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 >= 0 && 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);
369 spin_unlock(&tbl->slot_tbl_lock);
370 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
373 static void nfs41_sequence_done(struct nfs_client *clp,
374 struct nfs4_sequence_res *res,
377 unsigned long timestamp;
378 struct nfs4_slot_table *tbl;
379 struct nfs4_slot *slot;
382 * sr_status remains 1 if an RPC level error occurred. The server
383 * may or may not have processed the sequence operation..
384 * Proceed as if the server received and processed the sequence
387 if (res->sr_status == 1)
388 res->sr_status = NFS_OK;
390 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
391 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
394 /* Check the SEQUENCE operation status */
395 if (res->sr_status == 0) {
396 tbl = &clp->cl_session->fc_slot_table;
397 slot = tbl->slots + res->sr_slotid;
398 /* Update the slot's sequence and clientid lease timer */
400 timestamp = res->sr_renewal_time;
401 spin_lock(&clp->cl_lock);
402 if (time_before(clp->cl_last_renewal, timestamp))
403 clp->cl_last_renewal = timestamp;
404 spin_unlock(&clp->cl_lock);
405 /* Check sequence flags */
406 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
409 /* The session may be reset by one of the error handlers. */
410 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
411 nfs41_sequence_free_slot(clp, res);
415 * nfs4_find_slot - efficiently look for a free slot
417 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
418 * If found, we mark the slot as used, update the highest_used_slotid,
419 * and respectively set up the sequence operation args.
420 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
422 * Note: must be called with under the slot_tbl_lock.
425 nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
428 u8 ret_id = NFS4_MAX_SLOT_TABLE;
429 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
431 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
432 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
434 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
435 if (slotid >= tbl->max_slots)
437 __set_bit(slotid, tbl->used_slots);
438 if (slotid > tbl->highest_used_slotid)
439 tbl->highest_used_slotid = slotid;
442 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
443 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
447 static int nfs41_setup_sequence(struct nfs4_session *session,
448 struct nfs4_sequence_args *args,
449 struct nfs4_sequence_res *res,
451 struct rpc_task *task)
453 struct nfs4_slot *slot;
454 struct nfs4_slot_table *tbl;
457 dprintk("--> %s\n", __func__);
458 /* slot already allocated? */
459 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
462 memset(res, 0, sizeof(*res));
463 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
464 tbl = &session->fc_slot_table;
466 spin_lock(&tbl->slot_tbl_lock);
467 if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state)) {
469 * The state manager will wait until the slot table is empty.
470 * Schedule the reset thread
472 dprintk("%s Schedule Session Reset\n", __func__);
473 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
474 spin_unlock(&tbl->slot_tbl_lock);
478 slotid = nfs4_find_slot(tbl, task);
479 if (slotid == NFS4_MAX_SLOT_TABLE) {
480 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
481 spin_unlock(&tbl->slot_tbl_lock);
482 dprintk("<-- %s: no free slots\n", __func__);
485 spin_unlock(&tbl->slot_tbl_lock);
487 slot = tbl->slots + slotid;
488 args->sa_session = session;
489 args->sa_slotid = slotid;
490 args->sa_cache_this = cache_reply;
492 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
494 res->sr_session = session;
495 res->sr_slotid = slotid;
496 res->sr_renewal_time = jiffies;
498 * sr_status is only set in decode_sequence, and so will remain
499 * set to 1 if an rpc level failure occurs.
505 int nfs4_setup_sequence(struct nfs_client *clp,
506 struct nfs4_sequence_args *args,
507 struct nfs4_sequence_res *res,
509 struct rpc_task *task)
513 dprintk("--> %s clp %p session %p sr_slotid %d\n",
514 __func__, clp, clp->cl_session, res->sr_slotid);
516 if (!nfs4_has_session(clp))
518 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
520 if (ret && ret != -EAGAIN) {
521 /* terminate rpc task */
522 task->tk_status = ret;
523 task->tk_action = NULL;
526 dprintk("<-- %s status=%d\n", __func__, ret);
530 struct nfs41_call_sync_data {
531 struct nfs_client *clp;
532 struct nfs4_sequence_args *seq_args;
533 struct nfs4_sequence_res *seq_res;
537 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
539 struct nfs41_call_sync_data *data = calldata;
541 dprintk("--> %s data->clp->cl_session %p\n", __func__,
542 data->clp->cl_session);
543 if (nfs4_setup_sequence(data->clp, data->seq_args,
544 data->seq_res, data->cache_reply, task))
546 rpc_call_start(task);
549 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
551 struct nfs41_call_sync_data *data = calldata;
553 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
556 struct rpc_call_ops nfs41_call_sync_ops = {
557 .rpc_call_prepare = nfs41_call_sync_prepare,
558 .rpc_call_done = nfs41_call_sync_done,
561 static int nfs4_call_sync_sequence(struct nfs_client *clp,
562 struct rpc_clnt *clnt,
563 struct rpc_message *msg,
564 struct nfs4_sequence_args *args,
565 struct nfs4_sequence_res *res,
569 struct rpc_task *task;
570 struct nfs41_call_sync_data data = {
574 .cache_reply = cache_reply,
576 struct rpc_task_setup task_setup = {
579 .callback_ops = &nfs41_call_sync_ops,
580 .callback_data = &data
583 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
584 task = rpc_run_task(&task_setup);
588 ret = task->tk_status;
594 int _nfs4_call_sync_session(struct nfs_server *server,
595 struct rpc_message *msg,
596 struct nfs4_sequence_args *args,
597 struct nfs4_sequence_res *res,
600 return nfs4_call_sync_sequence(server->nfs_client, server->client,
601 msg, args, res, cache_reply);
604 #endif /* CONFIG_NFS_V4_1 */
606 int _nfs4_call_sync(struct nfs_server *server,
607 struct rpc_message *msg,
608 struct nfs4_sequence_args *args,
609 struct nfs4_sequence_res *res,
612 args->sa_session = res->sr_session = NULL;
613 return rpc_call_sync(server->client, msg, 0);
616 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
617 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
618 &(res)->seq_res, (cache_reply))
620 static void nfs4_sequence_done(const struct nfs_server *server,
621 struct nfs4_sequence_res *res, int rpc_status)
623 #ifdef CONFIG_NFS_V4_1
624 if (nfs4_has_session(server->nfs_client))
625 nfs41_sequence_done(server->nfs_client, res, rpc_status);
626 #endif /* CONFIG_NFS_V4_1 */
629 void nfs4_restart_rpc(struct rpc_task *task, const struct nfs_client *clp)
631 #ifdef CONFIG_NFS_V4_1
632 if (nfs4_has_session(clp)) {
633 rpc_restart_call_prepare(task);
636 #endif /* CONFIG_NFS_V4_1 */
637 rpc_restart_call(task);
640 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
642 struct nfs_inode *nfsi = NFS_I(dir);
644 spin_lock(&dir->i_lock);
645 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
646 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
647 nfs_force_lookup_revalidate(dir);
648 nfsi->change_attr = cinfo->after;
649 spin_unlock(&dir->i_lock);
652 struct nfs4_opendata {
654 struct nfs_openargs o_arg;
655 struct nfs_openres o_res;
656 struct nfs_open_confirmargs c_arg;
657 struct nfs_open_confirmres c_res;
658 struct nfs_fattr f_attr;
659 struct nfs_fattr dir_attr;
662 struct nfs4_state_owner *owner;
663 struct nfs4_state *state;
665 unsigned long timestamp;
666 unsigned int rpc_done : 1;
672 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
674 p->o_res.f_attr = &p->f_attr;
675 p->o_res.dir_attr = &p->dir_attr;
676 p->o_res.seqid = p->o_arg.seqid;
677 p->c_res.seqid = p->c_arg.seqid;
678 p->o_res.server = p->o_arg.server;
679 nfs_fattr_init(&p->f_attr);
680 nfs_fattr_init(&p->dir_attr);
681 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
684 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
685 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
686 const struct iattr *attrs)
688 struct dentry *parent = dget_parent(path->dentry);
689 struct inode *dir = parent->d_inode;
690 struct nfs_server *server = NFS_SERVER(dir);
691 struct nfs4_opendata *p;
693 p = kzalloc(sizeof(*p), GFP_KERNEL);
696 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
697 if (p->o_arg.seqid == NULL)
699 p->path.mnt = mntget(path->mnt);
700 p->path.dentry = dget(path->dentry);
703 atomic_inc(&sp->so_count);
704 p->o_arg.fh = NFS_FH(dir);
705 p->o_arg.open_flags = flags;
706 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
707 p->o_arg.clientid = server->nfs_client->cl_clientid;
708 p->o_arg.id = sp->so_owner_id.id;
709 p->o_arg.name = &p->path.dentry->d_name;
710 p->o_arg.server = server;
711 p->o_arg.bitmask = server->attr_bitmask;
712 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
713 if (flags & O_EXCL) {
714 if (nfs4_has_persistent_session(server->nfs_client)) {
716 p->o_arg.u.attrs = &p->attrs;
717 memcpy(&p->attrs, attrs, sizeof(p->attrs));
718 } else { /* EXCLUSIVE4_1 */
719 u32 *s = (u32 *) p->o_arg.u.verifier.data;
723 } else if (flags & O_CREAT) {
724 p->o_arg.u.attrs = &p->attrs;
725 memcpy(&p->attrs, attrs, sizeof(p->attrs));
727 p->c_arg.fh = &p->o_res.fh;
728 p->c_arg.stateid = &p->o_res.stateid;
729 p->c_arg.seqid = p->o_arg.seqid;
730 nfs4_init_opendata_res(p);
740 static void nfs4_opendata_free(struct kref *kref)
742 struct nfs4_opendata *p = container_of(kref,
743 struct nfs4_opendata, kref);
745 nfs_free_seqid(p->o_arg.seqid);
746 if (p->state != NULL)
747 nfs4_put_open_state(p->state);
748 nfs4_put_state_owner(p->owner);
754 static void nfs4_opendata_put(struct nfs4_opendata *p)
757 kref_put(&p->kref, nfs4_opendata_free);
760 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
764 ret = rpc_wait_for_completion_task(task);
768 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
772 if (open_mode & O_EXCL)
774 switch (mode & (FMODE_READ|FMODE_WRITE)) {
776 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
779 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
781 case FMODE_READ|FMODE_WRITE:
782 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
788 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
790 if ((delegation->type & fmode) != fmode)
792 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
794 nfs_mark_delegation_referenced(delegation);
798 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
807 case FMODE_READ|FMODE_WRITE:
810 nfs4_state_set_mode_locked(state, state->state | fmode);
813 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
815 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
816 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
817 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
820 set_bit(NFS_O_RDONLY_STATE, &state->flags);
823 set_bit(NFS_O_WRONLY_STATE, &state->flags);
825 case FMODE_READ|FMODE_WRITE:
826 set_bit(NFS_O_RDWR_STATE, &state->flags);
830 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
832 write_seqlock(&state->seqlock);
833 nfs_set_open_stateid_locked(state, stateid, fmode);
834 write_sequnlock(&state->seqlock);
837 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
840 * Protect the call to nfs4_state_set_mode_locked and
841 * serialise the stateid update
843 write_seqlock(&state->seqlock);
844 if (deleg_stateid != NULL) {
845 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
846 set_bit(NFS_DELEGATED_STATE, &state->flags);
848 if (open_stateid != NULL)
849 nfs_set_open_stateid_locked(state, open_stateid, fmode);
850 write_sequnlock(&state->seqlock);
851 spin_lock(&state->owner->so_lock);
852 update_open_stateflags(state, fmode);
853 spin_unlock(&state->owner->so_lock);
856 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
858 struct nfs_inode *nfsi = NFS_I(state->inode);
859 struct nfs_delegation *deleg_cur;
862 fmode &= (FMODE_READ|FMODE_WRITE);
865 deleg_cur = rcu_dereference(nfsi->delegation);
866 if (deleg_cur == NULL)
869 spin_lock(&deleg_cur->lock);
870 if (nfsi->delegation != deleg_cur ||
871 (deleg_cur->type & fmode) != fmode)
872 goto no_delegation_unlock;
874 if (delegation == NULL)
875 delegation = &deleg_cur->stateid;
876 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
877 goto no_delegation_unlock;
879 nfs_mark_delegation_referenced(deleg_cur);
880 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
882 no_delegation_unlock:
883 spin_unlock(&deleg_cur->lock);
887 if (!ret && open_stateid != NULL) {
888 __update_open_stateid(state, open_stateid, NULL, fmode);
896 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
898 struct nfs_delegation *delegation;
901 delegation = rcu_dereference(NFS_I(inode)->delegation);
902 if (delegation == NULL || (delegation->type & fmode) == fmode) {
907 nfs_inode_return_delegation(inode);
910 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
912 struct nfs4_state *state = opendata->state;
913 struct nfs_inode *nfsi = NFS_I(state->inode);
914 struct nfs_delegation *delegation;
915 int open_mode = opendata->o_arg.open_flags & O_EXCL;
916 fmode_t fmode = opendata->o_arg.fmode;
917 nfs4_stateid stateid;
921 if (can_open_cached(state, fmode, open_mode)) {
922 spin_lock(&state->owner->so_lock);
923 if (can_open_cached(state, fmode, open_mode)) {
924 update_open_stateflags(state, fmode);
925 spin_unlock(&state->owner->so_lock);
926 goto out_return_state;
928 spin_unlock(&state->owner->so_lock);
931 delegation = rcu_dereference(nfsi->delegation);
932 if (delegation == NULL ||
933 !can_open_delegated(delegation, fmode)) {
937 /* Save the delegation */
938 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
940 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
945 /* Try to update the stateid using the delegation */
946 if (update_open_stateid(state, NULL, &stateid, fmode))
947 goto out_return_state;
952 atomic_inc(&state->count);
956 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
959 struct nfs4_state *state = NULL;
960 struct nfs_delegation *delegation;
963 if (!data->rpc_done) {
964 state = nfs4_try_open_cached(data);
969 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
971 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
972 ret = PTR_ERR(inode);
976 state = nfs4_get_open_state(inode, data->owner);
979 if (data->o_res.delegation_type != 0) {
980 int delegation_flags = 0;
983 delegation = rcu_dereference(NFS_I(inode)->delegation);
985 delegation_flags = delegation->flags;
987 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
988 nfs_inode_set_delegation(state->inode,
989 data->owner->so_cred,
992 nfs_inode_reclaim_delegation(state->inode,
993 data->owner->so_cred,
997 update_open_stateid(state, &data->o_res.stateid, NULL,
1005 return ERR_PTR(ret);
1008 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1010 struct nfs_inode *nfsi = NFS_I(state->inode);
1011 struct nfs_open_context *ctx;
1013 spin_lock(&state->inode->i_lock);
1014 list_for_each_entry(ctx, &nfsi->open_files, list) {
1015 if (ctx->state != state)
1017 get_nfs_open_context(ctx);
1018 spin_unlock(&state->inode->i_lock);
1021 spin_unlock(&state->inode->i_lock);
1022 return ERR_PTR(-ENOENT);
1025 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1027 struct nfs4_opendata *opendata;
1029 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
1030 if (opendata == NULL)
1031 return ERR_PTR(-ENOMEM);
1032 opendata->state = state;
1033 atomic_inc(&state->count);
1037 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1039 struct nfs4_state *newstate;
1042 opendata->o_arg.open_flags = 0;
1043 opendata->o_arg.fmode = fmode;
1044 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1045 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1046 nfs4_init_opendata_res(opendata);
1047 ret = _nfs4_proc_open(opendata);
1050 newstate = nfs4_opendata_to_nfs4_state(opendata);
1051 if (IS_ERR(newstate))
1052 return PTR_ERR(newstate);
1053 nfs4_close_state(&opendata->path, newstate, fmode);
1058 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1060 struct nfs4_state *newstate;
1063 /* memory barrier prior to reading state->n_* */
1064 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1066 if (state->n_rdwr != 0) {
1067 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1070 if (newstate != state)
1073 if (state->n_wronly != 0) {
1074 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1077 if (newstate != state)
1080 if (state->n_rdonly != 0) {
1081 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1084 if (newstate != state)
1088 * We may have performed cached opens for all three recoveries.
