4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/sunrpc/clnt.h>
43 #include <linux/nfs.h>
44 #include <linux/nfs4.h>
45 #include <linux/nfs_fs.h>
46 #include <linux/nfs_page.h>
47 #include <linux/namei.h>
48 #include <linux/mount.h>
49 #include <linux/module.h>
50 #include <linux/sunrpc/bc_xprt.h>
53 #include "delegation.h"
58 #define NFSDBG_FACILITY NFSDBG_PROC
60 #define NFS4_POLL_RETRY_MIN (HZ/10)
61 #define NFS4_POLL_RETRY_MAX (15*HZ)
63 #define NFS4_MAX_LOOP_ON_RECOVER (10)
66 static int _nfs4_proc_open(struct nfs4_opendata *data);
67 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
68 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
69 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
70 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
72 /* Prevent leaks of NFSv4 errors into userland */
73 static int nfs4_map_errors(int err)
78 case -NFS4ERR_RESOURCE:
81 dprintk("%s could not handle NFSv4 error %d\n",
89 * This is our standard bitmap for GETATTR requests.
91 const u32 nfs4_fattr_bitmap[2] = {
96 | FATTR4_WORD0_FILEID,
98 | FATTR4_WORD1_NUMLINKS
100 | FATTR4_WORD1_OWNER_GROUP
101 | FATTR4_WORD1_RAWDEV
102 | FATTR4_WORD1_SPACE_USED
103 | FATTR4_WORD1_TIME_ACCESS
104 | FATTR4_WORD1_TIME_METADATA
105 | FATTR4_WORD1_TIME_MODIFY
108 const u32 nfs4_statfs_bitmap[2] = {
109 FATTR4_WORD0_FILES_AVAIL
110 | FATTR4_WORD0_FILES_FREE
111 | FATTR4_WORD0_FILES_TOTAL,
112 FATTR4_WORD1_SPACE_AVAIL
113 | FATTR4_WORD1_SPACE_FREE
114 | FATTR4_WORD1_SPACE_TOTAL
117 const u32 nfs4_pathconf_bitmap[2] = {
119 | FATTR4_WORD0_MAXNAME,
123 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
124 | FATTR4_WORD0_MAXREAD
125 | FATTR4_WORD0_MAXWRITE
126 | FATTR4_WORD0_LEASE_TIME,
130 const u32 nfs4_fs_locations_bitmap[2] = {
132 | FATTR4_WORD0_CHANGE
135 | FATTR4_WORD0_FILEID
136 | FATTR4_WORD0_FS_LOCATIONS,
138 | FATTR4_WORD1_NUMLINKS
140 | FATTR4_WORD1_OWNER_GROUP
141 | FATTR4_WORD1_RAWDEV
142 | FATTR4_WORD1_SPACE_USED
143 | FATTR4_WORD1_TIME_ACCESS
144 | FATTR4_WORD1_TIME_METADATA
145 | FATTR4_WORD1_TIME_MODIFY
146 | FATTR4_WORD1_MOUNTED_ON_FILEID
149 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
150 struct nfs4_readdir_arg *readdir)
154 BUG_ON(readdir->count < 80);
156 readdir->cookie = cookie;
157 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
162 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
167 * NFSv4 servers do not return entries for '.' and '..'
168 * Therefore, we fake these entries here. We let '.'
169 * have cookie 0 and '..' have cookie 1. Note that
170 * when talking to the server, we always send cookie 0
173 start = p = kmap_atomic(*readdir->pages, KM_USER0);
176 *p++ = xdr_one; /* next */
177 *p++ = xdr_zero; /* cookie, first word */
178 *p++ = xdr_one; /* cookie, second word */
179 *p++ = xdr_one; /* entry len */
180 memcpy(p, ".\0\0\0", 4); /* entry */
182 *p++ = xdr_one; /* bitmap length */
183 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
184 *p++ = htonl(8); /* attribute buffer length */
185 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
188 *p++ = xdr_one; /* next */
189 *p++ = xdr_zero; /* cookie, first word */
190 *p++ = xdr_two; /* cookie, second word */
191 *p++ = xdr_two; /* entry len */
192 memcpy(p, "..\0\0", 4); /* entry */
194 *p++ = xdr_one; /* bitmap length */
195 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
196 *p++ = htonl(8); /* attribute buffer length */
197 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
199 readdir->pgbase = (char *)p - (char *)start;
200 readdir->count -= readdir->pgbase;
201 kunmap_atomic(start, KM_USER0);
204 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
210 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
211 nfs_wait_bit_killable, TASK_KILLABLE);
215 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
222 *timeout = NFS4_POLL_RETRY_MIN;
223 if (*timeout > NFS4_POLL_RETRY_MAX)
224 *timeout = NFS4_POLL_RETRY_MAX;
225 schedule_timeout_killable(*timeout);
226 if (fatal_signal_pending(current))
232 /* This is the error handling routine for processes that are allowed
235 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
237 struct nfs_client *clp = server->nfs_client;
238 struct nfs4_state *state = exception->state;
241 exception->retry = 0;
245 case -NFS4ERR_ADMIN_REVOKED:
246 case -NFS4ERR_BAD_STATEID:
247 case -NFS4ERR_OPENMODE:
250 nfs4_state_mark_reclaim_nograce(clp, state);
251 case -NFS4ERR_STALE_CLIENTID:
252 case -NFS4ERR_STALE_STATEID:
253 case -NFS4ERR_EXPIRED:
254 nfs4_schedule_state_recovery(clp);
255 ret = nfs4_wait_clnt_recover(clp);
257 exception->retry = 1;
258 #if !defined(CONFIG_NFS_V4_1)
260 #else /* !defined(CONFIG_NFS_V4_1) */
261 if (!nfs4_has_session(server->nfs_client))
264 case -NFS4ERR_BADSESSION:
265 case -NFS4ERR_BADSLOT:
266 case -NFS4ERR_BAD_HIGH_SLOT:
267 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
268 case -NFS4ERR_DEADSESSION:
269 case -NFS4ERR_SEQ_FALSE_RETRY:
270 case -NFS4ERR_SEQ_MISORDERED:
271 dprintk("%s ERROR: %d Reset session\n", __func__,
273 nfs4_schedule_state_recovery(clp);
274 exception->retry = 1;
276 #endif /* !defined(CONFIG_NFS_V4_1) */
277 case -NFS4ERR_FILE_OPEN:
278 if (exception->timeout > HZ) {
279 /* We have retried a decent amount, time to
287 ret = nfs4_delay(server->client, &exception->timeout);
290 case -NFS4ERR_OLD_STATEID:
291 exception->retry = 1;
293 /* We failed to handle the error */
294 return nfs4_map_errors(ret);
298 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
300 struct nfs_client *clp = server->nfs_client;
301 spin_lock(&clp->cl_lock);
302 if (time_before(clp->cl_last_renewal,timestamp))
303 clp->cl_last_renewal = timestamp;
304 spin_unlock(&clp->cl_lock);
307 #if defined(CONFIG_NFS_V4_1)
310 * nfs4_free_slot - free a slot and efficiently update slot table.
312 * freeing a slot is trivially done by clearing its respective bit
314 * If the freed slotid equals highest_used_slotid we want to update it
315 * so that the server would be able to size down the slot table if needed,
316 * otherwise we know that the highest_used_slotid is still in use.
317 * When updating highest_used_slotid there may be "holes" in the bitmap
318 * so we need to scan down from highest_used_slotid to 0 looking for the now
319 * highest slotid in use.
320 * If none found, highest_used_slotid is set to -1.
322 * Must be called while holding tbl->slot_tbl_lock
325 nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
327 int slotid = free_slotid;
329 /* clear used bit in bitmap */
330 __clear_bit(slotid, tbl->used_slots);
332 /* update highest_used_slotid when it is freed */
333 if (slotid == tbl->highest_used_slotid) {
334 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
335 if (slotid < tbl->max_slots)
336 tbl->highest_used_slotid = slotid;
338 tbl->highest_used_slotid = -1;
340 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
341 free_slotid, tbl->highest_used_slotid);
344 static void nfs41_sequence_free_slot(const struct nfs_client *clp,
345 struct nfs4_sequence_res *res)
347 struct nfs4_slot_table *tbl;
349 tbl = &clp->cl_session->fc_slot_table;
350 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
351 /* just wake up the next guy waiting since
352 * we may have not consumed a slot after all */
353 dprintk("%s: No slot\n", __func__);
357 spin_lock(&tbl->slot_tbl_lock);
358 nfs4_free_slot(tbl, res->sr_slotid);
360 /* Signal state manager thread if session is drained */
361 if (test_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state)) {
362 if (tbl->highest_used_slotid == -1) {
363 dprintk("%s COMPLETE: Session Drained\n", __func__);
364 complete(&clp->cl_session->complete);
367 rpc_wake_up_next(&tbl->slot_tbl_waitq);
368 spin_unlock(&tbl->slot_tbl_lock);
369 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
372 static void nfs41_sequence_done(struct nfs_client *clp,
373 struct nfs4_sequence_res *res,
376 unsigned long timestamp;
377 struct nfs4_slot_table *tbl;
378 struct nfs4_slot *slot;
381 * sr_status remains 1 if an RPC level error occurred. The server
382 * may or may not have processed the sequence operation..
383 * Proceed as if the server received and processed the sequence
386 if (res->sr_status == 1)
387 res->sr_status = NFS_OK;
389 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
390 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
393 /* Check the SEQUENCE operation status */
394 if (res->sr_status == 0) {
395 tbl = &clp->cl_session->fc_slot_table;
396 slot = tbl->slots + res->sr_slotid;
397 /* Update the slot's sequence and clientid lease timer */
399 timestamp = res->sr_renewal_time;
400 spin_lock(&clp->cl_lock);
401 if (time_before(clp->cl_last_renewal, timestamp))
402 clp->cl_last_renewal = timestamp;
403 spin_unlock(&clp->cl_lock);
404 /* Check sequence flags */
405 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
408 /* The session may be reset by one of the error handlers. */
409 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
410 nfs41_sequence_free_slot(clp, res);
414 * nfs4_find_slot - efficiently look for a free slot
416 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
417 * If found, we mark the slot as used, update the highest_used_slotid,
418 * and respectively set up the sequence operation args.
419 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
421 * Note: must be called with under the slot_tbl_lock.
424 nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
427 u8 ret_id = NFS4_MAX_SLOT_TABLE;
428 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
430 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
431 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
433 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
434 if (slotid >= tbl->max_slots)
436 __set_bit(slotid, tbl->used_slots);
437 if (slotid > tbl->highest_used_slotid)
438 tbl->highest_used_slotid = slotid;
441 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
442 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
446 static int nfs41_setup_sequence(struct nfs4_session *session,
447 struct nfs4_sequence_args *args,
448 struct nfs4_sequence_res *res,
450 struct rpc_task *task)
452 struct nfs4_slot *slot;
453 struct nfs4_slot_table *tbl;
456 dprintk("--> %s\n", __func__);
457 /* slot already allocated? */
458 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
461 memset(res, 0, sizeof(*res));
462 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
463 tbl = &session->fc_slot_table;
465 spin_lock(&tbl->slot_tbl_lock);
466 if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state)) {
468 * The state manager will wait until the slot table is empty.
469 * Schedule the reset thread
471 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
472 spin_unlock(&tbl->slot_tbl_lock);
473 dprintk("%s Schedule Session Reset\n", __func__);
477 slotid = nfs4_find_slot(tbl, task);
478 if (slotid == NFS4_MAX_SLOT_TABLE) {
479 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
480 spin_unlock(&tbl->slot_tbl_lock);
481 dprintk("<-- %s: no free slots\n", __func__);
484 spin_unlock(&tbl->slot_tbl_lock);
486 slot = tbl->slots + slotid;
487 args->sa_session = session;
488 args->sa_slotid = slotid;
489 args->sa_cache_this = cache_reply;
491 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
493 res->sr_session = session;
494 res->sr_slotid = slotid;
495 res->sr_renewal_time = jiffies;
497 * sr_status is only set in decode_sequence, and so will remain
498 * set to 1 if an rpc level failure occurs.
