ERR_STALE_STATEID:
1755 case -NFS4ERR_OLD_STATEID:
1756 case -NFS4ERR_BAD_STATEID:
1757 case -NFS4ERR_EXPIRED:
1758 if (calldata->arg.fmode == 0)
1761 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1762 nfs_restart_rpc(task, server->nfs_client);
1766 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1769 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1771 struct nfs4_closedata *calldata = data;
1772 struct nfs4_state *state = calldata->state;
1775 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1778 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1779 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
1780 spin_lock(&state->owner->so_lock);
1781 /* Calculate the change in open mode */
1782 if (state->n_rdwr == 0) {
1783 if (state->n_rdonly == 0) {
1784 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1785 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1786 calldata->arg.fmode &= ~FMODE_READ;
1788 if (state->n_wronly == 0) {
1789 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1790 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1791 calldata->arg.fmode &= ~FMODE_WRITE;
1794 spin_unlock(&state->owner->so_lock);
1797 /* Note: exit _without_ calling nfs4_close_done */
1798 task->tk_action = NULL;
1802 if (calldata->arg.fmode == 0)
1803 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1805 nfs_fattr_init(calldata->res.fattr);
1806 calldata->timestamp = jiffies;
1807 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1808 &calldata->arg.seq_args, &calldata->res.seq_res,
1811 rpc_call_start(task);
1814 static const struct rpc_call_ops nfs4_close_ops = {
1815 .rpc_call_prepare = nfs4_close_prepare,
1816 .rpc_call_done = nfs4_close_done,
1817 .rpc_release = nfs4_free_closedata,
1821 * It is possible for data to be read/written from a mem-mapped file
1822 * after the sys_close call (which hits the vfs layer as a flush).
1823 * This means that we can't safely call nfsv4 close on a file until
1824 * the inode is cleared. This in turn means that we are not good
1825 * NFSv4 citizens - we do not indicate to the server to update the file's
1826 * share state even when we are done with one of the three share
1827 * stateid's in the inode.
1829 * NOTE: Caller must be holding the sp->so_owner semaphore!
1831 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1833 struct nfs_server *server = NFS_SERVER(state->inode);
1834 struct nfs4_closedata *calldata;
1835 struct nfs4_state_owner *sp = state->owner;
1836 struct rpc_task *task;
1837 struct rpc_message msg = {
1838 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1839 .rpc_cred = state->owner->so_cred,
1841 struct rpc_task_setup task_setup_data = {
1842 .rpc_client = server->client,
1843 .rpc_message = &msg,
1844 .callback_ops = &nfs4_close_ops,
1845 .workqueue = nfsiod_workqueue,
1846 .flags = RPC_TASK_ASYNC,
1848 int status = -ENOMEM;
1850 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1851 if (calldata == NULL)
1853 calldata->inode = state->inode;
1854 calldata->state = state;
1855 calldata->arg.fh = NFS_FH(state->inode);
1856 calldata->arg.stateid = &state->open_stateid;
1857 if (nfs4_has_session(server->nfs_client))
1858 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1859 /* Serialization for the sequence id */
1860 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1861 if (calldata->arg.seqid == NULL)
1862 goto out_free_calldata;
1863 calldata->arg.fmode = 0;
1864 calldata->arg.bitmask = server->cache_consistency_bitmask;
1865 calldata->res.fattr = &calldata->fattr;
1866 calldata->res.seqid = calldata->arg.seqid;
1867 calldata->res.server = server;
1868 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
1869 calldata->path.mnt = mntget(path->mnt);
1870 calldata->path.dentry = dget(path->dentry);
1872 msg.rpc_argp = &calldata->arg,
1873 msg.rpc_resp = &calldata->res,
1874 task_setup_data.callback_data = calldata;
1875 task = rpc_run_task(&task_setup_data);
1877 return PTR_ERR(task);
1880 status = rpc_wait_for_completion_task(task);
1886 nfs4_put_open_state(state);
1887 nfs4_put_state_owner(sp);
1891 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1896 /* If the open_intent is for execute, we have an extra check to make */
1897 if (fmode & FMODE_EXEC) {
1898 ret = nfs_may_open(state->inode,
1899 state->owner->so_cred,
1900 nd->intent.open.flags);
1904 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1905 if (!IS_ERR(filp)) {
1906 struct nfs_open_context *ctx;
1907 ctx = nfs_file_open_context(filp);
1911 ret = PTR_ERR(filp);
1913 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1918 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1920 struct path path = {
1921 .mnt = nd->path.mnt,
1924 struct dentry *parent;
1926 struct rpc_cred *cred;
1927 struct nfs4_state *state;
1929 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1931 if (nd->flags & LOOKUP_CREATE) {
1932 attr.ia_mode = nd->intent.open.create_mode;
1933 attr.ia_valid = ATTR_MODE;
1934 if (!IS_POSIXACL(dir))
1935 attr.ia_mode &= ~current_umask();
1938 BUG_ON(nd->intent.open.flags & O_CREAT);
1941 cred = rpc_lookup_cred();
1943 return (struct dentry *)cred;
1944 parent = dentry->d_parent;
1945 /* Protect against concurrent sillydeletes */
1946 nfs_block_sillyrename(parent);
1947 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1949 if (IS_ERR(state)) {
1950 if (PTR_ERR(state) == -ENOENT) {
1951 d_add(dentry, NULL);
1952 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1954 nfs_unblock_sillyrename(parent);
1955 return (struct dentry *)state;
1957 res = d_add_unique(dentry, igrab(state->inode));
1960 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1961 nfs_unblock_sillyrename(parent);
1962 nfs4_intent_set_file(nd, &path, state, fmode);
1967 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1969 struct path path = {
1970 .mnt = nd->path.mnt,
1973 struct rpc_cred *cred;
1974 struct nfs4_state *state;
1975 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1977 cred = rpc_lookup_cred();
1979 return PTR_ERR(cred);
1980 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1982 if (IS_ERR(state)) {
1983 switch (PTR_ERR(state)) {
1989 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1995 if (state->inode == dentry->d_inode) {
1996 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1997 nfs4_intent_set_file(nd, &path, state, fmode);
2000 nfs4_close_sync(&path, state, fmode);
2006 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2008 if (ctx->state == NULL)
2011 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2013 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2016 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2018 struct nfs4_server_caps_arg args = {
2021 struct nfs4_server_caps_res res = {};
2022 struct rpc_message msg = {
2023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2029 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2031 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2032 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2033 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2034 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2035 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2036 NFS_CAP_CTIME|NFS_CAP_MTIME);
2037 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2038 server->caps |= NFS_CAP_ACLS;
2039 if (res.has_links != 0)
2040 server->caps |= NFS_CAP_HARDLINKS;
2041 if (res.has_symlinks != 0)
2042 server->caps |= NFS_CAP_SYMLINKS;
2043 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2044 server->caps |= NFS_CAP_FILEID;
2045 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2046 server->caps |= NFS_CAP_MODE;
2047 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2048 server->caps |= NFS_CAP_NLINK;
2049 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2050 server->caps |= NFS_CAP_OWNER;
2051 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2052 server->caps |= NFS_CAP_OWNER_GROUP;
2053 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2054 server->caps |= NFS_CAP_ATIME;
2055 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2056 server->caps |= NFS_CAP_CTIME;
2057 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2058 server->caps |= NFS_CAP_MTIME;
2060 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2061 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2062 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2063 server->acl_bitmask = res.acl_bitmask;
2069 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2071 struct nfs4_exception exception = { };
2074 err = nfs4_handle_exception(server,
2075 _nfs4_server_capabilities(server, fhandle),
2077 } while (exception.retry);
2081 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2082 struct nfs_fsinfo *info)
2084 struct nfs4_lookup_root_arg args = {
2085 .bitmask = nfs4_fattr_bitmap,
2087 struct nfs4_lookup_res res = {
2089 .fattr = info->fattr,
2092 struct rpc_message msg = {
2093 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2098 nfs_fattr_init(info->fattr);
2099 return nfs4_call_sync(server, &msg, &args, &res, 0);
2102 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2103 struct nfs_fsinfo *info)
2105 struct nfs4_exception exception = { };
2108 err = nfs4_handle_exception(server,
2109 _nfs4_lookup_root(server, fhandle, info),
2111 } while (exception.retry);
2116 * get the file handle for the "/" directory on the server
2118 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2119 struct nfs_fsinfo *info)
2123 status = nfs4_lookup_root(server, fhandle, info);
2125 status = nfs4_server_capabilities(server, fhandle);
2127 status = nfs4_do_fsinfo(server, fhandle, info);
2128 return nfs4_map_errors(status);
2132 * Get locations and (maybe) other attributes of a referral.
2133 * Note that we'll actually follow the referral later when
2134 * we detect fsid mismatch in inode revalidation
2136 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2138 int status = -ENOMEM;
2139 struct page *page = NULL;
2140 struct nfs4_fs_locations *locations = NULL;
2142 page = alloc_page(GFP_KERNEL);
2145 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2146 if (locations == NULL)
2149 status = nfs4_proc_fs_locations(dir, name, locations, page);
2152 /* Make sure server returned a different fsid for the referral */
2153 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2154 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2159 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2160 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2162 fattr->mode = S_IFDIR;
2163 memset(fhandle, 0, sizeof(struct nfs_fh));
2172 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2174 struct nfs4_getattr_arg args = {
2176 .bitmask = server->attr_bitmask,
2178 struct nfs4_getattr_res res = {
2182 struct rpc_message msg = {
2183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2188 nfs_fattr_init(fattr);
2189 return nfs4_call_sync(server, &msg, &args, &res, 0);
2192 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2194 struct nfs4_exception exception = { };
2197 err = nfs4_handle_exception(server,
2198 _nfs4_proc_getattr(server, fhandle, fattr),
2200 } while (exception.retry);
2205 * The file is not closed if it is opened due to the a request to change
2206 * the size of the file. The open call will not be needed once the
2207 * VFS layer lookup-intents are implemented.
