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/sunrpc/gss_api.h>
47 #include <linux/nfs.h>
48 #include <linux/nfs4.h>
49 #include <linux/nfs_fs.h>
50 #include <linux/nfs_page.h>
51 #include <linux/nfs_mount.h>
52 #include <linux/namei.h>
53 #include <linux/mount.h>
54 #include <linux/module.h>
55 #include <linux/nfs_idmap.h>
56 #include <linux/sunrpc/bc_xprt.h>
57 #include <linux/xattr.h>
58 #include <linux/utsname.h>
59 #include <linux/freezer.h>
62 #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)
75 static unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE;
78 static int _nfs4_proc_open(struct nfs4_opendata *data);
79 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
80 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
82 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
83 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
84 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
86 struct nfs4_state *state);
87 #ifdef CONFIG_NFS_V4_1
88 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
89 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
91 /* Prevent leaks of NFSv4 errors into userland */
92 static int nfs4_map_errors(int err)
97 case -NFS4ERR_RESOURCE:
99 case -NFS4ERR_WRONGSEC:
101 case -NFS4ERR_BADOWNER:
102 case -NFS4ERR_BADNAME:
105 dprintk("%s could not handle NFSv4 error %d\n",
113 * This is our standard bitmap for GETATTR requests.
115 const u32 nfs4_fattr_bitmap[2] = {
117 | FATTR4_WORD0_CHANGE
120 | FATTR4_WORD0_FILEID,
122 | FATTR4_WORD1_NUMLINKS
124 | FATTR4_WORD1_OWNER_GROUP
125 | FATTR4_WORD1_RAWDEV
126 | FATTR4_WORD1_SPACE_USED
127 | FATTR4_WORD1_TIME_ACCESS
128 | FATTR4_WORD1_TIME_METADATA
129 | FATTR4_WORD1_TIME_MODIFY
132 const u32 nfs4_statfs_bitmap[2] = {
133 FATTR4_WORD0_FILES_AVAIL
134 | FATTR4_WORD0_FILES_FREE
135 | FATTR4_WORD0_FILES_TOTAL,
136 FATTR4_WORD1_SPACE_AVAIL
137 | FATTR4_WORD1_SPACE_FREE
138 | FATTR4_WORD1_SPACE_TOTAL
141 const u32 nfs4_pathconf_bitmap[2] = {
143 | FATTR4_WORD0_MAXNAME,
147 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
148 | FATTR4_WORD0_MAXREAD
149 | FATTR4_WORD0_MAXWRITE
150 | FATTR4_WORD0_LEASE_TIME,
151 FATTR4_WORD1_TIME_DELTA
152 | FATTR4_WORD1_FS_LAYOUT_TYPES,
153 FATTR4_WORD2_LAYOUT_BLKSIZE
156 const u32 nfs4_fs_locations_bitmap[2] = {
158 | FATTR4_WORD0_CHANGE
161 | FATTR4_WORD0_FILEID
162 | FATTR4_WORD0_FS_LOCATIONS,
164 | FATTR4_WORD1_NUMLINKS
166 | FATTR4_WORD1_OWNER_GROUP
167 | FATTR4_WORD1_RAWDEV
168 | FATTR4_WORD1_SPACE_USED
169 | FATTR4_WORD1_TIME_ACCESS
170 | FATTR4_WORD1_TIME_METADATA
171 | FATTR4_WORD1_TIME_MODIFY
172 | FATTR4_WORD1_MOUNTED_ON_FILEID
175 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
176 struct nfs4_readdir_arg *readdir)
180 BUG_ON(readdir->count < 80);
182 readdir->cookie = cookie;
183 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
188 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
193 * NFSv4 servers do not return entries for '.' and '..'
194 * Therefore, we fake these entries here. We let '.'
195 * have cookie 0 and '..' have cookie 1. Note that
196 * when talking to the server, we always send cookie 0
199 start = p = kmap_atomic(*readdir->pages);
202 *p++ = xdr_one; /* next */
203 *p++ = xdr_zero; /* cookie, first word */
204 *p++ = xdr_one; /* cookie, second word */
205 *p++ = xdr_one; /* entry len */
206 memcpy(p, ".\0\0\0", 4); /* entry */
208 *p++ = xdr_one; /* bitmap length */
209 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
210 *p++ = htonl(8); /* attribute buffer length */
211 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
214 *p++ = xdr_one; /* next */
215 *p++ = xdr_zero; /* cookie, first word */
216 *p++ = xdr_two; /* cookie, second word */
217 *p++ = xdr_two; /* entry len */
218 memcpy(p, "..\0\0", 4); /* entry */
220 *p++ = xdr_one; /* bitmap length */
221 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
222 *p++ = htonl(8); /* attribute buffer length */
223 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
225 readdir->pgbase = (char *)p - (char *)start;
226 readdir->count -= readdir->pgbase;
227 kunmap_atomic(start);
230 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
236 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
237 nfs_wait_bit_killable, TASK_KILLABLE);
241 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
248 *timeout = NFS4_POLL_RETRY_MIN;
249 if (*timeout > NFS4_POLL_RETRY_MAX)
250 *timeout = NFS4_POLL_RETRY_MAX;
251 freezable_schedule_timeout_killable(*timeout);
252 if (fatal_signal_pending(current))
258 /* This is the error handling routine for processes that are allowed
261 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
263 struct nfs_client *clp = server->nfs_client;
264 struct nfs4_state *state = exception->state;
265 struct inode *inode = exception->inode;
268 exception->retry = 0;
272 case -NFS4ERR_OPENMODE:
273 if (inode && nfs_have_delegation(inode, FMODE_READ)) {
274 nfs_inode_return_delegation(inode);
275 exception->retry = 1;
280 nfs4_schedule_stateid_recovery(server, state);
281 goto wait_on_recovery;
282 case -NFS4ERR_DELEG_REVOKED:
283 case -NFS4ERR_ADMIN_REVOKED:
284 case -NFS4ERR_BAD_STATEID:
287 nfs_remove_bad_delegation(state->inode);
288 nfs4_schedule_stateid_recovery(server, state);
289 goto wait_on_recovery;
290 case -NFS4ERR_EXPIRED:
292 nfs4_schedule_stateid_recovery(server, state);
293 case -NFS4ERR_STALE_STATEID:
294 case -NFS4ERR_STALE_CLIENTID:
295 nfs4_schedule_lease_recovery(clp);
296 goto wait_on_recovery;
297 #if defined(CONFIG_NFS_V4_1)
298 case -NFS4ERR_BADSESSION:
299 case -NFS4ERR_BADSLOT:
300 case -NFS4ERR_BAD_HIGH_SLOT:
301 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
302 case -NFS4ERR_DEADSESSION:
303 case -NFS4ERR_SEQ_FALSE_RETRY:
304 case -NFS4ERR_SEQ_MISORDERED:
305 dprintk("%s ERROR: %d Reset session\n", __func__,
307 nfs4_schedule_session_recovery(clp->cl_session);
308 exception->retry = 1;
310 #endif /* defined(CONFIG_NFS_V4_1) */
311 case -NFS4ERR_FILE_OPEN:
312 if (exception->timeout > HZ) {
313 /* We have retried a decent amount, time to
322 ret = nfs4_delay(server->client, &exception->timeout);
325 case -NFS4ERR_RETRY_UNCACHED_REP:
326 case -NFS4ERR_OLD_STATEID:
327 exception->retry = 1;
329 case -NFS4ERR_BADOWNER:
330 /* The following works around a Linux server bug! */
331 case -NFS4ERR_BADNAME:
332 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
333 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
334 exception->retry = 1;
335 printk(KERN_WARNING "NFS: v4 server %s "
336 "does not accept raw "
338 "Reenabling the idmapper.\n",
339 server->nfs_client->cl_hostname);
342 /* We failed to handle the error */
343 return nfs4_map_errors(ret);
345 ret = nfs4_wait_clnt_recover(clp);
347 exception->retry = 1;
352 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
354 spin_lock(&clp->cl_lock);
355 if (time_before(clp->cl_last_renewal,timestamp))
356 clp->cl_last_renewal = timestamp;
357 spin_unlock(&clp->cl_lock);
360 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
362 do_renew_lease(server->nfs_client, timestamp);
365 #if defined(CONFIG_NFS_V4_1)
368 * nfs4_free_slot - free a slot and efficiently update slot table.
370 * freeing a slot is trivially done by clearing its respective bit
372 * If the freed slotid equals highest_used_slotid we want to update it
373 * so that the server would be able to size down the slot table if needed,
374 * otherwise we know that the highest_used_slotid is still in use.
375 * When updating highest_used_slotid there may be "holes" in the bitmap
376 * so we need to scan down from highest_used_slotid to 0 looking for the now
377 * highest slotid in use.
378 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
380 * Must be called while holding tbl->slot_tbl_lock
383 nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
385 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
386 /* clear used bit in bitmap */
387 __clear_bit(slotid, tbl->used_slots);
389 /* update highest_used_slotid when it is freed */
390 if (slotid == tbl->highest_used_slotid) {
391 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
392 if (slotid < tbl->max_slots)
393 tbl->highest_used_slotid = slotid;
395 tbl->highest_used_slotid = NFS4_NO_SLOT;
397 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
398 slotid, tbl->highest_used_slotid);
401 bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
403 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
408 * Signal state manager thread if session fore channel is drained
410 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
412 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
413 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
414 nfs4_set_task_privileged, NULL);
418 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
421 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
422 complete(&ses->fc_slot_table.complete);
426 * Signal state manager thread if session back channel is drained
428 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
430 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
431 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
433 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
434 complete(&ses->bc_slot_table.complete);
437 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
439 struct nfs4_slot_table *tbl;
441 tbl = &res->sr_session->fc_slot_table;
443 /* just wake up the next guy waiting since
444 * we may have not consumed a slot after all */
445 dprintk("%s: No slot\n", __func__);
449 spin_lock(&tbl->slot_tbl_lock);
450 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
451 nfs4_check_drain_fc_complete(res->sr_session);
452 spin_unlock(&tbl->slot_tbl_lock);
456 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
458 unsigned long timestamp;
459 struct nfs_client *clp;
462 * sr_status remains 1 if an RPC level error occurred. The server
463 * may or may not have processed the sequence operation..
464 * Proceed as if the server received and processed the sequence
467 if (res->sr_status == 1)
468 res->sr_status = NFS_OK;
470 /* don't increment the sequence number if the task wasn't sent */
471 if (!RPC_WAS_SENT(task))
474 /* Check the SEQUENCE operation status */
475 switch (res->sr_status) {
477 /* Update the slot's sequence and clientid lease timer */
478 ++res->sr_slot->seq_nr;
479 timestamp = res->sr_renewal_time;
480 clp = res->sr_session->clp;
481 do_renew_lease(clp, timestamp);
482 /* Check sequence flags */
483 if (res->sr_status_flags != 0)
484 nfs4_schedule_lease_recovery(clp);
487 /* The server detected a resend of the RPC call and
488 * returned NFS4ERR_DELAY as per Section 2.10.6.2
491 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
493 res->sr_slot - res->sr_session->fc_slot_table.slots,
494 res->sr_slot->seq_nr);
497 /* Just update the slot sequence no. */
498 ++res->sr_slot->seq_nr;
501 /* The session may be reset by one of the error handlers. */
502 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
503 nfs41_sequence_free_slot(res);
506 if (!rpc_restart_call(task))
508 rpc_delay(task, NFS4_POLL_RETRY_MAX);
512 static int nfs4_sequence_done(struct rpc_task *task,
513 struct nfs4_sequence_res *res)
515 if (res->sr_session == NULL)
517 return nfs41_sequence_done(task, res);
521 * nfs4_find_slot - efficiently look for a free slot
523 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
524 * If found, we mark the slot as used, update the highest_used_slotid,
525 * and respectively set up the sequence operation args.
526 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
528 * Note: must be called with under the slot_tbl_lock.
531 nfs4_find_slot(struct nfs4_slot_table *tbl)
534 u32 ret_id = NFS4_NO_SLOT;
536 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
537 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
539 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
540 if (slotid >= tbl->max_slots)
542 __set_bit(slotid, tbl->used_slots);
543 if (slotid > tbl->highest_used_slotid ||
544 tbl->highest_used_slotid == NFS4_NO_SLOT)
545 tbl->highest_used_slotid = slotid;
548 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
549 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
553 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
554 struct nfs4_sequence_res *res, int cache_reply)
556 args->sa_session = NULL;
557 args->sa_cache_this = 0;
559 args->sa_cache_this = 1;
560 res->sr_session = NULL;
564 int nfs41_setup_sequence(struct nfs4_session *session,
565 struct nfs4_sequence_args *args,
566 struct nfs4_sequence_res *res,
567 struct rpc_task *task)
569 struct nfs4_slot *slot;
570 struct nfs4_slot_table *tbl;
573 dprintk("--> %s\n", __func__);
574 /* slot already allocated? */
575 if (res->sr_slot != NULL)
578 tbl = &session->fc_slot_table;
580 spin_lock(&tbl->slot_tbl_lock);
581 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
582 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
583 /* The state manager will wait until the slot table is empty */
584 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
585 spin_unlock(&tbl->slot_tbl_lock);
586 dprintk("%s session is draining\n", __func__);
590 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
591 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
592 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
593 spin_unlock(&tbl->slot_tbl_lock);
594 dprintk("%s enforce FIFO order\n", __func__);
598 slotid = nfs4_find_slot(tbl);
599 if (slotid == NFS4_NO_SLOT) {
600 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
601 spin_unlock(&tbl->slot_tbl_lock);
602 dprintk("<-- %s: no free slots\n", __func__);
605 spin_unlock(&tbl->slot_tbl_lock);
607 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
608 slot = tbl->slots + slotid;
609 args->sa_session = session;
610 args->sa_slotid = slotid;
612 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
614 res->sr_session = session;
616 res->sr_renewal_time = jiffies;
617 res->sr_status_flags = 0;
619 * sr_status is only set in decode_sequence, and so will remain
620 * set to 1 if an rpc level failure occurs.
625 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
627 int nfs4_setup_sequence(const struct nfs_server *server,
628 struct nfs4_sequence_args *args,
629 struct nfs4_sequence_res *res,
630 struct rpc_task *task)
632 struct nfs4_session *session = nfs4_get_session(server);
638 dprintk("--> %s clp %p session %p sr_slot %td\n",
639 __func__, session->clp, session, res->sr_slot ?