504 int nfs4_setup_sequence(struct nfs_client *clp,
505 struct nfs4_sequence_args *args,
506 struct nfs4_sequence_res *res,
508 struct rpc_task *task)
512 dprintk("--> %s clp %p session %p sr_slotid %d\n",
513 __func__, clp, clp->cl_session, res->sr_slotid);
515 if (!nfs4_has_session(clp))
517 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
519 if (ret && ret != -EAGAIN) {
520 /* terminate rpc task */
521 task->tk_status = ret;
522 task->tk_action = NULL;
525 dprintk("<-- %s status=%d\n", __func__, ret);
529 struct nfs41_call_sync_data {
530 struct nfs_client *clp;
531 struct nfs4_sequence_args *seq_args;
532 struct nfs4_sequence_res *seq_res;
536 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
538 struct nfs41_call_sync_data *data = calldata;
540 dprintk("--> %s data->clp->cl_session %p\n", __func__,
541 data->clp->cl_session);
542 if (nfs4_setup_sequence(data->clp, data->seq_args,
543 data->seq_res, data->cache_reply, task))
545 rpc_call_start(task);
548 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
550 struct nfs41_call_sync_data *data = calldata;
552 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
555 struct rpc_call_ops nfs41_call_sync_ops = {
556 .rpc_call_prepare = nfs41_call_sync_prepare,
557 .rpc_call_done = nfs41_call_sync_done,
560 static int nfs4_call_sync_sequence(struct nfs_client *clp,
561 struct rpc_clnt *clnt,
562 struct rpc_message *msg,
563 struct nfs4_sequence_args *args,
564 struct nfs4_sequence_res *res,
568 struct rpc_task *task;
569 struct nfs41_call_sync_data data = {
573 .cache_reply = cache_reply,
575 struct rpc_task_setup task_setup = {
578 .callback_ops = &nfs41_call_sync_ops,
579 .callback_data = &data
582 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
583 task = rpc_run_task(&task_setup);
587 ret = task->tk_status;
593 int _nfs4_call_sync_session(struct nfs_server *server,
594 struct rpc_message *msg,
595 struct nfs4_sequence_args *args,
596 struct nfs4_sequence_res *res,
599 return nfs4_call_sync_sequence(server->nfs_client, server->client,
600 msg, args, res, cache_reply);
603 #endif /* CONFIG_NFS_V4_1 */
605 int _nfs4_call_sync(struct nfs_server *server,
606 struct rpc_message *msg,
607 struct nfs4_sequence_args *args,
608 struct nfs4_sequence_res *res,
611 args->sa_session = res->sr_session = NULL;
612 return rpc_call_sync(server->client, msg, 0);
615 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
616 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
617 &(res)->seq_res, (cache_reply))
619 static void nfs4_sequence_done(const struct nfs_server *server,
620 struct nfs4_sequence_res *res, int rpc_status)
622 #ifdef CONFIG_NFS_V4_1
623 if (nfs4_has_session(server->nfs_client))
624 nfs41_sequence_done(server->nfs_client, res, rpc_status);
625 #endif /* CONFIG_NFS_V4_1 */
628 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
630 struct nfs_inode *nfsi = NFS_I(dir);
632 spin_lock(&dir->i_lock);
633 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
634 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
635 nfs_force_lookup_revalidate(dir);
636 nfsi->change_attr = cinfo->after;
637 spin_unlock(&dir->i_lock);
640 struct nfs4_opendata {
642 struct nfs_openargs o_arg;
643 struct nfs_openres o_res;
644 struct nfs_open_confirmargs c_arg;
645 struct nfs_open_confirmres c_res;
646 struct nfs_fattr f_attr;
647 struct nfs_fattr dir_attr;
650 struct nfs4_state_owner *owner;
651 struct nfs4_state *state;
653 unsigned long timestamp;
654 unsigned int rpc_done : 1;
660 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
662 p->o_res.f_attr = &p->f_attr;
663 p->o_res.dir_attr = &p->dir_attr;
664 p->o_res.seqid = p->o_arg.seqid;
665 p->c_res.seqid = p->c_arg.seqid;
666 p->o_res.server = p->o_arg.server;
667 nfs_fattr_init(&p->f_attr);
668 nfs_fattr_init(&p->dir_attr);
669 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
672 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
673 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
674 const struct iattr *attrs)
676 struct dentry *parent = dget_parent(path->dentry);
677 struct inode *dir = parent->d_inode;
678 struct nfs_server *server = NFS_SERVER(dir);
679 struct nfs4_opendata *p;
681 p = kzalloc(sizeof(*p), GFP_KERNEL);
684 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
685 if (p->o_arg.seqid == NULL)
687 p->path.mnt = mntget(path->mnt);
688 p->path.dentry = dget(path->dentry);
691 atomic_inc(&sp->so_count);
692 p->o_arg.fh = NFS_FH(dir);
693 p->o_arg.open_flags = flags;
694 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
695 p->o_arg.clientid = server->nfs_client->cl_clientid;
696 p->o_arg.id = sp->so_owner_id.id;
697 p->o_arg.name = &p->path.dentry->d_name;
698 p->o_arg.server = server;
699 p->o_arg.bitmask = server->attr_bitmask;
700 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
701 if (flags & O_EXCL) {
702 if (nfs4_has_persistent_session(server->nfs_client)) {
704 p->o_arg.u.attrs = &p->attrs;
705 memcpy(&p->attrs, attrs, sizeof(p->attrs));
706 } else { /* EXCLUSIVE4_1 */
707 u32 *s = (u32 *) p->o_arg.u.verifier.data;
711 } else if (flags & O_CREAT) {
712 p->o_arg.u.attrs = &p->attrs;
713 memcpy(&p->attrs, attrs, sizeof(p->attrs));
715 p->c_arg.fh = &p->o_res.fh;
716 p->c_arg.stateid = &p->o_res.stateid;
717 p->c_arg.seqid = p->o_arg.seqid;
718 nfs4_init_opendata_res(p);
728 static void nfs4_opendata_free(struct kref *kref)
730 struct nfs4_opendata *p = container_of(kref,
731 struct nfs4_opendata, kref);
733 nfs_free_seqid(p->o_arg.seqid);
734 if (p->state != NULL)
735 nfs4_put_open_state(p->state);
736 nfs4_put_state_owner(p->owner);
742 static void nfs4_opendata_put(struct nfs4_opendata *p)
745 kref_put(&p->kref, nfs4_opendata_free);
748 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
752 ret = rpc_wait_for_completion_task(task);
756 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
760 if (open_mode & O_EXCL)
762 switch (mode & (FMODE_READ|FMODE_WRITE)) {
764 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
767 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
769 case FMODE_READ|FMODE_WRITE:
770 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
776 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
778 if ((delegation->type & fmode) != fmode)
780 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
782 nfs_mark_delegation_referenced(delegation);
786 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
795 case FMODE_READ|FMODE_WRITE:
798 nfs4_state_set_mode_locked(state, state->state | fmode);
801 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
803 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
804 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
805 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
808 set_bit(NFS_O_RDONLY_STATE, &state->flags);
811 set_bit(NFS_O_WRONLY_STATE, &state->flags);
813 case FMODE_READ|FMODE_WRITE:
814 set_bit(NFS_O_RDWR_STATE, &state->flags);
818 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
820 write_seqlock(&state->seqlock);
821 nfs_set_open_stateid_locked(state, stateid, fmode);
822 write_sequnlock(&state->seqlock);
825 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
828 * Protect the call to nfs4_state_set_mode_locked and
829 * serialise the stateid update
831 write_seqlock(&state->seqlock);
832 if (deleg_stateid != NULL) {
833 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
834 set_bit(NFS_DELEGATED_STATE, &state->flags);
836 if (open_stateid != NULL)
837 nfs_set_open_stateid_locked(state, open_stateid, fmode);
838 write_sequnlock(&state->seqlock);
839 spin_lock(&state->owner->so_lock);
840 update_open_stateflags(state, fmode);
841 spin_unlock(&state->owner->so_lock);
844 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
846 struct nfs_inode *nfsi = NFS_I(state->inode);
847 struct nfs_delegation *deleg_cur;
850 fmode &= (FMODE_READ|FMODE_WRITE);
853 deleg_cur = rcu_dereference(nfsi->delegation);
854 if (deleg_cur == NULL)
857 spin_lock(&deleg_cur->lock);
858 if (nfsi->delegation != deleg_cur ||
859 (deleg_cur->type & fmode) != fmode)
860 goto no_delegation_unlock;
862 if (delegation == NULL)
863 delegation = &deleg_cur->stateid;
864 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
865 goto no_delegation_unlock;
867 nfs_mark_delegation_referenced(deleg_cur);
868 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
870 no_delegation_unlock:
871 spin_unlock(&deleg_cur->lock);
875 if (!ret && open_stateid != NULL) {
876 __update_open_stateid(state, open_stateid, NULL, fmode);
884 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
886 struct nfs_delegation *delegation;
889 delegation = rcu_dereference(NFS_I(inode)->delegation);
890 if (delegation == NULL || (delegation->type & fmode) == fmode) {
895 nfs_inode_return_delegation(inode);
898 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
900 struct nfs4_state *state = opendata->state;
901 struct nfs_inode *nfsi = NFS_I(state->inode);
902 struct nfs_delegation *delegation;
903 int open_mode = opendata->o_arg.open_flags & O_EXCL;
904 fmode_t fmode = opendata->o_arg.fmode;
905 nfs4_stateid stateid;
909 if (can_open_cached(state, fmode, open_mode)) {
910 spin_lock(&state->owner->so_lock);
911 if (can_open_cached(state, fmode, open_mode)) {
912 update_open_stateflags(state, fmode);
913 spin_unlock(&state->owner->so_lock);
914 goto out_return_state;
916 spin_unlock(&state->owner->so_lock);
919 delegation = rcu_dereference(nfsi->delegation);
920 if (delegation == NULL ||
921 !can_open_delegated(delegation, fmode)) {
925 /* Save the delegation */
926 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
928 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
933 /* Try to update the stateid using the delegation */
934 if (update_open_stateid(state, NULL, &stateid, fmode))
935 goto out_return_state;
940 atomic_inc(&state->count);
944 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
947 struct nfs4_state *state = NULL;
948 struct nfs_delegation *delegation;
951 if (!data->rpc_done) {
952 state = nfs4_try_open_cached(data);
957 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
959 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
960 ret = PTR_ERR(inode);
964 state = nfs4_get_open_state(inode, data->owner);
967 if (data->o_res.delegation_type != 0) {
968 int delegation_flags = 0;
971 delegation = rcu_dereference(NFS_I(inode)->delegation);
973 delegation_flags = delegation->flags;
975 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
976 nfs_inode_set_delegation(state->inode,
977 data->owner->so_cred,
980 nfs_inode_reclaim_delegation(state->inode,
981 data->owner->so_cred,
985 update_open_stateid(state, &data->o_res.stateid, NULL,
996 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
998 struct nfs_inode *nfsi = NFS_I(state->inode);
999 struct nfs_open_context *ctx;
1001 spin_lock(&state->inode->i_lock);
1002 list_for_each_entry(ctx, &nfsi->open_files, list) {
1003 if (ctx->state != state)
1005 get_nfs_open_context(ctx);
1006 spin_unlock(&state->inode->i_lock);
1009 spin_unlock(&state->inode->i_lock);
1010 return ERR_PTR(-ENOENT);
1013 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1015 struct nfs4_opendata *opendata;
1017 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
1018 if (opendata == NULL)
1019 return ERR_PTR(-ENOMEM);
1020 opendata->state = state;
1021 atomic_inc(&state->count);
1025 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1027 struct nfs4_state *newstate;
1030 opendata->o_arg.open_flags = 0;
1031 opendata->o_arg.fmode = fmode;
1032 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1033 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1034 nfs4_init_opendata_res(opendata);
1035 ret = _nfs4_proc_open(opendata);
1038 newstate = nfs4_opendata_to_nfs4_state(opendata);
1039 if (IS_ERR(newstate))
1040 return PTR_ERR(newstate);
1041 nfs4_close_state(&opendata->path, newstate, fmode);
1046 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1048 struct nfs4_state *newstate;
1051 /* memory barrier prior to reading state->n_* */
1052 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1054 if (state->n_rdwr != 0) {
1055 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1058 if (newstate != state)
1061 if (state->n_wronly != 0) {
1062 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1065 if (newstate != state)
1068 if (state->n_rdonly != 0) {
1069 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1072 if (newstate != state)
1076 * We may have performed cached opens for all three recoveries.
1077 * Check if we need to update the current stateid.
1079 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1080 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1081 write_seqlock(&state->seqlock);
1082 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1083 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1084 write_sequnlock(&state->seqlock);
1091 * reclaim state on the server after a reboot.
1093 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1095 struct nfs_delegation *delegation;
1096 struct nfs4_opendata *opendata;
1097 fmode_t delegation_type = 0;
1100 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1101 if (IS_ERR(opendata))
1102 return PTR_ERR(opendata);
1103 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1104 opendata->o_arg.fh = NFS_FH(state->inode);
1106 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1107 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1108 delegation_type = delegation->type;
1110 opendata->o_arg.u.delegation_type = delegation_type;
1111 status = nfs4_open_recover(opendata, state);
1112 nfs4_opendata_put(opendata);
1116 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1118 struct nfs_server *server = NFS_SERVER(state->inode);
1119 struct nfs4_exception exception = { };
1122 err = _nfs4_do_open_reclaim(ctx, state);
1123 if (err != -NFS4ERR_DELAY)
1125 nfs4_handle_exception(server, err, &exception);
1126 } while (exception.retry);
1130 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1132 struct nfs_open_context *ctx;
1135 ctx = nfs4_state_find_open_context(state);
1137 return PTR_ERR(ctx);
1138 ret = nfs4_do_open_reclaim(ctx, state);
1139 put_nfs_open_context(ctx);
1143 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1145 struct nfs4_opendata *opendata;
1148 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1149 if (IS_ERR(opendata))
1150 return PTR_ERR(opendata);
1151 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1152 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1153 sizeof(opendata->o_arg.u.delegation.data));
1154 ret = nfs4_open_recover(opendata, state);
1155 nfs4_opendata_put(opendata);
1159 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1161 struct nfs4_exception exception = { };
1162 struct nfs_server *server = NFS_SERVER(state->inode);
1165 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1171 case -NFS4ERR_BADSESSION:
1172 case -NFS4ERR_BADSLOT:
1173 case -NFS4ERR_BAD_HIGH_SLOT:
1174 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1175 case -NFS4ERR_DEADSESSION:
1176 nfs4_schedule_state_recovery(
1177 server->nfs_client);
1179 case -NFS4ERR_STALE_CLIENTID:
1180 case -NFS4ERR_STALE_STATEID:
1181 case -NFS4ERR_EXPIRED:
1182 /* Don't recall a delegation if it was lost */
1183 nfs4_schedule_state_recovery(server->nfs_client);
1187 * The show must go on: exit, but mark the
1188 * stateid as needing recovery.
1190 case -NFS4ERR_ADMIN_REVOKED:
1191 case -NFS4ERR_BAD_STATEID:
1192 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1197 err = nfs4_handle_exception(server, err, &exception);
1198 } while (exception.retry);
1203 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1205 struct nfs4_opendata *data = calldata;
1207 data->rpc_status = task->tk_status;
1208 if (RPC_ASSASSINATED(task))
1210 if (data->rpc_status == 0) {
1211 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1212 sizeof(data->o_res.stateid.data));
1213 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1214 renew_lease(data->o_res.server, data->timestamp);
1219 static void nfs4_open_confirm_release(void *calldata)
1221 struct nfs4_opendata *data = calldata;
1222 struct nfs4_state *state = NULL;
1224 /* If this request hasn't been cancelled, do nothing */
1225 if (data->cancelled == 0)
1227 /* In case of error, no cleanup! */
1228 if (!data->rpc_done)
1230 state = nfs4_opendata_to_nfs4_state(data);
1232 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1234 nfs4_opendata_put(data);
1237 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1238 .rpc_call_done = nfs4_open_confirm_done,
1239 .rpc_release = nfs4_open_confirm_release,
1243 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1245 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1247 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1248 struct rpc_task *task;
1249 struct rpc_message msg = {
1250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1251 .rpc_argp = &data->c_arg,
1252 .rpc_resp = &data->c_res,
1253 .rpc_cred = data->owner->so_cred,
1255 struct rpc_task_setup task_setup_data = {
1256 .rpc_client = server->client,
1257 .rpc_message = &msg,
1258 .callback_ops = &nfs4_open_confirm_ops,
1259 .callback_data = data,
1260 .workqueue = nfsiod_workqueue,
1261 .flags = RPC_TASK_ASYNC,
1265 kref_get(&data->kref);
1267 data->rpc_status = 0;
1268 data->timestamp = jiffies;
1269 task = rpc_run_task(&task_setup_data);
1271 return PTR_ERR(task);
1272 status = nfs4_wait_for_completion_rpc_task(task);
1274 data->cancelled = 1;
1277 status = data->rpc_status;
1282 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1284 struct nfs4_opendata *data = calldata;
1285 struct nfs4_state_owner *sp = data->owner;
1287 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1290 * Check if we still need to send an OPEN call, or if we can use
1291 * a delegation instead.
