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_free_slot - free a slot and efficiently update slot table.
402 * freeing a slot is trivially done by clearing its respective bit
404 * If the freed slotid equals highest_used_slotid we want to update it
405 * so that the server would be able to size down the slot table if needed,
406 * otherwise we know that the highest_used_slotid is still in use.
407 * When updating highest_used_slotid there may be "holes" in the bitmap
408 * so we need to scan down from highest_used_slotid to 0 looking for the now
409 * highest slotid in use.
410 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
412 * Must be called while holding tbl->slot_tbl_lock
415 nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *slot)
417 u32 slotid = slot->slot_nr;
419 /* clear used bit in bitmap */
420 __clear_bit(slotid, tbl->used_slots);
422 /* update highest_used_slotid when it is freed */
423 if (slotid == tbl->highest_used_slotid) {
424 u32 new_max = find_last_bit(tbl->used_slots, slotid);
425 if (new_max < slotid)
426 tbl->highest_used_slotid = new_max;
428 tbl->highest_used_slotid = NFS4_NO_SLOT;
430 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
431 slotid, tbl->highest_used_slotid);
434 bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
436 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
441 * Signal state manager thread if session fore channel is drained
443 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
445 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
446 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
447 nfs4_set_task_privileged, NULL);
451 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
454 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
455 complete(&ses->fc_slot_table.complete);
459 * Signal state manager thread if session back channel is drained
461 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
463 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
464 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
466 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
467 complete(&ses->bc_slot_table.complete);
470 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
472 struct nfs4_session *session;
473 struct nfs4_slot_table *tbl;
476 /* just wake up the next guy waiting since
477 * we may have not consumed a slot after all */
478 dprintk("%s: No slot\n", __func__);
481 tbl = res->sr_slot->table;
482 session = tbl->session;
484 spin_lock(&tbl->slot_tbl_lock);
485 nfs4_free_slot(tbl, res->sr_slot);
486 nfs4_check_drain_fc_complete(session);
487 spin_unlock(&tbl->slot_tbl_lock);
491 /* Update the client's idea of target_highest_slotid */
492 static void nfs41_set_target_slotid_locked(struct nfs4_slot_table *tbl,
493 u32 target_highest_slotid)
495 if (tbl->target_highest_slotid == target_highest_slotid)
497 tbl->target_highest_slotid = target_highest_slotid;
501 static void nfs41_update_target_slotid(struct nfs4_slot_table *tbl,
502 struct nfs4_slot *slot,
503 struct nfs4_sequence_res *res)
505 spin_lock(&tbl->slot_tbl_lock);
506 if (tbl->generation != slot->generation)
508 nfs41_set_target_slotid_locked(tbl, res->sr_target_highest_slotid);
510 spin_unlock(&tbl->slot_tbl_lock);
513 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
515 struct nfs4_session *session;
516 struct nfs4_slot *slot;
517 unsigned long timestamp;
518 struct nfs_client *clp;
521 * sr_status remains 1 if an RPC level error occurred. The server
522 * may or may not have processed the sequence operation..
523 * Proceed as if the server received and processed the sequence
526 if (res->sr_status == 1)
527 res->sr_status = NFS_OK;
529 /* don't increment the sequence number if the task wasn't sent */
530 if (!RPC_WAS_SENT(task))
534 session = slot->table->session;
536 /* Check the SEQUENCE operation status */
537 switch (res->sr_status) {
539 /* Update the slot's sequence and clientid lease timer */
541 timestamp = slot->renewal_time;
543 do_renew_lease(clp, timestamp);
544 /* Check sequence flags */
545 if (res->sr_status_flags != 0)
546 nfs4_schedule_lease_recovery(clp);
547 nfs41_update_target_slotid(slot->table, slot, res);
550 /* The server detected a resend of the RPC call and
551 * returned NFS4ERR_DELAY as per Section 2.10.6.2
554 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
560 /* Just update the slot sequence no. */
564 /* The session may be reset by one of the error handlers. */
565 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
566 nfs41_sequence_free_slot(res);
569 if (!rpc_restart_call(task))
571 rpc_delay(task, NFS4_POLL_RETRY_MAX);
575 static int nfs4_sequence_done(struct rpc_task *task,
576 struct nfs4_sequence_res *res)
578 if (res->sr_slot == NULL)
580 return nfs41_sequence_done(task, res);
584 * nfs4_alloc_slot - efficiently look for a free slot
586 * nfs4_alloc_slot looks for an unset bit in the used_slots bitmap.
587 * If found, we mark the slot as used, update the highest_used_slotid,
588 * and respectively set up the sequence operation args.
590 * Note: must be called with under the slot_tbl_lock.
592 static struct nfs4_slot *nfs4_alloc_slot(struct nfs4_slot_table *tbl)
594 struct nfs4_slot *ret = NULL;
597 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
598 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
600 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
601 if (slotid >= tbl->max_slots)
603 __set_bit(slotid, tbl->used_slots);
604 if (slotid > tbl->highest_used_slotid ||
605 tbl->highest_used_slotid == NFS4_NO_SLOT)
606 tbl->highest_used_slotid = slotid;
607 ret = &tbl->slots[slotid];
608 ret->renewal_time = jiffies;
609 ret->generation = tbl->generation;
612 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
613 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
614 ret ? ret->slot_nr : -1);
618 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
619 struct nfs4_sequence_res *res, int cache_reply)
621 args->sa_slot = NULL;
622 args->sa_cache_this = 0;
624 args->sa_cache_this = 1;
628 int nfs41_setup_sequence(struct nfs4_session *session,
629 struct nfs4_sequence_args *args,
630 struct nfs4_sequence_res *res,
631 struct rpc_task *task)
633 struct nfs4_slot *slot;
634 struct nfs4_slot_table *tbl;
636 dprintk("--> %s\n", __func__);
637 /* slot already allocated? */
638 if (res->sr_slot != NULL)
641 tbl = &session->fc_slot_table;
643 spin_lock(&tbl->slot_tbl_lock);
644 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
645 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
646 /* The state manager will wait until the slot table is empty */
647 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
648 spin_unlock(&tbl->slot_tbl_lock);
649 dprintk("%s session is draining\n", __func__);
653 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
654 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
655 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
656 spin_unlock(&tbl->slot_tbl_lock);
657 dprintk("%s enforce FIFO order\n", __func__);
661 slot = nfs4_alloc_slot(tbl);
663 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
664 spin_unlock(&tbl->slot_tbl_lock);
665 dprintk("<-- %s: no free slots\n", __func__);
668 spin_unlock(&tbl->slot_tbl_lock);
670 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
672 args->sa_slot = slot;
674 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
675 slot->slot_nr, slot->seq_nr);
678 res->sr_status_flags = 0;
680 * sr_status is only set in decode_sequence, and so will remain
681 * set to 1 if an rpc level failure occurs.
686 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
688 int nfs4_setup_sequence(const struct nfs_server *server,
689 struct nfs4_sequence_args *args,
690 struct nfs4_sequence_res *res,
691 struct rpc_task *task)
693 struct nfs4_session *session = nfs4_get_session(server);
699 dprintk("--> %s clp %p session %p sr_slot %d\n",
700 __func__, session->clp, session, res->sr_slot ?
701 res->sr_slot->slot_nr : -1);
703 ret = nfs41_setup_sequence(session, args, res, task);
705 dprintk("<-- %s status=%d\n", __func__, ret);
709 struct nfs41_call_sync_data {
710 const struct nfs_server *seq_server;
711 struct nfs4_sequence_args *seq_args;
712 struct nfs4_sequence_res *seq_res;
715 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
717 struct nfs41_call_sync_data *data = calldata;
719 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
721 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
722 data->seq_res, task))
724 rpc_call_start(task);
727 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
729 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
730 nfs41_call_sync_prepare(task, calldata);
733 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
735 struct nfs41_call_sync_data *data = calldata;
737 nfs41_sequence_done(task, data->seq_res);
740 static const struct rpc_call_ops nfs41_call_sync_ops = {
741 .rpc_call_prepare = nfs41_call_sync_prepare,
742 .rpc_call_done = nfs41_call_sync_done,
745 static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
746 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
747 .rpc_call_done = nfs41_call_sync_done,
750 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
751 struct nfs_server *server,
752 struct rpc_message *msg,
753 struct nfs4_sequence_args *args,
754 struct nfs4_sequence_res *res,
758 struct rpc_task *task;
759 struct nfs41_call_sync_data data = {
760 .seq_server = server,
764 struct rpc_task_setup task_setup = {
767 .callback_ops = &nfs41_call_sync_ops,
768 .callback_data = &data
772 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
773 task = rpc_run_task(&task_setup);
777 ret = task->tk_status;
783 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
784 struct nfs_server *server,
785 struct rpc_message *msg,
786 struct nfs4_sequence_args *args,
787 struct nfs4_sequence_res *res,
790 nfs41_init_sequence(args, res, cache_reply);
791 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
796 void nfs41_init_sequence(struct nfs4_sequence_args *args,
797 struct nfs4_sequence_res *res, int cache_reply)
801 static int nfs4_sequence_done(struct rpc_task *task,
802 struct nfs4_sequence_res *res)
806 #endif /* CONFIG_NFS_V4_1 */
808 int _nfs4_call_sync(struct rpc_clnt *clnt,
809 struct nfs_server *server,
810 struct rpc_message *msg,
811 struct nfs4_sequence_args *args,
812 struct nfs4_sequence_res *res,
815 nfs41_init_sequence(args, res, cache_reply);
816 return rpc_call_sync(clnt, msg, 0);
820 int nfs4_call_sync(struct rpc_clnt *clnt,
821 struct nfs_server *server,
822 struct rpc_message *msg,
823 struct nfs4_sequence_args *args,
824 struct nfs4_sequence_res *res,
827 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
828 args, res, cache_reply);
831 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
833 struct nfs_inode *nfsi = NFS_I(dir);
835 spin_lock(&dir->i_lock);
836 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
837 if (!cinfo->atomic || cinfo->before != dir->i_version)
838 nfs_force_lookup_revalidate(dir);
839 dir->i_version = cinfo->after;
840 spin_unlock(&dir->i_lock);
843 struct nfs4_opendata {
845 struct nfs_openargs o_arg;
846 struct nfs_openres o_res;
847 struct nfs_open_confirmargs c_arg;
848 struct nfs_open_confirmres c_res;
849 struct nfs4_string owner_name;
850 struct nfs4_string group_name;
851 struct nfs_fattr f_attr;
853 struct dentry *dentry;
854 struct nfs4_state_owner *owner;
855 struct nfs4_state *state;
857 unsigned long timestamp;
858 unsigned int rpc_done : 1;
864 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
866 p->o_res.f_attr = &p->f_attr;
867 p->o_res.seqid = p->o_arg.seqid;
868 p->c_res.seqid = p->c_arg.seqid;
869 p->o_res.server = p->o_arg.server;
870 p->o_res.access_request = p->o_arg.access;
871 nfs_fattr_init(&p->f_attr);
872 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
875 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
876 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
877 const struct iattr *attrs,
880 struct dentry *parent = dget_parent(dentry);
881 struct inode *dir = parent->d_inode;
882 struct nfs_server *server = NFS_SERVER(dir);
883 struct nfs4_opendata *p;
885 p = kzalloc(sizeof(*p), gfp_mask);
888 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
889 if (p->o_arg.seqid == NULL)
891 nfs_sb_active(dentry->d_sb);
892 p->dentry = dget(dentry);
895 atomic_inc(&sp->so_count);
896 p->o_arg.fh = NFS_FH(dir);
897 p->o_arg.open_flags = flags;
898 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
899 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
900 * will return permission denied for all bits until close */
901 if (!(flags & O_EXCL)) {
902 /* ask server to check for all possible rights as results
904 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
905 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
907 p->o_arg.clientid = server->nfs_client->cl_clientid;
908 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
909 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
910 p->o_arg.name = &dentry->d_name;
911 p->o_arg.server = server;
912 p->o_arg.bitmask = server->attr_bitmask;
913 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
914 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
915 if (attrs != NULL && attrs->ia_valid != 0) {
918 p->o_arg.u.attrs = &p->attrs;
919 memcpy(&p->attrs, attrs, sizeof(p->attrs));
922 verf[1] = current->pid;
923 memcpy(p->o_arg.u.verifier.data, verf,
924 sizeof(p->o_arg.u.verifier.data));
926 p->c_arg.fh = &p->o_res.fh;
927 p->c_arg.stateid = &p->o_res.stateid;
928 p->c_arg.seqid = p->o_arg.seqid;
929 nfs4_init_opendata_res(p);
939 static void nfs4_opendata_free(struct kref *kref)
941 struct nfs4_opendata *p = container_of(kref,
942 struct nfs4_opendata, kref);
943 struct super_block *sb = p->dentry->d_sb;
945 nfs_free_seqid(p->o_arg.seqid);
946 if (p->state != NULL)
947 nfs4_put_open_state(p->state);
948 nfs4_put_state_owner(p->owner);
952 nfs_fattr_free_names(&p->f_attr);
956 static void nfs4_opendata_put(struct nfs4_opendata *p)
959 kref_put(&p->kref, nfs4_opendata_free);
962 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
966 ret = rpc_wait_for_completion_task(task);
970 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
974 if (open_mode & (O_EXCL|O_TRUNC))
976 switch (mode & (FMODE_READ|FMODE_WRITE)) {
978 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
979 && state->n_rdonly != 0;
982 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
983 && state->n_wronly != 0;
985 case FMODE_READ|FMODE_WRITE:
986 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
987 && state->n_rdwr != 0;
993 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
995 if (delegation == NULL)
997 if ((delegation->type & fmode) != fmode)
999 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1001 nfs_mark_delegation_referenced(delegation);
1005 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1014 case FMODE_READ|FMODE_WRITE:
1017 nfs4_state_set_mode_locked(state, state->state | fmode);
1020 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1022 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1023 nfs4_stateid_copy(&state->stateid, stateid);
1024 nfs4_stateid_copy(&state->open_stateid, stateid);
1027 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1030 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1032 case FMODE_READ|FMODE_WRITE:
1033 set_bit(NFS_O_RDWR_STATE, &state->flags);
1037 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1039 write_seqlock(&state->seqlock);
1040 nfs_set_open_stateid_locked(state, stateid, fmode);
1041 write_sequnlock(&state->seqlock);
1044 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1047 * Protect the call to nfs4_state_set_mode_locked and
1048 * serialise the stateid update
1050 write_seqlock(&state->seqlock);
1051 if (deleg_stateid != NULL) {
1052 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1053 set_bit(NFS_DELEGATED_STATE, &state->flags);
1055 if (open_stateid != NULL)
1056 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1057 write_sequnlock(&state->seqlock);
1058 spin_lock(&state->owner->so_lock);
1059 update_open_stateflags(state, fmode);
1060 spin_unlock(&state->owner->so_lock);
1063 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1065 struct nfs_inode *nfsi = NFS_I(state->inode);
1066 struct nfs_delegation *deleg_cur;
1069 fmode &= (FMODE_READ|FMODE_WRITE);
1072 deleg_cur = rcu_dereference(nfsi->delegation);
1073 if (deleg_cur == NULL)
1076 spin_lock(&deleg_cur->lock);
1077 if (nfsi->delegation != deleg_cur ||
1078 (deleg_cur->type & fmode) != fmode)
1079 goto no_delegation_unlock;
1081 if (delegation == NULL)
1082 delegation = &deleg_cur->stateid;
1083 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1084 goto no_delegation_unlock;
1086 nfs_mark_delegation_referenced(deleg_cur);
1087 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1089 no_delegation_unlock:
1090 spin_unlock(&deleg_cur->lock);
1094 if (!ret && open_stateid != NULL) {
1095 __update_open_stateid(state, open_stateid, NULL, fmode);
1103 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1105 struct nfs_delegation *delegation;
1108 delegation = rcu_dereference(NFS_I(inode)->delegation);
1109 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1114 nfs4_inode_return_delegation(inode);
1117 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1119 struct nfs4_state *state = opendata->state;
1120 struct nfs_inode *nfsi = NFS_I(state->inode);
1121 struct nfs_delegation *delegation;
1122 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1123 fmode_t fmode = opendata->o_arg.fmode;
1124 nfs4_stateid stateid;
1128 if (can_open_cached(state, fmode, open_mode)) {
1129 spin_lock(&state->owner->so_lock);
1130 if (can_open_cached(state, fmode, open_mode)) {
1131 update_open_stateflags(state, fmode);
1132 spin_unlock(&state->owner->so_lock);
1133 goto out_return_state;
1135 spin_unlock(&state->owner->so_lock);
1138 delegation = rcu_dereference(nfsi->delegation);
1139 if (!can_open_delegated(delegation, fmode)) {
1143 /* Save the delegation */
1144 nfs4_stateid_copy(&stateid, &delegation->stateid);
1146 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1151 /* Try to update the stateid using the delegation */
1152 if (update_open_stateid(state, NULL, &stateid, fmode))
1153 goto out_return_state;
1156 return ERR_PTR(ret);
1158 atomic_inc(&state->count);
1163 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1165 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1166 struct nfs_delegation *delegation;
1167 int delegation_flags = 0;
1170 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1172 delegation_flags = delegation->flags;
1174 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1175 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1176 "returning a delegation for "
1177 "OPEN(CLAIM_DELEGATE_CUR)\n",
1179 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1180 nfs_inode_set_delegation(state->inode,
1181 data->owner->so_cred,
1184 nfs_inode_reclaim_delegation(state->inode,
1185 data->owner->so_cred,
1190 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1191 * and update the nfs4_state.