640 res->sr_slot - session->fc_slot_table.slots : -1);
642 ret = nfs41_setup_sequence(session, args, res, task);
644 dprintk("<-- %s status=%d\n", __func__, ret);
648 struct nfs41_call_sync_data {
649 const struct nfs_server *seq_server;
650 struct nfs4_sequence_args *seq_args;
651 struct nfs4_sequence_res *seq_res;
654 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
656 struct nfs41_call_sync_data *data = calldata;
658 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
660 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
661 data->seq_res, task))
663 rpc_call_start(task);
666 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
668 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
669 nfs41_call_sync_prepare(task, calldata);
672 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
674 struct nfs41_call_sync_data *data = calldata;
676 nfs41_sequence_done(task, data->seq_res);
679 static const struct rpc_call_ops nfs41_call_sync_ops = {
680 .rpc_call_prepare = nfs41_call_sync_prepare,
681 .rpc_call_done = nfs41_call_sync_done,
684 static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
685 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
686 .rpc_call_done = nfs41_call_sync_done,
689 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
690 struct nfs_server *server,
691 struct rpc_message *msg,
692 struct nfs4_sequence_args *args,
693 struct nfs4_sequence_res *res,
697 struct rpc_task *task;
698 struct nfs41_call_sync_data data = {
699 .seq_server = server,
703 struct rpc_task_setup task_setup = {
706 .callback_ops = &nfs41_call_sync_ops,
707 .callback_data = &data
711 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
712 task = rpc_run_task(&task_setup);
716 ret = task->tk_status;
722 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
723 struct nfs_server *server,
724 struct rpc_message *msg,
725 struct nfs4_sequence_args *args,
726 struct nfs4_sequence_res *res,
729 nfs41_init_sequence(args, res, cache_reply);
730 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
735 void nfs41_init_sequence(struct nfs4_sequence_args *args,
736 struct nfs4_sequence_res *res, int cache_reply)
740 static int nfs4_sequence_done(struct rpc_task *task,
741 struct nfs4_sequence_res *res)
745 #endif /* CONFIG_NFS_V4_1 */
747 int _nfs4_call_sync(struct rpc_clnt *clnt,
748 struct nfs_server *server,
749 struct rpc_message *msg,
750 struct nfs4_sequence_args *args,
751 struct nfs4_sequence_res *res,
754 nfs41_init_sequence(args, res, cache_reply);
755 return rpc_call_sync(clnt, msg, 0);
759 int nfs4_call_sync(struct rpc_clnt *clnt,
760 struct nfs_server *server,
761 struct rpc_message *msg,
762 struct nfs4_sequence_args *args,
763 struct nfs4_sequence_res *res,
766 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
767 args, res, cache_reply);
770 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
772 struct nfs_inode *nfsi = NFS_I(dir);
774 spin_lock(&dir->i_lock);
775 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
776 if (!cinfo->atomic || cinfo->before != dir->i_version)
777 nfs_force_lookup_revalidate(dir);
778 dir->i_version = cinfo->after;
779 spin_unlock(&dir->i_lock);
782 struct nfs4_opendata {
784 struct nfs_openargs o_arg;
785 struct nfs_openres o_res;
786 struct nfs_open_confirmargs c_arg;
787 struct nfs_open_confirmres c_res;
788 struct nfs4_string owner_name;
789 struct nfs4_string group_name;
790 struct nfs_fattr f_attr;
791 struct nfs_fattr dir_attr;
793 struct dentry *dentry;
794 struct nfs4_state_owner *owner;
795 struct nfs4_state *state;
797 unsigned long timestamp;
798 unsigned int rpc_done : 1;
804 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
806 p->o_res.f_attr = &p->f_attr;
807 p->o_res.dir_attr = &p->dir_attr;
808 p->o_res.seqid = p->o_arg.seqid;
809 p->c_res.seqid = p->c_arg.seqid;
810 p->o_res.server = p->o_arg.server;
811 nfs_fattr_init(&p->f_attr);
812 nfs_fattr_init(&p->dir_attr);
813 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
816 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
817 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
818 const struct iattr *attrs,
821 struct dentry *parent = dget_parent(dentry);
822 struct inode *dir = parent->d_inode;
823 struct nfs_server *server = NFS_SERVER(dir);
824 struct nfs4_opendata *p;
826 p = kzalloc(sizeof(*p), gfp_mask);
829 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
830 if (p->o_arg.seqid == NULL)
832 nfs_sb_active(dentry->d_sb);
833 p->dentry = dget(dentry);
836 atomic_inc(&sp->so_count);
837 p->o_arg.fh = NFS_FH(dir);
838 p->o_arg.open_flags = flags;
839 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
840 p->o_arg.clientid = server->nfs_client->cl_clientid;
841 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
842 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
843 p->o_arg.name = &dentry->d_name;
844 p->o_arg.server = server;
845 p->o_arg.bitmask = server->attr_bitmask;
846 p->o_arg.dir_bitmask = server->cache_consistency_bitmask;
847 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
848 if (attrs != NULL && attrs->ia_valid != 0) {
851 p->o_arg.u.attrs = &p->attrs;
852 memcpy(&p->attrs, attrs, sizeof(p->attrs));
855 verf[1] = current->pid;
856 memcpy(p->o_arg.u.verifier.data, verf,
857 sizeof(p->o_arg.u.verifier.data));
859 p->c_arg.fh = &p->o_res.fh;
860 p->c_arg.stateid = &p->o_res.stateid;
861 p->c_arg.seqid = p->o_arg.seqid;
862 nfs4_init_opendata_res(p);
872 static void nfs4_opendata_free(struct kref *kref)
874 struct nfs4_opendata *p = container_of(kref,
875 struct nfs4_opendata, kref);
876 struct super_block *sb = p->dentry->d_sb;
878 nfs_free_seqid(p->o_arg.seqid);
879 if (p->state != NULL)
880 nfs4_put_open_state(p->state);
881 nfs4_put_state_owner(p->owner);
885 nfs_fattr_free_names(&p->f_attr);
889 static void nfs4_opendata_put(struct nfs4_opendata *p)
892 kref_put(&p->kref, nfs4_opendata_free);
895 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
899 ret = rpc_wait_for_completion_task(task);
903 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
907 if (open_mode & (O_EXCL|O_TRUNC))
909 switch (mode & (FMODE_READ|FMODE_WRITE)) {
911 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
912 && state->n_rdonly != 0;
915 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
916 && state->n_wronly != 0;
918 case FMODE_READ|FMODE_WRITE:
919 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
920 && state->n_rdwr != 0;
926 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
928 if (delegation == NULL)
930 if ((delegation->type & fmode) != fmode)
932 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
934 nfs_mark_delegation_referenced(delegation);
938 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
947 case FMODE_READ|FMODE_WRITE:
950 nfs4_state_set_mode_locked(state, state->state | fmode);
953 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
955 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
956 nfs4_stateid_copy(&state->stateid, stateid);
957 nfs4_stateid_copy(&state->open_stateid, stateid);
960 set_bit(NFS_O_RDONLY_STATE, &state->flags);
963 set_bit(NFS_O_WRONLY_STATE, &state->flags);
965 case FMODE_READ|FMODE_WRITE:
966 set_bit(NFS_O_RDWR_STATE, &state->flags);
970 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
972 write_seqlock(&state->seqlock);
973 nfs_set_open_stateid_locked(state, stateid, fmode);
974 write_sequnlock(&state->seqlock);
977 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
980 * Protect the call to nfs4_state_set_mode_locked and
981 * serialise the stateid update
983 write_seqlock(&state->seqlock);
984 if (deleg_stateid != NULL) {
985 nfs4_stateid_copy(&state->stateid, deleg_stateid);
986 set_bit(NFS_DELEGATED_STATE, &state->flags);
988 if (open_stateid != NULL)
989 nfs_set_open_stateid_locked(state, open_stateid, fmode);
990 write_sequnlock(&state->seqlock);
991 spin_lock(&state->owner->so_lock);
992 update_open_stateflags(state, fmode);
993 spin_unlock(&state->owner->so_lock);
996 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
998 struct nfs_inode *nfsi = NFS_I(state->inode);
999 struct nfs_delegation *deleg_cur;
1002 fmode &= (FMODE_READ|FMODE_WRITE);
1005 deleg_cur = rcu_dereference(nfsi->delegation);
1006 if (deleg_cur == NULL)
1009 spin_lock(&deleg_cur->lock);
1010 if (nfsi->delegation != deleg_cur ||
1011 (deleg_cur->type & fmode) != fmode)
1012 goto no_delegation_unlock;
1014 if (delegation == NULL)
1015 delegation = &deleg_cur->stateid;
1016 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1017 goto no_delegation_unlock;
1019 nfs_mark_delegation_referenced(deleg_cur);
1020 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1022 no_delegation_unlock:
1023 spin_unlock(&deleg_cur->lock);
1027 if (!ret && open_stateid != NULL) {
1028 __update_open_stateid(state, open_stateid, NULL, fmode);
1036 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1038 struct nfs_delegation *delegation;
1041 delegation = rcu_dereference(NFS_I(inode)->delegation);
1042 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1047 nfs_inode_return_delegation(inode);
1050 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1052 struct nfs4_state *state = opendata->state;
1053 struct nfs_inode *nfsi = NFS_I(state->inode);
1054 struct nfs_delegation *delegation;
1055 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1056 fmode_t fmode = opendata->o_arg.fmode;
1057 nfs4_stateid stateid;
1061 if (can_open_cached(state, fmode, open_mode)) {
1062 spin_lock(&state->owner->so_lock);
1063 if (can_open_cached(state, fmode, open_mode)) {
1064 update_open_stateflags(state, fmode);
1065 spin_unlock(&state->owner->so_lock);
1066 goto out_return_state;
1068 spin_unlock(&state->owner->so_lock);
1071 delegation = rcu_dereference(nfsi->delegation);
1072 if (!can_open_delegated(delegation, fmode)) {
1076 /* Save the delegation */
1077 nfs4_stateid_copy(&stateid, &delegation->stateid);
1079 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1084 /* Try to update the stateid using the delegation */
1085 if (update_open_stateid(state, NULL, &stateid, fmode))
1086 goto out_return_state;
1089 return ERR_PTR(ret);
1091 atomic_inc(&state->count);
1095 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1097 struct inode *inode;
1098 struct nfs4_state *state = NULL;
1099 struct nfs_delegation *delegation;
1102 if (!data->rpc_done) {
1103 state = nfs4_try_open_cached(data);
1108 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1110 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1111 ret = PTR_ERR(inode);
1115 state = nfs4_get_open_state(inode, data->owner);
1118 if (data->o_res.delegation_type != 0) {
1119 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
1120 int delegation_flags = 0;
1123 delegation = rcu_dereference(NFS_I(inode)->delegation);
1125 delegation_flags = delegation->flags;
1127 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1128 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1129 "returning a delegation for "
1130 "OPEN(CLAIM_DELEGATE_CUR)\n",
1132 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1133 nfs_inode_set_delegation(state->inode,
1134 data->owner->so_cred,
1137 nfs_inode_reclaim_delegation(state->inode,
1138 data->owner->so_cred,
1142 update_open_stateid(state, &data->o_res.stateid, NULL,
1150 return ERR_PTR(ret);
1153 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1155 struct nfs_inode *nfsi = NFS_I(state->inode);
1156 struct nfs_open_context *ctx;
1158 spin_lock(&state->inode->i_lock);
1159 list_for_each_entry(ctx, &nfsi->open_files, list) {
1160 if (ctx->state != state)
1162 get_nfs_open_context(ctx);
1163 spin_unlock(&state->inode->i_lock);
1166 spin_unlock(&state->inode->i_lock);
1167 return ERR_PTR(-ENOENT);
1170 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1172 struct nfs4_opendata *opendata;
1174 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1175 if (opendata == NULL)
1176 return ERR_PTR(-ENOMEM);
1177 opendata->state = state;
1178 atomic_inc(&state->count);
1182 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1184 struct nfs4_state *newstate;
1187 opendata->o_arg.open_flags = 0;
1188 opendata->o_arg.fmode = fmode;
1189 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1190 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1191 nfs4_init_opendata_res(opendata);
1192 ret = _nfs4_recover_proc_open(opendata);
1195 newstate = nfs4_opendata_to_nfs4_state(opendata);
1196 if (IS_ERR(newstate))
1197 return PTR_ERR(newstate);
1198 nfs4_close_state(newstate, fmode);
1203 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1205 struct nfs4_state *newstate;
1208 /* memory barrier prior to reading state->n_* */
1209 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1211 if (state->n_rdwr != 0) {
1212 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1213 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1216 if (newstate != state)
1219 if (state->n_wronly != 0) {
1220 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1221 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1224 if (newstate != state)
1227 if (state->n_rdonly != 0) {
1228 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1229 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1232 if (newstate != state)
1236 * We may have performed cached opens for all three recoveries.
1237 * Check if we need to update the current stateid.
1239 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1240 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1241 write_seqlock(&state->seqlock);
1242 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1243 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1244 write_sequnlock(&state->seqlock);
1251 * reclaim state on the server after a reboot.
1253 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1255 struct nfs_delegation *delegation;
1256 struct nfs4_opendata *opendata;
1257 fmode_t delegation_type = 0;
1260 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1261 if (IS_ERR(opendata))
1262 return PTR_ERR(opendata);
1263 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1264 opendata->o_arg.fh = NFS_FH(state->inode);
1266 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1267 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1268 delegation_type = delegation->type;
1270 opendata->o_arg.u.delegation_type = delegation_type;
1271 status = nfs4_open_recover(opendata, state);
1272 nfs4_opendata_put(opendata);
1276 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1278 struct nfs_server *server = NFS_SERVER(state->inode);
1279 struct nfs4_exception exception = { };
1282 err = _nfs4_do_open_reclaim(ctx, state);
1283 if (err != -NFS4ERR_DELAY)
1285 nfs4_handle_exception(server, err, &exception);
1286 } while (exception.retry);
1290 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1292 struct nfs_open_context *ctx;
1295 ctx = nfs4_state_find_open_context(state);
1297 return PTR_ERR(ctx);
1298 ret = nfs4_do_open_reclaim(ctx, state);
1299 put_nfs_open_context(ctx);
1303 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1305 struct nfs4_opendata *opendata;
1308 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1309 if (IS_ERR(opendata))
1310 return PTR_ERR(opendata);
1311 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1312 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1313 ret = nfs4_open_recover(opendata, state);
1314 nfs4_opendata_put(opendata);
1318 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1320 struct nfs4_exception exception = { };
1321 struct nfs_server *server = NFS_SERVER(state->inode);
1324 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1330 case -NFS4ERR_BADSESSION:
1331 case -NFS4ERR_BADSLOT:
1332 case -NFS4ERR_BAD_HIGH_SLOT:
1333 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1334 case -NFS4ERR_DEADSESSION:
1335 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1337 case -NFS4ERR_STALE_CLIENTID:
1338 case -NFS4ERR_STALE_STATEID:
1339 case -NFS4ERR_EXPIRED:
1340 /* Don't recall a delegation if it was lost */
1341 nfs4_schedule_lease_recovery(server->nfs_client);
1345 * The show must go on: exit, but mark the
1346 * stateid as needing recovery.
1348 case -NFS4ERR_DELEG_REVOKED:
1349 case -NFS4ERR_ADMIN_REVOKED:
1350 case -NFS4ERR_BAD_STATEID:
1351 nfs_inode_find_state_and_recover(state->inode,
1353 nfs4_schedule_stateid_recovery(server, state);
1356 * User RPCSEC_GSS context has expired.
1357 * We cannot recover this stateid now, so
1358 * skip it and allow recovery thread to
1365 err = nfs4_handle_exception(server, err, &exception);
1366 } while (exception.retry);
1371 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1373 struct nfs4_opendata *data = calldata;
1375 data->rpc_status = task->tk_status;
1376 if (data->rpc_status == 0) {
1377 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1378 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1379 renew_lease(data->o_res.server, data->timestamp);
1384 static void nfs4_open_confirm_release(void *calldata)
1386 struct nfs4_opendata *data = calldata;
1387 struct nfs4_state *state = NULL;
1389 /* If this request hasn't been cancelled, do nothing */
1390 if (data->cancelled == 0)
1392 /* In case of error, no cleanup! */
1393 if (!data->rpc_done)
1395 state = nfs4_opendata_to_nfs4_state(data);
1397 nfs4_close_state(state, data->o_arg.fmode);
1399 nfs4_opendata_put(data);
1402 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1403 .rpc_call_done = nfs4_open_confirm_done,
1404 .rpc_release = nfs4_open_confirm_release,
1408 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1410 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1412 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1413 struct rpc_task *task;
1414 struct rpc_message msg = {
1415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1416 .rpc_argp = &data->c_arg,
1417 .rpc_resp = &data->c_res,
1418 .rpc_cred = data->owner->so_cred,
1420 struct rpc_task_setup task_setup_data = {
1421 .rpc_client = server->client,
1422 .rpc_message = &msg,
1423 .callback_ops = &nfs4_open_confirm_ops,
1424 .callback_data = data,
1425 .workqueue = nfsiod_workqueue,
1426 .flags = RPC_TASK_ASYNC,
1430 kref_get(&data->kref);
1432 data->rpc_status = 0;
1433 data->timestamp = jiffies;
1434 task = rpc_run_task(&task_setup_data);
1436 return PTR_ERR(task);
1437 status = nfs4_wait_for_completion_rpc_task(task);
1439 data->cancelled = 1;
1442 status = data->rpc_status;
1447 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1449 struct nfs4_opendata *data = calldata;
1450 struct nfs4_state_owner *sp = data->owner;
1452 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1455 * Check if we still need to send an OPEN call, or if we can use
1456 * a delegation instead.
1458 if (data->state != NULL) {
1459 struct nfs_delegation *delegation;
1461 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1464 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1465 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1466 can_open_delegated(delegation, data->o_arg.fmode))
1467 goto unlock_no_action;
1470 /* Update client id. */
1471 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1472 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1473 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1474 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1476 data->timestamp = jiffies;
1477 if (nfs4_setup_sequence(data->o_arg.server,
1478 &data->o_arg.seq_args,
1479 &data->o_res.seq_res, task))
1481 rpc_call_start(task);
1486 task->tk_action = NULL;
1490 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1492 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1493 nfs4_open_prepare(task, calldata);
1496 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1498 struct nfs4_opendata *data = calldata;
1500 data->rpc_status = task->tk_status;
1502 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1505 if (task->tk_status == 0) {
1506 switch (data->o_res.f_attr->mode & S_IFMT) {
1510 data->rpc_status = -ELOOP;
1513 data->rpc_status = -EISDIR;
1516 data->rpc_status = -ENOTDIR;
1518 renew_lease(data->o_res.server, data->timestamp);
1519 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1520 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1525 static void nfs4_open_release(void *calldata)
1527 struct nfs4_opendata *data = calldata;
1528 struct nfs4_state *state = NULL;
1530 /* If this request hasn't been cancelled, do nothing */
1531 if (data->cancelled == 0)
1533 /* In case of error, no cleanup! */
1534 if (data->rpc_status != 0 || !data->rpc_done)
1536 /* In case we need an open_confirm, no cleanup! */
1537 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1539 state = nfs4_opendata_to_nfs4_state(data);
1541 nfs4_close_state(state, data->o_arg.fmode);
1543 nfs4_opendata_put(data);
1546 static const struct rpc_call_ops nfs4_open_ops = {
1547 .rpc_call_prepare = nfs4_open_prepare,
1548 .rpc_call_done = nfs4_open_done,
1549 .rpc_release = nfs4_open_release,
1552 static const struct rpc_call_ops nfs4_recover_open_ops = {
1553 .rpc_call_prepare = nfs4_recover_open_prepare,
1554 .rpc_call_done = nfs4_open_done,
1555 .rpc_release = nfs4_open_release,
1558 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1560 struct inode *dir = data->dir->d_inode;
1561 struct nfs_server *server = NFS_SERVER(dir);
1562 struct nfs_openargs *o_arg = &data->o_arg;
1563 struct nfs_openres *o_res = &data->o_res;
1564 struct rpc_task *task;
1565 struct rpc_message msg = {
1566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1569 .rpc_cred = data->owner->so_cred,
1571 struct rpc_task_setup task_setup_data = {
1572 .rpc_client = server->client,
1573 .rpc_message = &msg,
1574 .callback_ops = &nfs4_open_ops,
1575 .callback_data = data,
1576 .workqueue = nfsiod_workqueue,
1577 .flags = RPC_TASK_ASYNC,
1581 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1582 kref_get(&data->kref);
1584 data->rpc_status = 0;
1585 data->cancelled = 0;
1587 task_setup_data.callback_ops = &nfs4_recover_open_ops;
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;
1602 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1604 struct inode *dir = data->dir->d_inode;
1605 struct nfs_openres *o_res = &data->o_res;
1608 status = nfs4_run_open_task(data, 1);
1609 if (status != 0 || !data->rpc_done)
1612 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1614 nfs_refresh_inode(dir, o_res->dir_attr);
1616 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1617 status = _nfs4_proc_open_confirm(data);
1626 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1628 static int _nfs4_proc_open(struct nfs4_opendata *data)
1630 struct inode *dir = data->dir->d_inode;
1631 struct nfs_server *server = NFS_SERVER(dir);
1632 struct nfs_openargs *o_arg = &data->o_arg;
1633 struct nfs_openres *o_res = &data->o_res;
1636 status = nfs4_run_open_task(data, 0);
1637 if (!data->rpc_done)
1640 if (status == -NFS4ERR_BADNAME &&
1641 !(o_arg->open_flags & O_CREAT))
1646 nfs_fattr_map_and_free_names(server, &data->f_attr);
1648 if (o_arg->open_flags & O_CREAT) {
1649 update_changeattr(dir, &o_res->cinfo);
1650 nfs_post_op_update_inode(dir, o_res->dir_attr);
1652 nfs_refresh_inode(dir, o_res->dir_attr);
1653 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1654 server->caps &= ~NFS_CAP_POSIX_LOCK;
1655 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1656 status = _nfs4_proc_open_confirm(data);
1660 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1661 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1665 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1670 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1671 ret = nfs4_wait_clnt_recover(clp);
1674 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1675 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1677 nfs4_schedule_state_manager(clp);
1683 static int nfs4_recover_expired_lease(struct nfs_server *server)
1685 return nfs4_client_recover_expired_lease(server->nfs_client);
1690 * reclaim state on the server after a network partition.