1293 if (data->state != NULL) {
1294 struct nfs_delegation *delegation;
1296 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1299 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1300 if (delegation != NULL &&
1301 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1307 /* Update sequence id. */
1308 data->o_arg.id = sp->so_owner_id.id;
1309 data->o_arg.clientid = sp->so_client->cl_clientid;
1310 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1311 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1312 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1314 data->timestamp = jiffies;
1315 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1316 &data->o_arg.seq_args,
1317 &data->o_res.seq_res, 1, task))
1319 rpc_call_start(task);
1322 task->tk_action = NULL;
1326 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1328 struct nfs4_opendata *data = calldata;
1330 data->rpc_status = task->tk_status;
1332 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1335 if (RPC_ASSASSINATED(task))
1337 if (task->tk_status == 0) {
1338 switch (data->o_res.f_attr->mode & S_IFMT) {
1342 data->rpc_status = -ELOOP;
1345 data->rpc_status = -EISDIR;
1348 data->rpc_status = -ENOTDIR;
1350 renew_lease(data->o_res.server, data->timestamp);
1351 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1352 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1357 static void nfs4_open_release(void *calldata)
1359 struct nfs4_opendata *data = calldata;
1360 struct nfs4_state *state = NULL;
1362 /* If this request hasn't been cancelled, do nothing */
1363 if (data->cancelled == 0)
1365 /* In case of error, no cleanup! */
1366 if (data->rpc_status != 0 || !data->rpc_done)
1368 /* In case we need an open_confirm, no cleanup! */
1369 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1371 state = nfs4_opendata_to_nfs4_state(data);
1373 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1375 nfs4_opendata_put(data);
1378 static const struct rpc_call_ops nfs4_open_ops = {
1379 .rpc_call_prepare = nfs4_open_prepare,
1380 .rpc_call_done = nfs4_open_done,
1381 .rpc_release = nfs4_open_release,
1385 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1387 static int _nfs4_proc_open(struct nfs4_opendata *data)
1389 struct inode *dir = data->dir->d_inode;
1390 struct nfs_server *server = NFS_SERVER(dir);
1391 struct nfs_openargs *o_arg = &data->o_arg;
1392 struct nfs_openres *o_res = &data->o_res;
1393 struct rpc_task *task;
1394 struct rpc_message msg = {
1395 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1398 .rpc_cred = data->owner->so_cred,
1400 struct rpc_task_setup task_setup_data = {
1401 .rpc_client = server->client,
1402 .rpc_message = &msg,
1403 .callback_ops = &nfs4_open_ops,
1404 .callback_data = data,
1405 .workqueue = nfsiod_workqueue,
1406 .flags = RPC_TASK_ASYNC,
1410 kref_get(&data->kref);
1412 data->rpc_status = 0;
1413 data->cancelled = 0;
1414 task = rpc_run_task(&task_setup_data);
1416 return PTR_ERR(task);
1417 status = nfs4_wait_for_completion_rpc_task(task);
1419 data->cancelled = 1;
1422 status = data->rpc_status;
1424 if (status != 0 || !data->rpc_done)
1427 if (o_res->fh.size == 0)
1428 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1430 if (o_arg->open_flags & O_CREAT) {
1431 update_changeattr(dir, &o_res->cinfo);
1432 nfs_post_op_update_inode(dir, o_res->dir_attr);
1434 nfs_refresh_inode(dir, o_res->dir_attr);
1435 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1436 status = _nfs4_proc_open_confirm(data);
1440 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1441 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1445 static int nfs4_recover_expired_lease(struct nfs_server *server)
1447 struct nfs_client *clp = server->nfs_client;
1451 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1452 ret = nfs4_wait_clnt_recover(clp);
1455 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1456 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1458 nfs4_schedule_state_recovery(clp);
1466 * reclaim state on the server after a network partition.
1467 * Assumes caller holds the appropriate lock
1469 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1471 struct nfs4_opendata *opendata;
1474 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1475 if (IS_ERR(opendata))
1476 return PTR_ERR(opendata);
1477 ret = nfs4_open_recover(opendata, state);
1479 d_drop(ctx->path.dentry);
1480 nfs4_opendata_put(opendata);
1484 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1486 struct nfs_server *server = NFS_SERVER(state->inode);
1487 struct nfs4_exception exception = { };
1491 err = _nfs4_open_expired(ctx, state);
1495 case -NFS4ERR_GRACE:
1496 case -NFS4ERR_DELAY:
1497 nfs4_handle_exception(server, err, &exception);
1500 } while (exception.retry);
1505 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1507 struct nfs_open_context *ctx;
1510 ctx = nfs4_state_find_open_context(state);
1512 return PTR_ERR(ctx);
1513 ret = nfs4_do_open_expired(ctx, state);
1514 put_nfs_open_context(ctx);
1519 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1520 * fields corresponding to attributes that were used to store the verifier.
1521 * Make sure we clobber those fields in the later setattr call
1523 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1525 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1526 !(sattr->ia_valid & ATTR_ATIME_SET))
1527 sattr->ia_valid |= ATTR_ATIME;
1529 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1530 !(sattr->ia_valid & ATTR_MTIME_SET))
1531 sattr->ia_valid |= ATTR_MTIME;
1535 * Returns a referenced nfs4_state
1537 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)
1539 struct nfs4_state_owner *sp;
1540 struct nfs4_state *state = NULL;
1541 struct nfs_server *server = NFS_SERVER(dir);
1542 struct nfs4_opendata *opendata;
1545 /* Protect against reboot recovery conflicts */
1547 if (!(sp = nfs4_get_state_owner(server, cred))) {
1548 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1551 status = nfs4_recover_expired_lease(server);
1553 goto err_put_state_owner;
1554 if (path->dentry->d_inode != NULL)
1555 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1557 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1558 if (opendata == NULL)
1559 goto err_put_state_owner;
1561 if (path->dentry->d_inode != NULL)
1562 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1564 status = _nfs4_proc_open(opendata);
1566 goto err_opendata_put;
1568 if (opendata->o_arg.open_flags & O_EXCL)
1569 nfs4_exclusive_attrset(opendata, sattr);
1571 state = nfs4_opendata_to_nfs4_state(opendata);
1572 status = PTR_ERR(state);
1574 goto err_opendata_put;
1575 nfs4_opendata_put(opendata);
1576 nfs4_put_state_owner(sp);
1580 nfs4_opendata_put(opendata);
1581 err_put_state_owner:
1582 nfs4_put_state_owner(sp);
1589 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)
1591 struct nfs4_exception exception = { };
1592 struct nfs4_state *res;
1596 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1599 /* NOTE: BAD_SEQID means the server and client disagree about the
1600 * book-keeping w.r.t. state-changing operations
1601 * (OPEN/CLOSE/LOCK/LOCKU...)
1602 * It is actually a sign of a bug on the client or on the server.
1604 * If we receive a BAD_SEQID error in the particular case of
1605 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1606 * have unhashed the old state_owner for us, and that we can
1607 * therefore safely retry using a new one. We should still warn
1608 * the user though...
1610 if (status == -NFS4ERR_BAD_SEQID) {
1611 printk(KERN_WARNING "NFS: v4 server %s "
1612 " returned a bad sequence-id error!\n",
1613 NFS_SERVER(dir)->nfs_client->cl_hostname);
1614 exception.retry = 1;
1618 * BAD_STATEID on OPEN means that the server cancelled our
1619 * state before it received the OPEN_CONFIRM.
1620 * Recover by retrying the request as per the discussion
1621 * on Page 181 of RFC3530.
1623 if (status == -NFS4ERR_BAD_STATEID) {
1624 exception.retry = 1;
1627 if (status == -EAGAIN) {
1628 /* We must have found a delegation */
1629 exception.retry = 1;
1632 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1633 status, &exception));
1634 } while (exception.retry);
1638 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1639 struct nfs_fattr *fattr, struct iattr *sattr,
1640 struct nfs4_state *state)
1642 struct nfs_server *server = NFS_SERVER(inode);
1643 struct nfs_setattrargs arg = {
1644 .fh = NFS_FH(inode),
1647 .bitmask = server->attr_bitmask,
1649 struct nfs_setattrres res = {
1653 struct rpc_message msg = {
1654 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1659 unsigned long timestamp = jiffies;
1662 nfs_fattr_init(fattr);
1664 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1665 /* Use that stateid */
1666 } else if (state != NULL) {
1667 nfs4_copy_stateid(&arg.stateid, state, current->files);
1669 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1671 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1672 if (status == 0 && state != NULL)
1673 renew_lease(server, timestamp);
1677 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1678 struct nfs_fattr *fattr, struct iattr *sattr,
1679 struct nfs4_state *state)
1681 struct nfs_server *server = NFS_SERVER(inode);
1682 struct nfs4_exception exception = { };
1685 err = nfs4_handle_exception(server,
1686 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1688 } while (exception.retry);
1692 struct nfs4_closedata {
1694 struct inode *inode;
1695 struct nfs4_state *state;
1696 struct nfs_closeargs arg;
1697 struct nfs_closeres res;
1698 struct nfs_fattr fattr;
1699 unsigned long timestamp;
1702 static void nfs4_free_closedata(void *data)
1704 struct nfs4_closedata *calldata = data;
1705 struct nfs4_state_owner *sp = calldata->state->owner;
1707 nfs4_put_open_state(calldata->state);
1708 nfs_free_seqid(calldata->arg.seqid);
1709 nfs4_put_state_owner(sp);
1710 path_put(&calldata->path);
1714 static void nfs4_close_done(struct rpc_task *task, void *data)
1716 struct nfs4_closedata *calldata = data;
1717 struct nfs4_state *state = calldata->state;
1718 struct nfs_server *server = NFS_SERVER(calldata->inode);
1720 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
1721 if (RPC_ASSASSINATED(task))
1723 /* hmm. we are done with the inode, and in the process of freeing
1724 * the state_owner. we keep this around to process errors
1726 switch (task->tk_status) {
1728 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1729 renew_lease(server, calldata->timestamp);
1731 case -NFS4ERR_STALE_STATEID:
1732 case -NFS4ERR_OLD_STATEID:
1733 case -NFS4ERR_BAD_STATEID:
1734 case -NFS4ERR_EXPIRED:
1735 if (calldata->arg.fmode == 0)
1738 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1739 nfs_restart_rpc(task, server->nfs_client);
1743 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1746 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1748 struct nfs4_closedata *calldata = data;
1749 struct nfs4_state *state = calldata->state;
1750 int clear_rd, clear_wr, clear_rdwr;
1752 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1755 clear_rd = clear_wr = clear_rdwr = 0;
1756 spin_lock(&state->owner->so_lock);
1757 /* Calculate the change in open mode */
1758 if (state->n_rdwr == 0) {
1759 if (state->n_rdonly == 0) {
1760 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1761 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1763 if (state->n_wronly == 0) {
1764 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1765 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1768 spin_unlock(&state->owner->so_lock);
1769 if (!clear_rd && !clear_wr && !clear_rdwr) {
1770 /* Note: exit _without_ calling nfs4_close_done */
1771 task->tk_action = NULL;
1774 nfs_fattr_init(calldata->res.fattr);
1775 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1776 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1777 calldata->arg.fmode = FMODE_READ;
1778 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1779 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1780 calldata->arg.fmode = FMODE_WRITE;
1782 calldata->timestamp = jiffies;
1783 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1784 &calldata->arg.seq_args, &calldata->res.seq_res,
1787 rpc_call_start(task);
1790 static const struct rpc_call_ops nfs4_close_ops = {
1791 .rpc_call_prepare = nfs4_close_prepare,
1792 .rpc_call_done = nfs4_close_done,
1793 .rpc_release = nfs4_free_closedata,
1797 * It is possible for data to be read/written from a mem-mapped file
1798 * after the sys_close call (which hits the vfs layer as a flush).
1799 * This means that we can't safely call nfsv4 close on a file until
1800 * the inode is cleared. This in turn means that we are not good
1801 * NFSv4 citizens - we do not indicate to the server to update the file's
1802 * share state even when we are done with one of the three share
1803 * stateid's in the inode.
1805 * NOTE: Caller must be holding the sp->so_owner semaphore!
