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, u32 slotid)
417 /* clear used bit in bitmap */
418 __clear_bit(slotid, tbl->used_slots);
420 /* update highest_used_slotid when it is freed */
421 if (slotid == tbl->highest_used_slotid) {
422 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
423 if (slotid < tbl->max_slots)
424 tbl->highest_used_slotid = slotid;
426 tbl->highest_used_slotid = NFS4_NO_SLOT;
428 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
429 slotid, tbl->highest_used_slotid);
432 bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
434 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
439 * Signal state manager thread if session fore channel is drained
441 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
443 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
444 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
445 nfs4_set_task_privileged, NULL);
449 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
452 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
453 complete(&ses->fc_slot_table.complete);
457 * Signal state manager thread if session back channel is drained
459 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
461 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
462 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
464 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
465 complete(&ses->bc_slot_table.complete);
468 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
470 struct nfs4_session *session;
471 struct nfs4_slot_table *tbl;
474 /* just wake up the next guy waiting since
475 * we may have not consumed a slot after all */
476 dprintk("%s: No slot\n", __func__);
479 tbl = res->sr_slot->table;
480 session = tbl->session;
482 spin_lock(&tbl->slot_tbl_lock);
483 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
484 nfs4_check_drain_fc_complete(session);
485 spin_unlock(&tbl->slot_tbl_lock);
489 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
491 struct nfs4_session *session;
492 struct nfs4_slot *slot;
493 unsigned long timestamp;
494 struct nfs_client *clp;
497 * sr_status remains 1 if an RPC level error occurred. The server
498 * may or may not have processed the sequence operation..
499 * Proceed as if the server received and processed the sequence
502 if (res->sr_status == 1)
503 res->sr_status = NFS_OK;
505 /* don't increment the sequence number if the task wasn't sent */
506 if (!RPC_WAS_SENT(task))
510 session = slot->table->session;
512 /* Check the SEQUENCE operation status */
513 switch (res->sr_status) {
515 /* Update the slot's sequence and clientid lease timer */
517 timestamp = slot->renewal_time;
519 do_renew_lease(clp, timestamp);
520 /* Check sequence flags */
521 if (res->sr_status_flags != 0)
522 nfs4_schedule_lease_recovery(clp);
525 /* The server detected a resend of the RPC call and
526 * returned NFS4ERR_DELAY as per Section 2.10.6.2
529 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
531 slot - session->fc_slot_table.slots,
535 /* Just update the slot sequence no. */
539 /* The session may be reset by one of the error handlers. */
540 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
541 nfs41_sequence_free_slot(res);
544 if (!rpc_restart_call(task))
546 rpc_delay(task, NFS4_POLL_RETRY_MAX);
550 static int nfs4_sequence_done(struct rpc_task *task,
551 struct nfs4_sequence_res *res)
553 if (res->sr_slot == NULL)
555 return nfs41_sequence_done(task, res);
559 * nfs4_find_slot - efficiently look for a free slot
561 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
562 * If found, we mark the slot as used, update the highest_used_slotid,
563 * and respectively set up the sequence operation args.
564 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
566 * Note: must be called with under the slot_tbl_lock.
569 nfs4_find_slot(struct nfs4_slot_table *tbl)
572 u32 ret_id = NFS4_NO_SLOT;
574 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
575 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
577 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
578 if (slotid >= tbl->max_slots)
580 __set_bit(slotid, tbl->used_slots);
581 if (slotid > tbl->highest_used_slotid ||
582 tbl->highest_used_slotid == NFS4_NO_SLOT)
583 tbl->highest_used_slotid = slotid;
586 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
587 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
591 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
592 struct nfs4_sequence_res *res, int cache_reply)
594 args->sa_session = NULL;
595 args->sa_cache_this = 0;
597 args->sa_cache_this = 1;
601 int nfs41_setup_sequence(struct nfs4_session *session,
602 struct nfs4_sequence_args *args,
603 struct nfs4_sequence_res *res,
604 struct rpc_task *task)
606 struct nfs4_slot *slot;
607 struct nfs4_slot_table *tbl;
610 dprintk("--> %s\n", __func__);
611 /* slot already allocated? */
612 if (res->sr_slot != NULL)
615 tbl = &session->fc_slot_table;
617 spin_lock(&tbl->slot_tbl_lock);
618 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
619 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
620 /* The state manager will wait until the slot table is empty */
621 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
622 spin_unlock(&tbl->slot_tbl_lock);
623 dprintk("%s session is draining\n", __func__);
627 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
628 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
629 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
630 spin_unlock(&tbl->slot_tbl_lock);
631 dprintk("%s enforce FIFO order\n", __func__);
635 slotid = nfs4_find_slot(tbl);
636 if (slotid == NFS4_NO_SLOT) {
637 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
638 spin_unlock(&tbl->slot_tbl_lock);
639 dprintk("<-- %s: no free slots\n", __func__);
642 spin_unlock(&tbl->slot_tbl_lock);
644 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
645 slot = tbl->slots + slotid;
646 slot->renewal_time = jiffies;
647 args->sa_session = session;
648 args->sa_slotid = slotid;
650 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
653 res->sr_status_flags = 0;
655 * sr_status is only set in decode_sequence, and so will remain
656 * set to 1 if an rpc level failure occurs.
661 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
663 int nfs4_setup_sequence(const struct nfs_server *server,
664 struct nfs4_sequence_args *args,
665 struct nfs4_sequence_res *res,
666 struct rpc_task *task)
668 struct nfs4_session *session = nfs4_get_session(server);
674 dprintk("--> %s clp %p session %p sr_slot %td\n",
675 __func__, session->clp, session, res->sr_slot ?
676 res->sr_slot - session->fc_slot_table.slots : -1);
678 ret = nfs41_setup_sequence(session, args, res, task);
680 dprintk("<-- %s status=%d\n", __func__, ret);
684 struct nfs41_call_sync_data {
685 const struct nfs_server *seq_server;
686 struct nfs4_sequence_args *seq_args;
687 struct nfs4_sequence_res *seq_res;
690 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
692 struct nfs41_call_sync_data *data = calldata;
694 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
696 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
697 data->seq_res, task))
699 rpc_call_start(task);
702 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
704 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
705 nfs41_call_sync_prepare(task, calldata);
708 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
710 struct nfs41_call_sync_data *data = calldata;
712 nfs41_sequence_done(task, data->seq_res);
715 static const struct rpc_call_ops nfs41_call_sync_ops = {
716 .rpc_call_prepare = nfs41_call_sync_prepare,
717 .rpc_call_done = nfs41_call_sync_done,
720 static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
721 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
722 .rpc_call_done = nfs41_call_sync_done,
725 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
726 struct nfs_server *server,
727 struct rpc_message *msg,
728 struct nfs4_sequence_args *args,
729 struct nfs4_sequence_res *res,
733 struct rpc_task *task;
734 struct nfs41_call_sync_data data = {
735 .seq_server = server,
739 struct rpc_task_setup task_setup = {
742 .callback_ops = &nfs41_call_sync_ops,
743 .callback_data = &data
747 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
748 task = rpc_run_task(&task_setup);
752 ret = task->tk_status;
758 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
759 struct nfs_server *server,
760 struct rpc_message *msg,
761 struct nfs4_sequence_args *args,
762 struct nfs4_sequence_res *res,
765 nfs41_init_sequence(args, res, cache_reply);
766 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
771 void nfs41_init_sequence(struct nfs4_sequence_args *args,
772 struct nfs4_sequence_res *res, int cache_reply)
776 static int nfs4_sequence_done(struct rpc_task *task,
777 struct nfs4_sequence_res *res)
781 #endif /* CONFIG_NFS_V4_1 */
783 int _nfs4_call_sync(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 rpc_call_sync(clnt, msg, 0);
795 int nfs4_call_sync(struct rpc_clnt *clnt,
796 struct nfs_server *server,
797 struct rpc_message *msg,
798 struct nfs4_sequence_args *args,
799 struct nfs4_sequence_res *res,
802 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
803 args, res, cache_reply);
806 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
808 struct nfs_inode *nfsi = NFS_I(dir);
810 spin_lock(&dir->i_lock);
811 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
812 if (!cinfo->atomic || cinfo->before != dir->i_version)
813 nfs_force_lookup_revalidate(dir);
814 dir->i_version = cinfo->after;
815 spin_unlock(&dir->i_lock);
818 struct nfs4_opendata {
820 struct nfs_openargs o_arg;
821 struct nfs_openres o_res;
822 struct nfs_open_confirmargs c_arg;
823 struct nfs_open_confirmres c_res;
824 struct nfs4_string owner_name;
825 struct nfs4_string group_name;
826 struct nfs_fattr f_attr;
828 struct dentry *dentry;
829 struct nfs4_state_owner *owner;
830 struct nfs4_state *state;
832 unsigned long timestamp;
833 unsigned int rpc_done : 1;
839 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
841 p->o_res.f_attr = &p->f_attr;
842 p->o_res.seqid = p->o_arg.seqid;
843 p->c_res.seqid = p->c_arg.seqid;
844 p->o_res.server = p->o_arg.server;
845 p->o_res.access_request = p->o_arg.access;
846 nfs_fattr_init(&p->f_attr);
847 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
850 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
851 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
852 const struct iattr *attrs,
855 struct dentry *parent = dget_parent(dentry);
856 struct inode *dir = parent->d_inode;
857 struct nfs_server *server = NFS_SERVER(dir);
858 struct nfs4_opendata *p;
860 p = kzalloc(sizeof(*p), gfp_mask);
863 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
864 if (p->o_arg.seqid == NULL)
866 nfs_sb_active(dentry->d_sb);
867 p->dentry = dget(dentry);
870 atomic_inc(&sp->so_count);
871 p->o_arg.fh = NFS_FH(dir);
872 p->o_arg.open_flags = flags;
873 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
874 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
875 * will return permission denied for all bits until close */
876 if (!(flags & O_EXCL)) {
877 /* ask server to check for all possible rights as results
879 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
880 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
882 p->o_arg.clientid = server->nfs_client->cl_clientid;
883 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
884 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
885 p->o_arg.name = &dentry->d_name;
886 p->o_arg.server = server;
887 p->o_arg.bitmask = server->attr_bitmask;
888 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
889 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
890 if (attrs != NULL && attrs->ia_valid != 0) {
893 p->o_arg.u.attrs = &p->attrs;
894 memcpy(&p->attrs, attrs, sizeof(p->attrs));
897 verf[1] = current->pid;
898 memcpy(p->o_arg.u.verifier.data, verf,
899 sizeof(p->o_arg.u.verifier.data));
901 p->c_arg.fh = &p->o_res.fh;
902 p->c_arg.stateid = &p->o_res.stateid;
903 p->c_arg.seqid = p->o_arg.seqid;
904 nfs4_init_opendata_res(p);
914 static void nfs4_opendata_free(struct kref *kref)
916 struct nfs4_opendata *p = container_of(kref,
917 struct nfs4_opendata, kref);
918 struct super_block *sb = p->dentry->d_sb;
920 nfs_free_seqid(p->o_arg.seqid);
921 if (p->state != NULL)
922 nfs4_put_open_state(p->state);
923 nfs4_put_state_owner(p->owner);
927 nfs_fattr_free_names(&p->f_attr);
931 static void nfs4_opendata_put(struct nfs4_opendata *p)
934 kref_put(&p->kref, nfs4_opendata_free);
937 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
941 ret = rpc_wait_for_completion_task(task);
945 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
949 if (open_mode & (O_EXCL|O_TRUNC))
951 switch (mode & (FMODE_READ|FMODE_WRITE)) {
953 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
954 && state->n_rdonly != 0;
957 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
958 && state->n_wronly != 0;
960 case FMODE_READ|FMODE_WRITE:
961 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
962 && state->n_rdwr != 0;
968 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
970 if (delegation == NULL)
972 if ((delegation->type & fmode) != fmode)
974 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
976 nfs_mark_delegation_referenced(delegation);
980 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
989 case FMODE_READ|FMODE_WRITE:
992 nfs4_state_set_mode_locked(state, state->state | fmode);
995 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
997 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
998 nfs4_stateid_copy(&state->stateid, stateid);
999 nfs4_stateid_copy(&state->open_stateid, stateid);
1002 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1005 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1007 case FMODE_READ|FMODE_WRITE:
1008 set_bit(NFS_O_RDWR_STATE, &state->flags);
1012 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1014 write_seqlock(&state->seqlock);
1015 nfs_set_open_stateid_locked(state, stateid, fmode);
1016 write_sequnlock(&state->seqlock);
1019 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1022 * Protect the call to nfs4_state_set_mode_locked and
1023 * serialise the stateid update
1025 write_seqlock(&state->seqlock);
1026 if (deleg_stateid != NULL) {
1027 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1028 set_bit(NFS_DELEGATED_STATE, &state->flags);
1030 if (open_stateid != NULL)
1031 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1032 write_sequnlock(&state->seqlock);
1033 spin_lock(&state->owner->so_lock);
1034 update_open_stateflags(state, fmode);
1035 spin_unlock(&state->owner->so_lock);
1038 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1040 struct nfs_inode *nfsi = NFS_I(state->inode);
1041 struct nfs_delegation *deleg_cur;
1044 fmode &= (FMODE_READ|FMODE_WRITE);
1047 deleg_cur = rcu_dereference(nfsi->delegation);
1048 if (deleg_cur == NULL)
1051 spin_lock(&deleg_cur->lock);
1052 if (nfsi->delegation != deleg_cur ||
1053 (deleg_cur->type & fmode) != fmode)
1054 goto no_delegation_unlock;
1056 if (delegation == NULL)
1057 delegation = &deleg_cur->stateid;
1058 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1059 goto no_delegation_unlock;
1061 nfs_mark_delegation_referenced(deleg_cur);
1062 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1064 no_delegation_unlock:
1065 spin_unlock(&deleg_cur->lock);
1069 if (!ret && open_stateid != NULL) {
1070 __update_open_stateid(state, open_stateid, NULL, fmode);
1078 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1080 struct nfs_delegation *delegation;
1083 delegation = rcu_dereference(NFS_I(inode)->delegation);
1084 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1089 nfs4_inode_return_delegation(inode);
1092 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1094 struct nfs4_state *state = opendata->state;
1095 struct nfs_inode *nfsi = NFS_I(state->inode);
1096 struct nfs_delegation *delegation;
1097 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1098 fmode_t fmode = opendata->o_arg.fmode;
1099 nfs4_stateid stateid;
1103 if (can_open_cached(state, fmode, open_mode)) {
1104 spin_lock(&state->owner->so_lock);
1105 if (can_open_cached(state, fmode, open_mode)) {
1106 update_open_stateflags(state, fmode);
1107 spin_unlock(&state->owner->so_lock);
1108 goto out_return_state;
1110 spin_unlock(&state->owner->so_lock);
1113 delegation = rcu_dereference(nfsi->delegation);
1114 if (!can_open_delegated(delegation, fmode)) {
1118 /* Save the delegation */
1119 nfs4_stateid_copy(&stateid, &delegation->stateid);
1121 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1126 /* Try to update the stateid using the delegation */
1127 if (update_open_stateid(state, NULL, &stateid, fmode))
1128 goto out_return_state;
1131 return ERR_PTR(ret);
1133 atomic_inc(&state->count);
1138 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1140 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1141 struct nfs_delegation *delegation;
1142 int delegation_flags = 0;
1145 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1147 delegation_flags = delegation->flags;
1149 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1150 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1151 "returning a delegation for "
1152 "OPEN(CLAIM_DELEGATE_CUR)\n",
1154 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1155 nfs_inode_set_delegation(state->inode,
1156 data->owner->so_cred,
1159 nfs_inode_reclaim_delegation(state->inode,
1160 data->owner->so_cred,
1165 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1166 * and update the nfs4_state.
1168 static struct nfs4_state *
1169 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1171 struct inode *inode = data->state->inode;
1172 struct nfs4_state *state = data->state;
1175 if (!data->rpc_done) {
1176 ret = data->rpc_status;
1181 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1182 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1183 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1187 state = nfs4_get_open_state(inode, data->owner);
1191 ret = nfs_refresh_inode(inode, &data->f_attr);
1195 if (data->o_res.delegation_type != 0)
1196 nfs4_opendata_check_deleg(data, state);
1197 update_open_stateid(state, &data->o_res.stateid, NULL,
1202 return ERR_PTR(ret);
1206 static struct nfs4_state *
1207 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1209 struct inode *inode;
1210 struct nfs4_state *state = NULL;
1213 if (!data->rpc_done) {
1214 state = nfs4_try_open_cached(data);
1219 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1221 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1222 ret = PTR_ERR(inode);
1226 state = nfs4_get_open_state(inode, data->owner);
1229 if (data->o_res.delegation_type != 0)
1230 nfs4_opendata_check_deleg(data, state);
1231 update_open_stateid(state, &data->o_res.stateid, NULL,
1239 return ERR_PTR(ret);
1242 static struct nfs4_state *
1243 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1245 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1246 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1247 return _nfs4_opendata_to_nfs4_state(data);
1250 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1252 struct nfs_inode *nfsi = NFS_I(state->inode);
1253 struct nfs_open_context *ctx;
1255 spin_lock(&state->inode->i_lock);
1256 list_for_each_entry(ctx, &nfsi->open_files, list) {
1257 if (ctx->state != state)
1259 get_nfs_open_context(ctx);
1260 spin_unlock(&state->inode->i_lock);
1263 spin_unlock(&state->inode->i_lock);
1264 return ERR_PTR(-ENOENT);
1267 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1269 struct nfs4_opendata *opendata;
1271 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1272 if (opendata == NULL)
1273 return ERR_PTR(-ENOMEM);
1274 opendata->state = state;
1275 atomic_inc(&state->count);
1279 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1281 struct nfs4_state *newstate;
1284 opendata->o_arg.open_flags = 0;
1285 opendata->o_arg.fmode = fmode;
1286 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1287 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1288 nfs4_init_opendata_res(opendata);
1289 ret = _nfs4_recover_proc_open(opendata);
1292 newstate = nfs4_opendata_to_nfs4_state(opendata);
1293 if (IS_ERR(newstate))
1294 return PTR_ERR(newstate);
1295 nfs4_close_state(newstate, fmode);
1300 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1302 struct nfs4_state *newstate;
1305 /* memory barrier prior to reading state->n_* */
1306 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1308 if (state->n_rdwr != 0) {
1309 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1310 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1313 if (newstate != state)
1316 if (state->n_wronly != 0) {
1317 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1318 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1321 if (newstate != state)
1324 if (state->n_rdonly != 0) {
1325 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1326 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1329 if (newstate != state)
1333 * We may have performed cached opens for all three recoveries.