2209 * Close is called when the inode is destroyed.
2210 * If we haven't opened the file for O_WRONLY, we
2211 * need to in the size_change case to obtain a stateid.
2214 * Because OPEN is always done by name in nfsv4, it is
2215 * possible that we opened a different file by the same
2216 * name. We can recognize this race condition, but we
2217 * can't do anything about it besides returning an error.
2219 * This will be fixed with VFS changes (lookup-intent).
2222 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2223 struct iattr *sattr)
2225 struct inode *inode = dentry->d_inode;
2226 struct rpc_cred *cred = NULL;
2227 struct nfs4_state *state = NULL;
2230 nfs_fattr_init(fattr);
2232 /* Search for an existing open(O_WRITE) file */
2233 if (sattr->ia_valid & ATTR_FILE) {
2234 struct nfs_open_context *ctx;
2236 ctx = nfs_file_open_context(sattr->ia_file);
2243 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2245 nfs_setattr_update_inode(inode, sattr);
2249 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2250 const struct qstr *name, struct nfs_fh *fhandle,
2251 struct nfs_fattr *fattr)
2254 struct nfs4_lookup_arg args = {
2255 .bitmask = server->attr_bitmask,
2259 struct nfs4_lookup_res res = {
2264 struct rpc_message msg = {
2265 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2270 nfs_fattr_init(fattr);
2272 dprintk("NFS call lookupfh %s\n", name->name);
2273 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2274 dprintk("NFS reply lookupfh: %d\n", status);
2278 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2279 struct qstr *name, struct nfs_fh *fhandle,
2280 struct nfs_fattr *fattr)
2282 struct nfs4_exception exception = { };
2285 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2287 if (err == -NFS4ERR_MOVED) {
2291 err = nfs4_handle_exception(server, err, &exception);
2292 } while (exception.retry);
2296 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2297 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2301 dprintk("NFS call lookup %s\n", name->name);
2302 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2303 if (status == -NFS4ERR_MOVED)
2304 status = nfs4_get_referral(dir, name, fattr, fhandle);
2305 dprintk("NFS reply lookup: %d\n", status);
2309 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2311 struct nfs4_exception exception = { };
2314 err = nfs4_handle_exception(NFS_SERVER(dir),
2315 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2317 } while (exception.retry);
2321 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2323 struct nfs_server *server = NFS_SERVER(inode);
2324 struct nfs_fattr fattr;
2325 struct nfs4_accessargs args = {
2326 .fh = NFS_FH(inode),
2327 .bitmask = server->attr_bitmask,
2329 struct nfs4_accessres res = {
2333 struct rpc_message msg = {
2334 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2337 .rpc_cred = entry->cred,
2339 int mode = entry->mask;
2343 * Determine which access bits we want to ask for...
2345 if (mode & MAY_READ)
2346 args.access |= NFS4_ACCESS_READ;
2347 if (S_ISDIR(inode->i_mode)) {
2348 if (mode & MAY_WRITE)
2349 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2350 if (mode & MAY_EXEC)
2351 args.access |= NFS4_ACCESS_LOOKUP;
2353 if (mode & MAY_WRITE)
2354 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2355 if (mode & MAY_EXEC)
2356 args.access |= NFS4_ACCESS_EXECUTE;
2358 nfs_fattr_init(&fattr);
2359 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2362 if (res.access & NFS4_ACCESS_READ)
2363 entry->mask |= MAY_READ;
2364 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2365 entry->mask |= MAY_WRITE;
2366 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2367 entry->mask |= MAY_EXEC;
2368 nfs_refresh_inode(inode, &fattr);
2373 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2375 struct nfs4_exception exception = { };
2378 err = nfs4_handle_exception(NFS_SERVER(inode),
2379 _nfs4_proc_access(inode, entry),
2381 } while (exception.retry);
2386 * TODO: For the time being, we don't try to get any attributes
2387 * along with any of the zero-copy operations READ, READDIR,
2390 * In the case of the first three, we want to put the GETATTR
2391 * after the read-type operation -- this is because it is hard
2392 * to predict the length of a GETATTR response in v4, and thus
2393 * align the READ data correctly. This means that the GETATTR
2394 * may end up partially falling into the page cache, and we should
2395 * shift it into the 'tail' of the xdr_buf before processing.
2396 * To do this efficiently, we need to know the total length
2397 * of data received, which doesn't seem to be available outside
2400 * In the case of WRITE, we also want to put the GETATTR after
2401 * the operation -- in this case because we want to make sure
2402 * we get the post-operation mtime and size. This means that
2403 * we can't use xdr_encode_pages() as written: we need a variant
2404 * of it which would leave room in the 'tail' iovec.
2406 * Both of these changes to the XDR layer would in fact be quite
2407 * minor, but I decided to leave them for a subsequent patch.
2409 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2410 unsigned int pgbase, unsigned int pglen)
2412 struct nfs4_readlink args = {
2413 .fh = NFS_FH(inode),
2418 struct nfs4_readlink_res res;
2419 struct rpc_message msg = {
2420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2425 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2428 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2429 unsigned int pgbase, unsigned int pglen)
2431 struct nfs4_exception exception = { };
2434 err = nfs4_handle_exception(NFS_SERVER(inode),
2435 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2437 } while (exception.retry);
2443 * We will need to arrange for the VFS layer to provide an atomic open.
2444 * Until then, this create/open method is prone to inefficiency and race
2445 * conditions due to the lookup, create, and open VFS calls from sys_open()
2446 * placed on the wire.
2448 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2449 * The file will be opened again in the subsequent VFS open call
2450 * (nfs4_proc_file_open).
2452 * The open for read will just hang around to be used by any process that
2453 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2457 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2458 int flags, struct nameidata *nd)
2460 struct path path = {
2461 .mnt = nd->path.mnt,
2464 struct nfs4_state *state;
2465 struct rpc_cred *cred;
2466 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2469 cred = rpc_lookup_cred();
2471 status = PTR_ERR(cred);
2474 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2476 if (IS_ERR(state)) {
2477 status = PTR_ERR(state);
2480 d_add(dentry, igrab(state->inode));
2481 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2482 if (flags & O_EXCL) {
2483 struct nfs_fattr fattr;
2484 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2486 nfs_setattr_update_inode(state->inode, sattr);
2487 nfs_post_op_update_inode(state->inode, &fattr);
2489 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2490 status = nfs4_intent_set_file(nd, &path, state, fmode);
2492 nfs4_close_sync(&path, state, fmode);
2499 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2501 struct nfs_server *server = NFS_SERVER(dir);
2502 struct nfs_removeargs args = {
2504 .name.len = name->len,
2505 .name.name = name->name,
2506 .bitmask = server->attr_bitmask,
2508 struct nfs_removeres res = {
2511 struct rpc_message msg = {
2512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2518 nfs_fattr_init(&res.dir_attr);
2519 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2521 update_changeattr(dir, &res.cinfo);
2522 nfs_post_op_update_inode(dir, &res.dir_attr);
2527 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2529 struct nfs4_exception exception = { };
2532 err = nfs4_handle_exception(NFS_SERVER(dir),
2533 _nfs4_proc_remove(dir, name),
2535 } while (exception.retry);
2539 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2541 struct nfs_server *server = NFS_SERVER(dir);
2542 struct nfs_removeargs *args = msg->rpc_argp;
2543 struct nfs_removeres *res = msg->rpc_resp;
2545 args->bitmask = server->cache_consistency_bitmask;
2546 res->server = server;
2547 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2550 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2552 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2554 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
2555 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2557 update_changeattr(dir, &res->cinfo);
2558 nfs_post_op_update_inode(dir, &res->dir_attr);
2562 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2563 struct inode *new_dir, struct qstr *new_name)
2565 struct nfs_server *server = NFS_SERVER(old_dir);
2566 struct nfs4_rename_arg arg = {
2567 .old_dir = NFS_FH(old_dir),
2568 .new_dir = NFS_FH(new_dir),
2569 .old_name = old_name,
2570 .new_name = new_name,
2571 .bitmask = server->attr_bitmask,
2573 struct nfs_fattr old_fattr, new_fattr;
2574 struct nfs4_rename_res res = {
2576 .old_fattr = &old_fattr,
2577 .new_fattr = &new_fattr,
2579 struct rpc_message msg = {
2580 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2586 nfs_fattr_init(res.old_fattr);
2587 nfs_fattr_init(res.new_fattr);
2588 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2591 update_changeattr(old_dir, &res.old_cinfo);
2592 nfs_post_op_update_inode(old_dir, res.old_fattr);
2593 update_changeattr(new_dir, &res.new_cinfo);
2594 nfs_post_op_update_inode(new_dir, res.new_fattr);
2599 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2600 struct inode *new_dir, struct qstr *new_name)
2602 struct nfs4_exception exception = { };
2605 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2606 _nfs4_proc_rename(old_dir, old_name,
2609 } while (exception.retry);
2613 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2615 struct nfs_server *server = NFS_SERVER(inode);
