4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/sunrpc/clnt.h>
43 #include <linux/nfs.h>
44 #include <linux/nfs4.h>
45 #include <linux/nfs_fs.h>
46 #include <linux/nfs_page.h>
47 #include <linux/namei.h>
48 #include <linux/mount.h>
49 #include <linux/module.h>
50 #include <linux/sunrpc/bc_xprt.h>
53 #include "delegation.h"
58 #define NFSDBG_FACILITY NFSDBG_PROC
60 #define NFS4_POLL_RETRY_MIN (HZ/10)
61 #define NFS4_POLL_RETRY_MAX (15*HZ)
63 #define NFS4_MAX_LOOP_ON_RECOVER (10)
66 static int _nfs4_proc_open(struct nfs4_opendata *data);
67 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
68 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
69 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
70 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
71 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
73 /* Prevent leaks of NFSv4 errors into userland */
74 static int nfs4_map_errors(int err)
79 case -NFS4ERR_RESOURCE:
82 dprintk("%s could not handle NFSv4 error %d\n",
90 * This is our standard bitmap for GETATTR requests.
92 const u32 nfs4_fattr_bitmap[2] = {
97 | FATTR4_WORD0_FILEID,
99 | FATTR4_WORD1_NUMLINKS
101 | FATTR4_WORD1_OWNER_GROUP
102 | FATTR4_WORD1_RAWDEV
103 | FATTR4_WORD1_SPACE_USED
104 | FATTR4_WORD1_TIME_ACCESS
105 | FATTR4_WORD1_TIME_METADATA
106 | FATTR4_WORD1_TIME_MODIFY
109 const u32 nfs4_statfs_bitmap[2] = {
110 FATTR4_WORD0_FILES_AVAIL
111 | FATTR4_WORD0_FILES_FREE
112 | FATTR4_WORD0_FILES_TOTAL,
113 FATTR4_WORD1_SPACE_AVAIL
114 | FATTR4_WORD1_SPACE_FREE
115 | FATTR4_WORD1_SPACE_TOTAL
118 const u32 nfs4_pathconf_bitmap[2] = {
120 | FATTR4_WORD0_MAXNAME,
124 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
125 | FATTR4_WORD0_MAXREAD
126 | FATTR4_WORD0_MAXWRITE
127 | FATTR4_WORD0_LEASE_TIME,
131 const u32 nfs4_fs_locations_bitmap[2] = {
133 | FATTR4_WORD0_CHANGE
136 | FATTR4_WORD0_FILEID
137 | FATTR4_WORD0_FS_LOCATIONS,
139 | FATTR4_WORD1_NUMLINKS
141 | FATTR4_WORD1_OWNER_GROUP
142 | FATTR4_WORD1_RAWDEV
143 | FATTR4_WORD1_SPACE_USED
144 | FATTR4_WORD1_TIME_ACCESS
145 | FATTR4_WORD1_TIME_METADATA
146 | FATTR4_WORD1_TIME_MODIFY
147 | FATTR4_WORD1_MOUNTED_ON_FILEID
150 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
151 struct nfs4_readdir_arg *readdir)
155 BUG_ON(readdir->count < 80);
157 readdir->cookie = cookie;
158 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
163 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
168 * NFSv4 servers do not return entries for '.' and '..'
169 * Therefore, we fake these entries here. We let '.'
170 * have cookie 0 and '..' have cookie 1. Note that
171 * when talking to the server, we always send cookie 0
174 start = p = kmap_atomic(*readdir->pages, KM_USER0);
177 *p++ = xdr_one; /* next */
178 *p++ = xdr_zero; /* cookie, first word */
179 *p++ = xdr_one; /* cookie, second word */
180 *p++ = xdr_one; /* entry len */
181 memcpy(p, ".\0\0\0", 4); /* entry */
183 *p++ = xdr_one; /* bitmap length */
184 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
185 *p++ = htonl(8); /* attribute buffer length */
186 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
189 *p++ = xdr_one; /* next */
190 *p++ = xdr_zero; /* cookie, first word */
191 *p++ = xdr_two; /* cookie, second word */
192 *p++ = xdr_two; /* entry len */
193 memcpy(p, "..\0\0", 4); /* entry */
195 *p++ = xdr_one; /* bitmap length */
196 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
197 *p++ = htonl(8); /* attribute buffer length */
198 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
200 readdir->pgbase = (char *)p - (char *)start;
201 readdir->count -= readdir->pgbase;
202 kunmap_atomic(start, KM_USER0);
205 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
211 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
212 nfs_wait_bit_killable, TASK_KILLABLE);
216 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
223 *timeout = NFS4_POLL_RETRY_MIN;
224 if (*timeout > NFS4_POLL_RETRY_MAX)
225 *timeout = NFS4_POLL_RETRY_MAX;
226 schedule_timeout_killable(*timeout);
227 if (fatal_signal_pending(current))
233 /* This is the error handling routine for processes that are allowed
236 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
238 struct nfs_client *clp = server->nfs_client;
239 struct nfs4_state *state = exception->state;
242 exception->retry = 0;
246 case -NFS4ERR_ADMIN_REVOKED:
247 case -NFS4ERR_BAD_STATEID:
248 case -NFS4ERR_OPENMODE:
251 nfs4_state_mark_reclaim_nograce(clp, state);
252 case -NFS4ERR_STALE_CLIENTID:
253 case -NFS4ERR_STALE_STATEID:
254 case -NFS4ERR_EXPIRED:
255 nfs4_schedule_state_recovery(clp);
256 ret = nfs4_wait_clnt_recover(clp);
258 exception->retry = 1;
259 #if !defined(CONFIG_NFS_V4_1)
261 #else /* !defined(CONFIG_NFS_V4_1) */
262 if (!nfs4_has_session(server->nfs_client))
265 case -NFS4ERR_BADSESSION:
266 case -NFS4ERR_BADSLOT:
267 case -NFS4ERR_BAD_HIGH_SLOT:
268 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
269 case -NFS4ERR_DEADSESSION:
270 case -NFS4ERR_SEQ_FALSE_RETRY:
271 case -NFS4ERR_SEQ_MISORDERED:
272 dprintk("%s ERROR: %d Reset session\n", __func__,
274 nfs4_schedule_state_recovery(clp);
275 exception->retry = 1;
277 #endif /* !defined(CONFIG_NFS_V4_1) */
278 case -NFS4ERR_FILE_OPEN:
279 if (exception->timeout > HZ) {
280 /* We have retried a decent amount, time to
288 ret = nfs4_delay(server->client, &exception->timeout);
291 case -NFS4ERR_OLD_STATEID:
292 exception->retry = 1;
294 /* We failed to handle the error */
295 return nfs4_map_errors(ret);
299 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
301 struct nfs_client *clp = server->nfs_client;
302 spin_lock(&clp->cl_lock);
303 if (time_before(clp->cl_last_renewal,timestamp))
304 clp->cl_last_renewal = timestamp;
305 spin_unlock(&clp->cl_lock);
308 #if defined(CONFIG_NFS_V4_1)
311 * nfs4_free_slot - free a slot and efficiently update slot table.
313 * freeing a slot is trivially done by clearing its respective bit
315 * If the freed slotid equals highest_used_slotid we want to update it
316 * so that the server would be able to size down the slot table if needed,
317 * otherwise we know that the highest_used_slotid is still in use.
318 * When updating highest_used_slotid there may be "holes" in the bitmap
319 * so we need to scan down from highest_used_slotid to 0 looking for the now
320 * highest slotid in use.
321 * If none found, highest_used_slotid is set to -1.
323 * Must be called while holding tbl->slot_tbl_lock
326 nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
328 int slotid = free_slotid;
330 /* clear used bit in bitmap */
331 __clear_bit(slotid, tbl->used_slots);
333 /* update highest_used_slotid when it is freed */
334 if (slotid == tbl->highest_used_slotid) {
335 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
336 if (slotid < tbl->max_slots)
337 tbl->highest_used_slotid = slotid;
339 tbl->highest_used_slotid = -1;
341 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
342 free_slotid, tbl->highest_used_slotid);
346 * Signal state manager thread if session is drained
348 static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
350 struct rpc_task *task;
352 if (!test_bit(NFS4CLNT_SESSION_DRAINING, &ses->clp->cl_state)) {
353 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
355 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
359 if (ses->fc_slot_table.highest_used_slotid != -1)
362 dprintk("%s COMPLETE: Session Drained\n", __func__);
363 complete(&ses->complete);
366 static void nfs41_sequence_free_slot(const struct nfs_client *clp,
367 struct nfs4_sequence_res *res)
369 struct nfs4_slot_table *tbl;
371 tbl = &clp->cl_session->fc_slot_table;
372 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
373 /* just wake up the next guy waiting since
374 * we may have not consumed a slot after all */
375 dprintk("%s: No slot\n", __func__);
379 spin_lock(&tbl->slot_tbl_lock);
380 nfs4_free_slot(tbl, res->sr_slotid);
381 nfs41_check_drain_session_complete(clp->cl_session);
382 spin_unlock(&tbl->slot_tbl_lock);
383 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
386 static void nfs41_sequence_done(struct nfs_client *clp,
387 struct nfs4_sequence_res *res,
390 unsigned long timestamp;
391 struct nfs4_slot_table *tbl;
392 struct nfs4_slot *slot;
395 * sr_status remains 1 if an RPC level error occurred. The server
396 * may or may not have processed the sequence operation..
397 * Proceed as if the server received and processed the sequence
400 if (res->sr_status == 1)
401 res->sr_status = NFS_OK;
403 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
404 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
407 /* Check the SEQUENCE operation status */
408 if (res->sr_status == 0) {
409 tbl = &clp->cl_session->fc_slot_table;
410 slot = tbl->slots + res->sr_slotid;
411 /* Update the slot's sequence and clientid lease timer */
413 timestamp = res->sr_renewal_time;
414 spin_lock(&clp->cl_lock);
415 if (time_before(clp->cl_last_renewal, timestamp))
416 clp->cl_last_renewal = timestamp;
417 spin_unlock(&clp->cl_lock);
418 /* Check sequence flags */
419 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
422 /* The session may be reset by one of the error handlers. */
423 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
424 nfs41_sequence_free_slot(clp, res);
428 * nfs4_find_slot - efficiently look for a free slot
430 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
431 * If found, we mark the slot as used, update the highest_used_slotid,
432 * and respectively set up the sequence operation args.
433 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
435 * Note: must be called with under the slot_tbl_lock.
438 nfs4_find_slot(struct nfs4_slot_table *tbl)
441 u8 ret_id = NFS4_MAX_SLOT_TABLE;
442 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
444 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
445 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
447 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
448 if (slotid >= tbl->max_slots)
450 __set_bit(slotid, tbl->used_slots);
451 if (slotid > tbl->highest_used_slotid)
452 tbl->highest_used_slotid = slotid;
455 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
456 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
460 static int nfs41_setup_sequence(struct nfs4_session *session,
461 struct nfs4_sequence_args *args,
462 struct nfs4_sequence_res *res,
464 struct rpc_task *task)
466 struct nfs4_slot *slot;
467 struct nfs4_slot_table *tbl;
470 dprintk("--> %s\n", __func__);
471 /* slot already allocated? */
472 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
475 memset(res, 0, sizeof(*res));
476 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
477 tbl = &session->fc_slot_table;
479 spin_lock(&tbl->slot_tbl_lock);
480 if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state) &&
481 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
483 * The state manager will wait until the slot table is empty.
484 * Schedule the reset thread
486 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
487 spin_unlock(&tbl->slot_tbl_lock);
488 dprintk("%s Schedule Session Reset\n", __func__);
492 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
493 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
494 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
495 spin_unlock(&tbl->slot_tbl_lock);
496 dprintk("%s enforce FIFO order\n", __func__);
500 slotid = nfs4_find_slot(tbl);
501 if (slotid == NFS4_MAX_SLOT_TABLE) {
502 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
503 spin_unlock(&tbl->slot_tbl_lock);
504 dprintk("<-- %s: no free slots\n", __func__);
507 spin_unlock(&tbl->slot_tbl_lock);
509 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
510 slot = tbl->slots + slotid;
511 args->sa_session = session;
512 args->sa_slotid = slotid;
513 args->sa_cache_this = cache_reply;
515 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
517 res->sr_session = session;
518 res->sr_slotid = slotid;
519 res->sr_renewal_time = jiffies;
521 * sr_status is only set in decode_sequence, and so will remain
522 * set to 1 if an rpc level failure occurs.