1807 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1809 struct nfs_server *server = NFS_SERVER(state->inode);
1810 struct nfs4_closedata *calldata;
1811 struct nfs4_state_owner *sp = state->owner;
1812 struct rpc_task *task;
1813 struct rpc_message msg = {
1814 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1815 .rpc_cred = state->owner->so_cred,
1817 struct rpc_task_setup task_setup_data = {
1818 .rpc_client = server->client,
1819 .rpc_message = &msg,
1820 .callback_ops = &nfs4_close_ops,
1821 .workqueue = nfsiod_workqueue,
1822 .flags = RPC_TASK_ASYNC,
1824 int status = -ENOMEM;
1826 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1827 if (calldata == NULL)
1829 calldata->inode = state->inode;
1830 calldata->state = state;
1831 calldata->arg.fh = NFS_FH(state->inode);
1832 calldata->arg.stateid = &state->open_stateid;
1833 if (nfs4_has_session(server->nfs_client))
1834 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1835 /* Serialization for the sequence id */
1836 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1837 if (calldata->arg.seqid == NULL)
1838 goto out_free_calldata;
1839 calldata->arg.fmode = 0;
1840 calldata->arg.bitmask = server->cache_consistency_bitmask;
1841 calldata->res.fattr = &calldata->fattr;
1842 calldata->res.seqid = calldata->arg.seqid;
1843 calldata->res.server = server;
1844 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
1845 calldata->path.mnt = mntget(path->mnt);
1846 calldata->path.dentry = dget(path->dentry);
1848 msg.rpc_argp = &calldata->arg,
1849 msg.rpc_resp = &calldata->res,
1850 task_setup_data.callback_data = calldata;
1851 task = rpc_run_task(&task_setup_data);
1853 return PTR_ERR(task);
1856 status = rpc_wait_for_completion_task(task);
1862 nfs4_put_open_state(state);
1863 nfs4_put_state_owner(sp);
1867 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1872 /* If the open_intent is for execute, we have an extra check to make */
1873 if (fmode & FMODE_EXEC) {
1874 ret = nfs_may_open(state->inode,
1875 state->owner->so_cred,
1876 nd->intent.open.flags);
1880 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1881 if (!IS_ERR(filp)) {
1882 struct nfs_open_context *ctx;
1883 ctx = nfs_file_open_context(filp);
1887 ret = PTR_ERR(filp);
1889 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1894 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1896 struct path path = {
1897 .mnt = nd->path.mnt,
1900 struct dentry *parent;
1902 struct rpc_cred *cred;
1903 struct nfs4_state *state;
1905 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1907 if (nd->flags & LOOKUP_CREATE) {
1908 attr.ia_mode = nd->intent.open.create_mode;
1909 attr.ia_valid = ATTR_MODE;
1910 if (!IS_POSIXACL(dir))
1911 attr.ia_mode &= ~current_umask();
1914 BUG_ON(nd->intent.open.flags & O_CREAT);
1917 cred = rpc_lookup_cred();
1919 return (struct dentry *)cred;
1920 parent = dentry->d_parent;
1921 /* Protect against concurrent sillydeletes */
1922 nfs_block_sillyrename(parent);
1923 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1925 if (IS_ERR(state)) {
1926 if (PTR_ERR(state) == -ENOENT) {
1927 d_add(dentry, NULL);
1928 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1930 nfs_unblock_sillyrename(parent);
1931 return (struct dentry *)state;
1933 res = d_add_unique(dentry, igrab(state->inode));
1936 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1937 nfs_unblock_sillyrename(parent);
1938 nfs4_intent_set_file(nd, &path, state, fmode);
1943 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1945 struct path path = {
1946 .mnt = nd->path.mnt,
1949 struct rpc_cred *cred;
1950 struct nfs4_state *state;
1951 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1953 cred = rpc_lookup_cred();
1955 return PTR_ERR(cred);
1956 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1958 if (IS_ERR(state)) {
1959 switch (PTR_ERR(state)) {
1965 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1971 if (state->inode == dentry->d_inode) {
1972 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1973 nfs4_intent_set_file(nd, &path, state, fmode);
1976 nfs4_close_sync(&path, state, fmode);
1982 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1984 if (ctx->state == NULL)
1987 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1989 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1992 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1994 struct nfs4_server_caps_arg args = {
1997 struct nfs4_server_caps_res res = {};
1998 struct rpc_message msg = {
1999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2005 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2007 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2008 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2009 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2010 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2011 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2012 NFS_CAP_CTIME|NFS_CAP_MTIME);
2013 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2014 server->caps |= NFS_CAP_ACLS;
2015 if (res.has_links != 0)
2016 server->caps |= NFS_CAP_HARDLINKS;
2017 if (res.has_symlinks != 0)
2018 server->caps |= NFS_CAP_SYMLINKS;
2019 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2020 server->caps |= NFS_CAP_FILEID;
2021 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2022 server->caps |= NFS_CAP_MODE;
2023 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2024 server->caps |= NFS_CAP_NLINK;
2025 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2026 server->caps |= NFS_CAP_OWNER;
2027 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2028 server->caps |= NFS_CAP_OWNER_GROUP;
2029 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2030 server->caps |= NFS_CAP_ATIME;
2031 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2032 server->caps |= NFS_CAP_CTIME;
2033 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2034 server->caps |= NFS_CAP_MTIME;
2036 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2037 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2038 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2039 server->acl_bitmask = res.acl_bitmask;
2045 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2047 struct nfs4_exception exception = { };
2050 err = nfs4_handle_exception(server,
2051 _nfs4_server_capabilities(server, fhandle),
2053 } while (exception.retry);
2057 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2058 struct nfs_fsinfo *info)
2060 struct nfs4_lookup_root_arg args = {
2061 .bitmask = nfs4_fattr_bitmap,
2063 struct nfs4_lookup_res res = {
2065 .fattr = info->fattr,
2068 struct rpc_message msg = {
2069 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2074 nfs_fattr_init(info->fattr);
2075 return nfs4_call_sync(server, &msg, &args, &res, 0);
2078 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2079 struct nfs_fsinfo *info)
2081 struct nfs4_exception exception = { };
2084 err = nfs4_handle_exception(server,
2085 _nfs4_lookup_root(server, fhandle, info),
2087 } while (exception.retry);
2092 * get the file handle for the "/" directory on the server
2094 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2095 struct nfs_fsinfo *info)
2099 status = nfs4_lookup_root(server, fhandle, info);
2101 status = nfs4_server_capabilities(server, fhandle);
2103 status = nfs4_do_fsinfo(server, fhandle, info);
2104 return nfs4_map_errors(status);
2108 * Get locations and (maybe) other attributes of a referral.
2109 * Note that we'll actually follow the referral later when
2110 * we detect fsid mismatch in inode revalidation
2112 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2114 int status = -ENOMEM;
2115 struct page *page = NULL;
2116 struct nfs4_fs_locations *locations = NULL;
2118 page = alloc_page(GFP_KERNEL);
2121 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2122 if (locations == NULL)
2125 status = nfs4_proc_fs_locations(dir, name, locations, page);
2128 /* Make sure server returned a different fsid for the referral */
2129 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2130 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2135 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2136 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2138 fattr->mode = S_IFDIR;
2139 memset(fhandle, 0, sizeof(struct nfs_fh));
2148 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2150 struct nfs4_getattr_arg args = {
2152 .bitmask = server->attr_bitmask,
2154 struct nfs4_getattr_res res = {
2158 struct rpc_message msg = {
2159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2164 nfs_fattr_init(fattr);
2165 return nfs4_call_sync(server, &msg, &args, &res, 0);
2168 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2170 struct nfs4_exception exception = { };
2173 err = nfs4_handle_exception(server,
2174 _nfs4_proc_getattr(server, fhandle, fattr),
2176 } while (exception.retry);
2181 * The file is not closed if it is opened due to the a request to change
2182 * the size of the file. The open call will not be needed once the
2183 * VFS layer lookup-intents are implemented.
2185 * Close is called when the inode is destroyed.
2186 * If we haven't opened the file for O_WRONLY, we
2187 * need to in the size_change case to obtain a stateid.
2190 * Because OPEN is always done by name in nfsv4, it is
2191 * possible that we opened a different file by the same
2192 * name. We can recognize this race condition, but we
2193 * can't do anything about it besides returning an error.
2195 * This will be fixed with VFS changes (lookup-intent).
2198 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2199 struct iattr *sattr)
2201 struct inode *inode = dentry->d_inode;
2202 struct rpc_cred *cred = NULL;
2203 struct nfs4_state *state = NULL;
2206 nfs_fattr_init(fattr);
2208 /* Search for an existing open(O_WRITE) file */
2209 if (sattr->ia_valid & ATTR_FILE) {
2210 struct nfs_open_context *ctx;
2212 ctx = nfs_file_open_context(sattr->ia_file);
2219 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2221 nfs_setattr_update_inode(inode, sattr);
2225 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2226 const struct qstr *name, struct nfs_fh *fhandle,
2227 struct nfs_fattr *fattr)
2230 struct nfs4_lookup_arg args = {
2231 .bitmask = server->attr_bitmask,
2235 struct nfs4_lookup_res res = {
2240 struct rpc_message msg = {
2241 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2246 nfs_fattr_init(fattr);
2248 dprintk("NFS call lookupfh %s\n", name->name);
2249 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2250 dprintk("NFS reply lookupfh: %d\n", status);
2254 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2255 struct qstr *name, struct nfs_fh *fhandle,
2256 struct nfs_fattr *fattr)
2258 struct nfs4_exception exception = { };
2261 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2263 if (err == -NFS4ERR_MOVED) {
2267 err = nfs4_handle_exception(server, err, &exception);
2268 } while (exception.retry);
2272 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2273 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2277 dprintk("NFS call lookup %s\n", name->name);
2278 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2279 if (status == -NFS4ERR_MOVED)
2280 status = nfs4_get_referral(dir, name, fattr, fhandle);
2281 dprintk("NFS reply lookup: %d\n", status);
2285 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2287 struct nfs4_exception exception = { };
2290 err = nfs4_handle_exception(NFS_SERVER(dir),
2291 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2293 } while (exception.retry);
2297 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2299 struct nfs_server *server = NFS_SERVER(inode);
2300 struct nfs_fattr fattr;
2301 struct nfs4_accessargs args = {
2302 .fh = NFS_FH(inode),
2303 .bitmask = server->attr_bitmask,
2305 struct nfs4_accessres res = {
2309 struct rpc_message msg = {
2310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2313 .rpc_cred = entry->cred,
2315 int mode = entry->mask;
2319 * Determine which access bits we want to ask for...
2321 if (mode & MAY_READ)
2322 args.access |= NFS4_ACCESS_READ;
2323 if (S_ISDIR(inode->i_mode)) {
2324 if (mode & MAY_WRITE)
2325 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2326 if (mode & MAY_EXEC)
2327 args.access |= NFS4_ACCESS_LOOKUP;
2329 if (mode & MAY_WRITE)
2330 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2331 if (mode & MAY_EXEC)
2332 args.access |= NFS4_ACCESS_EXECUTE;
2334 nfs_fattr_init(&fattr);
2335 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2338 if (res.access & NFS4_ACCESS_READ)
2339 entry->mask |= MAY_READ;
2340 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2341 entry->mask |= MAY_WRITE;
2342 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2343 entry->mask |= MAY_EXEC;
2344 nfs_refresh_inode(inode, &fattr);
2349 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2351 struct nfs4_exception exception = { };
2354 err = nfs4_handle_exception(NFS_SERVER(inode),
2355 _nfs4_proc_access(inode, entry),
2357 } while (exception.retry);
2362 * TODO: For the time being, we don't try to get any attributes
2363 * along with any of the zero-copy operations READ, READDIR,
2366 * In the case of the first three, we want to put the GETATTR
2367 * after the read-type operation -- this is because it is hard
2368 * to predict the length of a GETATTR response in v4, and thus
2369 * align the READ data correctly. This means that the GETATTR
2370 * may end up partially falling into the page cache, and we should
2371 * shift it into the 'tail' of the xdr_buf before processing.
2372 * To do this efficiently, we need to know the total length
2373 * of data received, which doesn't seem to be available outside
2376 * In the case of WRITE, we also want to put the GETATTR after
2377 * the operation -- in this case because we want to make sure
2378 * we get the post-operation mtime and size. This means that
2379 * we can't use xdr_encode_pages() as written: we need a variant
2380 * of it which would leave room in the 'tail' iovec.
2382 * Both of these changes to the XDR layer would in fact be quite
2383 * minor, but I decided to leave them for a subsequent patch.
2385 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2386 unsigned int pgbase, unsigned int pglen)
2388 struct nfs4_readlink args = {
2389 .fh = NFS_FH(inode),
2394 struct nfs4_readlink_res res;
2395 struct rpc_message msg = {
2396 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2401 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2404 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2405 unsigned int pgbase, unsigned int pglen)
2407 struct nfs4_exception exception = { };
2410 err = nfs4_handle_exception(NFS_SERVER(inode),
2411 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2413 } while (exception.retry);
2419 * We will need to arrange for the VFS layer to provide an atomic open.
2420 * Until then, this create/open method is prone to inefficiency and race
2421 * conditions due to the lookup, create, and open VFS calls from sys_open()
2422 * placed on the wire.
2424 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2425 * The file will be opened again in the subsequent VFS open call
2426 * (nfs4_proc_file_open).