1334 * Check if we need to update the current stateid.
1336 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1337 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1338 write_seqlock(&state->seqlock);
1339 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1340 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1341 write_sequnlock(&state->seqlock);
1348 * reclaim state on the server after a reboot.
1350 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1352 struct nfs_delegation *delegation;
1353 struct nfs4_opendata *opendata;
1354 fmode_t delegation_type = 0;
1357 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1358 if (IS_ERR(opendata))
1359 return PTR_ERR(opendata);
1360 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1361 opendata->o_arg.fh = NFS_FH(state->inode);
1363 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1364 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1365 delegation_type = delegation->type;
1367 opendata->o_arg.u.delegation_type = delegation_type;
1368 status = nfs4_open_recover(opendata, state);
1369 nfs4_opendata_put(opendata);
1373 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1375 struct nfs_server *server = NFS_SERVER(state->inode);
1376 struct nfs4_exception exception = { };
1379 err = _nfs4_do_open_reclaim(ctx, state);
1380 if (err != -NFS4ERR_DELAY)
1382 nfs4_handle_exception(server, err, &exception);
1383 } while (exception.retry);
1387 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1389 struct nfs_open_context *ctx;
1392 ctx = nfs4_state_find_open_context(state);
1394 return PTR_ERR(ctx);
1395 ret = nfs4_do_open_reclaim(ctx, state);
1396 put_nfs_open_context(ctx);
1400 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1402 struct nfs4_opendata *opendata;
1405 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1406 if (IS_ERR(opendata))
1407 return PTR_ERR(opendata);
1408 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1409 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1410 ret = nfs4_open_recover(opendata, state);
1411 nfs4_opendata_put(opendata);
1415 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1417 struct nfs4_exception exception = { };
1418 struct nfs_server *server = NFS_SERVER(state->inode);
1421 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1427 case -NFS4ERR_BADSESSION:
1428 case -NFS4ERR_BADSLOT:
1429 case -NFS4ERR_BAD_HIGH_SLOT:
1430 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1431 case -NFS4ERR_DEADSESSION:
1432 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1434 case -NFS4ERR_STALE_CLIENTID:
1435 case -NFS4ERR_STALE_STATEID:
1436 case -NFS4ERR_EXPIRED:
1437 /* Don't recall a delegation if it was lost */
1438 nfs4_schedule_lease_recovery(server->nfs_client);
1442 * The show must go on: exit, but mark the
1443 * stateid as needing recovery.
1445 case -NFS4ERR_DELEG_REVOKED:
1446 case -NFS4ERR_ADMIN_REVOKED:
1447 case -NFS4ERR_BAD_STATEID:
1448 nfs_inode_find_state_and_recover(state->inode,
1450 nfs4_schedule_stateid_recovery(server, state);
1453 * User RPCSEC_GSS context has expired.
1454 * We cannot recover this stateid now, so
1455 * skip it and allow recovery thread to
1462 err = nfs4_handle_exception(server, err, &exception);
1463 } while (exception.retry);
1468 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1470 struct nfs4_opendata *data = calldata;
1472 data->rpc_status = task->tk_status;
1473 if (data->rpc_status == 0) {
1474 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1475 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1476 renew_lease(data->o_res.server, data->timestamp);
1481 static void nfs4_open_confirm_release(void *calldata)
1483 struct nfs4_opendata *data = calldata;
1484 struct nfs4_state *state = NULL;
1486 /* If this request hasn't been cancelled, do nothing */
1487 if (data->cancelled == 0)
1489 /* In case of error, no cleanup! */
1490 if (!data->rpc_done)
1492 state = nfs4_opendata_to_nfs4_state(data);
1494 nfs4_close_state(state, data->o_arg.fmode);
1496 nfs4_opendata_put(data);
1499 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1500 .rpc_call_done = nfs4_open_confirm_done,
1501 .rpc_release = nfs4_open_confirm_release,
1505 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1507 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1509 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1510 struct rpc_task *task;
1511 struct rpc_message msg = {
1512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1513 .rpc_argp = &data->c_arg,
1514 .rpc_resp = &data->c_res,
1515 .rpc_cred = data->owner->so_cred,
1517 struct rpc_task_setup task_setup_data = {
1518 .rpc_client = server->client,
1519 .rpc_message = &msg,
1520 .callback_ops = &nfs4_open_confirm_ops,
1521 .callback_data = data,
1522 .workqueue = nfsiod_workqueue,
1523 .flags = RPC_TASK_ASYNC,
1527 kref_get(&data->kref);
1529 data->rpc_status = 0;
1530 data->timestamp = jiffies;
1531 task = rpc_run_task(&task_setup_data);
1533 return PTR_ERR(task);
1534 status = nfs4_wait_for_completion_rpc_task(task);
1536 data->cancelled = 1;
1539 status = data->rpc_status;
1544 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1546 struct nfs4_opendata *data = calldata;
1547 struct nfs4_state_owner *sp = data->owner;
1549 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1552 * Check if we still need to send an OPEN call, or if we can use
1553 * a delegation instead.
1555 if (data->state != NULL) {
1556 struct nfs_delegation *delegation;
1558 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1561 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1562 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1563 can_open_delegated(delegation, data->o_arg.fmode))
1564 goto unlock_no_action;
1567 /* Update client id. */
1568 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1569 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1570 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1571 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1572 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1574 data->timestamp = jiffies;
1575 if (nfs4_setup_sequence(data->o_arg.server,
1576 &data->o_arg.seq_args,
1577 &data->o_res.seq_res,
1579 nfs_release_seqid(data->o_arg.seqid);
1581 rpc_call_start(task);
1586 task->tk_action = NULL;
1590 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1592 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1593 nfs4_open_prepare(task, calldata);
1596 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1598 struct nfs4_opendata *data = calldata;
1600 data->rpc_status = task->tk_status;
1602 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1605 if (task->tk_status == 0) {
1606 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1607 switch (data->o_res.f_attr->mode & S_IFMT) {
1611 data->rpc_status = -ELOOP;
1614 data->rpc_status = -EISDIR;
1617 data->rpc_status = -ENOTDIR;
1620 renew_lease(data->o_res.server, data->timestamp);
1621 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1622 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1627 static void nfs4_open_release(void *calldata)
1629 struct nfs4_opendata *data = calldata;
1630 struct nfs4_state *state = NULL;
1632 /* If this request hasn't been cancelled, do nothing */
1633 if (data->cancelled == 0)
1635 /* In case of error, no cleanup! */
1636 if (data->rpc_status != 0 || !data->rpc_done)
1638 /* In case we need an open_confirm, no cleanup! */
1639 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1641 state = nfs4_opendata_to_nfs4_state(data);
1643 nfs4_close_state(state, data->o_arg.fmode);
1645 nfs4_opendata_put(data);
1648 static const struct rpc_call_ops nfs4_open_ops = {
1649 .rpc_call_prepare = nfs4_open_prepare,
1650 .rpc_call_done = nfs4_open_done,
1651 .rpc_release = nfs4_open_release,
1654 static const struct rpc_call_ops nfs4_recover_open_ops = {
1655 .rpc_call_prepare = nfs4_recover_open_prepare,
1656 .rpc_call_done = nfs4_open_done,
1657 .rpc_release = nfs4_open_release,
1660 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1662 struct inode *dir = data->dir->d_inode;
1663 struct nfs_server *server = NFS_SERVER(dir);
1664 struct nfs_openargs *o_arg = &data->o_arg;
1665 struct nfs_openres *o_res = &data->o_res;
1666 struct rpc_task *task;
1667 struct rpc_message msg = {
1668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1671 .rpc_cred = data->owner->so_cred,
1673 struct rpc_task_setup task_setup_data = {
1674 .rpc_client = server->client,
1675 .rpc_message = &msg,
1676 .callback_ops = &nfs4_open_ops,
1677 .callback_data = data,
1678 .workqueue = nfsiod_workqueue,
1679 .flags = RPC_TASK_ASYNC,
1683 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1684 kref_get(&data->kref);
1686 data->rpc_status = 0;
1687 data->cancelled = 0;
1689 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1690 task = rpc_run_task(&task_setup_data);
1692 return PTR_ERR(task);
1693 status = nfs4_wait_for_completion_rpc_task(task);
1695 data->cancelled = 1;
1698 status = data->rpc_status;
1704 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1706 struct inode *dir = data->dir->d_inode;
1707 struct nfs_openres *o_res = &data->o_res;
1710 status = nfs4_run_open_task(data, 1);
1711 if (status != 0 || !data->rpc_done)
1714 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1716 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1717 status = _nfs4_proc_open_confirm(data);
1725 static int nfs4_opendata_access(struct rpc_cred *cred,
1726 struct nfs4_opendata *opendata,
1727 struct nfs4_state *state, fmode_t fmode)
1729 struct nfs_access_entry cache;
1732 /* access call failed or for some reason the server doesn't
1733 * support any access modes -- defer access call until later */
1734 if (opendata->o_res.access_supported == 0)
1738 /* don't check MAY_WRITE - a newly created file may not have
1739 * write mode bits, but POSIX allows the creating process to write */
1740 if (fmode & FMODE_READ)
1742 if (fmode & FMODE_EXEC)
1746 cache.jiffies = jiffies;
1747 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1748 nfs_access_add_cache(state->inode, &cache);
1750 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1753 /* even though OPEN succeeded, access is denied. Close the file */
1754 nfs4_close_state(state, fmode);
1759 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1761 static int _nfs4_proc_open(struct nfs4_opendata *data)
1763 struct inode *dir = data->dir->d_inode;
1764 struct nfs_server *server = NFS_SERVER(dir);
1765 struct nfs_openargs *o_arg = &data->o_arg;
1766 struct nfs_openres *o_res = &data->o_res;
1769 status = nfs4_run_open_task(data, 0);
1770 if (!data->rpc_done)
1773 if (status == -NFS4ERR_BADNAME &&
1774 !(o_arg->open_flags & O_CREAT))
1779 nfs_fattr_map_and_free_names(server, &data->f_attr);
1781 if (o_arg->open_flags & O_CREAT)
1782 update_changeattr(dir, &o_res->cinfo);
1783 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1784 server->caps &= ~NFS_CAP_POSIX_LOCK;
1785 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1786 status = _nfs4_proc_open_confirm(data);
1790 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1791 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1795 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1800 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1801 ret = nfs4_wait_clnt_recover(clp);
1804 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1805 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1807 nfs4_schedule_state_manager(clp);
1813 static int nfs4_recover_expired_lease(struct nfs_server *server)
1815 return nfs4_client_recover_expired_lease(server->nfs_client);
1820 * reclaim state on the server after a network partition.
1821 * Assumes caller holds the appropriate lock
1823 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1825 struct nfs4_opendata *opendata;
1828 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1829 if (IS_ERR(opendata))
1830 return PTR_ERR(opendata);
1831 ret = nfs4_open_recover(opendata, state);
1833 d_drop(ctx->dentry);
1834 nfs4_opendata_put(opendata);
1838 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1840 struct nfs_server *server = NFS_SERVER(state->inode);
1841 struct nfs4_exception exception = { };
1845 err = _nfs4_open_expired(ctx, state);
1849 case -NFS4ERR_GRACE:
1850 case -NFS4ERR_DELAY:
1851 nfs4_handle_exception(server, err, &exception);
1854 } while (exception.retry);
1859 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1861 struct nfs_open_context *ctx;
1864 ctx = nfs4_state_find_open_context(state);
1866 return PTR_ERR(ctx);
1867 ret = nfs4_do_open_expired(ctx, state);
1868 put_nfs_open_context(ctx);
1872 #if defined(CONFIG_NFS_V4_1)
1873 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1875 struct nfs_server *server = NFS_SERVER(state->inode);
1876 nfs4_stateid *stateid = &state->stateid;
1879 /* If a state reset has been done, test_stateid is unneeded */
1880 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1883 status = nfs41_test_stateid(server, stateid);
1884 if (status != NFS_OK) {
1885 /* Free the stateid unless the server explicitly
1886 * informs us the stateid is unrecognized. */
1887 if (status != -NFS4ERR_BAD_STATEID)
1888 nfs41_free_stateid(server, stateid);
1889 nfs_remove_bad_delegation(state->inode);
1891 write_seqlock(&state->seqlock);
1892 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1893 write_sequnlock(&state->seqlock);
1894 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1899 * nfs41_check_open_stateid - possibly free an open stateid
1901 * @state: NFSv4 state for an inode
1903 * Returns NFS_OK if recovery for this stateid is now finished.
1904 * Otherwise a negative NFS4ERR value is returned.
1906 static int nfs41_check_open_stateid(struct nfs4_state *state)
1908 struct nfs_server *server = NFS_SERVER(state->inode);
1909 nfs4_stateid *stateid = &state->open_stateid;
1912 /* If a state reset has been done, test_stateid is unneeded */
1913 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1914 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1915 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1916 return -NFS4ERR_BAD_STATEID;
1918 status = nfs41_test_stateid(server, stateid);
1919 if (status != NFS_OK) {
1920 /* Free the stateid unless the server explicitly
1921 * informs us the stateid is unrecognized. */
1922 if (status != -NFS4ERR_BAD_STATEID)
1923 nfs41_free_stateid(server, stateid);
1925 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1926 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1927 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1932 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1936 nfs41_clear_delegation_stateid(state);
1937 status = nfs41_check_open_stateid(state);
1938 if (status != NFS_OK)
1939 status = nfs4_open_expired(sp, state);
1945 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1946 * fields corresponding to attributes that were used to store the verifier.
1947 * Make sure we clobber those fields in the later setattr call
1949 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1951 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1952 !(sattr->ia_valid & ATTR_ATIME_SET))
1953 sattr->ia_valid |= ATTR_ATIME;
1955 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1956 !(sattr->ia_valid & ATTR_MTIME_SET))
1957 sattr->ia_valid |= ATTR_MTIME;
1961 * Returns a referenced nfs4_state
1963 static int _nfs4_do_open(struct inode *dir,
1964 struct dentry *dentry,
1967 struct iattr *sattr,
1968 struct rpc_cred *cred,
1969 struct nfs4_state **res,
1970 struct nfs4_threshold **ctx_th)
1972 struct nfs4_state_owner *sp;
1973 struct nfs4_state *state = NULL;
1974 struct nfs_server *server = NFS_SERVER(dir);
1975 struct nfs4_opendata *opendata;
1978 /* Protect against reboot recovery conflicts */
1980 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1982 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1985 status = nfs4_recover_expired_lease(server);
1987 goto err_put_state_owner;
1988 if (dentry->d_inode != NULL)
1989 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1991 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1992 if (opendata == NULL)
1993 goto err_put_state_owner;
1995 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1996 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1997 if (!opendata->f_attr.mdsthreshold)
1998 goto err_opendata_put;
1999 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2001 if (dentry->d_inode != NULL)
2002 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2004 status = _nfs4_proc_open(opendata);
2006 goto err_opendata_put;
2008 state = nfs4_opendata_to_nfs4_state(opendata);
2009 status = PTR_ERR(state);
2011 goto err_opendata_put;
2012 if (server->caps & NFS_CAP_POSIX_LOCK)
2013 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2015 status = nfs4_opendata_access(cred, opendata, state, fmode);
2017 goto err_opendata_put;
2019 if (opendata->o_arg.open_flags & O_EXCL) {
2020 nfs4_exclusive_attrset(opendata, sattr);
2022 nfs_fattr_init(opendata->o_res.f_attr);
2023 status = nfs4_do_setattr(state->inode, cred,
2024 opendata->o_res.f_attr, sattr,
2027 nfs_setattr_update_inode(state->inode, sattr);
2028 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2031 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2032 *ctx_th = opendata->f_attr.mdsthreshold;
2034 kfree(opendata->f_attr.mdsthreshold);
2035 opendata->f_attr.mdsthreshold = NULL;
2037 nfs4_opendata_put(opendata);
2038 nfs4_put_state_owner(sp);
2042 kfree(opendata->f_attr.mdsthreshold);
2043 nfs4_opendata_put(opendata);
2044 err_put_state_owner:
2045 nfs4_put_state_owner(sp);
2052 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2053 struct dentry *dentry,
2056 struct iattr *sattr,
2057 struct rpc_cred *cred,
2058 struct nfs4_threshold **ctx_th)
2060 struct nfs4_exception exception = { };
2061 struct nfs4_state *res;
2064 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
2066 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2070 /* NOTE: BAD_SEQID means the server and client disagree about the
2071 * book-keeping w.r.t. state-changing operations
2072 * (OPEN/CLOSE/LOCK/LOCKU...)
2073 * It is actually a sign of a bug on the client or on the server.
2075 * If we receive a BAD_SEQID error in the particular case of
2076 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2077 * have unhashed the old state_owner for us, and that we can
2078 * therefore safely retry using a new one. We should still warn
2079 * the user though...
2081 if (status == -NFS4ERR_BAD_SEQID) {
2082 pr_warn_ratelimited("NFS: v4 server %s "
2083 " returned a bad sequence-id error!\n",
2084 NFS_SERVER(dir)->nfs_client->cl_hostname);
2085 exception.retry = 1;
2089 * BAD_STATEID on OPEN means that the server cancelled our
2090 * state before it received the OPEN_CONFIRM.
2091 * Recover by retrying the request as per the discussion
2092 * on Page 181 of RFC3530.
