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 void nfs4_restart_rpc(struct rpc_task *task, const struct nfs_client *clp)
630 #ifdef CONFIG_NFS_V4_1
631 if (nfs4_has_session(clp)) {
632 rpc_restart_call_prepare(task);
635 #endif /* CONFIG_NFS_V4_1 */
636 rpc_restart_call(task);
639 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
641 struct nfs_inode *nfsi = NFS_I(dir);
643 spin_lock(&dir->i_lock);
644 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
645 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
646 nfs_force_lookup_revalidate(dir);
647 nfsi->change_attr = cinfo->after;
648 spin_unlock(&dir->i_lock);
651 struct nfs4_opendata {
653 struct nfs_openargs o_arg;
654 struct nfs_openres o_res;
655 struct nfs_open_confirmargs c_arg;
656 struct nfs_open_confirmres c_res;
657 struct nfs_fattr f_attr;
658 struct nfs_fattr dir_attr;
661 struct nfs4_state_owner *owner;
662 struct nfs4_state *state;
664 unsigned long timestamp;
665 unsigned int rpc_done : 1;
671 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
673 p->o_res.f_attr = &p->f_attr;
674 p->o_res.dir_attr = &p->dir_attr;
675 p->o_res.seqid = p->o_arg.seqid;
676 p->c_res.seqid = p->c_arg.seqid;
677 p->o_res.server = p->o_arg.server;
678 nfs_fattr_init(&p->f_attr);
679 nfs_fattr_init(&p->dir_attr);
680 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
683 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
684 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
685 const struct iattr *attrs)
687 struct dentry *parent = dget_parent(path->dentry);
688 struct inode *dir = parent->d_inode;
689 struct nfs_server *server = NFS_SERVER(dir);
690 struct nfs4_opendata *p;
692 p = kzalloc(sizeof(*p), GFP_KERNEL);
695 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
696 if (p->o_arg.seqid == NULL)
698 p->path.mnt = mntget(path->mnt);
699 p->path.dentry = dget(path->dentry);
702 atomic_inc(&sp->so_count);
703 p->o_arg.fh = NFS_FH(dir);
704 p->o_arg.open_flags = flags;
705 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
706 p->o_arg.clientid = server->nfs_client->cl_clientid;
707 p->o_arg.id = sp->so_owner_id.id;
708 p->o_arg.name = &p->path.dentry->d_name;
709 p->o_arg.server = server;
710 p->o_arg.bitmask = server->attr_bitmask;
711 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
712 if (flags & O_EXCL) {
713 if (nfs4_has_persistent_session(server->nfs_client)) {
715 p->o_arg.u.attrs = &p->attrs;
716 memcpy(&p->attrs, attrs, sizeof(p->attrs));
717 } else { /* EXCLUSIVE4_1 */
718 u32 *s = (u32 *) p->o_arg.u.verifier.data;
722 } else if (flags & O_CREAT) {
723 p->o_arg.u.attrs = &p->attrs;
724 memcpy(&p->attrs, attrs, sizeof(p->attrs));
726 p->c_arg.fh = &p->o_res.fh;
727 p->c_arg.stateid = &p->o_res.stateid;
728 p->c_arg.seqid = p->o_arg.seqid;
729 nfs4_init_opendata_res(p);
739 static void nfs4_opendata_free(struct kref *kref)
741 struct nfs4_opendata *p = container_of(kref,
742 struct nfs4_opendata, kref);
744 nfs_free_seqid(p->o_arg.seqid);
745 if (p->state != NULL)
746 nfs4_put_open_state(p->state);
747 nfs4_put_state_owner(p->owner);
753 static void nfs4_opendata_put(struct nfs4_opendata *p)
756 kref_put(&p->kref, nfs4_opendata_free);
759 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
763 ret = rpc_wait_for_completion_task(task);
767 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
771 if (open_mode & O_EXCL)
773 switch (mode & (FMODE_READ|FMODE_WRITE)) {
775 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
778 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
780 case FMODE_READ|FMODE_WRITE:
781 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
787 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
789 if ((delegation->type & fmode) != fmode)
791 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
793 nfs_mark_delegation_referenced(delegation);
797 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
806 case FMODE_READ|FMODE_WRITE:
809 nfs4_state_set_mode_locked(state, state->state | fmode);
812 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
814 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
815 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
816 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
819 set_bit(NFS_O_RDONLY_STATE, &state->flags);
822 set_bit(NFS_O_WRONLY_STATE, &state->flags);
824 case FMODE_READ|FMODE_WRITE:
825 set_bit(NFS_O_RDWR_STATE, &state->flags);
829 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
831 write_seqlock(&state->seqlock);
832 nfs_set_open_stateid_locked(state, stateid, fmode);
833 write_sequnlock(&state->seqlock);
836 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
839 * Protect the call to nfs4_state_set_mode_locked and
840 * serialise the stateid update
842 write_seqlock(&state->seqlock);
843 if (deleg_stateid != NULL) {
844 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
845 set_bit(NFS_DELEGATED_STATE, &state->flags);
847 if (open_stateid != NULL)
848 nfs_set_open_stateid_locked(state, open_stateid, fmode);
849 write_sequnlock(&state->seqlock);
850 spin_lock(&state->owner->so_lock);
851 update_open_stateflags(state, fmode);
852 spin_unlock(&state->owner->so_lock);
855 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
857 struct nfs_inode *nfsi = NFS_I(state->inode);
858 struct nfs_delegation *deleg_cur;
861 fmode &= (FMODE_READ|FMODE_WRITE);
864 deleg_cur = rcu_dereference(nfsi->delegation);
865 if (deleg_cur == NULL)
868 spin_lock(&deleg_cur->lock);
869 if (nfsi->delegation != deleg_cur ||
870 (deleg_cur->type & fmode) != fmode)
871 goto no_delegation_unlock;
873 if (delegation == NULL)
874 delegation = &deleg_cur->stateid;
875 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
876 goto no_delegation_unlock;
878 nfs_mark_delegation_referenced(deleg_cur);
879 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
881 no_delegation_unlock:
882 spin_unlock(&deleg_cur->lock);
886 if (!ret && open_stateid != NULL) {
887 __update_open_stateid(state, open_stateid, NULL, fmode);
895 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
897 struct nfs_delegation *delegation;
900 delegation = rcu_dereference(NFS_I(inode)->delegation);
901 if (delegation == NULL || (delegation->type & fmode) == fmode) {
906 nfs_inode_return_delegation(inode);
909 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
911 struct nfs4_state *state = opendata->state;
912 struct nfs_inode *nfsi = NFS_I(state->inode);
913 struct nfs_delegation *delegation;
914 int open_mode = opendata->o_arg.open_flags & O_EXCL;
915 fmode_t fmode = opendata->o_arg.fmode;
916 nfs4_stateid stateid;
920 if (can_open_cached(state, fmode, open_mode)) {
921 spin_lock(&state->owner->so_lock);
922 if (can_open_cached(state, fmode, open_mode)) {
923 update_open_stateflags(state, fmode);
924 spin_unlock(&state->owner->so_lock);
925 goto out_return_state;
927 spin_unlock(&state->owner->so_lock);
930 delegation = rcu_dereference(nfsi->delegation);
931 if (delegation == NULL ||
932 !can_open_delegated(delegation, fmode)) {
936 /* Save the delegation */
937 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
939 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
944 /* Try to update the stateid using the delegation */
945 if (update_open_stateid(state, NULL, &stateid, fmode))
946 goto out_return_state;
951 atomic_inc(&state->count);
955 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
958 struct nfs4_state *state = NULL;
959 struct nfs_delegation *delegation;
962 if (!data->rpc_done) {
963 state = nfs4_try_open_cached(data);
968 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
970 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
971 ret = PTR_ERR(inode);
975 state = nfs4_get_open_state(inode, data->owner);
978 if (data->o_res.delegation_type != 0) {
979 int delegation_flags = 0;
982 delegation = rcu_dereference(NFS_I(inode)->delegation);
984 delegation_flags = delegation->flags;
986 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
987 nfs_inode_set_delegation(state->inode,
988 data->owner->so_cred,
991 nfs_inode_reclaim_delegation(state->inode,
992 data->owner->so_cred,
996 update_open_stateid(state, &data->o_res.stateid, NULL,
1004 return ERR_PTR(ret);
1007 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1009 struct nfs_inode *nfsi = NFS_I(state->inode);
1010 struct nfs_open_context *ctx;
1012 spin_lock(&state->inode->i_lock);
1013 list_for_each_entry(ctx, &nfsi->open_files, list) {
1014 if (ctx->state != state)
1016 get_nfs_open_context(ctx);
1017 spin_unlock(&state->inode->i_lock);
1020 spin_unlock(&state->inode->i_lock);
1021 return ERR_PTR(-ENOENT);
1024 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1026 struct nfs4_opendata *opendata;
1028 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
1029 if (opendata == NULL)
1030 return ERR_PTR(-ENOMEM);
1031 opendata->state = state;
1032 atomic_inc(&state->count);
1036 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1038 struct nfs4_state *newstate;
1041 opendata->o_arg.open_flags = 0;
1042 opendata->o_arg.fmode = fmode;
1043 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1044 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1045 nfs4_init_opendata_res(opendata);
1046 ret = _nfs4_proc_open(opendata);
1049 newstate = nfs4_opendata_to_nfs4_state(opendata);
1050 if (IS_ERR(newstate))
1051 return PTR_ERR(newstate);
1052 nfs4_close_state(&opendata->path, newstate, fmode);
1057 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1059 struct nfs4_state *newstate;
1062 /* memory barrier prior to reading state->n_* */
1063 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1065 if (state->n_rdwr != 0) {
1066 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1069 if (newstate != state)
1072 if (state->n_wronly != 0) {
1073 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1076 if (newstate != state)
1079 if (state->n_rdonly != 0) {
1080 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1083 if (newstate != state)
1087 * We may have performed cached opens for all three recoveries.
1088 * Check if we need to update the current stateid.
1090 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1091 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1092 write_seqlock(&state->seqlock);
1093 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1094 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1095 write_sequnlock(&state->seqlock);
1102 * reclaim state on the server after a reboot.
1104 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1106 struct nfs_delegation *delegation;
1107 struct nfs4_opendata *opendata;
1108 fmode_t delegation_type = 0;
1111 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1112 if (IS_ERR(opendata))
1113 return PTR_ERR(opendata);
1114 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1115 opendata->o_arg.fh = NFS_FH(state->inode);
1117 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1118 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1119 delegation_type = delegation->type;
1121 opendata->o_arg.u.delegation_type = delegation_type;
1122 status = nfs4_open_recover(opendata, state);
1123 nfs4_opendata_put(opendata);
1127 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1129 struct nfs_server *server = NFS_SERVER(state->inode);
1130 struct nfs4_exception exception = { };
1133 err = _nfs4_do_open_reclaim(ctx, state);
1134 if (err != -NFS4ERR_DELAY)
1136 nfs4_handle_exception(server, err, &exception);
1137 } while (exception.retry);
1141 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1143 struct nfs_open_context *ctx;
1146 ctx = nfs4_state_find_open_context(state);
1148 return PTR_ERR(ctx);
1149 ret = nfs4_do_open_reclaim(ctx, state);
1150 put_nfs_open_context(ctx);
1154 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1156 struct nfs4_opendata *opendata;
1159 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1160 if (IS_ERR(opendata))
1161 return PTR_ERR(opendata);
1162 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1163 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1164 sizeof(opendata->o_arg.u.delegation.data));
1165 ret = nfs4_open_recover(opendata, state);
1166 nfs4_opendata_put(opendata);
1170 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1172 struct nfs4_exception exception = { };
1173 struct nfs_server *server = NFS_SERVER(state->inode);
1176 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1182 case -NFS4ERR_STALE_CLIENTID:
1183 case -NFS4ERR_STALE_STATEID:
1184 case -NFS4ERR_EXPIRED:
1185 /* Don't recall a delegation if it was lost */
1186 nfs4_schedule_state_recovery(server->nfs_client);
1190 * The show must go on: exit, but mark the
1191 * stateid as needing recovery.
