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"
69 #define NFSDBG_FACILITY NFSDBG_PROC
71 #define NFS4_POLL_RETRY_MIN (HZ/10)
72 #define NFS4_POLL_RETRY_MAX (15*HZ)
74 #define NFS4_MAX_LOOP_ON_RECOVER (10)
76 static unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE;
79 static int _nfs4_proc_open(struct nfs4_opendata *data);
80 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
81 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
82 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
83 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
84 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
85 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
86 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
87 struct nfs_fattr *fattr, struct iattr *sattr,
88 struct nfs4_state *state);
89 #ifdef CONFIG_NFS_V4_1
90 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
91 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
93 /* Prevent leaks of NFSv4 errors into userland */
94 static int nfs4_map_errors(int err)
99 case -NFS4ERR_RESOURCE:
101 case -NFS4ERR_WRONGSEC:
103 case -NFS4ERR_BADOWNER:
104 case -NFS4ERR_BADNAME:
106 case -NFS4ERR_SHARE_DENIED:
109 dprintk("%s could not handle NFSv4 error %d\n",
117 * This is our standard bitmap for GETATTR requests.
119 const u32 nfs4_fattr_bitmap[2] = {
121 | FATTR4_WORD0_CHANGE
124 | FATTR4_WORD0_FILEID,
126 | FATTR4_WORD1_NUMLINKS
128 | FATTR4_WORD1_OWNER_GROUP
129 | FATTR4_WORD1_RAWDEV
130 | FATTR4_WORD1_SPACE_USED
131 | FATTR4_WORD1_TIME_ACCESS
132 | FATTR4_WORD1_TIME_METADATA
133 | FATTR4_WORD1_TIME_MODIFY
136 const u32 nfs4_statfs_bitmap[2] = {
137 FATTR4_WORD0_FILES_AVAIL
138 | FATTR4_WORD0_FILES_FREE
139 | FATTR4_WORD0_FILES_TOTAL,
140 FATTR4_WORD1_SPACE_AVAIL
141 | FATTR4_WORD1_SPACE_FREE
142 | FATTR4_WORD1_SPACE_TOTAL
145 const u32 nfs4_pathconf_bitmap[2] = {
147 | FATTR4_WORD0_MAXNAME,
151 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
152 | FATTR4_WORD0_MAXREAD
153 | FATTR4_WORD0_MAXWRITE
154 | FATTR4_WORD0_LEASE_TIME,
155 FATTR4_WORD1_TIME_DELTA
156 | FATTR4_WORD1_FS_LAYOUT_TYPES,
157 FATTR4_WORD2_LAYOUT_BLKSIZE
160 const u32 nfs4_fs_locations_bitmap[2] = {
162 | FATTR4_WORD0_CHANGE
165 | FATTR4_WORD0_FILEID
166 | FATTR4_WORD0_FS_LOCATIONS,
168 | FATTR4_WORD1_NUMLINKS
170 | FATTR4_WORD1_OWNER_GROUP
171 | FATTR4_WORD1_RAWDEV
172 | FATTR4_WORD1_SPACE_USED
173 | FATTR4_WORD1_TIME_ACCESS
174 | FATTR4_WORD1_TIME_METADATA
175 | FATTR4_WORD1_TIME_MODIFY
176 | FATTR4_WORD1_MOUNTED_ON_FILEID
179 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
180 struct nfs4_readdir_arg *readdir)
184 BUG_ON(readdir->count < 80);
186 readdir->cookie = cookie;
187 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
192 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
197 * NFSv4 servers do not return entries for '.' and '..'
198 * Therefore, we fake these entries here. We let '.'
199 * have cookie 0 and '..' have cookie 1. Note that
200 * when talking to the server, we always send cookie 0
203 start = p = kmap_atomic(*readdir->pages);
206 *p++ = xdr_one; /* next */
207 *p++ = xdr_zero; /* cookie, first word */
208 *p++ = xdr_one; /* cookie, second word */
209 *p++ = xdr_one; /* entry len */
210 memcpy(p, ".\0\0\0", 4); /* entry */
212 *p++ = xdr_one; /* bitmap length */
213 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
214 *p++ = htonl(8); /* attribute buffer length */
215 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
218 *p++ = xdr_one; /* next */
219 *p++ = xdr_zero; /* cookie, first word */
220 *p++ = xdr_two; /* cookie, second word */
221 *p++ = xdr_two; /* entry len */
222 memcpy(p, "..\0\0", 4); /* entry */
224 *p++ = xdr_one; /* bitmap length */
225 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
226 *p++ = htonl(8); /* attribute buffer length */
227 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
229 readdir->pgbase = (char *)p - (char *)start;
230 readdir->count -= readdir->pgbase;
231 kunmap_atomic(start);
234 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
240 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
241 nfs_wait_bit_killable, TASK_KILLABLE);
245 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
252 *timeout = NFS4_POLL_RETRY_MIN;
253 if (*timeout > NFS4_POLL_RETRY_MAX)
254 *timeout = NFS4_POLL_RETRY_MAX;
255 freezable_schedule_timeout_killable(*timeout);
256 if (fatal_signal_pending(current))
262 /* This is the error handling routine for processes that are allowed
265 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
267 struct nfs_client *clp = server->nfs_client;
268 struct nfs4_state *state = exception->state;
269 struct inode *inode = exception->inode;
272 exception->retry = 0;
276 case -NFS4ERR_OPENMODE:
277 if (inode && nfs_have_delegation(inode, FMODE_READ)) {
278 nfs_inode_return_delegation(inode);
279 exception->retry = 1;
284 nfs4_schedule_stateid_recovery(server, state);
285 goto wait_on_recovery;
286 case -NFS4ERR_DELEG_REVOKED:
287 case -NFS4ERR_ADMIN_REVOKED:
288 case -NFS4ERR_BAD_STATEID:
291 nfs_remove_bad_delegation(state->inode);
292 nfs4_schedule_stateid_recovery(server, state);
293 goto wait_on_recovery;
294 case -NFS4ERR_EXPIRED:
296 nfs4_schedule_stateid_recovery(server, state);
297 case -NFS4ERR_STALE_STATEID:
298 case -NFS4ERR_STALE_CLIENTID:
299 nfs4_schedule_lease_recovery(clp);
300 goto wait_on_recovery;
301 #if defined(CONFIG_NFS_V4_1)
302 case -NFS4ERR_BADSESSION:
303 case -NFS4ERR_BADSLOT:
304 case -NFS4ERR_BAD_HIGH_SLOT:
305 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
306 case -NFS4ERR_DEADSESSION:
307 case -NFS4ERR_SEQ_FALSE_RETRY:
308 case -NFS4ERR_SEQ_MISORDERED:
309 dprintk("%s ERROR: %d Reset session\n", __func__,
311 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
312 exception->retry = 1;
314 #endif /* defined(CONFIG_NFS_V4_1) */
315 case -NFS4ERR_FILE_OPEN:
316 if (exception->timeout > HZ) {
317 /* We have retried a decent amount, time to
326 ret = nfs4_delay(server->client, &exception->timeout);
329 case -NFS4ERR_RETRY_UNCACHED_REP:
330 case -NFS4ERR_OLD_STATEID:
331 exception->retry = 1;
333 case -NFS4ERR_BADOWNER:
334 /* The following works around a Linux server bug! */
335 case -NFS4ERR_BADNAME:
336 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
337 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
338 exception->retry = 1;
339 printk(KERN_WARNING "NFS: v4 server %s "
340 "does not accept raw "
342 "Reenabling the idmapper.\n",
343 server->nfs_client->cl_hostname);
346 /* We failed to handle the error */
347 return nfs4_map_errors(ret);
349 ret = nfs4_wait_clnt_recover(clp);
351 exception->retry = 1;
356 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
358 spin_lock(&clp->cl_lock);
359 if (time_before(clp->cl_last_renewal,timestamp))
360 clp->cl_last_renewal = timestamp;
361 spin_unlock(&clp->cl_lock);
364 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
366 do_renew_lease(server->nfs_client, timestamp);
369 #if defined(CONFIG_NFS_V4_1)
372 * nfs4_free_slot - free a slot and efficiently update slot table.
374 * freeing a slot is trivially done by clearing its respective bit
376 * If the freed slotid equals highest_used_slotid we want to update it
377 * so that the server would be able to size down the slot table if needed,
378 * otherwise we know that the highest_used_slotid is still in use.
379 * When updating highest_used_slotid there may be "holes" in the bitmap
380 * so we need to scan down from highest_used_slotid to 0 looking for the now
381 * highest slotid in use.
382 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
384 * Must be called while holding tbl->slot_tbl_lock
387 nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
389 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
390 /* clear used bit in bitmap */
391 __clear_bit(slotid, tbl->used_slots);
393 /* update highest_used_slotid when it is freed */
394 if (slotid == tbl->highest_used_slotid) {
395 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
396 if (slotid < tbl->max_slots)
397 tbl->highest_used_slotid = slotid;
399 tbl->highest_used_slotid = NFS4_NO_SLOT;
401 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
402 slotid, tbl->highest_used_slotid);
405 bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
407 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
412 * Signal state manager thread if session fore channel is drained
414 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
416 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
417 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
418 nfs4_set_task_privileged, NULL);
422 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
425 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
426 complete(&ses->fc_slot_table.complete);
430 * Signal state manager thread if session back channel is drained
432 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
434 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
435 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
437 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
438 complete(&ses->bc_slot_table.complete);
441 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
443 struct nfs4_slot_table *tbl;
445 tbl = &res->sr_session->fc_slot_table;
447 /* just wake up the next guy waiting since
448 * we may have not consumed a slot after all */
449 dprintk("%s: No slot\n", __func__);
453 spin_lock(&tbl->slot_tbl_lock);
454 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
455 nfs4_check_drain_fc_complete(res->sr_session);
456 spin_unlock(&tbl->slot_tbl_lock);
460 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
462 unsigned long timestamp;
463 struct nfs_client *clp;
466 * sr_status remains 1 if an RPC level error occurred. The server
467 * may or may not have processed the sequence operation..
468 * Proceed as if the server received and processed the sequence
471 if (res->sr_status == 1)
472 res->sr_status = NFS_OK;
474 /* don't increment the sequence number if the task wasn't sent */
475 if (!RPC_WAS_SENT(task))
478 /* Check the SEQUENCE operation status */
479 switch (res->sr_status) {
481 /* Update the slot's sequence and clientid lease timer */
482 ++res->sr_slot->seq_nr;
483 timestamp = res->sr_renewal_time;
484 clp = res->sr_session->clp;
485 do_renew_lease(clp, timestamp);
486 /* Check sequence flags */
487 if (res->sr_status_flags != 0)
488 nfs4_schedule_lease_recovery(clp);
491 /* The server detected a resend of the RPC call and
492 * returned NFS4ERR_DELAY as per Section 2.10.6.2
495 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
497 res->sr_slot - res->sr_session->fc_slot_table.slots,
498 res->sr_slot->seq_nr);
501 /* Just update the slot sequence no. */
502 ++res->sr_slot->seq_nr;
505 /* The session may be reset by one of the error handlers. */
506 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
507 nfs41_sequence_free_slot(res);
510 if (!rpc_restart_call(task))
512 rpc_delay(task, NFS4_POLL_RETRY_MAX);
516 static int nfs4_sequence_done(struct rpc_task *task,
517 struct nfs4_sequence_res *res)
519 if (res->sr_session == NULL)
521 return nfs41_sequence_done(task, res);
525 * nfs4_find_slot - efficiently look for a free slot
527 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
528 * If found, we mark the slot as used, update the highest_used_slotid,
529 * and respectively set up the sequence operation args.
530 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
532 * Note: must be called with under the slot_tbl_lock.
535 nfs4_find_slot(struct nfs4_slot_table *tbl)
538 u32 ret_id = NFS4_NO_SLOT;
540 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
541 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
543 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
544 if (slotid >= tbl->max_slots)
546 __set_bit(slotid, tbl->used_slots);
547 if (slotid > tbl->highest_used_slotid ||
548 tbl->highest_used_slotid == NFS4_NO_SLOT)
549 tbl->highest_used_slotid = slotid;
552 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
553 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
557 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
558 struct nfs4_sequence_res *res, int cache_reply)
560 args->sa_session = NULL;
561 args->sa_cache_this = 0;
563 args->sa_cache_this = 1;
564 res->sr_session = NULL;
568 int nfs41_setup_sequence(struct nfs4_session *session,
569 struct nfs4_sequence_args *args,
570 struct nfs4_sequence_res *res,
571 struct rpc_task *task)
573 struct nfs4_slot *slot;
574 struct nfs4_slot_table *tbl;
577 dprintk("--> %s\n", __func__);
578 /* slot already allocated? */
579 if (res->sr_slot != NULL)
582 tbl = &session->fc_slot_table;
584 spin_lock(&tbl->slot_tbl_lock);
585 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
586 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
587 /* The state manager will wait until the slot table is empty */
588 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
589 spin_unlock(&tbl->slot_tbl_lock);
590 dprintk("%s session is draining\n", __func__);
594 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
595 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
596 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
597 spin_unlock(&tbl->slot_tbl_lock);
598 dprintk("%s enforce FIFO order\n", __func__);
602 slotid = nfs4_find_slot(tbl);
603 if (slotid == NFS4_NO_SLOT) {
604 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
605 spin_unlock(&tbl->slot_tbl_lock);
606 dprintk("<-- %s: no free slots\n", __func__);
609 spin_unlock(&tbl->slot_tbl_lock);
611 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
612 slot = tbl->slots + slotid;
613 args->sa_session = session;
614 args->sa_slotid = slotid;
616 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
618 res->sr_session = session;
620 res->sr_renewal_time = jiffies;
621 res->sr_status_flags = 0;
623 * sr_status is only set in decode_sequence, and so will remain
624 * set to 1 if an rpc level failure occurs.
629 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
631 int nfs4_setup_sequence(const struct nfs_server *server,
632 struct nfs4_sequence_args *args,
633 struct nfs4_sequence_res *res,
634 struct rpc_task *task)
636 struct nfs4_session *session = nfs4_get_session(server);
642 dprintk("--> %s clp %p session %p sr_slot %td\n",
643 __func__, session->clp, session, res->sr_slot ?