1193 static struct nfs4_state *
1194 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1196 struct inode *inode = data->state->inode;
1197 struct nfs4_state *state = data->state;
1200 if (!data->rpc_done) {
1201 ret = data->rpc_status;
1206 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1207 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1208 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1212 state = nfs4_get_open_state(inode, data->owner);
1216 ret = nfs_refresh_inode(inode, &data->f_attr);
1220 if (data->o_res.delegation_type != 0)
1221 nfs4_opendata_check_deleg(data, state);
1222 update_open_stateid(state, &data->o_res.stateid, NULL,
1227 return ERR_PTR(ret);
1231 static struct nfs4_state *
1232 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1234 struct inode *inode;
1235 struct nfs4_state *state = NULL;
1238 if (!data->rpc_done) {
1239 state = nfs4_try_open_cached(data);
1244 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1246 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1247 ret = PTR_ERR(inode);
1251 state = nfs4_get_open_state(inode, data->owner);
1254 if (data->o_res.delegation_type != 0)
1255 nfs4_opendata_check_deleg(data, state);
1256 update_open_stateid(state, &data->o_res.stateid, NULL,
1264 return ERR_PTR(ret);
1267 static struct nfs4_state *
1268 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1270 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1271 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1272 return _nfs4_opendata_to_nfs4_state(data);
1275 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1277 struct nfs_inode *nfsi = NFS_I(state->inode);
1278 struct nfs_open_context *ctx;
1280 spin_lock(&state->inode->i_lock);
1281 list_for_each_entry(ctx, &nfsi->open_files, list) {
1282 if (ctx->state != state)
1284 get_nfs_open_context(ctx);
1285 spin_unlock(&state->inode->i_lock);
1288 spin_unlock(&state->inode->i_lock);
1289 return ERR_PTR(-ENOENT);
1292 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1294 struct nfs4_opendata *opendata;
1296 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1297 if (opendata == NULL)
1298 return ERR_PTR(-ENOMEM);
1299 opendata->state = state;
1300 atomic_inc(&state->count);
1304 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1306 struct nfs4_state *newstate;
1309 opendata->o_arg.open_flags = 0;
1310 opendata->o_arg.fmode = fmode;
1311 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1312 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1313 nfs4_init_opendata_res(opendata);
1314 ret = _nfs4_recover_proc_open(opendata);
1317 newstate = nfs4_opendata_to_nfs4_state(opendata);
1318 if (IS_ERR(newstate))
1319 return PTR_ERR(newstate);
1320 nfs4_close_state(newstate, fmode);
1325 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1327 struct nfs4_state *newstate;
1330 /* memory barrier prior to reading state->n_* */
1331 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1333 if (state->n_rdwr != 0) {
1334 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1335 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1338 if (newstate != state)
1341 if (state->n_wronly != 0) {
1342 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1343 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1346 if (newstate != state)
1349 if (state->n_rdonly != 0) {
1350 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1351 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1354 if (newstate != state)
1358 * We may have performed cached opens for all three recoveries.
1359 * Check if we need to update the current stateid.
1361 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1362 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1363 write_seqlock(&state->seqlock);
1364 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1365 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1366 write_sequnlock(&state->seqlock);
1373 * reclaim state on the server after a reboot.
1375 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1377 struct nfs_delegation *delegation;
1378 struct nfs4_opendata *opendata;
1379 fmode_t delegation_type = 0;
1382 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1383 if (IS_ERR(opendata))
1384 return PTR_ERR(opendata);
1385 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1386 opendata->o_arg.fh = NFS_FH(state->inode);
1388 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1389 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1390 delegation_type = delegation->type;
1392 opendata->o_arg.u.delegation_type = delegation_type;
1393 status = nfs4_open_recover(opendata, state);
1394 nfs4_opendata_put(opendata);
1398 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1400 struct nfs_server *server = NFS_SERVER(state->inode);
1401 struct nfs4_exception exception = { };
1404 err = _nfs4_do_open_reclaim(ctx, state);
1405 if (err != -NFS4ERR_DELAY)
1407 nfs4_handle_exception(server, err, &exception);
1408 } while (exception.retry);
1412 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1414 struct nfs_open_context *ctx;
1417 ctx = nfs4_state_find_open_context(state);
1419 return PTR_ERR(ctx);
1420 ret = nfs4_do_open_reclaim(ctx, state);
1421 put_nfs_open_context(ctx);
1425 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1427 struct nfs4_opendata *opendata;
1430 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1431 if (IS_ERR(opendata))
1432 return PTR_ERR(opendata);
1433 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1434 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1435 ret = nfs4_open_recover(opendata, state);
1436 nfs4_opendata_put(opendata);
1440 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1442 struct nfs4_exception exception = { };
1443 struct nfs_server *server = NFS_SERVER(state->inode);
1446 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1452 case -NFS4ERR_BADSESSION:
1453 case -NFS4ERR_BADSLOT:
1454 case -NFS4ERR_BAD_HIGH_SLOT:
1455 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1456 case -NFS4ERR_DEADSESSION:
1457 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1459 case -NFS4ERR_STALE_CLIENTID:
1460 case -NFS4ERR_STALE_STATEID:
1461 case -NFS4ERR_EXPIRED:
1462 /* Don't recall a delegation if it was lost */
1463 nfs4_schedule_lease_recovery(server->nfs_client);
1467 * The show must go on: exit, but mark the
1468 * stateid as needing recovery.
1470 case -NFS4ERR_DELEG_REVOKED:
1471 case -NFS4ERR_ADMIN_REVOKED:
1472 case -NFS4ERR_BAD_STATEID:
1473 nfs_inode_find_state_and_recover(state->inode,
1475 nfs4_schedule_stateid_recovery(server, state);
1478 * User RPCSEC_GSS context has expired.
1479 * We cannot recover this stateid now, so
1480 * skip it and allow recovery thread to
1487 err = nfs4_handle_exception(server, err, &exception);
1488 } while (exception.retry);
1493 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1495 struct nfs4_opendata *data = calldata;
1497 data->rpc_status = task->tk_status;
1498 if (data->rpc_status == 0) {
1499 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1500 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1501 renew_lease(data->o_res.server, data->timestamp);
1506 static void nfs4_open_confirm_release(void *calldata)
1508 struct nfs4_opendata *data = calldata;
1509 struct nfs4_state *state = NULL;
1511 /* If this request hasn't been cancelled, do nothing */
1512 if (data->cancelled == 0)
1514 /* In case of error, no cleanup! */
1515 if (!data->rpc_done)
1517 state = nfs4_opendata_to_nfs4_state(data);
1519 nfs4_close_state(state, data->o_arg.fmode);
1521 nfs4_opendata_put(data);
1524 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1525 .rpc_call_done = nfs4_open_confirm_done,
1526 .rpc_release = nfs4_open_confirm_release,
1530 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1532 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1534 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1535 struct rpc_task *task;
1536 struct rpc_message msg = {
1537 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1538 .rpc_argp = &data->c_arg,
1539 .rpc_resp = &data->c_res,
1540 .rpc_cred = data->owner->so_cred,
1542 struct rpc_task_setup task_setup_data = {
1543 .rpc_client = server->client,
1544 .rpc_message = &msg,
1545 .callback_ops = &nfs4_open_confirm_ops,
1546 .callback_data = data,
1547 .workqueue = nfsiod_workqueue,
1548 .flags = RPC_TASK_ASYNC,
1552 kref_get(&data->kref);
1554 data->rpc_status = 0;
1555 data->timestamp = jiffies;
1556 task = rpc_run_task(&task_setup_data);
1558 return PTR_ERR(task);
1559 status = nfs4_wait_for_completion_rpc_task(task);
1561 data->cancelled = 1;
1564 status = data->rpc_status;
1569 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1571 struct nfs4_opendata *data = calldata;
1572 struct nfs4_state_owner *sp = data->owner;
1574 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1577 * Check if we still need to send an OPEN call, or if we can use
1578 * a delegation instead.
1580 if (data->state != NULL) {
1581 struct nfs_delegation *delegation;
1583 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1586 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1587 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1588 can_open_delegated(delegation, data->o_arg.fmode))
1589 goto unlock_no_action;
1592 /* Update client id. */
1593 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1594 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1595 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1596 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1597 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1599 data->timestamp = jiffies;
1600 if (nfs4_setup_sequence(data->o_arg.server,
1601 &data->o_arg.seq_args,
1602 &data->o_res.seq_res,
1604 nfs_release_seqid(data->o_arg.seqid);
1606 rpc_call_start(task);
1611 task->tk_action = NULL;
1615 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1617 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1618 nfs4_open_prepare(task, calldata);
1621 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1623 struct nfs4_opendata *data = calldata;
1625 data->rpc_status = task->tk_status;
1627 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1630 if (task->tk_status == 0) {
1631 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1632 switch (data->o_res.f_attr->mode & S_IFMT) {
1636 data->rpc_status = -ELOOP;
1639 data->rpc_status = -EISDIR;
1642 data->rpc_status = -ENOTDIR;
1645 renew_lease(data->o_res.server, data->timestamp);
1646 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1647 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1652 static void nfs4_open_release(void *calldata)
1654 struct nfs4_opendata *data = calldata;
1655 struct nfs4_state *state = NULL;
1657 /* If this request hasn't been cancelled, do nothing */
1658 if (data->cancelled == 0)
1660 /* In case of error, no cleanup! */
1661 if (data->rpc_status != 0 || !data->rpc_done)
1663 /* In case we need an open_confirm, no cleanup! */
1664 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1666 state = nfs4_opendata_to_nfs4_state(data);
1668 nfs4_close_state(state, data->o_arg.fmode);
1670 nfs4_opendata_put(data);
1673 static const struct rpc_call_ops nfs4_open_ops = {
1674 .rpc_call_prepare = nfs4_open_prepare,
1675 .rpc_call_done = nfs4_open_done,
1676 .rpc_release = nfs4_open_release,
1679 static const struct rpc_call_ops nfs4_recover_open_ops = {
1680 .rpc_call_prepare = nfs4_recover_open_prepare,
1681 .rpc_call_done = nfs4_open_done,
1682 .rpc_release = nfs4_open_release,
1685 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1687 struct inode *dir = data->dir->d_inode;
1688 struct nfs_server *server = NFS_SERVER(dir);
1689 struct nfs_openargs *o_arg = &data->o_arg;
1690 struct nfs_openres *o_res = &data->o_res;
1691 struct rpc_task *task;
1692 struct rpc_message msg = {
1693 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1696 .rpc_cred = data->owner->so_cred,
1698 struct rpc_task_setup task_setup_data = {
1699 .rpc_client = server->client,
1700 .rpc_message = &msg,
1701 .callback_ops = &nfs4_open_ops,
1702 .callback_data = data,
1703 .workqueue = nfsiod_workqueue,
1704 .flags = RPC_TASK_ASYNC,
1708 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1709 kref_get(&data->kref);
1711 data->rpc_status = 0;
1712 data->cancelled = 0;
1714 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1715 task = rpc_run_task(&task_setup_data);
1717 return PTR_ERR(task);
1718 status = nfs4_wait_for_completion_rpc_task(task);
1720 data->cancelled = 1;
1723 status = data->rpc_status;
1729 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1731 struct inode *dir = data->dir->d_inode;
1732 struct nfs_openres *o_res = &data->o_res;
1735 status = nfs4_run_open_task(data, 1);
1736 if (status != 0 || !data->rpc_done)
1739 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1741 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1742 status = _nfs4_proc_open_confirm(data);
1750 static int nfs4_opendata_access(struct rpc_cred *cred,
1751 struct nfs4_opendata *opendata,
1752 struct nfs4_state *state, fmode_t fmode)
1754 struct nfs_access_entry cache;
1757 /* access call failed or for some reason the server doesn't
1758 * support any access modes -- defer access call until later */
1759 if (opendata->o_res.access_supported == 0)
1763 /* don't check MAY_WRITE - a newly created file may not have
1764 * write mode bits, but POSIX allows the creating process to write */
1765 if (fmode & FMODE_READ)
1767 if (fmode & FMODE_EXEC)
1771 cache.jiffies = jiffies;
1772 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1773 nfs_access_add_cache(state->inode, &cache);
1775 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1778 /* even though OPEN succeeded, access is denied. Close the file */
1779 nfs4_close_state(state, fmode);
1784 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1786 static int _nfs4_proc_open(struct nfs4_opendata *data)
1788 struct inode *dir = data->dir->d_inode;
1789 struct nfs_server *server = NFS_SERVER(dir);
1790 struct nfs_openargs *o_arg = &data->o_arg;
1791 struct nfs_openres *o_res = &data->o_res;
1794 status = nfs4_run_open_task(data, 0);
1795 if (!data->rpc_done)
1798 if (status == -NFS4ERR_BADNAME &&
1799 !(o_arg->open_flags & O_CREAT))
1804 nfs_fattr_map_and_free_names(server, &data->f_attr);
1806 if (o_arg->open_flags & O_CREAT)
1807 update_changeattr(dir, &o_res->cinfo);
1808 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1809 server->caps &= ~NFS_CAP_POSIX_LOCK;
1810 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1811 status = _nfs4_proc_open_confirm(data);
1815 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1816 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1820 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1825 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1826 ret = nfs4_wait_clnt_recover(clp);
1829 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1830 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1832 nfs4_schedule_state_manager(clp);
1838 static int nfs4_recover_expired_lease(struct nfs_server *server)
1840 return nfs4_client_recover_expired_lease(server->nfs_client);
1845 * reclaim state on the server after a network partition.
1846 * Assumes caller holds the appropriate lock
1848 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1850 struct nfs4_opendata *opendata;
1853 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1854 if (IS_ERR(opendata))
1855 return PTR_ERR(opendata);
1856 ret = nfs4_open_recover(opendata, state);
1858 d_drop(ctx->dentry);
1859 nfs4_opendata_put(opendata);
1863 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1865 struct nfs_server *server = NFS_SERVER(state->inode);
1866 struct nfs4_exception exception = { };
1870 err = _nfs4_open_expired(ctx, state);
1874 case -NFS4ERR_GRACE:
1875 case -NFS4ERR_DELAY:
1876 nfs4_handle_exception(server, err, &exception);
1879 } while (exception.retry);
1884 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1886 struct nfs_open_context *ctx;
1889 ctx = nfs4_state_find_open_context(state);
1891 return PTR_ERR(ctx);
1892 ret = nfs4_do_open_expired(ctx, state);
1893 put_nfs_open_context(ctx);
1897 #if defined(CONFIG_NFS_V4_1)
1898 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1900 struct nfs_server *server = NFS_SERVER(state->inode);
1901 nfs4_stateid *stateid = &state->stateid;
1904 /* If a state reset has been done, test_stateid is unneeded */
1905 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1908 status = nfs41_test_stateid(server, stateid);
1909 if (status != NFS_OK) {
1910 /* Free the stateid unless the server explicitly
1911 * informs us the stateid is unrecognized. */
1912 if (status != -NFS4ERR_BAD_STATEID)
1913 nfs41_free_stateid(server, stateid);
1914 nfs_remove_bad_delegation(state->inode);
1916 write_seqlock(&state->seqlock);
1917 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1918 write_sequnlock(&state->seqlock);
1919 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1924 * nfs41_check_open_stateid - possibly free an open stateid
1926 * @state: NFSv4 state for an inode
1928 * Returns NFS_OK if recovery for this stateid is now finished.
1929 * Otherwise a negative NFS4ERR value is returned.
1931 static int nfs41_check_open_stateid(struct nfs4_state *state)
1933 struct nfs_server *server = NFS_SERVER(state->inode);
1934 nfs4_stateid *stateid = &state->open_stateid;
1937 /* If a state reset has been done, test_stateid is unneeded */
1938 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1939 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1940 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1941 return -NFS4ERR_BAD_STATEID;
1943 status = nfs41_test_stateid(server, stateid);
1944 if (status != NFS_OK) {
1945 /* Free the stateid unless the server explicitly
1946 * informs us the stateid is unrecognized. */
1947 if (status != -NFS4ERR_BAD_STATEID)
1948 nfs41_free_stateid(server, stateid);
1950 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1951 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1952 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1957 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1961 nfs41_clear_delegation_stateid(state);
1962 status = nfs41_check_open_stateid(state);
1963 if (status != NFS_OK)
1964 status = nfs4_open_expired(sp, state);
1970 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1971 * fields corresponding to attributes that were used to store the verifier.
1972 * Make sure we clobber those fields in the later setattr call
1974 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1976 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1977 !(sattr->ia_valid & ATTR_ATIME_SET))
1978 sattr->ia_valid |= ATTR_ATIME;
1980 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1981 !(sattr->ia_valid & ATTR_MTIME_SET))
1982 sattr->ia_valid |= ATTR_MTIME;
1986 * Returns a referenced nfs4_state
1988 static int _nfs4_do_open(struct inode *dir,
1989 struct dentry *dentry,
1992 struct iattr *sattr,
1993 struct rpc_cred *cred,
1994 struct nfs4_state **res,
1995 struct nfs4_threshold **ctx_th)
1997 struct nfs4_state_owner *sp;
1998 struct nfs4_state *state = NULL;
1999 struct nfs_server *server = NFS_SERVER(dir);
2000 struct nfs4_opendata *opendata;
2003 /* Protect against reboot recovery conflicts */
2005 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2007 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2010 status = nfs4_recover_expired_lease(server);
2012 goto err_put_state_owner;
2013 if (dentry->d_inode != NULL)
2014 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
2016 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
2017 if (opendata == NULL)
2018 goto err_put_state_owner;
2020 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2021 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2022 if (!opendata->f_attr.mdsthreshold)
2023 goto err_opendata_put;
2024 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2026 if (dentry->d_inode != NULL)
2027 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2029 status = _nfs4_proc_open(opendata);
2031 goto err_opendata_put;
2033 state = nfs4_opendata_to_nfs4_state(opendata);
2034 status = PTR_ERR(state);
2036 goto err_opendata_put;
2037 if (server->caps & NFS_CAP_POSIX_LOCK)
2038 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2040 status = nfs4_opendata_access(cred, opendata, state, fmode);
2042 goto err_opendata_put;
2044 if (opendata->o_arg.open_flags & O_EXCL) {
2045 nfs4_exclusive_attrset(opendata, sattr);
2047 nfs_fattr_init(opendata->o_res.f_attr);
2048 status = nfs4_do_setattr(state->inode, cred,
2049 opendata->o_res.f_attr, sattr,
2052 nfs_setattr_update_inode(state->inode, sattr);
2053 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2056 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2057 *ctx_th = opendata->f_attr.mdsthreshold;
2059 kfree(opendata->f_attr.mdsthreshold);
2060 opendata->f_attr.mdsthreshold = NULL;
2062 nfs4_opendata_put(opendata);
2063 nfs4_put_state_owner(sp);
2067 kfree(opendata->f_attr.mdsthreshold);
2068 nfs4_opendata_put(opendata);
2069 err_put_state_owner:
2070 nfs4_put_state_owner(sp);
2077 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2078 struct dentry *dentry,
2081 struct iattr *sattr,
2082 struct rpc_cred *cred,
2083 struct nfs4_threshold **ctx_th)
2085 struct nfs4_exception exception = { };
2086 struct nfs4_state *res;
2089 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
2091 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2095 /* NOTE: BAD_SEQID means the server and client disagree about the
2096 * book-keeping w.r.t. state-changing operations
2097 * (OPEN/CLOSE/LOCK/LOCKU...)
2098 * It is actually a sign of a bug on the client or on the server.