528 int nfs4_setup_sequence(struct nfs_client *clp,
529 struct nfs4_sequence_args *args,
530 struct nfs4_sequence_res *res,
532 struct rpc_task *task)
536 dprintk("--> %s clp %p session %p sr_slotid %d\n",
537 __func__, clp, clp->cl_session, res->sr_slotid);
539 if (!nfs4_has_session(clp))
541 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
543 if (ret && ret != -EAGAIN) {
544 /* terminate rpc task */
545 task->tk_status = ret;
546 task->tk_action = NULL;
549 dprintk("<-- %s status=%d\n", __func__, ret);
553 struct nfs41_call_sync_data {
554 struct nfs_client *clp;
555 struct nfs4_sequence_args *seq_args;
556 struct nfs4_sequence_res *seq_res;
560 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
562 struct nfs41_call_sync_data *data = calldata;
564 dprintk("--> %s data->clp->cl_session %p\n", __func__,
565 data->clp->cl_session);
566 if (nfs4_setup_sequence(data->clp, data->seq_args,
567 data->seq_res, data->cache_reply, task))
569 rpc_call_start(task);
572 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
574 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
575 nfs41_call_sync_prepare(task, calldata);
578 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
580 struct nfs41_call_sync_data *data = calldata;
582 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
585 struct rpc_call_ops nfs41_call_sync_ops = {
586 .rpc_call_prepare = nfs41_call_sync_prepare,
587 .rpc_call_done = nfs41_call_sync_done,
590 struct rpc_call_ops nfs41_call_priv_sync_ops = {
591 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
592 .rpc_call_done = nfs41_call_sync_done,
595 static int nfs4_call_sync_sequence(struct nfs_client *clp,
596 struct rpc_clnt *clnt,
597 struct rpc_message *msg,
598 struct nfs4_sequence_args *args,
599 struct nfs4_sequence_res *res,
604 struct rpc_task *task;
605 struct nfs41_call_sync_data data = {
609 .cache_reply = cache_reply,
611 struct rpc_task_setup task_setup = {
614 .callback_ops = &nfs41_call_sync_ops,
615 .callback_data = &data
618 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
620 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
621 task = rpc_run_task(&task_setup);
625 ret = task->tk_status;
631 int _nfs4_call_sync_session(struct nfs_server *server,
632 struct rpc_message *msg,
633 struct nfs4_sequence_args *args,
634 struct nfs4_sequence_res *res,
637 return nfs4_call_sync_sequence(server->nfs_client, server->client,
638 msg, args, res, cache_reply, 0);
641 #endif /* CONFIG_NFS_V4_1 */
643 int _nfs4_call_sync(struct nfs_server *server,
644 struct rpc_message *msg,
645 struct nfs4_sequence_args *args,
646 struct nfs4_sequence_res *res,
649 args->sa_session = res->sr_session = NULL;
650 return rpc_call_sync(server->client, msg, 0);
653 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
654 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
655 &(res)->seq_res, (cache_reply))
657 static void nfs4_sequence_done(const struct nfs_server *server,
658 struct nfs4_sequence_res *res, int rpc_status)
660 #ifdef CONFIG_NFS_V4_1
661 if (nfs4_has_session(server->nfs_client))
662 nfs41_sequence_done(server->nfs_client, res, rpc_status);
663 #endif /* CONFIG_NFS_V4_1 */
666 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
668 struct nfs_inode *nfsi = NFS_I(dir);
670 spin_lock(&dir->i_lock);
671 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
672 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
673 nfs_force_lookup_revalidate(dir);
674 nfsi->change_attr = cinfo->after;
675 spin_unlock(&dir->i_lock);
678 struct nfs4_opendata {
680 struct nfs_openargs o_arg;
681 struct nfs_openres o_res;
682 struct nfs_open_confirmargs c_arg;
683 struct nfs_open_confirmres c_res;
684 struct nfs_fattr f_attr;
685 struct nfs_fattr dir_attr;
688 struct nfs4_state_owner *owner;
689 struct nfs4_state *state;
691 unsigned long timestamp;
692 unsigned int rpc_done : 1;
698 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
700 p->o_res.f_attr = &p->f_attr;
701 p->o_res.dir_attr = &p->dir_attr;
702 p->o_res.seqid = p->o_arg.seqid;
703 p->c_res.seqid = p->c_arg.seqid;
704 p->o_res.server = p->o_arg.server;
705 nfs_fattr_init(&p->f_attr);
706 nfs_fattr_init(&p->dir_attr);
707 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
710 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
711 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
712 const struct iattr *attrs)
714 struct dentry *parent = dget_parent(path->dentry);
715 struct inode *dir = parent->d_inode;
716 struct nfs_server *server = NFS_SERVER(dir);
717 struct nfs4_opendata *p;
719 p = kzalloc(sizeof(*p), GFP_KERNEL);
722 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
723 if (p->o_arg.seqid == NULL)
725 p->path.mnt = mntget(path->mnt);
726 p->path.dentry = dget(path->dentry);
729 atomic_inc(&sp->so_count);
730 p->o_arg.fh = NFS_FH(dir);
731 p->o_arg.open_flags = flags;
732 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
733 p->o_arg.clientid = server->nfs_client->cl_clientid;
734 p->o_arg.id = sp->so_owner_id.id;
735 p->o_arg.name = &p->path.dentry->d_name;
736 p->o_arg.server = server;
737 p->o_arg.bitmask = server->attr_bitmask;
738 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
739 if (flags & O_EXCL) {
740 if (nfs4_has_persistent_session(server->nfs_client)) {
742 p->o_arg.u.attrs = &p->attrs;
743 memcpy(&p->attrs, attrs, sizeof(p->attrs));
744 } else { /* EXCLUSIVE4_1 */
745 u32 *s = (u32 *) p->o_arg.u.verifier.data;
749 } else if (flags & O_CREAT) {
750 p->o_arg.u.attrs = &p->attrs;
751 memcpy(&p->attrs, attrs, sizeof(p->attrs));
753 p->c_arg.fh = &p->o_res.fh;
754 p->c_arg.stateid = &p->o_res.stateid;
755 p->c_arg.seqid = p->o_arg.seqid;
756 nfs4_init_opendata_res(p);
766 static void nfs4_opendata_free(struct kref *kref)
768 struct nfs4_opendata *p = container_of(kref,
769 struct nfs4_opendata, kref);
771 nfs_free_seqid(p->o_arg.seqid);
772 if (p->state != NULL)
773 nfs4_put_open_state(p->state);
774 nfs4_put_state_owner(p->owner);
780 static void nfs4_opendata_put(struct nfs4_opendata *p)
783 kref_put(&p->kref, nfs4_opendata_free);
786 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
790 ret = rpc_wait_for_completion_task(task);
794 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
798 if (open_mode & O_EXCL)
800 switch (mode & (FMODE_READ|FMODE_WRITE)) {
802 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
803 && state->n_rdonly != 0;
806 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
807 && state->n_wronly != 0;
809 case FMODE_READ|FMODE_WRITE:
810 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
811 && state->n_rdwr != 0;
817 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
819 if ((delegation->type & fmode) != fmode)
821 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
823 nfs_mark_delegation_referenced(delegation);
827 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
836 case FMODE_READ|FMODE_WRITE:
839 nfs4_state_set_mode_locked(state, state->state | fmode);
842 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
844 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
845 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
846 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
849 set_bit(NFS_O_RDONLY_STATE, &state->flags);
852 set_bit(NFS_O_WRONLY_STATE, &state->flags);
854 case FMODE_READ|FMODE_WRITE:
855 set_bit(NFS_O_RDWR_STATE, &state->flags);
859 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
861 write_seqlock(&state->seqlock);
862 nfs_set_open_stateid_locked(state, stateid, fmode);
863 write_sequnlock(&state->seqlock);
866 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
869 * Protect the call to nfs4_state_set_mode_locked and
870 * serialise the stateid update
872 write_seqlock(&state->seqlock);
873 if (deleg_stateid != NULL) {
874 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
875 set_bit(NFS_DELEGATED_STATE, &state->flags);
877 if (open_stateid != NULL)
878 nfs_set_open_stateid_locked(state, open_stateid, fmode);
879 write_sequnlock(&state->seqlock);
880 spin_lock(&state->owner->so_lock);
881 update_open_stateflags(state, fmode);
882 spin_unlock(&state->owner->so_lock);
885 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
887 struct nfs_inode *nfsi = NFS_I(state->inode);
888 struct nfs_delegation *deleg_cur;
891 fmode &= (FMODE_READ|FMODE_WRITE);
894 deleg_cur = rcu_dereference(nfsi->delegation);
895 if (deleg_cur == NULL)
898 spin_lock(&deleg_cur->lock);
899 if (nfsi->delegation != deleg_cur ||
900 (deleg_cur->type & fmode) != fmode)
901 goto no_delegation_unlock;
903 if (delegation == NULL)
904 delegation = &deleg_cur->stateid;
905 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
906 goto no_delegation_unlock;
908 nfs_mark_delegation_referenced(deleg_cur);
909 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
911 no_delegation_unlock:
912 spin_unlock(&deleg_cur->lock);
916 if (!ret && open_stateid != NULL) {
917 __update_open_stateid(state, open_stateid, NULL, fmode);
925 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
927 struct nfs_delegation *delegation;
930 delegation = rcu_dereference(NFS_I(inode)->delegation);
931 if (delegation == NULL || (delegation->type & fmode) == fmode) {
936 nfs_inode_return_delegation(inode);
939 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
941 struct nfs4_state *state = opendata->state;
942 struct nfs_inode *nfsi = NFS_I(state->inode);
943 struct nfs_delegation *delegation;
944 int open_mode = opendata->o_arg.open_flags & O_EXCL;
945 fmode_t fmode = opendata->o_arg.fmode;
946 nfs4_stateid stateid;
950 if (can_open_cached(state, fmode, open_mode)) {
951 spin_lock(&state->owner->so_lock);
952 if (can_open_cached(state, fmode, open_mode)) {
953 update_open_stateflags(state, fmode);
954 spin_unlock(&state->owner->so_lock);
955 goto out_return_state;
957 spin_unlock(&state->owner->so_lock);
960 delegation = rcu_dereference(nfsi->delegation);
961 if (delegation == NULL ||
962 !can_open_delegated(delegation, fmode)) {
966 /* Save the delegation */
967 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
969 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
974 /* Try to update the stateid using the delegation */
975 if (update_open_stateid(state, NULL, &stateid, fmode))
976 goto out_return_state;
981 atomic_inc(&state->count);
985 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
988 struct nfs4_state *state = NULL;
989 struct nfs_delegation *delegation;
992 if (!data->rpc_done) {
993 state = nfs4_try_open_cached(data);
998 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1000 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1001 ret = PTR_ERR(inode);
1005 state = nfs4_get_open_state(inode, data->owner);
1008 if (data->o_res.delegation_type != 0) {
1009 int delegation_flags = 0;
1012 delegation = rcu_dereference(NFS_I(inode)->delegation);
1014 delegation_flags = delegation->flags;
1016 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1017 nfs_inode_set_delegation(state->inode,
1018 data->owner->so_cred,
1021 nfs_inode_reclaim_delegation(state->inode,
1022 data->owner->so_cred,
1026 update_open_stateid(state, &data->o_res.stateid, NULL,
1034 return ERR_PTR(ret);
1037 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1039 struct nfs_inode *nfsi = NFS_I(state->inode);
1040 struct nfs_open_context *ctx;
1042 spin_lock(&state->inode->i_lock);
1043 list_for_each_entry(ctx, &nfsi->open_files, list) {
1044 if (ctx->state != state)
1046 get_nfs_open_context(ctx);
1047 spin_unlock(&state->inode->i_lock);
1050 spin_unlock(&state->inode->i_lock);
1051 return ERR_PTR(-ENOENT);
1054 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1056 struct nfs4_opendata *opendata;
1058 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
1059 if (opendata == NULL)
1060 return ERR_PTR(-ENOMEM);
1061 opendata->state = state;
1062 atomic_inc(&state->count);
1066 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1068 struct nfs4_state *newstate;
1071 opendata->o_arg.open_flags = 0;
1072 opendata->o_arg.fmode = fmode;
1073 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1074 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1075 nfs4_init_opendata_res(opendata);
1076 ret = _nfs4_recover_proc_open(opendata);
1079 newstate = nfs4_opendata_to_nfs4_state(opendata);
1080 if (IS_ERR(newstate))
1081 return PTR_ERR(newstate);
1082 nfs4_close_state(&opendata->path, newstate, fmode);
1087 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1089 struct nfs4_state *newstate;
1092 /* memory barrier prior to reading state->n_* */
1093 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1095 if (state->n_rdwr != 0) {
1096 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1099 if (newstate != state)
1102 if (state->n_wronly != 0) {
1103 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1106 if (newstate != state)
1109 if (state->n_rdonly != 0) {
1110 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1113 if (newstate != state)
1117 * We may have performed cached opens for all three recoveries.
1118 * Check if we need to update the current stateid.
1120 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1121 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1122 write_seqlock(&state->seqlock);
1123 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1124 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1125 write_sequnlock(&state->seqlock);
1132 * reclaim state on the server after a reboot.
1134 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1136 struct nfs_delegation *delegation;
1137 struct nfs4_opendata *opendata;
1138 fmode_t delegation_type = 0;
1141 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1142 if (IS_ERR(opendata))
1143 return PTR_ERR(opendata);
1144 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1145 opendata->o_arg.fh = NFS_FH(state->inode);
1147 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1148 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1149 delegation_type = delegation->type;
1151 opendata->o_arg.u.delegation_type = delegation_type;
1152 status = nfs4_open_recover(opendata, state);
1153 nfs4_opendata_put(opendata);
1157 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1159 struct nfs_server *server = NFS_SERVER(state->inode);
1160 struct nfs4_exception exception = { };
1163 err = _nfs4_do_open_reclaim(ctx, state);
1164 if (err != -NFS4ERR_DELAY)
1166 nfs4_handle_exception(server, err, &exception);
1167 } while (exception.retry);
1171 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1173 struct nfs_open_context *ctx;
1176 ctx = nfs4_state_find_open_context(state);
1178 return PTR_ERR(ctx);
1179 ret = nfs4_do_open_reclaim(ctx, state);
1180 put_nfs_open_context(ctx);
1184 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1186 struct nfs4_opendata *opendata;
1189 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1190 if (IS_ERR(opendata))
1191 return PTR_ERR(opendata);
1192 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1193 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1194 sizeof(opendata->o_arg.u.delegation.data));
1195 ret = nfs4_open_recover(opendata, state);
1196 nfs4_opendata_put(opendata);
1200 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1202 struct nfs4_exception exception = { };
1203 struct nfs_server *server = NFS_SERVER(state->inode);
1206 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1212 case -NFS4ERR_BADSESSION:
1213 case -NFS4ERR_BADSLOT:
1214 case -NFS4ERR_BAD_HIGH_SLOT:
1215 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1216 case -NFS4ERR_DEADSESSION:
1217 nfs4_schedule_state_recovery(
1218 server->nfs_client);
1220 case -NFS4ERR_STALE_CLIENTID:
1221 case -NFS4ERR_STALE_STATEID:
1222 case -NFS4ERR_EXPIRED:
1223 /* Don't recall a delegation if it was lost */
1224 nfs4_schedule_state_recovery(server->nfs_client);
1228 * The show must go on: exit, but mark the
1229 * stateid as needing recovery.
1231 case -NFS4ERR_ADMIN_REVOKED:
1232 case -NFS4ERR_BAD_STATEID:
1233 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1238 err = nfs4_handle_exception(server, err, &exception);
1239 } while (exception.retry);
1244 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1246 struct nfs4_opendata *data = calldata;
1248 data->rpc_status = task->tk_status;
1249 if (RPC_ASSASSINATED(task))
1251 if (data->rpc_status == 0) {
1252 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1253 sizeof(data->o_res.stateid.data));
1254 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1255 renew_lease(data->o_res.server, data->timestamp);
1260 static void nfs4_open_confirm_release(void *calldata)
1262 struct nfs4_opendata *data = calldata;
1263 struct nfs4_state *state = NULL;
1265 /* If this request hasn't been cancelled, do nothing */
1266 if (data->cancelled == 0)
1268 /* In case of error, no cleanup! */
1269 if (!data->rpc_done)
1271 state = nfs4_opendata_to_nfs4_state(data);
1273 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1275 nfs4_opendata_put(data);
1278 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1279 .rpc_call_done = nfs4_open_confirm_done,
1280 .rpc_release = nfs4_open_confirm_release,
1284 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1286 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1288 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1289 struct rpc_task *task;
1290 struct rpc_message msg = {
1291 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1292 .rpc_argp = &data->c_arg,
1293 .rpc_resp = &data->c_res,
1294 .rpc_cred = data->owner->so_cred,
1296 struct rpc_task_setup task_setup_data = {
1297 .rpc_client = server->client,
1298 .rpc_message = &msg,
1299 .callback_ops = &nfs4_open_confirm_ops,
1300 .callback_data = data,
1301 .workqueue = nfsiod_workqueue,
1302 .flags = RPC_TASK_ASYNC,
1306 kref_get(&data->kref);
1308 data->rpc_status = 0;
1309 data->timestamp = jiffies;
1310 task = rpc_run_task(&task_setup_data);
1312 return PTR_ERR(task);
1313 status = nfs4_wait_for_completion_rpc_task(task);
1315 data->cancelled = 1;
1318 status = data->rpc_status;
1323 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1325 struct nfs4_opendata *data = calldata;
1326 struct nfs4_state_owner *sp = data->owner;
1328 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1331 * Check if we still need to send an OPEN call, or if we can use
1332 * a delegation instead.