1089 * Check if we need to update the current stateid.
1091 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1092 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1093 write_seqlock(&state->seqlock);
1094 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1095 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1096 write_sequnlock(&state->seqlock);
1103 * reclaim state on the server after a reboot.
1105 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1107 struct nfs_delegation *delegation;
1108 struct nfs4_opendata *opendata;
1109 fmode_t delegation_type = 0;
1112 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1113 if (IS_ERR(opendata))
1114 return PTR_ERR(opendata);
1115 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1116 opendata->o_arg.fh = NFS_FH(state->inode);
1118 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1119 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1120 delegation_type = delegation->type;
1122 opendata->o_arg.u.delegation_type = delegation_type;
1123 status = nfs4_open_recover(opendata, state);
1124 nfs4_opendata_put(opendata);
1128 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1130 struct nfs_server *server = NFS_SERVER(state->inode);
1131 struct nfs4_exception exception = { };
1134 err = _nfs4_do_open_reclaim(ctx, state);
1135 if (err != -NFS4ERR_DELAY)
1137 nfs4_handle_exception(server, err, &exception);
1138 } while (exception.retry);
1142 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1144 struct nfs_open_context *ctx;
1147 ctx = nfs4_state_find_open_context(state);
1149 return PTR_ERR(ctx);
1150 ret = nfs4_do_open_reclaim(ctx, state);
1151 put_nfs_open_context(ctx);
1155 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1157 struct nfs4_opendata *opendata;
1160 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1161 if (IS_ERR(opendata))
1162 return PTR_ERR(opendata);
1163 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1164 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1165 sizeof(opendata->o_arg.u.delegation.data));
1166 ret = nfs4_open_recover(opendata, state);
1167 nfs4_opendata_put(opendata);
1171 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1173 struct nfs4_exception exception = { };
1174 struct nfs_server *server = NFS_SERVER(state->inode);
1177 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1183 case -NFS4ERR_STALE_CLIENTID:
1184 case -NFS4ERR_STALE_STATEID:
1185 case -NFS4ERR_EXPIRED:
1186 /* Don't recall a delegation if it was lost */
1187 nfs4_schedule_state_recovery(server->nfs_client);
1191 * The show must go on: exit, but mark the
1192 * stateid as needing recovery.
1194 case -NFS4ERR_ADMIN_REVOKED:
1195 case -NFS4ERR_BAD_STATEID:
1196 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1201 err = nfs4_handle_exception(server, err, &exception);
1202 } while (exception.retry);
1207 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1209 struct nfs4_opendata *data = calldata;
1211 data->rpc_status = task->tk_status;
1212 if (RPC_ASSASSINATED(task))
1214 if (data->rpc_status == 0) {
1215 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1216 sizeof(data->o_res.stateid.data));
1217 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1218 renew_lease(data->o_res.server, data->timestamp);
1223 static void nfs4_open_confirm_release(void *calldata)
1225 struct nfs4_opendata *data = calldata;
1226 struct nfs4_state *state = NULL;
1228 /* If this request hasn't been cancelled, do nothing */
1229 if (data->cancelled == 0)
1231 /* In case of error, no cleanup! */
1232 if (!data->rpc_done)
1234 state = nfs4_opendata_to_nfs4_state(data);
1236 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1238 nfs4_opendata_put(data);
1241 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1242 .rpc_call_done = nfs4_open_confirm_done,
1243 .rpc_release = nfs4_open_confirm_release,
1247 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1249 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1251 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1252 struct rpc_task *task;
1253 struct rpc_message msg = {
1254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1255 .rpc_argp = &data->c_arg,
1256 .rpc_resp = &data->c_res,
1257 .rpc_cred = data->owner->so_cred,
1259 struct rpc_task_setup task_setup_data = {
1260 .rpc_client = server->client,
1261 .rpc_message = &msg,
1262 .callback_ops = &nfs4_open_confirm_ops,
1263 .callback_data = data,
1264 .workqueue = nfsiod_workqueue,
1265 .flags = RPC_TASK_ASYNC,
1269 kref_get(&data->kref);
1271 data->rpc_status = 0;
1272 data->timestamp = jiffies;
1273 task = rpc_run_task(&task_setup_data);
1275 return PTR_ERR(task);
1276 status = nfs4_wait_for_completion_rpc_task(task);
1278 data->cancelled = 1;
1281 status = data->rpc_status;
1286 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1288 struct nfs4_opendata *data = calldata;
1289 struct nfs4_state_owner *sp = data->owner;
1291 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1294 * Check if we still need to send an OPEN call, or if we can use
1295 * a delegation instead.
1297 if (data->state != NULL) {
1298 struct nfs_delegation *delegation;
1300 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1303 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1304 if (delegation != NULL &&
1305 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1311 /* Update sequence id. */
1312 data->o_arg.id = sp->so_owner_id.id;
1313 data->o_arg.clientid = sp->so_client->cl_clientid;
1314 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1315 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1316 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1318 data->timestamp = jiffies;
1319 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1320 &data->o_arg.seq_args,
1321 &data->o_res.seq_res, 1, task))
1323 rpc_call_start(task);
1326 task->tk_action = NULL;
1330 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1332 struct nfs4_opendata *data = calldata;
1334 data->rpc_status = task->tk_status;
1336 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1339 if (RPC_ASSASSINATED(task))
1341 if (task->tk_status == 0) {
1342 switch (data->o_res.f_attr->mode & S_IFMT) {
1346 data->rpc_status = -ELOOP;
1349 data->rpc_status = -EISDIR;
1352 data->rpc_status = -ENOTDIR;
1354 renew_lease(data->o_res.server, data->timestamp);
1355 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1356 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1361 static void nfs4_open_release(void *calldata)
1363 struct nfs4_opendata *data = calldata;
1364 struct nfs4_state *state = NULL;
1366 /* If this request hasn't been cancelled, do nothing */
1367 if (data->cancelled == 0)
1369 /* In case of error, no cleanup! */
1370 if (data->rpc_status != 0 || !data->rpc_done)
1372 /* In case we need an open_confirm, no cleanup! */
1373 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1375 state = nfs4_opendata_to_nfs4_state(data);
1377 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1379 nfs4_opendata_put(data);
1382 static const struct rpc_call_ops nfs4_open_ops = {
1383 .rpc_call_prepare = nfs4_open_prepare,
1384 .rpc_call_done = nfs4_open_done,
1385 .rpc_release = nfs4_open_release,
1389 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1391 static int _nfs4_proc_open(struct nfs4_opendata *data)
1393 struct inode *dir = data->dir->d_inode;
1394 struct nfs_server *server = NFS_SERVER(dir);
1395 struct nfs_openargs *o_arg = &data->o_arg;
1396 struct nfs_openres *o_res = &data->o_res;
1397 struct rpc_task *task;
1398 struct rpc_message msg = {
1399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1402 .rpc_cred = data->owner->so_cred,
1404 struct rpc_task_setup task_setup_data = {
1405 .rpc_client = server->client,
1406 .rpc_message = &msg,
1407 .callback_ops = &nfs4_open_ops,
1408 .callback_data = data,
1409 .workqueue = nfsiod_workqueue,
1410 .flags = RPC_TASK_ASYNC,
1414 kref_get(&data->kref);
1416 data->rpc_status = 0;
1417 data->cancelled = 0;
1418 task = rpc_run_task(&task_setup_data);
1420 return PTR_ERR(task);
1421 status = nfs4_wait_for_completion_rpc_task(task);
1423 data->cancelled = 1;
1426 status = data->rpc_status;
1428 if (status != 0 || !data->rpc_done)
1431 if (o_res->fh.size == 0)
1432 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1434 if (o_arg->open_flags & O_CREAT) {
1435 update_changeattr(dir, &o_res->cinfo);
1436 nfs_post_op_update_inode(dir, o_res->dir_attr);
1438 nfs_refresh_inode(dir, o_res->dir_attr);
1439 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1440 status = _nfs4_proc_open_confirm(data);
1444 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1445 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1449 static int nfs4_recover_expired_lease(struct nfs_server *server)
1451 struct nfs_client *clp = server->nfs_client;
1455 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1456 ret = nfs4_wait_clnt_recover(clp);
1459 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1460 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1462 nfs4_schedule_state_recovery(clp);
1470 * reclaim state on the server after a network partition.
1471 * Assumes caller holds the appropriate lock
1473 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1475 struct nfs4_opendata *opendata;
1478 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1479 if (IS_ERR(opendata))
1480 return PTR_ERR(opendata);
1481 ret = nfs4_open_recover(opendata, state);
1483 d_drop(ctx->path.dentry);
1484 nfs4_opendata_put(opendata);
1488 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1490 struct nfs_server *server = NFS_SERVER(state->inode);
1491 struct nfs4_exception exception = { };
1495 err = _nfs4_open_expired(ctx, state);
1499 case -NFS4ERR_GRACE:
1500 case -NFS4ERR_DELAY:
1501 nfs4_handle_exception(server, err, &exception);
1504 } while (exception.retry);
1509 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1511 struct nfs_open_context *ctx;
1514 ctx = nfs4_state_find_open_context(state);
1516 return PTR_ERR(ctx);
1517 ret = nfs4_do_open_expired(ctx, state);
1518 put_nfs_open_context(ctx);
1523 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1524 * fields corresponding to attributes that were used to store the verifier.
1525 * Make sure we clobber those fields in the later setattr call
1527 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1529 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1530 !(sattr->ia_valid & ATTR_ATIME_SET))
1531 sattr->ia_valid |= ATTR_ATIME;
1533 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1534 !(sattr->ia_valid & ATTR_MTIME_SET))
1535 sattr->ia_valid |= ATTR_MTIME;
1539 * Returns a referenced nfs4_state
1541 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)
1543 struct nfs4_state_owner *sp;
1544 struct nfs4_state *state = NULL;
1545 struct nfs_server *server = NFS_SERVER(dir);
1546 struct nfs4_opendata *opendata;
1549 /* Protect against reboot recovery conflicts */
1551 if (!(sp = nfs4_get_state_owner(server, cred))) {
1552 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1555 status = nfs4_recover_expired_lease(server);
1557 goto err_put_state_owner;
1558 if (path->dentry->d_inode != NULL)
1559 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1561 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1562 if (opendata == NULL)
1563 goto err_put_state_owner;
1565 if (path->dentry->d_inode != NULL)
1566 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1568 status = _nfs4_proc_open(opendata);
1570 goto err_opendata_put;
1572 if (opendata->o_arg.open_flags & O_EXCL)
1573 nfs4_exclusive_attrset(opendata, sattr);
1575 state = nfs4_opendata_to_nfs4_state(opendata);
1576 status = PTR_ERR(state);
1578 goto err_opendata_put;
1579 nfs4_opendata_put(opendata);
1580 nfs4_put_state_owner(sp);
1584 nfs4_opendata_put(opendata);
1585 err_put_state_owner:
1586 nfs4_put_state_owner(sp);
1593 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)
1595 struct nfs4_exception exception = { };
1596 struct nfs4_state *res;
1600 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1603 /* NOTE: BAD_SEQID means the server and client disagree about the
1604 * book-keeping w.r.t. state-changing operations
1605 * (OPEN/CLOSE/LOCK/LOCKU...)