644 res->sr_slot - session->fc_slot_table.slots : -1);
646 ret = nfs41_setup_sequence(session, args, res, task);
648 dprintk("<-- %s status=%d\n", __func__, ret);
652 struct nfs41_call_sync_data {
653 const struct nfs_server *seq_server;
654 struct nfs4_sequence_args *seq_args;
655 struct nfs4_sequence_res *seq_res;
658 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
660 struct nfs41_call_sync_data *data = calldata;
662 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
664 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
665 data->seq_res, task))
667 rpc_call_start(task);
670 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
672 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
673 nfs41_call_sync_prepare(task, calldata);
676 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
678 struct nfs41_call_sync_data *data = calldata;
680 nfs41_sequence_done(task, data->seq_res);
683 static const struct rpc_call_ops nfs41_call_sync_ops = {
684 .rpc_call_prepare = nfs41_call_sync_prepare,
685 .rpc_call_done = nfs41_call_sync_done,
688 static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
689 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
690 .rpc_call_done = nfs41_call_sync_done,
693 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
694 struct nfs_server *server,
695 struct rpc_message *msg,
696 struct nfs4_sequence_args *args,
697 struct nfs4_sequence_res *res,
701 struct rpc_task *task;
702 struct nfs41_call_sync_data data = {
703 .seq_server = server,
707 struct rpc_task_setup task_setup = {
710 .callback_ops = &nfs41_call_sync_ops,
711 .callback_data = &data
715 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
716 task = rpc_run_task(&task_setup);
720 ret = task->tk_status;
726 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
727 struct nfs_server *server,
728 struct rpc_message *msg,
729 struct nfs4_sequence_args *args,
730 struct nfs4_sequence_res *res,
733 nfs41_init_sequence(args, res, cache_reply);
734 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
739 void nfs41_init_sequence(struct nfs4_sequence_args *args,
740 struct nfs4_sequence_res *res, int cache_reply)
744 static int nfs4_sequence_done(struct rpc_task *task,
745 struct nfs4_sequence_res *res)
749 #endif /* CONFIG_NFS_V4_1 */
751 int _nfs4_call_sync(struct rpc_clnt *clnt,
752 struct nfs_server *server,
753 struct rpc_message *msg,
754 struct nfs4_sequence_args *args,
755 struct nfs4_sequence_res *res,
758 nfs41_init_sequence(args, res, cache_reply);
759 return rpc_call_sync(clnt, msg, 0);
763 int nfs4_call_sync(struct rpc_clnt *clnt,
764 struct nfs_server *server,
765 struct rpc_message *msg,
766 struct nfs4_sequence_args *args,
767 struct nfs4_sequence_res *res,
770 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
771 args, res, cache_reply);
774 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
776 struct nfs_inode *nfsi = NFS_I(dir);
778 spin_lock(&dir->i_lock);
779 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
780 if (!cinfo->atomic || cinfo->before != dir->i_version)
781 nfs_force_lookup_revalidate(dir);
782 dir->i_version = cinfo->after;
783 spin_unlock(&dir->i_lock);
786 struct nfs4_opendata {
788 struct nfs_openargs o_arg;
789 struct nfs_openres o_res;
790 struct nfs_open_confirmargs c_arg;
791 struct nfs_open_confirmres c_res;
792 struct nfs4_string owner_name;
793 struct nfs4_string group_name;
794 struct nfs_fattr f_attr;
796 struct dentry *dentry;
797 struct nfs4_state_owner *owner;
798 struct nfs4_state *state;
800 unsigned long timestamp;
801 unsigned int rpc_done : 1;
807 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
809 p->o_res.f_attr = &p->f_attr;
810 p->o_res.seqid = p->o_arg.seqid;
811 p->c_res.seqid = p->c_arg.seqid;
812 p->o_res.server = p->o_arg.server;
813 nfs_fattr_init(&p->f_attr);
814 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
817 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
818 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
819 const struct iattr *attrs,
822 struct dentry *parent = dget_parent(dentry);
823 struct inode *dir = parent->d_inode;
824 struct nfs_server *server = NFS_SERVER(dir);
825 struct nfs4_opendata *p;
827 p = kzalloc(sizeof(*p), gfp_mask);
830 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
831 if (p->o_arg.seqid == NULL)
833 nfs_sb_active(dentry->d_sb);
834 p->dentry = dget(dentry);
837 atomic_inc(&sp->so_count);
838 p->o_arg.fh = NFS_FH(dir);
839 p->o_arg.open_flags = flags;
840 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
841 p->o_arg.clientid = server->nfs_client->cl_clientid;
842 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
843 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
844 p->o_arg.name = &dentry->d_name;
845 p->o_arg.server = server;
846 p->o_arg.bitmask = server->attr_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, err);
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 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1615 status = _nfs4_proc_open_confirm(data);
1624 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1626 static int _nfs4_proc_open(struct nfs4_opendata *data)
1628 struct inode *dir = data->dir->d_inode;
1629 struct nfs_server *server = NFS_SERVER(dir);
1630 struct nfs_openargs *o_arg = &data->o_arg;
1631 struct nfs_openres *o_res = &data->o_res;
1634 status = nfs4_run_open_task(data, 0);
1635 if (!data->rpc_done)
1638 if (status == -NFS4ERR_BADNAME &&
1639 !(o_arg->open_flags & O_CREAT))
1644 nfs_fattr_map_and_free_names(server, &data->f_attr);
1646 if (o_arg->open_flags & O_CREAT)
1647 update_changeattr(dir, &o_res->cinfo);
1648 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1649 server->caps &= ~NFS_CAP_POSIX_LOCK;
1650 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1651 status = _nfs4_proc_open_confirm(data);
1655 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1656 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1660 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1665 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1666 ret = nfs4_wait_clnt_recover(clp);
1669 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1670 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1672 nfs4_schedule_state_manager(clp);
1678 static int nfs4_recover_expired_lease(struct nfs_server *server)
1680 return nfs4_client_recover_expired_lease(server->nfs_client);
1685 * reclaim state on the server after a network partition.
1686 * Assumes caller holds the appropriate lock
1688 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1690 struct nfs4_opendata *opendata;
1693 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1694 if (IS_ERR(opendata))
1695 return PTR_ERR(opendata);
1696 ret = nfs4_open_recover(opendata, state);
1698 d_drop(ctx->dentry);
1699 nfs4_opendata_put(opendata);
1703 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1705 struct nfs_server *server = NFS_SERVER(state->inode);
1706 struct nfs4_exception exception = { };
1710 err = _nfs4_open_expired(ctx, state);
1714 case -NFS4ERR_GRACE:
1715 case -NFS4ERR_DELAY:
1716 nfs4_handle_exception(server, err, &exception);
1719 } while (exception.retry);
1724 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1726 struct nfs_open_context *ctx;
1729 ctx = nfs4_state_find_open_context(state);
1731 return PTR_ERR(ctx);
1732 ret = nfs4_do_open_expired(ctx, state);
1733 put_nfs_open_context(ctx);
1737 #if defined(CONFIG_NFS_V4_1)
1738 static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *stateid, unsigned int flags)
1740 int status = NFS_OK;
1741 struct nfs_server *server = NFS_SERVER(state->inode);
1743 if (state->flags & flags) {
1744 status = nfs41_test_stateid(server, stateid);
1745 if (status != NFS_OK) {
1746 nfs41_free_stateid(server, stateid);
1747 state->flags &= ~flags;
1753 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1755 int deleg_status, open_status;
1756 int deleg_flags = 1 << NFS_DELEGATED_STATE;
1757 int open_flags = (1 << NFS_O_RDONLY_STATE) | (1 << NFS_O_WRONLY_STATE) | (1 << NFS_O_RDWR_STATE);
1759 deleg_status = nfs41_check_expired_stateid(state, &state->stateid, deleg_flags);
1760 open_status = nfs41_check_expired_stateid(state, &state->open_stateid, open_flags);
1762 if ((deleg_status == NFS_OK) && (open_status == NFS_OK))
1764 return nfs4_open_expired(sp, state);
1769 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1770 * fields corresponding to attributes that were used to store the verifier.
1771 * Make sure we clobber those fields in the later setattr call
1773 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1775 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1776 !(sattr->ia_valid & ATTR_ATIME_SET))
1777 sattr->ia_valid |= ATTR_ATIME;
1779 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1780 !(sattr->ia_valid & ATTR_MTIME_SET))
1781 sattr->ia_valid |= ATTR_MTIME;
1785 * Returns a referenced nfs4_state
1787 static int _nfs4_do_open(struct inode *dir,
1788 struct dentry *dentry,
1791 struct iattr *sattr,
1792 struct rpc_cred *cred,
1793 struct nfs4_state **res,
1794 struct nfs4_threshold **ctx_th)
1796 struct nfs4_state_owner *sp;
1797 struct nfs4_state *state = NULL;
1798 struct nfs_server *server = NFS_SERVER(dir);
1799 struct nfs4_opendata *opendata;
1802 /* Protect against reboot recovery conflicts */
1804 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1806 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1809 status = nfs4_recover_expired_lease(server);
1811 goto err_put_state_owner;
1812 if (dentry->d_inode != NULL)
1813 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1815 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1816 if (opendata == NULL)
1817 goto err_put_state_owner;
1819 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1820 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1821 if (!opendata->f_attr.mdsthreshold)
1822 goto err_opendata_put;
1824 if (dentry->d_inode != NULL)
1825 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1827 status = _nfs4_proc_open(opendata);
1829 goto err_opendata_put;
1831 state = nfs4_opendata_to_nfs4_state(opendata);
1832 status = PTR_ERR(state);
1834 goto err_opendata_put;
1835 if (server->caps & NFS_CAP_POSIX_LOCK)
1836 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1838 if (opendata->o_arg.open_flags & O_EXCL) {
1839 nfs4_exclusive_attrset(opendata, sattr);
1841 nfs_fattr_init(opendata->o_res.f_attr);
1842 status = nfs4_do_setattr(state->inode, cred,
1843 opendata->o_res.f_attr, sattr,
1846 nfs_setattr_update_inode(state->inode, sattr);
1847 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1850 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1851 *ctx_th = opendata->f_attr.mdsthreshold;
1853 kfree(opendata->f_attr.mdsthreshold);
1854 opendata->f_attr.mdsthreshold = NULL;
1856 nfs4_opendata_put(opendata);
1857 nfs4_put_state_owner(sp);
1861 kfree(opendata->f_attr.mdsthreshold);
1862 nfs4_opendata_put(opendata);
1863 err_put_state_owner:
1864 nfs4_put_state_owner(sp);
1871 static struct nfs4_state *nfs4_do_open(struct inode *dir,
1872 struct dentry *dentry,
1875 struct iattr *sattr,
1876 struct rpc_cred *cred,
1877 struct nfs4_threshold **ctx_th)
1879 struct nfs4_exception exception = { };
1880 struct nfs4_state *res;
1884 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1888 /* NOTE: BAD_SEQID means the server and client disagree about the
1889 * book-keeping w.r.t. state-changing operations
1890 * (OPEN/CLOSE/LOCK/LOCKU...)
1891 * It is actually a sign of a bug on the client or on the server.
1893 * If we receive a BAD_SEQID error in the particular case of
1894 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1895 * have unhashed the old state_owner for us, and that we can
1896 * therefore safely retry using a new one. We should still warn
1897 * the user though...
1899 if (status == -NFS4ERR_BAD_SEQID) {
1900 pr_warn_ratelimited("NFS: v4 server %s "
1901 " returned a bad sequence-id error!\n",
1902 NFS_SERVER(dir)->nfs_client->cl_hostname);
1903 exception.retry = 1;
1907 * BAD_STATEID on OPEN means that the server cancelled our
1908 * state before it received the OPEN_CONFIRM.
1909 * Recover by retrying the request as per the discussion
1910 * on Page 181 of RFC3530.
1912 if (status == -NFS4ERR_BAD_STATEID) {
1913 exception.retry = 1;
1916 if (status == -EAGAIN) {
1917 /* We must have found a delegation */
1918 exception.retry = 1;
1921 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1922 status, &exception));
1923 } while (exception.retry);
1927 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1928 struct nfs_fattr *fattr, struct iattr *sattr,
1929 struct nfs4_state *state)
1931 struct nfs_server *server = NFS_SERVER(inode);
1932 struct nfs_setattrargs arg = {
1933 .fh = NFS_FH(inode),
1936 .bitmask = server->attr_bitmask,
1938 struct nfs_setattrres res = {
1942 struct rpc_message msg = {
1943 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1948 unsigned long timestamp = jiffies;
1951 nfs_fattr_init(fattr);
1953 if (state != NULL) {
1954 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
1955 current->files, current->tgid);
1956 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
1958 /* Use that stateid */
1960 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1962 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1963 if (status == 0 && state != NULL)
1964 renew_lease(server, timestamp);
1968 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1969 struct nfs_fattr *fattr, struct iattr *sattr,
1970 struct nfs4_state *state)
1972 struct nfs_server *server = NFS_SERVER(inode);
1973 struct nfs4_exception exception = {
1979 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
1981 case -NFS4ERR_OPENMODE:
1982 if (state && !(state->state & FMODE_WRITE)) {
1984 if (sattr->ia_valid & ATTR_OPEN)
1989 err = nfs4_handle_exception(server, err, &exception);
1990 } while (exception.retry);
1995 struct nfs4_closedata {
1996 struct inode *inode;
1997 struct nfs4_state *state;
1998 struct nfs_closeargs arg;
1999 struct nfs_closeres res;
2000 struct nfs_fattr fattr;
2001 unsigned long timestamp;
2006 static void nfs4_free_closedata(void *data)
2008 struct nfs4_closedata *calldata = data;
2009 struct nfs4_state_owner *sp = calldata->state->owner;
2010 struct super_block *sb = calldata->state->inode->i_sb;
2013 pnfs_roc_release(calldata->state->inode);
2014 nfs4_put_open_state(calldata->state);
2015 nfs_free_seqid(calldata->arg.seqid);
2016 nfs4_put_state_owner(sp);
2017 nfs_sb_deactive(sb);
2021 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2024 spin_lock(&state->owner->so_lock);
2025 if (!(fmode & FMODE_READ))
2026 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2027 if (!(fmode & FMODE_WRITE))
2028 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2029 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2030 spin_unlock(&state->owner->so_lock);
2033 static void nfs4_close_done(struct rpc_task *task, void *data)
2035 struct nfs4_closedata *calldata = data;
2036 struct nfs4_state *state = calldata->state;
2037 struct nfs_server *server = NFS_SERVER(calldata->inode);
2039 dprintk("%s: begin!\n", __func__);
2040 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2042 /* hmm. we are done with the inode, and in the process of freeing
2043 * the state_owner. we keep this around to process errors
2045 switch (task->tk_status) {
2048 pnfs_roc_set_barrier(state->inode,
2049 calldata->roc_barrier);
2050 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2051 renew_lease(server, calldata->timestamp);
2052 nfs4_close_clear_stateid_flags(state,
2053 calldata->arg.fmode);
2055 case -NFS4ERR_STALE_STATEID:
2056 case -NFS4ERR_OLD_STATEID:
2057 case -NFS4ERR_BAD_STATEID:
2058 case -NFS4ERR_EXPIRED:
2059 if (calldata->arg.fmode == 0)
2062 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2063 rpc_restart_call_prepare(task);
2065 nfs_release_seqid(calldata->arg.seqid);
2066 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2067 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2070 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2072 struct nfs4_closedata *calldata = data;
2073 struct nfs4_state *state = calldata->state;
2076 dprintk("%s: begin!\n", __func__);
2077 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2080 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2081 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2082 spin_lock(&state->owner->so_lock);
2083 /* Calculate the change in open mode */
2084 if (state->n_rdwr == 0) {
2085 if (state->n_rdonly == 0) {
2086 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2087 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2088 calldata->arg.fmode &= ~FMODE_READ;
2090 if (state->n_wronly == 0) {
2091 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2092 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2093 calldata->arg.fmode &= ~FMODE_WRITE;
2096 spin_unlock(&state->owner->so_lock);
2099 /* Note: exit _without_ calling nfs4_close_done */
2100 task->tk_action = NULL;
2104 if (calldata->arg.fmode == 0) {
2105 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2106 if (calldata->roc &&
2107 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2108 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2114 nfs_fattr_init(calldata->res.fattr);
2115 calldata->timestamp = jiffies;
2116 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2117 &calldata->arg.seq_args,
2118 &calldata->res.seq_res,
2121 rpc_call_start(task);
2123 dprintk("%s: done!\n", __func__);
2126 static const struct rpc_call_ops nfs4_close_ops = {
2127 .rpc_call_prepare = nfs4_close_prepare,
2128 .rpc_call_done = nfs4_close_done,
2129 .rpc_release = nfs4_free_closedata,
2133 * It is possible for data to be read/written from a mem-mapped file
2134 * after the sys_close call (which hits the vfs layer as a flush).
2135 * This means that we can't safely call nfsv4 close on a file until
2136 * the inode is cleared. This in turn means that we are not good
2137 * NFSv4 citizens - we do not indicate to the server to update the file's
2138 * share state even when we are done with one of the three share
2139 * stateid's in the inode.
2141 * NOTE: Caller must be holding the sp->so_owner semaphore!