1691 * Assumes caller holds the appropriate lock
1693 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1695 struct nfs4_opendata *opendata;
1698 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1699 if (IS_ERR(opendata))
1700 return PTR_ERR(opendata);
1701 ret = nfs4_open_recover(opendata, state);
1703 d_drop(ctx->dentry);
1704 nfs4_opendata_put(opendata);
1708 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1710 struct nfs_server *server = NFS_SERVER(state->inode);
1711 struct nfs4_exception exception = { };
1715 err = _nfs4_open_expired(ctx, state);
1719 case -NFS4ERR_GRACE:
1720 case -NFS4ERR_DELAY:
1721 nfs4_handle_exception(server, err, &exception);
1724 } while (exception.retry);
1729 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1731 struct nfs_open_context *ctx;
1734 ctx = nfs4_state_find_open_context(state);
1736 return PTR_ERR(ctx);
1737 ret = nfs4_do_open_expired(ctx, state);
1738 put_nfs_open_context(ctx);
1742 #if defined(CONFIG_NFS_V4_1)
1743 static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *stateid, unsigned int flags)
1745 int status = NFS_OK;
1746 struct nfs_server *server = NFS_SERVER(state->inode);
1748 if (state->flags & flags) {
1749 status = nfs41_test_stateid(server, stateid);
1750 if (status != NFS_OK) {
1751 nfs41_free_stateid(server, stateid);
1752 state->flags &= ~flags;
1758 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1760 int deleg_status, open_status;
1761 int deleg_flags = 1 << NFS_DELEGATED_STATE;
1762 int open_flags = (1 << NFS_O_RDONLY_STATE) | (1 << NFS_O_WRONLY_STATE) | (1 << NFS_O_RDWR_STATE);
1764 deleg_status = nfs41_check_expired_stateid(state, &state->stateid, deleg_flags);
1765 open_status = nfs41_check_expired_stateid(state, &state->open_stateid, open_flags);
1767 if ((deleg_status == NFS_OK) && (open_status == NFS_OK))
1769 return nfs4_open_expired(sp, state);
1774 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1775 * fields corresponding to attributes that were used to store the verifier.
1776 * Make sure we clobber those fields in the later setattr call
1778 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1780 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1781 !(sattr->ia_valid & ATTR_ATIME_SET))
1782 sattr->ia_valid |= ATTR_ATIME;
1784 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1785 !(sattr->ia_valid & ATTR_MTIME_SET))
1786 sattr->ia_valid |= ATTR_MTIME;
1790 * Returns a referenced nfs4_state
1792 static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1794 struct nfs4_state_owner *sp;
1795 struct nfs4_state *state = NULL;
1796 struct nfs_server *server = NFS_SERVER(dir);
1797 struct nfs4_opendata *opendata;
1800 /* Protect against reboot recovery conflicts */
1802 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1804 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1807 status = nfs4_recover_expired_lease(server);
1809 goto err_put_state_owner;
1810 if (dentry->d_inode != NULL)
1811 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1813 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1814 if (opendata == NULL)
1815 goto err_put_state_owner;
1817 if (dentry->d_inode != NULL)
1818 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1820 status = _nfs4_proc_open(opendata);
1822 goto err_opendata_put;
1824 state = nfs4_opendata_to_nfs4_state(opendata);
1825 status = PTR_ERR(state);
1827 goto err_opendata_put;
1828 if (server->caps & NFS_CAP_POSIX_LOCK)
1829 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1831 if (opendata->o_arg.open_flags & O_EXCL) {
1832 nfs4_exclusive_attrset(opendata, sattr);
1834 nfs_fattr_init(opendata->o_res.f_attr);
1835 status = nfs4_do_setattr(state->inode, cred,
1836 opendata->o_res.f_attr, sattr,
1839 nfs_setattr_update_inode(state->inode, sattr);
1840 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1842 nfs4_opendata_put(opendata);
1843 nfs4_put_state_owner(sp);
1847 nfs4_opendata_put(opendata);
1848 err_put_state_owner:
1849 nfs4_put_state_owner(sp);
1856 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1858 struct nfs4_exception exception = { };
1859 struct nfs4_state *res;
1863 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1866 /* NOTE: BAD_SEQID means the server and client disagree about the
1867 * book-keeping w.r.t. state-changing operations
1868 * (OPEN/CLOSE/LOCK/LOCKU...)
1869 * It is actually a sign of a bug on the client or on the server.
1871 * If we receive a BAD_SEQID error in the particular case of
1872 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1873 * have unhashed the old state_owner for us, and that we can
1874 * therefore safely retry using a new one. We should still warn
1875 * the user though...
1877 if (status == -NFS4ERR_BAD_SEQID) {
1878 pr_warn_ratelimited("NFS: v4 server %s "
1879 " returned a bad sequence-id error!\n",
1880 NFS_SERVER(dir)->nfs_client->cl_hostname);
1881 exception.retry = 1;
1885 * BAD_STATEID on OPEN means that the server cancelled our
1886 * state before it received the OPEN_CONFIRM.
1887 * Recover by retrying the request as per the discussion
1888 * on Page 181 of RFC3530.
1890 if (status == -NFS4ERR_BAD_STATEID) {
1891 exception.retry = 1;
1894 if (status == -EAGAIN) {
1895 /* We must have found a delegation */
1896 exception.retry = 1;
1899 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1900 status, &exception));
1901 } while (exception.retry);
1905 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1906 struct nfs_fattr *fattr, struct iattr *sattr,
1907 struct nfs4_state *state)
1909 struct nfs_server *server = NFS_SERVER(inode);
1910 struct nfs_setattrargs arg = {
1911 .fh = NFS_FH(inode),
1914 .bitmask = server->attr_bitmask,
1916 struct nfs_setattrres res = {
1920 struct rpc_message msg = {
1921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1926 unsigned long timestamp = jiffies;
1929 nfs_fattr_init(fattr);
1931 if (state != NULL) {
1932 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
1933 current->files, current->tgid);
1934 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
1936 /* Use that stateid */
1938 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1940 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1941 if (status == 0 && state != NULL)
1942 renew_lease(server, timestamp);
1946 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1947 struct nfs_fattr *fattr, struct iattr *sattr,
1948 struct nfs4_state *state)
1950 struct nfs_server *server = NFS_SERVER(inode);
1951 struct nfs4_exception exception = {
1957 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
1959 case -NFS4ERR_OPENMODE:
1960 if (state && !(state->state & FMODE_WRITE)) {
1962 if (sattr->ia_valid & ATTR_OPEN)
1967 err = nfs4_handle_exception(server, err, &exception);
1968 } while (exception.retry);
1973 struct nfs4_closedata {
1974 struct inode *inode;
1975 struct nfs4_state *state;
1976 struct nfs_closeargs arg;
1977 struct nfs_closeres res;
1978 struct nfs_fattr fattr;
1979 unsigned long timestamp;
1984 static void nfs4_free_closedata(void *data)
1986 struct nfs4_closedata *calldata = data;
1987 struct nfs4_state_owner *sp = calldata->state->owner;
1988 struct super_block *sb = calldata->state->inode->i_sb;
1991 pnfs_roc_release(calldata->state->inode);
1992 nfs4_put_open_state(calldata->state);
1993 nfs_free_seqid(calldata->arg.seqid);
1994 nfs4_put_state_owner(sp);
1995 nfs_sb_deactive(sb);
1999 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2002 spin_lock(&state->owner->so_lock);
2003 if (!(fmode & FMODE_READ))
2004 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2005 if (!(fmode & FMODE_WRITE))
2006 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2007 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2008 spin_unlock(&state->owner->so_lock);
2011 static void nfs4_close_done(struct rpc_task *task, void *data)
2013 struct nfs4_closedata *calldata = data;
2014 struct nfs4_state *state = calldata->state;
2015 struct nfs_server *server = NFS_SERVER(calldata->inode);
2017 dprintk("%s: begin!\n", __func__);
2018 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2020 /* hmm. we are done with the inode, and in the process of freeing
2021 * the state_owner. we keep this around to process errors
2023 switch (task->tk_status) {
2026 pnfs_roc_set_barrier(state->inode,
2027 calldata->roc_barrier);
2028 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2029 renew_lease(server, calldata->timestamp);
2030 nfs4_close_clear_stateid_flags(state,
2031 calldata->arg.fmode);
2033 case -NFS4ERR_STALE_STATEID:
2034 case -NFS4ERR_OLD_STATEID:
2035 case -NFS4ERR_BAD_STATEID:
2036 case -NFS4ERR_EXPIRED:
2037 if (calldata->arg.fmode == 0)
2040 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2041 rpc_restart_call_prepare(task);
2043 nfs_release_seqid(calldata->arg.seqid);
2044 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2045 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2048 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2050 struct nfs4_closedata *calldata = data;
2051 struct nfs4_state *state = calldata->state;
2054 dprintk("%s: begin!\n", __func__);
2055 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2058 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2059 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2060 spin_lock(&state->owner->so_lock);
2061 /* Calculate the change in open mode */
2062 if (state->n_rdwr == 0) {
2063 if (state->n_rdonly == 0) {
2064 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2065 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2066 calldata->arg.fmode &= ~FMODE_READ;
2068 if (state->n_wronly == 0) {
2069 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2070 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2071 calldata->arg.fmode &= ~FMODE_WRITE;
2074 spin_unlock(&state->owner->so_lock);
2077 /* Note: exit _without_ calling nfs4_close_done */
2078 task->tk_action = NULL;
2082 if (calldata->arg.fmode == 0) {
2083 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2084 if (calldata->roc &&
2085 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2086 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2092 nfs_fattr_init(calldata->res.fattr);
2093 calldata->timestamp = jiffies;
2094 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2095 &calldata->arg.seq_args,
2096 &calldata->res.seq_res,
2099 rpc_call_start(task);
2101 dprintk("%s: done!\n", __func__);
2104 static const struct rpc_call_ops nfs4_close_ops = {
2105 .rpc_call_prepare = nfs4_close_prepare,
2106 .rpc_call_done = nfs4_close_done,
2107 .rpc_release = nfs4_free_closedata,
2111 * It is possible for data to be read/written from a mem-mapped file
2112 * after the sys_close call (which hits the vfs layer as a flush).
2113 * This means that we can't safely call nfsv4 close on a file until
2114 * the inode is cleared. This in turn means that we are not good
2115 * NFSv4 citizens - we do not indicate to the server to update the file's
2116 * share state even when we are done with one of the three share
2117 * stateid's in the inode.
2119 * NOTE: Caller must be holding the sp->so_owner semaphore!
2121 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2123 struct nfs_server *server = NFS_SERVER(state->inode);
2124 struct nfs4_closedata *calldata;
2125 struct nfs4_state_owner *sp = state->owner;
2126 struct rpc_task *task;
2127 struct rpc_message msg = {
2128 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2129 .rpc_cred = state->owner->so_cred,
2131 struct rpc_task_setup task_setup_data = {
2132 .rpc_client = server->client,
2133 .rpc_message = &msg,
2134 .callback_ops = &nfs4_close_ops,
2135 .workqueue = nfsiod_workqueue,
2136 .flags = RPC_TASK_ASYNC,
2138 int status = -ENOMEM;
2140 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2141 if (calldata == NULL)
2143 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2144 calldata->inode = state->inode;
2145 calldata->state = state;
2146 calldata->arg.fh = NFS_FH(state->inode);
2147 calldata->arg.stateid = &state->open_stateid;
2148 /* Serialization for the sequence id */
2149 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2150 if (calldata->arg.seqid == NULL)
2151 goto out_free_calldata;
2152 calldata->arg.fmode = 0;
2153 calldata->arg.bitmask = server->cache_consistency_bitmask;
2154 calldata->res.fattr = &calldata->fattr;
2155 calldata->res.seqid = calldata->arg.seqid;
2156 calldata->res.server = server;
2157 calldata->roc = roc;
2158 nfs_sb_active(calldata->inode->i_sb);
2160 msg.rpc_argp = &calldata->arg;
2161 msg.rpc_resp = &calldata->res;
2162 task_setup_data.callback_data = calldata;
2163 task = rpc_run_task(&task_setup_data);
2165 return PTR_ERR(task);
2168 status = rpc_wait_for_completion_task(task);
2175 pnfs_roc_release(state->inode);
2176 nfs4_put_open_state(state);
2177 nfs4_put_state_owner(sp);
2181 static struct inode *
2182 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2184 struct nfs4_state *state;
2186 /* Protect against concurrent sillydeletes */
2187 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
2189 return ERR_CAST(state);
2191 return igrab(state->inode);
2194 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2196 if (ctx->state == NULL)
2199 nfs4_close_sync(ctx->state, ctx->mode);
2201 nfs4_close_state(ctx->state, ctx->mode);
2204 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2206 struct nfs4_server_caps_arg args = {
2209 struct nfs4_server_caps_res res = {};
2210 struct rpc_message msg = {
2211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2217 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2219 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2220 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2221 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2222 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2223 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2224 NFS_CAP_CTIME|NFS_CAP_MTIME);
2225 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2226 server->caps |= NFS_CAP_ACLS;
2227 if (res.has_links != 0)
2228 server->caps |= NFS_CAP_HARDLINKS;
2229 if (res.has_symlinks != 0)
2230 server->caps |= NFS_CAP_SYMLINKS;
2231 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2232 server->caps |= NFS_CAP_FILEID;
2233 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2234 server->caps |= NFS_CAP_MODE;
2235 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2236 server->caps |= NFS_CAP_NLINK;
2237 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2238 server->caps |= NFS_CAP_OWNER;
2239 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2240 server->caps |= NFS_CAP_OWNER_GROUP;
2241 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2242 server->caps |= NFS_CAP_ATIME;
2243 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2244 server->caps |= NFS_CAP_CTIME;
2245 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2246 server->caps |= NFS_CAP_MTIME;
2248 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2249 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2250 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2251 server->acl_bitmask = res.acl_bitmask;
2252 server->fh_expire_type = res.fh_expire_type;
2258 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2260 struct nfs4_exception exception = { };
2263 err = nfs4_handle_exception(server,
2264 _nfs4_server_capabilities(server, fhandle),
2266 } while (exception.retry);
2270 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2271 struct nfs_fsinfo *info)
2273 struct nfs4_lookup_root_arg args = {
2274 .bitmask = nfs4_fattr_bitmap,
2276 struct nfs4_lookup_res res = {
2278 .fattr = info->fattr,
2281 struct rpc_message msg = {
2282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2287 nfs_fattr_init(info->fattr);
2288 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2291 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2292 struct nfs_fsinfo *info)
2294 struct nfs4_exception exception = { };
2297 err = _nfs4_lookup_root(server, fhandle, info);
2300 case -NFS4ERR_WRONGSEC:
2303 err = nfs4_handle_exception(server, err, &exception);
2305 } while (exception.retry);
2310 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2311 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2313 struct rpc_auth *auth;
2316 auth = rpcauth_create(flavor, server->client);
2321 ret = nfs4_lookup_root(server, fhandle, info);
2326 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2327 struct nfs_fsinfo *info)
2329 int i, len, status = 0;
2330 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2332 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2333 flav_array[len] = RPC_AUTH_NULL;
2336 for (i = 0; i < len; i++) {
2337 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2338 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2343 * -EACCESS could mean that the user doesn't have correct permissions
2344 * to access the mount. It could also mean that we tried to mount
2345 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2346 * existing mount programs don't handle -EACCES very well so it should
2347 * be mapped to -EPERM instead.
2349 if (status == -EACCES)
2355 * get the file handle for the "/" directory on the server
2357 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2358 struct nfs_fsinfo *info)
2360 int minor_version = server->nfs_client->cl_minorversion;
2361 int status = nfs4_lookup_root(server, fhandle, info);
2362 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2364 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2365 * by nfs4_map_errors() as this function exits.
2367 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2369 status = nfs4_server_capabilities(server, fhandle);
2371 status = nfs4_do_fsinfo(server, fhandle, info);
2372 return nfs4_map_errors(status);
2376 * Get locations and (maybe) other attributes of a referral.
2377 * Note that we'll actually follow the referral later when
2378 * we detect fsid mismatch in inode revalidation
2380 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2381 const struct qstr *name, struct nfs_fattr *fattr,
2382 struct nfs_fh *fhandle)
2384 int status = -ENOMEM;
2385 struct page *page = NULL;
2386 struct nfs4_fs_locations *locations = NULL;
2388 page = alloc_page(GFP_KERNEL);
2391 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2392 if (locations == NULL)
2395 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2398 /* Make sure server returned a different fsid for the referral */
2399 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2400 dprintk("%s: server did not return a different fsid for"
2401 " a referral at %s\n", __func__, name->name);
2405 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2406 nfs_fixup_referral_attributes(&locations->fattr);
2408 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2409 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2410 memset(fhandle, 0, sizeof(struct nfs_fh));
2418 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2420 struct nfs4_getattr_arg args = {
2422 .bitmask = server->attr_bitmask,
2424 struct nfs4_getattr_res res = {
2428 struct rpc_message msg = {
2429 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2434 nfs_fattr_init(fattr);
2435 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2438 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2440 struct nfs4_exception exception = { };
2443 err = nfs4_handle_exception(server,
2444 _nfs4_proc_getattr(server, fhandle, fattr),
2446 } while (exception.retry);
2451 * The file is not closed if it is opened due to the a request to change
2452 * the size of the file. The open call will not be needed once the
2453 * VFS layer lookup-intents are implemented.
