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)
209 BUG_ON(readdir->count < 80);
211 readdir->cookie = cookie;
212 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
217 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
222 * NFSv4 servers do not return entries for '.' and '..'
223 * Therefore, we fake these entries here. We let '.'
224 * have cookie 0 and '..' have cookie 1. Note that
225 * when talking to the server, we always send cookie 0
228 start = p = kmap_atomic(*readdir->pages);
231 *p++ = xdr_one; /* next */
232 *p++ = xdr_zero; /* cookie, first word */
233 *p++ = xdr_one; /* cookie, second word */
234 *p++ = xdr_one; /* entry len */
235 memcpy(p, ".\0\0\0", 4); /* entry */
237 *p++ = xdr_one; /* bitmap length */
238 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
239 *p++ = htonl(8); /* attribute buffer length */
240 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
243 *p++ = xdr_one; /* next */
244 *p++ = xdr_zero; /* cookie, first word */
245 *p++ = xdr_two; /* cookie, second word */
246 *p++ = xdr_two; /* entry len */
247 memcpy(p, "..\0\0", 4); /* entry */
249 *p++ = xdr_one; /* bitmap length */
250 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
251 *p++ = htonl(8); /* attribute buffer length */
252 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
254 readdir->pgbase = (char *)p - (char *)start;
255 readdir->count -= readdir->pgbase;
256 kunmap_atomic(start);
259 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
265 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
266 nfs_wait_bit_killable, TASK_KILLABLE);
270 if (clp->cl_cons_state < 0)
271 return clp->cl_cons_state;
275 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
282 *timeout = NFS4_POLL_RETRY_MIN;
283 if (*timeout > NFS4_POLL_RETRY_MAX)
284 *timeout = NFS4_POLL_RETRY_MAX;
285 freezable_schedule_timeout_killable(*timeout);
286 if (fatal_signal_pending(current))
292 /* This is the error handling routine for processes that are allowed
295 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
297 struct nfs_client *clp = server->nfs_client;
298 struct nfs4_state *state = exception->state;
299 struct inode *inode = exception->inode;
302 exception->retry = 0;
306 case -NFS4ERR_OPENMODE:
307 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
308 nfs4_inode_return_delegation(inode);
309 exception->retry = 1;
314 nfs4_schedule_stateid_recovery(server, state);
315 goto wait_on_recovery;
316 case -NFS4ERR_DELEG_REVOKED:
317 case -NFS4ERR_ADMIN_REVOKED:
318 case -NFS4ERR_BAD_STATEID:
321 nfs_remove_bad_delegation(state->inode);
322 nfs4_schedule_stateid_recovery(server, state);
323 goto wait_on_recovery;
324 case -NFS4ERR_EXPIRED:
326 nfs4_schedule_stateid_recovery(server, state);
327 case -NFS4ERR_STALE_STATEID:
328 case -NFS4ERR_STALE_CLIENTID:
329 nfs4_schedule_lease_recovery(clp);
330 goto wait_on_recovery;
331 #if defined(CONFIG_NFS_V4_1)
332 case -NFS4ERR_BADSESSION:
333 case -NFS4ERR_BADSLOT:
334 case -NFS4ERR_BAD_HIGH_SLOT:
335 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
336 case -NFS4ERR_DEADSESSION:
337 case -NFS4ERR_SEQ_FALSE_RETRY:
338 case -NFS4ERR_SEQ_MISORDERED:
339 dprintk("%s ERROR: %d Reset session\n", __func__,
341 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
342 goto wait_on_recovery;
343 #endif /* defined(CONFIG_NFS_V4_1) */
344 case -NFS4ERR_FILE_OPEN:
345 if (exception->timeout > HZ) {
346 /* We have retried a decent amount, time to
355 ret = nfs4_delay(server->client, &exception->timeout);
358 case -NFS4ERR_RETRY_UNCACHED_REP:
359 case -NFS4ERR_OLD_STATEID:
360 exception->retry = 1;
362 case -NFS4ERR_BADOWNER:
363 /* The following works around a Linux server bug! */
364 case -NFS4ERR_BADNAME:
365 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
366 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
367 exception->retry = 1;
368 printk(KERN_WARNING "NFS: v4 server %s "
369 "does not accept raw "
371 "Reenabling the idmapper.\n",
372 server->nfs_client->cl_hostname);
375 /* We failed to handle the error */
376 return nfs4_map_errors(ret);
378 ret = nfs4_wait_clnt_recover(clp);
380 exception->retry = 1;
385 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
387 spin_lock(&clp->cl_lock);
388 if (time_before(clp->cl_last_renewal,timestamp))
389 clp->cl_last_renewal = timestamp;
390 spin_unlock(&clp->cl_lock);
393 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
395 do_renew_lease(server->nfs_client, timestamp);
398 #if defined(CONFIG_NFS_V4_1)
401 * nfs4_free_slot - free a slot and efficiently update slot table.
403 * freeing a slot is trivially done by clearing its respective bit
405 * If the freed slotid equals highest_used_slotid we want to update it
406 * so that the server would be able to size down the slot table if needed,
407 * otherwise we know that the highest_used_slotid is still in use.
408 * When updating highest_used_slotid there may be "holes" in the bitmap
409 * so we need to scan down from highest_used_slotid to 0 looking for the now
410 * highest slotid in use.
411 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
413 * Must be called while holding tbl->slot_tbl_lock
416 nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
418 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
419 /* clear used bit in bitmap */
420 __clear_bit(slotid, tbl->used_slots);
422 /* update highest_used_slotid when it is freed */
423 if (slotid == tbl->highest_used_slotid) {
424 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
425 if (slotid < tbl->max_slots)
426 tbl->highest_used_slotid = slotid;
428 tbl->highest_used_slotid = NFS4_NO_SLOT;
430 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
431 slotid, tbl->highest_used_slotid);
434 bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
436 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
441 * Signal state manager thread if session fore channel is drained
443 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
445 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
446 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
447 nfs4_set_task_privileged, NULL);
451 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
454 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
455 complete(&ses->fc_slot_table.complete);
459 * Signal state manager thread if session back channel is drained
461 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
463 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
464 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
466 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
467 complete(&ses->bc_slot_table.complete);
470 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
472 struct nfs4_slot_table *tbl;
474 tbl = &res->sr_session->fc_slot_table;
476 /* just wake up the next guy waiting since
477 * we may have not consumed a slot after all */
478 dprintk("%s: No slot\n", __func__);
482 spin_lock(&tbl->slot_tbl_lock);
483 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
484 nfs4_check_drain_fc_complete(res->sr_session);
485 spin_unlock(&tbl->slot_tbl_lock);
489 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
491 unsigned long timestamp;
492 struct nfs_client *clp;
495 * sr_status remains 1 if an RPC level error occurred. The server
496 * may or may not have processed the sequence operation..
497 * Proceed as if the server received and processed the sequence
500 if (res->sr_status == 1)
501 res->sr_status = NFS_OK;
503 /* don't increment the sequence number if the task wasn't sent */
504 if (!RPC_WAS_SENT(task))
507 /* Check the SEQUENCE operation status */
508 switch (res->sr_status) {
510 /* Update the slot's sequence and clientid lease timer */
511 ++res->sr_slot->seq_nr;
512 timestamp = res->sr_renewal_time;
513 clp = res->sr_session->clp;
514 do_renew_lease(clp, timestamp);
515 /* Check sequence flags */
516 if (res->sr_status_flags != 0)
517 nfs4_schedule_lease_recovery(clp);
520 /* The server detected a resend of the RPC call and
521 * returned NFS4ERR_DELAY as per Section 2.10.6.2
524 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
526 res->sr_slot - res->sr_session->fc_slot_table.slots,
527 res->sr_slot->seq_nr);
530 /* Just update the slot sequence no. */
531 ++res->sr_slot->seq_nr;
534 /* The session may be reset by one of the error handlers. */
535 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
536 nfs41_sequence_free_slot(res);
539 if (!rpc_restart_call(task))
541 rpc_delay(task, NFS4_POLL_RETRY_MAX);
545 static int nfs4_sequence_done(struct rpc_task *task,
546 struct nfs4_sequence_res *res)
548 if (res->sr_session == NULL)
550 return nfs41_sequence_done(task, res);
554 * nfs4_find_slot - efficiently look for a free slot
556 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
557 * If found, we mark the slot as used, update the highest_used_slotid,
558 * and respectively set up the sequence operation args.
559 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
561 * Note: must be called with under the slot_tbl_lock.
564 nfs4_find_slot(struct nfs4_slot_table *tbl)
567 u32 ret_id = NFS4_NO_SLOT;
569 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
570 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
572 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
573 if (slotid >= tbl->max_slots)
575 __set_bit(slotid, tbl->used_slots);
576 if (slotid > tbl->highest_used_slotid ||
577 tbl->highest_used_slotid == NFS4_NO_SLOT)
578 tbl->highest_used_slotid = slotid;
581 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
582 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
586 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
587 struct nfs4_sequence_res *res, int cache_reply)
589 args->sa_session = NULL;
590 args->sa_cache_this = 0;
592 args->sa_cache_this = 1;
593 res->sr_session = NULL;
597 int nfs41_setup_sequence(struct nfs4_session *session,
598 struct nfs4_sequence_args *args,
599 struct nfs4_sequence_res *res,
600 struct rpc_task *task)
602 struct nfs4_slot *slot;
603 struct nfs4_slot_table *tbl;
606 dprintk("--> %s\n", __func__);
607 /* slot already allocated? */
608 if (res->sr_slot != NULL)
611 tbl = &session->fc_slot_table;
613 spin_lock(&tbl->slot_tbl_lock);
614 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
615 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
616 /* The state manager will wait until the slot table is empty */
617 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
618 spin_unlock(&tbl->slot_tbl_lock);
619 dprintk("%s session is draining\n", __func__);
623 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
624 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
625 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
626 spin_unlock(&tbl->slot_tbl_lock);
627 dprintk("%s enforce FIFO order\n", __func__);
631 slotid = nfs4_find_slot(tbl);
632 if (slotid == NFS4_NO_SLOT) {
633 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
634 spin_unlock(&tbl->slot_tbl_lock);
635 dprintk("<-- %s: no free slots\n", __func__);
638 spin_unlock(&tbl->slot_tbl_lock);
640 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
641 slot = tbl->slots + slotid;
642 args->sa_session = session;
643 args->sa_slotid = slotid;
645 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
647 res->sr_session = session;
649 res->sr_renewal_time = jiffies;
650 res->sr_status_flags = 0;
652 * sr_status is only set in decode_sequence, and so will remain
653 * set to 1 if an rpc level failure occurs.
658 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
660 int nfs4_setup_sequence(const struct nfs_server *server,
661 struct nfs4_sequence_args *args,
662 struct nfs4_sequence_res *res,
663 struct rpc_task *task)
665 struct nfs4_session *session = nfs4_get_session(server);
671 dprintk("--> %s clp %p session %p sr_slot %td\n",
672 __func__, session->clp, session, res->sr_slot ?
673 res->sr_slot - session->fc_slot_table.slots : -1);
675 ret = nfs41_setup_sequence(session, args, res, task);
677 dprintk("<-- %s status=%d\n", __func__, ret);
681 struct nfs41_call_sync_data {
682 const struct nfs_server *seq_server;
683 struct nfs4_sequence_args *seq_args;
684 struct nfs4_sequence_res *seq_res;
687 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
689 struct nfs41_call_sync_data *data = calldata;
691 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
693 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
694 data->seq_res, task))
696 rpc_call_start(task);
699 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
701 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
702 nfs41_call_sync_prepare(task, calldata);
705 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
707 struct nfs41_call_sync_data *data = calldata;
709 nfs41_sequence_done(task, data->seq_res);
712 static const struct rpc_call_ops nfs41_call_sync_ops = {
713 .rpc_call_prepare = nfs41_call_sync_prepare,
714 .rpc_call_done = nfs41_call_sync_done,
717 static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
718 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
719 .rpc_call_done = nfs41_call_sync_done,
722 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
723 struct nfs_server *server,
724 struct rpc_message *msg,
725 struct nfs4_sequence_args *args,
726 struct nfs4_sequence_res *res,
730 struct rpc_task *task;
731 struct nfs41_call_sync_data data = {
732 .seq_server = server,
736 struct rpc_task_setup task_setup = {
739 .callback_ops = &nfs41_call_sync_ops,
740 .callback_data = &data
744 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
745 task = rpc_run_task(&task_setup);
749 ret = task->tk_status;
755 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
756 struct nfs_server *server,
757 struct rpc_message *msg,
758 struct nfs4_sequence_args *args,
759 struct nfs4_sequence_res *res,
762 nfs41_init_sequence(args, res, cache_reply);
763 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
768 void nfs41_init_sequence(struct nfs4_sequence_args *args,
769 struct nfs4_sequence_res *res, int cache_reply)
773 static int nfs4_sequence_done(struct rpc_task *task,
774 struct nfs4_sequence_res *res)
778 #endif /* CONFIG_NFS_V4_1 */
780 int _nfs4_call_sync(struct rpc_clnt *clnt,
781 struct nfs_server *server,
782 struct rpc_message *msg,
783 struct nfs4_sequence_args *args,
784 struct nfs4_sequence_res *res,
787 nfs41_init_sequence(args, res, cache_reply);
788 return rpc_call_sync(clnt, msg, 0);
792 int nfs4_call_sync(struct rpc_clnt *clnt,
793 struct nfs_server *server,
794 struct rpc_message *msg,
795 struct nfs4_sequence_args *args,
796 struct nfs4_sequence_res *res,
799 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
800 args, res, cache_reply);
803 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
805 struct nfs_inode *nfsi = NFS_I(dir);
807 spin_lock(&dir->i_lock);
808 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
809 if (!cinfo->atomic || cinfo->before != dir->i_version)
810 nfs_force_lookup_revalidate(dir);
811 dir->i_version = cinfo->after;
812 spin_unlock(&dir->i_lock);
815 struct nfs4_opendata {
817 struct nfs_openargs o_arg;
818 struct nfs_openres o_res;
819 struct nfs_open_confirmargs c_arg;
820 struct nfs_open_confirmres c_res;
821 struct nfs4_string owner_name;
822 struct nfs4_string group_name;
823 struct nfs_fattr f_attr;
825 struct dentry *dentry;
826 struct nfs4_state_owner *owner;
827 struct nfs4_state *state;
829 unsigned long timestamp;
830 unsigned int rpc_done : 1;
836 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
838 p->o_res.f_attr = &p->f_attr;
839 p->o_res.seqid = p->o_arg.seqid;
840 p->c_res.seqid = p->c_arg.seqid;
841 p->o_res.server = p->o_arg.server;
842 p->o_res.access_request = p->o_arg.access;
843 nfs_fattr_init(&p->f_attr);
844 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
847 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
848 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
849 const struct iattr *attrs,
852 struct dentry *parent = dget_parent(dentry);
853 struct inode *dir = parent->d_inode;
854 struct nfs_server *server = NFS_SERVER(dir);
855 struct nfs4_opendata *p;
857 p = kzalloc(sizeof(*p), gfp_mask);
860 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
861 if (p->o_arg.seqid == NULL)
863 nfs_sb_active(dentry->d_sb);
864 p->dentry = dget(dentry);
867 atomic_inc(&sp->so_count);
868 p->o_arg.fh = NFS_FH(dir);
869 p->o_arg.open_flags = flags;
870 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
871 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
872 * will return permission denied for all bits until close */
873 if (!(flags & O_EXCL)) {
874 /* ask server to check for all possible rights as results
876 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
877 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
879 p->o_arg.clientid = server->nfs_client->cl_clientid;
880 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
881 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
882 p->o_arg.name = &dentry->d_name;
883 p->o_arg.server = server;
884 p->o_arg.bitmask = server->attr_bitmask;
885 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
886 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
887 if (attrs != NULL && attrs->ia_valid != 0) {
890 p->o_arg.u.attrs = &p->attrs;
891 memcpy(&p->attrs, attrs, sizeof(p->attrs));
894 verf[1] = current->pid;
895 memcpy(p->o_arg.u.verifier.data, verf,
896 sizeof(p->o_arg.u.verifier.data));
898 p->c_arg.fh = &p->o_res.fh;
899 p->c_arg.stateid = &p->o_res.stateid;
900 p->c_arg.seqid = p->o_arg.seqid;
901 nfs4_init_opendata_res(p);
911 static void nfs4_opendata_free(struct kref *kref)
913 struct nfs4_opendata *p = container_of(kref,
914 struct nfs4_opendata, kref);
915 struct super_block *sb = p->dentry->d_sb;
917 nfs_free_seqid(p->o_arg.seqid);
918 if (p->state != NULL)
919 nfs4_put_open_state(p->state);
920 nfs4_put_state_owner(p->owner);
924 nfs_fattr_free_names(&p->f_attr);
928 static void nfs4_opendata_put(struct nfs4_opendata *p)
931 kref_put(&p->kref, nfs4_opendata_free);
934 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
938 ret = rpc_wait_for_completion_task(task);
942 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
946 if (open_mode & (O_EXCL|O_TRUNC))
948 switch (mode & (FMODE_READ|FMODE_WRITE)) {
950 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
951 && state->n_rdonly != 0;
954 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
955 && state->n_wronly != 0;
957 case FMODE_READ|FMODE_WRITE:
958 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
959 && state->n_rdwr != 0;
965 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
967 if (delegation == NULL)
969 if ((delegation->type & fmode) != fmode)
971 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
973 nfs_mark_delegation_referenced(delegation);
977 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
986 case FMODE_READ|FMODE_WRITE:
989 nfs4_state_set_mode_locked(state, state->state | fmode);
992 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
994 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
995 nfs4_stateid_copy(&state->stateid, stateid);
996 nfs4_stateid_copy(&state->open_stateid, stateid);
999 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1002 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1004 case FMODE_READ|FMODE_WRITE:
1005 set_bit(NFS_O_RDWR_STATE, &state->flags);
1009 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1011 write_seqlock(&state->seqlock);
1012 nfs_set_open_stateid_locked(state, stateid, fmode);
1013 write_sequnlock(&state->seqlock);
1016 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1019 * Protect the call to nfs4_state_set_mode_locked and
1020 * serialise the stateid update
1022 write_seqlock(&state->seqlock);
1023 if (deleg_stateid != NULL) {
1024 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1025 set_bit(NFS_DELEGATED_STATE, &state->flags);
1027 if (open_stateid != NULL)
1028 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1029 write_sequnlock(&state->seqlock);
1030 spin_lock(&state->owner->so_lock);
1031 update_open_stateflags(state, fmode);
1032 spin_unlock(&state->owner->so_lock);
1035 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1037 struct nfs_inode *nfsi = NFS_I(state->inode);
1038 struct nfs_delegation *deleg_cur;
1041 fmode &= (FMODE_READ|FMODE_WRITE);
1044 deleg_cur = rcu_dereference(nfsi->delegation);
1045 if (deleg_cur == NULL)
1048 spin_lock(&deleg_cur->lock);
1049 if (nfsi->delegation != deleg_cur ||
1050 (deleg_cur->type & fmode) != fmode)
1051 goto no_delegation_unlock;
1053 if (delegation == NULL)
1054 delegation = &deleg_cur->stateid;
1055 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1056 goto no_delegation_unlock;
1058 nfs_mark_delegation_referenced(deleg_cur);
1059 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1061 no_delegation_unlock:
1062 spin_unlock(&deleg_cur->lock);
1066 if (!ret && open_stateid != NULL) {
1067 __update_open_stateid(state, open_stateid, NULL, fmode);
1075 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1077 struct nfs_delegation *delegation;
1080 delegation = rcu_dereference(NFS_I(inode)->delegation);
1081 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1086 nfs4_inode_return_delegation(inode);
1089 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1091 struct nfs4_state *state = opendata->state;
1092 struct nfs_inode *nfsi = NFS_I(state->inode);
1093 struct nfs_delegation *delegation;
1094 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1095 fmode_t fmode = opendata->o_arg.fmode;
1096 nfs4_stateid stateid;
1100 if (can_open_cached(state, fmode, open_mode)) {
1101 spin_lock(&state->owner->so_lock);
1102 if (can_open_cached(state, fmode, open_mode)) {
1103 update_open_stateflags(state, fmode);
1104 spin_unlock(&state->owner->so_lock);
1105 goto out_return_state;
1107 spin_unlock(&state->owner->so_lock);
1110 delegation = rcu_dereference(nfsi->delegation);
1111 if (!can_open_delegated(delegation, fmode)) {
1115 /* Save the delegation */
1116 nfs4_stateid_copy(&stateid, &delegation->stateid);
1118 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1123 /* Try to update the stateid using the delegation */
1124 if (update_open_stateid(state, NULL, &stateid, fmode))
1125 goto out_return_state;
1128 return ERR_PTR(ret);
1130 atomic_inc(&state->count);
1135 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1137 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1138 struct nfs_delegation *delegation;
1139 int delegation_flags = 0;
1142 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1144 delegation_flags = delegation->flags;
1146 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1147 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1148 "returning a delegation for "
1149 "OPEN(CLAIM_DELEGATE_CUR)\n",
1151 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1152 nfs_inode_set_delegation(state->inode,
1153 data->owner->so_cred,
1156 nfs_inode_reclaim_delegation(state->inode,
1157 data->owner->so_cred,
1162 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1163 * and update the nfs4_state.
