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/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/nfs.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs_fs.h>
49 #include <linux/nfs_page.h>
50 #include <linux/nfs_mount.h>
51 #include <linux/namei.h>
52 #include <linux/mount.h>
53 #include <linux/module.h>
54 #include <linux/nfs_idmap.h>
55 #include <linux/sunrpc/bc_xprt.h>
56 #include <linux/xattr.h>
57 #include <linux/utsname.h>
58 #include <linux/freezer.h>
61 #include "delegation.h"
68 #define NFSDBG_FACILITY NFSDBG_PROC
70 #define NFS4_POLL_RETRY_MIN (HZ/10)
71 #define NFS4_POLL_RETRY_MAX (15*HZ)
73 #define NFS4_MAX_LOOP_ON_RECOVER (10)
76 static int _nfs4_proc_open(struct nfs4_opendata *data);
77 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
78 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
79 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
80 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
81 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
82 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
83 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
84 struct nfs_fattr *fattr, struct iattr *sattr,
85 struct nfs4_state *state);
86 #ifdef CONFIG_NFS_V4_1
87 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
88 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
90 /* Prevent leaks of NFSv4 errors into userland */
91 static int nfs4_map_errors(int err)
96 case -NFS4ERR_RESOURCE:
98 case -NFS4ERR_WRONGSEC:
100 case -NFS4ERR_BADOWNER:
101 case -NFS4ERR_BADNAME:
103 case -NFS4ERR_SHARE_DENIED:
105 case -NFS4ERR_MINOR_VERS_MISMATCH:
106 return -EPROTONOSUPPORT;
107 case -NFS4ERR_ACCESS:
110 dprintk("%s could not handle NFSv4 error %d\n",
118 * This is our standard bitmap for GETATTR requests.
120 const u32 nfs4_fattr_bitmap[3] = {
122 | FATTR4_WORD0_CHANGE
125 | FATTR4_WORD0_FILEID,
127 | FATTR4_WORD1_NUMLINKS
129 | FATTR4_WORD1_OWNER_GROUP
130 | FATTR4_WORD1_RAWDEV
131 | FATTR4_WORD1_SPACE_USED
132 | FATTR4_WORD1_TIME_ACCESS
133 | FATTR4_WORD1_TIME_METADATA
134 | FATTR4_WORD1_TIME_MODIFY
137 static const u32 nfs4_pnfs_open_bitmap[3] = {
139 | FATTR4_WORD0_CHANGE
142 | FATTR4_WORD0_FILEID,
144 | FATTR4_WORD1_NUMLINKS
146 | FATTR4_WORD1_OWNER_GROUP
147 | FATTR4_WORD1_RAWDEV
148 | FATTR4_WORD1_SPACE_USED
149 | FATTR4_WORD1_TIME_ACCESS
150 | FATTR4_WORD1_TIME_METADATA
151 | FATTR4_WORD1_TIME_MODIFY,
152 FATTR4_WORD2_MDSTHRESHOLD
155 static const u32 nfs4_open_noattr_bitmap[3] = {
157 | FATTR4_WORD0_CHANGE
158 | FATTR4_WORD0_FILEID,
161 const u32 nfs4_statfs_bitmap[2] = {
162 FATTR4_WORD0_FILES_AVAIL
163 | FATTR4_WORD0_FILES_FREE
164 | FATTR4_WORD0_FILES_TOTAL,
165 FATTR4_WORD1_SPACE_AVAIL
166 | FATTR4_WORD1_SPACE_FREE
167 | FATTR4_WORD1_SPACE_TOTAL
170 const u32 nfs4_pathconf_bitmap[2] = {
172 | FATTR4_WORD0_MAXNAME,
176 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
177 | FATTR4_WORD0_MAXREAD
178 | FATTR4_WORD0_MAXWRITE
179 | FATTR4_WORD0_LEASE_TIME,
180 FATTR4_WORD1_TIME_DELTA
181 | FATTR4_WORD1_FS_LAYOUT_TYPES,
182 FATTR4_WORD2_LAYOUT_BLKSIZE
185 const u32 nfs4_fs_locations_bitmap[2] = {
187 | FATTR4_WORD0_CHANGE
190 | FATTR4_WORD0_FILEID
191 | FATTR4_WORD0_FS_LOCATIONS,
193 | FATTR4_WORD1_NUMLINKS
195 | FATTR4_WORD1_OWNER_GROUP
196 | FATTR4_WORD1_RAWDEV
197 | FATTR4_WORD1_SPACE_USED
198 | FATTR4_WORD1_TIME_ACCESS
199 | FATTR4_WORD1_TIME_METADATA
200 | FATTR4_WORD1_TIME_MODIFY
201 | FATTR4_WORD1_MOUNTED_ON_FILEID
204 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
205 struct nfs4_readdir_arg *readdir)
210 readdir->cookie = cookie;
211 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
216 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
221 * NFSv4 servers do not return entries for '.' and '..'
222 * Therefore, we fake these entries here. We let '.'
223 * have cookie 0 and '..' have cookie 1. Note that
224 * when talking to the server, we always send cookie 0
227 start = p = kmap_atomic(*readdir->pages);
230 *p++ = xdr_one; /* next */
231 *p++ = xdr_zero; /* cookie, first word */
232 *p++ = xdr_one; /* cookie, second word */
233 *p++ = xdr_one; /* entry len */
234 memcpy(p, ".\0\0\0", 4); /* entry */
236 *p++ = xdr_one; /* bitmap length */
237 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
238 *p++ = htonl(8); /* attribute buffer length */
239 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
242 *p++ = xdr_one; /* next */
243 *p++ = xdr_zero; /* cookie, first word */
244 *p++ = xdr_two; /* cookie, second word */
245 *p++ = xdr_two; /* entry len */
246 memcpy(p, "..\0\0", 4); /* entry */
248 *p++ = xdr_one; /* bitmap length */
249 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
250 *p++ = htonl(8); /* attribute buffer length */
251 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
253 readdir->pgbase = (char *)p - (char *)start;
254 readdir->count -= readdir->pgbase;
255 kunmap_atomic(start);
258 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
264 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
265 nfs_wait_bit_killable, TASK_KILLABLE);
269 if (clp->cl_cons_state < 0)
270 return clp->cl_cons_state;
274 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
281 *timeout = NFS4_POLL_RETRY_MIN;
282 if (*timeout > NFS4_POLL_RETRY_MAX)
283 *timeout = NFS4_POLL_RETRY_MAX;
284 freezable_schedule_timeout_killable(*timeout);
285 if (fatal_signal_pending(current))
291 /* This is the error handling routine for processes that are allowed
294 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
296 struct nfs_client *clp = server->nfs_client;
297 struct nfs4_state *state = exception->state;
298 struct inode *inode = exception->inode;
301 exception->retry = 0;
305 case -NFS4ERR_OPENMODE:
306 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
307 nfs4_inode_return_delegation(inode);
308 exception->retry = 1;
313 nfs4_schedule_stateid_recovery(server, state);
314 goto wait_on_recovery;
315 case -NFS4ERR_DELEG_REVOKED:
316 case -NFS4ERR_ADMIN_REVOKED:
317 case -NFS4ERR_BAD_STATEID:
320 nfs_remove_bad_delegation(state->inode);
321 nfs4_schedule_stateid_recovery(server, state);
322 goto wait_on_recovery;
323 case -NFS4ERR_EXPIRED:
325 nfs4_schedule_stateid_recovery(server, state);
326 case -NFS4ERR_STALE_STATEID:
327 case -NFS4ERR_STALE_CLIENTID:
328 nfs4_schedule_lease_recovery(clp);
329 goto wait_on_recovery;
330 #if defined(CONFIG_NFS_V4_1)
331 case -NFS4ERR_BADSESSION:
332 case -NFS4ERR_BADSLOT:
333 case -NFS4ERR_BAD_HIGH_SLOT:
334 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
335 case -NFS4ERR_DEADSESSION:
336 case -NFS4ERR_SEQ_FALSE_RETRY:
337 case -NFS4ERR_SEQ_MISORDERED:
338 dprintk("%s ERROR: %d Reset session\n", __func__,
340 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
341 goto wait_on_recovery;
342 #endif /* defined(CONFIG_NFS_V4_1) */
343 case -NFS4ERR_FILE_OPEN:
344 if (exception->timeout > HZ) {
345 /* We have retried a decent amount, time to
354 ret = nfs4_delay(server->client, &exception->timeout);
357 case -NFS4ERR_RETRY_UNCACHED_REP:
358 case -NFS4ERR_OLD_STATEID:
359 exception->retry = 1;
361 case -NFS4ERR_BADOWNER:
362 /* The following works around a Linux server bug! */
363 case -NFS4ERR_BADNAME:
364 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
365 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
366 exception->retry = 1;
367 printk(KERN_WARNING "NFS: v4 server %s "
368 "does not accept raw "
370 "Reenabling the idmapper.\n",
371 server->nfs_client->cl_hostname);
374 /* We failed to handle the error */
375 return nfs4_map_errors(ret);
377 ret = nfs4_wait_clnt_recover(clp);
379 exception->retry = 1;
384 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
386 spin_lock(&clp->cl_lock);
387 if (time_before(clp->cl_last_renewal,timestamp))
388 clp->cl_last_renewal = timestamp;
389 spin_unlock(&clp->cl_lock);
392 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
394 do_renew_lease(server->nfs_client, timestamp);
397 #if defined(CONFIG_NFS_V4_1)
400 * nfs4_shrink_slot_table - free retired slots from the slot table
402 static void nfs4_shrink_slot_table(struct nfs4_slot_table *tbl, u32 newsize)
404 struct nfs4_slot **p;
405 if (newsize >= tbl->max_slots)
412 struct nfs4_slot *slot = *p;
421 * nfs4_free_slot - free a slot and efficiently update slot table.
423 * freeing a slot is trivially done by clearing its respective bit
425 * If the freed slotid equals highest_used_slotid we want to update it
426 * so that the server would be able to size down the slot table if needed,
427 * otherwise we know that the highest_used_slotid is still in use.
428 * When updating highest_used_slotid there may be "holes" in the bitmap
429 * so we need to scan down from highest_used_slotid to 0 looking for the now
430 * highest slotid in use.
431 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
433 * Must be called while holding tbl->slot_tbl_lock
436 nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *slot)
438 u32 slotid = slot->slot_nr;
440 /* clear used bit in bitmap */
441 __clear_bit(slotid, tbl->used_slots);
443 /* update highest_used_slotid when it is freed */
444 if (slotid == tbl->highest_used_slotid) {
445 u32 new_max = find_last_bit(tbl->used_slots, slotid);
446 if (new_max < slotid)
447 tbl->highest_used_slotid = new_max;
449 tbl->highest_used_slotid = NFS4_NO_SLOT;
451 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
452 slotid, tbl->highest_used_slotid);
455 bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
457 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
462 * Signal state manager thread if session fore channel is drained
464 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
466 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
467 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
468 nfs4_set_task_privileged, NULL);
472 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
475 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
476 complete(&ses->fc_slot_table.complete);
480 * Signal state manager thread if session back channel is drained
482 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
484 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
485 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
487 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
488 complete(&ses->bc_slot_table.complete);
491 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
493 struct nfs4_session *session;
494 struct nfs4_slot_table *tbl;
497 /* just wake up the next guy waiting since
498 * we may have not consumed a slot after all */
499 dprintk("%s: No slot\n", __func__);
502 tbl = res->sr_slot->table;
503 session = tbl->session;
505 spin_lock(&tbl->slot_tbl_lock);
506 nfs4_free_slot(tbl, res->sr_slot);
507 nfs4_check_drain_fc_complete(session);
508 spin_unlock(&tbl->slot_tbl_lock);
512 /* Update the client's idea of target_highest_slotid */
513 static void nfs41_set_target_slotid_locked(struct nfs4_slot_table *tbl,
514 u32 target_highest_slotid)
516 unsigned int max_slotid, i;
518 if (tbl->target_highest_slotid == target_highest_slotid)
520 tbl->target_highest_slotid = target_highest_slotid;
523 max_slotid = min(NFS4_MAX_SLOT_TABLE - 1, tbl->target_highest_slotid);
524 for (i = tbl->max_slotid + 1; i <= max_slotid; i++)
525 rpc_wake_up_next(&tbl->slot_tbl_waitq);
526 tbl->max_slotid = max_slotid;
529 void nfs41_set_target_slotid(struct nfs4_slot_table *tbl,
530 u32 target_highest_slotid)
532 spin_lock(&tbl->slot_tbl_lock);
533 nfs41_set_target_slotid_locked(tbl, target_highest_slotid);
534 spin_unlock(&tbl->slot_tbl_lock);
537 static void nfs41_set_server_slotid_locked(struct nfs4_slot_table *tbl,
540 if (tbl->server_highest_slotid == highest_slotid)
542 if (tbl->highest_used_slotid > highest_slotid)
544 /* Deallocate slots */
545 nfs4_shrink_slot_table(tbl, highest_slotid + 1);
546 tbl->server_highest_slotid = highest_slotid;
549 static void nfs41_update_target_slotid(struct nfs4_slot_table *tbl,
550 struct nfs4_slot *slot,
551 struct nfs4_sequence_res *res)
553 spin_lock(&tbl->slot_tbl_lock);
554 if (tbl->generation != slot->generation)
556 nfs41_set_server_slotid_locked(tbl, res->sr_highest_slotid);
557 nfs41_set_target_slotid_locked(tbl, res->sr_target_highest_slotid);
559 spin_unlock(&tbl->slot_tbl_lock);
562 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
564 struct nfs4_session *session;
565 struct nfs4_slot *slot;
566 unsigned long timestamp;
567 struct nfs_client *clp;
570 * sr_status remains 1 if an RPC level error occurred. The server
571 * may or may not have processed the sequence operation..
572 * Proceed as if the server received and processed the sequence
575 if (res->sr_status == 1)
576 res->sr_status = NFS_OK;
578 /* don't increment the sequence number if the task wasn't sent */
579 if (!RPC_WAS_SENT(task))
583 session = slot->table->session;
585 /* Check the SEQUENCE operation status */
586 switch (res->sr_status) {
588 /* Update the slot's sequence and clientid lease timer */
590 timestamp = slot->renewal_time;
592 do_renew_lease(clp, timestamp);
593 /* Check sequence flags */
594 if (res->sr_status_flags != 0)
595 nfs4_schedule_lease_recovery(clp);
596 nfs41_update_target_slotid(slot->table, slot, res);
599 /* The server detected a resend of the RPC call and
600 * returned NFS4ERR_DELAY as per Section 2.10.6.2
603 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
609 /* Just update the slot sequence no. */
613 /* The session may be reset by one of the error handlers. */
614 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
615 nfs41_sequence_free_slot(res);
618 if (!rpc_restart_call(task))
620 rpc_delay(task, NFS4_POLL_RETRY_MAX);
624 static int nfs4_sequence_done(struct rpc_task *task,
625 struct nfs4_sequence_res *res)
627 if (res->sr_slot == NULL)
629 return nfs41_sequence_done(task, res);
632 static struct nfs4_slot *nfs4_new_slot(struct nfs4_slot_table *tbl,
633 u32 slotid, u32 seq_init, gfp_t gfp_mask)
635 struct nfs4_slot *slot;
637 slot = kzalloc(sizeof(*slot), gfp_mask);
640 slot->slot_nr = slotid;
641 slot->seq_nr = seq_init;
646 static struct nfs4_slot *nfs4_find_or_create_slot(struct nfs4_slot_table *tbl,
647 u32 slotid, u32 seq_init, gfp_t gfp_mask)
649 struct nfs4_slot **p, *slot;
654 *p = nfs4_new_slot(tbl, tbl->max_slots,
661 if (slot->slot_nr == slotid)
669 * nfs4_alloc_slot - efficiently look for a free slot
671 * nfs4_alloc_slot looks for an unset bit in the used_slots bitmap.
672 * If found, we mark the slot as used, update the highest_used_slotid,
673 * and respectively set up the sequence operation args.
675 * Note: must be called with under the slot_tbl_lock.
677 static struct nfs4_slot *nfs4_alloc_slot(struct nfs4_slot_table *tbl)
679 struct nfs4_slot *ret = NULL;
682 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
683 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
684 tbl->max_slotid + 1);
685 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slotid + 1);
686 if (slotid > tbl->max_slotid)
688 ret = nfs4_find_or_create_slot(tbl, slotid, 1, GFP_NOWAIT);
691 __set_bit(slotid, tbl->used_slots);
692 if (slotid > tbl->highest_used_slotid ||
693 tbl->highest_used_slotid == NFS4_NO_SLOT)
694 tbl->highest_used_slotid = slotid;
695 ret->renewal_time = jiffies;
696 ret->generation = tbl->generation;
699 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
700 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
701 ret ? ret->slot_nr : -1);
705 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
706 struct nfs4_sequence_res *res, int cache_reply)
708 args->sa_slot = NULL;
709 args->sa_cache_this = 0;
711 args->sa_cache_this = 1;
715 int nfs41_setup_sequence(struct nfs4_session *session,
716 struct nfs4_sequence_args *args,
717 struct nfs4_sequence_res *res,
718 struct rpc_task *task)
720 struct nfs4_slot *slot;
721 struct nfs4_slot_table *tbl;
723 dprintk("--> %s\n", __func__);
724 /* slot already allocated? */
725 if (res->sr_slot != NULL)
728 tbl = &session->fc_slot_table;
730 spin_lock(&tbl->slot_tbl_lock);
731 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
732 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
733 /* The state manager will wait until the slot table is empty */
734 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
735 spin_unlock(&tbl->slot_tbl_lock);
736 dprintk("%s session is draining\n", __func__);
740 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
741 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
742 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
743 spin_unlock(&tbl->slot_tbl_lock);
744 dprintk("%s enforce FIFO order\n", __func__);
748 slot = nfs4_alloc_slot(tbl);
750 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
751 spin_unlock(&tbl->slot_tbl_lock);
752 dprintk("<-- %s: no free slots\n", __func__);
755 spin_unlock(&tbl->slot_tbl_lock);
757 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
759 args->sa_slot = slot;
761 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
762 slot->slot_nr, slot->seq_nr);
765 res->sr_status_flags = 0;
767 * sr_status is only set in decode_sequence, and so will remain
768 * set to 1 if an rpc level failure occurs.
773 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
775 int nfs4_setup_sequence(const struct nfs_server *server,
776 struct nfs4_sequence_args *args,
777 struct nfs4_sequence_res *res,
778 struct rpc_task *task)
780 struct nfs4_session *session = nfs4_get_session(server);
786 dprintk("--> %s clp %p session %p sr_slot %d\n",
787 __func__, session->clp, session, res->sr_slot ?