2428 * The open for read will just hang around to be used by any process that
2429 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2433 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2434 int flags, struct nameidata *nd)
2436 struct path path = {
2437 .mnt = nd->path.mnt,
2440 struct nfs4_state *state;
2441 struct rpc_cred *cred;
2442 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2445 cred = rpc_lookup_cred();
2447 status = PTR_ERR(cred);
2450 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2452 if (IS_ERR(state)) {
2453 status = PTR_ERR(state);
2456 d_add(dentry, igrab(state->inode));
2457 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2458 if (flags & O_EXCL) {
2459 struct nfs_fattr fattr;
2460 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2462 nfs_setattr_update_inode(state->inode, sattr);
2463 nfs_post_op_update_inode(state->inode, &fattr);
2465 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2466 status = nfs4_intent_set_file(nd, &path, state, fmode);
2468 nfs4_close_sync(&path, state, fmode);
2475 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2477 struct nfs_server *server = NFS_SERVER(dir);
2478 struct nfs_removeargs args = {
2480 .name.len = name->len,
2481 .name.name = name->name,
2482 .bitmask = server->attr_bitmask,
2484 struct nfs_removeres res = {
2487 struct rpc_message msg = {
2488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2494 nfs_fattr_init(&res.dir_attr);
2495 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2497 update_changeattr(dir, &res.cinfo);
2498 nfs_post_op_update_inode(dir, &res.dir_attr);
2503 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2505 struct nfs4_exception exception = { };
2508 err = nfs4_handle_exception(NFS_SERVER(dir),
2509 _nfs4_proc_remove(dir, name),
2511 } while (exception.retry);
2515 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2517 struct nfs_server *server = NFS_SERVER(dir);
2518 struct nfs_removeargs *args = msg->rpc_argp;
2519 struct nfs_removeres *res = msg->rpc_resp;
2521 args->bitmask = server->cache_consistency_bitmask;
2522 res->server = server;
2523 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2526 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2528 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2530 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
2531 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2533 update_changeattr(dir, &res->cinfo);
2534 nfs_post_op_update_inode(dir, &res->dir_attr);
2538 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2539 struct inode *new_dir, struct qstr *new_name)
2541 struct nfs_server *server = NFS_SERVER(old_dir);
2542 struct nfs4_rename_arg arg = {
2543 .old_dir = NFS_FH(old_dir),
2544 .new_dir = NFS_FH(new_dir),
2545 .old_name = old_name,
2546 .new_name = new_name,
2547 .bitmask = server->attr_bitmask,
2549 struct nfs_fattr old_fattr, new_fattr;
2550 struct nfs4_rename_res res = {
2552 .old_fattr = &old_fattr,
2553 .new_fattr = &new_fattr,
2555 struct rpc_message msg = {
2556 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2562 nfs_fattr_init(res.old_fattr);
2563 nfs_fattr_init(res.new_fattr);
2564 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2567 update_changeattr(old_dir, &res.old_cinfo);
2568 nfs_post_op_update_inode(old_dir, res.old_fattr);
2569 update_changeattr(new_dir, &res.new_cinfo);
2570 nfs_post_op_update_inode(new_dir, res.new_fattr);
2575 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2576 struct inode *new_dir, struct qstr *new_name)
2578 struct nfs4_exception exception = { };
2581 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2582 _nfs4_proc_rename(old_dir, old_name,
2585 } while (exception.retry);
2589 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2591 struct nfs_server *server = NFS_SERVER(inode);
2592 struct nfs4_link_arg arg = {
2593 .fh = NFS_FH(inode),
2594 .dir_fh = NFS_FH(dir),
2596 .bitmask = server->attr_bitmask,
2598 struct nfs_fattr fattr, dir_attr;
2599 struct nfs4_link_res res = {
2602 .dir_attr = &dir_attr,
2604 struct rpc_message msg = {
2605 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2611 nfs_fattr_init(res.fattr);
2612 nfs_fattr_init(res.dir_attr);
2613 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2615 update_changeattr(dir, &res.cinfo);
2616 nfs_post_op_update_inode(dir, res.dir_attr);
2617 nfs_post_op_update_inode(inode, res.fattr);
2623 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2625 struct nfs4_exception exception = { };
2628 err = nfs4_handle_exception(NFS_SERVER(inode),
2629 _nfs4_proc_link(inode, dir, name),
2631 } while (exception.retry);
2635 struct nfs4_createdata {
2636 struct rpc_message msg;
2637 struct nfs4_create_arg arg;
2638 struct nfs4_create_res res;
2640 struct nfs_fattr fattr;
2641 struct nfs_fattr dir_fattr;
2644 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2645 struct qstr *name, struct iattr *sattr, u32 ftype)
2647 struct nfs4_createdata *data;
2649 data = kzalloc(sizeof(*data), GFP_KERNEL);
2651 struct nfs_server *server = NFS_SERVER(dir);
2653 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2654 data->msg.rpc_argp = &data->arg;
2655 data->msg.rpc_resp = &data->res;
2656 data->arg.dir_fh = NFS_FH(dir);
2657 data->arg.server = server;
2658 data->arg.name = name;
2659 data->arg.attrs = sattr;
2660 data->arg.ftype = ftype;
2661 data->arg.bitmask = server->attr_bitmask;
2662 data->res.server = server;
2663 data->res.fh = &data->fh;
2664 data->res.fattr = &data->fattr;
2665 data->res.dir_fattr = &data->dir_fattr;
2666 nfs_fattr_init(data->res.fattr);
2667 nfs_fattr_init(data->res.dir_fattr);
2672 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2674 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2675 &data->arg, &data->res, 1);
2677 update_changeattr(dir, &data->res.dir_cinfo);
2678 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2679 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2684 static void nfs4_free_createdata(struct nfs4_createdata *data)
2689 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2690 struct page *page, unsigned int len, struct iattr *sattr)
2692 struct nfs4_createdata *data;
2693 int status = -ENAMETOOLONG;
2695 if (len > NFS4_MAXPATHLEN)
2699 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2703 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2704 data->arg.u.symlink.pages = &page;
2705 data->arg.u.symlink.len = len;
2707 status = nfs4_do_create(dir, dentry, data);
2709 nfs4_free_createdata(data);
2714 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2715 struct page *page, unsigned int len, struct iattr *sattr)
2717 struct nfs4_exception exception = { };
2720 err = nfs4_handle_exception(NFS_SERVER(dir),
2721 _nfs4_proc_symlink(dir, dentry, page,
2724 } while (exception.retry);
2728 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2729 struct iattr *sattr)
2731 struct nfs4_createdata *data;
2732 int status = -ENOMEM;
2734 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2738 status = nfs4_do_create(dir, dentry, data);
2740 nfs4_free_createdata(data);
2745 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2746 struct iattr *sattr)
2748 struct nfs4_exception exception = { };
2751 err = nfs4_handle_exception(NFS_SERVER(dir),
2752 _nfs4_proc_mkdir(dir, dentry, sattr),
2754 } while (exception.retry);
2758 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2759 u64 cookie, struct page *page, unsigned int count, int plus)
2761 struct inode *dir = dentry->d_inode;
2762 struct nfs4_readdir_arg args = {
2767 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2769 struct nfs4_readdir_res res;
2770 struct rpc_message msg = {
2771 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2778 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2779 dentry->d_parent->d_name.name,
2780 dentry->d_name.name,
2781 (unsigned long long)cookie);
2782 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2783 res.pgbase = args.pgbase;
2784 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2786 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2788 nfs_invalidate_atime(dir);
2790 dprintk("%s: returns %d\n", __func__, status);
2794 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2795 u64 cookie, struct page *page, unsigned int count, int plus)
2797 struct nfs4_exception exception = { };
2800 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2801 _nfs4_proc_readdir(dentry, cred, cookie,
2804 } while (exception.retry);
2808 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2809 struct iattr *sattr, dev_t rdev)
2811 struct nfs4_createdata *data;
2812 int mode = sattr->ia_mode;
2813 int status = -ENOMEM;
2815 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2816 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2818 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2823 data->arg.ftype = NF4FIFO;
2824 else if (S_ISBLK(mode)) {
2825 data->arg.ftype = NF4BLK;
2826 data->arg.u.device.specdata1 = MAJOR(rdev);
2827 data->arg.u.device.specdata2 = MINOR(rdev);
2829 else if (S_ISCHR(mode)) {
2830 data->arg.ftype = NF4CHR;
2831 data->arg.u.device.specdata1 = MAJOR(rdev);
2832 data->arg.u.device.specdata2 = MINOR(rdev);
2835 status = nfs4_do_create(dir, dentry, data);
2837 nfs4_free_createdata(data);
2842 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2843 struct iattr *sattr, dev_t rdev)
2845 struct nfs4_exception exception = { };
2848 err = nfs4_handle_exception(NFS_SERVER(dir),
2849 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2851 } while (exception.retry);
2855 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2856 struct nfs_fsstat *fsstat)
2858 struct nfs4_statfs_arg args = {
2860 .bitmask = server->attr_bitmask,
2862 struct nfs4_statfs_res res = {
2865 struct rpc_message msg = {
2866 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2871 nfs_fattr_init(fsstat->fattr);
2872 return nfs4_call_sync(server, &msg, &args, &res, 0);
2875 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2877 struct nfs4_exception exception = { };
2880 err = nfs4_handle_exception(server,
2881 _nfs4_proc_statfs(server, fhandle, fsstat),
2883 } while (exception.retry);
2887 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2888 struct nfs_fsinfo *fsinfo)
2890 struct nfs4_fsinfo_arg args = {
2892 .bitmask = server->attr_bitmask,
2894 struct nfs4_fsinfo_res res = {
2897 struct rpc_message msg = {
2898 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2903 return nfs4_call_sync(server, &msg, &args, &res, 0);
2906 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2908 struct nfs4_exception exception = { };
2912 err = nfs4_handle_exception(server,
2913 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2915 } while (exception.retry);
2919 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2921 nfs_fattr_init(fsinfo->fattr);
2922 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2925 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2926 struct nfs_pathconf *pathconf)
2928 struct nfs4_pathconf_arg args = {
2930 .bitmask = server->attr_bitmask,
2932 struct nfs4_pathconf_res res = {
2933 .pathconf = pathconf,
2935 struct rpc_message msg = {
2936 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2941 /* None of the pathconf attributes are mandatory to implement */
2942 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2943 memset(pathconf, 0, sizeof(*pathconf));
2947 nfs_fattr_init(pathconf->fattr);
2948 return nfs4_call_sync(server, &msg, &args, &res, 0);
2951 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2952 struct nfs_pathconf *pathconf)
2954 struct nfs4_exception exception = { };
2958 err = nfs4_handle_exception(server,
2959 _nfs4_proc_pathconf(server, fhandle, pathconf),
2961 } while (exception.retry);
2965 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2967 struct nfs_server *server = NFS_SERVER(data->inode);
2969 dprintk("--> %s\n", __func__);
2971 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2973 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
2974 nfs_restart_rpc(task, server->nfs_client);
2978 nfs_invalidate_atime(data->inode);
2979 if (task->tk_status > 0)
2980 renew_lease(server, data->timestamp);
2984 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2986 data->timestamp = jiffies;
2987 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2990 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2992 struct inode *inode = data->inode;
2994 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2997 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
2998 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3001 if (task->tk_status >= 0) {
3002 renew_lease(NFS_SERVER(inode), data->timestamp);
3003 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3008 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3010 struct nfs_server *server = NFS_SERVER(data->inode);
3012 data->args.bitmask = server->cache_consistency_bitmask;
3013 data->res.server = server;
3014 data->timestamp = jiffies;
3016 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3019 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3021 struct inode *inode = data->inode;
3023 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3025 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3026 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3029 nfs_refresh_inode(inode, data->res.fattr);
3033 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3035 struct nfs_server *server = NFS_SERVER(data->inode);
3037 data->args.bitmask = server->cache_consistency_bitmask;
3038 data->res.server = server;
3039 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3043 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3044 * standalone procedure for queueing an asynchronous RENEW.
3046 static void nfs4_renew_done(struct rpc_task *task, void *data)
3048 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
3049 unsigned long timestamp = (unsigned long)data;
3051 if (task->tk_status < 0) {
3052 /* Unless we're shutting down, schedule state recovery! */
3053 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3054 nfs4_schedule_state_recovery(clp);
3057 spin_lock(&clp->cl_lock);
3058 if (time_before(clp->cl_last_renewal,timestamp))
3059 clp->cl_last_renewal = timestamp;
3060 spin_unlock(&clp->cl_lock);
3063 static const struct rpc_call_ops nfs4_renew_ops = {
3064 .rpc_call_done = nfs4_renew_done,
3067 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3069 struct rpc_message msg = {
3070 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3075 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3076 &nfs4_renew_ops, (void *)jiffies);
3079 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3081 struct rpc_message msg = {
3082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3086 unsigned long now = jiffies;
3089 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3092 spin_lock(&clp->cl_lock);
3093 if (time_before(clp->cl_last_renewal,now))
3094 clp->cl_last_renewal = now;
3095 spin_unlock(&clp->cl_lock);
3099 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3101 return (server->caps & NFS_CAP_ACLS)