2143 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2145 struct nfs_server *server = NFS_SERVER(state->inode);
2146 struct nfs4_closedata *calldata;
2147 struct nfs4_state_owner *sp = state->owner;
2148 struct rpc_task *task;
2149 struct rpc_message msg = {
2150 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2151 .rpc_cred = state->owner->so_cred,
2153 struct rpc_task_setup task_setup_data = {
2154 .rpc_client = server->client,
2155 .rpc_message = &msg,
2156 .callback_ops = &nfs4_close_ops,
2157 .workqueue = nfsiod_workqueue,
2158 .flags = RPC_TASK_ASYNC,
2160 int status = -ENOMEM;
2162 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2163 if (calldata == NULL)
2165 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2166 calldata->inode = state->inode;
2167 calldata->state = state;
2168 calldata->arg.fh = NFS_FH(state->inode);
2169 calldata->arg.stateid = &state->open_stateid;
2170 /* Serialization for the sequence id */
2171 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2172 if (calldata->arg.seqid == NULL)
2173 goto out_free_calldata;
2174 calldata->arg.fmode = 0;
2175 calldata->arg.bitmask = server->cache_consistency_bitmask;
2176 calldata->res.fattr = &calldata->fattr;
2177 calldata->res.seqid = calldata->arg.seqid;
2178 calldata->res.server = server;
2179 calldata->roc = roc;
2180 nfs_sb_active(calldata->inode->i_sb);
2182 msg.rpc_argp = &calldata->arg;
2183 msg.rpc_resp = &calldata->res;
2184 task_setup_data.callback_data = calldata;
2185 task = rpc_run_task(&task_setup_data);
2187 return PTR_ERR(task);
2190 status = rpc_wait_for_completion_task(task);
2197 pnfs_roc_release(state->inode);
2198 nfs4_put_open_state(state);
2199 nfs4_put_state_owner(sp);
2203 static struct inode *
2204 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2206 struct nfs4_state *state;
2208 /* Protect against concurrent sillydeletes */
2209 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2210 ctx->cred, &ctx->mdsthreshold);
2212 return ERR_CAST(state);
2214 return igrab(state->inode);
2217 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2219 if (ctx->state == NULL)
2222 nfs4_close_sync(ctx->state, ctx->mode);
2224 nfs4_close_state(ctx->state, ctx->mode);
2227 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2229 struct nfs4_server_caps_arg args = {
2232 struct nfs4_server_caps_res res = {};
2233 struct rpc_message msg = {
2234 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2240 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2242 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2243 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2244 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2245 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2246 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2247 NFS_CAP_CTIME|NFS_CAP_MTIME);
2248 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2249 server->caps |= NFS_CAP_ACLS;
2250 if (res.has_links != 0)
2251 server->caps |= NFS_CAP_HARDLINKS;
2252 if (res.has_symlinks != 0)
2253 server->caps |= NFS_CAP_SYMLINKS;
2254 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2255 server->caps |= NFS_CAP_FILEID;
2256 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2257 server->caps |= NFS_CAP_MODE;
2258 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2259 server->caps |= NFS_CAP_NLINK;
2260 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2261 server->caps |= NFS_CAP_OWNER;
2262 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2263 server->caps |= NFS_CAP_OWNER_GROUP;
2264 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2265 server->caps |= NFS_CAP_ATIME;
2266 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2267 server->caps |= NFS_CAP_CTIME;
2268 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2269 server->caps |= NFS_CAP_MTIME;
2271 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2272 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2273 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2274 server->acl_bitmask = res.acl_bitmask;
2275 server->fh_expire_type = res.fh_expire_type;
2281 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2283 struct nfs4_exception exception = { };
2286 err = nfs4_handle_exception(server,
2287 _nfs4_server_capabilities(server, fhandle),
2289 } while (exception.retry);
2293 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2294 struct nfs_fsinfo *info)
2296 struct nfs4_lookup_root_arg args = {
2297 .bitmask = nfs4_fattr_bitmap,
2299 struct nfs4_lookup_res res = {
2301 .fattr = info->fattr,
2304 struct rpc_message msg = {
2305 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2310 nfs_fattr_init(info->fattr);
2311 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2314 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2315 struct nfs_fsinfo *info)
2317 struct nfs4_exception exception = { };
2320 err = _nfs4_lookup_root(server, fhandle, info);
2323 case -NFS4ERR_WRONGSEC:
2326 err = nfs4_handle_exception(server, err, &exception);
2328 } while (exception.retry);
2333 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2334 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2336 struct rpc_auth *auth;
2339 auth = rpcauth_create(flavor, server->client);
2344 ret = nfs4_lookup_root(server, fhandle, info);
2349 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2350 struct nfs_fsinfo *info)
2352 int i, len, status = 0;
2353 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2355 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2356 flav_array[len] = RPC_AUTH_NULL;
2359 for (i = 0; i < len; i++) {
2360 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2361 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2366 * -EACCESS could mean that the user doesn't have correct permissions
2367 * to access the mount. It could also mean that we tried to mount
2368 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2369 * existing mount programs don't handle -EACCES very well so it should
2370 * be mapped to -EPERM instead.
2372 if (status == -EACCES)
2378 * get the file handle for the "/" directory on the server
2380 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2381 struct nfs_fsinfo *info)
2383 int minor_version = server->nfs_client->cl_minorversion;
2384 int status = nfs4_lookup_root(server, fhandle, info);
2385 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2387 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2388 * by nfs4_map_errors() as this function exits.
2390 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2392 status = nfs4_server_capabilities(server, fhandle);
2394 status = nfs4_do_fsinfo(server, fhandle, info);
2395 return nfs4_map_errors(status);
2398 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2399 struct nfs_fsinfo *info)
2402 struct nfs_fattr *fattr = info->fattr;
2404 error = nfs4_server_capabilities(server, mntfh);
2406 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2410 error = nfs4_proc_getattr(server, mntfh, fattr);
2412 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2416 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2417 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2418 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2424 * Get locations and (maybe) other attributes of a referral.
2425 * Note that we'll actually follow the referral later when
2426 * we detect fsid mismatch in inode revalidation
2428 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2429 const struct qstr *name, struct nfs_fattr *fattr,
2430 struct nfs_fh *fhandle)
2432 int status = -ENOMEM;
2433 struct page *page = NULL;
2434 struct nfs4_fs_locations *locations = NULL;
2436 page = alloc_page(GFP_KERNEL);
2439 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2440 if (locations == NULL)
2443 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2446 /* Make sure server returned a different fsid for the referral */
2447 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2448 dprintk("%s: server did not return a different fsid for"
2449 " a referral at %s\n", __func__, name->name);
2453 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2454 nfs_fixup_referral_attributes(&locations->fattr);
2456 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2457 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2458 memset(fhandle, 0, sizeof(struct nfs_fh));
2466 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2468 struct nfs4_getattr_arg args = {
2470 .bitmask = server->attr_bitmask,
2472 struct nfs4_getattr_res res = {
2476 struct rpc_message msg = {
2477 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2482 nfs_fattr_init(fattr);
2483 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2486 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2488 struct nfs4_exception exception = { };
2491 err = nfs4_handle_exception(server,
2492 _nfs4_proc_getattr(server, fhandle, fattr),
2494 } while (exception.retry);
2499 * The file is not closed if it is opened due to the a request to change
2500 * the size of the file. The open call will not be needed once the
2501 * VFS layer lookup-intents are implemented.
2503 * Close is called when the inode is destroyed.
2504 * If we haven't opened the file for O_WRONLY, we
2505 * need to in the size_change case to obtain a stateid.
2508 * Because OPEN is always done by name in nfsv4, it is
2509 * possible that we opened a different file by the same
2510 * name. We can recognize this race condition, but we
2511 * can't do anything about it besides returning an error.
2513 * This will be fixed with VFS changes (lookup-intent).
2516 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2517 struct iattr *sattr)
2519 struct inode *inode = dentry->d_inode;
2520 struct rpc_cred *cred = NULL;
2521 struct nfs4_state *state = NULL;
2524 if (pnfs_ld_layoutret_on_setattr(inode))
2525 pnfs_return_layout(inode);
2527 nfs_fattr_init(fattr);
2529 /* Search for an existing open(O_WRITE) file */
2530 if (sattr->ia_valid & ATTR_FILE) {
2531 struct nfs_open_context *ctx;
2533 ctx = nfs_file_open_context(sattr->ia_file);
2540 /* Deal with open(O_TRUNC) */
2541 if (sattr->ia_valid & ATTR_OPEN)
2542 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2544 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2546 nfs_setattr_update_inode(inode, sattr);
2550 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2551 const struct qstr *name, struct nfs_fh *fhandle,
2552 struct nfs_fattr *fattr)
2554 struct nfs_server *server = NFS_SERVER(dir);
2556 struct nfs4_lookup_arg args = {
2557 .bitmask = server->attr_bitmask,
2558 .dir_fh = NFS_FH(dir),
2561 struct nfs4_lookup_res res = {
2566 struct rpc_message msg = {
2567 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2572 nfs_fattr_init(fattr);
2574 dprintk("NFS call lookup %s\n", name->name);
2575 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2576 dprintk("NFS reply lookup: %d\n", status);
2580 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2582 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2583 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2584 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2588 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2589 struct qstr *name, struct nfs_fh *fhandle,
2590 struct nfs_fattr *fattr)
2592 struct nfs4_exception exception = { };
2593 struct rpc_clnt *client = *clnt;
2596 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2598 case -NFS4ERR_BADNAME:
2601 case -NFS4ERR_MOVED:
2602 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2604 case -NFS4ERR_WRONGSEC:
2606 if (client != *clnt)
2609 client = nfs4_create_sec_client(client, dir, name);
2611 return PTR_ERR(client);
2613 exception.retry = 1;
2616 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2618 } while (exception.retry);
2623 else if (client != *clnt)
2624 rpc_shutdown_client(client);
2629 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2630 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2633 struct rpc_clnt *client = NFS_CLIENT(dir);
2635 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2636 if (client != NFS_CLIENT(dir)) {
2637 rpc_shutdown_client(client);
2638 nfs_fixup_secinfo_attributes(fattr);
2644 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2645 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2648 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2650 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2652 rpc_shutdown_client(client);
2653 return ERR_PTR(status);
2658 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2660 struct nfs_server *server = NFS_SERVER(inode);
2661 struct nfs4_accessargs args = {
2662 .fh = NFS_FH(inode),
2663 .bitmask = server->cache_consistency_bitmask,
2665 struct nfs4_accessres res = {
2668 struct rpc_message msg = {
2669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2672 .rpc_cred = entry->cred,
2674 int mode = entry->mask;
2678 * Determine which access bits we want to ask for...
2680 if (mode & MAY_READ)
2681 args.access |= NFS4_ACCESS_READ;
2682 if (S_ISDIR(inode->i_mode)) {
2683 if (mode & MAY_WRITE)
2684 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2685 if (mode & MAY_EXEC)
2686 args.access |= NFS4_ACCESS_LOOKUP;
2688 if (mode & MAY_WRITE)
2689 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2690 if (mode & MAY_EXEC)
2691 args.access |= NFS4_ACCESS_EXECUTE;
2694 res.fattr = nfs_alloc_fattr();
2695 if (res.fattr == NULL)
2698 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2701 if (res.access & NFS4_ACCESS_READ)
2702 entry->mask |= MAY_READ;
2703 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2704 entry->mask |= MAY_WRITE;
2705 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2706 entry->mask |= MAY_EXEC;
2707 nfs_refresh_inode(inode, res.fattr);
2709 nfs_free_fattr(res.fattr);
2713 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2715 struct nfs4_exception exception = { };
2718 err = nfs4_handle_exception(NFS_SERVER(inode),
2719 _nfs4_proc_access(inode, entry),
2721 } while (exception.retry);
2726 * TODO: For the time being, we don't try to get any attributes
2727 * along with any of the zero-copy operations READ, READDIR,
2730 * In the case of the first three, we want to put the GETATTR
2731 * after the read-type operation -- this is because it is hard
2732 * to predict the length of a GETATTR response in v4, and thus
2733 * align the READ data correctly. This means that the GETATTR
2734 * may end up partially falling into the page cache, and we should
2735 * shift it into the 'tail' of the xdr_buf before processing.
2736 * To do this efficiently, we need to know the total length
2737 * of data received, which doesn't seem to be available outside
2740 * In the case of WRITE, we also want to put the GETATTR after
2741 * the operation -- in this case because we want to make sure
2742 * we get the post-operation mtime and size. This means that
2743 * we can't use xdr_encode_pages() as written: we need a variant
2744 * of it which would leave room in the 'tail' iovec.
2746 * Both of these changes to the XDR layer would in fact be quite
2747 * minor, but I decided to leave them for a subsequent patch.
2749 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2750 unsigned int pgbase, unsigned int pglen)
2752 struct nfs4_readlink args = {
2753 .fh = NFS_FH(inode),
2758 struct nfs4_readlink_res res;
2759 struct rpc_message msg = {
2760 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2765 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2768 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2769 unsigned int pgbase, unsigned int pglen)
2771 struct nfs4_exception exception = { };
2774 err = nfs4_handle_exception(NFS_SERVER(inode),
2775 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2777 } while (exception.retry);
2783 * We will need to arrange for the VFS layer to provide an atomic open.
2784 * Until then, this create/open method is prone to inefficiency and race
2785 * conditions due to the lookup, create, and open VFS calls from sys_open()
2786 * placed on the wire.
2788 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2789 * The file will be opened again in the subsequent VFS open call
2790 * (nfs4_proc_file_open).