788 res->sr_slot->slot_nr : -1);
790 ret = nfs41_setup_sequence(session, args, res, task);
792 dprintk("<-- %s status=%d\n", __func__, ret);
796 struct nfs41_call_sync_data {
797 const struct nfs_server *seq_server;
798 struct nfs4_sequence_args *seq_args;
799 struct nfs4_sequence_res *seq_res;
802 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
804 struct nfs41_call_sync_data *data = calldata;
806 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
808 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
809 data->seq_res, task))
811 rpc_call_start(task);
814 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
816 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
817 nfs41_call_sync_prepare(task, calldata);
820 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
822 struct nfs41_call_sync_data *data = calldata;
824 nfs41_sequence_done(task, data->seq_res);
827 static const struct rpc_call_ops nfs41_call_sync_ops = {
828 .rpc_call_prepare = nfs41_call_sync_prepare,
829 .rpc_call_done = nfs41_call_sync_done,
832 static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
833 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
834 .rpc_call_done = nfs41_call_sync_done,
837 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
838 struct nfs_server *server,
839 struct rpc_message *msg,
840 struct nfs4_sequence_args *args,
841 struct nfs4_sequence_res *res,
845 struct rpc_task *task;
846 struct nfs41_call_sync_data data = {
847 .seq_server = server,
851 struct rpc_task_setup task_setup = {
854 .callback_ops = &nfs41_call_sync_ops,
855 .callback_data = &data
859 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
860 task = rpc_run_task(&task_setup);
864 ret = task->tk_status;
870 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
871 struct nfs_server *server,
872 struct rpc_message *msg,
873 struct nfs4_sequence_args *args,
874 struct nfs4_sequence_res *res,
877 nfs41_init_sequence(args, res, cache_reply);
878 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
883 void nfs41_init_sequence(struct nfs4_sequence_args *args,
884 struct nfs4_sequence_res *res, int cache_reply)
888 static int nfs4_sequence_done(struct rpc_task *task,
889 struct nfs4_sequence_res *res)
893 #endif /* CONFIG_NFS_V4_1 */
895 int _nfs4_call_sync(struct rpc_clnt *clnt,
896 struct nfs_server *server,
897 struct rpc_message *msg,
898 struct nfs4_sequence_args *args,
899 struct nfs4_sequence_res *res,
902 nfs41_init_sequence(args, res, cache_reply);
903 return rpc_call_sync(clnt, msg, 0);
907 int nfs4_call_sync(struct rpc_clnt *clnt,
908 struct nfs_server *server,
909 struct rpc_message *msg,
910 struct nfs4_sequence_args *args,
911 struct nfs4_sequence_res *res,
914 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
915 args, res, cache_reply);
918 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
920 struct nfs_inode *nfsi = NFS_I(dir);
922 spin_lock(&dir->i_lock);
923 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
924 if (!cinfo->atomic || cinfo->before != dir->i_version)
925 nfs_force_lookup_revalidate(dir);
926 dir->i_version = cinfo->after;
927 spin_unlock(&dir->i_lock);
930 struct nfs4_opendata {
932 struct nfs_openargs o_arg;
933 struct nfs_openres o_res;
934 struct nfs_open_confirmargs c_arg;
935 struct nfs_open_confirmres c_res;
936 struct nfs4_string owner_name;
937 struct nfs4_string group_name;
938 struct nfs_fattr f_attr;
940 struct dentry *dentry;
941 struct nfs4_state_owner *owner;
942 struct nfs4_state *state;
944 unsigned long timestamp;
945 unsigned int rpc_done : 1;
951 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
953 p->o_res.f_attr = &p->f_attr;
954 p->o_res.seqid = p->o_arg.seqid;
955 p->c_res.seqid = p->c_arg.seqid;
956 p->o_res.server = p->o_arg.server;
957 p->o_res.access_request = p->o_arg.access;
958 nfs_fattr_init(&p->f_attr);
959 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
962 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
963 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
964 const struct iattr *attrs,
967 struct dentry *parent = dget_parent(dentry);
968 struct inode *dir = parent->d_inode;
969 struct nfs_server *server = NFS_SERVER(dir);
970 struct nfs4_opendata *p;
972 p = kzalloc(sizeof(*p), gfp_mask);
975 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
976 if (p->o_arg.seqid == NULL)
978 nfs_sb_active(dentry->d_sb);
979 p->dentry = dget(dentry);
982 atomic_inc(&sp->so_count);
983 p->o_arg.fh = NFS_FH(dir);
984 p->o_arg.open_flags = flags;
985 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
986 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
987 * will return permission denied for all bits until close */
988 if (!(flags & O_EXCL)) {
989 /* ask server to check for all possible rights as results
991 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
992 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
994 p->o_arg.clientid = server->nfs_client->cl_clientid;
995 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
996 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
997 p->o_arg.name = &dentry->d_name;
998 p->o_arg.server = server;
999 p->o_arg.bitmask = server->attr_bitmask;
1000 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1001 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
1002 if (attrs != NULL && attrs->ia_valid != 0) {
1005 p->o_arg.u.attrs = &p->attrs;
1006 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1009 verf[1] = current->pid;
1010 memcpy(p->o_arg.u.verifier.data, verf,
1011 sizeof(p->o_arg.u.verifier.data));
1013 p->c_arg.fh = &p->o_res.fh;
1014 p->c_arg.stateid = &p->o_res.stateid;
1015 p->c_arg.seqid = p->o_arg.seqid;
1016 nfs4_init_opendata_res(p);
1017 kref_init(&p->kref);
1026 static void nfs4_opendata_free(struct kref *kref)
1028 struct nfs4_opendata *p = container_of(kref,
1029 struct nfs4_opendata, kref);
1030 struct super_block *sb = p->dentry->d_sb;
1032 nfs_free_seqid(p->o_arg.seqid);
1033 if (p->state != NULL)
1034 nfs4_put_open_state(p->state);
1035 nfs4_put_state_owner(p->owner);
1038 nfs_sb_deactive(sb);
1039 nfs_fattr_free_names(&p->f_attr);
1043 static void nfs4_opendata_put(struct nfs4_opendata *p)
1046 kref_put(&p->kref, nfs4_opendata_free);
1049 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1053 ret = rpc_wait_for_completion_task(task);
1057 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1061 if (open_mode & (O_EXCL|O_TRUNC))
1063 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1065 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1066 && state->n_rdonly != 0;
1069 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1070 && state->n_wronly != 0;
1072 case FMODE_READ|FMODE_WRITE:
1073 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1074 && state->n_rdwr != 0;
1080 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
1082 if (delegation == NULL)
1084 if ((delegation->type & fmode) != fmode)
1086 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1088 nfs_mark_delegation_referenced(delegation);
1092 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1101 case FMODE_READ|FMODE_WRITE:
1104 nfs4_state_set_mode_locked(state, state->state | fmode);
1107 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1109 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1110 nfs4_stateid_copy(&state->stateid, stateid);
1111 nfs4_stateid_copy(&state->open_stateid, stateid);
1114 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1117 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1119 case FMODE_READ|FMODE_WRITE:
1120 set_bit(NFS_O_RDWR_STATE, &state->flags);
1124 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1126 write_seqlock(&state->seqlock);
1127 nfs_set_open_stateid_locked(state, stateid, fmode);
1128 write_sequnlock(&state->seqlock);
1131 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1134 * Protect the call to nfs4_state_set_mode_locked and
1135 * serialise the stateid update
1137 write_seqlock(&state->seqlock);
1138 if (deleg_stateid != NULL) {
1139 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1140 set_bit(NFS_DELEGATED_STATE, &state->flags);
1142 if (open_stateid != NULL)
1143 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1144 write_sequnlock(&state->seqlock);
1145 spin_lock(&state->owner->so_lock);
1146 update_open_stateflags(state, fmode);
1147 spin_unlock(&state->owner->so_lock);
1150 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1152 struct nfs_inode *nfsi = NFS_I(state->inode);
1153 struct nfs_delegation *deleg_cur;
1156 fmode &= (FMODE_READ|FMODE_WRITE);
1159 deleg_cur = rcu_dereference(nfsi->delegation);
1160 if (deleg_cur == NULL)
1163 spin_lock(&deleg_cur->lock);
1164 if (nfsi->delegation != deleg_cur ||
1165 (deleg_cur->type & fmode) != fmode)
1166 goto no_delegation_unlock;
1168 if (delegation == NULL)
1169 delegation = &deleg_cur->stateid;
1170 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1171 goto no_delegation_unlock;
1173 nfs_mark_delegation_referenced(deleg_cur);
1174 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1176 no_delegation_unlock:
1177 spin_unlock(&deleg_cur->lock);
1181 if (!ret && open_stateid != NULL) {
1182 __update_open_stateid(state, open_stateid, NULL, fmode);
1190 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1192 struct nfs_delegation *delegation;
1195 delegation = rcu_dereference(NFS_I(inode)->delegation);
1196 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1201 nfs4_inode_return_delegation(inode);
1204 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1206 struct nfs4_state *state = opendata->state;
1207 struct nfs_inode *nfsi = NFS_I(state->inode);
1208 struct nfs_delegation *delegation;
1209 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1210 fmode_t fmode = opendata->o_arg.fmode;
1211 nfs4_stateid stateid;
1215 if (can_open_cached(state, fmode, open_mode)) {
1216 spin_lock(&state->owner->so_lock);
1217 if (can_open_cached(state, fmode, open_mode)) {
1218 update_open_stateflags(state, fmode);
1219 spin_unlock(&state->owner->so_lock);
1220 goto out_return_state;
1222 spin_unlock(&state->owner->so_lock);
1225 delegation = rcu_dereference(nfsi->delegation);
1226 if (!can_open_delegated(delegation, fmode)) {
1230 /* Save the delegation */
1231 nfs4_stateid_copy(&stateid, &delegation->stateid);
1233 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1238 /* Try to update the stateid using the delegation */
1239 if (update_open_stateid(state, NULL, &stateid, fmode))
1240 goto out_return_state;
1243 return ERR_PTR(ret);
1245 atomic_inc(&state->count);
1250 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1252 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1253 struct nfs_delegation *delegation;
1254 int delegation_flags = 0;
1257 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1259 delegation_flags = delegation->flags;
1261 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1262 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1263 "returning a delegation for "
1264 "OPEN(CLAIM_DELEGATE_CUR)\n",
1266 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1267 nfs_inode_set_delegation(state->inode,
1268 data->owner->so_cred,
1271 nfs_inode_reclaim_delegation(state->inode,
1272 data->owner->so_cred,
1277 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1278 * and update the nfs4_state.
1280 static struct nfs4_state *
1281 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1283 struct inode *inode = data->state->inode;
1284 struct nfs4_state *state = data->state;
1287 if (!data->rpc_done) {
1288 ret = data->rpc_status;
1293 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1294 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1295 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1299 state = nfs4_get_open_state(inode, data->owner);
1303 ret = nfs_refresh_inode(inode, &data->f_attr);
1307 if (data->o_res.delegation_type != 0)
1308 nfs4_opendata_check_deleg(data, state);
1309 update_open_stateid(state, &data->o_res.stateid, NULL,
1314 return ERR_PTR(ret);
1318 static struct nfs4_state *
1319 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1321 struct inode *inode;
1322 struct nfs4_state *state = NULL;
1325 if (!data->rpc_done) {
1326 state = nfs4_try_open_cached(data);
1331 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1333 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1334 ret = PTR_ERR(inode);
1338 state = nfs4_get_open_state(inode, data->owner);
1341 if (data->o_res.delegation_type != 0)
1342 nfs4_opendata_check_deleg(data, state);
1343 update_open_stateid(state, &data->o_res.stateid, NULL,
1351 return ERR_PTR(ret);
1354 static struct nfs4_state *
1355 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1357 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1358 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1359 return _nfs4_opendata_to_nfs4_state(data);
1362 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1364 struct nfs_inode *nfsi = NFS_I(state->inode);
1365 struct nfs_open_context *ctx;
1367 spin_lock(&state->inode->i_lock);
1368 list_for_each_entry(ctx, &nfsi->open_files, list) {
1369 if (ctx->state != state)
1371 get_nfs_open_context(ctx);
1372 spin_unlock(&state->inode->i_lock);
1375 spin_unlock(&state->inode->i_lock);
1376 return ERR_PTR(-ENOENT);
1379 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1381 struct nfs4_opendata *opendata;
1383 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1384 if (opendata == NULL)
1385 return ERR_PTR(-ENOMEM);
1386 opendata->state = state;
1387 atomic_inc(&state->count);
1391 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1393 struct nfs4_state *newstate;
1396 opendata->o_arg.open_flags = 0;
1397 opendata->o_arg.fmode = fmode;
1398 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1399 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1400 nfs4_init_opendata_res(opendata);
1401 ret = _nfs4_recover_proc_open(opendata);
1404 newstate = nfs4_opendata_to_nfs4_state(opendata);
1405 if (IS_ERR(newstate))
1406 return PTR_ERR(newstate);
1407 nfs4_close_state(newstate, fmode);
1412 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1414 struct nfs4_state *newstate;
1417 /* memory barrier prior to reading state->n_* */
1418 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1420 if (state->n_rdwr != 0) {
1421 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1422 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1425 if (newstate != state)
1428 if (state->n_wronly != 0) {
1429 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1430 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1433 if (newstate != state)
1436 if (state->n_rdonly != 0) {
1437 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1438 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1441 if (newstate != state)
1445 * We may have performed cached opens for all three recoveries.
1446 * Check if we need to update the current stateid.
1448 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1449 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1450 write_seqlock(&state->seqlock);
1451 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1452 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1453 write_sequnlock(&state->seqlock);
1460 * reclaim state on the server after a reboot.
1462 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1464 struct nfs_delegation *delegation;
1465 struct nfs4_opendata *opendata;
1466 fmode_t delegation_type = 0;
1469 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1470 if (IS_ERR(opendata))
1471 return PTR_ERR(opendata);
1472 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1473 opendata->o_arg.fh = NFS_FH(state->inode);
1475 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1476 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1477 delegation_type = delegation->type;
1479 opendata->o_arg.u.delegation_type = delegation_type;
1480 status = nfs4_open_recover(opendata, state);
1481 nfs4_opendata_put(opendata);
1485 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1487 struct nfs_server *server = NFS_SERVER(state->inode);
1488 struct nfs4_exception exception = { };
1491 err = _nfs4_do_open_reclaim(ctx, state);
1492 if (err != -NFS4ERR_DELAY)
1494 nfs4_handle_exception(server, err, &exception);
1495 } while (exception.retry);
1499 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1501 struct nfs_open_context *ctx;
1504 ctx = nfs4_state_find_open_context(state);
1506 return PTR_ERR(ctx);
1507 ret = nfs4_do_open_reclaim(ctx, state);
1508 put_nfs_open_context(ctx);
1512 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1514 struct nfs4_opendata *opendata;
1517 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1518 if (IS_ERR(opendata))
1519 return PTR_ERR(opendata);
1520 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1521 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1522 ret = nfs4_open_recover(opendata, state);
1523 nfs4_opendata_put(opendata);
1527 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1529 struct nfs4_exception exception = { };
1530 struct nfs_server *server = NFS_SERVER(state->inode);
1533 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1539 case -NFS4ERR_BADSESSION:
1540 case -NFS4ERR_BADSLOT:
1541 case -NFS4ERR_BAD_HIGH_SLOT:
1542 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1543 case -NFS4ERR_DEADSESSION:
1544 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1546 case -NFS4ERR_STALE_CLIENTID:
1547 case -NFS4ERR_STALE_STATEID:
1548 case -NFS4ERR_EXPIRED:
1549 /* Don't recall a delegation if it was lost */
1550 nfs4_schedule_lease_recovery(server->nfs_client);
1554 * The show must go on: exit, but mark the
1555 * stateid as needing recovery.
1557 case -NFS4ERR_DELEG_REVOKED:
1558 case -NFS4ERR_ADMIN_REVOKED:
1559 case -NFS4ERR_BAD_STATEID:
1560 nfs_inode_find_state_and_recover(state->inode,
1562 nfs4_schedule_stateid_recovery(server, state);
1565 * User RPCSEC_GSS context has expired.
1566 * We cannot recover this stateid now, so
1567 * skip it and allow recovery thread to
1574 err = nfs4_handle_exception(server, err, &exception);
1575 } while (exception.retry);
1580 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1582 struct nfs4_opendata *data = calldata;
1584 data->rpc_status = task->tk_status;
1585 if (data->rpc_status == 0) {
1586 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1587 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1588 renew_lease(data->o_res.server, data->timestamp);
1593 static void nfs4_open_confirm_release(void *calldata)
1595 struct nfs4_opendata *data = calldata;
1596 struct nfs4_state *state = NULL;
1598 /* If this request hasn't been cancelled, do nothing */
1599 if (data->cancelled == 0)
1601 /* In case of error, no cleanup! */
1602 if (!data->rpc_done)
1604 state = nfs4_opendata_to_nfs4_state(data);
1606 nfs4_close_state(state, data->o_arg.fmode);
1608 nfs4_opendata_put(data);
1611 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1612 .rpc_call_done = nfs4_open_confirm_done,
1613 .rpc_release = nfs4_open_confirm_release,
1617 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1619 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1621 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1622 struct rpc_task *task;
1623 struct rpc_message msg = {
1624 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1625 .rpc_argp = &data->c_arg,
1626 .rpc_resp = &data->c_res,
1627 .rpc_cred = data->owner->so_cred,
1629 struct rpc_task_setup task_setup_data = {
1630 .rpc_client = server->client,
1631 .rpc_message = &msg,
1632 .callback_ops = &nfs4_open_confirm_ops,
1633 .callback_data = data,
1634 .workqueue = nfsiod_workqueue,
1635 .flags = RPC_TASK_ASYNC,
1639 kref_get(&data->kref);
1641 data->rpc_status = 0;
1642 data->timestamp = jiffies;
1643 task = rpc_run_task(&task_setup_data);
1645 return PTR_ERR(task);
1646 status = nfs4_wait_for_completion_rpc_task(task);
1648 data->cancelled = 1;
1651 status = data->rpc_status;
1656 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1658 struct nfs4_opendata *data = calldata;
1659 struct nfs4_state_owner *sp = data->owner;
1661 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1664 * Check if we still need to send an OPEN call, or if we can use
1665 * a delegation instead.
1667 if (data->state != NULL) {
1668 struct nfs_delegation *delegation;
1670 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1673 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1674 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1675 can_open_delegated(delegation, data->o_arg.fmode))
1676 goto unlock_no_action;
1679 /* Update client id. */
1680 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1681 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1682 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1683 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1684 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1686 data->timestamp = jiffies;
1687 if (nfs4_setup_sequence(data->o_arg.server,
1688 &data->o_arg.seq_args,
1689 &data->o_res.seq_res,
1691 nfs_release_seqid(data->o_arg.seqid);
1693 rpc_call_start(task);
1698 task->tk_action = NULL;
1702 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1704 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1705 nfs4_open_prepare(task, calldata);
1708 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1710 struct nfs4_opendata *data = calldata;
1712 data->rpc_status = task->tk_status;
1714 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1717 if (task->tk_status == 0) {
1718 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1719 switch (data->o_res.f_attr->mode & S_IFMT) {
1723 data->rpc_status = -ELOOP;
1726 data->rpc_status = -EISDIR;
1729 data->rpc_status = -ENOTDIR;
1732 renew_lease(data->o_res.server, data->timestamp);
1733 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1734 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1739 static void nfs4_open_release(void *calldata)
1741 struct nfs4_opendata *data = calldata;
1742 struct nfs4_state *state = NULL;
1744 /* If this request hasn't been cancelled, do nothing */
1745 if (data->cancelled == 0)
1747 /* In case of error, no cleanup! */
1748 if (data->rpc_status != 0 || !data->rpc_done)
1750 /* In case we need an open_confirm, no cleanup! */
1751 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1753 state = nfs4_opendata_to_nfs4_state(data);
1755 nfs4_close_state(state, data->o_arg.fmode);
1757 nfs4_opendata_put(data);
1760 static const struct rpc_call_ops nfs4_open_ops = {
1761 .rpc_call_prepare = nfs4_open_prepare,
1762 .rpc_call_done = nfs4_open_done,
1763 .rpc_release = nfs4_open_release,
1766 static const struct rpc_call_ops nfs4_recover_open_ops = {
1767 .rpc_call_prepare = nfs4_recover_open_prepare,
1768 .rpc_call_done = nfs4_open_done,
1769 .rpc_release = nfs4_open_release,
1772 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1774 struct inode *dir = data->dir->d_inode;
1775 struct nfs_server *server = NFS_SERVER(dir);
1776 struct nfs_openargs *o_arg = &data->o_arg;
1777 struct nfs_openres *o_res = &data->o_res;
1778 struct rpc_task *task;
1779 struct rpc_message msg = {
1780 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1783 .rpc_cred = data->owner->so_cred,
1785 struct rpc_task_setup task_setup_data = {
1786 .rpc_client = server->client,
1787 .rpc_message = &msg,
1788 .callback_ops = &nfs4_open_ops,
1789 .callback_data = data,
1790 .workqueue = nfsiod_workqueue,
1791 .flags = RPC_TASK_ASYNC,
1795 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1796 kref_get(&data->kref);
1798 data->rpc_status = 0;
1799 data->cancelled = 0;
1801 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1802 task = rpc_run_task(&task_setup_data);
1804 return PTR_ERR(task);
1805 status = nfs4_wait_for_completion_rpc_task(task);
1807 data->cancelled = 1;
1810 status = data->rpc_status;
1816 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1818 struct inode *dir = data->dir->d_inode;
1819 struct nfs_openres *o_res = &data->o_res;
1822 status = nfs4_run_open_task(data, 1);
1823 if (status != 0 || !data->rpc_done)
1826 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1828 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1829 status = _nfs4_proc_open_confirm(data);
1837 static int nfs4_opendata_access(struct rpc_cred *cred,
1838 struct nfs4_opendata *opendata,
1839 struct nfs4_state *state, fmode_t fmode)
1841 struct nfs_access_entry cache;
1844 /* access call failed or for some reason the server doesn't
1845 * support any access modes -- defer access call until later */
1846 if (opendata->o_res.access_supported == 0)
1850 /* don't check MAY_WRITE - a newly created file may not have
1851 * write mode bits, but POSIX allows the creating process to write */
1852 if (fmode & FMODE_READ)
1854 if (fmode & FMODE_EXEC)
1858 cache.jiffies = jiffies;
1859 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1860 nfs_access_add_cache(state->inode, &cache);
1862 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1865 /* even though OPEN succeeded, access is denied. Close the file */
1866 nfs4_close_state(state, fmode);
1871 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1873 static int _nfs4_proc_open(struct nfs4_opendata *data)
1875 struct inode *dir = data->dir->d_inode;
1876 struct nfs_server *server = NFS_SERVER(dir);
1877 struct nfs_openargs *o_arg = &data->o_arg;
1878 struct nfs_openres *o_res = &data->o_res;
1881 status = nfs4_run_open_task(data, 0);
1882 if (!data->rpc_done)
1885 if (status == -NFS4ERR_BADNAME &&
1886 !(o_arg->open_flags & O_CREAT))
1891 nfs_fattr_map_and_free_names(server, &data->f_attr);
1893 if (o_arg->open_flags & O_CREAT)
1894 update_changeattr(dir, &o_res->cinfo);
1895 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1896 server->caps &= ~NFS_CAP_POSIX_LOCK;
1897 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1898 status = _nfs4_proc_open_confirm(data);
1902 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1903 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1907 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1912 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1913 ret = nfs4_wait_clnt_recover(clp);
1916 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1917 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1919 nfs4_schedule_state_manager(clp);
1925 static int nfs4_recover_expired_lease(struct nfs_server *server)
1927 return nfs4_client_recover_expired_lease(server->nfs_client);
1932 * reclaim state on the server after a network partition.
