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/slab.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/namei.h>
49 #include <linux/mount.h>
50 #include <linux/module.h>
51 #include <linux/sunrpc/bc_xprt.h>
52 #include <linux/xattr.h>
55 #include "delegation.h"
61 #define NFSDBG_FACILITY NFSDBG_PROC
63 #define NFS4_POLL_RETRY_MIN (HZ/10)
64 #define NFS4_POLL_RETRY_MAX (15*HZ)
66 #define NFS4_MAX_LOOP_ON_RECOVER (10)
69 static int _nfs4_proc_open(struct nfs4_opendata *data);
70 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
71 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
72 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
73 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
74 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
75 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
76 struct nfs_fattr *fattr, struct iattr *sattr,
77 struct nfs4_state *state);
79 /* Prevent leaks of NFSv4 errors into userland */
80 static int nfs4_map_errors(int err)
85 case -NFS4ERR_RESOURCE:
88 dprintk("%s could not handle NFSv4 error %d\n",
96 * This is our standard bitmap for GETATTR requests.
98 const u32 nfs4_fattr_bitmap[2] = {
100 | FATTR4_WORD0_CHANGE
103 | FATTR4_WORD0_FILEID,
105 | FATTR4_WORD1_NUMLINKS
107 | FATTR4_WORD1_OWNER_GROUP
108 | FATTR4_WORD1_RAWDEV
109 | FATTR4_WORD1_SPACE_USED
110 | FATTR4_WORD1_TIME_ACCESS
111 | FATTR4_WORD1_TIME_METADATA
112 | FATTR4_WORD1_TIME_MODIFY
115 const u32 nfs4_statfs_bitmap[2] = {
116 FATTR4_WORD0_FILES_AVAIL
117 | FATTR4_WORD0_FILES_FREE
118 | FATTR4_WORD0_FILES_TOTAL,
119 FATTR4_WORD1_SPACE_AVAIL
120 | FATTR4_WORD1_SPACE_FREE
121 | FATTR4_WORD1_SPACE_TOTAL
124 const u32 nfs4_pathconf_bitmap[2] = {
126 | FATTR4_WORD0_MAXNAME,
130 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
131 | FATTR4_WORD0_MAXREAD
132 | FATTR4_WORD0_MAXWRITE
133 | FATTR4_WORD0_LEASE_TIME,
134 FATTR4_WORD1_TIME_DELTA
135 | FATTR4_WORD1_FS_LAYOUT_TYPES
138 const u32 nfs4_fs_locations_bitmap[2] = {
140 | FATTR4_WORD0_CHANGE
143 | FATTR4_WORD0_FILEID
144 | FATTR4_WORD0_FS_LOCATIONS,
146 | FATTR4_WORD1_NUMLINKS
148 | FATTR4_WORD1_OWNER_GROUP
149 | FATTR4_WORD1_RAWDEV
150 | FATTR4_WORD1_SPACE_USED
151 | FATTR4_WORD1_TIME_ACCESS
152 | FATTR4_WORD1_TIME_METADATA
153 | FATTR4_WORD1_TIME_MODIFY
154 | FATTR4_WORD1_MOUNTED_ON_FILEID
157 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
158 struct nfs4_readdir_arg *readdir)
162 BUG_ON(readdir->count < 80);
164 readdir->cookie = cookie;
165 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
170 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
175 * NFSv4 servers do not return entries for '.' and '..'
176 * Therefore, we fake these entries here. We let '.'
177 * have cookie 0 and '..' have cookie 1. Note that
178 * when talking to the server, we always send cookie 0
181 start = p = kmap_atomic(*readdir->pages, KM_USER0);
184 *p++ = xdr_one; /* next */
185 *p++ = xdr_zero; /* cookie, first word */
186 *p++ = xdr_one; /* cookie, second word */
187 *p++ = xdr_one; /* entry len */
188 memcpy(p, ".\0\0\0", 4); /* entry */
190 *p++ = xdr_one; /* bitmap length */
191 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
192 *p++ = htonl(8); /* attribute buffer length */
193 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
196 *p++ = xdr_one; /* next */
197 *p++ = xdr_zero; /* cookie, first word */
198 *p++ = xdr_two; /* cookie, second word */
199 *p++ = xdr_two; /* entry len */
200 memcpy(p, "..\0\0", 4); /* entry */
202 *p++ = xdr_one; /* bitmap length */
203 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
204 *p++ = htonl(8); /* attribute buffer length */
205 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
207 readdir->pgbase = (char *)p - (char *)start;
208 readdir->count -= readdir->pgbase;
209 kunmap_atomic(start, KM_USER0);
212 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
218 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
219 nfs_wait_bit_killable, TASK_KILLABLE);
223 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
230 *timeout = NFS4_POLL_RETRY_MIN;
231 if (*timeout > NFS4_POLL_RETRY_MAX)
232 *timeout = NFS4_POLL_RETRY_MAX;
233 schedule_timeout_killable(*timeout);
234 if (fatal_signal_pending(current))
240 /* This is the error handling routine for processes that are allowed
243 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
245 struct nfs_client *clp = server->nfs_client;
246 struct nfs4_state *state = exception->state;
249 exception->retry = 0;
253 case -NFS4ERR_ADMIN_REVOKED:
254 case -NFS4ERR_BAD_STATEID:
255 case -NFS4ERR_OPENMODE:
258 nfs4_state_mark_reclaim_nograce(clp, state);
259 goto do_state_recovery;
260 case -NFS4ERR_STALE_STATEID:
261 case -NFS4ERR_STALE_CLIENTID:
262 case -NFS4ERR_EXPIRED:
263 goto do_state_recovery;
264 #if defined(CONFIG_NFS_V4_1)
265 case -NFS4ERR_BADSESSION:
266 case -NFS4ERR_BADSLOT:
267 case -NFS4ERR_BAD_HIGH_SLOT:
268 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
269 case -NFS4ERR_DEADSESSION:
270 case -NFS4ERR_SEQ_FALSE_RETRY:
271 case -NFS4ERR_SEQ_MISORDERED:
272 dprintk("%s ERROR: %d Reset session\n", __func__,
274 nfs4_schedule_state_recovery(clp);
275 exception->retry = 1;
277 #endif /* defined(CONFIG_NFS_V4_1) */
278 case -NFS4ERR_FILE_OPEN:
279 if (exception->timeout > HZ) {
280 /* We have retried a decent amount, time to
289 ret = nfs4_delay(server->client, &exception->timeout);
292 case -NFS4ERR_OLD_STATEID:
293 exception->retry = 1;
295 /* We failed to handle the error */
296 return nfs4_map_errors(ret);
298 nfs4_schedule_state_recovery(clp);
299 ret = nfs4_wait_clnt_recover(clp);
301 exception->retry = 1;
306 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
308 spin_lock(&clp->cl_lock);
309 if (time_before(clp->cl_last_renewal,timestamp))
310 clp->cl_last_renewal = timestamp;
311 spin_unlock(&clp->cl_lock);
314 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
316 do_renew_lease(server->nfs_client, timestamp);
319 #if defined(CONFIG_NFS_V4_1)
322 * nfs4_free_slot - free a slot and efficiently update slot table.
324 * freeing a slot is trivially done by clearing its respective bit
326 * If the freed slotid equals highest_used_slotid we want to update it
327 * so that the server would be able to size down the slot table if needed,
328 * otherwise we know that the highest_used_slotid is still in use.
329 * When updating highest_used_slotid there may be "holes" in the bitmap
330 * so we need to scan down from highest_used_slotid to 0 looking for the now
331 * highest slotid in use.
332 * If none found, highest_used_slotid is set to -1.
334 * Must be called while holding tbl->slot_tbl_lock
337 nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
339 int free_slotid = free_slot - tbl->slots;
340 int slotid = free_slotid;
342 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
343 /* clear used bit in bitmap */
344 __clear_bit(slotid, tbl->used_slots);
346 /* update highest_used_slotid when it is freed */
347 if (slotid == tbl->highest_used_slotid) {
348 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
349 if (slotid < tbl->max_slots)
350 tbl->highest_used_slotid = slotid;
352 tbl->highest_used_slotid = -1;
354 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
355 free_slotid, tbl->highest_used_slotid);
359 * Signal state manager thread if session fore channel is drained
361 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
363 struct rpc_task *task;
365 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
366 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
368 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
372 if (ses->fc_slot_table.highest_used_slotid != -1)
375 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
376 complete(&ses->fc_slot_table.complete);
380 * Signal state manager thread if session back channel is drained
382 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
384 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
385 ses->bc_slot_table.highest_used_slotid != -1)
387 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
388 complete(&ses->bc_slot_table.complete);
391 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
393 struct nfs4_slot_table *tbl;
395 tbl = &res->sr_session->fc_slot_table;
397 /* just wake up the next guy waiting since
398 * we may have not consumed a slot after all */
399 dprintk("%s: No slot\n", __func__);
403 spin_lock(&tbl->slot_tbl_lock);
404 nfs4_free_slot(tbl, res->sr_slot);
405 nfs4_check_drain_fc_complete(res->sr_session);
406 spin_unlock(&tbl->slot_tbl_lock);
410 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
412 unsigned long timestamp;
413 struct nfs_client *clp;
416 * sr_status remains 1 if an RPC level error occurred. The server
417 * may or may not have processed the sequence operation..
418 * Proceed as if the server received and processed the sequence
421 if (res->sr_status == 1)
422 res->sr_status = NFS_OK;
424 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
428 /* Check the SEQUENCE operation status */
429 switch (res->sr_status) {
431 /* Update the slot's sequence and clientid lease timer */
432 ++res->sr_slot->seq_nr;
433 timestamp = res->sr_renewal_time;
434 clp = res->sr_session->clp;
435 do_renew_lease(clp, timestamp);
436 /* Check sequence flags */
437 if (atomic_read(&clp->cl_count) > 1)
438 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
441 /* The server detected a resend of the RPC call and
442 * returned NFS4ERR_DELAY as per Section 2.10.6.2
445 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
447 res->sr_slot - res->sr_session->fc_slot_table.slots,
448 res->sr_slot->seq_nr);
451 /* Just update the slot sequence no. */
452 ++res->sr_slot->seq_nr;
455 /* The session may be reset by one of the error handlers. */
456 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
457 nfs41_sequence_free_slot(res);
460 if (!rpc_restart_call(task))
462 rpc_delay(task, NFS4_POLL_RETRY_MAX);
466 static int nfs4_sequence_done(struct rpc_task *task,
467 struct nfs4_sequence_res *res)
469 if (res->sr_session == NULL)
471 return nfs41_sequence_done(task, res);
475 * nfs4_find_slot - efficiently look for a free slot
477 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
478 * If found, we mark the slot as used, update the highest_used_slotid,
479 * and respectively set up the sequence operation args.
480 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
482 * Note: must be called with under the slot_tbl_lock.
485 nfs4_find_slot(struct nfs4_slot_table *tbl)
488 u8 ret_id = NFS4_MAX_SLOT_TABLE;
489 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
491 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
492 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
494 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
495 if (slotid >= tbl->max_slots)
497 __set_bit(slotid, tbl->used_slots);
498 if (slotid > tbl->highest_used_slotid)
499 tbl->highest_used_slotid = slotid;
502 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
503 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
507 static int nfs41_setup_sequence(struct nfs4_session *session,
508 struct nfs4_sequence_args *args,
509 struct nfs4_sequence_res *res,
511 struct rpc_task *task)
513 struct nfs4_slot *slot;
514 struct nfs4_slot_table *tbl;
517 dprintk("--> %s\n", __func__);
518 /* slot already allocated? */
519 if (res->sr_slot != NULL)
522 tbl = &session->fc_slot_table;
524 spin_lock(&tbl->slot_tbl_lock);
525 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
526 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
528 * The state manager will wait until the slot table is empty.
529 * Schedule the reset thread
531 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
532 spin_unlock(&tbl->slot_tbl_lock);
533 dprintk("%s Schedule Session Reset\n", __func__);
537 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
538 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
539 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
540 spin_unlock(&tbl->slot_tbl_lock);
541 dprintk("%s enforce FIFO order\n", __func__);
545 slotid = nfs4_find_slot(tbl);
546 if (slotid == NFS4_MAX_SLOT_TABLE) {
547 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
548 spin_unlock(&tbl->slot_tbl_lock);
549 dprintk("<-- %s: no free slots\n", __func__);
552 spin_unlock(&tbl->slot_tbl_lock);
554 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
555 slot = tbl->slots + slotid;
556 args->sa_session = session;
557 args->sa_slotid = slotid;
558 args->sa_cache_this = cache_reply;
560 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
562 res->sr_session = session;
564 res->sr_renewal_time = jiffies;
565 res->sr_status_flags = 0;
567 * sr_status is only set in decode_sequence, and so will remain
568 * set to 1 if an rpc level failure occurs.
574 int nfs4_setup_sequence(const struct nfs_server *server,
575 struct nfs4_sequence_args *args,
576 struct nfs4_sequence_res *res,
578 struct rpc_task *task)
580 struct nfs4_session *session = nfs4_get_session(server);
583 if (session == NULL) {
584 args->sa_session = NULL;
585 res->sr_session = NULL;
589 dprintk("--> %s clp %p session %p sr_slot %td\n",
590 __func__, session->clp, session, res->sr_slot ?