2455 * Close is called when the inode is destroyed.
2456 * If we haven't opened the file for O_WRONLY, we
2457 * need to in the size_change case to obtain a stateid.
2460 * Because OPEN is always done by name in nfsv4, it is
2461 * possible that we opened a different file by the same
2462 * name. We can recognize this race condition, but we
2463 * can't do anything about it besides returning an error.
2465 * This will be fixed with VFS changes (lookup-intent).
2468 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2469 struct iattr *sattr)
2471 struct inode *inode = dentry->d_inode;
2472 struct rpc_cred *cred = NULL;
2473 struct nfs4_state *state = NULL;
2476 if (pnfs_ld_layoutret_on_setattr(inode))
2477 pnfs_return_layout(inode);
2479 nfs_fattr_init(fattr);
2481 /* Search for an existing open(O_WRITE) file */
2482 if (sattr->ia_valid & ATTR_FILE) {
2483 struct nfs_open_context *ctx;
2485 ctx = nfs_file_open_context(sattr->ia_file);
2492 /* Deal with open(O_TRUNC) */
2493 if (sattr->ia_valid & ATTR_OPEN)
2494 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2496 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2498 nfs_setattr_update_inode(inode, sattr);
2502 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2503 const struct qstr *name, struct nfs_fh *fhandle,
2504 struct nfs_fattr *fattr)
2506 struct nfs_server *server = NFS_SERVER(dir);
2508 struct nfs4_lookup_arg args = {
2509 .bitmask = server->attr_bitmask,
2510 .dir_fh = NFS_FH(dir),
2513 struct nfs4_lookup_res res = {
2518 struct rpc_message msg = {
2519 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2524 nfs_fattr_init(fattr);
2526 dprintk("NFS call lookup %s\n", name->name);
2527 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2528 dprintk("NFS reply lookup: %d\n", status);
2532 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2534 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2535 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2536 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2540 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2541 struct qstr *name, struct nfs_fh *fhandle,
2542 struct nfs_fattr *fattr)
2544 struct nfs4_exception exception = { };
2545 struct rpc_clnt *client = *clnt;
2548 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2550 case -NFS4ERR_BADNAME:
2553 case -NFS4ERR_MOVED:
2554 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2556 case -NFS4ERR_WRONGSEC:
2558 if (client != *clnt)
2561 client = nfs4_create_sec_client(client, dir, name);
2563 return PTR_ERR(client);
2565 exception.retry = 1;
2568 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2570 } while (exception.retry);
2575 else if (client != *clnt)
2576 rpc_shutdown_client(client);
2581 static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2582 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2585 struct rpc_clnt *client = NFS_CLIENT(dir);
2587 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2588 if (client != NFS_CLIENT(dir)) {
2589 rpc_shutdown_client(client);
2590 nfs_fixup_secinfo_attributes(fattr);
2596 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2597 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2600 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2602 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2604 rpc_shutdown_client(client);
2605 return ERR_PTR(status);
2610 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2612 struct nfs_server *server = NFS_SERVER(inode);
2613 struct nfs4_accessargs args = {
2614 .fh = NFS_FH(inode),
2615 .bitmask = server->cache_consistency_bitmask,
2617 struct nfs4_accessres res = {
2620 struct rpc_message msg = {
2621 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2624 .rpc_cred = entry->cred,
2626 int mode = entry->mask;
2630 * Determine which access bits we want to ask for...
2632 if (mode & MAY_READ)
2633 args.access |= NFS4_ACCESS_READ;
2634 if (S_ISDIR(inode->i_mode)) {
2635 if (mode & MAY_WRITE)
2636 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2637 if (mode & MAY_EXEC)
2638 args.access |= NFS4_ACCESS_LOOKUP;
2640 if (mode & MAY_WRITE)
2641 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2642 if (mode & MAY_EXEC)
2643 args.access |= NFS4_ACCESS_EXECUTE;
2646 res.fattr = nfs_alloc_fattr();
2647 if (res.fattr == NULL)
2650 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2653 if (res.access & NFS4_ACCESS_READ)
2654 entry->mask |= MAY_READ;
2655 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2656 entry->mask |= MAY_WRITE;
2657 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2658 entry->mask |= MAY_EXEC;
2659 nfs_refresh_inode(inode, res.fattr);
2661 nfs_free_fattr(res.fattr);
2665 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2667 struct nfs4_exception exception = { };
2670 err = nfs4_handle_exception(NFS_SERVER(inode),
2671 _nfs4_proc_access(inode, entry),
2673 } while (exception.retry);
2678 * TODO: For the time being, we don't try to get any attributes
2679 * along with any of the zero-copy operations READ, READDIR,
2682 * In the case of the first three, we want to put the GETATTR
2683 * after the read-type operation -- this is because it is hard
2684 * to predict the length of a GETATTR response in v4, and thus
2685 * align the READ data correctly. This means that the GETATTR
2686 * may end up partially falling into the page cache, and we should
2687 * shift it into the 'tail' of the xdr_buf before processing.
2688 * To do this efficiently, we need to know the total length
2689 * of data received, which doesn't seem to be available outside
2692 * In the case of WRITE, we also want to put the GETATTR after
2693 * the operation -- in this case because we want to make sure
2694 * we get the post-operation mtime and size. This means that
2695 * we can't use xdr_encode_pages() as written: we need a variant
2696 * of it which would leave room in the 'tail' iovec.
2698 * Both of these changes to the XDR layer would in fact be quite
2699 * minor, but I decided to leave them for a subsequent patch.
2701 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2702 unsigned int pgbase, unsigned int pglen)
2704 struct nfs4_readlink args = {
2705 .fh = NFS_FH(inode),
2710 struct nfs4_readlink_res res;
2711 struct rpc_message msg = {
2712 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2717 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2720 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2721 unsigned int pgbase, unsigned int pglen)
2723 struct nfs4_exception exception = { };
2726 err = nfs4_handle_exception(NFS_SERVER(inode),
2727 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2729 } while (exception.retry);
2735 * We will need to arrange for the VFS layer to provide an atomic open.
2736 * Until then, this create/open method is prone to inefficiency and race
2737 * conditions due to the lookup, create, and open VFS calls from sys_open()
2738 * placed on the wire.
2740 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2741 * The file will be opened again in the subsequent VFS open call
2742 * (nfs4_proc_file_open).
2744 * The open for read will just hang around to be used by any process that
2745 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2749 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2750 int flags, struct nfs_open_context *ctx)
2752 struct dentry *de = dentry;
2753 struct nfs4_state *state;
2754 struct rpc_cred *cred = NULL;
2763 sattr->ia_mode &= ~current_umask();
2764 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
2766 if (IS_ERR(state)) {
2767 status = PTR_ERR(state);
2770 d_add(dentry, igrab(state->inode));
2771 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2775 nfs4_close_sync(state, fmode);
2780 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2782 struct nfs_server *server = NFS_SERVER(dir);
2783 struct nfs_removeargs args = {
2785 .name.len = name->len,
2786 .name.name = name->name,
2787 .bitmask = server->attr_bitmask,
2789 struct nfs_removeres res = {
2792 struct rpc_message msg = {
2793 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2797 int status = -ENOMEM;
2799 res.dir_attr = nfs_alloc_fattr();
2800 if (res.dir_attr == NULL)
2803 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2805 update_changeattr(dir, &res.cinfo);
2806 nfs_post_op_update_inode(dir, res.dir_attr);
2808 nfs_free_fattr(res.dir_attr);
2813 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2815 struct nfs4_exception exception = { };
2818 err = nfs4_handle_exception(NFS_SERVER(dir),
2819 _nfs4_proc_remove(dir, name),
2821 } while (exception.retry);
2825 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2827 struct nfs_server *server = NFS_SERVER(dir);
2828 struct nfs_removeargs *args = msg->rpc_argp;
2829 struct nfs_removeres *res = msg->rpc_resp;
2831 args->bitmask = server->cache_consistency_bitmask;
2832 res->server = server;
2833 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2834 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2837 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2839 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2840 &data->args.seq_args,
2844 rpc_call_start(task);
2847 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2849 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2851 if (!nfs4_sequence_done(task, &res->seq_res))
2853 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2855 update_changeattr(dir, &res->cinfo);
2856 nfs_post_op_update_inode(dir, res->dir_attr);
2860 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2862 struct nfs_server *server = NFS_SERVER(dir);
2863 struct nfs_renameargs *arg = msg->rpc_argp;
2864 struct nfs_renameres *res = msg->rpc_resp;
2866 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2867 arg->bitmask = server->attr_bitmask;
2868 res->server = server;
2869 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2872 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2874 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2875 &data->args.seq_args,
2879 rpc_call_start(task);
2882 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2883 struct inode *new_dir)
2885 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2887 if (!nfs4_sequence_done(task, &res->seq_res))
2889 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2892 update_changeattr(old_dir, &res->old_cinfo);
2893 nfs_post_op_update_inode(old_dir, res->old_fattr);
2894 update_changeattr(new_dir, &res->new_cinfo);
2895 nfs_post_op_update_inode(new_dir, res->new_fattr);
2899 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2900 struct inode *new_dir, struct qstr *new_name)
2902 struct nfs_server *server = NFS_SERVER(old_dir);
2903 struct nfs_renameargs arg = {
2904 .old_dir = NFS_FH(old_dir),
2905 .new_dir = NFS_FH(new_dir),
2906 .old_name = old_name,
2907 .new_name = new_name,
2908 .bitmask = server->attr_bitmask,
2910 struct nfs_renameres res = {
2913 struct rpc_message msg = {
2914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2918 int status = -ENOMEM;
2920 res.old_fattr = nfs_alloc_fattr();
2921 res.new_fattr = nfs_alloc_fattr();
2922 if (res.old_fattr == NULL || res.new_fattr == NULL)
2925 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2927 update_changeattr(old_dir, &res.old_cinfo);
2928 nfs_post_op_update_inode(old_dir, res.old_fattr);
2929 update_changeattr(new_dir, &res.new_cinfo);
2930 nfs_post_op_update_inode(new_dir, res.new_fattr);
2933 nfs_free_fattr(res.new_fattr);
2934 nfs_free_fattr(res.old_fattr);
2938 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2939 struct inode *new_dir, struct qstr *new_name)
2941 struct nfs4_exception exception = { };
2944 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2945 _nfs4_proc_rename(old_dir, old_name,
2948 } while (exception.retry);
2952 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2954 struct nfs_server *server = NFS_SERVER(inode);
2955 struct nfs4_link_arg arg = {
2956 .fh = NFS_FH(inode),
2957 .dir_fh = NFS_FH(dir),
2959 .bitmask = server->attr_bitmask,
2961 struct nfs4_link_res res = {
2964 struct rpc_message msg = {
2965 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2969 int status = -ENOMEM;
2971 res.fattr = nfs_alloc_fattr();
2972 res.dir_attr = nfs_alloc_fattr();
2973 if (res.fattr == NULL || res.dir_attr == NULL)
2976 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2978 update_changeattr(dir, &res.cinfo);
2979 nfs_post_op_update_inode(dir, res.dir_attr);
2980 nfs_post_op_update_inode(inode, res.fattr);
2983 nfs_free_fattr(res.dir_attr);
2984 nfs_free_fattr(res.fattr);
2988 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2990 struct nfs4_exception exception = { };
2993 err = nfs4_handle_exception(NFS_SERVER(inode),
2994 _nfs4_proc_link(inode, dir, name),
2996 } while (exception.retry);
3000 struct nfs4_createdata {
3001 struct rpc_message msg;
3002 struct nfs4_create_arg arg;
3003 struct nfs4_create_res res;
3005 struct nfs_fattr fattr;
3006 struct nfs_fattr dir_fattr;
3009 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3010 struct qstr *name, struct iattr *sattr, u32 ftype)
3012 struct nfs4_createdata *data;
3014 data = kzalloc(sizeof(*data), GFP_KERNEL);
3016 struct nfs_server *server = NFS_SERVER(dir);
3018 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3019 data->msg.rpc_argp = &data->arg;
3020 data->msg.rpc_resp = &data->res;
3021 data->arg.dir_fh = NFS_FH(dir);
3022 data->arg.server = server;
3023 data->arg.name = name;
3024 data->arg.attrs = sattr;
3025 data->arg.ftype = ftype;
3026 data->arg.bitmask = server->attr_bitmask;
3027 data->res.server = server;
3028 data->res.fh = &data->fh;
3029 data->res.fattr = &data->fattr;
3030 data->res.dir_fattr = &data->dir_fattr;
3031 nfs_fattr_init(data->res.fattr);
3032 nfs_fattr_init(data->res.dir_fattr);
3037 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3039 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3040 &data->arg.seq_args, &data->res.seq_res, 1);
3042 update_changeattr(dir, &data->res.dir_cinfo);
3043 nfs_post_op_update_inode(dir, data->res.dir_fattr);
3044 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3049 static void nfs4_free_createdata(struct nfs4_createdata *data)
3054 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3055 struct page *page, unsigned int len, struct iattr *sattr)
3057 struct nfs4_createdata *data;
3058 int status = -ENAMETOOLONG;
3060 if (len > NFS4_MAXPATHLEN)
3064 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3068 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3069 data->arg.u.symlink.pages = &page;
3070 data->arg.u.symlink.len = len;
3072 status = nfs4_do_create(dir, dentry, data);
3074 nfs4_free_createdata(data);
3079 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3080 struct page *page, unsigned int len, struct iattr *sattr)
3082 struct nfs4_exception exception = { };
3085 err = nfs4_handle_exception(NFS_SERVER(dir),
3086 _nfs4_proc_symlink(dir, dentry, page,
3089 } while (exception.retry);
3093 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3094 struct iattr *sattr)
3096 struct nfs4_createdata *data;
3097 int status = -ENOMEM;
3099 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3103 status = nfs4_do_create(dir, dentry, data);
3105 nfs4_free_createdata(data);
3110 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3111 struct iattr *sattr)
3113 struct nfs4_exception exception = { };
3116 sattr->ia_mode &= ~current_umask();
3118 err = nfs4_handle_exception(NFS_SERVER(dir),
3119 _nfs4_proc_mkdir(dir, dentry, sattr),
3121 } while (exception.retry);
3125 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3126 u64 cookie, struct page **pages, unsigned int count, int plus)
3128 struct inode *dir = dentry->d_inode;
3129 struct nfs4_readdir_arg args = {
3134 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3137 struct nfs4_readdir_res res;
3138 struct rpc_message msg = {
3139 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3146 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3147 dentry->d_parent->d_name.name,
3148 dentry->d_name.name,
3149 (unsigned long long)cookie);
3150 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3151 res.pgbase = args.pgbase;
3152 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3154 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3155 status += args.pgbase;
3158 nfs_invalidate_atime(dir);
3160 dprintk("%s: returns %d\n", __func__, status);
3164 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3165 u64 cookie, struct page **pages, unsigned int count, int plus)
3167 struct nfs4_exception exception = { };
3170 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3171 _nfs4_proc_readdir(dentry, cred, cookie,
3172 pages, count, plus),
3174 } while (exception.retry);
3178 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3179 struct iattr *sattr, dev_t rdev)
3181 struct nfs4_createdata *data;
3182 int mode = sattr->ia_mode;
3183 int status = -ENOMEM;
3185 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3186 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3188 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3193 data->arg.ftype = NF4FIFO;
3194 else if (S_ISBLK(mode)) {
3195 data->arg.ftype = NF4BLK;
3196 data->arg.u.device.specdata1 = MAJOR(rdev);
3197 data->arg.u.device.specdata2 = MINOR(rdev);
3199 else if (S_ISCHR(mode)) {
3200 data->arg.ftype = NF4CHR;
3201 data->arg.u.device.specdata1 = MAJOR(rdev);
3202 data->arg.u.device.specdata2 = MINOR(rdev);
3205 status = nfs4_do_create(dir, dentry, data);
3207 nfs4_free_createdata(data);
3212 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3213 struct iattr *sattr, dev_t rdev)
3215 struct nfs4_exception exception = { };
3218 sattr->ia_mode &= ~current_umask();
3220 err = nfs4_handle_exception(NFS_SERVER(dir),
3221 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3223 } while (exception.retry);
3227 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3228 struct nfs_fsstat *fsstat)
3230 struct nfs4_statfs_arg args = {
3232 .bitmask = server->attr_bitmask,
3234 struct nfs4_statfs_res res = {
3237 struct rpc_message msg = {
3238 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3243 nfs_fattr_init(fsstat->fattr);
3244 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3247 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3249 struct nfs4_exception exception = { };
3252 err = nfs4_handle_exception(server,
3253 _nfs4_proc_statfs(server, fhandle, fsstat),
3255 } while (exception.retry);
3259 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3260 struct nfs_fsinfo *fsinfo)
3262 struct nfs4_fsinfo_arg args = {
3264 .bitmask = server->attr_bitmask,
3266 struct nfs4_fsinfo_res res = {
3269 struct rpc_message msg = {
3270 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3275 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3278 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3280 struct nfs4_exception exception = { };
3284 err = nfs4_handle_exception(server,
3285 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3287 } while (exception.retry);
3291 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3293 nfs_fattr_init(fsinfo->fattr);
3294 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3297 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3298 struct nfs_pathconf *pathconf)
3300 struct nfs4_pathconf_arg args = {
3302 .bitmask = server->attr_bitmask,
3304 struct nfs4_pathconf_res res = {
3305 .pathconf = pathconf,
3307 struct rpc_message msg = {
3308 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3313 /* None of the pathconf attributes are mandatory to implement */
3314 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3315 memset(pathconf, 0, sizeof(*pathconf));
3319 nfs_fattr_init(pathconf->fattr);
3320 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3323 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3324 struct nfs_pathconf *pathconf)
3326 struct nfs4_exception exception = { };
3330 err = nfs4_handle_exception(server,
3331 _nfs4_proc_pathconf(server, fhandle, pathconf),
3333 } while (exception.retry);
3337 void __nfs4_read_done_cb(struct nfs_read_data *data)
3339 nfs_invalidate_atime(data->header->inode);
3342 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3344 struct nfs_server *server = NFS_SERVER(data->header->inode);
3346 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3347 rpc_restart_call_prepare(task);
3351 __nfs4_read_done_cb(data);
3352 if (task->tk_status > 0)
3353 renew_lease(server, data->timestamp);
3357 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3360 dprintk("--> %s\n", __func__);
3362 if (!nfs4_sequence_done(task, &data->res.seq_res))
3365 return data->read_done_cb ? data->read_done_cb(task, data) :
3366 nfs4_read_done_cb(task, data);
3369 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3371 data->timestamp = jiffies;
3372 data->read_done_cb = nfs4_read_done_cb;
3373 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3374 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3377 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3379 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3380 &data->args.seq_args,
3384 rpc_call_start(task);
3387 /* Reset the the nfs_read_data to send the read to the MDS. */
3388 void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3390 struct nfs_pgio_header *hdr = data->header;
3391 struct inode *inode = hdr->inode;
3393 dprintk("%s Reset task for i/o through\n", __func__);
3394 data->ds_clp = NULL;
3395 /* offsets will differ in the dense stripe case */
3396 data->args.offset = data->mds_offset;
3397 data->args.fh = NFS_FH(inode);
3398 data->read_done_cb = nfs4_read_done_cb;
3399 task->tk_ops = hdr->mds_ops;
3400 rpc_task_reset_client(task, NFS_CLIENT(inode));
3402 EXPORT_SYMBOL_GPL(nfs4_reset_read);
3404 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3406 struct inode *inode = data->header->inode;
3408 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3409 rpc_restart_call_prepare(task);
3412 if (task->tk_status >= 0) {
3413 renew_lease(NFS_SERVER(inode), data->timestamp);
3414 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3419 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3421 if (!nfs4_sequence_done(task, &data->res.seq_res))
3423 return data->write_done_cb ? data->write_done_cb(task, data) :
3424 nfs4_write_done_cb(task, data);
3427 /* Reset the the nfs_write_data to send the write to the MDS. */
3428 void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3430 struct nfs_pgio_header *hdr = data->header;
3431 struct inode *inode = hdr->inode;
3433 dprintk("%s Reset task for i/o through\n", __func__);
3434 data->ds_clp = NULL;
3435 data->write_done_cb = nfs4_write_done_cb;
3436 data->args.fh = NFS_FH(inode);
3437 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3438 data->args.offset = data->mds_offset;
3439 data->res.fattr = &data->fattr;
3440 task->tk_ops = hdr->mds_ops;
3441 rpc_task_reset_client(task, NFS_CLIENT(inode));
3443 EXPORT_SYMBOL_GPL(nfs4_reset_write);
3445 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3447 struct nfs_server *server = NFS_SERVER(data->header->inode);
3450 data->args.bitmask = NULL;
3451 data->res.fattr = NULL;
3453 data->args.bitmask = server->cache_consistency_bitmask;
3454 if (!data->write_done_cb)
3455 data->write_done_cb = nfs4_write_done_cb;
3456 data->res.server = server;
3457 data->timestamp = jiffies;
3459 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3460 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3463 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3465 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3466 &data->args.seq_args,
3470 rpc_call_start(task);
3473 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3475 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3476 &data->args.seq_args,
3480 rpc_call_start(task);
3483 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3485 struct inode *inode = data->inode;
3487 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3488 rpc_restart_call_prepare(task);
3491 nfs_refresh_inode(inode, data->res.fattr);
3495 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3497 if (!nfs4_sequence_done(task, &data->res.seq_res))
3499 return data->commit_done_cb(task, data);
3502 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3504 struct nfs_server *server = NFS_SERVER(data->inode);
3507 data->args.bitmask = NULL;
3508 data->res.fattr = NULL;
3510 data->args.bitmask = server->cache_consistency_bitmask;
3511 if (data->commit_done_cb == NULL)
3512 data->commit_done_cb = nfs4_commit_done_cb;
3513 data->res.server = server;
3514 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3515 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3518 struct nfs4_renewdata {
3519 struct nfs_client *client;
3520 unsigned long timestamp;
3524 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3525 * standalone procedure for queueing an asynchronous RENEW.