3102 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3103 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3106 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3107 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3110 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3112 static void buf_to_pages(const void *buf, size_t buflen,
3113 struct page **pages, unsigned int *pgbase)
3115 const void *p = buf;
3117 *pgbase = offset_in_page(buf);
3119 while (p < buf + buflen) {
3120 *(pages++) = virt_to_page(p);
3121 p += PAGE_CACHE_SIZE;
3125 struct nfs4_cached_acl {
3131 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3133 struct nfs_inode *nfsi = NFS_I(inode);
3135 spin_lock(&inode->i_lock);
3136 kfree(nfsi->nfs4_acl);
3137 nfsi->nfs4_acl = acl;
3138 spin_unlock(&inode->i_lock);
3141 static void nfs4_zap_acl_attr(struct inode *inode)
3143 nfs4_set_cached_acl(inode, NULL);
3146 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3148 struct nfs_inode *nfsi = NFS_I(inode);
3149 struct nfs4_cached_acl *acl;
3152 spin_lock(&inode->i_lock);
3153 acl = nfsi->nfs4_acl;
3156 if (buf == NULL) /* user is just asking for length */
3158 if (acl->cached == 0)
3160 ret = -ERANGE; /* see getxattr(2) man page */
3161 if (acl->len > buflen)
3163 memcpy(buf, acl->data, acl->len);
3167 spin_unlock(&inode->i_lock);
3171 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3173 struct nfs4_cached_acl *acl;
3175 if (buf && acl_len <= PAGE_SIZE) {
3176 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3180 memcpy(acl->data, buf, acl_len);
3182 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3189 nfs4_set_cached_acl(inode, acl);
3192 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3194 struct page *pages[NFS4ACL_MAXPAGES];
3195 struct nfs_getaclargs args = {
3196 .fh = NFS_FH(inode),
3200 struct nfs_getaclres res = {
3204 struct rpc_message msg = {
3205 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3209 struct page *localpage = NULL;
3212 if (buflen < PAGE_SIZE) {
3213 /* As long as we're doing a round trip to the server anyway,
3214 * let's be prepared for a page of acl data. */
3215 localpage = alloc_page(GFP_KERNEL);
3216 resp_buf = page_address(localpage);
3217 if (localpage == NULL)
3219 args.acl_pages[0] = localpage;
3220 args.acl_pgbase = 0;
3221 args.acl_len = PAGE_SIZE;
3224 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3226 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3229 if (res.acl_len > args.acl_len)
3230 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3232 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3235 if (res.acl_len > buflen)
3238 memcpy(buf, resp_buf, res.acl_len);
3243 __free_page(localpage);
3247 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3249 struct nfs4_exception exception = { };
3252 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3255 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3256 } while (exception.retry);
3260 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3262 struct nfs_server *server = NFS_SERVER(inode);
3265 if (!nfs4_server_supports_acls(server))
3267 ret = nfs_revalidate_inode(server, inode);
3270 ret = nfs4_read_cached_acl(inode, buf, buflen);
3273 return nfs4_get_acl_uncached(inode, buf, buflen);
3276 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3278 struct nfs_server *server = NFS_SERVER(inode);
3279 struct page *pages[NFS4ACL_MAXPAGES];
3280 struct nfs_setaclargs arg = {
3281 .fh = NFS_FH(inode),
3285 struct nfs_setaclres res;
3286 struct rpc_message msg = {
3287 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3293 if (!nfs4_server_supports_acls(server))
3295 nfs_inode_return_delegation(inode);
3296 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3297 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3298 nfs_access_zap_cache(inode);
3299 nfs_zap_acl_cache(inode);
3303 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3305 struct nfs4_exception exception = { };
3308 err = nfs4_handle_exception(NFS_SERVER(inode),
3309 __nfs4_proc_set_acl(inode, buf, buflen),
3311 } while (exception.retry);
3316 _nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
3318 if (!clp || task->tk_status >= 0)
3320 switch(task->tk_status) {
3321 case -NFS4ERR_ADMIN_REVOKED:
3322 case -NFS4ERR_BAD_STATEID:
3323 case -NFS4ERR_OPENMODE:
3326 nfs4_state_mark_reclaim_nograce(clp, state);
3327 case -NFS4ERR_STALE_CLIENTID:
3328 case -NFS4ERR_STALE_STATEID:
3329 case -NFS4ERR_EXPIRED:
3330 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3331 nfs4_schedule_state_recovery(clp);
3332 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3333 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3334 task->tk_status = 0;
3336 #if defined(CONFIG_NFS_V4_1)
3337 case -NFS4ERR_BADSESSION:
3338 case -NFS4ERR_BADSLOT:
3339 case -NFS4ERR_BAD_HIGH_SLOT:
3340 case -NFS4ERR_DEADSESSION:
3341 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3342 case -NFS4ERR_SEQ_FALSE_RETRY:
3343 case -NFS4ERR_SEQ_MISORDERED:
3344 dprintk("%s ERROR %d, Reset session\n", __func__,
3346 nfs4_schedule_state_recovery(clp);
3347 task->tk_status = 0;
3349 #endif /* CONFIG_NFS_V4_1 */
3350 case -NFS4ERR_DELAY:
3352 nfs_inc_server_stats(server, NFSIOS_DELAY);
3353 case -NFS4ERR_GRACE:
3354 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3355 task->tk_status = 0;
3357 case -NFS4ERR_OLD_STATEID:
3358 task->tk_status = 0;
3361 task->tk_status = nfs4_map_errors(task->tk_status);
3366 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3368 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3371 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
3373 nfs4_verifier sc_verifier;
3374 struct nfs4_setclientid setclientid = {
3375 .sc_verifier = &sc_verifier,
3378 struct rpc_message msg = {
3379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3380 .rpc_argp = &setclientid,
3388 p = (__be32*)sc_verifier.data;
3389 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3390 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3393 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3394 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3396 rpc_peeraddr2str(clp->cl_rpcclient,
3398 rpc_peeraddr2str(clp->cl_rpcclient,
3400 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3401 clp->cl_id_uniquifier);
3402 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3403 sizeof(setclientid.sc_netid),
3404 rpc_peeraddr2str(clp->cl_rpcclient,
3405 RPC_DISPLAY_NETID));
3406 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3407 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3408 clp->cl_ipaddr, port >> 8, port & 255);
3410 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3411 if (status != -NFS4ERR_CLID_INUSE)
3416 ssleep(clp->cl_lease_time + 1);
3418 if (++clp->cl_id_uniquifier == 0)
3424 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3426 struct nfs_fsinfo fsinfo;
3427 struct rpc_message msg = {
3428 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3430 .rpc_resp = &fsinfo,
3437 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3439 spin_lock(&clp->cl_lock);
3440 clp->cl_lease_time = fsinfo.lease_time * HZ;
3441 clp->cl_last_renewal = now;
3442 spin_unlock(&clp->cl_lock);
3447 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3452 err = _nfs4_proc_setclientid_confirm(clp, cred);
3456 case -NFS4ERR_RESOURCE:
3457 /* The IBM lawyers misread another document! */
3458 case -NFS4ERR_DELAY:
3459 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3465 struct nfs4_delegreturndata {
3466 struct nfs4_delegreturnargs args;
3467 struct nfs4_delegreturnres res;
3469 nfs4_stateid stateid;
3470 unsigned long timestamp;
3471 struct nfs_fattr fattr;
3475 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3477 struct nfs4_delegreturndata *data = calldata;
3479 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3482 data->rpc_status = task->tk_status;
3483 if (data->rpc_status == 0)
3484 renew_lease(data->res.server, data->timestamp);
3487 static void nfs4_delegreturn_release(void *calldata)
3492 #if defined(CONFIG_NFS_V4_1)
3493 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3495 struct nfs4_delegreturndata *d_data;
3497 d_data = (struct nfs4_delegreturndata *)data;
3499 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3500 &d_data->args.seq_args,
3501 &d_data->res.seq_res, 1, task))
3503 rpc_call_start(task);
3505 #endif /* CONFIG_NFS_V4_1 */
3507 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3508 #if defined(CONFIG_NFS_V4_1)
3509 .rpc_call_prepare = nfs4_delegreturn_prepare,
3510 #endif /* CONFIG_NFS_V4_1 */
3511 .rpc_call_done = nfs4_delegreturn_done,
3512 .rpc_release = nfs4_delegreturn_release,
3515 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3517 struct nfs4_delegreturndata *data;
3518 struct nfs_server *server = NFS_SERVER(inode);
3519 struct rpc_task *task;
3520 struct rpc_message msg = {
3521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3524 struct rpc_task_setup task_setup_data = {
3525 .rpc_client = server->client,
3526 .rpc_message = &msg,
3527 .callback_ops = &nfs4_delegreturn_ops,
3528 .flags = RPC_TASK_ASYNC,
3532 data = kzalloc(sizeof(*data), GFP_KERNEL);
3535 data->args.fhandle = &data->fh;
3536 data->args.stateid = &data->stateid;
3537 data->args.bitmask = server->attr_bitmask;
3538 nfs_copy_fh(&data->fh, NFS_FH(inode));
3539 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3540 data->res.fattr = &data->fattr;
3541 data->res.server = server;
3542 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3543 nfs_fattr_init(data->res.fattr);
3544 data->timestamp = jiffies;
3545 data->rpc_status = 0;
3547 task_setup_data.callback_data = data;
3548 msg.rpc_argp = &data->args,
3549 msg.rpc_resp = &data->res,
3550 task = rpc_run_task(&task_setup_data);
3552 return PTR_ERR(task);
3555 status = nfs4_wait_for_completion_rpc_task(task);
3558 status = data->rpc_status;
3561 nfs_refresh_inode(inode, &data->fattr);
3567 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3569 struct nfs_server *server = NFS_SERVER(inode);
3570 struct nfs4_exception exception = { };
3573 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3575 case -NFS4ERR_STALE_STATEID:
3576 case -NFS4ERR_EXPIRED:
3580 err = nfs4_handle_exception(server, err, &exception);
3581 } while (exception.retry);
3585 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3586 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3589 * sleep, with exponential backoff, and retry the LOCK operation.
3591 static unsigned long
3592 nfs4_set_lock_task_retry(unsigned long timeout)
3594 schedule_timeout_killable(timeout);
3596 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3597 return NFS4_LOCK_MAXTIMEOUT;
3601 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3603 struct inode *inode = state->inode;
3604 struct nfs_server *server = NFS_SERVER(inode);
3605 struct nfs_client *clp = server->nfs_client;
3606 struct nfs_lockt_args arg = {
3607 .fh = NFS_FH(inode),
3610 struct nfs_lockt_res res = {
3613 struct rpc_message msg = {
3614 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3617 .rpc_cred = state->owner->so_cred,
3619 struct nfs4_lock_state *lsp;
3622 arg.lock_owner.clientid = clp->cl_clientid;
3623 status = nfs4_set_lock_state(state, request);
3626 lsp = request->fl_u.nfs4_fl.owner;
3627 arg.lock_owner.id = lsp->ls_id.id;
3628 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3631 request->fl_type = F_UNLCK;
3633 case -NFS4ERR_DENIED:
3636 request->fl_ops->fl_release_private(request);
3641 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3643 struct nfs4_exception exception = { };
3647 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3648 _nfs4_proc_getlk(state, cmd, request),
3650 } while (exception.retry);
3654 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3657 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3659 res = posix_lock_file_wait(file, fl);
3662 res = flock_lock_file_wait(file, fl);
3670 struct nfs4_unlockdata {
3671 struct nfs_locku_args arg;
3672 struct nfs_locku_res res;
3673 struct nfs4_lock_state *lsp;
3674 struct nfs_open_context *ctx;
3675 struct file_lock fl;
3676 const struct nfs_server *server;
3677 unsigned long timestamp;
3680 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3681 struct nfs_open_context *ctx,
3682 struct nfs4_lock_state *lsp,
3683 struct nfs_seqid *seqid)
3685 struct nfs4_unlockdata *p;
3686 struct inode *inode = lsp->ls_state->inode;
3688 p = kzalloc(sizeof(*p), GFP_KERNEL);
3691 p->arg.fh = NFS_FH(inode);
3693 p->arg.seqid = seqid;
3694 p->res.seqid = seqid;
3695 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3696 p->arg.stateid = &lsp->ls_stateid;
3698 atomic_inc(&lsp->ls_count);
3699 /* Ensure we don't close file until we're done freeing locks! */
3700 p->ctx = get_nfs_open_context(ctx);
3701 memcpy(&p->fl, fl, sizeof(p->fl));
3702 p->server = NFS_SERVER(inode);
3706 static void nfs4_locku_release_calldata(void *data)
3708 struct nfs4_unlockdata *calldata = data;
3709 nfs_free_seqid(calldata->arg.seqid);
3710 nfs4_put_lock_state(calldata->lsp);
3711 put_nfs_open_context(calldata->ctx);
3715 static void nfs4_locku_done(struct rpc_task *task, void *data)
3717 struct nfs4_unlockdata *calldata = data;
3719 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3721 if (RPC_ASSASSINATED(task))
3723 switch (task->tk_status) {
3725 memcpy(calldata->lsp->ls_stateid.data,
3726 calldata->res.stateid.data,
3727 sizeof(calldata->lsp->ls_stateid.data));
3728 renew_lease(calldata->server, calldata->timestamp);
3730 case -NFS4ERR_BAD_STATEID:
3731 case -NFS4ERR_OLD_STATEID:
3732 case -NFS4ERR_STALE_STATEID:
3733 case -NFS4ERR_EXPIRED:
3736 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3737 nfs_restart_rpc(task,
3738 calldata->server->nfs_client);
3742 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3744 struct nfs4_unlockdata *calldata = data;
3746 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3748 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3749 /* Note: exit _without_ running nfs4_locku_done */
3750 task->tk_action = NULL;
3753 calldata->timestamp = jiffies;
3754 if (nfs4_setup_sequence(calldata->server->nfs_client,
3755 &calldata->arg.seq_args,
3756 &calldata->res.seq_res, 1, task))
3758 rpc_call_start(task);
3761 static const struct rpc_call_ops nfs4_locku_ops = {
3762 .rpc_call_prepare = nfs4_locku_prepare,
3763 .rpc_call_done = nfs4_locku_done,
3764 .rpc_release = nfs4_locku_release_calldata,
3767 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3768 struct nfs_open_context *ctx,
3769 struct nfs4_lock_state *lsp,
3770 struct nfs_seqid *seqid)
3772 struct nfs4_unlockdata *data;
3773 struct rpc_message msg = {
3774 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3775 .rpc_cred = ctx->cred,
3777 struct rpc_task_setup task_setup_data = {
3778 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3779 .rpc_message = &msg,
3780 .callback_ops = &nfs4_locku_ops,
3781 .workqueue = nfsiod_workqueue,
3782 .flags = RPC_TASK_ASYNC,
3785 /* Ensure this is an unlock - when canceling a lock, the
3786 * canceled lock is passed in, and it won't be an unlock.