2792 * The open for read will just hang around to be used by any process that
2793 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2797 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2798 int flags, struct nfs_open_context *ctx)
2800 struct dentry *de = dentry;
2801 struct nfs4_state *state;
2802 struct rpc_cred *cred = NULL;
2811 sattr->ia_mode &= ~current_umask();
2812 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred, NULL);
2814 if (IS_ERR(state)) {
2815 status = PTR_ERR(state);
2818 d_add(dentry, igrab(state->inode));
2819 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2823 nfs4_close_sync(state, fmode);
2828 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2830 struct nfs_server *server = NFS_SERVER(dir);
2831 struct nfs_removeargs args = {
2833 .name.len = name->len,
2834 .name.name = name->name,
2836 struct nfs_removeres res = {
2839 struct rpc_message msg = {
2840 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2846 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2848 update_changeattr(dir, &res.cinfo);
2852 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2854 struct nfs4_exception exception = { };
2857 err = nfs4_handle_exception(NFS_SERVER(dir),
2858 _nfs4_proc_remove(dir, name),
2860 } while (exception.retry);
2864 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2866 struct nfs_server *server = NFS_SERVER(dir);
2867 struct nfs_removeargs *args = msg->rpc_argp;
2868 struct nfs_removeres *res = msg->rpc_resp;
2870 res->server = server;
2871 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2872 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2875 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2877 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2878 &data->args.seq_args,
2882 rpc_call_start(task);
2885 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2887 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2889 if (!nfs4_sequence_done(task, &res->seq_res))
2891 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2893 update_changeattr(dir, &res->cinfo);
2897 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2899 struct nfs_server *server = NFS_SERVER(dir);
2900 struct nfs_renameargs *arg = msg->rpc_argp;
2901 struct nfs_renameres *res = msg->rpc_resp;
2903 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2904 res->server = server;
2905 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2908 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2910 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2911 &data->args.seq_args,
2915 rpc_call_start(task);
2918 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2919 struct inode *new_dir)
2921 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2923 if (!nfs4_sequence_done(task, &res->seq_res))
2925 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2928 update_changeattr(old_dir, &res->old_cinfo);
2929 update_changeattr(new_dir, &res->new_cinfo);
2933 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2934 struct inode *new_dir, struct qstr *new_name)
2936 struct nfs_server *server = NFS_SERVER(old_dir);
2937 struct nfs_renameargs arg = {
2938 .old_dir = NFS_FH(old_dir),
2939 .new_dir = NFS_FH(new_dir),
2940 .old_name = old_name,
2941 .new_name = new_name,
2943 struct nfs_renameres res = {
2946 struct rpc_message msg = {
2947 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2951 int status = -ENOMEM;
2953 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2955 update_changeattr(old_dir, &res.old_cinfo);
2956 update_changeattr(new_dir, &res.new_cinfo);
2961 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2962 struct inode *new_dir, struct qstr *new_name)
2964 struct nfs4_exception exception = { };
2967 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2968 _nfs4_proc_rename(old_dir, old_name,
2971 } while (exception.retry);
2975 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2977 struct nfs_server *server = NFS_SERVER(inode);
2978 struct nfs4_link_arg arg = {
2979 .fh = NFS_FH(inode),
2980 .dir_fh = NFS_FH(dir),
2982 .bitmask = server->attr_bitmask,
2984 struct nfs4_link_res res = {
2987 struct rpc_message msg = {
2988 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2992 int status = -ENOMEM;
2994 res.fattr = nfs_alloc_fattr();
2995 if (res.fattr == NULL)
2998 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3000 update_changeattr(dir, &res.cinfo);
3001 nfs_post_op_update_inode(inode, res.fattr);
3004 nfs_free_fattr(res.fattr);
3008 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3010 struct nfs4_exception exception = { };
3013 err = nfs4_handle_exception(NFS_SERVER(inode),
3014 _nfs4_proc_link(inode, dir, name),
3016 } while (exception.retry);
3020 struct nfs4_createdata {
3021 struct rpc_message msg;
3022 struct nfs4_create_arg arg;
3023 struct nfs4_create_res res;
3025 struct nfs_fattr fattr;
3028 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3029 struct qstr *name, struct iattr *sattr, u32 ftype)
3031 struct nfs4_createdata *data;
3033 data = kzalloc(sizeof(*data), GFP_KERNEL);
3035 struct nfs_server *server = NFS_SERVER(dir);
3037 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3038 data->msg.rpc_argp = &data->arg;
3039 data->msg.rpc_resp = &data->res;
3040 data->arg.dir_fh = NFS_FH(dir);
3041 data->arg.server = server;
3042 data->arg.name = name;
3043 data->arg.attrs = sattr;
3044 data->arg.ftype = ftype;
3045 data->arg.bitmask = server->attr_bitmask;
3046 data->res.server = server;
3047 data->res.fh = &data->fh;
3048 data->res.fattr = &data->fattr;
3049 nfs_fattr_init(data->res.fattr);
3054 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3056 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3057 &data->arg.seq_args, &data->res.seq_res, 1);
3059 update_changeattr(dir, &data->res.dir_cinfo);
3060 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3065 static void nfs4_free_createdata(struct nfs4_createdata *data)
3070 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3071 struct page *page, unsigned int len, struct iattr *sattr)
3073 struct nfs4_createdata *data;
3074 int status = -ENAMETOOLONG;
3076 if (len > NFS4_MAXPATHLEN)
3080 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3084 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3085 data->arg.u.symlink.pages = &page;
3086 data->arg.u.symlink.len = len;
3088 status = nfs4_do_create(dir, dentry, data);
3090 nfs4_free_createdata(data);
3095 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3096 struct page *page, unsigned int len, struct iattr *sattr)
3098 struct nfs4_exception exception = { };
3101 err = nfs4_handle_exception(NFS_SERVER(dir),
3102 _nfs4_proc_symlink(dir, dentry, page,
3105 } while (exception.retry);
3109 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3110 struct iattr *sattr)
3112 struct nfs4_createdata *data;
3113 int status = -ENOMEM;
3115 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3119 status = nfs4_do_create(dir, dentry, data);
3121 nfs4_free_createdata(data);
3126 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3127 struct iattr *sattr)
3129 struct nfs4_exception exception = { };
3132 sattr->ia_mode &= ~current_umask();
3134 err = nfs4_handle_exception(NFS_SERVER(dir),
3135 _nfs4_proc_mkdir(dir, dentry, sattr),
3137 } while (exception.retry);
3141 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3142 u64 cookie, struct page **pages, unsigned int count, int plus)
3144 struct inode *dir = dentry->d_inode;
3145 struct nfs4_readdir_arg args = {
3150 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3153 struct nfs4_readdir_res res;
3154 struct rpc_message msg = {
3155 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3162 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3163 dentry->d_parent->d_name.name,
3164 dentry->d_name.name,
3165 (unsigned long long)cookie);
3166 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3167 res.pgbase = args.pgbase;
3168 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3170 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3171 status += args.pgbase;
3174 nfs_invalidate_atime(dir);
3176 dprintk("%s: returns %d\n", __func__, status);
3180 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3181 u64 cookie, struct page **pages, unsigned int count, int plus)
3183 struct nfs4_exception exception = { };
3186 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3187 _nfs4_proc_readdir(dentry, cred, cookie,
3188 pages, count, plus),
3190 } while (exception.retry);
3194 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3195 struct iattr *sattr, dev_t rdev)
3197 struct nfs4_createdata *data;
3198 int mode = sattr->ia_mode;
3199 int status = -ENOMEM;
3201 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3202 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3204 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3209 data->arg.ftype = NF4FIFO;
3210 else if (S_ISBLK(mode)) {
3211 data->arg.ftype = NF4BLK;
3212 data->arg.u.device.specdata1 = MAJOR(rdev);
3213 data->arg.u.device.specdata2 = MINOR(rdev);
3215 else if (S_ISCHR(mode)) {
3216 data->arg.ftype = NF4CHR;
3217 data->arg.u.device.specdata1 = MAJOR(rdev);
3218 data->arg.u.device.specdata2 = MINOR(rdev);
3221 status = nfs4_do_create(dir, dentry, data);
3223 nfs4_free_createdata(data);
3228 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3229 struct iattr *sattr, dev_t rdev)
3231 struct nfs4_exception exception = { };
3234 sattr->ia_mode &= ~current_umask();
3236 err = nfs4_handle_exception(NFS_SERVER(dir),
3237 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3239 } while (exception.retry);
3243 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3244 struct nfs_fsstat *fsstat)
3246 struct nfs4_statfs_arg args = {
3248 .bitmask = server->attr_bitmask,
3250 struct nfs4_statfs_res res = {
3253 struct rpc_message msg = {
3254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3259 nfs_fattr_init(fsstat->fattr);
3260 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3263 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3265 struct nfs4_exception exception = { };
3268 err = nfs4_handle_exception(server,
3269 _nfs4_proc_statfs(server, fhandle, fsstat),
3271 } while (exception.retry);
3275 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3276 struct nfs_fsinfo *fsinfo)
3278 struct nfs4_fsinfo_arg args = {
3280 .bitmask = server->attr_bitmask,
3282 struct nfs4_fsinfo_res res = {
3285 struct rpc_message msg = {
3286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3291 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3294 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3296 struct nfs4_exception exception = { };
3300 err = nfs4_handle_exception(server,
3301 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3303 } while (exception.retry);
3307 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3309 nfs_fattr_init(fsinfo->fattr);
3310 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3313 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3314 struct nfs_pathconf *pathconf)
3316 struct nfs4_pathconf_arg args = {
3318 .bitmask = server->attr_bitmask,
3320 struct nfs4_pathconf_res res = {
3321 .pathconf = pathconf,
3323 struct rpc_message msg = {
3324 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3329 /* None of the pathconf attributes are mandatory to implement */
3330 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3331 memset(pathconf, 0, sizeof(*pathconf));
3335 nfs_fattr_init(pathconf->fattr);
3336 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3339 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3340 struct nfs_pathconf *pathconf)
3342 struct nfs4_exception exception = { };
3346 err = nfs4_handle_exception(server,
3347 _nfs4_proc_pathconf(server, fhandle, pathconf),
3349 } while (exception.retry);
3353 void __nfs4_read_done_cb(struct nfs_read_data *data)
3355 nfs_invalidate_atime(data->header->inode);
3358 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3360 struct nfs_server *server = NFS_SERVER(data->header->inode);
3362 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3363 rpc_restart_call_prepare(task);
3367 __nfs4_read_done_cb(data);
3368 if (task->tk_status > 0)
3369 renew_lease(server, data->timestamp);
3373 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3376 dprintk("--> %s\n", __func__);
3378 if (!nfs4_sequence_done(task, &data->res.seq_res))
3381 return data->read_done_cb ? data->read_done_cb(task, data) :
3382 nfs4_read_done_cb(task, data);
3385 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3387 data->timestamp = jiffies;
3388 data->read_done_cb = nfs4_read_done_cb;
3389 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3390 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3393 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3395 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3396 &data->args.seq_args,
3400 rpc_call_start(task);
3403 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3405 struct inode *inode = data->header->inode;
3407 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3408 rpc_restart_call_prepare(task);
3411 if (task->tk_status >= 0) {
3412 renew_lease(NFS_SERVER(inode), data->timestamp);
3413 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3418 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3420 if (!nfs4_sequence_done(task, &data->res.seq_res))
3422 return data->write_done_cb ? data->write_done_cb(task, data) :
3423 nfs4_write_done_cb(task, data);
3427 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3429 const struct nfs_pgio_header *hdr = data->header;
3431 /* Don't request attributes for pNFS or O_DIRECT writes */
3432 if (data->ds_clp != NULL || hdr->dreq != NULL)
3434 /* Otherwise, request attributes if and only if we don't hold
3437 return nfs_have_delegation(hdr->inode, FMODE_READ) == 0;
3440 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3442 struct nfs_server *server = NFS_SERVER(data->header->inode);
3444 if (!nfs4_write_need_cache_consistency_data(data)) {
3445 data->args.bitmask = NULL;
3446 data->res.fattr = NULL;
3448 data->args.bitmask = server->cache_consistency_bitmask;
3450 if (!data->write_done_cb)
3451 data->write_done_cb = nfs4_write_done_cb;
3452 data->res.server = server;
3453 data->timestamp = jiffies;
3455 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3456 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3459 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3461 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3462 &data->args.seq_args,
3466 rpc_call_start(task);
3469 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3471 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3472 &data->args.seq_args,
3476 rpc_call_start(task);
3479 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3481 struct inode *inode = data->inode;
3483 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3484 rpc_restart_call_prepare(task);
3490 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3492 if (!nfs4_sequence_done(task, &data->res.seq_res))
3494 return data->commit_done_cb(task, data);
3497 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3499 struct nfs_server *server = NFS_SERVER(data->inode);
3501 if (data->commit_done_cb == NULL)
3502 data->commit_done_cb = nfs4_commit_done_cb;
3503 data->res.server = server;
3504 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3505 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3508 struct nfs4_renewdata {
3509 struct nfs_client *client;
3510 unsigned long timestamp;
3514 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3515 * standalone procedure for queueing an asynchronous RENEW.
3517 static void nfs4_renew_release(void *calldata)
3519 struct nfs4_renewdata *data = calldata;
3520 struct nfs_client *clp = data->client;
3522 if (atomic_read(&clp->cl_count) > 1)
3523 nfs4_schedule_state_renewal(clp);
3524 nfs_put_client(clp);
3528 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3530 struct nfs4_renewdata *data = calldata;
3531 struct nfs_client *clp = data->client;
3532 unsigned long timestamp = data->timestamp;
3534 if (task->tk_status < 0) {
3535 /* Unless we're shutting down, schedule state recovery! */
3536 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3538 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3539 nfs4_schedule_lease_recovery(clp);
3542 nfs4_schedule_path_down_recovery(clp);
3544 do_renew_lease(clp, timestamp);
3547 static const struct rpc_call_ops nfs4_renew_ops = {
3548 .rpc_call_done = nfs4_renew_done,
3549 .rpc_release = nfs4_renew_release,
3552 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3554 struct rpc_message msg = {
3555 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3559 struct nfs4_renewdata *data;
3561 if (renew_flags == 0)
3563 if (!atomic_inc_not_zero(&clp->cl_count))
3565 data = kmalloc(sizeof(*data), GFP_NOFS);
3569 data->timestamp = jiffies;
3570 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3571 &nfs4_renew_ops, data);
3574 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3576 struct rpc_message msg = {
3577 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3581 unsigned long now = jiffies;
3584 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3587 do_renew_lease(clp, now);
3591 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3593 return (server->caps & NFS_CAP_ACLS)
3594 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3595 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3598 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3599 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3602 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3604 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3605 struct page **pages, unsigned int *pgbase)
3607 struct page *newpage, **spages;
3613 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3614 newpage = alloc_page(GFP_KERNEL);
3616 if (newpage == NULL)
3618 memcpy(page_address(newpage), buf, len);
3623 } while (buflen != 0);
3629 __free_page(spages[rc-1]);
3633 struct nfs4_cached_acl {
3639 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3641 struct nfs_inode *nfsi = NFS_I(inode);
3643 spin_lock(&inode->i_lock);
3644 kfree(nfsi->nfs4_acl);
3645 nfsi->nfs4_acl = acl;
3646 spin_unlock(&inode->i_lock);
3649 static void nfs4_zap_acl_attr(struct inode *inode)
3651 nfs4_set_cached_acl(inode, NULL);
3654 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3656 struct nfs_inode *nfsi = NFS_I(inode);
3657 struct nfs4_cached_acl *acl;
3660 spin_lock(&inode->i_lock);
3661 acl = nfsi->nfs4_acl;
3664 if (buf == NULL) /* user is just asking for length */
3666 if (acl->cached == 0)
3668 ret = -ERANGE; /* see getxattr(2) man page */
3669 if (acl->len > buflen)
3671 memcpy(buf, acl->data, acl->len);
3675 spin_unlock(&inode->i_lock);
3679 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3681 struct nfs4_cached_acl *acl;
3683 if (pages && acl_len <= PAGE_SIZE) {
3684 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3688 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3690 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3697 nfs4_set_cached_acl(inode, acl);
3701 * The getxattr API returns the required buffer length when called with a
3702 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3703 * the required buf. On a NULL buf, we send a page of data to the server
3704 * guessing that the ACL request can be serviced by a page. If so, we cache
3705 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3706 * the cache. If not so, we throw away the page, and cache the required
3707 * length. The next getxattr call will then produce another round trip to
3708 * the server, this time with the input buf of the required size.
3710 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3712 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3713 struct nfs_getaclargs args = {
3714 .fh = NFS_FH(inode),
3718 struct nfs_getaclres res = {
3721 struct rpc_message msg = {
3722 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3726 int ret = -ENOMEM, npages, i, acl_len = 0;
3728 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3729 /* As long as we're doing a round trip to the server anyway,
3730 * let's be prepared for a page of acl data. */
3734 /* Add an extra page to handle the bitmap returned */
3737 for (i = 0; i < npages; i++) {
3738 pages[i] = alloc_page(GFP_KERNEL);
3743 /* for decoding across pages */
3744 res.acl_scratch = alloc_page(GFP_KERNEL);
3745 if (!res.acl_scratch)
3748 args.acl_len = npages * PAGE_SIZE;
3749 args.acl_pgbase = 0;
3751 /* Let decode_getfacl know not to fail if the ACL data is larger than
3752 * the page we send as a guess */
3754 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3756 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3757 __func__, buf, buflen, npages, args.acl_len);
3758 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3759 &msg, &args.seq_args, &res.seq_res, 0);
3763 acl_len = res.acl_len - res.acl_data_offset;
3764 if (acl_len > args.acl_len)
3765 nfs4_write_cached_acl(inode, NULL, 0, acl_len);
3767 nfs4_write_cached_acl(inode, pages, res.acl_data_offset,
3771 if (acl_len > buflen)
3773 _copy_from_pages(buf, pages, res.acl_data_offset,
3778 for (i = 0; i < npages; i++)
3780 __free_page(pages[i]);
3781 if (res.acl_scratch)
3782 __free_page(res.acl_scratch);
3786 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3788 struct nfs4_exception exception = { };
3791 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3794 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3795 } while (exception.retry);
3799 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3801 struct nfs_server *server = NFS_SERVER(inode);
3804 if (!nfs4_server_supports_acls(server))
3806 ret = nfs_revalidate_inode(server, inode);
3809 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3810 nfs_zap_acl_cache(inode);
3811 ret = nfs4_read_cached_acl(inode, buf, buflen);
3813 /* -ENOENT is returned if there is no ACL or if there is an ACL
3814 * but no cached acl data, just the acl length */
3816 return nfs4_get_acl_uncached(inode, buf, buflen);
3819 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3821 struct nfs_server *server = NFS_SERVER(inode);
3822 struct page *pages[NFS4ACL_MAXPAGES];
3823 struct nfs_setaclargs arg = {
3824 .fh = NFS_FH(inode),
3828 struct nfs_setaclres res;
3829 struct rpc_message msg = {
3830 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3836 if (!nfs4_server_supports_acls(server))
3838 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3841 nfs_inode_return_delegation(inode);
3842 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3845 * Free each page after tx, so the only ref left is
3846 * held by the network stack
3849 put_page(pages[i-1]);
3852 * Acl update can result in inode attribute update.
3853 * so mark the attribute cache invalid.