3527 static void nfs4_renew_release(void *calldata)
3529 struct nfs4_renewdata *data = calldata;
3530 struct nfs_client *clp = data->client;
3532 if (atomic_read(&clp->cl_count) > 1)
3533 nfs4_schedule_state_renewal(clp);
3534 nfs_put_client(clp);
3538 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3540 struct nfs4_renewdata *data = calldata;
3541 struct nfs_client *clp = data->client;
3542 unsigned long timestamp = data->timestamp;
3544 if (task->tk_status < 0) {
3545 /* Unless we're shutting down, schedule state recovery! */
3546 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3548 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3549 nfs4_schedule_lease_recovery(clp);
3552 nfs4_schedule_path_down_recovery(clp);
3554 do_renew_lease(clp, timestamp);
3557 static const struct rpc_call_ops nfs4_renew_ops = {
3558 .rpc_call_done = nfs4_renew_done,
3559 .rpc_release = nfs4_renew_release,
3562 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3564 struct rpc_message msg = {
3565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3569 struct nfs4_renewdata *data;
3571 if (renew_flags == 0)
3573 if (!atomic_inc_not_zero(&clp->cl_count))
3575 data = kmalloc(sizeof(*data), GFP_NOFS);
3579 data->timestamp = jiffies;
3580 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3581 &nfs4_renew_ops, data);
3584 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3586 struct rpc_message msg = {
3587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3591 unsigned long now = jiffies;
3594 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3597 do_renew_lease(clp, now);
3601 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3603 return (server->caps & NFS_CAP_ACLS)
3604 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3605 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3608 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3609 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3612 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3614 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3615 struct page **pages, unsigned int *pgbase)
3617 struct page *newpage, **spages;
3623 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3624 newpage = alloc_page(GFP_KERNEL);
3626 if (newpage == NULL)
3628 memcpy(page_address(newpage), buf, len);
3633 } while (buflen != 0);
3639 __free_page(spages[rc-1]);
3643 struct nfs4_cached_acl {
3649 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3651 struct nfs_inode *nfsi = NFS_I(inode);
3653 spin_lock(&inode->i_lock);
3654 kfree(nfsi->nfs4_acl);
3655 nfsi->nfs4_acl = acl;
3656 spin_unlock(&inode->i_lock);
3659 static void nfs4_zap_acl_attr(struct inode *inode)
3661 nfs4_set_cached_acl(inode, NULL);
3664 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3666 struct nfs_inode *nfsi = NFS_I(inode);
3667 struct nfs4_cached_acl *acl;
3670 spin_lock(&inode->i_lock);
3671 acl = nfsi->nfs4_acl;
3674 if (buf == NULL) /* user is just asking for length */
3676 if (acl->cached == 0)
3678 ret = -ERANGE; /* see getxattr(2) man page */
3679 if (acl->len > buflen)
3681 memcpy(buf, acl->data, acl->len);
3685 spin_unlock(&inode->i_lock);
3689 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3691 struct nfs4_cached_acl *acl;
3693 if (pages && acl_len <= PAGE_SIZE) {
3694 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3698 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3700 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3707 nfs4_set_cached_acl(inode, acl);
3711 * The getxattr API returns the required buffer length when called with a
3712 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3713 * the required buf. On a NULL buf, we send a page of data to the server
3714 * guessing that the ACL request can be serviced by a page. If so, we cache
3715 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3716 * the cache. If not so, we throw away the page, and cache the required
3717 * length. The next getxattr call will then produce another round trip to
3718 * the server, this time with the input buf of the required size.
3720 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3722 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3723 struct nfs_getaclargs args = {
3724 .fh = NFS_FH(inode),
3728 struct nfs_getaclres res = {
3731 struct rpc_message msg = {
3732 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3736 int ret = -ENOMEM, npages, i, acl_len = 0;
3738 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3739 /* As long as we're doing a round trip to the server anyway,
3740 * let's be prepared for a page of acl data. */
3744 /* Add an extra page to handle the bitmap returned */
3747 for (i = 0; i < npages; i++) {
3748 pages[i] = alloc_page(GFP_KERNEL);
3753 /* for decoding across pages */
3754 res.acl_scratch = alloc_page(GFP_KERNEL);
3755 if (!res.acl_scratch)
3758 args.acl_len = npages * PAGE_SIZE;
3759 args.acl_pgbase = 0;
3761 /* Let decode_getfacl know not to fail if the ACL data is larger than
3762 * the page we send as a guess */
3764 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3766 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3767 __func__, buf, buflen, npages, args.acl_len);
3768 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3769 &msg, &args.seq_args, &res.seq_res, 0);
3773 acl_len = res.acl_len - res.acl_data_offset;
3774 if (acl_len > args.acl_len)
3775 nfs4_write_cached_acl(inode, NULL, 0, acl_len);
3777 nfs4_write_cached_acl(inode, pages, res.acl_data_offset,
3781 if (acl_len > buflen)
3783 _copy_from_pages(buf, pages, res.acl_data_offset,
3788 for (i = 0; i < npages; i++)
3790 __free_page(pages[i]);
3791 if (res.acl_scratch)
3792 __free_page(res.acl_scratch);
3796 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3798 struct nfs4_exception exception = { };
3801 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3804 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3805 } while (exception.retry);
3809 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3811 struct nfs_server *server = NFS_SERVER(inode);
3814 if (!nfs4_server_supports_acls(server))
3816 ret = nfs_revalidate_inode(server, inode);
3819 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3820 nfs_zap_acl_cache(inode);
3821 ret = nfs4_read_cached_acl(inode, buf, buflen);
3823 /* -ENOENT is returned if there is no ACL or if there is an ACL
3824 * but no cached acl data, just the acl length */
3826 return nfs4_get_acl_uncached(inode, buf, buflen);
3829 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3831 struct nfs_server *server = NFS_SERVER(inode);
3832 struct page *pages[NFS4ACL_MAXPAGES];
3833 struct nfs_setaclargs arg = {
3834 .fh = NFS_FH(inode),
3838 struct nfs_setaclres res;
3839 struct rpc_message msg = {
3840 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3846 if (!nfs4_server_supports_acls(server))
3848 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3851 nfs_inode_return_delegation(inode);
3852 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3855 * Free each page after tx, so the only ref left is
3856 * held by the network stack
3859 put_page(pages[i-1]);
3862 * Acl update can result in inode attribute update.
3863 * so mark the attribute cache invalid.
3865 spin_lock(&inode->i_lock);
3866 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3867 spin_unlock(&inode->i_lock);
3868 nfs_access_zap_cache(inode);
3869 nfs_zap_acl_cache(inode);
3873 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3875 struct nfs4_exception exception = { };
3878 err = nfs4_handle_exception(NFS_SERVER(inode),
3879 __nfs4_proc_set_acl(inode, buf, buflen),
3881 } while (exception.retry);
3886 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3888 struct nfs_client *clp = server->nfs_client;
3890 if (task->tk_status >= 0)
3892 switch(task->tk_status) {
3893 case -NFS4ERR_DELEG_REVOKED:
3894 case -NFS4ERR_ADMIN_REVOKED:
3895 case -NFS4ERR_BAD_STATEID:
3898 nfs_remove_bad_delegation(state->inode);
3899 case -NFS4ERR_OPENMODE:
3902 nfs4_schedule_stateid_recovery(server, state);
3903 goto wait_on_recovery;
3904 case -NFS4ERR_EXPIRED:
3906 nfs4_schedule_stateid_recovery(server, state);
3907 case -NFS4ERR_STALE_STATEID:
3908 case -NFS4ERR_STALE_CLIENTID:
3909 nfs4_schedule_lease_recovery(clp);
3910 goto wait_on_recovery;
3911 #if defined(CONFIG_NFS_V4_1)
3912 case -NFS4ERR_BADSESSION:
3913 case -NFS4ERR_BADSLOT:
3914 case -NFS4ERR_BAD_HIGH_SLOT:
3915 case -NFS4ERR_DEADSESSION:
3916 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3917 case -NFS4ERR_SEQ_FALSE_RETRY:
3918 case -NFS4ERR_SEQ_MISORDERED:
3919 dprintk("%s ERROR %d, Reset session\n", __func__,
3921 nfs4_schedule_session_recovery(clp->cl_session);
3922 task->tk_status = 0;
3924 #endif /* CONFIG_NFS_V4_1 */
3925 case -NFS4ERR_DELAY:
3926 nfs_inc_server_stats(server, NFSIOS_DELAY);
3927 case -NFS4ERR_GRACE:
3929 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3930 task->tk_status = 0;
3932 case -NFS4ERR_RETRY_UNCACHED_REP:
3933 case -NFS4ERR_OLD_STATEID:
3934 task->tk_status = 0;
3937 task->tk_status = nfs4_map_errors(task->tk_status);
3940 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3941 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3942 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3943 task->tk_status = 0;
3947 static void nfs4_construct_boot_verifier(struct nfs_client *clp,
3948 nfs4_verifier *bootverf)
3952 verf[0] = htonl((u32)clp->cl_boot_time.tv_sec);
3953 verf[1] = htonl((u32)clp->cl_boot_time.tv_nsec);
3954 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3957 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3958 unsigned short port, struct rpc_cred *cred,
3959 struct nfs4_setclientid_res *res)
3961 nfs4_verifier sc_verifier;
3962 struct nfs4_setclientid setclientid = {
3963 .sc_verifier = &sc_verifier,
3965 .sc_cb_ident = clp->cl_cb_ident,
3967 struct rpc_message msg = {
3968 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3969 .rpc_argp = &setclientid,
3976 nfs4_construct_boot_verifier(clp, &sc_verifier);
3980 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3981 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3983 rpc_peeraddr2str(clp->cl_rpcclient,
3985 rpc_peeraddr2str(clp->cl_rpcclient,
3987 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3988 clp->cl_id_uniquifier);
3989 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3990 sizeof(setclientid.sc_netid),
3991 rpc_peeraddr2str(clp->cl_rpcclient,
3992 RPC_DISPLAY_NETID));
3993 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3994 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3995 clp->cl_ipaddr, port >> 8, port & 255);
3998 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3999 if (status != -NFS4ERR_CLID_INUSE)
4002 ++clp->cl_id_uniquifier;
4006 ssleep(clp->cl_lease_time / HZ + 1);
4011 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4012 struct nfs4_setclientid_res *arg,
4013 struct rpc_cred *cred)
4015 struct nfs_fsinfo fsinfo;
4016 struct rpc_message msg = {
4017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4019 .rpc_resp = &fsinfo,
4026 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4028 spin_lock(&clp->cl_lock);
4029 clp->cl_lease_time = fsinfo.lease_time * HZ;
4030 clp->cl_last_renewal = now;
4031 spin_unlock(&clp->cl_lock);
4036 struct nfs4_delegreturndata {
4037 struct nfs4_delegreturnargs args;
4038 struct nfs4_delegreturnres res;
4040 nfs4_stateid stateid;
4041 unsigned long timestamp;
4042 struct nfs_fattr fattr;
4046 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4048 struct nfs4_delegreturndata *data = calldata;
4050 if (!nfs4_sequence_done(task, &data->res.seq_res))
4053 switch (task->tk_status) {
4054 case -NFS4ERR_STALE_STATEID:
4055 case -NFS4ERR_EXPIRED:
4057 renew_lease(data->res.server, data->timestamp);
4060 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4062 rpc_restart_call_prepare(task);
4066 data->rpc_status = task->tk_status;
4069 static void nfs4_delegreturn_release(void *calldata)
4074 #if defined(CONFIG_NFS_V4_1)
4075 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4077 struct nfs4_delegreturndata *d_data;
4079 d_data = (struct nfs4_delegreturndata *)data;
4081 if (nfs4_setup_sequence(d_data->res.server,
4082 &d_data->args.seq_args,
4083 &d_data->res.seq_res, task))
4085 rpc_call_start(task);
4087 #endif /* CONFIG_NFS_V4_1 */
4089 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4090 #if defined(CONFIG_NFS_V4_1)
4091 .rpc_call_prepare = nfs4_delegreturn_prepare,
4092 #endif /* CONFIG_NFS_V4_1 */
4093 .rpc_call_done = nfs4_delegreturn_done,
4094 .rpc_release = nfs4_delegreturn_release,
4097 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4099 struct nfs4_delegreturndata *data;
4100 struct nfs_server *server = NFS_SERVER(inode);
4101 struct rpc_task *task;
4102 struct rpc_message msg = {
4103 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4106 struct rpc_task_setup task_setup_data = {
4107 .rpc_client = server->client,
4108 .rpc_message = &msg,
4109 .callback_ops = &nfs4_delegreturn_ops,
4110 .flags = RPC_TASK_ASYNC,
4114 data = kzalloc(sizeof(*data), GFP_NOFS);
4117 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4118 data->args.fhandle = &data->fh;
4119 data->args.stateid = &data->stateid;
4120 data->args.bitmask = server->attr_bitmask;
4121 nfs_copy_fh(&data->fh, NFS_FH(inode));
4122 nfs4_stateid_copy(&data->stateid, stateid);
4123 data->res.fattr = &data->fattr;
4124 data->res.server = server;
4125 nfs_fattr_init(data->res.fattr);
4126 data->timestamp = jiffies;
4127 data->rpc_status = 0;
4129 task_setup_data.callback_data = data;
4130 msg.rpc_argp = &data->args;
4131 msg.rpc_resp = &data->res;
4132 task = rpc_run_task(&task_setup_data);
4134 return PTR_ERR(task);
4137 status = nfs4_wait_for_completion_rpc_task(task);
4140 status = data->rpc_status;
4143 nfs_refresh_inode(inode, &data->fattr);
4149 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4151 struct nfs_server *server = NFS_SERVER(inode);
4152 struct nfs4_exception exception = { };
4155 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4157 case -NFS4ERR_STALE_STATEID:
4158 case -NFS4ERR_EXPIRED:
4162 err = nfs4_handle_exception(server, err, &exception);
4163 } while (exception.retry);
4167 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4168 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4171 * sleep, with exponential backoff, and retry the LOCK operation.