591 res->sr_slot - session->fc_slot_table.slots : -1);
593 ret = nfs41_setup_sequence(session, args, res, cache_reply,
596 dprintk("<-- %s status=%d\n", __func__, ret);
600 struct nfs41_call_sync_data {
601 const struct nfs_server *seq_server;
602 struct nfs4_sequence_args *seq_args;
603 struct nfs4_sequence_res *seq_res;
607 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
609 struct nfs41_call_sync_data *data = calldata;
611 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
613 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
614 data->seq_res, data->cache_reply, task))
616 rpc_call_start(task);
619 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
621 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
622 nfs41_call_sync_prepare(task, calldata);
625 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
627 struct nfs41_call_sync_data *data = calldata;
629 nfs41_sequence_done(task, data->seq_res);
632 struct rpc_call_ops nfs41_call_sync_ops = {
633 .rpc_call_prepare = nfs41_call_sync_prepare,
634 .rpc_call_done = nfs41_call_sync_done,
637 struct rpc_call_ops nfs41_call_priv_sync_ops = {
638 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
639 .rpc_call_done = nfs41_call_sync_done,
642 static int nfs4_call_sync_sequence(struct nfs_server *server,
643 struct rpc_message *msg,
644 struct nfs4_sequence_args *args,
645 struct nfs4_sequence_res *res,
650 struct rpc_task *task;
651 struct nfs41_call_sync_data data = {
652 .seq_server = server,
655 .cache_reply = cache_reply,
657 struct rpc_task_setup task_setup = {
658 .rpc_client = server->client,
660 .callback_ops = &nfs41_call_sync_ops,
661 .callback_data = &data
666 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
667 task = rpc_run_task(&task_setup);
671 ret = task->tk_status;
677 int _nfs4_call_sync_session(struct nfs_server *server,
678 struct rpc_message *msg,
679 struct nfs4_sequence_args *args,
680 struct nfs4_sequence_res *res,
683 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
687 static int nfs4_sequence_done(struct rpc_task *task,
688 struct nfs4_sequence_res *res)
692 #endif /* CONFIG_NFS_V4_1 */
694 int _nfs4_call_sync(struct nfs_server *server,
695 struct rpc_message *msg,
696 struct nfs4_sequence_args *args,
697 struct nfs4_sequence_res *res,
700 args->sa_session = res->sr_session = NULL;
701 return rpc_call_sync(server->client, msg, 0);
704 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
705 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
706 &(res)->seq_res, (cache_reply))
708 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
710 struct nfs_inode *nfsi = NFS_I(dir);
712 spin_lock(&dir->i_lock);
713 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
714 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
715 nfs_force_lookup_revalidate(dir);
716 nfsi->change_attr = cinfo->after;
717 spin_unlock(&dir->i_lock);
720 struct nfs4_opendata {
722 struct nfs_openargs o_arg;
723 struct nfs_openres o_res;
724 struct nfs_open_confirmargs c_arg;
725 struct nfs_open_confirmres c_res;
726 struct nfs_fattr f_attr;
727 struct nfs_fattr dir_attr;
730 struct nfs4_state_owner *owner;
731 struct nfs4_state *state;
733 unsigned long timestamp;
734 unsigned int rpc_done : 1;
740 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
742 p->o_res.f_attr = &p->f_attr;
743 p->o_res.dir_attr = &p->dir_attr;
744 p->o_res.seqid = p->o_arg.seqid;
745 p->c_res.seqid = p->c_arg.seqid;
746 p->o_res.server = p->o_arg.server;
747 nfs_fattr_init(&p->f_attr);
748 nfs_fattr_init(&p->dir_attr);
751 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
752 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
753 const struct iattr *attrs,
756 struct dentry *parent = dget_parent(path->dentry);
757 struct inode *dir = parent->d_inode;
758 struct nfs_server *server = NFS_SERVER(dir);
759 struct nfs4_opendata *p;
761 p = kzalloc(sizeof(*p), gfp_mask);
764 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
765 if (p->o_arg.seqid == NULL)
771 atomic_inc(&sp->so_count);
772 p->o_arg.fh = NFS_FH(dir);
773 p->o_arg.open_flags = flags;
774 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
775 p->o_arg.clientid = server->nfs_client->cl_clientid;
776 p->o_arg.id = sp->so_owner_id.id;
777 p->o_arg.name = &p->path.dentry->d_name;
778 p->o_arg.server = server;
779 p->o_arg.bitmask = server->attr_bitmask;
780 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
781 if (flags & O_CREAT) {
784 p->o_arg.u.attrs = &p->attrs;
785 memcpy(&p->attrs, attrs, sizeof(p->attrs));
786 s = (u32 *) p->o_arg.u.verifier.data;
790 p->c_arg.fh = &p->o_res.fh;
791 p->c_arg.stateid = &p->o_res.stateid;
792 p->c_arg.seqid = p->o_arg.seqid;
793 nfs4_init_opendata_res(p);
803 static void nfs4_opendata_free(struct kref *kref)
805 struct nfs4_opendata *p = container_of(kref,
806 struct nfs4_opendata, kref);
808 nfs_free_seqid(p->o_arg.seqid);
809 if (p->state != NULL)
810 nfs4_put_open_state(p->state);
811 nfs4_put_state_owner(p->owner);
817 static void nfs4_opendata_put(struct nfs4_opendata *p)
820 kref_put(&p->kref, nfs4_opendata_free);
823 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
827 ret = rpc_wait_for_completion_task(task);
831 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
835 if (open_mode & O_EXCL)
837 switch (mode & (FMODE_READ|FMODE_WRITE)) {
839 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
840 && state->n_rdonly != 0;
843 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
844 && state->n_wronly != 0;
846 case FMODE_READ|FMODE_WRITE:
847 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
848 && state->n_rdwr != 0;
854 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
856 if ((delegation->type & fmode) != fmode)
858 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
860 nfs_mark_delegation_referenced(delegation);
864 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
873 case FMODE_READ|FMODE_WRITE:
876 nfs4_state_set_mode_locked(state, state->state | fmode);
879 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
881 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
882 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
883 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
886 set_bit(NFS_O_RDONLY_STATE, &state->flags);
889 set_bit(NFS_O_WRONLY_STATE, &state->flags);
891 case FMODE_READ|FMODE_WRITE:
892 set_bit(NFS_O_RDWR_STATE, &state->flags);
896 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
898 write_seqlock(&state->seqlock);
899 nfs_set_open_stateid_locked(state, stateid, fmode);
900 write_sequnlock(&state->seqlock);
903 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
906 * Protect the call to nfs4_state_set_mode_locked and
907 * serialise the stateid update
909 write_seqlock(&state->seqlock);
910 if (deleg_stateid != NULL) {
911 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
912 set_bit(NFS_DELEGATED_STATE, &state->flags);
914 if (open_stateid != NULL)
915 nfs_set_open_stateid_locked(state, open_stateid, fmode);
916 write_sequnlock(&state->seqlock);
917 spin_lock(&state->owner->so_lock);
918 update_open_stateflags(state, fmode);
919 spin_unlock(&state->owner->so_lock);
922 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
924 struct nfs_inode *nfsi = NFS_I(state->inode);
925 struct nfs_delegation *deleg_cur;
928 fmode &= (FMODE_READ|FMODE_WRITE);
931 deleg_cur = rcu_dereference(nfsi->delegation);
932 if (deleg_cur == NULL)
935 spin_lock(&deleg_cur->lock);
936 if (nfsi->delegation != deleg_cur ||
937 (deleg_cur->type & fmode) != fmode)
938 goto no_delegation_unlock;
940 if (delegation == NULL)
941 delegation = &deleg_cur->stateid;
942 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
943 goto no_delegation_unlock;
945 nfs_mark_delegation_referenced(deleg_cur);
946 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
948 no_delegation_unlock:
949 spin_unlock(&deleg_cur->lock);
953 if (!ret && open_stateid != NULL) {
954 __update_open_stateid(state, open_stateid, NULL, fmode);
962 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
964 struct nfs_delegation *delegation;
967 delegation = rcu_dereference(NFS_I(inode)->delegation);
968 if (delegation == NULL || (delegation->type & fmode) == fmode) {
973 nfs_inode_return_delegation(inode);
976 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
978 struct nfs4_state *state = opendata->state;
979 struct nfs_inode *nfsi = NFS_I(state->inode);
980 struct nfs_delegation *delegation;
981 int open_mode = opendata->o_arg.open_flags & O_EXCL;
982 fmode_t fmode = opendata->o_arg.fmode;
983 nfs4_stateid stateid;
987 if (can_open_cached(state, fmode, open_mode)) {
988 spin_lock(&state->owner->so_lock);
989 if (can_open_cached(state, fmode, open_mode)) {
990 update_open_stateflags(state, fmode);
991 spin_unlock(&state->owner->so_lock);
992 goto out_return_state;
994 spin_unlock(&state->owner->so_lock);
997 delegation = rcu_dereference(nfsi->delegation);
998 if (delegation == NULL ||
999 !can_open_delegated(delegation, fmode)) {
1003 /* Save the delegation */
1004 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1006 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1011 /* Try to update the stateid using the delegation */
1012 if (update_open_stateid(state, NULL, &stateid, fmode))
1013 goto out_return_state;
1016 return ERR_PTR(ret);
1018 atomic_inc(&state->count);
1022 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1024 struct inode *inode;
1025 struct nfs4_state *state = NULL;
1026 struct nfs_delegation *delegation;
1029 if (!data->rpc_done) {
1030 state = nfs4_try_open_cached(data);
1035 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1037 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1038 ret = PTR_ERR(inode);
1042 state = nfs4_get_open_state(inode, data->owner);
1045 if (data->o_res.delegation_type != 0) {
1046 int delegation_flags = 0;
1049 delegation = rcu_dereference(NFS_I(inode)->delegation);
1051 delegation_flags = delegation->flags;
1053 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1054 nfs_inode_set_delegation(state->inode,
1055 data->owner->so_cred,
1058 nfs_inode_reclaim_delegation(state->inode,
1059 data->owner->so_cred,
1063 update_open_stateid(state, &data->o_res.stateid, NULL,
1071 return ERR_PTR(ret);
1074 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1076 struct nfs_inode *nfsi = NFS_I(state->inode);
1077 struct nfs_open_context *ctx;
1079 spin_lock(&state->inode->i_lock);
1080 list_for_each_entry(ctx, &nfsi->open_files, list) {
1081 if (ctx->state != state)
1083 get_nfs_open_context(ctx);
1084 spin_unlock(&state->inode->i_lock);
1087 spin_unlock(&state->inode->i_lock);
1088 return ERR_PTR(-ENOENT);
1091 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1093 struct nfs4_opendata *opendata;
1095 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
1096 if (opendata == NULL)
1097 return ERR_PTR(-ENOMEM);
1098 opendata->state = state;
1099 atomic_inc(&state->count);
1103 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1105 struct nfs4_state *newstate;
1108 opendata->o_arg.open_flags = 0;
1109 opendata->o_arg.fmode = fmode;
1110 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1111 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1112 nfs4_init_opendata_res(opendata);
1113 ret = _nfs4_recover_proc_open(opendata);
1116 newstate = nfs4_opendata_to_nfs4_state(opendata);
1117 if (IS_ERR(newstate))
1118 return PTR_ERR(newstate);
1119 nfs4_close_state(&opendata->path, newstate, fmode);
1124 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1126 struct nfs4_state *newstate;
1129 /* memory barrier prior to reading state->n_* */
1130 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1132 if (state->n_rdwr != 0) {
1133 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1134 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1137 if (newstate != state)
1140 if (state->n_wronly != 0) {
1141 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1142 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1145 if (newstate != state)
1148 if (state->n_rdonly != 0) {
1149 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1150 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1153 if (newstate != state)
1157 * We may have performed cached opens for all three recoveries.
1158 * Check if we need to update the current stateid.
1160 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1161 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1162 write_seqlock(&state->seqlock);
1163 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1164 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1165 write_sequnlock(&state->seqlock);
1172 * reclaim state on the server after a reboot.
1174 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1176 struct nfs_delegation *delegation;
1177 struct nfs4_opendata *opendata;
1178 fmode_t delegation_type = 0;
1181 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1182 if (IS_ERR(opendata))
1183 return PTR_ERR(opendata);
1184 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1185 opendata->o_arg.fh = NFS_FH(state->inode);
1187 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1188 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1189 delegation_type = delegation->type;
1191 opendata->o_arg.u.delegation_type = delegation_type;
1192 status = nfs4_open_recover(opendata, state);
1193 nfs4_opendata_put(opendata);
1197 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1199 struct nfs_server *server = NFS_SERVER(state->inode);
1200 struct nfs4_exception exception = { };
1203 err = _nfs4_do_open_reclaim(ctx, state);
1204 if (err != -NFS4ERR_DELAY)
1206 nfs4_handle_exception(server, err, &exception);
1207 } while (exception.retry);
1211 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1213 struct nfs_open_context *ctx;
1216 ctx = nfs4_state_find_open_context(state);
1218 return PTR_ERR(ctx);
1219 ret = nfs4_do_open_reclaim(ctx, state);
1220 put_nfs_open_context(ctx);
1224 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1226 struct nfs4_opendata *opendata;
1229 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1230 if (IS_ERR(opendata))
1231 return PTR_ERR(opendata);
1232 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1233 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1234 sizeof(opendata->o_arg.u.delegation.data));
1235 ret = nfs4_open_recover(opendata, state);
1236 nfs4_opendata_put(opendata);
1240 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1242 struct nfs4_exception exception = { };
1243 struct nfs_server *server = NFS_SERVER(state->inode);
1246 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1252 case -NFS4ERR_BADSESSION:
1253 case -NFS4ERR_BADSLOT:
1254 case -NFS4ERR_BAD_HIGH_SLOT:
1255 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1256 case -NFS4ERR_DEADSESSION:
1257 nfs4_schedule_state_recovery(
1258 server->nfs_client);
1260 case -NFS4ERR_STALE_CLIENTID:
1261 case -NFS4ERR_STALE_STATEID:
1262 case -NFS4ERR_EXPIRED:
1263 /* Don't recall a delegation if it was lost */
1264 nfs4_schedule_state_recovery(server->nfs_client);
1268 * The show must go on: exit, but mark the
1269 * stateid as needing recovery.
1271 case -NFS4ERR_ADMIN_REVOKED:
1272 case -NFS4ERR_BAD_STATEID:
1273 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1276 * User RPCSEC_GSS context has expired.
1277 * We cannot recover this stateid now, so
1278 * skip it and allow recovery thread to
1285 err = nfs4_handle_exception(server, err, &exception);
1286 } while (exception.retry);
1291 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1293 struct nfs4_opendata *data = calldata;
1295 data->rpc_status = task->tk_status;
1296 if (data->rpc_status == 0) {
1297 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1298 sizeof(data->o_res.stateid.data));
1299 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1300 renew_lease(data->o_res.server, data->timestamp);
1305 static void nfs4_open_confirm_release(void *calldata)
1307 struct nfs4_opendata *data = calldata;
1308 struct nfs4_state *state = NULL;
1310 /* If this request hasn't been cancelled, do nothing */
1311 if (data->cancelled == 0)
1313 /* In case of error, no cleanup! */
1314 if (!data->rpc_done)
1316 state = nfs4_opendata_to_nfs4_state(data);
1318 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1320 nfs4_opendata_put(data);
1323 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1324 .rpc_call_done = nfs4_open_confirm_done,
1325 .rpc_release = nfs4_open_confirm_release,
1329 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1331 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1333 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1334 struct rpc_task *task;
1335 struct rpc_message msg = {
1336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1337 .rpc_argp = &data->c_arg,
1338 .rpc_resp = &data->c_res,
1339 .rpc_cred = data->owner->so_cred,
1341 struct rpc_task_setup task_setup_data = {
1342 .rpc_client = server->client,
1343 .rpc_message = &msg,
1344 .callback_ops = &nfs4_open_confirm_ops,
1345 .callback_data = data,
1346 .workqueue = nfsiod_workqueue,
1347 .flags = RPC_TASK_ASYNC,
1351 kref_get(&data->kref);
1353 data->rpc_status = 0;
1354 data->timestamp = jiffies;
1355 task = rpc_run_task(&task_setup_data);
1357 return PTR_ERR(task);
1358 status = nfs4_wait_for_completion_rpc_task(task);
1360 data->cancelled = 1;
1363 status = data->rpc_status;
1368 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1370 struct nfs4_opendata *data = calldata;
1371 struct nfs4_state_owner *sp = data->owner;
1373 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1376 * Check if we still need to send an OPEN call, or if we can use
1377 * a delegation instead.