1933 * Assumes caller holds the appropriate lock
1935 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1937 struct nfs4_opendata *opendata;
1940 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1941 if (IS_ERR(opendata))
1942 return PTR_ERR(opendata);
1943 ret = nfs4_open_recover(opendata, state);
1945 d_drop(ctx->dentry);
1946 nfs4_opendata_put(opendata);
1950 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1952 struct nfs_server *server = NFS_SERVER(state->inode);
1953 struct nfs4_exception exception = { };
1957 err = _nfs4_open_expired(ctx, state);
1961 case -NFS4ERR_GRACE:
1962 case -NFS4ERR_DELAY:
1963 nfs4_handle_exception(server, err, &exception);
1966 } while (exception.retry);
1971 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1973 struct nfs_open_context *ctx;
1976 ctx = nfs4_state_find_open_context(state);
1978 return PTR_ERR(ctx);
1979 ret = nfs4_do_open_expired(ctx, state);
1980 put_nfs_open_context(ctx);
1984 #if defined(CONFIG_NFS_V4_1)
1985 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1987 struct nfs_server *server = NFS_SERVER(state->inode);
1988 nfs4_stateid *stateid = &state->stateid;
1991 /* If a state reset has been done, test_stateid is unneeded */
1992 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1995 status = nfs41_test_stateid(server, stateid);
1996 if (status != NFS_OK) {
1997 /* Free the stateid unless the server explicitly
1998 * informs us the stateid is unrecognized. */
1999 if (status != -NFS4ERR_BAD_STATEID)
2000 nfs41_free_stateid(server, stateid);
2001 nfs_remove_bad_delegation(state->inode);
2003 write_seqlock(&state->seqlock);
2004 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2005 write_sequnlock(&state->seqlock);
2006 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2011 * nfs41_check_open_stateid - possibly free an open stateid
2013 * @state: NFSv4 state for an inode
2015 * Returns NFS_OK if recovery for this stateid is now finished.
2016 * Otherwise a negative NFS4ERR value is returned.
2018 static int nfs41_check_open_stateid(struct nfs4_state *state)
2020 struct nfs_server *server = NFS_SERVER(state->inode);
2021 nfs4_stateid *stateid = &state->open_stateid;
2024 /* If a state reset has been done, test_stateid is unneeded */
2025 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2026 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2027 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2028 return -NFS4ERR_BAD_STATEID;
2030 status = nfs41_test_stateid(server, stateid);
2031 if (status != NFS_OK) {
2032 /* Free the stateid unless the server explicitly
2033 * informs us the stateid is unrecognized. */
2034 if (status != -NFS4ERR_BAD_STATEID)
2035 nfs41_free_stateid(server, stateid);
2037 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2038 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2039 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2044 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2048 nfs41_clear_delegation_stateid(state);
2049 status = nfs41_check_open_stateid(state);
2050 if (status != NFS_OK)
2051 status = nfs4_open_expired(sp, state);
2057 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2058 * fields corresponding to attributes that were used to store the verifier.
2059 * Make sure we clobber those fields in the later setattr call
2061 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2063 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2064 !(sattr->ia_valid & ATTR_ATIME_SET))
2065 sattr->ia_valid |= ATTR_ATIME;
2067 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2068 !(sattr->ia_valid & ATTR_MTIME_SET))
2069 sattr->ia_valid |= ATTR_MTIME;
2073 * Returns a referenced nfs4_state
2075 static int _nfs4_do_open(struct inode *dir,
2076 struct dentry *dentry,
2079 struct iattr *sattr,
2080 struct rpc_cred *cred,
2081 struct nfs4_state **res,
2082 struct nfs4_threshold **ctx_th)
2084 struct nfs4_state_owner *sp;
2085 struct nfs4_state *state = NULL;
2086 struct nfs_server *server = NFS_SERVER(dir);
2087 struct nfs4_opendata *opendata;
2090 /* Protect against reboot recovery conflicts */
2092 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2094 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2097 status = nfs4_recover_expired_lease(server);
2099 goto err_put_state_owner;
2100 if (dentry->d_inode != NULL)
2101 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
2103 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
2104 if (opendata == NULL)
2105 goto err_put_state_owner;
2107 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2108 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2109 if (!opendata->f_attr.mdsthreshold)
2110 goto err_opendata_put;
2111 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2113 if (dentry->d_inode != NULL)
2114 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2116 status = _nfs4_proc_open(opendata);
2118 goto err_opendata_put;
2120 state = nfs4_opendata_to_nfs4_state(opendata);
2121 status = PTR_ERR(state);
2123 goto err_opendata_put;
2124 if (server->caps & NFS_CAP_POSIX_LOCK)
2125 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2127 status = nfs4_opendata_access(cred, opendata, state, fmode);
2129 goto err_opendata_put;
2131 if (opendata->o_arg.open_flags & O_EXCL) {
2132 nfs4_exclusive_attrset(opendata, sattr);
2134 nfs_fattr_init(opendata->o_res.f_attr);
2135 status = nfs4_do_setattr(state->inode, cred,
2136 opendata->o_res.f_attr, sattr,
2139 nfs_setattr_update_inode(state->inode, sattr);
2140 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2143 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2144 *ctx_th = opendata->f_attr.mdsthreshold;
2146 kfree(opendata->f_attr.mdsthreshold);
2147 opendata->f_attr.mdsthreshold = NULL;
2149 nfs4_opendata_put(opendata);
2150 nfs4_put_state_owner(sp);
2154 kfree(opendata->f_attr.mdsthreshold);
2155 nfs4_opendata_put(opendata);
2156 err_put_state_owner:
2157 nfs4_put_state_owner(sp);
2164 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2165 struct dentry *dentry,
2168 struct iattr *sattr,
2169 struct rpc_cred *cred,
2170 struct nfs4_threshold **ctx_th)
2172 struct nfs4_exception exception = { };
2173 struct nfs4_state *res;
2176 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
2178 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2182 /* NOTE: BAD_SEQID means the server and client disagree about the
2183 * book-keeping w.r.t. state-changing operations
2184 * (OPEN/CLOSE/LOCK/LOCKU...)
2185 * It is actually a sign of a bug on the client or on the server.
2187 * If we receive a BAD_SEQID error in the particular case of
2188 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2189 * have unhashed the old state_owner for us, and that we can
2190 * therefore safely retry using a new one. We should still warn
2191 * the user though...
2193 if (status == -NFS4ERR_BAD_SEQID) {
2194 pr_warn_ratelimited("NFS: v4 server %s "
2195 " returned a bad sequence-id error!\n",
2196 NFS_SERVER(dir)->nfs_client->cl_hostname);
2197 exception.retry = 1;
2201 * BAD_STATEID on OPEN means that the server cancelled our
2202 * state before it received the OPEN_CONFIRM.
2203 * Recover by retrying the request as per the discussion
2204 * on Page 181 of RFC3530.
2206 if (status == -NFS4ERR_BAD_STATEID) {
2207 exception.retry = 1;
2210 if (status == -EAGAIN) {
2211 /* We must have found a delegation */
2212 exception.retry = 1;
2215 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2216 status, &exception));
2217 } while (exception.retry);
2221 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2222 struct nfs_fattr *fattr, struct iattr *sattr,
2223 struct nfs4_state *state)
2225 struct nfs_server *server = NFS_SERVER(inode);
2226 struct nfs_setattrargs arg = {
2227 .fh = NFS_FH(inode),
2230 .bitmask = server->attr_bitmask,
2232 struct nfs_setattrres res = {
2236 struct rpc_message msg = {
2237 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2242 unsigned long timestamp = jiffies;
2245 nfs_fattr_init(fattr);
2247 if (state != NULL) {
2248 struct nfs_lockowner lockowner = {
2249 .l_owner = current->files,
2250 .l_pid = current->tgid,
2252 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2254 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2256 /* Use that stateid */
2258 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2260 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2261 if (status == 0 && state != NULL)
2262 renew_lease(server, timestamp);
2266 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2267 struct nfs_fattr *fattr, struct iattr *sattr,
2268 struct nfs4_state *state)
2270 struct nfs_server *server = NFS_SERVER(inode);
2271 struct nfs4_exception exception = {
2277 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2279 case -NFS4ERR_OPENMODE:
2280 if (state && !(state->state & FMODE_WRITE)) {
2282 if (sattr->ia_valid & ATTR_OPEN)
2287 err = nfs4_handle_exception(server, err, &exception);
2288 } while (exception.retry);
2293 struct nfs4_closedata {
2294 struct inode *inode;
2295 struct nfs4_state *state;
2296 struct nfs_closeargs arg;
2297 struct nfs_closeres res;
2298 struct nfs_fattr fattr;
2299 unsigned long timestamp;
2304 static void nfs4_free_closedata(void *data)
2306 struct nfs4_closedata *calldata = data;
2307 struct nfs4_state_owner *sp = calldata->state->owner;
2308 struct super_block *sb = calldata->state->inode->i_sb;
2311 pnfs_roc_release(calldata->state->inode);
2312 nfs4_put_open_state(calldata->state);
2313 nfs_free_seqid(calldata->arg.seqid);
2314 nfs4_put_state_owner(sp);
2315 nfs_sb_deactive_async(sb);
2319 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2322 spin_lock(&state->owner->so_lock);
2323 if (!(fmode & FMODE_READ))
2324 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2325 if (!(fmode & FMODE_WRITE))
2326 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2327 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2328 spin_unlock(&state->owner->so_lock);
2331 static void nfs4_close_done(struct rpc_task *task, void *data)
2333 struct nfs4_closedata *calldata = data;
2334 struct nfs4_state *state = calldata->state;
2335 struct nfs_server *server = NFS_SERVER(calldata->inode);
2337 dprintk("%s: begin!\n", __func__);
2338 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2340 /* hmm. we are done with the inode, and in the process of freeing
2341 * the state_owner. we keep this around to process errors
2343 switch (task->tk_status) {
2346 pnfs_roc_set_barrier(state->inode,
2347 calldata->roc_barrier);
2348 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2349 renew_lease(server, calldata->timestamp);
2350 nfs4_close_clear_stateid_flags(state,
2351 calldata->arg.fmode);
2353 case -NFS4ERR_STALE_STATEID:
2354 case -NFS4ERR_OLD_STATEID:
2355 case -NFS4ERR_BAD_STATEID:
2356 case -NFS4ERR_EXPIRED:
2357 if (calldata->arg.fmode == 0)
2360 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2361 rpc_restart_call_prepare(task);
2363 nfs_release_seqid(calldata->arg.seqid);
2364 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2365 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2368 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2370 struct nfs4_closedata *calldata = data;
2371 struct nfs4_state *state = calldata->state;
2372 struct inode *inode = calldata->inode;
2375 dprintk("%s: begin!\n", __func__);
2376 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2379 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2380 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2381 spin_lock(&state->owner->so_lock);
2382 /* Calculate the change in open mode */
2383 if (state->n_rdwr == 0) {
2384 if (state->n_rdonly == 0) {
2385 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2386 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2387 calldata->arg.fmode &= ~FMODE_READ;
2389 if (state->n_wronly == 0) {
2390 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2391 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2392 calldata->arg.fmode &= ~FMODE_WRITE;
2395 spin_unlock(&state->owner->so_lock);
2398 /* Note: exit _without_ calling nfs4_close_done */
2399 task->tk_action = NULL;
2403 if (calldata->arg.fmode == 0) {
2404 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2405 if (calldata->roc &&
2406 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
2410 nfs_fattr_init(calldata->res.fattr);
2411 calldata->timestamp = jiffies;
2412 if (nfs4_setup_sequence(NFS_SERVER(inode),
2413 &calldata->arg.seq_args,
2414 &calldata->res.seq_res,
2416 nfs_release_seqid(calldata->arg.seqid);
2418 rpc_call_start(task);
2420 dprintk("%s: done!\n", __func__);
2423 static const struct rpc_call_ops nfs4_close_ops = {
2424 .rpc_call_prepare = nfs4_close_prepare,
2425 .rpc_call_done = nfs4_close_done,
2426 .rpc_release = nfs4_free_closedata,
2430 * It is possible for data to be read/written from a mem-mapped file
2431 * after the sys_close call (which hits the vfs layer as a flush).
2432 * This means that we can't safely call nfsv4 close on a file until
2433 * the inode is cleared. This in turn means that we are not good
2434 * NFSv4 citizens - we do not indicate to the server to update the file's
2435 * share state even when we are done with one of the three share
2436 * stateid's in the inode.
2438 * NOTE: Caller must be holding the sp->so_owner semaphore!
2440 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2442 struct nfs_server *server = NFS_SERVER(state->inode);
2443 struct nfs4_closedata *calldata;
2444 struct nfs4_state_owner *sp = state->owner;
2445 struct rpc_task *task;
2446 struct rpc_message msg = {
2447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2448 .rpc_cred = state->owner->so_cred,
2450 struct rpc_task_setup task_setup_data = {
2451 .rpc_client = server->client,
2452 .rpc_message = &msg,
2453 .callback_ops = &nfs4_close_ops,
2454 .workqueue = nfsiod_workqueue,
2455 .flags = RPC_TASK_ASYNC,
2457 int status = -ENOMEM;
2459 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2460 if (calldata == NULL)
2462 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2463 calldata->inode = state->inode;
2464 calldata->state = state;
2465 calldata->arg.fh = NFS_FH(state->inode);
2466 calldata->arg.stateid = &state->open_stateid;
2467 /* Serialization for the sequence id */
2468 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2469 if (calldata->arg.seqid == NULL)
2470 goto out_free_calldata;
2471 calldata->arg.fmode = 0;
2472 calldata->arg.bitmask = server->cache_consistency_bitmask;
2473 calldata->res.fattr = &calldata->fattr;
2474 calldata->res.seqid = calldata->arg.seqid;
2475 calldata->res.server = server;
2476 calldata->roc = pnfs_roc(state->inode);
2477 nfs_sb_active(calldata->inode->i_sb);
2479 msg.rpc_argp = &calldata->arg;
2480 msg.rpc_resp = &calldata->res;
2481 task_setup_data.callback_data = calldata;
2482 task = rpc_run_task(&task_setup_data);
2484 return PTR_ERR(task);
2487 status = rpc_wait_for_completion_task(task);
2493 nfs4_put_open_state(state);
2494 nfs4_put_state_owner(sp);
2498 static struct inode *
2499 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2501 struct nfs4_state *state;
2503 /* Protect against concurrent sillydeletes */
2504 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2505 ctx->cred, &ctx->mdsthreshold);
2507 return ERR_CAST(state);
2509 return igrab(state->inode);
2512 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2514 if (ctx->state == NULL)
2517 nfs4_close_sync(ctx->state, ctx->mode);
2519 nfs4_close_state(ctx->state, ctx->mode);
2522 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2524 struct nfs4_server_caps_arg args = {
2527 struct nfs4_server_caps_res res = {};
2528 struct rpc_message msg = {
2529 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2535 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2537 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2538 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2539 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2540 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2541 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2542 NFS_CAP_CTIME|NFS_CAP_MTIME);
2543 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2544 server->caps |= NFS_CAP_ACLS;
2545 if (res.has_links != 0)
2546 server->caps |= NFS_CAP_HARDLINKS;
2547 if (res.has_symlinks != 0)
2548 server->caps |= NFS_CAP_SYMLINKS;
2549 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2550 server->caps |= NFS_CAP_FILEID;
2551 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2552 server->caps |= NFS_CAP_MODE;
2553 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2554 server->caps |= NFS_CAP_NLINK;
2555 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2556 server->caps |= NFS_CAP_OWNER;
2557 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2558 server->caps |= NFS_CAP_OWNER_GROUP;
2559 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2560 server->caps |= NFS_CAP_ATIME;
2561 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2562 server->caps |= NFS_CAP_CTIME;
2563 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2564 server->caps |= NFS_CAP_MTIME;
2566 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2567 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2568 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2569 server->acl_bitmask = res.acl_bitmask;
2570 server->fh_expire_type = res.fh_expire_type;
2576 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2578 struct nfs4_exception exception = { };
2581 err = nfs4_handle_exception(server,
2582 _nfs4_server_capabilities(server, fhandle),
2584 } while (exception.retry);
2588 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2589 struct nfs_fsinfo *info)
2591 struct nfs4_lookup_root_arg args = {
2592 .bitmask = nfs4_fattr_bitmap,
2594 struct nfs4_lookup_res res = {
2596 .fattr = info->fattr,
2599 struct rpc_message msg = {
2600 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2605 nfs_fattr_init(info->fattr);
2606 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2609 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2610 struct nfs_fsinfo *info)
2612 struct nfs4_exception exception = { };
2615 err = _nfs4_lookup_root(server, fhandle, info);
2618 case -NFS4ERR_WRONGSEC:
2621 err = nfs4_handle_exception(server, err, &exception);
2623 } while (exception.retry);
2628 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2629 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2631 struct rpc_auth *auth;
2634 auth = rpcauth_create(flavor, server->client);
2639 ret = nfs4_lookup_root(server, fhandle, info);
2644 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2645 struct nfs_fsinfo *info)
2647 int i, len, status = 0;
2648 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2650 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2654 for (i = 0; i < len; i++) {
2655 /* AUTH_UNIX is the default flavor if none was specified,
2656 * thus has already been tried. */
2657 if (flav_array[i] == RPC_AUTH_UNIX)
2660 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2661 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2666 * -EACCESS could mean that the user doesn't have correct permissions
2667 * to access the mount. It could also mean that we tried to mount
2668 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2669 * existing mount programs don't handle -EACCES very well so it should
2670 * be mapped to -EPERM instead.