2094 if (status == -NFS4ERR_BAD_STATEID) {
2095 exception.retry = 1;
2098 if (status == -EAGAIN) {
2099 /* We must have found a delegation */
2100 exception.retry = 1;
2103 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2104 status, &exception));
2105 } while (exception.retry);
2109 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2110 struct nfs_fattr *fattr, struct iattr *sattr,
2111 struct nfs4_state *state)
2113 struct nfs_server *server = NFS_SERVER(inode);
2114 struct nfs_setattrargs arg = {
2115 .fh = NFS_FH(inode),
2118 .bitmask = server->attr_bitmask,
2120 struct nfs_setattrres res = {
2124 struct rpc_message msg = {
2125 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2130 unsigned long timestamp = jiffies;
2133 nfs_fattr_init(fattr);
2135 if (state != NULL) {
2136 struct nfs_lockowner lockowner = {
2137 .l_owner = current->files,
2138 .l_pid = current->tgid,
2140 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2142 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2144 /* Use that stateid */
2146 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2148 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2149 if (status == 0 && state != NULL)
2150 renew_lease(server, timestamp);
2154 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2155 struct nfs_fattr *fattr, struct iattr *sattr,
2156 struct nfs4_state *state)
2158 struct nfs_server *server = NFS_SERVER(inode);
2159 struct nfs4_exception exception = {
2165 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2167 case -NFS4ERR_OPENMODE:
2168 if (state && !(state->state & FMODE_WRITE)) {
2170 if (sattr->ia_valid & ATTR_OPEN)
2175 err = nfs4_handle_exception(server, err, &exception);
2176 } while (exception.retry);
2181 struct nfs4_closedata {
2182 struct inode *inode;
2183 struct nfs4_state *state;
2184 struct nfs_closeargs arg;
2185 struct nfs_closeres res;
2186 struct nfs_fattr fattr;
2187 unsigned long timestamp;
2192 static void nfs4_free_closedata(void *data)
2194 struct nfs4_closedata *calldata = data;
2195 struct nfs4_state_owner *sp = calldata->state->owner;
2196 struct super_block *sb = calldata->state->inode->i_sb;
2199 pnfs_roc_release(calldata->state->inode);
2200 nfs4_put_open_state(calldata->state);
2201 nfs_free_seqid(calldata->arg.seqid);
2202 nfs4_put_state_owner(sp);
2203 nfs_sb_deactive_async(sb);
2207 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2210 spin_lock(&state->owner->so_lock);
2211 if (!(fmode & FMODE_READ))
2212 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2213 if (!(fmode & FMODE_WRITE))
2214 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2215 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2216 spin_unlock(&state->owner->so_lock);
2219 static void nfs4_close_done(struct rpc_task *task, void *data)
2221 struct nfs4_closedata *calldata = data;
2222 struct nfs4_state *state = calldata->state;
2223 struct nfs_server *server = NFS_SERVER(calldata->inode);
2225 dprintk("%s: begin!\n", __func__);
2226 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2228 /* hmm. we are done with the inode, and in the process of freeing
2229 * the state_owner. we keep this around to process errors
2231 switch (task->tk_status) {
2234 pnfs_roc_set_barrier(state->inode,
2235 calldata->roc_barrier);
2236 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2237 renew_lease(server, calldata->timestamp);
2238 nfs4_close_clear_stateid_flags(state,
2239 calldata->arg.fmode);
2241 case -NFS4ERR_STALE_STATEID:
2242 case -NFS4ERR_OLD_STATEID:
2243 case -NFS4ERR_BAD_STATEID:
2244 case -NFS4ERR_EXPIRED:
2245 if (calldata->arg.fmode == 0)
2248 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2249 rpc_restart_call_prepare(task);
2251 nfs_release_seqid(calldata->arg.seqid);
2252 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2253 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2256 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2258 struct nfs4_closedata *calldata = data;
2259 struct nfs4_state *state = calldata->state;
2260 struct inode *inode = calldata->inode;
2263 dprintk("%s: begin!\n", __func__);
2264 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2267 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2268 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2269 spin_lock(&state->owner->so_lock);
2270 /* Calculate the change in open mode */
2271 if (state->n_rdwr == 0) {
2272 if (state->n_rdonly == 0) {
2273 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2274 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2275 calldata->arg.fmode &= ~FMODE_READ;
2277 if (state->n_wronly == 0) {
2278 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2279 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2280 calldata->arg.fmode &= ~FMODE_WRITE;
2283 spin_unlock(&state->owner->so_lock);
2286 /* Note: exit _without_ calling nfs4_close_done */
2287 task->tk_action = NULL;
2291 if (calldata->arg.fmode == 0) {
2292 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2293 if (calldata->roc &&
2294 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
2298 nfs_fattr_init(calldata->res.fattr);
2299 calldata->timestamp = jiffies;
2300 if (nfs4_setup_sequence(NFS_SERVER(inode),
2301 &calldata->arg.seq_args,
2302 &calldata->res.seq_res,
2304 nfs_release_seqid(calldata->arg.seqid);
2306 rpc_call_start(task);
2308 dprintk("%s: done!\n", __func__);
2311 static const struct rpc_call_ops nfs4_close_ops = {
2312 .rpc_call_prepare = nfs4_close_prepare,
2313 .rpc_call_done = nfs4_close_done,
2314 .rpc_release = nfs4_free_closedata,
2318 * It is possible for data to be read/written from a mem-mapped file
2319 * after the sys_close call (which hits the vfs layer as a flush).
2320 * This means that we can't safely call nfsv4 close on a file until
2321 * the inode is cleared. This in turn means that we are not good
2322 * NFSv4 citizens - we do not indicate to the server to update the file's
2323 * share state even when we are done with one of the three share
2324 * stateid's in the inode.
2326 * NOTE: Caller must be holding the sp->so_owner semaphore!
2328 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2330 struct nfs_server *server = NFS_SERVER(state->inode);
2331 struct nfs4_closedata *calldata;
2332 struct nfs4_state_owner *sp = state->owner;
2333 struct rpc_task *task;
2334 struct rpc_message msg = {
2335 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2336 .rpc_cred = state->owner->so_cred,
2338 struct rpc_task_setup task_setup_data = {
2339 .rpc_client = server->client,
2340 .rpc_message = &msg,
2341 .callback_ops = &nfs4_close_ops,
2342 .workqueue = nfsiod_workqueue,
2343 .flags = RPC_TASK_ASYNC,
2345 int status = -ENOMEM;
2347 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2348 if (calldata == NULL)
2350 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2351 calldata->inode = state->inode;
2352 calldata->state = state;
2353 calldata->arg.fh = NFS_FH(state->inode);
2354 calldata->arg.stateid = &state->open_stateid;
2355 /* Serialization for the sequence id */
2356 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2357 if (calldata->arg.seqid == NULL)
2358 goto out_free_calldata;
2359 calldata->arg.fmode = 0;
2360 calldata->arg.bitmask = server->cache_consistency_bitmask;
2361 calldata->res.fattr = &calldata->fattr;
2362 calldata->res.seqid = calldata->arg.seqid;
2363 calldata->res.server = server;
2364 calldata->roc = pnfs_roc(state->inode);
2365 nfs_sb_active(calldata->inode->i_sb);
2367 msg.rpc_argp = &calldata->arg;
2368 msg.rpc_resp = &calldata->res;
2369 task_setup_data.callback_data = calldata;
2370 task = rpc_run_task(&task_setup_data);
2372 return PTR_ERR(task);
2375 status = rpc_wait_for_completion_task(task);
2381 nfs4_put_open_state(state);
2382 nfs4_put_state_owner(sp);
2386 static struct inode *
2387 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2389 struct nfs4_state *state;
2391 /* Protect against concurrent sillydeletes */
2392 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2393 ctx->cred, &ctx->mdsthreshold);
2395 return ERR_CAST(state);
2397 return igrab(state->inode);
2400 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2402 if (ctx->state == NULL)
2405 nfs4_close_sync(ctx->state, ctx->mode);
2407 nfs4_close_state(ctx->state, ctx->mode);
2410 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2412 struct nfs4_server_caps_arg args = {
2415 struct nfs4_server_caps_res res = {};
2416 struct rpc_message msg = {
2417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2423 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2425 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2426 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2427 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2428 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2429 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2430 NFS_CAP_CTIME|NFS_CAP_MTIME);
2431 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2432 server->caps |= NFS_CAP_ACLS;
2433 if (res.has_links != 0)
2434 server->caps |= NFS_CAP_HARDLINKS;
2435 if (res.has_symlinks != 0)
2436 server->caps |= NFS_CAP_SYMLINKS;
2437 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2438 server->caps |= NFS_CAP_FILEID;
2439 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2440 server->caps |= NFS_CAP_MODE;
2441 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2442 server->caps |= NFS_CAP_NLINK;
2443 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2444 server->caps |= NFS_CAP_OWNER;
2445 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2446 server->caps |= NFS_CAP_OWNER_GROUP;
2447 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2448 server->caps |= NFS_CAP_ATIME;
2449 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2450 server->caps |= NFS_CAP_CTIME;
2451 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2452 server->caps |= NFS_CAP_MTIME;
2454 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2455 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2456 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2457 server->acl_bitmask = res.acl_bitmask;
2458 server->fh_expire_type = res.fh_expire_type;
2464 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2466 struct nfs4_exception exception = { };
2469 err = nfs4_handle_exception(server,
2470 _nfs4_server_capabilities(server, fhandle),
2472 } while (exception.retry);
2476 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2477 struct nfs_fsinfo *info)
2479 struct nfs4_lookup_root_arg args = {
2480 .bitmask = nfs4_fattr_bitmap,
2482 struct nfs4_lookup_res res = {
2484 .fattr = info->fattr,
2487 struct rpc_message msg = {
2488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2493 nfs_fattr_init(info->fattr);
2494 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2497 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2498 struct nfs_fsinfo *info)
2500 struct nfs4_exception exception = { };
2503 err = _nfs4_lookup_root(server, fhandle, info);
2506 case -NFS4ERR_WRONGSEC:
2509 err = nfs4_handle_exception(server, err, &exception);
2511 } while (exception.retry);
2516 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2517 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2519 struct rpc_auth *auth;
2522 auth = rpcauth_create(flavor, server->client);
2527 ret = nfs4_lookup_root(server, fhandle, info);
2532 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2533 struct nfs_fsinfo *info)
2535 int i, len, status = 0;
2536 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2538 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2542 for (i = 0; i < len; i++) {
2543 /* AUTH_UNIX is the default flavor if none was specified,
2544 * thus has already been tried. */
2545 if (flav_array[i] == RPC_AUTH_UNIX)
2548 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2549 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2554 * -EACCESS could mean that the user doesn't have correct permissions
2555 * to access the mount. It could also mean that we tried to mount
2556 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2557 * existing mount programs don't handle -EACCES very well so it should
2558 * be mapped to -EPERM instead.
2560 if (status == -EACCES)
2566 * get the file handle for the "/" directory on the server
2568 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2569 struct nfs_fsinfo *info)
2571 int minor_version = server->nfs_client->cl_minorversion;
2572 int status = nfs4_lookup_root(server, fhandle, info);
2573 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2575 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2576 * by nfs4_map_errors() as this function exits.
2578 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2580 status = nfs4_server_capabilities(server, fhandle);
2582 status = nfs4_do_fsinfo(server, fhandle, info);
2583 return nfs4_map_errors(status);
2586 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2587 struct nfs_fsinfo *info)
2590 struct nfs_fattr *fattr = info->fattr;
2592 error = nfs4_server_capabilities(server, mntfh);
2594 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2598 error = nfs4_proc_getattr(server, mntfh, fattr);
2600 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2604 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2605 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2606 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2612 * Get locations and (maybe) other attributes of a referral.
2613 * Note that we'll actually follow the referral later when
2614 * we detect fsid mismatch in inode revalidation
2616 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2617 const struct qstr *name, struct nfs_fattr *fattr,
2618 struct nfs_fh *fhandle)
2620 int status = -ENOMEM;
2621 struct page *page = NULL;
2622 struct nfs4_fs_locations *locations = NULL;
2624 page = alloc_page(GFP_KERNEL);
2627 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2628 if (locations == NULL)
2631 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2634 /* Make sure server returned a different fsid for the referral */
2635 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2636 dprintk("%s: server did not return a different fsid for"
2637 " a referral at %s\n", __func__, name->name);
2641 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2642 nfs_fixup_referral_attributes(&locations->fattr);
2644 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2645 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2646 memset(fhandle, 0, sizeof(struct nfs_fh));
2654 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2656 struct nfs4_getattr_arg args = {
2658 .bitmask = server->attr_bitmask,
2660 struct nfs4_getattr_res res = {
2664 struct rpc_message msg = {
2665 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2670 nfs_fattr_init(fattr);
2671 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2674 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2676 struct nfs4_exception exception = { };
2679 err = nfs4_handle_exception(server,
2680 _nfs4_proc_getattr(server, fhandle, fattr),
2682 } while (exception.retry);
2687 * The file is not closed if it is opened due to the a request to change
2688 * the size of the file. The open call will not be needed once the
2689 * VFS layer lookup-intents are implemented.
2691 * Close is called when the inode is destroyed.
2692 * If we haven't opened the file for O_WRONLY, we
2693 * need to in the size_change case to obtain a stateid.
2696 * Because OPEN is always done by name in nfsv4, it is
2697 * possible that we opened a different file by the same
2698 * name. We can recognize this race condition, but we
2699 * can't do anything about it besides returning an error.
2701 * This will be fixed with VFS changes (lookup-intent).
2704 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2705 struct iattr *sattr)
2707 struct inode *inode = dentry->d_inode;
2708 struct rpc_cred *cred = NULL;
2709 struct nfs4_state *state = NULL;
2712 if (pnfs_ld_layoutret_on_setattr(inode))
2713 pnfs_return_layout(inode);
2715 nfs_fattr_init(fattr);
2717 /* Deal with open(O_TRUNC) */
2718 if (sattr->ia_valid & ATTR_OPEN)
2719 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2721 /* Optimization: if the end result is no change, don't RPC */
2722 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2725 /* Search for an existing open(O_WRITE) file */
2726 if (sattr->ia_valid & ATTR_FILE) {
2727 struct nfs_open_context *ctx;
2729 ctx = nfs_file_open_context(sattr->ia_file);
2736 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2738 nfs_setattr_update_inode(inode, sattr);
2742 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2743 const struct qstr *name, struct nfs_fh *fhandle,
2744 struct nfs_fattr *fattr)
2746 struct nfs_server *server = NFS_SERVER(dir);
2748 struct nfs4_lookup_arg args = {
2749 .bitmask = server->attr_bitmask,
2750 .dir_fh = NFS_FH(dir),
2753 struct nfs4_lookup_res res = {
2758 struct rpc_message msg = {
2759 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2764 nfs_fattr_init(fattr);
2766 dprintk("NFS call lookup %s\n", name->name);
2767 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2768 dprintk("NFS reply lookup: %d\n", status);
2772 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2774 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2775 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2776 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2780 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2781 struct qstr *name, struct nfs_fh *fhandle,
2782 struct nfs_fattr *fattr)
2784 struct nfs4_exception exception = { };
2785 struct rpc_clnt *client = *clnt;
2788 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2790 case -NFS4ERR_BADNAME:
2793 case -NFS4ERR_MOVED:
2794 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2796 case -NFS4ERR_WRONGSEC:
2798 if (client != *clnt)
2801 client = nfs4_create_sec_client(client, dir, name);
2803 return PTR_ERR(client);
2805 exception.retry = 1;
2808 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2810 } while (exception.retry);
2815 else if (client != *clnt)
2816 rpc_shutdown_client(client);
2821 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2822 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2825 struct rpc_clnt *client = NFS_CLIENT(dir);
2827 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2828 if (client != NFS_CLIENT(dir)) {
2829 rpc_shutdown_client(client);
2830 nfs_fixup_secinfo_attributes(fattr);
2836 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2837 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2840 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2842 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2844 rpc_shutdown_client(client);
2845 return ERR_PTR(status);
2850 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2852 struct nfs_server *server = NFS_SERVER(inode);
2853 struct nfs4_accessargs args = {
2854 .fh = NFS_FH(inode),
2855 .bitmask = server->cache_consistency_bitmask,
2857 struct nfs4_accessres res = {
2860 struct rpc_message msg = {
2861 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2864 .rpc_cred = entry->cred,
2866 int mode = entry->mask;
2870 * Determine which access bits we want to ask for...
2872 if (mode & MAY_READ)
2873 args.access |= NFS4_ACCESS_READ;
2874 if (S_ISDIR(inode->i_mode)) {
2875 if (mode & MAY_WRITE)
2876 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2877 if (mode & MAY_EXEC)
2878 args.access |= NFS4_ACCESS_LOOKUP;
2880 if (mode & MAY_WRITE)
2881 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2882 if (mode & MAY_EXEC)
2883 args.access |= NFS4_ACCESS_EXECUTE;
2886 res.fattr = nfs_alloc_fattr();
2887 if (res.fattr == NULL)
2890 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2892 nfs_access_set_mask(entry, res.access);
2893 nfs_refresh_inode(inode, res.fattr);
2895 nfs_free_fattr(res.fattr);
2899 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2901 struct nfs4_exception exception = { };
2904 err = nfs4_handle_exception(NFS_SERVER(inode),
2905 _nfs4_proc_access(inode, entry),
2907 } while (exception.retry);
2912 * TODO: For the time being, we don't try to get any attributes
2913 * along with any of the zero-copy operations READ, READDIR,
2916 * In the case of the first three, we want to put the GETATTR
2917 * after the read-type operation -- this is because it is hard
2918 * to predict the length of a GETATTR response in v4, and thus
2919 * align the READ data correctly. This means that the GETATTR
2920 * may end up partially falling into the page cache, and we should
2921 * shift it into the 'tail' of the xdr_buf before processing.
2922 * To do this efficiently, we need to know the total length
2923 * of data received, which doesn't seem to be available outside
2926 * In the case of WRITE, we also want to put the GETATTR after
2927 * the operation -- in this case because we want to make sure
2928 * we get the post-operation mtime and size.
2930 * Both of these changes to the XDR layer would in fact be quite
2931 * minor, but I decided to leave them for a subsequent patch.
2933 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2934 unsigned int pgbase, unsigned int pglen)
2936 struct nfs4_readlink args = {
2937 .fh = NFS_FH(inode),
2942 struct nfs4_readlink_res res;
2943 struct rpc_message msg = {
2944 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2949 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2952 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2953 unsigned int pgbase, unsigned int pglen)
2955 struct nfs4_exception exception = { };
2958 err = nfs4_handle_exception(NFS_SERVER(inode),
2959 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2961 } while (exception.retry);
2966 * This is just for mknod. open(O_CREAT) will always do ->open_context().