1165 static struct nfs4_state *
1166 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1168 struct inode *inode = data->state->inode;
1169 struct nfs4_state *state = data->state;
1172 if (!data->rpc_done) {
1173 ret = data->rpc_status;
1178 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1179 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1180 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1184 state = nfs4_get_open_state(inode, data->owner);
1188 ret = nfs_refresh_inode(inode, &data->f_attr);
1192 if (data->o_res.delegation_type != 0)
1193 nfs4_opendata_check_deleg(data, state);
1194 update_open_stateid(state, &data->o_res.stateid, NULL,
1199 return ERR_PTR(ret);
1203 static struct nfs4_state *
1204 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1206 struct inode *inode;
1207 struct nfs4_state *state = NULL;
1210 if (!data->rpc_done) {
1211 state = nfs4_try_open_cached(data);
1216 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1218 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1219 ret = PTR_ERR(inode);
1223 state = nfs4_get_open_state(inode, data->owner);
1226 if (data->o_res.delegation_type != 0)
1227 nfs4_opendata_check_deleg(data, state);
1228 update_open_stateid(state, &data->o_res.stateid, NULL,
1236 return ERR_PTR(ret);
1239 static struct nfs4_state *
1240 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1242 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1243 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1244 return _nfs4_opendata_to_nfs4_state(data);
1247 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1249 struct nfs_inode *nfsi = NFS_I(state->inode);
1250 struct nfs_open_context *ctx;
1252 spin_lock(&state->inode->i_lock);
1253 list_for_each_entry(ctx, &nfsi->open_files, list) {
1254 if (ctx->state != state)
1256 get_nfs_open_context(ctx);
1257 spin_unlock(&state->inode->i_lock);
1260 spin_unlock(&state->inode->i_lock);
1261 return ERR_PTR(-ENOENT);
1264 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1266 struct nfs4_opendata *opendata;
1268 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1269 if (opendata == NULL)
1270 return ERR_PTR(-ENOMEM);
1271 opendata->state = state;
1272 atomic_inc(&state->count);
1276 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1278 struct nfs4_state *newstate;
1281 opendata->o_arg.open_flags = 0;
1282 opendata->o_arg.fmode = fmode;
1283 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1284 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1285 nfs4_init_opendata_res(opendata);
1286 ret = _nfs4_recover_proc_open(opendata);
1289 newstate = nfs4_opendata_to_nfs4_state(opendata);
1290 if (IS_ERR(newstate))
1291 return PTR_ERR(newstate);
1292 nfs4_close_state(newstate, fmode);
1297 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1299 struct nfs4_state *newstate;
1302 /* memory barrier prior to reading state->n_* */
1303 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1305 if (state->n_rdwr != 0) {
1306 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1307 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1310 if (newstate != state)
1313 if (state->n_wronly != 0) {
1314 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1315 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1318 if (newstate != state)
1321 if (state->n_rdonly != 0) {
1322 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1323 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1326 if (newstate != state)
1330 * We may have performed cached opens for all three recoveries.
1331 * Check if we need to update the current stateid.
1333 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1334 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1335 write_seqlock(&state->seqlock);
1336 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1337 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1338 write_sequnlock(&state->seqlock);
1345 * reclaim state on the server after a reboot.
1347 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1349 struct nfs_delegation *delegation;
1350 struct nfs4_opendata *opendata;
1351 fmode_t delegation_type = 0;
1354 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1355 if (IS_ERR(opendata))
1356 return PTR_ERR(opendata);
1357 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1358 opendata->o_arg.fh = NFS_FH(state->inode);
1360 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1361 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1362 delegation_type = delegation->type;
1364 opendata->o_arg.u.delegation_type = delegation_type;
1365 status = nfs4_open_recover(opendata, state);
1366 nfs4_opendata_put(opendata);
1370 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1372 struct nfs_server *server = NFS_SERVER(state->inode);
1373 struct nfs4_exception exception = { };
1376 err = _nfs4_do_open_reclaim(ctx, state);
1377 if (err != -NFS4ERR_DELAY)
1379 nfs4_handle_exception(server, err, &exception);
1380 } while (exception.retry);
1384 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1386 struct nfs_open_context *ctx;
1389 ctx = nfs4_state_find_open_context(state);
1391 return PTR_ERR(ctx);
1392 ret = nfs4_do_open_reclaim(ctx, state);
1393 put_nfs_open_context(ctx);
1397 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1399 struct nfs4_opendata *opendata;
1402 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1403 if (IS_ERR(opendata))
1404 return PTR_ERR(opendata);
1405 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1406 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1407 ret = nfs4_open_recover(opendata, state);
1408 nfs4_opendata_put(opendata);
1412 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1414 struct nfs4_exception exception = { };
1415 struct nfs_server *server = NFS_SERVER(state->inode);
1418 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1424 case -NFS4ERR_BADSESSION:
1425 case -NFS4ERR_BADSLOT:
1426 case -NFS4ERR_BAD_HIGH_SLOT:
1427 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1428 case -NFS4ERR_DEADSESSION:
1429 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1431 case -NFS4ERR_STALE_CLIENTID:
1432 case -NFS4ERR_STALE_STATEID:
1433 case -NFS4ERR_EXPIRED:
1434 /* Don't recall a delegation if it was lost */
1435 nfs4_schedule_lease_recovery(server->nfs_client);
1439 * The show must go on: exit, but mark the
1440 * stateid as needing recovery.
1442 case -NFS4ERR_DELEG_REVOKED:
1443 case -NFS4ERR_ADMIN_REVOKED:
1444 case -NFS4ERR_BAD_STATEID:
1445 nfs_inode_find_state_and_recover(state->inode,
1447 nfs4_schedule_stateid_recovery(server, state);
1450 * User RPCSEC_GSS context has expired.
1451 * We cannot recover this stateid now, so
1452 * skip it and allow recovery thread to
1459 err = nfs4_handle_exception(server, err, &exception);
1460 } while (exception.retry);
1465 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1467 struct nfs4_opendata *data = calldata;
1469 data->rpc_status = task->tk_status;
1470 if (data->rpc_status == 0) {
1471 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1472 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1473 renew_lease(data->o_res.server, data->timestamp);
1478 static void nfs4_open_confirm_release(void *calldata)
1480 struct nfs4_opendata *data = calldata;
1481 struct nfs4_state *state = NULL;
1483 /* If this request hasn't been cancelled, do nothing */
1484 if (data->cancelled == 0)
1486 /* In case of error, no cleanup! */
1487 if (!data->rpc_done)
1489 state = nfs4_opendata_to_nfs4_state(data);
1491 nfs4_close_state(state, data->o_arg.fmode);
1493 nfs4_opendata_put(data);
1496 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1497 .rpc_call_done = nfs4_open_confirm_done,
1498 .rpc_release = nfs4_open_confirm_release,
1502 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1504 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1506 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1507 struct rpc_task *task;
1508 struct rpc_message msg = {
1509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1510 .rpc_argp = &data->c_arg,
1511 .rpc_resp = &data->c_res,
1512 .rpc_cred = data->owner->so_cred,
1514 struct rpc_task_setup task_setup_data = {
1515 .rpc_client = server->client,
1516 .rpc_message = &msg,
1517 .callback_ops = &nfs4_open_confirm_ops,
1518 .callback_data = data,
1519 .workqueue = nfsiod_workqueue,
1520 .flags = RPC_TASK_ASYNC,
1524 kref_get(&data->kref);
1526 data->rpc_status = 0;
1527 data->timestamp = jiffies;
1528 task = rpc_run_task(&task_setup_data);
1530 return PTR_ERR(task);
1531 status = nfs4_wait_for_completion_rpc_task(task);
1533 data->cancelled = 1;
1536 status = data->rpc_status;
1541 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1543 struct nfs4_opendata *data = calldata;
1544 struct nfs4_state_owner *sp = data->owner;
1546 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1549 * Check if we still need to send an OPEN call, or if we can use
1550 * a delegation instead.
1552 if (data->state != NULL) {
1553 struct nfs_delegation *delegation;
1555 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1558 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1559 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1560 can_open_delegated(delegation, data->o_arg.fmode))
1561 goto unlock_no_action;
1564 /* Update client id. */
1565 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1566 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1567 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1568 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1569 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1571 data->timestamp = jiffies;
1572 if (nfs4_setup_sequence(data->o_arg.server,
1573 &data->o_arg.seq_args,
1574 &data->o_res.seq_res,
1576 nfs_release_seqid(data->o_arg.seqid);
1578 rpc_call_start(task);
1583 task->tk_action = NULL;
1587 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1589 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1590 nfs4_open_prepare(task, calldata);
1593 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1595 struct nfs4_opendata *data = calldata;
1597 data->rpc_status = task->tk_status;
1599 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1602 if (task->tk_status == 0) {
1603 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1604 switch (data->o_res.f_attr->mode & S_IFMT) {
1608 data->rpc_status = -ELOOP;
1611 data->rpc_status = -EISDIR;
1614 data->rpc_status = -ENOTDIR;
1617 renew_lease(data->o_res.server, data->timestamp);
1618 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1619 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1624 static void nfs4_open_release(void *calldata)
1626 struct nfs4_opendata *data = calldata;
1627 struct nfs4_state *state = NULL;
1629 /* If this request hasn't been cancelled, do nothing */
1630 if (data->cancelled == 0)
1632 /* In case of error, no cleanup! */
1633 if (data->rpc_status != 0 || !data->rpc_done)
1635 /* In case we need an open_confirm, no cleanup! */
1636 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1638 state = nfs4_opendata_to_nfs4_state(data);
1640 nfs4_close_state(state, data->o_arg.fmode);
1642 nfs4_opendata_put(data);
1645 static const struct rpc_call_ops nfs4_open_ops = {
1646 .rpc_call_prepare = nfs4_open_prepare,
1647 .rpc_call_done = nfs4_open_done,
1648 .rpc_release = nfs4_open_release,
1651 static const struct rpc_call_ops nfs4_recover_open_ops = {
1652 .rpc_call_prepare = nfs4_recover_open_prepare,
1653 .rpc_call_done = nfs4_open_done,
1654 .rpc_release = nfs4_open_release,
1657 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1659 struct inode *dir = data->dir->d_inode;
1660 struct nfs_server *server = NFS_SERVER(dir);
1661 struct nfs_openargs *o_arg = &data->o_arg;
1662 struct nfs_openres *o_res = &data->o_res;
1663 struct rpc_task *task;
1664 struct rpc_message msg = {
1665 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1668 .rpc_cred = data->owner->so_cred,
1670 struct rpc_task_setup task_setup_data = {
1671 .rpc_client = server->client,
1672 .rpc_message = &msg,
1673 .callback_ops = &nfs4_open_ops,
1674 .callback_data = data,
1675 .workqueue = nfsiod_workqueue,
1676 .flags = RPC_TASK_ASYNC,
1680 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1681 kref_get(&data->kref);
1683 data->rpc_status = 0;
1684 data->cancelled = 0;
1686 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1687 task = rpc_run_task(&task_setup_data);
1689 return PTR_ERR(task);
1690 status = nfs4_wait_for_completion_rpc_task(task);
1692 data->cancelled = 1;
1695 status = data->rpc_status;
1701 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1703 struct inode *dir = data->dir->d_inode;
1704 struct nfs_openres *o_res = &data->o_res;
1707 status = nfs4_run_open_task(data, 1);
1708 if (status != 0 || !data->rpc_done)
1711 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1713 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1714 status = _nfs4_proc_open_confirm(data);
1722 static int nfs4_opendata_access(struct rpc_cred *cred,
1723 struct nfs4_opendata *opendata,
1724 struct nfs4_state *state, fmode_t fmode)
1726 struct nfs_access_entry cache;
1729 /* access call failed or for some reason the server doesn't
1730 * support any access modes -- defer access call until later */
1731 if (opendata->o_res.access_supported == 0)
1735 /* don't check MAY_WRITE - a newly created file may not have
1736 * write mode bits, but POSIX allows the creating process to write */
1737 if (fmode & FMODE_READ)
1739 if (fmode & FMODE_EXEC)
1743 cache.jiffies = jiffies;
1744 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1745 nfs_access_add_cache(state->inode, &cache);
1747 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1750 /* even though OPEN succeeded, access is denied. Close the file */
1751 nfs4_close_state(state, fmode);
1756 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1758 static int _nfs4_proc_open(struct nfs4_opendata *data)
1760 struct inode *dir = data->dir->d_inode;
1761 struct nfs_server *server = NFS_SERVER(dir);
1762 struct nfs_openargs *o_arg = &data->o_arg;
1763 struct nfs_openres *o_res = &data->o_res;
1766 status = nfs4_run_open_task(data, 0);
1767 if (!data->rpc_done)
1770 if (status == -NFS4ERR_BADNAME &&
1771 !(o_arg->open_flags & O_CREAT))
1776 nfs_fattr_map_and_free_names(server, &data->f_attr);
1778 if (o_arg->open_flags & O_CREAT)
1779 update_changeattr(dir, &o_res->cinfo);
1780 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1781 server->caps &= ~NFS_CAP_POSIX_LOCK;
1782 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1783 status = _nfs4_proc_open_confirm(data);
1787 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1788 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1792 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1797 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1798 ret = nfs4_wait_clnt_recover(clp);
1801 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1802 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1804 nfs4_schedule_state_manager(clp);
1810 static int nfs4_recover_expired_lease(struct nfs_server *server)
1812 return nfs4_client_recover_expired_lease(server->nfs_client);
1817 * reclaim state on the server after a network partition.
1818 * Assumes caller holds the appropriate lock
1820 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1822 struct nfs4_opendata *opendata;
1825 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1826 if (IS_ERR(opendata))
1827 return PTR_ERR(opendata);
1828 ret = nfs4_open_recover(opendata, state);
1830 d_drop(ctx->dentry);
1831 nfs4_opendata_put(opendata);
1835 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1837 struct nfs_server *server = NFS_SERVER(state->inode);
1838 struct nfs4_exception exception = { };
1842 err = _nfs4_open_expired(ctx, state);
1846 case -NFS4ERR_GRACE:
1847 case -NFS4ERR_DELAY:
1848 nfs4_handle_exception(server, err, &exception);
1851 } while (exception.retry);
1856 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1858 struct nfs_open_context *ctx;
1861 ctx = nfs4_state_find_open_context(state);
1863 return PTR_ERR(ctx);
1864 ret = nfs4_do_open_expired(ctx, state);
1865 put_nfs_open_context(ctx);
1869 #if defined(CONFIG_NFS_V4_1)
1870 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1872 struct nfs_server *server = NFS_SERVER(state->inode);
1873 nfs4_stateid *stateid = &state->stateid;
1876 /* If a state reset has been done, test_stateid is unneeded */
1877 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1880 status = nfs41_test_stateid(server, stateid);
1881 if (status != NFS_OK) {
1882 /* Free the stateid unless the server explicitly
1883 * informs us the stateid is unrecognized. */
1884 if (status != -NFS4ERR_BAD_STATEID)
1885 nfs41_free_stateid(server, stateid);
1886 nfs_remove_bad_delegation(state->inode);
1888 write_seqlock(&state->seqlock);
1889 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1890 write_sequnlock(&state->seqlock);
1891 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1896 * nfs41_check_open_stateid - possibly free an open stateid
1898 * @state: NFSv4 state for an inode
1900 * Returns NFS_OK if recovery for this stateid is now finished.
1901 * Otherwise a negative NFS4ERR value is returned.
1903 static int nfs41_check_open_stateid(struct nfs4_state *state)
1905 struct nfs_server *server = NFS_SERVER(state->inode);
1906 nfs4_stateid *stateid = &state->open_stateid;
1909 /* If a state reset has been done, test_stateid is unneeded */
1910 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1911 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1912 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1913 return -NFS4ERR_BAD_STATEID;
1915 status = nfs41_test_stateid(server, stateid);
1916 if (status != NFS_OK) {
1917 /* Free the stateid unless the server explicitly
1918 * informs us the stateid is unrecognized. */
1919 if (status != -NFS4ERR_BAD_STATEID)
1920 nfs41_free_stateid(server, stateid);
1922 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1923 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1924 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1929 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1933 nfs41_clear_delegation_stateid(state);
1934 status = nfs41_check_open_stateid(state);
1935 if (status != NFS_OK)
1936 status = nfs4_open_expired(sp, state);
1942 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1943 * fields corresponding to attributes that were used to store the verifier.