1334 if (data->state != NULL) {
1335 struct nfs_delegation *delegation;
1337 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1340 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1341 if (delegation != NULL &&
1342 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1348 /* Update sequence id. */
1349 data->o_arg.id = sp->so_owner_id.id;
1350 data->o_arg.clientid = sp->so_client->cl_clientid;
1351 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1352 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1353 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1355 data->timestamp = jiffies;
1356 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1357 &data->o_arg.seq_args,
1358 &data->o_res.seq_res, 1, task))
1360 rpc_call_start(task);
1363 task->tk_action = NULL;
1367 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1369 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1370 nfs4_open_prepare(task, calldata);
1373 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1375 struct nfs4_opendata *data = calldata;
1377 data->rpc_status = task->tk_status;
1379 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1382 if (RPC_ASSASSINATED(task))
1384 if (task->tk_status == 0) {
1385 switch (data->o_res.f_attr->mode & S_IFMT) {
1389 data->rpc_status = -ELOOP;
1392 data->rpc_status = -EISDIR;
1395 data->rpc_status = -ENOTDIR;
1397 renew_lease(data->o_res.server, data->timestamp);
1398 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1399 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1404 static void nfs4_open_release(void *calldata)
1406 struct nfs4_opendata *data = calldata;
1407 struct nfs4_state *state = NULL;
1409 /* If this request hasn't been cancelled, do nothing */
1410 if (data->cancelled == 0)
1412 /* In case of error, no cleanup! */
1413 if (data->rpc_status != 0 || !data->rpc_done)
1415 /* In case we need an open_confirm, no cleanup! */
1416 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1418 state = nfs4_opendata_to_nfs4_state(data);
1420 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1422 nfs4_opendata_put(data);
1425 static const struct rpc_call_ops nfs4_open_ops = {
1426 .rpc_call_prepare = nfs4_open_prepare,
1427 .rpc_call_done = nfs4_open_done,
1428 .rpc_release = nfs4_open_release,
1431 static const struct rpc_call_ops nfs4_recover_open_ops = {
1432 .rpc_call_prepare = nfs4_recover_open_prepare,
1433 .rpc_call_done = nfs4_open_done,
1434 .rpc_release = nfs4_open_release,
1437 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1439 struct inode *dir = data->dir->d_inode;
1440 struct nfs_server *server = NFS_SERVER(dir);
1441 struct nfs_openargs *o_arg = &data->o_arg;
1442 struct nfs_openres *o_res = &data->o_res;
1443 struct rpc_task *task;
1444 struct rpc_message msg = {
1445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1448 .rpc_cred = data->owner->so_cred,
1450 struct rpc_task_setup task_setup_data = {
1451 .rpc_client = server->client,
1452 .rpc_message = &msg,
1453 .callback_ops = &nfs4_open_ops,
1454 .callback_data = data,
1455 .workqueue = nfsiod_workqueue,
1456 .flags = RPC_TASK_ASYNC,
1460 kref_get(&data->kref);
1462 data->rpc_status = 0;
1463 data->cancelled = 0;
1465 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1466 task = rpc_run_task(&task_setup_data);
1468 return PTR_ERR(task);
1469 status = nfs4_wait_for_completion_rpc_task(task);
1471 data->cancelled = 1;
1474 status = data->rpc_status;
1480 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1482 struct inode *dir = data->dir->d_inode;
1483 struct nfs_openres *o_res = &data->o_res;
1486 status = nfs4_run_open_task(data, 1);
1487 if (status != 0 || !data->rpc_done)
1490 nfs_refresh_inode(dir, o_res->dir_attr);
1492 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1493 status = _nfs4_proc_open_confirm(data);
1502 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1504 static int _nfs4_proc_open(struct nfs4_opendata *data)
1506 struct inode *dir = data->dir->d_inode;
1507 struct nfs_server *server = NFS_SERVER(dir);
1508 struct nfs_openargs *o_arg = &data->o_arg;
1509 struct nfs_openres *o_res = &data->o_res;
1512 status = nfs4_run_open_task(data, 0);
1513 if (status != 0 || !data->rpc_done)
1516 if (o_arg->open_flags & O_CREAT) {
1517 update_changeattr(dir, &o_res->cinfo);
1518 nfs_post_op_update_inode(dir, o_res->dir_attr);
1520 nfs_refresh_inode(dir, o_res->dir_attr);
1521 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1522 status = _nfs4_proc_open_confirm(data);
1526 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1527 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1531 static int nfs4_recover_expired_lease(struct nfs_server *server)
1533 struct nfs_client *clp = server->nfs_client;
1537 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1538 ret = nfs4_wait_clnt_recover(clp);
1541 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1542 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1544 nfs4_schedule_state_recovery(clp);
1552 * reclaim state on the server after a network partition.
1553 * Assumes caller holds the appropriate lock
1555 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1557 struct nfs4_opendata *opendata;
1560 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1561 if (IS_ERR(opendata))
1562 return PTR_ERR(opendata);
1563 ret = nfs4_open_recover(opendata, state);
1565 d_drop(ctx->path.dentry);
1566 nfs4_opendata_put(opendata);
1570 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1572 struct nfs_server *server = NFS_SERVER(state->inode);
1573 struct nfs4_exception exception = { };
1577 err = _nfs4_open_expired(ctx, state);
1581 case -NFS4ERR_GRACE:
1582 case -NFS4ERR_DELAY:
1583 nfs4_handle_exception(server, err, &exception);
1586 } while (exception.retry);
1591 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1593 struct nfs_open_context *ctx;
1596 ctx = nfs4_state_find_open_context(state);
1598 return PTR_ERR(ctx);
1599 ret = nfs4_do_open_expired(ctx, state);
1600 put_nfs_open_context(ctx);
1605 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1606 * fields corresponding to attributes that were used to store the verifier.
1607 * Make sure we clobber those fields in the later setattr call
1609 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1611 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1612 !(sattr->ia_valid & ATTR_ATIME_SET))
1613 sattr->ia_valid |= ATTR_ATIME;
1615 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1616 !(sattr->ia_valid & ATTR_MTIME_SET))
1617 sattr->ia_valid |= ATTR_MTIME;
1621 * Returns a referenced nfs4_state
1623 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)
1625 struct nfs4_state_owner *sp;
1626 struct nfs4_state *state = NULL;
1627 struct nfs_server *server = NFS_SERVER(dir);
1628 struct nfs4_opendata *opendata;
1631 /* Protect against reboot recovery conflicts */
1633 if (!(sp = nfs4_get_state_owner(server, cred))) {
1634 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1637 status = nfs4_recover_expired_lease(server);
1639 goto err_put_state_owner;
1640 if (path->dentry->d_inode != NULL)
1641 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1643 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1644 if (opendata == NULL)
1645 goto err_put_state_owner;
1647 if (path->dentry->d_inode != NULL)
1648 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1650 status = _nfs4_proc_open(opendata);
1652 goto err_opendata_put;
1654 if (opendata->o_arg.open_flags & O_EXCL)
1655 nfs4_exclusive_attrset(opendata, sattr);
1657 state = nfs4_opendata_to_nfs4_state(opendata);
1658 status = PTR_ERR(state);
1660 goto err_opendata_put;
1661 nfs4_opendata_put(opendata);
1662 nfs4_put_state_owner(sp);
1666 nfs4_opendata_put(opendata);
1667 err_put_state_owner:
1668 nfs4_put_state_owner(sp);
1675 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)
1677 struct nfs4_exception exception = { };
1678 struct nfs4_state *res;
1682 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1685 /* NOTE: BAD_SEQID means the server and client disagree about the
1686 * book-keeping w.r.t. state-changing operations
1687 * (OPEN/CLOSE/LOCK/LOCKU...)
1688 * It is actually a sign of a bug on the client or on the server.
1690 * If we receive a BAD_SEQID error in the particular case of
1691 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1692 * have unhashed the old state_owner for us, and that we can
1693 * therefore safely retry using a new one. We should still warn
1694 * the user though...
1696 if (status == -NFS4ERR_BAD_SEQID) {
1697 printk(KERN_WARNING "NFS: v4 server %s "
1698 " returned a bad sequence-id error!\n",
1699 NFS_SERVER(dir)->nfs_client->cl_hostname);
1700 exception.retry = 1;
1704 * BAD_STATEID on OPEN means that the server cancelled our
1705 * state before it received the OPEN_CONFIRM.
1706 * Recover by retrying the request as per the discussion
1707 * on Page 181 of RFC3530.
1709 if (status == -NFS4ERR_BAD_STATEID) {
1710 exception.retry = 1;
1713 if (status == -EAGAIN) {
1714 /* We must have found a delegation */
1715 exception.retry = 1;
1718 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1719 status, &exception));
1720 } while (exception.retry);
1724 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1725 struct nfs_fattr *fattr, struct iattr *sattr,
1726 struct nfs4_state *state)
1728 struct nfs_server *server = NFS_SERVER(inode);
1729 struct nfs_setattrargs arg = {
1730 .fh = NFS_FH(inode),
1733 .bitmask = server->attr_bitmask,
1735 struct nfs_setattrres res = {
1739 struct rpc_message msg = {
1740 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1745 unsigned long timestamp = jiffies;
1748 nfs_fattr_init(fattr);
1750 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1751 /* Use that stateid */
1752 } else if (state != NULL) {
1753 nfs4_copy_stateid(&arg.stateid, state, current->files);
1755 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1757 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1758 if (status == 0 && state != NULL)
1759 renew_lease(server, timestamp);
1763 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1764 struct nfs_fattr *fattr, struct iattr *sattr,
1765 struct nfs4_state *state)
1767 struct nfs_server *server = NFS_SERVER(inode);
1768 struct nfs4_exception exception = { };
1771 err = nfs4_handle_exception(server,
1772 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1774 } while (exception.retry);
1778 struct nfs4_closedata {
1780 struct inode *inode;
1781 struct nfs4_state *state;
1782 struct nfs_closeargs arg;
1783 struct nfs_closeres res;
1784 struct nfs_fattr fattr;
1785 unsigned long timestamp;
1788 static void nfs4_free_closedata(void *data)
1790 struct nfs4_closedata *calldata = data;
1791 struct nfs4_state_owner *sp = calldata->state->owner;
1793 nfs4_put_open_state(calldata->state);
1794 nfs_free_seqid(calldata->arg.seqid);
1795 nfs4_put_state_owner(sp);
1796 path_put(&calldata->path);
1800 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1803 spin_lock(&state->owner->so_lock);
1804 if (!(fmode & FMODE_READ))
1805 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1806 if (!(fmode & FMODE_WRITE))
1807 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1808 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1809 spin_unlock(&state->owner->so_lock);
1812 static void nfs4_close_done(struct rpc_task *task, void *data)
1814 struct nfs4_closedata *calldata = data;
1815 struct nfs4_state *state = calldata->state;
1816 struct nfs_server *server = NFS_SERVER(calldata->inode);
1818 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
1819 if (RPC_ASSASSINATED(task))
1821 /* hmm. we are done with the inode, and in the process of freeing
1822 * the state_owner. we keep this around to process errors
1824 switch (task->tk_status) {
1826 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1827 renew_lease(server, calldata->timestamp);
1828 nfs4_close_clear_stateid_flags(state,
1829 calldata->arg.fmode);
1831 case -NFS4ERR_STALE_STATEID:
1832 case -NFS4ERR_OLD_STATEID:
1833 case -NFS4ERR_BAD_STATEID:
1834 case -NFS4ERR_EXPIRED:
1835 if (calldata->arg.fmode == 0)
1838 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1839 nfs_restart_rpc(task, server->nfs_client);
1843 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1846 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1848 struct nfs4_closedata *calldata = data;
1849 struct nfs4_state *state = calldata->state;
1852 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1855 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1856 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
1857 spin_lock(&state->owner->so_lock);
1858 /* Calculate the change in open mode */
1859 if (state->n_rdwr == 0) {
1860 if (state->n_rdonly == 0) {
1861 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1862 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1863 calldata->arg.fmode &= ~FMODE_READ;
1865 if (state->n_wronly == 0) {
1866 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1867 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1868 calldata->arg.fmode &= ~FMODE_WRITE;
1871 spin_unlock(&state->owner->so_lock);
1874 /* Note: exit _without_ calling nfs4_close_done */
1875 task->tk_action = NULL;
1879 if (calldata->arg.fmode == 0)
1880 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1882 nfs_fattr_init(calldata->res.fattr);
1883 calldata->timestamp = jiffies;
1884 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1885 &calldata->arg.seq_args, &calldata->res.seq_res,
1888 rpc_call_start(task);
1891 static const struct rpc_call_ops nfs4_close_ops = {
1892 .rpc_call_prepare = nfs4_close_prepare,
1893 .rpc_call_done = nfs4_close_done,
1894 .rpc_release = nfs4_free_closedata,
1898 * It is possible for data to be read/written from a mem-mapped file
1899 * after the sys_close call (which hits the vfs layer as a flush).
1900 * This means that we can't safely call nfsv4 close on a file until
1901 * the inode is cleared. This in turn means that we are not good
1902 * NFSv4 citizens - we do not indicate to the server to update the file's
1903 * share state even when we are done with one of the three share
1904 * stateid's in the inode.
1906 * NOTE: Caller must be holding the sp->so_owner semaphore!
