4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/nfs.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs_fs.h>
49 #include <linux/nfs_page.h>
50 #include <linux/nfs_mount.h>
51 #include <linux/namei.h>
52 #include <linux/mount.h>
53 #include <linux/module.h>
54 #include <linux/nfs_idmap.h>
55 #include <linux/xattr.h>
56 #include <linux/utsname.h>
57 #include <linux/freezer.h>
60 #include "delegation.h"
66 #include "nfs4session.h"
69 #define NFSDBG_FACILITY NFSDBG_PROC
71 #define NFS4_POLL_RETRY_MIN (HZ/10)
72 #define NFS4_POLL_RETRY_MAX (15*HZ)
75 static int _nfs4_proc_open(struct nfs4_opendata *data);
76 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
77 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
78 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
79 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
80 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
81 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
82 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
83 struct nfs_fattr *fattr, struct iattr *sattr,
84 struct nfs4_state *state);
85 #ifdef CONFIG_NFS_V4_1
86 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
87 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
89 /* Prevent leaks of NFSv4 errors into userland */
90 static int nfs4_map_errors(int err)
95 case -NFS4ERR_RESOURCE:
97 case -NFS4ERR_WRONGSEC:
99 case -NFS4ERR_BADOWNER:
100 case -NFS4ERR_BADNAME:
102 case -NFS4ERR_SHARE_DENIED:
104 case -NFS4ERR_MINOR_VERS_MISMATCH:
105 return -EPROTONOSUPPORT;
106 case -NFS4ERR_ACCESS:
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[3] = {
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 static const u32 nfs4_pnfs_open_bitmap[3] = {
138 | FATTR4_WORD0_CHANGE
141 | FATTR4_WORD0_FILEID,
143 | FATTR4_WORD1_NUMLINKS
145 | FATTR4_WORD1_OWNER_GROUP
146 | FATTR4_WORD1_RAWDEV
147 | FATTR4_WORD1_SPACE_USED
148 | FATTR4_WORD1_TIME_ACCESS
149 | FATTR4_WORD1_TIME_METADATA
150 | FATTR4_WORD1_TIME_MODIFY,
151 FATTR4_WORD2_MDSTHRESHOLD
154 static const u32 nfs4_open_noattr_bitmap[3] = {
156 | FATTR4_WORD0_CHANGE
157 | FATTR4_WORD0_FILEID,
160 const u32 nfs4_statfs_bitmap[2] = {
161 FATTR4_WORD0_FILES_AVAIL
162 | FATTR4_WORD0_FILES_FREE
163 | FATTR4_WORD0_FILES_TOTAL,
164 FATTR4_WORD1_SPACE_AVAIL
165 | FATTR4_WORD1_SPACE_FREE
166 | FATTR4_WORD1_SPACE_TOTAL
169 const u32 nfs4_pathconf_bitmap[2] = {
171 | FATTR4_WORD0_MAXNAME,
175 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
176 | FATTR4_WORD0_MAXREAD
177 | FATTR4_WORD0_MAXWRITE
178 | FATTR4_WORD0_LEASE_TIME,
179 FATTR4_WORD1_TIME_DELTA
180 | FATTR4_WORD1_FS_LAYOUT_TYPES,
181 FATTR4_WORD2_LAYOUT_BLKSIZE
184 const u32 nfs4_fs_locations_bitmap[2] = {
186 | FATTR4_WORD0_CHANGE
189 | FATTR4_WORD0_FILEID
190 | FATTR4_WORD0_FS_LOCATIONS,
192 | FATTR4_WORD1_NUMLINKS
194 | FATTR4_WORD1_OWNER_GROUP
195 | FATTR4_WORD1_RAWDEV
196 | FATTR4_WORD1_SPACE_USED
197 | FATTR4_WORD1_TIME_ACCESS
198 | FATTR4_WORD1_TIME_METADATA
199 | FATTR4_WORD1_TIME_MODIFY
200 | FATTR4_WORD1_MOUNTED_ON_FILEID
203 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
204 struct nfs4_readdir_arg *readdir)
209 readdir->cookie = cookie;
210 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
215 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
220 * NFSv4 servers do not return entries for '.' and '..'
221 * Therefore, we fake these entries here. We let '.'