2100 * If we receive a BAD_SEQID error in the particular case of
2101 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2102 * have unhashed the old state_owner for us, and that we can
2103 * therefore safely retry using a new one. We should still warn
2104 * the user though...
2106 if (status == -NFS4ERR_BAD_SEQID) {
2107 pr_warn_ratelimited("NFS: v4 server %s "
2108 " returned a bad sequence-id error!\n",
2109 NFS_SERVER(dir)->nfs_client->cl_hostname);
2110 exception.retry = 1;
2114 * BAD_STATEID on OPEN means that the server cancelled our
2115 * state before it received the OPEN_CONFIRM.
2116 * Recover by retrying the request as per the discussion
2117 * on Page 181 of RFC3530.
2119 if (status == -NFS4ERR_BAD_STATEID) {
2120 exception.retry = 1;
2123 if (status == -EAGAIN) {
2124 /* We must have found a delegation */
2125 exception.retry = 1;
2128 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2129 status, &exception));
2130 } while (exception.retry);
2134 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2135 struct nfs_fattr *fattr, struct iattr *sattr,
2136 struct nfs4_state *state)
2138 struct nfs_server *server = NFS_SERVER(inode);
2139 struct nfs_setattrargs arg = {
2140 .fh = NFS_FH(inode),
2143 .bitmask = server->attr_bitmask,
2145 struct nfs_setattrres res = {
2149 struct rpc_message msg = {
2150 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2155 unsigned long timestamp = jiffies;
2158 nfs_fattr_init(fattr);
2160 if (state != NULL) {
2161 struct nfs_lockowner lockowner = {
2162 .l_owner = current->files,
2163 .l_pid = current->tgid,
2165 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2167 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2169 /* Use that stateid */
2171 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2173 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2174 if (status == 0 && state != NULL)
2175 renew_lease(server, timestamp);
2179 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2180 struct nfs_fattr *fattr, struct iattr *sattr,
2181 struct nfs4_state *state)
2183 struct nfs_server *server = NFS_SERVER(inode);
2184 struct nfs4_exception exception = {
2190 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2192 case -NFS4ERR_OPENMODE:
2193 if (state && !(state->state & FMODE_WRITE)) {
2195 if (sattr->ia_valid & ATTR_OPEN)
2200 err = nfs4_handle_exception(server, err, &exception);
2201 } while (exception.retry);
2206 struct nfs4_closedata {
2207 struct inode *inode;
2208 struct nfs4_state *state;
2209 struct nfs_closeargs arg;
2210 struct nfs_closeres res;
2211 struct nfs_fattr fattr;
2212 unsigned long timestamp;
2217 static void nfs4_free_closedata(void *data)
2219 struct nfs4_closedata *calldata = data;
2220 struct nfs4_state_owner *sp = calldata->state->owner;
2221 struct super_block *sb = calldata->state->inode->i_sb;
2224 pnfs_roc_release(calldata->state->inode);
2225 nfs4_put_open_state(calldata->state);
2226 nfs_free_seqid(calldata->arg.seqid);
2227 nfs4_put_state_owner(sp);
2228 nfs_sb_deactive_async(sb);
2232 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2235 spin_lock(&state->owner->so_lock);
2236 if (!(fmode & FMODE_READ))
2237 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2238 if (!(fmode & FMODE_WRITE))
2239 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2240 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2241 spin_unlock(&state->owner->so_lock);
2244 static void nfs4_close_done(struct rpc_task *task, void *data)
2246 struct nfs4_closedata *calldata = data;
2247 struct nfs4_state *state = calldata->state;
2248 struct nfs_server *server = NFS_SERVER(calldata->inode);
2250 dprintk("%s: begin!\n", __func__);
2251 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2253 /* hmm. we are done with the inode, and in the process of freeing
2254 * the state_owner. we keep this around to process errors
2256 switch (task->tk_status) {
2259 pnfs_roc_set_barrier(state->inode,
2260 calldata->roc_barrier);
2261 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2262 renew_lease(server, calldata->timestamp);
2263 nfs4_close_clear_stateid_flags(state,
2264 calldata->arg.fmode);
2266 case -NFS4ERR_STALE_STATEID:
2267 case -NFS4ERR_OLD_STATEID:
2268 case -NFS4ERR_BAD_STATEID:
2269 case -NFS4ERR_EXPIRED:
2270 if (calldata->arg.fmode == 0)
2273 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2274 rpc_restart_call_prepare(task);
2276 nfs_release_seqid(calldata->arg.seqid);
2277 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2278 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2281 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2283 struct nfs4_closedata *calldata = data;
2284 struct nfs4_state *state = calldata->state;
2285 struct inode *inode = calldata->inode;
2288 dprintk("%s: begin!\n", __func__);
2289 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2292 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2293 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2294 spin_lock(&state->owner->so_lock);
2295 /* Calculate the change in open mode */
2296 if (state->n_rdwr == 0) {
2297 if (state->n_rdonly == 0) {
2298 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2299 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2300 calldata->arg.fmode &= ~FMODE_READ;
2302 if (state->n_wronly == 0) {
2303 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2304 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2305 calldata->arg.fmode &= ~FMODE_WRITE;
2308 spin_unlock(&state->owner->so_lock);
2311 /* Note: exit _without_ calling nfs4_close_done */
2312 task->tk_action = NULL;
2316 if (calldata->arg.fmode == 0) {
2317 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2318 if (calldata->roc &&
2319 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
2323 nfs_fattr_init(calldata->res.fattr);
2324 calldata->timestamp = jiffies;
2325 if (nfs4_setup_sequence(NFS_SERVER(inode),
2326 &calldata->arg.seq_args,
2327 &calldata->res.seq_res,
2329 nfs_release_seqid(calldata->arg.seqid);
2331 rpc_call_start(task);
2333 dprintk("%s: done!\n", __func__);
2336 static const struct rpc_call_ops nfs4_close_ops = {
2337 .rpc_call_prepare = nfs4_close_prepare,
2338 .rpc_call_done = nfs4_close_done,
2339 .rpc_release = nfs4_free_closedata,
2343 * It is possible for data to be read/written from a mem-mapped file
2344 * after the sys_close call (which hits the vfs layer as a flush).
2345 * This means that we can't safely call nfsv4 close on a file until
2346 * the inode is cleared. This in turn means that we are not good
2347 * NFSv4 citizens - we do not indicate to the server to update the file's
2348 * share state even when we are done with one of the three share
2349 * stateid's in the inode.
2351 * NOTE: Caller must be holding the sp->so_owner semaphore!
2353 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2355 struct nfs_server *server = NFS_SERVER(state->inode);
2356 struct nfs4_closedata *calldata;
2357 struct nfs4_state_owner *sp = state->owner;
2358 struct rpc_task *task;
2359 struct rpc_message msg = {
2360 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2361 .rpc_cred = state->owner->so_cred,
2363 struct rpc_task_setup task_setup_data = {
2364 .rpc_client = server->client,
2365 .rpc_message = &msg,
2366 .callback_ops = &nfs4_close_ops,
2367 .workqueue = nfsiod_workqueue,
2368 .flags = RPC_TASK_ASYNC,
2370 int status = -ENOMEM;
2372 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2373 if (calldata == NULL)
2375 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2376 calldata->inode = state->inode;
2377 calldata->state = state;
2378 calldata->arg.fh = NFS_FH(state->inode);
2379 calldata->arg.stateid = &state->open_stateid;
2380 /* Serialization for the sequence id */
2381 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2382 if (calldata->arg.seqid == NULL)
2383 goto out_free_calldata;
2384 calldata->arg.fmode = 0;
2385 calldata->arg.bitmask = server->cache_consistency_bitmask;
2386 calldata->res.fattr = &calldata->fattr;
2387 calldata->res.seqid = calldata->arg.seqid;
2388 calldata->res.server = server;
2389 calldata->roc = pnfs_roc(state->inode);
2390 nfs_sb_active(calldata->inode->i_sb);
2392 msg.rpc_argp = &calldata->arg;
2393 msg.rpc_resp = &calldata->res;
2394 task_setup_data.callback_data = calldata;
2395 task = rpc_run_task(&task_setup_data);
2397 return PTR_ERR(task);
2400 status = rpc_wait_for_completion_task(task);
2406 nfs4_put_open_state(state);
2407 nfs4_put_state_owner(sp);
2411 static struct inode *
2412 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2414 struct nfs4_state *state;
2416 /* Protect against concurrent sillydeletes */
2417 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2418 ctx->cred, &ctx->mdsthreshold);
2420 return ERR_CAST(state);
2422 return igrab(state->inode);
2425 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2427 if (ctx->state == NULL)
2430 nfs4_close_sync(ctx->state, ctx->mode);
2432 nfs4_close_state(ctx->state, ctx->mode);
2435 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2437 struct nfs4_server_caps_arg args = {
2440 struct nfs4_server_caps_res res = {};
2441 struct rpc_message msg = {
2442 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2448 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2450 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2451 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2452 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2453 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2454 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2455 NFS_CAP_CTIME|NFS_CAP_MTIME);
2456 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2457 server->caps |= NFS_CAP_ACLS;
2458 if (res.has_links != 0)
2459 server->caps |= NFS_CAP_HARDLINKS;
2460 if (res.has_symlinks != 0)
2461 server->caps |= NFS_CAP_SYMLINKS;
2462 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2463 server->caps |= NFS_CAP_FILEID;
2464 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2465 server->caps |= NFS_CAP_MODE;
2466 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2467 server->caps |= NFS_CAP_NLINK;
2468 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2469 server->caps |= NFS_CAP_OWNER;
2470 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2471 server->caps |= NFS_CAP_OWNER_GROUP;
2472 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2473 server->caps |= NFS_CAP_ATIME;
2474 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2475 server->caps |= NFS_CAP_CTIME;
2476 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2477 server->caps |= NFS_CAP_MTIME;
2479 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2480 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2481 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2482 server->acl_bitmask = res.acl_bitmask;
2483 server->fh_expire_type = res.fh_expire_type;
2489 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2491 struct nfs4_exception exception = { };
2494 err = nfs4_handle_exception(server,
2495 _nfs4_server_capabilities(server, fhandle),
2497 } while (exception.retry);
2501 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2502 struct nfs_fsinfo *info)
2504 struct nfs4_lookup_root_arg args = {
2505 .bitmask = nfs4_fattr_bitmap,
2507 struct nfs4_lookup_res res = {
2509 .fattr = info->fattr,
2512 struct rpc_message msg = {
2513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2518 nfs_fattr_init(info->fattr);
2519 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2522 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2523 struct nfs_fsinfo *info)
2525 struct nfs4_exception exception = { };
2528 err = _nfs4_lookup_root(server, fhandle, info);
2531 case -NFS4ERR_WRONGSEC:
2534 err = nfs4_handle_exception(server, err, &exception);
2536 } while (exception.retry);
2541 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2542 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2544 struct rpc_auth *auth;
2547 auth = rpcauth_create(flavor, server->client);
2552 ret = nfs4_lookup_root(server, fhandle, info);
2557 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2558 struct nfs_fsinfo *info)
2560 int i, len, status = 0;
2561 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2563 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2567 for (i = 0; i < len; i++) {
2568 /* AUTH_UNIX is the default flavor if none was specified,
2569 * thus has already been tried. */
2570 if (flav_array[i] == RPC_AUTH_UNIX)
2573 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2574 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2579 * -EACCESS could mean that the user doesn't have correct permissions
2580 * to access the mount. It could also mean that we tried to mount
2581 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2582 * existing mount programs don't handle -EACCES very well so it should
2583 * be mapped to -EPERM instead.
2585 if (status == -EACCES)
2591 * get the file handle for the "/" directory on the server
2593 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2594 struct nfs_fsinfo *info)
2596 int minor_version = server->nfs_client->cl_minorversion;
2597 int status = nfs4_lookup_root(server, fhandle, info);
2598 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2600 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2601 * by nfs4_map_errors() as this function exits.
2603 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2605 status = nfs4_server_capabilities(server, fhandle);
2607 status = nfs4_do_fsinfo(server, fhandle, info);
2608 return nfs4_map_errors(status);
2611 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2612 struct nfs_fsinfo *info)
2615 struct nfs_fattr *fattr = info->fattr;
2617 error = nfs4_server_capabilities(server, mntfh);
2619 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2623 error = nfs4_proc_getattr(server, mntfh, fattr);
2625 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2629 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2630 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2631 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2637 * Get locations and (maybe) other attributes of a referral.
2638 * Note that we'll actually follow the referral later when
2639 * we detect fsid mismatch in inode revalidation
2641 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2642 const struct qstr *name, struct nfs_fattr *fattr,
2643 struct nfs_fh *fhandle)
2645 int status = -ENOMEM;
2646 struct page *page = NULL;
2647 struct nfs4_fs_locations *locations = NULL;
2649 page = alloc_page(GFP_KERNEL);
2652 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2653 if (locations == NULL)
2656 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2659 /* Make sure server returned a different fsid for the referral */
2660 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2661 dprintk("%s: server did not return a different fsid for"
2662 " a referral at %s\n", __func__, name->name);
2666 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2667 nfs_fixup_referral_attributes(&locations->fattr);
2669 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2670 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2671 memset(fhandle, 0, sizeof(struct nfs_fh));
2679 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2681 struct nfs4_getattr_arg args = {
2683 .bitmask = server->attr_bitmask,
2685 struct nfs4_getattr_res res = {
2689 struct rpc_message msg = {
2690 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2695 nfs_fattr_init(fattr);
2696 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2699 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2701 struct nfs4_exception exception = { };
2704 err = nfs4_handle_exception(server,
2705 _nfs4_proc_getattr(server, fhandle, fattr),
2707 } while (exception.retry);
2712 * The file is not closed if it is opened due to the a request to change
2713 * the size of the file. The open call will not be needed once the
2714 * VFS layer lookup-intents are implemented.
2716 * Close is called when the inode is destroyed.
2717 * If we haven't opened the file for O_WRONLY, we
2718 * need to in the size_change case to obtain a stateid.
2721 * Because OPEN is always done by name in nfsv4, it is
2722 * possible that we opened a different file by the same
2723 * name. We can recognize this race condition, but we
2724 * can't do anything about it besides returning an error.
2726 * This will be fixed with VFS changes (lookup-intent).
2729 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2730 struct iattr *sattr)
2732 struct inode *inode = dentry->d_inode;
2733 struct rpc_cred *cred = NULL;
2734 struct nfs4_state *state = NULL;
2737 if (pnfs_ld_layoutret_on_setattr(inode))
2738 pnfs_return_layout(inode);
2740 nfs_fattr_init(fattr);
2742 /* Deal with open(O_TRUNC) */
2743 if (sattr->ia_valid & ATTR_OPEN)
2744 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2746 /* Optimization: if the end result is no change, don't RPC */
2747 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2750 /* Search for an existing open(O_WRITE) file */
2751 if (sattr->ia_valid & ATTR_FILE) {
2752 struct nfs_open_context *ctx;
2754 ctx = nfs_file_open_context(sattr->ia_file);
2761 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2763 nfs_setattr_update_inode(inode, sattr);
2767 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2768 const struct qstr *name, struct nfs_fh *fhandle,
2769 struct nfs_fattr *fattr)
2771 struct nfs_server *server = NFS_SERVER(dir);
2773 struct nfs4_lookup_arg args = {
2774 .bitmask = server->attr_bitmask,
2775 .dir_fh = NFS_FH(dir),
2778 struct nfs4_lookup_res res = {
2783 struct rpc_message msg = {
2784 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2789 nfs_fattr_init(fattr);
2791 dprintk("NFS call lookup %s\n", name->name);
2792 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2793 dprintk("NFS reply lookup: %d\n", status);
2797 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2799 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2800 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2801 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2805 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2806 struct qstr *name, struct nfs_fh *fhandle,
2807 struct nfs_fattr *fattr)
2809 struct nfs4_exception exception = { };
2810 struct rpc_clnt *client = *clnt;
2813 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2815 case -NFS4ERR_BADNAME:
2818 case -NFS4ERR_MOVED:
2819 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2821 case -NFS4ERR_WRONGSEC:
2823 if (client != *clnt)
2826 client = nfs4_create_sec_client(client, dir, name);
2828 return PTR_ERR(client);
2830 exception.retry = 1;
2833 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2835 } while (exception.retry);
2840 else if (client != *clnt)
2841 rpc_shutdown_client(client);
2846 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2847 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2850 struct rpc_clnt *client = NFS_CLIENT(dir);
2852 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2853 if (client != NFS_CLIENT(dir)) {
2854 rpc_shutdown_client(client);
2855 nfs_fixup_secinfo_attributes(fattr);
2861 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2862 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2865 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2867 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2869 rpc_shutdown_client(client);
2870 return ERR_PTR(status);
2875 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2877 struct nfs_server *server = NFS_SERVER(inode);
2878 struct nfs4_accessargs args = {
2879 .fh = NFS_FH(inode),
2880 .bitmask = server->cache_consistency_bitmask,
2882 struct nfs4_accessres res = {
2885 struct rpc_message msg = {
2886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2889 .rpc_cred = entry->cred,
2891 int mode = entry->mask;
2895 * Determine which access bits we want to ask for...
2897 if (mode & MAY_READ)
2898 args.access |= NFS4_ACCESS_READ;
2899 if (S_ISDIR(inode->i_mode)) {
2900 if (mode & MAY_WRITE)
2901 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2902 if (mode & MAY_EXEC)
2903 args.access |= NFS4_ACCESS_LOOKUP;
2905 if (mode & MAY_WRITE)
2906 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2907 if (mode & MAY_EXEC)
2908 args.access |= NFS4_ACCESS_EXECUTE;
2911 res.fattr = nfs_alloc_fattr();
2912 if (res.fattr == NULL)
2915 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2917 nfs_access_set_mask(entry, res.access);
2918 nfs_refresh_inode(inode, res.fattr);
2920 nfs_free_fattr(res.fattr);
2924 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2926 struct nfs4_exception exception = { };
2929 err = nfs4_handle_exception(NFS_SERVER(inode),
2930 _nfs4_proc_access(inode, entry),
2932 } while (exception.retry);
2937 * TODO: For the time being, we don't try to get any attributes
2938 * along with any of the zero-copy operations READ, READDIR,
2941 * In the case of the first three, we want to put the GETATTR
2942 * after the read-type operation -- this is because it is hard
2943 * to predict the length of a GETATTR response in v4, and thus
2944 * align the READ data correctly. This means that the GETATTR
2945 * may end up partially falling into the page cache, and we should
2946 * shift it into the 'tail' of the xdr_buf before processing.