1193 case -NFS4ERR_ADMIN_REVOKED:
1194 case -NFS4ERR_BAD_STATEID:
1195 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1200 err = nfs4_handle_exception(server, err, &exception);
1201 } while (exception.retry);
1206 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1208 struct nfs4_opendata *data = calldata;
1210 data->rpc_status = task->tk_status;
1211 if (RPC_ASSASSINATED(task))
1213 if (data->rpc_status == 0) {
1214 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1215 sizeof(data->o_res.stateid.data));
1216 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1217 renew_lease(data->o_res.server, data->timestamp);
1222 static void nfs4_open_confirm_release(void *calldata)
1224 struct nfs4_opendata *data = calldata;
1225 struct nfs4_state *state = NULL;
1227 /* If this request hasn't been cancelled, do nothing */
1228 if (data->cancelled == 0)
1230 /* In case of error, no cleanup! */
1231 if (!data->rpc_done)
1233 state = nfs4_opendata_to_nfs4_state(data);
1235 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1237 nfs4_opendata_put(data);
1240 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1241 .rpc_call_done = nfs4_open_confirm_done,
1242 .rpc_release = nfs4_open_confirm_release,
1246 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1248 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1250 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1251 struct rpc_task *task;
1252 struct rpc_message msg = {
1253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1254 .rpc_argp = &data->c_arg,
1255 .rpc_resp = &data->c_res,
1256 .rpc_cred = data->owner->so_cred,
1258 struct rpc_task_setup task_setup_data = {
1259 .rpc_client = server->client,
1260 .rpc_message = &msg,
1261 .callback_ops = &nfs4_open_confirm_ops,
1262 .callback_data = data,
1263 .workqueue = nfsiod_workqueue,
1264 .flags = RPC_TASK_ASYNC,
1268 kref_get(&data->kref);
1270 data->rpc_status = 0;
1271 data->timestamp = jiffies;
1272 task = rpc_run_task(&task_setup_data);
1274 return PTR_ERR(task);
1275 status = nfs4_wait_for_completion_rpc_task(task);
1277 data->cancelled = 1;
1280 status = data->rpc_status;
1285 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1287 struct nfs4_opendata *data = calldata;
1288 struct nfs4_state_owner *sp = data->owner;
1290 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1293 * Check if we still need to send an OPEN call, or if we can use
1294 * a delegation instead.
1296 if (data->state != NULL) {
1297 struct nfs_delegation *delegation;
1299 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1302 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1303 if (delegation != NULL &&
1304 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1310 /* Update sequence id. */
1311 data->o_arg.id = sp->so_owner_id.id;
1312 data->o_arg.clientid = sp->so_client->cl_clientid;
1313 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1314 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1315 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1317 data->timestamp = jiffies;
1318 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1319 &data->o_arg.seq_args,
1320 &data->o_res.seq_res, 1, task))
1322 rpc_call_start(task);
1325 task->tk_action = NULL;
1329 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1331 struct nfs4_opendata *data = calldata;
1333 data->rpc_status = task->tk_status;
1335 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1338 if (RPC_ASSASSINATED(task))
1340 if (task->tk_status == 0) {
1341 switch (data->o_res.f_attr->mode & S_IFMT) {
1345 data->rpc_status = -ELOOP;
1348 data->rpc_status = -EISDIR;
1351 data->rpc_status = -ENOTDIR;
1353 renew_lease(data->o_res.server, data->timestamp);
1354 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1355 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1360 static void nfs4_open_release(void *calldata)
1362 struct nfs4_opendata *data = calldata;
1363 struct nfs4_state *state = NULL;
1365 /* If this request hasn't been cancelled, do nothing */
1366 if (data->cancelled == 0)
1368 /* In case of error, no cleanup! */
1369 if (data->rpc_status != 0 || !data->rpc_done)
1371 /* In case we need an open_confirm, no cleanup! */
1372 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1374 state = nfs4_opendata_to_nfs4_state(data);
1376 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1378 nfs4_opendata_put(data);
1381 static const struct rpc_call_ops nfs4_open_ops = {
1382 .rpc_call_prepare = nfs4_open_prepare,
1383 .rpc_call_done = nfs4_open_done,
1384 .rpc_release = nfs4_open_release,
1388 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1390 static int _nfs4_proc_open(struct nfs4_opendata *data)
1392 struct inode *dir = data->dir->d_inode;
1393 struct nfs_server *server = NFS_SERVER(dir);
1394 struct nfs_openargs *o_arg = &data->o_arg;
1395 struct nfs_openres *o_res = &data->o_res;
1396 struct rpc_task *task;
1397 struct rpc_message msg = {
1398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1401 .rpc_cred = data->owner->so_cred,
1403 struct rpc_task_setup task_setup_data = {
1404 .rpc_client = server->client,
1405 .rpc_message = &msg,
1406 .callback_ops = &nfs4_open_ops,
1407 .callback_data = data,
1408 .workqueue = nfsiod_workqueue,
1409 .flags = RPC_TASK_ASYNC,
1413 kref_get(&data->kref);
1415 data->rpc_status = 0;
1416 data->cancelled = 0;
1417 task = rpc_run_task(&task_setup_data);
1419 return PTR_ERR(task);
1420 status = nfs4_wait_for_completion_rpc_task(task);
1422 data->cancelled = 1;
1425 status = data->rpc_status;
1427 if (status != 0 || !data->rpc_done)
1430 if (o_res->fh.size == 0)
1431 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1433 if (o_arg->open_flags & O_CREAT) {
1434 update_changeattr(dir, &o_res->cinfo);
1435 nfs_post_op_update_inode(dir, o_res->dir_attr);
1437 nfs_refresh_inode(dir, o_res->dir_attr);
1438 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1439 status = _nfs4_proc_open_confirm(data);
1443 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1444 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1448 static int nfs4_recover_expired_lease(struct nfs_server *server)
1450 struct nfs_client *clp = server->nfs_client;
1454 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1455 ret = nfs4_wait_clnt_recover(clp);
1458 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1459 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1461 nfs4_schedule_state_recovery(clp);
1469 * reclaim state on the server after a network partition.
1470 * Assumes caller holds the appropriate lock
1472 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1474 struct nfs4_opendata *opendata;
1477 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1478 if (IS_ERR(opendata))
1479 return PTR_ERR(opendata);
1480 ret = nfs4_open_recover(opendata, state);
1482 d_drop(ctx->path.dentry);
1483 nfs4_opendata_put(opendata);
1487 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1489 struct nfs_server *server = NFS_SERVER(state->inode);
1490 struct nfs4_exception exception = { };
1494 err = _nfs4_open_expired(ctx, state);
1498 case -NFS4ERR_GRACE:
1499 case -NFS4ERR_DELAY:
1500 nfs4_handle_exception(server, err, &exception);
1503 } while (exception.retry);
1508 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1510 struct nfs_open_context *ctx;
1513 ctx = nfs4_state_find_open_context(state);
1515 return PTR_ERR(ctx);
1516 ret = nfs4_do_open_expired(ctx, state);
1517 put_nfs_open_context(ctx);
1522 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1523 * fields corresponding to attributes that were used to store the verifier.
1524 * Make sure we clobber those fields in the later setattr call
1526 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1528 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1529 !(sattr->ia_valid & ATTR_ATIME_SET))
1530 sattr->ia_valid |= ATTR_ATIME;
1532 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1533 !(sattr->ia_valid & ATTR_MTIME_SET))
1534 sattr->ia_valid |= ATTR_MTIME;
1538 * Returns a referenced nfs4_state
1540 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)
1542 struct nfs4_state_owner *sp;
1543 struct nfs4_state *state = NULL;
1544 struct nfs_server *server = NFS_SERVER(dir);
1545 struct nfs4_opendata *opendata;
1548 /* Protect against reboot recovery conflicts */
1550 if (!(sp = nfs4_get_state_owner(server, cred))) {
1551 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1554 status = nfs4_recover_expired_lease(server);
1556 goto err_put_state_owner;
1557 if (path->dentry->d_inode != NULL)
1558 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1560 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1561 if (opendata == NULL)
1562 goto err_put_state_owner;
1564 if (path->dentry->d_inode != NULL)
1565 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1567 status = _nfs4_proc_open(opendata);
1569 goto err_opendata_put;
1571 if (opendata->o_arg.open_flags & O_EXCL)
1572 nfs4_exclusive_attrset(opendata, sattr);
1574 state = nfs4_opendata_to_nfs4_state(opendata);
1575 status = PTR_ERR(state);
1577 goto err_opendata_put;
1578 nfs4_opendata_put(opendata);
1579 nfs4_put_state_owner(sp);
1583 nfs4_opendata_put(opendata);
1584 err_put_state_owner:
1585 nfs4_put_state_owner(sp);
1592 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)
1594 struct nfs4_exception exception = { };
1595 struct nfs4_state *res;
1599 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1602 /* NOTE: BAD_SEQID means the server and client disagree about the
1603 * book-keeping w.r.t. state-changing operations
1604 * (OPEN/CLOSE/LOCK/LOCKU...)
1605 * It is actually a sign of a bug on the client or on the server.
1607 * If we receive a BAD_SEQID error in the particular case of
1608 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1609 * have unhashed the old state_owner for us, and that we can
1610 * therefore safely retry using a new one. We should still warn
1611 * the user though...
1613 if (status == -NFS4ERR_BAD_SEQID) {
1614 printk(KERN_WARNING "NFS: v4 server %s "
1615 " returned a bad sequence-id error!\n",
1616 NFS_SERVER(dir)->nfs_client->cl_hostname);
1617 exception.retry = 1;
1621 * BAD_STATEID on OPEN means that the server cancelled our
1622 * state before it received the OPEN_CONFIRM.
1623 * Recover by retrying the request as per the discussion
1624 * on Page 181 of RFC3530.
1626 if (status == -NFS4ERR_BAD_STATEID) {
1627 exception.retry = 1;
1630 if (status == -EAGAIN) {
1631 /* We must have found a delegation */
1632 exception.retry = 1;
1635 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1636 status, &exception));
1637 } while (exception.retry);
1641 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1642 struct nfs_fattr *fattr, struct iattr *sattr,
1643 struct nfs4_state *state)
1645 struct nfs_server *server = NFS_SERVER(inode);
1646 struct nfs_setattrargs arg = {
1647 .fh = NFS_FH(inode),
1650 .bitmask = server->attr_bitmask,
1652 struct nfs_setattrres res = {
1656 struct rpc_message msg = {
1657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1662 unsigned long timestamp = jiffies;
1665 nfs_fattr_init(fattr);
1667 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1668 /* Use that stateid */
1669 } else if (state != NULL) {
1670 nfs4_copy_stateid(&arg.stateid, state, current->files);
1672 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1674 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1675 if (status == 0 && state != NULL)
1676 renew_lease(server, timestamp);
1680 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1681 struct nfs_fattr *fattr, struct iattr *sattr,
1682 struct nfs4_state *state)
1684 struct nfs_server *server = NFS_SERVER(inode);
1685 struct nfs4_exception exception = { };
1688 err = nfs4_handle_exception(server,
1689 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1691 } while (exception.retry);
1695 struct nfs4_closedata {
1697 struct inode *inode;
1698 struct nfs4_state *state;
1699 struct nfs_closeargs arg;
1700 struct nfs_closeres res;
1701 struct nfs_fattr fattr;
1702 unsigned long timestamp;
1705 static void nfs4_free_closedata(void *data)
1707 struct nfs4_closedata *calldata = data;
1708 struct nfs4_state_owner *sp = calldata->state->owner;
1710 nfs4_put_open_state(calldata->state);
1711 nfs_free_seqid(calldata->arg.seqid);
1712 nfs4_put_state_owner(sp);
1713 path_put(&calldata->path);
1717 static void nfs4_close_done(struct rpc_task *task, void *data)
1719 struct nfs4_closedata *calldata = data;
1720 struct nfs4_state *state = calldata->state;
1721 struct nfs_server *server = NFS_SERVER(calldata->inode);
1723 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
1724 if (RPC_ASSASSINATED(task))
1726 /* hmm. we are done with the inode, and in the process of freeing
1727 * the state_owner. we keep this around to process errors
1729 switch (task->tk_status) {
1731 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1732 renew_lease(server, calldata->timestamp);
1734 case -NFS4ERR_STALE_STATEID:
1735 case -NFS4ERR_OLD_STATEID:
1736 case -NFS4ERR_BAD_STATEID:
1737 case -NFS4ERR_EXPIRED:
1738 if (calldata->arg.fmode == 0)
1741 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1742 nfs4_restart_rpc(task, server->nfs_client);
1746 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1749 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1751 struct nfs4_closedata *calldata = data;
1752 struct nfs4_state *state = calldata->state;
1753 int clear_rd, clear_wr, clear_rdwr;
1755 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1758 clear_rd = clear_wr = clear_rdwr = 0;
1759 spin_lock(&state->owner->so_lock);
1760 /* Calculate the change in open mode */
1761 if (state->n_rdwr == 0) {
1762 if (state->n_rdonly == 0) {
1763 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1764 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1766 if (state->n_wronly == 0) {
1767 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1768 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1771 spin_unlock(&state->owner->so_lock);
1772 if (!clear_rd && !clear_wr && !clear_rdwr) {
1773 /* Note: exit _without_ calling nfs4_close_done */
1774 task->tk_action = NULL;
1777 nfs_fattr_init(calldata->res.fattr);
1778 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1779 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1780 calldata->arg.fmode = FMODE_READ;
1781 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1782 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1783 calldata->arg.fmode = FMODE_WRITE;
1785 calldata->timestamp = jiffies;
1786 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1787 &calldata->arg.seq_args, &calldata->res.seq_res,
1790 rpc_call_start(task);
1793 static const struct rpc_call_ops nfs4_close_ops = {
1794 .rpc_call_prepare = nfs4_close_prepare,
1795 .rpc_call_done = nfs4_close_done,
1796 .rpc_release = nfs4_free_closedata,
1800 * It is possible for data to be read/written from a mem-mapped file
1801 * after the sys_close call (which hits the vfs layer as a flush).