1606 * It is actually a sign of a bug on the client or on the server.
1608 * If we receive a BAD_SEQID error in the particular case of
1609 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1610 * have unhashed the old state_owner for us, and that we can
1611 * therefore safely retry using a new one. We should still warn
1612 * the user though...
1614 if (status == -NFS4ERR_BAD_SEQID) {
1615 printk(KERN_WARNING "NFS: v4 server %s "
1616 " returned a bad sequence-id error!\n",
1617 NFS_SERVER(dir)->nfs_client->cl_hostname);
1618 exception.retry = 1;
1622 * BAD_STATEID on OPEN means that the server cancelled our
1623 * state before it received the OPEN_CONFIRM.
1624 * Recover by retrying the request as per the discussion
1625 * on Page 181 of RFC3530.
1627 if (status == -NFS4ERR_BAD_STATEID) {
1628 exception.retry = 1;
1631 if (status == -EAGAIN) {
1632 /* We must have found a delegation */
1633 exception.retry = 1;
1636 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1637 status, &exception));
1638 } while (exception.retry);
1642 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1643 struct nfs_fattr *fattr, struct iattr *sattr,
1644 struct nfs4_state *state)
1646 struct nfs_server *server = NFS_SERVER(inode);
1647 struct nfs_setattrargs arg = {
1648 .fh = NFS_FH(inode),
1651 .bitmask = server->attr_bitmask,
1653 struct nfs_setattrres res = {
1657 struct rpc_message msg = {
1658 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1663 unsigned long timestamp = jiffies;
1666 nfs_fattr_init(fattr);
1668 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1669 /* Use that stateid */
1670 } else if (state != NULL) {
1671 nfs4_copy_stateid(&arg.stateid, state, current->files);
1673 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1675 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1676 if (status == 0 && state != NULL)
1677 renew_lease(server, timestamp);
1681 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1682 struct nfs_fattr *fattr, struct iattr *sattr,
1683 struct nfs4_state *state)
1685 struct nfs_server *server = NFS_SERVER(inode);
1686 struct nfs4_exception exception = { };
1689 err = nfs4_handle_exception(server,
1690 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1692 } while (exception.retry);
1696 struct nfs4_closedata {
1698 struct inode *inode;
1699 struct nfs4_state *state;
1700 struct nfs_closeargs arg;
1701 struct nfs_closeres res;
1702 struct nfs_fattr fattr;
1703 unsigned long timestamp;
1706 static void nfs4_free_closedata(void *data)
1708 struct nfs4_closedata *calldata = data;
1709 struct nfs4_state_owner *sp = calldata->state->owner;
1711 nfs4_put_open_state(calldata->state);
1712 nfs_free_seqid(calldata->arg.seqid);
1713 nfs4_put_state_owner(sp);
1714 path_put(&calldata->path);
1718 static void nfs4_close_done(struct rpc_task *task, void *data)
1720 struct nfs4_closedata *calldata = data;
1721 struct nfs4_state *state = calldata->state;
1722 struct nfs_server *server = NFS_SERVER(calldata->inode);
1724 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
1725 if (RPC_ASSASSINATED(task))
1727 /* hmm. we are done with the inode, and in the process of freeing
1728 * the state_owner. we keep this around to process errors
1730 switch (task->tk_status) {
1732 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1733 renew_lease(server, calldata->timestamp);
1735 case -NFS4ERR_STALE_STATEID:
1736 case -NFS4ERR_OLD_STATEID:
1737 case -NFS4ERR_BAD_STATEID:
1738 case -NFS4ERR_EXPIRED:
1739 if (calldata->arg.fmode == 0)
1742 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1743 nfs4_restart_rpc(task, server->nfs_client);
1747 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1750 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1752 struct nfs4_closedata *calldata = data;
1753 struct nfs4_state *state = calldata->state;
1754 int clear_rd, clear_wr, clear_rdwr;
1756 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1759 clear_rd = clear_wr = clear_rdwr = 0;
1760 spin_lock(&state->owner->so_lock);
1761 /* Calculate the change in open mode */
1762 if (state->n_rdwr == 0) {
1763 if (state->n_rdonly == 0) {
1764 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1765 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1767 if (state->n_wronly == 0) {
1768 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1769 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1772 spin_unlock(&state->owner->so_lock);
1773 if (!clear_rd && !clear_wr && !clear_rdwr) {
1774 /* Note: exit _without_ calling nfs4_close_done */
1775 task->tk_action = NULL;
1778 nfs_fattr_init(calldata->res.fattr);
1779 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1780 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1781 calldata->arg.fmode = FMODE_READ;
1782 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1783 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1784 calldata->arg.fmode = FMODE_WRITE;
1786 calldata->timestamp = jiffies;
1787 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1788 &calldata->arg.seq_args, &calldata->res.seq_res,
1791 rpc_call_start(task);
1794 static const struct rpc_call_ops nfs4_close_ops = {
1795 .rpc_call_prepare = nfs4_close_prepare,
1796 .rpc_call_done = nfs4_close_done,
1797 .rpc_release = nfs4_free_closedata,
1801 * It is possible for data to be read/written from a mem-mapped file
1802 * after the sys_close call (which hits the vfs layer as a flush).
1803 * This means that we can't safely call nfsv4 close on a file until
1804 * the inode is cleared. This in turn means that we are not good
1805 * NFSv4 citizens - we do not indicate to the server to update the file's
1806 * share state even when we are done with one of the three share
1807 * stateid's in the inode.
1809 * NOTE: Caller must be holding the sp->so_owner semaphore!
1811 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1813 struct nfs_server *server = NFS_SERVER(state->inode);
1814 struct nfs4_closedata *calldata;
1815 struct nfs4_state_owner *sp = state->owner;
1816 struct rpc_task *task;
1817 struct rpc_message msg = {
1818 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1819 .rpc_cred = state->owner->so_cred,
1821 struct rpc_task_setup task_setup_data = {
1822 .rpc_client = server->client,
1823 .rpc_message = &msg,
1824 .callback_ops = &nfs4_close_ops,
1825 .workqueue = nfsiod_workqueue,
1826 .flags = RPC_TASK_ASYNC,
1828 int status = -ENOMEM;
1830 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1831 if (calldata == NULL)
1833 calldata->inode = state->inode;
1834 calldata->state = state;
1835 calldata->arg.fh = NFS_FH(state->inode);
1836 calldata->arg.stateid = &state->open_stateid;
1837 if (nfs4_has_session(server->nfs_client))
1838 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1839 /* Serialization for the sequence id */
1840 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1841 if (calldata->arg.seqid == NULL)
1842 goto out_free_calldata;
1843 calldata->arg.fmode = 0;
1844 calldata->arg.bitmask = server->cache_consistency_bitmask;
1845 calldata->res.fattr = &calldata->fattr;
1846 calldata->res.seqid = calldata->arg.seqid;
1847 calldata->res.server = server;
1848 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
1849 calldata->path.mnt = mntget(path->mnt);
1850 calldata->path.dentry = dget(path->dentry);
1852 msg.rpc_argp = &calldata->arg,
1853 msg.rpc_resp = &calldata->res,
1854 task_setup_data.callback_data = calldata;
1855 task = rpc_run_task(&task_setup_data);
1857 return PTR_ERR(task);
1860 status = rpc_wait_for_completion_task(task);
1866 nfs4_put_open_state(state);
1867 nfs4_put_state_owner(sp);
1871 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1876 /* If the open_intent is for execute, we have an extra check to make */
1877 if (fmode & FMODE_EXEC) {
1878 ret = nfs_may_open(state->inode,
1879 state->owner->so_cred,
1880 nd->intent.open.flags);
1884 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1885 if (!IS_ERR(filp)) {
1886 struct nfs_open_context *ctx;
1887 ctx = nfs_file_open_context(filp);
1891 ret = PTR_ERR(filp);
1893 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1898 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1900 struct path path = {
1901 .mnt = nd->path.mnt,
1904 struct dentry *parent;
1906 struct rpc_cred *cred;
1907 struct nfs4_state *state;
1909 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1911 if (nd->flags & LOOKUP_CREATE) {
1912 attr.ia_mode = nd->intent.open.create_mode;
1913 attr.ia_valid = ATTR_MODE;
1914 if (!IS_POSIXACL(dir))
1915 attr.ia_mode &= ~current_umask();
1918 BUG_ON(nd->intent.open.flags & O_CREAT);
1921 cred = rpc_lookup_cred();
1923 return (struct dentry *)cred;
1924 parent = dentry->d_parent;
1925 /* Protect against concurrent sillydeletes */
1926 nfs_block_sillyrename(parent);
1927 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1929 if (IS_ERR(state)) {
1930 if (PTR_ERR(state) == -ENOENT) {
1931 d_add(dentry, NULL);
1932 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1934 nfs_unblock_sillyrename(parent);
1935 return (struct dentry *)state;
1937 res = d_add_unique(dentry, igrab(state->inode));
1940 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1941 nfs_unblock_sillyrename(parent);
1942 nfs4_intent_set_file(nd, &path, state, fmode);
1947 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1949 struct path path = {
1950 .mnt = nd->path.mnt,
1953 struct rpc_cred *cred;
1954 struct nfs4_state *state;
1955 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1957 cred = rpc_lookup_cred();
1959 return PTR_ERR(cred);
1960 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1962 if (IS_ERR(state)) {
1963 switch (PTR_ERR(state)) {
1969 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1975 if (state->inode == dentry->d_inode) {
1976 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1977 nfs4_intent_set_file(nd, &path, state, fmode);
1980 nfs4_close_sync(&path, state, fmode);
1986 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1988 if (ctx->state == NULL)
1991 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1993 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1996 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1998 struct nfs4_server_caps_arg args = {
2001 struct nfs4_server_caps_res res = {};
2002 struct rpc_message msg = {
2003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2009 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2011 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2012 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2013 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2014 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2015 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2016 NFS_CAP_CTIME|NFS_CAP_MTIME);
2017 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2018 server->caps |= NFS_CAP_ACLS;
2019 if (res.has_links != 0)
2020 server->caps |= NFS_CAP_HARDLINKS;
2021 if (res.has_symlinks != 0)
2022 server->caps |= NFS_CAP_SYMLINKS;
2023 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2024 server->caps |= NFS_CAP_FILEID;
2025 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2026 server->caps |= NFS_CAP_MODE;
2027 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2028 server->caps |= NFS_CAP_NLINK;
2029 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2030 server->caps |= NFS_CAP_OWNER;
2031 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2032 server->caps |= NFS_CAP_OWNER_GROUP;
2033 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2034 server->caps |= NFS_CAP_ATIME;
2035 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2036 server->caps |= NFS_CAP_CTIME;
2037 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2038 server->caps |= NFS_CAP_MTIME;
2040 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2041 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2042 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2043 server->acl_bitmask = res.acl_bitmask;
2049 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2051 struct nfs4_exception exception = { };
2054 err = nfs4_handle_exception(server,
2055 _nfs4_server_capabilities(server, fhandle),
2057 } while (exception.retry);
2061 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2062 struct nfs_fsinfo *info)
2064 struct nfs4_lookup_root_arg args = {
2065 .bitmask = nfs4_fattr_bitmap,
2067 struct nfs4_lookup_res res = {
2069 .fattr = info->fattr,
2072 struct rpc_message msg = {
2073 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2078 nfs_fattr_init(info->fattr);
2079 return nfs4_call_sync(server, &msg, &args, &res, 0);
2082 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2083 struct nfs_fsinfo *info)
2085 struct nfs4_exception exception = { };
2088 err = nfs4_handle_exception(server,
2089 _nfs4_lookup_root(server, fhandle, info),
2091 } while (exception.retry);
2096 * get the file handle for the "/" directory on the server
2098 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2099 struct nfs_fsinfo *info)
2103 status = nfs4_lookup_root(server, fhandle, info);
2105 status = nfs4_server_capabilities(server, fhandle);
2107 status = nfs4_do_fsinfo(server, fhandle, info);
2108 return nfs4_map_errors(status);
2112 * Get locations and (maybe) other attributes of a referral.