2672 if (status == -EACCES)
2678 * get the file handle for the "/" directory on the server
2680 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2681 struct nfs_fsinfo *info)
2683 int minor_version = server->nfs_client->cl_minorversion;
2684 int status = nfs4_lookup_root(server, fhandle, info);
2685 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2687 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2688 * by nfs4_map_errors() as this function exits.
2690 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2692 status = nfs4_server_capabilities(server, fhandle);
2694 status = nfs4_do_fsinfo(server, fhandle, info);
2695 return nfs4_map_errors(status);
2698 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2699 struct nfs_fsinfo *info)
2702 struct nfs_fattr *fattr = info->fattr;
2704 error = nfs4_server_capabilities(server, mntfh);
2706 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2710 error = nfs4_proc_getattr(server, mntfh, fattr);
2712 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2716 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2717 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2718 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2724 * Get locations and (maybe) other attributes of a referral.
2725 * Note that we'll actually follow the referral later when
2726 * we detect fsid mismatch in inode revalidation
2728 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2729 const struct qstr *name, struct nfs_fattr *fattr,
2730 struct nfs_fh *fhandle)
2732 int status = -ENOMEM;
2733 struct page *page = NULL;
2734 struct nfs4_fs_locations *locations = NULL;
2736 page = alloc_page(GFP_KERNEL);
2739 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2740 if (locations == NULL)
2743 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2746 /* Make sure server returned a different fsid for the referral */
2747 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2748 dprintk("%s: server did not return a different fsid for"
2749 " a referral at %s\n", __func__, name->name);
2753 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2754 nfs_fixup_referral_attributes(&locations->fattr);
2756 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2757 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2758 memset(fhandle, 0, sizeof(struct nfs_fh));
2766 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2768 struct nfs4_getattr_arg args = {
2770 .bitmask = server->attr_bitmask,
2772 struct nfs4_getattr_res res = {
2776 struct rpc_message msg = {
2777 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2782 nfs_fattr_init(fattr);
2783 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2786 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2788 struct nfs4_exception exception = { };
2791 err = nfs4_handle_exception(server,
2792 _nfs4_proc_getattr(server, fhandle, fattr),
2794 } while (exception.retry);
2799 * The file is not closed if it is opened due to the a request to change
2800 * the size of the file. The open call will not be needed once the
2801 * VFS layer lookup-intents are implemented.
2803 * Close is called when the inode is destroyed.
2804 * If we haven't opened the file for O_WRONLY, we
2805 * need to in the size_change case to obtain a stateid.
2808 * Because OPEN is always done by name in nfsv4, it is
2809 * possible that we opened a different file by the same
2810 * name. We can recognize this race condition, but we
2811 * can't do anything about it besides returning an error.
2813 * This will be fixed with VFS changes (lookup-intent).
2816 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2817 struct iattr *sattr)
2819 struct inode *inode = dentry->d_inode;
2820 struct rpc_cred *cred = NULL;
2821 struct nfs4_state *state = NULL;
2824 if (pnfs_ld_layoutret_on_setattr(inode))
2825 pnfs_return_layout(inode);
2827 nfs_fattr_init(fattr);
2829 /* Deal with open(O_TRUNC) */
2830 if (sattr->ia_valid & ATTR_OPEN)
2831 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2833 /* Optimization: if the end result is no change, don't RPC */
2834 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2837 /* Search for an existing open(O_WRITE) file */
2838 if (sattr->ia_valid & ATTR_FILE) {
2839 struct nfs_open_context *ctx;
2841 ctx = nfs_file_open_context(sattr->ia_file);
2848 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2850 nfs_setattr_update_inode(inode, sattr);
2854 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2855 const struct qstr *name, struct nfs_fh *fhandle,
2856 struct nfs_fattr *fattr)
2858 struct nfs_server *server = NFS_SERVER(dir);
2860 struct nfs4_lookup_arg args = {
2861 .bitmask = server->attr_bitmask,
2862 .dir_fh = NFS_FH(dir),
2865 struct nfs4_lookup_res res = {
2870 struct rpc_message msg = {
2871 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2876 nfs_fattr_init(fattr);
2878 dprintk("NFS call lookup %s\n", name->name);
2879 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2880 dprintk("NFS reply lookup: %d\n", status);
2884 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2886 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2887 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2888 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2892 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2893 struct qstr *name, struct nfs_fh *fhandle,
2894 struct nfs_fattr *fattr)
2896 struct nfs4_exception exception = { };
2897 struct rpc_clnt *client = *clnt;
2900 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2902 case -NFS4ERR_BADNAME:
2905 case -NFS4ERR_MOVED:
2906 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2908 case -NFS4ERR_WRONGSEC:
2910 if (client != *clnt)
2913 client = nfs4_create_sec_client(client, dir, name);
2915 return PTR_ERR(client);
2917 exception.retry = 1;
2920 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2922 } while (exception.retry);
2927 else if (client != *clnt)
2928 rpc_shutdown_client(client);
2933 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2934 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2937 struct rpc_clnt *client = NFS_CLIENT(dir);
2939 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2940 if (client != NFS_CLIENT(dir)) {
2941 rpc_shutdown_client(client);
2942 nfs_fixup_secinfo_attributes(fattr);
2948 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2949 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2952 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2954 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2956 rpc_shutdown_client(client);
2957 return ERR_PTR(status);
2962 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2964 struct nfs_server *server = NFS_SERVER(inode);
2965 struct nfs4_accessargs args = {
2966 .fh = NFS_FH(inode),
2967 .bitmask = server->cache_consistency_bitmask,
2969 struct nfs4_accessres res = {
2972 struct rpc_message msg = {
2973 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2976 .rpc_cred = entry->cred,
2978 int mode = entry->mask;
2982 * Determine which access bits we want to ask for...
2984 if (mode & MAY_READ)
2985 args.access |= NFS4_ACCESS_READ;
2986 if (S_ISDIR(inode->i_mode)) {
2987 if (mode & MAY_WRITE)
2988 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2989 if (mode & MAY_EXEC)
2990 args.access |= NFS4_ACCESS_LOOKUP;
2992 if (mode & MAY_WRITE)
2993 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2994 if (mode & MAY_EXEC)
2995 args.access |= NFS4_ACCESS_EXECUTE;
2998 res.fattr = nfs_alloc_fattr();
2999 if (res.fattr == NULL)
3002 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3004 nfs_access_set_mask(entry, res.access);
3005 nfs_refresh_inode(inode, res.fattr);
3007 nfs_free_fattr(res.fattr);
3011 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3013 struct nfs4_exception exception = { };
3016 err = nfs4_handle_exception(NFS_SERVER(inode),
3017 _nfs4_proc_access(inode, entry),
3019 } while (exception.retry);
3024 * TODO: For the time being, we don't try to get any attributes
3025 * along with any of the zero-copy operations READ, READDIR,
3028 * In the case of the first three, we want to put the GETATTR
3029 * after the read-type operation -- this is because it is hard
3030 * to predict the length of a GETATTR response in v4, and thus
3031 * align the READ data correctly. This means that the GETATTR
3032 * may end up partially falling into the page cache, and we should
3033 * shift it into the 'tail' of the xdr_buf before processing.
3034 * To do this efficiently, we need to know the total length
3035 * of data received, which doesn't seem to be available outside
3038 * In the case of WRITE, we also want to put the GETATTR after
3039 * the operation -- in this case because we want to make sure
3040 * we get the post-operation mtime and size.
3042 * Both of these changes to the XDR layer would in fact be quite
3043 * minor, but I decided to leave them for a subsequent patch.
3045 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3046 unsigned int pgbase, unsigned int pglen)
3048 struct nfs4_readlink args = {
3049 .fh = NFS_FH(inode),
3054 struct nfs4_readlink_res res;
3055 struct rpc_message msg = {
3056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3061 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3064 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3065 unsigned int pgbase, unsigned int pglen)
3067 struct nfs4_exception exception = { };
3070 err = nfs4_handle_exception(NFS_SERVER(inode),
3071 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3073 } while (exception.retry);
3078 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3081 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3084 struct nfs_open_context *ctx;
3085 struct nfs4_state *state;
3088 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3090 return PTR_ERR(ctx);
3092 sattr->ia_mode &= ~current_umask();
3093 state = nfs4_do_open(dir, dentry, ctx->mode,
3094 flags, sattr, ctx->cred,
3095 &ctx->mdsthreshold);
3097 if (IS_ERR(state)) {
3098 status = PTR_ERR(state);
3101 d_add(dentry, igrab(state->inode));
3102 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
3105 put_nfs_open_context(ctx);
3109 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3111 struct nfs_server *server = NFS_SERVER(dir);
3112 struct nfs_removeargs args = {
3116 struct nfs_removeres res = {
3119 struct rpc_message msg = {
3120 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3126 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3128 update_changeattr(dir, &res.cinfo);
3132 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3134 struct nfs4_exception exception = { };
3137 err = nfs4_handle_exception(NFS_SERVER(dir),
3138 _nfs4_proc_remove(dir, name),
3140 } while (exception.retry);
3144 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3146 struct nfs_server *server = NFS_SERVER(dir);
3147 struct nfs_removeargs *args = msg->rpc_argp;
3148 struct nfs_removeres *res = msg->rpc_resp;
3150 res->server = server;
3151 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3152 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
3155 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3157 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
3158 &data->args.seq_args,
3162 rpc_call_start(task);
3165 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3167 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3169 if (!nfs4_sequence_done(task, &res->seq_res))
3171 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3173 update_changeattr(dir, &res->cinfo);
3177 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3179 struct nfs_server *server = NFS_SERVER(dir);
3180 struct nfs_renameargs *arg = msg->rpc_argp;
3181 struct nfs_renameres *res = msg->rpc_resp;
3183 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3184 res->server = server;
3185 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
3188 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3190 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3191 &data->args.seq_args,
3195 rpc_call_start(task);
3198 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3199 struct inode *new_dir)
3201 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3203 if (!nfs4_sequence_done(task, &res->seq_res))
3205 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3208 update_changeattr(old_dir, &res->old_cinfo);
3209 update_changeattr(new_dir, &res->new_cinfo);
3213 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3214 struct inode *new_dir, struct qstr *new_name)
3216 struct nfs_server *server = NFS_SERVER(old_dir);
3217 struct nfs_renameargs arg = {
3218 .old_dir = NFS_FH(old_dir),
3219 .new_dir = NFS_FH(new_dir),
3220 .old_name = old_name,
3221 .new_name = new_name,
3223 struct nfs_renameres res = {
3226 struct rpc_message msg = {
3227 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3231 int status = -ENOMEM;
3233 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3235 update_changeattr(old_dir, &res.old_cinfo);
3236 update_changeattr(new_dir, &res.new_cinfo);
3241 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3242 struct inode *new_dir, struct qstr *new_name)
3244 struct nfs4_exception exception = { };
3247 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3248 _nfs4_proc_rename(old_dir, old_name,
3251 } while (exception.retry);
3255 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3257 struct nfs_server *server = NFS_SERVER(inode);
3258 struct nfs4_link_arg arg = {
3259 .fh = NFS_FH(inode),
3260 .dir_fh = NFS_FH(dir),
3262 .bitmask = server->attr_bitmask,
3264 struct nfs4_link_res res = {
3267 struct rpc_message msg = {
3268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3272 int status = -ENOMEM;
3274 res.fattr = nfs_alloc_fattr();
3275 if (res.fattr == NULL)
3278 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3280 update_changeattr(dir, &res.cinfo);
3281 nfs_post_op_update_inode(inode, res.fattr);
3284 nfs_free_fattr(res.fattr);
3288 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3290 struct nfs4_exception exception = { };
3293 err = nfs4_handle_exception(NFS_SERVER(inode),
3294 _nfs4_proc_link(inode, dir, name),
3296 } while (exception.retry);
3300 struct nfs4_createdata {
3301 struct rpc_message msg;
3302 struct nfs4_create_arg arg;
3303 struct nfs4_create_res res;
3305 struct nfs_fattr fattr;
3308 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3309 struct qstr *name, struct iattr *sattr, u32 ftype)
3311 struct nfs4_createdata *data;
3313 data = kzalloc(sizeof(*data), GFP_KERNEL);
3315 struct nfs_server *server = NFS_SERVER(dir);
3317 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3318 data->msg.rpc_argp = &data->arg;
3319 data->msg.rpc_resp = &data->res;
3320 data->arg.dir_fh = NFS_FH(dir);
3321 data->arg.server = server;
3322 data->arg.name = name;
3323 data->arg.attrs = sattr;
3324 data->arg.ftype = ftype;
3325 data->arg.bitmask = server->attr_bitmask;
3326 data->res.server = server;
3327 data->res.fh = &data->fh;
3328 data->res.fattr = &data->fattr;
3329 nfs_fattr_init(data->res.fattr);
3334 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3336 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3337 &data->arg.seq_args, &data->res.seq_res, 1);
3339 update_changeattr(dir, &data->res.dir_cinfo);
3340 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3345 static void nfs4_free_createdata(struct nfs4_createdata *data)
3350 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3351 struct page *page, unsigned int len, struct iattr *sattr)
3353 struct nfs4_createdata *data;
3354 int status = -ENAMETOOLONG;
3356 if (len > NFS4_MAXPATHLEN)
3360 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3364 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3365 data->arg.u.symlink.pages = &page;
3366 data->arg.u.symlink.len = len;
3368 status = nfs4_do_create(dir, dentry, data);
3370 nfs4_free_createdata(data);
3375 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3376 struct page *page, unsigned int len, struct iattr *sattr)
3378 struct nfs4_exception exception = { };
3381 err = nfs4_handle_exception(NFS_SERVER(dir),
3382 _nfs4_proc_symlink(dir, dentry, page,
3385 } while (exception.retry);
3389 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3390 struct iattr *sattr)
3392 struct nfs4_createdata *data;
3393 int status = -ENOMEM;
3395 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3399 status = nfs4_do_create(dir, dentry, data);
3401 nfs4_free_createdata(data);
3406 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3407 struct iattr *sattr)
3409 struct nfs4_exception exception = { };
3412 sattr->ia_mode &= ~current_umask();
3414 err = nfs4_handle_exception(NFS_SERVER(dir),
3415 _nfs4_proc_mkdir(dir, dentry, sattr),
3417 } while (exception.retry);
3421 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3422 u64 cookie, struct page **pages, unsigned int count, int plus)
3424 struct inode *dir = dentry->d_inode;
3425 struct nfs4_readdir_arg args = {
3430 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3433 struct nfs4_readdir_res res;
3434 struct rpc_message msg = {
3435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3442 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3443 dentry->d_parent->d_name.name,
3444 dentry->d_name.name,
3445 (unsigned long long)cookie);
3446 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3447 res.pgbase = args.pgbase;
3448 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3450 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3451 status += args.pgbase;
3454 nfs_invalidate_atime(dir);
3456 dprintk("%s: returns %d\n", __func__, status);
3460 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3461 u64 cookie, struct page **pages, unsigned int count, int plus)
3463 struct nfs4_exception exception = { };
3466 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3467 _nfs4_proc_readdir(dentry, cred, cookie,
3468 pages, count, plus),
3470 } while (exception.retry);
3474 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3475 struct iattr *sattr, dev_t rdev)
3477 struct nfs4_createdata *data;
3478 int mode = sattr->ia_mode;
3479 int status = -ENOMEM;
3481 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3486 data->arg.ftype = NF4FIFO;
3487 else if (S_ISBLK(mode)) {
3488 data->arg.ftype = NF4BLK;
3489 data->arg.u.device.specdata1 = MAJOR(rdev);
3490 data->arg.u.device.specdata2 = MINOR(rdev);
3492 else if (S_ISCHR(mode)) {
3493 data->arg.ftype = NF4CHR;
3494 data->arg.u.device.specdata1 = MAJOR(rdev);
3495 data->arg.u.device.specdata2 = MINOR(rdev);
3496 } else if (!S_ISSOCK(mode)) {
3501 status = nfs4_do_create(dir, dentry, data);
3503 nfs4_free_createdata(data);
3508 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3509 struct iattr *sattr, dev_t rdev)
3511 struct nfs4_exception exception = { };
3514 sattr->ia_mode &= ~current_umask();
3516 err = nfs4_handle_exception(NFS_SERVER(dir),
3517 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3519 } while (exception.retry);
3523 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3524 struct nfs_fsstat *fsstat)
3526 struct nfs4_statfs_arg args = {
3528 .bitmask = server->attr_bitmask,
3530 struct nfs4_statfs_res res = {
3533 struct rpc_message msg = {
3534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3539 nfs_fattr_init(fsstat->fattr);
3540 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3543 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3545 struct nfs4_exception exception = { };
3548 err = nfs4_handle_exception(server,
3549 _nfs4_proc_statfs(server, fhandle, fsstat),
3551 } while (exception.retry);
3555 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3556 struct nfs_fsinfo *fsinfo)
3558 struct nfs4_fsinfo_arg args = {
3560 .bitmask = server->attr_bitmask,
3562 struct nfs4_fsinfo_res res = {
3565 struct rpc_message msg = {
3566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3571 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3574 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3576 struct nfs4_exception exception = { };
3580 err = nfs4_handle_exception(server,
3581 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3583 } while (exception.retry);
3587 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3591 nfs_fattr_init(fsinfo->fattr);
3592 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3594 /* block layout checks this! */
3595 server->pnfs_blksize = fsinfo->blksize;
3596 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3602 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3603 struct nfs_pathconf *pathconf)
3605 struct nfs4_pathconf_arg args = {
3607 .bitmask = server->attr_bitmask,
3609 struct nfs4_pathconf_res res = {
3610 .pathconf = pathconf,
3612 struct rpc_message msg = {
3613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3618 /* None of the pathconf attributes are mandatory to implement */
3619 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3620 memset(pathconf, 0, sizeof(*pathconf));
3624 nfs_fattr_init(pathconf->fattr);
3625 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3628 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3629 struct nfs_pathconf *pathconf)
3631 struct nfs4_exception exception = { };
3635 err = nfs4_handle_exception(server,
3636 _nfs4_proc_pathconf(server, fhandle, pathconf),
3638 } while (exception.retry);
3642 void __nfs4_read_done_cb(struct nfs_read_data *data)
3644 nfs_invalidate_atime(data->header->inode);
3647 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3649 struct nfs_server *server = NFS_SERVER(data->header->inode);
3651 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3652 rpc_restart_call_prepare(task);
3656 __nfs4_read_done_cb(data);
3657 if (task->tk_status > 0)
3658 renew_lease(server, data->timestamp);
3662 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3665 dprintk("--> %s\n", __func__);
3667 if (!nfs4_sequence_done(task, &data->res.seq_res))
3670 return data->read_done_cb ? data->read_done_cb(task, data) :
3671 nfs4_read_done_cb(task, data);
3674 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3676 data->timestamp = jiffies;
3677 data->read_done_cb = nfs4_read_done_cb;
3678 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3679 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3682 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3684 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3685 &data->args.seq_args,
3689 rpc_call_start(task);
3692 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3694 struct inode *inode = data->header->inode;
3696 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3697 rpc_restart_call_prepare(task);
3700 if (task->tk_status >= 0) {
3701 renew_lease(NFS_SERVER(inode), data->timestamp);
3702 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3707 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3709 if (!nfs4_sequence_done(task, &data->res.seq_res))
3711 return data->write_done_cb ? data->write_done_cb(task, data) :
3712 nfs4_write_done_cb(task, data);
3716 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3718 const struct nfs_pgio_header *hdr = data->header;
3720 /* Don't request attributes for pNFS or O_DIRECT writes */
3721 if (data->ds_clp != NULL || hdr->dreq != NULL)
3723 /* Otherwise, request attributes if and only if we don't hold
3726 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3729 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3731 struct nfs_server *server = NFS_SERVER(data->header->inode);
3733 if (!nfs4_write_need_cache_consistency_data(data)) {
3734 data->args.bitmask = NULL;
3735 data->res.fattr = NULL;
3737 data->args.bitmask = server->cache_consistency_bitmask;
3739 if (!data->write_done_cb)
3740 data->write_done_cb = nfs4_write_done_cb;
3741 data->res.server = server;
3742 data->timestamp = jiffies;
3744 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3745 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3748 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3750 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3751 &data->args.seq_args,
3755 rpc_call_start(task);
3758 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3760 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3761 &data->args.seq_args,
3765 rpc_call_start(task);
3768 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3770 struct inode *inode = data->inode;
3772 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3773 rpc_restart_call_prepare(task);
3779 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3781 if (!nfs4_sequence_done(task, &data->res.seq_res))
3783 return data->commit_done_cb(task, data);
3786 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3788 struct nfs_server *server = NFS_SERVER(data->inode);
3790 if (data->commit_done_cb == NULL)
3791 data->commit_done_cb = nfs4_commit_done_cb;
3792 data->res.server = server;
3793 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3794 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3797 struct nfs4_renewdata {
3798 struct nfs_client *client;
3799 unsigned long timestamp;
3803 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3804 * standalone procedure for queueing an asynchronous RENEW.