1379 if (data->state != NULL) {
1380 struct nfs_delegation *delegation;
1382 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1385 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1386 if (delegation != NULL &&
1387 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1393 /* Update sequence id. */
1394 data->o_arg.id = sp->so_owner_id.id;
1395 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1396 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1397 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1398 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1400 data->timestamp = jiffies;
1401 if (nfs4_setup_sequence(data->o_arg.server,
1402 &data->o_arg.seq_args,
1403 &data->o_res.seq_res, 1, task))
1405 rpc_call_start(task);
1408 task->tk_action = NULL;
1412 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1414 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1415 nfs4_open_prepare(task, calldata);
1418 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1420 struct nfs4_opendata *data = calldata;
1422 data->rpc_status = task->tk_status;
1424 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1427 if (task->tk_status == 0) {
1428 switch (data->o_res.f_attr->mode & S_IFMT) {
1432 data->rpc_status = -ELOOP;
1435 data->rpc_status = -EISDIR;
1438 data->rpc_status = -ENOTDIR;
1440 renew_lease(data->o_res.server, data->timestamp);
1441 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1442 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1447 static void nfs4_open_release(void *calldata)
1449 struct nfs4_opendata *data = calldata;
1450 struct nfs4_state *state = NULL;
1452 /* If this request hasn't been cancelled, do nothing */
1453 if (data->cancelled == 0)
1455 /* In case of error, no cleanup! */
1456 if (data->rpc_status != 0 || !data->rpc_done)
1458 /* In case we need an open_confirm, no cleanup! */
1459 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1461 state = nfs4_opendata_to_nfs4_state(data);
1463 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1465 nfs4_opendata_put(data);
1468 static const struct rpc_call_ops nfs4_open_ops = {
1469 .rpc_call_prepare = nfs4_open_prepare,
1470 .rpc_call_done = nfs4_open_done,
1471 .rpc_release = nfs4_open_release,
1474 static const struct rpc_call_ops nfs4_recover_open_ops = {
1475 .rpc_call_prepare = nfs4_recover_open_prepare,
1476 .rpc_call_done = nfs4_open_done,
1477 .rpc_release = nfs4_open_release,
1480 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1482 struct inode *dir = data->dir->d_inode;
1483 struct nfs_server *server = NFS_SERVER(dir);
1484 struct nfs_openargs *o_arg = &data->o_arg;
1485 struct nfs_openres *o_res = &data->o_res;
1486 struct rpc_task *task;
1487 struct rpc_message msg = {
1488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1491 .rpc_cred = data->owner->so_cred,
1493 struct rpc_task_setup task_setup_data = {
1494 .rpc_client = server->client,
1495 .rpc_message = &msg,
1496 .callback_ops = &nfs4_open_ops,
1497 .callback_data = data,
1498 .workqueue = nfsiod_workqueue,
1499 .flags = RPC_TASK_ASYNC,
1503 kref_get(&data->kref);
1505 data->rpc_status = 0;
1506 data->cancelled = 0;
1508 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1509 task = rpc_run_task(&task_setup_data);
1511 return PTR_ERR(task);
1512 status = nfs4_wait_for_completion_rpc_task(task);
1514 data->cancelled = 1;
1517 status = data->rpc_status;
1523 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1525 struct inode *dir = data->dir->d_inode;
1526 struct nfs_openres *o_res = &data->o_res;
1529 status = nfs4_run_open_task(data, 1);
1530 if (status != 0 || !data->rpc_done)
1533 nfs_refresh_inode(dir, o_res->dir_attr);
1535 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1536 status = _nfs4_proc_open_confirm(data);
1545 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1547 static int _nfs4_proc_open(struct nfs4_opendata *data)
1549 struct inode *dir = data->dir->d_inode;
1550 struct nfs_server *server = NFS_SERVER(dir);
1551 struct nfs_openargs *o_arg = &data->o_arg;
1552 struct nfs_openres *o_res = &data->o_res;
1555 status = nfs4_run_open_task(data, 0);
1556 if (status != 0 || !data->rpc_done)
1559 if (o_arg->open_flags & O_CREAT) {
1560 update_changeattr(dir, &o_res->cinfo);
1561 nfs_post_op_update_inode(dir, o_res->dir_attr);
1563 nfs_refresh_inode(dir, o_res->dir_attr);
1564 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1565 server->caps &= ~NFS_CAP_POSIX_LOCK;
1566 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1567 status = _nfs4_proc_open_confirm(data);
1571 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1572 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1576 static int nfs4_recover_expired_lease(struct nfs_server *server)
1578 struct nfs_client *clp = server->nfs_client;
1582 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1583 ret = nfs4_wait_clnt_recover(clp);
1586 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1587 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1589 nfs4_schedule_state_recovery(clp);
1597 * reclaim state on the server after a network partition.
1598 * Assumes caller holds the appropriate lock
1600 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1602 struct nfs4_opendata *opendata;
1605 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1606 if (IS_ERR(opendata))
1607 return PTR_ERR(opendata);
1608 ret = nfs4_open_recover(opendata, state);
1610 d_drop(ctx->path.dentry);
1611 nfs4_opendata_put(opendata);
1615 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1617 struct nfs_server *server = NFS_SERVER(state->inode);
1618 struct nfs4_exception exception = { };
1622 err = _nfs4_open_expired(ctx, state);
1626 case -NFS4ERR_GRACE:
1627 case -NFS4ERR_DELAY:
1628 nfs4_handle_exception(server, err, &exception);
1631 } while (exception.retry);
1636 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1638 struct nfs_open_context *ctx;
1641 ctx = nfs4_state_find_open_context(state);
1643 return PTR_ERR(ctx);
1644 ret = nfs4_do_open_expired(ctx, state);
1645 put_nfs_open_context(ctx);
1650 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1651 * fields corresponding to attributes that were used to store the verifier.
1652 * Make sure we clobber those fields in the later setattr call
1654 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1656 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1657 !(sattr->ia_valid & ATTR_ATIME_SET))
1658 sattr->ia_valid |= ATTR_ATIME;
1660 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1661 !(sattr->ia_valid & ATTR_MTIME_SET))
1662 sattr->ia_valid |= ATTR_MTIME;
1666 * Returns a referenced nfs4_state
1668 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)
1670 struct nfs4_state_owner *sp;
1671 struct nfs4_state *state = NULL;
1672 struct nfs_server *server = NFS_SERVER(dir);
1673 struct nfs4_opendata *opendata;
1676 /* Protect against reboot recovery conflicts */
1678 if (!(sp = nfs4_get_state_owner(server, cred))) {
1679 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1682 status = nfs4_recover_expired_lease(server);
1684 goto err_put_state_owner;
1685 if (path->dentry->d_inode != NULL)
1686 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1688 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
1689 if (opendata == NULL)
1690 goto err_put_state_owner;
1692 if (path->dentry->d_inode != NULL)
1693 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1695 status = _nfs4_proc_open(opendata);
1697 goto err_opendata_put;
1699 state = nfs4_opendata_to_nfs4_state(opendata);
1700 status = PTR_ERR(state);
1702 goto err_opendata_put;
1703 if (server->caps & NFS_CAP_POSIX_LOCK)
1704 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1706 if (opendata->o_arg.open_flags & O_EXCL) {
1707 nfs4_exclusive_attrset(opendata, sattr);
1709 nfs_fattr_init(opendata->o_res.f_attr);
1710 status = nfs4_do_setattr(state->inode, cred,
1711 opendata->o_res.f_attr, sattr,
1714 nfs_setattr_update_inode(state->inode, sattr);
1715 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1717 nfs4_opendata_put(opendata);
1718 nfs4_put_state_owner(sp);
1722 nfs4_opendata_put(opendata);
1723 err_put_state_owner:
1724 nfs4_put_state_owner(sp);
1731 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)
1733 struct nfs4_exception exception = { };
1734 struct nfs4_state *res;
1738 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1741 /* NOTE: BAD_SEQID means the server and client disagree about the
1742 * book-keeping w.r.t. state-changing operations
1743 * (OPEN/CLOSE/LOCK/LOCKU...)
1744 * It is actually a sign of a bug on the client or on the server.
1746 * If we receive a BAD_SEQID error in the particular case of
1747 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1748 * have unhashed the old state_owner for us, and that we can
1749 * therefore safely retry using a new one. We should still warn
1750 * the user though...
1752 if (status == -NFS4ERR_BAD_SEQID) {
1753 printk(KERN_WARNING "NFS: v4 server %s "
1754 " returned a bad sequence-id error!\n",
1755 NFS_SERVER(dir)->nfs_client->cl_hostname);
1756 exception.retry = 1;
1760 * BAD_STATEID on OPEN means that the server cancelled our
1761 * state before it received the OPEN_CONFIRM.
1762 * Recover by retrying the request as per the discussion
1763 * on Page 181 of RFC3530.
1765 if (status == -NFS4ERR_BAD_STATEID) {
1766 exception.retry = 1;
1769 if (status == -EAGAIN) {
1770 /* We must have found a delegation */
1771 exception.retry = 1;
1774 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1775 status, &exception));
1776 } while (exception.retry);
1780 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1781 struct nfs_fattr *fattr, struct iattr *sattr,
1782 struct nfs4_state *state)
1784 struct nfs_server *server = NFS_SERVER(inode);
1785 struct nfs_setattrargs arg = {
1786 .fh = NFS_FH(inode),
1789 .bitmask = server->attr_bitmask,
1791 struct nfs_setattrres res = {
1795 struct rpc_message msg = {
1796 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1801 unsigned long timestamp = jiffies;
1804 nfs_fattr_init(fattr);
1806 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1807 /* Use that stateid */
1808 } else if (state != NULL) {
1809 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1811 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1813 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1814 if (status == 0 && state != NULL)
1815 renew_lease(server, timestamp);
1819 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1820 struct nfs_fattr *fattr, struct iattr *sattr,
1821 struct nfs4_state *state)
1823 struct nfs_server *server = NFS_SERVER(inode);
1824 struct nfs4_exception exception = { };
1827 err = nfs4_handle_exception(server,
1828 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1830 } while (exception.retry);
1834 struct nfs4_closedata {
1836 struct inode *inode;
1837 struct nfs4_state *state;
1838 struct nfs_closeargs arg;
1839 struct nfs_closeres res;
1840 struct nfs_fattr fattr;
1841 unsigned long timestamp;
1844 static void nfs4_free_closedata(void *data)
1846 struct nfs4_closedata *calldata = data;
1847 struct nfs4_state_owner *sp = calldata->state->owner;
1849 nfs4_put_open_state(calldata->state);
1850 nfs_free_seqid(calldata->arg.seqid);
1851 nfs4_put_state_owner(sp);
1852 path_put(&calldata->path);
1856 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1859 spin_lock(&state->owner->so_lock);
1860 if (!(fmode & FMODE_READ))
1861 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1862 if (!(fmode & FMODE_WRITE))
1863 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1864 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1865 spin_unlock(&state->owner->so_lock);
1868 static void nfs4_close_done(struct rpc_task *task, void *data)
1870 struct nfs4_closedata *calldata = data;
1871 struct nfs4_state *state = calldata->state;
1872 struct nfs_server *server = NFS_SERVER(calldata->inode);
1874 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1876 /* hmm. we are done with the inode, and in the process of freeing
1877 * the state_owner. we keep this around to process errors
1879 switch (task->tk_status) {
1881 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1882 renew_lease(server, calldata->timestamp);
1883 nfs4_close_clear_stateid_flags(state,
1884 calldata->arg.fmode);
1886 case -NFS4ERR_STALE_STATEID:
1887 case -NFS4ERR_OLD_STATEID:
1888 case -NFS4ERR_BAD_STATEID:
1889 case -NFS4ERR_EXPIRED:
1890 if (calldata->arg.fmode == 0)
1893 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1894 rpc_restart_call_prepare(task);
1896 nfs_release_seqid(calldata->arg.seqid);
1897 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1900 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1902 struct nfs4_closedata *calldata = data;
1903 struct nfs4_state *state = calldata->state;
1906 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1909 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1910 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
1911 spin_lock(&state->owner->so_lock);
1912 /* Calculate the change in open mode */
1913 if (state->n_rdwr == 0) {
1914 if (state->n_rdonly == 0) {
1915 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1916 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1917 calldata->arg.fmode &= ~FMODE_READ;
1919 if (state->n_wronly == 0) {
1920 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1921 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1922 calldata->arg.fmode &= ~FMODE_WRITE;
1925 spin_unlock(&state->owner->so_lock);
1928 /* Note: exit _without_ calling nfs4_close_done */
1929 task->tk_action = NULL;
1933 if (calldata->arg.fmode == 0)
1934 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1936 nfs_fattr_init(calldata->res.fattr);
1937 calldata->timestamp = jiffies;
1938 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
1939 &calldata->arg.seq_args, &calldata->res.seq_res,
1942 rpc_call_start(task);
1945 static const struct rpc_call_ops nfs4_close_ops = {
1946 .rpc_call_prepare = nfs4_close_prepare,
1947 .rpc_call_done = nfs4_close_done,
1948 .rpc_release = nfs4_free_closedata,
1952 * It is possible for data to be read/written from a mem-mapped file
1953 * after the sys_close call (which hits the vfs layer as a flush).
1954 * This means that we can't safely call nfsv4 close on a file until
1955 * the inode is cleared. This in turn means that we are not good
1956 * NFSv4 citizens - we do not indicate to the server to update the file's
1957 * share state even when we are done with one of the three share
1958 * stateid's in the inode.
1960 * NOTE: Caller must be holding the sp->so_owner semaphore!
1962 int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait)
1964 struct nfs_server *server = NFS_SERVER(state->inode);
1965 struct nfs4_closedata *calldata;
1966 struct nfs4_state_owner *sp = state->owner;
1967 struct rpc_task *task;
1968 struct rpc_message msg = {
1969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1970 .rpc_cred = state->owner->so_cred,
1972 struct rpc_task_setup task_setup_data = {
1973 .rpc_client = server->client,
1974 .rpc_message = &msg,
1975 .callback_ops = &nfs4_close_ops,
1976 .workqueue = nfsiod_workqueue,
1977 .flags = RPC_TASK_ASYNC,
1979 int status = -ENOMEM;
1981 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1982 if (calldata == NULL)
1984 calldata->inode = state->inode;
1985 calldata->state = state;
1986 calldata->arg.fh = NFS_FH(state->inode);
1987 calldata->arg.stateid = &state->open_stateid;
1988 /* Serialization for the sequence id */
1989 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
1990 if (calldata->arg.seqid == NULL)
1991 goto out_free_calldata;
1992 calldata->arg.fmode = 0;
1993 calldata->arg.bitmask = server->cache_consistency_bitmask;
1994 calldata->res.fattr = &calldata->fattr;
1995 calldata->res.seqid = calldata->arg.seqid;
1996 calldata->res.server = server;
1998 calldata->path = *path;
2000 msg.rpc_argp = &calldata->arg;
2001 msg.rpc_resp = &calldata->res;
2002 task_setup_data.callback_data = calldata;
2003 task = rpc_run_task(&task_setup_data);
2005 return PTR_ERR(task);
2008 status = rpc_wait_for_completion_task(task);
2014 nfs4_put_open_state(state);
2015 nfs4_put_state_owner(sp);
2019 static struct inode *
2020 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2022 struct nfs4_state *state;
2024 /* Protect against concurrent sillydeletes */
2025 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
2027 return ERR_CAST(state);
2029 return igrab(state->inode);
2032 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2034 if (ctx->state == NULL)
2037 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2039 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2042 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2044 struct nfs4_server_caps_arg args = {
2047 struct nfs4_server_caps_res res = {};
2048 struct rpc_message msg = {
2049 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2055 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2057 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2058 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2059 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2060 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2061 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2062 NFS_CAP_CTIME|NFS_CAP_MTIME);
2063 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2064 server->caps |= NFS_CAP_ACLS;
2065 if (res.has_links != 0)
2066 server->caps |= NFS_CAP_HARDLINKS;
2067 if (res.has_symlinks != 0)
2068 server->caps |= NFS_CAP_SYMLINKS;
2069 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2070 server->caps |= NFS_CAP_FILEID;
2071 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2072 server->caps |= NFS_CAP_MODE;
2073 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2074 server->caps |= NFS_CAP_NLINK;
2075 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2076 server->caps |= NFS_CAP_OWNER;
2077 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2078 server->caps |= NFS_CAP_OWNER_GROUP;
2079 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2080 server->caps |= NFS_CAP_ATIME;
2081 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2082 server->caps |= NFS_CAP_CTIME;
2083 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2084 server->caps |= NFS_CAP_MTIME;
2086 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2087 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2088 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2089 server->acl_bitmask = res.acl_bitmask;
2095 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2097 struct nfs4_exception exception = { };
2100 err = nfs4_handle_exception(server,
2101 _nfs4_server_capabilities(server, fhandle),
2103 } while (exception.retry);
2107 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2108 struct nfs_fsinfo *info)
2110 struct nfs4_lookup_root_arg args = {
2111 .bitmask = nfs4_fattr_bitmap,
2113 struct nfs4_lookup_res res = {
2115 .fattr = info->fattr,
2118 struct rpc_message msg = {
2119 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2124 nfs_fattr_init(info->fattr);
2125 return nfs4_call_sync(server, &msg, &args, &res, 0);
2128 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2129 struct nfs_fsinfo *info)
2131 struct nfs4_exception exception = { };
2134 err = nfs4_handle_exception(server,
2135 _nfs4_lookup_root(server, fhandle, info),
2137 } while (exception.retry);
2142 * get the file handle for the "/" directory on the server
2144 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2145 struct nfs_fsinfo *info)
2149 status = nfs4_lookup_root(server, fhandle, info);
2151 status = nfs4_server_capabilities(server, fhandle);
2153 status = nfs4_do_fsinfo(server, fhandle, info);
2154 return nfs4_map_errors(status);
2158 * Get locations and (maybe) other attributes of a referral.