2113 * Note that we'll actually follow the referral later when
2114 * we detect fsid mismatch in inode revalidation
2116 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2118 int status = -ENOMEM;
2119 struct page *page = NULL;
2120 struct nfs4_fs_locations *locations = NULL;
2122 page = alloc_page(GFP_KERNEL);
2125 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2126 if (locations == NULL)
2129 status = nfs4_proc_fs_locations(dir, name, locations, page);
2132 /* Make sure server returned a different fsid for the referral */
2133 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2134 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2139 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2140 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2142 fattr->mode = S_IFDIR;
2143 memset(fhandle, 0, sizeof(struct nfs_fh));
2152 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2154 struct nfs4_getattr_arg args = {
2156 .bitmask = server->attr_bitmask,
2158 struct nfs4_getattr_res res = {
2162 struct rpc_message msg = {
2163 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2168 nfs_fattr_init(fattr);
2169 return nfs4_call_sync(server, &msg, &args, &res, 0);
2172 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2174 struct nfs4_exception exception = { };
2177 err = nfs4_handle_exception(server,
2178 _nfs4_proc_getattr(server, fhandle, fattr),
2180 } while (exception.retry);
2185 * The file is not closed if it is opened due to the a request to change
2186 * the size of the file. The open call will not be needed once the
2187 * VFS layer lookup-intents are implemented.
2189 * Close is called when the inode is destroyed.
2190 * If we haven't opened the file for O_WRONLY, we
2191 * need to in the size_change case to obtain a stateid.
2194 * Because OPEN is always done by name in nfsv4, it is
2195 * possible that we opened a different file by the same
2196 * name. We can recognize this race condition, but we
2197 * can't do anything about it besides returning an error.
2199 * This will be fixed with VFS changes (lookup-intent).
2202 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2203 struct iattr *sattr)
2205 struct inode *inode = dentry->d_inode;
2206 struct rpc_cred *cred = NULL;
2207 struct nfs4_state *state = NULL;
2210 nfs_fattr_init(fattr);
2212 /* Search for an existing open(O_WRITE) file */
2213 if (sattr->ia_valid & ATTR_FILE) {
2214 struct nfs_open_context *ctx;
2216 ctx = nfs_file_open_context(sattr->ia_file);
2223 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2225 nfs_setattr_update_inode(inode, sattr);
2229 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2230 const struct qstr *name, struct nfs_fh *fhandle,
2231 struct nfs_fattr *fattr)
2234 struct nfs4_lookup_arg args = {
2235 .bitmask = server->attr_bitmask,
2239 struct nfs4_lookup_res res = {
2244 struct rpc_message msg = {
2245 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2250 nfs_fattr_init(fattr);
2252 dprintk("NFS call lookupfh %s\n", name->name);
2253 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2254 dprintk("NFS reply lookupfh: %d\n", status);
2258 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2259 struct qstr *name, struct nfs_fh *fhandle,
2260 struct nfs_fattr *fattr)
2262 struct nfs4_exception exception = { };
2265 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2267 if (err == -NFS4ERR_MOVED) {
2271 err = nfs4_handle_exception(server, err, &exception);
2272 } while (exception.retry);
2276 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2277 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2281 dprintk("NFS call lookup %s\n", name->name);
2282 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2283 if (status == -NFS4ERR_MOVED)
2284 status = nfs4_get_referral(dir, name, fattr, fhandle);
2285 dprintk("NFS reply lookup: %d\n", status);
2289 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2291 struct nfs4_exception exception = { };
2294 err = nfs4_handle_exception(NFS_SERVER(dir),
2295 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2297 } while (exception.retry);
2301 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2303 struct nfs_server *server = NFS_SERVER(inode);
2304 struct nfs_fattr fattr;
2305 struct nfs4_accessargs args = {
2306 .fh = NFS_FH(inode),
2307 .bitmask = server->attr_bitmask,
2309 struct nfs4_accessres res = {
2313 struct rpc_message msg = {
2314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2317 .rpc_cred = entry->cred,
2319 int mode = entry->mask;
2323 * Determine which access bits we want to ask for...
2325 if (mode & MAY_READ)
2326 args.access |= NFS4_ACCESS_READ;
2327 if (S_ISDIR(inode->i_mode)) {
2328 if (mode & MAY_WRITE)
2329 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2330 if (mode & MAY_EXEC)
2331 args.access |= NFS4_ACCESS_LOOKUP;
2333 if (mode & MAY_WRITE)
2334 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2335 if (mode & MAY_EXEC)
2336 args.access |= NFS4_ACCESS_EXECUTE;
2338 nfs_fattr_init(&fattr);
2339 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2342 if (res.access & NFS4_ACCESS_READ)
2343 entry->mask |= MAY_READ;
2344 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2345 entry->mask |= MAY_WRITE;
2346 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2347 entry->mask |= MAY_EXEC;
2348 nfs_refresh_inode(inode, &fattr);
2353 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2355 struct nfs4_exception exception = { };
2358 err = nfs4_handle_exception(NFS_SERVER(inode),
2359 _nfs4_proc_access(inode, entry),
2361 } while (exception.retry);
2366 * TODO: For the time being, we don't try to get any attributes
2367 * along with any of the zero-copy operations READ, READDIR,
2370 * In the case of the first three, we want to put the GETATTR
2371 * after the read-type operation -- this is because it is hard
2372 * to predict the length of a GETATTR response in v4, and thus
2373 * align the READ data correctly. This means that the GETATTR
2374 * may end up partially falling into the page cache, and we should
2375 * shift it into the 'tail' of the xdr_buf before processing.
2376 * To do this efficiently, we need to know the total length
2377 * of data received, which doesn't seem to be available outside
2380 * In the case of WRITE, we also want to put the GETATTR after
2381 * the operation -- in this case because we want to make sure
2382 * we get the post-operation mtime and size. This means that
2383 * we can't use xdr_encode_pages() as written: we need a variant
2384 * of it which would leave room in the 'tail' iovec.
2386 * Both of these changes to the XDR layer would in fact be quite
2387 * minor, but I decided to leave them for a subsequent patch.
2389 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2390 unsigned int pgbase, unsigned int pglen)
2392 struct nfs4_readlink args = {
2393 .fh = NFS_FH(inode),
2398 struct nfs4_readlink_res res;
2399 struct rpc_message msg = {
2400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2405 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2408 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2409 unsigned int pgbase, unsigned int pglen)
2411 struct nfs4_exception exception = { };
2414 err = nfs4_handle_exception(NFS_SERVER(inode),
2415 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2417 } while (exception.retry);
2423 * We will need to arrange for the VFS layer to provide an atomic open.
2424 * Until then, this create/open method is prone to inefficiency and race
2425 * conditions due to the lookup, create, and open VFS calls from sys_open()
2426 * placed on the wire.
2428 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2429 * The file will be opened again in the subsequent VFS open call
2430 * (nfs4_proc_file_open).
2432 * The open for read will just hang around to be used by any process that
2433 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2437 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2438 int flags, struct nameidata *nd)
2440 struct path path = {
2441 .mnt = nd->path.mnt,
2444 struct nfs4_state *state;
2445 struct rpc_cred *cred;
2446 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2449 cred = rpc_lookup_cred();
2451 status = PTR_ERR(cred);
2454 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2456 if (IS_ERR(state)) {
2457 status = PTR_ERR(state);
2460 d_add(dentry, igrab(state->inode));
2461 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2462 if (flags & O_EXCL) {
2463 struct nfs_fattr fattr;
2464 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2466 nfs_setattr_update_inode(state->inode, sattr);
2467 nfs_post_op_update_inode(state->inode, &fattr);
2469 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2470 status = nfs4_intent_set_file(nd, &path, state, fmode);
2472 nfs4_close_sync(&path, state, fmode);
2479 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2481 struct nfs_server *server = NFS_SERVER(dir);
2482 struct nfs_removeargs args = {
2484 .name.len = name->len,
2485 .name.name = name->name,
2486 .bitmask = server->attr_bitmask,
2488 struct nfs_removeres res = {
2491 struct rpc_message msg = {
2492 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2498 nfs_fattr_init(&res.dir_attr);
2499 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2501 update_changeattr(dir, &res.cinfo);
2502 nfs_post_op_update_inode(dir, &res.dir_attr);
2507 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2509 struct nfs4_exception exception = { };
2512 err = nfs4_handle_exception(NFS_SERVER(dir),
2513 _nfs4_proc_remove(dir, name),
2515 } while (exception.retry);
2519 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2521 struct nfs_server *server = NFS_SERVER(dir);
2522 struct nfs_removeargs *args = msg->rpc_argp;
2523 struct nfs_removeres *res = msg->rpc_resp;
2525 args->bitmask = server->cache_consistency_bitmask;
2526 res->server = server;
2527 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2530 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2532 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2534 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
2535 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2537 update_changeattr(dir, &res->cinfo);
2538 nfs_post_op_update_inode(dir, &res->dir_attr);
2542 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2543 struct inode *new_dir, struct qstr *new_name)
2545 struct nfs_server *server = NFS_SERVER(old_dir);
2546 struct nfs4_rename_arg arg = {
2547 .old_dir = NFS_FH(old_dir),
2548 .new_dir = NFS_FH(new_dir),
2549 .old_name = old_name,
2550 .new_name = new_name,
2551 .bitmask = server->attr_bitmask,
2553 struct nfs_fattr old_fattr, new_fattr;
2554 struct nfs4_rename_res res = {
2556 .old_fattr = &old_fattr,
2557 .new_fattr = &new_fattr,
2559 struct rpc_message msg = {
2560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2566 nfs_fattr_init(res.old_fattr);
2567 nfs_fattr_init(res.new_fattr);
2568 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2571 update_changeattr(old_dir, &res.old_cinfo);
2572 nfs_post_op_update_inode(old_dir, res.old_fattr);
2573 update_changeattr(new_dir, &res.new_cinfo);
2574 nfs_post_op_update_inode(new_dir, res.new_fattr);
2579 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2580 struct inode *new_dir, struct qstr *new_name)
2582 struct nfs4_exception exception = { };
2585 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2586 _nfs4_proc_rename(old_dir, old_name,
2589 } while (exception.retry);
2593 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2595 struct nfs_server *server = NFS_SERVER(inode);
2596 struct nfs4_link_arg arg = {
2597 .fh = NFS_FH(inode),
2598 .dir_fh = NFS_FH(dir),
2600 .bitmask = server->attr_bitmask,
2602 struct nfs_fattr fattr, dir_attr;
2603 struct nfs4_link_res res = {
2606 .dir_attr = &dir_attr,
2608 struct rpc_message msg = {
2609 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2615 nfs_fattr_init(res.fattr);
2616 nfs_fattr_init(res.dir_attr);
2617 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2619 update_changeattr(dir, &res.cinfo);
2620 nfs_post_op_update_inode(dir, res.dir_attr);
2621 nfs_post_op_update_inode(inode, res.fattr);
2627 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2629 struct nfs4_exception exception = { };
2632 err = nfs4_handle_exception(NFS_SERVER(inode),
2633 _nfs4_proc_link(inode, dir, name),
2635 } while (exception.retry);
2639 struct nfs4_createdata {
2640 struct rpc_message msg;
2641 struct nfs4_create_arg arg;
2642 struct nfs4_create_res res;
2644 struct nfs_fattr fattr;
2645 struct nfs_fattr dir_fattr;
2648 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2649 struct qstr *name, struct iattr *sattr, u32 ftype)
2651 struct nfs4_createdata *data;
2653 data = kzalloc(sizeof(*data), GFP_KERNEL);
2655 struct nfs_server *server = NFS_SERVER(dir);
2657 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2658 data->msg.rpc_argp = &data->arg;
2659 data->msg.rpc_resp = &data->res;
2660 data->arg.dir_fh = NFS_FH(dir);
2661 data->arg.server = server;
2662 data->arg.name = name;
2663 data->arg.attrs = sattr;
2664 data->arg.ftype = ftype;
2665 data->arg.bitmask = server->attr_bitmask;
2666 data->res.server = server;
2667 data->res.fh = &data->fh;
2668 data->res.fattr = &data->fattr;
2669 data->res.dir_fattr = &data->dir_fattr;
2670 nfs_fattr_init(data->res.fattr);
2671 nfs_fattr_init(data->res.dir_fattr);
2676 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2678 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2679 &data->arg, &data->res, 1);
2681 update_changeattr(dir, &data->res.dir_cinfo);
2682 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2683 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2688 static void nfs4_free_createdata(struct nfs4_createdata *data)
2693 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2694 struct page *page, unsigned int len, struct iattr *sattr)
2696 struct nfs4_createdata *data;
2697 int status = -ENAMETOOLONG;
2699 if (len > NFS4_MAXPATHLEN)
2703 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2707 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2708 data->arg.u.symlink.pages = &page;
2709 data->arg.u.symlink.len = len;
2711 status = nfs4_do_create(dir, dentry, data);
2713 nfs4_free_createdata(data);
2718 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2719 struct page *page, unsigned int len, struct iattr *sattr)
2721 struct nfs4_exception exception = { };
2724 err = nfs4_handle_exception(NFS_SERVER(dir),
2725 _nfs4_proc_symlink(dir, dentry, page,
2728 } while (exception.retry);
2732 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2733 struct iattr *sattr)
2735 struct nfs4_createdata *data;
2736 int status = -ENOMEM;
2738 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2742 status = nfs4_do_create(dir, dentry, data);
2744 nfs4_free_createdata(data);
2749 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2750 struct iattr *sattr)
2752 struct nfs4_exception exception = { };
2755 err = nfs4_handle_exception(NFS_SERVER(dir),
2756 _nfs4_proc_mkdir(dir, dentry, sattr),
2758 } while (exception.retry);
2762 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2763 u64 cookie, struct page *page, unsigned int count, int plus)
2765 struct inode *dir = dentry->d_inode;
2766 struct nfs4_readdir_arg args = {
2771 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2773 struct nfs4_readdir_res res;
2774 struct rpc_message msg = {
2775 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2782 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2783 dentry->d_parent->d_name.name,
2784 dentry->d_name.name,
2785 (unsigned long long)cookie);
2786 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2787 res.pgbase = args.pgbase;
2788 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2790 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2792 nfs_invalidate_atime(dir);
2794 dprintk("%s: returns %d\n", __func__, status);
2798 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2799 u64 cookie, struct page *page, unsigned int count, int plus)
2801 struct nfs4_exception exception = { };
2804 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2805 _nfs4_proc_readdir(dentry, cred, cookie,
2808 } while (exception.retry);
2812 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2813 struct iattr *sattr, dev_t rdev)
2815 struct nfs4_createdata *data;
2816 int mode = sattr->ia_mode;
2817 int status = -ENOMEM;
2819 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2820 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2822 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2827 data->arg.ftype = NF4FIFO;
2828 else if (S_ISBLK(mode)) {
2829 data->arg.ftype = NF4BLK;