3855 spin_lock(&inode->i_lock);
3856 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3857 spin_unlock(&inode->i_lock);
3858 nfs_access_zap_cache(inode);
3859 nfs_zap_acl_cache(inode);
3863 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3865 struct nfs4_exception exception = { };
3868 err = nfs4_handle_exception(NFS_SERVER(inode),
3869 __nfs4_proc_set_acl(inode, buf, buflen),
3871 } while (exception.retry);
3876 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3878 struct nfs_client *clp = server->nfs_client;
3880 if (task->tk_status >= 0)
3882 switch(task->tk_status) {
3883 case -NFS4ERR_DELEG_REVOKED:
3884 case -NFS4ERR_ADMIN_REVOKED:
3885 case -NFS4ERR_BAD_STATEID:
3888 nfs_remove_bad_delegation(state->inode);
3889 case -NFS4ERR_OPENMODE:
3892 nfs4_schedule_stateid_recovery(server, state);
3893 goto wait_on_recovery;
3894 case -NFS4ERR_EXPIRED:
3896 nfs4_schedule_stateid_recovery(server, state);
3897 case -NFS4ERR_STALE_STATEID:
3898 case -NFS4ERR_STALE_CLIENTID:
3899 nfs4_schedule_lease_recovery(clp);
3900 goto wait_on_recovery;
3901 #if defined(CONFIG_NFS_V4_1)
3902 case -NFS4ERR_BADSESSION:
3903 case -NFS4ERR_BADSLOT:
3904 case -NFS4ERR_BAD_HIGH_SLOT:
3905 case -NFS4ERR_DEADSESSION:
3906 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3907 case -NFS4ERR_SEQ_FALSE_RETRY:
3908 case -NFS4ERR_SEQ_MISORDERED:
3909 dprintk("%s ERROR %d, Reset session\n", __func__,
3911 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
3912 task->tk_status = 0;
3914 #endif /* CONFIG_NFS_V4_1 */
3915 case -NFS4ERR_DELAY:
3916 nfs_inc_server_stats(server, NFSIOS_DELAY);
3917 case -NFS4ERR_GRACE:
3919 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3920 task->tk_status = 0;
3922 case -NFS4ERR_RETRY_UNCACHED_REP:
3923 case -NFS4ERR_OLD_STATEID:
3924 task->tk_status = 0;
3927 task->tk_status = nfs4_map_errors(task->tk_status);
3930 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3931 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3932 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3933 task->tk_status = 0;
3937 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3938 nfs4_verifier *bootverf)
3942 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
3943 /* An impossible timestamp guarantees this value
3944 * will never match a generated boot time. */
3946 verf[1] = (__be32)(NSEC_PER_SEC + 1);
3948 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
3949 verf[0] = (__be32)nn->boot_time.tv_sec;
3950 verf[1] = (__be32)nn->boot_time.tv_nsec;
3952 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3955 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3956 unsigned short port, struct rpc_cred *cred,
3957 struct nfs4_setclientid_res *res)
3959 nfs4_verifier sc_verifier;
3960 struct nfs4_setclientid setclientid = {
3961 .sc_verifier = &sc_verifier,
3963 .sc_cb_ident = clp->cl_cb_ident,
3965 struct rpc_message msg = {
3966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3967 .rpc_argp = &setclientid,
3974 nfs4_init_boot_verifier(clp, &sc_verifier);
3978 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3979 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3981 rpc_peeraddr2str(clp->cl_rpcclient,
3983 rpc_peeraddr2str(clp->cl_rpcclient,
3985 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3986 clp->cl_id_uniquifier);
3987 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3988 sizeof(setclientid.sc_netid),
3989 rpc_peeraddr2str(clp->cl_rpcclient,
3990 RPC_DISPLAY_NETID));
3991 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3992 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3993 clp->cl_ipaddr, port >> 8, port & 255);
3996 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3997 if (status != -NFS4ERR_CLID_INUSE)
4000 ++clp->cl_id_uniquifier;
4004 ssleep(clp->cl_lease_time / HZ + 1);
4009 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4010 struct nfs4_setclientid_res *arg,
4011 struct rpc_cred *cred)
4013 struct nfs_fsinfo fsinfo;
4014 struct rpc_message msg = {
4015 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4017 .rpc_resp = &fsinfo,
4024 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4026 spin_lock(&clp->cl_lock);
4027 clp->cl_lease_time = fsinfo.lease_time * HZ;
4028 clp->cl_last_renewal = now;
4029 spin_unlock(&clp->cl_lock);
4034 struct nfs4_delegreturndata {
4035 struct nfs4_delegreturnargs args;
4036 struct nfs4_delegreturnres res;
4038 nfs4_stateid stateid;
4039 unsigned long timestamp;
4040 struct nfs_fattr fattr;
4044 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4046 struct nfs4_delegreturndata *data = calldata;
4048 if (!nfs4_sequence_done(task, &data->res.seq_res))
4051 switch (task->tk_status) {
4052 case -NFS4ERR_STALE_STATEID:
4053 case -NFS4ERR_EXPIRED:
4055 renew_lease(data->res.server, data->timestamp);
4058 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4060 rpc_restart_call_prepare(task);
4064 data->rpc_status = task->tk_status;
4067 static void nfs4_delegreturn_release(void *calldata)
4072 #if defined(CONFIG_NFS_V4_1)
4073 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4075 struct nfs4_delegreturndata *d_data;
4077 d_data = (struct nfs4_delegreturndata *)data;
4079 if (nfs4_setup_sequence(d_data->res.server,
4080 &d_data->args.seq_args,
4081 &d_data->res.seq_res, task))
4083 rpc_call_start(task);
4085 #endif /* CONFIG_NFS_V4_1 */
4087 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4088 #if defined(CONFIG_NFS_V4_1)
4089 .rpc_call_prepare = nfs4_delegreturn_prepare,
4090 #endif /* CONFIG_NFS_V4_1 */
4091 .rpc_call_done = nfs4_delegreturn_done,
4092 .rpc_release = nfs4_delegreturn_release,
4095 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4097 struct nfs4_delegreturndata *data;
4098 struct nfs_server *server = NFS_SERVER(inode);
4099 struct rpc_task *task;
4100 struct rpc_message msg = {
4101 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4104 struct rpc_task_setup task_setup_data = {
4105 .rpc_client = server->client,
4106 .rpc_message = &msg,
4107 .callback_ops = &nfs4_delegreturn_ops,
4108 .flags = RPC_TASK_ASYNC,
4112 data = kzalloc(sizeof(*data), GFP_NOFS);
4115 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4116 data->args.fhandle = &data->fh;
4117 data->args.stateid = &data->stateid;
4118 data->args.bitmask = server->cache_consistency_bitmask;
4119 nfs_copy_fh(&data->fh, NFS_FH(inode));
4120 nfs4_stateid_copy(&data->stateid, stateid);
4121 data->res.fattr = &data->fattr;
4122 data->res.server = server;
4123 nfs_fattr_init(data->res.fattr);
4124 data->timestamp = jiffies;
4125 data->rpc_status = 0;
4127 task_setup_data.callback_data = data;
4128 msg.rpc_argp = &data->args;
4129 msg.rpc_resp = &data->res;
4130 task = rpc_run_task(&task_setup_data);
4132 return PTR_ERR(task);
4135 status = nfs4_wait_for_completion_rpc_task(task);
4138 status = data->rpc_status;
4140 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4142 nfs_refresh_inode(inode, &data->fattr);
4148 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4150 struct nfs_server *server = NFS_SERVER(inode);
4151 struct nfs4_exception exception = { };
4154 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4156 case -NFS4ERR_STALE_STATEID:
4157 case -NFS4ERR_EXPIRED:
4161 err = nfs4_handle_exception(server, err, &exception);
4162 } while (exception.retry);
4166 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4167 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4170 * sleep, with exponential backoff, and retry the LOCK operation.
4172 static unsigned long
4173 nfs4_set_lock_task_retry(unsigned long timeout)
4175 freezable_schedule_timeout_killable(timeout);
4177 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4178 return NFS4_LOCK_MAXTIMEOUT;
4182 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4184 struct inode *inode = state->inode;
4185 struct nfs_server *server = NFS_SERVER(inode);
4186 struct nfs_client *clp = server->nfs_client;
4187 struct nfs_lockt_args arg = {
4188 .fh = NFS_FH(inode),
4191 struct nfs_lockt_res res = {
4194 struct rpc_message msg = {
4195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4198 .rpc_cred = state->owner->so_cred,
4200 struct nfs4_lock_state *lsp;
4203 arg.lock_owner.clientid = clp->cl_clientid;
4204 status = nfs4_set_lock_state(state, request);
4207 lsp = request->fl_u.nfs4_fl.owner;
4208 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4209 arg.lock_owner.s_dev = server->s_dev;
4210 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4213 request->fl_type = F_UNLCK;
4215 case -NFS4ERR_DENIED:
4218 request->fl_ops->fl_release_private(request);
4223 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4225 struct nfs4_exception exception = { };
4229 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4230 _nfs4_proc_getlk(state, cmd, request),
4232 } while (exception.retry);
4236 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4239 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4241 res = posix_lock_file_wait(file, fl);
4244 res = flock_lock_file_wait(file, fl);
4252 struct nfs4_unlockdata {
4253 struct nfs_locku_args arg;
4254 struct nfs_locku_res res;
4255 struct nfs4_lock_state *lsp;
4256 struct nfs_open_context *ctx;
4257 struct file_lock fl;
4258 const struct nfs_server *server;
4259 unsigned long timestamp;
4262 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4263 struct nfs_open_context *ctx,
4264 struct nfs4_lock_state *lsp,
4265 struct nfs_seqid *seqid)
4267 struct nfs4_unlockdata *p;
4268 struct inode *inode = lsp->ls_state->inode;
4270 p = kzalloc(sizeof(*p), GFP_NOFS);
4273 p->arg.fh = NFS_FH(inode);
4275 p->arg.seqid = seqid;
4276 p->res.seqid = seqid;
4277 p->arg.stateid = &lsp->ls_stateid;
4279 atomic_inc(&lsp->ls_count);
4280 /* Ensure we don't close file until we're done freeing locks! */
4281 p->ctx = get_nfs_open_context(ctx);
4282 memcpy(&p->fl, fl, sizeof(p->fl));
4283 p->server = NFS_SERVER(inode);
4287 static void nfs4_locku_release_calldata(void *data)
4289 struct nfs4_unlockdata *calldata = data;
4290 nfs_free_seqid(calldata->arg.seqid);
4291 nfs4_put_lock_state(calldata->lsp);
4292 put_nfs_open_context(calldata->ctx);
4296 static void nfs4_locku_done(struct rpc_task *task, void *data)
4298 struct nfs4_unlockdata *calldata = data;
4300 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4302 switch (task->tk_status) {
4304 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4305 &calldata->res.stateid);
4306 renew_lease(calldata->server, calldata->timestamp);
4308 case -NFS4ERR_BAD_STATEID:
4309 case -NFS4ERR_OLD_STATEID:
4310 case -NFS4ERR_STALE_STATEID:
4311 case -NFS4ERR_EXPIRED:
4314 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4315 rpc_restart_call_prepare(task);
4319 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4321 struct nfs4_unlockdata *calldata = data;
4323 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4325 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4326 /* Note: exit _without_ running nfs4_locku_done */
4327 task->tk_action = NULL;
4330 calldata->timestamp = jiffies;
4331 if (nfs4_setup_sequence(calldata->server,
4332 &calldata->arg.seq_args,
4333 &calldata->res.seq_res, task))
4335 rpc_call_start(task);
4338 static const struct rpc_call_ops nfs4_locku_ops = {
4339 .rpc_call_prepare = nfs4_locku_prepare,
4340 .rpc_call_done = nfs4_locku_done,
4341 .rpc_release = nfs4_locku_release_calldata,
4344 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4345 struct nfs_open_context *ctx,
4346 struct nfs4_lock_state *lsp,
4347 struct nfs_seqid *seqid)
4349 struct nfs4_unlockdata *data;
4350 struct rpc_message msg = {
4351 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4352 .rpc_cred = ctx->cred,
4354 struct rpc_task_setup task_setup_data = {
4355 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4356 .rpc_message = &msg,
4357 .callback_ops = &nfs4_locku_ops,
4358 .workqueue = nfsiod_workqueue,
4359 .flags = RPC_TASK_ASYNC,
4362 /* Ensure this is an unlock - when canceling a lock, the
4363 * canceled lock is passed in, and it won't be an unlock.