1802 * This means that we can't safely call nfsv4 close on a file until
1803 * the inode is cleared. This in turn means that we are not good
1804 * NFSv4 citizens - we do not indicate to the server to update the file's
1805 * share state even when we are done with one of the three share
1806 * stateid's in the inode.
1808 * NOTE: Caller must be holding the sp->so_owner semaphore!
1810 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1812 struct nfs_server *server = NFS_SERVER(state->inode);
1813 struct nfs4_closedata *calldata;
1814 struct nfs4_state_owner *sp = state->owner;
1815 struct rpc_task *task;
1816 struct rpc_message msg = {
1817 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1818 .rpc_cred = state->owner->so_cred,
1820 struct rpc_task_setup task_setup_data = {
1821 .rpc_client = server->client,
1822 .rpc_message = &msg,
1823 .callback_ops = &nfs4_close_ops,
1824 .workqueue = nfsiod_workqueue,
1825 .flags = RPC_TASK_ASYNC,
1827 int status = -ENOMEM;
1829 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1830 if (calldata == NULL)
1832 calldata->inode = state->inode;
1833 calldata->state = state;
1834 calldata->arg.fh = NFS_FH(state->inode);
1835 calldata->arg.stateid = &state->open_stateid;
1836 if (nfs4_has_session(server->nfs_client))
1837 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1838 /* Serialization for the sequence id */
1839 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1840 if (calldata->arg.seqid == NULL)
1841 goto out_free_calldata;
1842 calldata->arg.fmode = 0;
1843 calldata->arg.bitmask = server->cache_consistency_bitmask;
1844 calldata->res.fattr = &calldata->fattr;
1845 calldata->res.seqid = calldata->arg.seqid;
1846 calldata->res.server = server;
1847 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
1848 calldata->path.mnt = mntget(path->mnt);
1849 calldata->path.dentry = dget(path->dentry);
1851 msg.rpc_argp = &calldata->arg,
1852 msg.rpc_resp = &calldata->res,
1853 task_setup_data.callback_data = calldata;
1854 task = rpc_run_task(&task_setup_data);
1856 return PTR_ERR(task);
1859 status = rpc_wait_for_completion_task(task);
1865 nfs4_put_open_state(state);
1866 nfs4_put_state_owner(sp);
1870 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1875 /* If the open_intent is for execute, we have an extra check to make */
1876 if (fmode & FMODE_EXEC) {
1877 ret = nfs_may_open(state->inode,
1878 state->owner->so_cred,
1879 nd->intent.open.flags);
1883 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1884 if (!IS_ERR(filp)) {
1885 struct nfs_open_context *ctx;
1886 ctx = nfs_file_open_context(filp);
1890 ret = PTR_ERR(filp);
1892 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1897 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1899 struct path path = {
1900 .mnt = nd->path.mnt,
1903 struct dentry *parent;
1905 struct rpc_cred *cred;
1906 struct nfs4_state *state;
1908 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1910 if (nd->flags & LOOKUP_CREATE) {
1911 attr.ia_mode = nd->intent.open.create_mode;
1912 attr.ia_valid = ATTR_MODE;
1913 if (!IS_POSIXACL(dir))
1914 attr.ia_mode &= ~current_umask();
1917 BUG_ON(nd->intent.open.flags & O_CREAT);
1920 cred = rpc_lookup_cred();
1922 return (struct dentry *)cred;
1923 parent = dentry->d_parent;
1924 /* Protect against concurrent sillydeletes */
1925 nfs_block_sillyrename(parent);
1926 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1928 if (IS_ERR(state)) {
1929 if (PTR_ERR(state) == -ENOENT) {
1930 d_add(dentry, NULL);
1931 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1933 nfs_unblock_sillyrename(parent);
1934 return (struct dentry *)state;
1936 res = d_add_unique(dentry, igrab(state->inode));
1939 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1940 nfs_unblock_sillyrename(parent);
1941 nfs4_intent_set_file(nd, &path, state, fmode);
1946 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1948 struct path path = {
1949 .mnt = nd->path.mnt,
1952 struct rpc_cred *cred;
1953 struct nfs4_state *state;
1954 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1956 cred = rpc_lookup_cred();
1958 return PTR_ERR(cred);
1959 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1961 if (IS_ERR(state)) {
1962 switch (PTR_ERR(state)) {
1968 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1974 if (state->inode == dentry->d_inode) {
1975 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1976 nfs4_intent_set_file(nd, &path, state, fmode);
1979 nfs4_close_sync(&path, state, fmode);
1985 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1987 if (ctx->state == NULL)
1990 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1992 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1995 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1997 struct nfs4_server_caps_arg args = {
2000 struct nfs4_server_caps_res res = {};
2001 struct rpc_message msg = {
2002 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2008 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2010 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2011 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2012 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2013 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2014 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2015 NFS_CAP_CTIME|NFS_CAP_MTIME);
2016 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2017 server->caps |= NFS_CAP_ACLS;
2018 if (res.has_links != 0)
2019 server->caps |= NFS_CAP_HARDLINKS;
2020 if (res.has_symlinks != 0)
2021 server->caps |= NFS_CAP_SYMLINKS;
2022 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2023 server->caps |= NFS_CAP_FILEID;
2024 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2025 server->caps |= NFS_CAP_MODE;
2026 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2027 server->caps |= NFS_CAP_NLINK;
2028 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2029 server->caps |= NFS_CAP_OWNER;
2030 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2031 server->caps |= NFS_CAP_OWNER_GROUP;
2032 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2033 server->caps |= NFS_CAP_ATIME;
2034 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2035 server->caps |= NFS_CAP_CTIME;
2036 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2037 server->caps |= NFS_CAP_MTIME;
2039 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2040 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2041 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2042 server->acl_bitmask = res.acl_bitmask;
2048 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2050 struct nfs4_exception exception = { };
2053 err = nfs4_handle_exception(server,
2054 _nfs4_server_capabilities(server, fhandle),
2056 } while (exception.retry);
2060 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2061 struct nfs_fsinfo *info)
2063 struct nfs4_lookup_root_arg args = {
2064 .bitmask = nfs4_fattr_bitmap,
2066 struct nfs4_lookup_res res = {
2068 .fattr = info->fattr,
2071 struct rpc_message msg = {
2072 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2077 nfs_fattr_init(info->fattr);
2078 return nfs4_call_sync(server, &msg, &args, &res, 0);
2081 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2082 struct nfs_fsinfo *info)
2084 struct nfs4_exception exception = { };
2087 err = nfs4_handle_exception(server,
2088 _nfs4_lookup_root(server, fhandle, info),
2090 } while (exception.retry);
2095 * get the file handle for the "/" directory on the server
2097 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2098 struct nfs_fsinfo *info)
2102 status = nfs4_lookup_root(server, fhandle, info);
2104 status = nfs4_server_capabilities(server, fhandle);
2106 status = nfs4_do_fsinfo(server, fhandle, info);
2107 return nfs4_map_errors(status);
2111 * Get locations and (maybe) other attributes of a referral.
2112 * Note that we'll actually follow the referral later when
2113 * we detect fsid mismatch in inode revalidation
2115 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2117 int status = -ENOMEM;
2118 struct page *page = NULL;
2119 struct nfs4_fs_locations *locations = NULL;
2121 page = alloc_page(GFP_KERNEL);
2124 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2125 if (locations == NULL)
2128 status = nfs4_proc_fs_locations(dir, name, locations, page);
2131 /* Make sure server returned a different fsid for the referral */
2132 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2133 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2138 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2139 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2141 fattr->mode = S_IFDIR;
2142 memset(fhandle, 0, sizeof(struct nfs_fh));
2151 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2153 struct nfs4_getattr_arg args = {
2155 .bitmask = server->attr_bitmask,
2157 struct nfs4_getattr_res res = {
2161 struct rpc_message msg = {
2162 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2167 nfs_fattr_init(fattr);
2168 return nfs4_call_sync(server, &msg, &args, &res, 0);
2171 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2173 struct nfs4_exception exception = { };
2176 err = nfs4_handle_exception(server,
2177 _nfs4_proc_getattr(server, fhandle, fattr),
2179 } while (exception.retry);
2184 * The file is not closed if it is opened due to the a request to change
2185 * the size of the file. The open call will not be needed once the
2186 * VFS layer lookup-intents are implemented.
2188 * Close is called when the inode is destroyed.
2189 * If we haven't opened the file for O_WRONLY, we
2190 * need to in the size_change case to obtain a stateid.
2193 * Because OPEN is always done by name in nfsv4, it is
2194 * possible that we opened a different file by the same
2195 * name. We can recognize this race condition, but we
2196 * can't do anything about it besides returning an error.
2198 * This will be fixed with VFS changes (lookup-intent).
2201 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2202 struct iattr *sattr)
2204 struct inode *inode = dentry->d_inode;
2205 struct rpc_cred *cred = NULL;
2206 struct nfs4_state *state = NULL;
2209 nfs_fattr_init(fattr);
2211 /* Search for an existing open(O_WRITE) file */
2212 if (sattr->ia_valid & ATTR_FILE) {
2213 struct nfs_open_context *ctx;
2215 ctx = nfs_file_open_context(sattr->ia_file);
2222 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2224 nfs_setattr_update_inode(inode, sattr);
2228 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2229 const struct qstr *name, struct nfs_fh *fhandle,
2230 struct nfs_fattr *fattr)
2233 struct nfs4_lookup_arg args = {
2234 .bitmask = server->attr_bitmask,
2238 struct nfs4_lookup_res res = {
2243 struct rpc_message msg = {
2244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2249 nfs_fattr_init(fattr);
2251 dprintk("NFS call lookupfh %s\n", name->name);
2252 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2253 dprintk("NFS reply lookupfh: %d\n", status);
2257 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2258 struct qstr *name, struct nfs_fh *fhandle,
2259 struct nfs_fattr *fattr)
2261 struct nfs4_exception exception = { };
2264 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2266 if (err == -NFS4ERR_MOVED) {
2270 err = nfs4_handle_exception(server, err, &exception);
2271 } while (exception.retry);
2275 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2276 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2280 dprintk("NFS call lookup %s\n", name->name);
2281 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2282 if (status == -NFS4ERR_MOVED)
2283 status = nfs4_get_referral(dir, name, fattr, fhandle);
2284 dprintk("NFS reply lookup: %d\n", status);
2288 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2290 struct nfs4_exception exception = { };
2293 err = nfs4_handle_exception(NFS_SERVER(dir),
2294 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2296 } while (exception.retry);
2300 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2302 struct nfs_server *server = NFS_SERVER(inode);
2303 struct nfs_fattr fattr;
2304 struct nfs4_accessargs args = {
2305 .fh = NFS_FH(inode),
2306 .bitmask = server->attr_bitmask,
2308 struct nfs4_accessres res = {
2312 struct rpc_message msg = {
2313 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2316 .rpc_cred = entry->cred,
2318 int mode = entry->mask;
2322 * Determine which access bits we want to ask for...