2830 data->arg.u.device.specdata1 = MAJOR(rdev);
2831 data->arg.u.device.specdata2 = MINOR(rdev);
2833 else if (S_ISCHR(mode)) {
2834 data->arg.ftype = NF4CHR;
2835 data->arg.u.device.specdata1 = MAJOR(rdev);
2836 data->arg.u.device.specdata2 = MINOR(rdev);
2839 status = nfs4_do_create(dir, dentry, data);
2841 nfs4_free_createdata(data);
2846 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2847 struct iattr *sattr, dev_t rdev)
2849 struct nfs4_exception exception = { };
2852 err = nfs4_handle_exception(NFS_SERVER(dir),
2853 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2855 } while (exception.retry);
2859 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2860 struct nfs_fsstat *fsstat)
2862 struct nfs4_statfs_arg args = {
2864 .bitmask = server->attr_bitmask,
2866 struct nfs4_statfs_res res = {
2869 struct rpc_message msg = {
2870 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2875 nfs_fattr_init(fsstat->fattr);
2876 return nfs4_call_sync(server, &msg, &args, &res, 0);
2879 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2881 struct nfs4_exception exception = { };
2884 err = nfs4_handle_exception(server,
2885 _nfs4_proc_statfs(server, fhandle, fsstat),
2887 } while (exception.retry);
2891 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2892 struct nfs_fsinfo *fsinfo)
2894 struct nfs4_fsinfo_arg args = {
2896 .bitmask = server->attr_bitmask,
2898 struct nfs4_fsinfo_res res = {
2901 struct rpc_message msg = {
2902 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2907 return nfs4_call_sync(server, &msg, &args, &res, 0);
2910 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2912 struct nfs4_exception exception = { };
2916 err = nfs4_handle_exception(server,
2917 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2919 } while (exception.retry);
2923 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2925 nfs_fattr_init(fsinfo->fattr);
2926 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2929 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2930 struct nfs_pathconf *pathconf)
2932 struct nfs4_pathconf_arg args = {
2934 .bitmask = server->attr_bitmask,
2936 struct nfs4_pathconf_res res = {
2937 .pathconf = pathconf,
2939 struct rpc_message msg = {
2940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2945 /* None of the pathconf attributes are mandatory to implement */
2946 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2947 memset(pathconf, 0, sizeof(*pathconf));
2951 nfs_fattr_init(pathconf->fattr);
2952 return nfs4_call_sync(server, &msg, &args, &res, 0);
2955 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2956 struct nfs_pathconf *pathconf)
2958 struct nfs4_exception exception = { };
2962 err = nfs4_handle_exception(server,
2963 _nfs4_proc_pathconf(server, fhandle, pathconf),
2965 } while (exception.retry);
2969 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2971 struct nfs_server *server = NFS_SERVER(data->inode);
2973 dprintk("--> %s\n", __func__);
2975 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2977 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
2978 nfs4_restart_rpc(task, server->nfs_client);
2982 nfs_invalidate_atime(data->inode);
2983 if (task->tk_status > 0)
2984 renew_lease(server, data->timestamp);
2988 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2990 data->timestamp = jiffies;
2991 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2994 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2996 struct inode *inode = data->inode;
2998 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3001 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3002 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3005 if (task->tk_status >= 0) {
3006 renew_lease(NFS_SERVER(inode), data->timestamp);
3007 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3012 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3014 struct nfs_server *server = NFS_SERVER(data->inode);
3016 data->args.bitmask = server->cache_consistency_bitmask;
3017 data->res.server = server;
3018 data->timestamp = jiffies;
3020 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3023 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3025 struct inode *inode = data->inode;
3027 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3029 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3030 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3033 nfs_refresh_inode(inode, data->res.fattr);
3037 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3039 struct nfs_server *server = NFS_SERVER(data->inode);
3041 data->args.bitmask = server->cache_consistency_bitmask;
3042 data->res.server = server;
3043 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3047 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3048 * standalone procedure for queueing an asynchronous RENEW.
3050 static void nfs4_renew_done(struct rpc_task *task, void *data)
3052 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
3053 unsigned long timestamp = (unsigned long)data;
3055 if (task->tk_status < 0) {
3056 /* Unless we're shutting down, schedule state recovery! */
3057 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3058 nfs4_schedule_state_recovery(clp);
3061 spin_lock(&clp->cl_lock);
3062 if (time_before(clp->cl_last_renewal,timestamp))
3063 clp->cl_last_renewal = timestamp;
3064 spin_unlock(&clp->cl_lock);
3067 static const struct rpc_call_ops nfs4_renew_ops = {
3068 .rpc_call_done = nfs4_renew_done,
3071 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3073 struct rpc_message msg = {
3074 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3079 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3080 &nfs4_renew_ops, (void *)jiffies);
3083 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3085 struct rpc_message msg = {
3086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3090 unsigned long now = jiffies;
3093 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3096 spin_lock(&clp->cl_lock);
3097 if (time_before(clp->cl_last_renewal,now))
3098 clp->cl_last_renewal = now;
3099 spin_unlock(&clp->cl_lock);
3103 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3105 return (server->caps & NFS_CAP_ACLS)
3106 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3107 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3110 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3111 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3114 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3116 static void buf_to_pages(const void *buf, size_t buflen,
3117 struct page **pages, unsigned int *pgbase)
3119 const void *p = buf;
3121 *pgbase = offset_in_page(buf);
3123 while (p < buf + buflen) {
3124 *(pages++) = virt_to_page(p);
3125 p += PAGE_CACHE_SIZE;
3129 struct nfs4_cached_acl {
3135 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3137 struct nfs_inode *nfsi = NFS_I(inode);
3139 spin_lock(&inode->i_lock);
3140 kfree(nfsi->nfs4_acl);
3141 nfsi->nfs4_acl = acl;
3142 spin_unlock(&inode->i_lock);
3145 static void nfs4_zap_acl_attr(struct inode *inode)
3147 nfs4_set_cached_acl(inode, NULL);
3150 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3152 struct nfs_inode *nfsi = NFS_I(inode);
3153 struct nfs4_cached_acl *acl;
3156 spin_lock(&inode->i_lock);
3157 acl = nfsi->nfs4_acl;
3160 if (buf == NULL) /* user is just asking for length */
3162 if (acl->cached == 0)
3164 ret = -ERANGE; /* see getxattr(2) man page */
3165 if (acl->len > buflen)
3167 memcpy(buf, acl->data, acl->len);
3171 spin_unlock(&inode->i_lock);
3175 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3177 struct nfs4_cached_acl *acl;
3179 if (buf && acl_len <= PAGE_SIZE) {
3180 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3184 memcpy(acl->data, buf, acl_len);
3186 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3193 nfs4_set_cached_acl(inode, acl);
3196 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3198 struct page *pages[NFS4ACL_MAXPAGES];
3199 struct nfs_getaclargs args = {
3200 .fh = NFS_FH(inode),
3204 struct nfs_getaclres res = {
3208 struct rpc_message msg = {
3209 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3213 struct page *localpage = NULL;
3216 if (buflen < PAGE_SIZE) {
3217 /* As long as we're doing a round trip to the server anyway,
3218 * let's be prepared for a page of acl data. */
3219 localpage = alloc_page(GFP_KERNEL);
3220 resp_buf = page_address(localpage);
3221 if (localpage == NULL)
3223 args.acl_pages[0] = localpage;
3224 args.acl_pgbase = 0;
3225 args.acl_len = PAGE_SIZE;
3228 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3230 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3233 if (res.acl_len > args.acl_len)
3234 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3236 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3239 if (res.acl_len > buflen)
3242 memcpy(buf, resp_buf, res.acl_len);
3247 __free_page(localpage);
3251 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3253 struct nfs4_exception exception = { };
3256 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3259 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3260 } while (exception.retry);
3264 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3266 struct nfs_server *server = NFS_SERVER(inode);
3269 if (!nfs4_server_supports_acls(server))
3271 ret = nfs_revalidate_inode(server, inode);
3274 ret = nfs4_read_cached_acl(inode, buf, buflen);
3277 return nfs4_get_acl_uncached(inode, buf, buflen);
3280 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3282 struct nfs_server *server = NFS_SERVER(inode);
3283 struct page *pages[NFS4ACL_MAXPAGES];
3284 struct nfs_setaclargs arg = {
3285 .fh = NFS_FH(inode),
3289 struct nfs_setaclres res;
3290 struct rpc_message msg = {
3291 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3297 if (!nfs4_server_supports_acls(server))
3299 nfs_inode_return_delegation(inode);
3300 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3301 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3302 nfs_access_zap_cache(inode);
3303 nfs_zap_acl_cache(inode);
3307 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3309 struct nfs4_exception exception = { };
3312 err = nfs4_handle_exception(NFS_SERVER(inode),
3313 __nfs4_proc_set_acl(inode, buf, buflen),
3315 } while (exception.retry);
3320 _nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
3322 if (!clp || task->tk_status >= 0)
3324 switch(task->tk_status) {
3325 case -NFS4ERR_ADMIN_REVOKED:
3326 case -NFS4ERR_BAD_STATEID:
3327 case -NFS4ERR_OPENMODE:
3330 nfs4_state_mark_reclaim_nograce(clp, state);
3331 case -NFS4ERR_STALE_CLIENTID:
3332 case -NFS4ERR_STALE_STATEID:
3333 case -NFS4ERR_EXPIRED:
3334 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3335 nfs4_schedule_state_recovery(clp);
3336 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3337 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3338 task->tk_status = 0;
3340 #if defined(CONFIG_NFS_V4_1)
3341 case -NFS4ERR_BADSESSION:
3342 case -NFS4ERR_BADSLOT:
3343 case -NFS4ERR_BAD_HIGH_SLOT:
3344 case -NFS4ERR_DEADSESSION:
3345 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3346 case -NFS4ERR_SEQ_FALSE_RETRY:
3347 case -NFS4ERR_SEQ_MISORDERED:
3348 dprintk("%s ERROR %d, Reset session\n", __func__,
3350 nfs4_schedule_state_recovery(clp);
3351 task->tk_status = 0;
3353 #endif /* CONFIG_NFS_V4_1 */
3354 case -NFS4ERR_DELAY:
3356 nfs_inc_server_stats(server, NFSIOS_DELAY);
3357 case -NFS4ERR_GRACE:
3358 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3359 task->tk_status = 0;
3361 case -NFS4ERR_OLD_STATEID:
3362 task->tk_status = 0;
3365 task->tk_status = nfs4_map_errors(task->tk_status);
3370 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3372 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3375 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
3377 nfs4_verifier sc_verifier;
3378 struct nfs4_setclientid setclientid = {
3379 .sc_verifier = &sc_verifier,
3382 struct rpc_message msg = {
3383 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3384 .rpc_argp = &setclientid,
3392 p = (__be32*)sc_verifier.data;
3393 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3394 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3397 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3398 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3400 rpc_peeraddr2str(clp->cl_rpcclient,
3402 rpc_peeraddr2str(clp->cl_rpcclient,
3404 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3405 clp->cl_id_uniquifier);
3406 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3407 sizeof(setclientid.sc_netid),
3408 rpc_peeraddr2str(clp->cl_rpcclient,
3409 RPC_DISPLAY_NETID));
3410 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3411 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3412 clp->cl_ipaddr, port >> 8, port & 255);
3414 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3415 if (status != -NFS4ERR_CLID_INUSE)
3420 ssleep(clp->cl_lease_time + 1);
3422 if (++clp->cl_id_uniquifier == 0)
3428 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3430 struct nfs_fsinfo fsinfo;
3431 struct rpc_message msg = {
3432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3434 .rpc_resp = &fsinfo,
3441 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3443 spin_lock(&clp->cl_lock);
3444 clp->cl_lease_time = fsinfo.lease_time * HZ;
3445 clp->cl_last_renewal = now;
3446 spin_unlock(&clp->cl_lock);
3451 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3456 err = _nfs4_proc_setclientid_confirm(clp, cred);
3460 case -NFS4ERR_RESOURCE:
3461 /* The IBM lawyers misread another document! */
3462 case -NFS4ERR_DELAY:
3463 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3469 struct nfs4_delegreturndata {
3470 struct nfs4_delegreturnargs args;
3471 struct nfs4_delegreturnres res;
3473 nfs4_stateid stateid;
3474 unsigned long timestamp;
3475 struct nfs_fattr fattr;
3479 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3481 struct nfs4_delegreturndata *data = calldata;
3483 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3486 data->rpc_status = task->tk_status;
3487 if (data->rpc_status == 0)
3488 renew_lease(data->res.server, data->timestamp);
3491 static void nfs4_delegreturn_release(void *calldata)
3496 #if defined(CONFIG_NFS_V4_1)
3497 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3499 struct nfs4_delegreturndata *d_data;
3501 d_data = (struct nfs4_delegreturndata *)data;
3503 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3504 &d_data->args.seq_args,
3505 &d_data->res.seq_res, 1, task))
3507 rpc_call_start(task);
3509 #endif /* CONFIG_NFS_V4_1 */
3511 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3512 #if defined(CONFIG_NFS_V4_1)
3513 .rpc_call_prepare = nfs4_delegreturn_prepare,
3514 #endif /* CONFIG_NFS_V4_1 */
3515 .rpc_call_done = nfs4_delegreturn_done,
3516 .rpc_release = nfs4_delegreturn_release,
3519 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3521 struct nfs4_delegreturndata *data;
3522 struct nfs_server *server = NFS_SERVER(inode);
3523 struct rpc_task *task;
3524 struct rpc_message msg = {
3525 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3528 struct rpc_task_setup task_setup_data = {
3529 .rpc_client = server->client,
3530 .rpc_message = &msg,
3531 .callback_ops = &nfs4_delegreturn_ops,
3532 .flags = RPC_TASK_ASYNC,
3536 data = kzalloc(sizeof(*data), GFP_KERNEL);
3539 data->args.fhandle = &data->fh;
3540 data->args.stateid = &data->stateid;
3541 data->args.bitmask = server->attr_bitmask;
3542 nfs_copy_fh(&data->fh, NFS_FH(inode));
3543 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3544 data->res.fattr = &data->fattr;
3545 data->res.server = server;
3546 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3547 nfs_fattr_init(data->res.fattr);
3548 data->timestamp = jiffies;
3549 data->rpc_status = 0;
3551 task_setup_data.callback_data = data;
3552 msg.rpc_argp = &data->args,
3553 msg.rpc_resp = &data->res,
3554 task = rpc_run_task(&task_setup_data);
3556 return PTR_ERR(task);
3559 status = nfs4_wait_for_completion_rpc_task(task);
3562 status = data->rpc_status;
3565 nfs_refresh_inode(inode, &data->fattr);
3571 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3573 struct nfs_server *server = NFS_SERVER(inode);
3574 struct nfs4_exception exception = { };
3577 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3579 case -NFS4ERR_STALE_STATEID:
3580 case -NFS4ERR_EXPIRED:
3584 err = nfs4_handle_exception(server, err, &exception);
3585 } while (exception.retry);
3589 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3590 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3593 * sleep, with exponential backoff, and retry the LOCK operation.