222 * have cookie 0 and '..' have cookie 1. Note that
223 * when talking to the server, we always send cookie 0
226 start = p = kmap_atomic(*readdir->pages);
229 *p++ = xdr_one; /* next */
230 *p++ = xdr_zero; /* cookie, first word */
231 *p++ = xdr_one; /* cookie, second word */
232 *p++ = xdr_one; /* entry len */
233 memcpy(p, ".\0\0\0", 4); /* entry */
235 *p++ = xdr_one; /* bitmap length */
236 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
237 *p++ = htonl(8); /* attribute buffer length */
238 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
241 *p++ = xdr_one; /* next */
242 *p++ = xdr_zero; /* cookie, first word */
243 *p++ = xdr_two; /* cookie, second word */
244 *p++ = xdr_two; /* entry len */
245 memcpy(p, "..\0\0", 4); /* entry */
247 *p++ = xdr_one; /* bitmap length */
248 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
249 *p++ = htonl(8); /* attribute buffer length */
250 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
252 readdir->pgbase = (char *)p - (char *)start;
253 readdir->count -= readdir->pgbase;
254 kunmap_atomic(start);
257 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
264 *timeout = NFS4_POLL_RETRY_MIN;
265 if (*timeout > NFS4_POLL_RETRY_MAX)
266 *timeout = NFS4_POLL_RETRY_MAX;
267 freezable_schedule_timeout_killable(*timeout);
268 if (fatal_signal_pending(current))
274 /* This is the error handling routine for processes that are allowed
277 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
279 struct nfs_client *clp = server->nfs_client;
280 struct nfs4_state *state = exception->state;
281 struct inode *inode = exception->inode;
284 exception->retry = 0;
288 case -NFS4ERR_OPENMODE:
289 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
290 nfs4_inode_return_delegation(inode);
291 exception->retry = 1;
296 nfs4_schedule_stateid_recovery(server, state);
297 goto wait_on_recovery;
298 case -NFS4ERR_DELEG_REVOKED:
299 case -NFS4ERR_ADMIN_REVOKED:
300 case -NFS4ERR_BAD_STATEID:
303 nfs_remove_bad_delegation(state->inode);
304 nfs4_schedule_stateid_recovery(server, state);
305 goto wait_on_recovery;
306 case -NFS4ERR_EXPIRED:
308 nfs4_schedule_stateid_recovery(server, state);
309 case -NFS4ERR_STALE_STATEID:
310 case -NFS4ERR_STALE_CLIENTID:
311 nfs4_schedule_lease_recovery(clp);
312 goto wait_on_recovery;
313 #if defined(CONFIG_NFS_V4_1)
314 case -NFS4ERR_BADSESSION:
315 case -NFS4ERR_BADSLOT:
316 case -NFS4ERR_BAD_HIGH_SLOT:
317 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
318 case -NFS4ERR_DEADSESSION:
319 case -NFS4ERR_SEQ_FALSE_RETRY:
320 case -NFS4ERR_SEQ_MISORDERED:
321 dprintk("%s ERROR: %d Reset session\n", __func__,
323 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
324 goto wait_on_recovery;
325 #endif /* defined(CONFIG_NFS_V4_1) */
326 case -NFS4ERR_FILE_OPEN:
327 if (exception->timeout > HZ) {
328 /* We have retried a decent amount, time to
336 ret = nfs4_delay(server->client, &exception->timeout);
339 case -NFS4ERR_RETRY_UNCACHED_REP:
340 case -NFS4ERR_OLD_STATEID:
341 exception->retry = 1;
343 case -NFS4ERR_BADOWNER:
344 /* The following works around a Linux server bug! */
345 case -NFS4ERR_BADNAME:
346 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
347 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
348 exception->retry = 1;
349 printk(KERN_WARNING "NFS: v4 server %s "
350 "does not accept raw "
352 "Reenabling the idmapper.\n",
353 server->nfs_client->cl_hostname);
356 /* We failed to handle the error */
357 return nfs4_map_errors(ret);
359 ret = nfs4_wait_clnt_recover(clp);
361 exception->retry = 1;
366 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
368 spin_lock(&clp->cl_lock);
369 if (time_before(clp->cl_last_renewal,timestamp))
370 clp->cl_last_renewal = timestamp;
371 spin_unlock(&clp->cl_lock);
374 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
376 do_renew_lease(server->nfs_client, timestamp);
379 #if defined(CONFIG_NFS_V4_1)
381 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
383 struct nfs4_session *session;
384 struct nfs4_slot_table *tbl;
385 bool send_new_highest_used_slotid = false;
388 /* just wake up the next guy waiting since
389 * we may have not consumed a slot after all */