4173 static unsigned long
4174 nfs4_set_lock_task_retry(unsigned long timeout)
4176 freezable_schedule_timeout_killable(timeout);
4178 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4179 return NFS4_LOCK_MAXTIMEOUT;
4183 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4185 struct inode *inode = state->inode;
4186 struct nfs_server *server = NFS_SERVER(inode);
4187 struct nfs_client *clp = server->nfs_client;
4188 struct nfs_lockt_args arg = {
4189 .fh = NFS_FH(inode),
4192 struct nfs_lockt_res res = {
4195 struct rpc_message msg = {
4196 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4199 .rpc_cred = state->owner->so_cred,
4201 struct nfs4_lock_state *lsp;
4204 arg.lock_owner.clientid = clp->cl_clientid;
4205 status = nfs4_set_lock_state(state, request);
4208 lsp = request->fl_u.nfs4_fl.owner;
4209 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4210 arg.lock_owner.s_dev = server->s_dev;
4211 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4214 request->fl_type = F_UNLCK;
4216 case -NFS4ERR_DENIED:
4219 request->fl_ops->fl_release_private(request);
4224 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4226 struct nfs4_exception exception = { };
4230 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4231 _nfs4_proc_getlk(state, cmd, request),
4233 } while (exception.retry);
4237 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4240 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4242 res = posix_lock_file_wait(file, fl);
4245 res = flock_lock_file_wait(file, fl);
4253 struct nfs4_unlockdata {
4254 struct nfs_locku_args arg;
4255 struct nfs_locku_res res;
4256 struct nfs4_lock_state *lsp;
4257 struct nfs_open_context *ctx;
4258 struct file_lock fl;
4259 const struct nfs_server *server;
4260 unsigned long timestamp;
4263 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4264 struct nfs_open_context *ctx,
4265 struct nfs4_lock_state *lsp,
4266 struct nfs_seqid *seqid)
4268 struct nfs4_unlockdata *p;
4269 struct inode *inode = lsp->ls_state->inode;
4271 p = kzalloc(sizeof(*p), GFP_NOFS);
4274 p->arg.fh = NFS_FH(inode);
4276 p->arg.seqid = seqid;
4277 p->res.seqid = seqid;
4278 p->arg.stateid = &lsp->ls_stateid;
4280 atomic_inc(&lsp->ls_count);
4281 /* Ensure we don't close file until we're done freeing locks! */
4282 p->ctx = get_nfs_open_context(ctx);
4283 memcpy(&p->fl, fl, sizeof(p->fl));
4284 p->server = NFS_SERVER(inode);
4288 static void nfs4_locku_release_calldata(void *data)
4290 struct nfs4_unlockdata *calldata = data;
4291 nfs_free_seqid(calldata->arg.seqid);
4292 nfs4_put_lock_state(calldata->lsp);
4293 put_nfs_open_context(calldata->ctx);
4297 static void nfs4_locku_done(struct rpc_task *task, void *data)
4299 struct nfs4_unlockdata *calldata = data;
4301 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4303 switch (task->tk_status) {
4305 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4306 &calldata->res.stateid);
4307 renew_lease(calldata->server, calldata->timestamp);
4309 case -NFS4ERR_BAD_STATEID:
4310 case -NFS4ERR_OLD_STATEID:
4311 case -NFS4ERR_STALE_STATEID:
4312 case -NFS4ERR_EXPIRED:
4315 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4316 rpc_restart_call_prepare(task);
4320 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4322 struct nfs4_unlockdata *calldata = data;
4324 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4326 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4327 /* Note: exit _without_ running nfs4_locku_done */
4328 task->tk_action = NULL;
4331 calldata->timestamp = jiffies;
4332 if (nfs4_setup_sequence(calldata->server,
4333 &calldata->arg.seq_args,
4334 &calldata->res.seq_res, task))
4336 rpc_call_start(task);
4339 static const struct rpc_call_ops nfs4_locku_ops = {
4340 .rpc_call_prepare = nfs4_locku_prepare,
4341 .rpc_call_done = nfs4_locku_done,
4342 .rpc_release = nfs4_locku_release_calldata,
4345 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4346 struct nfs_open_context *ctx,
4347 struct nfs4_lock_state *lsp,
4348 struct nfs_seqid *seqid)
4350 struct nfs4_unlockdata *data;
4351 struct rpc_message msg = {
4352 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4353 .rpc_cred = ctx->cred,
4355 struct rpc_task_setup task_setup_data = {
4356 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4357 .rpc_message = &msg,
4358 .callback_ops = &nfs4_locku_ops,
4359 .workqueue = nfsiod_workqueue,
4360 .flags = RPC_TASK_ASYNC,
4363 /* Ensure this is an unlock - when canceling a lock, the
4364 * canceled lock is passed in, and it won't be an unlock.
4366 fl->fl_type = F_UNLCK;
4368 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4370 nfs_free_seqid(seqid);
4371 return ERR_PTR(-ENOMEM);
4374 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4375 msg.rpc_argp = &data->arg;
4376 msg.rpc_resp = &data->res;
4377 task_setup_data.callback_data = data;
4378 return rpc_run_task(&task_setup_data);
4381 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4383 struct nfs_inode *nfsi = NFS_I(state->inode);
4384 struct nfs_seqid *seqid;
4385 struct nfs4_lock_state *lsp;
4386 struct rpc_task *task;
4388 unsigned char fl_flags = request->fl_flags;
4390 status = nfs4_set_lock_state(state, request);
4391 /* Unlock _before_ we do the RPC call */
4392 request->fl_flags |= FL_EXISTS;
4393 down_read(&nfsi->rwsem);
4394 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4395 up_read(&nfsi->rwsem);
4398 up_read(&nfsi->rwsem);
4401 /* Is this a delegated lock? */
4402 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4404 lsp = request->fl_u.nfs4_fl.owner;
4405 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4409 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4410 status = PTR_ERR(task);
4413 status = nfs4_wait_for_completion_rpc_task(task);
4416 request->fl_flags = fl_flags;
4420 struct nfs4_lockdata {
4421 struct nfs_lock_args arg;
4422 struct nfs_lock_res res;
4423 struct nfs4_lock_state *lsp;
4424 struct nfs_open_context *ctx;
4425 struct file_lock fl;
4426 unsigned long timestamp;
4429 struct nfs_server *server;
4432 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4433 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4436 struct nfs4_lockdata *p;
4437 struct inode *inode = lsp->ls_state->inode;
4438 struct nfs_server *server = NFS_SERVER(inode);
4440 p = kzalloc(sizeof(*p), gfp_mask);
4444 p->arg.fh = NFS_FH(inode);
4446 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4447 if (p->arg.open_seqid == NULL)
4449 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4450 if (p->arg.lock_seqid == NULL)
4451 goto out_free_seqid;
4452 p->arg.lock_stateid = &lsp->ls_stateid;
4453 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4454 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4455 p->arg.lock_owner.s_dev = server->s_dev;
4456 p->res.lock_seqid = p->arg.lock_seqid;
4459 atomic_inc(&lsp->ls_count);
4460 p->ctx = get_nfs_open_context(ctx);
4461 memcpy(&p->fl, fl, sizeof(p->fl));
4464 nfs_free_seqid(p->arg.open_seqid);
4470 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4472 struct nfs4_lockdata *data = calldata;
4473 struct nfs4_state *state = data->lsp->ls_state;
4475 dprintk("%s: begin!\n", __func__);
4476 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4478 /* Do we need to do an open_to_lock_owner? */
4479 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4480 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4482 data->arg.open_stateid = &state->stateid;
4483 data->arg.new_lock_owner = 1;
4484 data->res.open_seqid = data->arg.open_seqid;
4486 data->arg.new_lock_owner = 0;
4487 data->timestamp = jiffies;
4488 if (nfs4_setup_sequence(data->server,
4489 &data->arg.seq_args,
4490 &data->res.seq_res, task))
4492 rpc_call_start(task);
4493 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4496 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4498 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4499 nfs4_lock_prepare(task, calldata);
4502 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4504 struct nfs4_lockdata *data = calldata;
4506 dprintk("%s: begin!\n", __func__);
4508 if (!nfs4_sequence_done(task, &data->res.seq_res))
4511 data->rpc_status = task->tk_status;
4512 if (data->arg.new_lock_owner != 0) {
4513 if (data->rpc_status == 0)
4514 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4518 if (data->rpc_status == 0) {
4519 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4520 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4521 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4524 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4527 static void nfs4_lock_release(void *calldata)
4529 struct nfs4_lockdata *data = calldata;
4531 dprintk("%s: begin!\n", __func__);
4532 nfs_free_seqid(data->arg.open_seqid);
4533 if (data->cancelled != 0) {
4534 struct rpc_task *task;
4535 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4536 data->arg.lock_seqid);
4538 rpc_put_task_async(task);
4539 dprintk("%s: cancelling lock!\n", __func__);
4541 nfs_free_seqid(data->arg.lock_seqid);
4542 nfs4_put_lock_state(data->lsp);
4543 put_nfs_open_context(data->ctx);
4545 dprintk("%s: done!\n", __func__);
4548 static const struct rpc_call_ops nfs4_lock_ops = {
4549 .rpc_call_prepare = nfs4_lock_prepare,
4550 .rpc_call_done = nfs4_lock_done,
4551 .rpc_release = nfs4_lock_release,
4554 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4555 .rpc_call_prepare = nfs4_recover_lock_prepare,
4556 .rpc_call_done = nfs4_lock_done,
4557 .rpc_release = nfs4_lock_release,
4560 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4563 case -NFS4ERR_ADMIN_REVOKED:
4564 case -NFS4ERR_BAD_STATEID:
4565 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4566 if (new_lock_owner != 0 ||
4567 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4568 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4570 case -NFS4ERR_STALE_STATEID:
4571 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4572 case -NFS4ERR_EXPIRED:
4573 nfs4_schedule_lease_recovery(server->nfs_client);
4577 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4579 struct nfs4_lockdata *data;
4580 struct rpc_task *task;
4581 struct rpc_message msg = {
4582 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4583 .rpc_cred = state->owner->so_cred,
4585 struct rpc_task_setup task_setup_data = {
4586 .rpc_client = NFS_CLIENT(state->inode),
4587 .rpc_message = &msg,
4588 .callback_ops = &nfs4_lock_ops,
4589 .workqueue = nfsiod_workqueue,
4590 .flags = RPC_TASK_ASYNC,
4594 dprintk("%s: begin!\n", __func__);
4595 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4596 fl->fl_u.nfs4_fl.owner,
4597 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4601 data->arg.block = 1;
4602 if (recovery_type > NFS_LOCK_NEW) {
4603 if (recovery_type == NFS_LOCK_RECLAIM)
4604 data->arg.reclaim = NFS_LOCK_RECLAIM;
4605 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4607 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4608 msg.rpc_argp = &data->arg;
4609 msg.rpc_resp = &data->res;
4610 task_setup_data.callback_data = data;
4611 task = rpc_run_task(&task_setup_data);
4613 return PTR_ERR(task);
4614 ret = nfs4_wait_for_completion_rpc_task(task);
4616 ret = data->rpc_status;
4618 nfs4_handle_setlk_error(data->server, data->lsp,
4619 data->arg.new_lock_owner, ret);
4621 data->cancelled = 1;
4623 dprintk("%s: done, ret = %d!\n", __func__, ret);
4627 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4629 struct nfs_server *server = NFS_SERVER(state->inode);
4630 struct nfs4_exception exception = {
4631 .inode = state->inode,
4636 /* Cache the lock if possible... */
4637 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4639 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4640 if (err != -NFS4ERR_DELAY)
4642 nfs4_handle_exception(server, err, &exception);
4643 } while (exception.retry);
4647 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4649 struct nfs_server *server = NFS_SERVER(state->inode);
4650 struct nfs4_exception exception = {
4651 .inode = state->inode,
4655 err = nfs4_set_lock_state(state, request);
4659 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4661 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4665 case -NFS4ERR_GRACE:
4666 case -NFS4ERR_DELAY:
4667 nfs4_handle_exception(server, err, &exception);
4670 } while (exception.retry);
4675 #if defined(CONFIG_NFS_V4_1)
4676 static int nfs41_check_expired_locks(struct nfs4_state *state)
4678 int status, ret = NFS_OK;
4679 struct nfs4_lock_state *lsp;
4680 struct nfs_server *server = NFS_SERVER(state->inode);
4682 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4683 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4684 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4685 if (status != NFS_OK) {
4686 nfs41_free_stateid(server, &lsp->ls_stateid);
4687 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4696 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4698 int status = NFS_OK;
4700 if (test_bit(LK_STATE_IN_USE, &state->flags))
4701 status = nfs41_check_expired_locks(state);
4702 if (status == NFS_OK)
4704 return nfs4_lock_expired(state, request);
4708 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4710 struct nfs_inode *nfsi = NFS_I(state->inode);
4711 unsigned char fl_flags = request->fl_flags;
4712 int status = -ENOLCK;
4714 if ((fl_flags & FL_POSIX) &&
4715 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4717 /* Is this a delegated open? */
4718 status = nfs4_set_lock_state(state, request);
4721 request->fl_flags |= FL_ACCESS;
4722 status = do_vfs_lock(request->fl_file, request);
4725 down_read(&nfsi->rwsem);
4726 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4727 /* Yes: cache locks! */
4728 /* ...but avoid races with delegation recall... */
4729 request->fl_flags = fl_flags & ~FL_SLEEP;
4730 status = do_vfs_lock(request->fl_file, request);
4733 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4736 /* Note: we always want to sleep here! */
4737 request->fl_flags = fl_flags | FL_SLEEP;
4738 if (do_vfs_lock(request->fl_file, request) < 0)
4739 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4740 "manager!\n", __func__);
4742 up_read(&nfsi->rwsem);
4744 request->fl_flags = fl_flags;
4748 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4750 struct nfs4_exception exception = {
4752 .inode = state->inode,
4757 err = _nfs4_proc_setlk(state, cmd, request);
4758 if (err == -NFS4ERR_DENIED)
4760 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4762 } while (exception.retry);
4767 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4769 struct nfs_open_context *ctx;
4770 struct nfs4_state *state;
4771 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4774 /* verify open state */
4775 ctx = nfs_file_open_context(filp);
4778 if (request->fl_start < 0 || request->fl_end < 0)
4781 if (IS_GETLK(cmd)) {
4783 return nfs4_proc_getlk(state, F_GETLK, request);
4787 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4790 if (request->fl_type == F_UNLCK) {
4792 return nfs4_proc_unlck(state, cmd, request);
4799 * Don't rely on the VFS having checked the file open mode,
4800 * since it won't do this for flock() locks.
4802 switch (request->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) {
4804 if (!(filp->f_mode & FMODE_READ))
4808 if (!(filp->f_mode & FMODE_WRITE))
4813 status = nfs4_proc_setlk(state, cmd, request);
4814 if ((status != -EAGAIN) || IS_SETLK(cmd))
4816 timeout = nfs4_set_lock_task_retry(timeout);
4817 status = -ERESTARTSYS;
4820 } while(status < 0);
4824 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4826 struct nfs_server *server = NFS_SERVER(state->inode);
4827 struct nfs4_exception exception = { };
4830 err = nfs4_set_lock_state(state, fl);
4834 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4837 printk(KERN_ERR "NFS: %s: unhandled error "
4838 "%d.\n", __func__, err);
4842 case -NFS4ERR_EXPIRED:
4843 nfs4_schedule_stateid_recovery(server, state);
4844 case -NFS4ERR_STALE_CLIENTID:
4845 case -NFS4ERR_STALE_STATEID:
4846 nfs4_schedule_lease_recovery(server->nfs_client);
4848 case -NFS4ERR_BADSESSION:
4849 case -NFS4ERR_BADSLOT:
4850 case -NFS4ERR_BAD_HIGH_SLOT:
4851 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4852 case -NFS4ERR_DEADSESSION:
4853 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4857 * The show must go on: exit, but mark the
4858 * stateid as needing recovery.
4860 case -NFS4ERR_DELEG_REVOKED:
4861 case -NFS4ERR_ADMIN_REVOKED:
4862 case -NFS4ERR_BAD_STATEID:
4863 case -NFS4ERR_OPENMODE:
4864 nfs4_schedule_stateid_recovery(server, state);
4869 * User RPCSEC_GSS context has expired.