3595 static unsigned long
3596 nfs4_set_lock_task_retry(unsigned long timeout)
3598 schedule_timeout_killable(timeout);
3600 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3601 return NFS4_LOCK_MAXTIMEOUT;
3605 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3607 struct inode *inode = state->inode;
3608 struct nfs_server *server = NFS_SERVER(inode);
3609 struct nfs_client *clp = server->nfs_client;
3610 struct nfs_lockt_args arg = {
3611 .fh = NFS_FH(inode),
3614 struct nfs_lockt_res res = {
3617 struct rpc_message msg = {
3618 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3621 .rpc_cred = state->owner->so_cred,
3623 struct nfs4_lock_state *lsp;
3626 arg.lock_owner.clientid = clp->cl_clientid;
3627 status = nfs4_set_lock_state(state, request);
3630 lsp = request->fl_u.nfs4_fl.owner;
3631 arg.lock_owner.id = lsp->ls_id.id;
3632 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3635 request->fl_type = F_UNLCK;
3637 case -NFS4ERR_DENIED:
3640 request->fl_ops->fl_release_private(request);
3645 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3647 struct nfs4_exception exception = { };
3651 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3652 _nfs4_proc_getlk(state, cmd, request),
3654 } while (exception.retry);
3658 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3661 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3663 res = posix_lock_file_wait(file, fl);
3666 res = flock_lock_file_wait(file, fl);
3674 struct nfs4_unlockdata {
3675 struct nfs_locku_args arg;
3676 struct nfs_locku_res res;
3677 struct nfs4_lock_state *lsp;
3678 struct nfs_open_context *ctx;
3679 struct file_lock fl;
3680 const struct nfs_server *server;
3681 unsigned long timestamp;
3684 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3685 struct nfs_open_context *ctx,
3686 struct nfs4_lock_state *lsp,
3687 struct nfs_seqid *seqid)
3689 struct nfs4_unlockdata *p;
3690 struct inode *inode = lsp->ls_state->inode;
3692 p = kzalloc(sizeof(*p), GFP_KERNEL);
3695 p->arg.fh = NFS_FH(inode);
3697 p->arg.seqid = seqid;
3698 p->res.seqid = seqid;
3699 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3700 p->arg.stateid = &lsp->ls_stateid;
3702 atomic_inc(&lsp->ls_count);
3703 /* Ensure we don't close file until we're done freeing locks! */
3704 p->ctx = get_nfs_open_context(ctx);
3705 memcpy(&p->fl, fl, sizeof(p->fl));
3706 p->server = NFS_SERVER(inode);
3710 static void nfs4_locku_release_calldata(void *data)
3712 struct nfs4_unlockdata *calldata = data;
3713 nfs_free_seqid(calldata->arg.seqid);
3714 nfs4_put_lock_state(calldata->lsp);
3715 put_nfs_open_context(calldata->ctx);
3719 static void nfs4_locku_done(struct rpc_task *task, void *data)
3721 struct nfs4_unlockdata *calldata = data;
3723 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3725 if (RPC_ASSASSINATED(task))
3727 switch (task->tk_status) {
3729 memcpy(calldata->lsp->ls_stateid.data,
3730 calldata->res.stateid.data,
3731 sizeof(calldata->lsp->ls_stateid.data));
3732 renew_lease(calldata->server, calldata->timestamp);
3734 case -NFS4ERR_BAD_STATEID:
3735 case -NFS4ERR_OLD_STATEID:
3736 case -NFS4ERR_STALE_STATEID:
3737 case -NFS4ERR_EXPIRED:
3740 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3741 nfs4_restart_rpc(task,
3742 calldata->server->nfs_client);
3746 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3748 struct nfs4_unlockdata *calldata = data;
3750 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3752 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3753 /* Note: exit _without_ running nfs4_locku_done */
3754 task->tk_action = NULL;
3757 calldata->timestamp = jiffies;
3758 if (nfs4_setup_sequence(calldata->server->nfs_client,
3759 &calldata->arg.seq_args,
3760 &calldata->res.seq_res, 1, task))
3762 rpc_call_start(task);
3765 static const struct rpc_call_ops nfs4_locku_ops = {
3766 .rpc_call_prepare = nfs4_locku_prepare,
3767 .rpc_call_done = nfs4_locku_done,
3768 .rpc_release = nfs4_locku_release_calldata,
3771 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3772 struct nfs_open_context *ctx,
3773 struct nfs4_lock_state *lsp,
3774 struct nfs_seqid *seqid)
3776 struct nfs4_unlockdata *data;
3777 struct rpc_message msg = {
3778 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3779 .rpc_cred = ctx->cred,
3781 struct rpc_task_setup task_setup_data = {
3782 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3783 .rpc_message = &msg,
3784 .callback_ops = &nfs4_locku_ops,
3785 .workqueue = nfsiod_workqueue,
3786 .flags = RPC_TASK_ASYNC,
3789 /* Ensure this is an unlock - when canceling a lock, the
3790 * canceled lock is passed in, and it won't be an unlock.
3792 fl->fl_type = F_UNLCK;
3794 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3796 nfs_free_seqid(seqid);
3797 return ERR_PTR(-ENOMEM);
3800 msg.rpc_argp = &data->arg,
3801 msg.rpc_resp = &data->res,
3802 task_setup_data.callback_data = data;
3803 return rpc_run_task(&task_setup_data);
3806 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3808 struct nfs_inode *nfsi = NFS_I(state->inode);
3809 struct nfs_seqid *seqid;
3810 struct nfs4_lock_state *lsp;
3811 struct rpc_task *task;
3813 unsigned char fl_flags = request->fl_flags;
3815 status = nfs4_set_lock_state(state, request);
3816 /* Unlock _before_ we do the RPC call */
3817 request->fl_flags |= FL_EXISTS;
3818 down_read(&nfsi->rwsem);
3819 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3820 up_read(&nfsi->rwsem);
3823 up_read(&nfsi->rwsem);
3826 /* Is this a delegated lock? */
3827 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3829 lsp = request->fl_u.nfs4_fl.owner;
3830 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3834 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3835 status = PTR_ERR(task);
3838 status = nfs4_wait_for_completion_rpc_task(task);
3841 request->fl_flags = fl_flags;
3845 struct nfs4_lockdata {
3846 struct nfs_lock_args arg;
3847 struct nfs_lock_res res;
3848 struct nfs4_lock_state *lsp;
3849 struct nfs_open_context *ctx;
3850 struct file_lock fl;
3851 unsigned long timestamp;
3854 struct nfs_server *server;
3857 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3858 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3860 struct nfs4_lockdata *p;
3861 struct inode *inode = lsp->ls_state->inode;
3862 struct nfs_server *server = NFS_SERVER(inode);
3864 p = kzalloc(sizeof(*p), GFP_KERNEL);
3868 p->arg.fh = NFS_FH(inode);
3870 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3871 if (p->arg.open_seqid == NULL)
3873 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3874 if (p->arg.lock_seqid == NULL)
3875 goto out_free_seqid;
3876 p->arg.lock_stateid = &lsp->ls_stateid;
3877 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3878 p->arg.lock_owner.id = lsp->ls_id.id;
3879 p->res.lock_seqid = p->arg.lock_seqid;
3880 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3883 atomic_inc(&lsp->ls_count);
3884 p->ctx = get_nfs_open_context(ctx);
3885 memcpy(&p->fl, fl, sizeof(p->fl));
3888 nfs_free_seqid(p->arg.open_seqid);
3894 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3896 struct nfs4_lockdata *data = calldata;
3897 struct nfs4_state *state = data->lsp->ls_state;
3899 dprintk("%s: begin!\n", __func__);
3900 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3902 /* Do we need to do an open_to_lock_owner? */
3903 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3904 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3906 data->arg.open_stateid = &state->stateid;
3907 data->arg.new_lock_owner = 1;
3908 data->res.open_seqid = data->arg.open_seqid;
3910 data->arg.new_lock_owner = 0;
3911 data->timestamp = jiffies;
3912 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3913 &data->res.seq_res, 1, task))
3915 rpc_call_start(task);
3916 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3919 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3921 struct nfs4_lockdata *data = calldata;
3923 dprintk("%s: begin!\n", __func__);
3925 nfs4_sequence_done(data->server, &data->res.seq_res,
3928 data->rpc_status = task->tk_status;
3929 if (RPC_ASSASSINATED(task))
3931 if (data->arg.new_lock_owner != 0) {
3932 if (data->rpc_status == 0)
3933 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3937 if (data->rpc_status == 0) {
3938 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3939 sizeof(data->lsp->ls_stateid.data));
3940 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3941 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3944 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3947 static void nfs4_lock_release(void *calldata)
3949 struct nfs4_lockdata *data = calldata;
3951 dprintk("%s: begin!\n", __func__);
3952 nfs_free_seqid(data->arg.open_seqid);
3953 if (data->cancelled != 0) {
3954 struct rpc_task *task;
3955 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3956 data->arg.lock_seqid);
3959 dprintk("%s: cancelling lock!\n", __func__);
3961 nfs_free_seqid(data->arg.lock_seqid);
3962 nfs4_put_lock_state(data->lsp);
3963 put_nfs_open_context(data->ctx);
3965 dprintk("%s: done!\n", __func__);
3968 static const struct rpc_call_ops nfs4_lock_ops = {
3969 .rpc_call_prepare = nfs4_lock_prepare,
3970 .rpc_call_done = nfs4_lock_done,
3971 .rpc_release = nfs4_lock_release,
3974 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3976 struct nfs4_lockdata *data;
3977 struct rpc_task *task;
3978 struct rpc_message msg = {
3979 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3980 .rpc_cred = state->owner->so_cred,
3982 struct rpc_task_setup task_setup_data = {
3983 .rpc_client = NFS_CLIENT(state->inode),
3984 .rpc_message = &msg,
3985 .callback_ops = &nfs4_lock_ops,
3986 .workqueue = nfsiod_workqueue,
3987 .flags = RPC_TASK_ASYNC,
3991 dprintk("%s: begin!\n", __func__);
3992 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3993 fl->fl_u.nfs4_fl.owner);
3997 data->arg.block = 1;
3999 data->arg.reclaim = 1;
4000 msg.rpc_argp = &data->arg,
4001 msg.rpc_resp = &data->res,
4002 task_setup_data.callback_data = data;
4003 task = rpc_run_task(&task_setup_data);
4005 return PTR_ERR(task);
4006 ret = nfs4_wait_for_completion_rpc_task(task);
4008 ret = data->rpc_status;
4010 data->cancelled = 1;
4012 dprintk("%s: done, ret = %d!\n", __func__, ret);
4016 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4018 struct nfs_server *server = NFS_SERVER(state->inode);
4019 struct nfs4_exception exception = { };
4023 /* Cache the lock if possible... */
4024 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4026 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4027 if (err != -NFS4ERR_DELAY)
4029 nfs4_handle_exception(server, err, &exception);
4030 } while (exception.retry);
4034 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4036 struct nfs_server *server = NFS_SERVER(state->inode);
4037 struct nfs4_exception exception = { };
4040 err = nfs4_set_lock_state(state, request);
4044 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4046 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4050 case -NFS4ERR_GRACE:
4051 case -NFS4ERR_DELAY:
4052 nfs4_handle_exception(server, err, &exception);
4055 } while (exception.retry);
4060 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4062 struct nfs_inode *nfsi = NFS_I(state->inode);
4063 unsigned char fl_flags = request->fl_flags;
4066 /* Is this a delegated open? */
4067 status = nfs4_set_lock_state(state, request);
4070 request->fl_flags |= FL_ACCESS;
4071 status = do_vfs_lock(request->fl_file, request);
4074 down_read(&nfsi->rwsem);
4075 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4076 /* Yes: cache locks! */
4077 /* ...but avoid races with delegation recall... */
4078 request->fl_flags = fl_flags & ~FL_SLEEP;
4079 status = do_vfs_lock(request->fl_file, request);
4082 status = _nfs4_do_setlk(state, cmd, request, 0);
4085 /* Note: we always want to sleep here! */
4086 request->fl_flags = fl_flags | FL_SLEEP;
4087 if (do_vfs_lock(request->fl_file, request) < 0)
4088 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4090 up_read(&nfsi->rwsem);
4092 request->fl_flags = fl_flags;
4096 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4098 struct nfs4_exception exception = { };
4102 err = _nfs4_proc_setlk(state, cmd, request);
4103 if (err == -NFS4ERR_DENIED)
4105 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4107 } while (exception.retry);
4112 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4114 struct nfs_open_context *ctx;
4115 struct nfs4_state *state;
4116 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4119 /* verify open state */
4120 ctx = nfs_file_open_context(filp);
4123 if (request->fl_start < 0 || request->fl_end < 0)
4126 if (IS_GETLK(cmd)) {
4128 return nfs4_proc_getlk(state, F_GETLK, request);
4132 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4135 if (request->fl_type == F_UNLCK) {
4137 return nfs4_proc_unlck(state, cmd, request);
4144 status = nfs4_proc_setlk(state, cmd, request);
4145 if ((status != -EAGAIN) || IS_SETLK(cmd))
4147 timeout = nfs4_set_lock_task_retry(timeout);
4148 status = -ERESTARTSYS;
4151 } while(status < 0);
4155 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4157 struct nfs_server *server = NFS_SERVER(state->inode);
4158 struct nfs4_exception exception = { };
4161 err = nfs4_set_lock_state(state, fl);
4165 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
4168 printk(KERN_ERR "%s: unhandled error %d.\n",
4173 case -NFS4ERR_EXPIRED:
4174 case -NFS4ERR_STALE_CLIENTID:
4175 case -NFS4ERR_STALE_STATEID:
4176 nfs4_schedule_state_recovery(server->nfs_client);
4180 * The show must go on: exit, but mark the
4181 * stateid as needing recovery.