1944 * Make sure we clobber those fields in the later setattr call
1946 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1948 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1949 !(sattr->ia_valid & ATTR_ATIME_SET))
1950 sattr->ia_valid |= ATTR_ATIME;
1952 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1953 !(sattr->ia_valid & ATTR_MTIME_SET))
1954 sattr->ia_valid |= ATTR_MTIME;
1958 * Returns a referenced nfs4_state
1960 static int _nfs4_do_open(struct inode *dir,
1961 struct dentry *dentry,
1964 struct iattr *sattr,
1965 struct rpc_cred *cred,
1966 struct nfs4_state **res,
1967 struct nfs4_threshold **ctx_th)
1969 struct nfs4_state_owner *sp;
1970 struct nfs4_state *state = NULL;
1971 struct nfs_server *server = NFS_SERVER(dir);
1972 struct nfs4_opendata *opendata;
1975 /* Protect against reboot recovery conflicts */
1977 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1979 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1982 status = nfs4_recover_expired_lease(server);
1984 goto err_put_state_owner;
1985 if (dentry->d_inode != NULL)
1986 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1988 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1989 if (opendata == NULL)
1990 goto err_put_state_owner;
1992 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1993 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1994 if (!opendata->f_attr.mdsthreshold)
1995 goto err_opendata_put;
1996 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
1998 if (dentry->d_inode != NULL)
1999 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2001 status = _nfs4_proc_open(opendata);
2003 goto err_opendata_put;
2005 state = nfs4_opendata_to_nfs4_state(opendata);
2006 status = PTR_ERR(state);
2008 goto err_opendata_put;
2009 if (server->caps & NFS_CAP_POSIX_LOCK)
2010 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2012 status = nfs4_opendata_access(cred, opendata, state, fmode);
2014 goto err_opendata_put;
2016 if (opendata->o_arg.open_flags & O_EXCL) {
2017 nfs4_exclusive_attrset(opendata, sattr);
2019 nfs_fattr_init(opendata->o_res.f_attr);
2020 status = nfs4_do_setattr(state->inode, cred,
2021 opendata->o_res.f_attr, sattr,
2024 nfs_setattr_update_inode(state->inode, sattr);
2025 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2028 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2029 *ctx_th = opendata->f_attr.mdsthreshold;
2031 kfree(opendata->f_attr.mdsthreshold);
2032 opendata->f_attr.mdsthreshold = NULL;
2034 nfs4_opendata_put(opendata);
2035 nfs4_put_state_owner(sp);
2039 kfree(opendata->f_attr.mdsthreshold);
2040 nfs4_opendata_put(opendata);
2041 err_put_state_owner:
2042 nfs4_put_state_owner(sp);
2049 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2050 struct dentry *dentry,
2053 struct iattr *sattr,
2054 struct rpc_cred *cred,
2055 struct nfs4_threshold **ctx_th)
2057 struct nfs4_exception exception = { };
2058 struct nfs4_state *res;
2061 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
2063 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2067 /* NOTE: BAD_SEQID means the server and client disagree about the
2068 * book-keeping w.r.t. state-changing operations
2069 * (OPEN/CLOSE/LOCK/LOCKU...)
2070 * It is actually a sign of a bug on the client or on the server.
2072 * If we receive a BAD_SEQID error in the particular case of
2073 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2074 * have unhashed the old state_owner for us, and that we can
2075 * therefore safely retry using a new one. We should still warn
2076 * the user though...
2078 if (status == -NFS4ERR_BAD_SEQID) {
2079 pr_warn_ratelimited("NFS: v4 server %s "
2080 " returned a bad sequence-id error!\n",
2081 NFS_SERVER(dir)->nfs_client->cl_hostname);
2082 exception.retry = 1;
2086 * BAD_STATEID on OPEN means that the server cancelled our
2087 * state before it received the OPEN_CONFIRM.
2088 * Recover by retrying the request as per the discussion
2089 * on Page 181 of RFC3530.
2091 if (status == -NFS4ERR_BAD_STATEID) {
2092 exception.retry = 1;
2095 if (status == -EAGAIN) {
2096 /* We must have found a delegation */
2097 exception.retry = 1;
2100 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2101 status, &exception));
2102 } while (exception.retry);
2106 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2107 struct nfs_fattr *fattr, struct iattr *sattr,
2108 struct nfs4_state *state)
2110 struct nfs_server *server = NFS_SERVER(inode);
2111 struct nfs_setattrargs arg = {
2112 .fh = NFS_FH(inode),
2115 .bitmask = server->attr_bitmask,
2117 struct nfs_setattrres res = {
2121 struct rpc_message msg = {
2122 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2127 unsigned long timestamp = jiffies;
2130 nfs_fattr_init(fattr);
2132 if (state != NULL) {
2133 struct nfs_lockowner lockowner = {
2134 .l_owner = current->files,
2135 .l_pid = current->tgid,
2137 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2139 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2141 /* Use that stateid */
2143 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2145 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2146 if (status == 0 && state != NULL)
2147 renew_lease(server, timestamp);
2151 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2152 struct nfs_fattr *fattr, struct iattr *sattr,
2153 struct nfs4_state *state)
2155 struct nfs_server *server = NFS_SERVER(inode);
2156 struct nfs4_exception exception = {
2162 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2164 case -NFS4ERR_OPENMODE:
2165 if (state && !(state->state & FMODE_WRITE)) {
2167 if (sattr->ia_valid & ATTR_OPEN)
2172 err = nfs4_handle_exception(server, err, &exception);
2173 } while (exception.retry);
2178 struct nfs4_closedata {
2179 struct inode *inode;
2180 struct nfs4_state *state;
2181 struct nfs_closeargs arg;
2182 struct nfs_closeres res;
2183 struct nfs_fattr fattr;
2184 unsigned long timestamp;
2189 static void nfs4_free_closedata(void *data)
2191 struct nfs4_closedata *calldata = data;
2192 struct nfs4_state_owner *sp = calldata->state->owner;
2193 struct super_block *sb = calldata->state->inode->i_sb;
2196 pnfs_roc_release(calldata->state->inode);
2197 nfs4_put_open_state(calldata->state);
2198 nfs_free_seqid(calldata->arg.seqid);
2199 nfs4_put_state_owner(sp);
2200 nfs_sb_deactive_async(sb);
2204 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2207 spin_lock(&state->owner->so_lock);
2208 if (!(fmode & FMODE_READ))
2209 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2210 if (!(fmode & FMODE_WRITE))
2211 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2212 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2213 spin_unlock(&state->owner->so_lock);
2216 static void nfs4_close_done(struct rpc_task *task, void *data)
2218 struct nfs4_closedata *calldata = data;
2219 struct nfs4_state *state = calldata->state;
2220 struct nfs_server *server = NFS_SERVER(calldata->inode);
2222 dprintk("%s: begin!\n", __func__);
2223 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2225 /* hmm. we are done with the inode, and in the process of freeing
2226 * the state_owner. we keep this around to process errors
2228 switch (task->tk_status) {
2231 pnfs_roc_set_barrier(state->inode,
2232 calldata->roc_barrier);
2233 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2234 renew_lease(server, calldata->timestamp);
2235 nfs4_close_clear_stateid_flags(state,
2236 calldata->arg.fmode);
2238 case -NFS4ERR_STALE_STATEID:
2239 case -NFS4ERR_OLD_STATEID:
2240 case -NFS4ERR_BAD_STATEID:
2241 case -NFS4ERR_EXPIRED:
2242 if (calldata->arg.fmode == 0)
2245 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2246 rpc_restart_call_prepare(task);
2248 nfs_release_seqid(calldata->arg.seqid);
2249 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2250 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2253 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2255 struct nfs4_closedata *calldata = data;
2256 struct nfs4_state *state = calldata->state;
2257 struct inode *inode = calldata->inode;
2260 dprintk("%s: begin!\n", __func__);
2261 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2264 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2265 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2266 spin_lock(&state->owner->so_lock);
2267 /* Calculate the change in open mode */
2268 if (state->n_rdwr == 0) {
2269 if (state->n_rdonly == 0) {
2270 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2271 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2272 calldata->arg.fmode &= ~FMODE_READ;
2274 if (state->n_wronly == 0) {
2275 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2276 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2277 calldata->arg.fmode &= ~FMODE_WRITE;
2280 spin_unlock(&state->owner->so_lock);
2283 /* Note: exit _without_ calling nfs4_close_done */
2284 task->tk_action = NULL;
2288 if (calldata->arg.fmode == 0) {
2289 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2290 if (calldata->roc &&
2291 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
2295 nfs_fattr_init(calldata->res.fattr);
2296 calldata->timestamp = jiffies;
2297 if (nfs4_setup_sequence(NFS_SERVER(inode),
2298 &calldata->arg.seq_args,
2299 &calldata->res.seq_res,
2301 nfs_release_seqid(calldata->arg.seqid);
2303 rpc_call_start(task);
2305 dprintk("%s: done!\n", __func__);
2308 static const struct rpc_call_ops nfs4_close_ops = {
2309 .rpc_call_prepare = nfs4_close_prepare,
2310 .rpc_call_done = nfs4_close_done,
2311 .rpc_release = nfs4_free_closedata,
2315 * It is possible for data to be read/written from a mem-mapped file
2316 * after the sys_close call (which hits the vfs layer as a flush).
2317 * This means that we can't safely call nfsv4 close on a file until
2318 * the inode is cleared. This in turn means that we are not good
2319 * NFSv4 citizens - we do not indicate to the server to update the file's
2320 * share state even when we are done with one of the three share
2321 * stateid's in the inode.
2323 * NOTE: Caller must be holding the sp->so_owner semaphore!
2325 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2327 struct nfs_server *server = NFS_SERVER(state->inode);
2328 struct nfs4_closedata *calldata;
2329 struct nfs4_state_owner *sp = state->owner;
2330 struct rpc_task *task;
2331 struct rpc_message msg = {
2332 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2333 .rpc_cred = state->owner->so_cred,
2335 struct rpc_task_setup task_setup_data = {
2336 .rpc_client = server->client,
2337 .rpc_message = &msg,
2338 .callback_ops = &nfs4_close_ops,
2339 .workqueue = nfsiod_workqueue,
2340 .flags = RPC_TASK_ASYNC,
2342 int status = -ENOMEM;
2344 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2345 if (calldata == NULL)
2347 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2348 calldata->inode = state->inode;
2349 calldata->state = state;
2350 calldata->arg.fh = NFS_FH(state->inode);
2351 calldata->arg.stateid = &state->open_stateid;
2352 /* Serialization for the sequence id */
2353 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2354 if (calldata->arg.seqid == NULL)
2355 goto out_free_calldata;
2356 calldata->arg.fmode = 0;
2357 calldata->arg.bitmask = server->cache_consistency_bitmask;
2358 calldata->res.fattr = &calldata->fattr;
2359 calldata->res.seqid = calldata->arg.seqid;
2360 calldata->res.server = server;
2361 calldata->roc = pnfs_roc(state->inode);
2362 nfs_sb_active(calldata->inode->i_sb);
2364 msg.rpc_argp = &calldata->arg;
2365 msg.rpc_resp = &calldata->res;
2366 task_setup_data.callback_data = calldata;
2367 task = rpc_run_task(&task_setup_data);
2369 return PTR_ERR(task);
2372 status = rpc_wait_for_completion_task(task);
2378 nfs4_put_open_state(state);
2379 nfs4_put_state_owner(sp);
2383 static struct inode *
2384 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2386 struct nfs4_state *state;
2388 /* Protect against concurrent sillydeletes */
2389 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2390 ctx->cred, &ctx->mdsthreshold);
2392 return ERR_CAST(state);
2394 return igrab(state->inode);
2397 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2399 if (ctx->state == NULL)
2402 nfs4_close_sync(ctx->state, ctx->mode);
2404 nfs4_close_state(ctx->state, ctx->mode);
2407 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2409 struct nfs4_server_caps_arg args = {
2412 struct nfs4_server_caps_res res = {};
2413 struct rpc_message msg = {
2414 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2420 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2422 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2423 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2424 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2425 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2426 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2427 NFS_CAP_CTIME|NFS_CAP_MTIME);
2428 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2429 server->caps |= NFS_CAP_ACLS;
2430 if (res.has_links != 0)
2431 server->caps |= NFS_CAP_HARDLINKS;
2432 if (res.has_symlinks != 0)
2433 server->caps |= NFS_CAP_SYMLINKS;
2434 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2435 server->caps |= NFS_CAP_FILEID;
2436 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2437 server->caps |= NFS_CAP_MODE;
2438 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2439 server->caps |= NFS_CAP_NLINK;
2440 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2441 server->caps |= NFS_CAP_OWNER;
2442 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2443 server->caps |= NFS_CAP_OWNER_GROUP;
2444 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2445 server->caps |= NFS_CAP_ATIME;
2446 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2447 server->caps |= NFS_CAP_CTIME;
2448 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2449 server->caps |= NFS_CAP_MTIME;
2451 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2452 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2453 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2454 server->acl_bitmask = res.acl_bitmask;
2455 server->fh_expire_type = res.fh_expire_type;
2461 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2463 struct nfs4_exception exception = { };
2466 err = nfs4_handle_exception(server,
2467 _nfs4_server_capabilities(server, fhandle),
2469 } while (exception.retry);
2473 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2474 struct nfs_fsinfo *info)
2476 struct nfs4_lookup_root_arg args = {
2477 .bitmask = nfs4_fattr_bitmap,
2479 struct nfs4_lookup_res res = {
2481 .fattr = info->fattr,
2484 struct rpc_message msg = {
2485 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2490 nfs_fattr_init(info->fattr);
2491 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2494 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2495 struct nfs_fsinfo *info)
2497 struct nfs4_exception exception = { };
2500 err = _nfs4_lookup_root(server, fhandle, info);
2503 case -NFS4ERR_WRONGSEC:
2506 err = nfs4_handle_exception(server, err, &exception);
2508 } while (exception.retry);
2513 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2514 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2516 struct rpc_auth *auth;
2519 auth = rpcauth_create(flavor, server->client);
2524 ret = nfs4_lookup_root(server, fhandle, info);
2529 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2530 struct nfs_fsinfo *info)
2532 int i, len, status = 0;
2533 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2535 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2538 for (i = 0; i < len; i++) {
2539 /* AUTH_UNIX is the default flavor if none was specified,
2540 * thus has already been tried. */
2541 if (flav_array[i] == RPC_AUTH_UNIX)
2544 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2545 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2550 * -EACCESS could mean that the user doesn't have correct permissions
2551 * to access the mount. It could also mean that we tried to mount
2552 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2553 * existing mount programs don't handle -EACCES very well so it should
2554 * be mapped to -EPERM instead.
2556 if (status == -EACCES)
2562 * get the file handle for the "/" directory on the server
2564 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2565 struct nfs_fsinfo *info)
2567 int minor_version = server->nfs_client->cl_minorversion;
2568 int status = nfs4_lookup_root(server, fhandle, info);
2569 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2571 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2572 * by nfs4_map_errors() as this function exits.
2574 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2576 status = nfs4_server_capabilities(server, fhandle);
2578 status = nfs4_do_fsinfo(server, fhandle, info);
2579 return nfs4_map_errors(status);
2582 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2583 struct nfs_fsinfo *info)
2586 struct nfs_fattr *fattr = info->fattr;
2588 error = nfs4_server_capabilities(server, mntfh);
2590 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2594 error = nfs4_proc_getattr(server, mntfh, fattr);
2596 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2600 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2601 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2602 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2608 * Get locations and (maybe) other attributes of a referral.
2609 * Note that we'll actually follow the referral later when
2610 * we detect fsid mismatch in inode revalidation
2612 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2613 const struct qstr *name, struct nfs_fattr *fattr,
2614 struct nfs_fh *fhandle)
2616 int status = -ENOMEM;
2617 struct page *page = NULL;
2618 struct nfs4_fs_locations *locations = NULL;
2620 page = alloc_page(GFP_KERNEL);
2623 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2624 if (locations == NULL)
2627 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2630 /* Make sure server returned a different fsid for the referral */
2631 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2632 dprintk("%s: server did not return a different fsid for"
2633 " a referral at %s\n", __func__, name->name);
2637 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2638 nfs_fixup_referral_attributes(&locations->fattr);
2640 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2641 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2642 memset(fhandle, 0, sizeof(struct nfs_fh));
2650 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2652 struct nfs4_getattr_arg args = {
2654 .bitmask = server->attr_bitmask,
2656 struct nfs4_getattr_res res = {
2660 struct rpc_message msg = {
2661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2666 nfs_fattr_init(fattr);
2667 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2670 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2672 struct nfs4_exception exception = { };
2675 err = nfs4_handle_exception(server,
2676 _nfs4_proc_getattr(server, fhandle, fattr),
2678 } while (exception.retry);
2683 * The file is not closed if it is opened due to the a request to change
2684 * the size of the file. The open call will not be needed once the
2685 * VFS layer lookup-intents are implemented.
2687 * Close is called when the inode is destroyed.
2688 * If we haven't opened the file for O_WRONLY, we
2689 * need to in the size_change case to obtain a stateid.
2692 * Because OPEN is always done by name in nfsv4, it is
2693 * possible that we opened a different file by the same
2694 * name. We can recognize this race condition, but we
2695 * can't do anything about it besides returning an error.
2697 * This will be fixed with VFS changes (lookup-intent).