4870 * We cannot recover this stateid now, so
4871 * skip it and allow recovery thread to
4877 case -NFS4ERR_DENIED:
4878 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4881 case -NFS4ERR_DELAY:
4884 err = nfs4_handle_exception(server, err, &exception);
4885 } while (exception.retry);
4890 struct nfs_release_lockowner_data {
4891 struct nfs4_lock_state *lsp;
4892 struct nfs_server *server;
4893 struct nfs_release_lockowner_args args;
4896 static void nfs4_release_lockowner_release(void *calldata)
4898 struct nfs_release_lockowner_data *data = calldata;
4899 nfs4_free_lock_state(data->server, data->lsp);
4903 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
4904 .rpc_release = nfs4_release_lockowner_release,
4907 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
4909 struct nfs_server *server = lsp->ls_state->owner->so_server;
4910 struct nfs_release_lockowner_data *data;
4911 struct rpc_message msg = {
4912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4915 if (server->nfs_client->cl_mvops->minor_version != 0)
4917 data = kmalloc(sizeof(*data), GFP_NOFS);
4921 data->server = server;
4922 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4923 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4924 data->args.lock_owner.s_dev = server->s_dev;
4925 msg.rpc_argp = &data->args;
4926 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4930 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4932 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4933 const void *buf, size_t buflen,
4934 int flags, int type)
4936 if (strcmp(key, "") != 0)
4939 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4942 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4943 void *buf, size_t buflen, int type)
4945 if (strcmp(key, "") != 0)
4948 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4951 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4952 size_t list_len, const char *name,
4953 size_t name_len, int type)
4955 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4957 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4960 if (list && len <= list_len)
4961 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4966 * nfs_fhget will use either the mounted_on_fileid or the fileid
4968 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4970 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4971 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4972 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4973 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
4976 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4977 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
4978 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4982 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
4983 const struct qstr *name,
4984 struct nfs4_fs_locations *fs_locations,
4987 struct nfs_server *server = NFS_SERVER(dir);
4989 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4991 struct nfs4_fs_locations_arg args = {
4992 .dir_fh = NFS_FH(dir),
4997 struct nfs4_fs_locations_res res = {
4998 .fs_locations = fs_locations,
5000 struct rpc_message msg = {
5001 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5007 dprintk("%s: start\n", __func__);
5009 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5010 * is not supported */
5011 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5012 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5014 bitmask[0] |= FATTR4_WORD0_FILEID;
5016 nfs_fattr_init(&fs_locations->fattr);
5017 fs_locations->server = server;
5018 fs_locations->nlocations = 0;
5019 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5020 dprintk("%s: returned status = %d\n", __func__, status);
5024 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5025 const struct qstr *name,
5026 struct nfs4_fs_locations *fs_locations,
5029 struct nfs4_exception exception = { };
5032 err = nfs4_handle_exception(NFS_SERVER(dir),
5033 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5035 } while (exception.retry);
5039 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5042 struct nfs4_secinfo_arg args = {
5043 .dir_fh = NFS_FH(dir),
5046 struct nfs4_secinfo_res res = {
5049 struct rpc_message msg = {
5050 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5055 dprintk("NFS call secinfo %s\n", name->name);
5056 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5057 dprintk("NFS reply secinfo: %d\n", status);
5061 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5062 struct nfs4_secinfo_flavors *flavors)
5064 struct nfs4_exception exception = { };
5067 err = nfs4_handle_exception(NFS_SERVER(dir),
5068 _nfs4_proc_secinfo(dir, name, flavors),
5070 } while (exception.retry);
5074 #ifdef CONFIG_NFS_V4_1
5076 * Check the exchange flags returned by the server for invalid flags, having
5077 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5080 static int nfs4_check_cl_exchange_flags(u32 flags)
5082 if (flags & ~EXCHGID4_FLAG_MASK_R)
5084 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5085 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5087 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5091 return -NFS4ERR_INVAL;
5095 nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
5097 if (a->server_scope_sz == b->server_scope_sz &&
5098 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5105 * nfs4_proc_exchange_id()
5107 * Since the clientid has expired, all compounds using sessions
5108 * associated with the stale clientid will be returning
5109 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5110 * be in some phase of session reset.
5112 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5114 nfs4_verifier verifier;
5115 struct nfs41_exchange_id_args args = {
5116 .verifier = &verifier,
5118 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5120 struct nfs41_exchange_id_res res = {
5124 struct rpc_message msg = {
5125 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5131 dprintk("--> %s\n", __func__);
5132 BUG_ON(clp == NULL);
5134 nfs4_construct_boot_verifier(clp, &verifier);
5136 args.id_len = scnprintf(args.id, sizeof(args.id),
5139 init_utsname()->nodename,
5140 init_utsname()->domainname,
5141 clp->cl_rpcclient->cl_auth->au_flavor);
5143 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
5144 if (unlikely(!res.server_scope)) {
5149 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_KERNEL);
5150 if (unlikely(!res.impl_id)) {
5152 goto out_server_scope;
5155 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5157 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
5160 /* use the most recent implementation id */
5161 kfree(clp->impl_id);
5162 clp->impl_id = res.impl_id;
5167 if (clp->server_scope &&
5168 !nfs41_same_server_scope(clp->server_scope,
5169 res.server_scope)) {
5170 dprintk("%s: server_scope mismatch detected\n",
5172 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5173 kfree(clp->server_scope);
5174 clp->server_scope = NULL;
5177 if (!clp->server_scope) {
5178 clp->server_scope = res.server_scope;
5184 kfree(res.server_scope);
5187 dprintk("%s: Server Implementation ID: "
5188 "domain: %s, name: %s, date: %llu,%u\n",
5189 __func__, clp->impl_id->domain, clp->impl_id->name,
5190 clp->impl_id->date.seconds,
5191 clp->impl_id->date.nseconds);
5192 dprintk("<-- %s status= %d\n", __func__, status);
5196 struct nfs4_get_lease_time_data {
5197 struct nfs4_get_lease_time_args *args;
5198 struct nfs4_get_lease_time_res *res;
5199 struct nfs_client *clp;
5202 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5206 struct nfs4_get_lease_time_data *data =
5207 (struct nfs4_get_lease_time_data *)calldata;
5209 dprintk("--> %s\n", __func__);
5210 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5211 /* just setup sequence, do not trigger session recovery
5212 since we're invoked within one */
5213 ret = nfs41_setup_sequence(data->clp->cl_session,
5214 &data->args->la_seq_args,
5215 &data->res->lr_seq_res, task);
5217 BUG_ON(ret == -EAGAIN);
5218 rpc_call_start(task);
5219 dprintk("<-- %s\n", __func__);
5223 * Called from nfs4_state_manager thread for session setup, so don't recover
5224 * from sequence operation or clientid errors.
5226 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5228 struct nfs4_get_lease_time_data *data =
5229 (struct nfs4_get_lease_time_data *)calldata;
5231 dprintk("--> %s\n", __func__);
5232 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5234 switch (task->tk_status) {
5235 case -NFS4ERR_DELAY:
5236 case -NFS4ERR_GRACE:
5237 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5238 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5239 task->tk_status = 0;
5241 case -NFS4ERR_RETRY_UNCACHED_REP:
5242 rpc_restart_call_prepare(task);
5245 dprintk("<-- %s\n", __func__);
5248 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5249 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5250 .rpc_call_done = nfs4_get_lease_time_done,
5253 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5255 struct rpc_task *task;
5256 struct nfs4_get_lease_time_args args;
5257 struct nfs4_get_lease_time_res res = {
5258 .lr_fsinfo = fsinfo,
5260 struct nfs4_get_lease_time_data data = {
5265 struct rpc_message msg = {
5266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5270 struct rpc_task_setup task_setup = {
5271 .rpc_client = clp->cl_rpcclient,
5272 .rpc_message = &msg,
5273 .callback_ops = &nfs4_get_lease_time_ops,
5274 .callback_data = &data,
5275 .flags = RPC_TASK_TIMEOUT,
5279 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5280 dprintk("--> %s\n", __func__);
5281 task = rpc_run_task(&task_setup);
5284 status = PTR_ERR(task);
5286 status = task->tk_status;
5289 dprintk("<-- %s return %d\n", __func__, status);
5294 static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5296 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5299 static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5300 struct nfs4_slot *new,
5304 struct nfs4_slot *old = NULL;
5307 spin_lock(&tbl->slot_tbl_lock);
5311 tbl->max_slots = max_slots;
5313 tbl->highest_used_slotid = -1; /* no slot is currently used */
5314 for (i = 0; i < tbl->max_slots; i++)
5315 tbl->slots[i].seq_nr = ivalue;
5316 spin_unlock(&tbl->slot_tbl_lock);
5321 * (re)Initialise a slot table
5323 static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5326 struct nfs4_slot *new = NULL;
5329 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5330 max_reqs, tbl->max_slots);
5332 /* Does the newly negotiated max_reqs match the existing slot table? */
5333 if (max_reqs != tbl->max_slots) {
5334 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
5340 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
5341 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5342 tbl, tbl->slots, tbl->max_slots);
5344 dprintk("<-- %s: return %d\n", __func__, ret);
5348 /* Destroy the slot table */
5349 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5351 if (session->fc_slot_table.slots != NULL) {
5352 kfree(session->fc_slot_table.slots);
5353 session->fc_slot_table.slots = NULL;
5355 if (session->bc_slot_table.slots != NULL) {
5356 kfree(session->bc_slot_table.slots);
5357 session->bc_slot_table.slots = NULL;
5363 * Initialize or reset the forechannel and backchannel tables
5365 static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5367 struct nfs4_slot_table *tbl;
5370 dprintk("--> %s\n", __func__);
5372 tbl = &ses->fc_slot_table;
5373 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5374 if (status) /* -ENOMEM */
5377 tbl = &ses->bc_slot_table;
5378 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5379 if (status && tbl->slots == NULL)
5380 /* Fore and back channel share a connection so get
5381 * both slot tables or neither */
5382 nfs4_destroy_slot_tables(ses);
5386 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5388 struct nfs4_session *session;
5389 struct nfs4_slot_table *tbl;
5391 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5395 tbl = &session->fc_slot_table;
5396 tbl->highest_used_slotid = NFS4_NO_SLOT;
5397 spin_lock_init(&tbl->slot_tbl_lock);
5398 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5399 init_completion(&tbl->complete);
5401 tbl = &session->bc_slot_table;
5402 tbl->highest_used_slotid = NFS4_NO_SLOT;
5403 spin_lock_init(&tbl->slot_tbl_lock);
5404 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5405 init_completion(&tbl->complete);
5407 session->session_state = 1<<NFS4_SESSION_INITING;
5413 void nfs4_destroy_session(struct nfs4_session *session)
5415 struct rpc_xprt *xprt;
5417 nfs4_proc_destroy_session(session);
5420 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5422 dprintk("%s Destroy backchannel for xprt %p\n",
5424 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5425 nfs4_destroy_slot_tables(session);
5430 * Initialize the values to be used by the client in CREATE_SESSION
5431 * If nfs4_init_session set the fore channel request and response sizes,
5434 * Set the back channel max_resp_sz_cached to zero to force the client to
5435 * always set csa_cachethis to FALSE because the current implementation
5436 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5438 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5440 struct nfs4_session *session = args->client->cl_session;
5441 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5442 mxresp_sz = session->fc_attrs.max_resp_sz;
5445 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5447 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5448 /* Fore channel attributes */
5449 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5450 args->fc_attrs.max_resp_sz = mxresp_sz;
5451 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5452 args->fc_attrs.max_reqs = max_session_slots;
5454 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5455 "max_ops=%u max_reqs=%u\n",
5457 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5458 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5460 /* Back channel attributes */
5461 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5462 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5463 args->bc_attrs.max_resp_sz_cached = 0;
5464 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5465 args->bc_attrs.max_reqs = 1;
5467 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5468 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5470 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5471 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5472 args->bc_attrs.max_reqs);
5475 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5477 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5478 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5480 if (rcvd->max_resp_sz > sent->max_resp_sz)
5483 * Our requested max_ops is the minimum we need; we're not
5484 * prepared to break up compounds into smaller pieces than that.
5485 * So, no point even trying to continue if the server won't
5488 if (rcvd->max_ops < sent->max_ops)
5490 if (rcvd->max_reqs == 0)
5492 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5493 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5497 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5499 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5500 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5502 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5504 if (rcvd->max_resp_sz < sent->max_resp_sz)
5506 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5508 /* These would render the backchannel useless: */
5509 if (rcvd->max_ops != sent->max_ops)
5511 if (rcvd->max_reqs != sent->max_reqs)
5516 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5517 struct nfs4_session *session)
5521 ret = nfs4_verify_fore_channel_attrs(args, session);
5524 return nfs4_verify_back_channel_attrs(args, session);
5527 static int _nfs4_proc_create_session(struct nfs_client *clp)
5529 struct nfs4_session *session = clp->cl_session;
5530 struct nfs41_create_session_args args = {
5532 .cb_program = NFS4_CALLBACK,
5534 struct nfs41_create_session_res res = {
5537 struct rpc_message msg = {
5538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5544 nfs4_init_channel_attrs(&args);
5545 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5547 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5550 /* Verify the session's negotiated channel_attrs values */
5551 status = nfs4_verify_channel_attrs(&args, session);
5553 /* Increment the clientid slot sequence id */
5561 * Issues a CREATE_SESSION operation to the server.
5562 * It is the responsibility of the caller to verify the session is
5563 * expired before calling this routine.
5565 int nfs4_proc_create_session(struct nfs_client *clp)
5569 struct nfs4_session *session = clp->cl_session;
5571 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5573 status = _nfs4_proc_create_session(clp);
5577 /* Init or reset the session slot tables */
5578 status = nfs4_setup_session_slot_tables(session);
5579 dprintk("slot table setup returned %d\n", status);
5583 ptr = (unsigned *)&session->sess_id.data[0];
5584 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5585 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5587 dprintk("<-- %s\n", __func__);
5592 * Issue the over-the-wire RPC DESTROY_SESSION.
5593 * The caller must serialize access to this routine.
5595 int nfs4_proc_destroy_session(struct nfs4_session *session)
5598 struct rpc_message msg;
5600 dprintk("--> nfs4_proc_destroy_session\n");
5602 /* session is still being setup */
5603 if (session->clp->cl_cons_state != NFS_CS_READY)
5606 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5607 msg.rpc_argp = session;
5608 msg.rpc_resp = NULL;
5609 msg.rpc_cred = NULL;
5610 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5614 "NFS: Got error %d from the server on DESTROY_SESSION. "
5615 "Session has been destroyed regardless...\n", status);
5617 dprintk("<-- nfs4_proc_destroy_session\n");
5621 int nfs4_init_session(struct nfs_server *server)
5623 struct nfs_client *clp = server->nfs_client;
5624 struct nfs4_session *session;
5625 unsigned int rsize, wsize;
5628 if (!nfs4_has_session(clp))
5631 session = clp->cl_session;
5632 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5635 rsize = server->rsize;
5637 rsize = NFS_MAX_FILE_IO_SIZE;
5638 wsize = server->wsize;
5640 wsize = NFS_MAX_FILE_IO_SIZE;
5642 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5643 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5645 ret = nfs4_recover_expired_lease(server);
5647 ret = nfs4_check_client_ready(clp);
5651 int nfs4_init_ds_session(struct nfs_client *clp)
5653 struct nfs4_session *session = clp->cl_session;
5656 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5659 ret = nfs4_client_recover_expired_lease(clp);
5661 /* Test for the DS role */
5662 if (!is_ds_client(clp))
5665 ret = nfs4_check_client_ready(clp);
5669 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5673 * Renew the cl_session lease.
5675 struct nfs4_sequence_data {
5676 struct nfs_client *clp;
5677 struct nfs4_sequence_args args;
5678 struct nfs4_sequence_res res;
5681 static void nfs41_sequence_release(void *data)
5683 struct nfs4_sequence_data *calldata = data;
5684 struct nfs_client *clp = calldata->clp;
5686 if (atomic_read(&clp->cl_count) > 1)
5687 nfs4_schedule_state_renewal(clp);
5688 nfs_put_client(clp);
5692 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5694 switch(task->tk_status) {
5695 case -NFS4ERR_DELAY:
5696 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5699 nfs4_schedule_lease_recovery(clp);
5704 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5706 struct nfs4_sequence_data *calldata = data;
5707 struct nfs_client *clp = calldata->clp;
5709 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5712 if (task->tk_status < 0) {
5713 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5714 if (atomic_read(&clp->cl_count) == 1)
5717 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5718 rpc_restart_call_prepare(task);
5722 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5724 dprintk("<-- %s\n", __func__);
5727 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5729 struct nfs4_sequence_data *calldata = data;
5730 struct nfs_client *clp = calldata->clp;
5731 struct nfs4_sequence_args *args;
5732 struct nfs4_sequence_res *res;
5734 args = task->tk_msg.rpc_argp;
5735 res = task->tk_msg.rpc_resp;
5737 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
5739 rpc_call_start(task);
5742 static const struct rpc_call_ops nfs41_sequence_ops = {
5743 .rpc_call_done = nfs41_sequence_call_done,
5744 .rpc_call_prepare = nfs41_sequence_prepare,
5745 .rpc_release = nfs41_sequence_release,
5748 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5750 struct nfs4_sequence_data *calldata;
5751 struct rpc_message msg = {
5752 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5755 struct rpc_task_setup task_setup_data = {
5756 .rpc_client = clp->cl_rpcclient,
5757 .rpc_message = &msg,
5758 .callback_ops = &nfs41_sequence_ops,
5759 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5762 if (!atomic_inc_not_zero(&clp->cl_count))
5763 return ERR_PTR(-EIO);
5764 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5765 if (calldata == NULL) {
5766 nfs_put_client(clp);
5767 return ERR_PTR(-ENOMEM);
5769 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5770 msg.rpc_argp = &calldata->args;
5771 msg.rpc_resp = &calldata->res;
5772 calldata->clp = clp;
5773 task_setup_data.callback_data = calldata;
5775 return rpc_run_task(&task_setup_data);
5778 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5780 struct rpc_task *task;
5783 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5785 task = _nfs41_proc_sequence(clp, cred);
5787 ret = PTR_ERR(task);
5789 rpc_put_task_async(task);
5790 dprintk("<-- %s status=%d\n", __func__, ret);
5794 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5796 struct rpc_task *task;
5799 task = _nfs41_proc_sequence(clp, cred);
5801 ret = PTR_ERR(task);
5804 ret = rpc_wait_for_completion_task(task);
5806 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5808 if (task->tk_status == 0)
5809 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5810 ret = task->tk_status;
5814 dprintk("<-- %s status=%d\n", __func__, ret);
5818 struct nfs4_reclaim_complete_data {
5819 struct nfs_client *clp;
5820 struct nfs41_reclaim_complete_args arg;
5821 struct nfs41_reclaim_complete_res res;
5824 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5826 struct nfs4_reclaim_complete_data *calldata = data;
5828 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5829 if (nfs41_setup_sequence(calldata->clp->cl_session,
5830 &calldata->arg.seq_args,
5831 &calldata->res.seq_res, task))
5834 rpc_call_start(task);
5837 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5839 switch(task->tk_status) {
5841 case -NFS4ERR_COMPLETE_ALREADY:
5842 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5844 case -NFS4ERR_DELAY:
5845 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5847 case -NFS4ERR_RETRY_UNCACHED_REP:
5850 nfs4_schedule_lease_recovery(clp);
5855 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5857 struct nfs4_reclaim_complete_data *calldata = data;
5858 struct nfs_client *clp = calldata->clp;
5859 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5861 dprintk("--> %s\n", __func__);
5862 if (!nfs41_sequence_done(task, res))
5865 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5866 rpc_restart_call_prepare(task);
5869 dprintk("<-- %s\n", __func__);
5872 static void nfs4_free_reclaim_complete_data(void *data)
5874 struct nfs4_reclaim_complete_data *calldata = data;
5879 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5880 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5881 .rpc_call_done = nfs4_reclaim_complete_done,
5882 .rpc_release = nfs4_free_reclaim_complete_data,
5886 * Issue a global reclaim complete.