4183 case -NFS4ERR_ADMIN_REVOKED:
4184 case -NFS4ERR_BAD_STATEID:
4185 case -NFS4ERR_OPENMODE:
4186 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4190 case -NFS4ERR_DENIED:
4191 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4194 case -NFS4ERR_DELAY:
4197 err = nfs4_handle_exception(server, err, &exception);
4198 } while (exception.retry);
4203 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4205 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4206 size_t buflen, int flags)
4208 struct inode *inode = dentry->d_inode;
4210 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4213 return nfs4_proc_set_acl(inode, buf, buflen);
4216 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4217 * and that's what we'll do for e.g. user attributes that haven't been set.
4218 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4219 * attributes in kernel-managed attribute namespaces. */
4220 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4223 struct inode *inode = dentry->d_inode;
4225 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4228 return nfs4_proc_get_acl(inode, buf, buflen);
4231 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4233 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
4235 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4237 if (buf && buflen < len)
4240 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4244 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4246 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4247 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4248 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4251 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4252 NFS_ATTR_FATTR_NLINK;
4253 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4257 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4258 struct nfs4_fs_locations *fs_locations, struct page *page)
4260 struct nfs_server *server = NFS_SERVER(dir);
4262 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4263 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4265 struct nfs4_fs_locations_arg args = {
4266 .dir_fh = NFS_FH(dir),
4271 struct nfs4_fs_locations_res res = {
4272 .fs_locations = fs_locations,
4274 struct rpc_message msg = {
4275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4281 dprintk("%s: start\n", __func__);
4282 nfs_fattr_init(&fs_locations->fattr);
4283 fs_locations->server = server;
4284 fs_locations->nlocations = 0;
4285 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4286 nfs_fixup_referral_attributes(&fs_locations->fattr);
4287 dprintk("%s: returned status = %d\n", __func__, status);
4291 #ifdef CONFIG_NFS_V4_1
4293 * nfs4_proc_exchange_id()
4295 * Since the clientid has expired, all compounds using sessions
4296 * associated with the stale clientid will be returning
4297 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4298 * be in some phase of session reset.
4300 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4302 nfs4_verifier verifier;
4303 struct nfs41_exchange_id_args args = {
4305 .flags = clp->cl_exchange_flags,
4307 struct nfs41_exchange_id_res res = {
4311 struct rpc_message msg = {
4312 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4319 dprintk("--> %s\n", __func__);
4320 BUG_ON(clp == NULL);
4322 /* Remove server-only flags */
4323 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4325 p = (u32 *)verifier.data;
4326 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4327 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4328 args.verifier = &verifier;
4331 args.id_len = scnprintf(args.id, sizeof(args.id),
4334 rpc_peeraddr2str(clp->cl_rpcclient,
4336 clp->cl_id_uniquifier);
4338 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4340 if (status != NFS4ERR_CLID_INUSE)
4346 if (++clp->cl_id_uniquifier == 0)
4350 dprintk("<-- %s status= %d\n", __func__, status);
4354 struct nfs4_get_lease_time_data {
4355 struct nfs4_get_lease_time_args *args;
4356 struct nfs4_get_lease_time_res *res;
4357 struct nfs_client *clp;
4360 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4364 struct nfs4_get_lease_time_data *data =
4365 (struct nfs4_get_lease_time_data *)calldata;
4367 dprintk("--> %s\n", __func__);
4368 /* just setup sequence, do not trigger session recovery
4369 since we're invoked within one */
4370 ret = nfs41_setup_sequence(data->clp->cl_session,
4371 &data->args->la_seq_args,
4372 &data->res->lr_seq_res, 0, task);
4374 BUG_ON(ret == -EAGAIN);
4375 rpc_call_start(task);
4376 dprintk("<-- %s\n", __func__);
4380 * Called from nfs4_state_manager thread for session setup, so don't recover
4381 * from sequence operation or clientid errors.
4383 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4385 struct nfs4_get_lease_time_data *data =
4386 (struct nfs4_get_lease_time_data *)calldata;
4388 dprintk("--> %s\n", __func__);
4389 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4390 switch (task->tk_status) {
4391 case -NFS4ERR_DELAY:
4392 case -NFS4ERR_GRACE:
4393 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4394 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4395 task->tk_status = 0;
4396 nfs4_restart_rpc(task, data->clp);
4399 dprintk("<-- %s\n", __func__);
4402 struct rpc_call_ops nfs4_get_lease_time_ops = {
4403 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4404 .rpc_call_done = nfs4_get_lease_time_done,
4407 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4409 struct rpc_task *task;
4410 struct nfs4_get_lease_time_args args;
4411 struct nfs4_get_lease_time_res res = {
4412 .lr_fsinfo = fsinfo,
4414 struct nfs4_get_lease_time_data data = {
4419 struct rpc_message msg = {
4420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4424 struct rpc_task_setup task_setup = {
4425 .rpc_client = clp->cl_rpcclient,
4426 .rpc_message = &msg,
4427 .callback_ops = &nfs4_get_lease_time_ops,
4428 .callback_data = &data
4432 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4433 dprintk("--> %s\n", __func__);
4434 task = rpc_run_task(&task_setup);
4437 status = PTR_ERR(task);
4439 status = task->tk_status;
4442 dprintk("<-- %s return %d\n", __func__, status);
4448 * Reset a slot table
4450 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4451 int old_max_slots, int ivalue)
4456 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
4459 * Until we have dynamic slot table adjustment, insist
4460 * upon the same slot table size
4462 if (max_slots != old_max_slots) {
4463 dprintk("%s reset slot table does't match old\n",
4465 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4468 spin_lock(&tbl->slot_tbl_lock);
4469 for (i = 0; i < max_slots; ++i)
4470 tbl->slots[i].seq_nr = ivalue;
4471 spin_unlock(&tbl->slot_tbl_lock);
4472 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4473 tbl, tbl->slots, tbl->max_slots);
4475 dprintk("<-- %s: return %d\n", __func__, ret);
4480 * Reset the forechannel and backchannel slot tables
4482 static int nfs4_reset_slot_tables(struct nfs4_session *session)
4486 status = nfs4_reset_slot_table(&session->fc_slot_table,
4487 session->fc_attrs.max_reqs,
4488 session->fc_slot_table.max_slots,
4493 status = nfs4_reset_slot_table(&session->bc_slot_table,
4494 session->bc_attrs.max_reqs,
4495 session->bc_slot_table.max_slots,
4500 /* Destroy the slot table */
4501 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4503 if (session->fc_slot_table.slots != NULL) {
4504 kfree(session->fc_slot_table.slots);
4505 session->fc_slot_table.slots = NULL;
4507 if (session->bc_slot_table.slots != NULL) {
4508 kfree(session->bc_slot_table.slots);
4509 session->bc_slot_table.slots = NULL;
4515 * Initialize slot table
4517 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4518 int max_slots, int ivalue)
4520 struct nfs4_slot *slot;
4523 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4525 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4527 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4532 spin_lock(&tbl->slot_tbl_lock);
4533 tbl->max_slots = max_slots;
4535 tbl->highest_used_slotid = -1; /* no slot is currently used */
4536 spin_unlock(&tbl->slot_tbl_lock);
4537 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4538 tbl, tbl->slots, tbl->max_slots);
4540 dprintk("<-- %s: return %d\n", __func__, ret);
4545 * Initialize the forechannel and backchannel tables
4547 static int nfs4_init_slot_tables(struct nfs4_session *session)
4549 struct nfs4_slot_table *tbl;
4552 tbl = &session->fc_slot_table;
4553 if (tbl->slots == NULL) {
4554 status = nfs4_init_slot_table(tbl,
4555 session->fc_attrs.max_reqs, 1);
4560 tbl = &session->bc_slot_table;
4561 if (tbl->slots == NULL) {
4562 status = nfs4_init_slot_table(tbl,
4563 session->bc_attrs.max_reqs, 0);
4565 nfs4_destroy_slot_tables(session);
4571 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4573 struct nfs4_session *session;
4574 struct nfs4_slot_table *tbl;
4576 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4581 * The create session reply races with the server back
4582 * channel probe. Mark the client NFS_CS_SESSION_INITING
4583 * so that the client back channel can find the
4586 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4587 init_completion(&session->complete);
4589 tbl = &session->fc_slot_table;
4590 spin_lock_init(&tbl->slot_tbl_lock);
4591 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4593 tbl = &session->bc_slot_table;
4594 spin_lock_init(&tbl->slot_tbl_lock);
4595 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4601 void nfs4_destroy_session(struct nfs4_session *session)
4603 nfs4_proc_destroy_session(session);
4604 dprintk("%s Destroy backchannel for xprt %p\n",
4605 __func__, session->clp->cl_rpcclient->cl_xprt);
4606 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4607 NFS41_BC_MIN_CALLBACKS);
4608 nfs4_destroy_slot_tables(session);
4613 * Initialize the values to be used by the client in CREATE_SESSION
4614 * If nfs4_init_session set the fore channel request and response sizes,
4617 * Set the back channel max_resp_sz_cached to zero to force the client to
4618 * always set csa_cachethis to FALSE because the current implementation
4619 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4621 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4623 struct nfs4_session *session = args->client->cl_session;
4624 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4625 mxresp_sz = session->fc_attrs.max_resp_sz;
4628 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4630 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4631 /* Fore channel attributes */
4632 args->fc_attrs.headerpadsz = 0;
4633 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4634 args->fc_attrs.max_resp_sz = mxresp_sz;
4635 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4636 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4637 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4639 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4640 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4642 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4643 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4644 args->fc_attrs.max_reqs);
4646 /* Back channel attributes */
4647 args->bc_attrs.headerpadsz = 0;
4648 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4649 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4650 args->bc_attrs.max_resp_sz_cached = 0;
4651 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4652 args->bc_attrs.max_reqs = 1;
4654 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4655 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4657 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4658 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4659 args->bc_attrs.max_reqs);
4662 static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4666 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4667 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4671 #define _verify_fore_channel_attr(_name_) \
4672 _verify_channel_attr("fore", #_name_, \
4673 args->fc_attrs._name_, \
4674 session->fc_attrs._name_)
4676 #define _verify_back_channel_attr(_name_) \
4677 _verify_channel_attr("back", #_name_, \
4678 args->bc_attrs._name_, \
4679 session->bc_attrs._name_)
4682 * The server is not allowed to increase the fore channel header pad size,
4683 * maximum response size, or maximum number of operations.