3806 static void nfs4_renew_release(void *calldata)
3808 struct nfs4_renewdata *data = calldata;
3809 struct nfs_client *clp = data->client;
3811 if (atomic_read(&clp->cl_count) > 1)
3812 nfs4_schedule_state_renewal(clp);
3813 nfs_put_client(clp);
3817 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3819 struct nfs4_renewdata *data = calldata;
3820 struct nfs_client *clp = data->client;
3821 unsigned long timestamp = data->timestamp;
3823 if (task->tk_status < 0) {
3824 /* Unless we're shutting down, schedule state recovery! */
3825 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3827 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3828 nfs4_schedule_lease_recovery(clp);
3831 nfs4_schedule_path_down_recovery(clp);
3833 do_renew_lease(clp, timestamp);
3836 static const struct rpc_call_ops nfs4_renew_ops = {
3837 .rpc_call_done = nfs4_renew_done,
3838 .rpc_release = nfs4_renew_release,
3841 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3843 struct rpc_message msg = {
3844 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3848 struct nfs4_renewdata *data;
3850 if (renew_flags == 0)
3852 if (!atomic_inc_not_zero(&clp->cl_count))
3854 data = kmalloc(sizeof(*data), GFP_NOFS);
3858 data->timestamp = jiffies;
3859 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3860 &nfs4_renew_ops, data);
3863 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3865 struct rpc_message msg = {
3866 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3870 unsigned long now = jiffies;
3873 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3876 do_renew_lease(clp, now);
3880 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3882 return (server->caps & NFS_CAP_ACLS)
3883 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3884 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3887 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3888 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3891 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3893 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3894 struct page **pages, unsigned int *pgbase)
3896 struct page *newpage, **spages;
3902 len = min_t(size_t, PAGE_SIZE, buflen);
3903 newpage = alloc_page(GFP_KERNEL);
3905 if (newpage == NULL)
3907 memcpy(page_address(newpage), buf, len);
3912 } while (buflen != 0);
3918 __free_page(spages[rc-1]);
3922 struct nfs4_cached_acl {
3928 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3930 struct nfs_inode *nfsi = NFS_I(inode);
3932 spin_lock(&inode->i_lock);
3933 kfree(nfsi->nfs4_acl);
3934 nfsi->nfs4_acl = acl;
3935 spin_unlock(&inode->i_lock);
3938 static void nfs4_zap_acl_attr(struct inode *inode)
3940 nfs4_set_cached_acl(inode, NULL);
3943 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3945 struct nfs_inode *nfsi = NFS_I(inode);
3946 struct nfs4_cached_acl *acl;
3949 spin_lock(&inode->i_lock);
3950 acl = nfsi->nfs4_acl;
3953 if (buf == NULL) /* user is just asking for length */
3955 if (acl->cached == 0)
3957 ret = -ERANGE; /* see getxattr(2) man page */
3958 if (acl->len > buflen)
3960 memcpy(buf, acl->data, acl->len);
3964 spin_unlock(&inode->i_lock);
3968 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3970 struct nfs4_cached_acl *acl;
3971 size_t buflen = sizeof(*acl) + acl_len;
3973 if (buflen <= PAGE_SIZE) {
3974 acl = kmalloc(buflen, GFP_KERNEL);
3978 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3980 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3987 nfs4_set_cached_acl(inode, acl);
3991 * The getxattr API returns the required buffer length when called with a
3992 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3993 * the required buf. On a NULL buf, we send a page of data to the server
3994 * guessing that the ACL request can be serviced by a page. If so, we cache
3995 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3996 * the cache. If not so, we throw away the page, and cache the required
3997 * length. The next getxattr call will then produce another round trip to
3998 * the server, this time with the input buf of the required size.
4000 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4002 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
4003 struct nfs_getaclargs args = {
4004 .fh = NFS_FH(inode),
4008 struct nfs_getaclres res = {
4011 struct rpc_message msg = {
4012 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4016 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4017 int ret = -ENOMEM, i;
4019 /* As long as we're doing a round trip to the server anyway,
4020 * let's be prepared for a page of acl data. */
4023 if (npages > ARRAY_SIZE(pages))
4026 for (i = 0; i < npages; i++) {
4027 pages[i] = alloc_page(GFP_KERNEL);
4032 /* for decoding across pages */
4033 res.acl_scratch = alloc_page(GFP_KERNEL);
4034 if (!res.acl_scratch)
4037 args.acl_len = npages * PAGE_SIZE;
4038 args.acl_pgbase = 0;
4040 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4041 __func__, buf, buflen, npages, args.acl_len);
4042 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4043 &msg, &args.seq_args, &res.seq_res, 0);
4047 /* Handle the case where the passed-in buffer is too short */
4048 if (res.acl_flags & NFS4_ACL_TRUNC) {
4049 /* Did the user only issue a request for the acl length? */
4055 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4057 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4061 for (i = 0; i < npages; i++)
4063 __free_page(pages[i]);
4064 if (res.acl_scratch)
4065 __free_page(res.acl_scratch);
4069 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4071 struct nfs4_exception exception = { };
4074 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4077 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4078 } while (exception.retry);
4082 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4084 struct nfs_server *server = NFS_SERVER(inode);
4087 if (!nfs4_server_supports_acls(server))
4089 ret = nfs_revalidate_inode(server, inode);
4092 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4093 nfs_zap_acl_cache(inode);
4094 ret = nfs4_read_cached_acl(inode, buf, buflen);
4096 /* -ENOENT is returned if there is no ACL or if there is an ACL
4097 * but no cached acl data, just the acl length */
4099 return nfs4_get_acl_uncached(inode, buf, buflen);
4102 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4104 struct nfs_server *server = NFS_SERVER(inode);
4105 struct page *pages[NFS4ACL_MAXPAGES];
4106 struct nfs_setaclargs arg = {
4107 .fh = NFS_FH(inode),
4111 struct nfs_setaclres res;
4112 struct rpc_message msg = {
4113 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4117 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4120 if (!nfs4_server_supports_acls(server))
4122 if (npages > ARRAY_SIZE(pages))
4124 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4127 nfs4_inode_return_delegation(inode);
4128 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4131 * Free each page after tx, so the only ref left is
4132 * held by the network stack
4135 put_page(pages[i-1]);
4138 * Acl update can result in inode attribute update.
4139 * so mark the attribute cache invalid.
4141 spin_lock(&inode->i_lock);
4142 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4143 spin_unlock(&inode->i_lock);
4144 nfs_access_zap_cache(inode);
4145 nfs_zap_acl_cache(inode);
4149 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4151 struct nfs4_exception exception = { };
4154 err = nfs4_handle_exception(NFS_SERVER(inode),
4155 __nfs4_proc_set_acl(inode, buf, buflen),
4157 } while (exception.retry);
4162 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
4164 struct nfs_client *clp = server->nfs_client;
4166 if (task->tk_status >= 0)
4168 switch(task->tk_status) {
4169 case -NFS4ERR_DELEG_REVOKED:
4170 case -NFS4ERR_ADMIN_REVOKED:
4171 case -NFS4ERR_BAD_STATEID:
4174 nfs_remove_bad_delegation(state->inode);
4175 case -NFS4ERR_OPENMODE:
4178 nfs4_schedule_stateid_recovery(server, state);
4179 goto wait_on_recovery;
4180 case -NFS4ERR_EXPIRED:
4182 nfs4_schedule_stateid_recovery(server, state);
4183 case -NFS4ERR_STALE_STATEID:
4184 case -NFS4ERR_STALE_CLIENTID:
4185 nfs4_schedule_lease_recovery(clp);
4186 goto wait_on_recovery;
4187 #if defined(CONFIG_NFS_V4_1)
4188 case -NFS4ERR_BADSESSION:
4189 case -NFS4ERR_BADSLOT:
4190 case -NFS4ERR_BAD_HIGH_SLOT:
4191 case -NFS4ERR_DEADSESSION:
4192 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4193 case -NFS4ERR_SEQ_FALSE_RETRY:
4194 case -NFS4ERR_SEQ_MISORDERED:
4195 dprintk("%s ERROR %d, Reset session\n", __func__,
4197 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4198 task->tk_status = 0;
4200 #endif /* CONFIG_NFS_V4_1 */
4201 case -NFS4ERR_DELAY:
4202 nfs_inc_server_stats(server, NFSIOS_DELAY);
4203 case -NFS4ERR_GRACE:
4205 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4206 task->tk_status = 0;
4208 case -NFS4ERR_RETRY_UNCACHED_REP:
4209 case -NFS4ERR_OLD_STATEID:
4210 task->tk_status = 0;
4213 task->tk_status = nfs4_map_errors(task->tk_status);
4216 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4217 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4218 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4219 task->tk_status = 0;
4223 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4224 nfs4_verifier *bootverf)
4228 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4229 /* An impossible timestamp guarantees this value
4230 * will never match a generated boot time. */
4232 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4234 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4235 verf[0] = (__be32)nn->boot_time.tv_sec;
4236 verf[1] = (__be32)nn->boot_time.tv_nsec;
4238 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4242 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4243 char *buf, size_t len)
4245 unsigned int result;
4248 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4250 rpc_peeraddr2str(clp->cl_rpcclient,
4252 rpc_peeraddr2str(clp->cl_rpcclient,
4253 RPC_DISPLAY_PROTO));
4259 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4260 char *buf, size_t len)
4262 char *nodename = clp->cl_rpcclient->cl_nodename;
4264 if (nfs4_client_id_uniquifier[0] != '\0')
4265 nodename = nfs4_client_id_uniquifier;
4266 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4267 clp->rpc_ops->version, clp->cl_minorversion,
4272 * nfs4_proc_setclientid - Negotiate client ID
4273 * @clp: state data structure
4274 * @program: RPC program for NFSv4 callback service
4275 * @port: IP port number for NFS4 callback service
4276 * @cred: RPC credential to use for this call
4277 * @res: where to place the result
4279 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4281 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4282 unsigned short port, struct rpc_cred *cred,
4283 struct nfs4_setclientid_res *res)
4285 nfs4_verifier sc_verifier;
4286 struct nfs4_setclientid setclientid = {
4287 .sc_verifier = &sc_verifier,
4289 .sc_cb_ident = clp->cl_cb_ident,
4291 struct rpc_message msg = {
4292 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4293 .rpc_argp = &setclientid,
4299 /* nfs_client_id4 */
4300 nfs4_init_boot_verifier(clp, &sc_verifier);
4301 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4302 setclientid.sc_name_len =
4303 nfs4_init_uniform_client_string(clp,
4304 setclientid.sc_name,
4305 sizeof(setclientid.sc_name));
4307 setclientid.sc_name_len =
4308 nfs4_init_nonuniform_client_string(clp,
4309 setclientid.sc_name,
4310 sizeof(setclientid.sc_name));
4313 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4314 sizeof(setclientid.sc_netid),
4315 rpc_peeraddr2str(clp->cl_rpcclient,
4316 RPC_DISPLAY_NETID));
4318 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4319 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4320 clp->cl_ipaddr, port >> 8, port & 255);
4322 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4323 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4324 setclientid.sc_name_len, setclientid.sc_name);
4325 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4326 dprintk("NFS reply setclientid: %d\n", status);
4331 * nfs4_proc_setclientid_confirm - Confirm client ID
4332 * @clp: state data structure
4333 * @res: result of a previous SETCLIENTID
4334 * @cred: RPC credential to use for this call
4336 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4338 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4339 struct nfs4_setclientid_res *arg,
4340 struct rpc_cred *cred)
4342 struct nfs_fsinfo fsinfo;
4343 struct rpc_message msg = {
4344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4346 .rpc_resp = &fsinfo,
4352 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4353 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4356 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4358 spin_lock(&clp->cl_lock);
4359 clp->cl_lease_time = fsinfo.lease_time * HZ;
4360 clp->cl_last_renewal = now;
4361 spin_unlock(&clp->cl_lock);
4363 dprintk("NFS reply setclientid_confirm: %d\n", status);
4367 struct nfs4_delegreturndata {
4368 struct nfs4_delegreturnargs args;
4369 struct nfs4_delegreturnres res;
4371 nfs4_stateid stateid;
4372 unsigned long timestamp;
4373 struct nfs_fattr fattr;
4377 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4379 struct nfs4_delegreturndata *data = calldata;
4381 if (!nfs4_sequence_done(task, &data->res.seq_res))
4384 switch (task->tk_status) {
4385 case -NFS4ERR_STALE_STATEID:
4386 case -NFS4ERR_EXPIRED:
4388 renew_lease(data->res.server, data->timestamp);
4391 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4393 rpc_restart_call_prepare(task);
4397 data->rpc_status = task->tk_status;
4400 static void nfs4_delegreturn_release(void *calldata)
4405 #if defined(CONFIG_NFS_V4_1)
4406 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4408 struct nfs4_delegreturndata *d_data;
4410 d_data = (struct nfs4_delegreturndata *)data;
4412 if (nfs4_setup_sequence(d_data->res.server,
4413 &d_data->args.seq_args,
4414 &d_data->res.seq_res, task))
4416 rpc_call_start(task);
4418 #endif /* CONFIG_NFS_V4_1 */
4420 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4421 #if defined(CONFIG_NFS_V4_1)
4422 .rpc_call_prepare = nfs4_delegreturn_prepare,
4423 #endif /* CONFIG_NFS_V4_1 */
4424 .rpc_call_done = nfs4_delegreturn_done,
4425 .rpc_release = nfs4_delegreturn_release,
4428 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4430 struct nfs4_delegreturndata *data;
4431 struct nfs_server *server = NFS_SERVER(inode);
4432 struct rpc_task *task;
4433 struct rpc_message msg = {
4434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4437 struct rpc_task_setup task_setup_data = {
4438 .rpc_client = server->client,
4439 .rpc_message = &msg,
4440 .callback_ops = &nfs4_delegreturn_ops,
4441 .flags = RPC_TASK_ASYNC,
4445 data = kzalloc(sizeof(*data), GFP_NOFS);
4448 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4449 data->args.fhandle = &data->fh;
4450 data->args.stateid = &data->stateid;
4451 data->args.bitmask = server->cache_consistency_bitmask;
4452 nfs_copy_fh(&data->fh, NFS_FH(inode));
4453 nfs4_stateid_copy(&data->stateid, stateid);
4454 data->res.fattr = &data->fattr;
4455 data->res.server = server;
4456 nfs_fattr_init(data->res.fattr);
4457 data->timestamp = jiffies;
4458 data->rpc_status = 0;
4460 task_setup_data.callback_data = data;
4461 msg.rpc_argp = &data->args;
4462 msg.rpc_resp = &data->res;
4463 task = rpc_run_task(&task_setup_data);
4465 return PTR_ERR(task);
4468 status = nfs4_wait_for_completion_rpc_task(task);
4471 status = data->rpc_status;
4473 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4475 nfs_refresh_inode(inode, &data->fattr);
4481 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4483 struct nfs_server *server = NFS_SERVER(inode);
4484 struct nfs4_exception exception = { };
4487 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4489 case -NFS4ERR_STALE_STATEID:
4490 case -NFS4ERR_EXPIRED:
4494 err = nfs4_handle_exception(server, err, &exception);
4495 } while (exception.retry);
4499 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4500 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4503 * sleep, with exponential backoff, and retry the LOCK operation.
4505 static unsigned long
4506 nfs4_set_lock_task_retry(unsigned long timeout)
4508 freezable_schedule_timeout_killable(timeout);
4510 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4511 return NFS4_LOCK_MAXTIMEOUT;
4515 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4517 struct inode *inode = state->inode;
4518 struct nfs_server *server = NFS_SERVER(inode);
4519 struct nfs_client *clp = server->nfs_client;
4520 struct nfs_lockt_args arg = {
4521 .fh = NFS_FH(inode),
4524 struct nfs_lockt_res res = {
4527 struct rpc_message msg = {
4528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4531 .rpc_cred = state->owner->so_cred,
4533 struct nfs4_lock_state *lsp;
4536 arg.lock_owner.clientid = clp->cl_clientid;
4537 status = nfs4_set_lock_state(state, request);
4540 lsp = request->fl_u.nfs4_fl.owner;
4541 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4542 arg.lock_owner.s_dev = server->s_dev;
4543 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4546 request->fl_type = F_UNLCK;
4548 case -NFS4ERR_DENIED:
4551 request->fl_ops->fl_release_private(request);
4556 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4558 struct nfs4_exception exception = { };
4562 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4563 _nfs4_proc_getlk(state, cmd, request),
4565 } while (exception.retry);
4569 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4572 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4574 res = posix_lock_file_wait(file, fl);
4577 res = flock_lock_file_wait(file, fl);
4585 struct nfs4_unlockdata {
4586 struct nfs_locku_args arg;
4587 struct nfs_locku_res res;
4588 struct nfs4_lock_state *lsp;
4589 struct nfs_open_context *ctx;
4590 struct file_lock fl;
4591 const struct nfs_server *server;
4592 unsigned long timestamp;
4595 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4596 struct nfs_open_context *ctx,
4597 struct nfs4_lock_state *lsp,
4598 struct nfs_seqid *seqid)
4600 struct nfs4_unlockdata *p;
4601 struct inode *inode = lsp->ls_state->inode;
4603 p = kzalloc(sizeof(*p), GFP_NOFS);
4606 p->arg.fh = NFS_FH(inode);
4608 p->arg.seqid = seqid;
4609 p->res.seqid = seqid;
4610 p->arg.stateid = &lsp->ls_stateid;
4612 atomic_inc(&lsp->ls_count);
4613 /* Ensure we don't close file until we're done freeing locks! */
4614 p->ctx = get_nfs_open_context(ctx);
4615 memcpy(&p->fl, fl, sizeof(p->fl));
4616 p->server = NFS_SERVER(inode);
4620 static void nfs4_locku_release_calldata(void *data)
4622 struct nfs4_unlockdata *calldata = data;
4623 nfs_free_seqid(calldata->arg.seqid);
4624 nfs4_put_lock_state(calldata->lsp);
4625 put_nfs_open_context(calldata->ctx);
4629 static void nfs4_locku_done(struct rpc_task *task, void *data)
4631 struct nfs4_unlockdata *calldata = data;
4633 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4635 switch (task->tk_status) {
4637 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4638 &calldata->res.stateid);
4639 renew_lease(calldata->server, calldata->timestamp);
4641 case -NFS4ERR_BAD_STATEID:
4642 case -NFS4ERR_OLD_STATEID:
4643 case -NFS4ERR_STALE_STATEID:
4644 case -NFS4ERR_EXPIRED:
4647 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4648 rpc_restart_call_prepare(task);
4650 nfs_release_seqid(calldata->arg.seqid);
4653 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4655 struct nfs4_unlockdata *calldata = data;
4657 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4659 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
4660 /* Note: exit _without_ running nfs4_locku_done */
4661 task->tk_action = NULL;
4664 calldata->timestamp = jiffies;
4665 if (nfs4_setup_sequence(calldata->server,
4666 &calldata->arg.seq_args,
4667 &calldata->res.seq_res,
4669 nfs_release_seqid(calldata->arg.seqid);
4671 rpc_call_start(task);
4674 static const struct rpc_call_ops nfs4_locku_ops = {
4675 .rpc_call_prepare = nfs4_locku_prepare,
4676 .rpc_call_done = nfs4_locku_done,
4677 .rpc_release = nfs4_locku_release_calldata,
4680 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4681 struct nfs_open_context *ctx,
4682 struct nfs4_lock_state *lsp,
4683 struct nfs_seqid *seqid)
4685 struct nfs4_unlockdata *data;
4686 struct rpc_message msg = {
4687 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4688 .rpc_cred = ctx->cred,
4690 struct rpc_task_setup task_setup_data = {
4691 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4692 .rpc_message = &msg,
4693 .callback_ops = &nfs4_locku_ops,
4694 .workqueue = nfsiod_workqueue,
4695 .flags = RPC_TASK_ASYNC,
4698 /* Ensure this is an unlock - when canceling a lock, the
4699 * canceled lock is passed in, and it won't be an unlock.