1908 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1910 struct nfs_server *server = NFS_SERVER(state->inode);
1911 struct nfs4_closedata *calldata;
1912 struct nfs4_state_owner *sp = state->owner;
1913 struct rpc_task *task;
1914 struct rpc_message msg = {
1915 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1916 .rpc_cred = state->owner->so_cred,
1918 struct rpc_task_setup task_setup_data = {
1919 .rpc_client = server->client,
1920 .rpc_message = &msg,
1921 .callback_ops = &nfs4_close_ops,
1922 .workqueue = nfsiod_workqueue,
1923 .flags = RPC_TASK_ASYNC,
1925 int status = -ENOMEM;
1927 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1928 if (calldata == NULL)
1930 calldata->inode = state->inode;
1931 calldata->state = state;
1932 calldata->arg.fh = NFS_FH(state->inode);
1933 calldata->arg.stateid = &state->open_stateid;
1934 /* Serialization for the sequence id */
1935 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1936 if (calldata->arg.seqid == NULL)
1937 goto out_free_calldata;
1938 calldata->arg.fmode = 0;
1939 calldata->arg.bitmask = server->cache_consistency_bitmask;
1940 calldata->res.fattr = &calldata->fattr;
1941 calldata->res.seqid = calldata->arg.seqid;
1942 calldata->res.server = server;
1943 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
1944 calldata->path.mnt = mntget(path->mnt);
1945 calldata->path.dentry = dget(path->dentry);
1947 msg.rpc_argp = &calldata->arg,
1948 msg.rpc_resp = &calldata->res,
1949 task_setup_data.callback_data = calldata;
1950 task = rpc_run_task(&task_setup_data);
1952 return PTR_ERR(task);
1955 status = rpc_wait_for_completion_task(task);
1961 nfs4_put_open_state(state);
1962 nfs4_put_state_owner(sp);
1966 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1971 /* If the open_intent is for execute, we have an extra check to make */
1972 if (fmode & FMODE_EXEC) {
1973 ret = nfs_may_open(state->inode,
1974 state->owner->so_cred,
1975 nd->intent.open.flags);
1979 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1980 if (!IS_ERR(filp)) {
1981 struct nfs_open_context *ctx;
1982 ctx = nfs_file_open_context(filp);
1986 ret = PTR_ERR(filp);
1988 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1993 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1995 struct path path = {
1996 .mnt = nd->path.mnt,
1999 struct dentry *parent;
2001 struct rpc_cred *cred;
2002 struct nfs4_state *state;
2004 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
2006 if (nd->flags & LOOKUP_CREATE) {
2007 attr.ia_mode = nd->intent.open.create_mode;
2008 attr.ia_valid = ATTR_MODE;
2009 if (!IS_POSIXACL(dir))
2010 attr.ia_mode &= ~current_umask();
2013 BUG_ON(nd->intent.open.flags & O_CREAT);
2016 cred = rpc_lookup_cred();
2018 return (struct dentry *)cred;
2019 parent = dentry->d_parent;
2020 /* Protect against concurrent sillydeletes */
2021 nfs_block_sillyrename(parent);
2022 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
2024 if (IS_ERR(state)) {
2025 if (PTR_ERR(state) == -ENOENT) {
2026 d_add(dentry, NULL);
2027 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2029 nfs_unblock_sillyrename(parent);
2030 return (struct dentry *)state;
2032 res = d_add_unique(dentry, igrab(state->inode));
2035 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
2036 nfs_unblock_sillyrename(parent);
2037 nfs4_intent_set_file(nd, &path, state, fmode);
2042 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
2044 struct path path = {
2045 .mnt = nd->path.mnt,
2048 struct rpc_cred *cred;
2049 struct nfs4_state *state;
2050 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
2052 cred = rpc_lookup_cred();
2054 return PTR_ERR(cred);
2055 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
2057 if (IS_ERR(state)) {
2058 switch (PTR_ERR(state)) {
2064 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
2070 if (state->inode == dentry->d_inode) {
2071 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2072 nfs4_intent_set_file(nd, &path, state, fmode);
2075 nfs4_close_sync(&path, state, fmode);
2081 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2083 if (ctx->state == NULL)
2086 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2088 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2091 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2093 struct nfs4_server_caps_arg args = {
2096 struct nfs4_server_caps_res res = {};
2097 struct rpc_message msg = {
2098 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2104 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2106 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2107 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2108 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2109 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2110 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2111 NFS_CAP_CTIME|NFS_CAP_MTIME);
2112 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2113 server->caps |= NFS_CAP_ACLS;
2114 if (res.has_links != 0)
2115 server->caps |= NFS_CAP_HARDLINKS;
2116 if (res.has_symlinks != 0)
2117 server->caps |= NFS_CAP_SYMLINKS;
2118 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2119 server->caps |= NFS_CAP_FILEID;
2120 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2121 server->caps |= NFS_CAP_MODE;
2122 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2123 server->caps |= NFS_CAP_NLINK;
2124 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2125 server->caps |= NFS_CAP_OWNER;
2126 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2127 server->caps |= NFS_CAP_OWNER_GROUP;
2128 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2129 server->caps |= NFS_CAP_ATIME;
2130 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2131 server->caps |= NFS_CAP_CTIME;
2132 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2133 server->caps |= NFS_CAP_MTIME;
2135 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2136 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2137 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2138 server->acl_bitmask = res.acl_bitmask;
2144 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2146 struct nfs4_exception exception = { };
2149 err = nfs4_handle_exception(server,
2150 _nfs4_server_capabilities(server, fhandle),
2152 } while (exception.retry);
2156 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2157 struct nfs_fsinfo *info)
2159 struct nfs4_lookup_root_arg args = {
2160 .bitmask = nfs4_fattr_bitmap,
2162 struct nfs4_lookup_res res = {
2164 .fattr = info->fattr,
2167 struct rpc_message msg = {
2168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2173 nfs_fattr_init(info->fattr);
2174 return nfs4_call_sync(server, &msg, &args, &res, 0);
2177 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2178 struct nfs_fsinfo *info)
2180 struct nfs4_exception exception = { };
2183 err = nfs4_handle_exception(server,
2184 _nfs4_lookup_root(server, fhandle, info),
2186 } while (exception.retry);
2191 * get the file handle for the "/" directory on the server
2193 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2194 struct nfs_fsinfo *info)
2198 status = nfs4_lookup_root(server, fhandle, info);
2200 status = nfs4_server_capabilities(server, fhandle);
2202 status = nfs4_do_fsinfo(server, fhandle, info);
2203 return nfs4_map_errors(status);
2207 * Get locations and (maybe) other attributes of a referral.
2208 * Note that we'll actually follow the referral later when
2209 * we detect fsid mismatch in inode revalidation
2211 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2213 int status = -ENOMEM;
2214 struct page *page = NULL;
2215 struct nfs4_fs_locations *locations = NULL;
2217 page = alloc_page(GFP_KERNEL);
2220 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2221 if (locations == NULL)
2224 status = nfs4_proc_fs_locations(dir, name, locations, page);
2227 /* Make sure server returned a different fsid for the referral */
2228 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2229 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2234 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2235 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2237 fattr->mode = S_IFDIR;
2238 memset(fhandle, 0, sizeof(struct nfs_fh));
2247 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2249 struct nfs4_getattr_arg args = {
2251 .bitmask = server->attr_bitmask,
2253 struct nfs4_getattr_res res = {
2257 struct rpc_message msg = {
2258 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2263 nfs_fattr_init(fattr);
2264 return nfs4_call_sync(server, &msg, &args, &res, 0);
2267 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2269 struct nfs4_exception exception = { };
2272 err = nfs4_handle_exception(server,
2273 _nfs4_proc_getattr(server, fhandle, fattr),
2275 } while (exception.retry);
2280 * The file is not closed if it is opened due to the a request to change
2281 * the size of the file. The open call will not be needed once the
2282 * VFS layer lookup-intents are implemented.
2284 * Close is called when the inode is destroyed.
2285 * If we haven't opened the file for O_WRONLY, we
2286 * need to in the size_change case to obtain a stateid.
2289 * Because OPEN is always done by name in nfsv4, it is
2290 * possible that we opened a different file by the same
2291 * name. We can recognize this race condition, but we
2292 * can't do anything about it besides returning an error.
2294 * This will be fixed with VFS changes (lookup-intent).
2297 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2298 struct iattr *sattr)
2300 struct inode *inode = dentry->d_inode;
2301 struct rpc_cred *cred = NULL;
2302 struct nfs4_state *state = NULL;
2305 nfs_fattr_init(fattr);
2307 /* Search for an existing open(O_WRITE) file */
2308 if (sattr->ia_valid & ATTR_FILE) {
2309 struct nfs_open_context *ctx;
2311 ctx = nfs_file_open_context(sattr->ia_file);
2318 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2320 nfs_setattr_update_inode(inode, sattr);
2324 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2325 const struct qstr *name, struct nfs_fh *fhandle,
2326 struct nfs_fattr *fattr)
2329 struct nfs4_lookup_arg args = {
2330 .bitmask = server->attr_bitmask,
2334 struct nfs4_lookup_res res = {
2339 struct rpc_message msg = {
2340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2345 nfs_fattr_init(fattr);
2347 dprintk("NFS call lookupfh %s\n", name->name);
2348 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2349 dprintk("NFS reply lookupfh: %d\n", status);
2353 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2354 struct qstr *name, struct nfs_fh *fhandle,
2355 struct nfs_fattr *fattr)
2357 struct nfs4_exception exception = { };
2360 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2362 if (err == -NFS4ERR_MOVED) {
2366 err = nfs4_handle_exception(server, err, &exception);
2367 } while (exception.retry);
2371 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2372 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2376 dprintk("NFS call lookup %s\n", name->name);
2377 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2378 if (status == -NFS4ERR_MOVED)
2379 status = nfs4_get_referral(dir, name, fattr, fhandle);
2380 dprintk("NFS reply lookup: %d\n", status);
2384 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2386 struct nfs4_exception exception = { };
2389 err = nfs4_handle_exception(NFS_SERVER(dir),
2390 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2392 } while (exception.retry);
2396 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2398 struct nfs_server *server = NFS_SERVER(inode);
2399 struct nfs_fattr fattr;
2400 struct nfs4_accessargs args = {
2401 .fh = NFS_FH(inode),
2402 .bitmask = server->attr_bitmask,
2404 struct nfs4_accessres res = {
2408 struct rpc_message msg = {
2409 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2412 .rpc_cred = entry->cred,
2414 int mode = entry->mask;
2418 * Determine which access bits we want to ask for...
2420 if (mode & MAY_READ)
2421 args.access |= NFS4_ACCESS_READ;
2422 if (S_ISDIR(inode->i_mode)) {
2423 if (mode & MAY_WRITE)
2424 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2425 if (mode & MAY_EXEC)
2426 args.access |= NFS4_ACCESS_LOOKUP;
2428 if (mode & MAY_WRITE)
2429 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2430 if (mode & MAY_EXEC)
2431 args.access |= NFS4_ACCESS_EXECUTE;
2433 nfs_fattr_init(&fattr);
2434 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2437 if (res.access & NFS4_ACCESS_READ)
2438 entry->mask |= MAY_READ;
2439 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2440 entry->mask |= MAY_WRITE;
2441 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2442 entry->mask |= MAY_EXEC;
2443 nfs_refresh_inode(inode, &fattr);
2448 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2450 struct nfs4_exception exception = { };
2453 err = nfs4_handle_exception(NFS_SERVER(inode),
2454 _nfs4_proc_access(inode, entry),
2456 } while (exception.retry);
2461 * TODO: For the time being, we don't try to get any attributes
2462 * along with any of the zero-copy operations READ, READDIR,
2465 * In the case of the first three, we want to put the GETATTR
2466 * after the read-type operation -- this is because it is hard
2467 * to predict the length of a GETATTR response in v4, and thus
2468 * align the READ data correctly. This means that the GETATTR
2469 * may end up partially falling into the page cache, and we should
2470 * shift it into the 'tail' of the xdr_buf before processing.
2471 * To do this efficiently, we need to know the total length
2472 * of data received, which doesn't seem to be available outside
2475 * In the case of WRITE, we also want to put the GETATTR after
2476 * the operation -- in this case because we want to make sure
2477 * we get the post-operation mtime and size. This means that
2478 * we can't use xdr_encode_pages() as written: we need a variant
2479 * of it which would leave room in the 'tail' iovec.
2481 * Both of these changes to the XDR layer would in fact be quite
2482 * minor, but I decided to leave them for a subsequent patch.
2484 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2485 unsigned int pgbase, unsigned int pglen)
2487 struct nfs4_readlink args = {
2488 .fh = NFS_FH(inode),
2493 struct nfs4_readlink_res res;
2494 struct rpc_message msg = {
2495 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2500 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2503 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2504 unsigned int pgbase, unsigned int pglen)
2506 struct nfs4_exception exception = { };
2509 err = nfs4_handle_exception(NFS_SERVER(inode),
2510 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2512 } while (exception.retry);
2518 * We will need to arrange for the VFS layer to provide an atomic open.
2519 * Until then, this create/open method is prone to inefficiency and race
2520 * conditions due to the lookup, create, and open VFS calls from sys_open()
2521 * placed on the wire.
2523 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2524 * The file will be opened again in the subsequent VFS open call
2525 * (nfs4_proc_file_open).