2324 if (mode & MAY_READ)
2325 args.access |= NFS4_ACCESS_READ;
2326 if (S_ISDIR(inode->i_mode)) {
2327 if (mode & MAY_WRITE)
2328 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2329 if (mode & MAY_EXEC)
2330 args.access |= NFS4_ACCESS_LOOKUP;
2332 if (mode & MAY_WRITE)
2333 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2334 if (mode & MAY_EXEC)
2335 args.access |= NFS4_ACCESS_EXECUTE;
2337 nfs_fattr_init(&fattr);
2338 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2341 if (res.access & NFS4_ACCESS_READ)
2342 entry->mask |= MAY_READ;
2343 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2344 entry->mask |= MAY_WRITE;
2345 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2346 entry->mask |= MAY_EXEC;
2347 nfs_refresh_inode(inode, &fattr);
2352 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2354 struct nfs4_exception exception = { };
2357 err = nfs4_handle_exception(NFS_SERVER(inode),
2358 _nfs4_proc_access(inode, entry),
2360 } while (exception.retry);
2365 * TODO: For the time being, we don't try to get any attributes
2366 * along with any of the zero-copy operations READ, READDIR,
2369 * In the case of the first three, we want to put the GETATTR
2370 * after the read-type operation -- this is because it is hard
2371 * to predict the length of a GETATTR response in v4, and thus
2372 * align the READ data correctly. This means that the GETATTR
2373 * may end up partially falling into the page cache, and we should
2374 * shift it into the 'tail' of the xdr_buf before processing.
2375 * To do this efficiently, we need to know the total length
2376 * of data received, which doesn't seem to be available outside
2379 * In the case of WRITE, we also want to put the GETATTR after
2380 * the operation -- in this case because we want to make sure
2381 * we get the post-operation mtime and size. This means that
2382 * we can't use xdr_encode_pages() as written: we need a variant
2383 * of it which would leave room in the 'tail' iovec.
2385 * Both of these changes to the XDR layer would in fact be quite
2386 * minor, but I decided to leave them for a subsequent patch.
2388 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2389 unsigned int pgbase, unsigned int pglen)
2391 struct nfs4_readlink args = {
2392 .fh = NFS_FH(inode),
2397 struct nfs4_readlink_res res;
2398 struct rpc_message msg = {
2399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2404 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2407 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2408 unsigned int pgbase, unsigned int pglen)
2410 struct nfs4_exception exception = { };
2413 err = nfs4_handle_exception(NFS_SERVER(inode),
2414 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2416 } while (exception.retry);
2422 * We will need to arrange for the VFS layer to provide an atomic open.
2423 * Until then, this create/open method is prone to inefficiency and race
2424 * conditions due to the lookup, create, and open VFS calls from sys_open()
2425 * placed on the wire.
2427 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2428 * The file will be opened again in the subsequent VFS open call
2429 * (nfs4_proc_file_open).
2431 * The open for read will just hang around to be used by any process that
2432 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2436 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2437 int flags, struct nameidata *nd)
2439 struct path path = {
2440 .mnt = nd->path.mnt,
2443 struct nfs4_state *state;
2444 struct rpc_cred *cred;
2445 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2448 cred = rpc_lookup_cred();
2450 status = PTR_ERR(cred);
2453 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2455 if (IS_ERR(state)) {
2456 status = PTR_ERR(state);
2459 d_add(dentry, igrab(state->inode));
2460 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2461 if (flags & O_EXCL) {
2462 struct nfs_fattr fattr;
2463 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2465 nfs_setattr_update_inode(state->inode, sattr);
2466 nfs_post_op_update_inode(state->inode, &fattr);
2468 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2469 status = nfs4_intent_set_file(nd, &path, state, fmode);
2471 nfs4_close_sync(&path, state, fmode);
2478 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2480 struct nfs_server *server = NFS_SERVER(dir);
2481 struct nfs_removeargs args = {
2483 .name.len = name->len,
2484 .name.name = name->name,
2485 .bitmask = server->attr_bitmask,
2487 struct nfs_removeres res = {
2490 struct rpc_message msg = {
2491 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2497 nfs_fattr_init(&res.dir_attr);
2498 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2500 update_changeattr(dir, &res.cinfo);
2501 nfs_post_op_update_inode(dir, &res.dir_attr);
2506 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2508 struct nfs4_exception exception = { };
2511 err = nfs4_handle_exception(NFS_SERVER(dir),
2512 _nfs4_proc_remove(dir, name),
2514 } while (exception.retry);
2518 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2520 struct nfs_server *server = NFS_SERVER(dir);
2521 struct nfs_removeargs *args = msg->rpc_argp;
2522 struct nfs_removeres *res = msg->rpc_resp;
2524 args->bitmask = server->cache_consistency_bitmask;
2525 res->server = server;
2526 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2529 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2531 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2533 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
2534 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2536 update_changeattr(dir, &res->cinfo);
2537 nfs_post_op_update_inode(dir, &res->dir_attr);
2541 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2542 struct inode *new_dir, struct qstr *new_name)
2544 struct nfs_server *server = NFS_SERVER(old_dir);
2545 struct nfs4_rename_arg arg = {
2546 .old_dir = NFS_FH(old_dir),
2547 .new_dir = NFS_FH(new_dir),
2548 .old_name = old_name,
2549 .new_name = new_name,
2550 .bitmask = server->attr_bitmask,
2552 struct nfs_fattr old_fattr, new_fattr;
2553 struct nfs4_rename_res res = {
2555 .old_fattr = &old_fattr,
2556 .new_fattr = &new_fattr,
2558 struct rpc_message msg = {
2559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2565 nfs_fattr_init(res.old_fattr);
2566 nfs_fattr_init(res.new_fattr);
2567 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2570 update_changeattr(old_dir, &res.old_cinfo);
2571 nfs_post_op_update_inode(old_dir, res.old_fattr);
2572 update_changeattr(new_dir, &res.new_cinfo);
2573 nfs_post_op_update_inode(new_dir, res.new_fattr);
2578 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2579 struct inode *new_dir, struct qstr *new_name)
2581 struct nfs4_exception exception = { };
2584 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2585 _nfs4_proc_rename(old_dir, old_name,
2588 } while (exception.retry);
2592 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2594 struct nfs_server *server = NFS_SERVER(inode);
2595 struct nfs4_link_arg arg = {
2596 .fh = NFS_FH(inode),
2597 .dir_fh = NFS_FH(dir),
2599 .bitmask = server->attr_bitmask,
2601 struct nfs_fattr fattr, dir_attr;
2602 struct nfs4_link_res res = {
2605 .dir_attr = &dir_attr,
2607 struct rpc_message msg = {
2608 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2614 nfs_fattr_init(res.fattr);
2615 nfs_fattr_init(res.dir_attr);
2616 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2618 update_changeattr(dir, &res.cinfo);
2619 nfs_post_op_update_inode(dir, res.dir_attr);
2620 nfs_post_op_update_inode(inode, res.fattr);
2626 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2628 struct nfs4_exception exception = { };
2631 err = nfs4_handle_exception(NFS_SERVER(inode),
2632 _nfs4_proc_link(inode, dir, name),
2634 } while (exception.retry);
2638 struct nfs4_createdata {
2639 struct rpc_message msg;
2640 struct nfs4_create_arg arg;
2641 struct nfs4_create_res res;
2643 struct nfs_fattr fattr;
2644 struct nfs_fattr dir_fattr;
2647 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2648 struct qstr *name, struct iattr *sattr, u32 ftype)
2650 struct nfs4_createdata *data;
2652 data = kzalloc(sizeof(*data), GFP_KERNEL);
2654 struct nfs_server *server = NFS_SERVER(dir);
2656 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2657 data->msg.rpc_argp = &data->arg;
2658 data->msg.rpc_resp = &data->res;
2659 data->arg.dir_fh = NFS_FH(dir);
2660 data->arg.server = server;
2661 data->arg.name = name;
2662 data->arg.attrs = sattr;
2663 data->arg.ftype = ftype;
2664 data->arg.bitmask = server->attr_bitmask;
2665 data->res.server = server;
2666 data->res.fh = &data->fh;
2667 data->res.fattr = &data->fattr;
2668 data->res.dir_fattr = &data->dir_fattr;
2669 nfs_fattr_init(data->res.fattr);
2670 nfs_fattr_init(data->res.dir_fattr);
2675 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2677 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2678 &data->arg, &data->res, 1);
2680 update_changeattr(dir, &data->res.dir_cinfo);
2681 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2682 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2687 static void nfs4_free_createdata(struct nfs4_createdata *data)
2692 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2693 struct page *page, unsigned int len, struct iattr *sattr)
2695 struct nfs4_createdata *data;
2696 int status = -ENAMETOOLONG;
2698 if (len > NFS4_MAXPATHLEN)
2702 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2706 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2707 data->arg.u.symlink.pages = &page;
2708 data->arg.u.symlink.len = len;
2710 status = nfs4_do_create(dir, dentry, data);
2712 nfs4_free_createdata(data);
2717 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2718 struct page *page, unsigned int len, struct iattr *sattr)
2720 struct nfs4_exception exception = { };
2723 err = nfs4_handle_exception(NFS_SERVER(dir),
2724 _nfs4_proc_symlink(dir, dentry, page,
2727 } while (exception.retry);
2731 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2732 struct iattr *sattr)
2734 struct nfs4_createdata *data;
2735 int status = -ENOMEM;
2737 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2741 status = nfs4_do_create(dir, dentry, data);
2743 nfs4_free_createdata(data);
2748 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2749 struct iattr *sattr)
2751 struct nfs4_exception exception = { };
2754 err = nfs4_handle_exception(NFS_SERVER(dir),
2755 _nfs4_proc_mkdir(dir, dentry, sattr),
2757 } while (exception.retry);
2761 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2762 u64 cookie, struct page *page, unsigned int count, int plus)
2764 struct inode *dir = dentry->d_inode;
2765 struct nfs4_readdir_arg args = {
2770 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2772 struct nfs4_readdir_res res;
2773 struct rpc_message msg = {
2774 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2781 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2782 dentry->d_parent->d_name.name,
2783 dentry->d_name.name,
2784 (unsigned long long)cookie);
2785 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2786 res.pgbase = args.pgbase;
2787 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2789 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2791 nfs_invalidate_atime(dir);
2793 dprintk("%s: returns %d\n", __func__, status);
2797 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2798 u64 cookie, struct page *page, unsigned int count, int plus)
2800 struct nfs4_exception exception = { };
2803 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2804 _nfs4_proc_readdir(dentry, cred, cookie,
2807 } while (exception.retry);
2811 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2812 struct iattr *sattr, dev_t rdev)
2814 struct nfs4_createdata *data;
2815 int mode = sattr->ia_mode;
2816 int status = -ENOMEM;
2818 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2819 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2821 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2826 data->arg.ftype = NF4FIFO;
2827 else if (S_ISBLK(mode)) {
2828 data->arg.ftype = NF4BLK;
2829 data->arg.u.device.specdata1 = MAJOR(rdev);
2830 data->arg.u.device.specdata2 = MINOR(rdev);
2832 else if (S_ISCHR(mode)) {
2833 data->arg.ftype = NF4CHR;
2834 data->arg.u.device.specdata1 = MAJOR(rdev);
2835 data->arg.u.device.specdata2 = MINOR(rdev);
2838 status = nfs4_do_create(dir, dentry, data);
2840 nfs4_free_createdata(data);
2845 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2846 struct iattr *sattr, dev_t rdev)
2848 struct nfs4_exception exception = { };
2851 err = nfs4_handle_exception(NFS_SERVER(dir),
2852 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2854 } while (exception.retry);
2858 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2859 struct nfs_fsstat *fsstat)
2861 struct nfs4_statfs_arg args = {
2863 .bitmask = server->attr_bitmask,
2865 struct nfs4_statfs_res res = {
2868 struct rpc_message msg = {
2869 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2874 nfs_fattr_init(fsstat->fattr);
2875 return nfs4_call_sync(server, &msg, &args, &res, 0);
2878 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2880 struct nfs4_exception exception = { };
2883 err = nfs4_handle_exception(server,
2884 _nfs4_proc_statfs(server, fhandle, fsstat),
2886 } while (exception.retry);
2890 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2891 struct nfs_fsinfo *fsinfo)
2893 struct nfs4_fsinfo_arg args = {
2895 .bitmask = server->attr_bitmask,
2897 struct nfs4_fsinfo_res res = {
2900 struct rpc_message msg = {
2901 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2906 return nfs4_call_sync(server, &msg, &args, &res, 0);
2909 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2911 struct nfs4_exception exception = { };
2915 err = nfs4_handle_exception(server,
2916 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2918 } while (exception.retry);
2922 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2924 nfs_fattr_init(fsinfo->fattr);
2925 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2928 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2929 struct nfs_pathconf *pathconf)
2931 struct nfs4_pathconf_arg args = {
2933 .bitmask = server->attr_bitmask,
2935 struct nfs4_pathconf_res res = {
2936 .pathconf = pathconf,
2938 struct rpc_message msg = {
2939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2944 /* None of the pathconf attributes are mandatory to implement */
2945 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2946 memset(pathconf, 0, sizeof(*pathconf));
2950 nfs_fattr_init(pathconf->fattr);
2951 return nfs4_call_sync(server, &msg, &args, &res, 0);
2954 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2955 struct nfs_pathconf *pathconf)
2957 struct nfs4_exception exception = { };
2961 err = nfs4_handle_exception(server,
2962 _nfs4_proc_pathconf(server, fhandle, pathconf),
2964 } while (exception.retry);
2968 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2970 struct nfs_server *server = NFS_SERVER(data->inode);
2972 dprintk("--> %s\n", __func__);
2974 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2976 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
2977 nfs4_restart_rpc(task, server->nfs_client);
2981 nfs_invalidate_atime(data->inode);
2982 if (task->tk_status > 0)
2983 renew_lease(server, data->timestamp);
2987 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2989 data->timestamp = jiffies;
2990 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2993 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2995 struct inode *inode = data->inode;
2997 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3000 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3001 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3004 if (task->tk_status >= 0) {
3005 renew_lease(NFS_SERVER(inode), data->timestamp);
3006 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3011 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3013 struct nfs_server *server = NFS_SERVER(data->inode);
3015 data->args.bitmask = server->cache_consistency_bitmask;
3016 data->res.server = server;
3017 data->timestamp = jiffies;
3019 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3022 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3024 struct inode *inode = data->inode;
3026 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3028 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3029 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3032 nfs_refresh_inode(inode, data->res.fattr);
3036 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3038 struct nfs_server *server = NFS_SERVER(data->inode);
3040 data->args.bitmask = server->cache_consistency_bitmask;
3041 data->res.server = server;
3042 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3046 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3047 * standalone procedure for queueing an asynchronous RENEW.