2969 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2972 struct nfs_open_context *ctx;
2973 struct nfs4_state *state;
2976 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2978 return PTR_ERR(ctx);
2980 sattr->ia_mode &= ~current_umask();
2981 state = nfs4_do_open(dir, dentry, ctx->mode,
2982 flags, sattr, ctx->cred,
2983 &ctx->mdsthreshold);
2985 if (IS_ERR(state)) {
2986 status = PTR_ERR(state);
2989 d_add(dentry, igrab(state->inode));
2990 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2993 put_nfs_open_context(ctx);
2997 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2999 struct nfs_server *server = NFS_SERVER(dir);
3000 struct nfs_removeargs args = {
3004 struct nfs_removeres res = {
3007 struct rpc_message msg = {
3008 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3014 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3016 update_changeattr(dir, &res.cinfo);
3020 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3022 struct nfs4_exception exception = { };
3025 err = nfs4_handle_exception(NFS_SERVER(dir),
3026 _nfs4_proc_remove(dir, name),
3028 } while (exception.retry);
3032 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3034 struct nfs_server *server = NFS_SERVER(dir);
3035 struct nfs_removeargs *args = msg->rpc_argp;
3036 struct nfs_removeres *res = msg->rpc_resp;
3038 res->server = server;
3039 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3040 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
3043 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3045 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
3046 &data->args.seq_args,
3050 rpc_call_start(task);
3053 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3055 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3057 if (!nfs4_sequence_done(task, &res->seq_res))
3059 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3061 update_changeattr(dir, &res->cinfo);
3065 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3067 struct nfs_server *server = NFS_SERVER(dir);
3068 struct nfs_renameargs *arg = msg->rpc_argp;
3069 struct nfs_renameres *res = msg->rpc_resp;
3071 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3072 res->server = server;
3073 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
3076 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3078 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3079 &data->args.seq_args,
3083 rpc_call_start(task);
3086 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3087 struct inode *new_dir)
3089 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3091 if (!nfs4_sequence_done(task, &res->seq_res))
3093 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3096 update_changeattr(old_dir, &res->old_cinfo);
3097 update_changeattr(new_dir, &res->new_cinfo);
3101 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3102 struct inode *new_dir, struct qstr *new_name)
3104 struct nfs_server *server = NFS_SERVER(old_dir);
3105 struct nfs_renameargs arg = {
3106 .old_dir = NFS_FH(old_dir),
3107 .new_dir = NFS_FH(new_dir),
3108 .old_name = old_name,
3109 .new_name = new_name,
3111 struct nfs_renameres res = {
3114 struct rpc_message msg = {
3115 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3119 int status = -ENOMEM;
3121 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3123 update_changeattr(old_dir, &res.old_cinfo);
3124 update_changeattr(new_dir, &res.new_cinfo);
3129 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3130 struct inode *new_dir, struct qstr *new_name)
3132 struct nfs4_exception exception = { };
3135 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3136 _nfs4_proc_rename(old_dir, old_name,
3139 } while (exception.retry);
3143 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3145 struct nfs_server *server = NFS_SERVER(inode);
3146 struct nfs4_link_arg arg = {
3147 .fh = NFS_FH(inode),
3148 .dir_fh = NFS_FH(dir),
3150 .bitmask = server->attr_bitmask,
3152 struct nfs4_link_res res = {
3155 struct rpc_message msg = {
3156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3160 int status = -ENOMEM;
3162 res.fattr = nfs_alloc_fattr();
3163 if (res.fattr == NULL)
3166 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3168 update_changeattr(dir, &res.cinfo);
3169 nfs_post_op_update_inode(inode, res.fattr);
3172 nfs_free_fattr(res.fattr);
3176 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3178 struct nfs4_exception exception = { };
3181 err = nfs4_handle_exception(NFS_SERVER(inode),
3182 _nfs4_proc_link(inode, dir, name),
3184 } while (exception.retry);
3188 struct nfs4_createdata {
3189 struct rpc_message msg;
3190 struct nfs4_create_arg arg;
3191 struct nfs4_create_res res;
3193 struct nfs_fattr fattr;
3196 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3197 struct qstr *name, struct iattr *sattr, u32 ftype)
3199 struct nfs4_createdata *data;
3201 data = kzalloc(sizeof(*data), GFP_KERNEL);
3203 struct nfs_server *server = NFS_SERVER(dir);
3205 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3206 data->msg.rpc_argp = &data->arg;
3207 data->msg.rpc_resp = &data->res;
3208 data->arg.dir_fh = NFS_FH(dir);
3209 data->arg.server = server;
3210 data->arg.name = name;
3211 data->arg.attrs = sattr;
3212 data->arg.ftype = ftype;
3213 data->arg.bitmask = server->attr_bitmask;
3214 data->res.server = server;
3215 data->res.fh = &data->fh;
3216 data->res.fattr = &data->fattr;
3217 nfs_fattr_init(data->res.fattr);
3222 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3224 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3225 &data->arg.seq_args, &data->res.seq_res, 1);
3227 update_changeattr(dir, &data->res.dir_cinfo);
3228 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3233 static void nfs4_free_createdata(struct nfs4_createdata *data)
3238 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3239 struct page *page, unsigned int len, struct iattr *sattr)
3241 struct nfs4_createdata *data;
3242 int status = -ENAMETOOLONG;
3244 if (len > NFS4_MAXPATHLEN)
3248 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3252 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3253 data->arg.u.symlink.pages = &page;
3254 data->arg.u.symlink.len = len;
3256 status = nfs4_do_create(dir, dentry, data);
3258 nfs4_free_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_exception exception = { };
3269 err = nfs4_handle_exception(NFS_SERVER(dir),
3270 _nfs4_proc_symlink(dir, dentry, page,
3273 } while (exception.retry);
3277 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3278 struct iattr *sattr)
3280 struct nfs4_createdata *data;
3281 int status = -ENOMEM;
3283 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3287 status = nfs4_do_create(dir, dentry, data);
3289 nfs4_free_createdata(data);
3294 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3295 struct iattr *sattr)
3297 struct nfs4_exception exception = { };
3300 sattr->ia_mode &= ~current_umask();
3302 err = nfs4_handle_exception(NFS_SERVER(dir),
3303 _nfs4_proc_mkdir(dir, dentry, sattr),
3305 } while (exception.retry);
3309 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3310 u64 cookie, struct page **pages, unsigned int count, int plus)
3312 struct inode *dir = dentry->d_inode;
3313 struct nfs4_readdir_arg args = {
3318 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3321 struct nfs4_readdir_res res;
3322 struct rpc_message msg = {
3323 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3330 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3331 dentry->d_parent->d_name.name,
3332 dentry->d_name.name,
3333 (unsigned long long)cookie);
3334 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3335 res.pgbase = args.pgbase;
3336 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3338 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3339 status += args.pgbase;
3342 nfs_invalidate_atime(dir);
3344 dprintk("%s: returns %d\n", __func__, status);
3348 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3349 u64 cookie, struct page **pages, unsigned int count, int plus)
3351 struct nfs4_exception exception = { };
3354 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3355 _nfs4_proc_readdir(dentry, cred, cookie,
3356 pages, count, plus),
3358 } while (exception.retry);
3362 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3363 struct iattr *sattr, dev_t rdev)
3365 struct nfs4_createdata *data;
3366 int mode = sattr->ia_mode;
3367 int status = -ENOMEM;
3369 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3374 data->arg.ftype = NF4FIFO;
3375 else if (S_ISBLK(mode)) {
3376 data->arg.ftype = NF4BLK;
3377 data->arg.u.device.specdata1 = MAJOR(rdev);
3378 data->arg.u.device.specdata2 = MINOR(rdev);
3380 else if (S_ISCHR(mode)) {
3381 data->arg.ftype = NF4CHR;
3382 data->arg.u.device.specdata1 = MAJOR(rdev);
3383 data->arg.u.device.specdata2 = MINOR(rdev);
3384 } else if (!S_ISSOCK(mode)) {
3389 status = nfs4_do_create(dir, dentry, data);
3391 nfs4_free_createdata(data);
3396 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3397 struct iattr *sattr, dev_t rdev)
3399 struct nfs4_exception exception = { };
3402 sattr->ia_mode &= ~current_umask();
3404 err = nfs4_handle_exception(NFS_SERVER(dir),
3405 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3407 } while (exception.retry);
3411 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3412 struct nfs_fsstat *fsstat)
3414 struct nfs4_statfs_arg args = {
3416 .bitmask = server->attr_bitmask,
3418 struct nfs4_statfs_res res = {
3421 struct rpc_message msg = {
3422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3427 nfs_fattr_init(fsstat->fattr);
3428 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3431 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3433 struct nfs4_exception exception = { };
3436 err = nfs4_handle_exception(server,
3437 _nfs4_proc_statfs(server, fhandle, fsstat),
3439 } while (exception.retry);
3443 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3444 struct nfs_fsinfo *fsinfo)
3446 struct nfs4_fsinfo_arg args = {
3448 .bitmask = server->attr_bitmask,
3450 struct nfs4_fsinfo_res res = {
3453 struct rpc_message msg = {
3454 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3459 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3462 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3464 struct nfs4_exception exception = { };
3468 err = nfs4_handle_exception(server,
3469 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3471 } while (exception.retry);
3475 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3479 nfs_fattr_init(fsinfo->fattr);
3480 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3482 /* block layout checks this! */
3483 server->pnfs_blksize = fsinfo->blksize;
3484 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3490 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3491 struct nfs_pathconf *pathconf)
3493 struct nfs4_pathconf_arg args = {
3495 .bitmask = server->attr_bitmask,
3497 struct nfs4_pathconf_res res = {
3498 .pathconf = pathconf,
3500 struct rpc_message msg = {
3501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3506 /* None of the pathconf attributes are mandatory to implement */
3507 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3508 memset(pathconf, 0, sizeof(*pathconf));
3512 nfs_fattr_init(pathconf->fattr);
3513 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3516 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3517 struct nfs_pathconf *pathconf)
3519 struct nfs4_exception exception = { };
3523 err = nfs4_handle_exception(server,
3524 _nfs4_proc_pathconf(server, fhandle, pathconf),
3526 } while (exception.retry);
3530 void __nfs4_read_done_cb(struct nfs_read_data *data)
3532 nfs_invalidate_atime(data->header->inode);
3535 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3537 struct nfs_server *server = NFS_SERVER(data->header->inode);
3539 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3540 rpc_restart_call_prepare(task);
3544 __nfs4_read_done_cb(data);
3545 if (task->tk_status > 0)
3546 renew_lease(server, data->timestamp);
3550 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3553 dprintk("--> %s\n", __func__);
3555 if (!nfs4_sequence_done(task, &data->res.seq_res))
3558 return data->read_done_cb ? data->read_done_cb(task, data) :
3559 nfs4_read_done_cb(task, data);
3562 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3564 data->timestamp = jiffies;
3565 data->read_done_cb = nfs4_read_done_cb;
3566 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3567 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3570 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3572 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3573 &data->args.seq_args,
3577 rpc_call_start(task);
3580 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3582 struct inode *inode = data->header->inode;
3584 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3585 rpc_restart_call_prepare(task);
3588 if (task->tk_status >= 0) {
3589 renew_lease(NFS_SERVER(inode), data->timestamp);
3590 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3595 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3597 if (!nfs4_sequence_done(task, &data->res.seq_res))
3599 return data->write_done_cb ? data->write_done_cb(task, data) :
3600 nfs4_write_done_cb(task, data);
3604 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3606 const struct nfs_pgio_header *hdr = data->header;
3608 /* Don't request attributes for pNFS or O_DIRECT writes */
3609 if (data->ds_clp != NULL || hdr->dreq != NULL)
3611 /* Otherwise, request attributes if and only if we don't hold
3614 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3617 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3619 struct nfs_server *server = NFS_SERVER(data->header->inode);
3621 if (!nfs4_write_need_cache_consistency_data(data)) {
3622 data->args.bitmask = NULL;
3623 data->res.fattr = NULL;
3625 data->args.bitmask = server->cache_consistency_bitmask;
3627 if (!data->write_done_cb)
3628 data->write_done_cb = nfs4_write_done_cb;
3629 data->res.server = server;
3630 data->timestamp = jiffies;
3632 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3633 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3636 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3638 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3639 &data->args.seq_args,
3643 rpc_call_start(task);
3646 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3648 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3649 &data->args.seq_args,
3653 rpc_call_start(task);
3656 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3658 struct inode *inode = data->inode;
3660 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3661 rpc_restart_call_prepare(task);
3667 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3669 if (!nfs4_sequence_done(task, &data->res.seq_res))
3671 return data->commit_done_cb(task, data);
3674 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3676 struct nfs_server *server = NFS_SERVER(data->inode);
3678 if (data->commit_done_cb == NULL)
3679 data->commit_done_cb = nfs4_commit_done_cb;
3680 data->res.server = server;
3681 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3682 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3685 struct nfs4_renewdata {
3686 struct nfs_client *client;
3687 unsigned long timestamp;
3691 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3692 * standalone procedure for queueing an asynchronous RENEW.
3694 static void nfs4_renew_release(void *calldata)
3696 struct nfs4_renewdata *data = calldata;
3697 struct nfs_client *clp = data->client;
3699 if (atomic_read(&clp->cl_count) > 1)
3700 nfs4_schedule_state_renewal(clp);
3701 nfs_put_client(clp);
3705 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3707 struct nfs4_renewdata *data = calldata;
3708 struct nfs_client *clp = data->client;
3709 unsigned long timestamp = data->timestamp;
3711 if (task->tk_status < 0) {
3712 /* Unless we're shutting down, schedule state recovery! */
3713 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3715 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3716 nfs4_schedule_lease_recovery(clp);
3719 nfs4_schedule_path_down_recovery(clp);
3721 do_renew_lease(clp, timestamp);
3724 static const struct rpc_call_ops nfs4_renew_ops = {
3725 .rpc_call_done = nfs4_renew_done,
3726 .rpc_release = nfs4_renew_release,
3729 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3731 struct rpc_message msg = {
3732 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3736 struct nfs4_renewdata *data;
3738 if (renew_flags == 0)
3740 if (!atomic_inc_not_zero(&clp->cl_count))
3742 data = kmalloc(sizeof(*data), GFP_NOFS);
3746 data->timestamp = jiffies;
3747 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3748 &nfs4_renew_ops, data);
3751 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3753 struct rpc_message msg = {
3754 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3758 unsigned long now = jiffies;
3761 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3764 do_renew_lease(clp, now);
3768 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3770 return (server->caps & NFS_CAP_ACLS)
3771 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3772 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3775 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3776 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3779 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3781 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3782 struct page **pages, unsigned int *pgbase)
3784 struct page *newpage, **spages;
3790 len = min_t(size_t, PAGE_SIZE, buflen);
3791 newpage = alloc_page(GFP_KERNEL);
3793 if (newpage == NULL)
3795 memcpy(page_address(newpage), buf, len);
3800 } while (buflen != 0);
3806 __free_page(spages[rc-1]);
3810 struct nfs4_cached_acl {
3816 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3818 struct nfs_inode *nfsi = NFS_I(inode);
3820 spin_lock(&inode->i_lock);
3821 kfree(nfsi->nfs4_acl);
3822 nfsi->nfs4_acl = acl;
3823 spin_unlock(&inode->i_lock);
3826 static void nfs4_zap_acl_attr(struct inode *inode)
3828 nfs4_set_cached_acl(inode, NULL);
3831 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3833 struct nfs_inode *nfsi = NFS_I(inode);
3834 struct nfs4_cached_acl *acl;
3837 spin_lock(&inode->i_lock);
3838 acl = nfsi->nfs4_acl;
3841 if (buf == NULL) /* user is just asking for length */
3843 if (acl->cached == 0)
3845 ret = -ERANGE; /* see getxattr(2) man page */
3846 if (acl->len > buflen)
3848 memcpy(buf, acl->data, acl->len);
3852 spin_unlock(&inode->i_lock);
3856 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3858 struct nfs4_cached_acl *acl;
3859 size_t buflen = sizeof(*acl) + acl_len;
3861 if (buflen <= PAGE_SIZE) {
3862 acl = kmalloc(buflen, GFP_KERNEL);
3866 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3868 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3875 nfs4_set_cached_acl(inode, acl);
3879 * The getxattr API returns the required buffer length when called with a
3880 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3881 * the required buf. On a NULL buf, we send a page of data to the server
3882 * guessing that the ACL request can be serviced by a page. If so, we cache
3883 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3884 * the cache. If not so, we throw away the page, and cache the required
3885 * length. The next getxattr call will then produce another round trip to
3886 * the server, this time with the input buf of the required size.
3888 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3890 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3891 struct nfs_getaclargs args = {
3892 .fh = NFS_FH(inode),
3896 struct nfs_getaclres res = {
3899 struct rpc_message msg = {
3900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3904 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3905 int ret = -ENOMEM, i;
3907 /* As long as we're doing a round trip to the server anyway,
3908 * let's be prepared for a page of acl data. */
3911 if (npages > ARRAY_SIZE(pages))
3914 for (i = 0; i < npages; i++) {
3915 pages[i] = alloc_page(GFP_KERNEL);
3920 /* for decoding across pages */
3921 res.acl_scratch = alloc_page(GFP_KERNEL);
3922 if (!res.acl_scratch)
3925 args.acl_len = npages * PAGE_SIZE;
3926 args.acl_pgbase = 0;
3928 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3929 __func__, buf, buflen, npages, args.acl_len);
3930 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3931 &msg, &args.seq_args, &res.seq_res, 0);
3935 /* Handle the case where the passed-in buffer is too short */
3936 if (res.acl_flags & NFS4_ACL_TRUNC) {
3937 /* Did the user only issue a request for the acl length? */
3943 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3945 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3949 for (i = 0; i < npages; i++)
3951 __free_page(pages[i]);
3952 if (res.acl_scratch)
3953 __free_page(res.acl_scratch);
3957 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3959 struct nfs4_exception exception = { };
3962 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3965 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3966 } while (exception.retry);
3970 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3972 struct nfs_server *server = NFS_SERVER(inode);
3975 if (!nfs4_server_supports_acls(server))
3977 ret = nfs_revalidate_inode(server, inode);
3980 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3981 nfs_zap_acl_cache(inode);
3982 ret = nfs4_read_cached_acl(inode, buf, buflen);
3984 /* -ENOENT is returned if there is no ACL or if there is an ACL
3985 * but no cached acl data, just the acl length */
3987 return nfs4_get_acl_uncached(inode, buf, buflen);
3990 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3992 struct nfs_server *server = NFS_SERVER(inode);
3993 struct page *pages[NFS4ACL_MAXPAGES];
3994 struct nfs_setaclargs arg = {
3995 .fh = NFS_FH(inode),
3999 struct nfs_setaclres res;
4000 struct rpc_message msg = {
4001 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4005 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4008 if (!nfs4_server_supports_acls(server))
4010 if (npages > ARRAY_SIZE(pages))
4012 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4015 nfs4_inode_return_delegation(inode);
4016 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4019 * Free each page after tx, so the only ref left is
4020 * held by the network stack
4023 put_page(pages[i-1]);
4026 * Acl update can result in inode attribute update.