2700 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2701 struct iattr *sattr)
2703 struct inode *inode = dentry->d_inode;
2704 struct rpc_cred *cred = NULL;
2705 struct nfs4_state *state = NULL;
2708 if (pnfs_ld_layoutret_on_setattr(inode))
2709 pnfs_return_layout(inode);
2711 nfs_fattr_init(fattr);
2713 /* Deal with open(O_TRUNC) */
2714 if (sattr->ia_valid & ATTR_OPEN)
2715 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2717 /* Optimization: if the end result is no change, don't RPC */
2718 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2721 /* Search for an existing open(O_WRITE) file */
2722 if (sattr->ia_valid & ATTR_FILE) {
2723 struct nfs_open_context *ctx;
2725 ctx = nfs_file_open_context(sattr->ia_file);
2732 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2734 nfs_setattr_update_inode(inode, sattr);
2738 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2739 const struct qstr *name, struct nfs_fh *fhandle,
2740 struct nfs_fattr *fattr)
2742 struct nfs_server *server = NFS_SERVER(dir);
2744 struct nfs4_lookup_arg args = {
2745 .bitmask = server->attr_bitmask,
2746 .dir_fh = NFS_FH(dir),
2749 struct nfs4_lookup_res res = {
2754 struct rpc_message msg = {
2755 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2760 nfs_fattr_init(fattr);
2762 dprintk("NFS call lookup %s\n", name->name);
2763 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2764 dprintk("NFS reply lookup: %d\n", status);
2768 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2770 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2771 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2772 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2776 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2777 struct qstr *name, struct nfs_fh *fhandle,
2778 struct nfs_fattr *fattr)
2780 struct nfs4_exception exception = { };
2781 struct rpc_clnt *client = *clnt;
2784 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2786 case -NFS4ERR_BADNAME:
2789 case -NFS4ERR_MOVED:
2790 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2792 case -NFS4ERR_WRONGSEC:
2794 if (client != *clnt)
2797 client = nfs4_create_sec_client(client, dir, name);
2799 return PTR_ERR(client);
2801 exception.retry = 1;
2804 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2806 } while (exception.retry);
2811 else if (client != *clnt)
2812 rpc_shutdown_client(client);
2817 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2818 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2821 struct rpc_clnt *client = NFS_CLIENT(dir);
2823 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2824 if (client != NFS_CLIENT(dir)) {
2825 rpc_shutdown_client(client);
2826 nfs_fixup_secinfo_attributes(fattr);
2832 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2833 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2836 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2838 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2840 rpc_shutdown_client(client);
2841 return ERR_PTR(status);
2846 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2848 struct nfs_server *server = NFS_SERVER(inode);
2849 struct nfs4_accessargs args = {
2850 .fh = NFS_FH(inode),
2851 .bitmask = server->cache_consistency_bitmask,
2853 struct nfs4_accessres res = {
2856 struct rpc_message msg = {
2857 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2860 .rpc_cred = entry->cred,
2862 int mode = entry->mask;
2866 * Determine which access bits we want to ask for...
2868 if (mode & MAY_READ)
2869 args.access |= NFS4_ACCESS_READ;
2870 if (S_ISDIR(inode->i_mode)) {
2871 if (mode & MAY_WRITE)
2872 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2873 if (mode & MAY_EXEC)
2874 args.access |= NFS4_ACCESS_LOOKUP;
2876 if (mode & MAY_WRITE)
2877 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2878 if (mode & MAY_EXEC)
2879 args.access |= NFS4_ACCESS_EXECUTE;
2882 res.fattr = nfs_alloc_fattr();
2883 if (res.fattr == NULL)
2886 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2888 nfs_access_set_mask(entry, res.access);
2889 nfs_refresh_inode(inode, res.fattr);
2891 nfs_free_fattr(res.fattr);
2895 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2897 struct nfs4_exception exception = { };
2900 err = nfs4_handle_exception(NFS_SERVER(inode),
2901 _nfs4_proc_access(inode, entry),
2903 } while (exception.retry);
2908 * TODO: For the time being, we don't try to get any attributes
2909 * along with any of the zero-copy operations READ, READDIR,
2912 * In the case of the first three, we want to put the GETATTR
2913 * after the read-type operation -- this is because it is hard
2914 * to predict the length of a GETATTR response in v4, and thus
2915 * align the READ data correctly. This means that the GETATTR
2916 * may end up partially falling into the page cache, and we should
2917 * shift it into the 'tail' of the xdr_buf before processing.
2918 * To do this efficiently, we need to know the total length
2919 * of data received, which doesn't seem to be available outside
2922 * In the case of WRITE, we also want to put the GETATTR after
2923 * the operation -- in this case because we want to make sure
2924 * we get the post-operation mtime and size.
2926 * Both of these changes to the XDR layer would in fact be quite
2927 * minor, but I decided to leave them for a subsequent patch.
2929 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2930 unsigned int pgbase, unsigned int pglen)
2932 struct nfs4_readlink args = {
2933 .fh = NFS_FH(inode),
2938 struct nfs4_readlink_res res;
2939 struct rpc_message msg = {
2940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2945 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2948 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2949 unsigned int pgbase, unsigned int pglen)
2951 struct nfs4_exception exception = { };
2954 err = nfs4_handle_exception(NFS_SERVER(inode),
2955 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2957 } while (exception.retry);
2962 * This is just for mknod. open(O_CREAT) will always do ->open_context().
2965 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2968 struct nfs_open_context *ctx;
2969 struct nfs4_state *state;
2972 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2974 return PTR_ERR(ctx);
2976 sattr->ia_mode &= ~current_umask();
2977 state = nfs4_do_open(dir, dentry, ctx->mode,
2978 flags, sattr, ctx->cred,
2979 &ctx->mdsthreshold);
2981 if (IS_ERR(state)) {
2982 status = PTR_ERR(state);
2985 d_add(dentry, igrab(state->inode));
2986 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2989 put_nfs_open_context(ctx);
2993 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2995 struct nfs_server *server = NFS_SERVER(dir);
2996 struct nfs_removeargs args = {
3000 struct nfs_removeres res = {
3003 struct rpc_message msg = {
3004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3010 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3012 update_changeattr(dir, &res.cinfo);
3016 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3018 struct nfs4_exception exception = { };
3021 err = nfs4_handle_exception(NFS_SERVER(dir),
3022 _nfs4_proc_remove(dir, name),
3024 } while (exception.retry);
3028 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3030 struct nfs_server *server = NFS_SERVER(dir);
3031 struct nfs_removeargs *args = msg->rpc_argp;
3032 struct nfs_removeres *res = msg->rpc_resp;
3034 res->server = server;
3035 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3036 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
3039 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3041 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
3042 &data->args.seq_args,
3046 rpc_call_start(task);
3049 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3051 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3053 if (!nfs4_sequence_done(task, &res->seq_res))
3055 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3057 update_changeattr(dir, &res->cinfo);
3061 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3063 struct nfs_server *server = NFS_SERVER(dir);
3064 struct nfs_renameargs *arg = msg->rpc_argp;
3065 struct nfs_renameres *res = msg->rpc_resp;
3067 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3068 res->server = server;
3069 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
3072 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3074 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3075 &data->args.seq_args,
3079 rpc_call_start(task);
3082 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3083 struct inode *new_dir)
3085 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3087 if (!nfs4_sequence_done(task, &res->seq_res))
3089 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3092 update_changeattr(old_dir, &res->old_cinfo);
3093 update_changeattr(new_dir, &res->new_cinfo);
3097 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3098 struct inode *new_dir, struct qstr *new_name)
3100 struct nfs_server *server = NFS_SERVER(old_dir);
3101 struct nfs_renameargs arg = {
3102 .old_dir = NFS_FH(old_dir),
3103 .new_dir = NFS_FH(new_dir),
3104 .old_name = old_name,
3105 .new_name = new_name,
3107 struct nfs_renameres res = {
3110 struct rpc_message msg = {
3111 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3115 int status = -ENOMEM;
3117 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3119 update_changeattr(old_dir, &res.old_cinfo);
3120 update_changeattr(new_dir, &res.new_cinfo);
3125 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3126 struct inode *new_dir, struct qstr *new_name)
3128 struct nfs4_exception exception = { };
3131 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3132 _nfs4_proc_rename(old_dir, old_name,
3135 } while (exception.retry);
3139 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3141 struct nfs_server *server = NFS_SERVER(inode);
3142 struct nfs4_link_arg arg = {
3143 .fh = NFS_FH(inode),
3144 .dir_fh = NFS_FH(dir),
3146 .bitmask = server->attr_bitmask,
3148 struct nfs4_link_res res = {
3151 struct rpc_message msg = {
3152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3156 int status = -ENOMEM;
3158 res.fattr = nfs_alloc_fattr();
3159 if (res.fattr == NULL)
3162 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3164 update_changeattr(dir, &res.cinfo);
3165 nfs_post_op_update_inode(inode, res.fattr);
3168 nfs_free_fattr(res.fattr);
3172 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3174 struct nfs4_exception exception = { };
3177 err = nfs4_handle_exception(NFS_SERVER(inode),
3178 _nfs4_proc_link(inode, dir, name),
3180 } while (exception.retry);
3184 struct nfs4_createdata {
3185 struct rpc_message msg;
3186 struct nfs4_create_arg arg;
3187 struct nfs4_create_res res;
3189 struct nfs_fattr fattr;
3192 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3193 struct qstr *name, struct iattr *sattr, u32 ftype)
3195 struct nfs4_createdata *data;
3197 data = kzalloc(sizeof(*data), GFP_KERNEL);
3199 struct nfs_server *server = NFS_SERVER(dir);
3201 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3202 data->msg.rpc_argp = &data->arg;
3203 data->msg.rpc_resp = &data->res;
3204 data->arg.dir_fh = NFS_FH(dir);
3205 data->arg.server = server;
3206 data->arg.name = name;
3207 data->arg.attrs = sattr;
3208 data->arg.ftype = ftype;
3209 data->arg.bitmask = server->attr_bitmask;
3210 data->res.server = server;
3211 data->res.fh = &data->fh;
3212 data->res.fattr = &data->fattr;
3213 nfs_fattr_init(data->res.fattr);
3218 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3220 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3221 &data->arg.seq_args, &data->res.seq_res, 1);
3223 update_changeattr(dir, &data->res.dir_cinfo);
3224 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3229 static void nfs4_free_createdata(struct nfs4_createdata *data)
3234 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3235 struct page *page, unsigned int len, struct iattr *sattr)
3237 struct nfs4_createdata *data;
3238 int status = -ENAMETOOLONG;
3240 if (len > NFS4_MAXPATHLEN)
3244 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3248 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3249 data->arg.u.symlink.pages = &page;
3250 data->arg.u.symlink.len = len;
3252 status = nfs4_do_create(dir, dentry, data);
3254 nfs4_free_createdata(data);
3259 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3260 struct page *page, unsigned int len, struct iattr *sattr)
3262 struct nfs4_exception exception = { };
3265 err = nfs4_handle_exception(NFS_SERVER(dir),
3266 _nfs4_proc_symlink(dir, dentry, page,
3269 } while (exception.retry);
3273 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3274 struct iattr *sattr)
3276 struct nfs4_createdata *data;
3277 int status = -ENOMEM;
3279 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3283 status = nfs4_do_create(dir, dentry, data);
3285 nfs4_free_createdata(data);
3290 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3291 struct iattr *sattr)
3293 struct nfs4_exception exception = { };
3296 sattr->ia_mode &= ~current_umask();
3298 err = nfs4_handle_exception(NFS_SERVER(dir),
3299 _nfs4_proc_mkdir(dir, dentry, sattr),
3301 } while (exception.retry);
3305 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3306 u64 cookie, struct page **pages, unsigned int count, int plus)
3308 struct inode *dir = dentry->d_inode;
3309 struct nfs4_readdir_arg args = {
3314 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3317 struct nfs4_readdir_res res;
3318 struct rpc_message msg = {
3319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3326 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3327 dentry->d_parent->d_name.name,
3328 dentry->d_name.name,
3329 (unsigned long long)cookie);
3330 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3331 res.pgbase = args.pgbase;
3332 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3334 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3335 status += args.pgbase;
3338 nfs_invalidate_atime(dir);
3340 dprintk("%s: returns %d\n", __func__, status);
3344 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3345 u64 cookie, struct page **pages, unsigned int count, int plus)
3347 struct nfs4_exception exception = { };
3350 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3351 _nfs4_proc_readdir(dentry, cred, cookie,
3352 pages, count, plus),
3354 } while (exception.retry);
3358 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3359 struct iattr *sattr, dev_t rdev)
3361 struct nfs4_createdata *data;
3362 int mode = sattr->ia_mode;
3363 int status = -ENOMEM;
3365 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3366 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3368 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3373 data->arg.ftype = NF4FIFO;
3374 else if (S_ISBLK(mode)) {
3375 data->arg.ftype = NF4BLK;
3376 data->arg.u.device.specdata1 = MAJOR(rdev);
3377 data->arg.u.device.specdata2 = MINOR(rdev);
3379 else if (S_ISCHR(mode)) {
3380 data->arg.ftype = NF4CHR;
3381 data->arg.u.device.specdata1 = MAJOR(rdev);
3382 data->arg.u.device.specdata2 = MINOR(rdev);
3385 status = nfs4_do_create(dir, dentry, data);
3387 nfs4_free_createdata(data);
3392 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3393 struct iattr *sattr, dev_t rdev)
3395 struct nfs4_exception exception = { };
3398 sattr->ia_mode &= ~current_umask();
3400 err = nfs4_handle_exception(NFS_SERVER(dir),
3401 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3403 } while (exception.retry);
3407 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3408 struct nfs_fsstat *fsstat)
3410 struct nfs4_statfs_arg args = {
3412 .bitmask = server->attr_bitmask,
3414 struct nfs4_statfs_res res = {
3417 struct rpc_message msg = {
3418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3423 nfs_fattr_init(fsstat->fattr);
3424 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3427 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3429 struct nfs4_exception exception = { };
3432 err = nfs4_handle_exception(server,
3433 _nfs4_proc_statfs(server, fhandle, fsstat),
3435 } while (exception.retry);
3439 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3440 struct nfs_fsinfo *fsinfo)
3442 struct nfs4_fsinfo_arg args = {
3444 .bitmask = server->attr_bitmask,
3446 struct nfs4_fsinfo_res res = {
3449 struct rpc_message msg = {
3450 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3455 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3458 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3460 struct nfs4_exception exception = { };
3464 err = nfs4_handle_exception(server,
3465 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3467 } while (exception.retry);
3471 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3475 nfs_fattr_init(fsinfo->fattr);
3476 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3478 /* block layout checks this! */
3479 server->pnfs_blksize = fsinfo->blksize;
3480 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3486 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3487 struct nfs_pathconf *pathconf)
3489 struct nfs4_pathconf_arg args = {
3491 .bitmask = server->attr_bitmask,
3493 struct nfs4_pathconf_res res = {
3494 .pathconf = pathconf,
3496 struct rpc_message msg = {
3497 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3502 /* None of the pathconf attributes are mandatory to implement */
3503 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3504 memset(pathconf, 0, sizeof(*pathconf));
3508 nfs_fattr_init(pathconf->fattr);
3509 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3512 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3513 struct nfs_pathconf *pathconf)
3515 struct nfs4_exception exception = { };
3519 err = nfs4_handle_exception(server,
3520 _nfs4_proc_pathconf(server, fhandle, pathconf),
3522 } while (exception.retry);
3526 void __nfs4_read_done_cb(struct nfs_read_data *data)
3528 nfs_invalidate_atime(data->header->inode);
3531 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3533 struct nfs_server *server = NFS_SERVER(data->header->inode);
3535 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3536 rpc_restart_call_prepare(task);
3540 __nfs4_read_done_cb(data);
3541 if (task->tk_status > 0)
3542 renew_lease(server, data->timestamp);
3546 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3549 dprintk("--> %s\n", __func__);
3551 if (!nfs4_sequence_done(task, &data->res.seq_res))
3554 return data->read_done_cb ? data->read_done_cb(task, data) :
3555 nfs4_read_done_cb(task, data);
3558 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3560 data->timestamp = jiffies;
3561 data->read_done_cb = nfs4_read_done_cb;
3562 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3563 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3566 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3568 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3569 &data->args.seq_args,
3573 rpc_call_start(task);
3576 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3578 struct inode *inode = data->header->inode;
3580 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3581 rpc_restart_call_prepare(task);
3584 if (task->tk_status >= 0) {
3585 renew_lease(NFS_SERVER(inode), data->timestamp);
3586 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3591 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3593 if (!nfs4_sequence_done(task, &data->res.seq_res))
3595 return data->write_done_cb ? data->write_done_cb(task, data) :
3596 nfs4_write_done_cb(task, data);
3600 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3602 const struct nfs_pgio_header *hdr = data->header;
3604 /* Don't request attributes for pNFS or O_DIRECT writes */
3605 if (data->ds_clp != NULL || hdr->dreq != NULL)
3607 /* Otherwise, request attributes if and only if we don't hold
3610 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3613 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3615 struct nfs_server *server = NFS_SERVER(data->header->inode);
3617 if (!nfs4_write_need_cache_consistency_data(data)) {
3618 data->args.bitmask = NULL;
3619 data->res.fattr = NULL;
3621 data->args.bitmask = server->cache_consistency_bitmask;
3623 if (!data->write_done_cb)
3624 data->write_done_cb = nfs4_write_done_cb;
3625 data->res.server = server;
3626 data->timestamp = jiffies;
3628 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3629 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3632 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3634 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3635 &data->args.seq_args,
3639 rpc_call_start(task);
3642 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3644 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3645 &data->args.seq_args,
3649 rpc_call_start(task);
3652 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3654 struct inode *inode = data->inode;
3656 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3657 rpc_restart_call_prepare(task);
3663 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3665 if (!nfs4_sequence_done(task, &data->res.seq_res))
3667 return data->commit_done_cb(task, data);
3670 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3672 struct nfs_server *server = NFS_SERVER(data->inode);
3674 if (data->commit_done_cb == NULL)
3675 data->commit_done_cb = nfs4_commit_done_cb;
3676 data->res.server = server;
3677 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3678 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3681 struct nfs4_renewdata {
3682 struct nfs_client *client;
3683 unsigned long timestamp;
3687 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3688 * standalone procedure for queueing an asynchronous RENEW.