4701 fl->fl_type = F_UNLCK;
4703 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4705 nfs_free_seqid(seqid);
4706 return ERR_PTR(-ENOMEM);
4709 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4710 msg.rpc_argp = &data->arg;
4711 msg.rpc_resp = &data->res;
4712 task_setup_data.callback_data = data;
4713 return rpc_run_task(&task_setup_data);
4716 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4718 struct nfs_inode *nfsi = NFS_I(state->inode);
4719 struct nfs_seqid *seqid;
4720 struct nfs4_lock_state *lsp;
4721 struct rpc_task *task;
4723 unsigned char fl_flags = request->fl_flags;
4725 status = nfs4_set_lock_state(state, request);
4726 /* Unlock _before_ we do the RPC call */
4727 request->fl_flags |= FL_EXISTS;
4728 down_read(&nfsi->rwsem);
4729 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4730 up_read(&nfsi->rwsem);
4733 up_read(&nfsi->rwsem);
4736 /* Is this a delegated lock? */
4737 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4739 lsp = request->fl_u.nfs4_fl.owner;
4740 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4744 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4745 status = PTR_ERR(task);
4748 status = nfs4_wait_for_completion_rpc_task(task);
4751 request->fl_flags = fl_flags;
4755 struct nfs4_lockdata {
4756 struct nfs_lock_args arg;
4757 struct nfs_lock_res res;
4758 struct nfs4_lock_state *lsp;
4759 struct nfs_open_context *ctx;
4760 struct file_lock fl;
4761 unsigned long timestamp;
4764 struct nfs_server *server;
4767 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4768 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4771 struct nfs4_lockdata *p;
4772 struct inode *inode = lsp->ls_state->inode;
4773 struct nfs_server *server = NFS_SERVER(inode);
4775 p = kzalloc(sizeof(*p), gfp_mask);
4779 p->arg.fh = NFS_FH(inode);
4781 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4782 if (p->arg.open_seqid == NULL)
4784 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4785 if (p->arg.lock_seqid == NULL)
4786 goto out_free_seqid;
4787 p->arg.lock_stateid = &lsp->ls_stateid;
4788 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4789 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4790 p->arg.lock_owner.s_dev = server->s_dev;
4791 p->res.lock_seqid = p->arg.lock_seqid;
4794 atomic_inc(&lsp->ls_count);
4795 p->ctx = get_nfs_open_context(ctx);
4796 memcpy(&p->fl, fl, sizeof(p->fl));
4799 nfs_free_seqid(p->arg.open_seqid);
4805 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4807 struct nfs4_lockdata *data = calldata;
4808 struct nfs4_state *state = data->lsp->ls_state;
4810 dprintk("%s: begin!\n", __func__);
4811 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4813 /* Do we need to do an open_to_lock_owner? */
4814 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4815 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4816 goto out_release_lock_seqid;
4817 data->arg.open_stateid = &state->stateid;
4818 data->arg.new_lock_owner = 1;
4819 data->res.open_seqid = data->arg.open_seqid;
4821 data->arg.new_lock_owner = 0;
4822 data->timestamp = jiffies;
4823 if (nfs4_setup_sequence(data->server,
4824 &data->arg.seq_args,
4827 rpc_call_start(task);
4830 nfs_release_seqid(data->arg.open_seqid);
4831 out_release_lock_seqid:
4832 nfs_release_seqid(data->arg.lock_seqid);
4833 dprintk("%s: done!, ret = %d\n", __func__, task->tk_status);
4836 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4838 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4839 nfs4_lock_prepare(task, calldata);
4842 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4844 struct nfs4_lockdata *data = calldata;
4846 dprintk("%s: begin!\n", __func__);
4848 if (!nfs4_sequence_done(task, &data->res.seq_res))
4851 data->rpc_status = task->tk_status;
4852 if (data->arg.new_lock_owner != 0) {
4853 if (data->rpc_status == 0)
4854 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4858 if (data->rpc_status == 0) {
4859 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4860 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
4861 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4864 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4867 static void nfs4_lock_release(void *calldata)
4869 struct nfs4_lockdata *data = calldata;
4871 dprintk("%s: begin!\n", __func__);
4872 nfs_free_seqid(data->arg.open_seqid);
4873 if (data->cancelled != 0) {
4874 struct rpc_task *task;
4875 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4876 data->arg.lock_seqid);
4878 rpc_put_task_async(task);
4879 dprintk("%s: cancelling lock!\n", __func__);
4881 nfs_free_seqid(data->arg.lock_seqid);
4882 nfs4_put_lock_state(data->lsp);
4883 put_nfs_open_context(data->ctx);
4885 dprintk("%s: done!\n", __func__);
4888 static const struct rpc_call_ops nfs4_lock_ops = {
4889 .rpc_call_prepare = nfs4_lock_prepare,
4890 .rpc_call_done = nfs4_lock_done,
4891 .rpc_release = nfs4_lock_release,
4894 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4895 .rpc_call_prepare = nfs4_recover_lock_prepare,
4896 .rpc_call_done = nfs4_lock_done,
4897 .rpc_release = nfs4_lock_release,
4900 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4903 case -NFS4ERR_ADMIN_REVOKED:
4904 case -NFS4ERR_BAD_STATEID:
4905 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4906 if (new_lock_owner != 0 ||
4907 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
4908 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4910 case -NFS4ERR_STALE_STATEID:
4911 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4912 case -NFS4ERR_EXPIRED:
4913 nfs4_schedule_lease_recovery(server->nfs_client);
4917 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4919 struct nfs4_lockdata *data;
4920 struct rpc_task *task;
4921 struct rpc_message msg = {
4922 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4923 .rpc_cred = state->owner->so_cred,
4925 struct rpc_task_setup task_setup_data = {
4926 .rpc_client = NFS_CLIENT(state->inode),
4927 .rpc_message = &msg,
4928 .callback_ops = &nfs4_lock_ops,
4929 .workqueue = nfsiod_workqueue,
4930 .flags = RPC_TASK_ASYNC,
4934 dprintk("%s: begin!\n", __func__);
4935 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4936 fl->fl_u.nfs4_fl.owner,
4937 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4941 data->arg.block = 1;
4942 if (recovery_type > NFS_LOCK_NEW) {
4943 if (recovery_type == NFS_LOCK_RECLAIM)
4944 data->arg.reclaim = NFS_LOCK_RECLAIM;
4945 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4947 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4948 msg.rpc_argp = &data->arg;
4949 msg.rpc_resp = &data->res;
4950 task_setup_data.callback_data = data;
4951 task = rpc_run_task(&task_setup_data);
4953 return PTR_ERR(task);
4954 ret = nfs4_wait_for_completion_rpc_task(task);
4956 ret = data->rpc_status;
4958 nfs4_handle_setlk_error(data->server, data->lsp,
4959 data->arg.new_lock_owner, ret);
4961 data->cancelled = 1;
4963 dprintk("%s: done, ret = %d!\n", __func__, ret);
4967 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4969 struct nfs_server *server = NFS_SERVER(state->inode);
4970 struct nfs4_exception exception = {
4971 .inode = state->inode,
4976 /* Cache the lock if possible... */
4977 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4979 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4980 if (err != -NFS4ERR_DELAY)
4982 nfs4_handle_exception(server, err, &exception);
4983 } while (exception.retry);
4987 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4989 struct nfs_server *server = NFS_SERVER(state->inode);
4990 struct nfs4_exception exception = {
4991 .inode = state->inode,
4995 err = nfs4_set_lock_state(state, request);
4999 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5001 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5005 case -NFS4ERR_GRACE:
5006 case -NFS4ERR_DELAY:
5007 nfs4_handle_exception(server, err, &exception);
5010 } while (exception.retry);
5015 #if defined(CONFIG_NFS_V4_1)
5017 * nfs41_check_expired_locks - possibly free a lock stateid
5019 * @state: NFSv4 state for an inode
5021 * Returns NFS_OK if recovery for this stateid is now finished.
5022 * Otherwise a negative NFS4ERR value is returned.
5024 static int nfs41_check_expired_locks(struct nfs4_state *state)
5026 int status, ret = -NFS4ERR_BAD_STATEID;
5027 struct nfs4_lock_state *lsp;
5028 struct nfs_server *server = NFS_SERVER(state->inode);
5030 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
5031 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
5032 status = nfs41_test_stateid(server, &lsp->ls_stateid);
5033 if (status != NFS_OK) {
5034 /* Free the stateid unless the server
5035 * informs us the stateid is unrecognized. */
5036 if (status != -NFS4ERR_BAD_STATEID)
5037 nfs41_free_stateid(server,
5039 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5048 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5050 int status = NFS_OK;
5052 if (test_bit(LK_STATE_IN_USE, &state->flags))
5053 status = nfs41_check_expired_locks(state);
5054 if (status != NFS_OK)
5055 status = nfs4_lock_expired(state, request);
5060 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5062 struct nfs_inode *nfsi = NFS_I(state->inode);
5063 unsigned char fl_flags = request->fl_flags;
5064 int status = -ENOLCK;
5066 if ((fl_flags & FL_POSIX) &&
5067 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5069 /* Is this a delegated open? */
5070 status = nfs4_set_lock_state(state, request);
5073 request->fl_flags |= FL_ACCESS;
5074 status = do_vfs_lock(request->fl_file, request);
5077 down_read(&nfsi->rwsem);
5078 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5079 /* Yes: cache locks! */
5080 /* ...but avoid races with delegation recall... */
5081 request->fl_flags = fl_flags & ~FL_SLEEP;
5082 status = do_vfs_lock(request->fl_file, request);
5085 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5088 /* Note: we always want to sleep here! */
5089 request->fl_flags = fl_flags | FL_SLEEP;
5090 if (do_vfs_lock(request->fl_file, request) < 0)
5091 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5092 "manager!\n", __func__);
5094 up_read(&nfsi->rwsem);
5096 request->fl_flags = fl_flags;
5100 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5102 struct nfs4_exception exception = {
5104 .inode = state->inode,
5109 err = _nfs4_proc_setlk(state, cmd, request);
5110 if (err == -NFS4ERR_DENIED)
5112 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5114 } while (exception.retry);
5119 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5121 struct nfs_open_context *ctx;
5122 struct nfs4_state *state;
5123 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5126 /* verify open state */
5127 ctx = nfs_file_open_context(filp);
5130 if (request->fl_start < 0 || request->fl_end < 0)
5133 if (IS_GETLK(cmd)) {
5135 return nfs4_proc_getlk(state, F_GETLK, request);
5139 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5142 if (request->fl_type == F_UNLCK) {
5144 return nfs4_proc_unlck(state, cmd, request);
5151 * Don't rely on the VFS having checked the file open mode,
5152 * since it won't do this for flock() locks.
5154 switch (request->fl_type) {
5156 if (!(filp->f_mode & FMODE_READ))
5160 if (!(filp->f_mode & FMODE_WRITE))
5165 status = nfs4_proc_setlk(state, cmd, request);
5166 if ((status != -EAGAIN) || IS_SETLK(cmd))
5168 timeout = nfs4_set_lock_task_retry(timeout);
5169 status = -ERESTARTSYS;
5172 } while(status < 0);
5176 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
5178 struct nfs_server *server = NFS_SERVER(state->inode);
5179 struct nfs4_exception exception = { };
5182 err = nfs4_set_lock_state(state, fl);
5186 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5189 printk(KERN_ERR "NFS: %s: unhandled error "
5190 "%d.\n", __func__, err);
5194 case -NFS4ERR_EXPIRED:
5195 nfs4_schedule_stateid_recovery(server, state);
5196 case -NFS4ERR_STALE_CLIENTID:
5197 case -NFS4ERR_STALE_STATEID:
5198 nfs4_schedule_lease_recovery(server->nfs_client);
5200 case -NFS4ERR_BADSESSION:
5201 case -NFS4ERR_BADSLOT:
5202 case -NFS4ERR_BAD_HIGH_SLOT:
5203 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5204 case -NFS4ERR_DEADSESSION:
5205 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
5209 * The show must go on: exit, but mark the
5210 * stateid as needing recovery.
5212 case -NFS4ERR_DELEG_REVOKED:
5213 case -NFS4ERR_ADMIN_REVOKED:
5214 case -NFS4ERR_BAD_STATEID:
5215 case -NFS4ERR_OPENMODE:
5216 nfs4_schedule_stateid_recovery(server, state);
5221 * User RPCSEC_GSS context has expired.
5222 * We cannot recover this stateid now, so
5223 * skip it and allow recovery thread to
5229 case -NFS4ERR_DENIED:
5230 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5233 case -NFS4ERR_DELAY:
5236 err = nfs4_handle_exception(server, err, &exception);
5237 } while (exception.retry);
5242 struct nfs_release_lockowner_data {
5243 struct nfs4_lock_state *lsp;
5244 struct nfs_server *server;
5245 struct nfs_release_lockowner_args args;
5248 static void nfs4_release_lockowner_release(void *calldata)
5250 struct nfs_release_lockowner_data *data = calldata;
5251 nfs4_free_lock_state(data->server, data->lsp);
5255 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5256 .rpc_release = nfs4_release_lockowner_release,
5259 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
5261 struct nfs_server *server = lsp->ls_state->owner->so_server;
5262 struct nfs_release_lockowner_data *data;
5263 struct rpc_message msg = {
5264 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5267 if (server->nfs_client->cl_mvops->minor_version != 0)
5269 data = kmalloc(sizeof(*data), GFP_NOFS);
5273 data->server = server;
5274 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5275 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5276 data->args.lock_owner.s_dev = server->s_dev;
5277 msg.rpc_argp = &data->args;
5278 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5282 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5284 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5285 const void *buf, size_t buflen,
5286 int flags, int type)
5288 if (strcmp(key, "") != 0)
5291 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5294 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5295 void *buf, size_t buflen, int type)
5297 if (strcmp(key, "") != 0)
5300 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5303 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5304 size_t list_len, const char *name,
5305 size_t name_len, int type)
5307 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5309 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5312 if (list && len <= list_len)
5313 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5318 * nfs_fhget will use either the mounted_on_fileid or the fileid
5320 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5322 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5323 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5324 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5325 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5328 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5329 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5330 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5334 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5335 const struct qstr *name,
5336 struct nfs4_fs_locations *fs_locations,
5339 struct nfs_server *server = NFS_SERVER(dir);
5341 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5343 struct nfs4_fs_locations_arg args = {
5344 .dir_fh = NFS_FH(dir),
5349 struct nfs4_fs_locations_res res = {
5350 .fs_locations = fs_locations,
5352 struct rpc_message msg = {
5353 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5359 dprintk("%s: start\n", __func__);
5361 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5362 * is not supported */
5363 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5364 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5366 bitmask[0] |= FATTR4_WORD0_FILEID;
5368 nfs_fattr_init(&fs_locations->fattr);
5369 fs_locations->server = server;
5370 fs_locations->nlocations = 0;
5371 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5372 dprintk("%s: returned status = %d\n", __func__, status);
5376 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5377 const struct qstr *name,
5378 struct nfs4_fs_locations *fs_locations,
5381 struct nfs4_exception exception = { };
5384 err = nfs4_handle_exception(NFS_SERVER(dir),
5385 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5387 } while (exception.retry);
5391 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5394 struct nfs4_secinfo_arg args = {
5395 .dir_fh = NFS_FH(dir),
5398 struct nfs4_secinfo_res res = {
5401 struct rpc_message msg = {
5402 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5407 dprintk("NFS call secinfo %s\n", name->name);
5408 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5409 dprintk("NFS reply secinfo: %d\n", status);
5413 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5414 struct nfs4_secinfo_flavors *flavors)
5416 struct nfs4_exception exception = { };
5419 err = nfs4_handle_exception(NFS_SERVER(dir),
5420 _nfs4_proc_secinfo(dir, name, flavors),
5422 } while (exception.retry);
5426 #ifdef CONFIG_NFS_V4_1
5428 * Check the exchange flags returned by the server for invalid flags, having
5429 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5432 static int nfs4_check_cl_exchange_flags(u32 flags)
5434 if (flags & ~EXCHGID4_FLAG_MASK_R)
5436 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5437 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5439 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5443 return -NFS4ERR_INVAL;
5447 nfs41_same_server_scope(struct nfs41_server_scope *a,
5448 struct nfs41_server_scope *b)
5450 if (a->server_scope_sz == b->server_scope_sz &&
5451 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5458 * nfs4_proc_bind_conn_to_session()
5460 * The 4.1 client currently uses the same TCP connection for the
5461 * fore and backchannel.
5463 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5466 struct nfs41_bind_conn_to_session_res res;
5467 struct rpc_message msg = {
5469 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5475 dprintk("--> %s\n", __func__);
5477 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5478 if (unlikely(res.session == NULL)) {
5483 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5485 if (memcmp(res.session->sess_id.data,
5486 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5487 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5491 if (res.dir != NFS4_CDFS4_BOTH) {
5492 dprintk("NFS: %s: Unexpected direction from server\n",
5497 if (res.use_conn_in_rdma_mode) {
5498 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5507 dprintk("<-- %s status= %d\n", __func__, status);
5512 * nfs4_proc_exchange_id()
5514 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5516 * Since the clientid has expired, all compounds using sessions
5517 * associated with the stale clientid will be returning
5518 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5519 * be in some phase of session reset.
