4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/nfs.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs_fs.h>
49 #include <linux/nfs_page.h>
50 #include <linux/nfs_mount.h>
51 #include <linux/namei.h>
52 #include <linux/mount.h>
53 #include <linux/module.h>
54 #include <linux/nfs_idmap.h>
55 #include <linux/sunrpc/bc_xprt.h>
56 #include <linux/xattr.h>
57 #include <linux/utsname.h>
58 #include <linux/freezer.h>
61 #include "delegation.h"
68 #define NFSDBG_FACILITY NFSDBG_PROC
70 #define NFS4_POLL_RETRY_MIN (HZ/10)
71 #define NFS4_POLL_RETRY_MAX (15*HZ)
73 #define NFS4_MAX_LOOP_ON_RECOVER (10)
76 static int _nfs4_proc_open(struct nfs4_opendata *data);
77 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
78 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
79 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
80 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
81 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
82 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
83 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
84 struct nfs_fattr *fattr, struct iattr *sattr,
85 struct nfs4_state *state);
86 #ifdef CONFIG_NFS_V4_1
87 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
88 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
90 /* Prevent leaks of NFSv4 errors into userland */
91 static int nfs4_map_errors(int err)
96 case -NFS4ERR_RESOURCE:
98 case -NFS4ERR_WRONGSEC:
100 case -NFS4ERR_BADOWNER:
101 case -NFS4ERR_BADNAME:
103 case -NFS4ERR_SHARE_DENIED:
105 case -NFS4ERR_MINOR_VERS_MISMATCH:
106 return -EPROTONOSUPPORT;
107 case -NFS4ERR_ACCESS:
110 dprintk("%s could not handle NFSv4 error %d\n",
118 * This is our standard bitmap for GETATTR requests.
120 const u32 nfs4_fattr_bitmap[3] = {
122 | FATTR4_WORD0_CHANGE
125 | FATTR4_WORD0_FILEID,
127 | FATTR4_WORD1_NUMLINKS
129 | FATTR4_WORD1_OWNER_GROUP
130 | FATTR4_WORD1_RAWDEV
131 | FATTR4_WORD1_SPACE_USED
132 | FATTR4_WORD1_TIME_ACCESS
133 | FATTR4_WORD1_TIME_METADATA
134 | FATTR4_WORD1_TIME_MODIFY
137 static const u32 nfs4_pnfs_open_bitmap[3] = {
139 | FATTR4_WORD0_CHANGE
142 | FATTR4_WORD0_FILEID,
144 | FATTR4_WORD1_NUMLINKS
146 | FATTR4_WORD1_OWNER_GROUP
147 | FATTR4_WORD1_RAWDEV
148 | FATTR4_WORD1_SPACE_USED
149 | FATTR4_WORD1_TIME_ACCESS
150 | FATTR4_WORD1_TIME_METADATA
151 | FATTR4_WORD1_TIME_MODIFY,
152 FATTR4_WORD2_MDSTHRESHOLD
155 static const u32 nfs4_open_noattr_bitmap[3] = {
157 | FATTR4_WORD0_CHANGE
158 | FATTR4_WORD0_FILEID,
161 const u32 nfs4_statfs_bitmap[2] = {
162 FATTR4_WORD0_FILES_AVAIL
163 | FATTR4_WORD0_FILES_FREE
164 | FATTR4_WORD0_FILES_TOTAL,
165 FATTR4_WORD1_SPACE_AVAIL
166 | FATTR4_WORD1_SPACE_FREE
167 | FATTR4_WORD1_SPACE_TOTAL
170 const u32 nfs4_pathconf_bitmap[2] = {
172 | FATTR4_WORD0_MAXNAME,
176 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
177 | FATTR4_WORD0_MAXREAD
178 | FATTR4_WORD0_MAXWRITE
179 | FATTR4_WORD0_LEASE_TIME,
180 FATTR4_WORD1_TIME_DELTA
181 | FATTR4_WORD1_FS_LAYOUT_TYPES,
182 FATTR4_WORD2_LAYOUT_BLKSIZE
185 const u32 nfs4_fs_locations_bitmap[2] = {
187 | FATTR4_WORD0_CHANGE
190 | FATTR4_WORD0_FILEID
191 | FATTR4_WORD0_FS_LOCATIONS,
193 | FATTR4_WORD1_NUMLINKS
195 | FATTR4_WORD1_OWNER_GROUP
196 | FATTR4_WORD1_RAWDEV
197 | FATTR4_WORD1_SPACE_USED
198 | FATTR4_WORD1_TIME_ACCESS
199 | FATTR4_WORD1_TIME_METADATA
200 | FATTR4_WORD1_TIME_MODIFY
201 | FATTR4_WORD1_MOUNTED_ON_FILEID
204 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
205 struct nfs4_readdir_arg *readdir)
210 readdir->cookie = cookie;
211 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
216 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
221 * NFSv4 servers do not return entries for '.' and '..'
222 * Therefore, we fake these entries here. We let '.'
223 * have cookie 0 and '..' have cookie 1. Note that
224 * when talking to the server, we always send cookie 0
227 start = p = kmap_atomic(*readdir->pages);
230 *p++ = xdr_one; /* next */
231 *p++ = xdr_zero; /* cookie, first word */
232 *p++ = xdr_one; /* cookie, second word */
233 *p++ = xdr_one; /* entry len */
234 memcpy(p, ".\0\0\0", 4); /* entry */
236 *p++ = xdr_one; /* bitmap length */
237 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
238 *p++ = htonl(8); /* attribute buffer length */
239 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
242 *p++ = xdr_one; /* next */
243 *p++ = xdr_zero; /* cookie, first word */
244 *p++ = xdr_two; /* cookie, second word */
245 *p++ = xdr_two; /* entry len */
246 memcpy(p, "..\0\0", 4); /* entry */
248 *p++ = xdr_one; /* bitmap length */
249 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
250 *p++ = htonl(8); /* attribute buffer length */
251 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
253 readdir->pgbase = (char *)p - (char *)start;
254 readdir->count -= readdir->pgbase;
255 kunmap_atomic(start);
258 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
264 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
265 nfs_wait_bit_killable, TASK_KILLABLE);
269 if (clp->cl_cons_state < 0)
270 return clp->cl_cons_state;
274 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
281 *timeout = NFS4_POLL_RETRY_MIN;
282 if (*timeout > NFS4_POLL_RETRY_MAX)
283 *timeout = NFS4_POLL_RETRY_MAX;
284 freezable_schedule_timeout_killable(*timeout);
285 if (fatal_signal_pending(current))
291 /* This is the error handling routine for processes that are allowed
294 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
296 struct nfs_client *clp = server->nfs_client;
297 struct nfs4_state *state = exception->state;
298 struct inode *inode = exception->inode;
301 exception->retry = 0;
305 case -NFS4ERR_OPENMODE:
306 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
307 nfs4_inode_return_delegation(inode);
308 exception->retry = 1;
313 nfs4_schedule_stateid_recovery(server, state);
314 goto wait_on_recovery;
315 case -NFS4ERR_DELEG_REVOKED:
316 case -NFS4ERR_ADMIN_REVOKED:
317 case -NFS4ERR_BAD_STATEID:
320 nfs_remove_bad_delegation(state->inode);
321 nfs4_schedule_stateid_recovery(server, state);
322 goto wait_on_recovery;
323 case -NFS4ERR_EXPIRED:
325 nfs4_schedule_stateid_recovery(server, state);
326 case -NFS4ERR_STALE_STATEID:
327 case -NFS4ERR_STALE_CLIENTID:
328 nfs4_schedule_lease_recovery(clp);
329 goto wait_on_recovery;
330 #if defined(CONFIG_NFS_V4_1)
331 case -NFS4ERR_BADSESSION:
332 case -NFS4ERR_BADSLOT:
333 case -NFS4ERR_BAD_HIGH_SLOT:
334 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
335 case -NFS4ERR_DEADSESSION:
336 case -NFS4ERR_SEQ_FALSE_RETRY:
337 case -NFS4ERR_SEQ_MISORDERED:
338 dprintk("%s ERROR: %d Reset session\n", __func__,
340 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
341 goto wait_on_recovery;
342 #endif /* defined(CONFIG_NFS_V4_1) */
343 case -NFS4ERR_FILE_OPEN:
344 if (exception->timeout > HZ) {
345 /* We have retried a decent amount, time to
354 ret = nfs4_delay(server->client, &exception->timeout);
357 case -NFS4ERR_RETRY_UNCACHED_REP:
358 case -NFS4ERR_OLD_STATEID:
359 exception->retry = 1;
361 case -NFS4ERR_BADOWNER:
362 /* The following works around a Linux server bug! */
363 case -NFS4ERR_BADNAME:
364 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
365 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
366 exception->retry = 1;
367 printk(KERN_WARNING "NFS: v4 server %s "
368 "does not accept raw "
370 "Reenabling the idmapper.\n",
371 server->nfs_client->cl_hostname);
374 /* We failed to handle the error */
375 return nfs4_map_errors(ret);
377 ret = nfs4_wait_clnt_recover(clp);
379 exception->retry = 1;
384 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
386 spin_lock(&clp->cl_lock);
387 if (time_before(clp->cl_last_renewal,timestamp))
388 clp->cl_last_renewal = timestamp;
389 spin_unlock(&clp->cl_lock);
392 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
394 do_renew_lease(server->nfs_client, timestamp);
397 #if defined(CONFIG_NFS_V4_1)
400 * nfs4_free_slot - free a slot and efficiently update slot table.
402 * freeing a slot is trivially done by clearing its respective bit
404 * If the freed slotid equals highest_used_slotid we want to update it
405 * so that the server would be able to size down the slot table if needed,
406 * otherwise we know that the highest_used_slotid is still in use.
407 * When updating highest_used_slotid there may be "holes" in the bitmap
408 * so we need to scan down from highest_used_slotid to 0 looking for the now
409 * highest slotid in use.
410 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
412 * Must be called while holding tbl->slot_tbl_lock
415 nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *slot)
417 u32 slotid = slot->slot_nr;
419 /* clear used bit in bitmap */
420 __clear_bit(slotid, tbl->used_slots);
422 /* update highest_used_slotid when it is freed */
423 if (slotid == tbl->highest_used_slotid) {
424 u32 new_max = find_last_bit(tbl->used_slots, slotid);
425 if (new_max < slotid)
426 tbl->highest_used_slotid = new_max;
428 tbl->highest_used_slotid = NFS4_NO_SLOT;
430 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
431 slotid, tbl->highest_used_slotid);
434 bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
436 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
441 * Signal state manager thread if session fore channel is drained
443 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
445 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
446 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
447 nfs4_set_task_privileged, NULL);
451 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
454 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
455 complete(&ses->fc_slot_table.complete);
459 * Signal state manager thread if session back channel is drained
461 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
463 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
464 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
466 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
467 complete(&ses->bc_slot_table.complete);
470 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
472 struct nfs4_session *session;
473 struct nfs4_slot_table *tbl;
476 /* just wake up the next guy waiting since
477 * we may have not consumed a slot after all */
478 dprintk("%s: No slot\n", __func__);
481 tbl = res->sr_slot->table;
482 session = tbl->session;
484 spin_lock(&tbl->slot_tbl_lock);
485 nfs4_free_slot(tbl, res->sr_slot);
486 nfs4_check_drain_fc_complete(session);
487 spin_unlock(&tbl->slot_tbl_lock);
491 /* Update the client's idea of target_highest_slotid */
492 static void nfs41_set_target_slotid_locked(struct nfs4_slot_table *tbl,
493 u32 target_highest_slotid)
495 unsigned int max_slotid, i;
497 if (tbl->target_highest_slotid == target_highest_slotid)
499 tbl->target_highest_slotid = target_highest_slotid;
502 max_slotid = min(tbl->max_slots - 1, tbl->target_highest_slotid);
503 for (i = tbl->max_slotid + 1; i <= max_slotid; i++)
504 rpc_wake_up_next(&tbl->slot_tbl_waitq);
505 tbl->max_slotid = max_slotid;
508 void nfs41_set_target_slotid(struct nfs4_slot_table *tbl,
509 u32 target_highest_slotid)
511 spin_lock(&tbl->slot_tbl_lock);
512 nfs41_set_target_slotid_locked(tbl, target_highest_slotid);
513 spin_unlock(&tbl->slot_tbl_lock);
516 static void nfs41_set_server_slotid_locked(struct nfs4_slot_table *tbl,
519 unsigned int max_slotid, i;
521 if (tbl->server_highest_slotid == highest_slotid)
523 if (tbl->highest_used_slotid > highest_slotid)
525 max_slotid = min(tbl->max_slots - 1, highest_slotid);
526 /* Reset the seq_nr for deallocated slots */
527 for (i = tbl->server_highest_slotid + 1; i <= max_slotid; i++)
528 tbl->slots[i].seq_nr = 1;
529 tbl->server_highest_slotid = highest_slotid;
532 static void nfs41_update_target_slotid(struct nfs4_slot_table *tbl,
533 struct nfs4_slot *slot,
534 struct nfs4_sequence_res *res)
536 spin_lock(&tbl->slot_tbl_lock);
537 if (tbl->generation != slot->generation)
539 nfs41_set_server_slotid_locked(tbl, res->sr_highest_slotid);
540 nfs41_set_target_slotid_locked(tbl, res->sr_target_highest_slotid);
542 spin_unlock(&tbl->slot_tbl_lock);
545 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
547 struct nfs4_session *session;
548 struct nfs4_slot *slot;
549 unsigned long timestamp;
550 struct nfs_client *clp;
553 * sr_status remains 1 if an RPC level error occurred. The server
554 * may or may not have processed the sequence operation..
555 * Proceed as if the server received and processed the sequence
558 if (res->sr_status == 1)
559 res->sr_status = NFS_OK;
561 /* don't increment the sequence number if the task wasn't sent */
562 if (!RPC_WAS_SENT(task))
566 session = slot->table->session;
568 /* Check the SEQUENCE operation status */
569 switch (res->sr_status) {
571 /* Update the slot's sequence and clientid lease timer */
573 timestamp = slot->renewal_time;
575 do_renew_lease(clp, timestamp);
576 /* Check sequence flags */
577 if (res->sr_status_flags != 0)
578 nfs4_schedule_lease_recovery(clp);
579 nfs41_update_target_slotid(slot->table, slot, res);
582 /* The server detected a resend of the RPC call and
583 * returned NFS4ERR_DELAY as per Section 2.10.6.2
586 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
592 /* Just update the slot sequence no. */
596 /* The session may be reset by one of the error handlers. */
597 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
598 nfs41_sequence_free_slot(res);
601 if (!rpc_restart_call(task))
603 rpc_delay(task, NFS4_POLL_RETRY_MAX);
607 static int nfs4_sequence_done(struct rpc_task *task,
608 struct nfs4_sequence_res *res)
610 if (res->sr_slot == NULL)
612 return nfs41_sequence_done(task, res);
616 * nfs4_alloc_slot - efficiently look for a free slot
618 * nfs4_alloc_slot looks for an unset bit in the used_slots bitmap.
619 * If found, we mark the slot as used, update the highest_used_slotid,
620 * and respectively set up the sequence operation args.
622 * Note: must be called with under the slot_tbl_lock.
624 static struct nfs4_slot *nfs4_alloc_slot(struct nfs4_slot_table *tbl)
626 struct nfs4_slot *ret = NULL;
629 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
630 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
632 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slotid + 1);
633 if (slotid > tbl->max_slotid)
635 __set_bit(slotid, tbl->used_slots);
636 if (slotid > tbl->highest_used_slotid ||
637 tbl->highest_used_slotid == NFS4_NO_SLOT)
638 tbl->highest_used_slotid = slotid;
639 ret = &tbl->slots[slotid];
640 ret->renewal_time = jiffies;
641 ret->generation = tbl->generation;
644 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
645 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
646 ret ? ret->slot_nr : -1);
650 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
651 struct nfs4_sequence_res *res, int cache_reply)
653 args->sa_slot = NULL;
654 args->sa_cache_this = 0;
656 args->sa_cache_this = 1;
660 int nfs41_setup_sequence(struct nfs4_session *session,
661 struct nfs4_sequence_args *args,
662 struct nfs4_sequence_res *res,
663 struct rpc_task *task)
665 struct nfs4_slot *slot;
666 struct nfs4_slot_table *tbl;
668 dprintk("--> %s\n", __func__);
669 /* slot already allocated? */
670 if (res->sr_slot != NULL)
673 tbl = &session->fc_slot_table;
675 spin_lock(&tbl->slot_tbl_lock);
676 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
677 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
678 /* The state manager will wait until the slot table is empty */
679 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
680 spin_unlock(&tbl->slot_tbl_lock);
681 dprintk("%s session is draining\n", __func__);
685 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
686 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
687 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
688 spin_unlock(&tbl->slot_tbl_lock);
689 dprintk("%s enforce FIFO order\n", __func__);
693 slot = nfs4_alloc_slot(tbl);
695 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
696 spin_unlock(&tbl->slot_tbl_lock);
697 dprintk("<-- %s: no free slots\n", __func__);
700 spin_unlock(&tbl->slot_tbl_lock);
702 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
704 args->sa_slot = slot;
706 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
707 slot->slot_nr, slot->seq_nr);
710 res->sr_status_flags = 0;
712 * sr_status is only set in decode_sequence, and so will remain
713 * set to 1 if an rpc level failure occurs.
718 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
720 int nfs4_setup_sequence(const struct nfs_server *server,
721 struct nfs4_sequence_args *args,
722 struct nfs4_sequence_res *res,
723 struct rpc_task *task)
725 struct nfs4_session *session = nfs4_get_session(server);
731 dprintk("--> %s clp %p session %p sr_slot %d\n",
732 __func__, session->clp, session, res->sr_slot ?