2616 struct nfs4_link_arg arg = {
2617 .fh = NFS_FH(inode),
2618 .dir_fh = NFS_FH(dir),
2620 .bitmask = server->attr_bitmask,
2622 struct nfs_fattr fattr, dir_attr;
2623 struct nfs4_link_res res = {
2626 .dir_attr = &dir_attr,
2628 struct rpc_message msg = {
2629 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2635 nfs_fattr_init(res.fattr);
2636 nfs_fattr_init(res.dir_attr);
2637 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2639 update_changeattr(dir, &res.cinfo);
2640 nfs_post_op_update_inode(dir, res.dir_attr);
2641 nfs_post_op_update_inode(inode, res.fattr);
2647 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2649 struct nfs4_exception exception = { };
2652 err = nfs4_handle_exception(NFS_SERVER(inode),
2653 _nfs4_proc_link(inode, dir, name),
2655 } while (exception.retry);
2659 struct nfs4_createdata {
2660 struct rpc_message msg;
2661 struct nfs4_create_arg arg;
2662 struct nfs4_create_res res;
2664 struct nfs_fattr fattr;
2665 struct nfs_fattr dir_fattr;
2668 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2669 struct qstr *name, struct iattr *sattr, u32 ftype)
2671 struct nfs4_createdata *data;
2673 data = kzalloc(sizeof(*data), GFP_KERNEL);
2675 struct nfs_server *server = NFS_SERVER(dir);
2677 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2678 data->msg.rpc_argp = &data->arg;
2679 data->msg.rpc_resp = &data->res;
2680 data->arg.dir_fh = NFS_FH(dir);
2681 data->arg.server = server;
2682 data->arg.name = name;
2683 data->arg.attrs = sattr;
2684 data->arg.ftype = ftype;
2685 data->arg.bitmask = server->attr_bitmask;
2686 data->res.server = server;
2687 data->res.fh = &data->fh;
2688 data->res.fattr = &data->fattr;
2689 data->res.dir_fattr = &data->dir_fattr;
2690 nfs_fattr_init(data->res.fattr);
2691 nfs_fattr_init(data->res.dir_fattr);
2696 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2698 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2699 &data->arg, &data->res, 1);
2701 update_changeattr(dir, &data->res.dir_cinfo);
2702 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2703 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2708 static void nfs4_free_createdata(struct nfs4_createdata *data)
2713 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2714 struct page *page, unsigned int len, struct iattr *sattr)
2716 struct nfs4_createdata *data;
2717 int status = -ENAMETOOLONG;
2719 if (len > NFS4_MAXPATHLEN)
2723 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2727 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2728 data->arg.u.symlink.pages = &page;
2729 data->arg.u.symlink.len = len;
2731 status = nfs4_do_create(dir, dentry, data);
2733 nfs4_free_createdata(data);
2738 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2739 struct page *page, unsigned int len, struct iattr *sattr)
2741 struct nfs4_exception exception = { };
2744 err = nfs4_handle_exception(NFS_SERVER(dir),
2745 _nfs4_proc_symlink(dir, dentry, page,
2748 } while (exception.retry);
2752 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2753 struct iattr *sattr)
2755 struct nfs4_createdata *data;
2756 int status = -ENOMEM;
2758 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2762 status = nfs4_do_create(dir, dentry, data);
2764 nfs4_free_createdata(data);
2769 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2770 struct iattr *sattr)
2772 struct nfs4_exception exception = { };
2775 err = nfs4_handle_exception(NFS_SERVER(dir),
2776 _nfs4_proc_mkdir(dir, dentry, sattr),
2778 } while (exception.retry);
2782 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2783 u64 cookie, struct page *page, unsigned int count, int plus)
2785 struct inode *dir = dentry->d_inode;
2786 struct nfs4_readdir_arg args = {
2791 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2793 struct nfs4_readdir_res res;
2794 struct rpc_message msg = {
2795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2802 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2803 dentry->d_parent->d_name.name,
2804 dentry->d_name.name,
2805 (unsigned long long)cookie);
2806 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2807 res.pgbase = args.pgbase;
2808 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2810 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2812 nfs_invalidate_atime(dir);
2814 dprintk("%s: returns %d\n", __func__, status);
2818 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2819 u64 cookie, struct page *page, unsigned int count, int plus)
2821 struct nfs4_exception exception = { };
2824 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2825 _nfs4_proc_readdir(dentry, cred, cookie,
2828 } while (exception.retry);
2832 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2833 struct iattr *sattr, dev_t rdev)
2835 struct nfs4_createdata *data;
2836 int mode = sattr->ia_mode;
2837 int status = -ENOMEM;
2839 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2840 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2842 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2847 data->arg.ftype = NF4FIFO;
2848 else if (S_ISBLK(mode)) {
2849 data->arg.ftype = NF4BLK;
2850 data->arg.u.device.specdata1 = MAJOR(rdev);
2851 data->arg.u.device.specdata2 = MINOR(rdev);
2853 else if (S_ISCHR(mode)) {
2854 data->arg.ftype = NF4CHR;
2855 data->arg.u.device.specdata1 = MAJOR(rdev);
2856 data->arg.u.device.specdata2 = MINOR(rdev);
2859 status = nfs4_do_create(dir, dentry, data);
2861 nfs4_free_createdata(data);
2866 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2867 struct iattr *sattr, dev_t rdev)
2869 struct nfs4_exception exception = { };
2872 err = nfs4_handle_exception(NFS_SERVER(dir),
2873 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2875 } while (exception.retry);
2879 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2880 struct nfs_fsstat *fsstat)
2882 struct nfs4_statfs_arg args = {
2884 .bitmask = server->attr_bitmask,
2886 struct nfs4_statfs_res res = {
2889 struct rpc_message msg = {
2890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2895 nfs_fattr_init(fsstat->fattr);
2896 return nfs4_call_sync(server, &msg, &args, &res, 0);
2899 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2901 struct nfs4_exception exception = { };
2904 err = nfs4_handle_exception(server,
2905 _nfs4_proc_statfs(server, fhandle, fsstat),
2907 } while (exception.retry);
2911 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2912 struct nfs_fsinfo *fsinfo)
2914 struct nfs4_fsinfo_arg args = {
2916 .bitmask = server->attr_bitmask,
2918 struct nfs4_fsinfo_res res = {
2921 struct rpc_message msg = {
2922 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2927 return nfs4_call_sync(server, &msg, &args, &res, 0);
2930 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2932 struct nfs4_exception exception = { };
2936 err = nfs4_handle_exception(server,
2937 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2939 } while (exception.retry);
2943 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2945 nfs_fattr_init(fsinfo->fattr);
2946 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2949 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2950 struct nfs_pathconf *pathconf)
2952 struct nfs4_pathconf_arg args = {
2954 .bitmask = server->attr_bitmask,
2956 struct nfs4_pathconf_res res = {
2957 .pathconf = pathconf,
2959 struct rpc_message msg = {
2960 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2965 /* None of the pathconf attributes are mandatory to implement */
2966 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2967 memset(pathconf, 0, sizeof(*pathconf));
2971 nfs_fattr_init(pathconf->fattr);
2972 return nfs4_call_sync(server, &msg, &args, &res, 0);
2975 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2976 struct nfs_pathconf *pathconf)
2978 struct nfs4_exception exception = { };
2982 err = nfs4_handle_exception(server,
2983 _nfs4_proc_pathconf(server, fhandle, pathconf),
2985 } while (exception.retry);
2989 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2991 struct nfs_server *server = NFS_SERVER(data->inode);
2993 dprintk("--> %s\n", __func__);
2995 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2997 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
2998 nfs_restart_rpc(task, server->nfs_client);
3002 nfs_invalidate_atime(data->inode);
3003 if (task->tk_status > 0)
3004 renew_lease(server, data->timestamp);
3008 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3010 data->timestamp = jiffies;
3011 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3014 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3016 struct inode *inode = data->inode;
3018 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3021 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3022 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3025 if (task->tk_status >= 0) {
3026 renew_lease(NFS_SERVER(inode), data->timestamp);
3027 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3032 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3034 struct nfs_server *server = NFS_SERVER(data->inode);
3036 data->args.bitmask = server->cache_consistency_bitmask;
3037 data->res.server = server;
3038 data->timestamp = jiffies;
3040 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3043 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3045 struct inode *inode = data->inode;
3047 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3049 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3050 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3053 nfs_refresh_inode(inode, data->res.fattr);
3057 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3059 struct nfs_server *server = NFS_SERVER(data->inode);
3061 data->args.bitmask = server->cache_consistency_bitmask;
3062 data->res.server = server;
3063 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3067 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3068 * standalone procedure for queueing an asynchronous RENEW.