2159 * Note that we'll actually follow the referral later when
2160 * we detect fsid mismatch in inode revalidation
2162 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2164 int status = -ENOMEM;
2165 struct page *page = NULL;
2166 struct nfs4_fs_locations *locations = NULL;
2168 page = alloc_page(GFP_KERNEL);
2171 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2172 if (locations == NULL)
2175 status = nfs4_proc_fs_locations(dir, name, locations, page);
2178 /* Make sure server returned a different fsid for the referral */
2179 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2180 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2185 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2186 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2188 fattr->mode = S_IFDIR;
2189 memset(fhandle, 0, sizeof(struct nfs_fh));
2197 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2199 struct nfs4_getattr_arg args = {
2201 .bitmask = server->attr_bitmask,
2203 struct nfs4_getattr_res res = {
2207 struct rpc_message msg = {
2208 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2213 nfs_fattr_init(fattr);
2214 return nfs4_call_sync(server, &msg, &args, &res, 0);
2217 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2219 struct nfs4_exception exception = { };
2222 err = nfs4_handle_exception(server,
2223 _nfs4_proc_getattr(server, fhandle, fattr),
2225 } while (exception.retry);
2230 * The file is not closed if it is opened due to the a request to change
2231 * the size of the file. The open call will not be needed once the
2232 * VFS layer lookup-intents are implemented.
2234 * Close is called when the inode is destroyed.
2235 * If we haven't opened the file for O_WRONLY, we
2236 * need to in the size_change case to obtain a stateid.
2239 * Because OPEN is always done by name in nfsv4, it is
2240 * possible that we opened a different file by the same
2241 * name. We can recognize this race condition, but we
2242 * can't do anything about it besides returning an error.
2244 * This will be fixed with VFS changes (lookup-intent).
2247 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2248 struct iattr *sattr)
2250 struct inode *inode = dentry->d_inode;
2251 struct rpc_cred *cred = NULL;
2252 struct nfs4_state *state = NULL;
2255 nfs_fattr_init(fattr);
2257 /* Search for an existing open(O_WRITE) file */
2258 if (sattr->ia_valid & ATTR_FILE) {
2259 struct nfs_open_context *ctx;
2261 ctx = nfs_file_open_context(sattr->ia_file);
2268 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2270 nfs_setattr_update_inode(inode, sattr);
2274 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2275 const struct qstr *name, struct nfs_fh *fhandle,
2276 struct nfs_fattr *fattr)
2279 struct nfs4_lookup_arg args = {
2280 .bitmask = server->attr_bitmask,
2284 struct nfs4_lookup_res res = {
2289 struct rpc_message msg = {
2290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2295 nfs_fattr_init(fattr);
2297 dprintk("NFS call lookupfh %s\n", name->name);
2298 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2299 dprintk("NFS reply lookupfh: %d\n", status);
2303 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2304 struct qstr *name, struct nfs_fh *fhandle,
2305 struct nfs_fattr *fattr)
2307 struct nfs4_exception exception = { };
2310 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2312 if (err == -NFS4ERR_MOVED) {
2316 err = nfs4_handle_exception(server, err, &exception);
2317 } while (exception.retry);
2321 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2322 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2326 dprintk("NFS call lookup %s\n", name->name);
2327 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2328 if (status == -NFS4ERR_MOVED)
2329 status = nfs4_get_referral(dir, name, fattr, fhandle);
2330 dprintk("NFS reply lookup: %d\n", status);
2334 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2336 struct nfs4_exception exception = { };
2339 err = nfs4_handle_exception(NFS_SERVER(dir),
2340 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2342 } while (exception.retry);
2346 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2348 struct nfs_server *server = NFS_SERVER(inode);
2349 struct nfs4_accessargs args = {
2350 .fh = NFS_FH(inode),
2351 .bitmask = server->attr_bitmask,
2353 struct nfs4_accessres res = {
2356 struct rpc_message msg = {
2357 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2360 .rpc_cred = entry->cred,
2362 int mode = entry->mask;
2366 * Determine which access bits we want to ask for...
2368 if (mode & MAY_READ)
2369 args.access |= NFS4_ACCESS_READ;
2370 if (S_ISDIR(inode->i_mode)) {
2371 if (mode & MAY_WRITE)
2372 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2373 if (mode & MAY_EXEC)
2374 args.access |= NFS4_ACCESS_LOOKUP;
2376 if (mode & MAY_WRITE)
2377 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2378 if (mode & MAY_EXEC)
2379 args.access |= NFS4_ACCESS_EXECUTE;
2382 res.fattr = nfs_alloc_fattr();
2383 if (res.fattr == NULL)
2386 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2389 if (res.access & NFS4_ACCESS_READ)
2390 entry->mask |= MAY_READ;
2391 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2392 entry->mask |= MAY_WRITE;
2393 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2394 entry->mask |= MAY_EXEC;
2395 nfs_refresh_inode(inode, res.fattr);
2397 nfs_free_fattr(res.fattr);
2401 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2403 struct nfs4_exception exception = { };
2406 err = nfs4_handle_exception(NFS_SERVER(inode),
2407 _nfs4_proc_access(inode, entry),
2409 } while (exception.retry);
2414 * TODO: For the time being, we don't try to get any attributes
2415 * along with any of the zero-copy operations READ, READDIR,
2418 * In the case of the first three, we want to put the GETATTR
2419 * after the read-type operation -- this is because it is hard
2420 * to predict the length of a GETATTR response in v4, and thus
2421 * align the READ data correctly. This means that the GETATTR
2422 * may end up partially falling into the page cache, and we should
2423 * shift it into the 'tail' of the xdr_buf before processing.
2424 * To do this efficiently, we need to know the total length
2425 * of data received, which doesn't seem to be available outside
2428 * In the case of WRITE, we also want to put the GETATTR after
2429 * the operation -- in this case because we want to make sure
2430 * we get the post-operation mtime and size. This means that
2431 * we can't use xdr_encode_pages() as written: we need a variant
2432 * of it which would leave room in the 'tail' iovec.
2434 * Both of these changes to the XDR layer would in fact be quite
2435 * minor, but I decided to leave them for a subsequent patch.
2437 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2438 unsigned int pgbase, unsigned int pglen)
2440 struct nfs4_readlink args = {
2441 .fh = NFS_FH(inode),
2446 struct nfs4_readlink_res res;
2447 struct rpc_message msg = {
2448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2453 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2456 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2457 unsigned int pgbase, unsigned int pglen)
2459 struct nfs4_exception exception = { };
2462 err = nfs4_handle_exception(NFS_SERVER(inode),
2463 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2465 } while (exception.retry);
2471 * We will need to arrange for the VFS layer to provide an atomic open.
2472 * Until then, this create/open method is prone to inefficiency and race
2473 * conditions due to the lookup, create, and open VFS calls from sys_open()
2474 * placed on the wire.
2476 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2477 * The file will be opened again in the subsequent VFS open call
2478 * (nfs4_proc_file_open).
2480 * The open for read will just hang around to be used by any process that
2481 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2485 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2486 int flags, struct nfs_open_context *ctx)
2488 struct path my_path = {
2491 struct path *path = &my_path;
2492 struct nfs4_state *state;
2493 struct rpc_cred *cred = NULL;
2502 sattr->ia_mode &= ~current_umask();
2503 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
2505 if (IS_ERR(state)) {
2506 status = PTR_ERR(state);
2509 d_add(dentry, igrab(state->inode));
2510 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2514 nfs4_close_sync(path, state, fmode);
2519 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2521 struct nfs_server *server = NFS_SERVER(dir);
2522 struct nfs_removeargs args = {
2524 .name.len = name->len,
2525 .name.name = name->name,
2526 .bitmask = server->attr_bitmask,
2528 struct nfs_removeres res = {
2531 struct rpc_message msg = {
2532 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2536 int status = -ENOMEM;
2538 res.dir_attr = nfs_alloc_fattr();
2539 if (res.dir_attr == NULL)
2542 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2544 update_changeattr(dir, &res.cinfo);
2545 nfs_post_op_update_inode(dir, res.dir_attr);
2547 nfs_free_fattr(res.dir_attr);
2552 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2554 struct nfs4_exception exception = { };
2557 err = nfs4_handle_exception(NFS_SERVER(dir),
2558 _nfs4_proc_remove(dir, name),
2560 } while (exception.retry);
2564 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2566 struct nfs_server *server = NFS_SERVER(dir);
2567 struct nfs_removeargs *args = msg->rpc_argp;
2568 struct nfs_removeres *res = msg->rpc_resp;
2570 args->bitmask = server->cache_consistency_bitmask;
2571 res->server = server;
2572 res->seq_res.sr_slot = NULL;
2573 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2576 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2578 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2580 if (!nfs4_sequence_done(task, &res->seq_res))
2582 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2584 update_changeattr(dir, &res->cinfo);
2585 nfs_post_op_update_inode(dir, res->dir_attr);
2589 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2591 struct nfs_server *server = NFS_SERVER(dir);
2592 struct nfs_renameargs *arg = msg->rpc_argp;
2593 struct nfs_renameres *res = msg->rpc_resp;
2595 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2596 arg->bitmask = server->attr_bitmask;
2597 res->server = server;
2600 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2601 struct inode *new_dir)
2603 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2605 if (!nfs4_sequence_done(task, &res->seq_res))
2607 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2610 update_changeattr(old_dir, &res->old_cinfo);
2611 nfs_post_op_update_inode(old_dir, res->old_fattr);
2612 update_changeattr(new_dir, &res->new_cinfo);
2613 nfs_post_op_update_inode(new_dir, res->new_fattr);
2617 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2618 struct inode *new_dir, struct qstr *new_name)
2620 struct nfs_server *server = NFS_SERVER(old_dir);
2621 struct nfs_renameargs arg = {
2622 .old_dir = NFS_FH(old_dir),
2623 .new_dir = NFS_FH(new_dir),
2624 .old_name = old_name,
2625 .new_name = new_name,
2626 .bitmask = server->attr_bitmask,
2628 struct nfs_renameres res = {
2631 struct rpc_message msg = {
2632 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2636 int status = -ENOMEM;
2638 res.old_fattr = nfs_alloc_fattr();
2639 res.new_fattr = nfs_alloc_fattr();
2640 if (res.old_fattr == NULL || res.new_fattr == NULL)
2643 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2645 update_changeattr(old_dir, &res.old_cinfo);
2646 nfs_post_op_update_inode(old_dir, res.old_fattr);
2647 update_changeattr(new_dir, &res.new_cinfo);
2648 nfs_post_op_update_inode(new_dir, res.new_fattr);
2651 nfs_free_fattr(res.new_fattr);
2652 nfs_free_fattr(res.old_fattr);
2656 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2657 struct inode *new_dir, struct qstr *new_name)
2659 struct nfs4_exception exception = { };
2662 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2663 _nfs4_proc_rename(old_dir, old_name,
2666 } while (exception.retry);
2670 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2672 struct nfs_server *server = NFS_SERVER(inode);
2673 struct nfs4_link_arg arg = {
2674 .fh = NFS_FH(inode),
2675 .dir_fh = NFS_FH(dir),
2677 .bitmask = server->attr_bitmask,
2679 struct nfs4_link_res res = {
2682 struct rpc_message msg = {
2683 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2687 int status = -ENOMEM;
2689 res.fattr = nfs_alloc_fattr();
2690 res.dir_attr = nfs_alloc_fattr();
2691 if (res.fattr == NULL || res.dir_attr == NULL)
2694 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2696 update_changeattr(dir, &res.cinfo);
2697 nfs_post_op_update_inode(dir, res.dir_attr);
2698 nfs_post_op_update_inode(inode, res.fattr);
2701 nfs_free_fattr(res.dir_attr);
2702 nfs_free_fattr(res.fattr);
2706 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2708 struct nfs4_exception exception = { };
2711 err = nfs4_handle_exception(NFS_SERVER(inode),
2712 _nfs4_proc_link(inode, dir, name),
2714 } while (exception.retry);
2718 struct nfs4_createdata {
2719 struct rpc_message msg;
2720 struct nfs4_create_arg arg;
2721 struct nfs4_create_res res;
2723 struct nfs_fattr fattr;
2724 struct nfs_fattr dir_fattr;
2727 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2728 struct qstr *name, struct iattr *sattr, u32 ftype)
2730 struct nfs4_createdata *data;
2732 data = kzalloc(sizeof(*data), GFP_KERNEL);
2734 struct nfs_server *server = NFS_SERVER(dir);
2736 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2737 data->msg.rpc_argp = &data->arg;
2738 data->msg.rpc_resp = &data->res;
2739 data->arg.dir_fh = NFS_FH(dir);
2740 data->arg.server = server;
2741 data->arg.name = name;
2742 data->arg.attrs = sattr;
2743 data->arg.ftype = ftype;
2744 data->arg.bitmask = server->attr_bitmask;
2745 data->res.server = server;
2746 data->res.fh = &data->fh;
2747 data->res.fattr = &data->fattr;
2748 data->res.dir_fattr = &data->dir_fattr;
2749 nfs_fattr_init(data->res.fattr);
2750 nfs_fattr_init(data->res.dir_fattr);
2755 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2757 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2758 &data->arg, &data->res, 1);
2760 update_changeattr(dir, &data->res.dir_cinfo);
2761 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2762 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2767 static void nfs4_free_createdata(struct nfs4_createdata *data)
2772 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2773 struct page *page, unsigned int len, struct iattr *sattr)
2775 struct nfs4_createdata *data;
2776 int status = -ENAMETOOLONG;
2778 if (len > NFS4_MAXPATHLEN)
2782 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2786 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2787 data->arg.u.symlink.pages = &page;
2788 data->arg.u.symlink.len = len;
2790 status = nfs4_do_create(dir, dentry, data);
2792 nfs4_free_createdata(data);
2797 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2798 struct page *page, unsigned int len, struct iattr *sattr)
2800 struct nfs4_exception exception = { };
2803 err = nfs4_handle_exception(NFS_SERVER(dir),
2804 _nfs4_proc_symlink(dir, dentry, page,
2807 } while (exception.retry);
2811 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2812 struct iattr *sattr)
2814 struct nfs4_createdata *data;
2815 int status = -ENOMEM;
2817 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2821 status = nfs4_do_create(dir, dentry, data);
2823 nfs4_free_createdata(data);
2828 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2829 struct iattr *sattr)
2831 struct nfs4_exception exception = { };
2834 sattr->ia_mode &= ~current_umask();
2836 err = nfs4_handle_exception(NFS_SERVER(dir),
2837 _nfs4_proc_mkdir(dir, dentry, sattr),
2839 } while (exception.retry);
2843 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2844 u64 cookie, struct page **pages, unsigned int count, int plus)
2846 struct inode *dir = dentry->d_inode;
2847 struct nfs4_readdir_arg args = {
2852 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2855 struct nfs4_readdir_res res;
2856 struct rpc_message msg = {
2857 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2864 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2865 dentry->d_parent->d_name.name,
2866 dentry->d_name.name,
2867 (unsigned long long)cookie);
2868 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2869 res.pgbase = args.pgbase;
2870 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2872 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2873 status += args.pgbase;
2876 nfs_invalidate_atime(dir);
2878 dprintk("%s: returns %d\n", __func__, status);
2882 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2883 u64 cookie, struct page **pages, unsigned int count, int plus)
2885 struct nfs4_exception exception = { };
2888 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2889 _nfs4_proc_readdir(dentry, cred, cookie,
2890 pages, count, plus),
2892 } while (exception.retry);
2896 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2897 struct iattr *sattr, dev_t rdev)
2899 struct nfs4_createdata *data;
2900 int mode = sattr->ia_mode;
2901 int status = -ENOMEM;
2903 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2904 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2906 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2911 data->arg.ftype = NF4FIFO;
2912 else if (S_ISBLK(mode)) {
2913 data->arg.ftype = NF4BLK;
2914 data->arg.u.device.specdata1 = MAJOR(rdev);
2915 data->arg.u.device.specdata2 = MINOR(rdev);