5521 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5523 nfs4_verifier verifier;
5524 struct nfs41_exchange_id_args args = {
5525 .verifier = &verifier,
5527 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5529 struct nfs41_exchange_id_res res = {
5533 struct rpc_message msg = {
5534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5540 nfs4_init_boot_verifier(clp, &verifier);
5541 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5543 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5544 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5545 args.id_len, args.id);
5547 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5549 if (unlikely(res.server_owner == NULL)) {
5554 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5556 if (unlikely(res.server_scope == NULL)) {
5558 goto out_server_owner;
5561 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5562 if (unlikely(res.impl_id == NULL)) {
5564 goto out_server_scope;
5567 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5569 status = nfs4_check_cl_exchange_flags(res.flags);
5572 clp->cl_clientid = res.clientid;
5573 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5574 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5575 clp->cl_seqid = res.seqid;
5577 kfree(clp->cl_serverowner);
5578 clp->cl_serverowner = res.server_owner;
5579 res.server_owner = NULL;
5581 /* use the most recent implementation id */
5582 kfree(clp->cl_implid);
5583 clp->cl_implid = res.impl_id;
5585 if (clp->cl_serverscope != NULL &&
5586 !nfs41_same_server_scope(clp->cl_serverscope,
5587 res.server_scope)) {
5588 dprintk("%s: server_scope mismatch detected\n",
5590 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5591 kfree(clp->cl_serverscope);
5592 clp->cl_serverscope = NULL;
5595 if (clp->cl_serverscope == NULL) {
5596 clp->cl_serverscope = res.server_scope;
5603 kfree(res.server_owner);
5605 kfree(res.server_scope);
5607 if (clp->cl_implid != NULL)
5608 dprintk("NFS reply exchange_id: Server Implementation ID: "
5609 "domain: %s, name: %s, date: %llu,%u\n",
5610 clp->cl_implid->domain, clp->cl_implid->name,
5611 clp->cl_implid->date.seconds,
5612 clp->cl_implid->date.nseconds);
5613 dprintk("NFS reply exchange_id: %d\n", status);
5617 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5618 struct rpc_cred *cred)
5620 struct rpc_message msg = {
5621 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5627 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5629 dprintk("NFS: Got error %d from the server %s on "
5630 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5634 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5635 struct rpc_cred *cred)
5640 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5641 ret = _nfs4_proc_destroy_clientid(clp, cred);
5643 case -NFS4ERR_DELAY:
5644 case -NFS4ERR_CLIENTID_BUSY:
5654 int nfs4_destroy_clientid(struct nfs_client *clp)
5656 struct rpc_cred *cred;
5659 if (clp->cl_mvops->minor_version < 1)
5661 if (clp->cl_exchange_flags == 0)
5663 if (clp->cl_preserve_clid)
5665 cred = nfs4_get_exchange_id_cred(clp);
5666 ret = nfs4_proc_destroy_clientid(clp, cred);
5671 case -NFS4ERR_STALE_CLIENTID:
5672 clp->cl_exchange_flags = 0;
5678 struct nfs4_get_lease_time_data {
5679 struct nfs4_get_lease_time_args *args;
5680 struct nfs4_get_lease_time_res *res;
5681 struct nfs_client *clp;
5684 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5688 struct nfs4_get_lease_time_data *data =
5689 (struct nfs4_get_lease_time_data *)calldata;
5691 dprintk("--> %s\n", __func__);
5692 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5693 /* just setup sequence, do not trigger session recovery
5694 since we're invoked within one */
5695 ret = nfs41_setup_sequence(data->clp->cl_session,
5696 &data->args->la_seq_args,
5697 &data->res->lr_seq_res, task);
5700 rpc_call_start(task);
5701 dprintk("<-- %s\n", __func__);
5705 * Called from nfs4_state_manager thread for session setup, so don't recover
5706 * from sequence operation or clientid errors.
5708 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5710 struct nfs4_get_lease_time_data *data =
5711 (struct nfs4_get_lease_time_data *)calldata;
5713 dprintk("--> %s\n", __func__);
5714 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5716 switch (task->tk_status) {
5717 case -NFS4ERR_DELAY:
5718 case -NFS4ERR_GRACE:
5719 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5720 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5721 task->tk_status = 0;
5723 case -NFS4ERR_RETRY_UNCACHED_REP:
5724 rpc_restart_call_prepare(task);
5727 dprintk("<-- %s\n", __func__);
5730 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5731 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5732 .rpc_call_done = nfs4_get_lease_time_done,
5735 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5737 struct rpc_task *task;
5738 struct nfs4_get_lease_time_args args;
5739 struct nfs4_get_lease_time_res res = {
5740 .lr_fsinfo = fsinfo,
5742 struct nfs4_get_lease_time_data data = {
5747 struct rpc_message msg = {
5748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5752 struct rpc_task_setup task_setup = {
5753 .rpc_client = clp->cl_rpcclient,
5754 .rpc_message = &msg,
5755 .callback_ops = &nfs4_get_lease_time_ops,
5756 .callback_data = &data,
5757 .flags = RPC_TASK_TIMEOUT,
5761 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5762 dprintk("--> %s\n", __func__);
5763 task = rpc_run_task(&task_setup);
5766 status = PTR_ERR(task);
5768 status = task->tk_status;
5771 dprintk("<-- %s return %d\n", __func__, status);
5776 static int nfs4_grow_slot_table(struct nfs4_slot_table *tbl,
5777 u32 max_reqs, u32 ivalue)
5779 if (max_reqs <= tbl->max_slots)
5781 if (nfs4_find_or_create_slot(tbl, max_reqs - 1, ivalue, GFP_NOFS))
5786 static void nfs4_reset_slot_table(struct nfs4_slot_table *tbl,
5787 u32 server_highest_slotid,
5790 struct nfs4_slot **p;
5792 nfs4_shrink_slot_table(tbl, server_highest_slotid + 1);
5795 (*p)->seq_nr = ivalue;
5798 tbl->highest_used_slotid = NFS4_NO_SLOT;
5799 tbl->target_highest_slotid = server_highest_slotid;
5800 tbl->server_highest_slotid = server_highest_slotid;
5801 tbl->max_slotid = server_highest_slotid;
5805 * (re)Initialise a slot table
5807 static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl,
5808 u32 max_reqs, u32 ivalue)
5812 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5813 max_reqs, tbl->max_slots);
5815 if (max_reqs > NFS4_MAX_SLOT_TABLE)
5816 max_reqs = NFS4_MAX_SLOT_TABLE;
5818 ret = nfs4_grow_slot_table(tbl, max_reqs, ivalue);
5822 spin_lock(&tbl->slot_tbl_lock);
5823 nfs4_reset_slot_table(tbl, max_reqs - 1, ivalue);
5824 spin_unlock(&tbl->slot_tbl_lock);
5826 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5827 tbl, tbl->slots, tbl->max_slots);
5829 dprintk("<-- %s: return %d\n", __func__, ret);
5833 int nfs4_resize_slot_table(struct nfs4_slot_table *tbl,
5834 u32 max_reqs, u32 ivalue)
5838 if (max_reqs > NFS4_MAX_SLOT_TABLE)
5839 max_reqs = NFS4_MAX_SLOT_TABLE;
5840 ret = nfs4_grow_slot_table(tbl, max_reqs, ivalue);
5843 spin_lock(&tbl->slot_tbl_lock);
5844 nfs4_shrink_slot_table(tbl, max_reqs);
5845 tbl->max_slotid = max_reqs - 1;
5846 spin_unlock(&tbl->slot_tbl_lock);
5850 /* Destroy the slot table */
5851 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5853 nfs4_shrink_slot_table(&session->fc_slot_table, 0);
5854 nfs4_shrink_slot_table(&session->bc_slot_table, 0);
5858 * Initialize or reset the forechannel and backchannel tables
5860 static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5862 struct nfs4_slot_table *tbl;
5865 dprintk("--> %s\n", __func__);
5867 tbl = &ses->fc_slot_table;
5869 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5870 if (status) /* -ENOMEM */
5873 tbl = &ses->bc_slot_table;
5875 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5876 if (status && tbl->slots == NULL)
5877 /* Fore and back channel share a connection so get
5878 * both slot tables or neither */
5879 nfs4_destroy_slot_tables(ses);
5883 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5885 struct nfs4_session *session;
5886 struct nfs4_slot_table *tbl;
5888 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5892 tbl = &session->fc_slot_table;
5893 tbl->highest_used_slotid = NFS4_NO_SLOT;
5894 spin_lock_init(&tbl->slot_tbl_lock);
5895 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5896 init_completion(&tbl->complete);
5898 tbl = &session->bc_slot_table;
5899 tbl->highest_used_slotid = NFS4_NO_SLOT;
5900 spin_lock_init(&tbl->slot_tbl_lock);
5901 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5902 init_completion(&tbl->complete);
5904 session->session_state = 1<<NFS4_SESSION_INITING;
5910 void nfs4_destroy_session(struct nfs4_session *session)
5912 struct rpc_xprt *xprt;
5913 struct rpc_cred *cred;
5915 cred = nfs4_get_exchange_id_cred(session->clp);
5916 nfs4_proc_destroy_session(session, cred);
5921 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5923 dprintk("%s Destroy backchannel for xprt %p\n",
5925 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5926 nfs4_destroy_slot_tables(session);
5931 * Initialize the values to be used by the client in CREATE_SESSION
5932 * If nfs4_init_session set the fore channel request and response sizes,
5935 * Set the back channel max_resp_sz_cached to zero to force the client to
5936 * always set csa_cachethis to FALSE because the current implementation
5937 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5939 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5941 struct nfs4_session *session = args->client->cl_session;
5942 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5943 mxresp_sz = session->fc_target_max_resp_sz;
5946 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5948 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5949 /* Fore channel attributes */
5950 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5951 args->fc_attrs.max_resp_sz = mxresp_sz;
5952 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5953 args->fc_attrs.max_reqs = max_session_slots;
5955 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5956 "max_ops=%u max_reqs=%u\n",
5958 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5959 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5961 /* Back channel attributes */
5962 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5963 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5964 args->bc_attrs.max_resp_sz_cached = 0;
5965 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5966 args->bc_attrs.max_reqs = 1;
5968 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5969 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5971 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5972 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5973 args->bc_attrs.max_reqs);
5976 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5978 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5979 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5981 if (rcvd->max_resp_sz > sent->max_resp_sz)
5984 * Our requested max_ops is the minimum we need; we're not
5985 * prepared to break up compounds into smaller pieces than that.
5986 * So, no point even trying to continue if the server won't
5989 if (rcvd->max_ops < sent->max_ops)
5991 if (rcvd->max_reqs == 0)
5993 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5994 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5998 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6000 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6001 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
6003 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6005 if (rcvd->max_resp_sz < sent->max_resp_sz)
6007 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6009 /* These would render the backchannel useless: */
6010 if (rcvd->max_ops != sent->max_ops)
6012 if (rcvd->max_reqs != sent->max_reqs)
6017 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6018 struct nfs4_session *session)
6022 ret = nfs4_verify_fore_channel_attrs(args, session);
6025 return nfs4_verify_back_channel_attrs(args, session);
6028 static int _nfs4_proc_create_session(struct nfs_client *clp,
6029 struct rpc_cred *cred)
6031 struct nfs4_session *session = clp->cl_session;
6032 struct nfs41_create_session_args args = {
6034 .cb_program = NFS4_CALLBACK,
6036 struct nfs41_create_session_res res = {
6039 struct rpc_message msg = {
6040 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6047 nfs4_init_channel_attrs(&args);
6048 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
6050 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6053 /* Verify the session's negotiated channel_attrs values */
6054 status = nfs4_verify_channel_attrs(&args, session);
6055 /* Increment the clientid slot sequence id */
6063 * Issues a CREATE_SESSION operation to the server.
6064 * It is the responsibility of the caller to verify the session is
6065 * expired before calling this routine.
6067 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
6071 struct nfs4_session *session = clp->cl_session;
6073 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6075 status = _nfs4_proc_create_session(clp, cred);
6079 /* Init or reset the session slot tables */
6080 status = nfs4_setup_session_slot_tables(session);
6081 dprintk("slot table setup returned %d\n", status);
6085 ptr = (unsigned *)&session->sess_id.data[0];
6086 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6087 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
6089 dprintk("<-- %s\n", __func__);
6094 * Issue the over-the-wire RPC DESTROY_SESSION.
6095 * The caller must serialize access to this routine.
6097 int nfs4_proc_destroy_session(struct nfs4_session *session,
6098 struct rpc_cred *cred)
6100 struct rpc_message msg = {
6101 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6102 .rpc_argp = session,
6107 dprintk("--> nfs4_proc_destroy_session\n");
6109 /* session is still being setup */
6110 if (session->clp->cl_cons_state != NFS_CS_READY)
6113 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6116 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
6117 "Session has been destroyed regardless...\n", status);
6119 dprintk("<-- nfs4_proc_destroy_session\n");
6124 * With sessions, the client is not marked ready until after a
6125 * successful EXCHANGE_ID and CREATE_SESSION.
6127 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
6128 * other versions of NFS can be tried.
6130 static int nfs41_check_session_ready(struct nfs_client *clp)
6134 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
6135 ret = nfs4_client_recover_expired_lease(clp);
6139 if (clp->cl_cons_state < NFS_CS_READY)
6140 return -EPROTONOSUPPORT;
6145 int nfs4_init_session(struct nfs_server *server)
6147 struct nfs_client *clp = server->nfs_client;
6148 struct nfs4_session *session;
6149 unsigned int target_max_rqst_sz = NFS_MAX_FILE_IO_SIZE;
6150 unsigned int target_max_resp_sz = NFS_MAX_FILE_IO_SIZE;
6152 if (!nfs4_has_session(clp))
6155 if (server->rsize != 0)
6156 target_max_resp_sz = server->rsize;
6157 target_max_resp_sz += nfs41_maxread_overhead;
6159 if (server->wsize != 0)
6160 target_max_rqst_sz = server->wsize;
6161 target_max_rqst_sz += nfs41_maxwrite_overhead;
6163 session = clp->cl_session;
6164 spin_lock(&clp->cl_lock);
6165 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
6166 /* Initialise targets and channel attributes */
6167 session->fc_target_max_rqst_sz = target_max_rqst_sz;
6168 session->fc_attrs.max_rqst_sz = target_max_rqst_sz;
6169 session->fc_target_max_resp_sz = target_max_resp_sz;
6170 session->fc_attrs.max_resp_sz = target_max_resp_sz;
6172 /* Just adjust the targets */
6173 if (target_max_rqst_sz > session->fc_target_max_rqst_sz) {
6174 session->fc_target_max_rqst_sz = target_max_rqst_sz;
6175 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
6177 if (target_max_resp_sz > session->fc_target_max_resp_sz) {
6178 session->fc_target_max_resp_sz = target_max_resp_sz;
6179 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
6182 spin_unlock(&clp->cl_lock);
6184 if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
6185 nfs4_schedule_lease_recovery(clp);
6187 return nfs41_check_session_ready(clp);
6190 int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
6192 struct nfs4_session *session = clp->cl_session;
6195 spin_lock(&clp->cl_lock);
6196 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
6198 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
6199 * DS lease to be equal to the MDS lease.
6201 clp->cl_lease_time = lease_time;
6202 clp->cl_last_renewal = jiffies;
6204 spin_unlock(&clp->cl_lock);
6206 ret = nfs41_check_session_ready(clp);
6209 /* Test for the DS role */
6210 if (!is_ds_client(clp))
6214 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
6218 * Renew the cl_session lease.
6220 struct nfs4_sequence_data {
6221 struct nfs_client *clp;
6222 struct nfs4_sequence_args args;
6223 struct nfs4_sequence_res res;
6226 static void nfs41_sequence_release(void *data)
6228 struct nfs4_sequence_data *calldata = data;
6229 struct nfs_client *clp = calldata->clp;
6231 if (atomic_read(&clp->cl_count) > 1)
6232 nfs4_schedule_state_renewal(clp);
6233 nfs_put_client(clp);
6237 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6239 switch(task->tk_status) {
6240 case -NFS4ERR_DELAY:
6241 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6244 nfs4_schedule_lease_recovery(clp);
6249 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
6251 struct nfs4_sequence_data *calldata = data;
6252 struct nfs_client *clp = calldata->clp;
6254 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6257 if (task->tk_status < 0) {
6258 dprintk("%s ERROR %d\n", __func__, task->tk_status);
6259 if (atomic_read(&clp->cl_count) == 1)
6262 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6263 rpc_restart_call_prepare(task);
6267 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
6269 dprintk("<-- %s\n", __func__);
6272 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6274 struct nfs4_sequence_data *calldata = data;
6275 struct nfs_client *clp = calldata->clp;
6276 struct nfs4_sequence_args *args;
6277 struct nfs4_sequence_res *res;
6279 args = task->tk_msg.rpc_argp;
6280 res = task->tk_msg.rpc_resp;
6282 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
6284 rpc_call_start(task);
6287 static void nfs41_sequence_prepare_privileged(struct rpc_task *task, void *data)
6289 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
6290 nfs41_sequence_prepare(task, data);
6293 static const struct rpc_call_ops nfs41_sequence_ops = {
6294 .rpc_call_done = nfs41_sequence_call_done,
6295 .rpc_call_prepare = nfs41_sequence_prepare,
6296 .rpc_release = nfs41_sequence_release,
6299 static const struct rpc_call_ops nfs41_sequence_privileged_ops = {
6300 .rpc_call_done = nfs41_sequence_call_done,
6301 .rpc_call_prepare = nfs41_sequence_prepare_privileged,
6302 .rpc_release = nfs41_sequence_release,
6305 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred,
6306 const struct rpc_call_ops *seq_ops)
6308 struct nfs4_sequence_data *calldata;
6309 struct rpc_message msg = {
6310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6313 struct rpc_task_setup task_setup_data = {
6314 .rpc_client = clp->cl_rpcclient,
6315 .rpc_message = &msg,
6316 .callback_ops = seq_ops,
6317 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6320 if (!atomic_inc_not_zero(&clp->cl_count))
6321 return ERR_PTR(-EIO);
6322 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6323 if (calldata == NULL) {
6324 nfs_put_client(clp);
6325 return ERR_PTR(-ENOMEM);
6327 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
6328 msg.rpc_argp = &calldata->args;
6329 msg.rpc_resp = &calldata->res;
6330 calldata->clp = clp;
6331 task_setup_data.callback_data = calldata;
6333 return rpc_run_task(&task_setup_data);
6336 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
6338 struct rpc_task *task;
6341 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6343 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_ops);
6345 ret = PTR_ERR(task);
6347 rpc_put_task_async(task);
6348 dprintk("<-- %s status=%d\n", __func__, ret);
6352 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6354 struct rpc_task *task;
6357 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_privileged_ops);
6359 ret = PTR_ERR(task);
6362 ret = rpc_wait_for_completion_task(task);
6364 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6366 if (task->tk_status == 0)
6367 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
6368 ret = task->tk_status;
6372 dprintk("<-- %s status=%d\n", __func__, ret);
6376 struct nfs4_reclaim_complete_data {
6377 struct nfs_client *clp;
6378 struct nfs41_reclaim_complete_args arg;
6379 struct nfs41_reclaim_complete_res res;
6382 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6384 struct nfs4_reclaim_complete_data *calldata = data;
6386 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
6387 if (nfs41_setup_sequence(calldata->clp->cl_session,
6388 &calldata->arg.seq_args,
6389 &calldata->res.seq_res, task))
6392 rpc_call_start(task);
6395 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6397 switch(task->tk_status) {
6399 case -NFS4ERR_COMPLETE_ALREADY:
6400 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6402 case -NFS4ERR_DELAY:
6403 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6405 case -NFS4ERR_RETRY_UNCACHED_REP:
6408 nfs4_schedule_lease_recovery(clp);
6413 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6415 struct nfs4_reclaim_complete_data *calldata = data;
6416 struct nfs_client *clp = calldata->clp;
6417 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6419 dprintk("--> %s\n", __func__);
6420 if (!nfs41_sequence_done(task, res))
6423 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6424 rpc_restart_call_prepare(task);
6427 dprintk("<-- %s\n", __func__);
6430 static void nfs4_free_reclaim_complete_data(void *data)
6432 struct nfs4_reclaim_complete_data *calldata = data;
6437 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6438 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6439 .rpc_call_done = nfs4_reclaim_complete_done,
6440 .rpc_release = nfs4_free_reclaim_complete_data,
6444 * Issue a global reclaim complete.
6446 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6448 struct nfs4_reclaim_complete_data *calldata;
6449 struct rpc_task *task;
6450 struct rpc_message msg = {
6451 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6453 struct rpc_task_setup task_setup_data = {
6454 .rpc_client = clp->cl_rpcclient,
6455 .rpc_message = &msg,
6456 .callback_ops = &nfs4_reclaim_complete_call_ops,
6457 .flags = RPC_TASK_ASYNC,
6459 int status = -ENOMEM;
6461 dprintk("--> %s\n", __func__);
6462 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6463 if (calldata == NULL)
6465 calldata->clp = clp;
6466 calldata->arg.one_fs = 0;
6468 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6469 msg.rpc_argp = &calldata->arg;
6470 msg.rpc_resp = &calldata->res;
6471 task_setup_data.callback_data = calldata;
6472 task = rpc_run_task(&task_setup_data);
6474 status = PTR_ERR(task);
6477 status = nfs4_wait_for_completion_rpc_task(task);
6479 status = task->tk_status;
6483 dprintk("<-- %s status=%d\n", __func__, status);
6488 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6490 struct nfs4_layoutget *lgp = calldata;
6491 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6493 dprintk("--> %s\n", __func__);
6494 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6495 * right now covering the LAYOUTGET we are about to send.
6496 * However, that is not so catastrophic, and there seems
6497 * to be no way to prevent it completely.