3690 static void nfs4_renew_release(void *calldata)
3692 struct nfs4_renewdata *data = calldata;
3693 struct nfs_client *clp = data->client;
3695 if (atomic_read(&clp->cl_count) > 1)
3696 nfs4_schedule_state_renewal(clp);
3697 nfs_put_client(clp);
3701 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3703 struct nfs4_renewdata *data = calldata;
3704 struct nfs_client *clp = data->client;
3705 unsigned long timestamp = data->timestamp;
3707 if (task->tk_status < 0) {
3708 /* Unless we're shutting down, schedule state recovery! */
3709 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3711 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3712 nfs4_schedule_lease_recovery(clp);
3715 nfs4_schedule_path_down_recovery(clp);
3717 do_renew_lease(clp, timestamp);
3720 static const struct rpc_call_ops nfs4_renew_ops = {
3721 .rpc_call_done = nfs4_renew_done,
3722 .rpc_release = nfs4_renew_release,
3725 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3727 struct rpc_message msg = {
3728 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3732 struct nfs4_renewdata *data;
3734 if (renew_flags == 0)
3736 if (!atomic_inc_not_zero(&clp->cl_count))
3738 data = kmalloc(sizeof(*data), GFP_NOFS);
3742 data->timestamp = jiffies;
3743 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3744 &nfs4_renew_ops, data);
3747 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3749 struct rpc_message msg = {
3750 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3754 unsigned long now = jiffies;
3757 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3760 do_renew_lease(clp, now);
3764 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3766 return (server->caps & NFS_CAP_ACLS)
3767 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3768 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3771 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3772 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3775 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3777 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3778 struct page **pages, unsigned int *pgbase)
3780 struct page *newpage, **spages;
3786 len = min_t(size_t, PAGE_SIZE, buflen);
3787 newpage = alloc_page(GFP_KERNEL);
3789 if (newpage == NULL)
3791 memcpy(page_address(newpage), buf, len);
3796 } while (buflen != 0);
3802 __free_page(spages[rc-1]);
3806 struct nfs4_cached_acl {
3812 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3814 struct nfs_inode *nfsi = NFS_I(inode);
3816 spin_lock(&inode->i_lock);
3817 kfree(nfsi->nfs4_acl);
3818 nfsi->nfs4_acl = acl;
3819 spin_unlock(&inode->i_lock);
3822 static void nfs4_zap_acl_attr(struct inode *inode)
3824 nfs4_set_cached_acl(inode, NULL);
3827 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3829 struct nfs_inode *nfsi = NFS_I(inode);
3830 struct nfs4_cached_acl *acl;
3833 spin_lock(&inode->i_lock);
3834 acl = nfsi->nfs4_acl;
3837 if (buf == NULL) /* user is just asking for length */
3839 if (acl->cached == 0)
3841 ret = -ERANGE; /* see getxattr(2) man page */
3842 if (acl->len > buflen)
3844 memcpy(buf, acl->data, acl->len);
3848 spin_unlock(&inode->i_lock);
3852 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3854 struct nfs4_cached_acl *acl;
3855 size_t buflen = sizeof(*acl) + acl_len;
3857 if (buflen <= PAGE_SIZE) {
3858 acl = kmalloc(buflen, GFP_KERNEL);
3862 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3864 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3871 nfs4_set_cached_acl(inode, acl);
3875 * The getxattr API returns the required buffer length when called with a
3876 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3877 * the required buf. On a NULL buf, we send a page of data to the server
3878 * guessing that the ACL request can be serviced by a page. If so, we cache
3879 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3880 * the cache. If not so, we throw away the page, and cache the required
3881 * length. The next getxattr call will then produce another round trip to
3882 * the server, this time with the input buf of the required size.
3884 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3886 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3887 struct nfs_getaclargs args = {
3888 .fh = NFS_FH(inode),
3892 struct nfs_getaclres res = {
3895 struct rpc_message msg = {
3896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3900 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3901 int ret = -ENOMEM, i;
3903 /* As long as we're doing a round trip to the server anyway,
3904 * let's be prepared for a page of acl data. */
3907 if (npages > ARRAY_SIZE(pages))
3910 for (i = 0; i < npages; i++) {
3911 pages[i] = alloc_page(GFP_KERNEL);
3916 /* for decoding across pages */
3917 res.acl_scratch = alloc_page(GFP_KERNEL);
3918 if (!res.acl_scratch)
3921 args.acl_len = npages * PAGE_SIZE;
3922 args.acl_pgbase = 0;
3924 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3925 __func__, buf, buflen, npages, args.acl_len);
3926 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3927 &msg, &args.seq_args, &res.seq_res, 0);
3931 /* Handle the case where the passed-in buffer is too short */
3932 if (res.acl_flags & NFS4_ACL_TRUNC) {
3933 /* Did the user only issue a request for the acl length? */
3939 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3941 if (res.acl_len > buflen) {
3945 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3950 for (i = 0; i < npages; i++)
3952 __free_page(pages[i]);
3953 if (res.acl_scratch)
3954 __free_page(res.acl_scratch);
3958 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3960 struct nfs4_exception exception = { };
3963 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3966 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3967 } while (exception.retry);
3971 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3973 struct nfs_server *server = NFS_SERVER(inode);
3976 if (!nfs4_server_supports_acls(server))
3978 ret = nfs_revalidate_inode(server, inode);
3981 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3982 nfs_zap_acl_cache(inode);
3983 ret = nfs4_read_cached_acl(inode, buf, buflen);
3985 /* -ENOENT is returned if there is no ACL or if there is an ACL
3986 * but no cached acl data, just the acl length */
3988 return nfs4_get_acl_uncached(inode, buf, buflen);
3991 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3993 struct nfs_server *server = NFS_SERVER(inode);
3994 struct page *pages[NFS4ACL_MAXPAGES];
3995 struct nfs_setaclargs arg = {
3996 .fh = NFS_FH(inode),
4000 struct nfs_setaclres res;
4001 struct rpc_message msg = {
4002 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4006 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4009 if (!nfs4_server_supports_acls(server))
4011 if (npages > ARRAY_SIZE(pages))
4013 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4016 nfs4_inode_return_delegation(inode);
4017 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4020 * Free each page after tx, so the only ref left is
4021 * held by the network stack
4024 put_page(pages[i-1]);
4027 * Acl update can result in inode attribute update.
4028 * so mark the attribute cache invalid.
4030 spin_lock(&inode->i_lock);
4031 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4032 spin_unlock(&inode->i_lock);
4033 nfs_access_zap_cache(inode);
4034 nfs_zap_acl_cache(inode);
4038 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4040 struct nfs4_exception exception = { };
4043 err = nfs4_handle_exception(NFS_SERVER(inode),
4044 __nfs4_proc_set_acl(inode, buf, buflen),
4046 } while (exception.retry);
4051 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
4053 struct nfs_client *clp = server->nfs_client;
4055 if (task->tk_status >= 0)
4057 switch(task->tk_status) {
4058 case -NFS4ERR_DELEG_REVOKED:
4059 case -NFS4ERR_ADMIN_REVOKED:
4060 case -NFS4ERR_BAD_STATEID:
4063 nfs_remove_bad_delegation(state->inode);
4064 case -NFS4ERR_OPENMODE:
4067 nfs4_schedule_stateid_recovery(server, state);
4068 goto wait_on_recovery;
4069 case -NFS4ERR_EXPIRED:
4071 nfs4_schedule_stateid_recovery(server, state);
4072 case -NFS4ERR_STALE_STATEID:
4073 case -NFS4ERR_STALE_CLIENTID:
4074 nfs4_schedule_lease_recovery(clp);
4075 goto wait_on_recovery;
4076 #if defined(CONFIG_NFS_V4_1)
4077 case -NFS4ERR_BADSESSION:
4078 case -NFS4ERR_BADSLOT:
4079 case -NFS4ERR_BAD_HIGH_SLOT:
4080 case -NFS4ERR_DEADSESSION:
4081 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4082 case -NFS4ERR_SEQ_FALSE_RETRY:
4083 case -NFS4ERR_SEQ_MISORDERED:
4084 dprintk("%s ERROR %d, Reset session\n", __func__,
4086 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4087 task->tk_status = 0;
4089 #endif /* CONFIG_NFS_V4_1 */
4090 case -NFS4ERR_DELAY:
4091 nfs_inc_server_stats(server, NFSIOS_DELAY);
4092 case -NFS4ERR_GRACE:
4094 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4095 task->tk_status = 0;
4097 case -NFS4ERR_RETRY_UNCACHED_REP:
4098 case -NFS4ERR_OLD_STATEID:
4099 task->tk_status = 0;
4102 task->tk_status = nfs4_map_errors(task->tk_status);
4105 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4106 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4107 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4108 task->tk_status = 0;
4112 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4113 nfs4_verifier *bootverf)
4117 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4118 /* An impossible timestamp guarantees this value
4119 * will never match a generated boot time. */
4121 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4123 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4124 verf[0] = (__be32)nn->boot_time.tv_sec;
4125 verf[1] = (__be32)nn->boot_time.tv_nsec;
4127 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4131 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4132 char *buf, size_t len)
4134 unsigned int result;
4137 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4139 rpc_peeraddr2str(clp->cl_rpcclient,
4141 rpc_peeraddr2str(clp->cl_rpcclient,
4142 RPC_DISPLAY_PROTO));
4148 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4149 char *buf, size_t len)
4151 char *nodename = clp->cl_rpcclient->cl_nodename;
4153 if (nfs4_client_id_uniquifier[0] != '\0')
4154 nodename = nfs4_client_id_uniquifier;
4155 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4156 clp->rpc_ops->version, clp->cl_minorversion,
4161 * nfs4_proc_setclientid - Negotiate client ID
4162 * @clp: state data structure
4163 * @program: RPC program for NFSv4 callback service
4164 * @port: IP port number for NFS4 callback service
4165 * @cred: RPC credential to use for this call
4166 * @res: where to place the result
4168 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4170 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4171 unsigned short port, struct rpc_cred *cred,
4172 struct nfs4_setclientid_res *res)
4174 nfs4_verifier sc_verifier;
4175 struct nfs4_setclientid setclientid = {
4176 .sc_verifier = &sc_verifier,
4178 .sc_cb_ident = clp->cl_cb_ident,
4180 struct rpc_message msg = {
4181 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4182 .rpc_argp = &setclientid,
4188 /* nfs_client_id4 */
4189 nfs4_init_boot_verifier(clp, &sc_verifier);
4190 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4191 setclientid.sc_name_len =
4192 nfs4_init_uniform_client_string(clp,
4193 setclientid.sc_name,
4194 sizeof(setclientid.sc_name));
4196 setclientid.sc_name_len =
4197 nfs4_init_nonuniform_client_string(clp,
4198 setclientid.sc_name,
4199 sizeof(setclientid.sc_name));
4202 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4203 sizeof(setclientid.sc_netid),
4204 rpc_peeraddr2str(clp->cl_rpcclient,
4205 RPC_DISPLAY_NETID));
4207 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4208 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4209 clp->cl_ipaddr, port >> 8, port & 255);
4211 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4212 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4213 setclientid.sc_name_len, setclientid.sc_name);
4214 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4215 dprintk("NFS reply setclientid: %d\n", status);
4220 * nfs4_proc_setclientid_confirm - Confirm client ID
4221 * @clp: state data structure
4222 * @res: result of a previous SETCLIENTID
4223 * @cred: RPC credential to use for this call
4225 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4227 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4228 struct nfs4_setclientid_res *arg,
4229 struct rpc_cred *cred)
4231 struct nfs_fsinfo fsinfo;
4232 struct rpc_message msg = {
4233 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4235 .rpc_resp = &fsinfo,
4241 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4242 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4245 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4247 spin_lock(&clp->cl_lock);
4248 clp->cl_lease_time = fsinfo.lease_time * HZ;
4249 clp->cl_last_renewal = now;
4250 spin_unlock(&clp->cl_lock);
4252 dprintk("NFS reply setclientid_confirm: %d\n", status);
4256 struct nfs4_delegreturndata {
4257 struct nfs4_delegreturnargs args;
4258 struct nfs4_delegreturnres res;
4260 nfs4_stateid stateid;
4261 unsigned long timestamp;
4262 struct nfs_fattr fattr;
4266 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4268 struct nfs4_delegreturndata *data = calldata;
4270 if (!nfs4_sequence_done(task, &data->res.seq_res))
4273 switch (task->tk_status) {
4274 case -NFS4ERR_STALE_STATEID:
4275 case -NFS4ERR_EXPIRED:
4277 renew_lease(data->res.server, data->timestamp);
4280 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4282 rpc_restart_call_prepare(task);
4286 data->rpc_status = task->tk_status;
4289 static void nfs4_delegreturn_release(void *calldata)
4294 #if defined(CONFIG_NFS_V4_1)
4295 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4297 struct nfs4_delegreturndata *d_data;
4299 d_data = (struct nfs4_delegreturndata *)data;
4301 if (nfs4_setup_sequence(d_data->res.server,
4302 &d_data->args.seq_args,
4303 &d_data->res.seq_res, task))
4305 rpc_call_start(task);
4307 #endif /* CONFIG_NFS_V4_1 */
4309 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4310 #if defined(CONFIG_NFS_V4_1)
4311 .rpc_call_prepare = nfs4_delegreturn_prepare,
4312 #endif /* CONFIG_NFS_V4_1 */
4313 .rpc_call_done = nfs4_delegreturn_done,
4314 .rpc_release = nfs4_delegreturn_release,
4317 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4319 struct nfs4_delegreturndata *data;
4320 struct nfs_server *server = NFS_SERVER(inode);
4321 struct rpc_task *task;
4322 struct rpc_message msg = {
4323 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4326 struct rpc_task_setup task_setup_data = {
4327 .rpc_client = server->client,
4328 .rpc_message = &msg,
4329 .callback_ops = &nfs4_delegreturn_ops,
4330 .flags = RPC_TASK_ASYNC,
4334 data = kzalloc(sizeof(*data), GFP_NOFS);
4337 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4338 data->args.fhandle = &data->fh;
4339 data->args.stateid = &data->stateid;
4340 data->args.bitmask = server->cache_consistency_bitmask;
4341 nfs_copy_fh(&data->fh, NFS_FH(inode));
4342 nfs4_stateid_copy(&data->stateid, stateid);
4343 data->res.fattr = &data->fattr;
4344 data->res.server = server;
4345 nfs_fattr_init(data->res.fattr);
4346 data->timestamp = jiffies;
4347 data->rpc_status = 0;
4349 task_setup_data.callback_data = data;
4350 msg.rpc_argp = &data->args;
4351 msg.rpc_resp = &data->res;
4352 task = rpc_run_task(&task_setup_data);
4354 return PTR_ERR(task);
4357 status = nfs4_wait_for_completion_rpc_task(task);
4360 status = data->rpc_status;
4362 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4364 nfs_refresh_inode(inode, &data->fattr);
4370 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4372 struct nfs_server *server = NFS_SERVER(inode);
4373 struct nfs4_exception exception = { };
4376 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4378 case -NFS4ERR_STALE_STATEID:
4379 case -NFS4ERR_EXPIRED:
4383 err = nfs4_handle_exception(server, err, &exception);
4384 } while (exception.retry);
4388 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4389 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4392 * sleep, with exponential backoff, and retry the LOCK operation.
4394 static unsigned long
4395 nfs4_set_lock_task_retry(unsigned long timeout)
4397 freezable_schedule_timeout_killable(timeout);
4399 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4400 return NFS4_LOCK_MAXTIMEOUT;
4404 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4406 struct inode *inode = state->inode;
4407 struct nfs_server *server = NFS_SERVER(inode);
4408 struct nfs_client *clp = server->nfs_client;
4409 struct nfs_lockt_args arg = {
4410 .fh = NFS_FH(inode),
4413 struct nfs_lockt_res res = {
4416 struct rpc_message msg = {
4417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4420 .rpc_cred = state->owner->so_cred,
4422 struct nfs4_lock_state *lsp;
4425 arg.lock_owner.clientid = clp->cl_clientid;
4426 status = nfs4_set_lock_state(state, request);
4429 lsp = request->fl_u.nfs4_fl.owner;
4430 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4431 arg.lock_owner.s_dev = server->s_dev;
4432 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4435 request->fl_type = F_UNLCK;
4437 case -NFS4ERR_DENIED:
4440 request->fl_ops->fl_release_private(request);
4445 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4447 struct nfs4_exception exception = { };
4451 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4452 _nfs4_proc_getlk(state, cmd, request),
4454 } while (exception.retry);
4458 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4461 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4463 res = posix_lock_file_wait(file, fl);
4466 res = flock_lock_file_wait(file, fl);
4474 struct nfs4_unlockdata {
4475 struct nfs_locku_args arg;
4476 struct nfs_locku_res res;
4477 struct nfs4_lock_state *lsp;
4478 struct nfs_open_context *ctx;
4479 struct file_lock fl;
4480 const struct nfs_server *server;
4481 unsigned long timestamp;
4484 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4485 struct nfs_open_context *ctx,
4486 struct nfs4_lock_state *lsp,
4487 struct nfs_seqid *seqid)
4489 struct nfs4_unlockdata *p;
4490 struct inode *inode = lsp->ls_state->inode;
4492 p = kzalloc(sizeof(*p), GFP_NOFS);
4495 p->arg.fh = NFS_FH(inode);
4497 p->arg.seqid = seqid;
4498 p->res.seqid = seqid;
4499 p->arg.stateid = &lsp->ls_stateid;
4501 atomic_inc(&lsp->ls_count);
4502 /* Ensure we don't close file until we're done freeing locks! */
4503 p->ctx = get_nfs_open_context(ctx);
4504 memcpy(&p->fl, fl, sizeof(p->fl));
4505 p->server = NFS_SERVER(inode);
4509 static void nfs4_locku_release_calldata(void *data)
4511 struct nfs4_unlockdata *calldata = data;
4512 nfs_free_seqid(calldata->arg.seqid);
4513 nfs4_put_lock_state(calldata->lsp);
4514 put_nfs_open_context(calldata->ctx);
4518 static void nfs4_locku_done(struct rpc_task *task, void *data)
4520 struct nfs4_unlockdata *calldata = data;
4522 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4524 switch (task->tk_status) {
4526 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4527 &calldata->res.stateid);
4528 renew_lease(calldata->server, calldata->timestamp);
4530 case -NFS4ERR_BAD_STATEID:
4531 case -NFS4ERR_OLD_STATEID:
4532 case -NFS4ERR_STALE_STATEID:
4533 case -NFS4ERR_EXPIRED:
4536 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4537 rpc_restart_call_prepare(task);
4539 nfs_release_seqid(calldata->arg.seqid);
4542 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4544 struct nfs4_unlockdata *calldata = data;
4546 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4548 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
4549 /* Note: exit _without_ running nfs4_locku_done */
4550 task->tk_action = NULL;
4553 calldata->timestamp = jiffies;
4554 if (nfs4_setup_sequence(calldata->server,
4555 &calldata->arg.seq_args,
4556 &calldata->res.seq_res,
4558 nfs_release_seqid(calldata->arg.seqid);
4560 rpc_call_start(task);
4563 static const struct rpc_call_ops nfs4_locku_ops = {
4564 .rpc_call_prepare = nfs4_locku_prepare,
4565 .rpc_call_done = nfs4_locku_done,
4566 .rpc_release = nfs4_locku_release_calldata,
4569 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4570 struct nfs_open_context *ctx,
4571 struct nfs4_lock_state *lsp,
4572 struct nfs_seqid *seqid)
4574 struct nfs4_unlockdata *data;
4575 struct rpc_message msg = {
4576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4577 .rpc_cred = ctx->cred,
4579 struct rpc_task_setup task_setup_data = {
4580 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4581 .rpc_message = &msg,
4582 .callback_ops = &nfs4_locku_ops,
4583 .workqueue = nfsiod_workqueue,
4584 .flags = RPC_TASK_ASYNC,
4587 /* Ensure this is an unlock - when canceling a lock, the
4588 * canceled lock is passed in, and it won't be an unlock.