2917 else if (S_ISCHR(mode)) {
2918 data->arg.ftype = NF4CHR;
2919 data->arg.u.device.specdata1 = MAJOR(rdev);
2920 data->arg.u.device.specdata2 = MINOR(rdev);
2923 status = nfs4_do_create(dir, dentry, data);
2925 nfs4_free_createdata(data);
2930 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2931 struct iattr *sattr, dev_t rdev)
2933 struct nfs4_exception exception = { };
2936 sattr->ia_mode &= ~current_umask();
2938 err = nfs4_handle_exception(NFS_SERVER(dir),
2939 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2941 } while (exception.retry);
2945 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2946 struct nfs_fsstat *fsstat)
2948 struct nfs4_statfs_arg args = {
2950 .bitmask = server->attr_bitmask,
2952 struct nfs4_statfs_res res = {
2955 struct rpc_message msg = {
2956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2961 nfs_fattr_init(fsstat->fattr);
2962 return nfs4_call_sync(server, &msg, &args, &res, 0);
2965 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2967 struct nfs4_exception exception = { };
2970 err = nfs4_handle_exception(server,
2971 _nfs4_proc_statfs(server, fhandle, fsstat),
2973 } while (exception.retry);
2977 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2978 struct nfs_fsinfo *fsinfo)
2980 struct nfs4_fsinfo_arg args = {
2982 .bitmask = server->attr_bitmask,
2984 struct nfs4_fsinfo_res res = {
2987 struct rpc_message msg = {
2988 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2993 return nfs4_call_sync(server, &msg, &args, &res, 0);
2996 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2998 struct nfs4_exception exception = { };
3002 err = nfs4_handle_exception(server,
3003 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3005 } while (exception.retry);
3009 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3011 nfs_fattr_init(fsinfo->fattr);
3012 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3015 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3016 struct nfs_pathconf *pathconf)
3018 struct nfs4_pathconf_arg args = {
3020 .bitmask = server->attr_bitmask,
3022 struct nfs4_pathconf_res res = {
3023 .pathconf = pathconf,
3025 struct rpc_message msg = {
3026 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3031 /* None of the pathconf attributes are mandatory to implement */
3032 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3033 memset(pathconf, 0, sizeof(*pathconf));
3037 nfs_fattr_init(pathconf->fattr);
3038 return nfs4_call_sync(server, &msg, &args, &res, 0);
3041 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3042 struct nfs_pathconf *pathconf)
3044 struct nfs4_exception exception = { };
3048 err = nfs4_handle_exception(server,
3049 _nfs4_proc_pathconf(server, fhandle, pathconf),
3051 } while (exception.retry);
3055 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3057 struct nfs_server *server = NFS_SERVER(data->inode);
3059 dprintk("--> %s\n", __func__);
3061 if (!nfs4_sequence_done(task, &data->res.seq_res))
3064 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3065 nfs_restart_rpc(task, server->nfs_client);
3069 nfs_invalidate_atime(data->inode);
3070 if (task->tk_status > 0)
3071 renew_lease(server, data->timestamp);
3075 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3077 data->timestamp = jiffies;
3078 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3081 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3083 struct inode *inode = data->inode;
3085 if (!nfs4_sequence_done(task, &data->res.seq_res))
3088 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3089 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3092 if (task->tk_status >= 0) {
3093 renew_lease(NFS_SERVER(inode), data->timestamp);
3094 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3099 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3101 struct nfs_server *server = NFS_SERVER(data->inode);
3103 data->args.bitmask = server->cache_consistency_bitmask;
3104 data->res.server = server;
3105 data->timestamp = jiffies;
3107 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3110 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3112 struct inode *inode = data->inode;
3114 if (!nfs4_sequence_done(task, &data->res.seq_res))
3117 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3118 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3121 nfs_refresh_inode(inode, data->res.fattr);
3125 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3127 struct nfs_server *server = NFS_SERVER(data->inode);
3129 data->args.bitmask = server->cache_consistency_bitmask;
3130 data->res.server = server;
3131 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3134 struct nfs4_renewdata {
3135 struct nfs_client *client;
3136 unsigned long timestamp;
3140 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3141 * standalone procedure for queueing an asynchronous RENEW.
3143 static void nfs4_renew_release(void *calldata)
3145 struct nfs4_renewdata *data = calldata;
3146 struct nfs_client *clp = data->client;
3148 if (atomic_read(&clp->cl_count) > 1)
3149 nfs4_schedule_state_renewal(clp);
3150 nfs_put_client(clp);
3154 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3156 struct nfs4_renewdata *data = calldata;
3157 struct nfs_client *clp = data->client;
3158 unsigned long timestamp = data->timestamp;
3160 if (task->tk_status < 0) {
3161 /* Unless we're shutting down, schedule state recovery! */
3162 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3163 nfs4_schedule_state_recovery(clp);
3166 do_renew_lease(clp, timestamp);
3169 static const struct rpc_call_ops nfs4_renew_ops = {
3170 .rpc_call_done = nfs4_renew_done,
3171 .rpc_release = nfs4_renew_release,
3174 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3176 struct rpc_message msg = {
3177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3181 struct nfs4_renewdata *data;
3183 if (!atomic_inc_not_zero(&clp->cl_count))
3185 data = kmalloc(sizeof(*data), GFP_KERNEL);
3189 data->timestamp = jiffies;
3190 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3191 &nfs4_renew_ops, data);
3194 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3196 struct rpc_message msg = {
3197 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3201 unsigned long now = jiffies;
3204 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3207 do_renew_lease(clp, now);
3211 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3213 return (server->caps & NFS_CAP_ACLS)
3214 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3215 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3218 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3219 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3222 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3224 static void buf_to_pages(const void *buf, size_t buflen,
3225 struct page **pages, unsigned int *pgbase)
3227 const void *p = buf;
3229 *pgbase = offset_in_page(buf);
3231 while (p < buf + buflen) {
3232 *(pages++) = virt_to_page(p);
3233 p += PAGE_CACHE_SIZE;
3237 struct nfs4_cached_acl {
3243 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3245 struct nfs_inode *nfsi = NFS_I(inode);
3247 spin_lock(&inode->i_lock);
3248 kfree(nfsi->nfs4_acl);
3249 nfsi->nfs4_acl = acl;
3250 spin_unlock(&inode->i_lock);
3253 static void nfs4_zap_acl_attr(struct inode *inode)
3255 nfs4_set_cached_acl(inode, NULL);
3258 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3260 struct nfs_inode *nfsi = NFS_I(inode);
3261 struct nfs4_cached_acl *acl;
3264 spin_lock(&inode->i_lock);
3265 acl = nfsi->nfs4_acl;
3268 if (buf == NULL) /* user is just asking for length */
3270 if (acl->cached == 0)
3272 ret = -ERANGE; /* see getxattr(2) man page */
3273 if (acl->len > buflen)
3275 memcpy(buf, acl->data, acl->len);
3279 spin_unlock(&inode->i_lock);
3283 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3285 struct nfs4_cached_acl *acl;
3287 if (buf && acl_len <= PAGE_SIZE) {
3288 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3292 memcpy(acl->data, buf, acl_len);
3294 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3301 nfs4_set_cached_acl(inode, acl);
3304 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3306 struct page *pages[NFS4ACL_MAXPAGES];
3307 struct nfs_getaclargs args = {
3308 .fh = NFS_FH(inode),
3312 struct nfs_getaclres res = {
3316 struct rpc_message msg = {
3317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3321 struct page *localpage = NULL;
3324 if (buflen < PAGE_SIZE) {
3325 /* As long as we're doing a round trip to the server anyway,
3326 * let's be prepared for a page of acl data. */
3327 localpage = alloc_page(GFP_KERNEL);
3328 resp_buf = page_address(localpage);
3329 if (localpage == NULL)
3331 args.acl_pages[0] = localpage;
3332 args.acl_pgbase = 0;
3333 args.acl_len = PAGE_SIZE;
3336 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3338 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3341 if (res.acl_len > args.acl_len)
3342 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3344 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3347 if (res.acl_len > buflen)
3350 memcpy(buf, resp_buf, res.acl_len);
3355 __free_page(localpage);
3359 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3361 struct nfs4_exception exception = { };
3364 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3367 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3368 } while (exception.retry);
3372 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3374 struct nfs_server *server = NFS_SERVER(inode);
3377 if (!nfs4_server_supports_acls(server))
3379 ret = nfs_revalidate_inode(server, inode);
3382 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3383 nfs_zap_acl_cache(inode);
3384 ret = nfs4_read_cached_acl(inode, buf, buflen);
3387 return nfs4_get_acl_uncached(inode, buf, buflen);
3390 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3392 struct nfs_server *server = NFS_SERVER(inode);
3393 struct page *pages[NFS4ACL_MAXPAGES];
3394 struct nfs_setaclargs arg = {
3395 .fh = NFS_FH(inode),
3399 struct nfs_setaclres res;
3400 struct rpc_message msg = {
3401 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3407 if (!nfs4_server_supports_acls(server))
3409 nfs_inode_return_delegation(inode);
3410 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3411 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3413 * Acl update can result in inode attribute update.
3414 * so mark the attribute cache invalid.
3416 spin_lock(&inode->i_lock);
3417 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3418 spin_unlock(&inode->i_lock);
3419 nfs_access_zap_cache(inode);
3420 nfs_zap_acl_cache(inode);
3424 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3426 struct nfs4_exception exception = { };
3429 err = nfs4_handle_exception(NFS_SERVER(inode),
3430 __nfs4_proc_set_acl(inode, buf, buflen),
3432 } while (exception.retry);
3437 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3439 struct nfs_client *clp = server->nfs_client;
3441 if (task->tk_status >= 0)
3443 switch(task->tk_status) {
3444 case -NFS4ERR_ADMIN_REVOKED:
3445 case -NFS4ERR_BAD_STATEID:
3446 case -NFS4ERR_OPENMODE:
3449 nfs4_state_mark_reclaim_nograce(clp, state);
3450 goto do_state_recovery;
3451 case -NFS4ERR_STALE_STATEID:
3452 case -NFS4ERR_STALE_CLIENTID:
3453 case -NFS4ERR_EXPIRED:
3454 goto do_state_recovery;
3455 #if defined(CONFIG_NFS_V4_1)
3456 case -NFS4ERR_BADSESSION:
3457 case -NFS4ERR_BADSLOT:
3458 case -NFS4ERR_BAD_HIGH_SLOT:
3459 case -NFS4ERR_DEADSESSION:
3460 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3461 case -NFS4ERR_SEQ_FALSE_RETRY:
3462 case -NFS4ERR_SEQ_MISORDERED:
3463 dprintk("%s ERROR %d, Reset session\n", __func__,
3465 nfs4_schedule_state_recovery(clp);
3466 task->tk_status = 0;
3468 #endif /* CONFIG_NFS_V4_1 */
3469 case -NFS4ERR_DELAY:
3470 nfs_inc_server_stats(server, NFSIOS_DELAY);
3471 case -NFS4ERR_GRACE:
3473 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3474 task->tk_status = 0;
3476 case -NFS4ERR_OLD_STATEID:
3477 task->tk_status = 0;
3480 task->tk_status = nfs4_map_errors(task->tk_status);
3483 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3484 nfs4_schedule_state_recovery(clp);
3485 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3486 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3487 task->tk_status = 0;
3491 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3492 unsigned short port, struct rpc_cred *cred,
3493 struct nfs4_setclientid_res *res)
3495 nfs4_verifier sc_verifier;
3496 struct nfs4_setclientid setclientid = {
3497 .sc_verifier = &sc_verifier,
3499 .sc_cb_ident = clp->cl_cb_ident,
3501 struct rpc_message msg = {
3502 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3503 .rpc_argp = &setclientid,
3511 p = (__be32*)sc_verifier.data;
3512 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3513 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3516 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3517 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3519 rpc_peeraddr2str(clp->cl_rpcclient,
3521 rpc_peeraddr2str(clp->cl_rpcclient,
3523 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3524 clp->cl_id_uniquifier);
3525 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3526 sizeof(setclientid.sc_netid),
3527 rpc_peeraddr2str(clp->cl_rpcclient,
3528 RPC_DISPLAY_NETID));
3529 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3530 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3531 clp->cl_ipaddr, port >> 8, port & 255);
3533 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3534 if (status != -NFS4ERR_CLID_INUSE)
3539 ssleep(clp->cl_lease_time / HZ + 1);
3541 if (++clp->cl_id_uniquifier == 0)
3547 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3548 struct nfs4_setclientid_res *arg,
3549 struct rpc_cred *cred)
3551 struct nfs_fsinfo fsinfo;
3552 struct rpc_message msg = {
3553 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3555 .rpc_resp = &fsinfo,
3562 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3564 spin_lock(&clp->cl_lock);
3565 clp->cl_lease_time = fsinfo.lease_time * HZ;
3566 clp->cl_last_renewal = now;
3567 spin_unlock(&clp->cl_lock);
3572 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3573 struct nfs4_setclientid_res *arg,
3574 struct rpc_cred *cred)
3579 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
3583 case -NFS4ERR_RESOURCE:
3584 /* The IBM lawyers misread another document! */
3585 case -NFS4ERR_DELAY:
3586 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3592 struct nfs4_delegreturndata {
3593 struct nfs4_delegreturnargs args;
3594 struct nfs4_delegreturnres res;
3596 nfs4_stateid stateid;
3597 unsigned long timestamp;
3598 struct nfs_fattr fattr;
3602 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3604 struct nfs4_delegreturndata *data = calldata;
3606 if (!nfs4_sequence_done(task, &data->res.seq_res))
3609 switch (task->tk_status) {
3610 case -NFS4ERR_STALE_STATEID:
3611 case -NFS4ERR_EXPIRED:
3613 renew_lease(data->res.server, data->timestamp);
3616 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3618 nfs_restart_rpc(task, data->res.server->nfs_client);
3622 data->rpc_status = task->tk_status;
3625 static void nfs4_delegreturn_release(void *calldata)
3630 #if defined(CONFIG_NFS_V4_1)
3631 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3633 struct nfs4_delegreturndata *d_data;
3635 d_data = (struct nfs4_delegreturndata *)data;
3637 if (nfs4_setup_sequence(d_data->res.server,
3638 &d_data->args.seq_args,
3639 &d_data->res.seq_res, 1, task))
3641 rpc_call_start(task);
3643 #endif /* CONFIG_NFS_V4_1 */
3645 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3646 #if defined(CONFIG_NFS_V4_1)
3647 .rpc_call_prepare = nfs4_delegreturn_prepare,
3648 #endif /* CONFIG_NFS_V4_1 */
3649 .rpc_call_done = nfs4_delegreturn_done,
3650 .rpc_release = nfs4_delegreturn_release,
3653 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3655 struct nfs4_delegreturndata *data;
3656 struct nfs_server *server = NFS_SERVER(inode);
3657 struct rpc_task *task;
3658 struct rpc_message msg = {
3659 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3662 struct rpc_task_setup task_setup_data = {
3663 .rpc_client = server->client,
3664 .rpc_message = &msg,
3665 .callback_ops = &nfs4_delegreturn_ops,
3666 .flags = RPC_TASK_ASYNC,
3670 data = kzalloc(sizeof(*data), GFP_NOFS);
3673 data->args.fhandle = &data->fh;
3674 data->args.stateid = &data->stateid;
3675 data->args.bitmask = server->attr_bitmask;
3676 nfs_copy_fh(&data->fh, NFS_FH(inode));
3677 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3678 data->res.fattr = &data->fattr;
3679 data->res.server = server;
3680 nfs_fattr_init(data->res.fattr);
3681 data->timestamp = jiffies;
3682 data->rpc_status = 0;
3684 task_setup_data.callback_data = data;
3685 msg.rpc_argp = &data->args;
3686 msg.rpc_resp = &data->res;
3687 task = rpc_run_task(&task_setup_data);
3689 return PTR_ERR(task);
3692 status = nfs4_wait_for_completion_rpc_task(task);
3695 status = data->rpc_status;
3698 nfs_refresh_inode(inode, &data->fattr);
3704 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3706 struct nfs_server *server = NFS_SERVER(inode);
3707 struct nfs4_exception exception = { };
3710 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3712 case -NFS4ERR_STALE_STATEID:
3713 case -NFS4ERR_EXPIRED:
3717 err = nfs4_handle_exception(server, err, &exception);
3718 } while (exception.retry);
3722 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3723 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3726 * sleep, with exponential backoff, and retry the LOCK operation.