3070 static void nfs4_renew_done(struct rpc_task *task, void *data)
3072 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
3073 unsigned long timestamp = (unsigned long)data;
3075 if (task->tk_status < 0) {
3076 /* Unless we're shutting down, schedule state recovery! */
3077 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3078 nfs4_schedule_state_recovery(clp);
3081 spin_lock(&clp->cl_lock);
3082 if (time_before(clp->cl_last_renewal,timestamp))
3083 clp->cl_last_renewal = timestamp;
3084 spin_unlock(&clp->cl_lock);
3087 static const struct rpc_call_ops nfs4_renew_ops = {
3088 .rpc_call_done = nfs4_renew_done,
3091 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3093 struct rpc_message msg = {
3094 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3099 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3100 &nfs4_renew_ops, (void *)jiffies);
3103 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3105 struct rpc_message msg = {
3106 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3110 unsigned long now = jiffies;
3113 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3116 spin_lock(&clp->cl_lock);
3117 if (time_before(clp->cl_last_renewal,now))
3118 clp->cl_last_renewal = now;
3119 spin_unlock(&clp->cl_lock);
3123 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3125 return (server->caps & NFS_CAP_ACLS)
3126 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3127 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3130 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3131 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3134 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3136 static void buf_to_pages(const void *buf, size_t buflen,
3137 struct page **pages, unsigned int *pgbase)
3139 const void *p = buf;
3141 *pgbase = offset_in_page(buf);
3143 while (p < buf + buflen) {
3144 *(pages++) = virt_to_page(p);
3145 p += PAGE_CACHE_SIZE;
3149 struct nfs4_cached_acl {
3155 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3157 struct nfs_inode *nfsi = NFS_I(inode);
3159 spin_lock(&inode->i_lock);
3160 kfree(nfsi->nfs4_acl);
3161 nfsi->nfs4_acl = acl;
3162 spin_unlock(&inode->i_lock);
3165 static void nfs4_zap_acl_attr(struct inode *inode)
3167 nfs4_set_cached_acl(inode, NULL);
3170 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3172 struct nfs_inode *nfsi = NFS_I(inode);
3173 struct nfs4_cached_acl *acl;
3176 spin_lock(&inode->i_lock);
3177 acl = nfsi->nfs4_acl;
3180 if (buf == NULL) /* user is just asking for length */
3182 if (acl->cached == 0)
3184 ret = -ERANGE; /* see getxattr(2) man page */
3185 if (acl->len > buflen)
3187 memcpy(buf, acl->data, acl->len);
3191 spin_unlock(&inode->i_lock);
3195 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3197 struct nfs4_cached_acl *acl;
3199 if (buf && acl_len <= PAGE_SIZE) {
3200 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3204 memcpy(acl->data, buf, acl_len);
3206 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3213 nfs4_set_cached_acl(inode, acl);
3216 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3218 struct page *pages[NFS4ACL_MAXPAGES];
3219 struct nfs_getaclargs args = {
3220 .fh = NFS_FH(inode),
3224 struct nfs_getaclres res = {
3228 struct rpc_message msg = {
3229 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3233 struct page *localpage = NULL;
3236 if (buflen < PAGE_SIZE) {
3237 /* As long as we're doing a round trip to the server anyway,
3238 * let's be prepared for a page of acl data. */
3239 localpage = alloc_page(GFP_KERNEL);
3240 resp_buf = page_address(localpage);
3241 if (localpage == NULL)
3243 args.acl_pages[0] = localpage;
3244 args.acl_pgbase = 0;
3245 args.acl_len = PAGE_SIZE;
3248 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3250 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3253 if (res.acl_len > args.acl_len)
3254 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3256 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3259 if (res.acl_len > buflen)
3262 memcpy(buf, resp_buf, res.acl_len);
3267 __free_page(localpage);
3271 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3273 struct nfs4_exception exception = { };
3276 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3279 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3280 } while (exception.retry);
3284 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3286 struct nfs_server *server = NFS_SERVER(inode);
3289 if (!nfs4_server_supports_acls(server))
3291 ret = nfs_revalidate_inode(server, inode);
3294 ret = nfs4_read_cached_acl(inode, buf, buflen);
3297 return nfs4_get_acl_uncached(inode, buf, buflen);
3300 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3302 struct nfs_server *server = NFS_SERVER(inode);
3303 struct page *pages[NFS4ACL_MAXPAGES];
3304 struct nfs_setaclargs arg = {
3305 .fh = NFS_FH(inode),
3309 struct nfs_setaclres res;
3310 struct rpc_message msg = {
3311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3317 if (!nfs4_server_supports_acls(server))
3319 nfs_inode_return_delegation(inode);
3320 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3321 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3322 nfs_access_zap_cache(inode);
3323 nfs_zap_acl_cache(inode);
3327 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3329 struct nfs4_exception exception = { };
3332 err = nfs4_handle_exception(NFS_SERVER(inode),
3333 __nfs4_proc_set_acl(inode, buf, buflen),
3335 } while (exception.retry);
3340 _nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
3342 if (!clp || task->tk_status >= 0)
3344 switch(task->tk_status) {
3345 case -NFS4ERR_ADMIN_REVOKED:
3346 case -NFS4ERR_BAD_STATEID:
3347 case -NFS4ERR_OPENMODE:
3350 nfs4_state_mark_reclaim_nograce(clp, state);
3351 case -NFS4ERR_STALE_CLIENTID:
3352 case -NFS4ERR_STALE_STATEID:
3353 case -NFS4ERR_EXPIRED:
3354 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3355 nfs4_schedule_state_recovery(clp);
3356 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3357 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3358 task->tk_status = 0;
3360 #if defined(CONFIG_NFS_V4_1)
3361 case -NFS4ERR_BADSESSION:
3362 case -NFS4ERR_BADSLOT:
3363 case -NFS4ERR_BAD_HIGH_SLOT:
3364 case -NFS4ERR_DEADSESSION:
3365 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3366 case -NFS4ERR_SEQ_FALSE_RETRY:
3367 case -NFS4ERR_SEQ_MISORDERED:
3368 dprintk("%s ERROR %d, Reset session\n", __func__,
3370 nfs4_schedule_state_recovery(clp);
3371 task->tk_status = 0;
3373 #endif /* CONFIG_NFS_V4_1 */
3374 case -NFS4ERR_DELAY:
3376 nfs_inc_server_stats(server, NFSIOS_DELAY);
3377 case -NFS4ERR_GRACE:
3378 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3379 task->tk_status = 0;
3381 case -NFS4ERR_OLD_STATEID:
3382 task->tk_status = 0;
3385 task->tk_status = nfs4_map_errors(task->tk_status);
3390 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3392 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3395 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
3397 nfs4_verifier sc_verifier;
3398 struct nfs4_setclientid setclientid = {
3399 .sc_verifier = &sc_verifier,
3402 struct rpc_message msg = {
3403 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3404 .rpc_argp = &setclientid,
3412 p = (__be32*)sc_verifier.data;
3413 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3414 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3417 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3418 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3420 rpc_peeraddr2str(clp->cl_rpcclient,
3422 rpc_peeraddr2str(clp->cl_rpcclient,
3424 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3425 clp->cl_id_uniquifier);
3426 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3427 sizeof(setclientid.sc_netid),
3428 rpc_peeraddr2str(clp->cl_rpcclient,
3429 RPC_DISPLAY_NETID));
3430 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3431 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3432 clp->cl_ipaddr, port >> 8, port & 255);
3434 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3435 if (status != -NFS4ERR_CLID_INUSE)
3440 ssleep(clp->cl_lease_time + 1);
3442 if (++clp->cl_id_uniquifier == 0)
3448 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3450 struct nfs_fsinfo fsinfo;
3451 struct rpc_message msg = {
3452 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3454 .rpc_resp = &fsinfo,
3461 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3463 spin_lock(&clp->cl_lock);
3464 clp->cl_lease_time = fsinfo.lease_time * HZ;
3465 clp->cl_last_renewal = now;
3466 spin_unlock(&clp->cl_lock);
3471 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3476 err = _nfs4_proc_setclientid_confirm(clp, cred);
3480 case -NFS4ERR_RESOURCE:
3481 /* The IBM lawyers misread another document! */
3482 case -NFS4ERR_DELAY:
3483 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3489 struct nfs4_delegreturndata {
3490 struct nfs4_delegreturnargs args;
3491 struct nfs4_delegreturnres res;
3493 nfs4_stateid stateid;
3494 unsigned long timestamp;
3495 struct nfs_fattr fattr;
3499 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3501 struct nfs4_delegreturndata *data = calldata;
3503 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3506 switch (task->tk_status) {
3507 case -NFS4ERR_STALE_STATEID:
3508 case -NFS4ERR_EXPIRED:
3510 renew_lease(data->res.server, data->timestamp);
3513 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3515 nfs_restart_rpc(task, data->res.server->nfs_client);
3519 data->rpc_status = task->tk_status;
3522 static void nfs4_delegreturn_release(void *calldata)
3527 #if defined(CONFIG_NFS_V4_1)
3528 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3530 struct nfs4_delegreturndata *d_data;
3532 d_data = (struct nfs4_delegreturndata *)data;
3534 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3535 &d_data->args.seq_args,
3536 &d_data->res.seq_res, 1, task))
3538 rpc_call_start(task);
3540 #endif /* CONFIG_NFS_V4_1 */
3542 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3543 #if defined(CONFIG_NFS_V4_1)
3544 .rpc_call_prepare = nfs4_delegreturn_prepare,
3545 #endif /* CONFIG_NFS_V4_1 */
3546 .rpc_call_done = nfs4_delegreturn_done,
3547 .rpc_release = nfs4_delegreturn_release,
3550 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3552 struct nfs4_delegreturndata *data;
3553 struct nfs_server *server = NFS_SERVER(inode);
3554 struct rpc_task *task;
3555 struct rpc_message msg = {
3556 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3559 struct rpc_task_setup task_setup_data = {
3560 .rpc_client = server->client,
3561 .rpc_message = &msg,
3562 .callback_ops = &nfs4_delegreturn_ops,
3563 .flags = RPC_TASK_ASYNC,
3567 data = kzalloc(sizeof(*data), GFP_KERNEL);
3570 data->args.fhandle = &data->fh;
3571 data->args.stateid = &data->stateid;
3572 data->args.bitmask = server->attr_bitmask;
3573 nfs_copy_fh(&data->fh, NFS_FH(inode));
3574 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3575 data->res.fattr = &data->fattr;
3576 data->res.server = server;
3577 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3578 nfs_fattr_init(data->res.fattr);
3579 data->timestamp = jiffies;
3580 data->rpc_status = 0;
3582 task_setup_data.callback_data = data;
3583 msg.rpc_argp = &data->args,
3584 msg.rpc_resp = &data->res,
3585 task = rpc_run_task(&task_setup_data);
3587 return PTR_ERR(task);
3590 status = nfs4_wait_for_completion_rpc_task(task);
3593 status = data->rpc_status;
3596 nfs_refresh_inode(inode, &data->fattr);
3602 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3604 struct nfs_server *server = NFS_SERVER(inode);
3605 struct nfs4_exception exception = { };
3608 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3610 case -NFS4ERR_STALE_STATEID:
3611 case -NFS4ERR_EXPIRED:
3615 err = nfs4_handle_exception(server, err, &exception);
3616 } while (exception.retry);
3620 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3621 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3624 * sleep, with exponential backoff, and retry the LOCK operation.