733 res->sr_slot->slot_nr : -1);
735 ret = nfs41_setup_sequence(session, args, res, task);
737 dprintk("<-- %s status=%d\n", __func__, ret);
741 struct nfs41_call_sync_data {
742 const struct nfs_server *seq_server;
743 struct nfs4_sequence_args *seq_args;
744 struct nfs4_sequence_res *seq_res;
747 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
749 struct nfs41_call_sync_data *data = calldata;
751 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
753 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
754 data->seq_res, task))
756 rpc_call_start(task);
759 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
761 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
762 nfs41_call_sync_prepare(task, calldata);
765 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
767 struct nfs41_call_sync_data *data = calldata;
769 nfs41_sequence_done(task, data->seq_res);
772 static const struct rpc_call_ops nfs41_call_sync_ops = {
773 .rpc_call_prepare = nfs41_call_sync_prepare,
774 .rpc_call_done = nfs41_call_sync_done,
777 static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
778 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
779 .rpc_call_done = nfs41_call_sync_done,
782 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
783 struct nfs_server *server,
784 struct rpc_message *msg,
785 struct nfs4_sequence_args *args,
786 struct nfs4_sequence_res *res,
790 struct rpc_task *task;
791 struct nfs41_call_sync_data data = {
792 .seq_server = server,
796 struct rpc_task_setup task_setup = {
799 .callback_ops = &nfs41_call_sync_ops,
800 .callback_data = &data
804 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
805 task = rpc_run_task(&task_setup);
809 ret = task->tk_status;
815 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
816 struct nfs_server *server,
817 struct rpc_message *msg,
818 struct nfs4_sequence_args *args,
819 struct nfs4_sequence_res *res,
822 nfs41_init_sequence(args, res, cache_reply);
823 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
828 void nfs41_init_sequence(struct nfs4_sequence_args *args,
829 struct nfs4_sequence_res *res, int cache_reply)
833 static int nfs4_sequence_done(struct rpc_task *task,
834 struct nfs4_sequence_res *res)
838 #endif /* CONFIG_NFS_V4_1 */
840 int _nfs4_call_sync(struct rpc_clnt *clnt,
841 struct nfs_server *server,
842 struct rpc_message *msg,
843 struct nfs4_sequence_args *args,
844 struct nfs4_sequence_res *res,
847 nfs41_init_sequence(args, res, cache_reply);
848 return rpc_call_sync(clnt, msg, 0);
852 int nfs4_call_sync(struct rpc_clnt *clnt,
853 struct nfs_server *server,
854 struct rpc_message *msg,
855 struct nfs4_sequence_args *args,
856 struct nfs4_sequence_res *res,
859 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
860 args, res, cache_reply);
863 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
865 struct nfs_inode *nfsi = NFS_I(dir);
867 spin_lock(&dir->i_lock);
868 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
869 if (!cinfo->atomic || cinfo->before != dir->i_version)
870 nfs_force_lookup_revalidate(dir);
871 dir->i_version = cinfo->after;
872 spin_unlock(&dir->i_lock);
875 struct nfs4_opendata {
877 struct nfs_openargs o_arg;
878 struct nfs_openres o_res;
879 struct nfs_open_confirmargs c_arg;
880 struct nfs_open_confirmres c_res;
881 struct nfs4_string owner_name;
882 struct nfs4_string group_name;
883 struct nfs_fattr f_attr;
885 struct dentry *dentry;
886 struct nfs4_state_owner *owner;
887 struct nfs4_state *state;
889 unsigned long timestamp;
890 unsigned int rpc_done : 1;
896 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
898 p->o_res.f_attr = &p->f_attr;
899 p->o_res.seqid = p->o_arg.seqid;
900 p->c_res.seqid = p->c_arg.seqid;
901 p->o_res.server = p->o_arg.server;
902 p->o_res.access_request = p->o_arg.access;
903 nfs_fattr_init(&p->f_attr);
904 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
907 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
908 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
909 const struct iattr *attrs,
912 struct dentry *parent = dget_parent(dentry);
913 struct inode *dir = parent->d_inode;
914 struct nfs_server *server = NFS_SERVER(dir);
915 struct nfs4_opendata *p;
917 p = kzalloc(sizeof(*p), gfp_mask);
920 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
921 if (p->o_arg.seqid == NULL)
923 nfs_sb_active(dentry->d_sb);
924 p->dentry = dget(dentry);
927 atomic_inc(&sp->so_count);
928 p->o_arg.fh = NFS_FH(dir);
929 p->o_arg.open_flags = flags;
930 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
931 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
932 * will return permission denied for all bits until close */
933 if (!(flags & O_EXCL)) {
934 /* ask server to check for all possible rights as results
936 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
937 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
939 p->o_arg.clientid = server->nfs_client->cl_clientid;
940 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
941 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
942 p->o_arg.name = &dentry->d_name;
943 p->o_arg.server = server;
944 p->o_arg.bitmask = server->attr_bitmask;
945 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
946 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
947 if (attrs != NULL && attrs->ia_valid != 0) {
950 p->o_arg.u.attrs = &p->attrs;
951 memcpy(&p->attrs, attrs, sizeof(p->attrs));
954 verf[1] = current->pid;
955 memcpy(p->o_arg.u.verifier.data, verf,
956 sizeof(p->o_arg.u.verifier.data));
958 p->c_arg.fh = &p->o_res.fh;
959 p->c_arg.stateid = &p->o_res.stateid;
960 p->c_arg.seqid = p->o_arg.seqid;
961 nfs4_init_opendata_res(p);
971 static void nfs4_opendata_free(struct kref *kref)
973 struct nfs4_opendata *p = container_of(kref,
974 struct nfs4_opendata, kref);
975 struct super_block *sb = p->dentry->d_sb;
977 nfs_free_seqid(p->o_arg.seqid);
978 if (p->state != NULL)
979 nfs4_put_open_state(p->state);
980 nfs4_put_state_owner(p->owner);
984 nfs_fattr_free_names(&p->f_attr);
988 static void nfs4_opendata_put(struct nfs4_opendata *p)
991 kref_put(&p->kref, nfs4_opendata_free);
994 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
998 ret = rpc_wait_for_completion_task(task);
1002 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1006 if (open_mode & (O_EXCL|O_TRUNC))
1008 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1010 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1011 && state->n_rdonly != 0;
1014 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1015 && state->n_wronly != 0;
1017 case FMODE_READ|FMODE_WRITE:
1018 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1019 && state->n_rdwr != 0;
1025 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
1027 if (delegation == NULL)
1029 if ((delegation->type & fmode) != fmode)
1031 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1033 nfs_mark_delegation_referenced(delegation);
1037 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1046 case FMODE_READ|FMODE_WRITE:
1049 nfs4_state_set_mode_locked(state, state->state | fmode);
1052 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1054 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1055 nfs4_stateid_copy(&state->stateid, stateid);
1056 nfs4_stateid_copy(&state->open_stateid, stateid);
1059 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1062 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1064 case FMODE_READ|FMODE_WRITE:
1065 set_bit(NFS_O_RDWR_STATE, &state->flags);
1069 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1071 write_seqlock(&state->seqlock);
1072 nfs_set_open_stateid_locked(state, stateid, fmode);
1073 write_sequnlock(&state->seqlock);
1076 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1079 * Protect the call to nfs4_state_set_mode_locked and
1080 * serialise the stateid update
1082 write_seqlock(&state->seqlock);
1083 if (deleg_stateid != NULL) {
1084 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1085 set_bit(NFS_DELEGATED_STATE, &state->flags);
1087 if (open_stateid != NULL)
1088 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1089 write_sequnlock(&state->seqlock);
1090 spin_lock(&state->owner->so_lock);
1091 update_open_stateflags(state, fmode);
1092 spin_unlock(&state->owner->so_lock);
1095 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1097 struct nfs_inode *nfsi = NFS_I(state->inode);
1098 struct nfs_delegation *deleg_cur;
1101 fmode &= (FMODE_READ|FMODE_WRITE);
1104 deleg_cur = rcu_dereference(nfsi->delegation);
1105 if (deleg_cur == NULL)
1108 spin_lock(&deleg_cur->lock);
1109 if (nfsi->delegation != deleg_cur ||
1110 (deleg_cur->type & fmode) != fmode)
1111 goto no_delegation_unlock;
1113 if (delegation == NULL)
1114 delegation = &deleg_cur->stateid;
1115 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1116 goto no_delegation_unlock;
1118 nfs_mark_delegation_referenced(deleg_cur);
1119 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1121 no_delegation_unlock:
1122 spin_unlock(&deleg_cur->lock);
1126 if (!ret && open_stateid != NULL) {
1127 __update_open_stateid(state, open_stateid, NULL, fmode);
1135 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1137 struct nfs_delegation *delegation;
1140 delegation = rcu_dereference(NFS_I(inode)->delegation);
1141 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1146 nfs4_inode_return_delegation(inode);
1149 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1151 struct nfs4_state *state = opendata->state;
1152 struct nfs_inode *nfsi = NFS_I(state->inode);
1153 struct nfs_delegation *delegation;
1154 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1155 fmode_t fmode = opendata->o_arg.fmode;
1156 nfs4_stateid stateid;
1160 if (can_open_cached(state, fmode, open_mode)) {
1161 spin_lock(&state->owner->so_lock);
1162 if (can_open_cached(state, fmode, open_mode)) {
1163 update_open_stateflags(state, fmode);
1164 spin_unlock(&state->owner->so_lock);
1165 goto out_return_state;
1167 spin_unlock(&state->owner->so_lock);
1170 delegation = rcu_dereference(nfsi->delegation);
1171 if (!can_open_delegated(delegation, fmode)) {
1175 /* Save the delegation */
1176 nfs4_stateid_copy(&stateid, &delegation->stateid);
1178 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1183 /* Try to update the stateid using the delegation */
1184 if (update_open_stateid(state, NULL, &stateid, fmode))
1185 goto out_return_state;
1188 return ERR_PTR(ret);
1190 atomic_inc(&state->count);
1195 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1197 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1198 struct nfs_delegation *delegation;
1199 int delegation_flags = 0;
1202 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1204 delegation_flags = delegation->flags;
1206 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1207 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1208 "returning a delegation for "
1209 "OPEN(CLAIM_DELEGATE_CUR)\n",
1211 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1212 nfs_inode_set_delegation(state->inode,
1213 data->owner->so_cred,
1216 nfs_inode_reclaim_delegation(state->inode,
1217 data->owner->so_cred,
1222 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1223 * and update the nfs4_state.
1225 static struct nfs4_state *
1226 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1228 struct inode *inode = data->state->inode;
1229 struct nfs4_state *state = data->state;
1232 if (!data->rpc_done) {
1233 ret = data->rpc_status;
1238 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1239 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1240 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1244 state = nfs4_get_open_state(inode, data->owner);
1248 ret = nfs_refresh_inode(inode, &data->f_attr);
1252 if (data->o_res.delegation_type != 0)
1253 nfs4_opendata_check_deleg(data, state);
1254 update_open_stateid(state, &data->o_res.stateid, NULL,
1259 return ERR_PTR(ret);
1263 static struct nfs4_state *
1264 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1266 struct inode *inode;
1267 struct nfs4_state *state = NULL;
1270 if (!data->rpc_done) {
1271 state = nfs4_try_open_cached(data);
1276 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1278 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1279 ret = PTR_ERR(inode);
1283 state = nfs4_get_open_state(inode, data->owner);
1286 if (data->o_res.delegation_type != 0)
1287 nfs4_opendata_check_deleg(data, state);
1288 update_open_stateid(state, &data->o_res.stateid, NULL,
1296 return ERR_PTR(ret);
1299 static struct nfs4_state *
1300 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1302 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1303 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1304 return _nfs4_opendata_to_nfs4_state(data);
1307 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1309 struct nfs_inode *nfsi = NFS_I(state->inode);
1310 struct nfs_open_context *ctx;
1312 spin_lock(&state->inode->i_lock);
1313 list_for_each_entry(ctx, &nfsi->open_files, list) {
1314 if (ctx->state != state)
1316 get_nfs_open_context(ctx);
1317 spin_unlock(&state->inode->i_lock);
1320 spin_unlock(&state->inode->i_lock);
1321 return ERR_PTR(-ENOENT);
1324 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1326 struct nfs4_opendata *opendata;
1328 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1329 if (opendata == NULL)
1330 return ERR_PTR(-ENOMEM);
1331 opendata->state = state;
1332 atomic_inc(&state->count);
1336 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1338 struct nfs4_state *newstate;
1341 opendata->o_arg.open_flags = 0;
1342 opendata->o_arg.fmode = fmode;
1343 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1344 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1345 nfs4_init_opendata_res(opendata);
1346 ret = _nfs4_recover_proc_open(opendata);
1349 newstate = nfs4_opendata_to_nfs4_state(opendata);
1350 if (IS_ERR(newstate))
1351 return PTR_ERR(newstate);
1352 nfs4_close_state(newstate, fmode);
1357 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1359 struct nfs4_state *newstate;
1362 /* memory barrier prior to reading state->n_* */
1363 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1365 if (state->n_rdwr != 0) {
1366 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1367 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1370 if (newstate != state)
1373 if (state->n_wronly != 0) {
1374 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1375 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1378 if (newstate != state)
1381 if (state->n_rdonly != 0) {
1382 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1383 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1386 if (newstate != state)
1390 * We may have performed cached opens for all three recoveries.
1391 * Check if we need to update the current stateid.
1393 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1394 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1395 write_seqlock(&state->seqlock);
1396 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1397 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1398 write_sequnlock(&state->seqlock);
1405 * reclaim state on the server after a reboot.
1407 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1409 struct nfs_delegation *delegation;
1410 struct nfs4_opendata *opendata;
1411 fmode_t delegation_type = 0;
1414 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1415 if (IS_ERR(opendata))
1416 return PTR_ERR(opendata);
1417 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1418 opendata->o_arg.fh = NFS_FH(state->inode);
1420 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1421 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1422 delegation_type = delegation->type;
1424 opendata->o_arg.u.delegation_type = delegation_type;
1425 status = nfs4_open_recover(opendata, state);
1426 nfs4_opendata_put(opendata);
1430 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1432 struct nfs_server *server = NFS_SERVER(state->inode);
1433 struct nfs4_exception exception = { };
1436 err = _nfs4_do_open_reclaim(ctx, state);
1437 if (err != -NFS4ERR_DELAY)
1439 nfs4_handle_exception(server, err, &exception);
1440 } while (exception.retry);
1444 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1446 struct nfs_open_context *ctx;
1449 ctx = nfs4_state_find_open_context(state);
1451 return PTR_ERR(ctx);
1452 ret = nfs4_do_open_reclaim(ctx, state);
1453 put_nfs_open_context(ctx);
1457 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1459 struct nfs4_opendata *opendata;
1462 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1463 if (IS_ERR(opendata))
1464 return PTR_ERR(opendata);
1465 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1466 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1467 ret = nfs4_open_recover(opendata, state);
1468 nfs4_opendata_put(opendata);
1472 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1474 struct nfs4_exception exception = { };
1475 struct nfs_server *server = NFS_SERVER(state->inode);
1478 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1484 case -NFS4ERR_BADSESSION:
1485 case -NFS4ERR_BADSLOT:
1486 case -NFS4ERR_BAD_HIGH_SLOT:
1487 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1488 case -NFS4ERR_DEADSESSION:
1489 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1491 case -NFS4ERR_STALE_CLIENTID:
1492 case -NFS4ERR_STALE_STATEID:
1493 case -NFS4ERR_EXPIRED:
1494 /* Don't recall a delegation if it was lost */
1495 nfs4_schedule_lease_recovery(server->nfs_client);
1499 * The show must go on: exit, but mark the
1500 * stateid as needing recovery.
1502 case -NFS4ERR_DELEG_REVOKED:
1503 case -NFS4ERR_ADMIN_REVOKED:
1504 case -NFS4ERR_BAD_STATEID:
1505 nfs_inode_find_state_and_recover(state->inode,
1507 nfs4_schedule_stateid_recovery(server, state);
1510 * User RPCSEC_GSS context has expired.
1511 * We cannot recover this stateid now, so
1512 * skip it and allow recovery thread to
1519 err = nfs4_handle_exception(server, err, &exception);
1520 } while (exception.retry);
1525 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1527 struct nfs4_opendata *data = calldata;
1529 data->rpc_status = task->tk_status;
1530 if (data->rpc_status == 0) {
1531 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1532 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1533 renew_lease(data->o_res.server, data->timestamp);
1538 static void nfs4_open_confirm_release(void *calldata)
1540 struct nfs4_opendata *data = calldata;
1541 struct nfs4_state *state = NULL;
1543 /* If this request hasn't been cancelled, do nothing */
1544 if (data->cancelled == 0)
1546 /* In case of error, no cleanup! */
1547 if (!data->rpc_done)
1549 state = nfs4_opendata_to_nfs4_state(data);
1551 nfs4_close_state(state, data->o_arg.fmode);
1553 nfs4_opendata_put(data);
1556 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1557 .rpc_call_done = nfs4_open_confirm_done,
1558 .rpc_release = nfs4_open_confirm_release,
1562 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1564 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1566 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1567 struct rpc_task *task;
1568 struct rpc_message msg = {
1569 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1570 .rpc_argp = &data->c_arg,
1571 .rpc_resp = &data->c_res,
1572 .rpc_cred = data->owner->so_cred,
1574 struct rpc_task_setup task_setup_data = {
1575 .rpc_client = server->client,
1576 .rpc_message = &msg,
1577 .callback_ops = &nfs4_open_confirm_ops,
1578 .callback_data = data,
1579 .workqueue = nfsiod_workqueue,
1580 .flags = RPC_TASK_ASYNC,
1584 kref_get(&data->kref);
1586 data->rpc_status = 0;
1587 data->timestamp = jiffies;
1588 task = rpc_run_task(&task_setup_data);
1590 return PTR_ERR(task);
1591 status = nfs4_wait_for_completion_rpc_task(task);
1593 data->cancelled = 1;
1596 status = data->rpc_status;
1601 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1603 struct nfs4_opendata *data = calldata;
1604 struct nfs4_state_owner *sp = data->owner;
1606 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1609 * Check if we still need to send an OPEN call, or if we can use
1610 * a delegation instead.
1612 if (data->state != NULL) {
1613 struct nfs_delegation *delegation;
1615 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1618 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1619 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1620 can_open_delegated(delegation, data->o_arg.fmode))
1621 goto unlock_no_action;
1624 /* Update client id. */
1625 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1626 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1627 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1628 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1629 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1631 data->timestamp = jiffies;
1632 if (nfs4_setup_sequence(data->o_arg.server,
1633 &data->o_arg.seq_args,
1634 &data->o_res.seq_res,
1636 nfs_release_seqid(data->o_arg.seqid);
1638 rpc_call_start(task);
1643 task->tk_action = NULL;
1647 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1649 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1650 nfs4_open_prepare(task, calldata);
1653 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1655 struct nfs4_opendata *data = calldata;
1657 data->rpc_status = task->tk_status;
1659 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1662 if (task->tk_status == 0) {
1663 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1664 switch (data->o_res.f_attr->mode & S_IFMT) {
1668 data->rpc_status = -ELOOP;
1671 data->rpc_status = -EISDIR;
1674 data->rpc_status = -ENOTDIR;
1677 renew_lease(data->o_res.server, data->timestamp);
1678 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1679 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1684 static void nfs4_open_release(void *calldata)
1686 struct nfs4_opendata *data = calldata;
1687 struct nfs4_state *state = NULL;
1689 /* If this request hasn't been cancelled, do nothing */
1690 if (data->cancelled == 0)
1692 /* In case of error, no cleanup! */
1693 if (data->rpc_status != 0 || !data->rpc_done)
1695 /* In case we need an open_confirm, no cleanup! */
1696 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1698 state = nfs4_opendata_to_nfs4_state(data);
1700 nfs4_close_state(state, data->o_arg.fmode);
1702 nfs4_opendata_put(data);
1705 static const struct rpc_call_ops nfs4_open_ops = {
1706 .rpc_call_prepare = nfs4_open_prepare,
1707 .rpc_call_done = nfs4_open_done,
1708 .rpc_release = nfs4_open_release,
1711 static const struct rpc_call_ops nfs4_recover_open_ops = {
1712 .rpc_call_prepare = nfs4_recover_open_prepare,
1713 .rpc_call_done = nfs4_open_done,
1714 .rpc_release = nfs4_open_release,
1717 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1719 struct inode *dir = data->dir->d_inode;
1720 struct nfs_server *server = NFS_SERVER(dir);
1721 struct nfs_openargs *o_arg = &data->o_arg;
1722 struct nfs_openres *o_res = &data->o_res;
1723 struct rpc_task *task;
1724 struct rpc_message msg = {
1725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1728 .rpc_cred = data->owner->so_cred,
1730 struct rpc_task_setup task_setup_data = {
1731 .rpc_client = server->client,
1732 .rpc_message = &msg,
1733 .callback_ops = &nfs4_open_ops,
1734 .callback_data = data,
1735 .workqueue = nfsiod_workqueue,
1736 .flags = RPC_TASK_ASYNC,
1740 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1741 kref_get(&data->kref);
1743 data->rpc_status = 0;
1744 data->cancelled = 0;
1746 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1747 task = rpc_run_task(&task_setup_data);
1749 return PTR_ERR(task);
1750 status = nfs4_wait_for_completion_rpc_task(task);
1752 data->cancelled = 1;
1755 status = data->rpc_status;
1761 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1763 struct inode *dir = data->dir->d_inode;
1764 struct nfs_openres *o_res = &data->o_res;
1767 status = nfs4_run_open_task(data, 1);
1768 if (status != 0 || !data->rpc_done)
1771 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1773 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1774 status = _nfs4_proc_open_confirm(data);
1782 static int nfs4_opendata_access(struct rpc_cred *cred,
1783 struct nfs4_opendata *opendata,
1784 struct nfs4_state *state, fmode_t fmode)
1786 struct nfs_access_entry cache;
1789 /* access call failed or for some reason the server doesn't
1790 * support any access modes -- defer access call until later */
1791 if (opendata->o_res.access_supported == 0)
1795 /* don't check MAY_WRITE - a newly created file may not have
1796 * write mode bits, but POSIX allows the creating process to write */
1797 if (fmode & FMODE_READ)
1799 if (fmode & FMODE_EXEC)
1803 cache.jiffies = jiffies;
1804 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1805 nfs_access_add_cache(state->inode, &cache);
1807 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1810 /* even though OPEN succeeded, access is denied. Close the file */
1811 nfs4_close_state(state, fmode);
1816 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1818 static int _nfs4_proc_open(struct nfs4_opendata *data)
1820 struct inode *dir = data->dir->d_inode;
1821 struct nfs_server *server = NFS_SERVER(dir);
1822 struct nfs_openargs *o_arg = &data->o_arg;
1823 struct nfs_openres *o_res = &data->o_res;
1826 status = nfs4_run_open_task(data, 0);
1827 if (!data->rpc_done)
1830 if (status == -NFS4ERR_BADNAME &&
1831 !(o_arg->open_flags & O_CREAT))
1836 nfs_fattr_map_and_free_names(server, &data->f_attr);
1838 if (o_arg->open_flags & O_CREAT)
1839 update_changeattr(dir, &o_res->cinfo);
1840 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1841 server->caps &= ~NFS_CAP_POSIX_LOCK;
1842 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1843 status = _nfs4_proc_open_confirm(data);
1847 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1848 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1852 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1857 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1858 ret = nfs4_wait_clnt_recover(clp);
1861 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1862 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1864 nfs4_schedule_state_manager(clp);
1870 static int nfs4_recover_expired_lease(struct nfs_server *server)
1872 return nfs4_client_recover_expired_lease(server->nfs_client);
1877 * reclaim state on the server after a network partition.