4027 * so mark the attribute cache invalid.
4029 spin_lock(&inode->i_lock);
4030 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4031 spin_unlock(&inode->i_lock);
4032 nfs_access_zap_cache(inode);
4033 nfs_zap_acl_cache(inode);
4037 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4039 struct nfs4_exception exception = { };
4042 err = nfs4_handle_exception(NFS_SERVER(inode),
4043 __nfs4_proc_set_acl(inode, buf, buflen),
4045 } while (exception.retry);
4050 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
4052 struct nfs_client *clp = server->nfs_client;
4054 if (task->tk_status >= 0)
4056 switch(task->tk_status) {
4057 case -NFS4ERR_DELEG_REVOKED:
4058 case -NFS4ERR_ADMIN_REVOKED:
4059 case -NFS4ERR_BAD_STATEID:
4062 nfs_remove_bad_delegation(state->inode);
4063 case -NFS4ERR_OPENMODE:
4066 nfs4_schedule_stateid_recovery(server, state);
4067 goto wait_on_recovery;
4068 case -NFS4ERR_EXPIRED:
4070 nfs4_schedule_stateid_recovery(server, state);
4071 case -NFS4ERR_STALE_STATEID:
4072 case -NFS4ERR_STALE_CLIENTID:
4073 nfs4_schedule_lease_recovery(clp);
4074 goto wait_on_recovery;
4075 #if defined(CONFIG_NFS_V4_1)
4076 case -NFS4ERR_BADSESSION:
4077 case -NFS4ERR_BADSLOT:
4078 case -NFS4ERR_BAD_HIGH_SLOT:
4079 case -NFS4ERR_DEADSESSION:
4080 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4081 case -NFS4ERR_SEQ_FALSE_RETRY:
4082 case -NFS4ERR_SEQ_MISORDERED:
4083 dprintk("%s ERROR %d, Reset session\n", __func__,
4085 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4086 task->tk_status = 0;
4088 #endif /* CONFIG_NFS_V4_1 */
4089 case -NFS4ERR_DELAY:
4090 nfs_inc_server_stats(server, NFSIOS_DELAY);
4091 case -NFS4ERR_GRACE:
4093 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4094 task->tk_status = 0;
4096 case -NFS4ERR_RETRY_UNCACHED_REP:
4097 case -NFS4ERR_OLD_STATEID:
4098 task->tk_status = 0;
4101 task->tk_status = nfs4_map_errors(task->tk_status);
4104 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4105 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4106 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4107 task->tk_status = 0;
4111 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4112 nfs4_verifier *bootverf)
4116 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4117 /* An impossible timestamp guarantees this value
4118 * will never match a generated boot time. */
4120 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4122 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4123 verf[0] = (__be32)nn->boot_time.tv_sec;
4124 verf[1] = (__be32)nn->boot_time.tv_nsec;
4126 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4130 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4131 char *buf, size_t len)
4133 unsigned int result;
4136 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4138 rpc_peeraddr2str(clp->cl_rpcclient,
4140 rpc_peeraddr2str(clp->cl_rpcclient,
4141 RPC_DISPLAY_PROTO));
4147 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4148 char *buf, size_t len)
4150 char *nodename = clp->cl_rpcclient->cl_nodename;
4152 if (nfs4_client_id_uniquifier[0] != '\0')
4153 nodename = nfs4_client_id_uniquifier;
4154 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4155 clp->rpc_ops->version, clp->cl_minorversion,
4160 * nfs4_proc_setclientid - Negotiate client ID
4161 * @clp: state data structure
4162 * @program: RPC program for NFSv4 callback service
4163 * @port: IP port number for NFS4 callback service
4164 * @cred: RPC credential to use for this call
4165 * @res: where to place the result
4167 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4169 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4170 unsigned short port, struct rpc_cred *cred,
4171 struct nfs4_setclientid_res *res)
4173 nfs4_verifier sc_verifier;
4174 struct nfs4_setclientid setclientid = {
4175 .sc_verifier = &sc_verifier,
4177 .sc_cb_ident = clp->cl_cb_ident,
4179 struct rpc_message msg = {
4180 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4181 .rpc_argp = &setclientid,
4187 /* nfs_client_id4 */
4188 nfs4_init_boot_verifier(clp, &sc_verifier);
4189 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4190 setclientid.sc_name_len =
4191 nfs4_init_uniform_client_string(clp,
4192 setclientid.sc_name,
4193 sizeof(setclientid.sc_name));
4195 setclientid.sc_name_len =
4196 nfs4_init_nonuniform_client_string(clp,
4197 setclientid.sc_name,
4198 sizeof(setclientid.sc_name));
4201 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4202 sizeof(setclientid.sc_netid),
4203 rpc_peeraddr2str(clp->cl_rpcclient,
4204 RPC_DISPLAY_NETID));
4206 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4207 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4208 clp->cl_ipaddr, port >> 8, port & 255);
4210 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4211 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4212 setclientid.sc_name_len, setclientid.sc_name);
4213 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4214 dprintk("NFS reply setclientid: %d\n", status);
4219 * nfs4_proc_setclientid_confirm - Confirm client ID
4220 * @clp: state data structure
4221 * @res: result of a previous SETCLIENTID
4222 * @cred: RPC credential to use for this call
4224 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4226 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4227 struct nfs4_setclientid_res *arg,
4228 struct rpc_cred *cred)
4230 struct nfs_fsinfo fsinfo;
4231 struct rpc_message msg = {
4232 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4234 .rpc_resp = &fsinfo,
4240 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4241 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4244 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4246 spin_lock(&clp->cl_lock);
4247 clp->cl_lease_time = fsinfo.lease_time * HZ;
4248 clp->cl_last_renewal = now;
4249 spin_unlock(&clp->cl_lock);
4251 dprintk("NFS reply setclientid_confirm: %d\n", status);
4255 struct nfs4_delegreturndata {
4256 struct nfs4_delegreturnargs args;
4257 struct nfs4_delegreturnres res;
4259 nfs4_stateid stateid;
4260 unsigned long timestamp;
4261 struct nfs_fattr fattr;
4265 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4267 struct nfs4_delegreturndata *data = calldata;
4269 if (!nfs4_sequence_done(task, &data->res.seq_res))
4272 switch (task->tk_status) {
4273 case -NFS4ERR_STALE_STATEID:
4274 case -NFS4ERR_EXPIRED:
4276 renew_lease(data->res.server, data->timestamp);
4279 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4281 rpc_restart_call_prepare(task);
4285 data->rpc_status = task->tk_status;
4288 static void nfs4_delegreturn_release(void *calldata)
4293 #if defined(CONFIG_NFS_V4_1)
4294 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4296 struct nfs4_delegreturndata *d_data;
4298 d_data = (struct nfs4_delegreturndata *)data;
4300 if (nfs4_setup_sequence(d_data->res.server,
4301 &d_data->args.seq_args,
4302 &d_data->res.seq_res, task))
4304 rpc_call_start(task);
4306 #endif /* CONFIG_NFS_V4_1 */
4308 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4309 #if defined(CONFIG_NFS_V4_1)
4310 .rpc_call_prepare = nfs4_delegreturn_prepare,
4311 #endif /* CONFIG_NFS_V4_1 */
4312 .rpc_call_done = nfs4_delegreturn_done,
4313 .rpc_release = nfs4_delegreturn_release,
4316 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4318 struct nfs4_delegreturndata *data;
4319 struct nfs_server *server = NFS_SERVER(inode);
4320 struct rpc_task *task;
4321 struct rpc_message msg = {
4322 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4325 struct rpc_task_setup task_setup_data = {
4326 .rpc_client = server->client,
4327 .rpc_message = &msg,
4328 .callback_ops = &nfs4_delegreturn_ops,
4329 .flags = RPC_TASK_ASYNC,
4333 data = kzalloc(sizeof(*data), GFP_NOFS);
4336 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4337 data->args.fhandle = &data->fh;
4338 data->args.stateid = &data->stateid;
4339 data->args.bitmask = server->cache_consistency_bitmask;
4340 nfs_copy_fh(&data->fh, NFS_FH(inode));
4341 nfs4_stateid_copy(&data->stateid, stateid);
4342 data->res.fattr = &data->fattr;
4343 data->res.server = server;
4344 nfs_fattr_init(data->res.fattr);
4345 data->timestamp = jiffies;
4346 data->rpc_status = 0;
4348 task_setup_data.callback_data = data;
4349 msg.rpc_argp = &data->args;
4350 msg.rpc_resp = &data->res;
4351 task = rpc_run_task(&task_setup_data);
4353 return PTR_ERR(task);
4356 status = nfs4_wait_for_completion_rpc_task(task);
4359 status = data->rpc_status;
4361 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4363 nfs_refresh_inode(inode, &data->fattr);
4369 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4371 struct nfs_server *server = NFS_SERVER(inode);
4372 struct nfs4_exception exception = { };
4375 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4377 case -NFS4ERR_STALE_STATEID:
4378 case -NFS4ERR_EXPIRED:
4382 err = nfs4_handle_exception(server, err, &exception);
4383 } while (exception.retry);
4387 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4388 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4391 * sleep, with exponential backoff, and retry the LOCK operation.
4393 static unsigned long
4394 nfs4_set_lock_task_retry(unsigned long timeout)
4396 freezable_schedule_timeout_killable(timeout);
4398 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4399 return NFS4_LOCK_MAXTIMEOUT;
4403 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4405 struct inode *inode = state->inode;
4406 struct nfs_server *server = NFS_SERVER(inode);
4407 struct nfs_client *clp = server->nfs_client;
4408 struct nfs_lockt_args arg = {
4409 .fh = NFS_FH(inode),
4412 struct nfs_lockt_res res = {
4415 struct rpc_message msg = {
4416 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4419 .rpc_cred = state->owner->so_cred,
4421 struct nfs4_lock_state *lsp;
4424 arg.lock_owner.clientid = clp->cl_clientid;
4425 status = nfs4_set_lock_state(state, request);
4428 lsp = request->fl_u.nfs4_fl.owner;
4429 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4430 arg.lock_owner.s_dev = server->s_dev;
4431 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4434 request->fl_type = F_UNLCK;
4436 case -NFS4ERR_DENIED:
4439 request->fl_ops->fl_release_private(request);
4444 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4446 struct nfs4_exception exception = { };
4450 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4451 _nfs4_proc_getlk(state, cmd, request),
4453 } while (exception.retry);
4457 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4460 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4462 res = posix_lock_file_wait(file, fl);
4465 res = flock_lock_file_wait(file, fl);
4473 struct nfs4_unlockdata {
4474 struct nfs_locku_args arg;
4475 struct nfs_locku_res res;
4476 struct nfs4_lock_state *lsp;
4477 struct nfs_open_context *ctx;
4478 struct file_lock fl;
4479 const struct nfs_server *server;
4480 unsigned long timestamp;
4483 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4484 struct nfs_open_context *ctx,
4485 struct nfs4_lock_state *lsp,
4486 struct nfs_seqid *seqid)
4488 struct nfs4_unlockdata *p;
4489 struct inode *inode = lsp->ls_state->inode;
4491 p = kzalloc(sizeof(*p), GFP_NOFS);
4494 p->arg.fh = NFS_FH(inode);
4496 p->arg.seqid = seqid;
4497 p->res.seqid = seqid;
4498 p->arg.stateid = &lsp->ls_stateid;
4500 atomic_inc(&lsp->ls_count);
4501 /* Ensure we don't close file until we're done freeing locks! */
4502 p->ctx = get_nfs_open_context(ctx);
4503 memcpy(&p->fl, fl, sizeof(p->fl));
4504 p->server = NFS_SERVER(inode);
4508 static void nfs4_locku_release_calldata(void *data)
4510 struct nfs4_unlockdata *calldata = data;
4511 nfs_free_seqid(calldata->arg.seqid);
4512 nfs4_put_lock_state(calldata->lsp);
4513 put_nfs_open_context(calldata->ctx);
4517 static void nfs4_locku_done(struct rpc_task *task, void *data)
4519 struct nfs4_unlockdata *calldata = data;
4521 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4523 switch (task->tk_status) {
4525 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4526 &calldata->res.stateid);
4527 renew_lease(calldata->server, calldata->timestamp);
4529 case -NFS4ERR_BAD_STATEID:
4530 case -NFS4ERR_OLD_STATEID:
4531 case -NFS4ERR_STALE_STATEID:
4532 case -NFS4ERR_EXPIRED:
4535 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4536 rpc_restart_call_prepare(task);
4538 nfs_release_seqid(calldata->arg.seqid);
4541 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4543 struct nfs4_unlockdata *calldata = data;
4545 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4547 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
4548 /* Note: exit _without_ running nfs4_locku_done */
4549 task->tk_action = NULL;
4552 calldata->timestamp = jiffies;
4553 if (nfs4_setup_sequence(calldata->server,
4554 &calldata->arg.seq_args,
4555 &calldata->res.seq_res,
4557 nfs_release_seqid(calldata->arg.seqid);
4559 rpc_call_start(task);
4562 static const struct rpc_call_ops nfs4_locku_ops = {
4563 .rpc_call_prepare = nfs4_locku_prepare,
4564 .rpc_call_done = nfs4_locku_done,
4565 .rpc_release = nfs4_locku_release_calldata,
4568 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4569 struct nfs_open_context *ctx,
4570 struct nfs4_lock_state *lsp,
4571 struct nfs_seqid *seqid)
4573 struct nfs4_unlockdata *data;
4574 struct rpc_message msg = {
4575 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4576 .rpc_cred = ctx->cred,
4578 struct rpc_task_setup task_setup_data = {
4579 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4580 .rpc_message = &msg,
4581 .callback_ops = &nfs4_locku_ops,
4582 .workqueue = nfsiod_workqueue,
4583 .flags = RPC_TASK_ASYNC,
4586 /* Ensure this is an unlock - when canceling a lock, the
4587 * canceled lock is passed in, and it won't be an unlock.