3626 static unsigned long
3627 nfs4_set_lock_task_retry(unsigned long timeout)
3629 schedule_timeout_killable(timeout);
3631 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3632 return NFS4_LOCK_MAXTIMEOUT;
3636 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3638 struct inode *inode = state->inode;
3639 struct nfs_server *server = NFS_SERVER(inode);
3640 struct nfs_client *clp = server->nfs_client;
3641 struct nfs_lockt_args arg = {
3642 .fh = NFS_FH(inode),
3645 struct nfs_lockt_res res = {
3648 struct rpc_message msg = {
3649 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3652 .rpc_cred = state->owner->so_cred,
3654 struct nfs4_lock_state *lsp;
3657 arg.lock_owner.clientid = clp->cl_clientid;
3658 status = nfs4_set_lock_state(state, request);
3661 lsp = request->fl_u.nfs4_fl.owner;
3662 arg.lock_owner.id = lsp->ls_id.id;
3663 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3666 request->fl_type = F_UNLCK;
3668 case -NFS4ERR_DENIED:
3671 request->fl_ops->fl_release_private(request);
3676 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3678 struct nfs4_exception exception = { };
3682 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3683 _nfs4_proc_getlk(state, cmd, request),
3685 } while (exception.retry);
3689 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3692 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3694 res = posix_lock_file_wait(file, fl);
3697 res = flock_lock_file_wait(file, fl);
3705 struct nfs4_unlockdata {
3706 struct nfs_locku_args arg;
3707 struct nfs_locku_res res;
3708 struct nfs4_lock_state *lsp;
3709 struct nfs_open_context *ctx;
3710 struct file_lock fl;
3711 const struct nfs_server *server;
3712 unsigned long timestamp;
3715 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3716 struct nfs_open_context *ctx,
3717 struct nfs4_lock_state *lsp,
3718 struct nfs_seqid *seqid)
3720 struct nfs4_unlockdata *p;
3721 struct inode *inode = lsp->ls_state->inode;
3723 p = kzalloc(sizeof(*p), GFP_KERNEL);
3726 p->arg.fh = NFS_FH(inode);
3728 p->arg.seqid = seqid;
3729 p->res.seqid = seqid;
3730 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3731 p->arg.stateid = &lsp->ls_stateid;
3733 atomic_inc(&lsp->ls_count);
3734 /* Ensure we don't close file until we're done freeing locks! */
3735 p->ctx = get_nfs_open_context(ctx);
3736 memcpy(&p->fl, fl, sizeof(p->fl));
3737 p->server = NFS_SERVER(inode);
3741 static void nfs4_locku_release_calldata(void *data)
3743 struct nfs4_unlockdata *calldata = data;
3744 nfs_free_seqid(calldata->arg.seqid);
3745 nfs4_put_lock_state(calldata->lsp);
3746 put_nfs_open_context(calldata->ctx);
3750 static void nfs4_locku_done(struct rpc_task *task, void *data)
3752 struct nfs4_unlockdata *calldata = data;
3754 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3756 if (RPC_ASSASSINATED(task))
3758 switch (task->tk_status) {
3760 memcpy(calldata->lsp->ls_stateid.data,
3761 calldata->res.stateid.data,
3762 sizeof(calldata->lsp->ls_stateid.data));
3763 renew_lease(calldata->server, calldata->timestamp);
3765 case -NFS4ERR_BAD_STATEID:
3766 case -NFS4ERR_OLD_STATEID:
3767 case -NFS4ERR_STALE_STATEID:
3768 case -NFS4ERR_EXPIRED:
3771 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3772 nfs_restart_rpc(task,
3773 calldata->server->nfs_client);
3777 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3779 struct nfs4_unlockdata *calldata = data;
3781 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3783 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3784 /* Note: exit _without_ running nfs4_locku_done */
3785 task->tk_action = NULL;
3788 calldata->timestamp = jiffies;
3789 if (nfs4_setup_sequence(calldata->server->nfs_client,
3790 &calldata->arg.seq_args,
3791 &calldata->res.seq_res, 1, task))
3793 rpc_call_start(task);
3796 static const struct rpc_call_ops nfs4_locku_ops = {
3797 .rpc_call_prepare = nfs4_locku_prepare,
3798 .rpc_call_done = nfs4_locku_done,
3799 .rpc_release = nfs4_locku_release_calldata,
3802 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3803 struct nfs_open_context *ctx,
3804 struct nfs4_lock_state *lsp,
3805 struct nfs_seqid *seqid)
3807 struct nfs4_unlockdata *data;
3808 struct rpc_message msg = {
3809 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3810 .rpc_cred = ctx->cred,
3812 struct rpc_task_setup task_setup_data = {
3813 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3814 .rpc_message = &msg,
3815 .callback_ops = &nfs4_locku_ops,
3816 .workqueue = nfsiod_workqueue,
3817 .flags = RPC_TASK_ASYNC,
3820 /* Ensure this is an unlock - when canceling a lock, the
3821 * canceled lock is passed in, and it won't be an unlock.
3823 fl->fl_type = F_UNLCK;
3825 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3827 nfs_free_seqid(seqid);
3828 return ERR_PTR(-ENOMEM);
3831 msg.rpc_argp = &data->arg,
3832 msg.rpc_resp = &data->res,
3833 task_setup_data.callback_data = data;
3834 return rpc_run_task(&task_setup_data);
3837 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3839 struct nfs_inode *nfsi = NFS_I(state->inode);
3840 struct nfs_seqid *seqid;
3841 struct nfs4_lock_state *lsp;
3842 struct rpc_task *task;
3844 unsigned char fl_flags = request->fl_flags;
3846 status = nfs4_set_lock_state(state, request);
3847 /* Unlock _before_ we do the RPC call */
3848 request->fl_flags |= FL_EXISTS;
3849 down_read(&nfsi->rwsem);
3850 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3851 up_read(&nfsi->rwsem);
3854 up_read(&nfsi->rwsem);
3857 /* Is this a delegated lock? */
3858 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3860 lsp = request->fl_u.nfs4_fl.owner;
3861 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3865 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3866 status = PTR_ERR(task);
3869 status = nfs4_wait_for_completion_rpc_task(task);
3872 request->fl_flags = fl_flags;
3876 struct nfs4_lockdata {
3877 struct nfs_lock_args arg;
3878 struct nfs_lock_res res;
3879 struct nfs4_lock_state *lsp;
3880 struct nfs_open_context *ctx;
3881 struct file_lock fl;
3882 unsigned long timestamp;
3885 struct nfs_server *server;
3888 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3889 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3891 struct nfs4_lockdata *p;
3892 struct inode *inode = lsp->ls_state->inode;
3893 struct nfs_server *server = NFS_SERVER(inode);
3895 p = kzalloc(sizeof(*p), GFP_KERNEL);
3899 p->arg.fh = NFS_FH(inode);
3901 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3902 if (p->arg.open_seqid == NULL)
3904 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3905 if (p->arg.lock_seqid == NULL)
3906 goto out_free_seqid;
3907 p->arg.lock_stateid = &lsp->ls_stateid;
3908 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3909 p->arg.lock_owner.id = lsp->ls_id.id;
3910 p->res.lock_seqid = p->arg.lock_seqid;
3911 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3914 atomic_inc(&lsp->ls_count);
3915 p->ctx = get_nfs_open_context(ctx);
3916 memcpy(&p->fl, fl, sizeof(p->fl));
3919 nfs_free_seqid(p->arg.open_seqid);
3925 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3927 struct nfs4_lockdata *data = calldata;
3928 struct nfs4_state *state = data->lsp->ls_state;
3930 dprintk("%s: begin!\n", __func__);
3931 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3933 /* Do we need to do an open_to_lock_owner? */
3934 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3935 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3937 data->arg.open_stateid = &state->stateid;
3938 data->arg.new_lock_owner = 1;
3939 data->res.open_seqid = data->arg.open_seqid;
3941 data->arg.new_lock_owner = 0;
3942 data->timestamp = jiffies;
3943 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3944 &data->res.seq_res, 1, task))
3946 rpc_call_start(task);
3947 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3950 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3952 struct nfs4_lockdata *data = calldata;
3954 dprintk("%s: begin!\n", __func__);
3956 nfs4_sequence_done(data->server, &data->res.seq_res,
3959 data->rpc_status = task->tk_status;
3960 if (RPC_ASSASSINATED(task))
3962 if (data->arg.new_lock_owner != 0) {
3963 if (data->rpc_status == 0)
3964 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3968 if (data->rpc_status == 0) {
3969 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3970 sizeof(data->lsp->ls_stateid.data));
3971 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3972 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3975 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3978 static void nfs4_lock_release(void *calldata)
3980 struct nfs4_lockdata *data = calldata;
3982 dprintk("%s: begin!\n", __func__);
3983 nfs_free_seqid(data->arg.open_seqid);
3984 if (data->cancelled != 0) {
3985 struct rpc_task *task;
3986 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3987 data->arg.lock_seqid);
3990 dprintk("%s: cancelling lock!\n", __func__);
3992 nfs_free_seqid(data->arg.lock_seqid);
3993 nfs4_put_lock_state(data->lsp);
3994 put_nfs_open_context(data->ctx);
3996 dprintk("%s: done!\n", __func__);
3999 static const struct rpc_call_ops nfs4_lock_ops = {
4000 .rpc_call_prepare = nfs4_lock_prepare,
4001 .rpc_call_done = nfs4_lock_done,
4002 .rpc_release = nfs4_lock_release,