390 dprintk("%s: No slot\n", __func__);
393 tbl = res->sr_slot->table;
394 session = tbl->session;
396 spin_lock(&tbl->slot_tbl_lock);
397 /* Be nice to the server: try to ensure that the last transmitted
398 * value for highest_user_slotid <= target_highest_slotid
400 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
401 send_new_highest_used_slotid = true;
403 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
404 send_new_highest_used_slotid = false;
407 nfs4_free_slot(tbl, res->sr_slot);
409 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
410 send_new_highest_used_slotid = false;
412 spin_unlock(&tbl->slot_tbl_lock);
414 if (send_new_highest_used_slotid)
415 nfs41_server_notify_highest_slotid_update(session->clp);
418 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
420 struct nfs4_session *session;
421 struct nfs4_slot *slot;
422 struct nfs_client *clp;
423 bool interrupted = false;
426 /* don't increment the sequence number if the task wasn't sent */
427 if (!RPC_WAS_SENT(task))
431 session = slot->table->session;
433 if (slot->interrupted) {
434 slot->interrupted = 0;
438 /* Check the SEQUENCE operation status */
439 switch (res->sr_status) {
441 /* Update the slot's sequence and clientid lease timer */
444 do_renew_lease(clp, res->sr_timestamp);
445 /* Check sequence flags */
446 if (res->sr_status_flags != 0)
447 nfs4_schedule_lease_recovery(clp);
448 nfs41_update_target_slotid(slot->table, slot, res);
452 * sr_status remains 1 if an RPC level error occurred.
453 * The server may or may not have processed the sequence
455 * Mark the slot as having hosted an interrupted RPC call.
457 slot->interrupted = 1;
460 /* The server detected a resend of the RPC call and
461 * returned NFS4ERR_DELAY as per Section 2.10.6.2
464 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
469 case -NFS4ERR_BADSLOT:
471 * The slot id we used was probably retired. Try again
472 * using a different slot id.
475 case -NFS4ERR_SEQ_MISORDERED:
477 * Was the last operation on this sequence interrupted?
478 * If so, retry after bumping the sequence number.
485 * Could this slot have been previously retired?
486 * If so, then the server may be expecting seq_nr = 1!
488 if (slot->seq_nr != 1) {
493 case -NFS4ERR_SEQ_FALSE_RETRY:
497 /* Just update the slot sequence no. */
501 /* The session may be reset by one of the error handlers. */
502 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
503 nfs41_sequence_free_slot(res);
506 if (rpc_restart_call_prepare(task)) {
512 if (!rpc_restart_call(task))
514 rpc_delay(task, NFS4_POLL_RETRY_MAX);
518 static int nfs4_sequence_done(struct rpc_task *task,
519 struct nfs4_sequence_res *res)
521 if (res->sr_slot == NULL)
523 return nfs41_sequence_done(task, res);
526 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
527 struct nfs4_sequence_res *res, int cache_reply)
529 args->sa_slot = NULL;
530 args->sa_cache_this = 0;
531 args->sa_privileged = 0;
533 args->sa_cache_this = 1;
537 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
539 args->sa_privileged = 1;
542 int nfs41_setup_sequence(struct nfs4_session *session,
543 struct nfs4_sequence_args *args,
544 struct nfs4_sequence_res *res,
545 struct rpc_task *task)
547 struct nfs4_slot *slot;
548 struct nfs4_slot_table *tbl;
550 dprintk("--> %s\n", __func__);
551 /* slot already allocated? */
552 if (res->sr_slot != NULL)
555 tbl = &session->fc_slot_table;
557 task->tk_timeout = 0;
559 spin_lock(&tbl->slot_tbl_lock);
560 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
561 !args->sa_privileged) {
562 /* The state manager will wait until the slot table is empty */
563 dprintk("%s session is draining\n", __func__);
567 slot = nfs4_alloc_slot(tbl);
569 /* If out of memory, try again in 1/4 second */
570 if (slot == ERR_PTR(-ENOMEM))
571 task->tk_timeout = HZ >> 2;
572 dprintk("<-- %s: no free slots\n", __func__);
575 spin_unlock(&tbl->slot_tbl_lock);
577 args->sa_slot = slot;
579 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
580 slot->slot_nr, slot->seq_nr);
583 res->sr_timestamp = jiffies;
584 res->sr_status_flags = 0;
586 * sr_status is only set in decode_sequence, and so will remain
587 * set to 1 if an rpc level failure occurs.