4589 fl->fl_type = F_UNLCK;
4591 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4593 nfs_free_seqid(seqid);
4594 return ERR_PTR(-ENOMEM);
4597 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4598 msg.rpc_argp = &data->arg;
4599 msg.rpc_resp = &data->res;
4600 task_setup_data.callback_data = data;
4601 return rpc_run_task(&task_setup_data);
4604 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4606 struct nfs_inode *nfsi = NFS_I(state->inode);
4607 struct nfs_seqid *seqid;
4608 struct nfs4_lock_state *lsp;
4609 struct rpc_task *task;
4611 unsigned char fl_flags = request->fl_flags;
4613 status = nfs4_set_lock_state(state, request);
4614 /* Unlock _before_ we do the RPC call */
4615 request->fl_flags |= FL_EXISTS;
4616 down_read(&nfsi->rwsem);
4617 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4618 up_read(&nfsi->rwsem);
4621 up_read(&nfsi->rwsem);
4624 /* Is this a delegated lock? */
4625 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4627 lsp = request->fl_u.nfs4_fl.owner;
4628 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4632 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4633 status = PTR_ERR(task);
4636 status = nfs4_wait_for_completion_rpc_task(task);
4639 request->fl_flags = fl_flags;
4643 struct nfs4_lockdata {
4644 struct nfs_lock_args arg;
4645 struct nfs_lock_res res;
4646 struct nfs4_lock_state *lsp;
4647 struct nfs_open_context *ctx;
4648 struct file_lock fl;
4649 unsigned long timestamp;
4652 struct nfs_server *server;
4655 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4656 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4659 struct nfs4_lockdata *p;
4660 struct inode *inode = lsp->ls_state->inode;
4661 struct nfs_server *server = NFS_SERVER(inode);
4663 p = kzalloc(sizeof(*p), gfp_mask);
4667 p->arg.fh = NFS_FH(inode);
4669 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4670 if (p->arg.open_seqid == NULL)
4672 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4673 if (p->arg.lock_seqid == NULL)
4674 goto out_free_seqid;
4675 p->arg.lock_stateid = &lsp->ls_stateid;
4676 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4677 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4678 p->arg.lock_owner.s_dev = server->s_dev;
4679 p->res.lock_seqid = p->arg.lock_seqid;
4682 atomic_inc(&lsp->ls_count);
4683 p->ctx = get_nfs_open_context(ctx);
4684 memcpy(&p->fl, fl, sizeof(p->fl));
4687 nfs_free_seqid(p->arg.open_seqid);
4693 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4695 struct nfs4_lockdata *data = calldata;
4696 struct nfs4_state *state = data->lsp->ls_state;
4698 dprintk("%s: begin!\n", __func__);
4699 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4701 /* Do we need to do an open_to_lock_owner? */
4702 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4703 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4704 goto out_release_lock_seqid;
4705 data->arg.open_stateid = &state->stateid;
4706 data->arg.new_lock_owner = 1;
4707 data->res.open_seqid = data->arg.open_seqid;
4709 data->arg.new_lock_owner = 0;
4710 data->timestamp = jiffies;
4711 if (nfs4_setup_sequence(data->server,
4712 &data->arg.seq_args,
4715 rpc_call_start(task);
4718 nfs_release_seqid(data->arg.open_seqid);
4719 out_release_lock_seqid:
4720 nfs_release_seqid(data->arg.lock_seqid);
4721 dprintk("%s: done!, ret = %d\n", __func__, task->tk_status);
4724 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4726 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4727 nfs4_lock_prepare(task, calldata);
4730 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4732 struct nfs4_lockdata *data = calldata;
4734 dprintk("%s: begin!\n", __func__);
4736 if (!nfs4_sequence_done(task, &data->res.seq_res))
4739 data->rpc_status = task->tk_status;
4740 if (data->arg.new_lock_owner != 0) {
4741 if (data->rpc_status == 0)
4742 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4746 if (data->rpc_status == 0) {
4747 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4748 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
4749 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4752 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4755 static void nfs4_lock_release(void *calldata)
4757 struct nfs4_lockdata *data = calldata;
4759 dprintk("%s: begin!\n", __func__);
4760 nfs_free_seqid(data->arg.open_seqid);
4761 if (data->cancelled != 0) {
4762 struct rpc_task *task;
4763 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4764 data->arg.lock_seqid);
4766 rpc_put_task_async(task);
4767 dprintk("%s: cancelling lock!\n", __func__);
4769 nfs_free_seqid(data->arg.lock_seqid);
4770 nfs4_put_lock_state(data->lsp);
4771 put_nfs_open_context(data->ctx);
4773 dprintk("%s: done!\n", __func__);
4776 static const struct rpc_call_ops nfs4_lock_ops = {
4777 .rpc_call_prepare = nfs4_lock_prepare,
4778 .rpc_call_done = nfs4_lock_done,
4779 .rpc_release = nfs4_lock_release,
4782 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4783 .rpc_call_prepare = nfs4_recover_lock_prepare,
4784 .rpc_call_done = nfs4_lock_done,
4785 .rpc_release = nfs4_lock_release,
4788 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4791 case -NFS4ERR_ADMIN_REVOKED:
4792 case -NFS4ERR_BAD_STATEID:
4793 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4794 if (new_lock_owner != 0 ||
4795 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
4796 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4798 case -NFS4ERR_STALE_STATEID:
4799 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4800 case -NFS4ERR_EXPIRED:
4801 nfs4_schedule_lease_recovery(server->nfs_client);
4805 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4807 struct nfs4_lockdata *data;
4808 struct rpc_task *task;
4809 struct rpc_message msg = {
4810 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4811 .rpc_cred = state->owner->so_cred,
4813 struct rpc_task_setup task_setup_data = {
4814 .rpc_client = NFS_CLIENT(state->inode),
4815 .rpc_message = &msg,
4816 .callback_ops = &nfs4_lock_ops,
4817 .workqueue = nfsiod_workqueue,
4818 .flags = RPC_TASK_ASYNC,
4822 dprintk("%s: begin!\n", __func__);
4823 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4824 fl->fl_u.nfs4_fl.owner,
4825 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4829 data->arg.block = 1;
4830 if (recovery_type > NFS_LOCK_NEW) {
4831 if (recovery_type == NFS_LOCK_RECLAIM)
4832 data->arg.reclaim = NFS_LOCK_RECLAIM;
4833 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4835 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4836 msg.rpc_argp = &data->arg;
4837 msg.rpc_resp = &data->res;
4838 task_setup_data.callback_data = data;
4839 task = rpc_run_task(&task_setup_data);
4841 return PTR_ERR(task);
4842 ret = nfs4_wait_for_completion_rpc_task(task);
4844 ret = data->rpc_status;
4846 nfs4_handle_setlk_error(data->server, data->lsp,
4847 data->arg.new_lock_owner, ret);
4849 data->cancelled = 1;
4851 dprintk("%s: done, ret = %d!\n", __func__, ret);
4855 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4857 struct nfs_server *server = NFS_SERVER(state->inode);
4858 struct nfs4_exception exception = {
4859 .inode = state->inode,
4864 /* Cache the lock if possible... */
4865 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4867 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4868 if (err != -NFS4ERR_DELAY)
4870 nfs4_handle_exception(server, err, &exception);
4871 } while (exception.retry);
4875 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4877 struct nfs_server *server = NFS_SERVER(state->inode);
4878 struct nfs4_exception exception = {
4879 .inode = state->inode,
4883 err = nfs4_set_lock_state(state, request);
4887 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4889 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4893 case -NFS4ERR_GRACE:
4894 case -NFS4ERR_DELAY:
4895 nfs4_handle_exception(server, err, &exception);
4898 } while (exception.retry);
4903 #if defined(CONFIG_NFS_V4_1)
4905 * nfs41_check_expired_locks - possibly free a lock stateid
4907 * @state: NFSv4 state for an inode
4909 * Returns NFS_OK if recovery for this stateid is now finished.
4910 * Otherwise a negative NFS4ERR value is returned.
4912 static int nfs41_check_expired_locks(struct nfs4_state *state)
4914 int status, ret = -NFS4ERR_BAD_STATEID;
4915 struct nfs4_lock_state *lsp;
4916 struct nfs_server *server = NFS_SERVER(state->inode);
4918 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4919 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
4920 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4921 if (status != NFS_OK) {
4922 /* Free the stateid unless the server
4923 * informs us the stateid is unrecognized. */
4924 if (status != -NFS4ERR_BAD_STATEID)
4925 nfs41_free_stateid(server,
4927 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
4936 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4938 int status = NFS_OK;
4940 if (test_bit(LK_STATE_IN_USE, &state->flags))
4941 status = nfs41_check_expired_locks(state);
4942 if (status != NFS_OK)
4943 status = nfs4_lock_expired(state, request);
4948 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4950 struct nfs_inode *nfsi = NFS_I(state->inode);
4951 unsigned char fl_flags = request->fl_flags;
4952 int status = -ENOLCK;
4954 if ((fl_flags & FL_POSIX) &&
4955 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4957 /* Is this a delegated open? */
4958 status = nfs4_set_lock_state(state, request);
4961 request->fl_flags |= FL_ACCESS;
4962 status = do_vfs_lock(request->fl_file, request);
4965 down_read(&nfsi->rwsem);
4966 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4967 /* Yes: cache locks! */
4968 /* ...but avoid races with delegation recall... */
4969 request->fl_flags = fl_flags & ~FL_SLEEP;
4970 status = do_vfs_lock(request->fl_file, request);
4973 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4976 /* Note: we always want to sleep here! */
4977 request->fl_flags = fl_flags | FL_SLEEP;
4978 if (do_vfs_lock(request->fl_file, request) < 0)
4979 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4980 "manager!\n", __func__);
4982 up_read(&nfsi->rwsem);
4984 request->fl_flags = fl_flags;
4988 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4990 struct nfs4_exception exception = {
4992 .inode = state->inode,
4997 err = _nfs4_proc_setlk(state, cmd, request);
4998 if (err == -NFS4ERR_DENIED)
5000 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5002 } while (exception.retry);
5007 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5009 struct nfs_open_context *ctx;
5010 struct nfs4_state *state;
5011 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5014 /* verify open state */
5015 ctx = nfs_file_open_context(filp);
5018 if (request->fl_start < 0 || request->fl_end < 0)
5021 if (IS_GETLK(cmd)) {
5023 return nfs4_proc_getlk(state, F_GETLK, request);
5027 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5030 if (request->fl_type == F_UNLCK) {
5032 return nfs4_proc_unlck(state, cmd, request);
5039 * Don't rely on the VFS having checked the file open mode,
5040 * since it won't do this for flock() locks.
5042 switch (request->fl_type) {
5044 if (!(filp->f_mode & FMODE_READ))
5048 if (!(filp->f_mode & FMODE_WRITE))
5053 status = nfs4_proc_setlk(state, cmd, request);
5054 if ((status != -EAGAIN) || IS_SETLK(cmd))
5056 timeout = nfs4_set_lock_task_retry(timeout);
5057 status = -ERESTARTSYS;
5060 } while(status < 0);
5064 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
5066 struct nfs_server *server = NFS_SERVER(state->inode);
5067 struct nfs4_exception exception = { };
5070 err = nfs4_set_lock_state(state, fl);
5074 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5077 printk(KERN_ERR "NFS: %s: unhandled error "
5078 "%d.\n", __func__, err);
5082 case -NFS4ERR_EXPIRED:
5083 nfs4_schedule_stateid_recovery(server, state);
5084 case -NFS4ERR_STALE_CLIENTID:
5085 case -NFS4ERR_STALE_STATEID:
5086 nfs4_schedule_lease_recovery(server->nfs_client);
5088 case -NFS4ERR_BADSESSION:
5089 case -NFS4ERR_BADSLOT:
5090 case -NFS4ERR_BAD_HIGH_SLOT:
5091 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5092 case -NFS4ERR_DEADSESSION:
5093 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
5097 * The show must go on: exit, but mark the
5098 * stateid as needing recovery.
5100 case -NFS4ERR_DELEG_REVOKED:
5101 case -NFS4ERR_ADMIN_REVOKED:
5102 case -NFS4ERR_BAD_STATEID:
5103 case -NFS4ERR_OPENMODE:
5104 nfs4_schedule_stateid_recovery(server, state);
5109 * User RPCSEC_GSS context has expired.
5110 * We cannot recover this stateid now, so
5111 * skip it and allow recovery thread to
5117 case -NFS4ERR_DENIED:
5118 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5121 case -NFS4ERR_DELAY:
5124 err = nfs4_handle_exception(server, err, &exception);
5125 } while (exception.retry);
5130 struct nfs_release_lockowner_data {
5131 struct nfs4_lock_state *lsp;
5132 struct nfs_server *server;
5133 struct nfs_release_lockowner_args args;
5136 static void nfs4_release_lockowner_release(void *calldata)
5138 struct nfs_release_lockowner_data *data = calldata;
5139 nfs4_free_lock_state(data->server, data->lsp);
5143 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5144 .rpc_release = nfs4_release_lockowner_release,
5147 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
5149 struct nfs_server *server = lsp->ls_state->owner->so_server;
5150 struct nfs_release_lockowner_data *data;
5151 struct rpc_message msg = {
5152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5155 if (server->nfs_client->cl_mvops->minor_version != 0)
5157 data = kmalloc(sizeof(*data), GFP_NOFS);
5161 data->server = server;
5162 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5163 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5164 data->args.lock_owner.s_dev = server->s_dev;
5165 msg.rpc_argp = &data->args;
5166 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5170 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5172 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5173 const void *buf, size_t buflen,
5174 int flags, int type)
5176 if (strcmp(key, "") != 0)
5179 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5182 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5183 void *buf, size_t buflen, int type)
5185 if (strcmp(key, "") != 0)
5188 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5191 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5192 size_t list_len, const char *name,
5193 size_t name_len, int type)
5195 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5197 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5200 if (list && len <= list_len)
5201 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5206 * nfs_fhget will use either the mounted_on_fileid or the fileid
5208 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5210 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5211 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5212 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5213 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5216 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5217 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5218 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5222 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5223 const struct qstr *name,
5224 struct nfs4_fs_locations *fs_locations,
5227 struct nfs_server *server = NFS_SERVER(dir);
5229 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5231 struct nfs4_fs_locations_arg args = {
5232 .dir_fh = NFS_FH(dir),
5237 struct nfs4_fs_locations_res res = {
5238 .fs_locations = fs_locations,
5240 struct rpc_message msg = {
5241 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5247 dprintk("%s: start\n", __func__);
5249 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5250 * is not supported */
5251 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5252 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5254 bitmask[0] |= FATTR4_WORD0_FILEID;
5256 nfs_fattr_init(&fs_locations->fattr);
5257 fs_locations->server = server;
5258 fs_locations->nlocations = 0;
5259 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5260 dprintk("%s: returned status = %d\n", __func__, status);
5264 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5265 const struct qstr *name,
5266 struct nfs4_fs_locations *fs_locations,
5269 struct nfs4_exception exception = { };
5272 err = nfs4_handle_exception(NFS_SERVER(dir),
5273 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5275 } while (exception.retry);
5279 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5282 struct nfs4_secinfo_arg args = {
5283 .dir_fh = NFS_FH(dir),
5286 struct nfs4_secinfo_res res = {
5289 struct rpc_message msg = {
5290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5295 dprintk("NFS call secinfo %s\n", name->name);
5296 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5297 dprintk("NFS reply secinfo: %d\n", status);
5301 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5302 struct nfs4_secinfo_flavors *flavors)
5304 struct nfs4_exception exception = { };
5307 err = nfs4_handle_exception(NFS_SERVER(dir),
5308 _nfs4_proc_secinfo(dir, name, flavors),
5310 } while (exception.retry);
5314 #ifdef CONFIG_NFS_V4_1
5316 * Check the exchange flags returned by the server for invalid flags, having
5317 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5320 static int nfs4_check_cl_exchange_flags(u32 flags)
5322 if (flags & ~EXCHGID4_FLAG_MASK_R)
5324 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5325 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5327 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5331 return -NFS4ERR_INVAL;
5335 nfs41_same_server_scope(struct nfs41_server_scope *a,
5336 struct nfs41_server_scope *b)
5338 if (a->server_scope_sz == b->server_scope_sz &&
5339 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5346 * nfs4_proc_bind_conn_to_session()
5348 * The 4.1 client currently uses the same TCP connection for the
5349 * fore and backchannel.
5351 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5354 struct nfs41_bind_conn_to_session_res res;
5355 struct rpc_message msg = {
5357 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5363 dprintk("--> %s\n", __func__);
5365 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5366 if (unlikely(res.session == NULL)) {
5371 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5373 if (memcmp(res.session->sess_id.data,
5374 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5375 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5379 if (res.dir != NFS4_CDFS4_BOTH) {
5380 dprintk("NFS: %s: Unexpected direction from server\n",
5385 if (res.use_conn_in_rdma_mode) {
5386 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5395 dprintk("<-- %s status= %d\n", __func__, status);
5400 * nfs4_proc_exchange_id()
5402 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5404 * Since the clientid has expired, all compounds using sessions
5405 * associated with the stale clientid will be returning
5406 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5407 * be in some phase of session reset.
5409 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5411 nfs4_verifier verifier;
5412 struct nfs41_exchange_id_args args = {
5413 .verifier = &verifier,
5415 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5417 struct nfs41_exchange_id_res res = {
5421 struct rpc_message msg = {
5422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5428 nfs4_init_boot_verifier(clp, &verifier);
5429 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5431 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5432 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5433 args.id_len, args.id);
5435 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5437 if (unlikely(res.server_owner == NULL)) {
5442 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5444 if (unlikely(res.server_scope == NULL)) {
5446 goto out_server_owner;
5449 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5450 if (unlikely(res.impl_id == NULL)) {
5452 goto out_server_scope;
5455 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5457 status = nfs4_check_cl_exchange_flags(res.flags);
5460 clp->cl_clientid = res.clientid;
5461 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5462 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5463 clp->cl_seqid = res.seqid;
5465 kfree(clp->cl_serverowner);
5466 clp->cl_serverowner = res.server_owner;
5467 res.server_owner = NULL;
5469 /* use the most recent implementation id */
5470 kfree(clp->cl_implid);
5471 clp->cl_implid = res.impl_id;
5473 if (clp->cl_serverscope != NULL &&
5474 !nfs41_same_server_scope(clp->cl_serverscope,
5475 res.server_scope)) {
5476 dprintk("%s: server_scope mismatch detected\n",
5478 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5479 kfree(clp->cl_serverscope);
5480 clp->cl_serverscope = NULL;
5483 if (clp->cl_serverscope == NULL) {
5484 clp->cl_serverscope = res.server_scope;
5491 kfree(res.server_owner);
5493 kfree(res.server_scope);
5495 if (clp->cl_implid != NULL)
5496 dprintk("NFS reply exchange_id: Server Implementation ID: "
5497 "domain: %s, name: %s, date: %llu,%u\n",
5498 clp->cl_implid->domain, clp->cl_implid->name,
5499 clp->cl_implid->date.seconds,
5500 clp->cl_implid->date.nseconds);
5501 dprintk("NFS reply exchange_id: %d\n", status);
5505 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5506 struct rpc_cred *cred)
5508 struct rpc_message msg = {
5509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5515 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5517 dprintk("NFS: Got error %d from the server %s on "
5518 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5522 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5523 struct rpc_cred *cred)
5528 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5529 ret = _nfs4_proc_destroy_clientid(clp, cred);
5531 case -NFS4ERR_DELAY:
5532 case -NFS4ERR_CLIENTID_BUSY:
5542 int nfs4_destroy_clientid(struct nfs_client *clp)
5544 struct rpc_cred *cred;
5547 if (clp->cl_mvops->minor_version < 1)
5549 if (clp->cl_exchange_flags == 0)
5551 if (clp->cl_preserve_clid)
5553 cred = nfs4_get_exchange_id_cred(clp);
5554 ret = nfs4_proc_destroy_clientid(clp, cred);
5559 case -NFS4ERR_STALE_CLIENTID:
5560 clp->cl_exchange_flags = 0;
5566 struct nfs4_get_lease_time_data {
5567 struct nfs4_get_lease_time_args *args;
5568 struct nfs4_get_lease_time_res *res;
5569 struct nfs_client *clp;
5572 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5576 struct nfs4_get_lease_time_data *data =
5577 (struct nfs4_get_lease_time_data *)calldata;
5579 dprintk("--> %s\n", __func__);
5580 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5581 /* just setup sequence, do not trigger session recovery
5582 since we're invoked within one */
5583 ret = nfs41_setup_sequence(data->clp->cl_session,
5584 &data->args->la_seq_args,
5585 &data->res->lr_seq_res, task);
5588 rpc_call_start(task);
5589 dprintk("<-- %s\n", __func__);
5593 * Called from nfs4_state_manager thread for session setup, so don't recover
5594 * from sequence operation or clientid errors.