4005 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
4007 struct nfs4_lockdata *data;
4008 struct rpc_task *task;
4009 struct rpc_message msg = {
4010 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4011 .rpc_cred = state->owner->so_cred,
4013 struct rpc_task_setup task_setup_data = {
4014 .rpc_client = NFS_CLIENT(state->inode),
4015 .rpc_message = &msg,
4016 .callback_ops = &nfs4_lock_ops,
4017 .workqueue = nfsiod_workqueue,
4018 .flags = RPC_TASK_ASYNC,
4022 dprintk("%s: begin!\n", __func__);
4023 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4024 fl->fl_u.nfs4_fl.owner);
4028 data->arg.block = 1;
4030 data->arg.reclaim = 1;
4031 msg.rpc_argp = &data->arg,
4032 msg.rpc_resp = &data->res,
4033 task_setup_data.callback_data = data;
4034 task = rpc_run_task(&task_setup_data);
4036 return PTR_ERR(task);
4037 ret = nfs4_wait_for_completion_rpc_task(task);
4039 ret = data->rpc_status;
4041 data->cancelled = 1;
4043 dprintk("%s: done, ret = %d!\n", __func__, ret);
4047 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4049 struct nfs_server *server = NFS_SERVER(state->inode);
4050 struct nfs4_exception exception = { };
4054 /* Cache the lock if possible... */
4055 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4057 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4058 if (err != -NFS4ERR_DELAY)
4060 nfs4_handle_exception(server, err, &exception);
4061 } while (exception.retry);
4065 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4067 struct nfs_server *server = NFS_SERVER(state->inode);
4068 struct nfs4_exception exception = { };
4071 err = nfs4_set_lock_state(state, request);
4075 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4077 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4081 case -NFS4ERR_GRACE:
4082 case -NFS4ERR_DELAY:
4083 nfs4_handle_exception(server, err, &exception);
4086 } while (exception.retry);
4091 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4093 struct nfs_inode *nfsi = NFS_I(state->inode);
4094 unsigned char fl_flags = request->fl_flags;
4097 /* Is this a delegated open? */
4098 status = nfs4_set_lock_state(state, request);
4101 request->fl_flags |= FL_ACCESS;
4102 status = do_vfs_lock(request->fl_file, request);
4105 down_read(&nfsi->rwsem);
4106 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4107 /* Yes: cache locks! */
4108 /* ...but avoid races with delegation recall... */
4109 request->fl_flags = fl_flags & ~FL_SLEEP;
4110 status = do_vfs_lock(request->fl_file, request);
4113 status = _nfs4_do_setlk(state, cmd, request, 0);
4116 /* Note: we always want to sleep here! */
4117 request->fl_flags = fl_flags | FL_SLEEP;
4118 if (do_vfs_lock(request->fl_file, request) < 0)
4119 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4121 up_read(&nfsi->rwsem);
4123 request->fl_flags = fl_flags;
4127 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4129 struct nfs4_exception exception = { };
4133 err = _nfs4_proc_setlk(state, cmd, request);
4134 if (err == -NFS4ERR_DENIED)
4136 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4138 } while (exception.retry);
4143 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4145 struct nfs_open_context *ctx;
4146 struct nfs4_state *state;
4147 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4150 /* verify open state */
4151 ctx = nfs_file_open_context(filp);
4154 if (request->fl_start < 0 || request->fl_end < 0)
4157 if (IS_GETLK(cmd)) {
4159 return nfs4_proc_getlk(state, F_GETLK, request);
4163 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4166 if (request->fl_type == F_UNLCK) {
4168 return nfs4_proc_unlck(state, cmd, request);
4175 status = nfs4_proc_setlk(state, cmd, request);
4176 if ((status != -EAGAIN) || IS_SETLK(cmd))
4178 timeout = nfs4_set_lock_task_retry(timeout);
4179 status = -ERESTARTSYS;
4182 } while(status < 0);
4186 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4188 struct nfs_server *server = NFS_SERVER(state->inode);
4189 struct nfs4_exception exception = { };
4192 err = nfs4_set_lock_state(state, fl);
4196 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
4199 printk(KERN_ERR "%s: unhandled error %d.\n",
4204 case -NFS4ERR_EXPIRED:
4205 case -NFS4ERR_STALE_CLIENTID:
4206 case -NFS4ERR_STALE_STATEID:
4207 case -NFS4ERR_BADSESSION:
4208 case -NFS4ERR_BADSLOT:
4209 case -NFS4ERR_BAD_HIGH_SLOT:
4210 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4211 case -NFS4ERR_DEADSESSION:
4212 nfs4_schedule_state_recovery(server->nfs_client);
4216 * The show must go on: exit, but mark the
4217 * stateid as needing recovery.
4219 case -NFS4ERR_ADMIN_REVOKED:
4220 case -NFS4ERR_BAD_STATEID:
4221 case -NFS4ERR_OPENMODE:
4222 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4226 case -NFS4ERR_DENIED:
4227 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4230 case -NFS4ERR_DELAY:
4233 err = nfs4_handle_exception(server, err, &exception);
4234 } while (exception.retry);
4239 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4241 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4242 size_t buflen, int flags)
4244 struct inode *inode = dentry->d_inode;
4246 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4249 return nfs4_proc_set_acl(inode, buf, buflen);
4252 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4253 * and that's what we'll do for e.g. user attributes that haven't been set.
4254 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4255 * attributes in kernel-managed attribute namespaces. */
4256 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4259 struct inode *inode = dentry->d_inode;
4261 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4264 return nfs4_proc_get_acl(inode, buf, buflen);
4267 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4269 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
4271 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4273 if (buf && buflen < len)
4276 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4280 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4282 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4283 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4284 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4287 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4288 NFS_ATTR_FATTR_NLINK;
4289 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4293 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4294 struct nfs4_fs_locations *fs_locations, struct page *page)
4296 struct nfs_server *server = NFS_SERVER(dir);
4298 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4299 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4301 struct nfs4_fs_locations_arg args = {
4302 .dir_fh = NFS_FH(dir),
4307 struct nfs4_fs_locations_res res = {
4308 .fs_locations = fs_locations,
4310 struct rpc_message msg = {
4311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4317 dprintk("%s: start\n", __func__);
4318 nfs_fattr_init(&fs_locations->fattr);
4319 fs_locations->server = server;
4320 fs_locations->nlocations = 0;
4321 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4322 nfs_fixup_referral_attributes(&fs_locations->fattr);
4323 dprintk("%s: returned status = %d\n", __func__, status);
4327 #ifdef CONFIG_NFS_V4_1
4329 * nfs4_proc_exchange_id()
4331 * Since the clientid has expired, all compounds using sessions
4332 * associated with the stale clientid will be returning
4333 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4334 * be in some phase of session reset.
4336 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4338 nfs4_verifier verifier;
4339 struct nfs41_exchange_id_args args = {
4341 .flags = clp->cl_exchange_flags,
4343 struct nfs41_exchange_id_res res = {
4347 struct rpc_message msg = {
4348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4355 dprintk("--> %s\n", __func__);
4356 BUG_ON(clp == NULL);
4358 /* Remove server-only flags */
4359 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4361 p = (u32 *)verifier.data;
4362 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4363 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4364 args.verifier = &verifier;
4367 args.id_len = scnprintf(args.id, sizeof(args.id),
4370 rpc_peeraddr2str(clp->cl_rpcclient,
4372 clp->cl_id_uniquifier);
4374 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4376 if (status != NFS4ERR_CLID_INUSE)
4382 if (++clp->cl_id_uniquifier == 0)
4386 dprintk("<-- %s status= %d\n", __func__, status);
4390 struct nfs4_get_lease_time_data {
4391 struct nfs4_get_lease_time_args *args;
4392 struct nfs4_get_lease_time_res *res;
4393 struct nfs_client *clp;
4396 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4400 struct nfs4_get_lease_time_data *data =
4401 (struct nfs4_get_lease_time_data *)calldata;
4403 dprintk("--> %s\n", __func__);
4404 /* just setup sequence, do not trigger session recovery
4405 since we're invoked within one */
4406 ret = nfs41_setup_sequence(data->clp->cl_session,
4407 &data->args->la_seq_args,
4408 &data->res->lr_seq_res, 0, task);
4410 BUG_ON(ret == -EAGAIN);
4411 rpc_call_start(task);
4412 dprintk("<-- %s\n", __func__);
4416 * Called from nfs4_state_manager thread for session setup, so don't recover
4417 * from sequence operation or clientid errors.