591 rpc_call_start(task);
594 /* Privileged tasks are queued with top priority */
595 if (args->sa_privileged)
596 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
597 NULL, RPC_PRIORITY_PRIVILEGED);
599 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
600 spin_unlock(&tbl->slot_tbl_lock);
603 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
605 int nfs4_setup_sequence(const struct nfs_server *server,
606 struct nfs4_sequence_args *args,
607 struct nfs4_sequence_res *res,
608 struct rpc_task *task)
610 struct nfs4_session *session = nfs4_get_session(server);
613 if (session == NULL) {
614 rpc_call_start(task);
618 dprintk("--> %s clp %p session %p sr_slot %d\n",
619 __func__, session->clp, session, res->sr_slot ?
620 res->sr_slot->slot_nr : -1);
622 ret = nfs41_setup_sequence(session, args, res, task);
624 dprintk("<-- %s status=%d\n", __func__, ret);
628 struct nfs41_call_sync_data {
629 const struct nfs_server *seq_server;
630 struct nfs4_sequence_args *seq_args;
631 struct nfs4_sequence_res *seq_res;
634 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
636 struct nfs41_call_sync_data *data = calldata;
637 struct nfs4_session *session = nfs4_get_session(data->seq_server);
639 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
641 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
644 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
646 struct nfs41_call_sync_data *data = calldata;
648 nfs41_sequence_done(task, data->seq_res);
651 static const struct rpc_call_ops nfs41_call_sync_ops = {
652 .rpc_call_prepare = nfs41_call_sync_prepare,
653 .rpc_call_done = nfs41_call_sync_done,
656 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
657 struct nfs_server *server,
658 struct rpc_message *msg,
659 struct nfs4_sequence_args *args,
660 struct nfs4_sequence_res *res)
663 struct rpc_task *task;
664 struct nfs41_call_sync_data data = {
665 .seq_server = server,
669 struct rpc_task_setup task_setup = {
672 .callback_ops = &nfs41_call_sync_ops,
673 .callback_data = &data
676 task = rpc_run_task(&task_setup);
680 ret = task->tk_status;
688 void nfs41_init_sequence(struct nfs4_sequence_args *args,
689 struct nfs4_sequence_res *res, int cache_reply)
693 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
698 static int nfs4_sequence_done(struct rpc_task *task,
699 struct nfs4_sequence_res *res)
703 #endif /* CONFIG_NFS_V4_1 */
706 int _nfs4_call_sync(struct rpc_clnt *clnt,
707 struct nfs_server *server,
708 struct rpc_message *msg,
709 struct nfs4_sequence_args *args,
710 struct nfs4_sequence_res *res)
712 return rpc_call_sync(clnt, msg, 0);
716 int nfs4_call_sync(struct rpc_clnt *clnt,
717 struct nfs_server *server,
718 struct rpc_message *msg,
719 struct nfs4_sequence_args *args,
720 struct nfs4_sequence_res *res,
723 nfs41_init_sequence(args, res, cache_reply);
724 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
728 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
730 struct nfs_inode *nfsi = NFS_I(dir);
732 spin_lock(&dir->i_lock);
733 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
734 if (!cinfo->atomic || cinfo->before != dir->i_version)
735 nfs_force_lookup_revalidate(dir);
736 dir->i_version = cinfo->after;
737 nfs_fscache_invalidate(dir);
738 spin_unlock(&dir->i_lock);
741 struct nfs4_opendata {
743 struct nfs_openargs o_arg;
744 struct nfs_openres o_res;
745 struct nfs_open_confirmargs c_arg;
746 struct nfs_open_confirmres c_res;
747 struct nfs4_string owner_name;
748 struct nfs4_string group_name;
749 struct nfs_fattr f_attr;
751 struct dentry *dentry;
752 struct nfs4_state_owner *owner;
753 struct nfs4_state *state;
755 unsigned long timestamp;
756 unsigned int rpc_done : 1;
762 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
764 p->o_res.f_attr = &p->f_attr;
765 p->o_res.seqid = p->o_arg.seqid;
766 p->c_res.seqid = p->c_arg.seqid;
767 p->o_res.server = p->o_arg.server;
768 p->o_res.access_request = p->o_arg.access;
769 nfs_fattr_init(&p->f_attr);
770 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
773 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
774 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
775 const struct iattr *attrs,
778 struct dentry *parent = dget_parent(dentry);
779 struct inode *dir = parent->d_inode;
780 struct nfs_server *server = NFS_SERVER(dir);
781 struct nfs4_opendata *p;
783 p = kzalloc(sizeof(*p), gfp_mask);
786 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
787 if (p->o_arg.seqid == NULL)
789 nfs_sb_active(dentry->d_sb);
790 p->dentry = dget(dentry);
793 atomic_inc(&sp->so_count);
794 p->o_arg.fh = NFS_FH(dir);
795 p->o_arg.open_flags = flags;
796 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
797 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
798 * will return permission denied for all bits until close */
799 if (!(flags & O_EXCL)) {
800 /* ask server to check for all possible rights as results
802 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