2527 * The open for read will just hang around to be used by any process that
2528 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2532 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2533 int flags, struct nameidata *nd)
2535 struct path path = {
2536 .mnt = nd->path.mnt,
2539 struct nfs4_state *state;
2540 struct rpc_cred *cred;
2541 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2544 cred = rpc_lookup_cred();
2546 status = PTR_ERR(cred);
2549 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2551 if (IS_ERR(state)) {
2552 status = PTR_ERR(state);
2555 d_add(dentry, igrab(state->inode));
2556 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2557 if (flags & O_EXCL) {
2558 struct nfs_fattr fattr;
2559 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2561 nfs_setattr_update_inode(state->inode, sattr);
2562 nfs_post_op_update_inode(state->inode, &fattr);
2564 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2565 status = nfs4_intent_set_file(nd, &path, state, fmode);
2567 nfs4_close_sync(&path, state, fmode);
2574 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2576 struct nfs_server *server = NFS_SERVER(dir);
2577 struct nfs_removeargs args = {
2579 .name.len = name->len,
2580 .name.name = name->name,
2581 .bitmask = server->attr_bitmask,
2583 struct nfs_removeres res = {
2586 struct rpc_message msg = {
2587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2593 nfs_fattr_init(&res.dir_attr);
2594 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2596 update_changeattr(dir, &res.cinfo);
2597 nfs_post_op_update_inode(dir, &res.dir_attr);
2602 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2604 struct nfs4_exception exception = { };
2607 err = nfs4_handle_exception(NFS_SERVER(dir),
2608 _nfs4_proc_remove(dir, name),
2610 } while (exception.retry);
2614 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2616 struct nfs_server *server = NFS_SERVER(dir);
2617 struct nfs_removeargs *args = msg->rpc_argp;
2618 struct nfs_removeres *res = msg->rpc_resp;
2620 args->bitmask = server->cache_consistency_bitmask;
2621 res->server = server;
2622 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2625 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2627 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2629 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
2630 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2632 update_changeattr(dir, &res->cinfo);
2633 nfs_post_op_update_inode(dir, &res->dir_attr);
2637 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2638 struct inode *new_dir, struct qstr *new_name)
2640 struct nfs_server *server = NFS_SERVER(old_dir);
2641 struct nfs4_rename_arg arg = {
2642 .old_dir = NFS_FH(old_dir),
2643 .new_dir = NFS_FH(new_dir),
2644 .old_name = old_name,
2645 .new_name = new_name,
2646 .bitmask = server->attr_bitmask,
2648 struct nfs_fattr old_fattr, new_fattr;
2649 struct nfs4_rename_res res = {
2651 .old_fattr = &old_fattr,
2652 .new_fattr = &new_fattr,
2654 struct rpc_message msg = {
2655 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2661 nfs_fattr_init(res.old_fattr);
2662 nfs_fattr_init(res.new_fattr);
2663 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2666 update_changeattr(old_dir, &res.old_cinfo);
2667 nfs_post_op_update_inode(old_dir, res.old_fattr);
2668 update_changeattr(new_dir, &res.new_cinfo);
2669 nfs_post_op_update_inode(new_dir, res.new_fattr);
2674 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2675 struct inode *new_dir, struct qstr *new_name)
2677 struct nfs4_exception exception = { };
2680 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2681 _nfs4_proc_rename(old_dir, old_name,
2684 } while (exception.retry);
2688 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2690 struct nfs_server *server = NFS_SERVER(inode);
2691 struct nfs4_link_arg arg = {
2692 .fh = NFS_FH(inode),
2693 .dir_fh = NFS_FH(dir),
2695 .bitmask = server->attr_bitmask,
2697 struct nfs_fattr fattr, dir_attr;
2698 struct nfs4_link_res res = {
2701 .dir_attr = &dir_attr,
2703 struct rpc_message msg = {
2704 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2710 nfs_fattr_init(res.fattr);
2711 nfs_fattr_init(res.dir_attr);
2712 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2714 update_changeattr(dir, &res.cinfo);
2715 nfs_post_op_update_inode(dir, res.dir_attr);
2716 nfs_post_op_update_inode(inode, res.fattr);
2722 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2724 struct nfs4_exception exception = { };
2727 err = nfs4_handle_exception(NFS_SERVER(inode),
2728 _nfs4_proc_link(inode, dir, name),
2730 } while (exception.retry);
2734 struct nfs4_createdata {
2735 struct rpc_message msg;
2736 struct nfs4_create_arg arg;
2737 struct nfs4_create_res res;
2739 struct nfs_fattr fattr;
2740 struct nfs_fattr dir_fattr;
2743 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2744 struct qstr *name, struct iattr *sattr, u32 ftype)
2746 struct nfs4_createdata *data;
2748 data = kzalloc(sizeof(*data), GFP_KERNEL);
2750 struct nfs_server *server = NFS_SERVER(dir);
2752 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2753 data->msg.rpc_argp = &data->arg;
2754 data->msg.rpc_resp = &data->res;
2755 data->arg.dir_fh = NFS_FH(dir);
2756 data->arg.server = server;
2757 data->arg.name = name;
2758 data->arg.attrs = sattr;
2759 data->arg.ftype = ftype;
2760 data->arg.bitmask = server->attr_bitmask;
2761 data->res.server = server;
2762 data->res.fh = &data->fh;
2763 data->res.fattr = &data->fattr;
2764 data->res.dir_fattr = &data->dir_fattr;
2765 nfs_fattr_init(data->res.fattr);
2766 nfs_fattr_init(data->res.dir_fattr);
2771 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2773 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2774 &data->arg, &data->res, 1);
2776 update_changeattr(dir, &data->res.dir_cinfo);
2777 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2778 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2783 static void nfs4_free_createdata(struct nfs4_createdata *data)
2788 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2789 struct page *page, unsigned int len, struct iattr *sattr)
2791 struct nfs4_createdata *data;
2792 int status = -ENAMETOOLONG;
2794 if (len > NFS4_MAXPATHLEN)
2798 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2802 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2803 data->arg.u.symlink.pages = &page;
2804 data->arg.u.symlink.len = len;
2806 status = nfs4_do_create(dir, dentry, data);
2808 nfs4_free_createdata(data);
2813 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2814 struct page *page, unsigned int len, struct iattr *sattr)
2816 struct nfs4_exception exception = { };
2819 err = nfs4_handle_exception(NFS_SERVER(dir),
2820 _nfs4_proc_symlink(dir, dentry, page,
2823 } while (exception.retry);
2827 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2828 struct iattr *sattr)
2830 struct nfs4_createdata *data;
2831 int status = -ENOMEM;
2833 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2837 status = nfs4_do_create(dir, dentry, data);
2839 nfs4_free_createdata(data);
2844 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2845 struct iattr *sattr)
2847 struct nfs4_exception exception = { };
2850 err = nfs4_handle_exception(NFS_SERVER(dir),
2851 _nfs4_proc_mkdir(dir, dentry, sattr),
2853 } while (exception.retry);
2857 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2858 u64 cookie, struct page *page, unsigned int count, int plus)
2860 struct inode *dir = dentry->d_inode;
2861 struct nfs4_readdir_arg args = {
2866 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2868 struct nfs4_readdir_res res;
2869 struct rpc_message msg = {
2870 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2877 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2878 dentry->d_parent->d_name.name,
2879 dentry->d_name.name,
2880 (unsigned long long)cookie);
2881 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2882 res.pgbase = args.pgbase;
2883 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2885 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2887 nfs_invalidate_atime(dir);
2889 dprintk("%s: returns %d\n", __func__, status);
2893 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2894 u64 cookie, struct page *page, unsigned int count, int plus)
2896 struct nfs4_exception exception = { };
2899 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2900 _nfs4_proc_readdir(dentry, cred, cookie,
2903 } while (exception.retry);
2907 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2908 struct iattr *sattr, dev_t rdev)
2910 struct nfs4_createdata *data;
2911 int mode = sattr->ia_mode;
2912 int status = -ENOMEM;
2914 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2915 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2917 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2922 data->arg.ftype = NF4FIFO;
2923 else if (S_ISBLK(mode)) {
2924 data->arg.ftype = NF4BLK;
2925 data->arg.u.device.specdata1 = MAJOR(rdev);
2926 data->arg.u.device.specdata2 = MINOR(rdev);
2928 else if (S_ISCHR(mode)) {
2929 data->arg.ftype = NF4CHR;
2930 data->arg.u.device.specdata1 = MAJOR(rdev);
2931 data->arg.u.device.specdata2 = MINOR(rdev);
2934 status = nfs4_do_create(dir, dentry, data);
2936 nfs4_free_createdata(data);
2941 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2942 struct iattr *sattr, dev_t rdev)
2944 struct nfs4_exception exception = { };
2947 err = nfs4_handle_exception(NFS_SERVER(dir),
2948 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2950 } while (exception.retry);
2954 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2955 struct nfs_fsstat *fsstat)
2957 struct nfs4_statfs_arg args = {
2959 .bitmask = server->attr_bitmask,
2961 struct nfs4_statfs_res res = {
2964 struct rpc_message msg = {
2965 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2970 nfs_fattr_init(fsstat->fattr);
2971 return nfs4_call_sync(server, &msg, &args, &res, 0);
2974 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2976 struct nfs4_exception exception = { };
2979 err = nfs4_handle_exception(server,
2980 _nfs4_proc_statfs(server, fhandle, fsstat),
2982 } while (exception.retry);
2986 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2987 struct nfs_fsinfo *fsinfo)
2989 struct nfs4_fsinfo_arg args = {
2991 .bitmask = server->attr_bitmask,
2993 struct nfs4_fsinfo_res res = {
2996 struct rpc_message msg = {
2997 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3002 return nfs4_call_sync(server, &msg, &args, &res, 0);
3005 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3007 struct nfs4_exception exception = { };
3011 err = nfs4_handle_exception(server,
3012 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3014 } while (exception.retry);
3018 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3020 nfs_fattr_init(fsinfo->fattr);
3021 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3024 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3025 struct nfs_pathconf *pathconf)
3027 struct nfs4_pathconf_arg args = {
3029 .bitmask = server->attr_bitmask,
3031 struct nfs4_pathconf_res res = {
3032 .pathconf = pathconf,
3034 struct rpc_message msg = {
3035 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3040 /* None of the pathconf attributes are mandatory to implement */
3041 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3042 memset(pathconf, 0, sizeof(*pathconf));
3046 nfs_fattr_init(pathconf->fattr);
3047 return nfs4_call_sync(server, &msg, &args, &res, 0);
3050 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3051 struct nfs_pathconf *pathconf)
3053 struct nfs4_exception exception = { };
3057 err = nfs4_handle_exception(server,
3058 _nfs4_proc_pathconf(server, fhandle, pathconf),
3060 } while (exception.retry);
3064 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3066 struct nfs_server *server = NFS_SERVER(data->inode);
3068 dprintk("--> %s\n", __func__);
3070 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
3072 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3073 nfs_restart_rpc(task, server->nfs_client);
3077 nfs_invalidate_atime(data->inode);
3078 if (task->tk_status > 0)
3079 renew_lease(server, data->timestamp);
3083 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3085 data->timestamp = jiffies;
3086 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3089 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3091 struct inode *inode = data->inode;
3093 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3096 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3097 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3100 if (task->tk_status >= 0) {
3101 renew_lease(NFS_SERVER(inode), data->timestamp);
3102 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3107 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3109 struct nfs_server *server = NFS_SERVER(data->inode);
3111 data->args.bitmask = server->cache_consistency_bitmask;
3112 data->res.server = server;
3113 data->timestamp = jiffies;
3115 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3118 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3120 struct inode *inode = data->inode;
3122 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3124 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3125 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3128 nfs_refresh_inode(inode, data->res.fattr);
3132 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3134 struct nfs_server *server = NFS_SERVER(data->inode);
3136 data->args.bitmask = server->cache_consistency_bitmask;
3137 data->res.server = server;
3138 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3142 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3143 * standalone procedure for queueing an asynchronous RENEW.
3145 static void nfs4_renew_done(struct rpc_task *task, void *data)
3147 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
3148 unsigned long timestamp = (unsigned long)data;
3150 if (task->tk_status < 0) {
3151 /* Unless we're shutting down, schedule state recovery! */
3152 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3153 nfs4_schedule_state_recovery(clp);
3156 spin_lock(&clp->cl_lock);
3157 if (time_before(clp->cl_last_renewal,timestamp))
3158 clp->cl_last_renewal = timestamp;
3159 spin_unlock(&clp->cl_lock);
3162 static const struct rpc_call_ops nfs4_renew_ops = {
3163 .rpc_call_done = nfs4_renew_done,
3166 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3168 struct rpc_message msg = {
3169 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3174 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3175 &nfs4_renew_ops, (void *)jiffies);
3178 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3180 struct rpc_message msg = {
3181 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3185 unsigned long now = jiffies;
3188 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3191 spin_lock(&clp->cl_lock);
3192 if (time_before(clp->cl_last_renewal,now))
3193 clp->cl_last_renewal = now;
3194 spin_unlock(&clp->cl_lock);
3198 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3200 return (server->caps & NFS_CAP_ACLS)