3788 fl->fl_type = F_UNLCK;
3790 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3792 nfs_free_seqid(seqid);
3793 return ERR_PTR(-ENOMEM);
3796 msg.rpc_argp = &data->arg,
3797 msg.rpc_resp = &data->res,
3798 task_setup_data.callback_data = data;
3799 return rpc_run_task(&task_setup_data);
3802 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3804 struct nfs_inode *nfsi = NFS_I(state->inode);
3805 struct nfs_seqid *seqid;
3806 struct nfs4_lock_state *lsp;
3807 struct rpc_task *task;
3809 unsigned char fl_flags = request->fl_flags;
3811 status = nfs4_set_lock_state(state, request);
3812 /* Unlock _before_ we do the RPC call */
3813 request->fl_flags |= FL_EXISTS;
3814 down_read(&nfsi->rwsem);
3815 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3816 up_read(&nfsi->rwsem);
3819 up_read(&nfsi->rwsem);
3822 /* Is this a delegated lock? */
3823 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3825 lsp = request->fl_u.nfs4_fl.owner;
3826 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3830 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3831 status = PTR_ERR(task);
3834 status = nfs4_wait_for_completion_rpc_task(task);
3837 request->fl_flags = fl_flags;
3841 struct nfs4_lockdata {
3842 struct nfs_lock_args arg;
3843 struct nfs_lock_res res;
3844 struct nfs4_lock_state *lsp;
3845 struct nfs_open_context *ctx;
3846 struct file_lock fl;
3847 unsigned long timestamp;
3850 struct nfs_server *server;
3853 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3854 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3856 struct nfs4_lockdata *p;
3857 struct inode *inode = lsp->ls_state->inode;
3858 struct nfs_server *server = NFS_SERVER(inode);
3860 p = kzalloc(sizeof(*p), GFP_KERNEL);
3864 p->arg.fh = NFS_FH(inode);
3866 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3867 if (p->arg.open_seqid == NULL)
3869 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3870 if (p->arg.lock_seqid == NULL)
3871 goto out_free_seqid;
3872 p->arg.lock_stateid = &lsp->ls_stateid;
3873 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3874 p->arg.lock_owner.id = lsp->ls_id.id;
3875 p->res.lock_seqid = p->arg.lock_seqid;
3876 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3879 atomic_inc(&lsp->ls_count);
3880 p->ctx = get_nfs_open_context(ctx);
3881 memcpy(&p->fl, fl, sizeof(p->fl));
3884 nfs_free_seqid(p->arg.open_seqid);
3890 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3892 struct nfs4_lockdata *data = calldata;
3893 struct nfs4_state *state = data->lsp->ls_state;
3895 dprintk("%s: begin!\n", __func__);
3896 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3898 /* Do we need to do an open_to_lock_owner? */
3899 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3900 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3902 data->arg.open_stateid = &state->stateid;
3903 data->arg.new_lock_owner = 1;
3904 data->res.open_seqid = data->arg.open_seqid;
3906 data->arg.new_lock_owner = 0;
3907 data->timestamp = jiffies;
3908 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3909 &data->res.seq_res, 1, task))
3911 rpc_call_start(task);
3912 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3915 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3917 struct nfs4_lockdata *data = calldata;
3919 dprintk("%s: begin!\n", __func__);
3921 nfs4_sequence_done(data->server, &data->res.seq_res,
3924 data->rpc_status = task->tk_status;
3925 if (RPC_ASSASSINATED(task))
3927 if (data->arg.new_lock_owner != 0) {
3928 if (data->rpc_status == 0)
3929 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3933 if (data->rpc_status == 0) {
3934 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3935 sizeof(data->lsp->ls_stateid.data));
3936 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3937 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3940 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3943 static void nfs4_lock_release(void *calldata)
3945 struct nfs4_lockdata *data = calldata;
3947 dprintk("%s: begin!\n", __func__);
3948 nfs_free_seqid(data->arg.open_seqid);
3949 if (data->cancelled != 0) {
3950 struct rpc_task *task;
3951 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3952 data->arg.lock_seqid);
3955 dprintk("%s: cancelling lock!\n", __func__);
3957 nfs_free_seqid(data->arg.lock_seqid);
3958 nfs4_put_lock_state(data->lsp);
3959 put_nfs_open_context(data->ctx);
3961 dprintk("%s: done!\n", __func__);
3964 static const struct rpc_call_ops nfs4_lock_ops = {
3965 .rpc_call_prepare = nfs4_lock_prepare,
3966 .rpc_call_done = nfs4_lock_done,
3967 .rpc_release = nfs4_lock_release,
3970 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3972 struct nfs4_lockdata *data;
3973 struct rpc_task *task;
3974 struct rpc_message msg = {
3975 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3976 .rpc_cred = state->owner->so_cred,
3978 struct rpc_task_setup task_setup_data = {
3979 .rpc_client = NFS_CLIENT(state->inode),
3980 .rpc_message = &msg,
3981 .callback_ops = &nfs4_lock_ops,
3982 .workqueue = nfsiod_workqueue,
3983 .flags = RPC_TASK_ASYNC,
3987 dprintk("%s: begin!\n", __func__);
3988 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3989 fl->fl_u.nfs4_fl.owner);
3993 data->arg.block = 1;
3995 data->arg.reclaim = 1;
3996 msg.rpc_argp = &data->arg,
3997 msg.rpc_resp = &data->res,
3998 task_setup_data.callback_data = data;
3999 task = rpc_run_task(&task_setup_data);
4001 return PTR_ERR(task);
4002 ret = nfs4_wait_for_completion_rpc_task(task);
4004 ret = data->rpc_status;
4006 data->cancelled = 1;
4008 dprintk("%s: done, ret = %d!\n", __func__, ret);
4012 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4014 struct nfs_server *server = NFS_SERVER(state->inode);
4015 struct nfs4_exception exception = { };
4019 /* Cache the lock if possible... */
4020 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4022 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4023 if (err != -NFS4ERR_DELAY)
4025 nfs4_handle_exception(server, err, &exception);
4026 } while (exception.retry);
4030 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4032 struct nfs_server *server = NFS_SERVER(state->inode);
4033 struct nfs4_exception exception = { };
4036 err = nfs4_set_lock_state(state, request);
4040 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4042 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4046 case -NFS4ERR_GRACE:
4047 case -NFS4ERR_DELAY:
4048 nfs4_handle_exception(server, err, &exception);
4051 } while (exception.retry);
4056 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4058 struct nfs_inode *nfsi = NFS_I(state->inode);
4059 unsigned char fl_flags = request->fl_flags;
4062 /* Is this a delegated open? */
4063 status = nfs4_set_lock_state(state, request);
4066 request->fl_flags |= FL_ACCESS;
4067 status = do_vfs_lock(request->fl_file, request);
4070 down_read(&nfsi->rwsem);
4071 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4072 /* Yes: cache locks! */
4073 /* ...but avoid races with delegation recall... */
4074 request->fl_flags = fl_flags & ~FL_SLEEP;
4075 status = do_vfs_lock(request->fl_file, request);
4078 status = _nfs4_do_setlk(state, cmd, request, 0);
4081 /* Note: we always want to sleep here! */
4082 request->fl_flags = fl_flags | FL_SLEEP;
4083 if (do_vfs_lock(request->fl_file, request) < 0)
4084 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4086 up_read(&nfsi->rwsem);
4088 request->fl_flags = fl_flags;
4092 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4094 struct nfs4_exception exception = { };
4098 err = _nfs4_proc_setlk(state, cmd, request);
4099 if (err == -NFS4ERR_DENIED)
4101 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4103 } while (exception.retry);
4108 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4110 struct nfs_open_context *ctx;
4111 struct nfs4_state *state;
4112 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4115 /* verify open state */
4116 ctx = nfs_file_open_context(filp);
4119 if (request->fl_start < 0 || request->fl_end < 0)
4122 if (IS_GETLK(cmd)) {
4124 return nfs4_proc_getlk(state, F_GETLK, request);
4128 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4131 if (request->fl_type == F_UNLCK) {
4133 return nfs4_proc_unlck(state, cmd, request);
4140 status = nfs4_proc_setlk(state, cmd, request);
4141 if ((status != -EAGAIN) || IS_SETLK(cmd))
4143 timeout = nfs4_set_lock_task_retry(timeout);
4144 status = -ERESTARTSYS;
4147 } while(status < 0);
4151 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4153 struct nfs_server *server = NFS_SERVER(state->inode);
4154 struct nfs4_exception exception = { };
4157 err = nfs4_set_lock_state(state, fl);
4161 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
4164 printk(KERN_ERR "%s: unhandled error %d.\n",
4169 case -NFS4ERR_EXPIRED:
4170 case -NFS4ERR_STALE_CLIENTID:
4171 case -NFS4ERR_STALE_STATEID:
4172 nfs4_schedule_state_recovery(server->nfs_client);
4176 * The show must go on: exit, but mark the
4177 * stateid as needing recovery.
4179 case -NFS4ERR_ADMIN_REVOKED:
4180 case -NFS4ERR_BAD_STATEID:
4181 case -NFS4ERR_OPENMODE:
4182 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4186 case -NFS4ERR_DENIED:
4187 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4190 case -NFS4ERR_DELAY:
4193 err = nfs4_handle_exception(server, err, &exception);
4194 } while (exception.retry);
4199 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4201 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4202 size_t buflen, int flags)
4204 struct inode *inode = dentry->d_inode;
4206 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4209 return nfs4_proc_set_acl(inode, buf, buflen);
4212 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4213 * and that's what we'll do for e.g. user attributes that haven't been set.
4214 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4215 * attributes in kernel-managed attribute namespaces. */
4216 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4219 struct inode *inode = dentry->d_inode;
4221 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4224 return nfs4_proc_get_acl(inode, buf, buflen);
4227 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4229 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
4231 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4233 if (buf && buflen < len)
4236 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4240 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4242 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4243 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4244 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4247 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4248 NFS_ATTR_FATTR_NLINK;
4249 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4253 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4254 struct nfs4_fs_locations *fs_locations, struct page *page)
4256 struct nfs_server *server = NFS_SERVER(dir);
4258 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4259 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4261 struct nfs4_fs_locations_arg args = {
4262 .dir_fh = NFS_FH(dir),
4267 struct nfs4_fs_locations_res res = {
4268 .fs_locations = fs_locations,
4270 struct rpc_message msg = {
4271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4277 dprintk("%s: start\n", __func__);
4278 nfs_fattr_init(&fs_locations->fattr);
4279 fs_locations->server = server;
4280 fs_locations->nlocations = 0;
4281 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4282 nfs_fixup_referral_attributes(&fs_locations->fattr);
4283 dprintk("%s: returned status = %d\n", __func__, status);
4287 #ifdef CONFIG_NFS_V4_1
4289 * nfs4_proc_exchange_id()
4291 * Since the clientid has expired, all compounds using sessions
4292 * associated with the stale clientid will be returning
4293 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4294 * be in some phase of session reset.
4296 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4298 nfs4_verifier verifier;
4299 struct nfs41_exchange_id_args args = {
4301 .flags = clp->cl_exchange_flags,
4303 struct nfs41_exchange_id_res res = {
4307 struct rpc_message msg = {
4308 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4315 dprintk("--> %s\n", __func__);
4316 BUG_ON(clp == NULL);
4318 /* Remove server-only flags */
4319 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4321 p = (u32 *)verifier.data;
4322 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4323 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4324 args.verifier = &verifier;
4327 args.id_len = scnprintf(args.id, sizeof(args.id),
4330 rpc_peeraddr2str(clp->cl_rpcclient,
4332 clp->cl_id_uniquifier);
4334 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4336 if (status != NFS4ERR_CLID_INUSE)
4342 if (++clp->cl_id_uniquifier == 0)
4346 dprintk("<-- %s status= %d\n", __func__, status);
4350 struct nfs4_get_lease_time_data {
4351 struct nfs4_get_lease_time_args *args;
4352 struct nfs4_get_lease_time_res *res;
4353 struct nfs_client *clp;
4356 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4360 struct nfs4_get_lease_time_data *data =
4361 (struct nfs4_get_lease_time_data *)calldata;
4363 dprintk("--> %s\n", __func__);
4364 /* just setup sequence, do not trigger session recovery
4365 since we're invoked within one */
4366 ret = nfs41_setup_sequence(data->clp->cl_session,
4367 &data->args->la_seq_args,
4368 &data->res->lr_seq_res, 0, task);
4370 BUG_ON(ret == -EAGAIN);
4371 rpc_call_start(task);
4372 dprintk("<-- %s\n", __func__);
4376 * Called from nfs4_state_manager thread for session setup, so don't recover
4377 * from sequence operation or clientid errors.
4379 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4381 struct nfs4_get_lease_time_data *data =
4382 (struct nfs4_get_lease_time_data *)calldata;
4384 dprintk("--> %s\n", __func__);
4385 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4386 switch (task->tk_status) {
4387 case -NFS4ERR_DELAY:
4388 case -NFS4ERR_GRACE:
4389 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4390 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4391 task->tk_status = 0;
4392 nfs_restart_rpc(task, data->clp);
4395 dprintk("<-- %s\n", __func__);
4398 struct rpc_call_ops nfs4_get_lease_time_ops = {
4399 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4400 .rpc_call_done = nfs4_get_lease_time_done,
4403 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4405 struct rpc_task *task;
4406 struct nfs4_get_lease_time_args args;
4407 struct nfs4_get_lease_time_res res = {
4408 .lr_fsinfo = fsinfo,
4410 struct nfs4_get_lease_time_data data = {
4415 struct rpc_message msg = {
4416 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4420 struct rpc_task_setup task_setup = {
4421 .rpc_client = clp->cl_rpcclient,
4422 .rpc_message = &msg,
4423 .callback_ops = &nfs4_get_lease_time_ops,
4424 .callback_data = &data
4428 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4429 dprintk("--> %s\n", __func__);
4430 task = rpc_run_task(&task_setup);
4433 status = PTR_ERR(task);
4435 status = task->tk_status;
4438 dprintk("<-- %s return %d\n", __func__, status);
4444 * Reset a slot table
4446 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4447 int old_max_slots, int ivalue)
4452 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
4455 * Until we have dynamic slot table adjustment, insist
4456 * upon the same slot table size
4458 if (max_slots != old_max_slots) {
4459 dprintk("%s reset slot table does't match old\n",
4461 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4464 spin_lock(&tbl->slot_tbl_lock);
4465 for (i = 0; i < max_slots; ++i)
4466 tbl->slots[i].seq_nr = ivalue;
4467 spin_unlock(&tbl->slot_tbl_lock);
4468 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4469 tbl, tbl->slots, tbl->max_slots);
4471 dprintk("<-- %s: return %d\n", __func__, ret);
4476 * Reset the forechannel and backchannel slot tables
4478 static int nfs4_reset_slot_tables(struct nfs4_session *session)
4482 status = nfs4_reset_slot_table(&session->fc_slot_table,
4483 session->fc_attrs.max_reqs,
4484 session->fc_slot_table.max_slots,
4489 status = nfs4_reset_slot_table(&session->bc_slot_table,
4490 session->bc_attrs.max_reqs,
4491 session->bc_slot_table.max_slots,
4496 /* Destroy the slot table */
4497 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4499 if (session->fc_slot_table.slots != NULL) {
4500 kfree(session->fc_slot_table.slots);
4501 session->fc_slot_table.slots = NULL;
4503 if (session->bc_slot_table.slots != NULL) {
4504 kfree(session->bc_slot_table.slots);
4505 session->bc_slot_table.slots = NULL;
4511 * Initialize slot table
4513 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4514 int max_slots, int ivalue)
4516 struct nfs4_slot *slot;
4519 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4521 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4523 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4528 spin_lock(&tbl->slot_tbl_lock);
4529 tbl->max_slots = max_slots;
4531 tbl->highest_used_slotid = -1; /* no slot is currently used */
4532 spin_unlock(&tbl->slot_tbl_lock);
4533 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4534 tbl, tbl->slots, tbl->max_slots);
4536 dprintk("<-- %s: return %d\n", __func__, ret);
4541 * Initialize the forechannel and backchannel tables
4543 static int nfs4_init_slot_tables(struct nfs4_session *session)
4545 struct nfs4_slot_table *tbl;
4548 tbl = &session->fc_slot_table;
4549 if (tbl->slots == NULL) {
4550 status = nfs4_init_slot_table(tbl,
4551 session->fc_attrs.max_reqs, 1);
4556 tbl = &session->bc_slot_table;
4557 if (tbl->slots == NULL) {
4558 status = nfs4_init_slot_table(tbl,
4559 session->bc_attrs.max_reqs, 0);
4561 nfs4_destroy_slot_tables(session);
4567 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4569 struct nfs4_session *session;
4570 struct nfs4_slot_table *tbl;
4572 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4577 * The create session reply races with the server back
4578 * channel probe. Mark the client NFS_CS_SESSION_INITING
4579 * so that the client back channel can find the
4582 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4583 init_completion(&session->complete);
4585 tbl = &session->fc_slot_table;
4586 tbl->highest_used_slotid = -1;
4587 spin_lock_init(&tbl->slot_tbl_lock);
4588 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4590 tbl = &session->bc_slot_table;
4591 tbl->highest_used_slotid = -1;
4592 spin_lock_init(&tbl->slot_tbl_lock);
4593 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4599 void nfs4_destroy_session(struct nfs4_session *session)
4601 nfs4_proc_destroy_session(session);
4602 dprintk("%s Destroy backchannel for xprt %p\n",
4603 __func__, session->clp->cl_rpcclient->cl_xprt);
4604 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4605 NFS41_BC_MIN_CALLBACKS);
4606 nfs4_destroy_slot_tables(session);
4611 * Initialize the values to be used by the client in CREATE_SESSION
4612 * If nfs4_init_session set the fore channel request and response sizes,
4615 * Set the back channel max_resp_sz_cached to zero to force the client to
4616 * always set csa_cachethis to FALSE because the current implementation
4617 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4619 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4621 struct nfs4_session *session = args->client->cl_session;
4622 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4623 mxresp_sz = session->fc_attrs.max_resp_sz;
4626 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4628 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4629 /* Fore channel attributes */
4630 args->fc_attrs.headerpadsz = 0;
4631 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4632 args->fc_attrs.max_resp_sz = mxresp_sz;
4633 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4634 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4635 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4637 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4638 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4640 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4641 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4642 args->fc_attrs.max_reqs);
4644 /* Back channel attributes */
4645 args->bc_attrs.headerpadsz = 0;
4646 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4647 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4648 args->bc_attrs.max_resp_sz_cached = 0;
4649 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4650 args->bc_attrs.max_reqs = 1;
4652 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4653 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4655 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4656 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4657 args->bc_attrs.max_reqs);
4660 static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4664 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4665 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4669 #define _verify_fore_channel_attr(_name_) \
4670 _verify_channel_attr("fore", #_name_, \
4671 args->fc_attrs._name_, \
4672 session->fc_attrs._name_)
4674 #define _verify_back_channel_attr(_name_) \
4675 _verify_channel_attr("back", #_name_, \
4676 args->bc_attrs._name_, \
4677 session->bc_attrs._name_)
4680 * The server is not allowed to increase the fore channel header pad size,
4681 * maximum response size, or maximum number of operations.