3049 static void nfs4_renew_done(struct rpc_task *task, void *data)
3051 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
3052 unsigned long timestamp = (unsigned long)data;
3054 if (task->tk_status < 0) {
3055 /* Unless we're shutting down, schedule state recovery! */
3056 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3057 nfs4_schedule_state_recovery(clp);
3060 spin_lock(&clp->cl_lock);
3061 if (time_before(clp->cl_last_renewal,timestamp))
3062 clp->cl_last_renewal = timestamp;
3063 spin_unlock(&clp->cl_lock);
3066 static const struct rpc_call_ops nfs4_renew_ops = {
3067 .rpc_call_done = nfs4_renew_done,
3070 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3072 struct rpc_message msg = {
3073 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3078 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3079 &nfs4_renew_ops, (void *)jiffies);
3082 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3084 struct rpc_message msg = {
3085 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3089 unsigned long now = jiffies;
3092 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3095 spin_lock(&clp->cl_lock);
3096 if (time_before(clp->cl_last_renewal,now))
3097 clp->cl_last_renewal = now;
3098 spin_unlock(&clp->cl_lock);
3102 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3104 return (server->caps & NFS_CAP_ACLS)
3105 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3106 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3109 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3110 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3113 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3115 static void buf_to_pages(const void *buf, size_t buflen,
3116 struct page **pages, unsigned int *pgbase)
3118 const void *p = buf;
3120 *pgbase = offset_in_page(buf);
3122 while (p < buf + buflen) {
3123 *(pages++) = virt_to_page(p);
3124 p += PAGE_CACHE_SIZE;
3128 struct nfs4_cached_acl {
3134 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3136 struct nfs_inode *nfsi = NFS_I(inode);
3138 spin_lock(&inode->i_lock);
3139 kfree(nfsi->nfs4_acl);
3140 nfsi->nfs4_acl = acl;
3141 spin_unlock(&inode->i_lock);
3144 static void nfs4_zap_acl_attr(struct inode *inode)
3146 nfs4_set_cached_acl(inode, NULL);
3149 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3151 struct nfs_inode *nfsi = NFS_I(inode);
3152 struct nfs4_cached_acl *acl;
3155 spin_lock(&inode->i_lock);
3156 acl = nfsi->nfs4_acl;
3159 if (buf == NULL) /* user is just asking for length */
3161 if (acl->cached == 0)
3163 ret = -ERANGE; /* see getxattr(2) man page */
3164 if (acl->len > buflen)
3166 memcpy(buf, acl->data, acl->len);
3170 spin_unlock(&inode->i_lock);
3174 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3176 struct nfs4_cached_acl *acl;
3178 if (buf && acl_len <= PAGE_SIZE) {
3179 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3183 memcpy(acl->data, buf, acl_len);
3185 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3192 nfs4_set_cached_acl(inode, acl);
3195 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3197 struct page *pages[NFS4ACL_MAXPAGES];
3198 struct nfs_getaclargs args = {
3199 .fh = NFS_FH(inode),
3203 struct nfs_getaclres res = {
3207 struct rpc_message msg = {
3208 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3212 struct page *localpage = NULL;
3215 if (buflen < PAGE_SIZE) {
3216 /* As long as we're doing a round trip to the server anyway,
3217 * let's be prepared for a page of acl data. */
3218 localpage = alloc_page(GFP_KERNEL);
3219 resp_buf = page_address(localpage);
3220 if (localpage == NULL)
3222 args.acl_pages[0] = localpage;
3223 args.acl_pgbase = 0;
3224 args.acl_len = PAGE_SIZE;
3227 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3229 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3232 if (res.acl_len > args.acl_len)
3233 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3235 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3238 if (res.acl_len > buflen)
3241 memcpy(buf, resp_buf, res.acl_len);
3246 __free_page(localpage);
3250 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3252 struct nfs4_exception exception = { };
3255 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3258 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3259 } while (exception.retry);
3263 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3265 struct nfs_server *server = NFS_SERVER(inode);
3268 if (!nfs4_server_supports_acls(server))
3270 ret = nfs_revalidate_inode(server, inode);
3273 ret = nfs4_read_cached_acl(inode, buf, buflen);
3276 return nfs4_get_acl_uncached(inode, buf, buflen);
3279 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3281 struct nfs_server *server = NFS_SERVER(inode);
3282 struct page *pages[NFS4ACL_MAXPAGES];
3283 struct nfs_setaclargs arg = {
3284 .fh = NFS_FH(inode),
3288 struct nfs_setaclres res;
3289 struct rpc_message msg = {
3290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3296 if (!nfs4_server_supports_acls(server))
3298 nfs_inode_return_delegation(inode);
3299 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3300 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3301 nfs_access_zap_cache(inode);
3302 nfs_zap_acl_cache(inode);
3306 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3308 struct nfs4_exception exception = { };
3311 err = nfs4_handle_exception(NFS_SERVER(inode),
3312 __nfs4_proc_set_acl(inode, buf, buflen),
3314 } while (exception.retry);
3319 _nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
3321 if (!clp || task->tk_status >= 0)
3323 switch(task->tk_status) {
3324 case -NFS4ERR_ADMIN_REVOKED:
3325 case -NFS4ERR_BAD_STATEID:
3326 case -NFS4ERR_OPENMODE:
3329 nfs4_state_mark_reclaim_nograce(clp, state);
3330 case -NFS4ERR_STALE_CLIENTID:
3331 case -NFS4ERR_STALE_STATEID:
3332 case -NFS4ERR_EXPIRED:
3333 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3334 nfs4_schedule_state_recovery(clp);
3335 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3336 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3337 task->tk_status = 0;
3339 #if defined(CONFIG_NFS_V4_1)
3340 case -NFS4ERR_BADSESSION:
3341 case -NFS4ERR_BADSLOT:
3342 case -NFS4ERR_BAD_HIGH_SLOT:
3343 case -NFS4ERR_DEADSESSION:
3344 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3345 case -NFS4ERR_SEQ_FALSE_RETRY:
3346 case -NFS4ERR_SEQ_MISORDERED:
3347 dprintk("%s ERROR %d, Reset session\n", __func__,
3349 nfs4_schedule_state_recovery(clp);
3350 task->tk_status = 0;
3352 #endif /* CONFIG_NFS_V4_1 */
3353 case -NFS4ERR_DELAY:
3355 nfs_inc_server_stats(server, NFSIOS_DELAY);
3356 case -NFS4ERR_GRACE:
3357 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3358 task->tk_status = 0;
3360 case -NFS4ERR_OLD_STATEID:
3361 task->tk_status = 0;
3364 task->tk_status = nfs4_map_errors(task->tk_status);
3369 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3371 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3374 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
3376 nfs4_verifier sc_verifier;
3377 struct nfs4_setclientid setclientid = {
3378 .sc_verifier = &sc_verifier,
3381 struct rpc_message msg = {
3382 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3383 .rpc_argp = &setclientid,
3391 p = (__be32*)sc_verifier.data;
3392 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3393 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3396 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3397 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3399 rpc_peeraddr2str(clp->cl_rpcclient,
3401 rpc_peeraddr2str(clp->cl_rpcclient,
3403 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3404 clp->cl_id_uniquifier);
3405 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3406 sizeof(setclientid.sc_netid),
3407 rpc_peeraddr2str(clp->cl_rpcclient,
3408 RPC_DISPLAY_NETID));
3409 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3410 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3411 clp->cl_ipaddr, port >> 8, port & 255);
3413 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3414 if (status != -NFS4ERR_CLID_INUSE)
3419 ssleep(clp->cl_lease_time + 1);
3421 if (++clp->cl_id_uniquifier == 0)
3427 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3429 struct nfs_fsinfo fsinfo;
3430 struct rpc_message msg = {
3431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3433 .rpc_resp = &fsinfo,
3440 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3442 spin_lock(&clp->cl_lock);
3443 clp->cl_lease_time = fsinfo.lease_time * HZ;
3444 clp->cl_last_renewal = now;
3445 spin_unlock(&clp->cl_lock);
3450 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3455 err = _nfs4_proc_setclientid_confirm(clp, cred);
3459 case -NFS4ERR_RESOURCE:
3460 /* The IBM lawyers misread another document! */
3461 case -NFS4ERR_DELAY:
3462 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3468 struct nfs4_delegreturndata {
3469 struct nfs4_delegreturnargs args;
3470 struct nfs4_delegreturnres res;
3472 nfs4_stateid stateid;
3473 unsigned long timestamp;
3474 struct nfs_fattr fattr;
3478 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3480 struct nfs4_delegreturndata *data = calldata;
3482 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3485 data->rpc_status = task->tk_status;
3486 if (data->rpc_status == 0)
3487 renew_lease(data->res.server, data->timestamp);
3490 static void nfs4_delegreturn_release(void *calldata)
3495 #if defined(CONFIG_NFS_V4_1)
3496 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3498 struct nfs4_delegreturndata *d_data;
3500 d_data = (struct nfs4_delegreturndata *)data;
3502 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3503 &d_data->args.seq_args,
3504 &d_data->res.seq_res, 1, task))
3506 rpc_call_start(task);
3508 #endif /* CONFIG_NFS_V4_1 */
3510 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3511 #if defined(CONFIG_NFS_V4_1)
3512 .rpc_call_prepare = nfs4_delegreturn_prepare,
3513 #endif /* CONFIG_NFS_V4_1 */
3514 .rpc_call_done = nfs4_delegreturn_done,
3515 .rpc_release = nfs4_delegreturn_release,
3518 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3520 struct nfs4_delegreturndata *data;
3521 struct nfs_server *server = NFS_SERVER(inode);
3522 struct rpc_task *task;
3523 struct rpc_message msg = {
3524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3527 struct rpc_task_setup task_setup_data = {
3528 .rpc_client = server->client,
3529 .rpc_message = &msg,
3530 .callback_ops = &nfs4_delegreturn_ops,
3531 .flags = RPC_TASK_ASYNC,
3535 data = kzalloc(sizeof(*data), GFP_KERNEL);
3538 data->args.fhandle = &data->fh;
3539 data->args.stateid = &data->stateid;
3540 data->args.bitmask = server->attr_bitmask;
3541 nfs_copy_fh(&data->fh, NFS_FH(inode));
3542 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3543 data->res.fattr = &data->fattr;
3544 data->res.server = server;
3545 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3546 nfs_fattr_init(data->res.fattr);
3547 data->timestamp = jiffies;
3548 data->rpc_status = 0;
3550 task_setup_data.callback_data = data;
3551 msg.rpc_argp = &data->args,
3552 msg.rpc_resp = &data->res,
3553 task = rpc_run_task(&task_setup_data);
3555 return PTR_ERR(task);
3558 status = nfs4_wait_for_completion_rpc_task(task);
3561 status = data->rpc_status;
3564 nfs_refresh_inode(inode, &data->fattr);
3570 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3572 struct nfs_server *server = NFS_SERVER(inode);
3573 struct nfs4_exception exception = { };
3576 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3578 case -NFS4ERR_STALE_STATEID:
3579 case -NFS4ERR_EXPIRED:
3583 err = nfs4_handle_exception(server, err, &exception);
3584 } while (exception.retry);
3588 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3589 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3592 * sleep, with exponential backoff, and retry the LOCK operation.