1878 * Assumes caller holds the appropriate lock
1880 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1882 struct nfs4_opendata *opendata;
1885 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1886 if (IS_ERR(opendata))
1887 return PTR_ERR(opendata);
1888 ret = nfs4_open_recover(opendata, state);
1890 d_drop(ctx->dentry);
1891 nfs4_opendata_put(opendata);
1895 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1897 struct nfs_server *server = NFS_SERVER(state->inode);
1898 struct nfs4_exception exception = { };
1902 err = _nfs4_open_expired(ctx, state);
1906 case -NFS4ERR_GRACE:
1907 case -NFS4ERR_DELAY:
1908 nfs4_handle_exception(server, err, &exception);
1911 } while (exception.retry);
1916 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1918 struct nfs_open_context *ctx;
1921 ctx = nfs4_state_find_open_context(state);
1923 return PTR_ERR(ctx);
1924 ret = nfs4_do_open_expired(ctx, state);
1925 put_nfs_open_context(ctx);
1929 #if defined(CONFIG_NFS_V4_1)
1930 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1932 struct nfs_server *server = NFS_SERVER(state->inode);
1933 nfs4_stateid *stateid = &state->stateid;
1936 /* If a state reset has been done, test_stateid is unneeded */
1937 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1940 status = nfs41_test_stateid(server, stateid);
1941 if (status != NFS_OK) {
1942 /* Free the stateid unless the server explicitly
1943 * informs us the stateid is unrecognized. */
1944 if (status != -NFS4ERR_BAD_STATEID)
1945 nfs41_free_stateid(server, stateid);
1946 nfs_remove_bad_delegation(state->inode);
1948 write_seqlock(&state->seqlock);
1949 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1950 write_sequnlock(&state->seqlock);
1951 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1956 * nfs41_check_open_stateid - possibly free an open stateid
1958 * @state: NFSv4 state for an inode
1960 * Returns NFS_OK if recovery for this stateid is now finished.
1961 * Otherwise a negative NFS4ERR value is returned.
1963 static int nfs41_check_open_stateid(struct nfs4_state *state)
1965 struct nfs_server *server = NFS_SERVER(state->inode);
1966 nfs4_stateid *stateid = &state->open_stateid;
1969 /* If a state reset has been done, test_stateid is unneeded */
1970 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1971 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1972 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1973 return -NFS4ERR_BAD_STATEID;
1975 status = nfs41_test_stateid(server, stateid);
1976 if (status != NFS_OK) {
1977 /* Free the stateid unless the server explicitly
1978 * informs us the stateid is unrecognized. */
1979 if (status != -NFS4ERR_BAD_STATEID)
1980 nfs41_free_stateid(server, stateid);
1982 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1983 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1984 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1989 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1993 nfs41_clear_delegation_stateid(state);
1994 status = nfs41_check_open_stateid(state);
1995 if (status != NFS_OK)
1996 status = nfs4_open_expired(sp, state);
2002 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2003 * fields corresponding to attributes that were used to store the verifier.
2004 * Make sure we clobber those fields in the later setattr call
2006 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2008 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2009 !(sattr->ia_valid & ATTR_ATIME_SET))
2010 sattr->ia_valid |= ATTR_ATIME;
2012 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2013 !(sattr->ia_valid & ATTR_MTIME_SET))
2014 sattr->ia_valid |= ATTR_MTIME;
2018 * Returns a referenced nfs4_state
2020 static int _nfs4_do_open(struct inode *dir,
2021 struct dentry *dentry,
2024 struct iattr *sattr,
2025 struct rpc_cred *cred,
2026 struct nfs4_state **res,
2027 struct nfs4_threshold **ctx_th)
2029 struct nfs4_state_owner *sp;
2030 struct nfs4_state *state = NULL;
2031 struct nfs_server *server = NFS_SERVER(dir);
2032 struct nfs4_opendata *opendata;
2035 /* Protect against reboot recovery conflicts */
2037 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2039 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2042 status = nfs4_recover_expired_lease(server);
2044 goto err_put_state_owner;
2045 if (dentry->d_inode != NULL)
2046 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
2048 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
2049 if (opendata == NULL)
2050 goto err_put_state_owner;
2052 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2053 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2054 if (!opendata->f_attr.mdsthreshold)
2055 goto err_opendata_put;
2056 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2058 if (dentry->d_inode != NULL)
2059 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
2061 status = _nfs4_proc_open(opendata);
2063 goto err_opendata_put;
2065 state = nfs4_opendata_to_nfs4_state(opendata);
2066 status = PTR_ERR(state);
2068 goto err_opendata_put;
2069 if (server->caps & NFS_CAP_POSIX_LOCK)
2070 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2072 status = nfs4_opendata_access(cred, opendata, state, fmode);
2074 goto err_opendata_put;
2076 if (opendata->o_arg.open_flags & O_EXCL) {
2077 nfs4_exclusive_attrset(opendata, sattr);
2079 nfs_fattr_init(opendata->o_res.f_attr);
2080 status = nfs4_do_setattr(state->inode, cred,
2081 opendata->o_res.f_attr, sattr,
2084 nfs_setattr_update_inode(state->inode, sattr);
2085 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2088 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2089 *ctx_th = opendata->f_attr.mdsthreshold;
2091 kfree(opendata->f_attr.mdsthreshold);
2092 opendata->f_attr.mdsthreshold = NULL;
2094 nfs4_opendata_put(opendata);
2095 nfs4_put_state_owner(sp);
2099 kfree(opendata->f_attr.mdsthreshold);
2100 nfs4_opendata_put(opendata);
2101 err_put_state_owner:
2102 nfs4_put_state_owner(sp);
2109 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2110 struct dentry *dentry,
2113 struct iattr *sattr,
2114 struct rpc_cred *cred,
2115 struct nfs4_threshold **ctx_th)
2117 struct nfs4_exception exception = { };
2118 struct nfs4_state *res;
2121 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
2123 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2127 /* NOTE: BAD_SEQID means the server and client disagree about the
2128 * book-keeping w.r.t. state-changing operations
2129 * (OPEN/CLOSE/LOCK/LOCKU...)
2130 * It is actually a sign of a bug on the client or on the server.
2132 * If we receive a BAD_SEQID error in the particular case of
2133 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2134 * have unhashed the old state_owner for us, and that we can
2135 * therefore safely retry using a new one. We should still warn
2136 * the user though...
2138 if (status == -NFS4ERR_BAD_SEQID) {
2139 pr_warn_ratelimited("NFS: v4 server %s "
2140 " returned a bad sequence-id error!\n",
2141 NFS_SERVER(dir)->nfs_client->cl_hostname);
2142 exception.retry = 1;
2146 * BAD_STATEID on OPEN means that the server cancelled our
2147 * state before it received the OPEN_CONFIRM.
2148 * Recover by retrying the request as per the discussion
2149 * on Page 181 of RFC3530.
2151 if (status == -NFS4ERR_BAD_STATEID) {
2152 exception.retry = 1;
2155 if (status == -EAGAIN) {
2156 /* We must have found a delegation */
2157 exception.retry = 1;
2160 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2161 status, &exception));
2162 } while (exception.retry);
2166 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2167 struct nfs_fattr *fattr, struct iattr *sattr,
2168 struct nfs4_state *state)
2170 struct nfs_server *server = NFS_SERVER(inode);
2171 struct nfs_setattrargs arg = {
2172 .fh = NFS_FH(inode),
2175 .bitmask = server->attr_bitmask,
2177 struct nfs_setattrres res = {
2181 struct rpc_message msg = {
2182 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2187 unsigned long timestamp = jiffies;
2190 nfs_fattr_init(fattr);
2192 if (state != NULL) {
2193 struct nfs_lockowner lockowner = {
2194 .l_owner = current->files,
2195 .l_pid = current->tgid,
2197 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2199 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2201 /* Use that stateid */
2203 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2205 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2206 if (status == 0 && state != NULL)
2207 renew_lease(server, timestamp);
2211 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2212 struct nfs_fattr *fattr, struct iattr *sattr,
2213 struct nfs4_state *state)
2215 struct nfs_server *server = NFS_SERVER(inode);
2216 struct nfs4_exception exception = {
2222 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2224 case -NFS4ERR_OPENMODE:
2225 if (state && !(state->state & FMODE_WRITE)) {
2227 if (sattr->ia_valid & ATTR_OPEN)
2232 err = nfs4_handle_exception(server, err, &exception);
2233 } while (exception.retry);
2238 struct nfs4_closedata {
2239 struct inode *inode;
2240 struct nfs4_state *state;
2241 struct nfs_closeargs arg;
2242 struct nfs_closeres res;
2243 struct nfs_fattr fattr;
2244 unsigned long timestamp;
2249 static void nfs4_free_closedata(void *data)
2251 struct nfs4_closedata *calldata = data;
2252 struct nfs4_state_owner *sp = calldata->state->owner;
2253 struct super_block *sb = calldata->state->inode->i_sb;
2256 pnfs_roc_release(calldata->state->inode);
2257 nfs4_put_open_state(calldata->state);
2258 nfs_free_seqid(calldata->arg.seqid);
2259 nfs4_put_state_owner(sp);
2260 nfs_sb_deactive_async(sb);
2264 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2267 spin_lock(&state->owner->so_lock);
2268 if (!(fmode & FMODE_READ))
2269 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2270 if (!(fmode & FMODE_WRITE))
2271 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2272 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2273 spin_unlock(&state->owner->so_lock);
2276 static void nfs4_close_done(struct rpc_task *task, void *data)
2278 struct nfs4_closedata *calldata = data;
2279 struct nfs4_state *state = calldata->state;
2280 struct nfs_server *server = NFS_SERVER(calldata->inode);
2282 dprintk("%s: begin!\n", __func__);
2283 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2285 /* hmm. we are done with the inode, and in the process of freeing
2286 * the state_owner. we keep this around to process errors
2288 switch (task->tk_status) {
2291 pnfs_roc_set_barrier(state->inode,
2292 calldata->roc_barrier);
2293 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2294 renew_lease(server, calldata->timestamp);
2295 nfs4_close_clear_stateid_flags(state,
2296 calldata->arg.fmode);
2298 case -NFS4ERR_STALE_STATEID:
2299 case -NFS4ERR_OLD_STATEID:
2300 case -NFS4ERR_BAD_STATEID:
2301 case -NFS4ERR_EXPIRED:
2302 if (calldata->arg.fmode == 0)
2305 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2306 rpc_restart_call_prepare(task);
2308 nfs_release_seqid(calldata->arg.seqid);
2309 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2310 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2313 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2315 struct nfs4_closedata *calldata = data;
2316 struct nfs4_state *state = calldata->state;
2317 struct inode *inode = calldata->inode;
2320 dprintk("%s: begin!\n", __func__);
2321 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2324 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2325 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2326 spin_lock(&state->owner->so_lock);
2327 /* Calculate the change in open mode */
2328 if (state->n_rdwr == 0) {
2329 if (state->n_rdonly == 0) {
2330 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2331 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2332 calldata->arg.fmode &= ~FMODE_READ;
2334 if (state->n_wronly == 0) {
2335 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2336 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2337 calldata->arg.fmode &= ~FMODE_WRITE;
2340 spin_unlock(&state->owner->so_lock);
2343 /* Note: exit _without_ calling nfs4_close_done */
2344 task->tk_action = NULL;
2348 if (calldata->arg.fmode == 0) {
2349 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2350 if (calldata->roc &&
2351 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
2355 nfs_fattr_init(calldata->res.fattr);
2356 calldata->timestamp = jiffies;
2357 if (nfs4_setup_sequence(NFS_SERVER(inode),
2358 &calldata->arg.seq_args,
2359 &calldata->res.seq_res,
2361 nfs_release_seqid(calldata->arg.seqid);
2363 rpc_call_start(task);
2365 dprintk("%s: done!\n", __func__);
2368 static const struct rpc_call_ops nfs4_close_ops = {
2369 .rpc_call_prepare = nfs4_close_prepare,
2370 .rpc_call_done = nfs4_close_done,
2371 .rpc_release = nfs4_free_closedata,
2375 * It is possible for data to be read/written from a mem-mapped file
2376 * after the sys_close call (which hits the vfs layer as a flush).
2377 * This means that we can't safely call nfsv4 close on a file until
2378 * the inode is cleared. This in turn means that we are not good
2379 * NFSv4 citizens - we do not indicate to the server to update the file's
2380 * share state even when we are done with one of the three share
2381 * stateid's in the inode.
2383 * NOTE: Caller must be holding the sp->so_owner semaphore!
2385 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2387 struct nfs_server *server = NFS_SERVER(state->inode);
2388 struct nfs4_closedata *calldata;
2389 struct nfs4_state_owner *sp = state->owner;
2390 struct rpc_task *task;
2391 struct rpc_message msg = {
2392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2393 .rpc_cred = state->owner->so_cred,
2395 struct rpc_task_setup task_setup_data = {
2396 .rpc_client = server->client,
2397 .rpc_message = &msg,
2398 .callback_ops = &nfs4_close_ops,
2399 .workqueue = nfsiod_workqueue,
2400 .flags = RPC_TASK_ASYNC,
2402 int status = -ENOMEM;
2404 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2405 if (calldata == NULL)
2407 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2408 calldata->inode = state->inode;
2409 calldata->state = state;
2410 calldata->arg.fh = NFS_FH(state->inode);
2411 calldata->arg.stateid = &state->open_stateid;
2412 /* Serialization for the sequence id */
2413 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2414 if (calldata->arg.seqid == NULL)
2415 goto out_free_calldata;
2416 calldata->arg.fmode = 0;
2417 calldata->arg.bitmask = server->cache_consistency_bitmask;
2418 calldata->res.fattr = &calldata->fattr;
2419 calldata->res.seqid = calldata->arg.seqid;
2420 calldata->res.server = server;
2421 calldata->roc = pnfs_roc(state->inode);
2422 nfs_sb_active(calldata->inode->i_sb);
2424 msg.rpc_argp = &calldata->arg;
2425 msg.rpc_resp = &calldata->res;
2426 task_setup_data.callback_data = calldata;
2427 task = rpc_run_task(&task_setup_data);
2429 return PTR_ERR(task);
2432 status = rpc_wait_for_completion_task(task);
2438 nfs4_put_open_state(state);
2439 nfs4_put_state_owner(sp);
2443 static struct inode *
2444 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2446 struct nfs4_state *state;
2448 /* Protect against concurrent sillydeletes */
2449 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2450 ctx->cred, &ctx->mdsthreshold);
2452 return ERR_CAST(state);
2454 return igrab(state->inode);
2457 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2459 if (ctx->state == NULL)
2462 nfs4_close_sync(ctx->state, ctx->mode);
2464 nfs4_close_state(ctx->state, ctx->mode);
2467 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2469 struct nfs4_server_caps_arg args = {
2472 struct nfs4_server_caps_res res = {};
2473 struct rpc_message msg = {
2474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2480 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2482 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2483 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2484 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2485 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2486 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2487 NFS_CAP_CTIME|NFS_CAP_MTIME);
2488 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2489 server->caps |= NFS_CAP_ACLS;
2490 if (res.has_links != 0)
2491 server->caps |= NFS_CAP_HARDLINKS;
2492 if (res.has_symlinks != 0)
2493 server->caps |= NFS_CAP_SYMLINKS;
2494 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2495 server->caps |= NFS_CAP_FILEID;
2496 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2497 server->caps |= NFS_CAP_MODE;
2498 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2499 server->caps |= NFS_CAP_NLINK;
2500 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2501 server->caps |= NFS_CAP_OWNER;
2502 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2503 server->caps |= NFS_CAP_OWNER_GROUP;
2504 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2505 server->caps |= NFS_CAP_ATIME;
2506 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2507 server->caps |= NFS_CAP_CTIME;
2508 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2509 server->caps |= NFS_CAP_MTIME;
2511 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2512 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2513 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2514 server->acl_bitmask = res.acl_bitmask;
2515 server->fh_expire_type = res.fh_expire_type;
2521 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2523 struct nfs4_exception exception = { };
2526 err = nfs4_handle_exception(server,
2527 _nfs4_server_capabilities(server, fhandle),
2529 } while (exception.retry);
2533 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2534 struct nfs_fsinfo *info)
2536 struct nfs4_lookup_root_arg args = {
2537 .bitmask = nfs4_fattr_bitmap,
2539 struct nfs4_lookup_res res = {
2541 .fattr = info->fattr,
2544 struct rpc_message msg = {
2545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2550 nfs_fattr_init(info->fattr);
2551 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2554 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2555 struct nfs_fsinfo *info)
2557 struct nfs4_exception exception = { };
2560 err = _nfs4_lookup_root(server, fhandle, info);
2563 case -NFS4ERR_WRONGSEC:
2566 err = nfs4_handle_exception(server, err, &exception);
2568 } while (exception.retry);
2573 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2574 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2576 struct rpc_auth *auth;
2579 auth = rpcauth_create(flavor, server->client);
2584 ret = nfs4_lookup_root(server, fhandle, info);
2589 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2590 struct nfs_fsinfo *info)
2592 int i, len, status = 0;
2593 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2595 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2599 for (i = 0; i < len; i++) {
2600 /* AUTH_UNIX is the default flavor if none was specified,
2601 * thus has already been tried. */
2602 if (flav_array[i] == RPC_AUTH_UNIX)
2605 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2606 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2611 * -EACCESS could mean that the user doesn't have correct permissions
2612 * to access the mount. It could also mean that we tried to mount
2613 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2614 * existing mount programs don't handle -EACCES very well so it should
2615 * be mapped to -EPERM instead.
2617 if (status == -EACCES)
2623 * get the file handle for the "/" directory on the server
2625 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2626 struct nfs_fsinfo *info)
2628 int minor_version = server->nfs_client->cl_minorversion;
2629 int status = nfs4_lookup_root(server, fhandle, info);
2630 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2632 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2633 * by nfs4_map_errors() as this function exits.