4590 fl->fl_type = F_UNLCK;
4592 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4594 nfs_free_seqid(seqid);
4595 return ERR_PTR(-ENOMEM);
4598 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4599 msg.rpc_argp = &data->arg;
4600 msg.rpc_resp = &data->res;
4601 task_setup_data.callback_data = data;
4602 return rpc_run_task(&task_setup_data);
4605 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4607 struct nfs_inode *nfsi = NFS_I(state->inode);
4608 struct nfs_seqid *seqid;
4609 struct nfs4_lock_state *lsp;
4610 struct rpc_task *task;
4612 unsigned char fl_flags = request->fl_flags;
4614 status = nfs4_set_lock_state(state, request);
4615 /* Unlock _before_ we do the RPC call */
4616 request->fl_flags |= FL_EXISTS;
4617 down_read(&nfsi->rwsem);
4618 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4619 up_read(&nfsi->rwsem);
4622 up_read(&nfsi->rwsem);
4625 /* Is this a delegated lock? */
4626 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4628 lsp = request->fl_u.nfs4_fl.owner;
4629 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4633 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4634 status = PTR_ERR(task);
4637 status = nfs4_wait_for_completion_rpc_task(task);
4640 request->fl_flags = fl_flags;
4644 struct nfs4_lockdata {
4645 struct nfs_lock_args arg;
4646 struct nfs_lock_res res;
4647 struct nfs4_lock_state *lsp;
4648 struct nfs_open_context *ctx;
4649 struct file_lock fl;
4650 unsigned long timestamp;
4653 struct nfs_server *server;
4656 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4657 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4660 struct nfs4_lockdata *p;
4661 struct inode *inode = lsp->ls_state->inode;
4662 struct nfs_server *server = NFS_SERVER(inode);
4664 p = kzalloc(sizeof(*p), gfp_mask);
4668 p->arg.fh = NFS_FH(inode);
4670 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4671 if (p->arg.open_seqid == NULL)
4673 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4674 if (p->arg.lock_seqid == NULL)
4675 goto out_free_seqid;
4676 p->arg.lock_stateid = &lsp->ls_stateid;
4677 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4678 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4679 p->arg.lock_owner.s_dev = server->s_dev;
4680 p->res.lock_seqid = p->arg.lock_seqid;
4683 atomic_inc(&lsp->ls_count);
4684 p->ctx = get_nfs_open_context(ctx);
4685 memcpy(&p->fl, fl, sizeof(p->fl));
4688 nfs_free_seqid(p->arg.open_seqid);
4694 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4696 struct nfs4_lockdata *data = calldata;
4697 struct nfs4_state *state = data->lsp->ls_state;
4699 dprintk("%s: begin!\n", __func__);
4700 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4702 /* Do we need to do an open_to_lock_owner? */
4703 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4704 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4705 goto out_release_lock_seqid;
4706 data->arg.open_stateid = &state->stateid;
4707 data->arg.new_lock_owner = 1;
4708 data->res.open_seqid = data->arg.open_seqid;
4710 data->arg.new_lock_owner = 0;
4711 data->timestamp = jiffies;
4712 if (nfs4_setup_sequence(data->server,
4713 &data->arg.seq_args,
4716 rpc_call_start(task);
4719 nfs_release_seqid(data->arg.open_seqid);
4720 out_release_lock_seqid:
4721 nfs_release_seqid(data->arg.lock_seqid);
4722 dprintk("%s: done!, ret = %d\n", __func__, task->tk_status);
4725 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4727 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4728 nfs4_lock_prepare(task, calldata);
4731 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4733 struct nfs4_lockdata *data = calldata;
4735 dprintk("%s: begin!\n", __func__);
4737 if (!nfs4_sequence_done(task, &data->res.seq_res))
4740 data->rpc_status = task->tk_status;
4741 if (data->arg.new_lock_owner != 0) {
4742 if (data->rpc_status == 0)
4743 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4747 if (data->rpc_status == 0) {
4748 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4749 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
4750 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4753 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4756 static void nfs4_lock_release(void *calldata)
4758 struct nfs4_lockdata *data = calldata;
4760 dprintk("%s: begin!\n", __func__);
4761 nfs_free_seqid(data->arg.open_seqid);
4762 if (data->cancelled != 0) {
4763 struct rpc_task *task;
4764 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4765 data->arg.lock_seqid);
4767 rpc_put_task_async(task);
4768 dprintk("%s: cancelling lock!\n", __func__);
4770 nfs_free_seqid(data->arg.lock_seqid);
4771 nfs4_put_lock_state(data->lsp);
4772 put_nfs_open_context(data->ctx);
4774 dprintk("%s: done!\n", __func__);
4777 static const struct rpc_call_ops nfs4_lock_ops = {
4778 .rpc_call_prepare = nfs4_lock_prepare,
4779 .rpc_call_done = nfs4_lock_done,
4780 .rpc_release = nfs4_lock_release,
4783 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4784 .rpc_call_prepare = nfs4_recover_lock_prepare,
4785 .rpc_call_done = nfs4_lock_done,
4786 .rpc_release = nfs4_lock_release,
4789 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4792 case -NFS4ERR_ADMIN_REVOKED:
4793 case -NFS4ERR_BAD_STATEID:
4794 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4795 if (new_lock_owner != 0 ||
4796 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
4797 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4799 case -NFS4ERR_STALE_STATEID:
4800 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4801 case -NFS4ERR_EXPIRED:
4802 nfs4_schedule_lease_recovery(server->nfs_client);
4806 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4808 struct nfs4_lockdata *data;
4809 struct rpc_task *task;
4810 struct rpc_message msg = {
4811 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4812 .rpc_cred = state->owner->so_cred,
4814 struct rpc_task_setup task_setup_data = {
4815 .rpc_client = NFS_CLIENT(state->inode),
4816 .rpc_message = &msg,
4817 .callback_ops = &nfs4_lock_ops,
4818 .workqueue = nfsiod_workqueue,
4819 .flags = RPC_TASK_ASYNC,
4823 dprintk("%s: begin!\n", __func__);
4824 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4825 fl->fl_u.nfs4_fl.owner,
4826 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4830 data->arg.block = 1;
4831 if (recovery_type > NFS_LOCK_NEW) {
4832 if (recovery_type == NFS_LOCK_RECLAIM)
4833 data->arg.reclaim = NFS_LOCK_RECLAIM;
4834 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4836 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4837 msg.rpc_argp = &data->arg;
4838 msg.rpc_resp = &data->res;
4839 task_setup_data.callback_data = data;
4840 task = rpc_run_task(&task_setup_data);
4842 return PTR_ERR(task);
4843 ret = nfs4_wait_for_completion_rpc_task(task);
4845 ret = data->rpc_status;
4847 nfs4_handle_setlk_error(data->server, data->lsp,
4848 data->arg.new_lock_owner, ret);
4850 data->cancelled = 1;
4852 dprintk("%s: done, ret = %d!\n", __func__, ret);
4856 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4858 struct nfs_server *server = NFS_SERVER(state->inode);
4859 struct nfs4_exception exception = {
4860 .inode = state->inode,
4865 /* Cache the lock if possible... */
4866 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4868 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4869 if (err != -NFS4ERR_DELAY)
4871 nfs4_handle_exception(server, err, &exception);
4872 } while (exception.retry);
4876 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4878 struct nfs_server *server = NFS_SERVER(state->inode);
4879 struct nfs4_exception exception = {
4880 .inode = state->inode,
4884 err = nfs4_set_lock_state(state, request);
4888 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4890 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4894 case -NFS4ERR_GRACE:
4895 case -NFS4ERR_DELAY:
4896 nfs4_handle_exception(server, err, &exception);
4899 } while (exception.retry);
4904 #if defined(CONFIG_NFS_V4_1)
4906 * nfs41_check_expired_locks - possibly free a lock stateid
4908 * @state: NFSv4 state for an inode
4910 * Returns NFS_OK if recovery for this stateid is now finished.
4911 * Otherwise a negative NFS4ERR value is returned.
4913 static int nfs41_check_expired_locks(struct nfs4_state *state)
4915 int status, ret = -NFS4ERR_BAD_STATEID;
4916 struct nfs4_lock_state *lsp;
4917 struct nfs_server *server = NFS_SERVER(state->inode);
4919 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4920 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
4921 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4922 if (status != NFS_OK) {
4923 /* Free the stateid unless the server
4924 * informs us the stateid is unrecognized. */
4925 if (status != -NFS4ERR_BAD_STATEID)
4926 nfs41_free_stateid(server,
4928 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
4937 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4939 int status = NFS_OK;
4941 if (test_bit(LK_STATE_IN_USE, &state->flags))
4942 status = nfs41_check_expired_locks(state);
4943 if (status != NFS_OK)
4944 status = nfs4_lock_expired(state, request);
4949 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4951 struct nfs_inode *nfsi = NFS_I(state->inode);
4952 unsigned char fl_flags = request->fl_flags;
4953 int status = -ENOLCK;
4955 if ((fl_flags & FL_POSIX) &&
4956 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4958 /* Is this a delegated open? */
4959 status = nfs4_set_lock_state(state, request);
4962 request->fl_flags |= FL_ACCESS;
4963 status = do_vfs_lock(request->fl_file, request);
4966 down_read(&nfsi->rwsem);
4967 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4968 /* Yes: cache locks! */
4969 /* ...but avoid races with delegation recall... */
4970 request->fl_flags = fl_flags & ~FL_SLEEP;
4971 status = do_vfs_lock(request->fl_file, request);
4974 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4977 /* Note: we always want to sleep here! */
4978 request->fl_flags = fl_flags | FL_SLEEP;
4979 if (do_vfs_lock(request->fl_file, request) < 0)
4980 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4981 "manager!\n", __func__);
4983 up_read(&nfsi->rwsem);
4985 request->fl_flags = fl_flags;
4989 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4991 struct nfs4_exception exception = {
4993 .inode = state->inode,
4998 err = _nfs4_proc_setlk(state, cmd, request);
4999 if (err == -NFS4ERR_DENIED)
5001 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5003 } while (exception.retry);
5008 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5010 struct nfs_open_context *ctx;
5011 struct nfs4_state *state;
5012 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5015 /* verify open state */
5016 ctx = nfs_file_open_context(filp);
5019 if (request->fl_start < 0 || request->fl_end < 0)
5022 if (IS_GETLK(cmd)) {
5024 return nfs4_proc_getlk(state, F_GETLK, request);
5028 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5031 if (request->fl_type == F_UNLCK) {
5033 return nfs4_proc_unlck(state, cmd, request);
5040 * Don't rely on the VFS having checked the file open mode,
5041 * since it won't do this for flock() locks.
5043 switch (request->fl_type) {
5045 if (!(filp->f_mode & FMODE_READ))
5049 if (!(filp->f_mode & FMODE_WRITE))
5054 status = nfs4_proc_setlk(state, cmd, request);
5055 if ((status != -EAGAIN) || IS_SETLK(cmd))
5057 timeout = nfs4_set_lock_task_retry(timeout);
5058 status = -ERESTARTSYS;
5061 } while(status < 0);
5065 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
5067 struct nfs_server *server = NFS_SERVER(state->inode);
5068 struct nfs4_exception exception = { };
5071 err = nfs4_set_lock_state(state, fl);
5075 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5078 printk(KERN_ERR "NFS: %s: unhandled error "
5079 "%d.\n", __func__, err);
5083 case -NFS4ERR_EXPIRED:
5084 nfs4_schedule_stateid_recovery(server, state);
5085 case -NFS4ERR_STALE_CLIENTID:
5086 case -NFS4ERR_STALE_STATEID:
5087 nfs4_schedule_lease_recovery(server->nfs_client);
5089 case -NFS4ERR_BADSESSION:
5090 case -NFS4ERR_BADSLOT:
5091 case -NFS4ERR_BAD_HIGH_SLOT:
5092 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5093 case -NFS4ERR_DEADSESSION:
5094 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
5098 * The show must go on: exit, but mark the
5099 * stateid as needing recovery.
5101 case -NFS4ERR_DELEG_REVOKED:
5102 case -NFS4ERR_ADMIN_REVOKED:
5103 case -NFS4ERR_BAD_STATEID:
5104 case -NFS4ERR_OPENMODE:
5105 nfs4_schedule_stateid_recovery(server, state);
5110 * User RPCSEC_GSS context has expired.
5111 * We cannot recover this stateid now, so
5112 * skip it and allow recovery thread to
5118 case -NFS4ERR_DENIED:
5119 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5122 case -NFS4ERR_DELAY:
5125 err = nfs4_handle_exception(server, err, &exception);
5126 } while (exception.retry);
5131 struct nfs_release_lockowner_data {
5132 struct nfs4_lock_state *lsp;
5133 struct nfs_server *server;
5134 struct nfs_release_lockowner_args args;
5137 static void nfs4_release_lockowner_release(void *calldata)
5139 struct nfs_release_lockowner_data *data = calldata;
5140 nfs4_free_lock_state(data->server, data->lsp);
5144 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5145 .rpc_release = nfs4_release_lockowner_release,
5148 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
5150 struct nfs_server *server = lsp->ls_state->owner->so_server;
5151 struct nfs_release_lockowner_data *data;
5152 struct rpc_message msg = {
5153 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5156 if (server->nfs_client->cl_mvops->minor_version != 0)
5158 data = kmalloc(sizeof(*data), GFP_NOFS);
5162 data->server = server;
5163 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5164 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5165 data->args.lock_owner.s_dev = server->s_dev;
5166 msg.rpc_argp = &data->args;
5167 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5171 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5173 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5174 const void *buf, size_t buflen,
5175 int flags, int type)
5177 if (strcmp(key, "") != 0)
5180 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5183 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5184 void *buf, size_t buflen, int type)
5186 if (strcmp(key, "") != 0)
5189 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5192 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5193 size_t list_len, const char *name,
5194 size_t name_len, int type)
5196 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5198 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5201 if (list && len <= list_len)
5202 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5207 * nfs_fhget will use either the mounted_on_fileid or the fileid
5209 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5211 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5212 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5213 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5214 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5217 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5218 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5219 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5223 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5224 const struct qstr *name,
5225 struct nfs4_fs_locations *fs_locations,
5228 struct nfs_server *server = NFS_SERVER(dir);
5230 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5232 struct nfs4_fs_locations_arg args = {
5233 .dir_fh = NFS_FH(dir),
5238 struct nfs4_fs_locations_res res = {
5239 .fs_locations = fs_locations,
5241 struct rpc_message msg = {
5242 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5248 dprintk("%s: start\n", __func__);
5250 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5251 * is not supported */
5252 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5253 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5255 bitmask[0] |= FATTR4_WORD0_FILEID;
5257 nfs_fattr_init(&fs_locations->fattr);
5258 fs_locations->server = server;
5259 fs_locations->nlocations = 0;
5260 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5261 dprintk("%s: returned status = %d\n", __func__, status);
5265 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5266 const struct qstr *name,
5267 struct nfs4_fs_locations *fs_locations,
5270 struct nfs4_exception exception = { };
5273 err = nfs4_handle_exception(NFS_SERVER(dir),
5274 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5276 } while (exception.retry);
5280 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5283 struct nfs4_secinfo_arg args = {
5284 .dir_fh = NFS_FH(dir),
5287 struct nfs4_secinfo_res res = {
5290 struct rpc_message msg = {
5291 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5296 dprintk("NFS call secinfo %s\n", name->name);
5297 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5298 dprintk("NFS reply secinfo: %d\n", status);
5302 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5303 struct nfs4_secinfo_flavors *flavors)
5305 struct nfs4_exception exception = { };
5308 err = nfs4_handle_exception(NFS_SERVER(dir),
5309 _nfs4_proc_secinfo(dir, name, flavors),
5311 } while (exception.retry);
5315 #ifdef CONFIG_NFS_V4_1
5317 * Check the exchange flags returned by the server for invalid flags, having
5318 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5321 static int nfs4_check_cl_exchange_flags(u32 flags)
5323 if (flags & ~EXCHGID4_FLAG_MASK_R)
5325 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5326 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5328 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5332 return -NFS4ERR_INVAL;
5336 nfs41_same_server_scope(struct nfs41_server_scope *a,
5337 struct nfs41_server_scope *b)
5339 if (a->server_scope_sz == b->server_scope_sz &&
5340 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5347 * nfs4_proc_bind_conn_to_session()
5349 * The 4.1 client currently uses the same TCP connection for the
5350 * fore and backchannel.
5352 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5355 struct nfs41_bind_conn_to_session_res res;
5356 struct rpc_message msg = {
5358 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5364 dprintk("--> %s\n", __func__);
5365 BUG_ON(clp == NULL);
5367 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5368 if (unlikely(res.session == NULL)) {
5373 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5375 if (memcmp(res.session->sess_id.data,
5376 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5377 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5381 if (res.dir != NFS4_CDFS4_BOTH) {
5382 dprintk("NFS: %s: Unexpected direction from server\n",
5387 if (res.use_conn_in_rdma_mode) {
5388 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5397 dprintk("<-- %s status= %d\n", __func__, status);
5402 * nfs4_proc_exchange_id()
5404 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5406 * Since the clientid has expired, all compounds using sessions
5407 * associated with the stale clientid will be returning
5408 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5409 * be in some phase of session reset.