5888 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5890 struct nfs4_reclaim_complete_data *calldata;
5891 struct rpc_task *task;
5892 struct rpc_message msg = {
5893 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5895 struct rpc_task_setup task_setup_data = {
5896 .rpc_client = clp->cl_rpcclient,
5897 .rpc_message = &msg,
5898 .callback_ops = &nfs4_reclaim_complete_call_ops,
5899 .flags = RPC_TASK_ASYNC,
5901 int status = -ENOMEM;
5903 dprintk("--> %s\n", __func__);
5904 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5905 if (calldata == NULL)
5907 calldata->clp = clp;
5908 calldata->arg.one_fs = 0;
5910 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
5911 msg.rpc_argp = &calldata->arg;
5912 msg.rpc_resp = &calldata->res;
5913 task_setup_data.callback_data = calldata;
5914 task = rpc_run_task(&task_setup_data);
5916 status = PTR_ERR(task);
5919 status = nfs4_wait_for_completion_rpc_task(task);
5921 status = task->tk_status;
5925 dprintk("<-- %s status=%d\n", __func__, status);
5930 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5932 struct nfs4_layoutget *lgp = calldata;
5933 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5935 dprintk("--> %s\n", __func__);
5936 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5937 * right now covering the LAYOUTGET we are about to send.
5938 * However, that is not so catastrophic, and there seems
5939 * to be no way to prevent it completely.
5941 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5942 &lgp->res.seq_res, task))
5944 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5945 NFS_I(lgp->args.inode)->layout,
5946 lgp->args.ctx->state)) {
5947 rpc_exit(task, NFS4_OK);
5950 rpc_call_start(task);
5953 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5955 struct nfs4_layoutget *lgp = calldata;
5956 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5958 dprintk("--> %s\n", __func__);
5960 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5963 switch (task->tk_status) {
5966 case -NFS4ERR_LAYOUTTRYLATER:
5967 case -NFS4ERR_RECALLCONFLICT:
5968 task->tk_status = -NFS4ERR_DELAY;
5971 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5972 rpc_restart_call_prepare(task);
5976 dprintk("<-- %s\n", __func__);
5979 static void nfs4_layoutget_release(void *calldata)
5981 struct nfs4_layoutget *lgp = calldata;
5983 dprintk("--> %s\n", __func__);
5984 put_nfs_open_context(lgp->args.ctx);
5986 dprintk("<-- %s\n", __func__);
5989 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5990 .rpc_call_prepare = nfs4_layoutget_prepare,
5991 .rpc_call_done = nfs4_layoutget_done,
5992 .rpc_release = nfs4_layoutget_release,
5995 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5997 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5998 struct rpc_task *task;
5999 struct rpc_message msg = {
6000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6001 .rpc_argp = &lgp->args,
6002 .rpc_resp = &lgp->res,
6004 struct rpc_task_setup task_setup_data = {
6005 .rpc_client = server->client,
6006 .rpc_message = &msg,
6007 .callback_ops = &nfs4_layoutget_call_ops,
6008 .callback_data = lgp,
6009 .flags = RPC_TASK_ASYNC,
6013 dprintk("--> %s\n", __func__);
6015 lgp->res.layoutp = &lgp->args.layout;
6016 lgp->res.seq_res.sr_slot = NULL;
6017 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6018 task = rpc_run_task(&task_setup_data);
6020 return PTR_ERR(task);
6021 status = nfs4_wait_for_completion_rpc_task(task);
6023 status = task->tk_status;
6025 status = pnfs_layout_process(lgp);
6027 dprintk("<-- %s status=%d\n", __func__, status);
6032 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6034 struct nfs4_layoutreturn *lrp = calldata;
6036 dprintk("--> %s\n", __func__);
6037 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
6038 &lrp->res.seq_res, task))
6040 rpc_call_start(task);
6043 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6045 struct nfs4_layoutreturn *lrp = calldata;
6046 struct nfs_server *server;
6047 struct pnfs_layout_hdr *lo = lrp->args.layout;
6049 dprintk("--> %s\n", __func__);
6051 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6054 server = NFS_SERVER(lrp->args.inode);
6055 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6056 rpc_restart_call_prepare(task);
6059 spin_lock(&lo->plh_inode->i_lock);
6060 if (task->tk_status == 0) {
6061 if (lrp->res.lrs_present) {
6062 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6064 BUG_ON(!list_empty(&lo->plh_segs));
6066 lo->plh_block_lgets--;
6067 spin_unlock(&lo->plh_inode->i_lock);
6068 dprintk("<-- %s\n", __func__);
6071 static void nfs4_layoutreturn_release(void *calldata)
6073 struct nfs4_layoutreturn *lrp = calldata;
6075 dprintk("--> %s\n", __func__);
6076 put_layout_hdr(lrp->args.layout);
6078 dprintk("<-- %s\n", __func__);
6081 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6082 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6083 .rpc_call_done = nfs4_layoutreturn_done,
6084 .rpc_release = nfs4_layoutreturn_release,
6087 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6089 struct rpc_task *task;
6090 struct rpc_message msg = {
6091 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6092 .rpc_argp = &lrp->args,
6093 .rpc_resp = &lrp->res,
6095 struct rpc_task_setup task_setup_data = {
6096 .rpc_client = lrp->clp->cl_rpcclient,
6097 .rpc_message = &msg,
6098 .callback_ops = &nfs4_layoutreturn_call_ops,
6099 .callback_data = lrp,
6103 dprintk("--> %s\n", __func__);
6104 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6105 task = rpc_run_task(&task_setup_data);
6107 return PTR_ERR(task);
6108 status = task->tk_status;
6109 dprintk("<-- %s status=%d\n", __func__, status);
6115 * Retrieve the list of Data Server devices from the MDS.
6117 static int _nfs4_getdevicelist(struct nfs_server *server,
6118 const struct nfs_fh *fh,
6119 struct pnfs_devicelist *devlist)
6121 struct nfs4_getdevicelist_args args = {
6123 .layoutclass = server->pnfs_curr_ld->id,
6125 struct nfs4_getdevicelist_res res = {
6128 struct rpc_message msg = {
6129 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6135 dprintk("--> %s\n", __func__);
6136 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6138 dprintk("<-- %s status=%d\n", __func__, status);
6142 int nfs4_proc_getdevicelist(struct nfs_server *server,
6143 const struct nfs_fh *fh,
6144 struct pnfs_devicelist *devlist)
6146 struct nfs4_exception exception = { };
6150 err = nfs4_handle_exception(server,
6151 _nfs4_getdevicelist(server, fh, devlist),
6153 } while (exception.retry);
6155 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6156 err, devlist->num_devs);
6160 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6163 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6165 struct nfs4_getdeviceinfo_args args = {
6168 struct nfs4_getdeviceinfo_res res = {
6171 struct rpc_message msg = {
6172 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6178 dprintk("--> %s\n", __func__);
6179 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6180 dprintk("<-- %s status=%d\n", __func__, status);
6185 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6187 struct nfs4_exception exception = { };
6191 err = nfs4_handle_exception(server,
6192 _nfs4_proc_getdeviceinfo(server, pdev),
6194 } while (exception.retry);
6197 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6199 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6201 struct nfs4_layoutcommit_data *data = calldata;
6202 struct nfs_server *server = NFS_SERVER(data->args.inode);
6204 if (nfs4_setup_sequence(server, &data->args.seq_args,
6205 &data->res.seq_res, task))
6207 rpc_call_start(task);
6211 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6213 struct nfs4_layoutcommit_data *data = calldata;
6214 struct nfs_server *server = NFS_SERVER(data->args.inode);
6216 if (!nfs4_sequence_done(task, &data->res.seq_res))
6219 switch (task->tk_status) { /* Just ignore these failures */
6220 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6221 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6222 case -NFS4ERR_BADLAYOUT: /* no layout */
6223 case -NFS4ERR_GRACE: /* loca_recalim always false */
6224 task->tk_status = 0;
6227 nfs_post_op_update_inode_force_wcc(data->args.inode,
6231 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6232 rpc_restart_call_prepare(task);
6238 static void nfs4_layoutcommit_release(void *calldata)
6240 struct nfs4_layoutcommit_data *data = calldata;
6241 struct pnfs_layout_segment *lseg, *tmp;
6242 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6244 pnfs_cleanup_layoutcommit(data);
6245 /* Matched by references in pnfs_set_layoutcommit */
6246 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6247 list_del_init(&lseg->pls_lc_list);
6248 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6253 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6254 smp_mb__after_clear_bit();
6255 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6257 put_rpccred(data->cred);
6261 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6262 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6263 .rpc_call_done = nfs4_layoutcommit_done,
6264 .rpc_release = nfs4_layoutcommit_release,
6268 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6270 struct rpc_message msg = {
6271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6272 .rpc_argp = &data->args,
6273 .rpc_resp = &data->res,
6274 .rpc_cred = data->cred,
6276 struct rpc_task_setup task_setup_data = {
6277 .task = &data->task,
6278 .rpc_client = NFS_CLIENT(data->args.inode),
6279 .rpc_message = &msg,
6280 .callback_ops = &nfs4_layoutcommit_ops,
6281 .callback_data = data,
6282 .flags = RPC_TASK_ASYNC,
6284 struct rpc_task *task;
6287 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6288 "lbw: %llu inode %lu\n",
6289 data->task.tk_pid, sync,
6290 data->args.lastbytewritten,
6291 data->args.inode->i_ino);
6293 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6294 task = rpc_run_task(&task_setup_data);
6296 return PTR_ERR(task);
6299 status = nfs4_wait_for_completion_rpc_task(task);
6302 status = task->tk_status;
6304 dprintk("%s: status %d\n", __func__, status);
6310 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6311 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6313 struct nfs41_secinfo_no_name_args args = {
6314 .style = SECINFO_STYLE_CURRENT_FH,
6316 struct nfs4_secinfo_res res = {
6319 struct rpc_message msg = {
6320 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6324 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6328 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6329 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6331 struct nfs4_exception exception = { };
6334 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6337 case -NFS4ERR_WRONGSEC:
6338 case -NFS4ERR_NOTSUPP:
6341 err = nfs4_handle_exception(server, err, &exception);
6343 } while (exception.retry);
6349 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6350 struct nfs_fsinfo *info)
6354 rpc_authflavor_t flavor;
6355 struct nfs4_secinfo_flavors *flavors;
6357 page = alloc_page(GFP_KERNEL);
6363 flavors = page_address(page);
6364 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6367 * Fall back on "guess and check" method if
6368 * the server doesn't support SECINFO_NO_NAME
6370 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6371 err = nfs4_find_root_sec(server, fhandle, info);
6377 flavor = nfs_find_best_sec(flavors);
6379 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6389 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6392 struct nfs41_test_stateid_args args = {
6395 struct nfs41_test_stateid_res res;
6396 struct rpc_message msg = {
6397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6402 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6403 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6405 if (status == NFS_OK)
6410 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6412 struct nfs4_exception exception = { };
6415 err = nfs4_handle_exception(server,
6416 _nfs41_test_stateid(server, stateid),
6418 } while (exception.retry);
6422 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6424 struct nfs41_free_stateid_args args = {
6427 struct nfs41_free_stateid_res res;
6428 struct rpc_message msg = {
6429 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6434 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6435 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6438 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6440 struct nfs4_exception exception = { };
6443 err = nfs4_handle_exception(server,
6444 _nfs4_free_stateid(server, stateid),
6446 } while (exception.retry);
6450 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6451 const nfs4_stateid *s2)
6453 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6456 if (s1->seqid == s2->seqid)
6458 if (s1->seqid == 0 || s2->seqid == 0)
6464 #endif /* CONFIG_NFS_V4_1 */
6466 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6467 const nfs4_stateid *s2)
6469 return nfs4_stateid_match(s1, s2);
6473 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6474 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6475 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6476 .recover_open = nfs4_open_reclaim,
6477 .recover_lock = nfs4_lock_reclaim,
6478 .establish_clid = nfs4_init_clientid,
6479 .get_clid_cred = nfs4_get_setclientid_cred,
6482 #if defined(CONFIG_NFS_V4_1)
6483 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6484 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6485 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6486 .recover_open = nfs4_open_reclaim,
6487 .recover_lock = nfs4_lock_reclaim,
6488 .establish_clid = nfs41_init_clientid,
6489 .get_clid_cred = nfs4_get_exchange_id_cred,
6490 .reclaim_complete = nfs41_proc_reclaim_complete,
6492 #endif /* CONFIG_NFS_V4_1 */
6494 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6495 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6496 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6497 .recover_open = nfs4_open_expired,
6498 .recover_lock = nfs4_lock_expired,
6499 .establish_clid = nfs4_init_clientid,
6500 .get_clid_cred = nfs4_get_setclientid_cred,
6503 #if defined(CONFIG_NFS_V4_1)
6504 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6505 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6506 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6507 .recover_open = nfs41_open_expired,
6508 .recover_lock = nfs41_lock_expired,
6509 .establish_clid = nfs41_init_clientid,
6510 .get_clid_cred = nfs4_get_exchange_id_cred,
6512 #endif /* CONFIG_NFS_V4_1 */
6514 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6515 .sched_state_renewal = nfs4_proc_async_renew,
6516 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6517 .renew_lease = nfs4_proc_renew,
6520 #if defined(CONFIG_NFS_V4_1)
6521 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6522 .sched_state_renewal = nfs41_proc_async_sequence,
6523 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6524 .renew_lease = nfs4_proc_sequence,
6528 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6530 .call_sync = _nfs4_call_sync,
6531 .match_stateid = nfs4_match_stateid,
6532 .find_root_sec = nfs4_find_root_sec,
6533 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6534 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6535 .state_renewal_ops = &nfs40_state_renewal_ops,
6538 #if defined(CONFIG_NFS_V4_1)
6539 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6541 .call_sync = _nfs4_call_sync_session,
6542 .match_stateid = nfs41_match_stateid,
6543 .find_root_sec = nfs41_find_root_sec,
6544 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6545 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6546 .state_renewal_ops = &nfs41_state_renewal_ops,
6550 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6551 [0] = &nfs_v4_0_minor_ops,
6552 #if defined(CONFIG_NFS_V4_1)
6553 [1] = &nfs_v4_1_minor_ops,
6557 static const struct inode_operations nfs4_file_inode_operations = {
6558 .permission = nfs_permission,
6559 .getattr = nfs_getattr,
6560 .setattr = nfs_setattr,
6561 .getxattr = generic_getxattr,
6562 .setxattr = generic_setxattr,
6563 .listxattr = generic_listxattr,
6564 .removexattr = generic_removexattr,
6567 const struct nfs_rpc_ops nfs_v4_clientops = {
6568 .version = 4, /* protocol version */
6569 .dentry_ops = &nfs4_dentry_operations,
6570 .dir_inode_ops = &nfs4_dir_inode_operations,
6571 .file_inode_ops = &nfs4_file_inode_operations,
6572 .file_ops = &nfs4_file_operations,
6573 .getroot = nfs4_proc_get_root,
6574 .submount = nfs4_submount,
6575 .getattr = nfs4_proc_getattr,
6576 .setattr = nfs4_proc_setattr,
6577 .lookup = nfs4_proc_lookup,
6578 .access = nfs4_proc_access,
6579 .readlink = nfs4_proc_readlink,
6580 .create = nfs4_proc_create,
6581 .remove = nfs4_proc_remove,
6582 .unlink_setup = nfs4_proc_unlink_setup,
6583 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
6584 .unlink_done = nfs4_proc_unlink_done,
6585 .rename = nfs4_proc_rename,
6586 .rename_setup = nfs4_proc_rename_setup,
6587 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
6588 .rename_done = nfs4_proc_rename_done,
6589 .link = nfs4_proc_link,
6590 .symlink = nfs4_proc_symlink,
6591 .mkdir = nfs4_proc_mkdir,
6592 .rmdir = nfs4_proc_remove,
6593 .readdir = nfs4_proc_readdir,
6594 .mknod = nfs4_proc_mknod,
6595 .statfs = nfs4_proc_statfs,
6596 .fsinfo = nfs4_proc_fsinfo,
6597 .pathconf = nfs4_proc_pathconf,
6598 .set_capabilities = nfs4_server_capabilities,
6599 .decode_dirent = nfs4_decode_dirent,
6600 .read_setup = nfs4_proc_read_setup,
6601 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
6602 .read_done = nfs4_read_done,
6603 .write_setup = nfs4_proc_write_setup,
6604 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6605 .write_done = nfs4_write_done,
6606 .commit_setup = nfs4_proc_commit_setup,
6607 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
6608 .commit_done = nfs4_commit_done,
6609 .lock = nfs4_proc_lock,
6610 .clear_acl_cache = nfs4_zap_acl_attr,
6611 .close_context = nfs4_close_context,
6612 .open_context = nfs4_atomic_open,
6613 .init_client = nfs4_init_client,
6616 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6617 .prefix = XATTR_NAME_NFSV4_ACL,
6618 .list = nfs4_xattr_list_nfs4_acl,
6619 .get = nfs4_xattr_get_nfs4_acl,
6620 .set = nfs4_xattr_set_nfs4_acl,
6623 const struct xattr_handler *nfs4_xattr_handlers[] = {
6624 &nfs4_xattr_nfs4_acl_handler,
6628 module_param(max_session_slots, ushort, 0644);
6629 MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6630 "requests the client will negotiate");