2635 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2637 status = nfs4_server_capabilities(server, fhandle);
2639 status = nfs4_do_fsinfo(server, fhandle, info);
2640 return nfs4_map_errors(status);
2643 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2644 struct nfs_fsinfo *info)
2647 struct nfs_fattr *fattr = info->fattr;
2649 error = nfs4_server_capabilities(server, mntfh);
2651 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2655 error = nfs4_proc_getattr(server, mntfh, fattr);
2657 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2661 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2662 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2663 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2669 * Get locations and (maybe) other attributes of a referral.
2670 * Note that we'll actually follow the referral later when
2671 * we detect fsid mismatch in inode revalidation
2673 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2674 const struct qstr *name, struct nfs_fattr *fattr,
2675 struct nfs_fh *fhandle)
2677 int status = -ENOMEM;
2678 struct page *page = NULL;
2679 struct nfs4_fs_locations *locations = NULL;
2681 page = alloc_page(GFP_KERNEL);
2684 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2685 if (locations == NULL)
2688 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2691 /* Make sure server returned a different fsid for the referral */
2692 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2693 dprintk("%s: server did not return a different fsid for"
2694 " a referral at %s\n", __func__, name->name);
2698 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2699 nfs_fixup_referral_attributes(&locations->fattr);
2701 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2702 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2703 memset(fhandle, 0, sizeof(struct nfs_fh));
2711 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2713 struct nfs4_getattr_arg args = {
2715 .bitmask = server->attr_bitmask,
2717 struct nfs4_getattr_res res = {
2721 struct rpc_message msg = {
2722 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2727 nfs_fattr_init(fattr);
2728 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2731 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2733 struct nfs4_exception exception = { };
2736 err = nfs4_handle_exception(server,
2737 _nfs4_proc_getattr(server, fhandle, fattr),
2739 } while (exception.retry);
2744 * The file is not closed if it is opened due to the a request to change
2745 * the size of the file. The open call will not be needed once the
2746 * VFS layer lookup-intents are implemented.
2748 * Close is called when the inode is destroyed.
2749 * If we haven't opened the file for O_WRONLY, we
2750 * need to in the size_change case to obtain a stateid.
2753 * Because OPEN is always done by name in nfsv4, it is
2754 * possible that we opened a different file by the same
2755 * name. We can recognize this race condition, but we
2756 * can't do anything about it besides returning an error.
2758 * This will be fixed with VFS changes (lookup-intent).
2761 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2762 struct iattr *sattr)
2764 struct inode *inode = dentry->d_inode;
2765 struct rpc_cred *cred = NULL;
2766 struct nfs4_state *state = NULL;
2769 if (pnfs_ld_layoutret_on_setattr(inode))
2770 pnfs_return_layout(inode);
2772 nfs_fattr_init(fattr);
2774 /* Deal with open(O_TRUNC) */
2775 if (sattr->ia_valid & ATTR_OPEN)
2776 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2778 /* Optimization: if the end result is no change, don't RPC */
2779 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2782 /* Search for an existing open(O_WRITE) file */
2783 if (sattr->ia_valid & ATTR_FILE) {
2784 struct nfs_open_context *ctx;
2786 ctx = nfs_file_open_context(sattr->ia_file);
2793 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2795 nfs_setattr_update_inode(inode, sattr);
2799 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2800 const struct qstr *name, struct nfs_fh *fhandle,
2801 struct nfs_fattr *fattr)
2803 struct nfs_server *server = NFS_SERVER(dir);
2805 struct nfs4_lookup_arg args = {
2806 .bitmask = server->attr_bitmask,
2807 .dir_fh = NFS_FH(dir),
2810 struct nfs4_lookup_res res = {
2815 struct rpc_message msg = {
2816 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2821 nfs_fattr_init(fattr);
2823 dprintk("NFS call lookup %s\n", name->name);
2824 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2825 dprintk("NFS reply lookup: %d\n", status);
2829 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2831 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2832 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2833 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2837 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2838 struct qstr *name, struct nfs_fh *fhandle,
2839 struct nfs_fattr *fattr)
2841 struct nfs4_exception exception = { };
2842 struct rpc_clnt *client = *clnt;
2845 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2847 case -NFS4ERR_BADNAME:
2850 case -NFS4ERR_MOVED:
2851 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2853 case -NFS4ERR_WRONGSEC:
2855 if (client != *clnt)
2858 client = nfs4_create_sec_client(client, dir, name);
2860 return PTR_ERR(client);
2862 exception.retry = 1;
2865 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2867 } while (exception.retry);
2872 else if (client != *clnt)
2873 rpc_shutdown_client(client);
2878 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2879 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2882 struct rpc_clnt *client = NFS_CLIENT(dir);
2884 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2885 if (client != NFS_CLIENT(dir)) {
2886 rpc_shutdown_client(client);
2887 nfs_fixup_secinfo_attributes(fattr);
2893 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2894 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2897 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2899 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2901 rpc_shutdown_client(client);
2902 return ERR_PTR(status);
2907 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2909 struct nfs_server *server = NFS_SERVER(inode);
2910 struct nfs4_accessargs args = {
2911 .fh = NFS_FH(inode),
2912 .bitmask = server->cache_consistency_bitmask,
2914 struct nfs4_accessres res = {
2917 struct rpc_message msg = {
2918 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2921 .rpc_cred = entry->cred,
2923 int mode = entry->mask;
2927 * Determine which access bits we want to ask for...
2929 if (mode & MAY_READ)
2930 args.access |= NFS4_ACCESS_READ;
2931 if (S_ISDIR(inode->i_mode)) {
2932 if (mode & MAY_WRITE)
2933 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2934 if (mode & MAY_EXEC)
2935 args.access |= NFS4_ACCESS_LOOKUP;
2937 if (mode & MAY_WRITE)
2938 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2939 if (mode & MAY_EXEC)
2940 args.access |= NFS4_ACCESS_EXECUTE;
2943 res.fattr = nfs_alloc_fattr();
2944 if (res.fattr == NULL)
2947 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2949 nfs_access_set_mask(entry, res.access);
2950 nfs_refresh_inode(inode, res.fattr);
2952 nfs_free_fattr(res.fattr);
2956 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2958 struct nfs4_exception exception = { };
2961 err = nfs4_handle_exception(NFS_SERVER(inode),
2962 _nfs4_proc_access(inode, entry),
2964 } while (exception.retry);
2969 * TODO: For the time being, we don't try to get any attributes
2970 * along with any of the zero-copy operations READ, READDIR,
2973 * In the case of the first three, we want to put the GETATTR
2974 * after the read-type operation -- this is because it is hard
2975 * to predict the length of a GETATTR response in v4, and thus
2976 * align the READ data correctly. This means that the GETATTR
2977 * may end up partially falling into the page cache, and we should
2978 * shift it into the 'tail' of the xdr_buf before processing.
2979 * To do this efficiently, we need to know the total length
2980 * of data received, which doesn't seem to be available outside
2983 * In the case of WRITE, we also want to put the GETATTR after
2984 * the operation -- in this case because we want to make sure
2985 * we get the post-operation mtime and size.
2987 * Both of these changes to the XDR layer would in fact be quite
2988 * minor, but I decided to leave them for a subsequent patch.
2990 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2991 unsigned int pgbase, unsigned int pglen)
2993 struct nfs4_readlink args = {
2994 .fh = NFS_FH(inode),
2999 struct nfs4_readlink_res res;
3000 struct rpc_message msg = {
3001 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3006 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3009 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3010 unsigned int pgbase, unsigned int pglen)
3012 struct nfs4_exception exception = { };
3015 err = nfs4_handle_exception(NFS_SERVER(inode),
3016 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3018 } while (exception.retry);
3023 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3026 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3029 struct nfs_open_context *ctx;
3030 struct nfs4_state *state;
3033 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3035 return PTR_ERR(ctx);
3037 sattr->ia_mode &= ~current_umask();
3038 state = nfs4_do_open(dir, dentry, ctx->mode,
3039 flags, sattr, ctx->cred,
3040 &ctx->mdsthreshold);
3042 if (IS_ERR(state)) {
3043 status = PTR_ERR(state);
3046 d_add(dentry, igrab(state->inode));
3047 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
3050 put_nfs_open_context(ctx);
3054 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3056 struct nfs_server *server = NFS_SERVER(dir);
3057 struct nfs_removeargs args = {
3061 struct nfs_removeres res = {
3064 struct rpc_message msg = {
3065 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3071 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3073 update_changeattr(dir, &res.cinfo);
3077 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3079 struct nfs4_exception exception = { };
3082 err = nfs4_handle_exception(NFS_SERVER(dir),
3083 _nfs4_proc_remove(dir, name),
3085 } while (exception.retry);
3089 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3091 struct nfs_server *server = NFS_SERVER(dir);
3092 struct nfs_removeargs *args = msg->rpc_argp;
3093 struct nfs_removeres *res = msg->rpc_resp;
3095 res->server = server;
3096 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3097 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
3100 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3102 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
3103 &data->args.seq_args,
3107 rpc_call_start(task);
3110 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3112 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3114 if (!nfs4_sequence_done(task, &res->seq_res))
3116 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3118 update_changeattr(dir, &res->cinfo);
3122 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3124 struct nfs_server *server = NFS_SERVER(dir);
3125 struct nfs_renameargs *arg = msg->rpc_argp;
3126 struct nfs_renameres *res = msg->rpc_resp;
3128 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3129 res->server = server;
3130 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
3133 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3135 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3136 &data->args.seq_args,
3140 rpc_call_start(task);
3143 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3144 struct inode *new_dir)
3146 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3148 if (!nfs4_sequence_done(task, &res->seq_res))
3150 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3153 update_changeattr(old_dir, &res->old_cinfo);
3154 update_changeattr(new_dir, &res->new_cinfo);
3158 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3159 struct inode *new_dir, struct qstr *new_name)
3161 struct nfs_server *server = NFS_SERVER(old_dir);
3162 struct nfs_renameargs arg = {
3163 .old_dir = NFS_FH(old_dir),
3164 .new_dir = NFS_FH(new_dir),
3165 .old_name = old_name,
3166 .new_name = new_name,
3168 struct nfs_renameres res = {
3171 struct rpc_message msg = {
3172 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3176 int status = -ENOMEM;
3178 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3180 update_changeattr(old_dir, &res.old_cinfo);
3181 update_changeattr(new_dir, &res.new_cinfo);
3186 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3187 struct inode *new_dir, struct qstr *new_name)
3189 struct nfs4_exception exception = { };
3192 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3193 _nfs4_proc_rename(old_dir, old_name,
3196 } while (exception.retry);
3200 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3202 struct nfs_server *server = NFS_SERVER(inode);
3203 struct nfs4_link_arg arg = {
3204 .fh = NFS_FH(inode),
3205 .dir_fh = NFS_FH(dir),
3207 .bitmask = server->attr_bitmask,
3209 struct nfs4_link_res res = {
3212 struct rpc_message msg = {
3213 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3217 int status = -ENOMEM;
3219 res.fattr = nfs_alloc_fattr();
3220 if (res.fattr == NULL)
3223 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3225 update_changeattr(dir, &res.cinfo);
3226 nfs_post_op_update_inode(inode, res.fattr);
3229 nfs_free_fattr(res.fattr);
3233 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3235 struct nfs4_exception exception = { };
3238 err = nfs4_handle_exception(NFS_SERVER(inode),
3239 _nfs4_proc_link(inode, dir, name),
3241 } while (exception.retry);
3245 struct nfs4_createdata {
3246 struct rpc_message msg;
3247 struct nfs4_create_arg arg;
3248 struct nfs4_create_res res;
3250 struct nfs_fattr fattr;
3253 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3254 struct qstr *name, struct iattr *sattr, u32 ftype)
3256 struct nfs4_createdata *data;
3258 data = kzalloc(sizeof(*data), GFP_KERNEL);
3260 struct nfs_server *server = NFS_SERVER(dir);
3262 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3263 data->msg.rpc_argp = &data->arg;
3264 data->msg.rpc_resp = &data->res;
3265 data->arg.dir_fh = NFS_FH(dir);
3266 data->arg.server = server;
3267 data->arg.name = name;
3268 data->arg.attrs = sattr;
3269 data->arg.ftype = ftype;
3270 data->arg.bitmask = server->attr_bitmask;
3271 data->res.server = server;
3272 data->res.fh = &data->fh;
3273 data->res.fattr = &data->fattr;
3274 nfs_fattr_init(data->res.fattr);
3279 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3281 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3282 &data->arg.seq_args, &data->res.seq_res, 1);
3284 update_changeattr(dir, &data->res.dir_cinfo);
3285 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3290 static void nfs4_free_createdata(struct nfs4_createdata *data)
3295 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3296 struct page *page, unsigned int len, struct iattr *sattr)
3298 struct nfs4_createdata *data;
3299 int status = -ENAMETOOLONG;
3301 if (len > NFS4_MAXPATHLEN)
3305 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3309 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3310 data->arg.u.symlink.pages = &page;
3311 data->arg.u.symlink.len = len;
3313 status = nfs4_do_create(dir, dentry, data);
3315 nfs4_free_createdata(data);
3320 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3321 struct page *page, unsigned int len, struct iattr *sattr)
3323 struct nfs4_exception exception = { };
3326 err = nfs4_handle_exception(NFS_SERVER(dir),
3327 _nfs4_proc_symlink(dir, dentry, page,
3330 } while (exception.retry);
3334 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3335 struct iattr *sattr)
3337 struct nfs4_createdata *data;
3338 int status = -ENOMEM;
3340 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3344 status = nfs4_do_create(dir, dentry, data);
3346 nfs4_free_createdata(data);
3351 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3352 struct iattr *sattr)
3354 struct nfs4_exception exception = { };
3357 sattr->ia_mode &= ~current_umask();
3359 err = nfs4_handle_exception(NFS_SERVER(dir),
3360 _nfs4_proc_mkdir(dir, dentry, sattr),
3362 } while (exception.retry);
3366 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3367 u64 cookie, struct page **pages, unsigned int count, int plus)
3369 struct inode *dir = dentry->d_inode;
3370 struct nfs4_readdir_arg args = {
3375 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3378 struct nfs4_readdir_res res;
3379 struct rpc_message msg = {
3380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3387 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3388 dentry->d_parent->d_name.name,
3389 dentry->d_name.name,
3390 (unsigned long long)cookie);
3391 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3392 res.pgbase = args.pgbase;
3393 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3395 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3396 status += args.pgbase;
3399 nfs_invalidate_atime(dir);
3401 dprintk("%s: returns %d\n", __func__, status);
3405 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3406 u64 cookie, struct page **pages, unsigned int count, int plus)
3408 struct nfs4_exception exception = { };
3411 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3412 _nfs4_proc_readdir(dentry, cred, cookie,
3413 pages, count, plus),
3415 } while (exception.retry);
3419 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3420 struct iattr *sattr, dev_t rdev)
3422 struct nfs4_createdata *data;
3423 int mode = sattr->ia_mode;
3424 int status = -ENOMEM;
3426 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3431 data->arg.ftype = NF4FIFO;
3432 else if (S_ISBLK(mode)) {
3433 data->arg.ftype = NF4BLK;
3434 data->arg.u.device.specdata1 = MAJOR(rdev);
3435 data->arg.u.device.specdata2 = MINOR(rdev);
3437 else if (S_ISCHR(mode)) {
3438 data->arg.ftype = NF4CHR;
3439 data->arg.u.device.specdata1 = MAJOR(rdev);
3440 data->arg.u.device.specdata2 = MINOR(rdev);
3441 } else if (!S_ISSOCK(mode)) {
3446 status = nfs4_do_create(dir, dentry, data);
3448 nfs4_free_createdata(data);
3453 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3454 struct iattr *sattr, dev_t rdev)
3456 struct nfs4_exception exception = { };
3459 sattr->ia_mode &= ~current_umask();
3461 err = nfs4_handle_exception(NFS_SERVER(dir),
3462 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3464 } while (exception.retry);
3468 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3469 struct nfs_fsstat *fsstat)
3471 struct nfs4_statfs_arg args = {
3473 .bitmask = server->attr_bitmask,
3475 struct nfs4_statfs_res res = {
3478 struct rpc_message msg = {
3479 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3484 nfs_fattr_init(fsstat->fattr);
3485 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3488 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3490 struct nfs4_exception exception = { };
3493 err = nfs4_handle_exception(server,
3494 _nfs4_proc_statfs(server, fhandle, fsstat),
3496 } while (exception.retry);
3500 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3501 struct nfs_fsinfo *fsinfo)
3503 struct nfs4_fsinfo_arg args = {
3505 .bitmask = server->attr_bitmask,
3507 struct nfs4_fsinfo_res res = {
3510 struct rpc_message msg = {
3511 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3516 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3519 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3521 struct nfs4_exception exception = { };
3525 err = nfs4_handle_exception(server,
3526 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3528 } while (exception.retry);
3532 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3536 nfs_fattr_init(fsinfo->fattr);
3537 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3539 /* block layout checks this! */
3540 server->pnfs_blksize = fsinfo->blksize;
3541 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3547 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3548 struct nfs_pathconf *pathconf)
3550 struct nfs4_pathconf_arg args = {
3552 .bitmask = server->attr_bitmask,
3554 struct nfs4_pathconf_res res = {
3555 .pathconf = pathconf,
3557 struct rpc_message msg = {
3558 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3563 /* None of the pathconf attributes are mandatory to implement */
3564 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3565 memset(pathconf, 0, sizeof(*pathconf));
3569 nfs_fattr_init(pathconf->fattr);
3570 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3573 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3574 struct nfs_pathconf *pathconf)
3576 struct nfs4_exception exception = { };
3580 err = nfs4_handle_exception(server,
3581 _nfs4_proc_pathconf(server, fhandle, pathconf),
3583 } while (exception.retry);
3587 void __nfs4_read_done_cb(struct nfs_read_data *data)
3589 nfs_invalidate_atime(data->header->inode);
3592 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3594 struct nfs_server *server = NFS_SERVER(data->header->inode);
3596 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3597 rpc_restart_call_prepare(task);
3601 __nfs4_read_done_cb(data);
3602 if (task->tk_status > 0)
3603 renew_lease(server, data->timestamp);
3607 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3610 dprintk("--> %s\n", __func__);
3612 if (!nfs4_sequence_done(task, &data->res.seq_res))
3615 return data->read_done_cb ? data->read_done_cb(task, data) :
3616 nfs4_read_done_cb(task, data);
3619 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3621 data->timestamp = jiffies;
3622 data->read_done_cb = nfs4_read_done_cb;
3623 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3624 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3627 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3629 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3630 &data->args.seq_args,
3634 rpc_call_start(task);
3637 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3639 struct inode *inode = data->header->inode;
3641 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3642 rpc_restart_call_prepare(task);
3645 if (task->tk_status >= 0) {
3646 renew_lease(NFS_SERVER(inode), data->timestamp);
3647 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3652 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3654 if (!nfs4_sequence_done(task, &data->res.seq_res))
3656 return data->write_done_cb ? data->write_done_cb(task, data) :
3657 nfs4_write_done_cb(task, data);
3661 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3663 const struct nfs_pgio_header *hdr = data->header;
3665 /* Don't request attributes for pNFS or O_DIRECT writes */
3666 if (data->ds_clp != NULL || hdr->dreq != NULL)
3668 /* Otherwise, request attributes if and only if we don't hold
3671 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3674 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3676 struct nfs_server *server = NFS_SERVER(data->header->inode);
3678 if (!nfs4_write_need_cache_consistency_data(data)) {
3679 data->args.bitmask = NULL;
3680 data->res.fattr = NULL;
3682 data->args.bitmask = server->cache_consistency_bitmask;
3684 if (!data->write_done_cb)
3685 data->write_done_cb = nfs4_write_done_cb;
3686 data->res.server = server;
3687 data->timestamp = jiffies;
3689 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3690 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3693 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3695 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3696 &data->args.seq_args,
3700 rpc_call_start(task);
3703 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3705 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3706 &data->args.seq_args,
3710 rpc_call_start(task);
3713 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3715 struct inode *inode = data->inode;
3717 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3718 rpc_restart_call_prepare(task);
3724 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3726 if (!nfs4_sequence_done(task, &data->res.seq_res))
3728 return data->commit_done_cb(task, data);
3731 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3733 struct nfs_server *server = NFS_SERVER(data->inode);
3735 if (data->commit_done_cb == NULL)
3736 data->commit_done_cb = nfs4_commit_done_cb;
3737 data->res.server = server;
3738 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3739 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3742 struct nfs4_renewdata {
3743 struct nfs_client *client;
3744 unsigned long timestamp;
3748 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3749 * standalone procedure for queueing an asynchronous RENEW.