5411 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5413 nfs4_verifier verifier;
5414 struct nfs41_exchange_id_args args = {
5415 .verifier = &verifier,
5417 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5419 struct nfs41_exchange_id_res res = {
5423 struct rpc_message msg = {
5424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5430 nfs4_init_boot_verifier(clp, &verifier);
5431 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5433 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5434 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5435 args.id_len, args.id);
5437 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5439 if (unlikely(res.server_owner == NULL)) {
5444 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5446 if (unlikely(res.server_scope == NULL)) {
5448 goto out_server_owner;
5451 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5452 if (unlikely(res.impl_id == NULL)) {
5454 goto out_server_scope;
5457 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5459 status = nfs4_check_cl_exchange_flags(res.flags);
5462 clp->cl_clientid = res.clientid;
5463 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5464 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5465 clp->cl_seqid = res.seqid;
5467 kfree(clp->cl_serverowner);
5468 clp->cl_serverowner = res.server_owner;
5469 res.server_owner = NULL;
5471 /* use the most recent implementation id */
5472 kfree(clp->cl_implid);
5473 clp->cl_implid = res.impl_id;
5475 if (clp->cl_serverscope != NULL &&
5476 !nfs41_same_server_scope(clp->cl_serverscope,
5477 res.server_scope)) {
5478 dprintk("%s: server_scope mismatch detected\n",
5480 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5481 kfree(clp->cl_serverscope);
5482 clp->cl_serverscope = NULL;
5485 if (clp->cl_serverscope == NULL) {
5486 clp->cl_serverscope = res.server_scope;
5493 kfree(res.server_owner);
5495 kfree(res.server_scope);
5497 if (clp->cl_implid != NULL)
5498 dprintk("NFS reply exchange_id: Server Implementation ID: "
5499 "domain: %s, name: %s, date: %llu,%u\n",
5500 clp->cl_implid->domain, clp->cl_implid->name,
5501 clp->cl_implid->date.seconds,
5502 clp->cl_implid->date.nseconds);
5503 dprintk("NFS reply exchange_id: %d\n", status);
5507 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5508 struct rpc_cred *cred)
5510 struct rpc_message msg = {
5511 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5517 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5519 dprintk("NFS: Got error %d from the server %s on "
5520 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5524 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5525 struct rpc_cred *cred)
5530 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5531 ret = _nfs4_proc_destroy_clientid(clp, cred);
5533 case -NFS4ERR_DELAY:
5534 case -NFS4ERR_CLIENTID_BUSY:
5544 int nfs4_destroy_clientid(struct nfs_client *clp)
5546 struct rpc_cred *cred;
5549 if (clp->cl_mvops->minor_version < 1)
5551 if (clp->cl_exchange_flags == 0)
5553 if (clp->cl_preserve_clid)
5555 cred = nfs4_get_exchange_id_cred(clp);
5556 ret = nfs4_proc_destroy_clientid(clp, cred);
5561 case -NFS4ERR_STALE_CLIENTID:
5562 clp->cl_exchange_flags = 0;
5568 struct nfs4_get_lease_time_data {
5569 struct nfs4_get_lease_time_args *args;
5570 struct nfs4_get_lease_time_res *res;
5571 struct nfs_client *clp;
5574 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5578 struct nfs4_get_lease_time_data *data =
5579 (struct nfs4_get_lease_time_data *)calldata;
5581 dprintk("--> %s\n", __func__);
5582 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5583 /* just setup sequence, do not trigger session recovery
5584 since we're invoked within one */
5585 ret = nfs41_setup_sequence(data->clp->cl_session,
5586 &data->args->la_seq_args,
5587 &data->res->lr_seq_res, task);
5589 BUG_ON(ret == -EAGAIN);
5590 rpc_call_start(task);
5591 dprintk("<-- %s\n", __func__);
5595 * Called from nfs4_state_manager thread for session setup, so don't recover
5596 * from sequence operation or clientid errors.
5598 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5600 struct nfs4_get_lease_time_data *data =
5601 (struct nfs4_get_lease_time_data *)calldata;
5603 dprintk("--> %s\n", __func__);
5604 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5606 switch (task->tk_status) {
5607 case -NFS4ERR_DELAY:
5608 case -NFS4ERR_GRACE:
5609 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5610 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5611 task->tk_status = 0;
5613 case -NFS4ERR_RETRY_UNCACHED_REP:
5614 rpc_restart_call_prepare(task);
5617 dprintk("<-- %s\n", __func__);
5620 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5621 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5622 .rpc_call_done = nfs4_get_lease_time_done,
5625 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5627 struct rpc_task *task;
5628 struct nfs4_get_lease_time_args args;
5629 struct nfs4_get_lease_time_res res = {
5630 .lr_fsinfo = fsinfo,
5632 struct nfs4_get_lease_time_data data = {
5637 struct rpc_message msg = {
5638 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5642 struct rpc_task_setup task_setup = {
5643 .rpc_client = clp->cl_rpcclient,
5644 .rpc_message = &msg,
5645 .callback_ops = &nfs4_get_lease_time_ops,
5646 .callback_data = &data,
5647 .flags = RPC_TASK_TIMEOUT,
5651 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5652 dprintk("--> %s\n", __func__);
5653 task = rpc_run_task(&task_setup);
5656 status = PTR_ERR(task);
5658 status = task->tk_status;
5661 dprintk("<-- %s return %d\n", __func__, status);
5666 static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5668 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5671 static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5672 struct nfs4_slot *new,
5676 struct nfs4_slot *old = NULL;
5679 spin_lock(&tbl->slot_tbl_lock);
5683 tbl->max_slots = max_slots;
5685 tbl->highest_used_slotid = NFS4_NO_SLOT;
5686 for (i = 0; i < tbl->max_slots; i++)
5687 tbl->slots[i].seq_nr = ivalue;
5688 spin_unlock(&tbl->slot_tbl_lock);
5693 * (re)Initialise a slot table
5695 static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5698 struct nfs4_slot *new = NULL;
5701 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5702 max_reqs, tbl->max_slots);
5704 /* Does the newly negotiated max_reqs match the existing slot table? */
5705 if (max_reqs != tbl->max_slots) {
5706 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
5712 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
5713 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5714 tbl, tbl->slots, tbl->max_slots);
5716 dprintk("<-- %s: return %d\n", __func__, ret);
5720 /* Destroy the slot table */
5721 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5723 if (session->fc_slot_table.slots != NULL) {
5724 kfree(session->fc_slot_table.slots);
5725 session->fc_slot_table.slots = NULL;
5727 if (session->bc_slot_table.slots != NULL) {
5728 kfree(session->bc_slot_table.slots);
5729 session->bc_slot_table.slots = NULL;
5735 * Initialize or reset the forechannel and backchannel tables
5737 static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5739 struct nfs4_slot_table *tbl;
5742 dprintk("--> %s\n", __func__);
5744 tbl = &ses->fc_slot_table;
5745 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5746 if (status) /* -ENOMEM */
5749 tbl = &ses->bc_slot_table;
5750 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5751 if (status && tbl->slots == NULL)
5752 /* Fore and back channel share a connection so get
5753 * both slot tables or neither */
5754 nfs4_destroy_slot_tables(ses);
5758 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5760 struct nfs4_session *session;
5761 struct nfs4_slot_table *tbl;
5763 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5767 tbl = &session->fc_slot_table;
5768 tbl->highest_used_slotid = NFS4_NO_SLOT;
5769 spin_lock_init(&tbl->slot_tbl_lock);
5770 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5771 init_completion(&tbl->complete);
5773 tbl = &session->bc_slot_table;
5774 tbl->highest_used_slotid = NFS4_NO_SLOT;
5775 spin_lock_init(&tbl->slot_tbl_lock);
5776 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5777 init_completion(&tbl->complete);
5779 session->session_state = 1<<NFS4_SESSION_INITING;
5785 void nfs4_destroy_session(struct nfs4_session *session)
5787 struct rpc_xprt *xprt;
5788 struct rpc_cred *cred;
5790 cred = nfs4_get_exchange_id_cred(session->clp);
5791 nfs4_proc_destroy_session(session, cred);
5796 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5798 dprintk("%s Destroy backchannel for xprt %p\n",
5800 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5801 nfs4_destroy_slot_tables(session);
5806 * Initialize the values to be used by the client in CREATE_SESSION
5807 * If nfs4_init_session set the fore channel request and response sizes,
5810 * Set the back channel max_resp_sz_cached to zero to force the client to
5811 * always set csa_cachethis to FALSE because the current implementation
5812 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5814 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5816 struct nfs4_session *session = args->client->cl_session;
5817 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5818 mxresp_sz = session->fc_attrs.max_resp_sz;
5821 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5823 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5824 /* Fore channel attributes */
5825 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5826 args->fc_attrs.max_resp_sz = mxresp_sz;
5827 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5828 args->fc_attrs.max_reqs = max_session_slots;
5830 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5831 "max_ops=%u max_reqs=%u\n",
5833 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5834 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5836 /* Back channel attributes */
5837 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5838 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5839 args->bc_attrs.max_resp_sz_cached = 0;
5840 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5841 args->bc_attrs.max_reqs = 1;
5843 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5844 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5846 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5847 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5848 args->bc_attrs.max_reqs);
5851 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5853 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5854 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5856 if (rcvd->max_resp_sz > sent->max_resp_sz)
5859 * Our requested max_ops is the minimum we need; we're not
5860 * prepared to break up compounds into smaller pieces than that.
5861 * So, no point even trying to continue if the server won't
5864 if (rcvd->max_ops < sent->max_ops)
5866 if (rcvd->max_reqs == 0)
5868 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5869 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5873 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5875 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5876 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5878 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5880 if (rcvd->max_resp_sz < sent->max_resp_sz)
5882 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5884 /* These would render the backchannel useless: */
5885 if (rcvd->max_ops != sent->max_ops)
5887 if (rcvd->max_reqs != sent->max_reqs)
5892 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5893 struct nfs4_session *session)
5897 ret = nfs4_verify_fore_channel_attrs(args, session);
5900 return nfs4_verify_back_channel_attrs(args, session);
5903 static int _nfs4_proc_create_session(struct nfs_client *clp,
5904 struct rpc_cred *cred)
5906 struct nfs4_session *session = clp->cl_session;
5907 struct nfs41_create_session_args args = {
5909 .cb_program = NFS4_CALLBACK,
5911 struct nfs41_create_session_res res = {
5914 struct rpc_message msg = {
5915 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5922 nfs4_init_channel_attrs(&args);
5923 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5925 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5928 /* Verify the session's negotiated channel_attrs values */
5929 status = nfs4_verify_channel_attrs(&args, session);
5931 /* Increment the clientid slot sequence id */
5939 * Issues a CREATE_SESSION operation to the server.
5940 * It is the responsibility of the caller to verify the session is
5941 * expired before calling this routine.
5943 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5947 struct nfs4_session *session = clp->cl_session;
5949 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5951 status = _nfs4_proc_create_session(clp, cred);
5955 /* Init or reset the session slot tables */
5956 status = nfs4_setup_session_slot_tables(session);
5957 dprintk("slot table setup returned %d\n", status);
5961 ptr = (unsigned *)&session->sess_id.data[0];
5962 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5963 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5965 dprintk("<-- %s\n", __func__);
5970 * Issue the over-the-wire RPC DESTROY_SESSION.
5971 * The caller must serialize access to this routine.
5973 int nfs4_proc_destroy_session(struct nfs4_session *session,
5974 struct rpc_cred *cred)
5976 struct rpc_message msg = {
5977 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5978 .rpc_argp = session,
5983 dprintk("--> nfs4_proc_destroy_session\n");
5985 /* session is still being setup */
5986 if (session->clp->cl_cons_state != NFS_CS_READY)
5989 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5992 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
5993 "Session has been destroyed regardless...\n", status);
5995 dprintk("<-- nfs4_proc_destroy_session\n");
6000 * With sessions, the client is not marked ready until after a
6001 * successful EXCHANGE_ID and CREATE_SESSION.
6003 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
6004 * other versions of NFS can be tried.
6006 static int nfs41_check_session_ready(struct nfs_client *clp)
6010 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
6011 ret = nfs4_client_recover_expired_lease(clp);
6015 if (clp->cl_cons_state < NFS_CS_READY)
6016 return -EPROTONOSUPPORT;
6021 int nfs4_init_session(struct nfs_server *server)
6023 struct nfs_client *clp = server->nfs_client;
6024 struct nfs4_session *session;
6025 unsigned int rsize, wsize;
6027 if (!nfs4_has_session(clp))
6030 session = clp->cl_session;
6031 spin_lock(&clp->cl_lock);
6032 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
6034 rsize = server->rsize;
6036 rsize = NFS_MAX_FILE_IO_SIZE;
6037 wsize = server->wsize;
6039 wsize = NFS_MAX_FILE_IO_SIZE;
6041 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
6042 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
6044 spin_unlock(&clp->cl_lock);
6046 return nfs41_check_session_ready(clp);
6049 int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
6051 struct nfs4_session *session = clp->cl_session;
6054 spin_lock(&clp->cl_lock);
6055 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
6057 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
6058 * DS lease to be equal to the MDS lease.
6060 clp->cl_lease_time = lease_time;
6061 clp->cl_last_renewal = jiffies;
6063 spin_unlock(&clp->cl_lock);
6065 ret = nfs41_check_session_ready(clp);
6068 /* Test for the DS role */
6069 if (!is_ds_client(clp))
6073 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
6077 * Renew the cl_session lease.
6079 struct nfs4_sequence_data {
6080 struct nfs_client *clp;
6081 struct nfs4_sequence_args args;
6082 struct nfs4_sequence_res res;
6085 static void nfs41_sequence_release(void *data)
6087 struct nfs4_sequence_data *calldata = data;
6088 struct nfs_client *clp = calldata->clp;
6090 if (atomic_read(&clp->cl_count) > 1)
6091 nfs4_schedule_state_renewal(clp);
6092 nfs_put_client(clp);
6096 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6098 switch(task->tk_status) {
6099 case -NFS4ERR_DELAY:
6100 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6103 nfs4_schedule_lease_recovery(clp);
6108 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
6110 struct nfs4_sequence_data *calldata = data;
6111 struct nfs_client *clp = calldata->clp;
6113 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6116 if (task->tk_status < 0) {
6117 dprintk("%s ERROR %d\n", __func__, task->tk_status);
6118 if (atomic_read(&clp->cl_count) == 1)
6121 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6122 rpc_restart_call_prepare(task);
6126 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
6128 dprintk("<-- %s\n", __func__);
6131 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6133 struct nfs4_sequence_data *calldata = data;
6134 struct nfs_client *clp = calldata->clp;
6135 struct nfs4_sequence_args *args;
6136 struct nfs4_sequence_res *res;
6138 args = task->tk_msg.rpc_argp;
6139 res = task->tk_msg.rpc_resp;
6141 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
6143 rpc_call_start(task);
6146 static const struct rpc_call_ops nfs41_sequence_ops = {
6147 .rpc_call_done = nfs41_sequence_call_done,
6148 .rpc_call_prepare = nfs41_sequence_prepare,
6149 .rpc_release = nfs41_sequence_release,
6152 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6154 struct nfs4_sequence_data *calldata;
6155 struct rpc_message msg = {
6156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6159 struct rpc_task_setup task_setup_data = {
6160 .rpc_client = clp->cl_rpcclient,
6161 .rpc_message = &msg,
6162 .callback_ops = &nfs41_sequence_ops,
6163 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6166 if (!atomic_inc_not_zero(&clp->cl_count))
6167 return ERR_PTR(-EIO);
6168 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6169 if (calldata == NULL) {
6170 nfs_put_client(clp);
6171 return ERR_PTR(-ENOMEM);
6173 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
6174 msg.rpc_argp = &calldata->args;
6175 msg.rpc_resp = &calldata->res;
6176 calldata->clp = clp;
6177 task_setup_data.callback_data = calldata;
6179 return rpc_run_task(&task_setup_data);
6182 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
6184 struct rpc_task *task;
6187 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6189 task = _nfs41_proc_sequence(clp, cred);
6191 ret = PTR_ERR(task);
6193 rpc_put_task_async(task);
6194 dprintk("<-- %s status=%d\n", __func__, ret);
6198 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6200 struct rpc_task *task;
6203 task = _nfs41_proc_sequence(clp, cred);
6205 ret = PTR_ERR(task);
6208 ret = rpc_wait_for_completion_task(task);
6210 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6212 if (task->tk_status == 0)
6213 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
6214 ret = task->tk_status;
6218 dprintk("<-- %s status=%d\n", __func__, ret);
6222 struct nfs4_reclaim_complete_data {
6223 struct nfs_client *clp;
6224 struct nfs41_reclaim_complete_args arg;
6225 struct nfs41_reclaim_complete_res res;
6228 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6230 struct nfs4_reclaim_complete_data *calldata = data;
6232 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
6233 if (nfs41_setup_sequence(calldata->clp->cl_session,
6234 &calldata->arg.seq_args,
6235 &calldata->res.seq_res, task))
6238 rpc_call_start(task);
6241 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6243 switch(task->tk_status) {
6245 case -NFS4ERR_COMPLETE_ALREADY:
6246 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6248 case -NFS4ERR_DELAY:
6249 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6251 case -NFS4ERR_RETRY_UNCACHED_REP:
6254 nfs4_schedule_lease_recovery(clp);
6259 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6261 struct nfs4_reclaim_complete_data *calldata = data;
6262 struct nfs_client *clp = calldata->clp;
6263 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6265 dprintk("--> %s\n", __func__);
6266 if (!nfs41_sequence_done(task, res))
6269 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6270 rpc_restart_call_prepare(task);
6273 dprintk("<-- %s\n", __func__);
6276 static void nfs4_free_reclaim_complete_data(void *data)
6278 struct nfs4_reclaim_complete_data *calldata = data;
6283 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6284 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6285 .rpc_call_done = nfs4_reclaim_complete_done,
6286 .rpc_release = nfs4_free_reclaim_complete_data,
6290 * Issue a global reclaim complete.
6292 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6294 struct nfs4_reclaim_complete_data *calldata;
6295 struct rpc_task *task;
6296 struct rpc_message msg = {
6297 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6299 struct rpc_task_setup task_setup_data = {
6300 .rpc_client = clp->cl_rpcclient,
6301 .rpc_message = &msg,
6302 .callback_ops = &nfs4_reclaim_complete_call_ops,
6303 .flags = RPC_TASK_ASYNC,
6305 int status = -ENOMEM;
6307 dprintk("--> %s\n", __func__);
6308 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6309 if (calldata == NULL)
6311 calldata->clp = clp;
6312 calldata->arg.one_fs = 0;
6314 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6315 msg.rpc_argp = &calldata->arg;
6316 msg.rpc_resp = &calldata->res;
6317 task_setup_data.callback_data = calldata;
6318 task = rpc_run_task(&task_setup_data);
6320 status = PTR_ERR(task);
6323 status = nfs4_wait_for_completion_rpc_task(task);
6325 status = task->tk_status;
6329 dprintk("<-- %s status=%d\n", __func__, status);
6334 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6336 struct nfs4_layoutget *lgp = calldata;
6337 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6339 dprintk("--> %s\n", __func__);
6340 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6341 * right now covering the LAYOUTGET we are about to send.
6342 * However, that is not so catastrophic, and there seems
6343 * to be no way to prevent it completely.