3728 static unsigned long
3729 nfs4_set_lock_task_retry(unsigned long timeout)
3731 schedule_timeout_killable(timeout);
3733 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3734 return NFS4_LOCK_MAXTIMEOUT;
3738 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3740 struct inode *inode = state->inode;
3741 struct nfs_server *server = NFS_SERVER(inode);
3742 struct nfs_client *clp = server->nfs_client;
3743 struct nfs_lockt_args arg = {
3744 .fh = NFS_FH(inode),
3747 struct nfs_lockt_res res = {
3750 struct rpc_message msg = {
3751 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3754 .rpc_cred = state->owner->so_cred,
3756 struct nfs4_lock_state *lsp;
3759 arg.lock_owner.clientid = clp->cl_clientid;
3760 status = nfs4_set_lock_state(state, request);
3763 lsp = request->fl_u.nfs4_fl.owner;
3764 arg.lock_owner.id = lsp->ls_id.id;
3765 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3768 request->fl_type = F_UNLCK;
3770 case -NFS4ERR_DENIED:
3773 request->fl_ops->fl_release_private(request);
3778 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3780 struct nfs4_exception exception = { };
3784 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3785 _nfs4_proc_getlk(state, cmd, request),
3787 } while (exception.retry);
3791 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3794 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3796 res = posix_lock_file_wait(file, fl);
3799 res = flock_lock_file_wait(file, fl);
3807 struct nfs4_unlockdata {
3808 struct nfs_locku_args arg;
3809 struct nfs_locku_res res;
3810 struct nfs4_lock_state *lsp;
3811 struct nfs_open_context *ctx;
3812 struct file_lock fl;
3813 const struct nfs_server *server;
3814 unsigned long timestamp;
3817 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3818 struct nfs_open_context *ctx,
3819 struct nfs4_lock_state *lsp,
3820 struct nfs_seqid *seqid)
3822 struct nfs4_unlockdata *p;
3823 struct inode *inode = lsp->ls_state->inode;
3825 p = kzalloc(sizeof(*p), GFP_NOFS);
3828 p->arg.fh = NFS_FH(inode);
3830 p->arg.seqid = seqid;
3831 p->res.seqid = seqid;
3832 p->arg.stateid = &lsp->ls_stateid;
3834 atomic_inc(&lsp->ls_count);
3835 /* Ensure we don't close file until we're done freeing locks! */
3836 p->ctx = get_nfs_open_context(ctx);
3837 memcpy(&p->fl, fl, sizeof(p->fl));
3838 p->server = NFS_SERVER(inode);
3842 static void nfs4_locku_release_calldata(void *data)
3844 struct nfs4_unlockdata *calldata = data;
3845 nfs_free_seqid(calldata->arg.seqid);
3846 nfs4_put_lock_state(calldata->lsp);
3847 put_nfs_open_context(calldata->ctx);
3851 static void nfs4_locku_done(struct rpc_task *task, void *data)
3853 struct nfs4_unlockdata *calldata = data;
3855 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3857 switch (task->tk_status) {
3859 memcpy(calldata->lsp->ls_stateid.data,
3860 calldata->res.stateid.data,
3861 sizeof(calldata->lsp->ls_stateid.data));
3862 renew_lease(calldata->server, calldata->timestamp);
3864 case -NFS4ERR_BAD_STATEID:
3865 case -NFS4ERR_OLD_STATEID:
3866 case -NFS4ERR_STALE_STATEID:
3867 case -NFS4ERR_EXPIRED:
3870 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3871 nfs_restart_rpc(task,
3872 calldata->server->nfs_client);
3876 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3878 struct nfs4_unlockdata *calldata = data;
3880 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3882 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3883 /* Note: exit _without_ running nfs4_locku_done */
3884 task->tk_action = NULL;
3887 calldata->timestamp = jiffies;
3888 if (nfs4_setup_sequence(calldata->server,
3889 &calldata->arg.seq_args,
3890 &calldata->res.seq_res, 1, task))
3892 rpc_call_start(task);
3895 static const struct rpc_call_ops nfs4_locku_ops = {
3896 .rpc_call_prepare = nfs4_locku_prepare,
3897 .rpc_call_done = nfs4_locku_done,
3898 .rpc_release = nfs4_locku_release_calldata,
3901 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3902 struct nfs_open_context *ctx,
3903 struct nfs4_lock_state *lsp,
3904 struct nfs_seqid *seqid)
3906 struct nfs4_unlockdata *data;
3907 struct rpc_message msg = {
3908 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3909 .rpc_cred = ctx->cred,
3911 struct rpc_task_setup task_setup_data = {
3912 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3913 .rpc_message = &msg,
3914 .callback_ops = &nfs4_locku_ops,
3915 .workqueue = nfsiod_workqueue,
3916 .flags = RPC_TASK_ASYNC,
3919 /* Ensure this is an unlock - when canceling a lock, the
3920 * canceled lock is passed in, and it won't be an unlock.
3922 fl->fl_type = F_UNLCK;
3924 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3926 nfs_free_seqid(seqid);
3927 return ERR_PTR(-ENOMEM);
3930 msg.rpc_argp = &data->arg;
3931 msg.rpc_resp = &data->res;
3932 task_setup_data.callback_data = data;
3933 return rpc_run_task(&task_setup_data);
3936 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3938 struct nfs_inode *nfsi = NFS_I(state->inode);
3939 struct nfs_seqid *seqid;
3940 struct nfs4_lock_state *lsp;
3941 struct rpc_task *task;
3943 unsigned char fl_flags = request->fl_flags;
3945 status = nfs4_set_lock_state(state, request);
3946 /* Unlock _before_ we do the RPC call */
3947 request->fl_flags |= FL_EXISTS;
3948 down_read(&nfsi->rwsem);
3949 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3950 up_read(&nfsi->rwsem);
3953 up_read(&nfsi->rwsem);
3956 /* Is this a delegated lock? */
3957 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3959 lsp = request->fl_u.nfs4_fl.owner;
3960 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
3964 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3965 status = PTR_ERR(task);
3968 status = nfs4_wait_for_completion_rpc_task(task);
3971 request->fl_flags = fl_flags;
3975 struct nfs4_lockdata {
3976 struct nfs_lock_args arg;
3977 struct nfs_lock_res res;
3978 struct nfs4_lock_state *lsp;
3979 struct nfs_open_context *ctx;
3980 struct file_lock fl;
3981 unsigned long timestamp;
3984 struct nfs_server *server;
3987 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3988 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
3991 struct nfs4_lockdata *p;
3992 struct inode *inode = lsp->ls_state->inode;
3993 struct nfs_server *server = NFS_SERVER(inode);
3995 p = kzalloc(sizeof(*p), gfp_mask);
3999 p->arg.fh = NFS_FH(inode);
4001 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4002 if (p->arg.open_seqid == NULL)
4004 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4005 if (p->arg.lock_seqid == NULL)
4006 goto out_free_seqid;
4007 p->arg.lock_stateid = &lsp->ls_stateid;
4008 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4009 p->arg.lock_owner.id = lsp->ls_id.id;
4010 p->res.lock_seqid = p->arg.lock_seqid;
4013 atomic_inc(&lsp->ls_count);
4014 p->ctx = get_nfs_open_context(ctx);
4015 memcpy(&p->fl, fl, sizeof(p->fl));
4018 nfs_free_seqid(p->arg.open_seqid);
4024 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4026 struct nfs4_lockdata *data = calldata;
4027 struct nfs4_state *state = data->lsp->ls_state;
4029 dprintk("%s: begin!\n", __func__);
4030 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4032 /* Do we need to do an open_to_lock_owner? */
4033 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4034 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4036 data->arg.open_stateid = &state->stateid;
4037 data->arg.new_lock_owner = 1;
4038 data->res.open_seqid = data->arg.open_seqid;
4040 data->arg.new_lock_owner = 0;
4041 data->timestamp = jiffies;
4042 if (nfs4_setup_sequence(data->server,
4043 &data->arg.seq_args,
4044 &data->res.seq_res, 1, task))
4046 rpc_call_start(task);
4047 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4050 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4052 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4053 nfs4_lock_prepare(task, calldata);
4056 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4058 struct nfs4_lockdata *data = calldata;
4060 dprintk("%s: begin!\n", __func__);
4062 if (!nfs4_sequence_done(task, &data->res.seq_res))
4065 data->rpc_status = task->tk_status;
4066 if (data->arg.new_lock_owner != 0) {
4067 if (data->rpc_status == 0)
4068 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4072 if (data->rpc_status == 0) {
4073 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4074 sizeof(data->lsp->ls_stateid.data));
4075 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4076 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
4079 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4082 static void nfs4_lock_release(void *calldata)
4084 struct nfs4_lockdata *data = calldata;
4086 dprintk("%s: begin!\n", __func__);
4087 nfs_free_seqid(data->arg.open_seqid);
4088 if (data->cancelled != 0) {
4089 struct rpc_task *task;
4090 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4091 data->arg.lock_seqid);
4094 dprintk("%s: cancelling lock!\n", __func__);
4096 nfs_free_seqid(data->arg.lock_seqid);
4097 nfs4_put_lock_state(data->lsp);
4098 put_nfs_open_context(data->ctx);
4100 dprintk("%s: done!\n", __func__);
4103 static const struct rpc_call_ops nfs4_lock_ops = {
4104 .rpc_call_prepare = nfs4_lock_prepare,
4105 .rpc_call_done = nfs4_lock_done,
4106 .rpc_release = nfs4_lock_release,
4109 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4110 .rpc_call_prepare = nfs4_recover_lock_prepare,
4111 .rpc_call_done = nfs4_lock_done,
4112 .rpc_release = nfs4_lock_release,
4115 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4117 struct nfs_client *clp = server->nfs_client;
4118 struct nfs4_state *state = lsp->ls_state;
4121 case -NFS4ERR_ADMIN_REVOKED:
4122 case -NFS4ERR_BAD_STATEID:
4123 case -NFS4ERR_EXPIRED:
4124 if (new_lock_owner != 0 ||
4125 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4126 nfs4_state_mark_reclaim_nograce(clp, state);
4127 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4129 case -NFS4ERR_STALE_STATEID:
4130 if (new_lock_owner != 0 ||
4131 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4132 nfs4_state_mark_reclaim_reboot(clp, state);
4133 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4137 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4139 struct nfs4_lockdata *data;
4140 struct rpc_task *task;
4141 struct rpc_message msg = {
4142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4143 .rpc_cred = state->owner->so_cred,
4145 struct rpc_task_setup task_setup_data = {
4146 .rpc_client = NFS_CLIENT(state->inode),
4147 .rpc_message = &msg,
4148 .callback_ops = &nfs4_lock_ops,
4149 .workqueue = nfsiod_workqueue,
4150 .flags = RPC_TASK_ASYNC,
4154 dprintk("%s: begin!\n", __func__);
4155 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4156 fl->fl_u.nfs4_fl.owner,
4157 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4161 data->arg.block = 1;
4162 if (recovery_type > NFS_LOCK_NEW) {
4163 if (recovery_type == NFS_LOCK_RECLAIM)
4164 data->arg.reclaim = NFS_LOCK_RECLAIM;
4165 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4167 msg.rpc_argp = &data->arg;
4168 msg.rpc_resp = &data->res;
4169 task_setup_data.callback_data = data;
4170 task = rpc_run_task(&task_setup_data);
4172 return PTR_ERR(task);
4173 ret = nfs4_wait_for_completion_rpc_task(task);
4175 ret = data->rpc_status;
4177 nfs4_handle_setlk_error(data->server, data->lsp,
4178 data->arg.new_lock_owner, ret);
4180 data->cancelled = 1;
4182 dprintk("%s: done, ret = %d!\n", __func__, ret);
4186 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4188 struct nfs_server *server = NFS_SERVER(state->inode);
4189 struct nfs4_exception exception = { };
4193 /* Cache the lock if possible... */
4194 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4196 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4197 if (err != -NFS4ERR_DELAY)
4199 nfs4_handle_exception(server, err, &exception);
4200 } while (exception.retry);
4204 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4206 struct nfs_server *server = NFS_SERVER(state->inode);
4207 struct nfs4_exception exception = { };
4210 err = nfs4_set_lock_state(state, request);
4214 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4216 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4220 case -NFS4ERR_GRACE:
4221 case -NFS4ERR_DELAY:
4222 nfs4_handle_exception(server, err, &exception);
4225 } while (exception.retry);
4230 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4232 struct nfs_inode *nfsi = NFS_I(state->inode);
4233 unsigned char fl_flags = request->fl_flags;
4234 int status = -ENOLCK;
4236 if ((fl_flags & FL_POSIX) &&
4237 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4239 /* Is this a delegated open? */
4240 status = nfs4_set_lock_state(state, request);
4243 request->fl_flags |= FL_ACCESS;
4244 status = do_vfs_lock(request->fl_file, request);
4247 down_read(&nfsi->rwsem);
4248 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4249 /* Yes: cache locks! */
4250 /* ...but avoid races with delegation recall... */
4251 request->fl_flags = fl_flags & ~FL_SLEEP;
4252 status = do_vfs_lock(request->fl_file, request);
4255 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4258 /* Note: we always want to sleep here! */
4259 request->fl_flags = fl_flags | FL_SLEEP;
4260 if (do_vfs_lock(request->fl_file, request) < 0)
4261 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4263 up_read(&nfsi->rwsem);
4265 request->fl_flags = fl_flags;
4269 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4271 struct nfs4_exception exception = { };
4275 err = _nfs4_proc_setlk(state, cmd, request);
4276 if (err == -NFS4ERR_DENIED)
4278 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4280 } while (exception.retry);
4285 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4287 struct nfs_open_context *ctx;
4288 struct nfs4_state *state;
4289 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4292 /* verify open state */
4293 ctx = nfs_file_open_context(filp);
4296 if (request->fl_start < 0 || request->fl_end < 0)
4299 if (IS_GETLK(cmd)) {
4301 return nfs4_proc_getlk(state, F_GETLK, request);
4305 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4308 if (request->fl_type == F_UNLCK) {
4310 return nfs4_proc_unlck(state, cmd, request);
4317 status = nfs4_proc_setlk(state, cmd, request);
4318 if ((status != -EAGAIN) || IS_SETLK(cmd))
4320 timeout = nfs4_set_lock_task_retry(timeout);
4321 status = -ERESTARTSYS;
4324 } while(status < 0);
4328 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4330 struct nfs_server *server = NFS_SERVER(state->inode);
4331 struct nfs4_exception exception = { };
4334 err = nfs4_set_lock_state(state, fl);
4338 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4341 printk(KERN_ERR "%s: unhandled error %d.\n",
4346 case -NFS4ERR_EXPIRED:
4347 case -NFS4ERR_STALE_CLIENTID:
4348 case -NFS4ERR_STALE_STATEID:
4349 case -NFS4ERR_BADSESSION:
4350 case -NFS4ERR_BADSLOT:
4351 case -NFS4ERR_BAD_HIGH_SLOT:
4352 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4353 case -NFS4ERR_DEADSESSION:
4354 nfs4_schedule_state_recovery(server->nfs_client);
4358 * The show must go on: exit, but mark the
4359 * stateid as needing recovery.