3751 static void nfs4_renew_release(void *calldata)
3753 struct nfs4_renewdata *data = calldata;
3754 struct nfs_client *clp = data->client;
3756 if (atomic_read(&clp->cl_count) > 1)
3757 nfs4_schedule_state_renewal(clp);
3758 nfs_put_client(clp);
3762 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3764 struct nfs4_renewdata *data = calldata;
3765 struct nfs_client *clp = data->client;
3766 unsigned long timestamp = data->timestamp;
3768 if (task->tk_status < 0) {
3769 /* Unless we're shutting down, schedule state recovery! */
3770 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3772 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3773 nfs4_schedule_lease_recovery(clp);
3776 nfs4_schedule_path_down_recovery(clp);
3778 do_renew_lease(clp, timestamp);
3781 static const struct rpc_call_ops nfs4_renew_ops = {
3782 .rpc_call_done = nfs4_renew_done,
3783 .rpc_release = nfs4_renew_release,
3786 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3788 struct rpc_message msg = {
3789 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3793 struct nfs4_renewdata *data;
3795 if (renew_flags == 0)
3797 if (!atomic_inc_not_zero(&clp->cl_count))
3799 data = kmalloc(sizeof(*data), GFP_NOFS);
3803 data->timestamp = jiffies;
3804 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3805 &nfs4_renew_ops, data);
3808 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3810 struct rpc_message msg = {
3811 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3815 unsigned long now = jiffies;
3818 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3821 do_renew_lease(clp, now);
3825 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3827 return (server->caps & NFS_CAP_ACLS)
3828 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3829 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3832 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3833 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3836 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3838 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3839 struct page **pages, unsigned int *pgbase)
3841 struct page *newpage, **spages;
3847 len = min_t(size_t, PAGE_SIZE, buflen);
3848 newpage = alloc_page(GFP_KERNEL);
3850 if (newpage == NULL)
3852 memcpy(page_address(newpage), buf, len);
3857 } while (buflen != 0);
3863 __free_page(spages[rc-1]);
3867 struct nfs4_cached_acl {
3873 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3875 struct nfs_inode *nfsi = NFS_I(inode);
3877 spin_lock(&inode->i_lock);
3878 kfree(nfsi->nfs4_acl);
3879 nfsi->nfs4_acl = acl;
3880 spin_unlock(&inode->i_lock);
3883 static void nfs4_zap_acl_attr(struct inode *inode)
3885 nfs4_set_cached_acl(inode, NULL);
3888 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3890 struct nfs_inode *nfsi = NFS_I(inode);
3891 struct nfs4_cached_acl *acl;
3894 spin_lock(&inode->i_lock);
3895 acl = nfsi->nfs4_acl;
3898 if (buf == NULL) /* user is just asking for length */
3900 if (acl->cached == 0)
3902 ret = -ERANGE; /* see getxattr(2) man page */
3903 if (acl->len > buflen)
3905 memcpy(buf, acl->data, acl->len);
3909 spin_unlock(&inode->i_lock);
3913 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3915 struct nfs4_cached_acl *acl;
3916 size_t buflen = sizeof(*acl) + acl_len;
3918 if (buflen <= PAGE_SIZE) {
3919 acl = kmalloc(buflen, GFP_KERNEL);
3923 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3925 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3932 nfs4_set_cached_acl(inode, acl);
3936 * The getxattr API returns the required buffer length when called with a
3937 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3938 * the required buf. On a NULL buf, we send a page of data to the server
3939 * guessing that the ACL request can be serviced by a page. If so, we cache
3940 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3941 * the cache. If not so, we throw away the page, and cache the required
3942 * length. The next getxattr call will then produce another round trip to
3943 * the server, this time with the input buf of the required size.
3945 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3947 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3948 struct nfs_getaclargs args = {
3949 .fh = NFS_FH(inode),
3953 struct nfs_getaclres res = {
3956 struct rpc_message msg = {
3957 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3961 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3962 int ret = -ENOMEM, i;
3964 /* As long as we're doing a round trip to the server anyway,
3965 * let's be prepared for a page of acl data. */
3968 if (npages > ARRAY_SIZE(pages))
3971 for (i = 0; i < npages; i++) {
3972 pages[i] = alloc_page(GFP_KERNEL);
3977 /* for decoding across pages */
3978 res.acl_scratch = alloc_page(GFP_KERNEL);
3979 if (!res.acl_scratch)
3982 args.acl_len = npages * PAGE_SIZE;
3983 args.acl_pgbase = 0;
3985 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3986 __func__, buf, buflen, npages, args.acl_len);
3987 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3988 &msg, &args.seq_args, &res.seq_res, 0);
3992 /* Handle the case where the passed-in buffer is too short */
3993 if (res.acl_flags & NFS4_ACL_TRUNC) {
3994 /* Did the user only issue a request for the acl length? */
4000 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4002 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4006 for (i = 0; i < npages; i++)
4008 __free_page(pages[i]);
4009 if (res.acl_scratch)
4010 __free_page(res.acl_scratch);
4014 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4016 struct nfs4_exception exception = { };
4019 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4022 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4023 } while (exception.retry);
4027 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4029 struct nfs_server *server = NFS_SERVER(inode);
4032 if (!nfs4_server_supports_acls(server))
4034 ret = nfs_revalidate_inode(server, inode);
4037 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4038 nfs_zap_acl_cache(inode);
4039 ret = nfs4_read_cached_acl(inode, buf, buflen);
4041 /* -ENOENT is returned if there is no ACL or if there is an ACL
4042 * but no cached acl data, just the acl length */
4044 return nfs4_get_acl_uncached(inode, buf, buflen);
4047 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4049 struct nfs_server *server = NFS_SERVER(inode);
4050 struct page *pages[NFS4ACL_MAXPAGES];
4051 struct nfs_setaclargs arg = {
4052 .fh = NFS_FH(inode),
4056 struct nfs_setaclres res;
4057 struct rpc_message msg = {
4058 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4062 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4065 if (!nfs4_server_supports_acls(server))
4067 if (npages > ARRAY_SIZE(pages))
4069 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4072 nfs4_inode_return_delegation(inode);
4073 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4076 * Free each page after tx, so the only ref left is
4077 * held by the network stack
4080 put_page(pages[i-1]);
4083 * Acl update can result in inode attribute update.
4084 * so mark the attribute cache invalid.
4086 spin_lock(&inode->i_lock);
4087 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4088 spin_unlock(&inode->i_lock);
4089 nfs_access_zap_cache(inode);
4090 nfs_zap_acl_cache(inode);
4094 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4096 struct nfs4_exception exception = { };
4099 err = nfs4_handle_exception(NFS_SERVER(inode),
4100 __nfs4_proc_set_acl(inode, buf, buflen),
4102 } while (exception.retry);
4107 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
4109 struct nfs_client *clp = server->nfs_client;
4111 if (task->tk_status >= 0)
4113 switch(task->tk_status) {
4114 case -NFS4ERR_DELEG_REVOKED:
4115 case -NFS4ERR_ADMIN_REVOKED:
4116 case -NFS4ERR_BAD_STATEID:
4119 nfs_remove_bad_delegation(state->inode);
4120 case -NFS4ERR_OPENMODE:
4123 nfs4_schedule_stateid_recovery(server, state);
4124 goto wait_on_recovery;
4125 case -NFS4ERR_EXPIRED:
4127 nfs4_schedule_stateid_recovery(server, state);
4128 case -NFS4ERR_STALE_STATEID:
4129 case -NFS4ERR_STALE_CLIENTID:
4130 nfs4_schedule_lease_recovery(clp);
4131 goto wait_on_recovery;
4132 #if defined(CONFIG_NFS_V4_1)
4133 case -NFS4ERR_BADSESSION:
4134 case -NFS4ERR_BADSLOT:
4135 case -NFS4ERR_BAD_HIGH_SLOT:
4136 case -NFS4ERR_DEADSESSION:
4137 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4138 case -NFS4ERR_SEQ_FALSE_RETRY:
4139 case -NFS4ERR_SEQ_MISORDERED:
4140 dprintk("%s ERROR %d, Reset session\n", __func__,
4142 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4143 task->tk_status = 0;
4145 #endif /* CONFIG_NFS_V4_1 */
4146 case -NFS4ERR_DELAY:
4147 nfs_inc_server_stats(server, NFSIOS_DELAY);
4148 case -NFS4ERR_GRACE:
4150 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4151 task->tk_status = 0;
4153 case -NFS4ERR_RETRY_UNCACHED_REP:
4154 case -NFS4ERR_OLD_STATEID:
4155 task->tk_status = 0;
4158 task->tk_status = nfs4_map_errors(task->tk_status);
4161 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4162 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4163 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4164 task->tk_status = 0;
4168 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4169 nfs4_verifier *bootverf)
4173 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4174 /* An impossible timestamp guarantees this value
4175 * will never match a generated boot time. */
4177 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4179 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4180 verf[0] = (__be32)nn->boot_time.tv_sec;
4181 verf[1] = (__be32)nn->boot_time.tv_nsec;
4183 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4187 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4188 char *buf, size_t len)
4190 unsigned int result;
4193 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4195 rpc_peeraddr2str(clp->cl_rpcclient,
4197 rpc_peeraddr2str(clp->cl_rpcclient,
4198 RPC_DISPLAY_PROTO));
4204 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4205 char *buf, size_t len)
4207 char *nodename = clp->cl_rpcclient->cl_nodename;
4209 if (nfs4_client_id_uniquifier[0] != '\0')
4210 nodename = nfs4_client_id_uniquifier;
4211 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4212 clp->rpc_ops->version, clp->cl_minorversion,
4217 * nfs4_proc_setclientid - Negotiate client ID
4218 * @clp: state data structure
4219 * @program: RPC program for NFSv4 callback service
4220 * @port: IP port number for NFS4 callback service
4221 * @cred: RPC credential to use for this call
4222 * @res: where to place the result
4224 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4226 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4227 unsigned short port, struct rpc_cred *cred,
4228 struct nfs4_setclientid_res *res)
4230 nfs4_verifier sc_verifier;
4231 struct nfs4_setclientid setclientid = {
4232 .sc_verifier = &sc_verifier,
4234 .sc_cb_ident = clp->cl_cb_ident,
4236 struct rpc_message msg = {
4237 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4238 .rpc_argp = &setclientid,
4244 /* nfs_client_id4 */
4245 nfs4_init_boot_verifier(clp, &sc_verifier);
4246 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4247 setclientid.sc_name_len =
4248 nfs4_init_uniform_client_string(clp,
4249 setclientid.sc_name,
4250 sizeof(setclientid.sc_name));
4252 setclientid.sc_name_len =
4253 nfs4_init_nonuniform_client_string(clp,
4254 setclientid.sc_name,
4255 sizeof(setclientid.sc_name));
4258 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4259 sizeof(setclientid.sc_netid),
4260 rpc_peeraddr2str(clp->cl_rpcclient,
4261 RPC_DISPLAY_NETID));
4263 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4264 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4265 clp->cl_ipaddr, port >> 8, port & 255);
4267 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4268 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4269 setclientid.sc_name_len, setclientid.sc_name);
4270 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4271 dprintk("NFS reply setclientid: %d\n", status);
4276 * nfs4_proc_setclientid_confirm - Confirm client ID
4277 * @clp: state data structure
4278 * @res: result of a previous SETCLIENTID
4279 * @cred: RPC credential to use for this call
4281 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4283 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4284 struct nfs4_setclientid_res *arg,
4285 struct rpc_cred *cred)
4287 struct nfs_fsinfo fsinfo;
4288 struct rpc_message msg = {
4289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4291 .rpc_resp = &fsinfo,
4297 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4298 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4301 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4303 spin_lock(&clp->cl_lock);
4304 clp->cl_lease_time = fsinfo.lease_time * HZ;
4305 clp->cl_last_renewal = now;
4306 spin_unlock(&clp->cl_lock);
4308 dprintk("NFS reply setclientid_confirm: %d\n", status);
4312 struct nfs4_delegreturndata {
4313 struct nfs4_delegreturnargs args;
4314 struct nfs4_delegreturnres res;
4316 nfs4_stateid stateid;
4317 unsigned long timestamp;
4318 struct nfs_fattr fattr;
4322 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4324 struct nfs4_delegreturndata *data = calldata;
4326 if (!nfs4_sequence_done(task, &data->res.seq_res))
4329 switch (task->tk_status) {
4330 case -NFS4ERR_STALE_STATEID:
4331 case -NFS4ERR_EXPIRED:
4333 renew_lease(data->res.server, data->timestamp);
4336 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4338 rpc_restart_call_prepare(task);
4342 data->rpc_status = task->tk_status;
4345 static void nfs4_delegreturn_release(void *calldata)
4350 #if defined(CONFIG_NFS_V4_1)
4351 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4353 struct nfs4_delegreturndata *d_data;
4355 d_data = (struct nfs4_delegreturndata *)data;
4357 if (nfs4_setup_sequence(d_data->res.server,
4358 &d_data->args.seq_args,
4359 &d_data->res.seq_res, task))
4361 rpc_call_start(task);
4363 #endif /* CONFIG_NFS_V4_1 */
4365 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4366 #if defined(CONFIG_NFS_V4_1)
4367 .rpc_call_prepare = nfs4_delegreturn_prepare,
4368 #endif /* CONFIG_NFS_V4_1 */
4369 .rpc_call_done = nfs4_delegreturn_done,
4370 .rpc_release = nfs4_delegreturn_release,
4373 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4375 struct nfs4_delegreturndata *data;
4376 struct nfs_server *server = NFS_SERVER(inode);
4377 struct rpc_task *task;
4378 struct rpc_message msg = {
4379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4382 struct rpc_task_setup task_setup_data = {
4383 .rpc_client = server->client,
4384 .rpc_message = &msg,
4385 .callback_ops = &nfs4_delegreturn_ops,
4386 .flags = RPC_TASK_ASYNC,
4390 data = kzalloc(sizeof(*data), GFP_NOFS);
4393 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4394 data->args.fhandle = &data->fh;
4395 data->args.stateid = &data->stateid;
4396 data->args.bitmask = server->cache_consistency_bitmask;
4397 nfs_copy_fh(&data->fh, NFS_FH(inode));
4398 nfs4_stateid_copy(&data->stateid, stateid);
4399 data->res.fattr = &data->fattr;
4400 data->res.server = server;
4401 nfs_fattr_init(data->res.fattr);
4402 data->timestamp = jiffies;
4403 data->rpc_status = 0;
4405 task_setup_data.callback_data = data;
4406 msg.rpc_argp = &data->args;
4407 msg.rpc_resp = &data->res;
4408 task = rpc_run_task(&task_setup_data);
4410 return PTR_ERR(task);
4413 status = nfs4_wait_for_completion_rpc_task(task);
4416 status = data->rpc_status;
4418 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4420 nfs_refresh_inode(inode, &data->fattr);
4426 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4428 struct nfs_server *server = NFS_SERVER(inode);
4429 struct nfs4_exception exception = { };
4432 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4434 case -NFS4ERR_STALE_STATEID:
4435 case -NFS4ERR_EXPIRED:
4439 err = nfs4_handle_exception(server, err, &exception);
4440 } while (exception.retry);
4444 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4445 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4448 * sleep, with exponential backoff, and retry the LOCK operation.
4450 static unsigned long
4451 nfs4_set_lock_task_retry(unsigned long timeout)
4453 freezable_schedule_timeout_killable(timeout);
4455 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4456 return NFS4_LOCK_MAXTIMEOUT;
4460 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4462 struct inode *inode = state->inode;
4463 struct nfs_server *server = NFS_SERVER(inode);
4464 struct nfs_client *clp = server->nfs_client;
4465 struct nfs_lockt_args arg = {
4466 .fh = NFS_FH(inode),
4469 struct nfs_lockt_res res = {
4472 struct rpc_message msg = {
4473 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4476 .rpc_cred = state->owner->so_cred,
4478 struct nfs4_lock_state *lsp;
4481 arg.lock_owner.clientid = clp->cl_clientid;
4482 status = nfs4_set_lock_state(state, request);
4485 lsp = request->fl_u.nfs4_fl.owner;
4486 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4487 arg.lock_owner.s_dev = server->s_dev;
4488 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4491 request->fl_type = F_UNLCK;
4493 case -NFS4ERR_DENIED:
4496 request->fl_ops->fl_release_private(request);
4501 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4503 struct nfs4_exception exception = { };
4507 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4508 _nfs4_proc_getlk(state, cmd, request),
4510 } while (exception.retry);
4514 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4517 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4519 res = posix_lock_file_wait(file, fl);
4522 res = flock_lock_file_wait(file, fl);
4530 struct nfs4_unlockdata {
4531 struct nfs_locku_args arg;
4532 struct nfs_locku_res res;
4533 struct nfs4_lock_state *lsp;
4534 struct nfs_open_context *ctx;
4535 struct file_lock fl;
4536 const struct nfs_server *server;
4537 unsigned long timestamp;
4540 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4541 struct nfs_open_context *ctx,
4542 struct nfs4_lock_state *lsp,
4543 struct nfs_seqid *seqid)
4545 struct nfs4_unlockdata *p;
4546 struct inode *inode = lsp->ls_state->inode;
4548 p = kzalloc(sizeof(*p), GFP_NOFS);
4551 p->arg.fh = NFS_FH(inode);
4553 p->arg.seqid = seqid;
4554 p->res.seqid = seqid;
4555 p->arg.stateid = &lsp->ls_stateid;
4557 atomic_inc(&lsp->ls_count);
4558 /* Ensure we don't close file until we're done freeing locks! */
4559 p->ctx = get_nfs_open_context(ctx);
4560 memcpy(&p->fl, fl, sizeof(p->fl));
4561 p->server = NFS_SERVER(inode);
4565 static void nfs4_locku_release_calldata(void *data)
4567 struct nfs4_unlockdata *calldata = data;
4568 nfs_free_seqid(calldata->arg.seqid);
4569 nfs4_put_lock_state(calldata->lsp);
4570 put_nfs_open_context(calldata->ctx);
4574 static void nfs4_locku_done(struct rpc_task *task, void *data)
4576 struct nfs4_unlockdata *calldata = data;
4578 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4580 switch (task->tk_status) {
4582 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4583 &calldata->res.stateid);
4584 renew_lease(calldata->server, calldata->timestamp);
4586 case -NFS4ERR_BAD_STATEID:
4587 case -NFS4ERR_OLD_STATEID:
4588 case -NFS4ERR_STALE_STATEID:
4589 case -NFS4ERR_EXPIRED:
4592 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4593 rpc_restart_call_prepare(task);
4595 nfs_release_seqid(calldata->arg.seqid);
4598 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4600 struct nfs4_unlockdata *calldata = data;
4602 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4604 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
4605 /* Note: exit _without_ running nfs4_locku_done */
4606 task->tk_action = NULL;
4609 calldata->timestamp = jiffies;
4610 if (nfs4_setup_sequence(calldata->server,
4611 &calldata->arg.seq_args,
4612 &calldata->res.seq_res,
4614 nfs_release_seqid(calldata->arg.seqid);
4616 rpc_call_start(task);
4619 static const struct rpc_call_ops nfs4_locku_ops = {
4620 .rpc_call_prepare = nfs4_locku_prepare,
4621 .rpc_call_done = nfs4_locku_done,
4622 .rpc_release = nfs4_locku_release_calldata,
4625 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4626 struct nfs_open_context *ctx,
4627 struct nfs4_lock_state *lsp,
4628 struct nfs_seqid *seqid)
4630 struct nfs4_unlockdata *data;
4631 struct rpc_message msg = {
4632 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4633 .rpc_cred = ctx->cred,
4635 struct rpc_task_setup task_setup_data = {
4636 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4637 .rpc_message = &msg,
4638 .callback_ops = &nfs4_locku_ops,
4639 .workqueue = nfsiod_workqueue,
4640 .flags = RPC_TASK_ASYNC,
4643 /* Ensure this is an unlock - when canceling a lock, the
4644 * canceled lock is passed in, and it won't be an unlock.