4685 * The back channel attributes are only negotiatied down: We send what the
4686 * (back channel) server insists upon.
4688 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4689 struct nfs4_session *session)
4693 ret |= _verify_fore_channel_attr(headerpadsz);
4694 ret |= _verify_fore_channel_attr(max_resp_sz);
4695 ret |= _verify_fore_channel_attr(max_ops);
4697 ret |= _verify_back_channel_attr(headerpadsz);
4698 ret |= _verify_back_channel_attr(max_rqst_sz);
4699 ret |= _verify_back_channel_attr(max_resp_sz);
4700 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4701 ret |= _verify_back_channel_attr(max_ops);
4702 ret |= _verify_back_channel_attr(max_reqs);
4707 static int _nfs4_proc_create_session(struct nfs_client *clp)
4709 struct nfs4_session *session = clp->cl_session;
4710 struct nfs41_create_session_args args = {
4712 .cb_program = NFS4_CALLBACK,
4714 struct nfs41_create_session_res res = {
4717 struct rpc_message msg = {
4718 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4724 nfs4_init_channel_attrs(&args);
4725 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
4727 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4730 /* Verify the session's negotiated channel_attrs values */
4731 status = nfs4_verify_channel_attrs(&args, session);
4733 /* Increment the clientid slot sequence id */
4741 * Issues a CREATE_SESSION operation to the server.
4742 * It is the responsibility of the caller to verify the session is
4743 * expired before calling this routine.
4745 int nfs4_proc_create_session(struct nfs_client *clp)
4749 struct nfs_fsinfo fsinfo;
4750 struct nfs4_session *session = clp->cl_session;
4752 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4754 status = _nfs4_proc_create_session(clp);
4758 /* Init and reset the fore channel */
4759 status = nfs4_init_slot_tables(session);
4760 dprintk("slot table initialization returned %d\n", status);
4763 status = nfs4_reset_slot_tables(session);
4764 dprintk("slot table reset returned %d\n", status);
4768 ptr = (unsigned *)&session->sess_id.data[0];
4769 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4770 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4772 /* Get the lease time */
4773 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4775 /* Update lease time and schedule renewal */
4776 spin_lock(&clp->cl_lock);
4777 clp->cl_lease_time = fsinfo.lease_time * HZ;
4778 clp->cl_last_renewal = jiffies;
4779 spin_unlock(&clp->cl_lock);
4781 nfs4_schedule_state_renewal(clp);
4784 dprintk("<-- %s\n", __func__);
4789 * Issue the over-the-wire RPC DESTROY_SESSION.
4790 * The caller must serialize access to this routine.
4792 int nfs4_proc_destroy_session(struct nfs4_session *session)
4795 struct rpc_message msg;
4797 dprintk("--> nfs4_proc_destroy_session\n");
4799 /* session is still being setup */
4800 if (session->clp->cl_cons_state != NFS_CS_READY)
4803 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4804 msg.rpc_argp = session;
4805 msg.rpc_resp = NULL;
4806 msg.rpc_cred = NULL;
4807 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4811 "Got error %d from the server on DESTROY_SESSION. "
4812 "Session has been destroyed regardless...\n", status);
4814 dprintk("<-- nfs4_proc_destroy_session\n");
4818 int nfs4_init_session(struct nfs_server *server)
4820 struct nfs_client *clp = server->nfs_client;
4821 struct nfs4_session *session;
4824 if (!nfs4_has_session(clp))
4827 session = clp->cl_session;
4828 session->fc_attrs.max_rqst_sz = server->wsize + nfs41_maxwrite_overhead;
4829 session->fc_attrs.max_resp_sz = server->rsize + nfs41_maxread_overhead;
4831 ret = nfs4_recover_expired_lease(server);
4833 ret = nfs4_check_client_ready(clp);
4838 * Renew the cl_session lease.
4840 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4842 struct nfs4_sequence_args args;
4843 struct nfs4_sequence_res res;
4845 struct rpc_message msg = {
4846 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4852 args.sa_cache_this = 0;
4854 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4858 void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4860 struct nfs_client *clp = (struct nfs_client *)data;
4862 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4864 if (task->tk_status < 0) {
4865 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4867 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4869 nfs4_restart_rpc(task, clp);
4873 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4875 kfree(task->tk_msg.rpc_argp);
4876 kfree(task->tk_msg.rpc_resp);
4878 dprintk("<-- %s\n", __func__);
4881 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4883 struct nfs_client *clp;
4884 struct nfs4_sequence_args *args;
4885 struct nfs4_sequence_res *res;
4887 clp = (struct nfs_client *)data;
4888 args = task->tk_msg.rpc_argp;
4889 res = task->tk_msg.rpc_resp;
4891 if (nfs4_setup_sequence(clp, args, res, 0, task))
4893 rpc_call_start(task);
4896 static const struct rpc_call_ops nfs41_sequence_ops = {
4897 .rpc_call_done = nfs41_sequence_call_done,
4898 .rpc_call_prepare = nfs41_sequence_prepare,
4901 static int nfs41_proc_async_sequence(struct nfs_client *clp,
4902 struct rpc_cred *cred)
4904 struct nfs4_sequence_args *args;
4905 struct nfs4_sequence_res *res;
4906 struct rpc_message msg = {
4907 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4911 args = kzalloc(sizeof(*args), GFP_KERNEL);
4914 res = kzalloc(sizeof(*res), GFP_KERNEL);
4919 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4920 msg.rpc_argp = args;
4923 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4924 &nfs41_sequence_ops, (void *)clp);
4927 struct nfs4_reclaim_complete_data {
4928 struct nfs_client *clp;
4929 struct nfs41_reclaim_complete_args arg;
4930 struct nfs41_reclaim_complete_res res;
4933 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
4935 struct nfs4_reclaim_complete_data *calldata = data;
4937 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
4938 &calldata->res.seq_res, 0, task))
4941 rpc_call_start(task);
4944 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
4946 struct nfs4_reclaim_complete_data *calldata = data;
4947 struct nfs_client *clp = calldata->clp;
4948 struct nfs4_sequence_res *res = &calldata->res.seq_res;
4950 dprintk("--> %s\n", __func__);
4951 nfs41_sequence_done(clp, res, task->tk_status);
4952 switch (task->tk_status) {
4954 case -NFS4ERR_COMPLETE_ALREADY:
4956 case -NFS4ERR_BADSESSION:
4957 case -NFS4ERR_DEADSESSION:
4959 * Handle the session error, but do not retry the operation, as
4960 * we have no way of telling whether the clientid had to be
4961 * reset before we got our reply. If reset, a new wave of
4962 * reclaim operations will follow, containing their own reclaim
4963 * complete. We don't want our retry to get on the way of
4964 * recovery by incorrectly indicating to the server that we're
4965 * done reclaiming state since the process had to be restarted.
4967 _nfs4_async_handle_error(task, NULL, clp, NULL);
4970 if (_nfs4_async_handle_error(
4971 task, NULL, clp, NULL) == -EAGAIN) {
4972 rpc_restart_call_prepare(task);
4977 dprintk("<-- %s\n", __func__);
4980 static void nfs4_free_reclaim_complete_data(void *data)
4982 struct nfs4_reclaim_complete_data *calldata = data;
4987 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
4988 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
4989 .rpc_call_done = nfs4_reclaim_complete_done,
4990 .rpc_release = nfs4_free_reclaim_complete_data,
4994 * Issue a global reclaim complete.
4996 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
4998 struct nfs4_reclaim_complete_data *calldata;
4999 struct rpc_task *task;
5000 struct rpc_message msg = {
5001 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5003 struct rpc_task_setup task_setup_data = {
5004 .rpc_client = clp->cl_rpcclient,
5005 .rpc_message = &msg,
5006 .callback_ops = &nfs4_reclaim_complete_call_ops,
5007 .flags = RPC_TASK_ASYNC,
5009 int status = -ENOMEM;
5011 dprintk("--> %s\n", __func__);
5012 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
5013 if (calldata == NULL)
5015 calldata->clp = clp;
5016 calldata->arg.one_fs = 0;
5017 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5019 msg.rpc_argp = &calldata->arg;
5020 msg.rpc_resp = &calldata->res;
5021 task_setup_data.callback_data = calldata;
5022 task = rpc_run_task(&task_setup_data);
5024 status = PTR_ERR(task);
5027 dprintk("<-- %s status=%d\n", __func__, status);
5030 #endif /* CONFIG_NFS_V4_1 */
5032 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
5033 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5034 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5035 .recover_open = nfs4_open_reclaim,
5036 .recover_lock = nfs4_lock_reclaim,
5037 .establish_clid = nfs4_init_clientid,
5038 .get_clid_cred = nfs4_get_setclientid_cred,
5041 #if defined(CONFIG_NFS_V4_1)
5042 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5043 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5044 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5045 .recover_open = nfs4_open_reclaim,
5046 .recover_lock = nfs4_lock_reclaim,
5047 .establish_clid = nfs41_init_clientid,
5048 .get_clid_cred = nfs4_get_exchange_id_cred,
5049 .reclaim_complete = nfs41_proc_reclaim_complete,
5051 #endif /* CONFIG_NFS_V4_1 */
5053 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5054 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5055 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5056 .recover_open = nfs4_open_expired,
5057 .recover_lock = nfs4_lock_expired,
5058 .establish_clid = nfs4_init_clientid,
5059 .get_clid_cred = nfs4_get_setclientid_cred,
5062 #if defined(CONFIG_NFS_V4_1)
5063 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
5064 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5065 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5066 .recover_open = nfs4_open_expired,
5067 .recover_lock = nfs4_lock_expired,
5068 .establish_clid = nfs41_init_clientid,
5069 .get_clid_cred = nfs4_get_exchange_id_cred,
5071 #endif /* CONFIG_NFS_V4_1 */
5073 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5074 .sched_state_renewal = nfs4_proc_async_renew,
5075 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
5076 .renew_lease = nfs4_proc_renew,
5079 #if defined(CONFIG_NFS_V4_1)
5080 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5081 .sched_state_renewal = nfs41_proc_async_sequence,
5082 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
5083 .renew_lease = nfs4_proc_sequence,
5088 * Per minor version reboot and network partition recovery ops
5091 struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5092 &nfs40_reboot_recovery_ops,
5093 #if defined(CONFIG_NFS_V4_1)
5094 &nfs41_reboot_recovery_ops,
5098 struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5099 &nfs40_nograce_recovery_ops,
5100 #if defined(CONFIG_NFS_V4_1)
5101 &nfs41_nograce_recovery_ops,
5105 struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5106 &nfs40_state_renewal_ops,
5107 #if defined(CONFIG_NFS_V4_1)
5108 &nfs41_state_renewal_ops,
5112 static const struct inode_operations nfs4_file_inode_operations = {
5113 .permission = nfs_permission,
5114 .getattr = nfs_getattr,
5115 .setattr = nfs_setattr,
5116 .getxattr = nfs4_getxattr,
5117 .setxattr = nfs4_setxattr,
5118 .listxattr = nfs4_listxattr,
5121 const struct nfs_rpc_ops nfs_v4_clientops = {
5122 .version = 4, /* protocol version */
5123 .dentry_ops = &nfs4_dentry_operations,
5124 .dir_inode_ops = &nfs4_dir_inode_operations,
5125 .file_inode_ops = &nfs4_file_inode_operations,
5126 .getroot = nfs4_proc_get_root,
5127 .getattr = nfs4_proc_getattr,
5128 .setattr = nfs4_proc_setattr,
5129 .lookupfh = nfs4_proc_lookupfh,
5130 .lookup = nfs4_proc_lookup,
5131 .access = nfs4_proc_access,
5132 .readlink = nfs4_proc_readlink,
5133 .create = nfs4_proc_create,
5134 .remove = nfs4_proc_remove,
5135 .unlink_setup = nfs4_proc_unlink_setup,
5136 .unlink_done = nfs4_proc_unlink_done,
5137 .rename = nfs4_proc_rename,
5138 .link = nfs4_proc_link,
5139 .symlink = nfs4_proc_symlink,
5140 .mkdir = nfs4_proc_mkdir,
5141 .rmdir = nfs4_proc_remove,
5142 .readdir = nfs4_proc_readdir,
5143 .mknod = nfs4_proc_mknod,
5144 .statfs = nfs4_proc_statfs,
5145 .fsinfo = nfs4_proc_fsinfo,
5146 .pathconf = nfs4_proc_pathconf,
5147 .set_capabilities = nfs4_server_capabilities,
5148 .decode_dirent = nfs4_decode_dirent,
5149 .read_setup = nfs4_proc_read_setup,
5150 .read_done = nfs4_read_done,
5151 .write_setup = nfs4_proc_write_setup,
5152 .write_done = nfs4_write_done,
5153 .commit_setup = nfs4_proc_commit_setup,
5154 .commit_done = nfs4_commit_done,
5155 .lock = nfs4_proc_lock,
5156 .clear_acl_cache = nfs4_zap_acl_attr,
5157 .close_context = nfs4_close_context,