2947 * To do this efficiently, we need to know the total length
2948 * of data received, which doesn't seem to be available outside
2951 * In the case of WRITE, we also want to put the GETATTR after
2952 * the operation -- in this case because we want to make sure
2953 * we get the post-operation mtime and size.
2955 * Both of these changes to the XDR layer would in fact be quite
2956 * minor, but I decided to leave them for a subsequent patch.
2958 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2959 unsigned int pgbase, unsigned int pglen)
2961 struct nfs4_readlink args = {
2962 .fh = NFS_FH(inode),
2967 struct nfs4_readlink_res res;
2968 struct rpc_message msg = {
2969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2974 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2977 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2978 unsigned int pgbase, unsigned int pglen)
2980 struct nfs4_exception exception = { };
2983 err = nfs4_handle_exception(NFS_SERVER(inode),
2984 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2986 } while (exception.retry);
2991 * This is just for mknod. open(O_CREAT) will always do ->open_context().
2994 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2997 struct nfs_open_context *ctx;
2998 struct nfs4_state *state;
3001 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3003 return PTR_ERR(ctx);
3005 sattr->ia_mode &= ~current_umask();
3006 state = nfs4_do_open(dir, dentry, ctx->mode,
3007 flags, sattr, ctx->cred,
3008 &ctx->mdsthreshold);
3010 if (IS_ERR(state)) {
3011 status = PTR_ERR(state);
3014 d_add(dentry, igrab(state->inode));
3015 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
3018 put_nfs_open_context(ctx);
3022 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3024 struct nfs_server *server = NFS_SERVER(dir);
3025 struct nfs_removeargs args = {
3029 struct nfs_removeres res = {
3032 struct rpc_message msg = {
3033 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3039 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3041 update_changeattr(dir, &res.cinfo);
3045 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3047 struct nfs4_exception exception = { };
3050 err = nfs4_handle_exception(NFS_SERVER(dir),
3051 _nfs4_proc_remove(dir, name),
3053 } while (exception.retry);
3057 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3059 struct nfs_server *server = NFS_SERVER(dir);
3060 struct nfs_removeargs *args = msg->rpc_argp;
3061 struct nfs_removeres *res = msg->rpc_resp;
3063 res->server = server;
3064 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3065 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
3068 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3070 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
3071 &data->args.seq_args,
3075 rpc_call_start(task);
3078 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3080 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3082 if (!nfs4_sequence_done(task, &res->seq_res))
3084 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3086 update_changeattr(dir, &res->cinfo);
3090 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3092 struct nfs_server *server = NFS_SERVER(dir);
3093 struct nfs_renameargs *arg = msg->rpc_argp;
3094 struct nfs_renameres *res = msg->rpc_resp;
3096 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3097 res->server = server;
3098 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
3101 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3103 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3104 &data->args.seq_args,
3108 rpc_call_start(task);
3111 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3112 struct inode *new_dir)
3114 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3116 if (!nfs4_sequence_done(task, &res->seq_res))
3118 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3121 update_changeattr(old_dir, &res->old_cinfo);
3122 update_changeattr(new_dir, &res->new_cinfo);
3126 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3127 struct inode *new_dir, struct qstr *new_name)
3129 struct nfs_server *server = NFS_SERVER(old_dir);
3130 struct nfs_renameargs arg = {
3131 .old_dir = NFS_FH(old_dir),
3132 .new_dir = NFS_FH(new_dir),
3133 .old_name = old_name,
3134 .new_name = new_name,
3136 struct nfs_renameres res = {
3139 struct rpc_message msg = {
3140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3144 int status = -ENOMEM;
3146 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3148 update_changeattr(old_dir, &res.old_cinfo);
3149 update_changeattr(new_dir, &res.new_cinfo);
3154 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3155 struct inode *new_dir, struct qstr *new_name)
3157 struct nfs4_exception exception = { };
3160 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3161 _nfs4_proc_rename(old_dir, old_name,
3164 } while (exception.retry);
3168 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3170 struct nfs_server *server = NFS_SERVER(inode);
3171 struct nfs4_link_arg arg = {
3172 .fh = NFS_FH(inode),
3173 .dir_fh = NFS_FH(dir),
3175 .bitmask = server->attr_bitmask,
3177 struct nfs4_link_res res = {
3180 struct rpc_message msg = {
3181 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3185 int status = -ENOMEM;
3187 res.fattr = nfs_alloc_fattr();
3188 if (res.fattr == NULL)
3191 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3193 update_changeattr(dir, &res.cinfo);
3194 nfs_post_op_update_inode(inode, res.fattr);
3197 nfs_free_fattr(res.fattr);
3201 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3203 struct nfs4_exception exception = { };
3206 err = nfs4_handle_exception(NFS_SERVER(inode),
3207 _nfs4_proc_link(inode, dir, name),
3209 } while (exception.retry);
3213 struct nfs4_createdata {
3214 struct rpc_message msg;
3215 struct nfs4_create_arg arg;
3216 struct nfs4_create_res res;
3218 struct nfs_fattr fattr;
3221 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3222 struct qstr *name, struct iattr *sattr, u32 ftype)
3224 struct nfs4_createdata *data;
3226 data = kzalloc(sizeof(*data), GFP_KERNEL);
3228 struct nfs_server *server = NFS_SERVER(dir);
3230 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3231 data->msg.rpc_argp = &data->arg;
3232 data->msg.rpc_resp = &data->res;
3233 data->arg.dir_fh = NFS_FH(dir);
3234 data->arg.server = server;
3235 data->arg.name = name;
3236 data->arg.attrs = sattr;
3237 data->arg.ftype = ftype;
3238 data->arg.bitmask = server->attr_bitmask;
3239 data->res.server = server;
3240 data->res.fh = &data->fh;
3241 data->res.fattr = &data->fattr;
3242 nfs_fattr_init(data->res.fattr);
3247 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3249 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3250 &data->arg.seq_args, &data->res.seq_res, 1);
3252 update_changeattr(dir, &data->res.dir_cinfo);
3253 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3258 static void nfs4_free_createdata(struct nfs4_createdata *data)
3263 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3264 struct page *page, unsigned int len, struct iattr *sattr)
3266 struct nfs4_createdata *data;
3267 int status = -ENAMETOOLONG;
3269 if (len > NFS4_MAXPATHLEN)
3273 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3277 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3278 data->arg.u.symlink.pages = &page;
3279 data->arg.u.symlink.len = len;
3281 status = nfs4_do_create(dir, dentry, data);
3283 nfs4_free_createdata(data);
3288 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3289 struct page *page, unsigned int len, struct iattr *sattr)
3291 struct nfs4_exception exception = { };
3294 err = nfs4_handle_exception(NFS_SERVER(dir),
3295 _nfs4_proc_symlink(dir, dentry, page,
3298 } while (exception.retry);
3302 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3303 struct iattr *sattr)
3305 struct nfs4_createdata *data;
3306 int status = -ENOMEM;
3308 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3312 status = nfs4_do_create(dir, dentry, data);
3314 nfs4_free_createdata(data);
3319 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3320 struct iattr *sattr)
3322 struct nfs4_exception exception = { };
3325 sattr->ia_mode &= ~current_umask();
3327 err = nfs4_handle_exception(NFS_SERVER(dir),
3328 _nfs4_proc_mkdir(dir, dentry, sattr),
3330 } while (exception.retry);
3334 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3335 u64 cookie, struct page **pages, unsigned int count, int plus)
3337 struct inode *dir = dentry->d_inode;
3338 struct nfs4_readdir_arg args = {
3343 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3346 struct nfs4_readdir_res res;
3347 struct rpc_message msg = {
3348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3355 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3356 dentry->d_parent->d_name.name,
3357 dentry->d_name.name,
3358 (unsigned long long)cookie);
3359 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3360 res.pgbase = args.pgbase;
3361 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3363 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3364 status += args.pgbase;
3367 nfs_invalidate_atime(dir);
3369 dprintk("%s: returns %d\n", __func__, status);
3373 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3374 u64 cookie, struct page **pages, unsigned int count, int plus)
3376 struct nfs4_exception exception = { };
3379 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3380 _nfs4_proc_readdir(dentry, cred, cookie,
3381 pages, count, plus),
3383 } while (exception.retry);
3387 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3388 struct iattr *sattr, dev_t rdev)
3390 struct nfs4_createdata *data;
3391 int mode = sattr->ia_mode;
3392 int status = -ENOMEM;
3394 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3399 data->arg.ftype = NF4FIFO;
3400 else if (S_ISBLK(mode)) {
3401 data->arg.ftype = NF4BLK;
3402 data->arg.u.device.specdata1 = MAJOR(rdev);
3403 data->arg.u.device.specdata2 = MINOR(rdev);
3405 else if (S_ISCHR(mode)) {
3406 data->arg.ftype = NF4CHR;
3407 data->arg.u.device.specdata1 = MAJOR(rdev);
3408 data->arg.u.device.specdata2 = MINOR(rdev);
3409 } else if (!S_ISSOCK(mode)) {
3414 status = nfs4_do_create(dir, dentry, data);
3416 nfs4_free_createdata(data);
3421 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3422 struct iattr *sattr, dev_t rdev)
3424 struct nfs4_exception exception = { };
3427 sattr->ia_mode &= ~current_umask();
3429 err = nfs4_handle_exception(NFS_SERVER(dir),
3430 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3432 } while (exception.retry);
3436 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3437 struct nfs_fsstat *fsstat)
3439 struct nfs4_statfs_arg args = {
3441 .bitmask = server->attr_bitmask,
3443 struct nfs4_statfs_res res = {
3446 struct rpc_message msg = {
3447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3452 nfs_fattr_init(fsstat->fattr);
3453 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3456 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3458 struct nfs4_exception exception = { };
3461 err = nfs4_handle_exception(server,
3462 _nfs4_proc_statfs(server, fhandle, fsstat),
3464 } while (exception.retry);
3468 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3469 struct nfs_fsinfo *fsinfo)
3471 struct nfs4_fsinfo_arg args = {
3473 .bitmask = server->attr_bitmask,
3475 struct nfs4_fsinfo_res res = {
3478 struct rpc_message msg = {
3479 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3484 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3487 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3489 struct nfs4_exception exception = { };
3493 err = nfs4_handle_exception(server,
3494 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3496 } while (exception.retry);
3500 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3504 nfs_fattr_init(fsinfo->fattr);
3505 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3507 /* block layout checks this! */
3508 server->pnfs_blksize = fsinfo->blksize;
3509 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3515 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3516 struct nfs_pathconf *pathconf)
3518 struct nfs4_pathconf_arg args = {
3520 .bitmask = server->attr_bitmask,
3522 struct nfs4_pathconf_res res = {
3523 .pathconf = pathconf,
3525 struct rpc_message msg = {
3526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3531 /* None of the pathconf attributes are mandatory to implement */
3532 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3533 memset(pathconf, 0, sizeof(*pathconf));
3537 nfs_fattr_init(pathconf->fattr);
3538 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3541 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3542 struct nfs_pathconf *pathconf)
3544 struct nfs4_exception exception = { };
3548 err = nfs4_handle_exception(server,
3549 _nfs4_proc_pathconf(server, fhandle, pathconf),
3551 } while (exception.retry);
3555 void __nfs4_read_done_cb(struct nfs_read_data *data)
3557 nfs_invalidate_atime(data->header->inode);
3560 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3562 struct nfs_server *server = NFS_SERVER(data->header->inode);
3564 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3565 rpc_restart_call_prepare(task);
3569 __nfs4_read_done_cb(data);
3570 if (task->tk_status > 0)
3571 renew_lease(server, data->timestamp);
3575 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3578 dprintk("--> %s\n", __func__);
3580 if (!nfs4_sequence_done(task, &data->res.seq_res))
3583 return data->read_done_cb ? data->read_done_cb(task, data) :
3584 nfs4_read_done_cb(task, data);
3587 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3589 data->timestamp = jiffies;
3590 data->read_done_cb = nfs4_read_done_cb;
3591 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3592 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3595 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3597 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3598 &data->args.seq_args,
3602 rpc_call_start(task);
3605 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3607 struct inode *inode = data->header->inode;
3609 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3610 rpc_restart_call_prepare(task);
3613 if (task->tk_status >= 0) {
3614 renew_lease(NFS_SERVER(inode), data->timestamp);
3615 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3620 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3622 if (!nfs4_sequence_done(task, &data->res.seq_res))
3624 return data->write_done_cb ? data->write_done_cb(task, data) :
3625 nfs4_write_done_cb(task, data);
3629 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3631 const struct nfs_pgio_header *hdr = data->header;
3633 /* Don't request attributes for pNFS or O_DIRECT writes */
3634 if (data->ds_clp != NULL || hdr->dreq != NULL)
3636 /* Otherwise, request attributes if and only if we don't hold
3639 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3642 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3644 struct nfs_server *server = NFS_SERVER(data->header->inode);
3646 if (!nfs4_write_need_cache_consistency_data(data)) {
3647 data->args.bitmask = NULL;
3648 data->res.fattr = NULL;
3650 data->args.bitmask = server->cache_consistency_bitmask;
3652 if (!data->write_done_cb)
3653 data->write_done_cb = nfs4_write_done_cb;
3654 data->res.server = server;
3655 data->timestamp = jiffies;
3657 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3658 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3661 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3663 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3664 &data->args.seq_args,
3668 rpc_call_start(task);
3671 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3673 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3674 &data->args.seq_args,
3678 rpc_call_start(task);
3681 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3683 struct inode *inode = data->inode;
3685 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3686 rpc_restart_call_prepare(task);
3692 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3694 if (!nfs4_sequence_done(task, &data->res.seq_res))
3696 return data->commit_done_cb(task, data);
3699 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3701 struct nfs_server *server = NFS_SERVER(data->inode);
3703 if (data->commit_done_cb == NULL)
3704 data->commit_done_cb = nfs4_commit_done_cb;
3705 data->res.server = server;
3706 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3707 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3710 struct nfs4_renewdata {
3711 struct nfs_client *client;
3712 unsigned long timestamp;
3716 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3717 * standalone procedure for queueing an asynchronous RENEW.
3719 static void nfs4_renew_release(void *calldata)
3721 struct nfs4_renewdata *data = calldata;
3722 struct nfs_client *clp = data->client;
3724 if (atomic_read(&clp->cl_count) > 1)
3725 nfs4_schedule_state_renewal(clp);
3726 nfs_put_client(clp);
3730 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3732 struct nfs4_renewdata *data = calldata;
3733 struct nfs_client *clp = data->client;
3734 unsigned long timestamp = data->timestamp;
3736 if (task->tk_status < 0) {
3737 /* Unless we're shutting down, schedule state recovery! */
3738 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3740 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3741 nfs4_schedule_lease_recovery(clp);
3744 nfs4_schedule_path_down_recovery(clp);
3746 do_renew_lease(clp, timestamp);
3749 static const struct rpc_call_ops nfs4_renew_ops = {
3750 .rpc_call_done = nfs4_renew_done,
3751 .rpc_release = nfs4_renew_release,
3754 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3756 struct rpc_message msg = {
3757 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3761 struct nfs4_renewdata *data;
3763 if (renew_flags == 0)
3765 if (!atomic_inc_not_zero(&clp->cl_count))
3767 data = kmalloc(sizeof(*data), GFP_NOFS);
3771 data->timestamp = jiffies;
3772 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3773 &nfs4_renew_ops, data);
3776 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3778 struct rpc_message msg = {
3779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3783 unsigned long now = jiffies;
3786 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3789 do_renew_lease(clp, now);
3793 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3795 return (server->caps & NFS_CAP_ACLS)
3796 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3797 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3800 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3801 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3804 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3806 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3807 struct page **pages, unsigned int *pgbase)
3809 struct page *newpage, **spages;
3815 len = min_t(size_t, PAGE_SIZE, buflen);
3816 newpage = alloc_page(GFP_KERNEL);
3818 if (newpage == NULL)
3820 memcpy(page_address(newpage), buf, len);
3825 } while (buflen != 0);
3831 __free_page(spages[rc-1]);
3835 struct nfs4_cached_acl {
3841 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3843 struct nfs_inode *nfsi = NFS_I(inode);
3845 spin_lock(&inode->i_lock);
3846 kfree(nfsi->nfs4_acl);
3847 nfsi->nfs4_acl = acl;
3848 spin_unlock(&inode->i_lock);
3851 static void nfs4_zap_acl_attr(struct inode *inode)
3853 nfs4_set_cached_acl(inode, NULL);
3856 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3858 struct nfs_inode *nfsi = NFS_I(inode);
3859 struct nfs4_cached_acl *acl;
3862 spin_lock(&inode->i_lock);
3863 acl = nfsi->nfs4_acl;
3866 if (buf == NULL) /* user is just asking for length */
3868 if (acl->cached == 0)
3870 ret = -ERANGE; /* see getxattr(2) man page */
3871 if (acl->len > buflen)
3873 memcpy(buf, acl->data, acl->len);
3877 spin_unlock(&inode->i_lock);
3881 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3883 struct nfs4_cached_acl *acl;
3884 size_t buflen = sizeof(*acl) + acl_len;
3886 if (buflen <= PAGE_SIZE) {
3887 acl = kmalloc(buflen, GFP_KERNEL);
3891 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3893 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3900 nfs4_set_cached_acl(inode, acl);
3904 * The getxattr API returns the required buffer length when called with a
3905 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3906 * the required buf. On a NULL buf, we send a page of data to the server
3907 * guessing that the ACL request can be serviced by a page. If so, we cache
3908 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3909 * the cache. If not so, we throw away the page, and cache the required
3910 * length. The next getxattr call will then produce another round trip to
3911 * the server, this time with the input buf of the required size.