4646 fl->fl_type = F_UNLCK;
4648 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4650 nfs_free_seqid(seqid);
4651 return ERR_PTR(-ENOMEM);
4654 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4655 msg.rpc_argp = &data->arg;
4656 msg.rpc_resp = &data->res;
4657 task_setup_data.callback_data = data;
4658 return rpc_run_task(&task_setup_data);
4661 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4663 struct nfs_inode *nfsi = NFS_I(state->inode);
4664 struct nfs_seqid *seqid;
4665 struct nfs4_lock_state *lsp;
4666 struct rpc_task *task;
4668 unsigned char fl_flags = request->fl_flags;
4670 status = nfs4_set_lock_state(state, request);
4671 /* Unlock _before_ we do the RPC call */
4672 request->fl_flags |= FL_EXISTS;
4673 down_read(&nfsi->rwsem);
4674 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4675 up_read(&nfsi->rwsem);
4678 up_read(&nfsi->rwsem);
4681 /* Is this a delegated lock? */
4682 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4684 lsp = request->fl_u.nfs4_fl.owner;
4685 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4689 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4690 status = PTR_ERR(task);
4693 status = nfs4_wait_for_completion_rpc_task(task);
4696 request->fl_flags = fl_flags;
4700 struct nfs4_lockdata {
4701 struct nfs_lock_args arg;
4702 struct nfs_lock_res res;
4703 struct nfs4_lock_state *lsp;
4704 struct nfs_open_context *ctx;
4705 struct file_lock fl;
4706 unsigned long timestamp;
4709 struct nfs_server *server;
4712 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4713 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4716 struct nfs4_lockdata *p;
4717 struct inode *inode = lsp->ls_state->inode;
4718 struct nfs_server *server = NFS_SERVER(inode);
4720 p = kzalloc(sizeof(*p), gfp_mask);
4724 p->arg.fh = NFS_FH(inode);
4726 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4727 if (p->arg.open_seqid == NULL)
4729 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4730 if (p->arg.lock_seqid == NULL)
4731 goto out_free_seqid;
4732 p->arg.lock_stateid = &lsp->ls_stateid;
4733 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4734 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4735 p->arg.lock_owner.s_dev = server->s_dev;
4736 p->res.lock_seqid = p->arg.lock_seqid;
4739 atomic_inc(&lsp->ls_count);
4740 p->ctx = get_nfs_open_context(ctx);
4741 memcpy(&p->fl, fl, sizeof(p->fl));
4744 nfs_free_seqid(p->arg.open_seqid);
4750 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4752 struct nfs4_lockdata *data = calldata;
4753 struct nfs4_state *state = data->lsp->ls_state;
4755 dprintk("%s: begin!\n", __func__);
4756 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4758 /* Do we need to do an open_to_lock_owner? */
4759 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4760 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4761 goto out_release_lock_seqid;
4762 data->arg.open_stateid = &state->stateid;
4763 data->arg.new_lock_owner = 1;
4764 data->res.open_seqid = data->arg.open_seqid;
4766 data->arg.new_lock_owner = 0;
4767 data->timestamp = jiffies;
4768 if (nfs4_setup_sequence(data->server,
4769 &data->arg.seq_args,
4772 rpc_call_start(task);
4775 nfs_release_seqid(data->arg.open_seqid);
4776 out_release_lock_seqid:
4777 nfs_release_seqid(data->arg.lock_seqid);
4778 dprintk("%s: done!, ret = %d\n", __func__, task->tk_status);
4781 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4783 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4784 nfs4_lock_prepare(task, calldata);
4787 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4789 struct nfs4_lockdata *data = calldata;
4791 dprintk("%s: begin!\n", __func__);
4793 if (!nfs4_sequence_done(task, &data->res.seq_res))
4796 data->rpc_status = task->tk_status;
4797 if (data->arg.new_lock_owner != 0) {
4798 if (data->rpc_status == 0)
4799 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4803 if (data->rpc_status == 0) {
4804 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4805 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
4806 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4809 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4812 static void nfs4_lock_release(void *calldata)
4814 struct nfs4_lockdata *data = calldata;
4816 dprintk("%s: begin!\n", __func__);
4817 nfs_free_seqid(data->arg.open_seqid);
4818 if (data->cancelled != 0) {
4819 struct rpc_task *task;
4820 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4821 data->arg.lock_seqid);
4823 rpc_put_task_async(task);
4824 dprintk("%s: cancelling lock!\n", __func__);
4826 nfs_free_seqid(data->arg.lock_seqid);
4827 nfs4_put_lock_state(data->lsp);
4828 put_nfs_open_context(data->ctx);
4830 dprintk("%s: done!\n", __func__);
4833 static const struct rpc_call_ops nfs4_lock_ops = {
4834 .rpc_call_prepare = nfs4_lock_prepare,
4835 .rpc_call_done = nfs4_lock_done,
4836 .rpc_release = nfs4_lock_release,
4839 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4840 .rpc_call_prepare = nfs4_recover_lock_prepare,
4841 .rpc_call_done = nfs4_lock_done,
4842 .rpc_release = nfs4_lock_release,
4845 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4848 case -NFS4ERR_ADMIN_REVOKED:
4849 case -NFS4ERR_BAD_STATEID:
4850 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4851 if (new_lock_owner != 0 ||
4852 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
4853 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4855 case -NFS4ERR_STALE_STATEID:
4856 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4857 case -NFS4ERR_EXPIRED:
4858 nfs4_schedule_lease_recovery(server->nfs_client);
4862 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4864 struct nfs4_lockdata *data;
4865 struct rpc_task *task;
4866 struct rpc_message msg = {
4867 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4868 .rpc_cred = state->owner->so_cred,
4870 struct rpc_task_setup task_setup_data = {
4871 .rpc_client = NFS_CLIENT(state->inode),
4872 .rpc_message = &msg,
4873 .callback_ops = &nfs4_lock_ops,
4874 .workqueue = nfsiod_workqueue,
4875 .flags = RPC_TASK_ASYNC,
4879 dprintk("%s: begin!\n", __func__);
4880 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4881 fl->fl_u.nfs4_fl.owner,
4882 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4886 data->arg.block = 1;
4887 if (recovery_type > NFS_LOCK_NEW) {
4888 if (recovery_type == NFS_LOCK_RECLAIM)
4889 data->arg.reclaim = NFS_LOCK_RECLAIM;
4890 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4892 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4893 msg.rpc_argp = &data->arg;
4894 msg.rpc_resp = &data->res;
4895 task_setup_data.callback_data = data;
4896 task = rpc_run_task(&task_setup_data);
4898 return PTR_ERR(task);
4899 ret = nfs4_wait_for_completion_rpc_task(task);
4901 ret = data->rpc_status;
4903 nfs4_handle_setlk_error(data->server, data->lsp,
4904 data->arg.new_lock_owner, ret);
4906 data->cancelled = 1;
4908 dprintk("%s: done, ret = %d!\n", __func__, ret);
4912 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4914 struct nfs_server *server = NFS_SERVER(state->inode);
4915 struct nfs4_exception exception = {
4916 .inode = state->inode,
4921 /* Cache the lock if possible... */
4922 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4924 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4925 if (err != -NFS4ERR_DELAY)
4927 nfs4_handle_exception(server, err, &exception);
4928 } while (exception.retry);
4932 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4934 struct nfs_server *server = NFS_SERVER(state->inode);
4935 struct nfs4_exception exception = {
4936 .inode = state->inode,
4940 err = nfs4_set_lock_state(state, request);
4944 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4946 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4950 case -NFS4ERR_GRACE:
4951 case -NFS4ERR_DELAY:
4952 nfs4_handle_exception(server, err, &exception);
4955 } while (exception.retry);
4960 #if defined(CONFIG_NFS_V4_1)
4962 * nfs41_check_expired_locks - possibly free a lock stateid
4964 * @state: NFSv4 state for an inode
4966 * Returns NFS_OK if recovery for this stateid is now finished.
4967 * Otherwise a negative NFS4ERR value is returned.
4969 static int nfs41_check_expired_locks(struct nfs4_state *state)
4971 int status, ret = -NFS4ERR_BAD_STATEID;
4972 struct nfs4_lock_state *lsp;
4973 struct nfs_server *server = NFS_SERVER(state->inode);
4975 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4976 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
4977 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4978 if (status != NFS_OK) {
4979 /* Free the stateid unless the server
4980 * informs us the stateid is unrecognized. */
4981 if (status != -NFS4ERR_BAD_STATEID)
4982 nfs41_free_stateid(server,
4984 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
4993 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4995 int status = NFS_OK;
4997 if (test_bit(LK_STATE_IN_USE, &state->flags))
4998 status = nfs41_check_expired_locks(state);
4999 if (status != NFS_OK)
5000 status = nfs4_lock_expired(state, request);
5005 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5007 struct nfs_inode *nfsi = NFS_I(state->inode);
5008 unsigned char fl_flags = request->fl_flags;
5009 int status = -ENOLCK;
5011 if ((fl_flags & FL_POSIX) &&
5012 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5014 /* Is this a delegated open? */
5015 status = nfs4_set_lock_state(state, request);
5018 request->fl_flags |= FL_ACCESS;
5019 status = do_vfs_lock(request->fl_file, request);
5022 down_read(&nfsi->rwsem);
5023 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
5024 /* Yes: cache locks! */
5025 /* ...but avoid races with delegation recall... */
5026 request->fl_flags = fl_flags & ~FL_SLEEP;
5027 status = do_vfs_lock(request->fl_file, request);
5030 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
5033 /* Note: we always want to sleep here! */
5034 request->fl_flags = fl_flags | FL_SLEEP;
5035 if (do_vfs_lock(request->fl_file, request) < 0)
5036 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5037 "manager!\n", __func__);
5039 up_read(&nfsi->rwsem);
5041 request->fl_flags = fl_flags;
5045 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5047 struct nfs4_exception exception = {
5049 .inode = state->inode,
5054 err = _nfs4_proc_setlk(state, cmd, request);
5055 if (err == -NFS4ERR_DENIED)
5057 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5059 } while (exception.retry);
5064 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5066 struct nfs_open_context *ctx;
5067 struct nfs4_state *state;
5068 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5071 /* verify open state */
5072 ctx = nfs_file_open_context(filp);
5075 if (request->fl_start < 0 || request->fl_end < 0)
5078 if (IS_GETLK(cmd)) {
5080 return nfs4_proc_getlk(state, F_GETLK, request);
5084 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5087 if (request->fl_type == F_UNLCK) {
5089 return nfs4_proc_unlck(state, cmd, request);
5096 * Don't rely on the VFS having checked the file open mode,
5097 * since it won't do this for flock() locks.
5099 switch (request->fl_type) {
5101 if (!(filp->f_mode & FMODE_READ))
5105 if (!(filp->f_mode & FMODE_WRITE))
5110 status = nfs4_proc_setlk(state, cmd, request);
5111 if ((status != -EAGAIN) || IS_SETLK(cmd))
5113 timeout = nfs4_set_lock_task_retry(timeout);
5114 status = -ERESTARTSYS;
5117 } while(status < 0);
5121 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
5123 struct nfs_server *server = NFS_SERVER(state->inode);
5124 struct nfs4_exception exception = { };
5127 err = nfs4_set_lock_state(state, fl);
5131 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5134 printk(KERN_ERR "NFS: %s: unhandled error "
5135 "%d.\n", __func__, err);
5139 case -NFS4ERR_EXPIRED:
5140 nfs4_schedule_stateid_recovery(server, state);
5141 case -NFS4ERR_STALE_CLIENTID:
5142 case -NFS4ERR_STALE_STATEID:
5143 nfs4_schedule_lease_recovery(server->nfs_client);
5145 case -NFS4ERR_BADSESSION:
5146 case -NFS4ERR_BADSLOT:
5147 case -NFS4ERR_BAD_HIGH_SLOT:
5148 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5149 case -NFS4ERR_DEADSESSION:
5150 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
5154 * The show must go on: exit, but mark the
5155 * stateid as needing recovery.
5157 case -NFS4ERR_DELEG_REVOKED:
5158 case -NFS4ERR_ADMIN_REVOKED:
5159 case -NFS4ERR_BAD_STATEID:
5160 case -NFS4ERR_OPENMODE:
5161 nfs4_schedule_stateid_recovery(server, state);
5166 * User RPCSEC_GSS context has expired.
5167 * We cannot recover this stateid now, so
5168 * skip it and allow recovery thread to
5174 case -NFS4ERR_DENIED:
5175 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5178 case -NFS4ERR_DELAY:
5181 err = nfs4_handle_exception(server, err, &exception);
5182 } while (exception.retry);
5187 struct nfs_release_lockowner_data {
5188 struct nfs4_lock_state *lsp;
5189 struct nfs_server *server;
5190 struct nfs_release_lockowner_args args;
5193 static void nfs4_release_lockowner_release(void *calldata)
5195 struct nfs_release_lockowner_data *data = calldata;
5196 nfs4_free_lock_state(data->server, data->lsp);
5200 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5201 .rpc_release = nfs4_release_lockowner_release,
5204 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
5206 struct nfs_server *server = lsp->ls_state->owner->so_server;
5207 struct nfs_release_lockowner_data *data;
5208 struct rpc_message msg = {
5209 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5212 if (server->nfs_client->cl_mvops->minor_version != 0)
5214 data = kmalloc(sizeof(*data), GFP_NOFS);
5218 data->server = server;
5219 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5220 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5221 data->args.lock_owner.s_dev = server->s_dev;
5222 msg.rpc_argp = &data->args;
5223 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5227 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5229 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5230 const void *buf, size_t buflen,
5231 int flags, int type)
5233 if (strcmp(key, "") != 0)
5236 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5239 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5240 void *buf, size_t buflen, int type)
5242 if (strcmp(key, "") != 0)
5245 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5248 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5249 size_t list_len, const char *name,
5250 size_t name_len, int type)
5252 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5254 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5257 if (list && len <= list_len)
5258 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5263 * nfs_fhget will use either the mounted_on_fileid or the fileid
5265 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5267 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5268 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5269 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5270 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5273 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5274 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5275 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5279 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5280 const struct qstr *name,
5281 struct nfs4_fs_locations *fs_locations,
5284 struct nfs_server *server = NFS_SERVER(dir);
5286 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5288 struct nfs4_fs_locations_arg args = {
5289 .dir_fh = NFS_FH(dir),
5294 struct nfs4_fs_locations_res res = {
5295 .fs_locations = fs_locations,
5297 struct rpc_message msg = {
5298 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5304 dprintk("%s: start\n", __func__);
5306 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5307 * is not supported */
5308 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5309 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5311 bitmask[0] |= FATTR4_WORD0_FILEID;
5313 nfs_fattr_init(&fs_locations->fattr);
5314 fs_locations->server = server;
5315 fs_locations->nlocations = 0;
5316 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5317 dprintk("%s: returned status = %d\n", __func__, status);
5321 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5322 const struct qstr *name,
5323 struct nfs4_fs_locations *fs_locations,
5326 struct nfs4_exception exception = { };
5329 err = nfs4_handle_exception(NFS_SERVER(dir),
5330 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5332 } while (exception.retry);
5336 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5339 struct nfs4_secinfo_arg args = {
5340 .dir_fh = NFS_FH(dir),
5343 struct nfs4_secinfo_res res = {
5346 struct rpc_message msg = {
5347 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5352 dprintk("NFS call secinfo %s\n", name->name);
5353 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5354 dprintk("NFS reply secinfo: %d\n", status);
5358 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5359 struct nfs4_secinfo_flavors *flavors)
5361 struct nfs4_exception exception = { };
5364 err = nfs4_handle_exception(NFS_SERVER(dir),
5365 _nfs4_proc_secinfo(dir, name, flavors),
5367 } while (exception.retry);
5371 #ifdef CONFIG_NFS_V4_1
5373 * Check the exchange flags returned by the server for invalid flags, having
5374 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5377 static int nfs4_check_cl_exchange_flags(u32 flags)
5379 if (flags & ~EXCHGID4_FLAG_MASK_R)
5381 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5382 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5384 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5388 return -NFS4ERR_INVAL;
5392 nfs41_same_server_scope(struct nfs41_server_scope *a,
5393 struct nfs41_server_scope *b)
5395 if (a->server_scope_sz == b->server_scope_sz &&
5396 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5403 * nfs4_proc_bind_conn_to_session()
5405 * The 4.1 client currently uses the same TCP connection for the
5406 * fore and backchannel.
5408 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5411 struct nfs41_bind_conn_to_session_res res;
5412 struct rpc_message msg = {
5414 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5420 dprintk("--> %s\n", __func__);
5422 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5423 if (unlikely(res.session == NULL)) {
5428 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5430 if (memcmp(res.session->sess_id.data,
5431 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5432 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5436 if (res.dir != NFS4_CDFS4_BOTH) {
5437 dprintk("NFS: %s: Unexpected direction from server\n",
5442 if (res.use_conn_in_rdma_mode) {
5443 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5452 dprintk("<-- %s status= %d\n", __func__, status);
5457 * nfs4_proc_exchange_id()
5459 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5461 * Since the clientid has expired, all compounds using sessions
5462 * associated with the stale clientid will be returning
5463 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5464 * be in some phase of session reset.