4365 fl->fl_type = F_UNLCK;
4367 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4369 nfs_free_seqid(seqid);
4370 return ERR_PTR(-ENOMEM);
4373 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4374 msg.rpc_argp = &data->arg;
4375 msg.rpc_resp = &data->res;
4376 task_setup_data.callback_data = data;
4377 return rpc_run_task(&task_setup_data);
4380 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4382 struct nfs_inode *nfsi = NFS_I(state->inode);
4383 struct nfs_seqid *seqid;
4384 struct nfs4_lock_state *lsp;
4385 struct rpc_task *task;
4387 unsigned char fl_flags = request->fl_flags;
4389 status = nfs4_set_lock_state(state, request);
4390 /* Unlock _before_ we do the RPC call */
4391 request->fl_flags |= FL_EXISTS;
4392 down_read(&nfsi->rwsem);
4393 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4394 up_read(&nfsi->rwsem);
4397 up_read(&nfsi->rwsem);
4400 /* Is this a delegated lock? */
4401 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4403 lsp = request->fl_u.nfs4_fl.owner;
4404 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4408 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4409 status = PTR_ERR(task);
4412 status = nfs4_wait_for_completion_rpc_task(task);
4415 request->fl_flags = fl_flags;
4419 struct nfs4_lockdata {
4420 struct nfs_lock_args arg;
4421 struct nfs_lock_res res;
4422 struct nfs4_lock_state *lsp;
4423 struct nfs_open_context *ctx;
4424 struct file_lock fl;
4425 unsigned long timestamp;
4428 struct nfs_server *server;
4431 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4432 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4435 struct nfs4_lockdata *p;
4436 struct inode *inode = lsp->ls_state->inode;
4437 struct nfs_server *server = NFS_SERVER(inode);
4439 p = kzalloc(sizeof(*p), gfp_mask);
4443 p->arg.fh = NFS_FH(inode);
4445 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4446 if (p->arg.open_seqid == NULL)
4448 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4449 if (p->arg.lock_seqid == NULL)
4450 goto out_free_seqid;
4451 p->arg.lock_stateid = &lsp->ls_stateid;
4452 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4453 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4454 p->arg.lock_owner.s_dev = server->s_dev;
4455 p->res.lock_seqid = p->arg.lock_seqid;
4458 atomic_inc(&lsp->ls_count);
4459 p->ctx = get_nfs_open_context(ctx);
4460 memcpy(&p->fl, fl, sizeof(p->fl));
4463 nfs_free_seqid(p->arg.open_seqid);
4469 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4471 struct nfs4_lockdata *data = calldata;
4472 struct nfs4_state *state = data->lsp->ls_state;
4474 dprintk("%s: begin!\n", __func__);
4475 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4477 /* Do we need to do an open_to_lock_owner? */
4478 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4479 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4481 data->arg.open_stateid = &state->stateid;
4482 data->arg.new_lock_owner = 1;
4483 data->res.open_seqid = data->arg.open_seqid;
4485 data->arg.new_lock_owner = 0;
4486 data->timestamp = jiffies;
4487 if (nfs4_setup_sequence(data->server,
4488 &data->arg.seq_args,
4489 &data->res.seq_res, task))
4491 rpc_call_start(task);
4492 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4495 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4497 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4498 nfs4_lock_prepare(task, calldata);
4501 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4503 struct nfs4_lockdata *data = calldata;
4505 dprintk("%s: begin!\n", __func__);
4507 if (!nfs4_sequence_done(task, &data->res.seq_res))
4510 data->rpc_status = task->tk_status;
4511 if (data->arg.new_lock_owner != 0) {
4512 if (data->rpc_status == 0)
4513 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4517 if (data->rpc_status == 0) {
4518 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4519 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4520 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4523 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4526 static void nfs4_lock_release(void *calldata)
4528 struct nfs4_lockdata *data = calldata;
4530 dprintk("%s: begin!\n", __func__);
4531 nfs_free_seqid(data->arg.open_seqid);
4532 if (data->cancelled != 0) {
4533 struct rpc_task *task;
4534 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4535 data->arg.lock_seqid);
4537 rpc_put_task_async(task);
4538 dprintk("%s: cancelling lock!\n", __func__);
4540 nfs_free_seqid(data->arg.lock_seqid);
4541 nfs4_put_lock_state(data->lsp);
4542 put_nfs_open_context(data->ctx);
4544 dprintk("%s: done!\n", __func__);
4547 static const struct rpc_call_ops nfs4_lock_ops = {
4548 .rpc_call_prepare = nfs4_lock_prepare,
4549 .rpc_call_done = nfs4_lock_done,
4550 .rpc_release = nfs4_lock_release,
4553 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4554 .rpc_call_prepare = nfs4_recover_lock_prepare,
4555 .rpc_call_done = nfs4_lock_done,
4556 .rpc_release = nfs4_lock_release,
4559 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4562 case -NFS4ERR_ADMIN_REVOKED:
4563 case -NFS4ERR_BAD_STATEID:
4564 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4565 if (new_lock_owner != 0 ||
4566 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4567 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4569 case -NFS4ERR_STALE_STATEID:
4570 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4571 case -NFS4ERR_EXPIRED:
4572 nfs4_schedule_lease_recovery(server->nfs_client);
4576 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4578 struct nfs4_lockdata *data;
4579 struct rpc_task *task;
4580 struct rpc_message msg = {
4581 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4582 .rpc_cred = state->owner->so_cred,
4584 struct rpc_task_setup task_setup_data = {
4585 .rpc_client = NFS_CLIENT(state->inode),
4586 .rpc_message = &msg,
4587 .callback_ops = &nfs4_lock_ops,
4588 .workqueue = nfsiod_workqueue,
4589 .flags = RPC_TASK_ASYNC,
4593 dprintk("%s: begin!\n", __func__);
4594 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4595 fl->fl_u.nfs4_fl.owner,
4596 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4600 data->arg.block = 1;
4601 if (recovery_type > NFS_LOCK_NEW) {
4602 if (recovery_type == NFS_LOCK_RECLAIM)
4603 data->arg.reclaim = NFS_LOCK_RECLAIM;
4604 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4606 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4607 msg.rpc_argp = &data->arg;
4608 msg.rpc_resp = &data->res;
4609 task_setup_data.callback_data = data;
4610 task = rpc_run_task(&task_setup_data);
4612 return PTR_ERR(task);
4613 ret = nfs4_wait_for_completion_rpc_task(task);
4615 ret = data->rpc_status;
4617 nfs4_handle_setlk_error(data->server, data->lsp,
4618 data->arg.new_lock_owner, ret);
4620 data->cancelled = 1;
4622 dprintk("%s: done, ret = %d!\n", __func__, ret);
4626 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4628 struct nfs_server *server = NFS_SERVER(state->inode);
4629 struct nfs4_exception exception = {
4630 .inode = state->inode,
4635 /* Cache the lock if possible... */
4636 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4638 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4639 if (err != -NFS4ERR_DELAY)
4641 nfs4_handle_exception(server, err, &exception);
4642 } while (exception.retry);
4646 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4648 struct nfs_server *server = NFS_SERVER(state->inode);
4649 struct nfs4_exception exception = {
4650 .inode = state->inode,
4654 err = nfs4_set_lock_state(state, request);
4658 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4660 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4664 case -NFS4ERR_GRACE:
4665 case -NFS4ERR_DELAY:
4666 nfs4_handle_exception(server, err, &exception);
4669 } while (exception.retry);
4674 #if defined(CONFIG_NFS_V4_1)
4675 static int nfs41_check_expired_locks(struct nfs4_state *state)
4677 int status, ret = NFS_OK;
4678 struct nfs4_lock_state *lsp;
4679 struct nfs_server *server = NFS_SERVER(state->inode);
4681 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4682 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4683 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4684 if (status != NFS_OK) {
4685 nfs41_free_stateid(server, &lsp->ls_stateid);
4686 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4695 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4697 int status = NFS_OK;
4699 if (test_bit(LK_STATE_IN_USE, &state->flags))
4700 status = nfs41_check_expired_locks(state);
4701 if (status == NFS_OK)
4703 return nfs4_lock_expired(state, request);
4707 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4709 struct nfs_inode *nfsi = NFS_I(state->inode);
4710 unsigned char fl_flags = request->fl_flags;
4711 int status = -ENOLCK;
4713 if ((fl_flags & FL_POSIX) &&
4714 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4716 /* Is this a delegated open? */
4717 status = nfs4_set_lock_state(state, request);
4720 request->fl_flags |= FL_ACCESS;
4721 status = do_vfs_lock(request->fl_file, request);
4724 down_read(&nfsi->rwsem);
4725 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4726 /* Yes: cache locks! */
4727 /* ...but avoid races with delegation recall... */
4728 request->fl_flags = fl_flags & ~FL_SLEEP;
4729 status = do_vfs_lock(request->fl_file, request);
4732 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4735 /* Note: we always want to sleep here! */
4736 request->fl_flags = fl_flags | FL_SLEEP;
4737 if (do_vfs_lock(request->fl_file, request) < 0)
4738 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4739 "manager!\n", __func__);
4741 up_read(&nfsi->rwsem);
4743 request->fl_flags = fl_flags;
4747 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4749 struct nfs4_exception exception = {
4751 .inode = state->inode,
4756 err = _nfs4_proc_setlk(state, cmd, request);
4757 if (err == -NFS4ERR_DENIED)
4759 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4761 } while (exception.retry);
4766 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4768 struct nfs_open_context *ctx;
4769 struct nfs4_state *state;
4770 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4773 /* verify open state */
4774 ctx = nfs_file_open_context(filp);
4777 if (request->fl_start < 0 || request->fl_end < 0)
4780 if (IS_GETLK(cmd)) {
4782 return nfs4_proc_getlk(state, F_GETLK, request);
4786 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4789 if (request->fl_type == F_UNLCK) {
4791 return nfs4_proc_unlck(state, cmd, request);
4798 * Don't rely on the VFS having checked the file open mode,
4799 * since it won't do this for flock() locks.
4801 switch (request->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) {
4803 if (!(filp->f_mode & FMODE_READ))
4807 if (!(filp->f_mode & FMODE_WRITE))
4812 status = nfs4_proc_setlk(state, cmd, request);
4813 if ((status != -EAGAIN) || IS_SETLK(cmd))
4815 timeout = nfs4_set_lock_task_retry(timeout);
4816 status = -ERESTARTSYS;
4819 } while(status < 0);
4823 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4825 struct nfs_server *server = NFS_SERVER(state->inode);
4826 struct nfs4_exception exception = { };
4829 err = nfs4_set_lock_state(state, fl);
4833 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4836 printk(KERN_ERR "NFS: %s: unhandled error "
4837 "%d.\n", __func__, err);
4841 case -NFS4ERR_EXPIRED:
4842 nfs4_schedule_stateid_recovery(server, state);
4843 case -NFS4ERR_STALE_CLIENTID:
4844 case -NFS4ERR_STALE_STATEID:
4845 nfs4_schedule_lease_recovery(server->nfs_client);
4847 case -NFS4ERR_BADSESSION:
4848 case -NFS4ERR_BADSLOT:
4849 case -NFS4ERR_BAD_HIGH_SLOT:
4850 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4851 case -NFS4ERR_DEADSESSION:
4852 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
4856 * The show must go on: exit, but mark the
4857 * stateid as needing recovery.
4859 case -NFS4ERR_DELEG_REVOKED:
4860 case -NFS4ERR_ADMIN_REVOKED:
4861 case -NFS4ERR_BAD_STATEID:
4862 case -NFS4ERR_OPENMODE:
4863 nfs4_schedule_stateid_recovery(server, state);
4868 * User RPCSEC_GSS context has expired.
4869 * We cannot recover this stateid now, so
4870 * skip it and allow recovery thread to
4876 case -NFS4ERR_DENIED:
4877 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4880 case -NFS4ERR_DELAY:
4883 err = nfs4_handle_exception(server, err, &exception);
4884 } while (exception.retry);
4889 struct nfs_release_lockowner_data {
4890 struct nfs4_lock_state *lsp;
4891 struct nfs_server *server;
4892 struct nfs_release_lockowner_args args;
4895 static void nfs4_release_lockowner_release(void *calldata)
4897 struct nfs_release_lockowner_data *data = calldata;
4898 nfs4_free_lock_state(data->server, data->lsp);
4902 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
4903 .rpc_release = nfs4_release_lockowner_release,
4906 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
4908 struct nfs_server *server = lsp->ls_state->owner->so_server;
4909 struct nfs_release_lockowner_data *data;
4910 struct rpc_message msg = {
4911 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4914 if (server->nfs_client->cl_mvops->minor_version != 0)
4916 data = kmalloc(sizeof(*data), GFP_NOFS);
4920 data->server = server;
4921 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4922 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4923 data->args.lock_owner.s_dev = server->s_dev;
4924 msg.rpc_argp = &data->args;
4925 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4929 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4931 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4932 const void *buf, size_t buflen,
4933 int flags, int type)
4935 if (strcmp(key, "") != 0)
4938 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4941 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4942 void *buf, size_t buflen, int type)
4944 if (strcmp(key, "") != 0)
4947 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4950 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4951 size_t list_len, const char *name,
4952 size_t name_len, int type)
4954 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4956 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4959 if (list && len <= list_len)
4960 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4965 * nfs_fhget will use either the mounted_on_fileid or the fileid
4967 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4969 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4970 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4971 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4972 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
4975 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4976 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
4977 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4981 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
4982 const struct qstr *name,
4983 struct nfs4_fs_locations *fs_locations,
4986 struct nfs_server *server = NFS_SERVER(dir);
4988 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4990 struct nfs4_fs_locations_arg args = {
4991 .dir_fh = NFS_FH(dir),
4996 struct nfs4_fs_locations_res res = {
4997 .fs_locations = fs_locations,
4999 struct rpc_message msg = {
5000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5006 dprintk("%s: start\n", __func__);
5008 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5009 * is not supported */
5010 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5011 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5013 bitmask[0] |= FATTR4_WORD0_FILEID;
5015 nfs_fattr_init(&fs_locations->fattr);
5016 fs_locations->server = server;
5017 fs_locations->nlocations = 0;
5018 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5019 dprintk("%s: returned status = %d\n", __func__, status);
5023 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5024 const struct qstr *name,
5025 struct nfs4_fs_locations *fs_locations,
5028 struct nfs4_exception exception = { };
5031 err = nfs4_handle_exception(NFS_SERVER(dir),
5032 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5034 } while (exception.retry);
5038 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5041 struct nfs4_secinfo_arg args = {
5042 .dir_fh = NFS_FH(dir),
5045 struct nfs4_secinfo_res res = {
5048 struct rpc_message msg = {
5049 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5054 dprintk("NFS call secinfo %s\n", name->name);
5055 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5056 dprintk("NFS reply secinfo: %d\n", status);
5060 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5061 struct nfs4_secinfo_flavors *flavors)
5063 struct nfs4_exception exception = { };
5066 err = nfs4_handle_exception(NFS_SERVER(dir),
5067 _nfs4_proc_secinfo(dir, name, flavors),
5069 } while (exception.retry);
5073 #ifdef CONFIG_NFS_V4_1
5075 * Check the exchange flags returned by the server for invalid flags, having
5076 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5079 static int nfs4_check_cl_exchange_flags(u32 flags)
5081 if (flags & ~EXCHGID4_FLAG_MASK_R)
5083 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5084 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5086 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5090 return -NFS4ERR_INVAL;
5094 nfs41_same_server_scope(struct nfs41_server_scope *a,
5095 struct nfs41_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_bind_conn_to_session()
5107 * The 4.1 client currently uses the same TCP connection for the
5108 * fore and backchannel.
5110 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5113 struct nfs41_bind_conn_to_session_res res;
5114 struct rpc_message msg = {
5116 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5122 dprintk("--> %s\n", __func__);
5123 BUG_ON(clp == NULL);
5125 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5126 if (unlikely(res.session == NULL)) {
5131 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5133 if (memcmp(res.session->sess_id.data,
5134 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5135 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5139 if (res.dir != NFS4_CDFS4_BOTH) {
5140 dprintk("NFS: %s: Unexpected direction from server\n",
5145 if (res.use_conn_in_rdma_mode) {
5146 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5155 dprintk("<-- %s status= %d\n", __func__, status);
5160 * nfs4_proc_exchange_id()
5162 * Since the clientid has expired, all compounds using sessions
5163 * associated with the stale clientid will be returning
5164 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5165 * be in some phase of session reset.
5167 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5169 nfs4_verifier verifier;
5170 struct nfs41_exchange_id_args args = {
5171 .verifier = &verifier,
5173 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5175 struct nfs41_exchange_id_res res = {
5179 struct rpc_message msg = {
5180 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5186 dprintk("--> %s\n", __func__);
5187 BUG_ON(clp == NULL);
5189 nfs4_init_boot_verifier(clp, &verifier);
5191 args.id_len = scnprintf(args.id, sizeof(args.id),
5194 clp->cl_rpcclient->cl_nodename,
5195 clp->cl_rpcclient->cl_auth->au_flavor);
5197 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5199 if (unlikely(res.server_owner == NULL)) {
5204 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5206 if (unlikely(res.server_scope == NULL)) {
5208 goto out_server_owner;
5211 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5212 if (unlikely(res.impl_id == NULL)) {
5214 goto out_server_scope;
5217 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5219 status = nfs4_check_cl_exchange_flags(res.flags);
5222 clp->cl_clientid = res.clientid;
5223 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5224 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5225 clp->cl_seqid = res.seqid;
5227 kfree(clp->cl_serverowner);
5228 clp->cl_serverowner = res.server_owner;
5229 res.server_owner = NULL;
5231 /* use the most recent implementation id */
5232 kfree(clp->cl_implid);
5233 clp->cl_implid = res.impl_id;
5235 if (clp->cl_serverscope != NULL &&
5236 !nfs41_same_server_scope(clp->cl_serverscope,
5237 res.server_scope)) {
5238 dprintk("%s: server_scope mismatch detected\n",
5240 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5241 kfree(clp->cl_serverscope);
5242 clp->cl_serverscope = NULL;
5245 if (clp->cl_serverscope == NULL) {
5246 clp->cl_serverscope = res.server_scope;
5253 kfree(res.server_owner);
5255 kfree(res.server_scope);
5257 if (clp->cl_implid != NULL)
5258 dprintk("%s: Server Implementation ID: "
5259 "domain: %s, name: %s, date: %llu,%u\n",
5260 __func__, clp->cl_implid->domain, clp->cl_implid->name,
5261 clp->cl_implid->date.seconds,
5262 clp->cl_implid->date.nseconds);
5263 dprintk("<-- %s status= %d\n", __func__, status);
5267 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5268 struct rpc_cred *cred)
5270 struct rpc_message msg = {
5271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5277 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5279 pr_warn("NFS: Got error %d from the server %s on "
5280 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5284 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5285 struct rpc_cred *cred)
5290 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5291 ret = _nfs4_proc_destroy_clientid(clp, cred);
5293 case -NFS4ERR_DELAY:
5294 case -NFS4ERR_CLIENTID_BUSY:
5304 int nfs4_destroy_clientid(struct nfs_client *clp)
5306 struct rpc_cred *cred;
5309 if (clp->cl_mvops->minor_version < 1)
5311 if (clp->cl_exchange_flags == 0)
5313 cred = nfs4_get_exchange_id_cred(clp);
5314 ret = nfs4_proc_destroy_clientid(clp, cred);
5319 case -NFS4ERR_STALE_CLIENTID:
5320 clp->cl_exchange_flags = 0;
5326 struct nfs4_get_lease_time_data {
5327 struct nfs4_get_lease_time_args *args;
5328 struct nfs4_get_lease_time_res *res;
5329 struct nfs_client *clp;
5332 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5336 struct nfs4_get_lease_time_data *data =
5337 (struct nfs4_get_lease_time_data *)calldata;
5339 dprintk("--> %s\n", __func__);
5340 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5341 /* just setup sequence, do not trigger session recovery
5342 since we're invoked within one */
5343 ret = nfs41_setup_sequence(data->clp->cl_session,
5344 &data->args->la_seq_args,
5345 &data->res->lr_seq_res, task);
5347 BUG_ON(ret == -EAGAIN);
5348 rpc_call_start(task);
5349 dprintk("<-- %s\n", __func__);
5353 * Called from nfs4_state_manager thread for session setup, so don't recover
5354 * from sequence operation or clientid errors.