5596 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5598 struct nfs4_get_lease_time_data *data =
5599 (struct nfs4_get_lease_time_data *)calldata;
5601 dprintk("--> %s\n", __func__);
5602 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5604 switch (task->tk_status) {
5605 case -NFS4ERR_DELAY:
5606 case -NFS4ERR_GRACE:
5607 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5608 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5609 task->tk_status = 0;
5611 case -NFS4ERR_RETRY_UNCACHED_REP:
5612 rpc_restart_call_prepare(task);
5615 dprintk("<-- %s\n", __func__);
5618 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5619 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5620 .rpc_call_done = nfs4_get_lease_time_done,
5623 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5625 struct rpc_task *task;
5626 struct nfs4_get_lease_time_args args;
5627 struct nfs4_get_lease_time_res res = {
5628 .lr_fsinfo = fsinfo,
5630 struct nfs4_get_lease_time_data data = {
5635 struct rpc_message msg = {
5636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5640 struct rpc_task_setup task_setup = {
5641 .rpc_client = clp->cl_rpcclient,
5642 .rpc_message = &msg,
5643 .callback_ops = &nfs4_get_lease_time_ops,
5644 .callback_data = &data,
5645 .flags = RPC_TASK_TIMEOUT,
5649 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5650 dprintk("--> %s\n", __func__);
5651 task = rpc_run_task(&task_setup);
5654 status = PTR_ERR(task);
5656 status = task->tk_status;
5659 dprintk("<-- %s return %d\n", __func__, status);
5664 struct nfs4_slot *nfs4_alloc_slots(struct nfs4_slot_table *table,
5665 u32 max_slots, gfp_t gfp_flags)
5667 struct nfs4_slot *tbl;
5670 tbl = kmalloc_array(max_slots, sizeof(*tbl), gfp_flags);
5672 for (i = 0; i < max_slots; i++)
5673 tbl[i].table = table;
5678 static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5679 struct nfs4_slot *new,
5683 struct nfs4_slot *old = NULL;
5686 spin_lock(&tbl->slot_tbl_lock);
5690 tbl->max_slots = max_slots;
5692 tbl->highest_used_slotid = NFS4_NO_SLOT;
5693 for (i = 0; i < tbl->max_slots; i++)
5694 tbl->slots[i].seq_nr = ivalue;
5695 spin_unlock(&tbl->slot_tbl_lock);
5700 * (re)Initialise a slot table
5702 static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5705 struct nfs4_slot *new = NULL;
5708 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5709 max_reqs, tbl->max_slots);
5711 /* Does the newly negotiated max_reqs match the existing slot table? */
5712 if (max_reqs != tbl->max_slots) {
5713 new = nfs4_alloc_slots(tbl, max_reqs, GFP_NOFS);
5719 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
5720 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5721 tbl, tbl->slots, tbl->max_slots);
5723 dprintk("<-- %s: return %d\n", __func__, ret);
5727 /* Destroy the slot table */
5728 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5730 if (session->fc_slot_table.slots != NULL) {
5731 kfree(session->fc_slot_table.slots);
5732 session->fc_slot_table.slots = NULL;
5734 if (session->bc_slot_table.slots != NULL) {
5735 kfree(session->bc_slot_table.slots);
5736 session->bc_slot_table.slots = NULL;
5742 * Initialize or reset the forechannel and backchannel tables
5744 static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5746 struct nfs4_slot_table *tbl;
5749 dprintk("--> %s\n", __func__);
5751 tbl = &ses->fc_slot_table;
5753 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5754 if (status) /* -ENOMEM */
5757 tbl = &ses->bc_slot_table;
5759 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5760 if (status && tbl->slots == NULL)
5761 /* Fore and back channel share a connection so get
5762 * both slot tables or neither */
5763 nfs4_destroy_slot_tables(ses);
5767 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5769 struct nfs4_session *session;
5770 struct nfs4_slot_table *tbl;
5772 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5776 tbl = &session->fc_slot_table;
5777 tbl->highest_used_slotid = NFS4_NO_SLOT;
5778 spin_lock_init(&tbl->slot_tbl_lock);
5779 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5780 init_completion(&tbl->complete);
5782 tbl = &session->bc_slot_table;
5783 tbl->highest_used_slotid = NFS4_NO_SLOT;
5784 spin_lock_init(&tbl->slot_tbl_lock);
5785 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5786 init_completion(&tbl->complete);
5788 session->session_state = 1<<NFS4_SESSION_INITING;
5794 void nfs4_destroy_session(struct nfs4_session *session)
5796 struct rpc_xprt *xprt;
5797 struct rpc_cred *cred;
5799 cred = nfs4_get_exchange_id_cred(session->clp);
5800 nfs4_proc_destroy_session(session, cred);
5805 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5807 dprintk("%s Destroy backchannel for xprt %p\n",
5809 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5810 nfs4_destroy_slot_tables(session);
5815 * Initialize the values to be used by the client in CREATE_SESSION
5816 * If nfs4_init_session set the fore channel request and response sizes,
5819 * Set the back channel max_resp_sz_cached to zero to force the client to
5820 * always set csa_cachethis to FALSE because the current implementation
5821 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5823 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5825 struct nfs4_session *session = args->client->cl_session;
5826 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5827 mxresp_sz = session->fc_target_max_resp_sz;
5830 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5832 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5833 /* Fore channel attributes */
5834 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5835 args->fc_attrs.max_resp_sz = mxresp_sz;
5836 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5837 args->fc_attrs.max_reqs = max_session_slots;
5839 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5840 "max_ops=%u max_reqs=%u\n",
5842 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5843 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5845 /* Back channel attributes */
5846 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5847 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5848 args->bc_attrs.max_resp_sz_cached = 0;
5849 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5850 args->bc_attrs.max_reqs = 1;
5852 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5853 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5855 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5856 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5857 args->bc_attrs.max_reqs);
5860 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5862 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5863 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5865 if (rcvd->max_resp_sz > sent->max_resp_sz)
5868 * Our requested max_ops is the minimum we need; we're not
5869 * prepared to break up compounds into smaller pieces than that.
5870 * So, no point even trying to continue if the server won't
5873 if (rcvd->max_ops < sent->max_ops)
5875 if (rcvd->max_reqs == 0)
5877 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5878 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5882 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5884 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5885 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5887 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5889 if (rcvd->max_resp_sz < sent->max_resp_sz)
5891 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5893 /* These would render the backchannel useless: */
5894 if (rcvd->max_ops != sent->max_ops)
5896 if (rcvd->max_reqs != sent->max_reqs)
5901 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5902 struct nfs4_session *session)
5906 ret = nfs4_verify_fore_channel_attrs(args, session);
5909 return nfs4_verify_back_channel_attrs(args, session);
5912 static int _nfs4_proc_create_session(struct nfs_client *clp,
5913 struct rpc_cred *cred)
5915 struct nfs4_session *session = clp->cl_session;
5916 struct nfs41_create_session_args args = {
5918 .cb_program = NFS4_CALLBACK,
5920 struct nfs41_create_session_res res = {
5923 struct rpc_message msg = {
5924 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5931 nfs4_init_channel_attrs(&args);
5932 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5934 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5937 /* Verify the session's negotiated channel_attrs values */
5938 status = nfs4_verify_channel_attrs(&args, session);
5939 /* Increment the clientid slot sequence id */
5947 * Issues a CREATE_SESSION operation to the server.
5948 * It is the responsibility of the caller to verify the session is
5949 * expired before calling this routine.
5951 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5955 struct nfs4_session *session = clp->cl_session;
5957 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5959 status = _nfs4_proc_create_session(clp, cred);
5963 /* Init or reset the session slot tables */
5964 status = nfs4_setup_session_slot_tables(session);
5965 dprintk("slot table setup returned %d\n", status);
5969 ptr = (unsigned *)&session->sess_id.data[0];
5970 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5971 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5973 dprintk("<-- %s\n", __func__);
5978 * Issue the over-the-wire RPC DESTROY_SESSION.
5979 * The caller must serialize access to this routine.
5981 int nfs4_proc_destroy_session(struct nfs4_session *session,
5982 struct rpc_cred *cred)
5984 struct rpc_message msg = {
5985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5986 .rpc_argp = session,
5991 dprintk("--> nfs4_proc_destroy_session\n");
5993 /* session is still being setup */
5994 if (session->clp->cl_cons_state != NFS_CS_READY)
5997 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6000 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
6001 "Session has been destroyed regardless...\n", status);
6003 dprintk("<-- nfs4_proc_destroy_session\n");
6008 * With sessions, the client is not marked ready until after a
6009 * successful EXCHANGE_ID and CREATE_SESSION.
6011 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
6012 * other versions of NFS can be tried.
6014 static int nfs41_check_session_ready(struct nfs_client *clp)
6018 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
6019 ret = nfs4_client_recover_expired_lease(clp);
6023 if (clp->cl_cons_state < NFS_CS_READY)
6024 return -EPROTONOSUPPORT;
6029 int nfs4_init_session(struct nfs_server *server)
6031 struct nfs_client *clp = server->nfs_client;
6032 struct nfs4_session *session;
6033 unsigned int target_max_rqst_sz = NFS_MAX_FILE_IO_SIZE;
6034 unsigned int target_max_resp_sz = NFS_MAX_FILE_IO_SIZE;
6036 if (!nfs4_has_session(clp))
6039 if (server->rsize != 0)
6040 target_max_resp_sz = server->rsize;
6041 target_max_resp_sz += nfs41_maxread_overhead;
6043 if (server->wsize != 0)
6044 target_max_rqst_sz = server->wsize;
6045 target_max_rqst_sz += nfs41_maxwrite_overhead;
6047 session = clp->cl_session;
6048 spin_lock(&clp->cl_lock);
6049 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
6050 /* Initialise targets and channel attributes */
6051 session->fc_target_max_rqst_sz = target_max_rqst_sz;
6052 session->fc_attrs.max_rqst_sz = target_max_rqst_sz;
6053 session->fc_target_max_resp_sz = target_max_resp_sz;
6054 session->fc_attrs.max_resp_sz = target_max_resp_sz;
6056 /* Just adjust the targets */
6057 if (target_max_rqst_sz > session->fc_target_max_rqst_sz) {
6058 session->fc_target_max_rqst_sz = target_max_rqst_sz;
6059 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
6061 if (target_max_resp_sz > session->fc_target_max_resp_sz) {
6062 session->fc_target_max_resp_sz = target_max_resp_sz;
6063 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
6066 spin_unlock(&clp->cl_lock);
6068 if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
6069 nfs4_schedule_lease_recovery(clp);
6071 return nfs41_check_session_ready(clp);
6074 int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
6076 struct nfs4_session *session = clp->cl_session;
6079 spin_lock(&clp->cl_lock);
6080 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
6082 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
6083 * DS lease to be equal to the MDS lease.
6085 clp->cl_lease_time = lease_time;
6086 clp->cl_last_renewal = jiffies;
6088 spin_unlock(&clp->cl_lock);
6090 ret = nfs41_check_session_ready(clp);
6093 /* Test for the DS role */
6094 if (!is_ds_client(clp))
6098 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
6102 * Renew the cl_session lease.
6104 struct nfs4_sequence_data {
6105 struct nfs_client *clp;
6106 struct nfs4_sequence_args args;
6107 struct nfs4_sequence_res res;
6110 static void nfs41_sequence_release(void *data)
6112 struct nfs4_sequence_data *calldata = data;
6113 struct nfs_client *clp = calldata->clp;
6115 if (atomic_read(&clp->cl_count) > 1)
6116 nfs4_schedule_state_renewal(clp);
6117 nfs_put_client(clp);
6121 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6123 switch(task->tk_status) {
6124 case -NFS4ERR_DELAY:
6125 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6128 nfs4_schedule_lease_recovery(clp);
6133 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
6135 struct nfs4_sequence_data *calldata = data;
6136 struct nfs_client *clp = calldata->clp;
6138 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6141 if (task->tk_status < 0) {
6142 dprintk("%s ERROR %d\n", __func__, task->tk_status);
6143 if (atomic_read(&clp->cl_count) == 1)
6146 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6147 rpc_restart_call_prepare(task);
6151 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
6153 dprintk("<-- %s\n", __func__);
6156 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6158 struct nfs4_sequence_data *calldata = data;
6159 struct nfs_client *clp = calldata->clp;
6160 struct nfs4_sequence_args *args;
6161 struct nfs4_sequence_res *res;
6163 args = task->tk_msg.rpc_argp;
6164 res = task->tk_msg.rpc_resp;
6166 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
6168 rpc_call_start(task);
6171 static void nfs41_sequence_prepare_privileged(struct rpc_task *task, void *data)
6173 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
6174 nfs41_sequence_prepare(task, data);
6177 static const struct rpc_call_ops nfs41_sequence_ops = {
6178 .rpc_call_done = nfs41_sequence_call_done,
6179 .rpc_call_prepare = nfs41_sequence_prepare,
6180 .rpc_release = nfs41_sequence_release,
6183 static const struct rpc_call_ops nfs41_sequence_privileged_ops = {
6184 .rpc_call_done = nfs41_sequence_call_done,
6185 .rpc_call_prepare = nfs41_sequence_prepare_privileged,
6186 .rpc_release = nfs41_sequence_release,
6189 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred,
6190 const struct rpc_call_ops *seq_ops)
6192 struct nfs4_sequence_data *calldata;
6193 struct rpc_message msg = {
6194 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6197 struct rpc_task_setup task_setup_data = {
6198 .rpc_client = clp->cl_rpcclient,
6199 .rpc_message = &msg,
6200 .callback_ops = seq_ops,
6201 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6204 if (!atomic_inc_not_zero(&clp->cl_count))
6205 return ERR_PTR(-EIO);
6206 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6207 if (calldata == NULL) {
6208 nfs_put_client(clp);
6209 return ERR_PTR(-ENOMEM);
6211 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
6212 msg.rpc_argp = &calldata->args;
6213 msg.rpc_resp = &calldata->res;
6214 calldata->clp = clp;
6215 task_setup_data.callback_data = calldata;
6217 return rpc_run_task(&task_setup_data);
6220 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
6222 struct rpc_task *task;
6225 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6227 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_ops);
6229 ret = PTR_ERR(task);
6231 rpc_put_task_async(task);
6232 dprintk("<-- %s status=%d\n", __func__, ret);
6236 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6238 struct rpc_task *task;
6241 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_privileged_ops);
6243 ret = PTR_ERR(task);
6246 ret = rpc_wait_for_completion_task(task);
6248 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6250 if (task->tk_status == 0)
6251 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
6252 ret = task->tk_status;
6256 dprintk("<-- %s status=%d\n", __func__, ret);
6260 struct nfs4_reclaim_complete_data {
6261 struct nfs_client *clp;
6262 struct nfs41_reclaim_complete_args arg;
6263 struct nfs41_reclaim_complete_res res;
6266 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6268 struct nfs4_reclaim_complete_data *calldata = data;
6270 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
6271 if (nfs41_setup_sequence(calldata->clp->cl_session,
6272 &calldata->arg.seq_args,
6273 &calldata->res.seq_res, task))
6276 rpc_call_start(task);
6279 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6281 switch(task->tk_status) {
6283 case -NFS4ERR_COMPLETE_ALREADY:
6284 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6286 case -NFS4ERR_DELAY:
6287 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6289 case -NFS4ERR_RETRY_UNCACHED_REP:
6292 nfs4_schedule_lease_recovery(clp);
6297 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6299 struct nfs4_reclaim_complete_data *calldata = data;
6300 struct nfs_client *clp = calldata->clp;
6301 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6303 dprintk("--> %s\n", __func__);
6304 if (!nfs41_sequence_done(task, res))
6307 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6308 rpc_restart_call_prepare(task);
6311 dprintk("<-- %s\n", __func__);
6314 static void nfs4_free_reclaim_complete_data(void *data)
6316 struct nfs4_reclaim_complete_data *calldata = data;
6321 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6322 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6323 .rpc_call_done = nfs4_reclaim_complete_done,
6324 .rpc_release = nfs4_free_reclaim_complete_data,
6328 * Issue a global reclaim complete.
6330 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6332 struct nfs4_reclaim_complete_data *calldata;
6333 struct rpc_task *task;
6334 struct rpc_message msg = {
6335 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6337 struct rpc_task_setup task_setup_data = {
6338 .rpc_client = clp->cl_rpcclient,
6339 .rpc_message = &msg,
6340 .callback_ops = &nfs4_reclaim_complete_call_ops,
6341 .flags = RPC_TASK_ASYNC,
6343 int status = -ENOMEM;
6345 dprintk("--> %s\n", __func__);
6346 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6347 if (calldata == NULL)
6349 calldata->clp = clp;
6350 calldata->arg.one_fs = 0;
6352 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6353 msg.rpc_argp = &calldata->arg;
6354 msg.rpc_resp = &calldata->res;
6355 task_setup_data.callback_data = calldata;
6356 task = rpc_run_task(&task_setup_data);
6358 status = PTR_ERR(task);
6361 status = nfs4_wait_for_completion_rpc_task(task);
6363 status = task->tk_status;
6367 dprintk("<-- %s status=%d\n", __func__, status);
6372 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6374 struct nfs4_layoutget *lgp = calldata;
6375 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6377 dprintk("--> %s\n", __func__);
6378 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6379 * right now covering the LAYOUTGET we are about to send.
6380 * However, that is not so catastrophic, and there seems
6381 * to be no way to prevent it completely.