5466 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5468 nfs4_verifier verifier;
5469 struct nfs41_exchange_id_args args = {
5470 .verifier = &verifier,
5472 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5474 struct nfs41_exchange_id_res res = {
5478 struct rpc_message msg = {
5479 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5485 nfs4_init_boot_verifier(clp, &verifier);
5486 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5488 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5489 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5490 args.id_len, args.id);
5492 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5494 if (unlikely(res.server_owner == NULL)) {
5499 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5501 if (unlikely(res.server_scope == NULL)) {
5503 goto out_server_owner;
5506 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5507 if (unlikely(res.impl_id == NULL)) {
5509 goto out_server_scope;
5512 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5514 status = nfs4_check_cl_exchange_flags(res.flags);
5517 clp->cl_clientid = res.clientid;
5518 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5519 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5520 clp->cl_seqid = res.seqid;
5522 kfree(clp->cl_serverowner);
5523 clp->cl_serverowner = res.server_owner;
5524 res.server_owner = NULL;
5526 /* use the most recent implementation id */
5527 kfree(clp->cl_implid);
5528 clp->cl_implid = res.impl_id;
5530 if (clp->cl_serverscope != NULL &&
5531 !nfs41_same_server_scope(clp->cl_serverscope,
5532 res.server_scope)) {
5533 dprintk("%s: server_scope mismatch detected\n",
5535 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5536 kfree(clp->cl_serverscope);
5537 clp->cl_serverscope = NULL;
5540 if (clp->cl_serverscope == NULL) {
5541 clp->cl_serverscope = res.server_scope;
5548 kfree(res.server_owner);
5550 kfree(res.server_scope);
5552 if (clp->cl_implid != NULL)
5553 dprintk("NFS reply exchange_id: Server Implementation ID: "
5554 "domain: %s, name: %s, date: %llu,%u\n",
5555 clp->cl_implid->domain, clp->cl_implid->name,
5556 clp->cl_implid->date.seconds,
5557 clp->cl_implid->date.nseconds);
5558 dprintk("NFS reply exchange_id: %d\n", status);
5562 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5563 struct rpc_cred *cred)
5565 struct rpc_message msg = {
5566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5572 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5574 dprintk("NFS: Got error %d from the server %s on "
5575 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5579 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5580 struct rpc_cred *cred)
5585 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5586 ret = _nfs4_proc_destroy_clientid(clp, cred);
5588 case -NFS4ERR_DELAY:
5589 case -NFS4ERR_CLIENTID_BUSY:
5599 int nfs4_destroy_clientid(struct nfs_client *clp)
5601 struct rpc_cred *cred;
5604 if (clp->cl_mvops->minor_version < 1)
5606 if (clp->cl_exchange_flags == 0)
5608 if (clp->cl_preserve_clid)
5610 cred = nfs4_get_exchange_id_cred(clp);
5611 ret = nfs4_proc_destroy_clientid(clp, cred);
5616 case -NFS4ERR_STALE_CLIENTID:
5617 clp->cl_exchange_flags = 0;
5623 struct nfs4_get_lease_time_data {
5624 struct nfs4_get_lease_time_args *args;
5625 struct nfs4_get_lease_time_res *res;
5626 struct nfs_client *clp;
5629 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5633 struct nfs4_get_lease_time_data *data =
5634 (struct nfs4_get_lease_time_data *)calldata;
5636 dprintk("--> %s\n", __func__);
5637 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5638 /* just setup sequence, do not trigger session recovery
5639 since we're invoked within one */
5640 ret = nfs41_setup_sequence(data->clp->cl_session,
5641 &data->args->la_seq_args,
5642 &data->res->lr_seq_res, task);
5645 rpc_call_start(task);
5646 dprintk("<-- %s\n", __func__);
5650 * Called from nfs4_state_manager thread for session setup, so don't recover
5651 * from sequence operation or clientid errors.
5653 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5655 struct nfs4_get_lease_time_data *data =
5656 (struct nfs4_get_lease_time_data *)calldata;
5658 dprintk("--> %s\n", __func__);
5659 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5661 switch (task->tk_status) {
5662 case -NFS4ERR_DELAY:
5663 case -NFS4ERR_GRACE:
5664 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5665 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5666 task->tk_status = 0;
5668 case -NFS4ERR_RETRY_UNCACHED_REP:
5669 rpc_restart_call_prepare(task);
5672 dprintk("<-- %s\n", __func__);
5675 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5676 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5677 .rpc_call_done = nfs4_get_lease_time_done,
5680 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5682 struct rpc_task *task;
5683 struct nfs4_get_lease_time_args args;
5684 struct nfs4_get_lease_time_res res = {
5685 .lr_fsinfo = fsinfo,
5687 struct nfs4_get_lease_time_data data = {
5692 struct rpc_message msg = {
5693 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5697 struct rpc_task_setup task_setup = {
5698 .rpc_client = clp->cl_rpcclient,
5699 .rpc_message = &msg,
5700 .callback_ops = &nfs4_get_lease_time_ops,
5701 .callback_data = &data,
5702 .flags = RPC_TASK_TIMEOUT,
5706 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5707 dprintk("--> %s\n", __func__);
5708 task = rpc_run_task(&task_setup);
5711 status = PTR_ERR(task);
5713 status = task->tk_status;
5716 dprintk("<-- %s return %d\n", __func__, status);
5721 struct nfs4_slot *nfs4_alloc_slots(struct nfs4_slot_table *table,
5722 u32 max_slots, gfp_t gfp_flags)
5724 struct nfs4_slot *tbl;
5727 tbl = kmalloc_array(max_slots, sizeof(*tbl), gfp_flags);
5729 for (i = 0; i < max_slots; i++) {
5730 tbl[i].table = table;
5737 static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5738 struct nfs4_slot *new,
5742 struct nfs4_slot *old = NULL;
5745 spin_lock(&tbl->slot_tbl_lock);
5749 tbl->max_slots = max_slots;
5751 tbl->highest_used_slotid = NFS4_NO_SLOT;
5752 tbl->target_highest_slotid = max_slots - 1;
5753 tbl->server_highest_slotid = max_slots - 1;
5754 tbl->max_slotid = max_slots - 1;
5755 for (i = 0; i < tbl->max_slots; i++)
5756 tbl->slots[i].seq_nr = ivalue;
5757 spin_unlock(&tbl->slot_tbl_lock);
5762 * (re)Initialise a slot table
5764 static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5767 struct nfs4_slot *new = NULL;
5770 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5771 max_reqs, tbl->max_slots);
5773 /* Does the newly negotiated max_reqs match the existing slot table? */
5774 if (max_reqs != tbl->max_slots) {
5775 new = nfs4_alloc_slots(tbl, max_reqs, GFP_NOFS);
5781 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
5782 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5783 tbl, tbl->slots, tbl->max_slots);
5785 dprintk("<-- %s: return %d\n", __func__, ret);
5789 /* Destroy the slot table */
5790 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5792 if (session->fc_slot_table.slots != NULL) {
5793 kfree(session->fc_slot_table.slots);
5794 session->fc_slot_table.slots = NULL;
5796 if (session->bc_slot_table.slots != NULL) {
5797 kfree(session->bc_slot_table.slots);
5798 session->bc_slot_table.slots = NULL;
5804 * Initialize or reset the forechannel and backchannel tables
5806 static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5808 struct nfs4_slot_table *tbl;
5811 dprintk("--> %s\n", __func__);
5813 tbl = &ses->fc_slot_table;
5815 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5816 if (status) /* -ENOMEM */
5819 tbl = &ses->bc_slot_table;
5821 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5822 if (status && tbl->slots == NULL)
5823 /* Fore and back channel share a connection so get
5824 * both slot tables or neither */
5825 nfs4_destroy_slot_tables(ses);
5829 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5831 struct nfs4_session *session;
5832 struct nfs4_slot_table *tbl;
5834 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5838 tbl = &session->fc_slot_table;
5839 tbl->highest_used_slotid = NFS4_NO_SLOT;
5840 spin_lock_init(&tbl->slot_tbl_lock);
5841 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5842 init_completion(&tbl->complete);
5844 tbl = &session->bc_slot_table;
5845 tbl->highest_used_slotid = NFS4_NO_SLOT;
5846 spin_lock_init(&tbl->slot_tbl_lock);
5847 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5848 init_completion(&tbl->complete);
5850 session->session_state = 1<<NFS4_SESSION_INITING;
5856 void nfs4_destroy_session(struct nfs4_session *session)
5858 struct rpc_xprt *xprt;
5859 struct rpc_cred *cred;
5861 cred = nfs4_get_exchange_id_cred(session->clp);
5862 nfs4_proc_destroy_session(session, cred);
5867 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5869 dprintk("%s Destroy backchannel for xprt %p\n",
5871 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5872 nfs4_destroy_slot_tables(session);
5877 * Initialize the values to be used by the client in CREATE_SESSION
5878 * If nfs4_init_session set the fore channel request and response sizes,
5881 * Set the back channel max_resp_sz_cached to zero to force the client to
5882 * always set csa_cachethis to FALSE because the current implementation
5883 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5885 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5887 struct nfs4_session *session = args->client->cl_session;
5888 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5889 mxresp_sz = session->fc_target_max_resp_sz;
5892 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5894 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5895 /* Fore channel attributes */
5896 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5897 args->fc_attrs.max_resp_sz = mxresp_sz;
5898 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5899 args->fc_attrs.max_reqs = max_session_slots;
5901 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5902 "max_ops=%u max_reqs=%u\n",
5904 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5905 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5907 /* Back channel attributes */
5908 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5909 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5910 args->bc_attrs.max_resp_sz_cached = 0;
5911 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5912 args->bc_attrs.max_reqs = 1;
5914 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5915 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5917 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5918 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5919 args->bc_attrs.max_reqs);
5922 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5924 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5925 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5927 if (rcvd->max_resp_sz > sent->max_resp_sz)
5930 * Our requested max_ops is the minimum we need; we're not
5931 * prepared to break up compounds into smaller pieces than that.
5932 * So, no point even trying to continue if the server won't
5935 if (rcvd->max_ops < sent->max_ops)
5937 if (rcvd->max_reqs == 0)
5939 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5940 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5944 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5946 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5947 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5949 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5951 if (rcvd->max_resp_sz < sent->max_resp_sz)
5953 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5955 /* These would render the backchannel useless: */
5956 if (rcvd->max_ops != sent->max_ops)
5958 if (rcvd->max_reqs != sent->max_reqs)
5963 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5964 struct nfs4_session *session)
5968 ret = nfs4_verify_fore_channel_attrs(args, session);
5971 return nfs4_verify_back_channel_attrs(args, session);
5974 static int _nfs4_proc_create_session(struct nfs_client *clp,
5975 struct rpc_cred *cred)
5977 struct nfs4_session *session = clp->cl_session;
5978 struct nfs41_create_session_args args = {
5980 .cb_program = NFS4_CALLBACK,
5982 struct nfs41_create_session_res res = {
5985 struct rpc_message msg = {
5986 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5993 nfs4_init_channel_attrs(&args);
5994 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5996 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5999 /* Verify the session's negotiated channel_attrs values */
6000 status = nfs4_verify_channel_attrs(&args, session);
6001 /* Increment the clientid slot sequence id */
6009 * Issues a CREATE_SESSION operation to the server.
6010 * It is the responsibility of the caller to verify the session is
6011 * expired before calling this routine.
6013 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
6017 struct nfs4_session *session = clp->cl_session;
6019 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6021 status = _nfs4_proc_create_session(clp, cred);
6025 /* Init or reset the session slot tables */
6026 status = nfs4_setup_session_slot_tables(session);
6027 dprintk("slot table setup returned %d\n", status);
6031 ptr = (unsigned *)&session->sess_id.data[0];
6032 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6033 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
6035 dprintk("<-- %s\n", __func__);
6040 * Issue the over-the-wire RPC DESTROY_SESSION.
6041 * The caller must serialize access to this routine.
6043 int nfs4_proc_destroy_session(struct nfs4_session *session,
6044 struct rpc_cred *cred)
6046 struct rpc_message msg = {
6047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6048 .rpc_argp = session,
6053 dprintk("--> nfs4_proc_destroy_session\n");
6055 /* session is still being setup */
6056 if (session->clp->cl_cons_state != NFS_CS_READY)
6059 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6062 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
6063 "Session has been destroyed regardless...\n", status);
6065 dprintk("<-- nfs4_proc_destroy_session\n");
6070 * With sessions, the client is not marked ready until after a
6071 * successful EXCHANGE_ID and CREATE_SESSION.
6073 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
6074 * other versions of NFS can be tried.
6076 static int nfs41_check_session_ready(struct nfs_client *clp)
6080 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
6081 ret = nfs4_client_recover_expired_lease(clp);
6085 if (clp->cl_cons_state < NFS_CS_READY)
6086 return -EPROTONOSUPPORT;
6091 int nfs4_init_session(struct nfs_server *server)
6093 struct nfs_client *clp = server->nfs_client;
6094 struct nfs4_session *session;
6095 unsigned int target_max_rqst_sz = NFS_MAX_FILE_IO_SIZE;
6096 unsigned int target_max_resp_sz = NFS_MAX_FILE_IO_SIZE;
6098 if (!nfs4_has_session(clp))
6101 if (server->rsize != 0)
6102 target_max_resp_sz = server->rsize;
6103 target_max_resp_sz += nfs41_maxread_overhead;
6105 if (server->wsize != 0)
6106 target_max_rqst_sz = server->wsize;
6107 target_max_rqst_sz += nfs41_maxwrite_overhead;
6109 session = clp->cl_session;
6110 spin_lock(&clp->cl_lock);
6111 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
6112 /* Initialise targets and channel attributes */
6113 session->fc_target_max_rqst_sz = target_max_rqst_sz;
6114 session->fc_attrs.max_rqst_sz = target_max_rqst_sz;
6115 session->fc_target_max_resp_sz = target_max_resp_sz;
6116 session->fc_attrs.max_resp_sz = target_max_resp_sz;
6118 /* Just adjust the targets */
6119 if (target_max_rqst_sz > session->fc_target_max_rqst_sz) {
6120 session->fc_target_max_rqst_sz = target_max_rqst_sz;
6121 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
6123 if (target_max_resp_sz > session->fc_target_max_resp_sz) {
6124 session->fc_target_max_resp_sz = target_max_resp_sz;
6125 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
6128 spin_unlock(&clp->cl_lock);
6130 if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
6131 nfs4_schedule_lease_recovery(clp);
6133 return nfs41_check_session_ready(clp);
6136 int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
6138 struct nfs4_session *session = clp->cl_session;
6141 spin_lock(&clp->cl_lock);
6142 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
6144 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
6145 * DS lease to be equal to the MDS lease.
6147 clp->cl_lease_time = lease_time;
6148 clp->cl_last_renewal = jiffies;
6150 spin_unlock(&clp->cl_lock);
6152 ret = nfs41_check_session_ready(clp);
6155 /* Test for the DS role */
6156 if (!is_ds_client(clp))
6160 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
6164 * Renew the cl_session lease.
6166 struct nfs4_sequence_data {
6167 struct nfs_client *clp;
6168 struct nfs4_sequence_args args;
6169 struct nfs4_sequence_res res;
6172 static void nfs41_sequence_release(void *data)
6174 struct nfs4_sequence_data *calldata = data;
6175 struct nfs_client *clp = calldata->clp;
6177 if (atomic_read(&clp->cl_count) > 1)
6178 nfs4_schedule_state_renewal(clp);
6179 nfs_put_client(clp);
6183 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6185 switch(task->tk_status) {
6186 case -NFS4ERR_DELAY:
6187 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6190 nfs4_schedule_lease_recovery(clp);
6195 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
6197 struct nfs4_sequence_data *calldata = data;
6198 struct nfs_client *clp = calldata->clp;
6200 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6203 if (task->tk_status < 0) {
6204 dprintk("%s ERROR %d\n", __func__, task->tk_status);
6205 if (atomic_read(&clp->cl_count) == 1)
6208 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6209 rpc_restart_call_prepare(task);
6213 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
6215 dprintk("<-- %s\n", __func__);
6218 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6220 struct nfs4_sequence_data *calldata = data;
6221 struct nfs_client *clp = calldata->clp;
6222 struct nfs4_sequence_args *args;
6223 struct nfs4_sequence_res *res;
6225 args = task->tk_msg.rpc_argp;
6226 res = task->tk_msg.rpc_resp;
6228 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
6230 rpc_call_start(task);
6233 static void nfs41_sequence_prepare_privileged(struct rpc_task *task, void *data)
6235 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
6236 nfs41_sequence_prepare(task, data);
6239 static const struct rpc_call_ops nfs41_sequence_ops = {
6240 .rpc_call_done = nfs41_sequence_call_done,
6241 .rpc_call_prepare = nfs41_sequence_prepare,
6242 .rpc_release = nfs41_sequence_release,
6245 static const struct rpc_call_ops nfs41_sequence_privileged_ops = {
6246 .rpc_call_done = nfs41_sequence_call_done,
6247 .rpc_call_prepare = nfs41_sequence_prepare_privileged,
6248 .rpc_release = nfs41_sequence_release,
6251 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred,
6252 const struct rpc_call_ops *seq_ops)
6254 struct nfs4_sequence_data *calldata;
6255 struct rpc_message msg = {
6256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6259 struct rpc_task_setup task_setup_data = {
6260 .rpc_client = clp->cl_rpcclient,
6261 .rpc_message = &msg,
6262 .callback_ops = seq_ops,
6263 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6266 if (!atomic_inc_not_zero(&clp->cl_count))
6267 return ERR_PTR(-EIO);
6268 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6269 if (calldata == NULL) {
6270 nfs_put_client(clp);
6271 return ERR_PTR(-ENOMEM);
6273 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
6274 msg.rpc_argp = &calldata->args;
6275 msg.rpc_resp = &calldata->res;
6276 calldata->clp = clp;
6277 task_setup_data.callback_data = calldata;
6279 return rpc_run_task(&task_setup_data);
6282 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
6284 struct rpc_task *task;
6287 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6289 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_ops);
6291 ret = PTR_ERR(task);
6293 rpc_put_task_async(task);
6294 dprintk("<-- %s status=%d\n", __func__, ret);
6298 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6300 struct rpc_task *task;
6303 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_privileged_ops);
6305 ret = PTR_ERR(task);
6308 ret = rpc_wait_for_completion_task(task);
6310 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6312 if (task->tk_status == 0)
6313 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
6314 ret = task->tk_status;
6318 dprintk("<-- %s status=%d\n", __func__, ret);
6322 struct nfs4_reclaim_complete_data {
6323 struct nfs_client *clp;
6324 struct nfs41_reclaim_complete_args arg;
6325 struct nfs41_reclaim_complete_res res;
6328 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6330 struct nfs4_reclaim_complete_data *calldata = data;
6332 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
6333 if (nfs41_setup_sequence(calldata->clp->cl_session,
6334 &calldata->arg.seq_args,
6335 &calldata->res.seq_res, task))
6338 rpc_call_start(task);
6341 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6343 switch(task->tk_status) {
6345 case -NFS4ERR_COMPLETE_ALREADY:
6346 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6348 case -NFS4ERR_DELAY:
6349 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6351 case -NFS4ERR_RETRY_UNCACHED_REP:
6354 nfs4_schedule_lease_recovery(clp);
6359 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6361 struct nfs4_reclaim_complete_data *calldata = data;
6362 struct nfs_client *clp = calldata->clp;
6363 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6365 dprintk("--> %s\n", __func__);
6366 if (!nfs41_sequence_done(task, res))
6369 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6370 rpc_restart_call_prepare(task);
6373 dprintk("<-- %s\n", __func__);
6376 static void nfs4_free_reclaim_complete_data(void *data)
6378 struct nfs4_reclaim_complete_data *calldata = data;
6383 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6384 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6385 .rpc_call_done = nfs4_reclaim_complete_done,
6386 .rpc_release = nfs4_free_reclaim_complete_data,
6390 * Issue a global reclaim complete.
6392 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6394 struct nfs4_reclaim_complete_data *calldata;
6395 struct rpc_task *task;
6396 struct rpc_message msg = {
6397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6399 struct rpc_task_setup task_setup_data = {
6400 .rpc_client = clp->cl_rpcclient,
6401 .rpc_message = &msg,
6402 .callback_ops = &nfs4_reclaim_complete_call_ops,
6403 .flags = RPC_TASK_ASYNC,
6405 int status = -ENOMEM;
6407 dprintk("--> %s\n", __func__);
6408 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6409 if (calldata == NULL)
6411 calldata->clp = clp;
6412 calldata->arg.one_fs = 0;
6414 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6415 msg.rpc_argp = &calldata->arg;
6416 msg.rpc_resp = &calldata->res;
6417 task_setup_data.callback_data = calldata;
6418 task = rpc_run_task(&task_setup_data);
6420 status = PTR_ERR(task);
6423 status = nfs4_wait_for_completion_rpc_task(task);
6425 status = task->tk_status;
6429 dprintk("<-- %s status=%d\n", __func__, status);
6434 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6436 struct nfs4_layoutget *lgp = calldata;
6437 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6439 dprintk("--> %s\n", __func__);
6440 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6441 * right now covering the LAYOUTGET we are about to send.
6442 * However, that is not so catastrophic, and there seems
6443 * to be no way to prevent it completely.