5356 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5358 struct nfs4_get_lease_time_data *data =
5359 (struct nfs4_get_lease_time_data *)calldata;
5361 dprintk("--> %s\n", __func__);
5362 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5364 switch (task->tk_status) {
5365 case -NFS4ERR_DELAY:
5366 case -NFS4ERR_GRACE:
5367 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5368 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5369 task->tk_status = 0;
5371 case -NFS4ERR_RETRY_UNCACHED_REP:
5372 rpc_restart_call_prepare(task);
5375 dprintk("<-- %s\n", __func__);
5378 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5379 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5380 .rpc_call_done = nfs4_get_lease_time_done,
5383 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5385 struct rpc_task *task;
5386 struct nfs4_get_lease_time_args args;
5387 struct nfs4_get_lease_time_res res = {
5388 .lr_fsinfo = fsinfo,
5390 struct nfs4_get_lease_time_data data = {
5395 struct rpc_message msg = {
5396 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5400 struct rpc_task_setup task_setup = {
5401 .rpc_client = clp->cl_rpcclient,
5402 .rpc_message = &msg,
5403 .callback_ops = &nfs4_get_lease_time_ops,
5404 .callback_data = &data,
5405 .flags = RPC_TASK_TIMEOUT,
5409 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5410 dprintk("--> %s\n", __func__);
5411 task = rpc_run_task(&task_setup);
5414 status = PTR_ERR(task);
5416 status = task->tk_status;
5419 dprintk("<-- %s return %d\n", __func__, status);
5424 static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5426 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5429 static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5430 struct nfs4_slot *new,
5434 struct nfs4_slot *old = NULL;
5437 spin_lock(&tbl->slot_tbl_lock);
5441 tbl->max_slots = max_slots;
5443 tbl->highest_used_slotid = -1; /* no slot is currently used */
5444 for (i = 0; i < tbl->max_slots; i++)
5445 tbl->slots[i].seq_nr = ivalue;
5446 spin_unlock(&tbl->slot_tbl_lock);
5451 * (re)Initialise a slot table
5453 static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5456 struct nfs4_slot *new = NULL;
5459 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5460 max_reqs, tbl->max_slots);
5462 /* Does the newly negotiated max_reqs match the existing slot table? */
5463 if (max_reqs != tbl->max_slots) {
5464 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
5470 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
5471 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5472 tbl, tbl->slots, tbl->max_slots);
5474 dprintk("<-- %s: return %d\n", __func__, ret);
5478 /* Destroy the slot table */
5479 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5481 if (session->fc_slot_table.slots != NULL) {
5482 kfree(session->fc_slot_table.slots);
5483 session->fc_slot_table.slots = NULL;
5485 if (session->bc_slot_table.slots != NULL) {
5486 kfree(session->bc_slot_table.slots);
5487 session->bc_slot_table.slots = NULL;
5493 * Initialize or reset the forechannel and backchannel tables
5495 static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5497 struct nfs4_slot_table *tbl;
5500 dprintk("--> %s\n", __func__);
5502 tbl = &ses->fc_slot_table;
5503 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5504 if (status) /* -ENOMEM */
5507 tbl = &ses->bc_slot_table;
5508 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5509 if (status && tbl->slots == NULL)
5510 /* Fore and back channel share a connection so get
5511 * both slot tables or neither */
5512 nfs4_destroy_slot_tables(ses);
5516 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5518 struct nfs4_session *session;
5519 struct nfs4_slot_table *tbl;
5521 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5525 tbl = &session->fc_slot_table;
5526 tbl->highest_used_slotid = NFS4_NO_SLOT;
5527 spin_lock_init(&tbl->slot_tbl_lock);
5528 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5529 init_completion(&tbl->complete);
5531 tbl = &session->bc_slot_table;
5532 tbl->highest_used_slotid = NFS4_NO_SLOT;
5533 spin_lock_init(&tbl->slot_tbl_lock);
5534 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5535 init_completion(&tbl->complete);
5537 session->session_state = 1<<NFS4_SESSION_INITING;
5543 void nfs4_destroy_session(struct nfs4_session *session)
5545 struct rpc_xprt *xprt;
5546 struct rpc_cred *cred;
5548 cred = nfs4_get_exchange_id_cred(session->clp);
5549 nfs4_proc_destroy_session(session, cred);
5554 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5556 dprintk("%s Destroy backchannel for xprt %p\n",
5558 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5559 nfs4_destroy_slot_tables(session);
5564 * Initialize the values to be used by the client in CREATE_SESSION
5565 * If nfs4_init_session set the fore channel request and response sizes,
5568 * Set the back channel max_resp_sz_cached to zero to force the client to
5569 * always set csa_cachethis to FALSE because the current implementation
5570 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5572 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5574 struct nfs4_session *session = args->client->cl_session;
5575 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5576 mxresp_sz = session->fc_attrs.max_resp_sz;
5579 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5581 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5582 /* Fore channel attributes */
5583 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5584 args->fc_attrs.max_resp_sz = mxresp_sz;
5585 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5586 args->fc_attrs.max_reqs = max_session_slots;
5588 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5589 "max_ops=%u max_reqs=%u\n",
5591 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5592 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5594 /* Back channel attributes */
5595 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5596 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5597 args->bc_attrs.max_resp_sz_cached = 0;
5598 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5599 args->bc_attrs.max_reqs = 1;
5601 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5602 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5604 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5605 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5606 args->bc_attrs.max_reqs);
5609 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5611 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5612 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5614 if (rcvd->max_resp_sz > sent->max_resp_sz)
5617 * Our requested max_ops is the minimum we need; we're not
5618 * prepared to break up compounds into smaller pieces than that.
5619 * So, no point even trying to continue if the server won't
5622 if (rcvd->max_ops < sent->max_ops)
5624 if (rcvd->max_reqs == 0)
5626 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5627 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5631 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5633 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5634 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5636 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5638 if (rcvd->max_resp_sz < sent->max_resp_sz)
5640 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5642 /* These would render the backchannel useless: */
5643 if (rcvd->max_ops != sent->max_ops)
5645 if (rcvd->max_reqs != sent->max_reqs)
5650 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5651 struct nfs4_session *session)
5655 ret = nfs4_verify_fore_channel_attrs(args, session);
5658 return nfs4_verify_back_channel_attrs(args, session);
5661 static int _nfs4_proc_create_session(struct nfs_client *clp,
5662 struct rpc_cred *cred)
5664 struct nfs4_session *session = clp->cl_session;
5665 struct nfs41_create_session_args args = {
5667 .cb_program = NFS4_CALLBACK,
5669 struct nfs41_create_session_res res = {
5672 struct rpc_message msg = {
5673 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5680 nfs4_init_channel_attrs(&args);
5681 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5683 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5686 /* Verify the session's negotiated channel_attrs values */
5687 status = nfs4_verify_channel_attrs(&args, session);
5689 /* Increment the clientid slot sequence id */
5697 * Issues a CREATE_SESSION operation to the server.
5698 * It is the responsibility of the caller to verify the session is
5699 * expired before calling this routine.
5701 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5705 struct nfs4_session *session = clp->cl_session;
5707 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5709 status = _nfs4_proc_create_session(clp, cred);
5713 /* Init or reset the session slot tables */
5714 status = nfs4_setup_session_slot_tables(session);
5715 dprintk("slot table setup returned %d\n", status);
5719 ptr = (unsigned *)&session->sess_id.data[0];
5720 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5721 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5723 dprintk("<-- %s\n", __func__);
5728 * Issue the over-the-wire RPC DESTROY_SESSION.
5729 * The caller must serialize access to this routine.
5731 int nfs4_proc_destroy_session(struct nfs4_session *session,
5732 struct rpc_cred *cred)
5734 struct rpc_message msg = {
5735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5736 .rpc_argp = session,
5741 dprintk("--> nfs4_proc_destroy_session\n");
5743 /* session is still being setup */
5744 if (session->clp->cl_cons_state != NFS_CS_READY)
5747 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5751 "NFS: Got error %d from the server on DESTROY_SESSION. "
5752 "Session has been destroyed regardless...\n", status);
5754 dprintk("<-- nfs4_proc_destroy_session\n");
5759 * With sessions, the client is not marked ready until after a
5760 * successful EXCHANGE_ID and CREATE_SESSION.
5762 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
5763 * other versions of NFS can be tried.
5765 static int nfs41_check_session_ready(struct nfs_client *clp)
5769 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
5770 ret = nfs4_client_recover_expired_lease(clp);
5774 if (clp->cl_cons_state < NFS_CS_READY)
5775 return -EPROTONOSUPPORT;
5780 int nfs4_init_session(struct nfs_server *server)
5782 struct nfs_client *clp = server->nfs_client;
5783 struct nfs4_session *session;
5784 unsigned int rsize, wsize;
5786 if (!nfs4_has_session(clp))
5789 session = clp->cl_session;
5790 spin_lock(&clp->cl_lock);
5791 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5793 rsize = server->rsize;
5795 rsize = NFS_MAX_FILE_IO_SIZE;
5796 wsize = server->wsize;
5798 wsize = NFS_MAX_FILE_IO_SIZE;
5800 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5801 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5803 spin_unlock(&clp->cl_lock);
5805 return nfs41_check_session_ready(clp);
5808 int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
5810 struct nfs4_session *session = clp->cl_session;
5813 spin_lock(&clp->cl_lock);
5814 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5816 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
5817 * DS lease to be equal to the MDS lease.
5819 clp->cl_lease_time = lease_time;
5820 clp->cl_last_renewal = jiffies;
5822 spin_unlock(&clp->cl_lock);
5824 ret = nfs41_check_session_ready(clp);
5827 /* Test for the DS role */
5828 if (!is_ds_client(clp))
5832 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5836 * Renew the cl_session lease.
5838 struct nfs4_sequence_data {
5839 struct nfs_client *clp;
5840 struct nfs4_sequence_args args;
5841 struct nfs4_sequence_res res;
5844 static void nfs41_sequence_release(void *data)
5846 struct nfs4_sequence_data *calldata = data;
5847 struct nfs_client *clp = calldata->clp;
5849 if (atomic_read(&clp->cl_count) > 1)
5850 nfs4_schedule_state_renewal(clp);
5851 nfs_put_client(clp);
5855 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5857 switch(task->tk_status) {
5858 case -NFS4ERR_DELAY:
5859 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5862 nfs4_schedule_lease_recovery(clp);
5867 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5869 struct nfs4_sequence_data *calldata = data;
5870 struct nfs_client *clp = calldata->clp;
5872 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5875 if (task->tk_status < 0) {
5876 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5877 if (atomic_read(&clp->cl_count) == 1)
5880 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5881 rpc_restart_call_prepare(task);
5885 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5887 dprintk("<-- %s\n", __func__);
5890 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5892 struct nfs4_sequence_data *calldata = data;
5893 struct nfs_client *clp = calldata->clp;
5894 struct nfs4_sequence_args *args;
5895 struct nfs4_sequence_res *res;
5897 args = task->tk_msg.rpc_argp;
5898 res = task->tk_msg.rpc_resp;
5900 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
5902 rpc_call_start(task);
5905 static const struct rpc_call_ops nfs41_sequence_ops = {
5906 .rpc_call_done = nfs41_sequence_call_done,
5907 .rpc_call_prepare = nfs41_sequence_prepare,
5908 .rpc_release = nfs41_sequence_release,
5911 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5913 struct nfs4_sequence_data *calldata;
5914 struct rpc_message msg = {
5915 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5918 struct rpc_task_setup task_setup_data = {
5919 .rpc_client = clp->cl_rpcclient,
5920 .rpc_message = &msg,
5921 .callback_ops = &nfs41_sequence_ops,
5922 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5925 if (!atomic_inc_not_zero(&clp->cl_count))
5926 return ERR_PTR(-EIO);
5927 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5928 if (calldata == NULL) {
5929 nfs_put_client(clp);
5930 return ERR_PTR(-ENOMEM);
5932 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5933 msg.rpc_argp = &calldata->args;
5934 msg.rpc_resp = &calldata->res;
5935 calldata->clp = clp;
5936 task_setup_data.callback_data = calldata;
5938 return rpc_run_task(&task_setup_data);
5941 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5943 struct rpc_task *task;
5946 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5948 task = _nfs41_proc_sequence(clp, cred);
5950 ret = PTR_ERR(task);
5952 rpc_put_task_async(task);
5953 dprintk("<-- %s status=%d\n", __func__, ret);
5957 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5959 struct rpc_task *task;
5962 task = _nfs41_proc_sequence(clp, cred);
5964 ret = PTR_ERR(task);
5967 ret = rpc_wait_for_completion_task(task);
5969 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5971 if (task->tk_status == 0)
5972 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5973 ret = task->tk_status;
5977 dprintk("<-- %s status=%d\n", __func__, ret);
5981 struct nfs4_reclaim_complete_data {
5982 struct nfs_client *clp;
5983 struct nfs41_reclaim_complete_args arg;
5984 struct nfs41_reclaim_complete_res res;
5987 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5989 struct nfs4_reclaim_complete_data *calldata = data;
5991 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5992 if (nfs41_setup_sequence(calldata->clp->cl_session,
5993 &calldata->arg.seq_args,
5994 &calldata->res.seq_res, task))
5997 rpc_call_start(task);
6000 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6002 switch(task->tk_status) {
6004 case -NFS4ERR_COMPLETE_ALREADY:
6005 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6007 case -NFS4ERR_DELAY:
6008 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6010 case -NFS4ERR_RETRY_UNCACHED_REP:
6013 nfs4_schedule_lease_recovery(clp);
6018 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6020 struct nfs4_reclaim_complete_data *calldata = data;
6021 struct nfs_client *clp = calldata->clp;
6022 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6024 dprintk("--> %s\n", __func__);
6025 if (!nfs41_sequence_done(task, res))
6028 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6029 rpc_restart_call_prepare(task);
6032 dprintk("<-- %s\n", __func__);
6035 static void nfs4_free_reclaim_complete_data(void *data)
6037 struct nfs4_reclaim_complete_data *calldata = data;
6042 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6043 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6044 .rpc_call_done = nfs4_reclaim_complete_done,
6045 .rpc_release = nfs4_free_reclaim_complete_data,
6049 * Issue a global reclaim complete.
6051 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6053 struct nfs4_reclaim_complete_data *calldata;
6054 struct rpc_task *task;
6055 struct rpc_message msg = {
6056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6058 struct rpc_task_setup task_setup_data = {
6059 .rpc_client = clp->cl_rpcclient,
6060 .rpc_message = &msg,
6061 .callback_ops = &nfs4_reclaim_complete_call_ops,
6062 .flags = RPC_TASK_ASYNC,
6064 int status = -ENOMEM;
6066 dprintk("--> %s\n", __func__);
6067 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6068 if (calldata == NULL)
6070 calldata->clp = clp;
6071 calldata->arg.one_fs = 0;
6073 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6074 msg.rpc_argp = &calldata->arg;
6075 msg.rpc_resp = &calldata->res;
6076 task_setup_data.callback_data = calldata;
6077 task = rpc_run_task(&task_setup_data);
6079 status = PTR_ERR(task);
6082 status = nfs4_wait_for_completion_rpc_task(task);
6084 status = task->tk_status;
6088 dprintk("<-- %s status=%d\n", __func__, status);
6093 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6095 struct nfs4_layoutget *lgp = calldata;
6096 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6098 dprintk("--> %s\n", __func__);
6099 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6100 * right now covering the LAYOUTGET we are about to send.