3594 static unsigned long
3595 nfs4_set_lock_task_retry(unsigned long timeout)
3597 schedule_timeout_killable(timeout);
3599 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3600 return NFS4_LOCK_MAXTIMEOUT;
3604 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3606 struct inode *inode = state->inode;
3607 struct nfs_server *server = NFS_SERVER(inode);
3608 struct nfs_client *clp = server->nfs_client;
3609 struct nfs_lockt_args arg = {
3610 .fh = NFS_FH(inode),
3613 struct nfs_lockt_res res = {
3616 struct rpc_message msg = {
3617 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3620 .rpc_cred = state->owner->so_cred,
3622 struct nfs4_lock_state *lsp;
3625 arg.lock_owner.clientid = clp->cl_clientid;
3626 status = nfs4_set_lock_state(state, request);
3629 lsp = request->fl_u.nfs4_fl.owner;
3630 arg.lock_owner.id = lsp->ls_id.id;
3631 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3634 request->fl_type = F_UNLCK;
3636 case -NFS4ERR_DENIED:
3639 request->fl_ops->fl_release_private(request);
3644 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3646 struct nfs4_exception exception = { };
3650 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3651 _nfs4_proc_getlk(state, cmd, request),
3653 } while (exception.retry);
3657 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3660 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3662 res = posix_lock_file_wait(file, fl);
3665 res = flock_lock_file_wait(file, fl);
3673 struct nfs4_unlockdata {
3674 struct nfs_locku_args arg;
3675 struct nfs_locku_res res;
3676 struct nfs4_lock_state *lsp;
3677 struct nfs_open_context *ctx;
3678 struct file_lock fl;
3679 const struct nfs_server *server;
3680 unsigned long timestamp;
3683 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3684 struct nfs_open_context *ctx,
3685 struct nfs4_lock_state *lsp,
3686 struct nfs_seqid *seqid)
3688 struct nfs4_unlockdata *p;
3689 struct inode *inode = lsp->ls_state->inode;
3691 p = kzalloc(sizeof(*p), GFP_KERNEL);
3694 p->arg.fh = NFS_FH(inode);
3696 p->arg.seqid = seqid;
3697 p->res.seqid = seqid;
3698 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3699 p->arg.stateid = &lsp->ls_stateid;
3701 atomic_inc(&lsp->ls_count);
3702 /* Ensure we don't close file until we're done freeing locks! */
3703 p->ctx = get_nfs_open_context(ctx);
3704 memcpy(&p->fl, fl, sizeof(p->fl));
3705 p->server = NFS_SERVER(inode);
3709 static void nfs4_locku_release_calldata(void *data)
3711 struct nfs4_unlockdata *calldata = data;
3712 nfs_free_seqid(calldata->arg.seqid);
3713 nfs4_put_lock_state(calldata->lsp);
3714 put_nfs_open_context(calldata->ctx);
3718 static void nfs4_locku_done(struct rpc_task *task, void *data)
3720 struct nfs4_unlockdata *calldata = data;
3722 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3724 if (RPC_ASSASSINATED(task))
3726 switch (task->tk_status) {
3728 memcpy(calldata->lsp->ls_stateid.data,
3729 calldata->res.stateid.data,
3730 sizeof(calldata->lsp->ls_stateid.data));
3731 renew_lease(calldata->server, calldata->timestamp);
3733 case -NFS4ERR_BAD_STATEID:
3734 case -NFS4ERR_OLD_STATEID:
3735 case -NFS4ERR_STALE_STATEID:
3736 case -NFS4ERR_EXPIRED:
3739 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3740 nfs4_restart_rpc(task,
3741 calldata->server->nfs_client);
3745 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3747 struct nfs4_unlockdata *calldata = data;
3749 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3751 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3752 /* Note: exit _without_ running nfs4_locku_done */
3753 task->tk_action = NULL;
3756 calldata->timestamp = jiffies;
3757 if (nfs4_setup_sequence(calldata->server->nfs_client,
3758 &calldata->arg.seq_args,
3759 &calldata->res.seq_res, 1, task))
3761 rpc_call_start(task);
3764 static const struct rpc_call_ops nfs4_locku_ops = {
3765 .rpc_call_prepare = nfs4_locku_prepare,
3766 .rpc_call_done = nfs4_locku_done,
3767 .rpc_release = nfs4_locku_release_calldata,
3770 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3771 struct nfs_open_context *ctx,
3772 struct nfs4_lock_state *lsp,
3773 struct nfs_seqid *seqid)
3775 struct nfs4_unlockdata *data;
3776 struct rpc_message msg = {
3777 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3778 .rpc_cred = ctx->cred,
3780 struct rpc_task_setup task_setup_data = {
3781 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3782 .rpc_message = &msg,
3783 .callback_ops = &nfs4_locku_ops,
3784 .workqueue = nfsiod_workqueue,
3785 .flags = RPC_TASK_ASYNC,
3788 /* Ensure this is an unlock - when canceling a lock, the
3789 * canceled lock is passed in, and it won't be an unlock.
3791 fl->fl_type = F_UNLCK;
3793 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3795 nfs_free_seqid(seqid);
3796 return ERR_PTR(-ENOMEM);
3799 msg.rpc_argp = &data->arg,
3800 msg.rpc_resp = &data->res,
3801 task_setup_data.callback_data = data;
3802 return rpc_run_task(&task_setup_data);
3805 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3807 struct nfs_inode *nfsi = NFS_I(state->inode);
3808 struct nfs_seqid *seqid;
3809 struct nfs4_lock_state *lsp;
3810 struct rpc_task *task;
3812 unsigned char fl_flags = request->fl_flags;
3814 status = nfs4_set_lock_state(state, request);
3815 /* Unlock _before_ we do the RPC call */
3816 request->fl_flags |= FL_EXISTS;
3817 down_read(&nfsi->rwsem);
3818 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3819 up_read(&nfsi->rwsem);
3822 up_read(&nfsi->rwsem);
3825 /* Is this a delegated lock? */
3826 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3828 lsp = request->fl_u.nfs4_fl.owner;
3829 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3833 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3834 status = PTR_ERR(task);
3837 status = nfs4_wait_for_completion_rpc_task(task);
3840 request->fl_flags = fl_flags;
3844 struct nfs4_lockdata {
3845 struct nfs_lock_args arg;
3846 struct nfs_lock_res res;
3847 struct nfs4_lock_state *lsp;
3848 struct nfs_open_context *ctx;
3849 struct file_lock fl;
3850 unsigned long timestamp;
3853 struct nfs_server *server;
3856 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3857 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3859 struct nfs4_lockdata *p;
3860 struct inode *inode = lsp->ls_state->inode;
3861 struct nfs_server *server = NFS_SERVER(inode);
3863 p = kzalloc(sizeof(*p), GFP_KERNEL);
3867 p->arg.fh = NFS_FH(inode);
3869 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3870 if (p->arg.open_seqid == NULL)
3872 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3873 if (p->arg.lock_seqid == NULL)
3874 goto out_free_seqid;
3875 p->arg.lock_stateid = &lsp->ls_stateid;
3876 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3877 p->arg.lock_owner.id = lsp->ls_id.id;
3878 p->res.lock_seqid = p->arg.lock_seqid;
3879 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3882 atomic_inc(&lsp->ls_count);
3883 p->ctx = get_nfs_open_context(ctx);
3884 memcpy(&p->fl, fl, sizeof(p->fl));
3887 nfs_free_seqid(p->arg.open_seqid);
3893 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3895 struct nfs4_lockdata *data = calldata;
3896 struct nfs4_state *state = data->lsp->ls_state;
3898 dprintk("%s: begin!\n", __func__);
3899 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3901 /* Do we need to do an open_to_lock_owner? */
3902 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3903 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3905 data->arg.open_stateid = &state->stateid;
3906 data->arg.new_lock_owner = 1;
3907 data->res.open_seqid = data->arg.open_seqid;
3909 data->arg.new_lock_owner = 0;
3910 data->timestamp = jiffies;
3911 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3912 &data->res.seq_res, 1, task))
3914 rpc_call_start(task);
3915 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3918 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3920 struct nfs4_lockdata *data = calldata;
3922 dprintk("%s: begin!\n", __func__);
3924 nfs4_sequence_done(data->server, &data->res.seq_res,
3927 data->rpc_status = task->tk_status;
3928 if (RPC_ASSASSINATED(task))
3930 if (data->arg.new_lock_owner != 0) {
3931 if (data->rpc_status == 0)
3932 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3936 if (data->rpc_status == 0) {
3937 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3938 sizeof(data->lsp->ls_stateid.data));
3939 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3940 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3943 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3946 static void nfs4_lock_release(void *calldata)
3948 struct nfs4_lockdata *data = calldata;
3950 dprintk("%s: begin!\n", __func__);
3951 nfs_free_seqid(data->arg.open_seqid);
3952 if (data->cancelled != 0) {
3953 struct rpc_task *task;
3954 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3955 data->arg.lock_seqid);
3958 dprintk("%s: cancelling lock!\n", __func__);
3960 nfs_free_seqid(data->arg.lock_seqid);
3961 nfs4_put_lock_state(data->lsp);
3962 put_nfs_open_context(data->ctx);
3964 dprintk("%s: done!\n", __func__);
3967 static const struct rpc_call_ops nfs4_lock_ops = {
3968 .rpc_call_prepare = nfs4_lock_prepare,
3969 .rpc_call_done = nfs4_lock_done,
3970 .rpc_release = nfs4_lock_release,
3973 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3975 struct nfs4_lockdata *data;
3976 struct rpc_task *task;
3977 struct rpc_message msg = {
3978 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3979 .rpc_cred = state->owner->so_cred,
3981 struct rpc_task_setup task_setup_data = {
3982 .rpc_client = NFS_CLIENT(state->inode),
3983 .rpc_message = &msg,
3984 .callback_ops = &nfs4_lock_ops,
3985 .workqueue = nfsiod_workqueue,
3986 .flags = RPC_TASK_ASYNC,
3990 dprintk("%s: begin!\n", __func__);
3991 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3992 fl->fl_u.nfs4_fl.owner);
3996 data->arg.block = 1;
3998 data->arg.reclaim = 1;
3999 msg.rpc_argp = &data->arg,
4000 msg.rpc_resp = &data->res,
4001 task_setup_data.callback_data = data;
4002 task = rpc_run_task(&task_setup_data);
4004 return PTR_ERR(task);
4005 ret = nfs4_wait_for_completion_rpc_task(task);
4007 ret = data->rpc_status;
4009 data->cancelled = 1;
4011 dprintk("%s: done, ret = %d!\n", __func__, ret);
4015 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4017 struct nfs_server *server = NFS_SERVER(state->inode);
4018 struct nfs4_exception exception = { };
4022 /* Cache the lock if possible... */
4023 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4025 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4026 if (err != -NFS4ERR_DELAY)
4028 nfs4_handle_exception(server, err, &exception);
4029 } while (exception.retry);
4033 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4035 struct nfs_server *server = NFS_SERVER(state->inode);
4036 struct nfs4_exception exception = { };
4039 err = nfs4_set_lock_state(state, request);
4043 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4045 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4049 case -NFS4ERR_GRACE:
4050 case -NFS4ERR_DELAY:
4051 nfs4_handle_exception(server, err, &exception);
4054 } while (exception.retry);
4059 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4061 struct nfs_inode *nfsi = NFS_I(state->inode);
4062 unsigned char fl_flags = request->fl_flags;
4065 /* Is this a delegated open? */
4066 status = nfs4_set_lock_state(state, request);
4069 request->fl_flags |= FL_ACCESS;
4070 status = do_vfs_lock(request->fl_file, request);
4073 down_read(&nfsi->rwsem);
4074 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4075 /* Yes: cache locks! */
4076 /* ...but avoid races with delegation recall... */
4077 request->fl_flags = fl_flags & ~FL_SLEEP;
4078 status = do_vfs_lock(request->fl_file, request);
4081 status = _nfs4_do_setlk(state, cmd, request, 0);
4084 /* Note: we always want to sleep here! */
4085 request->fl_flags = fl_flags | FL_SLEEP;
4086 if (do_vfs_lock(request->fl_file, request) < 0)
4087 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4089 up_read(&nfsi->rwsem);
4091 request->fl_flags = fl_flags;
4095 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4097 struct nfs4_exception exception = { };
4101 err = _nfs4_proc_setlk(state, cmd, request);
4102 if (err == -NFS4ERR_DENIED)
4104 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4106 } while (exception.retry);
4111 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4113 struct nfs_open_context *ctx;
4114 struct nfs4_state *state;
4115 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4118 /* verify open state */
4119 ctx = nfs_file_open_context(filp);
4122 if (request->fl_start < 0 || request->fl_end < 0)
4125 if (IS_GETLK(cmd)) {
4127 return nfs4_proc_getlk(state, F_GETLK, request);
4131 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4134 if (request->fl_type == F_UNLCK) {
4136 return nfs4_proc_unlck(state, cmd, request);
4143 status = nfs4_proc_setlk(state, cmd, request);
4144 if ((status != -EAGAIN) || IS_SETLK(cmd))
4146 timeout = nfs4_set_lock_task_retry(timeout);
4147 status = -ERESTARTSYS;
4150 } while(status < 0);
4154 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4156 struct nfs_server *server = NFS_SERVER(state->inode);
4157 struct nfs4_exception exception = { };
4160 err = nfs4_set_lock_state(state, fl);
4164 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
4167 printk(KERN_ERR "%s: unhandled error %d.\n",
4172 case -NFS4ERR_EXPIRED:
4173 case -NFS4ERR_STALE_CLIENTID:
4174 case -NFS4ERR_STALE_STATEID:
4175 nfs4_schedule_state_recovery(server->nfs_client);
4179 * The show must go on: exit, but mark the
4180 * stateid as needing recovery.