6445 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
6446 &lgp->res.seq_res, task))
6448 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6449 NFS_I(lgp->args.inode)->layout,
6450 lgp->args.ctx->state)) {
6451 rpc_exit(task, NFS4_OK);
6454 rpc_call_start(task);
6457 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6459 struct nfs4_layoutget *lgp = calldata;
6460 struct inode *inode = lgp->args.inode;
6461 struct nfs_server *server = NFS_SERVER(inode);
6462 struct pnfs_layout_hdr *lo;
6463 struct nfs4_state *state = NULL;
6465 dprintk("--> %s\n", __func__);
6467 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6470 switch (task->tk_status) {
6473 case -NFS4ERR_LAYOUTTRYLATER:
6474 case -NFS4ERR_RECALLCONFLICT:
6475 task->tk_status = -NFS4ERR_DELAY;
6477 case -NFS4ERR_EXPIRED:
6478 case -NFS4ERR_BAD_STATEID:
6479 spin_lock(&inode->i_lock);
6480 lo = NFS_I(inode)->layout;
6481 if (!lo || list_empty(&lo->plh_segs)) {
6482 spin_unlock(&inode->i_lock);
6483 /* If the open stateid was bad, then recover it. */
6484 state = lgp->args.ctx->state;
6488 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6489 spin_unlock(&inode->i_lock);
6490 /* Mark the bad layout state as invalid, then
6491 * retry using the open stateid. */
6492 pnfs_free_lseg_list(&head);
6495 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6496 rpc_restart_call_prepare(task);
6498 dprintk("<-- %s\n", __func__);
6501 static size_t max_response_pages(struct nfs_server *server)
6503 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6504 return nfs_page_array_len(0, max_resp_sz);
6507 static void nfs4_free_pages(struct page **pages, size_t size)
6514 for (i = 0; i < size; i++) {
6517 __free_page(pages[i]);
6522 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6524 struct page **pages;
6527 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6529 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6533 for (i = 0; i < size; i++) {
6534 pages[i] = alloc_page(gfp_flags);
6536 dprintk("%s: failed to allocate page\n", __func__);
6537 nfs4_free_pages(pages, size);
6545 static void nfs4_layoutget_release(void *calldata)
6547 struct nfs4_layoutget *lgp = calldata;
6548 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6549 size_t max_pages = max_response_pages(server);
6551 dprintk("--> %s\n", __func__);
6552 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6553 put_nfs_open_context(lgp->args.ctx);
6555 dprintk("<-- %s\n", __func__);
6558 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6559 .rpc_call_prepare = nfs4_layoutget_prepare,
6560 .rpc_call_done = nfs4_layoutget_done,
6561 .rpc_release = nfs4_layoutget_release,
6564 struct pnfs_layout_segment *
6565 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6567 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6568 size_t max_pages = max_response_pages(server);
6569 struct rpc_task *task;
6570 struct rpc_message msg = {
6571 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6572 .rpc_argp = &lgp->args,
6573 .rpc_resp = &lgp->res,
6575 struct rpc_task_setup task_setup_data = {
6576 .rpc_client = server->client,
6577 .rpc_message = &msg,
6578 .callback_ops = &nfs4_layoutget_call_ops,
6579 .callback_data = lgp,
6580 .flags = RPC_TASK_ASYNC,
6582 struct pnfs_layout_segment *lseg = NULL;
6585 dprintk("--> %s\n", __func__);
6587 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6588 if (!lgp->args.layout.pages) {
6589 nfs4_layoutget_release(lgp);
6590 return ERR_PTR(-ENOMEM);
6592 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6594 lgp->res.layoutp = &lgp->args.layout;
6595 lgp->res.seq_res.sr_slot = NULL;
6596 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6597 task = rpc_run_task(&task_setup_data);
6599 return ERR_CAST(task);
6600 status = nfs4_wait_for_completion_rpc_task(task);
6602 status = task->tk_status;
6604 lseg = pnfs_layout_process(lgp);
6606 dprintk("<-- %s status=%d\n", __func__, status);
6608 return ERR_PTR(status);
6613 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6615 struct nfs4_layoutreturn *lrp = calldata;
6617 dprintk("--> %s\n", __func__);
6618 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
6619 &lrp->res.seq_res, task))
6621 rpc_call_start(task);
6624 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6626 struct nfs4_layoutreturn *lrp = calldata;
6627 struct nfs_server *server;
6629 dprintk("--> %s\n", __func__);
6631 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6634 server = NFS_SERVER(lrp->args.inode);
6635 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6636 rpc_restart_call_prepare(task);
6639 dprintk("<-- %s\n", __func__);
6642 static void nfs4_layoutreturn_release(void *calldata)
6644 struct nfs4_layoutreturn *lrp = calldata;
6645 struct pnfs_layout_hdr *lo = lrp->args.layout;
6647 dprintk("--> %s\n", __func__);
6648 spin_lock(&lo->plh_inode->i_lock);
6649 if (lrp->res.lrs_present)
6650 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6651 lo->plh_block_lgets--;
6652 spin_unlock(&lo->plh_inode->i_lock);
6653 pnfs_put_layout_hdr(lrp->args.layout);
6655 dprintk("<-- %s\n", __func__);
6658 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6659 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6660 .rpc_call_done = nfs4_layoutreturn_done,
6661 .rpc_release = nfs4_layoutreturn_release,
6664 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6666 struct rpc_task *task;
6667 struct rpc_message msg = {
6668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6669 .rpc_argp = &lrp->args,
6670 .rpc_resp = &lrp->res,
6672 struct rpc_task_setup task_setup_data = {
6673 .rpc_client = lrp->clp->cl_rpcclient,
6674 .rpc_message = &msg,
6675 .callback_ops = &nfs4_layoutreturn_call_ops,
6676 .callback_data = lrp,
6680 dprintk("--> %s\n", __func__);
6681 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6682 task = rpc_run_task(&task_setup_data);
6684 return PTR_ERR(task);
6685 status = task->tk_status;
6686 dprintk("<-- %s status=%d\n", __func__, status);
6692 * Retrieve the list of Data Server devices from the MDS.
6694 static int _nfs4_getdevicelist(struct nfs_server *server,
6695 const struct nfs_fh *fh,
6696 struct pnfs_devicelist *devlist)
6698 struct nfs4_getdevicelist_args args = {
6700 .layoutclass = server->pnfs_curr_ld->id,
6702 struct nfs4_getdevicelist_res res = {
6705 struct rpc_message msg = {
6706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6712 dprintk("--> %s\n", __func__);
6713 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6715 dprintk("<-- %s status=%d\n", __func__, status);
6719 int nfs4_proc_getdevicelist(struct nfs_server *server,
6720 const struct nfs_fh *fh,
6721 struct pnfs_devicelist *devlist)
6723 struct nfs4_exception exception = { };
6727 err = nfs4_handle_exception(server,
6728 _nfs4_getdevicelist(server, fh, devlist),
6730 } while (exception.retry);
6732 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6733 err, devlist->num_devs);
6737 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6740 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6742 struct nfs4_getdeviceinfo_args args = {
6745 struct nfs4_getdeviceinfo_res res = {
6748 struct rpc_message msg = {
6749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6755 dprintk("--> %s\n", __func__);
6756 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6757 dprintk("<-- %s status=%d\n", __func__, status);
6762 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6764 struct nfs4_exception exception = { };
6768 err = nfs4_handle_exception(server,
6769 _nfs4_proc_getdeviceinfo(server, pdev),
6771 } while (exception.retry);
6774 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6776 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6778 struct nfs4_layoutcommit_data *data = calldata;
6779 struct nfs_server *server = NFS_SERVER(data->args.inode);
6781 if (nfs4_setup_sequence(server, &data->args.seq_args,
6782 &data->res.seq_res, task))
6784 rpc_call_start(task);
6788 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6790 struct nfs4_layoutcommit_data *data = calldata;
6791 struct nfs_server *server = NFS_SERVER(data->args.inode);
6793 if (!nfs4_sequence_done(task, &data->res.seq_res))
6796 switch (task->tk_status) { /* Just ignore these failures */
6797 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6798 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6799 case -NFS4ERR_BADLAYOUT: /* no layout */
6800 case -NFS4ERR_GRACE: /* loca_recalim always false */
6801 task->tk_status = 0;
6804 nfs_post_op_update_inode_force_wcc(data->args.inode,
6808 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6809 rpc_restart_call_prepare(task);
6815 static void nfs4_layoutcommit_release(void *calldata)
6817 struct nfs4_layoutcommit_data *data = calldata;
6818 struct pnfs_layout_segment *lseg, *tmp;
6819 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6821 pnfs_cleanup_layoutcommit(data);
6822 /* Matched by references in pnfs_set_layoutcommit */
6823 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6824 list_del_init(&lseg->pls_lc_list);
6825 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6827 pnfs_put_lseg(lseg);
6830 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6831 smp_mb__after_clear_bit();
6832 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6834 put_rpccred(data->cred);
6838 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6839 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6840 .rpc_call_done = nfs4_layoutcommit_done,
6841 .rpc_release = nfs4_layoutcommit_release,
6845 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6847 struct rpc_message msg = {
6848 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6849 .rpc_argp = &data->args,
6850 .rpc_resp = &data->res,
6851 .rpc_cred = data->cred,
6853 struct rpc_task_setup task_setup_data = {
6854 .task = &data->task,
6855 .rpc_client = NFS_CLIENT(data->args.inode),
6856 .rpc_message = &msg,
6857 .callback_ops = &nfs4_layoutcommit_ops,
6858 .callback_data = data,
6859 .flags = RPC_TASK_ASYNC,
6861 struct rpc_task *task;
6864 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6865 "lbw: %llu inode %lu\n",
6866 data->task.tk_pid, sync,
6867 data->args.lastbytewritten,
6868 data->args.inode->i_ino);
6870 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6871 task = rpc_run_task(&task_setup_data);
6873 return PTR_ERR(task);
6876 status = nfs4_wait_for_completion_rpc_task(task);
6879 status = task->tk_status;
6881 dprintk("%s: status %d\n", __func__, status);
6887 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6888 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6890 struct nfs41_secinfo_no_name_args args = {
6891 .style = SECINFO_STYLE_CURRENT_FH,
6893 struct nfs4_secinfo_res res = {
6896 struct rpc_message msg = {
6897 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6901 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6905 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6906 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6908 struct nfs4_exception exception = { };
6911 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6914 case -NFS4ERR_WRONGSEC:
6915 case -NFS4ERR_NOTSUPP:
6918 err = nfs4_handle_exception(server, err, &exception);
6920 } while (exception.retry);
6926 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6927 struct nfs_fsinfo *info)
6931 rpc_authflavor_t flavor;
6932 struct nfs4_secinfo_flavors *flavors;
6934 page = alloc_page(GFP_KERNEL);
6940 flavors = page_address(page);
6941 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6944 * Fall back on "guess and check" method if
6945 * the server doesn't support SECINFO_NO_NAME
6947 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6948 err = nfs4_find_root_sec(server, fhandle, info);
6954 flavor = nfs_find_best_sec(flavors);
6956 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6966 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6969 struct nfs41_test_stateid_args args = {
6972 struct nfs41_test_stateid_res res;
6973 struct rpc_message msg = {
6974 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6979 dprintk("NFS call test_stateid %p\n", stateid);
6980 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6981 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6982 if (status != NFS_OK) {
6983 dprintk("NFS reply test_stateid: failed, %d\n", status);
6986 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
6991 * nfs41_test_stateid - perform a TEST_STATEID operation
6993 * @server: server / transport on which to perform the operation
6994 * @stateid: state ID to test
6996 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6997 * Otherwise a negative NFS4ERR value is returned if the operation
6998 * failed or the state ID is not currently valid.
7000 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7002 struct nfs4_exception exception = { };
7005 err = _nfs41_test_stateid(server, stateid);
7006 if (err != -NFS4ERR_DELAY)
7008 nfs4_handle_exception(server, err, &exception);
7009 } while (exception.retry);
7013 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7015 struct nfs41_free_stateid_args args = {
7018 struct nfs41_free_stateid_res res;
7019 struct rpc_message msg = {
7020 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
7026 dprintk("NFS call free_stateid %p\n", stateid);
7027 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
7028 status = nfs4_call_sync_sequence(server->client, server, &msg,
7029 &args.seq_args, &res.seq_res, 1);
7030 dprintk("NFS reply free_stateid: %d\n", status);
7035 * nfs41_free_stateid - perform a FREE_STATEID operation
7037 * @server: server / transport on which to perform the operation
7038 * @stateid: state ID to release
7040 * Returns NFS_OK if the server freed "stateid". Otherwise a
7041 * negative NFS4ERR value is returned.
7043 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7045 struct nfs4_exception exception = { };
7048 err = _nfs4_free_stateid(server, stateid);
7049 if (err != -NFS4ERR_DELAY)
7051 nfs4_handle_exception(server, err, &exception);
7052 } while (exception.retry);
7056 static bool nfs41_match_stateid(const nfs4_stateid *s1,
7057 const nfs4_stateid *s2)
7059 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
7062 if (s1->seqid == s2->seqid)
7064 if (s1->seqid == 0 || s2->seqid == 0)
7070 #endif /* CONFIG_NFS_V4_1 */
7072 static bool nfs4_match_stateid(const nfs4_stateid *s1,
7073 const nfs4_stateid *s2)
7075 return nfs4_stateid_match(s1, s2);
7079 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7080 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7081 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7082 .recover_open = nfs4_open_reclaim,
7083 .recover_lock = nfs4_lock_reclaim,
7084 .establish_clid = nfs4_init_clientid,
7085 .get_clid_cred = nfs4_get_setclientid_cred,
7086 .detect_trunking = nfs40_discover_server_trunking,
7089 #if defined(CONFIG_NFS_V4_1)
7090 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
7091 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7092 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7093 .recover_open = nfs4_open_reclaim,
7094 .recover_lock = nfs4_lock_reclaim,
7095 .establish_clid = nfs41_init_clientid,
7096 .get_clid_cred = nfs4_get_exchange_id_cred,
7097 .reclaim_complete = nfs41_proc_reclaim_complete,
7098 .detect_trunking = nfs41_discover_server_trunking,
7100 #endif /* CONFIG_NFS_V4_1 */
7102 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
7103 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7104 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7105 .recover_open = nfs4_open_expired,
7106 .recover_lock = nfs4_lock_expired,
7107 .establish_clid = nfs4_init_clientid,
7108 .get_clid_cred = nfs4_get_setclientid_cred,
7111 #if defined(CONFIG_NFS_V4_1)
7112 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7113 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7114 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7115 .recover_open = nfs41_open_expired,
7116 .recover_lock = nfs41_lock_expired,
7117 .establish_clid = nfs41_init_clientid,
7118 .get_clid_cred = nfs4_get_exchange_id_cred,
7120 #endif /* CONFIG_NFS_V4_1 */
7122 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
7123 .sched_state_renewal = nfs4_proc_async_renew,
7124 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
7125 .renew_lease = nfs4_proc_renew,
7128 #if defined(CONFIG_NFS_V4_1)
7129 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
7130 .sched_state_renewal = nfs41_proc_async_sequence,
7131 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
7132 .renew_lease = nfs4_proc_sequence,
7136 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7138 .call_sync = _nfs4_call_sync,
7139 .match_stateid = nfs4_match_stateid,
7140 .find_root_sec = nfs4_find_root_sec,
7141 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7142 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7143 .state_renewal_ops = &nfs40_state_renewal_ops,
7146 #if defined(CONFIG_NFS_V4_1)
7147 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7149 .call_sync = _nfs4_call_sync_session,
7150 .match_stateid = nfs41_match_stateid,
7151 .find_root_sec = nfs41_find_root_sec,
7152 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7153 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7154 .state_renewal_ops = &nfs41_state_renewal_ops,
7158 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7159 [0] = &nfs_v4_0_minor_ops,
7160 #if defined(CONFIG_NFS_V4_1)
7161 [1] = &nfs_v4_1_minor_ops,
7165 const struct inode_operations nfs4_dir_inode_operations = {
7166 .create = nfs_create,
7167 .lookup = nfs_lookup,
7168 .atomic_open = nfs_atomic_open,
7170 .unlink = nfs_unlink,
7171 .symlink = nfs_symlink,
7175 .rename = nfs_rename,
7176 .permission = nfs_permission,
7177 .getattr = nfs_getattr,
7178 .setattr = nfs_setattr,
7179 .getxattr = generic_getxattr,
7180 .setxattr = generic_setxattr,
7181 .listxattr = generic_listxattr,
7182 .removexattr = generic_removexattr,
7185 static const struct inode_operations nfs4_file_inode_operations = {
7186 .permission = nfs_permission,
7187 .getattr = nfs_getattr,
7188 .setattr = nfs_setattr,
7189 .getxattr = generic_getxattr,
7190 .setxattr = generic_setxattr,
7191 .listxattr = generic_listxattr,
7192 .removexattr = generic_removexattr,
7195 const struct nfs_rpc_ops nfs_v4_clientops = {
7196 .version = 4, /* protocol version */
7197 .dentry_ops = &nfs4_dentry_operations,
7198 .dir_inode_ops = &nfs4_dir_inode_operations,
7199 .file_inode_ops = &nfs4_file_inode_operations,
7200 .file_ops = &nfs4_file_operations,
7201 .getroot = nfs4_proc_get_root,
7202 .submount = nfs4_submount,
7203 .try_mount = nfs4_try_mount,
7204 .getattr = nfs4_proc_getattr,
7205 .setattr = nfs4_proc_setattr,
7206 .lookup = nfs4_proc_lookup,
7207 .access = nfs4_proc_access,
7208 .readlink = nfs4_proc_readlink,
7209 .create = nfs4_proc_create,
7210 .remove = nfs4_proc_remove,
7211 .unlink_setup = nfs4_proc_unlink_setup,
7212 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
7213 .unlink_done = nfs4_proc_unlink_done,
7214 .rename = nfs4_proc_rename,
7215 .rename_setup = nfs4_proc_rename_setup,
7216 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
7217 .rename_done = nfs4_proc_rename_done,
7218 .link = nfs4_proc_link,
7219 .symlink = nfs4_proc_symlink,
7220 .mkdir = nfs4_proc_mkdir,
7221 .rmdir = nfs4_proc_remove,
7222 .readdir = nfs4_proc_readdir,
7223 .mknod = nfs4_proc_mknod,
7224 .statfs = nfs4_proc_statfs,
7225 .fsinfo = nfs4_proc_fsinfo,
7226 .pathconf = nfs4_proc_pathconf,
7227 .set_capabilities = nfs4_server_capabilities,
7228 .decode_dirent = nfs4_decode_dirent,
7229 .read_setup = nfs4_proc_read_setup,
7230 .read_pageio_init = pnfs_pageio_init_read,
7231 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
7232 .read_done = nfs4_read_done,
7233 .write_setup = nfs4_proc_write_setup,
7234 .write_pageio_init = pnfs_pageio_init_write,
7235 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
7236 .write_done = nfs4_write_done,
7237 .commit_setup = nfs4_proc_commit_setup,
7238 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
7239 .commit_done = nfs4_commit_done,
7240 .lock = nfs4_proc_lock,
7241 .clear_acl_cache = nfs4_zap_acl_attr,
7242 .close_context = nfs4_close_context,
7243 .open_context = nfs4_atomic_open,
7244 .have_delegation = nfs4_have_delegation,
7245 .return_delegation = nfs4_inode_return_delegation,
7246 .alloc_client = nfs4_alloc_client,
7247 .init_client = nfs4_init_client,
7248 .free_client = nfs4_free_client,
7249 .create_server = nfs4_create_server,
7250 .clone_server = nfs_clone_server,
7253 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7254 .prefix = XATTR_NAME_NFSV4_ACL,
7255 .list = nfs4_xattr_list_nfs4_acl,
7256 .get = nfs4_xattr_get_nfs4_acl,
7257 .set = nfs4_xattr_set_nfs4_acl,
7260 const struct xattr_handler *nfs4_xattr_handlers[] = {
7261 &nfs4_xattr_nfs4_acl_handler,