4361 case -NFS4ERR_ADMIN_REVOKED:
4362 case -NFS4ERR_BAD_STATEID:
4363 case -NFS4ERR_OPENMODE:
4364 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4369 * User RPCSEC_GSS context has expired.
4370 * We cannot recover this stateid now, so
4371 * skip it and allow recovery thread to
4377 case -NFS4ERR_DENIED:
4378 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4381 case -NFS4ERR_DELAY:
4384 err = nfs4_handle_exception(server, err, &exception);
4385 } while (exception.retry);
4390 static void nfs4_release_lockowner_release(void *calldata)
4395 const struct rpc_call_ops nfs4_release_lockowner_ops = {
4396 .rpc_release = nfs4_release_lockowner_release,
4399 void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4401 struct nfs_server *server = lsp->ls_state->owner->so_server;
4402 struct nfs_release_lockowner_args *args;
4403 struct rpc_message msg = {
4404 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4407 if (server->nfs_client->cl_mvops->minor_version != 0)
4409 args = kmalloc(sizeof(*args), GFP_NOFS);
4412 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4413 args->lock_owner.id = lsp->ls_id.id;
4414 msg.rpc_argp = args;
4415 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4418 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4420 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4421 const void *buf, size_t buflen,
4422 int flags, int type)
4424 if (strcmp(key, "") != 0)
4427 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4430 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4431 void *buf, size_t buflen, int type)
4433 if (strcmp(key, "") != 0)
4436 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4439 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4440 size_t list_len, const char *name,
4441 size_t name_len, int type)
4443 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4445 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4448 if (list && len <= list_len)
4449 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4453 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4455 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4456 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4457 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4460 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4461 NFS_ATTR_FATTR_NLINK;
4462 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4466 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4467 struct nfs4_fs_locations *fs_locations, struct page *page)
4469 struct nfs_server *server = NFS_SERVER(dir);
4471 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4472 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4474 struct nfs4_fs_locations_arg args = {
4475 .dir_fh = NFS_FH(dir),
4480 struct nfs4_fs_locations_res res = {
4481 .fs_locations = fs_locations,
4483 struct rpc_message msg = {
4484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4490 dprintk("%s: start\n", __func__);
4491 nfs_fattr_init(&fs_locations->fattr);
4492 fs_locations->server = server;
4493 fs_locations->nlocations = 0;
4494 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4495 nfs_fixup_referral_attributes(&fs_locations->fattr);
4496 dprintk("%s: returned status = %d\n", __func__, status);
4500 #ifdef CONFIG_NFS_V4_1
4502 * nfs4_proc_exchange_id()
4504 * Since the clientid has expired, all compounds using sessions
4505 * associated with the stale clientid will be returning
4506 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4507 * be in some phase of session reset.
4509 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4511 nfs4_verifier verifier;
4512 struct nfs41_exchange_id_args args = {
4514 .flags = clp->cl_exchange_flags,
4516 struct nfs41_exchange_id_res res = {
4520 struct rpc_message msg = {
4521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4528 dprintk("--> %s\n", __func__);
4529 BUG_ON(clp == NULL);
4531 /* Remove server-only flags */
4532 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4534 p = (u32 *)verifier.data;
4535 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4536 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4537 args.verifier = &verifier;
4540 args.id_len = scnprintf(args.id, sizeof(args.id),
4543 rpc_peeraddr2str(clp->cl_rpcclient,
4545 clp->cl_id_uniquifier);
4547 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4549 if (status != -NFS4ERR_CLID_INUSE)
4555 if (++clp->cl_id_uniquifier == 0)
4559 dprintk("<-- %s status= %d\n", __func__, status);
4563 struct nfs4_get_lease_time_data {
4564 struct nfs4_get_lease_time_args *args;
4565 struct nfs4_get_lease_time_res *res;
4566 struct nfs_client *clp;
4569 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4573 struct nfs4_get_lease_time_data *data =
4574 (struct nfs4_get_lease_time_data *)calldata;
4576 dprintk("--> %s\n", __func__);
4577 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4578 /* just setup sequence, do not trigger session recovery
4579 since we're invoked within one */
4580 ret = nfs41_setup_sequence(data->clp->cl_session,
4581 &data->args->la_seq_args,
4582 &data->res->lr_seq_res, 0, task);
4584 BUG_ON(ret == -EAGAIN);
4585 rpc_call_start(task);
4586 dprintk("<-- %s\n", __func__);
4590 * Called from nfs4_state_manager thread for session setup, so don't recover
4591 * from sequence operation or clientid errors.
4593 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4595 struct nfs4_get_lease_time_data *data =
4596 (struct nfs4_get_lease_time_data *)calldata;
4598 dprintk("--> %s\n", __func__);
4599 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4601 switch (task->tk_status) {
4602 case -NFS4ERR_DELAY:
4603 case -NFS4ERR_GRACE:
4604 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4605 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4606 task->tk_status = 0;
4607 nfs_restart_rpc(task, data->clp);
4610 dprintk("<-- %s\n", __func__);
4613 struct rpc_call_ops nfs4_get_lease_time_ops = {
4614 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4615 .rpc_call_done = nfs4_get_lease_time_done,
4618 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4620 struct rpc_task *task;
4621 struct nfs4_get_lease_time_args args;
4622 struct nfs4_get_lease_time_res res = {
4623 .lr_fsinfo = fsinfo,
4625 struct nfs4_get_lease_time_data data = {
4630 struct rpc_message msg = {
4631 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4635 struct rpc_task_setup task_setup = {
4636 .rpc_client = clp->cl_rpcclient,
4637 .rpc_message = &msg,
4638 .callback_ops = &nfs4_get_lease_time_ops,
4639 .callback_data = &data
4643 dprintk("--> %s\n", __func__);
4644 task = rpc_run_task(&task_setup);
4647 status = PTR_ERR(task);
4649 status = task->tk_status;
4652 dprintk("<-- %s return %d\n", __func__, status);
4658 * Reset a slot table
4660 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4663 struct nfs4_slot *new = NULL;
4667 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4668 max_reqs, tbl->max_slots);
4670 /* Does the newly negotiated max_reqs match the existing slot table? */
4671 if (max_reqs != tbl->max_slots) {
4673 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
4680 spin_lock(&tbl->slot_tbl_lock);
4683 tbl->max_slots = max_reqs;
4685 for (i = 0; i < tbl->max_slots; ++i)
4686 tbl->slots[i].seq_nr = ivalue;
4687 spin_unlock(&tbl->slot_tbl_lock);
4688 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4689 tbl, tbl->slots, tbl->max_slots);
4691 dprintk("<-- %s: return %d\n", __func__, ret);
4696 * Reset the forechannel and backchannel slot tables
4698 static int nfs4_reset_slot_tables(struct nfs4_session *session)
4702 status = nfs4_reset_slot_table(&session->fc_slot_table,
4703 session->fc_attrs.max_reqs, 1);
4707 status = nfs4_reset_slot_table(&session->bc_slot_table,
4708 session->bc_attrs.max_reqs, 0);
4712 /* Destroy the slot table */
4713 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4715 if (session->fc_slot_table.slots != NULL) {
4716 kfree(session->fc_slot_table.slots);
4717 session->fc_slot_table.slots = NULL;
4719 if (session->bc_slot_table.slots != NULL) {
4720 kfree(session->bc_slot_table.slots);
4721 session->bc_slot_table.slots = NULL;
4727 * Initialize slot table
4729 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4730 int max_slots, int ivalue)
4732 struct nfs4_slot *slot;
4735 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4737 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4739 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
4744 spin_lock(&tbl->slot_tbl_lock);
4745 tbl->max_slots = max_slots;
4747 tbl->highest_used_slotid = -1; /* no slot is currently used */
4748 spin_unlock(&tbl->slot_tbl_lock);
4749 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4750 tbl, tbl->slots, tbl->max_slots);
4752 dprintk("<-- %s: return %d\n", __func__, ret);
4757 * Initialize the forechannel and backchannel tables
4759 static int nfs4_init_slot_tables(struct nfs4_session *session)
4761 struct nfs4_slot_table *tbl;
4764 tbl = &session->fc_slot_table;
4765 if (tbl->slots == NULL) {
4766 status = nfs4_init_slot_table(tbl,
4767 session->fc_attrs.max_reqs, 1);
4772 tbl = &session->bc_slot_table;
4773 if (tbl->slots == NULL) {
4774 status = nfs4_init_slot_table(tbl,
4775 session->bc_attrs.max_reqs, 0);
4777 nfs4_destroy_slot_tables(session);
4783 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4785 struct nfs4_session *session;
4786 struct nfs4_slot_table *tbl;
4788 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
4792 tbl = &session->fc_slot_table;
4793 tbl->highest_used_slotid = -1;
4794 spin_lock_init(&tbl->slot_tbl_lock);
4795 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4796 init_completion(&tbl->complete);
4798 tbl = &session->bc_slot_table;
4799 tbl->highest_used_slotid = -1;
4800 spin_lock_init(&tbl->slot_tbl_lock);
4801 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4802 init_completion(&tbl->complete);
4804 session->session_state = 1<<NFS4_SESSION_INITING;
4810 void nfs4_destroy_session(struct nfs4_session *session)
4812 nfs4_proc_destroy_session(session);
4813 dprintk("%s Destroy backchannel for xprt %p\n",
4814 __func__, session->clp->cl_rpcclient->cl_xprt);
4815 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4816 NFS41_BC_MIN_CALLBACKS);
4817 nfs4_destroy_slot_tables(session);
4822 * Initialize the values to be used by the client in CREATE_SESSION
4823 * If nfs4_init_session set the fore channel request and response sizes,
4826 * Set the back channel max_resp_sz_cached to zero to force the client to
4827 * always set csa_cachethis to FALSE because the current implementation
4828 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4830 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4832 struct nfs4_session *session = args->client->cl_session;
4833 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4834 mxresp_sz = session->fc_attrs.max_resp_sz;
4837 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4839 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4840 /* Fore channel attributes */
4841 args->fc_attrs.headerpadsz = 0;
4842 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4843 args->fc_attrs.max_resp_sz = mxresp_sz;
4844 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4845 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4847 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4848 "max_ops=%u max_reqs=%u\n",
4850 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4851 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
4853 /* Back channel attributes */
4854 args->bc_attrs.headerpadsz = 0;
4855 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4856 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4857 args->bc_attrs.max_resp_sz_cached = 0;
4858 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4859 args->bc_attrs.max_reqs = 1;
4861 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4862 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4864 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4865 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4866 args->bc_attrs.max_reqs);
4869 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
4871 struct nfs4_channel_attrs *sent = &args->fc_attrs;
4872 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
4874 if (rcvd->headerpadsz > sent->headerpadsz)
4876 if (rcvd->max_resp_sz > sent->max_resp_sz)
4879 * Our requested max_ops is the minimum we need; we're not
4880 * prepared to break up compounds into smaller pieces than that.
4881 * So, no point even trying to continue if the server won't
4884 if (rcvd->max_ops < sent->max_ops)
4886 if (rcvd->max_reqs == 0)
4891 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
4893 struct nfs4_channel_attrs *sent = &args->bc_attrs;
4894 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
4896 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
4898 if (rcvd->max_resp_sz < sent->max_resp_sz)
4900 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
4902 /* These would render the backchannel useless: */
4903 if (rcvd->max_ops == 0)
4905 if (rcvd->max_reqs == 0)
4910 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4911 struct nfs4_session *session)
4915 ret = nfs4_verify_fore_channel_attrs(args, session);
4918 return nfs4_verify_back_channel_attrs(args, session);
4921 static int _nfs4_proc_create_session(struct nfs_client *clp)
4923 struct nfs4_session *session = clp->cl_session;
4924 struct nfs41_create_session_args args = {
4926 .cb_program = NFS4_CALLBACK,
4928 struct nfs41_create_session_res res = {
4931 struct rpc_message msg = {
4932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4938 nfs4_init_channel_attrs(&args);
4939 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
4941 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4944 /* Verify the session's negotiated channel_attrs values */
4945 status = nfs4_verify_channel_attrs(&args, session);
4947 /* Increment the clientid slot sequence id */
4955 * Issues a CREATE_SESSION operation to the server.
4956 * It is the responsibility of the caller to verify the session is
4957 * expired before calling this routine.
4959 int nfs4_proc_create_session(struct nfs_client *clp)
4963 struct nfs4_session *session = clp->cl_session;
4965 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4967 status = _nfs4_proc_create_session(clp);
4971 /* Init and reset the fore channel */
4972 status = nfs4_init_slot_tables(session);
4973 dprintk("slot table initialization returned %d\n", status);
4976 status = nfs4_reset_slot_tables(session);
4977 dprintk("slot table reset returned %d\n", status);
4981 ptr = (unsigned *)&session->sess_id.data[0];
4982 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4983 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4985 dprintk("<-- %s\n", __func__);
4990 * Issue the over-the-wire RPC DESTROY_SESSION.