3913 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3915 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3916 struct nfs_getaclargs args = {
3917 .fh = NFS_FH(inode),
3921 struct nfs_getaclres res = {
3924 struct rpc_message msg = {
3925 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3929 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3930 int ret = -ENOMEM, i;
3932 /* As long as we're doing a round trip to the server anyway,
3933 * let's be prepared for a page of acl data. */
3936 if (npages > ARRAY_SIZE(pages))
3939 for (i = 0; i < npages; i++) {
3940 pages[i] = alloc_page(GFP_KERNEL);
3945 /* for decoding across pages */
3946 res.acl_scratch = alloc_page(GFP_KERNEL);
3947 if (!res.acl_scratch)
3950 args.acl_len = npages * PAGE_SIZE;
3951 args.acl_pgbase = 0;
3953 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3954 __func__, buf, buflen, npages, args.acl_len);
3955 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3956 &msg, &args.seq_args, &res.seq_res, 0);
3960 /* Handle the case where the passed-in buffer is too short */
3961 if (res.acl_flags & NFS4_ACL_TRUNC) {
3962 /* Did the user only issue a request for the acl length? */
3968 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3970 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3974 for (i = 0; i < npages; i++)
3976 __free_page(pages[i]);
3977 if (res.acl_scratch)
3978 __free_page(res.acl_scratch);
3982 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3984 struct nfs4_exception exception = { };
3987 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3990 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3991 } while (exception.retry);
3995 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3997 struct nfs_server *server = NFS_SERVER(inode);
4000 if (!nfs4_server_supports_acls(server))
4002 ret = nfs_revalidate_inode(server, inode);
4005 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4006 nfs_zap_acl_cache(inode);
4007 ret = nfs4_read_cached_acl(inode, buf, buflen);
4009 /* -ENOENT is returned if there is no ACL or if there is an ACL
4010 * but no cached acl data, just the acl length */
4012 return nfs4_get_acl_uncached(inode, buf, buflen);
4015 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4017 struct nfs_server *server = NFS_SERVER(inode);
4018 struct page *pages[NFS4ACL_MAXPAGES];
4019 struct nfs_setaclargs arg = {
4020 .fh = NFS_FH(inode),
4024 struct nfs_setaclres res;
4025 struct rpc_message msg = {
4026 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4030 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4033 if (!nfs4_server_supports_acls(server))
4035 if (npages > ARRAY_SIZE(pages))
4037 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4040 nfs4_inode_return_delegation(inode);
4041 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4044 * Free each page after tx, so the only ref left is
4045 * held by the network stack
4048 put_page(pages[i-1]);
4051 * Acl update can result in inode attribute update.
4052 * so mark the attribute cache invalid.
4054 spin_lock(&inode->i_lock);
4055 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4056 spin_unlock(&inode->i_lock);
4057 nfs_access_zap_cache(inode);
4058 nfs_zap_acl_cache(inode);
4062 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4064 struct nfs4_exception exception = { };
4067 err = nfs4_handle_exception(NFS_SERVER(inode),
4068 __nfs4_proc_set_acl(inode, buf, buflen),
4070 } while (exception.retry);
4075 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
4077 struct nfs_client *clp = server->nfs_client;
4079 if (task->tk_status >= 0)
4081 switch(task->tk_status) {
4082 case -NFS4ERR_DELEG_REVOKED:
4083 case -NFS4ERR_ADMIN_REVOKED:
4084 case -NFS4ERR_BAD_STATEID:
4087 nfs_remove_bad_delegation(state->inode);
4088 case -NFS4ERR_OPENMODE:
4091 nfs4_schedule_stateid_recovery(server, state);
4092 goto wait_on_recovery;
4093 case -NFS4ERR_EXPIRED:
4095 nfs4_schedule_stateid_recovery(server, state);
4096 case -NFS4ERR_STALE_STATEID:
4097 case -NFS4ERR_STALE_CLIENTID:
4098 nfs4_schedule_lease_recovery(clp);
4099 goto wait_on_recovery;
4100 #if defined(CONFIG_NFS_V4_1)
4101 case -NFS4ERR_BADSESSION:
4102 case -NFS4ERR_BADSLOT:
4103 case -NFS4ERR_BAD_HIGH_SLOT:
4104 case -NFS4ERR_DEADSESSION:
4105 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4106 case -NFS4ERR_SEQ_FALSE_RETRY:
4107 case -NFS4ERR_SEQ_MISORDERED:
4108 dprintk("%s ERROR %d, Reset session\n", __func__,
4110 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4111 task->tk_status = 0;
4113 #endif /* CONFIG_NFS_V4_1 */
4114 case -NFS4ERR_DELAY:
4115 nfs_inc_server_stats(server, NFSIOS_DELAY);
4116 case -NFS4ERR_GRACE:
4118 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4119 task->tk_status = 0;
4121 case -NFS4ERR_RETRY_UNCACHED_REP:
4122 case -NFS4ERR_OLD_STATEID:
4123 task->tk_status = 0;
4126 task->tk_status = nfs4_map_errors(task->tk_status);
4129 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4130 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4131 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4132 task->tk_status = 0;
4136 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4137 nfs4_verifier *bootverf)
4141 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4142 /* An impossible timestamp guarantees this value
4143 * will never match a generated boot time. */
4145 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4147 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4148 verf[0] = (__be32)nn->boot_time.tv_sec;
4149 verf[1] = (__be32)nn->boot_time.tv_nsec;
4151 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4155 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4156 char *buf, size_t len)
4158 unsigned int result;
4161 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4163 rpc_peeraddr2str(clp->cl_rpcclient,
4165 rpc_peeraddr2str(clp->cl_rpcclient,
4166 RPC_DISPLAY_PROTO));
4172 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4173 char *buf, size_t len)
4175 char *nodename = clp->cl_rpcclient->cl_nodename;
4177 if (nfs4_client_id_uniquifier[0] != '\0')
4178 nodename = nfs4_client_id_uniquifier;
4179 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4180 clp->rpc_ops->version, clp->cl_minorversion,
4185 * nfs4_proc_setclientid - Negotiate client ID
4186 * @clp: state data structure
4187 * @program: RPC program for NFSv4 callback service
4188 * @port: IP port number for NFS4 callback service
4189 * @cred: RPC credential to use for this call
4190 * @res: where to place the result
4192 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4194 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4195 unsigned short port, struct rpc_cred *cred,
4196 struct nfs4_setclientid_res *res)
4198 nfs4_verifier sc_verifier;
4199 struct nfs4_setclientid setclientid = {
4200 .sc_verifier = &sc_verifier,
4202 .sc_cb_ident = clp->cl_cb_ident,
4204 struct rpc_message msg = {
4205 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4206 .rpc_argp = &setclientid,
4212 /* nfs_client_id4 */
4213 nfs4_init_boot_verifier(clp, &sc_verifier);
4214 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4215 setclientid.sc_name_len =
4216 nfs4_init_uniform_client_string(clp,
4217 setclientid.sc_name,
4218 sizeof(setclientid.sc_name));
4220 setclientid.sc_name_len =
4221 nfs4_init_nonuniform_client_string(clp,
4222 setclientid.sc_name,
4223 sizeof(setclientid.sc_name));
4226 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4227 sizeof(setclientid.sc_netid),
4228 rpc_peeraddr2str(clp->cl_rpcclient,
4229 RPC_DISPLAY_NETID));
4231 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4232 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4233 clp->cl_ipaddr, port >> 8, port & 255);
4235 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4236 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4237 setclientid.sc_name_len, setclientid.sc_name);
4238 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4239 dprintk("NFS reply setclientid: %d\n", status);
4244 * nfs4_proc_setclientid_confirm - Confirm client ID
4245 * @clp: state data structure
4246 * @res: result of a previous SETCLIENTID
4247 * @cred: RPC credential to use for this call
4249 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4251 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4252 struct nfs4_setclientid_res *arg,
4253 struct rpc_cred *cred)
4255 struct nfs_fsinfo fsinfo;
4256 struct rpc_message msg = {
4257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4259 .rpc_resp = &fsinfo,
4265 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4266 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4269 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4271 spin_lock(&clp->cl_lock);
4272 clp->cl_lease_time = fsinfo.lease_time * HZ;
4273 clp->cl_last_renewal = now;
4274 spin_unlock(&clp->cl_lock);
4276 dprintk("NFS reply setclientid_confirm: %d\n", status);
4280 struct nfs4_delegreturndata {
4281 struct nfs4_delegreturnargs args;
4282 struct nfs4_delegreturnres res;
4284 nfs4_stateid stateid;
4285 unsigned long timestamp;
4286 struct nfs_fattr fattr;
4290 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4292 struct nfs4_delegreturndata *data = calldata;
4294 if (!nfs4_sequence_done(task, &data->res.seq_res))
4297 switch (task->tk_status) {
4298 case -NFS4ERR_STALE_STATEID:
4299 case -NFS4ERR_EXPIRED:
4301 renew_lease(data->res.server, data->timestamp);
4304 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4306 rpc_restart_call_prepare(task);
4310 data->rpc_status = task->tk_status;
4313 static void nfs4_delegreturn_release(void *calldata)
4318 #if defined(CONFIG_NFS_V4_1)
4319 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4321 struct nfs4_delegreturndata *d_data;
4323 d_data = (struct nfs4_delegreturndata *)data;
4325 if (nfs4_setup_sequence(d_data->res.server,
4326 &d_data->args.seq_args,
4327 &d_data->res.seq_res, task))
4329 rpc_call_start(task);
4331 #endif /* CONFIG_NFS_V4_1 */
4333 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4334 #if defined(CONFIG_NFS_V4_1)
4335 .rpc_call_prepare = nfs4_delegreturn_prepare,
4336 #endif /* CONFIG_NFS_V4_1 */
4337 .rpc_call_done = nfs4_delegreturn_done,
4338 .rpc_release = nfs4_delegreturn_release,
4341 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4343 struct nfs4_delegreturndata *data;
4344 struct nfs_server *server = NFS_SERVER(inode);
4345 struct rpc_task *task;
4346 struct rpc_message msg = {
4347 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4350 struct rpc_task_setup task_setup_data = {
4351 .rpc_client = server->client,
4352 .rpc_message = &msg,
4353 .callback_ops = &nfs4_delegreturn_ops,
4354 .flags = RPC_TASK_ASYNC,
4358 data = kzalloc(sizeof(*data), GFP_NOFS);
4361 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4362 data->args.fhandle = &data->fh;
4363 data->args.stateid = &data->stateid;
4364 data->args.bitmask = server->cache_consistency_bitmask;
4365 nfs_copy_fh(&data->fh, NFS_FH(inode));
4366 nfs4_stateid_copy(&data->stateid, stateid);
4367 data->res.fattr = &data->fattr;
4368 data->res.server = server;
4369 nfs_fattr_init(data->res.fattr);
4370 data->timestamp = jiffies;
4371 data->rpc_status = 0;
4373 task_setup_data.callback_data = data;
4374 msg.rpc_argp = &data->args;
4375 msg.rpc_resp = &data->res;
4376 task = rpc_run_task(&task_setup_data);
4378 return PTR_ERR(task);
4381 status = nfs4_wait_for_completion_rpc_task(task);
4384 status = data->rpc_status;
4386 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4388 nfs_refresh_inode(inode, &data->fattr);
4394 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4396 struct nfs_server *server = NFS_SERVER(inode);
4397 struct nfs4_exception exception = { };
4400 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4402 case -NFS4ERR_STALE_STATEID:
4403 case -NFS4ERR_EXPIRED:
4407 err = nfs4_handle_exception(server, err, &exception);
4408 } while (exception.retry);
4412 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4413 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4416 * sleep, with exponential backoff, and retry the LOCK operation.
4418 static unsigned long
4419 nfs4_set_lock_task_retry(unsigned long timeout)
4421 freezable_schedule_timeout_killable(timeout);
4423 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4424 return NFS4_LOCK_MAXTIMEOUT;
4428 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4430 struct inode *inode = state->inode;
4431 struct nfs_server *server = NFS_SERVER(inode);
4432 struct nfs_client *clp = server->nfs_client;
4433 struct nfs_lockt_args arg = {
4434 .fh = NFS_FH(inode),
4437 struct nfs_lockt_res res = {
4440 struct rpc_message msg = {
4441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4444 .rpc_cred = state->owner->so_cred,
4446 struct nfs4_lock_state *lsp;
4449 arg.lock_owner.clientid = clp->cl_clientid;
4450 status = nfs4_set_lock_state(state, request);
4453 lsp = request->fl_u.nfs4_fl.owner;
4454 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4455 arg.lock_owner.s_dev = server->s_dev;
4456 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4459 request->fl_type = F_UNLCK;
4461 case -NFS4ERR_DENIED:
4464 request->fl_ops->fl_release_private(request);
4469 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4471 struct nfs4_exception exception = { };
4475 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4476 _nfs4_proc_getlk(state, cmd, request),
4478 } while (exception.retry);
4482 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4485 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4487 res = posix_lock_file_wait(file, fl);
4490 res = flock_lock_file_wait(file, fl);
4498 struct nfs4_unlockdata {
4499 struct nfs_locku_args arg;
4500 struct nfs_locku_res res;
4501 struct nfs4_lock_state *lsp;
4502 struct nfs_open_context *ctx;
4503 struct file_lock fl;
4504 const struct nfs_server *server;
4505 unsigned long timestamp;
4508 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4509 struct nfs_open_context *ctx,
4510 struct nfs4_lock_state *lsp,
4511 struct nfs_seqid *seqid)
4513 struct nfs4_unlockdata *p;
4514 struct inode *inode = lsp->ls_state->inode;
4516 p = kzalloc(sizeof(*p), GFP_NOFS);
4519 p->arg.fh = NFS_FH(inode);
4521 p->arg.seqid = seqid;
4522 p->res.seqid = seqid;
4523 p->arg.stateid = &lsp->ls_stateid;
4525 atomic_inc(&lsp->ls_count);
4526 /* Ensure we don't close file until we're done freeing locks! */
4527 p->ctx = get_nfs_open_context(ctx);
4528 memcpy(&p->fl, fl, sizeof(p->fl));
4529 p->server = NFS_SERVER(inode);
4533 static void nfs4_locku_release_calldata(void *data)
4535 struct nfs4_unlockdata *calldata = data;
4536 nfs_free_seqid(calldata->arg.seqid);
4537 nfs4_put_lock_state(calldata->lsp);
4538 put_nfs_open_context(calldata->ctx);
4542 static void nfs4_locku_done(struct rpc_task *task, void *data)
4544 struct nfs4_unlockdata *calldata = data;
4546 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4548 switch (task->tk_status) {
4550 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4551 &calldata->res.stateid);
4552 renew_lease(calldata->server, calldata->timestamp);
4554 case -NFS4ERR_BAD_STATEID:
4555 case -NFS4ERR_OLD_STATEID:
4556 case -NFS4ERR_STALE_STATEID:
4557 case -NFS4ERR_EXPIRED:
4560 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4561 rpc_restart_call_prepare(task);
4563 nfs_release_seqid(calldata->arg.seqid);
4566 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4568 struct nfs4_unlockdata *calldata = data;
4570 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4572 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
4573 /* Note: exit _without_ running nfs4_locku_done */
4574 task->tk_action = NULL;
4577 calldata->timestamp = jiffies;
4578 if (nfs4_setup_sequence(calldata->server,
4579 &calldata->arg.seq_args,
4580 &calldata->res.seq_res,
4582 nfs_release_seqid(calldata->arg.seqid);
4584 rpc_call_start(task);
4587 static const struct rpc_call_ops nfs4_locku_ops = {
4588 .rpc_call_prepare = nfs4_locku_prepare,
4589 .rpc_call_done = nfs4_locku_done,
4590 .rpc_release = nfs4_locku_release_calldata,
4593 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4594 struct nfs_open_context *ctx,
4595 struct nfs4_lock_state *lsp,
4596 struct nfs_seqid *seqid)
4598 struct nfs4_unlockdata *data;
4599 struct rpc_message msg = {
4600 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4601 .rpc_cred = ctx->cred,
4603 struct rpc_task_setup task_setup_data = {
4604 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4605 .rpc_message = &msg,
4606 .callback_ops = &nfs4_locku_ops,
4607 .workqueue = nfsiod_workqueue,
4608 .flags = RPC_TASK_ASYNC,
4611 /* Ensure this is an unlock - when canceling a lock, the
4612 * canceled lock is passed in, and it won't be an unlock.