3201 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3202 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3205 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3206 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3209 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3211 static void buf_to_pages(const void *buf, size_t buflen,
3212 struct page **pages, unsigned int *pgbase)
3214 const void *p = buf;
3216 *pgbase = offset_in_page(buf);
3218 while (p < buf + buflen) {
3219 *(pages++) = virt_to_page(p);
3220 p += PAGE_CACHE_SIZE;
3224 struct nfs4_cached_acl {
3230 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3232 struct nfs_inode *nfsi = NFS_I(inode);
3234 spin_lock(&inode->i_lock);
3235 kfree(nfsi->nfs4_acl);
3236 nfsi->nfs4_acl = acl;
3237 spin_unlock(&inode->i_lock);
3240 static void nfs4_zap_acl_attr(struct inode *inode)
3242 nfs4_set_cached_acl(inode, NULL);
3245 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3247 struct nfs_inode *nfsi = NFS_I(inode);
3248 struct nfs4_cached_acl *acl;
3251 spin_lock(&inode->i_lock);
3252 acl = nfsi->nfs4_acl;
3255 if (buf == NULL) /* user is just asking for length */
3257 if (acl->cached == 0)
3259 ret = -ERANGE; /* see getxattr(2) man page */
3260 if (acl->len > buflen)
3262 memcpy(buf, acl->data, acl->len);
3266 spin_unlock(&inode->i_lock);
3270 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3272 struct nfs4_cached_acl *acl;
3274 if (buf && acl_len <= PAGE_SIZE) {
3275 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3279 memcpy(acl->data, buf, acl_len);
3281 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3288 nfs4_set_cached_acl(inode, acl);
3291 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3293 struct page *pages[NFS4ACL_MAXPAGES];
3294 struct nfs_getaclargs args = {
3295 .fh = NFS_FH(inode),
3299 struct nfs_getaclres res = {
3303 struct rpc_message msg = {
3304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3308 struct page *localpage = NULL;
3311 if (buflen < PAGE_SIZE) {
3312 /* As long as we're doing a round trip to the server anyway,
3313 * let's be prepared for a page of acl data. */
3314 localpage = alloc_page(GFP_KERNEL);
3315 resp_buf = page_address(localpage);
3316 if (localpage == NULL)
3318 args.acl_pages[0] = localpage;
3319 args.acl_pgbase = 0;
3320 args.acl_len = PAGE_SIZE;
3323 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3325 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3328 if (res.acl_len > args.acl_len)
3329 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3331 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3334 if (res.acl_len > buflen)
3337 memcpy(buf, resp_buf, res.acl_len);
3342 __free_page(localpage);
3346 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3348 struct nfs4_exception exception = { };
3351 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3354 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3355 } while (exception.retry);
3359 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3361 struct nfs_server *server = NFS_SERVER(inode);
3364 if (!nfs4_server_supports_acls(server))
3366 ret = nfs_revalidate_inode(server, inode);
3369 ret = nfs4_read_cached_acl(inode, buf, buflen);
3372 return nfs4_get_acl_uncached(inode, buf, buflen);
3375 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3377 struct nfs_server *server = NFS_SERVER(inode);
3378 struct page *pages[NFS4ACL_MAXPAGES];
3379 struct nfs_setaclargs arg = {
3380 .fh = NFS_FH(inode),
3384 struct nfs_setaclres res;
3385 struct rpc_message msg = {
3386 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3392 if (!nfs4_server_supports_acls(server))
3394 nfs_inode_return_delegation(inode);
3395 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3396 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3397 nfs_access_zap_cache(inode);
3398 nfs_zap_acl_cache(inode);
3402 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3404 struct nfs4_exception exception = { };
3407 err = nfs4_handle_exception(NFS_SERVER(inode),
3408 __nfs4_proc_set_acl(inode, buf, buflen),
3410 } while (exception.retry);
3415 _nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
3417 if (!clp || task->tk_status >= 0)
3419 switch(task->tk_status) {
3420 case -NFS4ERR_ADMIN_REVOKED:
3421 case -NFS4ERR_BAD_STATEID:
3422 case -NFS4ERR_OPENMODE:
3425 nfs4_state_mark_reclaim_nograce(clp, state);
3426 case -NFS4ERR_STALE_CLIENTID:
3427 case -NFS4ERR_STALE_STATEID:
3428 case -NFS4ERR_EXPIRED:
3429 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3430 nfs4_schedule_state_recovery(clp);
3431 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3432 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3433 task->tk_status = 0;
3435 #if defined(CONFIG_NFS_V4_1)
3436 case -NFS4ERR_BADSESSION:
3437 case -NFS4ERR_BADSLOT:
3438 case -NFS4ERR_BAD_HIGH_SLOT:
3439 case -NFS4ERR_DEADSESSION:
3440 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3441 case -NFS4ERR_SEQ_FALSE_RETRY:
3442 case -NFS4ERR_SEQ_MISORDERED:
3443 dprintk("%s ERROR %d, Reset session\n", __func__,
3445 nfs4_schedule_state_recovery(clp);
3446 task->tk_status = 0;
3448 #endif /* CONFIG_NFS_V4_1 */
3449 case -NFS4ERR_DELAY:
3451 nfs_inc_server_stats(server, NFSIOS_DELAY);
3452 case -NFS4ERR_GRACE:
3453 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3454 task->tk_status = 0;
3456 case -NFS4ERR_OLD_STATEID:
3457 task->tk_status = 0;
3460 task->tk_status = nfs4_map_errors(task->tk_status);
3465 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3467 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3470 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
3472 nfs4_verifier sc_verifier;
3473 struct nfs4_setclientid setclientid = {
3474 .sc_verifier = &sc_verifier,
3477 struct rpc_message msg = {
3478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3479 .rpc_argp = &setclientid,
3487 p = (__be32*)sc_verifier.data;
3488 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3489 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3492 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3493 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3495 rpc_peeraddr2str(clp->cl_rpcclient,
3497 rpc_peeraddr2str(clp->cl_rpcclient,
3499 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3500 clp->cl_id_uniquifier);
3501 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3502 sizeof(setclientid.sc_netid),
3503 rpc_peeraddr2str(clp->cl_rpcclient,
3504 RPC_DISPLAY_NETID));
3505 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3506 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3507 clp->cl_ipaddr, port >> 8, port & 255);
3509 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3510 if (status != -NFS4ERR_CLID_INUSE)
3515 ssleep(clp->cl_lease_time + 1);
3517 if (++clp->cl_id_uniquifier == 0)
3523 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3525 struct nfs_fsinfo fsinfo;
3526 struct rpc_message msg = {
3527 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3529 .rpc_resp = &fsinfo,
3536 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3538 spin_lock(&clp->cl_lock);
3539 clp->cl_lease_time = fsinfo.lease_time * HZ;
3540 clp->cl_last_renewal = now;
3541 spin_unlock(&clp->cl_lock);
3546 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3551 err = _nfs4_proc_setclientid_confirm(clp, cred);
3555 case -NFS4ERR_RESOURCE:
3556 /* The IBM lawyers misread another document! */
3557 case -NFS4ERR_DELAY:
3558 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3564 struct nfs4_delegreturndata {
3565 struct nfs4_delegreturnargs args;
3566 struct nfs4_delegreturnres res;
3568 nfs4_stateid stateid;
3569 unsigned long timestamp;
3570 struct nfs_fattr fattr;
3574 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3576 struct nfs4_delegreturndata *data = calldata;
3578 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3581 switch (task->tk_status) {
3582 case -NFS4ERR_STALE_STATEID:
3583 case -NFS4ERR_EXPIRED:
3585 renew_lease(data->res.server, data->timestamp);
3588 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3590 nfs_restart_rpc(task, data->res.server->nfs_client);
3594 data->rpc_status = task->tk_status;
3597 static void nfs4_delegreturn_release(void *calldata)
3602 #if defined(CONFIG_NFS_V4_1)
3603 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3605 struct nfs4_delegreturndata *d_data;
3607 d_data = (struct nfs4_delegreturndata *)data;
3609 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3610 &d_data->args.seq_args,
3611 &d_data->res.seq_res, 1, task))
3613 rpc_call_start(task);
3615 #endif /* CONFIG_NFS_V4_1 */
3617 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3618 #if defined(CONFIG_NFS_V4_1)
3619 .rpc_call_prepare = nfs4_delegreturn_prepare,
3620 #endif /* CONFIG_NFS_V4_1 */
3621 .rpc_call_done = nfs4_delegreturn_done,
3622 .rpc_release = nfs4_delegreturn_release,
3625 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3627 struct nfs4_delegreturndata *data;
3628 struct nfs_server *server = NFS_SERVER(inode);
3629 struct rpc_task *task;
3630 struct rpc_message msg = {
3631 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3634 struct rpc_task_setup task_setup_data = {
3635 .rpc_client = server->client,
3636 .rpc_message = &msg,
3637 .callback_ops = &nfs4_delegreturn_ops,
3638 .flags = RPC_TASK_ASYNC,
3642 data = kzalloc(sizeof(*data), GFP_KERNEL);
3645 data->args.fhandle = &data->fh;
3646 data->args.stateid = &data->stateid;
3647 data->args.bitmask = server->attr_bitmask;
3648 nfs_copy_fh(&data->fh, NFS_FH(inode));
3649 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3650 data->res.fattr = &data->fattr;
3651 data->res.server = server;
3652 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3653 nfs_fattr_init(data->res.fattr);
3654 data->timestamp = jiffies;
3655 data->rpc_status = 0;
3657 task_setup_data.callback_data = data;
3658 msg.rpc_argp = &data->args,
3659 msg.rpc_resp = &data->res,
3660 task = rpc_run_task(&task_setup_data);
3662 return PTR_ERR(task);
3665 status = nfs4_wait_for_completion_rpc_task(task);
3668 status = data->rpc_status;
3671 nfs_refresh_inode(inode, &data->fattr);
3677 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3679 struct nfs_server *server = NFS_SERVER(inode);
3680 struct nfs4_exception exception = { };
3683 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3685 case -NFS4ERR_STALE_STATEID:
3686 case -NFS4ERR_EXPIRED:
3690 err = nfs4_handle_exception(server, err, &exception);
3691 } while (exception.retry);
3695 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3696 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3699 * sleep, with exponential backoff, and retry the LOCK operation.
3701 static unsigned long
3702 nfs4_set_lock_task_retry(unsigned long timeout)
3704 schedule_timeout_killable(timeout);
3706 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3707 return NFS4_LOCK_MAXTIMEOUT;
3711 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3713 struct inode *inode = state->inode;
3714 struct nfs_server *server = NFS_SERVER(inode);
3715 struct nfs_client *clp = server->nfs_client;
3716 struct nfs_lockt_args arg = {
3717 .fh = NFS_FH(inode),
3720 struct nfs_lockt_res res = {
3723 struct rpc_message msg = {
3724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3727 .rpc_cred = state->owner->so_cred,
3729 struct nfs4_lock_state *lsp;
3732 arg.lock_owner.clientid = clp->cl_clientid;
3733 status = nfs4_set_lock_state(state, request);
3736 lsp = request->fl_u.nfs4_fl.owner;
3737 arg.lock_owner.id = lsp->ls_id.id;
3738 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3741 request->fl_type = F_UNLCK;
3743 case -NFS4ERR_DENIED:
3746 request->fl_ops->fl_release_private(request);
3751 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3753 struct nfs4_exception exception = { };
3757 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3758 _nfs4_proc_getlk(state, cmd, request),
3760 } while (exception.retry);
3764 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3767 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3769 res = posix_lock_file_wait(file, fl);
3772 res = flock_lock_file_wait(file, fl);
3780 struct nfs4_unlockdata {
3781 struct nfs_locku_args arg;
3782 struct nfs_locku_res res;
3783 struct nfs4_lock_state *lsp;
3784 struct nfs_open_context *ctx;
3785 struct file_lock fl;
3786 const struct nfs_server *server;
3787 unsigned long timestamp;
3790 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3791 struct nfs_open_context *ctx,
3792 struct nfs4_lock_state *lsp,
3793 struct nfs_seqid *seqid)
3795 struct nfs4_unlockdata *p;
3796 struct inode *inode = lsp->ls_state->inode;
3798 p = kzalloc(sizeof(*p), GFP_KERNEL);
3801 p->arg.fh = NFS_FH(inode);
3803 p->arg.seqid = seqid;
3804 p->res.seqid = seqid;
3805 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3806 p->arg.stateid = &lsp->ls_stateid;
3808 atomic_inc(&lsp->ls_count);
3809 /* Ensure we don't close file until we're done freeing locks! */
3810 p->ctx = get_nfs_open_context(ctx);
3811 memcpy(&p->fl, fl, sizeof(p->fl));
3812 p->server = NFS_SERVER(inode);
3816 static void nfs4_locku_release_calldata(void *data)
3818 struct nfs4_unlockdata *calldata = data;
3819 nfs_free_seqid(calldata->arg.seqid);
3820 nfs4_put_lock_state(calldata->lsp);
3821 put_nfs_open_context(calldata->ctx);
3825 static void nfs4_locku_done(struct rpc_task *task, void *data)
3827 struct nfs4_unlockdata *calldata = data;
3829 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3831 if (RPC_ASSASSINATED(task))
3833 switch (task->tk_status) {
3835 memcpy(calldata->lsp->ls_stateid.data,
3836 calldata->res.stateid.data,
3837 sizeof(calldata->lsp->ls_stateid.data));
3838 renew_lease(calldata->server, calldata->timestamp);
3840 case -NFS4ERR_BAD_STATEID:
3841 case -NFS4ERR_OLD_STATEID:
3842 case -NFS4ERR_STALE_STATEID:
3843 case -NFS4ERR_EXPIRED:
3846 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3847 nfs_restart_rpc(task,
3848 calldata->server->nfs_client);
3852 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3854 struct nfs4_unlockdata *calldata = data;
3856 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3858 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3859 /* Note: exit _without_ running nfs4_locku_done */
3860 task->tk_action = NULL;
3863 calldata->timestamp = jiffies;
3864 if (nfs4_setup_sequence(calldata->server->nfs_client,
3865 &calldata->arg.seq_args,
3866 &calldata->res.seq_res, 1, task))
3868 rpc_call_start(task);
3871 static const struct rpc_call_ops nfs4_locku_ops = {
3872 .rpc_call_prepare = nfs4_locku_prepare,
3873 .rpc_call_done = nfs4_locku_done,
3874 .rpc_release = nfs4_locku_release_calldata,
3877 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3878 struct nfs_open_context *ctx,
3879 struct nfs4_lock_state *lsp,
3880 struct nfs_seqid *seqid)
3882 struct nfs4_unlockdata *data;
3883 struct rpc_message msg = {
3884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3885 .rpc_cred = ctx->cred,
3887 struct rpc_task_setup task_setup_data = {
3888 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3889 .rpc_message = &msg,
3890 .callback_ops = &nfs4_locku_ops,
3891 .workqueue = nfsiod_workqueue,
3892 .flags = RPC_TASK_ASYNC,
3895 /* Ensure this is an unlock - when canceling a lock, the
3896 * canceled lock is passed in, and it won't be an unlock.