4991 * The caller must serialize access to this routine.
4993 int nfs4_proc_destroy_session(struct nfs4_session *session)
4996 struct rpc_message msg;
4998 dprintk("--> nfs4_proc_destroy_session\n");
5000 /* session is still being setup */
5001 if (session->clp->cl_cons_state != NFS_CS_READY)
5004 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5005 msg.rpc_argp = session;
5006 msg.rpc_resp = NULL;
5007 msg.rpc_cred = NULL;
5008 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5012 "Got error %d from the server on DESTROY_SESSION. "
5013 "Session has been destroyed regardless...\n", status);
5015 dprintk("<-- nfs4_proc_destroy_session\n");
5019 int nfs4_init_session(struct nfs_server *server)
5021 struct nfs_client *clp = server->nfs_client;
5022 struct nfs4_session *session;
5023 unsigned int rsize, wsize;
5026 if (!nfs4_has_session(clp))
5029 session = clp->cl_session;
5030 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5033 rsize = server->rsize;
5035 rsize = NFS_MAX_FILE_IO_SIZE;
5036 wsize = server->wsize;
5038 wsize = NFS_MAX_FILE_IO_SIZE;
5040 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5041 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5043 ret = nfs4_recover_expired_lease(server);
5045 ret = nfs4_check_client_ready(clp);
5050 * Renew the cl_session lease.
5052 struct nfs4_sequence_data {
5053 struct nfs_client *clp;
5054 struct nfs4_sequence_args args;
5055 struct nfs4_sequence_res res;
5058 static void nfs41_sequence_release(void *data)
5060 struct nfs4_sequence_data *calldata = data;
5061 struct nfs_client *clp = calldata->clp;
5063 if (atomic_read(&clp->cl_count) > 1)
5064 nfs4_schedule_state_renewal(clp);
5065 nfs_put_client(clp);
5069 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5071 switch(task->tk_status) {
5072 case -NFS4ERR_DELAY:
5073 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5076 nfs4_schedule_state_recovery(clp);
5081 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5083 struct nfs4_sequence_data *calldata = data;
5084 struct nfs_client *clp = calldata->clp;
5086 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5089 if (task->tk_status < 0) {
5090 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5091 if (atomic_read(&clp->cl_count) == 1)
5094 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5095 rpc_restart_call_prepare(task);
5099 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5101 dprintk("<-- %s\n", __func__);
5104 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5106 struct nfs4_sequence_data *calldata = data;
5107 struct nfs_client *clp = calldata->clp;
5108 struct nfs4_sequence_args *args;
5109 struct nfs4_sequence_res *res;
5111 args = task->tk_msg.rpc_argp;
5112 res = task->tk_msg.rpc_resp;
5114 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
5116 rpc_call_start(task);
5119 static const struct rpc_call_ops nfs41_sequence_ops = {
5120 .rpc_call_done = nfs41_sequence_call_done,
5121 .rpc_call_prepare = nfs41_sequence_prepare,
5122 .rpc_release = nfs41_sequence_release,
5125 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5127 struct nfs4_sequence_data *calldata;
5128 struct rpc_message msg = {
5129 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5132 struct rpc_task_setup task_setup_data = {
5133 .rpc_client = clp->cl_rpcclient,
5134 .rpc_message = &msg,
5135 .callback_ops = &nfs41_sequence_ops,
5136 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5139 if (!atomic_inc_not_zero(&clp->cl_count))
5140 return ERR_PTR(-EIO);
5141 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5142 if (calldata == NULL) {
5143 nfs_put_client(clp);
5144 return ERR_PTR(-ENOMEM);
5146 msg.rpc_argp = &calldata->args;
5147 msg.rpc_resp = &calldata->res;
5148 calldata->clp = clp;
5149 task_setup_data.callback_data = calldata;
5151 return rpc_run_task(&task_setup_data);
5154 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5156 struct rpc_task *task;
5159 task = _nfs41_proc_sequence(clp, cred);
5161 ret = PTR_ERR(task);
5164 dprintk("<-- %s status=%d\n", __func__, ret);
5168 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5170 struct rpc_task *task;
5173 task = _nfs41_proc_sequence(clp, cred);
5175 ret = PTR_ERR(task);
5178 ret = rpc_wait_for_completion_task(task);
5180 ret = task->tk_status;
5183 dprintk("<-- %s status=%d\n", __func__, ret);
5187 struct nfs4_reclaim_complete_data {
5188 struct nfs_client *clp;
5189 struct nfs41_reclaim_complete_args arg;
5190 struct nfs41_reclaim_complete_res res;
5193 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5195 struct nfs4_reclaim_complete_data *calldata = data;
5197 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5198 if (nfs41_setup_sequence(calldata->clp->cl_session,
5199 &calldata->arg.seq_args,
5200 &calldata->res.seq_res, 0, task))
5203 rpc_call_start(task);
5206 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5208 switch(task->tk_status) {
5210 case -NFS4ERR_COMPLETE_ALREADY:
5211 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5213 case -NFS4ERR_DELAY:
5214 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5217 nfs4_schedule_state_recovery(clp);
5222 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5224 struct nfs4_reclaim_complete_data *calldata = data;
5225 struct nfs_client *clp = calldata->clp;
5226 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5228 dprintk("--> %s\n", __func__);
5229 if (!nfs41_sequence_done(task, res))
5232 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5233 rpc_restart_call_prepare(task);
5236 dprintk("<-- %s\n", __func__);
5239 static void nfs4_free_reclaim_complete_data(void *data)
5241 struct nfs4_reclaim_complete_data *calldata = data;
5246 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5247 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5248 .rpc_call_done = nfs4_reclaim_complete_done,
5249 .rpc_release = nfs4_free_reclaim_complete_data,
5253 * Issue a global reclaim complete.
5255 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5257 struct nfs4_reclaim_complete_data *calldata;
5258 struct rpc_task *task;
5259 struct rpc_message msg = {
5260 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5262 struct rpc_task_setup task_setup_data = {
5263 .rpc_client = clp->cl_rpcclient,
5264 .rpc_message = &msg,
5265 .callback_ops = &nfs4_reclaim_complete_call_ops,
5266 .flags = RPC_TASK_ASYNC,
5268 int status = -ENOMEM;
5270 dprintk("--> %s\n", __func__);
5271 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5272 if (calldata == NULL)
5274 calldata->clp = clp;
5275 calldata->arg.one_fs = 0;
5277 msg.rpc_argp = &calldata->arg;
5278 msg.rpc_resp = &calldata->res;
5279 task_setup_data.callback_data = calldata;
5280 task = rpc_run_task(&task_setup_data);
5282 status = PTR_ERR(task);
5288 dprintk("<-- %s status=%d\n", __func__, status);
5293 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5295 struct nfs4_layoutget *lgp = calldata;
5296 struct inode *ino = lgp->args.inode;
5297 struct nfs_server *server = NFS_SERVER(ino);
5299 dprintk("--> %s\n", __func__);
5300 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5301 &lgp->res.seq_res, 0, task))
5303 rpc_call_start(task);
5306 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5308 struct nfs4_layoutget *lgp = calldata;
5309 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5311 dprintk("--> %s\n", __func__);
5313 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5316 switch (task->tk_status) {
5319 case -NFS4ERR_LAYOUTTRYLATER:
5320 case -NFS4ERR_RECALLCONFLICT:
5321 task->tk_status = -NFS4ERR_DELAY;
5324 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5325 rpc_restart_call_prepare(task);
5329 lgp->status = task->tk_status;
5330 dprintk("<-- %s\n", __func__);
5333 static void nfs4_layoutget_release(void *calldata)
5335 struct nfs4_layoutget *lgp = calldata;
5337 dprintk("--> %s\n", __func__);
5338 put_layout_hdr(lgp->args.inode);
5339 if (lgp->res.layout.buf != NULL)
5340 free_page((unsigned long) lgp->res.layout.buf);
5341 put_nfs_open_context(lgp->args.ctx);
5343 dprintk("<-- %s\n", __func__);
5346 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5347 .rpc_call_prepare = nfs4_layoutget_prepare,
5348 .rpc_call_done = nfs4_layoutget_done,
5349 .rpc_release = nfs4_layoutget_release,
5352 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5354 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5355 struct rpc_task *task;
5356 struct rpc_message msg = {
5357 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5358 .rpc_argp = &lgp->args,
5359 .rpc_resp = &lgp->res,
5361 struct rpc_task_setup task_setup_data = {
5362 .rpc_client = server->client,
5363 .rpc_message = &msg,
5364 .callback_ops = &nfs4_layoutget_call_ops,
5365 .callback_data = lgp,
5366 .flags = RPC_TASK_ASYNC,
5370 dprintk("--> %s\n", __func__);
5372 lgp->res.layout.buf = (void *)__get_free_page(GFP_NOFS);
5373 if (lgp->res.layout.buf == NULL) {
5374 nfs4_layoutget_release(lgp);
5378 lgp->res.seq_res.sr_slot = NULL;
5379 task = rpc_run_task(&task_setup_data);
5381 return PTR_ERR(task);
5382 status = nfs4_wait_for_completion_rpc_task(task);
5385 status = lgp->status;
5388 status = pnfs_layout_process(lgp);
5391 dprintk("<-- %s status=%d\n", __func__, status);
5396 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5398 struct nfs4_getdeviceinfo_args args = {
5401 struct nfs4_getdeviceinfo_res res = {
5404 struct rpc_message msg = {
5405 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5411 dprintk("--> %s\n", __func__);
5412 status = nfs4_call_sync(server, &msg, &args, &res, 0);
5413 dprintk("<-- %s status=%d\n", __func__, status);
5418 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5420 struct nfs4_exception exception = { };
5424 err = nfs4_handle_exception(server,
5425 _nfs4_proc_getdeviceinfo(server, pdev),
5427 } while (exception.retry);
5430 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5432 #endif /* CONFIG_NFS_V4_1 */
5434 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
5435 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5436 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5437 .recover_open = nfs4_open_reclaim,
5438 .recover_lock = nfs4_lock_reclaim,
5439 .establish_clid = nfs4_init_clientid,
5440 .get_clid_cred = nfs4_get_setclientid_cred,
5443 #if defined(CONFIG_NFS_V4_1)
5444 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5445 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5446 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5447 .recover_open = nfs4_open_reclaim,
5448 .recover_lock = nfs4_lock_reclaim,
5449 .establish_clid = nfs41_init_clientid,
5450 .get_clid_cred = nfs4_get_exchange_id_cred,
5451 .reclaim_complete = nfs41_proc_reclaim_complete,
5453 #endif /* CONFIG_NFS_V4_1 */
5455 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5456 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5457 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5458 .recover_open = nfs4_open_expired,
5459 .recover_lock = nfs4_lock_expired,
5460 .establish_clid = nfs4_init_clientid,
5461 .get_clid_cred = nfs4_get_setclientid_cred,
5464 #if defined(CONFIG_NFS_V4_1)
5465 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
5466 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5467 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5468 .recover_open = nfs4_open_expired,
5469 .recover_lock = nfs4_lock_expired,
5470 .establish_clid = nfs41_init_clientid,
5471 .get_clid_cred = nfs4_get_exchange_id_cred,
5473 #endif /* CONFIG_NFS_V4_1 */
5475 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5476 .sched_state_renewal = nfs4_proc_async_renew,
5477 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
5478 .renew_lease = nfs4_proc_renew,
5481 #if defined(CONFIG_NFS_V4_1)
5482 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5483 .sched_state_renewal = nfs41_proc_async_sequence,
5484 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
5485 .renew_lease = nfs4_proc_sequence,
5489 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5491 .call_sync = _nfs4_call_sync,
5492 .validate_stateid = nfs4_validate_delegation_stateid,
5493 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5494 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5495 .state_renewal_ops = &nfs40_state_renewal_ops,
5498 #if defined(CONFIG_NFS_V4_1)
5499 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5501 .call_sync = _nfs4_call_sync_session,
5502 .validate_stateid = nfs41_validate_delegation_stateid,
5503 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5504 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5505 .state_renewal_ops = &nfs41_state_renewal_ops,
5509 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5510 [0] = &nfs_v4_0_minor_ops,
5511 #if defined(CONFIG_NFS_V4_1)
5512 [1] = &nfs_v4_1_minor_ops,
5516 static const struct inode_operations nfs4_file_inode_operations = {
5517 .permission = nfs_permission,
5518 .getattr = nfs_getattr,
5519 .setattr = nfs_setattr,
5520 .getxattr = generic_getxattr,
5521 .setxattr = generic_setxattr,
5522 .listxattr = generic_listxattr,
5523 .removexattr = generic_removexattr,
5526 const struct nfs_rpc_ops nfs_v4_clientops = {
5527 .version = 4, /* protocol version */
5528 .dentry_ops = &nfs4_dentry_operations,
5529 .dir_inode_ops = &nfs4_dir_inode_operations,
5530 .file_inode_ops = &nfs4_file_inode_operations,
5531 .getroot = nfs4_proc_get_root,
5532 .getattr = nfs4_proc_getattr,
5533 .setattr = nfs4_proc_setattr,
5534 .lookupfh = nfs4_proc_lookupfh,
5535 .lookup = nfs4_proc_lookup,
5536 .access = nfs4_proc_access,
5537 .readlink = nfs4_proc_readlink,
5538 .create = nfs4_proc_create,
5539 .remove = nfs4_proc_remove,
5540 .unlink_setup = nfs4_proc_unlink_setup,
5541 .unlink_done = nfs4_proc_unlink_done,
5542 .rename = nfs4_proc_rename,
5543 .rename_setup = nfs4_proc_rename_setup,
5544 .rename_done = nfs4_proc_rename_done,
5545 .link = nfs4_proc_link,
5546 .symlink = nfs4_proc_symlink,
5547 .mkdir = nfs4_proc_mkdir,
5548 .rmdir = nfs4_proc_remove,
5549 .readdir = nfs4_proc_readdir,
5550 .mknod = nfs4_proc_mknod,
5551 .statfs = nfs4_proc_statfs,
5552 .fsinfo = nfs4_proc_fsinfo,
5553 .pathconf = nfs4_proc_pathconf,
5554 .set_capabilities = nfs4_server_capabilities,
5555 .decode_dirent = nfs4_decode_dirent,
5556 .read_setup = nfs4_proc_read_setup,
5557 .read_done = nfs4_read_done,
5558 .write_setup = nfs4_proc_write_setup,
5559 .write_done = nfs4_write_done,
5560 .commit_setup = nfs4_proc_commit_setup,
5561 .commit_done = nfs4_commit_done,
5562 .lock = nfs4_proc_lock,
5563 .clear_acl_cache = nfs4_zap_acl_attr,
5564 .close_context = nfs4_close_context,
5565 .open_context = nfs4_atomic_open,
5568 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
5569 .prefix = XATTR_NAME_NFSV4_ACL,
5570 .list = nfs4_xattr_list_nfs4_acl,
5571 .get = nfs4_xattr_get_nfs4_acl,
5572 .set = nfs4_xattr_set_nfs4_acl,
5575 const struct xattr_handler *nfs4_xattr_handlers[] = {
5576 &nfs4_xattr_nfs4_acl_handler,