4614 fl->fl_type = F_UNLCK;
4616 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4618 nfs_free_seqid(seqid);
4619 return ERR_PTR(-ENOMEM);
4622 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4623 msg.rpc_argp = &data->arg;
4624 msg.rpc_resp = &data->res;
4625 task_setup_data.callback_data = data;
4626 return rpc_run_task(&task_setup_data);
4629 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4631 struct nfs_inode *nfsi = NFS_I(state->inode);
4632 struct nfs_seqid *seqid;
4633 struct nfs4_lock_state *lsp;
4634 struct rpc_task *task;
4636 unsigned char fl_flags = request->fl_flags;
4638 status = nfs4_set_lock_state(state, request);
4639 /* Unlock _before_ we do the RPC call */
4640 request->fl_flags |= FL_EXISTS;
4641 down_read(&nfsi->rwsem);
4642 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4643 up_read(&nfsi->rwsem);
4646 up_read(&nfsi->rwsem);
4649 /* Is this a delegated lock? */
4650 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4652 lsp = request->fl_u.nfs4_fl.owner;
4653 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4657 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4658 status = PTR_ERR(task);
4661 status = nfs4_wait_for_completion_rpc_task(task);
4664 request->fl_flags = fl_flags;
4668 struct nfs4_lockdata {
4669 struct nfs_lock_args arg;
4670 struct nfs_lock_res res;
4671 struct nfs4_lock_state *lsp;
4672 struct nfs_open_context *ctx;
4673 struct file_lock fl;
4674 unsigned long timestamp;
4677 struct nfs_server *server;
4680 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4681 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4684 struct nfs4_lockdata *p;
4685 struct inode *inode = lsp->ls_state->inode;
4686 struct nfs_server *server = NFS_SERVER(inode);
4688 p = kzalloc(sizeof(*p), gfp_mask);
4692 p->arg.fh = NFS_FH(inode);
4694 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4695 if (p->arg.open_seqid == NULL)
4697 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4698 if (p->arg.lock_seqid == NULL)
4699 goto out_free_seqid;
4700 p->arg.lock_stateid = &lsp->ls_stateid;
4701 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4702 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4703 p->arg.lock_owner.s_dev = server->s_dev;
4704 p->res.lock_seqid = p->arg.lock_seqid;
4707 atomic_inc(&lsp->ls_count);
4708 p->ctx = get_nfs_open_context(ctx);
4709 memcpy(&p->fl, fl, sizeof(p->fl));
4712 nfs_free_seqid(p->arg.open_seqid);
4718 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4720 struct nfs4_lockdata *data = calldata;
4721 struct nfs4_state *state = data->lsp->ls_state;
4723 dprintk("%s: begin!\n", __func__);
4724 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4726 /* Do we need to do an open_to_lock_owner? */
4727 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4728 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4729 goto out_release_lock_seqid;
4730 data->arg.open_stateid = &state->stateid;
4731 data->arg.new_lock_owner = 1;
4732 data->res.open_seqid = data->arg.open_seqid;
4734 data->arg.new_lock_owner = 0;
4735 data->timestamp = jiffies;
4736 if (nfs4_setup_sequence(data->server,
4737 &data->arg.seq_args,
4740 rpc_call_start(task);
4743 nfs_release_seqid(data->arg.open_seqid);
4744 out_release_lock_seqid:
4745 nfs_release_seqid(data->arg.lock_seqid);
4746 dprintk("%s: done!, ret = %d\n", __func__, task->tk_status);
4749 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4751 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4752 nfs4_lock_prepare(task, calldata);
4755 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4757 struct nfs4_lockdata *data = calldata;
4759 dprintk("%s: begin!\n", __func__);
4761 if (!nfs4_sequence_done(task, &data->res.seq_res))
4764 data->rpc_status = task->tk_status;
4765 if (data->arg.new_lock_owner != 0) {
4766 if (data->rpc_status == 0)
4767 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4771 if (data->rpc_status == 0) {
4772 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4773 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
4774 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4777 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4780 static void nfs4_lock_release(void *calldata)
4782 struct nfs4_lockdata *data = calldata;
4784 dprintk("%s: begin!\n", __func__);
4785 nfs_free_seqid(data->arg.open_seqid);
4786 if (data->cancelled != 0) {
4787 struct rpc_task *task;
4788 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4789 data->arg.lock_seqid);
4791 rpc_put_task_async(task);
4792 dprintk("%s: cancelling lock!\n", __func__);
4794 nfs_free_seqid(data->arg.lock_seqid);
4795 nfs4_put_lock_state(data->lsp);
4796 put_nfs_open_context(data->ctx);
4798 dprintk("%s: done!\n", __func__);
4801 static const struct rpc_call_ops nfs4_lock_ops = {
4802 .rpc_call_prepare = nfs4_lock_prepare,
4803 .rpc_call_done = nfs4_lock_done,
4804 .rpc_release = nfs4_lock_release,
4807 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4808 .rpc_call_prepare = nfs4_recover_lock_prepare,
4809 .rpc_call_done = nfs4_lock_done,
4810 .rpc_release = nfs4_lock_release,
4813 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4816 case -NFS4ERR_ADMIN_REVOKED:
4817 case -NFS4ERR_BAD_STATEID:
4818 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4819 if (new_lock_owner != 0 ||
4820 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
4821 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4823 case -NFS4ERR_STALE_STATEID:
4824 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4825 case -NFS4ERR_EXPIRED:
4826 nfs4_schedule_lease_recovery(server->nfs_client);
4830 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4832 struct nfs4_lockdata *data;
4833 struct rpc_task *task;
4834 struct rpc_message msg = {
4835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4836 .rpc_cred = state->owner->so_cred,
4838 struct rpc_task_setup task_setup_data = {
4839 .rpc_client = NFS_CLIENT(state->inode),
4840 .rpc_message = &msg,
4841 .callback_ops = &nfs4_lock_ops,
4842 .workqueue = nfsiod_workqueue,
4843 .flags = RPC_TASK_ASYNC,
4847 dprintk("%s: begin!\n", __func__);
4848 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4849 fl->fl_u.nfs4_fl.owner,
4850 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4854 data->arg.block = 1;
4855 if (recovery_type > NFS_LOCK_NEW) {
4856 if (recovery_type == NFS_LOCK_RECLAIM)
4857 data->arg.reclaim = NFS_LOCK_RECLAIM;
4858 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4860 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4861 msg.rpc_argp = &data->arg;
4862 msg.rpc_resp = &data->res;
4863 task_setup_data.callback_data = data;
4864 task = rpc_run_task(&task_setup_data);
4866 return PTR_ERR(task);
4867 ret = nfs4_wait_for_completion_rpc_task(task);
4869 ret = data->rpc_status;
4871 nfs4_handle_setlk_error(data->server, data->lsp,
4872 data->arg.new_lock_owner, ret);
4874 data->cancelled = 1;
4876 dprintk("%s: done, ret = %d!\n", __func__, ret);
4880 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4882 struct nfs_server *server = NFS_SERVER(state->inode);
4883 struct nfs4_exception exception = {
4884 .inode = state->inode,
4889 /* Cache the lock if possible... */
4890 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4892 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4893 if (err != -NFS4ERR_DELAY)
4895 nfs4_handle_exception(server, err, &exception);
4896 } while (exception.retry);
4900 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4902 struct nfs_server *server = NFS_SERVER(state->inode);
4903 struct nfs4_exception exception = {
4904 .inode = state->inode,
4908 err = nfs4_set_lock_state(state, request);
4912 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4914 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4918 case -NFS4ERR_GRACE:
4919 case -NFS4ERR_DELAY:
4920 nfs4_handle_exception(server, err, &exception);
4923 } while (exception.retry);
4928 #if defined(CONFIG_NFS_V4_1)
4930 * nfs41_check_expired_locks - possibly free a lock stateid
4932 * @state: NFSv4 state for an inode
4934 * Returns NFS_OK if recovery for this stateid is now finished.
4935 * Otherwise a negative NFS4ERR value is returned.
4937 static int nfs41_check_expired_locks(struct nfs4_state *state)
4939 int status, ret = -NFS4ERR_BAD_STATEID;
4940 struct nfs4_lock_state *lsp;
4941 struct nfs_server *server = NFS_SERVER(state->inode);
4943 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4944 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
4945 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4946 if (status != NFS_OK) {
4947 /* Free the stateid unless the server
4948 * informs us the stateid is unrecognized. */
4949 if (status != -NFS4ERR_BAD_STATEID)
4950 nfs41_free_stateid(server,
4952 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
4961 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4963 int status = NFS_OK;
4965 if (test_bit(LK_STATE_IN_USE, &state->flags))
4966 status = nfs41_check_expired_locks(state);
4967 if (status != NFS_OK)
4968 status = nfs4_lock_expired(state, request);
4973 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4975 struct nfs_inode *nfsi = NFS_I(state->inode);
4976 unsigned char fl_flags = request->fl_flags;
4977 int status = -ENOLCK;
4979 if ((fl_flags & FL_POSIX) &&
4980 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4982 /* Is this a delegated open? */
4983 status = nfs4_set_lock_state(state, request);
4986 request->fl_flags |= FL_ACCESS;
4987 status = do_vfs_lock(request->fl_file, request);
4990 down_read(&nfsi->rwsem);
4991 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4992 /* Yes: cache locks! */
4993 /* ...but avoid races with delegation recall... */
4994 request->fl_flags = fl_flags & ~FL_SLEEP;
4995 status = do_vfs_lock(request->fl_file, request);
4998 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5001 /* Note: we always want to sleep here! */
5002 request->fl_flags = fl_flags | FL_SLEEP;
5003 if (do_vfs_lock(request->fl_file, request) < 0)
5004 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5005 "manager!\n", __func__);
5007 up_read(&nfsi->rwsem);
5009 request->fl_flags = fl_flags;
5013 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5015 struct nfs4_exception exception = {
5017 .inode = state->inode,
5022 err = _nfs4_proc_setlk(state, cmd, request);
5023 if (err == -NFS4ERR_DENIED)
5025 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5027 } while (exception.retry);
5032 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5034 struct nfs_open_context *ctx;
5035 struct nfs4_state *state;
5036 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5039 /* verify open state */
5040 ctx = nfs_file_open_context(filp);
5043 if (request->fl_start < 0 || request->fl_end < 0)
5046 if (IS_GETLK(cmd)) {
5048 return nfs4_proc_getlk(state, F_GETLK, request);
5052 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5055 if (request->fl_type == F_UNLCK) {
5057 return nfs4_proc_unlck(state, cmd, request);
5064 * Don't rely on the VFS having checked the file open mode,
5065 * since it won't do this for flock() locks.
5067 switch (request->fl_type) {
5069 if (!(filp->f_mode & FMODE_READ))
5073 if (!(filp->f_mode & FMODE_WRITE))
5078 status = nfs4_proc_setlk(state, cmd, request);
5079 if ((status != -EAGAIN) || IS_SETLK(cmd))
5081 timeout = nfs4_set_lock_task_retry(timeout);
5082 status = -ERESTARTSYS;
5085 } while(status < 0);
5089 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
5091 struct nfs_server *server = NFS_SERVER(state->inode);
5092 struct nfs4_exception exception = { };
5095 err = nfs4_set_lock_state(state, fl);
5099 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5102 printk(KERN_ERR "NFS: %s: unhandled error "
5103 "%d.\n", __func__, err);
5107 case -NFS4ERR_EXPIRED:
5108 nfs4_schedule_stateid_recovery(server, state);
5109 case -NFS4ERR_STALE_CLIENTID:
5110 case -NFS4ERR_STALE_STATEID:
5111 nfs4_schedule_lease_recovery(server->nfs_client);
5113 case -NFS4ERR_BADSESSION:
5114 case -NFS4ERR_BADSLOT:
5115 case -NFS4ERR_BAD_HIGH_SLOT:
5116 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5117 case -NFS4ERR_DEADSESSION:
5118 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
5122 * The show must go on: exit, but mark the
5123 * stateid as needing recovery.
5125 case -NFS4ERR_DELEG_REVOKED:
5126 case -NFS4ERR_ADMIN_REVOKED:
5127 case -NFS4ERR_BAD_STATEID:
5128 case -NFS4ERR_OPENMODE:
5129 nfs4_schedule_stateid_recovery(server, state);
5134 * User RPCSEC_GSS context has expired.
5135 * We cannot recover this stateid now, so
5136 * skip it and allow recovery thread to
5142 case -NFS4ERR_DENIED:
5143 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5146 case -NFS4ERR_DELAY:
5149 err = nfs4_handle_exception(server, err, &exception);
5150 } while (exception.retry);
5155 struct nfs_release_lockowner_data {
5156 struct nfs4_lock_state *lsp;
5157 struct nfs_server *server;
5158 struct nfs_release_lockowner_args args;
5161 static void nfs4_release_lockowner_release(void *calldata)
5163 struct nfs_release_lockowner_data *data = calldata;
5164 nfs4_free_lock_state(data->server, data->lsp);
5168 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5169 .rpc_release = nfs4_release_lockowner_release,
5172 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
5174 struct nfs_server *server = lsp->ls_state->owner->so_server;
5175 struct nfs_release_lockowner_data *data;
5176 struct rpc_message msg = {
5177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5180 if (server->nfs_client->cl_mvops->minor_version != 0)
5182 data = kmalloc(sizeof(*data), GFP_NOFS);
5186 data->server = server;
5187 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5188 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5189 data->args.lock_owner.s_dev = server->s_dev;
5190 msg.rpc_argp = &data->args;
5191 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5195 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5197 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5198 const void *buf, size_t buflen,
5199 int flags, int type)
5201 if (strcmp(key, "") != 0)
5204 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5207 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5208 void *buf, size_t buflen, int type)
5210 if (strcmp(key, "") != 0)
5213 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5216 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5217 size_t list_len, const char *name,
5218 size_t name_len, int type)
5220 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5222 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5225 if (list && len <= list_len)
5226 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5231 * nfs_fhget will use either the mounted_on_fileid or the fileid
5233 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5235 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5236 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5237 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5238 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5241 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5242 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5243 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5247 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5248 const struct qstr *name,
5249 struct nfs4_fs_locations *fs_locations,
5252 struct nfs_server *server = NFS_SERVER(dir);
5254 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5256 struct nfs4_fs_locations_arg args = {
5257 .dir_fh = NFS_FH(dir),
5262 struct nfs4_fs_locations_res res = {
5263 .fs_locations = fs_locations,
5265 struct rpc_message msg = {
5266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5272 dprintk("%s: start\n", __func__);
5274 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5275 * is not supported */
5276 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5277 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5279 bitmask[0] |= FATTR4_WORD0_FILEID;
5281 nfs_fattr_init(&fs_locations->fattr);
5282 fs_locations->server = server;
5283 fs_locations->nlocations = 0;
5284 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5285 dprintk("%s: returned status = %d\n", __func__, status);
5289 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5290 const struct qstr *name,
5291 struct nfs4_fs_locations *fs_locations,
5294 struct nfs4_exception exception = { };
5297 err = nfs4_handle_exception(NFS_SERVER(dir),
5298 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5300 } while (exception.retry);
5304 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5307 struct nfs4_secinfo_arg args = {
5308 .dir_fh = NFS_FH(dir),
5311 struct nfs4_secinfo_res res = {
5314 struct rpc_message msg = {
5315 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5320 dprintk("NFS call secinfo %s\n", name->name);
5321 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5322 dprintk("NFS reply secinfo: %d\n", status);
5326 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5327 struct nfs4_secinfo_flavors *flavors)
5329 struct nfs4_exception exception = { };
5332 err = nfs4_handle_exception(NFS_SERVER(dir),
5333 _nfs4_proc_secinfo(dir, name, flavors),
5335 } while (exception.retry);
5339 #ifdef CONFIG_NFS_V4_1
5341 * Check the exchange flags returned by the server for invalid flags, having
5342 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5345 static int nfs4_check_cl_exchange_flags(u32 flags)
5347 if (flags & ~EXCHGID4_FLAG_MASK_R)
5349 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5350 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5352 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5356 return -NFS4ERR_INVAL;
5360 nfs41_same_server_scope(struct nfs41_server_scope *a,
5361 struct nfs41_server_scope *b)
5363 if (a->server_scope_sz == b->server_scope_sz &&
5364 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5371 * nfs4_proc_bind_conn_to_session()
5373 * The 4.1 client currently uses the same TCP connection for the
5374 * fore and backchannel.
5376 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5379 struct nfs41_bind_conn_to_session_res res;
5380 struct rpc_message msg = {
5382 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5388 dprintk("--> %s\n", __func__);
5390 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5391 if (unlikely(res.session == NULL)) {
5396 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5398 if (memcmp(res.session->sess_id.data,
5399 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5400 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5404 if (res.dir != NFS4_CDFS4_BOTH) {
5405 dprintk("NFS: %s: Unexpected direction from server\n",
5410 if (res.use_conn_in_rdma_mode) {
5411 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5420 dprintk("<-- %s status= %d\n", __func__, status);
5425 * nfs4_proc_exchange_id()
5427 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5429 * Since the clientid has expired, all compounds using sessions
5430 * associated with the stale clientid will be returning
5431 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5432 * be in some phase of session reset.
5434 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5436 nfs4_verifier verifier;
5437 struct nfs41_exchange_id_args args = {
5438 .verifier = &verifier,
5440 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5442 struct nfs41_exchange_id_res res = {
5446 struct rpc_message msg = {
5447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5453 nfs4_init_boot_verifier(clp, &verifier);
5454 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5456 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5457 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5458 args.id_len, args.id);
5460 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5462 if (unlikely(res.server_owner == NULL)) {
5467 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5469 if (unlikely(res.server_scope == NULL)) {
5471 goto out_server_owner;
5474 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5475 if (unlikely(res.impl_id == NULL)) {
5477 goto out_server_scope;
5480 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5482 status = nfs4_check_cl_exchange_flags(res.flags);
5485 clp->cl_clientid = res.clientid;
5486 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5487 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5488 clp->cl_seqid = res.seqid;
5490 kfree(clp->cl_serverowner);
5491 clp->cl_serverowner = res.server_owner;
5492 res.server_owner = NULL;
5494 /* use the most recent implementation id */
5495 kfree(clp->cl_implid);
5496 clp->cl_implid = res.impl_id;
5498 if (clp->cl_serverscope != NULL &&
5499 !nfs41_same_server_scope(clp->cl_serverscope,
5500 res.server_scope)) {
5501 dprintk("%s: server_scope mismatch detected\n",
5503 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5504 kfree(clp->cl_serverscope);
5505 clp->cl_serverscope = NULL;
5508 if (clp->cl_serverscope == NULL) {
5509 clp->cl_serverscope = res.server_scope;
5516 kfree(res.server_owner);
5518 kfree(res.server_scope);
5520 if (clp->cl_implid != NULL)
5521 dprintk("NFS reply exchange_id: Server Implementation ID: "
5522 "domain: %s, name: %s, date: %llu,%u\n",
5523 clp->cl_implid->domain, clp->cl_implid->name,
5524 clp->cl_implid->date.seconds,
5525 clp->cl_implid->date.nseconds);
5526 dprintk("NFS reply exchange_id: %d\n", status);
5530 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5531 struct rpc_cred *cred)
5533 struct rpc_message msg = {
5534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5540 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5542 dprintk("NFS: Got error %d from the server %s on "
5543 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5547 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5548 struct rpc_cred *cred)
5553 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5554 ret = _nfs4_proc_destroy_clientid(clp, cred);
5556 case -NFS4ERR_DELAY:
5557 case -NFS4ERR_CLIENTID_BUSY:
5567 int nfs4_destroy_clientid(struct nfs_client *clp)
5569 struct rpc_cred *cred;
5572 if (clp->cl_mvops->minor_version < 1)
5574 if (clp->cl_exchange_flags == 0)
5576 if (clp->cl_preserve_clid)
5578 cred = nfs4_get_exchange_id_cred(clp);
5579 ret = nfs4_proc_destroy_clientid(clp, cred);
5584 case -NFS4ERR_STALE_CLIENTID:
5585 clp->cl_exchange_flags = 0;
5591 struct nfs4_get_lease_time_data {
5592 struct nfs4_get_lease_time_args *args;
5593 struct nfs4_get_lease_time_res *res;
5594 struct nfs_client *clp;
5597 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5601 struct nfs4_get_lease_time_data *data =
5602 (struct nfs4_get_lease_time_data *)calldata;
5604 dprintk("--> %s\n", __func__);
5605 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5606 /* just setup sequence, do not trigger session recovery
5607 since we're invoked within one */
5608 ret = nfs41_setup_sequence(data->clp->cl_session,
5609 &data->args->la_seq_args,
5610 &data->res->lr_seq_res, task);
5613 rpc_call_start(task);
5614 dprintk("<-- %s\n", __func__);
5618 * Called from nfs4_state_manager thread for session setup, so don't recover
5619 * from sequence operation or clientid errors.