4419 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4421 struct nfs4_get_lease_time_data *data =
4422 (struct nfs4_get_lease_time_data *)calldata;
4424 dprintk("--> %s\n", __func__);
4425 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4426 switch (task->tk_status) {
4427 case -NFS4ERR_DELAY:
4428 case -NFS4ERR_GRACE:
4429 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4430 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4431 task->tk_status = 0;
4432 nfs_restart_rpc(task, data->clp);
4435 dprintk("<-- %s\n", __func__);
4438 struct rpc_call_ops nfs4_get_lease_time_ops = {
4439 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4440 .rpc_call_done = nfs4_get_lease_time_done,
4443 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4445 struct rpc_task *task;
4446 struct nfs4_get_lease_time_args args;
4447 struct nfs4_get_lease_time_res res = {
4448 .lr_fsinfo = fsinfo,
4450 struct nfs4_get_lease_time_data data = {
4455 struct rpc_message msg = {
4456 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4460 struct rpc_task_setup task_setup = {
4461 .rpc_client = clp->cl_rpcclient,
4462 .rpc_message = &msg,
4463 .callback_ops = &nfs4_get_lease_time_ops,
4464 .callback_data = &data
4468 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4469 dprintk("--> %s\n", __func__);
4470 task = rpc_run_task(&task_setup);
4473 status = PTR_ERR(task);
4475 status = task->tk_status;
4478 dprintk("<-- %s return %d\n", __func__, status);
4484 * Reset a slot table
4486 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4487 int old_max_slots, int ivalue)
4492 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
4495 * Until we have dynamic slot table adjustment, insist
4496 * upon the same slot table size
4498 if (max_slots != old_max_slots) {
4499 dprintk("%s reset slot table does't match old\n",
4501 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4504 spin_lock(&tbl->slot_tbl_lock);
4505 for (i = 0; i < max_slots; ++i)
4506 tbl->slots[i].seq_nr = ivalue;
4507 spin_unlock(&tbl->slot_tbl_lock);
4508 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4509 tbl, tbl->slots, tbl->max_slots);
4511 dprintk("<-- %s: return %d\n", __func__, ret);
4516 * Reset the forechannel and backchannel slot tables
4518 static int nfs4_reset_slot_tables(struct nfs4_session *session)
4522 status = nfs4_reset_slot_table(&session->fc_slot_table,
4523 session->fc_attrs.max_reqs,
4524 session->fc_slot_table.max_slots,
4529 status = nfs4_reset_slot_table(&session->bc_slot_table,
4530 session->bc_attrs.max_reqs,
4531 session->bc_slot_table.max_slots,
4536 /* Destroy the slot table */
4537 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4539 if (session->fc_slot_table.slots != NULL) {
4540 kfree(session->fc_slot_table.slots);
4541 session->fc_slot_table.slots = NULL;
4543 if (session->bc_slot_table.slots != NULL) {
4544 kfree(session->bc_slot_table.slots);
4545 session->bc_slot_table.slots = NULL;
4551 * Initialize slot table
4553 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4554 int max_slots, int ivalue)
4556 struct nfs4_slot *slot;
4559 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4561 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4563 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4568 spin_lock(&tbl->slot_tbl_lock);
4569 tbl->max_slots = max_slots;
4571 tbl->highest_used_slotid = -1; /* no slot is currently used */
4572 spin_unlock(&tbl->slot_tbl_lock);
4573 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4574 tbl, tbl->slots, tbl->max_slots);
4576 dprintk("<-- %s: return %d\n", __func__, ret);
4581 * Initialize the forechannel and backchannel tables
4583 static int nfs4_init_slot_tables(struct nfs4_session *session)
4585 struct nfs4_slot_table *tbl;
4588 tbl = &session->fc_slot_table;
4589 if (tbl->slots == NULL) {
4590 status = nfs4_init_slot_table(tbl,
4591 session->fc_attrs.max_reqs, 1);
4596 tbl = &session->bc_slot_table;
4597 if (tbl->slots == NULL) {
4598 status = nfs4_init_slot_table(tbl,
4599 session->bc_attrs.max_reqs, 0);
4601 nfs4_destroy_slot_tables(session);
4607 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4609 struct nfs4_session *session;
4610 struct nfs4_slot_table *tbl;
4612 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4617 * The create session reply races with the server back
4618 * channel probe. Mark the client NFS_CS_SESSION_INITING
4619 * so that the client back channel can find the
4622 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4623 init_completion(&session->complete);
4625 tbl = &session->fc_slot_table;
4626 tbl->highest_used_slotid = -1;
4627 spin_lock_init(&tbl->slot_tbl_lock);
4628 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4630 tbl = &session->bc_slot_table;
4631 tbl->highest_used_slotid = -1;
4632 spin_lock_init(&tbl->slot_tbl_lock);
4633 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4639 void nfs4_destroy_session(struct nfs4_session *session)
4641 nfs4_proc_destroy_session(session);
4642 dprintk("%s Destroy backchannel for xprt %p\n",
4643 __func__, session->clp->cl_rpcclient->cl_xprt);
4644 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4645 NFS41_BC_MIN_CALLBACKS);
4646 nfs4_destroy_slot_tables(session);
4651 * Initialize the values to be used by the client in CREATE_SESSION
4652 * If nfs4_init_session set the fore channel request and response sizes,
4655 * Set the back channel max_resp_sz_cached to zero to force the client to
4656 * always set csa_cachethis to FALSE because the current implementation
4657 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4659 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4661 struct nfs4_session *session = args->client->cl_session;
4662 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4663 mxresp_sz = session->fc_attrs.max_resp_sz;
4666 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4668 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4669 /* Fore channel attributes */
4670 args->fc_attrs.headerpadsz = 0;
4671 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4672 args->fc_attrs.max_resp_sz = mxresp_sz;
4673 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4674 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4675 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4677 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4678 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4680 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4681 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4682 args->fc_attrs.max_reqs);
4684 /* Back channel attributes */
4685 args->bc_attrs.headerpadsz = 0;
4686 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4687 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4688 args->bc_attrs.max_resp_sz_cached = 0;
4689 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4690 args->bc_attrs.max_reqs = 1;
4692 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4693 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4695 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4696 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4697 args->bc_attrs.max_reqs);
4700 static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4704 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4705 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4709 #define _verify_fore_channel_attr(_name_) \
4710 _verify_channel_attr("fore", #_name_, \
4711 args->fc_attrs._name_, \
4712 session->fc_attrs._name_)
4714 #define _verify_back_channel_attr(_name_) \
4715 _verify_channel_attr("back", #_name_, \
4716 args->bc_attrs._name_, \
4717 session->bc_attrs._name_)
4720 * The server is not allowed to increase the fore channel header pad size,
4721 * maximum response size, or maximum number of operations.
4723 * The back channel attributes are only negotiatied down: We send what the
4724 * (back channel) server insists upon.
4726 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4727 struct nfs4_session *session)
4731 ret |= _verify_fore_channel_attr(headerpadsz);
4732 ret |= _verify_fore_channel_attr(max_resp_sz);
4733 ret |= _verify_fore_channel_attr(max_ops);
4735 ret |= _verify_back_channel_attr(headerpadsz);
4736 ret |= _verify_back_channel_attr(max_rqst_sz);
4737 ret |= _verify_back_channel_attr(max_resp_sz);
4738 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4739 ret |= _verify_back_channel_attr(max_ops);
4740 ret |= _verify_back_channel_attr(max_reqs);
4745 static int _nfs4_proc_create_session(struct nfs_client *clp)
4747 struct nfs4_session *session = clp->cl_session;
4748 struct nfs41_create_session_args args = {
4750 .cb_program = NFS4_CALLBACK,
4752 struct nfs41_create_session_res res = {
4755 struct rpc_message msg = {
4756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4762 nfs4_init_channel_attrs(&args);
4763 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
4765 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4768 /* Verify the session's negotiated channel_attrs values */
4769 status = nfs4_verify_channel_attrs(&args, session);
4771 /* Increment the clientid slot sequence id */
4779 * Issues a CREATE_SESSION operation to the server.
4780 * It is the responsibility of the caller to verify the session is
4781 * expired before calling this routine.
4783 int nfs4_proc_create_session(struct nfs_client *clp)
4787 struct nfs4_session *session = clp->cl_session;
4789 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4791 status = _nfs4_proc_create_session(clp);
4795 /* Init and reset the fore channel */
4796 status = nfs4_init_slot_tables(session);
4797 dprintk("slot table initialization returned %d\n", status);
4800 status = nfs4_reset_slot_tables(session);
4801 dprintk("slot table reset returned %d\n", status);
4805 ptr = (unsigned *)&session->sess_id.data[0];
4806 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4807 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4809 dprintk("<-- %s\n", __func__);
4814 * Issue the over-the-wire RPC DESTROY_SESSION.
4815 * The caller must serialize access to this routine.
4817 int nfs4_proc_destroy_session(struct nfs4_session *session)
4820 struct rpc_message msg;
4822 dprintk("--> nfs4_proc_destroy_session\n");
4824 /* session is still being setup */
4825 if (session->clp->cl_cons_state != NFS_CS_READY)
4828 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4829 msg.rpc_argp = session;
4830 msg.rpc_resp = NULL;
4831 msg.rpc_cred = NULL;
4832 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4836 "Got error %d from the server on DESTROY_SESSION. "
4837 "Session has been destroyed regardless...\n", status);
4839 dprintk("<-- nfs4_proc_destroy_session\n");
4843 int nfs4_init_session(struct nfs_server *server)
4845 struct nfs_client *clp = server->nfs_client;
4846 struct nfs4_session *session;
4849 if (!nfs4_has_session(clp))
4852 session = clp->cl_session;
4853 session->fc_attrs.max_rqst_sz = server->wsize + nfs41_maxwrite_overhead;
4854 session->fc_attrs.max_resp_sz = server->rsize + nfs41_maxread_overhead;
4856 ret = nfs4_recover_expired_lease(server);
4858 ret = nfs4_check_client_ready(clp);
4863 * Renew the cl_session lease.