4182 case -NFS4ERR_ADMIN_REVOKED:
4183 case -NFS4ERR_BAD_STATEID:
4184 case -NFS4ERR_OPENMODE:
4185 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4189 case -NFS4ERR_DENIED:
4190 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4193 case -NFS4ERR_DELAY:
4196 err = nfs4_handle_exception(server, err, &exception);
4197 } while (exception.retry);
4202 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4204 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4205 size_t buflen, int flags)
4207 struct inode *inode = dentry->d_inode;
4209 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4212 return nfs4_proc_set_acl(inode, buf, buflen);
4215 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4216 * and that's what we'll do for e.g. user attributes that haven't been set.
4217 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4218 * attributes in kernel-managed attribute namespaces. */
4219 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4222 struct inode *inode = dentry->d_inode;
4224 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4227 return nfs4_proc_get_acl(inode, buf, buflen);
4230 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4232 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
4234 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4236 if (buf && buflen < len)
4239 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4243 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4245 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4246 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4247 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4250 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4251 NFS_ATTR_FATTR_NLINK;
4252 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4256 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4257 struct nfs4_fs_locations *fs_locations, struct page *page)
4259 struct nfs_server *server = NFS_SERVER(dir);
4261 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4262 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4264 struct nfs4_fs_locations_arg args = {
4265 .dir_fh = NFS_FH(dir),
4270 struct nfs4_fs_locations_res res = {
4271 .fs_locations = fs_locations,
4273 struct rpc_message msg = {
4274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4280 dprintk("%s: start\n", __func__);
4281 nfs_fattr_init(&fs_locations->fattr);
4282 fs_locations->server = server;
4283 fs_locations->nlocations = 0;
4284 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4285 nfs_fixup_referral_attributes(&fs_locations->fattr);
4286 dprintk("%s: returned status = %d\n", __func__, status);
4290 #ifdef CONFIG_NFS_V4_1
4292 * nfs4_proc_exchange_id()
4294 * Since the clientid has expired, all compounds using sessions
4295 * associated with the stale clientid will be returning
4296 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4297 * be in some phase of session reset.
4299 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4301 nfs4_verifier verifier;
4302 struct nfs41_exchange_id_args args = {
4304 .flags = clp->cl_exchange_flags,
4306 struct nfs41_exchange_id_res res = {
4310 struct rpc_message msg = {
4311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4318 dprintk("--> %s\n", __func__);
4319 BUG_ON(clp == NULL);
4321 /* Remove server-only flags */
4322 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4324 p = (u32 *)verifier.data;
4325 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4326 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4327 args.verifier = &verifier;
4330 args.id_len = scnprintf(args.id, sizeof(args.id),
4333 rpc_peeraddr2str(clp->cl_rpcclient,
4335 clp->cl_id_uniquifier);
4337 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4339 if (status != NFS4ERR_CLID_INUSE)
4345 if (++clp->cl_id_uniquifier == 0)
4349 dprintk("<-- %s status= %d\n", __func__, status);
4353 struct nfs4_get_lease_time_data {
4354 struct nfs4_get_lease_time_args *args;
4355 struct nfs4_get_lease_time_res *res;
4356 struct nfs_client *clp;
4359 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4363 struct nfs4_get_lease_time_data *data =
4364 (struct nfs4_get_lease_time_data *)calldata;
4366 dprintk("--> %s\n", __func__);
4367 /* just setup sequence, do not trigger session recovery
4368 since we're invoked within one */
4369 ret = nfs41_setup_sequence(data->clp->cl_session,
4370 &data->args->la_seq_args,
4371 &data->res->lr_seq_res, 0, task);
4373 BUG_ON(ret == -EAGAIN);
4374 rpc_call_start(task);
4375 dprintk("<-- %s\n", __func__);
4379 * Called from nfs4_state_manager thread for session setup, so don't recover
4380 * from sequence operation or clientid errors.
4382 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4384 struct nfs4_get_lease_time_data *data =
4385 (struct nfs4_get_lease_time_data *)calldata;
4387 dprintk("--> %s\n", __func__);
4388 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4389 switch (task->tk_status) {
4390 case -NFS4ERR_DELAY:
4391 case -NFS4ERR_GRACE:
4392 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4393 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4394 task->tk_status = 0;
4395 nfs4_restart_rpc(task, data->clp);
4398 dprintk("<-- %s\n", __func__);
4401 struct rpc_call_ops nfs4_get_lease_time_ops = {
4402 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4403 .rpc_call_done = nfs4_get_lease_time_done,
4406 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4408 struct rpc_task *task;
4409 struct nfs4_get_lease_time_args args;
4410 struct nfs4_get_lease_time_res res = {
4411 .lr_fsinfo = fsinfo,
4413 struct nfs4_get_lease_time_data data = {
4418 struct rpc_message msg = {
4419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4423 struct rpc_task_setup task_setup = {
4424 .rpc_client = clp->cl_rpcclient,
4425 .rpc_message = &msg,
4426 .callback_ops = &nfs4_get_lease_time_ops,
4427 .callback_data = &data
4431 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4432 dprintk("--> %s\n", __func__);
4433 task = rpc_run_task(&task_setup);
4436 status = PTR_ERR(task);
4438 status = task->tk_status;
4441 dprintk("<-- %s return %d\n", __func__, status);
4447 * Reset a slot table
4449 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4450 int old_max_slots, int ivalue)
4455 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
4458 * Until we have dynamic slot table adjustment, insist
4459 * upon the same slot table size
4461 if (max_slots != old_max_slots) {
4462 dprintk("%s reset slot table does't match old\n",
4464 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4467 spin_lock(&tbl->slot_tbl_lock);
4468 for (i = 0; i < max_slots; ++i)
4469 tbl->slots[i].seq_nr = ivalue;
4470 spin_unlock(&tbl->slot_tbl_lock);
4471 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4472 tbl, tbl->slots, tbl->max_slots);
4474 dprintk("<-- %s: return %d\n", __func__, ret);
4479 * Reset the forechannel and backchannel slot tables
4481 static int nfs4_reset_slot_tables(struct nfs4_session *session)
4485 status = nfs4_reset_slot_table(&session->fc_slot_table,
4486 session->fc_attrs.max_reqs,
4487 session->fc_slot_table.max_slots,
4492 status = nfs4_reset_slot_table(&session->bc_slot_table,
4493 session->bc_attrs.max_reqs,
4494 session->bc_slot_table.max_slots,
4499 /* Destroy the slot table */
4500 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4502 if (session->fc_slot_table.slots != NULL) {
4503 kfree(session->fc_slot_table.slots);
4504 session->fc_slot_table.slots = NULL;
4506 if (session->bc_slot_table.slots != NULL) {
4507 kfree(session->bc_slot_table.slots);
4508 session->bc_slot_table.slots = NULL;
4514 * Initialize slot table
4516 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4517 int max_slots, int ivalue)
4519 struct nfs4_slot *slot;
4522 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4524 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4526 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4531 spin_lock(&tbl->slot_tbl_lock);
4532 tbl->max_slots = max_slots;
4534 tbl->highest_used_slotid = -1; /* no slot is currently used */
4535 spin_unlock(&tbl->slot_tbl_lock);
4536 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4537 tbl, tbl->slots, tbl->max_slots);
4539 dprintk("<-- %s: return %d\n", __func__, ret);
4544 * Initialize the forechannel and backchannel tables
4546 static int nfs4_init_slot_tables(struct nfs4_session *session)
4548 struct nfs4_slot_table *tbl;
4551 tbl = &session->fc_slot_table;
4552 if (tbl->slots == NULL) {
4553 status = nfs4_init_slot_table(tbl,
4554 session->fc_attrs.max_reqs, 1);
4559 tbl = &session->bc_slot_table;
4560 if (tbl->slots == NULL) {
4561 status = nfs4_init_slot_table(tbl,
4562 session->bc_attrs.max_reqs, 0);
4564 nfs4_destroy_slot_tables(session);
4570 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4572 struct nfs4_session *session;
4573 struct nfs4_slot_table *tbl;
4575 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4580 * The create session reply races with the server back
4581 * channel probe. Mark the client NFS_CS_SESSION_INITING
4582 * so that the client back channel can find the
4585 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4586 init_completion(&session->complete);
4588 tbl = &session->fc_slot_table;
4589 spin_lock_init(&tbl->slot_tbl_lock);
4590 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4592 tbl = &session->bc_slot_table;
4593 spin_lock_init(&tbl->slot_tbl_lock);
4594 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4600 void nfs4_destroy_session(struct nfs4_session *session)
4602 nfs4_proc_destroy_session(session);
4603 dprintk("%s Destroy backchannel for xprt %p\n",
4604 __func__, session->clp->cl_rpcclient->cl_xprt);
4605 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4606 NFS41_BC_MIN_CALLBACKS);
4607 nfs4_destroy_slot_tables(session);
4612 * Initialize the values to be used by the client in CREATE_SESSION
4613 * If nfs4_init_session set the fore channel request and response sizes,
4616 * Set the back channel max_resp_sz_cached to zero to force the client to
4617 * always set csa_cachethis to FALSE because the current implementation
4618 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4620 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4622 struct nfs4_session *session = args->client->cl_session;
4623 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4624 mxresp_sz = session->fc_attrs.max_resp_sz;
4627 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4629 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4630 /* Fore channel attributes */
4631 args->fc_attrs.headerpadsz = 0;
4632 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4633 args->fc_attrs.max_resp_sz = mxresp_sz;
4634 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4635 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4636 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4638 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4639 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4641 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4642 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4643 args->fc_attrs.max_reqs);
4645 /* Back channel attributes */
4646 args->bc_attrs.headerpadsz = 0;
4647 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4648 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4649 args->bc_attrs.max_resp_sz_cached = 0;
4650 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4651 args->bc_attrs.max_reqs = 1;
4653 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4654 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4656 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4657 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4658 args->bc_attrs.max_reqs);
4661 static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4665 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4666 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4670 #define _verify_fore_channel_attr(_name_) \
4671 _verify_channel_attr("fore", #_name_, \
4672 args->fc_attrs._name_, \
4673 session->fc_attrs._name_)
4675 #define _verify_back_channel_attr(_name_) \
4676 _verify_channel_attr("back", #_name_, \
4677 args->bc_attrs._name_, \
4678 session->bc_attrs._name_)
4681 * The server is not allowed to increase the fore channel header pad size,
4682 * maximum response size, or maximum number of operations.
4684 * The back channel attributes are only negotiatied down: We send what the
4685 * (back channel) server insists upon.