3898 fl->fl_type = F_UNLCK;
3900 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3902 nfs_free_seqid(seqid);
3903 return ERR_PTR(-ENOMEM);
3906 msg.rpc_argp = &data->arg,
3907 msg.rpc_resp = &data->res,
3908 task_setup_data.callback_data = data;
3909 return rpc_run_task(&task_setup_data);
3912 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3914 struct nfs_inode *nfsi = NFS_I(state->inode);
3915 struct nfs_seqid *seqid;
3916 struct nfs4_lock_state *lsp;
3917 struct rpc_task *task;
3919 unsigned char fl_flags = request->fl_flags;
3921 status = nfs4_set_lock_state(state, request);
3922 /* Unlock _before_ we do the RPC call */
3923 request->fl_flags |= FL_EXISTS;
3924 down_read(&nfsi->rwsem);
3925 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3926 up_read(&nfsi->rwsem);
3929 up_read(&nfsi->rwsem);
3932 /* Is this a delegated lock? */
3933 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3935 lsp = request->fl_u.nfs4_fl.owner;
3936 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3940 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3941 status = PTR_ERR(task);
3944 status = nfs4_wait_for_completion_rpc_task(task);
3947 request->fl_flags = fl_flags;
3951 struct nfs4_lockdata {
3952 struct nfs_lock_args arg;
3953 struct nfs_lock_res res;
3954 struct nfs4_lock_state *lsp;
3955 struct nfs_open_context *ctx;
3956 struct file_lock fl;
3957 unsigned long timestamp;
3960 struct nfs_server *server;
3963 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3964 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3966 struct nfs4_lockdata *p;
3967 struct inode *inode = lsp->ls_state->inode;
3968 struct nfs_server *server = NFS_SERVER(inode);
3970 p = kzalloc(sizeof(*p), GFP_KERNEL);
3974 p->arg.fh = NFS_FH(inode);
3976 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3977 if (p->arg.open_seqid == NULL)
3979 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3980 if (p->arg.lock_seqid == NULL)
3981 goto out_free_seqid;
3982 p->arg.lock_stateid = &lsp->ls_stateid;
3983 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3984 p->arg.lock_owner.id = lsp->ls_id.id;
3985 p->res.lock_seqid = p->arg.lock_seqid;
3986 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3989 atomic_inc(&lsp->ls_count);
3990 p->ctx = get_nfs_open_context(ctx);
3991 memcpy(&p->fl, fl, sizeof(p->fl));
3994 nfs_free_seqid(p->arg.open_seqid);
4000 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4002 struct nfs4_lockdata *data = calldata;
4003 struct nfs4_state *state = data->lsp->ls_state;
4005 dprintk("%s: begin!\n", __func__);
4006 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4008 /* Do we need to do an open_to_lock_owner? */
4009 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4010 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4012 data->arg.open_stateid = &state->stateid;
4013 data->arg.new_lock_owner = 1;
4014 data->res.open_seqid = data->arg.open_seqid;
4016 data->arg.new_lock_owner = 0;
4017 data->timestamp = jiffies;
4018 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
4019 &data->res.seq_res, 1, task))
4021 rpc_call_start(task);
4022 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4025 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4027 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4028 nfs4_lock_prepare(task, calldata);
4031 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4033 struct nfs4_lockdata *data = calldata;
4035 dprintk("%s: begin!\n", __func__);
4037 nfs4_sequence_done(data->server, &data->res.seq_res,
4040 data->rpc_status = task->tk_status;
4041 if (RPC_ASSASSINATED(task))
4043 if (data->arg.new_lock_owner != 0) {
4044 if (data->rpc_status == 0)
4045 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4049 if (data->rpc_status == 0) {
4050 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4051 sizeof(data->lsp->ls_stateid.data));
4052 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4053 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
4056 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4059 static void nfs4_lock_release(void *calldata)
4061 struct nfs4_lockdata *data = calldata;
4063 dprintk("%s: begin!\n", __func__);
4064 nfs_free_seqid(data->arg.open_seqid);
4065 if (data->cancelled != 0) {
4066 struct rpc_task *task;
4067 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4068 data->arg.lock_seqid);
4071 dprintk("%s: cancelling lock!\n", __func__);
4073 nfs_free_seqid(data->arg.lock_seqid);
4074 nfs4_put_lock_state(data->lsp);
4075 put_nfs_open_context(data->ctx);
4077 dprintk("%s: done!\n", __func__);
4080 static const struct rpc_call_ops nfs4_lock_ops = {
4081 .rpc_call_prepare = nfs4_lock_prepare,
4082 .rpc_call_done = nfs4_lock_done,
4083 .rpc_release = nfs4_lock_release,
4086 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4087 .rpc_call_prepare = nfs4_recover_lock_prepare,
4088 .rpc_call_done = nfs4_lock_done,
4089 .rpc_release = nfs4_lock_release,
4092 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4094 struct nfs4_lockdata *data;
4095 struct rpc_task *task;
4096 struct rpc_message msg = {
4097 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4098 .rpc_cred = state->owner->so_cred,
4100 struct rpc_task_setup task_setup_data = {
4101 .rpc_client = NFS_CLIENT(state->inode),
4102 .rpc_message = &msg,
4103 .callback_ops = &nfs4_lock_ops,
4104 .workqueue = nfsiod_workqueue,
4105 .flags = RPC_TASK_ASYNC,
4109 dprintk("%s: begin!\n", __func__);
4110 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4111 fl->fl_u.nfs4_fl.owner);
4115 data->arg.block = 1;
4116 if (recovery_type > NFS_LOCK_NEW) {
4117 if (recovery_type == NFS_LOCK_RECLAIM)
4118 data->arg.reclaim = NFS_LOCK_RECLAIM;
4119 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4121 msg.rpc_argp = &data->arg,
4122 msg.rpc_resp = &data->res,
4123 task_setup_data.callback_data = data;
4124 task = rpc_run_task(&task_setup_data);
4126 return PTR_ERR(task);
4127 ret = nfs4_wait_for_completion_rpc_task(task);
4129 ret = data->rpc_status;
4131 data->cancelled = 1;
4133 dprintk("%s: done, ret = %d!\n", __func__, ret);
4137 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4139 struct nfs_server *server = NFS_SERVER(state->inode);
4140 struct nfs4_exception exception = { };
4144 /* Cache the lock if possible... */
4145 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4147 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4148 if (err != -NFS4ERR_DELAY)
4150 nfs4_handle_exception(server, err, &exception);
4151 } while (exception.retry);
4155 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4157 struct nfs_server *server = NFS_SERVER(state->inode);
4158 struct nfs4_exception exception = { };
4161 err = nfs4_set_lock_state(state, request);
4165 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4167 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4171 case -NFS4ERR_GRACE:
4172 case -NFS4ERR_DELAY:
4173 nfs4_handle_exception(server, err, &exception);
4176 } while (exception.retry);
4181 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4183 struct nfs_inode *nfsi = NFS_I(state->inode);
4184 unsigned char fl_flags = request->fl_flags;
4187 /* Is this a delegated open? */
4188 status = nfs4_set_lock_state(state, request);
4191 request->fl_flags |= FL_ACCESS;
4192 status = do_vfs_lock(request->fl_file, request);
4195 down_read(&nfsi->rwsem);
4196 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4197 /* Yes: cache locks! */
4198 /* ...but avoid races with delegation recall... */
4199 request->fl_flags = fl_flags & ~FL_SLEEP;
4200 status = do_vfs_lock(request->fl_file, request);
4203 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4206 /* Note: we always want to sleep here! */
4207 request->fl_flags = fl_flags | FL_SLEEP;
4208 if (do_vfs_lock(request->fl_file, request) < 0)
4209 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4211 up_read(&nfsi->rwsem);
4213 request->fl_flags = fl_flags;
4217 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4219 struct nfs4_exception exception = { };
4223 err = _nfs4_proc_setlk(state, cmd, request);
4224 if (err == -NFS4ERR_DENIED)
4226 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4228 } while (exception.retry);
4233 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4235 struct nfs_open_context *ctx;
4236 struct nfs4_state *state;
4237 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4240 /* verify open state */
4241 ctx = nfs_file_open_context(filp);
4244 if (request->fl_start < 0 || request->fl_end < 0)
4247 if (IS_GETLK(cmd)) {
4249 return nfs4_proc_getlk(state, F_GETLK, request);
4253 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4256 if (request->fl_type == F_UNLCK) {
4258 return nfs4_proc_unlck(state, cmd, request);
4265 status = nfs4_proc_setlk(state, cmd, request);
4266 if ((status != -EAGAIN) || IS_SETLK(cmd))
4268 timeout = nfs4_set_lock_task_retry(timeout);
4269 status = -ERESTARTSYS;
4272 } while(status < 0);
4276 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4278 struct nfs_server *server = NFS_SERVER(state->inode);
4279 struct nfs4_exception exception = { };
4282 err = nfs4_set_lock_state(state, fl);
4286 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4289 printk(KERN_ERR "%s: unhandled error %d.\n",
4294 case -NFS4ERR_EXPIRED:
4295 case -NFS4ERR_STALE_CLIENTID:
4296 case -NFS4ERR_STALE_STATEID:
4297 case -NFS4ERR_BADSESSION:
4298 case -NFS4ERR_BADSLOT:
4299 case -NFS4ERR_BAD_HIGH_SLOT:
4300 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4301 case -NFS4ERR_DEADSESSION:
4302 nfs4_schedule_state_recovery(server->nfs_client);
4306 * The show must go on: exit, but mark the
4307 * stateid as needing recovery.
4309 case -NFS4ERR_ADMIN_REVOKED:
4310 case -NFS4ERR_BAD_STATEID:
4311 case -NFS4ERR_OPENMODE:
4312 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4316 case -NFS4ERR_DENIED:
4317 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4320 case -NFS4ERR_DELAY:
4323 err = nfs4_handle_exception(server, err, &exception);
4324 } while (exception.retry);
4329 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4331 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4332 size_t buflen, int flags)
4334 struct inode *inode = dentry->d_inode;
4336 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4339 return nfs4_proc_set_acl(inode, buf, buflen);
4342 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4343 * and that's what we'll do for e.g. user attributes that haven't been set.
4344 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4345 * attributes in kernel-managed attribute namespaces. */
4346 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4349 struct inode *inode = dentry->d_inode;
4351 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4354 return nfs4_proc_get_acl(inode, buf, buflen);
4357 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4359 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
4361 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4363 if (buf && buflen < len)
4366 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4370 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4372 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4373 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4374 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4377 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4378 NFS_ATTR_FATTR_NLINK;
4379 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4383 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4384 struct nfs4_fs_locations *fs_locations, struct page *page)
4386 struct nfs_server *server = NFS_SERVER(dir);
4388 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4389 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4391 struct nfs4_fs_locations_arg args = {
4392 .dir_fh = NFS_FH(dir),
4397 struct nfs4_fs_locations_res res = {
4398 .fs_locations = fs_locations,
4400 struct rpc_message msg = {
4401 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4407 dprintk("%s: start\n", __func__);
4408 nfs_fattr_init(&fs_locations->fattr);
4409 fs_locations->server = server;
4410 fs_locations->nlocations = 0;
4411 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4412 nfs_fixup_referral_attributes(&fs_locations->fattr);
4413 dprintk("%s: returned status = %d\n", __func__, status);
4417 #ifdef CONFIG_NFS_V4_1
4419 * nfs4_proc_exchange_id()
4421 * Since the clientid has expired, all compounds using sessions
4422 * associated with the stale clientid will be returning
4423 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4424 * be in some phase of session reset.
4426 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4428 nfs4_verifier verifier;
4429 struct nfs41_exchange_id_args args = {
4431 .flags = clp->cl_exchange_flags,
4433 struct nfs41_exchange_id_res res = {
4437 struct rpc_message msg = {
4438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4445 dprintk("--> %s\n", __func__);
4446 BUG_ON(clp == NULL);
4448 /* Remove server-only flags */
4449 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4451 p = (u32 *)verifier.data;
4452 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4453 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4454 args.verifier = &verifier;
4457 args.id_len = scnprintf(args.id, sizeof(args.id),
4460 rpc_peeraddr2str(clp->cl_rpcclient,
4462 clp->cl_id_uniquifier);
4464 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4466 if (status != NFS4ERR_CLID_INUSE)
4472 if (++clp->cl_id_uniquifier == 0)
4476 dprintk("<-- %s status= %d\n", __func__, status);
4480 struct nfs4_get_lease_time_data {
4481 struct nfs4_get_lease_time_args *args;
4482 struct nfs4_get_lease_time_res *res;
4483 struct nfs_client *clp;
4486 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4490 struct nfs4_get_lease_time_data *data =
4491 (struct nfs4_get_lease_time_data *)calldata;
4493 dprintk("--> %s\n", __func__);
4494 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4495 /* just setup sequence, do not trigger session recovery
4496 since we're invoked within one */
4497 ret = nfs41_setup_sequence(data->clp->cl_session,
4498 &data->args->la_seq_args,
4499 &data->res->lr_seq_res, 0, task);
4501 BUG_ON(ret == -EAGAIN);
4502 rpc_call_start(task);
4503 dprintk("<-- %s\n", __func__);
4507 * Called from nfs4_state_manager thread for session setup, so don't recover
4508 * from sequence operation or clientid errors.
4510 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4512 struct nfs4_get_lease_time_data *data =
4513 (struct nfs4_get_lease_time_data *)calldata;
4515 dprintk("--> %s\n", __func__);
4516 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4517 switch (task->tk_status) {
4518 case -NFS4ERR_DELAY:
4519 case -NFS4ERR_GRACE:
4520 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4521 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4522 task->tk_status = 0;
4523 nfs_restart_rpc(task, data->clp);
4526 dprintk("<-- %s\n", __func__);
4529 struct rpc_call_ops nfs4_get_lease_time_ops = {
4530 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4531 .rpc_call_done = nfs4_get_lease_time_done,
4534 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4536 struct rpc_task *task;
4537 struct nfs4_get_lease_time_args args;
4538 struct nfs4_get_lease_time_res res = {
4539 .lr_fsinfo = fsinfo,
4541 struct nfs4_get_lease_time_data data = {
4546 struct rpc_message msg = {
4547 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4551 struct rpc_task_setup task_setup = {
4552 .rpc_client = clp->cl_rpcclient,
4553 .rpc_message = &msg,
4554 .callback_ops = &nfs4_get_lease_time_ops,
4555 .callback_data = &data
4559 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4560 dprintk("--> %s\n", __func__);
4561 task = rpc_run_task(&task_setup);
4564 status = PTR_ERR(task);
4566 status = task->tk_status;
4569 dprintk("<-- %s return %d\n", __func__, status);
4575 * Reset a slot table
4577 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4578 int old_max_slots, int ivalue)
4583 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
4586 * Until we have dynamic slot table adjustment, insist
4587 * upon the same slot table size
4589 if (max_slots != old_max_slots) {
4590 dprintk("%s reset slot table does't match old\n",
4592 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4595 spin_lock(&tbl->slot_tbl_lock);
4596 for (i = 0; i < max_slots; ++i)
4597 tbl->slots[i].seq_nr = ivalue;
4598 spin_unlock(&tbl->slot_tbl_lock);
4599 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4600 tbl, tbl->slots, tbl->max_slots);
4602 dprintk("<-- %s: return %d\n", __func__, ret);
4607 * Reset the forechannel and backchannel slot tables
4609 static int nfs4_reset_slot_tables(struct nfs4_session *session)
4613 status = nfs4_reset_slot_table(&session->fc_slot_table,
4614 session->fc_attrs.max_reqs,
4615 session->fc_slot_table.max_slots,
4620 status = nfs4_reset_slot_table(&session->bc_slot_table,
4621 session->bc_attrs.max_reqs,
4622 session->bc_slot_table.max_slots,
4627 /* Destroy the slot table */
4628 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4630 if (session->fc_slot_table.slots != NULL) {
4631 kfree(session->fc_slot_table.slots);
4632 session->fc_slot_table.slots = NULL;
4634 if (session->bc_slot_table.slots != NULL) {
4635 kfree(session->bc_slot_table.slots);
4636 session->bc_slot_table.slots = NULL;
4642 * Initialize slot table
4644 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4645 int max_slots, int ivalue)
4647 struct nfs4_slot *slot;
4650 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4652 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4654 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4659 spin_lock(&tbl->slot_tbl_lock);
4660 tbl->max_slots = max_slots;
4662 tbl->highest_used_slotid = -1; /* no slot is currently used */
4663 spin_unlock(&tbl->slot_tbl_lock);
4664 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4665 tbl, tbl->slots, tbl->max_slots);
4667 dprintk("<-- %s: return %d\n", __func__, ret);
4672 * Initialize the forechannel and backchannel tables
4674 static int nfs4_init_slot_tables(struct nfs4_session *session)
4676 struct nfs4_slot_table *tbl;
4679 tbl = &session->fc_slot_table;
4680 if (tbl->slots == NULL) {
4681 status = nfs4_init_slot_table(tbl,
4682 session->fc_attrs.max_reqs, 1);
4687 tbl = &session->bc_slot_table;
4688 if (tbl->slots == NULL) {
4689 status = nfs4_init_slot_table(tbl,
4690 session->bc_attrs.max_reqs, 0);
4692 nfs4_destroy_slot_tables(session);
4698 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4700 struct nfs4_session *session;
4701 struct nfs4_slot_table *tbl;
4703 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4708 * The create session reply races with the server back
4709 * channel probe. Mark the client NFS_CS_SESSION_INITING
4710 * so that the client back channel can find the
4713 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4714 init_completion(&session->complete);
4716 tbl = &session->fc_slot_table;
4717 tbl->highest_used_slotid = -1;
4718 spin_lock_init(&tbl->slot_tbl_lock);
4719 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4721 tbl = &session->bc_slot_table;
4722 tbl->highest_used_slotid = -1;
4723 spin_lock_init(&tbl->slot_tbl_lock);
4724 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4730 void nfs4_destroy_session(struct nfs4_session *session)
4732 nfs4_proc_destroy_session(session);
4733 dprintk("%s Destroy backchannel for xprt %p\n",
4734 __func__, session->clp->cl_rpcclient->cl_xprt);
4735 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4736 NFS41_BC_MIN_CALLBACKS);
4737 nfs4_destroy_slot_tables(session);
4742 * Initialize the values to be used by the client in CREATE_SESSION
4743 * If nfs4_init_session set the fore channel request and response sizes,
4746 * Set the back channel max_resp_sz_cached to zero to force the client to
4747 * always set csa_cachethis to FALSE because the current implementation
4748 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4750 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4752 struct nfs4_session *session = args->client->cl_session;
4753 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4754 mxresp_sz = session->fc_attrs.max_resp_sz;
4757 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4759 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4760 /* Fore channel attributes */
4761 args->fc_attrs.headerpadsz = 0;
4762 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4763 args->fc_attrs.max_resp_sz = mxresp_sz;
4764 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4765 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4766 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4768 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4769 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4771 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4772 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4773 args->fc_attrs.max_reqs);
4775 /* Back channel attributes */
4776 args->bc_attrs.headerpadsz = 0;
4777 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4778 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4779 args->bc_attrs.max_resp_sz_cached = 0;
4780 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4781 args->bc_attrs.max_reqs = 1;
4783 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4784 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4786 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4787 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4788 args->bc_attrs.max_reqs);
4791 static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4795 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4796 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4800 #define _verify_fore_channel_attr(_name_) \
4801 _verify_channel_attr("fore", #_name_, \
4802 args->fc_attrs._name_, \
4803 session->fc_attrs._name_)
4805 #define _verify_back_channel_attr(_name_) \
4806 _verify_channel_attr("back", #_name_, \
4807 args->bc_attrs._name_, \
4808 session->bc_attrs._name_)
4811 * The server is not allowed to increase the fore channel header pad size,
4812 * maximum response size, or maximum number of operations.