4865 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4867 struct nfs4_sequence_args args;
4868 struct nfs4_sequence_res res;
4870 struct rpc_message msg = {
4871 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4877 args.sa_cache_this = 0;
4879 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4883 void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4885 struct nfs_client *clp = (struct nfs_client *)data;
4887 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4889 if (task->tk_status < 0) {
4890 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4892 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4894 nfs_restart_rpc(task, clp);
4898 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4900 kfree(task->tk_msg.rpc_argp);
4901 kfree(task->tk_msg.rpc_resp);
4903 dprintk("<-- %s\n", __func__);
4906 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4908 struct nfs_client *clp;
4909 struct nfs4_sequence_args *args;
4910 struct nfs4_sequence_res *res;
4912 clp = (struct nfs_client *)data;
4913 args = task->tk_msg.rpc_argp;
4914 res = task->tk_msg.rpc_resp;
4916 if (nfs4_setup_sequence(clp, args, res, 0, task))
4918 rpc_call_start(task);
4921 static const struct rpc_call_ops nfs41_sequence_ops = {
4922 .rpc_call_done = nfs41_sequence_call_done,
4923 .rpc_call_prepare = nfs41_sequence_prepare,
4926 static int nfs41_proc_async_sequence(struct nfs_client *clp,
4927 struct rpc_cred *cred)
4929 struct nfs4_sequence_args *args;
4930 struct nfs4_sequence_res *res;
4931 struct rpc_message msg = {
4932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4936 args = kzalloc(sizeof(*args), GFP_KERNEL);
4939 res = kzalloc(sizeof(*res), GFP_KERNEL);
4944 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4945 msg.rpc_argp = args;
4948 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4949 &nfs41_sequence_ops, (void *)clp);
4952 struct nfs4_reclaim_complete_data {
4953 struct nfs_client *clp;
4954 struct nfs41_reclaim_complete_args arg;
4955 struct nfs41_reclaim_complete_res res;
4958 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
4960 struct nfs4_reclaim_complete_data *calldata = data;
4962 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
4963 &calldata->res.seq_res, 0, task))
4966 rpc_call_start(task);
4969 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
4971 struct nfs4_reclaim_complete_data *calldata = data;
4972 struct nfs_client *clp = calldata->clp;
4973 struct nfs4_sequence_res *res = &calldata->res.seq_res;
4975 dprintk("--> %s\n", __func__);
4976 nfs41_sequence_done(clp, res, task->tk_status);
4977 switch (task->tk_status) {
4979 case -NFS4ERR_COMPLETE_ALREADY:
4981 case -NFS4ERR_BADSESSION:
4982 case -NFS4ERR_DEADSESSION:
4984 * Handle the session error, but do not retry the operation, as
4985 * we have no way of telling whether the clientid had to be
4986 * reset before we got our reply. If reset, a new wave of
4987 * reclaim operations will follow, containing their own reclaim
4988 * complete. We don't want our retry to get on the way of
4989 * recovery by incorrectly indicating to the server that we're
4990 * done reclaiming state since the process had to be restarted.
4992 _nfs4_async_handle_error(task, NULL, clp, NULL);
4995 if (_nfs4_async_handle_error(
4996 task, NULL, clp, NULL) == -EAGAIN) {
4997 rpc_restart_call_prepare(task);
5002 dprintk("<-- %s\n", __func__);
5005 static void nfs4_free_reclaim_complete_data(void *data)
5007 struct nfs4_reclaim_complete_data *calldata = data;
5012 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5013 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5014 .rpc_call_done = nfs4_reclaim_complete_done,
5015 .rpc_release = nfs4_free_reclaim_complete_data,
5019 * Issue a global reclaim complete.
5021 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5023 struct nfs4_reclaim_complete_data *calldata;
5024 struct rpc_task *task;
5025 struct rpc_message msg = {
5026 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5028 struct rpc_task_setup task_setup_data = {
5029 .rpc_client = clp->cl_rpcclient,
5030 .rpc_message = &msg,
5031 .callback_ops = &nfs4_reclaim_complete_call_ops,
5032 .flags = RPC_TASK_ASYNC,
5034 int status = -ENOMEM;
5036 dprintk("--> %s\n", __func__);
5037 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
5038 if (calldata == NULL)
5040 calldata->clp = clp;
5041 calldata->arg.one_fs = 0;
5042 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5044 msg.rpc_argp = &calldata->arg;
5045 msg.rpc_resp = &calldata->res;
5046 task_setup_data.callback_data = calldata;
5047 task = rpc_run_task(&task_setup_data);
5049 status = PTR_ERR(task);
5052 dprintk("<-- %s status=%d\n", __func__, status);
5055 #endif /* CONFIG_NFS_V4_1 */
5057 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
5058 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5059 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5060 .recover_open = nfs4_open_reclaim,
5061 .recover_lock = nfs4_lock_reclaim,
5062 .establish_clid = nfs4_init_clientid,
5063 .get_clid_cred = nfs4_get_setclientid_cred,
5066 #if defined(CONFIG_NFS_V4_1)
5067 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5068 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5069 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5070 .recover_open = nfs4_open_reclaim,
5071 .recover_lock = nfs4_lock_reclaim,
5072 .establish_clid = nfs41_init_clientid,
5073 .get_clid_cred = nfs4_get_exchange_id_cred,
5074 .reclaim_complete = nfs41_proc_reclaim_complete,
5076 #endif /* CONFIG_NFS_V4_1 */
5078 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5079 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5080 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5081 .recover_open = nfs4_open_expired,
5082 .recover_lock = nfs4_lock_expired,
5083 .establish_clid = nfs4_init_clientid,
5084 .get_clid_cred = nfs4_get_setclientid_cred,
5087 #if defined(CONFIG_NFS_V4_1)
5088 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
5089 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5090 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5091 .recover_open = nfs4_open_expired,
5092 .recover_lock = nfs4_lock_expired,
5093 .establish_clid = nfs41_init_clientid,
5094 .get_clid_cred = nfs4_get_exchange_id_cred,
5096 #endif /* CONFIG_NFS_V4_1 */
5098 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5099 .sched_state_renewal = nfs4_proc_async_renew,
5100 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
5101 .renew_lease = nfs4_proc_renew,
5104 #if defined(CONFIG_NFS_V4_1)
5105 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5106 .sched_state_renewal = nfs41_proc_async_sequence,
5107 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
5108 .renew_lease = nfs4_proc_sequence,
5113 * Per minor version reboot and network partition recovery ops
5116 struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5117 &nfs40_reboot_recovery_ops,
5118 #if defined(CONFIG_NFS_V4_1)
5119 &nfs41_reboot_recovery_ops,
5123 struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5124 &nfs40_nograce_recovery_ops,
5125 #if defined(CONFIG_NFS_V4_1)
5126 &nfs41_nograce_recovery_ops,
5130 struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5131 &nfs40_state_renewal_ops,
5132 #if defined(CONFIG_NFS_V4_1)
5133 &nfs41_state_renewal_ops,
5137 static const struct inode_operations nfs4_file_inode_operations = {
5138 .permission = nfs_permission,
5139 .getattr = nfs_getattr,
5140 .setattr = nfs_setattr,
5141 .getxattr = nfs4_getxattr,
5142 .setxattr = nfs4_setxattr,
5143 .listxattr = nfs4_listxattr,
5146 const struct nfs_rpc_ops nfs_v4_clientops = {
5147 .version = 4, /* protocol version */
5148 .dentry_ops = &nfs4_dentry_operations,
5149 .dir_inode_ops = &nfs4_dir_inode_operations,
5150 .file_inode_ops = &nfs4_file_inode_operations,
5151 .getroot = nfs4_proc_get_root,
5152 .getattr = nfs4_proc_getattr,
5153 .setattr = nfs4_proc_setattr,
5154 .lookupfh = nfs4_proc_lookupfh,
5155 .lookup = nfs4_proc_lookup,
5156 .access = nfs4_proc_access,
5157 .readlink = nfs4_proc_readlink,
5158 .create = nfs4_proc_create,
5159 .remove = nfs4_proc_remove,
5160 .unlink_setup = nfs4_proc_unlink_setup,
5161 .unlink_done = nfs4_proc_unlink_done,
5162 .rename = nfs4_proc_rename,
5163 .link = nfs4_proc_link,
5164 .symlink = nfs4_proc_symlink,
5165 .mkdir = nfs4_proc_mkdir,
5166 .rmdir = nfs4_proc_remove,
5167 .readdir = nfs4_proc_readdir,
5168 .mknod = nfs4_proc_mknod,
5169 .statfs = nfs4_proc_statfs,
5170 .fsinfo = nfs4_proc_fsinfo,
5171 .pathconf = nfs4_proc_pathconf,
5172 .set_capabilities = nfs4_server_capabilities,
5173 .decode_dirent = nfs4_decode_dirent,
5174 .read_setup = nfs4_proc_read_setup,
5175 .read_done = nfs4_read_done,
5176 .write_setup = nfs4_proc_write_setup,
5177 .write_done = nfs4_write_done,
5178 .commit_setup = nfs4_proc_commit_setup,
5179 .commit_done = nfs4_commit_done,
5180 .lock = nfs4_proc_lock,
5181 .clear_acl_cache = nfs4_zap_acl_attr,
5182 .close_context = nfs4_close_context,