6383 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
6384 &lgp->res.seq_res, task))
6386 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6387 NFS_I(lgp->args.inode)->layout,
6388 lgp->args.ctx->state)) {
6389 rpc_exit(task, NFS4_OK);
6392 rpc_call_start(task);
6395 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6397 struct nfs4_layoutget *lgp = calldata;
6398 struct inode *inode = lgp->args.inode;
6399 struct nfs_server *server = NFS_SERVER(inode);
6400 struct pnfs_layout_hdr *lo;
6401 struct nfs4_state *state = NULL;
6403 dprintk("--> %s\n", __func__);
6405 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6408 switch (task->tk_status) {
6411 case -NFS4ERR_LAYOUTTRYLATER:
6412 case -NFS4ERR_RECALLCONFLICT:
6413 task->tk_status = -NFS4ERR_DELAY;
6415 case -NFS4ERR_EXPIRED:
6416 case -NFS4ERR_BAD_STATEID:
6417 spin_lock(&inode->i_lock);
6418 lo = NFS_I(inode)->layout;
6419 if (!lo || list_empty(&lo->plh_segs)) {
6420 spin_unlock(&inode->i_lock);
6421 /* If the open stateid was bad, then recover it. */
6422 state = lgp->args.ctx->state;
6426 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6427 spin_unlock(&inode->i_lock);
6428 /* Mark the bad layout state as invalid, then
6429 * retry using the open stateid. */
6430 pnfs_free_lseg_list(&head);
6433 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6434 rpc_restart_call_prepare(task);
6436 dprintk("<-- %s\n", __func__);
6439 static size_t max_response_pages(struct nfs_server *server)
6441 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6442 return nfs_page_array_len(0, max_resp_sz);
6445 static void nfs4_free_pages(struct page **pages, size_t size)
6452 for (i = 0; i < size; i++) {
6455 __free_page(pages[i]);
6460 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6462 struct page **pages;
6465 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6467 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6471 for (i = 0; i < size; i++) {
6472 pages[i] = alloc_page(gfp_flags);
6474 dprintk("%s: failed to allocate page\n", __func__);
6475 nfs4_free_pages(pages, size);
6483 static void nfs4_layoutget_release(void *calldata)
6485 struct nfs4_layoutget *lgp = calldata;
6486 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6487 size_t max_pages = max_response_pages(server);
6489 dprintk("--> %s\n", __func__);
6490 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6491 put_nfs_open_context(lgp->args.ctx);
6493 dprintk("<-- %s\n", __func__);
6496 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6497 .rpc_call_prepare = nfs4_layoutget_prepare,
6498 .rpc_call_done = nfs4_layoutget_done,
6499 .rpc_release = nfs4_layoutget_release,
6502 struct pnfs_layout_segment *
6503 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6505 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6506 size_t max_pages = max_response_pages(server);
6507 struct rpc_task *task;
6508 struct rpc_message msg = {
6509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6510 .rpc_argp = &lgp->args,
6511 .rpc_resp = &lgp->res,
6513 struct rpc_task_setup task_setup_data = {
6514 .rpc_client = server->client,
6515 .rpc_message = &msg,
6516 .callback_ops = &nfs4_layoutget_call_ops,
6517 .callback_data = lgp,
6518 .flags = RPC_TASK_ASYNC,
6520 struct pnfs_layout_segment *lseg = NULL;
6523 dprintk("--> %s\n", __func__);
6525 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6526 if (!lgp->args.layout.pages) {
6527 nfs4_layoutget_release(lgp);
6528 return ERR_PTR(-ENOMEM);
6530 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6532 lgp->res.layoutp = &lgp->args.layout;
6533 lgp->res.seq_res.sr_slot = NULL;
6534 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6535 task = rpc_run_task(&task_setup_data);
6537 return ERR_CAST(task);
6538 status = nfs4_wait_for_completion_rpc_task(task);
6540 status = task->tk_status;
6542 lseg = pnfs_layout_process(lgp);
6544 dprintk("<-- %s status=%d\n", __func__, status);
6546 return ERR_PTR(status);
6551 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6553 struct nfs4_layoutreturn *lrp = calldata;
6555 dprintk("--> %s\n", __func__);
6556 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
6557 &lrp->res.seq_res, task))
6559 rpc_call_start(task);
6562 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6564 struct nfs4_layoutreturn *lrp = calldata;
6565 struct nfs_server *server;
6567 dprintk("--> %s\n", __func__);
6569 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6572 server = NFS_SERVER(lrp->args.inode);
6573 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6574 rpc_restart_call_prepare(task);
6577 dprintk("<-- %s\n", __func__);
6580 static void nfs4_layoutreturn_release(void *calldata)
6582 struct nfs4_layoutreturn *lrp = calldata;
6583 struct pnfs_layout_hdr *lo = lrp->args.layout;
6585 dprintk("--> %s\n", __func__);
6586 spin_lock(&lo->plh_inode->i_lock);
6587 if (lrp->res.lrs_present)
6588 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6589 lo->plh_block_lgets--;
6590 spin_unlock(&lo->plh_inode->i_lock);
6591 pnfs_put_layout_hdr(lrp->args.layout);
6593 dprintk("<-- %s\n", __func__);
6596 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6597 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6598 .rpc_call_done = nfs4_layoutreturn_done,
6599 .rpc_release = nfs4_layoutreturn_release,
6602 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6604 struct rpc_task *task;
6605 struct rpc_message msg = {
6606 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6607 .rpc_argp = &lrp->args,
6608 .rpc_resp = &lrp->res,
6610 struct rpc_task_setup task_setup_data = {
6611 .rpc_client = lrp->clp->cl_rpcclient,
6612 .rpc_message = &msg,
6613 .callback_ops = &nfs4_layoutreturn_call_ops,
6614 .callback_data = lrp,
6618 dprintk("--> %s\n", __func__);
6619 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6620 task = rpc_run_task(&task_setup_data);
6622 return PTR_ERR(task);
6623 status = task->tk_status;
6624 dprintk("<-- %s status=%d\n", __func__, status);
6630 * Retrieve the list of Data Server devices from the MDS.
6632 static int _nfs4_getdevicelist(struct nfs_server *server,
6633 const struct nfs_fh *fh,
6634 struct pnfs_devicelist *devlist)
6636 struct nfs4_getdevicelist_args args = {
6638 .layoutclass = server->pnfs_curr_ld->id,
6640 struct nfs4_getdevicelist_res res = {
6643 struct rpc_message msg = {
6644 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6650 dprintk("--> %s\n", __func__);
6651 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6653 dprintk("<-- %s status=%d\n", __func__, status);
6657 int nfs4_proc_getdevicelist(struct nfs_server *server,
6658 const struct nfs_fh *fh,
6659 struct pnfs_devicelist *devlist)
6661 struct nfs4_exception exception = { };
6665 err = nfs4_handle_exception(server,
6666 _nfs4_getdevicelist(server, fh, devlist),
6668 } while (exception.retry);
6670 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6671 err, devlist->num_devs);
6675 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6678 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6680 struct nfs4_getdeviceinfo_args args = {
6683 struct nfs4_getdeviceinfo_res res = {
6686 struct rpc_message msg = {
6687 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6693 dprintk("--> %s\n", __func__);
6694 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6695 dprintk("<-- %s status=%d\n", __func__, status);
6700 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6702 struct nfs4_exception exception = { };
6706 err = nfs4_handle_exception(server,
6707 _nfs4_proc_getdeviceinfo(server, pdev),
6709 } while (exception.retry);
6712 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6714 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6716 struct nfs4_layoutcommit_data *data = calldata;
6717 struct nfs_server *server = NFS_SERVER(data->args.inode);
6719 if (nfs4_setup_sequence(server, &data->args.seq_args,
6720 &data->res.seq_res, task))
6722 rpc_call_start(task);
6726 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6728 struct nfs4_layoutcommit_data *data = calldata;
6729 struct nfs_server *server = NFS_SERVER(data->args.inode);
6731 if (!nfs4_sequence_done(task, &data->res.seq_res))
6734 switch (task->tk_status) { /* Just ignore these failures */
6735 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6736 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6737 case -NFS4ERR_BADLAYOUT: /* no layout */
6738 case -NFS4ERR_GRACE: /* loca_recalim always false */
6739 task->tk_status = 0;
6742 nfs_post_op_update_inode_force_wcc(data->args.inode,
6746 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6747 rpc_restart_call_prepare(task);
6753 static void nfs4_layoutcommit_release(void *calldata)
6755 struct nfs4_layoutcommit_data *data = calldata;
6756 struct pnfs_layout_segment *lseg, *tmp;
6757 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6759 pnfs_cleanup_layoutcommit(data);
6760 /* Matched by references in pnfs_set_layoutcommit */
6761 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6762 list_del_init(&lseg->pls_lc_list);
6763 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6765 pnfs_put_lseg(lseg);
6768 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6769 smp_mb__after_clear_bit();
6770 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6772 put_rpccred(data->cred);
6776 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6777 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6778 .rpc_call_done = nfs4_layoutcommit_done,
6779 .rpc_release = nfs4_layoutcommit_release,
6783 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6785 struct rpc_message msg = {
6786 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6787 .rpc_argp = &data->args,
6788 .rpc_resp = &data->res,
6789 .rpc_cred = data->cred,
6791 struct rpc_task_setup task_setup_data = {
6792 .task = &data->task,
6793 .rpc_client = NFS_CLIENT(data->args.inode),
6794 .rpc_message = &msg,
6795 .callback_ops = &nfs4_layoutcommit_ops,
6796 .callback_data = data,
6797 .flags = RPC_TASK_ASYNC,
6799 struct rpc_task *task;
6802 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6803 "lbw: %llu inode %lu\n",
6804 data->task.tk_pid, sync,
6805 data->args.lastbytewritten,
6806 data->args.inode->i_ino);
6808 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6809 task = rpc_run_task(&task_setup_data);
6811 return PTR_ERR(task);
6814 status = nfs4_wait_for_completion_rpc_task(task);
6817 status = task->tk_status;
6819 dprintk("%s: status %d\n", __func__, status);
6825 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6826 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6828 struct nfs41_secinfo_no_name_args args = {
6829 .style = SECINFO_STYLE_CURRENT_FH,
6831 struct nfs4_secinfo_res res = {
6834 struct rpc_message msg = {
6835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6839 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6843 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6844 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6846 struct nfs4_exception exception = { };
6849 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6852 case -NFS4ERR_WRONGSEC:
6853 case -NFS4ERR_NOTSUPP:
6856 err = nfs4_handle_exception(server, err, &exception);
6858 } while (exception.retry);
6864 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6865 struct nfs_fsinfo *info)
6869 rpc_authflavor_t flavor;
6870 struct nfs4_secinfo_flavors *flavors;
6872 page = alloc_page(GFP_KERNEL);
6878 flavors = page_address(page);
6879 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6882 * Fall back on "guess and check" method if
6883 * the server doesn't support SECINFO_NO_NAME
6885 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6886 err = nfs4_find_root_sec(server, fhandle, info);
6892 flavor = nfs_find_best_sec(flavors);
6894 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6904 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6907 struct nfs41_test_stateid_args args = {
6910 struct nfs41_test_stateid_res res;
6911 struct rpc_message msg = {
6912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6917 dprintk("NFS call test_stateid %p\n", stateid);
6918 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6919 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6920 if (status != NFS_OK) {
6921 dprintk("NFS reply test_stateid: failed, %d\n", status);
6924 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
6929 * nfs41_test_stateid - perform a TEST_STATEID operation
6931 * @server: server / transport on which to perform the operation
6932 * @stateid: state ID to test
6934 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6935 * Otherwise a negative NFS4ERR value is returned if the operation
6936 * failed or the state ID is not currently valid.
6938 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6940 struct nfs4_exception exception = { };
6943 err = _nfs41_test_stateid(server, stateid);
6944 if (err != -NFS4ERR_DELAY)
6946 nfs4_handle_exception(server, err, &exception);
6947 } while (exception.retry);
6951 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6953 struct nfs41_free_stateid_args args = {
6956 struct nfs41_free_stateid_res res;
6957 struct rpc_message msg = {
6958 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6964 dprintk("NFS call free_stateid %p\n", stateid);
6965 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6966 status = nfs4_call_sync_sequence(server->client, server, &msg,
6967 &args.seq_args, &res.seq_res, 1);
6968 dprintk("NFS reply free_stateid: %d\n", status);
6973 * nfs41_free_stateid - perform a FREE_STATEID operation
6975 * @server: server / transport on which to perform the operation
6976 * @stateid: state ID to release
6978 * Returns NFS_OK if the server freed "stateid". Otherwise a
6979 * negative NFS4ERR value is returned.
6981 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6983 struct nfs4_exception exception = { };
6986 err = _nfs4_free_stateid(server, stateid);
6987 if (err != -NFS4ERR_DELAY)
6989 nfs4_handle_exception(server, err, &exception);
6990 } while (exception.retry);
6994 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6995 const nfs4_stateid *s2)
6997 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
7000 if (s1->seqid == s2->seqid)
7002 if (s1->seqid == 0 || s2->seqid == 0)
7008 #endif /* CONFIG_NFS_V4_1 */
7010 static bool nfs4_match_stateid(const nfs4_stateid *s1,
7011 const nfs4_stateid *s2)
7013 return nfs4_stateid_match(s1, s2);
7017 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7018 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7019 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7020 .recover_open = nfs4_open_reclaim,
7021 .recover_lock = nfs4_lock_reclaim,
7022 .establish_clid = nfs4_init_clientid,
7023 .get_clid_cred = nfs4_get_setclientid_cred,
7024 .detect_trunking = nfs40_discover_server_trunking,
7027 #if defined(CONFIG_NFS_V4_1)
7028 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
7029 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7030 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7031 .recover_open = nfs4_open_reclaim,
7032 .recover_lock = nfs4_lock_reclaim,
7033 .establish_clid = nfs41_init_clientid,
7034 .get_clid_cred = nfs4_get_exchange_id_cred,
7035 .reclaim_complete = nfs41_proc_reclaim_complete,
7036 .detect_trunking = nfs41_discover_server_trunking,
7038 #endif /* CONFIG_NFS_V4_1 */
7040 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
7041 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7042 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7043 .recover_open = nfs4_open_expired,
7044 .recover_lock = nfs4_lock_expired,
7045 .establish_clid = nfs4_init_clientid,
7046 .get_clid_cred = nfs4_get_setclientid_cred,
7049 #if defined(CONFIG_NFS_V4_1)
7050 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7051 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7052 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7053 .recover_open = nfs41_open_expired,
7054 .recover_lock = nfs41_lock_expired,
7055 .establish_clid = nfs41_init_clientid,
7056 .get_clid_cred = nfs4_get_exchange_id_cred,
7058 #endif /* CONFIG_NFS_V4_1 */
7060 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
7061 .sched_state_renewal = nfs4_proc_async_renew,
7062 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
7063 .renew_lease = nfs4_proc_renew,
7066 #if defined(CONFIG_NFS_V4_1)
7067 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
7068 .sched_state_renewal = nfs41_proc_async_sequence,
7069 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
7070 .renew_lease = nfs4_proc_sequence,
7074 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7076 .call_sync = _nfs4_call_sync,
7077 .match_stateid = nfs4_match_stateid,
7078 .find_root_sec = nfs4_find_root_sec,
7079 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7080 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7081 .state_renewal_ops = &nfs40_state_renewal_ops,
7084 #if defined(CONFIG_NFS_V4_1)
7085 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7087 .call_sync = _nfs4_call_sync_session,
7088 .match_stateid = nfs41_match_stateid,
7089 .find_root_sec = nfs41_find_root_sec,
7090 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7091 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7092 .state_renewal_ops = &nfs41_state_renewal_ops,
7096 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7097 [0] = &nfs_v4_0_minor_ops,
7098 #if defined(CONFIG_NFS_V4_1)
7099 [1] = &nfs_v4_1_minor_ops,
7103 const struct inode_operations nfs4_dir_inode_operations = {
7104 .create = nfs_create,
7105 .lookup = nfs_lookup,
7106 .atomic_open = nfs_atomic_open,
7108 .unlink = nfs_unlink,
7109 .symlink = nfs_symlink,
7113 .rename = nfs_rename,
7114 .permission = nfs_permission,
7115 .getattr = nfs_getattr,
7116 .setattr = nfs_setattr,
7117 .getxattr = generic_getxattr,
7118 .setxattr = generic_setxattr,
7119 .listxattr = generic_listxattr,
7120 .removexattr = generic_removexattr,
7123 static const struct inode_operations nfs4_file_inode_operations = {
7124 .permission = nfs_permission,
7125 .getattr = nfs_getattr,
7126 .setattr = nfs_setattr,
7127 .getxattr = generic_getxattr,
7128 .setxattr = generic_setxattr,
7129 .listxattr = generic_listxattr,
7130 .removexattr = generic_removexattr,
7133 const struct nfs_rpc_ops nfs_v4_clientops = {
7134 .version = 4, /* protocol version */
7135 .dentry_ops = &nfs4_dentry_operations,
7136 .dir_inode_ops = &nfs4_dir_inode_operations,
7137 .file_inode_ops = &nfs4_file_inode_operations,
7138 .file_ops = &nfs4_file_operations,
7139 .getroot = nfs4_proc_get_root,
7140 .submount = nfs4_submount,
7141 .try_mount = nfs4_try_mount,
7142 .getattr = nfs4_proc_getattr,
7143 .setattr = nfs4_proc_setattr,
7144 .lookup = nfs4_proc_lookup,
7145 .access = nfs4_proc_access,
7146 .readlink = nfs4_proc_readlink,
7147 .create = nfs4_proc_create,
7148 .remove = nfs4_proc_remove,
7149 .unlink_setup = nfs4_proc_unlink_setup,
7150 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
7151 .unlink_done = nfs4_proc_unlink_done,
7152 .rename = nfs4_proc_rename,
7153 .rename_setup = nfs4_proc_rename_setup,
7154 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
7155 .rename_done = nfs4_proc_rename_done,
7156 .link = nfs4_proc_link,
7157 .symlink = nfs4_proc_symlink,
7158 .mkdir = nfs4_proc_mkdir,
7159 .rmdir = nfs4_proc_remove,
7160 .readdir = nfs4_proc_readdir,
7161 .mknod = nfs4_proc_mknod,
7162 .statfs = nfs4_proc_statfs,
7163 .fsinfo = nfs4_proc_fsinfo,
7164 .pathconf = nfs4_proc_pathconf,
7165 .set_capabilities = nfs4_server_capabilities,
7166 .decode_dirent = nfs4_decode_dirent,
7167 .read_setup = nfs4_proc_read_setup,
7168 .read_pageio_init = pnfs_pageio_init_read,
7169 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
7170 .read_done = nfs4_read_done,
7171 .write_setup = nfs4_proc_write_setup,
7172 .write_pageio_init = pnfs_pageio_init_write,
7173 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
7174 .write_done = nfs4_write_done,
7175 .commit_setup = nfs4_proc_commit_setup,
7176 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
7177 .commit_done = nfs4_commit_done,
7178 .lock = nfs4_proc_lock,
7179 .clear_acl_cache = nfs4_zap_acl_attr,
7180 .close_context = nfs4_close_context,
7181 .open_context = nfs4_atomic_open,
7182 .have_delegation = nfs4_have_delegation,
7183 .return_delegation = nfs4_inode_return_delegation,
7184 .alloc_client = nfs4_alloc_client,
7185 .init_client = nfs4_init_client,
7186 .free_client = nfs4_free_client,
7187 .create_server = nfs4_create_server,
7188 .clone_server = nfs_clone_server,
7191 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7192 .prefix = XATTR_NAME_NFSV4_ACL,
7193 .list = nfs4_xattr_list_nfs4_acl,
7194 .get = nfs4_xattr_get_nfs4_acl,
7195 .set = nfs4_xattr_set_nfs4_acl,
7198 const struct xattr_handler *nfs4_xattr_handlers[] = {
7199 &nfs4_xattr_nfs4_acl_handler,