4683 * The back channel attributes are only negotiatied down: We send what the
4684 * (back channel) server insists upon.
4686 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4687 struct nfs4_session *session)
4691 ret |= _verify_fore_channel_attr(headerpadsz);
4692 ret |= _verify_fore_channel_attr(max_resp_sz);
4693 ret |= _verify_fore_channel_attr(max_ops);
4695 ret |= _verify_back_channel_attr(headerpadsz);
4696 ret |= _verify_back_channel_attr(max_rqst_sz);
4697 ret |= _verify_back_channel_attr(max_resp_sz);
4698 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4699 ret |= _verify_back_channel_attr(max_ops);
4700 ret |= _verify_back_channel_attr(max_reqs);
4705 static int _nfs4_proc_create_session(struct nfs_client *clp)
4707 struct nfs4_session *session = clp->cl_session;
4708 struct nfs41_create_session_args args = {
4710 .cb_program = NFS4_CALLBACK,
4712 struct nfs41_create_session_res res = {
4715 struct rpc_message msg = {
4716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4722 nfs4_init_channel_attrs(&args);
4723 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
4725 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4728 /* Verify the session's negotiated channel_attrs values */
4729 status = nfs4_verify_channel_attrs(&args, session);
4731 /* Increment the clientid slot sequence id */
4739 * Issues a CREATE_SESSION operation to the server.
4740 * It is the responsibility of the caller to verify the session is
4741 * expired before calling this routine.
4743 int nfs4_proc_create_session(struct nfs_client *clp)
4747 struct nfs4_session *session = clp->cl_session;
4749 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4751 status = _nfs4_proc_create_session(clp);
4755 /* Init and reset the fore channel */
4756 status = nfs4_init_slot_tables(session);
4757 dprintk("slot table initialization returned %d\n", status);
4760 status = nfs4_reset_slot_tables(session);
4761 dprintk("slot table reset returned %d\n", status);
4765 ptr = (unsigned *)&session->sess_id.data[0];
4766 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4767 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4769 dprintk("<-- %s\n", __func__);
4774 * Issue the over-the-wire RPC DESTROY_SESSION.
4775 * The caller must serialize access to this routine.
4777 int nfs4_proc_destroy_session(struct nfs4_session *session)
4780 struct rpc_message msg;
4782 dprintk("--> nfs4_proc_destroy_session\n");
4784 /* session is still being setup */
4785 if (session->clp->cl_cons_state != NFS_CS_READY)
4788 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4789 msg.rpc_argp = session;
4790 msg.rpc_resp = NULL;
4791 msg.rpc_cred = NULL;
4792 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4796 "Got error %d from the server on DESTROY_SESSION. "
4797 "Session has been destroyed regardless...\n", status);
4799 dprintk("<-- nfs4_proc_destroy_session\n");
4803 int nfs4_init_session(struct nfs_server *server)
4805 struct nfs_client *clp = server->nfs_client;
4806 struct nfs4_session *session;
4809 if (!nfs4_has_session(clp))
4812 session = clp->cl_session;
4813 session->fc_attrs.max_rqst_sz = server->wsize + nfs41_maxwrite_overhead;
4814 session->fc_attrs.max_resp_sz = server->rsize + nfs41_maxread_overhead;
4816 ret = nfs4_recover_expired_lease(server);
4818 ret = nfs4_check_client_ready(clp);
4823 * Renew the cl_session lease.
4825 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4827 struct nfs4_sequence_args args;
4828 struct nfs4_sequence_res res;
4830 struct rpc_message msg = {
4831 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4837 args.sa_cache_this = 0;
4839 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4843 void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4845 struct nfs_client *clp = (struct nfs_client *)data;
4847 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4849 if (task->tk_status < 0) {
4850 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4852 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4854 nfs_restart_rpc(task, clp);
4858 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4860 kfree(task->tk_msg.rpc_argp);
4861 kfree(task->tk_msg.rpc_resp);
4863 dprintk("<-- %s\n", __func__);
4866 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4868 struct nfs_client *clp;
4869 struct nfs4_sequence_args *args;
4870 struct nfs4_sequence_res *res;
4872 clp = (struct nfs_client *)data;
4873 args = task->tk_msg.rpc_argp;
4874 res = task->tk_msg.rpc_resp;
4876 if (nfs4_setup_sequence(clp, args, res, 0, task))
4878 rpc_call_start(task);
4881 static const struct rpc_call_ops nfs41_sequence_ops = {
4882 .rpc_call_done = nfs41_sequence_call_done,
4883 .rpc_call_prepare = nfs41_sequence_prepare,
4886 static int nfs41_proc_async_sequence(struct nfs_client *clp,
4887 struct rpc_cred *cred)
4889 struct nfs4_sequence_args *args;
4890 struct nfs4_sequence_res *res;
4891 struct rpc_message msg = {
4892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4896 args = kzalloc(sizeof(*args), GFP_KERNEL);
4899 res = kzalloc(sizeof(*res), GFP_KERNEL);
4904 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4905 msg.rpc_argp = args;
4908 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4909 &nfs41_sequence_ops, (void *)clp);
4912 struct nfs4_reclaim_complete_data {
4913 struct nfs_client *clp;
4914 struct nfs41_reclaim_complete_args arg;
4915 struct nfs41_reclaim_complete_res res;
4918 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
4920 struct nfs4_reclaim_complete_data *calldata = data;
4922 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
4923 &calldata->res.seq_res, 0, task))
4926 rpc_call_start(task);
4929 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
4931 struct nfs4_reclaim_complete_data *calldata = data;
4932 struct nfs_client *clp = calldata->clp;
4933 struct nfs4_sequence_res *res = &calldata->res.seq_res;
4935 dprintk("--> %s\n", __func__);
4936 nfs41_sequence_done(clp, res, task->tk_status);
4937 switch (task->tk_status) {
4939 case -NFS4ERR_COMPLETE_ALREADY:
4941 case -NFS4ERR_BADSESSION:
4942 case -NFS4ERR_DEADSESSION:
4944 * Handle the session error, but do not retry the operation, as
4945 * we have no way of telling whether the clientid had to be
4946 * reset before we got our reply. If reset, a new wave of
4947 * reclaim operations will follow, containing their own reclaim
4948 * complete. We don't want our retry to get on the way of
4949 * recovery by incorrectly indicating to the server that we're
4950 * done reclaiming state since the process had to be restarted.
4952 _nfs4_async_handle_error(task, NULL, clp, NULL);
4955 if (_nfs4_async_handle_error(
4956 task, NULL, clp, NULL) == -EAGAIN) {
4957 rpc_restart_call_prepare(task);
4962 dprintk("<-- %s\n", __func__);
4965 static void nfs4_free_reclaim_complete_data(void *data)
4967 struct nfs4_reclaim_complete_data *calldata = data;
4972 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
4973 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
4974 .rpc_call_done = nfs4_reclaim_complete_done,
4975 .rpc_release = nfs4_free_reclaim_complete_data,
4979 * Issue a global reclaim complete.
4981 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
4983 struct nfs4_reclaim_complete_data *calldata;
4984 struct rpc_task *task;
4985 struct rpc_message msg = {
4986 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
4988 struct rpc_task_setup task_setup_data = {
4989 .rpc_client = clp->cl_rpcclient,
4990 .rpc_message = &msg,
4991 .callback_ops = &nfs4_reclaim_complete_call_ops,
4992 .flags = RPC_TASK_ASYNC,
4994 int status = -ENOMEM;
4996 dprintk("--> %s\n", __func__);
4997 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
4998 if (calldata == NULL)
5000 calldata->clp = clp;
5001 calldata->arg.one_fs = 0;
5002 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5004 msg.rpc_argp = &calldata->arg;
5005 msg.rpc_resp = &calldata->res;
5006 task_setup_data.callback_data = calldata;
5007 task = rpc_run_task(&task_setup_data);
5009 status = PTR_ERR(task);
5012 dprintk("<-- %s status=%d\n", __func__, status);
5015 #endif /* CONFIG_NFS_V4_1 */
5017 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
5018 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5019 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5020 .recover_open = nfs4_open_reclaim,
5021 .recover_lock = nfs4_lock_reclaim,
5022 .establish_clid = nfs4_init_clientid,
5023 .get_clid_cred = nfs4_get_setclientid_cred,
5026 #if defined(CONFIG_NFS_V4_1)
5027 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5028 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5029 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5030 .recover_open = nfs4_open_reclaim,
5031 .recover_lock = nfs4_lock_reclaim,
5032 .establish_clid = nfs41_init_clientid,
5033 .get_clid_cred = nfs4_get_exchange_id_cred,
5034 .reclaim_complete = nfs41_proc_reclaim_complete,
5036 #endif /* CONFIG_NFS_V4_1 */
5038 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5039 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5040 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5041 .recover_open = nfs4_open_expired,
5042 .recover_lock = nfs4_lock_expired,
5043 .establish_clid = nfs4_init_clientid,
5044 .get_clid_cred = nfs4_get_setclientid_cred,
5047 #if defined(CONFIG_NFS_V4_1)
5048 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
5049 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5050 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5051 .recover_open = nfs4_open_expired,
5052 .recover_lock = nfs4_lock_expired,
5053 .establish_clid = nfs41_init_clientid,
5054 .get_clid_cred = nfs4_get_exchange_id_cred,
5056 #endif /* CONFIG_NFS_V4_1 */
5058 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5059 .sched_state_renewal = nfs4_proc_async_renew,
5060 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
5061 .renew_lease = nfs4_proc_renew,
5064 #if defined(CONFIG_NFS_V4_1)
5065 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5066 .sched_state_renewal = nfs41_proc_async_sequence,
5067 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
5068 .renew_lease = nfs4_proc_sequence,
5073 * Per minor version reboot and network partition recovery ops
5076 struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5077 &nfs40_reboot_recovery_ops,
5078 #if defined(CONFIG_NFS_V4_1)
5079 &nfs41_reboot_recovery_ops,
5083 struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5084 &nfs40_nograce_recovery_ops,
5085 #if defined(CONFIG_NFS_V4_1)
5086 &nfs41_nograce_recovery_ops,
5090 struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5091 &nfs40_state_renewal_ops,
5092 #if defined(CONFIG_NFS_V4_1)
5093 &nfs41_state_renewal_ops,
5097 static const struct inode_operations nfs4_file_inode_operations = {
5098 .permission = nfs_permission,
5099 .getattr = nfs_getattr,
5100 .setattr = nfs_setattr,
5101 .getxattr = nfs4_getxattr,
5102 .setxattr = nfs4_setxattr,
5103 .listxattr = nfs4_listxattr,
5106 const struct nfs_rpc_ops nfs_v4_clientops = {
5107 .version = 4, /* protocol version */
5108 .dentry_ops = &nfs4_dentry_operations,
5109 .dir_inode_ops = &nfs4_dir_inode_operations,
5110 .file_inode_ops = &nfs4_file_inode_operations,
5111 .getroot = nfs4_proc_get_root,
5112 .getattr = nfs4_proc_getattr,
5113 .setattr = nfs4_proc_setattr,
5114 .lookupfh = nfs4_proc_lookupfh,
5115 .lookup = nfs4_proc_lookup,
5116 .access = nfs4_proc_access,
5117 .readlink = nfs4_proc_readlink,
5118 .create = nfs4_proc_create,
5119 .remove = nfs4_proc_remove,
5120 .unlink_setup = nfs4_proc_unlink_setup,
5121 .unlink_done = nfs4_proc_unlink_done,
5122 .rename = nfs4_proc_rename,
5123 .link = nfs4_proc_link,
5124 .symlink = nfs4_proc_symlink,
5125 .mkdir = nfs4_proc_mkdir,
5126 .rmdir = nfs4_proc_remove,
5127 .readdir = nfs4_proc_readdir,
5128 .mknod = nfs4_proc_mknod,
5129 .statfs = nfs4_proc_statfs,
5130 .fsinfo = nfs4_proc_fsinfo,
5131 .pathconf = nfs4_proc_pathconf,
5132 .set_capabilities = nfs4_server_capabilities,
5133 .decode_dirent = nfs4_decode_dirent,
5134 .read_setup = nfs4_proc_read_setup,
5135 .read_done = nfs4_read_done,
5136 .write_setup = nfs4_proc_write_setup,
5137 .write_done = nfs4_write_done,
5138 .commit_setup = nfs4_proc_commit_setup,
5139 .commit_done = nfs4_commit_done,
5140 .lock = nfs4_proc_lock,
5141 .clear_acl_cache = nfs4_zap_acl_attr,
5142 .close_context = nfs4_close_context,