6499 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
6500 &lgp->res.seq_res, task))
6502 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6503 NFS_I(lgp->args.inode)->layout,
6504 lgp->args.ctx->state)) {
6505 rpc_exit(task, NFS4_OK);
6508 rpc_call_start(task);
6511 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6513 struct nfs4_layoutget *lgp = calldata;
6514 struct inode *inode = lgp->args.inode;
6515 struct nfs_server *server = NFS_SERVER(inode);
6516 struct pnfs_layout_hdr *lo;
6517 struct nfs4_state *state = NULL;
6519 dprintk("--> %s\n", __func__);
6521 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6524 switch (task->tk_status) {
6527 case -NFS4ERR_LAYOUTTRYLATER:
6528 case -NFS4ERR_RECALLCONFLICT:
6529 task->tk_status = -NFS4ERR_DELAY;
6531 case -NFS4ERR_EXPIRED:
6532 case -NFS4ERR_BAD_STATEID:
6533 spin_lock(&inode->i_lock);
6534 lo = NFS_I(inode)->layout;
6535 if (!lo || list_empty(&lo->plh_segs)) {
6536 spin_unlock(&inode->i_lock);
6537 /* If the open stateid was bad, then recover it. */
6538 state = lgp->args.ctx->state;
6542 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6543 spin_unlock(&inode->i_lock);
6544 /* Mark the bad layout state as invalid, then
6545 * retry using the open stateid. */
6546 pnfs_free_lseg_list(&head);
6549 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6550 rpc_restart_call_prepare(task);
6552 dprintk("<-- %s\n", __func__);
6555 static size_t max_response_pages(struct nfs_server *server)
6557 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6558 return nfs_page_array_len(0, max_resp_sz);
6561 static void nfs4_free_pages(struct page **pages, size_t size)
6568 for (i = 0; i < size; i++) {
6571 __free_page(pages[i]);
6576 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6578 struct page **pages;
6581 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6583 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6587 for (i = 0; i < size; i++) {
6588 pages[i] = alloc_page(gfp_flags);
6590 dprintk("%s: failed to allocate page\n", __func__);
6591 nfs4_free_pages(pages, size);
6599 static void nfs4_layoutget_release(void *calldata)
6601 struct nfs4_layoutget *lgp = calldata;
6602 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6603 size_t max_pages = max_response_pages(server);
6605 dprintk("--> %s\n", __func__);
6606 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6607 put_nfs_open_context(lgp->args.ctx);
6609 dprintk("<-- %s\n", __func__);
6612 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6613 .rpc_call_prepare = nfs4_layoutget_prepare,
6614 .rpc_call_done = nfs4_layoutget_done,
6615 .rpc_release = nfs4_layoutget_release,
6618 struct pnfs_layout_segment *
6619 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6621 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6622 size_t max_pages = max_response_pages(server);
6623 struct rpc_task *task;
6624 struct rpc_message msg = {
6625 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6626 .rpc_argp = &lgp->args,
6627 .rpc_resp = &lgp->res,
6629 struct rpc_task_setup task_setup_data = {
6630 .rpc_client = server->client,
6631 .rpc_message = &msg,
6632 .callback_ops = &nfs4_layoutget_call_ops,
6633 .callback_data = lgp,
6634 .flags = RPC_TASK_ASYNC,
6636 struct pnfs_layout_segment *lseg = NULL;
6639 dprintk("--> %s\n", __func__);
6641 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6642 if (!lgp->args.layout.pages) {
6643 nfs4_layoutget_release(lgp);
6644 return ERR_PTR(-ENOMEM);
6646 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6648 lgp->res.layoutp = &lgp->args.layout;
6649 lgp->res.seq_res.sr_slot = NULL;
6650 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6651 task = rpc_run_task(&task_setup_data);
6653 return ERR_CAST(task);
6654 status = nfs4_wait_for_completion_rpc_task(task);
6656 status = task->tk_status;
6658 lseg = pnfs_layout_process(lgp);
6660 dprintk("<-- %s status=%d\n", __func__, status);
6662 return ERR_PTR(status);
6667 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6669 struct nfs4_layoutreturn *lrp = calldata;
6671 dprintk("--> %s\n", __func__);
6672 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
6673 &lrp->res.seq_res, task))
6675 rpc_call_start(task);
6678 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6680 struct nfs4_layoutreturn *lrp = calldata;
6681 struct nfs_server *server;
6683 dprintk("--> %s\n", __func__);
6685 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6688 server = NFS_SERVER(lrp->args.inode);
6689 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6690 rpc_restart_call_prepare(task);
6693 dprintk("<-- %s\n", __func__);
6696 static void nfs4_layoutreturn_release(void *calldata)
6698 struct nfs4_layoutreturn *lrp = calldata;
6699 struct pnfs_layout_hdr *lo = lrp->args.layout;
6701 dprintk("--> %s\n", __func__);
6702 spin_lock(&lo->plh_inode->i_lock);
6703 if (lrp->res.lrs_present)
6704 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6705 lo->plh_block_lgets--;
6706 spin_unlock(&lo->plh_inode->i_lock);
6707 pnfs_put_layout_hdr(lrp->args.layout);
6709 dprintk("<-- %s\n", __func__);
6712 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6713 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6714 .rpc_call_done = nfs4_layoutreturn_done,
6715 .rpc_release = nfs4_layoutreturn_release,
6718 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6720 struct rpc_task *task;
6721 struct rpc_message msg = {
6722 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6723 .rpc_argp = &lrp->args,
6724 .rpc_resp = &lrp->res,
6726 struct rpc_task_setup task_setup_data = {
6727 .rpc_client = lrp->clp->cl_rpcclient,
6728 .rpc_message = &msg,
6729 .callback_ops = &nfs4_layoutreturn_call_ops,
6730 .callback_data = lrp,
6734 dprintk("--> %s\n", __func__);
6735 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6736 task = rpc_run_task(&task_setup_data);
6738 return PTR_ERR(task);
6739 status = task->tk_status;
6740 dprintk("<-- %s status=%d\n", __func__, status);
6746 * Retrieve the list of Data Server devices from the MDS.
6748 static int _nfs4_getdevicelist(struct nfs_server *server,
6749 const struct nfs_fh *fh,
6750 struct pnfs_devicelist *devlist)
6752 struct nfs4_getdevicelist_args args = {
6754 .layoutclass = server->pnfs_curr_ld->id,
6756 struct nfs4_getdevicelist_res res = {
6759 struct rpc_message msg = {
6760 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6766 dprintk("--> %s\n", __func__);
6767 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6769 dprintk("<-- %s status=%d\n", __func__, status);
6773 int nfs4_proc_getdevicelist(struct nfs_server *server,
6774 const struct nfs_fh *fh,
6775 struct pnfs_devicelist *devlist)
6777 struct nfs4_exception exception = { };
6781 err = nfs4_handle_exception(server,
6782 _nfs4_getdevicelist(server, fh, devlist),
6784 } while (exception.retry);
6786 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6787 err, devlist->num_devs);
6791 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6794 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6796 struct nfs4_getdeviceinfo_args args = {
6799 struct nfs4_getdeviceinfo_res res = {
6802 struct rpc_message msg = {
6803 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6809 dprintk("--> %s\n", __func__);
6810 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6811 dprintk("<-- %s status=%d\n", __func__, status);
6816 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6818 struct nfs4_exception exception = { };
6822 err = nfs4_handle_exception(server,
6823 _nfs4_proc_getdeviceinfo(server, pdev),
6825 } while (exception.retry);
6828 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6830 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6832 struct nfs4_layoutcommit_data *data = calldata;
6833 struct nfs_server *server = NFS_SERVER(data->args.inode);
6835 if (nfs4_setup_sequence(server, &data->args.seq_args,
6836 &data->res.seq_res, task))
6838 rpc_call_start(task);
6842 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6844 struct nfs4_layoutcommit_data *data = calldata;
6845 struct nfs_server *server = NFS_SERVER(data->args.inode);
6847 if (!nfs4_sequence_done(task, &data->res.seq_res))
6850 switch (task->tk_status) { /* Just ignore these failures */
6851 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6852 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6853 case -NFS4ERR_BADLAYOUT: /* no layout */
6854 case -NFS4ERR_GRACE: /* loca_recalim always false */
6855 task->tk_status = 0;
6858 nfs_post_op_update_inode_force_wcc(data->args.inode,
6862 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6863 rpc_restart_call_prepare(task);
6869 static void nfs4_layoutcommit_release(void *calldata)
6871 struct nfs4_layoutcommit_data *data = calldata;
6872 struct pnfs_layout_segment *lseg, *tmp;
6873 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6875 pnfs_cleanup_layoutcommit(data);
6876 /* Matched by references in pnfs_set_layoutcommit */
6877 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6878 list_del_init(&lseg->pls_lc_list);
6879 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6881 pnfs_put_lseg(lseg);
6884 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6885 smp_mb__after_clear_bit();
6886 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6888 put_rpccred(data->cred);
6892 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6893 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6894 .rpc_call_done = nfs4_layoutcommit_done,
6895 .rpc_release = nfs4_layoutcommit_release,
6899 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6901 struct rpc_message msg = {
6902 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6903 .rpc_argp = &data->args,
6904 .rpc_resp = &data->res,
6905 .rpc_cred = data->cred,
6907 struct rpc_task_setup task_setup_data = {
6908 .task = &data->task,
6909 .rpc_client = NFS_CLIENT(data->args.inode),
6910 .rpc_message = &msg,
6911 .callback_ops = &nfs4_layoutcommit_ops,
6912 .callback_data = data,
6913 .flags = RPC_TASK_ASYNC,
6915 struct rpc_task *task;
6918 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6919 "lbw: %llu inode %lu\n",
6920 data->task.tk_pid, sync,
6921 data->args.lastbytewritten,
6922 data->args.inode->i_ino);
6924 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6925 task = rpc_run_task(&task_setup_data);
6927 return PTR_ERR(task);
6930 status = nfs4_wait_for_completion_rpc_task(task);
6933 status = task->tk_status;
6935 dprintk("%s: status %d\n", __func__, status);
6941 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6942 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6944 struct nfs41_secinfo_no_name_args args = {
6945 .style = SECINFO_STYLE_CURRENT_FH,
6947 struct nfs4_secinfo_res res = {
6950 struct rpc_message msg = {
6951 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6955 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6959 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6960 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6962 struct nfs4_exception exception = { };
6965 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6968 case -NFS4ERR_WRONGSEC:
6969 case -NFS4ERR_NOTSUPP:
6972 err = nfs4_handle_exception(server, err, &exception);
6974 } while (exception.retry);
6980 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6981 struct nfs_fsinfo *info)
6985 rpc_authflavor_t flavor;
6986 struct nfs4_secinfo_flavors *flavors;
6988 page = alloc_page(GFP_KERNEL);
6994 flavors = page_address(page);
6995 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6998 * Fall back on "guess and check" method if
6999 * the server doesn't support SECINFO_NO_NAME
7001 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7002 err = nfs4_find_root_sec(server, fhandle, info);
7008 flavor = nfs_find_best_sec(flavors);
7010 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
7020 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7023 struct nfs41_test_stateid_args args = {
7026 struct nfs41_test_stateid_res res;
7027 struct rpc_message msg = {
7028 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7033 dprintk("NFS call test_stateid %p\n", stateid);
7034 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
7035 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
7036 if (status != NFS_OK) {
7037 dprintk("NFS reply test_stateid: failed, %d\n", status);
7040 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
7045 * nfs41_test_stateid - perform a TEST_STATEID operation
7047 * @server: server / transport on which to perform the operation
7048 * @stateid: state ID to test
7050 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7051 * Otherwise a negative NFS4ERR value is returned if the operation
7052 * failed or the state ID is not currently valid.
7054 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7056 struct nfs4_exception exception = { };
7059 err = _nfs41_test_stateid(server, stateid);
7060 if (err != -NFS4ERR_DELAY)
7062 nfs4_handle_exception(server, err, &exception);
7063 } while (exception.retry);
7067 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7069 struct nfs41_free_stateid_args args = {
7072 struct nfs41_free_stateid_res res;
7073 struct rpc_message msg = {
7074 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
7080 dprintk("NFS call free_stateid %p\n", stateid);
7081 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
7082 status = nfs4_call_sync_sequence(server->client, server, &msg,
7083 &args.seq_args, &res.seq_res, 1);
7084 dprintk("NFS reply free_stateid: %d\n", status);
7089 * nfs41_free_stateid - perform a FREE_STATEID operation
7091 * @server: server / transport on which to perform the operation
7092 * @stateid: state ID to release
7094 * Returns NFS_OK if the server freed "stateid". Otherwise a
7095 * negative NFS4ERR value is returned.
7097 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7099 struct nfs4_exception exception = { };
7102 err = _nfs4_free_stateid(server, stateid);
7103 if (err != -NFS4ERR_DELAY)
7105 nfs4_handle_exception(server, err, &exception);
7106 } while (exception.retry);
7110 static bool nfs41_match_stateid(const nfs4_stateid *s1,
7111 const nfs4_stateid *s2)
7113 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
7116 if (s1->seqid == s2->seqid)
7118 if (s1->seqid == 0 || s2->seqid == 0)
7124 #endif /* CONFIG_NFS_V4_1 */
7126 static bool nfs4_match_stateid(const nfs4_stateid *s1,
7127 const nfs4_stateid *s2)
7129 return nfs4_stateid_match(s1, s2);
7133 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7134 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7135 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7136 .recover_open = nfs4_open_reclaim,
7137 .recover_lock = nfs4_lock_reclaim,
7138 .establish_clid = nfs4_init_clientid,
7139 .get_clid_cred = nfs4_get_setclientid_cred,
7140 .detect_trunking = nfs40_discover_server_trunking,
7143 #if defined(CONFIG_NFS_V4_1)
7144 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
7145 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7146 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7147 .recover_open = nfs4_open_reclaim,
7148 .recover_lock = nfs4_lock_reclaim,
7149 .establish_clid = nfs41_init_clientid,
7150 .get_clid_cred = nfs4_get_exchange_id_cred,
7151 .reclaim_complete = nfs41_proc_reclaim_complete,
7152 .detect_trunking = nfs41_discover_server_trunking,
7154 #endif /* CONFIG_NFS_V4_1 */
7156 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
7157 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7158 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7159 .recover_open = nfs4_open_expired,
7160 .recover_lock = nfs4_lock_expired,
7161 .establish_clid = nfs4_init_clientid,
7162 .get_clid_cred = nfs4_get_setclientid_cred,
7165 #if defined(CONFIG_NFS_V4_1)
7166 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7167 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7168 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7169 .recover_open = nfs41_open_expired,
7170 .recover_lock = nfs41_lock_expired,
7171 .establish_clid = nfs41_init_clientid,
7172 .get_clid_cred = nfs4_get_exchange_id_cred,
7174 #endif /* CONFIG_NFS_V4_1 */
7176 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
7177 .sched_state_renewal = nfs4_proc_async_renew,
7178 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
7179 .renew_lease = nfs4_proc_renew,
7182 #if defined(CONFIG_NFS_V4_1)
7183 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
7184 .sched_state_renewal = nfs41_proc_async_sequence,
7185 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
7186 .renew_lease = nfs4_proc_sequence,
7190 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7192 .call_sync = _nfs4_call_sync,
7193 .match_stateid = nfs4_match_stateid,
7194 .find_root_sec = nfs4_find_root_sec,
7195 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7196 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7197 .state_renewal_ops = &nfs40_state_renewal_ops,
7200 #if defined(CONFIG_NFS_V4_1)
7201 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7203 .call_sync = _nfs4_call_sync_session,
7204 .match_stateid = nfs41_match_stateid,
7205 .find_root_sec = nfs41_find_root_sec,
7206 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7207 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7208 .state_renewal_ops = &nfs41_state_renewal_ops,
7212 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7213 [0] = &nfs_v4_0_minor_ops,
7214 #if defined(CONFIG_NFS_V4_1)
7215 [1] = &nfs_v4_1_minor_ops,
7219 const struct inode_operations nfs4_dir_inode_operations = {
7220 .create = nfs_create,
7221 .lookup = nfs_lookup,
7222 .atomic_open = nfs_atomic_open,
7224 .unlink = nfs_unlink,
7225 .symlink = nfs_symlink,
7229 .rename = nfs_rename,
7230 .permission = nfs_permission,
7231 .getattr = nfs_getattr,
7232 .setattr = nfs_setattr,
7233 .getxattr = generic_getxattr,
7234 .setxattr = generic_setxattr,
7235 .listxattr = generic_listxattr,
7236 .removexattr = generic_removexattr,
7239 static const struct inode_operations nfs4_file_inode_operations = {
7240 .permission = nfs_permission,
7241 .getattr = nfs_getattr,
7242 .setattr = nfs_setattr,
7243 .getxattr = generic_getxattr,
7244 .setxattr = generic_setxattr,
7245 .listxattr = generic_listxattr,
7246 .removexattr = generic_removexattr,
7249 const struct nfs_rpc_ops nfs_v4_clientops = {
7250 .version = 4, /* protocol version */
7251 .dentry_ops = &nfs4_dentry_operations,
7252 .dir_inode_ops = &nfs4_dir_inode_operations,
7253 .file_inode_ops = &nfs4_file_inode_operations,
7254 .file_ops = &nfs4_file_operations,
7255 .getroot = nfs4_proc_get_root,
7256 .submount = nfs4_submount,
7257 .try_mount = nfs4_try_mount,
7258 .getattr = nfs4_proc_getattr,
7259 .setattr = nfs4_proc_setattr,
7260 .lookup = nfs4_proc_lookup,
7261 .access = nfs4_proc_access,
7262 .readlink = nfs4_proc_readlink,
7263 .create = nfs4_proc_create,
7264 .remove = nfs4_proc_remove,
7265 .unlink_setup = nfs4_proc_unlink_setup,
7266 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
7267 .unlink_done = nfs4_proc_unlink_done,
7268 .rename = nfs4_proc_rename,
7269 .rename_setup = nfs4_proc_rename_setup,
7270 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
7271 .rename_done = nfs4_proc_rename_done,
7272 .link = nfs4_proc_link,
7273 .symlink = nfs4_proc_symlink,
7274 .mkdir = nfs4_proc_mkdir,
7275 .rmdir = nfs4_proc_remove,
7276 .readdir = nfs4_proc_readdir,
7277 .mknod = nfs4_proc_mknod,
7278 .statfs = nfs4_proc_statfs,
7279 .fsinfo = nfs4_proc_fsinfo,
7280 .pathconf = nfs4_proc_pathconf,
7281 .set_capabilities = nfs4_server_capabilities,
7282 .decode_dirent = nfs4_decode_dirent,
7283 .read_setup = nfs4_proc_read_setup,
7284 .read_pageio_init = pnfs_pageio_init_read,
7285 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
7286 .read_done = nfs4_read_done,
7287 .write_setup = nfs4_proc_write_setup,
7288 .write_pageio_init = pnfs_pageio_init_write,
7289 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
7290 .write_done = nfs4_write_done,
7291 .commit_setup = nfs4_proc_commit_setup,
7292 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
7293 .commit_done = nfs4_commit_done,
7294 .lock = nfs4_proc_lock,
7295 .clear_acl_cache = nfs4_zap_acl_attr,
7296 .close_context = nfs4_close_context,
7297 .open_context = nfs4_atomic_open,
7298 .have_delegation = nfs4_have_delegation,
7299 .return_delegation = nfs4_inode_return_delegation,
7300 .alloc_client = nfs4_alloc_client,
7301 .init_client = nfs4_init_client,
7302 .free_client = nfs4_free_client,
7303 .create_server = nfs4_create_server,
7304 .clone_server = nfs_clone_server,
7307 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7308 .prefix = XATTR_NAME_NFSV4_ACL,
7309 .list = nfs4_xattr_list_nfs4_acl,
7310 .get = nfs4_xattr_get_nfs4_acl,
7311 .set = nfs4_xattr_set_nfs4_acl,
7314 const struct xattr_handler *nfs4_xattr_handlers[] = {
7315 &nfs4_xattr_nfs4_acl_handler,