803 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
805 p->o_arg.clientid = server->nfs_client->cl_clientid;
806 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
807 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
808 p->o_arg.name = &dentry->d_name;
809 p->o_arg.server = server;
810 p->o_arg.bitmask = server->attr_bitmask;
811 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
812 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
813 if (attrs != NULL && attrs->ia_valid != 0) {
816 p->o_arg.u.attrs = &p->attrs;
817 memcpy(&p->attrs, attrs, sizeof(p->attrs));
820 verf[1] = current->pid;
821 memcpy(p->o_arg.u.verifier.data, verf,
822 sizeof(p->o_arg.u.verifier.data));
824 p->c_arg.fh = &p->o_res.fh;
825 p->c_arg.stateid = &p->o_res.stateid;
826 p->c_arg.seqid = p->o_arg.seqid;
827 nfs4_init_opendata_res(p);
837 static void nfs4_opendata_free(struct kref *kref)
839 struct nfs4_opendata *p = container_of(kref,
840 struct nfs4_opendata, kref);
841 struct super_block *sb = p->dentry->d_sb;
843 nfs_free_seqid(p->o_arg.seqid);
844 if (p->state != NULL)
845 nfs4_put_open_state(p->state);
846 nfs4_put_state_owner(p->owner);
850 nfs_fattr_free_names(&p->f_attr);
854 static void nfs4_opendata_put(struct nfs4_opendata *p)
857 kref_put(&p->kref, nfs4_opendata_free);
860 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
864 ret = rpc_wait_for_completion_task(task);
868 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
872 if (open_mode & (O_EXCL|O_TRUNC))
874 switch (mode & (FMODE_READ|FMODE_WRITE)) {
876 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
877 && state->n_rdonly != 0;
880 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
881 && state->n_wronly != 0;
883 case FMODE_READ|FMODE_WRITE:
884 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
885 && state->n_rdwr != 0;
891 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
893 if (delegation == NULL)
895 if ((delegation->type & fmode) != fmode)
897 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
899 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
901 nfs_mark_delegation_referenced(delegation);
905 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
914 case FMODE_READ|FMODE_WRITE:
917 nfs4_state_set_mode_locked(state, state->state | fmode);
920 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
922 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
923 nfs4_stateid_copy(&state->stateid, stateid);
924 nfs4_stateid_copy(&state->open_stateid, stateid);
927 set_bit(NFS_O_RDONLY_STATE, &state->flags);
930 set_bit(NFS_O_WRONLY_STATE, &state->flags);
932 case FMODE_READ|FMODE_WRITE:
933 set_bit(NFS_O_RDWR_STATE, &state->flags);
937 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
939 write_seqlock(&state->seqlock);
940 nfs_set_open_stateid_locked(state, stateid, fmode);
941 write_sequnlock(&state->seqlock);
944 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
947 * Protect the call to nfs4_state_set_mode_locked and
948 * serialise the stateid update
950 write_seqlock(&state->seqlock);
951 if (deleg_stateid != NULL) {
952 nfs4_stateid_copy(&state->stateid, deleg_stateid);
953 set_bit(NFS_DELEGATED_STATE, &state->flags);
955 if (open_stateid != NULL)
956 nfs_set_open_stateid_locked(state, open_stateid, fmode);
957 write_sequnlock(&state->seqlock);
958 spin_lock(&state->owner->so_lock);
959 update_open_stateflags(state, fmode);
960 spin_unlock(&state->owner->so_lock);
963 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
965 struct nfs_inode *nfsi = NFS_I(state->inode);
966 struct nfs_delegation *deleg_cur;
969 fmode &= (FMODE_READ|FMODE_WRITE);
972 deleg_cur = rcu_dereference(nfsi->delegation);
973 if (deleg_cur == NULL)
976 spin_lock(&deleg_cur->lock);
977 if (nfsi->delegation != deleg_cur ||
978 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
979 (deleg_cur->type & fmode) != fmode)
980 goto no_delegation_unlock;
982 if (delegation == NULL)
983 delegation = &deleg_cur->stateid;
984 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
985 goto no_delegation_unlock;
987 nfs_mark_delegation_referenced(deleg_cur);
988 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
990 no_delegation_unlock:
991 spin_unlock(&deleg_cur->lock);
995 if (!ret && open_stateid != NULL) {
996 __update_open_stateid(state, open_stateid, NULL, fmode);
1004 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1006 struct nfs_delegation *delegation;
1009 delegation = rcu_dereference(NFS_I(inode)->delegation);
1010 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1015 nfs4_inode_return_delegation(inode);
1018 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1020 struct nfs4_state *state = opendata->state;
1021 struct nfs_inode *nfsi = NFS_I(state->inode);
1022 struct nfs_delegation *delegation;
1023 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1024 fmode_t fmode = opendata->o_arg.fmode;
1025 nfs4_stateid stateid;
1029 if (can_open_cached(state, fmode, open_mode)) {
1030 spin_lock(&state->owner->so_lock);