4687 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4688 struct nfs4_session *session)
4692 ret |= _verify_fore_channel_attr(headerpadsz);
4693 ret |= _verify_fore_channel_attr(max_resp_sz);
4694 ret |= _verify_fore_channel_attr(max_ops);
4696 ret |= _verify_back_channel_attr(headerpadsz);
4697 ret |= _verify_back_channel_attr(max_rqst_sz);
4698 ret |= _verify_back_channel_attr(max_resp_sz);
4699 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4700 ret |= _verify_back_channel_attr(max_ops);
4701 ret |= _verify_back_channel_attr(max_reqs);
4706 static int _nfs4_proc_create_session(struct nfs_client *clp)
4708 struct nfs4_session *session = clp->cl_session;
4709 struct nfs41_create_session_args args = {
4711 .cb_program = NFS4_CALLBACK,
4713 struct nfs41_create_session_res res = {
4716 struct rpc_message msg = {
4717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4723 nfs4_init_channel_attrs(&args);
4724 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
4726 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4729 /* Verify the session's negotiated channel_attrs values */
4730 status = nfs4_verify_channel_attrs(&args, session);
4732 /* Increment the clientid slot sequence id */
4740 * Issues a CREATE_SESSION operation to the server.
4741 * It is the responsibility of the caller to verify the session is
4742 * expired before calling this routine.
4744 int nfs4_proc_create_session(struct nfs_client *clp)
4748 struct nfs_fsinfo fsinfo;
4749 struct nfs4_session *session = clp->cl_session;
4751 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4753 status = _nfs4_proc_create_session(clp);
4757 /* Init and reset the fore channel */
4758 status = nfs4_init_slot_tables(session);
4759 dprintk("slot table initialization returned %d\n", status);
4762 status = nfs4_reset_slot_tables(session);
4763 dprintk("slot table reset returned %d\n", status);
4767 ptr = (unsigned *)&session->sess_id.data[0];
4768 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4769 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4771 /* Get the lease time */
4772 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4774 /* Update lease time and schedule renewal */
4775 spin_lock(&clp->cl_lock);
4776 clp->cl_lease_time = fsinfo.lease_time * HZ;
4777 clp->cl_last_renewal = jiffies;
4778 spin_unlock(&clp->cl_lock);
4780 nfs4_schedule_state_renewal(clp);
4783 dprintk("<-- %s\n", __func__);
4788 * Issue the over-the-wire RPC DESTROY_SESSION.
4789 * The caller must serialize access to this routine.
4791 int nfs4_proc_destroy_session(struct nfs4_session *session)
4794 struct rpc_message msg;
4796 dprintk("--> nfs4_proc_destroy_session\n");
4798 /* session is still being setup */
4799 if (session->clp->cl_cons_state != NFS_CS_READY)
4802 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4803 msg.rpc_argp = session;
4804 msg.rpc_resp = NULL;
4805 msg.rpc_cred = NULL;
4806 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4810 "Got error %d from the server on DESTROY_SESSION. "
4811 "Session has been destroyed regardless...\n", status);
4813 dprintk("<-- nfs4_proc_destroy_session\n");
4817 int nfs4_init_session(struct nfs_server *server)
4819 struct nfs_client *clp = server->nfs_client;
4820 struct nfs4_session *session;
4823 if (!nfs4_has_session(clp))
4826 session = clp->cl_session;
4827 session->fc_attrs.max_rqst_sz = server->wsize + nfs41_maxwrite_overhead;
4828 session->fc_attrs.max_resp_sz = server->rsize + nfs41_maxread_overhead;
4830 ret = nfs4_recover_expired_lease(server);
4832 ret = nfs4_check_client_ready(clp);
4837 * Renew the cl_session lease.
4839 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4841 struct nfs4_sequence_args args;
4842 struct nfs4_sequence_res res;
4844 struct rpc_message msg = {
4845 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4851 args.sa_cache_this = 0;
4853 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4857 void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4859 struct nfs_client *clp = (struct nfs_client *)data;
4861 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4863 if (task->tk_status < 0) {
4864 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4866 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4868 nfs4_restart_rpc(task, clp);
4872 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4874 kfree(task->tk_msg.rpc_argp);
4875 kfree(task->tk_msg.rpc_resp);
4877 dprintk("<-- %s\n", __func__);
4880 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4882 struct nfs_client *clp;
4883 struct nfs4_sequence_args *args;
4884 struct nfs4_sequence_res *res;
4886 clp = (struct nfs_client *)data;
4887 args = task->tk_msg.rpc_argp;
4888 res = task->tk_msg.rpc_resp;
4890 if (nfs4_setup_sequence(clp, args, res, 0, task))
4892 rpc_call_start(task);
4895 static const struct rpc_call_ops nfs41_sequence_ops = {
4896 .rpc_call_done = nfs41_sequence_call_done,
4897 .rpc_call_prepare = nfs41_sequence_prepare,
4900 static int nfs41_proc_async_sequence(struct nfs_client *clp,
4901 struct rpc_cred *cred)
4903 struct nfs4_sequence_args *args;
4904 struct nfs4_sequence_res *res;
4905 struct rpc_message msg = {
4906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4910 args = kzalloc(sizeof(*args), GFP_KERNEL);
4913 res = kzalloc(sizeof(*res), GFP_KERNEL);
4918 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4919 msg.rpc_argp = args;
4922 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4923 &nfs41_sequence_ops, (void *)clp);
4926 struct nfs4_reclaim_complete_data {
4927 struct nfs_client *clp;
4928 struct nfs41_reclaim_complete_args arg;
4929 struct nfs41_reclaim_complete_res res;
4932 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
4934 struct nfs4_reclaim_complete_data *calldata = data;
4936 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
4937 &calldata->res.seq_res, 0, task))
4940 rpc_call_start(task);
4943 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
4945 struct nfs4_reclaim_complete_data *calldata = data;
4946 struct nfs_client *clp = calldata->clp;
4947 struct nfs4_sequence_res *res = &calldata->res.seq_res;
4949 dprintk("--> %s\n", __func__);
4950 nfs41_sequence_done(clp, res, task->tk_status);
4951 switch (task->tk_status) {
4953 case -NFS4ERR_COMPLETE_ALREADY:
4955 case -NFS4ERR_BADSESSION:
4956 case -NFS4ERR_DEADSESSION:
4958 * Handle the session error, but do not retry the operation, as
4959 * we have no way of telling whether the clientid had to be
4960 * reset before we got our reply. If reset, a new wave of
4961 * reclaim operations will follow, containing their own reclaim
4962 * complete. We don't want our retry to get on the way of
4963 * recovery by incorrectly indicating to the server that we're
4964 * done reclaiming state since the process had to be restarted.
4966 _nfs4_async_handle_error(task, NULL, clp, NULL);
4969 if (_nfs4_async_handle_error(
4970 task, NULL, clp, NULL) == -EAGAIN) {
4971 rpc_restart_call_prepare(task);
4976 dprintk("<-- %s\n", __func__);
4979 static void nfs4_free_reclaim_complete_data(void *data)
4981 struct nfs4_reclaim_complete_data *calldata = data;
4986 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
4987 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
4988 .rpc_call_done = nfs4_reclaim_complete_done,
4989 .rpc_release = nfs4_free_reclaim_complete_data,
4993 * Issue a global reclaim complete.
4995 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
4997 struct nfs4_reclaim_complete_data *calldata;
4998 struct rpc_task *task;
4999 struct rpc_message msg = {
5000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5002 struct rpc_task_setup task_setup_data = {
5003 .rpc_client = clp->cl_rpcclient,
5004 .rpc_message = &msg,
5005 .callback_ops = &nfs4_reclaim_complete_call_ops,
5006 .flags = RPC_TASK_ASYNC,
5008 int status = -ENOMEM;
5010 dprintk("--> %s\n", __func__);
5011 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
5012 if (calldata == NULL)
5014 calldata->clp = clp;
5015 calldata->arg.one_fs = 0;
5016 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5018 msg.rpc_argp = &calldata->arg;
5019 msg.rpc_resp = &calldata->res;
5020 task_setup_data.callback_data = calldata;
5021 task = rpc_run_task(&task_setup_data);
5023 status = PTR_ERR(task);
5026 dprintk("<-- %s status=%d\n", __func__, status);
5029 #endif /* CONFIG_NFS_V4_1 */
5031 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
5032 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5033 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5034 .recover_open = nfs4_open_reclaim,
5035 .recover_lock = nfs4_lock_reclaim,
5036 .establish_clid = nfs4_init_clientid,
5037 .get_clid_cred = nfs4_get_setclientid_cred,
5040 #if defined(CONFIG_NFS_V4_1)
5041 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5042 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5043 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5044 .recover_open = nfs4_open_reclaim,
5045 .recover_lock = nfs4_lock_reclaim,
5046 .establish_clid = nfs41_init_clientid,
5047 .get_clid_cred = nfs4_get_exchange_id_cred,
5048 .reclaim_complete = nfs41_proc_reclaim_complete,
5050 #endif /* CONFIG_NFS_V4_1 */
5052 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5053 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5054 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5055 .recover_open = nfs4_open_expired,
5056 .recover_lock = nfs4_lock_expired,
5057 .establish_clid = nfs4_init_clientid,
5058 .get_clid_cred = nfs4_get_setclientid_cred,
5061 #if defined(CONFIG_NFS_V4_1)
5062 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
5063 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5064 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5065 .recover_open = nfs4_open_expired,
5066 .recover_lock = nfs4_lock_expired,
5067 .establish_clid = nfs41_init_clientid,
5068 .get_clid_cred = nfs4_get_exchange_id_cred,
5070 #endif /* CONFIG_NFS_V4_1 */
5072 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5073 .sched_state_renewal = nfs4_proc_async_renew,
5074 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
5075 .renew_lease = nfs4_proc_renew,
5078 #if defined(CONFIG_NFS_V4_1)
5079 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5080 .sched_state_renewal = nfs41_proc_async_sequence,
5081 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
5082 .renew_lease = nfs4_proc_sequence,
5087 * Per minor version reboot and network partition recovery ops
5090 struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5091 &nfs40_reboot_recovery_ops,
5092 #if defined(CONFIG_NFS_V4_1)
5093 &nfs41_reboot_recovery_ops,
5097 struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5098 &nfs40_nograce_recovery_ops,
5099 #if defined(CONFIG_NFS_V4_1)
5100 &nfs41_nograce_recovery_ops,
5104 struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5105 &nfs40_state_renewal_ops,
5106 #if defined(CONFIG_NFS_V4_1)
5107 &nfs41_state_renewal_ops,
5111 static const struct inode_operations nfs4_file_inode_operations = {
5112 .permission = nfs_permission,
5113 .getattr = nfs_getattr,
5114 .setattr = nfs_setattr,
5115 .getxattr = nfs4_getxattr,
5116 .setxattr = nfs4_setxattr,
5117 .listxattr = nfs4_listxattr,
5120 const struct nfs_rpc_ops nfs_v4_clientops = {
5121 .version = 4, /* protocol version */
5122 .dentry_ops = &nfs4_dentry_operations,
5123 .dir_inode_ops = &nfs4_dir_inode_operations,
5124 .file_inode_ops = &nfs4_file_inode_operations,
5125 .getroot = nfs4_proc_get_root,
5126 .getattr = nfs4_proc_getattr,
5127 .setattr = nfs4_proc_setattr,
5128 .lookupfh = nfs4_proc_lookupfh,
5129 .lookup = nfs4_proc_lookup,
5130 .access = nfs4_proc_access,
5131 .readlink = nfs4_proc_readlink,
5132 .create = nfs4_proc_create,
5133 .remove = nfs4_proc_remove,
5134 .unlink_setup = nfs4_proc_unlink_setup,
5135 .unlink_done = nfs4_proc_unlink_done,
5136 .rename = nfs4_proc_rename,
5137 .link = nfs4_proc_link,
5138 .symlink = nfs4_proc_symlink,
5139 .mkdir = nfs4_proc_mkdir,
5140 .rmdir = nfs4_proc_remove,
5141 .readdir = nfs4_proc_readdir,
5142 .mknod = nfs4_proc_mknod,
5143 .statfs = nfs4_proc_statfs,
5144 .fsinfo = nfs4_proc_fsinfo,
5145 .pathconf = nfs4_proc_pathconf,
5146 .set_capabilities = nfs4_server_capabilities,
5147 .decode_dirent = nfs4_decode_dirent,
5148 .read_setup = nfs4_proc_read_setup,
5149 .read_done = nfs4_read_done,
5150 .write_setup = nfs4_proc_write_setup,
5151 .write_done = nfs4_write_done,
5152 .commit_setup = nfs4_proc_commit_setup,
5153 .commit_done = nfs4_commit_done,
5154 .lock = nfs4_proc_lock,
5155 .clear_acl_cache = nfs4_zap_acl_attr,
5156 .close_context = nfs4_close_context,