5621 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5623 struct nfs4_get_lease_time_data *data =
5624 (struct nfs4_get_lease_time_data *)calldata;
5626 dprintk("--> %s\n", __func__);
5627 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5629 switch (task->tk_status) {
5630 case -NFS4ERR_DELAY:
5631 case -NFS4ERR_GRACE:
5632 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5633 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5634 task->tk_status = 0;
5636 case -NFS4ERR_RETRY_UNCACHED_REP:
5637 rpc_restart_call_prepare(task);
5640 dprintk("<-- %s\n", __func__);
5643 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5644 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5645 .rpc_call_done = nfs4_get_lease_time_done,
5648 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5650 struct rpc_task *task;
5651 struct nfs4_get_lease_time_args args;
5652 struct nfs4_get_lease_time_res res = {
5653 .lr_fsinfo = fsinfo,
5655 struct nfs4_get_lease_time_data data = {
5660 struct rpc_message msg = {
5661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5665 struct rpc_task_setup task_setup = {
5666 .rpc_client = clp->cl_rpcclient,
5667 .rpc_message = &msg,
5668 .callback_ops = &nfs4_get_lease_time_ops,
5669 .callback_data = &data,
5670 .flags = RPC_TASK_TIMEOUT,
5674 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5675 dprintk("--> %s\n", __func__);
5676 task = rpc_run_task(&task_setup);
5679 status = PTR_ERR(task);
5681 status = task->tk_status;
5684 dprintk("<-- %s return %d\n", __func__, status);
5689 struct nfs4_slot *nfs4_alloc_slots(struct nfs4_slot_table *table,
5690 u32 max_slots, gfp_t gfp_flags)
5692 struct nfs4_slot *tbl;
5695 tbl = kmalloc_array(max_slots, sizeof(*tbl), gfp_flags);
5697 for (i = 0; i < max_slots; i++) {
5698 tbl[i].table = table;
5705 static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5706 struct nfs4_slot *new,
5710 struct nfs4_slot *old = NULL;
5713 spin_lock(&tbl->slot_tbl_lock);
5717 tbl->max_slots = max_slots;
5719 tbl->highest_used_slotid = NFS4_NO_SLOT;
5720 tbl->target_highest_slotid = max_slots - 1;
5721 for (i = 0; i < tbl->max_slots; i++)
5722 tbl->slots[i].seq_nr = ivalue;
5723 spin_unlock(&tbl->slot_tbl_lock);
5728 * (re)Initialise a slot table
5730 static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5733 struct nfs4_slot *new = NULL;
5736 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5737 max_reqs, tbl->max_slots);
5739 /* Does the newly negotiated max_reqs match the existing slot table? */
5740 if (max_reqs != tbl->max_slots) {
5741 new = nfs4_alloc_slots(tbl, max_reqs, GFP_NOFS);
5747 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
5748 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5749 tbl, tbl->slots, tbl->max_slots);
5751 dprintk("<-- %s: return %d\n", __func__, ret);
5755 /* Destroy the slot table */
5756 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5758 if (session->fc_slot_table.slots != NULL) {
5759 kfree(session->fc_slot_table.slots);
5760 session->fc_slot_table.slots = NULL;
5762 if (session->bc_slot_table.slots != NULL) {
5763 kfree(session->bc_slot_table.slots);
5764 session->bc_slot_table.slots = NULL;
5770 * Initialize or reset the forechannel and backchannel tables
5772 static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5774 struct nfs4_slot_table *tbl;
5777 dprintk("--> %s\n", __func__);
5779 tbl = &ses->fc_slot_table;
5781 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5782 if (status) /* -ENOMEM */
5785 tbl = &ses->bc_slot_table;
5787 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5788 if (status && tbl->slots == NULL)
5789 /* Fore and back channel share a connection so get
5790 * both slot tables or neither */
5791 nfs4_destroy_slot_tables(ses);
5795 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5797 struct nfs4_session *session;
5798 struct nfs4_slot_table *tbl;
5800 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5804 tbl = &session->fc_slot_table;
5805 tbl->highest_used_slotid = NFS4_NO_SLOT;
5806 spin_lock_init(&tbl->slot_tbl_lock);
5807 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5808 init_completion(&tbl->complete);
5810 tbl = &session->bc_slot_table;
5811 tbl->highest_used_slotid = NFS4_NO_SLOT;
5812 spin_lock_init(&tbl->slot_tbl_lock);
5813 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5814 init_completion(&tbl->complete);
5816 session->session_state = 1<<NFS4_SESSION_INITING;
5822 void nfs4_destroy_session(struct nfs4_session *session)
5824 struct rpc_xprt *xprt;
5825 struct rpc_cred *cred;
5827 cred = nfs4_get_exchange_id_cred(session->clp);
5828 nfs4_proc_destroy_session(session, cred);
5833 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5835 dprintk("%s Destroy backchannel for xprt %p\n",
5837 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5838 nfs4_destroy_slot_tables(session);
5843 * Initialize the values to be used by the client in CREATE_SESSION
5844 * If nfs4_init_session set the fore channel request and response sizes,
5847 * Set the back channel max_resp_sz_cached to zero to force the client to
5848 * always set csa_cachethis to FALSE because the current implementation
5849 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5851 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5853 struct nfs4_session *session = args->client->cl_session;
5854 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5855 mxresp_sz = session->fc_target_max_resp_sz;
5858 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5860 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5861 /* Fore channel attributes */
5862 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5863 args->fc_attrs.max_resp_sz = mxresp_sz;
5864 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5865 args->fc_attrs.max_reqs = max_session_slots;
5867 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5868 "max_ops=%u max_reqs=%u\n",
5870 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5871 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5873 /* Back channel attributes */
5874 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5875 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5876 args->bc_attrs.max_resp_sz_cached = 0;
5877 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5878 args->bc_attrs.max_reqs = 1;
5880 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5881 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5883 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5884 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5885 args->bc_attrs.max_reqs);
5888 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5890 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5891 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5893 if (rcvd->max_resp_sz > sent->max_resp_sz)
5896 * Our requested max_ops is the minimum we need; we're not
5897 * prepared to break up compounds into smaller pieces than that.
5898 * So, no point even trying to continue if the server won't
5901 if (rcvd->max_ops < sent->max_ops)
5903 if (rcvd->max_reqs == 0)
5905 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5906 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5910 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5912 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5913 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5915 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5917 if (rcvd->max_resp_sz < sent->max_resp_sz)
5919 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5921 /* These would render the backchannel useless: */
5922 if (rcvd->max_ops != sent->max_ops)
5924 if (rcvd->max_reqs != sent->max_reqs)
5929 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5930 struct nfs4_session *session)
5934 ret = nfs4_verify_fore_channel_attrs(args, session);
5937 return nfs4_verify_back_channel_attrs(args, session);
5940 static int _nfs4_proc_create_session(struct nfs_client *clp,
5941 struct rpc_cred *cred)
5943 struct nfs4_session *session = clp->cl_session;
5944 struct nfs41_create_session_args args = {
5946 .cb_program = NFS4_CALLBACK,
5948 struct nfs41_create_session_res res = {
5951 struct rpc_message msg = {
5952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5959 nfs4_init_channel_attrs(&args);
5960 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5962 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5965 /* Verify the session's negotiated channel_attrs values */
5966 status = nfs4_verify_channel_attrs(&args, session);
5967 /* Increment the clientid slot sequence id */
5975 * Issues a CREATE_SESSION operation to the server.
5976 * It is the responsibility of the caller to verify the session is
5977 * expired before calling this routine.
5979 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5983 struct nfs4_session *session = clp->cl_session;
5985 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5987 status = _nfs4_proc_create_session(clp, cred);
5991 /* Init or reset the session slot tables */
5992 status = nfs4_setup_session_slot_tables(session);
5993 dprintk("slot table setup returned %d\n", status);
5997 ptr = (unsigned *)&session->sess_id.data[0];
5998 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5999 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
6001 dprintk("<-- %s\n", __func__);
6006 * Issue the over-the-wire RPC DESTROY_SESSION.
6007 * The caller must serialize access to this routine.
6009 int nfs4_proc_destroy_session(struct nfs4_session *session,
6010 struct rpc_cred *cred)
6012 struct rpc_message msg = {
6013 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6014 .rpc_argp = session,
6019 dprintk("--> nfs4_proc_destroy_session\n");
6021 /* session is still being setup */
6022 if (session->clp->cl_cons_state != NFS_CS_READY)
6025 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6028 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
6029 "Session has been destroyed regardless...\n", status);
6031 dprintk("<-- nfs4_proc_destroy_session\n");
6036 * With sessions, the client is not marked ready until after a
6037 * successful EXCHANGE_ID and CREATE_SESSION.
6039 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
6040 * other versions of NFS can be tried.
6042 static int nfs41_check_session_ready(struct nfs_client *clp)
6046 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
6047 ret = nfs4_client_recover_expired_lease(clp);
6051 if (clp->cl_cons_state < NFS_CS_READY)
6052 return -EPROTONOSUPPORT;
6057 int nfs4_init_session(struct nfs_server *server)
6059 struct nfs_client *clp = server->nfs_client;
6060 struct nfs4_session *session;
6061 unsigned int target_max_rqst_sz = NFS_MAX_FILE_IO_SIZE;
6062 unsigned int target_max_resp_sz = NFS_MAX_FILE_IO_SIZE;
6064 if (!nfs4_has_session(clp))
6067 if (server->rsize != 0)
6068 target_max_resp_sz = server->rsize;
6069 target_max_resp_sz += nfs41_maxread_overhead;
6071 if (server->wsize != 0)
6072 target_max_rqst_sz = server->wsize;
6073 target_max_rqst_sz += nfs41_maxwrite_overhead;
6075 session = clp->cl_session;
6076 spin_lock(&clp->cl_lock);
6077 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
6078 /* Initialise targets and channel attributes */
6079 session->fc_target_max_rqst_sz = target_max_rqst_sz;
6080 session->fc_attrs.max_rqst_sz = target_max_rqst_sz;
6081 session->fc_target_max_resp_sz = target_max_resp_sz;
6082 session->fc_attrs.max_resp_sz = target_max_resp_sz;
6084 /* Just adjust the targets */
6085 if (target_max_rqst_sz > session->fc_target_max_rqst_sz) {
6086 session->fc_target_max_rqst_sz = target_max_rqst_sz;
6087 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
6089 if (target_max_resp_sz > session->fc_target_max_resp_sz) {
6090 session->fc_target_max_resp_sz = target_max_resp_sz;
6091 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
6094 spin_unlock(&clp->cl_lock);
6096 if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
6097 nfs4_schedule_lease_recovery(clp);
6099 return nfs41_check_session_ready(clp);
6102 int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
6104 struct nfs4_session *session = clp->cl_session;
6107 spin_lock(&clp->cl_lock);
6108 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
6110 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
6111 * DS lease to be equal to the MDS lease.
6113 clp->cl_lease_time = lease_time;
6114 clp->cl_last_renewal = jiffies;
6116 spin_unlock(&clp->cl_lock);
6118 ret = nfs41_check_session_ready(clp);
6121 /* Test for the DS role */
6122 if (!is_ds_client(clp))
6126 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
6130 * Renew the cl_session lease.
6132 struct nfs4_sequence_data {
6133 struct nfs_client *clp;
6134 struct nfs4_sequence_args args;
6135 struct nfs4_sequence_res res;
6138 static void nfs41_sequence_release(void *data)
6140 struct nfs4_sequence_data *calldata = data;
6141 struct nfs_client *clp = calldata->clp;
6143 if (atomic_read(&clp->cl_count) > 1)
6144 nfs4_schedule_state_renewal(clp);
6145 nfs_put_client(clp);
6149 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6151 switch(task->tk_status) {
6152 case -NFS4ERR_DELAY:
6153 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6156 nfs4_schedule_lease_recovery(clp);
6161 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
6163 struct nfs4_sequence_data *calldata = data;
6164 struct nfs_client *clp = calldata->clp;
6166 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6169 if (task->tk_status < 0) {
6170 dprintk("%s ERROR %d\n", __func__, task->tk_status);
6171 if (atomic_read(&clp->cl_count) == 1)
6174 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6175 rpc_restart_call_prepare(task);
6179 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
6181 dprintk("<-- %s\n", __func__);
6184 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6186 struct nfs4_sequence_data *calldata = data;
6187 struct nfs_client *clp = calldata->clp;
6188 struct nfs4_sequence_args *args;
6189 struct nfs4_sequence_res *res;
6191 args = task->tk_msg.rpc_argp;
6192 res = task->tk_msg.rpc_resp;
6194 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
6196 rpc_call_start(task);
6199 static void nfs41_sequence_prepare_privileged(struct rpc_task *task, void *data)
6201 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
6202 nfs41_sequence_prepare(task, data);
6205 static const struct rpc_call_ops nfs41_sequence_ops = {
6206 .rpc_call_done = nfs41_sequence_call_done,
6207 .rpc_call_prepare = nfs41_sequence_prepare,
6208 .rpc_release = nfs41_sequence_release,
6211 static const struct rpc_call_ops nfs41_sequence_privileged_ops = {
6212 .rpc_call_done = nfs41_sequence_call_done,
6213 .rpc_call_prepare = nfs41_sequence_prepare_privileged,
6214 .rpc_release = nfs41_sequence_release,
6217 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred,
6218 const struct rpc_call_ops *seq_ops)
6220 struct nfs4_sequence_data *calldata;
6221 struct rpc_message msg = {
6222 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6225 struct rpc_task_setup task_setup_data = {
6226 .rpc_client = clp->cl_rpcclient,
6227 .rpc_message = &msg,
6228 .callback_ops = seq_ops,
6229 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6232 if (!atomic_inc_not_zero(&clp->cl_count))
6233 return ERR_PTR(-EIO);
6234 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6235 if (calldata == NULL) {
6236 nfs_put_client(clp);
6237 return ERR_PTR(-ENOMEM);
6239 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
6240 msg.rpc_argp = &calldata->args;
6241 msg.rpc_resp = &calldata->res;
6242 calldata->clp = clp;
6243 task_setup_data.callback_data = calldata;
6245 return rpc_run_task(&task_setup_data);
6248 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
6250 struct rpc_task *task;
6253 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6255 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_ops);
6257 ret = PTR_ERR(task);
6259 rpc_put_task_async(task);
6260 dprintk("<-- %s status=%d\n", __func__, ret);
6264 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6266 struct rpc_task *task;
6269 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_privileged_ops);
6271 ret = PTR_ERR(task);
6274 ret = rpc_wait_for_completion_task(task);
6276 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6278 if (task->tk_status == 0)
6279 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
6280 ret = task->tk_status;
6284 dprintk("<-- %s status=%d\n", __func__, ret);
6288 struct nfs4_reclaim_complete_data {
6289 struct nfs_client *clp;
6290 struct nfs41_reclaim_complete_args arg;
6291 struct nfs41_reclaim_complete_res res;
6294 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6296 struct nfs4_reclaim_complete_data *calldata = data;
6298 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
6299 if (nfs41_setup_sequence(calldata->clp->cl_session,
6300 &calldata->arg.seq_args,
6301 &calldata->res.seq_res, task))
6304 rpc_call_start(task);
6307 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6309 switch(task->tk_status) {
6311 case -NFS4ERR_COMPLETE_ALREADY:
6312 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6314 case -NFS4ERR_DELAY:
6315 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6317 case -NFS4ERR_RETRY_UNCACHED_REP:
6320 nfs4_schedule_lease_recovery(clp);
6325 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6327 struct nfs4_reclaim_complete_data *calldata = data;
6328 struct nfs_client *clp = calldata->clp;
6329 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6331 dprintk("--> %s\n", __func__);
6332 if (!nfs41_sequence_done(task, res))
6335 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6336 rpc_restart_call_prepare(task);
6339 dprintk("<-- %s\n", __func__);
6342 static void nfs4_free_reclaim_complete_data(void *data)
6344 struct nfs4_reclaim_complete_data *calldata = data;
6349 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6350 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6351 .rpc_call_done = nfs4_reclaim_complete_done,
6352 .rpc_release = nfs4_free_reclaim_complete_data,
6356 * Issue a global reclaim complete.
6358 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6360 struct nfs4_reclaim_complete_data *calldata;
6361 struct rpc_task *task;
6362 struct rpc_message msg = {
6363 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6365 struct rpc_task_setup task_setup_data = {
6366 .rpc_client = clp->cl_rpcclient,
6367 .rpc_message = &msg,
6368 .callback_ops = &nfs4_reclaim_complete_call_ops,
6369 .flags = RPC_TASK_ASYNC,
6371 int status = -ENOMEM;
6373 dprintk("--> %s\n", __func__);
6374 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6375 if (calldata == NULL)
6377 calldata->clp = clp;
6378 calldata->arg.one_fs = 0;
6380 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6381 msg.rpc_argp = &calldata->arg;
6382 msg.rpc_resp = &calldata->res;
6383 task_setup_data.callback_data = calldata;
6384 task = rpc_run_task(&task_setup_data);
6386 status = PTR_ERR(task);
6389 status = nfs4_wait_for_completion_rpc_task(task);
6391 status = task->tk_status;
6395 dprintk("<-- %s status=%d\n", __func__, status);
6400 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6402 struct nfs4_layoutget *lgp = calldata;
6403 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6405 dprintk("--> %s\n", __func__);
6406 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6407 * right now covering the LAYOUTGET we are about to send.
6408 * However, that is not so catastrophic, and there seems
6409 * to be no way to prevent it completely.