1031 if (can_open_cached(state, fmode, open_mode)) {
1032 update_open_stateflags(state, fmode);
1033 spin_unlock(&state->owner->so_lock);
1034 goto out_return_state;
1036 spin_unlock(&state->owner->so_lock);
1039 delegation = rcu_dereference(nfsi->delegation);
1040 if (!can_open_delegated(delegation, fmode)) {
1044 /* Save the delegation */
1045 nfs4_stateid_copy(&stateid, &delegation->stateid);
1047 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1052 /* Try to update the stateid using the delegation */
1053 if (update_open_stateid(state, NULL, &stateid, fmode))
1054 goto out_return_state;
1057 return ERR_PTR(ret);
1059 atomic_inc(&state->count);
1064 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1066 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1067 struct nfs_delegation *delegation;
1068 int delegation_flags = 0;
1071 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1073 delegation_flags = delegation->flags;
1075 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1076 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1077 "returning a delegation for "
1078 "OPEN(CLAIM_DELEGATE_CUR)\n",
1080 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1081 nfs_inode_set_delegation(state->inode,
1082 data->owner->so_cred,
1085 nfs_inode_reclaim_delegation(state->inode,
1086 data->owner->so_cred,
1091 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1092 * and update the nfs4_state.
1094 static struct nfs4_state *
1095 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1097 struct inode *inode = data->state->inode;
1098 struct nfs4_state *state = data->state;
1101 if (!data->rpc_done) {
1102 ret = data->rpc_status;
1107 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1108 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1109 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1113 state = nfs4_get_open_state(inode, data->owner);
1117 ret = nfs_refresh_inode(inode, &data->f_attr);
1121 if (data->o_res.delegation_type != 0)
1122 nfs4_opendata_check_deleg(data, state);
1123 update_open_stateid(state, &data->o_res.stateid, NULL,
1128 return ERR_PTR(ret);
1132 static struct nfs4_state *
1133 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1135 struct inode *inode;
1136 struct nfs4_state *state = NULL;
1139 if (!data->rpc_done) {
1140 state = nfs4_try_open_cached(data);
1145 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1147 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1148 ret = PTR_ERR(inode);
1152 state = nfs4_get_open_state(inode, data->owner);
1155 if (data->o_res.delegation_type != 0)
1156 nfs4_opendata_check_deleg(data, state);
1157 update_open_stateid(state, &data->o_res.stateid, NULL,
1165 return ERR_PTR(ret);
1168 static struct nfs4_state *
1169 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1171 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1172 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1173 return _nfs4_opendata_to_nfs4_state(data);
1176 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1178 struct nfs_inode *nfsi = NFS_I(state->inode);
1179 struct nfs_open_context *ctx;
1181 spin_lock(&state->inode->i_lock);
1182 list_for_each_entry(ctx, &nfsi->open_files, list) {
1183 if (ctx->state != state)
1185 get_nfs_open_context(ctx);
1186 spin_unlock(&state->inode->i_lock);
1189 spin_unlock(&state->inode->i_lock);
1190 return ERR_PTR(-ENOENT);
1193 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1195 struct nfs4_opendata *opendata;
1197 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1198 if (opendata == NULL)
1199 return ERR_PTR(-ENOMEM);
1200 opendata->state = state;
1201 atomic_inc(&state->count);
1205 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1207 struct nfs4_state *newstate;
1210 opendata->o_arg.open_flags = 0;
1211 opendata->o_arg.fmode = fmode;
1212 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1213 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1214 nfs4_init_opendata_res(opendata);
1215 ret = _nfs4_recover_proc_open(opendata);
1218 newstate = nfs4_opendata_to_nfs4_state(opendata);
1219 if (IS_ERR(newstate))
1220 return PTR_ERR(newstate);
1221 nfs4_close_state(newstate, fmode);
1226 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1228 struct nfs4_state *newstate;
1231 /* memory barrier prior to reading state->n_* */
1232 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1234 if (state->n_rdwr != 0) {
1235 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1236 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1239 if (newstate != state)
1242 if (state->n_wronly != 0) {
1243 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1244 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1247 if (newstate != state)
1250 if (state->n_rdonly != 0) {
1251 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1252 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1255 if (newstate != state)
1259 * We may have performed cached opens for all three recoveries.