6345 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
6346 &lgp->res.seq_res, task))
6348 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6349 NFS_I(lgp->args.inode)->layout,
6350 lgp->args.ctx->state)) {
6351 rpc_exit(task, NFS4_OK);
6354 rpc_call_start(task);
6357 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6359 struct nfs4_layoutget *lgp = calldata;
6360 struct inode *inode = lgp->args.inode;
6361 struct nfs_server *server = NFS_SERVER(inode);
6362 struct pnfs_layout_hdr *lo;
6363 struct nfs4_state *state = NULL;
6365 dprintk("--> %s\n", __func__);
6367 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6370 switch (task->tk_status) {
6373 case -NFS4ERR_LAYOUTTRYLATER:
6374 case -NFS4ERR_RECALLCONFLICT:
6375 task->tk_status = -NFS4ERR_DELAY;
6377 case -NFS4ERR_EXPIRED:
6378 case -NFS4ERR_BAD_STATEID:
6379 spin_lock(&inode->i_lock);
6380 lo = NFS_I(inode)->layout;
6381 if (!lo || list_empty(&lo->plh_segs)) {
6382 spin_unlock(&inode->i_lock);
6383 /* If the open stateid was bad, then recover it. */
6384 state = lgp->args.ctx->state;
6388 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6389 spin_unlock(&inode->i_lock);
6390 /* Mark the bad layout state as invalid, then
6391 * retry using the open stateid. */
6392 pnfs_free_lseg_list(&head);
6395 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6396 rpc_restart_call_prepare(task);
6398 dprintk("<-- %s\n", __func__);
6401 static size_t max_response_pages(struct nfs_server *server)
6403 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6404 return nfs_page_array_len(0, max_resp_sz);
6407 static void nfs4_free_pages(struct page **pages, size_t size)
6414 for (i = 0; i < size; i++) {
6417 __free_page(pages[i]);
6422 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6424 struct page **pages;
6427 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6429 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6433 for (i = 0; i < size; i++) {
6434 pages[i] = alloc_page(gfp_flags);
6436 dprintk("%s: failed to allocate page\n", __func__);
6437 nfs4_free_pages(pages, size);
6445 static void nfs4_layoutget_release(void *calldata)
6447 struct nfs4_layoutget *lgp = calldata;
6448 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6449 size_t max_pages = max_response_pages(server);
6451 dprintk("--> %s\n", __func__);
6452 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6453 put_nfs_open_context(lgp->args.ctx);
6455 dprintk("<-- %s\n", __func__);
6458 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6459 .rpc_call_prepare = nfs4_layoutget_prepare,
6460 .rpc_call_done = nfs4_layoutget_done,
6461 .rpc_release = nfs4_layoutget_release,
6464 struct pnfs_layout_segment *
6465 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6467 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6468 size_t max_pages = max_response_pages(server);
6469 struct rpc_task *task;
6470 struct rpc_message msg = {
6471 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6472 .rpc_argp = &lgp->args,
6473 .rpc_resp = &lgp->res,
6475 struct rpc_task_setup task_setup_data = {
6476 .rpc_client = server->client,
6477 .rpc_message = &msg,
6478 .callback_ops = &nfs4_layoutget_call_ops,
6479 .callback_data = lgp,
6480 .flags = RPC_TASK_ASYNC,
6482 struct pnfs_layout_segment *lseg = NULL;
6485 dprintk("--> %s\n", __func__);
6487 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6488 if (!lgp->args.layout.pages) {
6489 nfs4_layoutget_release(lgp);
6490 return ERR_PTR(-ENOMEM);
6492 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6494 lgp->res.layoutp = &lgp->args.layout;
6495 lgp->res.seq_res.sr_slot = NULL;
6496 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6497 task = rpc_run_task(&task_setup_data);
6499 return ERR_CAST(task);
6500 status = nfs4_wait_for_completion_rpc_task(task);
6502 status = task->tk_status;
6504 lseg = pnfs_layout_process(lgp);
6506 dprintk("<-- %s status=%d\n", __func__, status);
6508 return ERR_PTR(status);
6513 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6515 struct nfs4_layoutreturn *lrp = calldata;
6517 dprintk("--> %s\n", __func__);
6518 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
6519 &lrp->res.seq_res, task))
6521 rpc_call_start(task);
6524 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6526 struct nfs4_layoutreturn *lrp = calldata;
6527 struct nfs_server *server;
6529 dprintk("--> %s\n", __func__);
6531 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6534 server = NFS_SERVER(lrp->args.inode);
6535 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6536 rpc_restart_call_prepare(task);
6539 dprintk("<-- %s\n", __func__);
6542 static void nfs4_layoutreturn_release(void *calldata)
6544 struct nfs4_layoutreturn *lrp = calldata;
6545 struct pnfs_layout_hdr *lo = lrp->args.layout;
6547 dprintk("--> %s\n", __func__);
6548 spin_lock(&lo->plh_inode->i_lock);
6549 if (lrp->res.lrs_present)
6550 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6551 lo->plh_block_lgets--;
6552 spin_unlock(&lo->plh_inode->i_lock);
6553 pnfs_put_layout_hdr(lrp->args.layout);
6555 dprintk("<-- %s\n", __func__);
6558 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6559 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6560 .rpc_call_done = nfs4_layoutreturn_done,
6561 .rpc_release = nfs4_layoutreturn_release,
6564 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6566 struct rpc_task *task;
6567 struct rpc_message msg = {
6568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6569 .rpc_argp = &lrp->args,
6570 .rpc_resp = &lrp->res,
6572 struct rpc_task_setup task_setup_data = {
6573 .rpc_client = lrp->clp->cl_rpcclient,
6574 .rpc_message = &msg,
6575 .callback_ops = &nfs4_layoutreturn_call_ops,
6576 .callback_data = lrp,
6580 dprintk("--> %s\n", __func__);
6581 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6582 task = rpc_run_task(&task_setup_data);
6584 return PTR_ERR(task);
6585 status = task->tk_status;
6586 dprintk("<-- %s status=%d\n", __func__, status);
6592 * Retrieve the list of Data Server devices from the MDS.
6594 static int _nfs4_getdevicelist(struct nfs_server *server,
6595 const struct nfs_fh *fh,
6596 struct pnfs_devicelist *devlist)
6598 struct nfs4_getdevicelist_args args = {
6600 .layoutclass = server->pnfs_curr_ld->id,
6602 struct nfs4_getdevicelist_res res = {
6605 struct rpc_message msg = {
6606 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6612 dprintk("--> %s\n", __func__);
6613 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6615 dprintk("<-- %s status=%d\n", __func__, status);
6619 int nfs4_proc_getdevicelist(struct nfs_server *server,
6620 const struct nfs_fh *fh,
6621 struct pnfs_devicelist *devlist)
6623 struct nfs4_exception exception = { };
6627 err = nfs4_handle_exception(server,
6628 _nfs4_getdevicelist(server, fh, devlist),
6630 } while (exception.retry);
6632 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6633 err, devlist->num_devs);
6637 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6640 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6642 struct nfs4_getdeviceinfo_args args = {
6645 struct nfs4_getdeviceinfo_res res = {
6648 struct rpc_message msg = {
6649 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6655 dprintk("--> %s\n", __func__);
6656 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6657 dprintk("<-- %s status=%d\n", __func__, status);
6662 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6664 struct nfs4_exception exception = { };
6668 err = nfs4_handle_exception(server,
6669 _nfs4_proc_getdeviceinfo(server, pdev),
6671 } while (exception.retry);
6674 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6676 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6678 struct nfs4_layoutcommit_data *data = calldata;
6679 struct nfs_server *server = NFS_SERVER(data->args.inode);
6681 if (nfs4_setup_sequence(server, &data->args.seq_args,
6682 &data->res.seq_res, task))
6684 rpc_call_start(task);
6688 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6690 struct nfs4_layoutcommit_data *data = calldata;
6691 struct nfs_server *server = NFS_SERVER(data->args.inode);
6693 if (!nfs4_sequence_done(task, &data->res.seq_res))
6696 switch (task->tk_status) { /* Just ignore these failures */
6697 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6698 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6699 case -NFS4ERR_BADLAYOUT: /* no layout */
6700 case -NFS4ERR_GRACE: /* loca_recalim always false */
6701 task->tk_status = 0;
6704 nfs_post_op_update_inode_force_wcc(data->args.inode,
6708 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6709 rpc_restart_call_prepare(task);
6715 static void nfs4_layoutcommit_release(void *calldata)
6717 struct nfs4_layoutcommit_data *data = calldata;
6718 struct pnfs_layout_segment *lseg, *tmp;
6719 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6721 pnfs_cleanup_layoutcommit(data);
6722 /* Matched by references in pnfs_set_layoutcommit */
6723 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6724 list_del_init(&lseg->pls_lc_list);
6725 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6727 pnfs_put_lseg(lseg);
6730 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6731 smp_mb__after_clear_bit();
6732 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6734 put_rpccred(data->cred);
6738 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6739 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6740 .rpc_call_done = nfs4_layoutcommit_done,
6741 .rpc_release = nfs4_layoutcommit_release,
6745 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6747 struct rpc_message msg = {
6748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6749 .rpc_argp = &data->args,
6750 .rpc_resp = &data->res,
6751 .rpc_cred = data->cred,
6753 struct rpc_task_setup task_setup_data = {
6754 .task = &data->task,
6755 .rpc_client = NFS_CLIENT(data->args.inode),
6756 .rpc_message = &msg,
6757 .callback_ops = &nfs4_layoutcommit_ops,
6758 .callback_data = data,
6759 .flags = RPC_TASK_ASYNC,
6761 struct rpc_task *task;
6764 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6765 "lbw: %llu inode %lu\n",
6766 data->task.tk_pid, sync,
6767 data->args.lastbytewritten,
6768 data->args.inode->i_ino);
6770 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6771 task = rpc_run_task(&task_setup_data);
6773 return PTR_ERR(task);
6776 status = nfs4_wait_for_completion_rpc_task(task);
6779 status = task->tk_status;
6781 dprintk("%s: status %d\n", __func__, status);
6787 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6788 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6790 struct nfs41_secinfo_no_name_args args = {
6791 .style = SECINFO_STYLE_CURRENT_FH,
6793 struct nfs4_secinfo_res res = {
6796 struct rpc_message msg = {
6797 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6801 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6805 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6806 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6808 struct nfs4_exception exception = { };
6811 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6814 case -NFS4ERR_WRONGSEC:
6815 case -NFS4ERR_NOTSUPP:
6818 err = nfs4_handle_exception(server, err, &exception);
6820 } while (exception.retry);
6826 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6827 struct nfs_fsinfo *info)
6831 rpc_authflavor_t flavor;
6832 struct nfs4_secinfo_flavors *flavors;
6834 page = alloc_page(GFP_KERNEL);
6840 flavors = page_address(page);
6841 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6844 * Fall back on "guess and check" method if
6845 * the server doesn't support SECINFO_NO_NAME
6847 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6848 err = nfs4_find_root_sec(server, fhandle, info);
6854 flavor = nfs_find_best_sec(flavors);
6856 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6866 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6869 struct nfs41_test_stateid_args args = {
6872 struct nfs41_test_stateid_res res;
6873 struct rpc_message msg = {
6874 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6879 dprintk("NFS call test_stateid %p\n", stateid);
6880 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6881 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6882 if (status != NFS_OK) {
6883 dprintk("NFS reply test_stateid: failed, %d\n", status);
6886 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
6891 * nfs41_test_stateid - perform a TEST_STATEID operation
6893 * @server: server / transport on which to perform the operation
6894 * @stateid: state ID to test
6896 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6897 * Otherwise a negative NFS4ERR value is returned if the operation
6898 * failed or the state ID is not currently valid.
6900 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6902 struct nfs4_exception exception = { };
6905 err = _nfs41_test_stateid(server, stateid);
6906 if (err != -NFS4ERR_DELAY)
6908 nfs4_handle_exception(server, err, &exception);
6909 } while (exception.retry);
6913 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6915 struct nfs41_free_stateid_args args = {
6918 struct nfs41_free_stateid_res res;
6919 struct rpc_message msg = {
6920 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6926 dprintk("NFS call free_stateid %p\n", stateid);
6927 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6928 status = nfs4_call_sync_sequence(server->client, server, &msg,
6929 &args.seq_args, &res.seq_res, 1);
6930 dprintk("NFS reply free_stateid: %d\n", status);
6935 * nfs41_free_stateid - perform a FREE_STATEID operation
6937 * @server: server / transport on which to perform the operation
6938 * @stateid: state ID to release
6940 * Returns NFS_OK if the server freed "stateid". Otherwise a
6941 * negative NFS4ERR value is returned.
6943 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6945 struct nfs4_exception exception = { };
6948 err = _nfs4_free_stateid(server, stateid);
6949 if (err != -NFS4ERR_DELAY)
6951 nfs4_handle_exception(server, err, &exception);
6952 } while (exception.retry);
6956 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6957 const nfs4_stateid *s2)
6959 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6962 if (s1->seqid == s2->seqid)
6964 if (s1->seqid == 0 || s2->seqid == 0)
6970 #endif /* CONFIG_NFS_V4_1 */
6972 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6973 const nfs4_stateid *s2)
6975 return nfs4_stateid_match(s1, s2);
6979 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6980 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6981 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6982 .recover_open = nfs4_open_reclaim,
6983 .recover_lock = nfs4_lock_reclaim,
6984 .establish_clid = nfs4_init_clientid,
6985 .get_clid_cred = nfs4_get_setclientid_cred,
6986 .detect_trunking = nfs40_discover_server_trunking,
6989 #if defined(CONFIG_NFS_V4_1)
6990 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6991 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6992 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6993 .recover_open = nfs4_open_reclaim,
6994 .recover_lock = nfs4_lock_reclaim,
6995 .establish_clid = nfs41_init_clientid,
6996 .get_clid_cred = nfs4_get_exchange_id_cred,
6997 .reclaim_complete = nfs41_proc_reclaim_complete,
6998 .detect_trunking = nfs41_discover_server_trunking,
7000 #endif /* CONFIG_NFS_V4_1 */
7002 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
7003 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7004 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7005 .recover_open = nfs4_open_expired,
7006 .recover_lock = nfs4_lock_expired,
7007 .establish_clid = nfs4_init_clientid,
7008 .get_clid_cred = nfs4_get_setclientid_cred,
7011 #if defined(CONFIG_NFS_V4_1)
7012 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7013 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7014 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7015 .recover_open = nfs41_open_expired,
7016 .recover_lock = nfs41_lock_expired,
7017 .establish_clid = nfs41_init_clientid,
7018 .get_clid_cred = nfs4_get_exchange_id_cred,
7020 #endif /* CONFIG_NFS_V4_1 */
7022 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
7023 .sched_state_renewal = nfs4_proc_async_renew,
7024 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
7025 .renew_lease = nfs4_proc_renew,
7028 #if defined(CONFIG_NFS_V4_1)
7029 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
7030 .sched_state_renewal = nfs41_proc_async_sequence,
7031 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
7032 .renew_lease = nfs4_proc_sequence,
7036 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7038 .call_sync = _nfs4_call_sync,
7039 .match_stateid = nfs4_match_stateid,
7040 .find_root_sec = nfs4_find_root_sec,
7041 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7042 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7043 .state_renewal_ops = &nfs40_state_renewal_ops,
7046 #if defined(CONFIG_NFS_V4_1)
7047 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7049 .call_sync = _nfs4_call_sync_session,
7050 .match_stateid = nfs41_match_stateid,
7051 .find_root_sec = nfs41_find_root_sec,
7052 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7053 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7054 .state_renewal_ops = &nfs41_state_renewal_ops,
7058 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7059 [0] = &nfs_v4_0_minor_ops,
7060 #if defined(CONFIG_NFS_V4_1)
7061 [1] = &nfs_v4_1_minor_ops,
7065 const struct inode_operations nfs4_dir_inode_operations = {
7066 .create = nfs_create,
7067 .lookup = nfs_lookup,
7068 .atomic_open = nfs_atomic_open,
7070 .unlink = nfs_unlink,
7071 .symlink = nfs_symlink,
7075 .rename = nfs_rename,
7076 .permission = nfs_permission,
7077 .getattr = nfs_getattr,
7078 .setattr = nfs_setattr,
7079 .getxattr = generic_getxattr,
7080 .setxattr = generic_setxattr,
7081 .listxattr = generic_listxattr,
7082 .removexattr = generic_removexattr,
7085 static const struct inode_operations nfs4_file_inode_operations = {
7086 .permission = nfs_permission,
7087 .getattr = nfs_getattr,
7088 .setattr = nfs_setattr,
7089 .getxattr = generic_getxattr,
7090 .setxattr = generic_setxattr,
7091 .listxattr = generic_listxattr,
7092 .removexattr = generic_removexattr,
7095 const struct nfs_rpc_ops nfs_v4_clientops = {
7096 .version = 4, /* protocol version */
7097 .dentry_ops = &nfs4_dentry_operations,
7098 .dir_inode_ops = &nfs4_dir_inode_operations,
7099 .file_inode_ops = &nfs4_file_inode_operations,
7100 .file_ops = &nfs4_file_operations,
7101 .getroot = nfs4_proc_get_root,
7102 .submount = nfs4_submount,
7103 .try_mount = nfs4_try_mount,
7104 .getattr = nfs4_proc_getattr,
7105 .setattr = nfs4_proc_setattr,
7106 .lookup = nfs4_proc_lookup,
7107 .access = nfs4_proc_access,
7108 .readlink = nfs4_proc_readlink,
7109 .create = nfs4_proc_create,
7110 .remove = nfs4_proc_remove,
7111 .unlink_setup = nfs4_proc_unlink_setup,
7112 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
7113 .unlink_done = nfs4_proc_unlink_done,
7114 .rename = nfs4_proc_rename,
7115 .rename_setup = nfs4_proc_rename_setup,
7116 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
7117 .rename_done = nfs4_proc_rename_done,
7118 .link = nfs4_proc_link,
7119 .symlink = nfs4_proc_symlink,
7120 .mkdir = nfs4_proc_mkdir,
7121 .rmdir = nfs4_proc_remove,
7122 .readdir = nfs4_proc_readdir,
7123 .mknod = nfs4_proc_mknod,
7124 .statfs = nfs4_proc_statfs,
7125 .fsinfo = nfs4_proc_fsinfo,
7126 .pathconf = nfs4_proc_pathconf,
7127 .set_capabilities = nfs4_server_capabilities,
7128 .decode_dirent = nfs4_decode_dirent,
7129 .read_setup = nfs4_proc_read_setup,
7130 .read_pageio_init = pnfs_pageio_init_read,
7131 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
7132 .read_done = nfs4_read_done,
7133 .write_setup = nfs4_proc_write_setup,
7134 .write_pageio_init = pnfs_pageio_init_write,
7135 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
7136 .write_done = nfs4_write_done,
7137 .commit_setup = nfs4_proc_commit_setup,
7138 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
7139 .commit_done = nfs4_commit_done,
7140 .lock = nfs4_proc_lock,
7141 .clear_acl_cache = nfs4_zap_acl_attr,
7142 .close_context = nfs4_close_context,
7143 .open_context = nfs4_atomic_open,
7144 .have_delegation = nfs4_have_delegation,
7145 .return_delegation = nfs4_inode_return_delegation,
7146 .alloc_client = nfs4_alloc_client,
7147 .init_client = nfs4_init_client,
7148 .free_client = nfs4_free_client,
7149 .create_server = nfs4_create_server,
7150 .clone_server = nfs_clone_server,
7153 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7154 .prefix = XATTR_NAME_NFSV4_ACL,
7155 .list = nfs4_xattr_list_nfs4_acl,
7156 .get = nfs4_xattr_get_nfs4_acl,
7157 .set = nfs4_xattr_set_nfs4_acl,
7160 const struct xattr_handler *nfs4_xattr_handlers[] = {
7161 &nfs4_xattr_nfs4_acl_handler,