6411 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
6412 &lgp->res.seq_res, task))
6414 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6415 NFS_I(lgp->args.inode)->layout,
6416 lgp->args.ctx->state)) {
6417 rpc_exit(task, NFS4_OK);
6420 rpc_call_start(task);
6423 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6425 struct nfs4_layoutget *lgp = calldata;
6426 struct inode *inode = lgp->args.inode;
6427 struct nfs_server *server = NFS_SERVER(inode);
6428 struct pnfs_layout_hdr *lo;
6429 struct nfs4_state *state = NULL;
6431 dprintk("--> %s\n", __func__);
6433 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6436 switch (task->tk_status) {
6439 case -NFS4ERR_LAYOUTTRYLATER:
6440 case -NFS4ERR_RECALLCONFLICT:
6441 task->tk_status = -NFS4ERR_DELAY;
6443 case -NFS4ERR_EXPIRED:
6444 case -NFS4ERR_BAD_STATEID:
6445 spin_lock(&inode->i_lock);
6446 lo = NFS_I(inode)->layout;
6447 if (!lo || list_empty(&lo->plh_segs)) {
6448 spin_unlock(&inode->i_lock);
6449 /* If the open stateid was bad, then recover it. */
6450 state = lgp->args.ctx->state;
6454 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6455 spin_unlock(&inode->i_lock);
6456 /* Mark the bad layout state as invalid, then
6457 * retry using the open stateid. */
6458 pnfs_free_lseg_list(&head);
6461 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6462 rpc_restart_call_prepare(task);
6464 dprintk("<-- %s\n", __func__);
6467 static size_t max_response_pages(struct nfs_server *server)
6469 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6470 return nfs_page_array_len(0, max_resp_sz);
6473 static void nfs4_free_pages(struct page **pages, size_t size)
6480 for (i = 0; i < size; i++) {
6483 __free_page(pages[i]);
6488 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6490 struct page **pages;
6493 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6495 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6499 for (i = 0; i < size; i++) {
6500 pages[i] = alloc_page(gfp_flags);
6502 dprintk("%s: failed to allocate page\n", __func__);
6503 nfs4_free_pages(pages, size);
6511 static void nfs4_layoutget_release(void *calldata)
6513 struct nfs4_layoutget *lgp = calldata;
6514 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6515 size_t max_pages = max_response_pages(server);
6517 dprintk("--> %s\n", __func__);
6518 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6519 put_nfs_open_context(lgp->args.ctx);
6521 dprintk("<-- %s\n", __func__);
6524 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6525 .rpc_call_prepare = nfs4_layoutget_prepare,
6526 .rpc_call_done = nfs4_layoutget_done,
6527 .rpc_release = nfs4_layoutget_release,
6530 struct pnfs_layout_segment *
6531 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6533 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6534 size_t max_pages = max_response_pages(server);
6535 struct rpc_task *task;
6536 struct rpc_message msg = {
6537 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6538 .rpc_argp = &lgp->args,
6539 .rpc_resp = &lgp->res,
6541 struct rpc_task_setup task_setup_data = {
6542 .rpc_client = server->client,
6543 .rpc_message = &msg,
6544 .callback_ops = &nfs4_layoutget_call_ops,
6545 .callback_data = lgp,
6546 .flags = RPC_TASK_ASYNC,
6548 struct pnfs_layout_segment *lseg = NULL;
6551 dprintk("--> %s\n", __func__);
6553 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6554 if (!lgp->args.layout.pages) {
6555 nfs4_layoutget_release(lgp);
6556 return ERR_PTR(-ENOMEM);
6558 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6560 lgp->res.layoutp = &lgp->args.layout;
6561 lgp->res.seq_res.sr_slot = NULL;
6562 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6563 task = rpc_run_task(&task_setup_data);
6565 return ERR_CAST(task);
6566 status = nfs4_wait_for_completion_rpc_task(task);
6568 status = task->tk_status;
6570 lseg = pnfs_layout_process(lgp);
6572 dprintk("<-- %s status=%d\n", __func__, status);
6574 return ERR_PTR(status);
6579 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6581 struct nfs4_layoutreturn *lrp = calldata;
6583 dprintk("--> %s\n", __func__);
6584 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
6585 &lrp->res.seq_res, task))
6587 rpc_call_start(task);
6590 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6592 struct nfs4_layoutreturn *lrp = calldata;
6593 struct nfs_server *server;
6595 dprintk("--> %s\n", __func__);
6597 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6600 server = NFS_SERVER(lrp->args.inode);
6601 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6602 rpc_restart_call_prepare(task);
6605 dprintk("<-- %s\n", __func__);
6608 static void nfs4_layoutreturn_release(void *calldata)
6610 struct nfs4_layoutreturn *lrp = calldata;
6611 struct pnfs_layout_hdr *lo = lrp->args.layout;
6613 dprintk("--> %s\n", __func__);
6614 spin_lock(&lo->plh_inode->i_lock);
6615 if (lrp->res.lrs_present)
6616 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6617 lo->plh_block_lgets--;
6618 spin_unlock(&lo->plh_inode->i_lock);
6619 pnfs_put_layout_hdr(lrp->args.layout);
6621 dprintk("<-- %s\n", __func__);
6624 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6625 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6626 .rpc_call_done = nfs4_layoutreturn_done,
6627 .rpc_release = nfs4_layoutreturn_release,
6630 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6632 struct rpc_task *task;
6633 struct rpc_message msg = {
6634 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6635 .rpc_argp = &lrp->args,
6636 .rpc_resp = &lrp->res,
6638 struct rpc_task_setup task_setup_data = {
6639 .rpc_client = lrp->clp->cl_rpcclient,
6640 .rpc_message = &msg,
6641 .callback_ops = &nfs4_layoutreturn_call_ops,
6642 .callback_data = lrp,
6646 dprintk("--> %s\n", __func__);
6647 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6648 task = rpc_run_task(&task_setup_data);
6650 return PTR_ERR(task);
6651 status = task->tk_status;
6652 dprintk("<-- %s status=%d\n", __func__, status);
6658 * Retrieve the list of Data Server devices from the MDS.
6660 static int _nfs4_getdevicelist(struct nfs_server *server,
6661 const struct nfs_fh *fh,
6662 struct pnfs_devicelist *devlist)
6664 struct nfs4_getdevicelist_args args = {
6666 .layoutclass = server->pnfs_curr_ld->id,
6668 struct nfs4_getdevicelist_res res = {
6671 struct rpc_message msg = {
6672 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6678 dprintk("--> %s\n", __func__);
6679 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6681 dprintk("<-- %s status=%d\n", __func__, status);
6685 int nfs4_proc_getdevicelist(struct nfs_server *server,
6686 const struct nfs_fh *fh,
6687 struct pnfs_devicelist *devlist)
6689 struct nfs4_exception exception = { };
6693 err = nfs4_handle_exception(server,
6694 _nfs4_getdevicelist(server, fh, devlist),
6696 } while (exception.retry);
6698 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6699 err, devlist->num_devs);
6703 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6706 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6708 struct nfs4_getdeviceinfo_args args = {
6711 struct nfs4_getdeviceinfo_res res = {
6714 struct rpc_message msg = {
6715 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6721 dprintk("--> %s\n", __func__);
6722 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6723 dprintk("<-- %s status=%d\n", __func__, status);
6728 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6730 struct nfs4_exception exception = { };
6734 err = nfs4_handle_exception(server,
6735 _nfs4_proc_getdeviceinfo(server, pdev),
6737 } while (exception.retry);
6740 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6742 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6744 struct nfs4_layoutcommit_data *data = calldata;
6745 struct nfs_server *server = NFS_SERVER(data->args.inode);
6747 if (nfs4_setup_sequence(server, &data->args.seq_args,
6748 &data->res.seq_res, task))
6750 rpc_call_start(task);
6754 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6756 struct nfs4_layoutcommit_data *data = calldata;
6757 struct nfs_server *server = NFS_SERVER(data->args.inode);
6759 if (!nfs4_sequence_done(task, &data->res.seq_res))
6762 switch (task->tk_status) { /* Just ignore these failures */
6763 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6764 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6765 case -NFS4ERR_BADLAYOUT: /* no layout */
6766 case -NFS4ERR_GRACE: /* loca_recalim always false */
6767 task->tk_status = 0;
6770 nfs_post_op_update_inode_force_wcc(data->args.inode,
6774 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6775 rpc_restart_call_prepare(task);
6781 static void nfs4_layoutcommit_release(void *calldata)
6783 struct nfs4_layoutcommit_data *data = calldata;
6784 struct pnfs_layout_segment *lseg, *tmp;
6785 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6787 pnfs_cleanup_layoutcommit(data);
6788 /* Matched by references in pnfs_set_layoutcommit */
6789 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6790 list_del_init(&lseg->pls_lc_list);
6791 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6793 pnfs_put_lseg(lseg);
6796 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6797 smp_mb__after_clear_bit();
6798 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6800 put_rpccred(data->cred);
6804 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6805 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6806 .rpc_call_done = nfs4_layoutcommit_done,
6807 .rpc_release = nfs4_layoutcommit_release,
6811 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6813 struct rpc_message msg = {
6814 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6815 .rpc_argp = &data->args,
6816 .rpc_resp = &data->res,
6817 .rpc_cred = data->cred,
6819 struct rpc_task_setup task_setup_data = {
6820 .task = &data->task,
6821 .rpc_client = NFS_CLIENT(data->args.inode),
6822 .rpc_message = &msg,
6823 .callback_ops = &nfs4_layoutcommit_ops,
6824 .callback_data = data,
6825 .flags = RPC_TASK_ASYNC,
6827 struct rpc_task *task;
6830 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6831 "lbw: %llu inode %lu\n",
6832 data->task.tk_pid, sync,
6833 data->args.lastbytewritten,
6834 data->args.inode->i_ino);
6836 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6837 task = rpc_run_task(&task_setup_data);
6839 return PTR_ERR(task);
6842 status = nfs4_wait_for_completion_rpc_task(task);
6845 status = task->tk_status;
6847 dprintk("%s: status %d\n", __func__, status);
6853 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6854 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6856 struct nfs41_secinfo_no_name_args args = {
6857 .style = SECINFO_STYLE_CURRENT_FH,
6859 struct nfs4_secinfo_res res = {
6862 struct rpc_message msg = {
6863 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6867 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6871 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6872 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6874 struct nfs4_exception exception = { };
6877 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6880 case -NFS4ERR_WRONGSEC:
6881 case -NFS4ERR_NOTSUPP:
6884 err = nfs4_handle_exception(server, err, &exception);
6886 } while (exception.retry);
6892 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6893 struct nfs_fsinfo *info)
6897 rpc_authflavor_t flavor;
6898 struct nfs4_secinfo_flavors *flavors;
6900 page = alloc_page(GFP_KERNEL);
6906 flavors = page_address(page);
6907 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6910 * Fall back on "guess and check" method if
6911 * the server doesn't support SECINFO_NO_NAME
6913 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6914 err = nfs4_find_root_sec(server, fhandle, info);
6920 flavor = nfs_find_best_sec(flavors);
6922 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6932 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6935 struct nfs41_test_stateid_args args = {
6938 struct nfs41_test_stateid_res res;
6939 struct rpc_message msg = {
6940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6945 dprintk("NFS call test_stateid %p\n", stateid);
6946 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6947 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6948 if (status != NFS_OK) {
6949 dprintk("NFS reply test_stateid: failed, %d\n", status);
6952 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
6957 * nfs41_test_stateid - perform a TEST_STATEID operation
6959 * @server: server / transport on which to perform the operation
6960 * @stateid: state ID to test
6962 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6963 * Otherwise a negative NFS4ERR value is returned if the operation
6964 * failed or the state ID is not currently valid.
6966 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6968 struct nfs4_exception exception = { };
6971 err = _nfs41_test_stateid(server, stateid);
6972 if (err != -NFS4ERR_DELAY)
6974 nfs4_handle_exception(server, err, &exception);
6975 } while (exception.retry);
6979 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6981 struct nfs41_free_stateid_args args = {
6984 struct nfs41_free_stateid_res res;
6985 struct rpc_message msg = {
6986 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6992 dprintk("NFS call free_stateid %p\n", stateid);
6993 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6994 status = nfs4_call_sync_sequence(server->client, server, &msg,
6995 &args.seq_args, &res.seq_res, 1);
6996 dprintk("NFS reply free_stateid: %d\n", status);
7001 * nfs41_free_stateid - perform a FREE_STATEID operation
7003 * @server: server / transport on which to perform the operation
7004 * @stateid: state ID to release
7006 * Returns NFS_OK if the server freed "stateid". Otherwise a
7007 * negative NFS4ERR value is returned.
7009 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7011 struct nfs4_exception exception = { };
7014 err = _nfs4_free_stateid(server, stateid);
7015 if (err != -NFS4ERR_DELAY)
7017 nfs4_handle_exception(server, err, &exception);
7018 } while (exception.retry);
7022 static bool nfs41_match_stateid(const nfs4_stateid *s1,
7023 const nfs4_stateid *s2)
7025 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
7028 if (s1->seqid == s2->seqid)
7030 if (s1->seqid == 0 || s2->seqid == 0)
7036 #endif /* CONFIG_NFS_V4_1 */
7038 static bool nfs4_match_stateid(const nfs4_stateid *s1,
7039 const nfs4_stateid *s2)
7041 return nfs4_stateid_match(s1, s2);
7045 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7046 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7047 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7048 .recover_open = nfs4_open_reclaim,
7049 .recover_lock = nfs4_lock_reclaim,
7050 .establish_clid = nfs4_init_clientid,
7051 .get_clid_cred = nfs4_get_setclientid_cred,
7052 .detect_trunking = nfs40_discover_server_trunking,
7055 #if defined(CONFIG_NFS_V4_1)
7056 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
7057 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7058 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7059 .recover_open = nfs4_open_reclaim,
7060 .recover_lock = nfs4_lock_reclaim,
7061 .establish_clid = nfs41_init_clientid,
7062 .get_clid_cred = nfs4_get_exchange_id_cred,
7063 .reclaim_complete = nfs41_proc_reclaim_complete,
7064 .detect_trunking = nfs41_discover_server_trunking,
7066 #endif /* CONFIG_NFS_V4_1 */
7068 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
7069 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7070 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7071 .recover_open = nfs4_open_expired,
7072 .recover_lock = nfs4_lock_expired,
7073 .establish_clid = nfs4_init_clientid,
7074 .get_clid_cred = nfs4_get_setclientid_cred,
7077 #if defined(CONFIG_NFS_V4_1)
7078 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7079 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7080 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7081 .recover_open = nfs41_open_expired,
7082 .recover_lock = nfs41_lock_expired,
7083 .establish_clid = nfs41_init_clientid,
7084 .get_clid_cred = nfs4_get_exchange_id_cred,
7086 #endif /* CONFIG_NFS_V4_1 */
7088 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
7089 .sched_state_renewal = nfs4_proc_async_renew,
7090 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
7091 .renew_lease = nfs4_proc_renew,
7094 #if defined(CONFIG_NFS_V4_1)
7095 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
7096 .sched_state_renewal = nfs41_proc_async_sequence,
7097 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
7098 .renew_lease = nfs4_proc_sequence,
7102 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7104 .call_sync = _nfs4_call_sync,
7105 .match_stateid = nfs4_match_stateid,
7106 .find_root_sec = nfs4_find_root_sec,
7107 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7108 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7109 .state_renewal_ops = &nfs40_state_renewal_ops,
7112 #if defined(CONFIG_NFS_V4_1)
7113 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7115 .call_sync = _nfs4_call_sync_session,
7116 .match_stateid = nfs41_match_stateid,
7117 .find_root_sec = nfs41_find_root_sec,
7118 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7119 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7120 .state_renewal_ops = &nfs41_state_renewal_ops,
7124 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7125 [0] = &nfs_v4_0_minor_ops,
7126 #if defined(CONFIG_NFS_V4_1)
7127 [1] = &nfs_v4_1_minor_ops,
7131 const struct inode_operations nfs4_dir_inode_operations = {
7132 .create = nfs_create,
7133 .lookup = nfs_lookup,
7134 .atomic_open = nfs_atomic_open,
7136 .unlink = nfs_unlink,
7137 .symlink = nfs_symlink,
7141 .rename = nfs_rename,
7142 .permission = nfs_permission,
7143 .getattr = nfs_getattr,
7144 .setattr = nfs_setattr,
7145 .getxattr = generic_getxattr,
7146 .setxattr = generic_setxattr,
7147 .listxattr = generic_listxattr,
7148 .removexattr = generic_removexattr,
7151 static const struct inode_operations nfs4_file_inode_operations = {
7152 .permission = nfs_permission,
7153 .getattr = nfs_getattr,
7154 .setattr = nfs_setattr,
7155 .getxattr = generic_getxattr,
7156 .setxattr = generic_setxattr,
7157 .listxattr = generic_listxattr,
7158 .removexattr = generic_removexattr,
7161 const struct nfs_rpc_ops nfs_v4_clientops = {
7162 .version = 4, /* protocol version */
7163 .dentry_ops = &nfs4_dentry_operations,
7164 .dir_inode_ops = &nfs4_dir_inode_operations,
7165 .file_inode_ops = &nfs4_file_inode_operations,
7166 .file_ops = &nfs4_file_operations,
7167 .getroot = nfs4_proc_get_root,
7168 .submount = nfs4_submount,
7169 .try_mount = nfs4_try_mount,
7170 .getattr = nfs4_proc_getattr,
7171 .setattr = nfs4_proc_setattr,
7172 .lookup = nfs4_proc_lookup,
7173 .access = nfs4_proc_access,
7174 .readlink = nfs4_proc_readlink,
7175 .create = nfs4_proc_create,
7176 .remove = nfs4_proc_remove,
7177 .unlink_setup = nfs4_proc_unlink_setup,
7178 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
7179 .unlink_done = nfs4_proc_unlink_done,
7180 .rename = nfs4_proc_rename,
7181 .rename_setup = nfs4_proc_rename_setup,
7182 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
7183 .rename_done = nfs4_proc_rename_done,
7184 .link = nfs4_proc_link,
7185 .symlink = nfs4_proc_symlink,
7186 .mkdir = nfs4_proc_mkdir,
7187 .rmdir = nfs4_proc_remove,
7188 .readdir = nfs4_proc_readdir,
7189 .mknod = nfs4_proc_mknod,
7190 .statfs = nfs4_proc_statfs,
7191 .fsinfo = nfs4_proc_fsinfo,
7192 .pathconf = nfs4_proc_pathconf,
7193 .set_capabilities = nfs4_server_capabilities,
7194 .decode_dirent = nfs4_decode_dirent,
7195 .read_setup = nfs4_proc_read_setup,
7196 .read_pageio_init = pnfs_pageio_init_read,
7197 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
7198 .read_done = nfs4_read_done,
7199 .write_setup = nfs4_proc_write_setup,
7200 .write_pageio_init = pnfs_pageio_init_write,
7201 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
7202 .write_done = nfs4_write_done,
7203 .commit_setup = nfs4_proc_commit_setup,
7204 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
7205 .commit_done = nfs4_commit_done,
7206 .lock = nfs4_proc_lock,
7207 .clear_acl_cache = nfs4_zap_acl_attr,
7208 .close_context = nfs4_close_context,
7209 .open_context = nfs4_atomic_open,
7210 .have_delegation = nfs4_have_delegation,
7211 .return_delegation = nfs4_inode_return_delegation,
7212 .alloc_client = nfs4_alloc_client,
7213 .init_client = nfs4_init_client,
7214 .free_client = nfs4_free_client,
7215 .create_server = nfs4_create_server,
7216 .clone_server = nfs_clone_server,
7219 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7220 .prefix = XATTR_NAME_NFSV4_ACL,
7221 .list = nfs4_xattr_list_nfs4_acl,
7222 .get = nfs4_xattr_get_nfs4_acl,
7223 .set = nfs4_xattr_set_nfs4_acl,
7226 const struct xattr_handler *nfs4_xattr_handlers[] = {
7227 &nfs4_xattr_nfs4_acl_handler,