1260 * Check if we need to update the current stateid.
1262 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1263 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1264 write_seqlock(&state->seqlock);
1265 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1266 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1267 write_sequnlock(&state->seqlock);
1274 * reclaim state on the server after a reboot.
1276 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1278 struct nfs_delegation *delegation;
1279 struct nfs4_opendata *opendata;
1280 fmode_t delegation_type = 0;
1283 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1284 if (IS_ERR(opendata))
1285 return PTR_ERR(opendata);
1286 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1287 opendata->o_arg.fh = NFS_FH(state->inode);
1289 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1290 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1291 delegation_type = delegation->type;
1293 opendata->o_arg.u.delegation_type = delegation_type;
1294 status = nfs4_open_recover(opendata, state);
1295 nfs4_opendata_put(opendata);
1299 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1301 struct nfs_server *server = NFS_SERVER(state->inode);
1302 struct nfs4_exception exception = { };
1305 err = _nfs4_do_open_reclaim(ctx, state);
1306 if (err != -NFS4ERR_DELAY)
1308 nfs4_handle_exception(server, err, &exception);
1309 } while (exception.retry);
1313 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1315 struct nfs_open_context *ctx;
1318 ctx = nfs4_state_find_open_context(state);
1320 return PTR_ERR(ctx);
1321 ret = nfs4_do_open_reclaim(ctx, state);
1322 put_nfs_open_context(ctx);
1326 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1328 struct nfs4_opendata *opendata;
1331 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1332 if (IS_ERR(opendata))
1333 return PTR_ERR(opendata);
1334 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1335 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1336 ret = nfs4_open_recover(opendata, state);
1337 nfs4_opendata_put(opendata);
1341 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1343 struct nfs4_exception exception = { };
1344 struct nfs_server *server = NFS_SERVER(state->inode);
1347 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1353 case -NFS4ERR_BADSESSION:
1354 case -NFS4ERR_BADSLOT:
1355 case -NFS4ERR_BAD_HIGH_SLOT:
1356 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1357 case -NFS4ERR_DEADSESSION:
1358 set_bit(NFS_DELEGATED_STATE, &state->flags);
1359 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1362 case -NFS4ERR_STALE_CLIENTID:
1363 case -NFS4ERR_STALE_STATEID:
1364 set_bit(NFS_DELEGATED_STATE, &state->flags);
1365 case -NFS4ERR_EXPIRED:
1366 /* Don't recall a delegation if it was lost */
1367 nfs4_schedule_lease_recovery(server->nfs_client);
1370 case -NFS4ERR_DELEG_REVOKED:
1371 case -NFS4ERR_ADMIN_REVOKED:
1372 case -NFS4ERR_BAD_STATEID:
1373 nfs_inode_find_state_and_recover(state->inode,
1375 nfs4_schedule_stateid_recovery(server, state);
1380 set_bit(NFS_DELEGATED_STATE, &state->flags);
1381 err = nfs4_handle_exception(server, err, &exception);
1382 } while (exception.retry);
1387 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1389 struct nfs4_opendata *data = calldata;
1391 data->rpc_status = task->tk_status;
1392 if (data->rpc_status == 0) {
1393 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1394 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1395 renew_lease(data->o_res.server, data->timestamp);
1400 static void nfs4_open_confirm_release(void *calldata)
1402 struct nfs4_opendata *data = calldata;
1403 struct nfs4_state *state = NULL;
1405 /* If this request hasn't been cancelled, do nothing */
1406 if (data->cancelled == 0)
1408 /* In case of error, no cleanup! */
1409 if (!data->rpc_done)
1411 state = nfs4_opendata_to_nfs4_state(data);
1413 nfs4_close_state(state, data->o_arg.fmode);
1415 nfs4_opendata_put(data);
1418 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1419 .rpc_call_done = nfs4_open_confirm_done,
1420 .rpc_release = nfs4_open_confirm_release,
1424 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1426 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1428 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1429 struct rpc_task *task;
1430 struct rpc_message msg = {
1431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1432 .rpc_argp = &data->c_arg,
1433 .rpc_resp = &data->c_res,
1434 .rpc_cred = data->owner->so_cred,
1436 struct rpc_task_setup task_setup_data = {
1437 .rpc_client = server->client,
1438 .rpc_message = &msg,
1439 .callback_ops = &nfs4_open_confirm_ops,
1440 .callback_data = data,
1441 .workqueue = nfsiod_workqueue,
1442 .flags = RPC_TASK_ASYNC,
1446 kref_get(&data->kref);
1448 data->rpc_status = 0;
1449 data->timestamp = jiffies;
1450 task = rpc_run_task(&task_setup_data);
1452 return PTR_ERR(task);
1453 status = nfs4_wait_for_completion_rpc_task(task);
1455 data->cancelled = 1;
1458 status = data->rpc_status;
1463 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1465 struct nfs4_opendata *data = calldata;
1466 struct nfs4_state_owner *sp = data->owner;
1468 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1471 * Check if we still need to send an OPEN call, or if we can use
1472 * a delegation instead.