4814 * The back channel attributes are only negotiatied down: We send what the
4815 * (back channel) server insists upon.
4817 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4818 struct nfs4_session *session)
4822 ret |= _verify_fore_channel_attr(headerpadsz);
4823 ret |= _verify_fore_channel_attr(max_resp_sz);
4824 ret |= _verify_fore_channel_attr(max_ops);
4826 ret |= _verify_back_channel_attr(headerpadsz);
4827 ret |= _verify_back_channel_attr(max_rqst_sz);
4828 ret |= _verify_back_channel_attr(max_resp_sz);
4829 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4830 ret |= _verify_back_channel_attr(max_ops);
4831 ret |= _verify_back_channel_attr(max_reqs);
4836 static int _nfs4_proc_create_session(struct nfs_client *clp)
4838 struct nfs4_session *session = clp->cl_session;
4839 struct nfs41_create_session_args args = {
4841 .cb_program = NFS4_CALLBACK,
4843 struct nfs41_create_session_res res = {
4846 struct rpc_message msg = {
4847 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4853 nfs4_init_channel_attrs(&args);
4854 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
4856 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4859 /* Verify the session's negotiated channel_attrs values */
4860 status = nfs4_verify_channel_attrs(&args, session);
4862 /* Increment the clientid slot sequence id */
4870 * Issues a CREATE_SESSION operation to the server.
4871 * It is the responsibility of the caller to verify the session is
4872 * expired before calling this routine.
4874 int nfs4_proc_create_session(struct nfs_client *clp)
4878 struct nfs4_session *session = clp->cl_session;
4880 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4882 status = _nfs4_proc_create_session(clp);
4886 /* Init and reset the fore channel */
4887 status = nfs4_init_slot_tables(session);
4888 dprintk("slot table initialization returned %d\n", status);
4891 status = nfs4_reset_slot_tables(session);
4892 dprintk("slot table reset returned %d\n", status);
4896 ptr = (unsigned *)&session->sess_id.data[0];
4897 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4898 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4900 dprintk("<-- %s\n", __func__);
4905 * Issue the over-the-wire RPC DESTROY_SESSION.
4906 * The caller must serialize access to this routine.
4908 int nfs4_proc_destroy_session(struct nfs4_session *session)
4911 struct rpc_message msg;
4913 dprintk("--> nfs4_proc_destroy_session\n");
4915 /* session is still being setup */
4916 if (session->clp->cl_cons_state != NFS_CS_READY)
4919 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4920 msg.rpc_argp = session;
4921 msg.rpc_resp = NULL;
4922 msg.rpc_cred = NULL;
4923 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4927 "Got error %d from the server on DESTROY_SESSION. "
4928 "Session has been destroyed regardless...\n", status);
4930 dprintk("<-- nfs4_proc_destroy_session\n");
4934 int nfs4_init_session(struct nfs_server *server)
4936 struct nfs_client *clp = server->nfs_client;
4937 struct nfs4_session *session;
4938 unsigned int rsize, wsize;
4941 if (!nfs4_has_session(clp))
4944 rsize = server->rsize;
4946 rsize = NFS_MAX_FILE_IO_SIZE;
4947 wsize = server->wsize;
4949 wsize = NFS_MAX_FILE_IO_SIZE;
4951 session = clp->cl_session;
4952 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
4953 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
4955 ret = nfs4_recover_expired_lease(server);
4957 ret = nfs4_check_client_ready(clp);
4962 * Renew the cl_session lease.
4964 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4966 struct nfs4_sequence_args args;
4967 struct nfs4_sequence_res res;
4969 struct rpc_message msg = {
4970 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4976 args.sa_cache_this = 0;
4978 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4979 &res, args.sa_cache_this, 1);
4982 void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4984 struct nfs_client *clp = (struct nfs_client *)data;
4986 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4988 if (task->tk_status < 0) {
4989 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4991 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4993 nfs_restart_rpc(task, clp);
4997 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4999 kfree(task->tk_msg.rpc_argp);
5000 kfree(task->tk_msg.rpc_resp);
5002 dprintk("<-- %s\n", __func__);
5005 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5007 struct nfs_client *clp;
5008 struct nfs4_sequence_args *args;
5009 struct nfs4_sequence_res *res;
5011 clp = (struct nfs_client *)data;
5012 args = task->tk_msg.rpc_argp;
5013 res = task->tk_msg.rpc_resp;
5015 if (nfs4_setup_sequence(clp, args, res, 0, task))
5017 rpc_call_start(task);
5020 static const struct rpc_call_ops nfs41_sequence_ops = {
5021 .rpc_call_done = nfs41_sequence_call_done,
5022 .rpc_call_prepare = nfs41_sequence_prepare,
5025 static int nfs41_proc_async_sequence(struct nfs_client *clp,
5026 struct rpc_cred *cred)
5028 struct nfs4_sequence_args *args;
5029 struct nfs4_sequence_res *res;
5030 struct rpc_message msg = {
5031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5035 args = kzalloc(sizeof(*args), GFP_KERNEL);
5038 res = kzalloc(sizeof(*res), GFP_KERNEL);
5043 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
5044 msg.rpc_argp = args;
5047 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
5048 &nfs41_sequence_ops, (void *)clp);
5051 struct nfs4_reclaim_complete_data {
5052 struct nfs_client *clp;
5053 struct nfs41_reclaim_complete_args arg;
5054 struct nfs41_reclaim_complete_res res;
5057 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5059 struct nfs4_reclaim_complete_data *calldata = data;
5061 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5062 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
5063 &calldata->res.seq_res, 0, task))
5066 rpc_call_start(task);
5069 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5071 struct nfs4_reclaim_complete_data *calldata = data;
5072 struct nfs_client *clp = calldata->clp;
5073 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5075 dprintk("--> %s\n", __func__);
5076 nfs41_sequence_done(clp, res, task->tk_status);
5077 switch (task->tk_status) {
5079 case -NFS4ERR_COMPLETE_ALREADY:
5081 case -NFS4ERR_BADSESSION:
5082 case -NFS4ERR_DEADSESSION:
5084 * Handle the session error, but do not retry the operation, as
5085 * we have no way of telling whether the clientid had to be
5086 * reset before we got our reply. If reset, a new wave of
5087 * reclaim operations will follow, containing their own reclaim
5088 * complete. We don't want our retry to get on the way of
5089 * recovery by incorrectly indicating to the server that we're
5090 * done reclaiming state since the process had to be restarted.
5092 _nfs4_async_handle_error(task, NULL, clp, NULL);
5095 if (_nfs4_async_handle_error(
5096 task, NULL, clp, NULL) == -EAGAIN) {
5097 rpc_restart_call_prepare(task);
5102 dprintk("<-- %s\n", __func__);
5105 static void nfs4_free_reclaim_complete_data(void *data)
5107 struct nfs4_reclaim_complete_data *calldata = data;
5112 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5113 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5114 .rpc_call_done = nfs4_reclaim_complete_done,
5115 .rpc_release = nfs4_free_reclaim_complete_data,
5119 * Issue a global reclaim complete.
5121 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5123 struct nfs4_reclaim_complete_data *calldata;
5124 struct rpc_task *task;
5125 struct rpc_message msg = {
5126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5128 struct rpc_task_setup task_setup_data = {
5129 .rpc_client = clp->cl_rpcclient,
5130 .rpc_message = &msg,
5131 .callback_ops = &nfs4_reclaim_complete_call_ops,
5132 .flags = RPC_TASK_ASYNC,
5134 int status = -ENOMEM;
5136 dprintk("--> %s\n", __func__);
5137 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
5138 if (calldata == NULL)
5140 calldata->clp = clp;
5141 calldata->arg.one_fs = 0;
5142 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5144 msg.rpc_argp = &calldata->arg;
5145 msg.rpc_resp = &calldata->res;
5146 task_setup_data.callback_data = calldata;
5147 task = rpc_run_task(&task_setup_data);
5149 status = PTR_ERR(task);
5152 dprintk("<-- %s status=%d\n", __func__, status);
5155 #endif /* CONFIG_NFS_V4_1 */
5157 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
5158 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5159 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5160 .recover_open = nfs4_open_reclaim,
5161 .recover_lock = nfs4_lock_reclaim,
5162 .establish_clid = nfs4_init_clientid,
5163 .get_clid_cred = nfs4_get_setclientid_cred,
5166 #if defined(CONFIG_NFS_V4_1)
5167 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5168 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5169 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5170 .recover_open = nfs4_open_reclaim,
5171 .recover_lock = nfs4_lock_reclaim,
5172 .establish_clid = nfs41_init_clientid,
5173 .get_clid_cred = nfs4_get_exchange_id_cred,
5174 .reclaim_complete = nfs41_proc_reclaim_complete,
5176 #endif /* CONFIG_NFS_V4_1 */
5178 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5179 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5180 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5181 .recover_open = nfs4_open_expired,
5182 .recover_lock = nfs4_lock_expired,
5183 .establish_clid = nfs4_init_clientid,
5184 .get_clid_cred = nfs4_get_setclientid_cred,
5187 #if defined(CONFIG_NFS_V4_1)
5188 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
5189 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5190 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5191 .recover_open = nfs4_open_expired,
5192 .recover_lock = nfs4_lock_expired,
5193 .establish_clid = nfs41_init_clientid,
5194 .get_clid_cred = nfs4_get_exchange_id_cred,
5196 #endif /* CONFIG_NFS_V4_1 */
5198 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5199 .sched_state_renewal = nfs4_proc_async_renew,
5200 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
5201 .renew_lease = nfs4_proc_renew,
5204 #if defined(CONFIG_NFS_V4_1)
5205 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5206 .sched_state_renewal = nfs41_proc_async_sequence,
5207 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
5208 .renew_lease = nfs4_proc_sequence,
5213 * Per minor version reboot and network partition recovery ops
5216 struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5217 &nfs40_reboot_recovery_ops,
5218 #if defined(CONFIG_NFS_V4_1)
5219 &nfs41_reboot_recovery_ops,
5223 struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5224 &nfs40_nograce_recovery_ops,
5225 #if defined(CONFIG_NFS_V4_1)
5226 &nfs41_nograce_recovery_ops,
5230 struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5231 &nfs40_state_renewal_ops,
5232 #if defined(CONFIG_NFS_V4_1)
5233 &nfs41_state_renewal_ops,
5237 static const struct inode_operations nfs4_file_inode_operations = {
5238 .permission = nfs_permission,
5239 .getattr = nfs_getattr,
5240 .setattr = nfs_setattr,
5241 .getxattr = nfs4_getxattr,
5242 .setxattr = nfs4_setxattr,
5243 .listxattr = nfs4_listxattr,
5246 const struct nfs_rpc_ops nfs_v4_clientops = {
5247 .version = 4, /* protocol version */
5248 .dentry_ops = &nfs4_dentry_operations,
5249 .dir_inode_ops = &nfs4_dir_inode_operations,
5250 .file_inode_ops = &nfs4_file_inode_operations,
5251 .getroot = nfs4_proc_get_root,
5252 .getattr = nfs4_proc_getattr,
5253 .setattr = nfs4_proc_setattr,
5254 .lookupfh = nfs4_proc_lookupfh,
5255 .lookup = nfs4_proc_lookup,
5256 .access = nfs4_proc_access,
5257 .readlink = nfs4_proc_readlink,
5258 .create = nfs4_proc_create,
5259 .remove = nfs4_proc_remove,
5260 .unlink_setup = nfs4_proc_unlink_setup,
5261 .unlink_done = nfs4_proc_unlink_done,
5262 .rename = nfs4_proc_rename,
5263 .link = nfs4_proc_link,
5264 .symlink = nfs4_proc_symlink,
5265 .mkdir = nfs4_proc_mkdir,
5266 .rmdir = nfs4_proc_remove,
5267 .readdir = nfs4_proc_readdir,
5268 .mknod = nfs4_proc_mknod,
5269 .statfs = nfs4_proc_statfs,
5270 .fsinfo = nfs4_proc_fsinfo,
5271 .pathconf = nfs4_proc_pathconf,
5272 .set_capabilities = nfs4_server_capabilities,
5273 .decode_dirent = nfs4_decode_dirent,
5274 .read_setup = nfs4_proc_read_setup,
5275 .read_done = nfs4_read_done,
5276 .write_setup = nfs4_proc_write_setup,
5277 .write_done = nfs4_write_done,
5278 .commit_setup = nfs4_proc_commit_setup,
5279 .commit_done = nfs4_commit_done,
5280 .lock = nfs4_proc_lock,
5281 .clear_acl_cache = nfs4_zap_acl_attr,
5282 .close_context = nfs4_close_context,