6101 * However, that is not so catastrophic, and there seems
6102 * to be no way to prevent it completely.
6104 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
6105 &lgp->res.seq_res, task))
6107 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6108 NFS_I(lgp->args.inode)->layout,
6109 lgp->args.ctx->state)) {
6110 rpc_exit(task, NFS4_OK);
6113 rpc_call_start(task);
6116 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6118 struct nfs4_layoutget *lgp = calldata;
6119 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6121 dprintk("--> %s\n", __func__);
6123 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6126 switch (task->tk_status) {
6129 case -NFS4ERR_LAYOUTTRYLATER:
6130 case -NFS4ERR_RECALLCONFLICT:
6131 task->tk_status = -NFS4ERR_DELAY;
6134 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6135 rpc_restart_call_prepare(task);
6139 dprintk("<-- %s\n", __func__);
6142 static void nfs4_layoutget_release(void *calldata)
6144 struct nfs4_layoutget *lgp = calldata;
6146 dprintk("--> %s\n", __func__);
6147 put_nfs_open_context(lgp->args.ctx);
6149 dprintk("<-- %s\n", __func__);
6152 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6153 .rpc_call_prepare = nfs4_layoutget_prepare,
6154 .rpc_call_done = nfs4_layoutget_done,
6155 .rpc_release = nfs4_layoutget_release,
6158 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
6160 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6161 struct rpc_task *task;
6162 struct rpc_message msg = {
6163 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6164 .rpc_argp = &lgp->args,
6165 .rpc_resp = &lgp->res,
6167 struct rpc_task_setup task_setup_data = {
6168 .rpc_client = server->client,
6169 .rpc_message = &msg,
6170 .callback_ops = &nfs4_layoutget_call_ops,
6171 .callback_data = lgp,
6172 .flags = RPC_TASK_ASYNC,
6176 dprintk("--> %s\n", __func__);
6178 lgp->res.layoutp = &lgp->args.layout;
6179 lgp->res.seq_res.sr_slot = NULL;
6180 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6181 task = rpc_run_task(&task_setup_data);
6183 return PTR_ERR(task);
6184 status = nfs4_wait_for_completion_rpc_task(task);
6186 status = task->tk_status;
6188 status = pnfs_layout_process(lgp);
6190 dprintk("<-- %s status=%d\n", __func__, status);
6195 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6197 struct nfs4_layoutreturn *lrp = calldata;
6199 dprintk("--> %s\n", __func__);
6200 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
6201 &lrp->res.seq_res, task))
6203 rpc_call_start(task);
6206 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6208 struct nfs4_layoutreturn *lrp = calldata;
6209 struct nfs_server *server;
6210 struct pnfs_layout_hdr *lo = lrp->args.layout;
6212 dprintk("--> %s\n", __func__);
6214 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6217 server = NFS_SERVER(lrp->args.inode);
6218 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6219 rpc_restart_call_prepare(task);
6222 spin_lock(&lo->plh_inode->i_lock);
6223 if (task->tk_status == 0) {
6224 if (lrp->res.lrs_present) {
6225 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6227 BUG_ON(!list_empty(&lo->plh_segs));
6229 lo->plh_block_lgets--;
6230 spin_unlock(&lo->plh_inode->i_lock);
6231 dprintk("<-- %s\n", __func__);
6234 static void nfs4_layoutreturn_release(void *calldata)
6236 struct nfs4_layoutreturn *lrp = calldata;
6238 dprintk("--> %s\n", __func__);
6239 put_layout_hdr(lrp->args.layout);
6241 dprintk("<-- %s\n", __func__);
6244 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6245 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6246 .rpc_call_done = nfs4_layoutreturn_done,
6247 .rpc_release = nfs4_layoutreturn_release,
6250 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6252 struct rpc_task *task;
6253 struct rpc_message msg = {
6254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6255 .rpc_argp = &lrp->args,
6256 .rpc_resp = &lrp->res,
6258 struct rpc_task_setup task_setup_data = {
6259 .rpc_client = lrp->clp->cl_rpcclient,
6260 .rpc_message = &msg,
6261 .callback_ops = &nfs4_layoutreturn_call_ops,
6262 .callback_data = lrp,
6266 dprintk("--> %s\n", __func__);
6267 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6268 task = rpc_run_task(&task_setup_data);
6270 return PTR_ERR(task);
6271 status = task->tk_status;
6272 dprintk("<-- %s status=%d\n", __func__, status);
6278 * Retrieve the list of Data Server devices from the MDS.
6280 static int _nfs4_getdevicelist(struct nfs_server *server,
6281 const struct nfs_fh *fh,
6282 struct pnfs_devicelist *devlist)
6284 struct nfs4_getdevicelist_args args = {
6286 .layoutclass = server->pnfs_curr_ld->id,
6288 struct nfs4_getdevicelist_res res = {
6291 struct rpc_message msg = {
6292 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6298 dprintk("--> %s\n", __func__);
6299 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6301 dprintk("<-- %s status=%d\n", __func__, status);
6305 int nfs4_proc_getdevicelist(struct nfs_server *server,
6306 const struct nfs_fh *fh,
6307 struct pnfs_devicelist *devlist)
6309 struct nfs4_exception exception = { };
6313 err = nfs4_handle_exception(server,
6314 _nfs4_getdevicelist(server, fh, devlist),
6316 } while (exception.retry);
6318 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6319 err, devlist->num_devs);
6323 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6326 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6328 struct nfs4_getdeviceinfo_args args = {
6331 struct nfs4_getdeviceinfo_res res = {
6334 struct rpc_message msg = {
6335 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6341 dprintk("--> %s\n", __func__);
6342 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6343 dprintk("<-- %s status=%d\n", __func__, status);
6348 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6350 struct nfs4_exception exception = { };
6354 err = nfs4_handle_exception(server,
6355 _nfs4_proc_getdeviceinfo(server, pdev),
6357 } while (exception.retry);
6360 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6362 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6364 struct nfs4_layoutcommit_data *data = calldata;
6365 struct nfs_server *server = NFS_SERVER(data->args.inode);
6367 if (nfs4_setup_sequence(server, &data->args.seq_args,
6368 &data->res.seq_res, task))
6370 rpc_call_start(task);
6374 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6376 struct nfs4_layoutcommit_data *data = calldata;
6377 struct nfs_server *server = NFS_SERVER(data->args.inode);
6379 if (!nfs4_sequence_done(task, &data->res.seq_res))
6382 switch (task->tk_status) { /* Just ignore these failures */
6383 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6384 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6385 case -NFS4ERR_BADLAYOUT: /* no layout */
6386 case -NFS4ERR_GRACE: /* loca_recalim always false */
6387 task->tk_status = 0;
6390 nfs_post_op_update_inode_force_wcc(data->args.inode,
6394 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6395 rpc_restart_call_prepare(task);
6401 static void nfs4_layoutcommit_release(void *calldata)
6403 struct nfs4_layoutcommit_data *data = calldata;
6404 struct pnfs_layout_segment *lseg, *tmp;
6405 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6407 pnfs_cleanup_layoutcommit(data);
6408 /* Matched by references in pnfs_set_layoutcommit */
6409 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6410 list_del_init(&lseg->pls_lc_list);
6411 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6416 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6417 smp_mb__after_clear_bit();
6418 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6420 put_rpccred(data->cred);
6424 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6425 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6426 .rpc_call_done = nfs4_layoutcommit_done,
6427 .rpc_release = nfs4_layoutcommit_release,
6431 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6433 struct rpc_message msg = {
6434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6435 .rpc_argp = &data->args,
6436 .rpc_resp = &data->res,
6437 .rpc_cred = data->cred,
6439 struct rpc_task_setup task_setup_data = {
6440 .task = &data->task,
6441 .rpc_client = NFS_CLIENT(data->args.inode),
6442 .rpc_message = &msg,
6443 .callback_ops = &nfs4_layoutcommit_ops,
6444 .callback_data = data,
6445 .flags = RPC_TASK_ASYNC,
6447 struct rpc_task *task;
6450 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6451 "lbw: %llu inode %lu\n",
6452 data->task.tk_pid, sync,
6453 data->args.lastbytewritten,
6454 data->args.inode->i_ino);
6456 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6457 task = rpc_run_task(&task_setup_data);
6459 return PTR_ERR(task);
6462 status = nfs4_wait_for_completion_rpc_task(task);
6465 status = task->tk_status;
6467 dprintk("%s: status %d\n", __func__, status);
6473 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6474 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6476 struct nfs41_secinfo_no_name_args args = {
6477 .style = SECINFO_STYLE_CURRENT_FH,
6479 struct nfs4_secinfo_res res = {
6482 struct rpc_message msg = {
6483 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6487 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6491 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6492 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6494 struct nfs4_exception exception = { };
6497 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6500 case -NFS4ERR_WRONGSEC:
6501 case -NFS4ERR_NOTSUPP:
6504 err = nfs4_handle_exception(server, err, &exception);
6506 } while (exception.retry);
6512 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6513 struct nfs_fsinfo *info)
6517 rpc_authflavor_t flavor;
6518 struct nfs4_secinfo_flavors *flavors;
6520 page = alloc_page(GFP_KERNEL);
6526 flavors = page_address(page);
6527 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6530 * Fall back on "guess and check" method if
6531 * the server doesn't support SECINFO_NO_NAME
6533 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6534 err = nfs4_find_root_sec(server, fhandle, info);
6540 flavor = nfs_find_best_sec(flavors);
6542 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6552 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6555 struct nfs41_test_stateid_args args = {
6558 struct nfs41_test_stateid_res res;
6559 struct rpc_message msg = {
6560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6565 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6566 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6568 if (status == NFS_OK)
6573 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6575 struct nfs4_exception exception = { };
6578 err = nfs4_handle_exception(server,
6579 _nfs41_test_stateid(server, stateid),
6581 } while (exception.retry);
6585 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6587 struct nfs41_free_stateid_args args = {
6590 struct nfs41_free_stateid_res res;
6591 struct rpc_message msg = {
6592 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6597 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6598 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6601 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6603 struct nfs4_exception exception = { };
6606 err = nfs4_handle_exception(server,
6607 _nfs4_free_stateid(server, stateid),
6609 } while (exception.retry);
6613 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6614 const nfs4_stateid *s2)
6616 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6619 if (s1->seqid == s2->seqid)
6621 if (s1->seqid == 0 || s2->seqid == 0)
6627 #endif /* CONFIG_NFS_V4_1 */
6629 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6630 const nfs4_stateid *s2)
6632 return nfs4_stateid_match(s1, s2);
6636 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6637 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6638 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6639 .recover_open = nfs4_open_reclaim,
6640 .recover_lock = nfs4_lock_reclaim,
6641 .establish_clid = nfs4_init_clientid,
6642 .get_clid_cred = nfs4_get_setclientid_cred,
6645 #if defined(CONFIG_NFS_V4_1)
6646 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6647 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6648 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6649 .recover_open = nfs4_open_reclaim,
6650 .recover_lock = nfs4_lock_reclaim,
6651 .establish_clid = nfs41_init_clientid,
6652 .get_clid_cred = nfs4_get_exchange_id_cred,
6653 .reclaim_complete = nfs41_proc_reclaim_complete,
6655 #endif /* CONFIG_NFS_V4_1 */
6657 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6658 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6659 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6660 .recover_open = nfs4_open_expired,
6661 .recover_lock = nfs4_lock_expired,
6662 .establish_clid = nfs4_init_clientid,
6663 .get_clid_cred = nfs4_get_setclientid_cred,
6666 #if defined(CONFIG_NFS_V4_1)
6667 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6668 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6669 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6670 .recover_open = nfs41_open_expired,
6671 .recover_lock = nfs41_lock_expired,
6672 .establish_clid = nfs41_init_clientid,
6673 .get_clid_cred = nfs4_get_exchange_id_cred,
6675 #endif /* CONFIG_NFS_V4_1 */
6677 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6678 .sched_state_renewal = nfs4_proc_async_renew,
6679 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6680 .renew_lease = nfs4_proc_renew,
6683 #if defined(CONFIG_NFS_V4_1)
6684 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6685 .sched_state_renewal = nfs41_proc_async_sequence,
6686 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6687 .renew_lease = nfs4_proc_sequence,
6691 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6693 .call_sync = _nfs4_call_sync,
6694 .match_stateid = nfs4_match_stateid,
6695 .find_root_sec = nfs4_find_root_sec,
6696 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6697 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6698 .state_renewal_ops = &nfs40_state_renewal_ops,
6701 #if defined(CONFIG_NFS_V4_1)
6702 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6704 .call_sync = _nfs4_call_sync_session,
6705 .match_stateid = nfs41_match_stateid,
6706 .find_root_sec = nfs41_find_root_sec,
6707 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6708 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6709 .state_renewal_ops = &nfs41_state_renewal_ops,
6713 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6714 [0] = &nfs_v4_0_minor_ops,
6715 #if defined(CONFIG_NFS_V4_1)
6716 [1] = &nfs_v4_1_minor_ops,
6720 static const struct inode_operations nfs4_file_inode_operations = {
6721 .permission = nfs_permission,
6722 .getattr = nfs_getattr,
6723 .setattr = nfs_setattr,
6724 .getxattr = generic_getxattr,
6725 .setxattr = generic_setxattr,
6726 .listxattr = generic_listxattr,
6727 .removexattr = generic_removexattr,
6730 const struct nfs_rpc_ops nfs_v4_clientops = {
6731 .version = 4, /* protocol version */
6732 .dentry_ops = &nfs4_dentry_operations,
6733 .dir_inode_ops = &nfs4_dir_inode_operations,
6734 .file_inode_ops = &nfs4_file_inode_operations,
6735 .file_ops = &nfs4_file_operations,
6736 .getroot = nfs4_proc_get_root,
6737 .submount = nfs4_submount,
6738 .getattr = nfs4_proc_getattr,
6739 .setattr = nfs4_proc_setattr,
6740 .lookup = nfs4_proc_lookup,
6741 .access = nfs4_proc_access,
6742 .readlink = nfs4_proc_readlink,
6743 .create = nfs4_proc_create,
6744 .remove = nfs4_proc_remove,
6745 .unlink_setup = nfs4_proc_unlink_setup,
6746 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
6747 .unlink_done = nfs4_proc_unlink_done,
6748 .rename = nfs4_proc_rename,
6749 .rename_setup = nfs4_proc_rename_setup,
6750 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
6751 .rename_done = nfs4_proc_rename_done,
6752 .link = nfs4_proc_link,
6753 .symlink = nfs4_proc_symlink,
6754 .mkdir = nfs4_proc_mkdir,
6755 .rmdir = nfs4_proc_remove,
6756 .readdir = nfs4_proc_readdir,
6757 .mknod = nfs4_proc_mknod,
6758 .statfs = nfs4_proc_statfs,
6759 .fsinfo = nfs4_proc_fsinfo,
6760 .pathconf = nfs4_proc_pathconf,
6761 .set_capabilities = nfs4_server_capabilities,
6762 .decode_dirent = nfs4_decode_dirent,
6763 .read_setup = nfs4_proc_read_setup,
6764 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
6765 .read_done = nfs4_read_done,
6766 .write_setup = nfs4_proc_write_setup,
6767 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6768 .write_done = nfs4_write_done,
6769 .commit_setup = nfs4_proc_commit_setup,
6770 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
6771 .commit_done = nfs4_commit_done,
6772 .lock = nfs4_proc_lock,
6773 .clear_acl_cache = nfs4_zap_acl_attr,
6774 .close_context = nfs4_close_context,
6775 .open_context = nfs4_atomic_open,
6776 .init_client = nfs4_init_client,
6779 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6780 .prefix = XATTR_NAME_NFSV4_ACL,
6781 .list = nfs4_xattr_list_nfs4_acl,
6782 .get = nfs4_xattr_get_nfs4_acl,
6783 .set = nfs4_xattr_set_nfs4_acl,
6786 const struct xattr_handler *nfs4_xattr_handlers[] = {
6787 &nfs4_xattr_nfs4_acl_handler,
6791 module_param(max_session_slots, ushort, 0644);
6792 MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6793 "requests the client will negotiate");