1474 if (data->state != NULL) {
1475 struct nfs_delegation *delegation;
1477 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1480 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1481 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1482 can_open_delegated(delegation, data->o_arg.fmode))
1483 goto unlock_no_action;
1486 /* Update client id. */
1487 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1488 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1489 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1490 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1491 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1493 data->timestamp = jiffies;
1494 if (nfs4_setup_sequence(data->o_arg.server,
1495 &data->o_arg.seq_args,
1496 &data->o_res.seq_res,
1498 nfs_release_seqid(data->o_arg.seqid);
1503 task->tk_action = NULL;
1504 nfs4_sequence_done(task, &data->o_res.seq_res);
1507 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1509 struct nfs4_opendata *data = calldata;
1511 data->rpc_status = task->tk_status;
1513 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1516 if (task->tk_status == 0) {
1517 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1518 switch (data->o_res.f_attr->mode & S_IFMT) {
1522 data->rpc_status = -ELOOP;
1525 data->rpc_status = -EISDIR;
1528 data->rpc_status = -ENOTDIR;
1531 renew_lease(data->o_res.server, data->timestamp);
1532 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1533 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1538 static void nfs4_open_release(void *calldata)
1540 struct nfs4_opendata *data = calldata;
1541 struct nfs4_state *state = NULL;
1543 /* If this request hasn't been cancelled, do nothing */
1544 if (data->cancelled == 0)
1546 /* In case of error, no cleanup! */
1547 if (data->rpc_status != 0 || !data->rpc_done)
1549 /* In case we need an open_confirm, no cleanup! */
1550 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1552 state = nfs4_opendata_to_nfs4_state(data);
1554 nfs4_close_state(state, data->o_arg.fmode);
1556 nfs4_opendata_put(data);
1559 static const struct rpc_call_ops nfs4_open_ops = {
1560 .rpc_call_prepare = nfs4_open_prepare,
1561 .rpc_call_done = nfs4_open_done,
1562 .rpc_release = nfs4_open_release,
1565 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1567 struct inode *dir = data->dir->d_inode;
1568 struct nfs_server *server = NFS_SERVER(dir);
1569 struct nfs_openargs *o_arg = &data->o_arg;
1570 struct nfs_openres *o_res = &data->o_res;
1571 struct rpc_task *task;
1572 struct rpc_message msg = {
1573 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1576 .rpc_cred = data->owner->so_cred,
1578 struct rpc_task_setup task_setup_data = {
1579 .rpc_client = server->client,
1580 .rpc_message = &msg,
1581 .callback_ops = &nfs4_open_ops,
1582 .callback_data = data,
1583 .workqueue = nfsiod_workqueue,
1584 .flags = RPC_TASK_ASYNC,
1588 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1589 kref_get(&data->kref);
1591 data->rpc_status = 0;
1592 data->cancelled = 0;
1594 nfs4_set_sequence_privileged(&o_arg->seq_args);
1595 task = rpc_run_task(&task_setup_data);
1597 return PTR_ERR(task);
1598 status = nfs4_wait_for_completion_rpc_task(task);
1600 data->cancelled = 1;
1603 status = data->rpc_status;
1609 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1611 struct inode *dir = data->dir->d_inode;
1612 struct nfs_openres *o_res = &data->o_res;
1615 status = nfs4_run_open_task(data, 1);
1616 if (status != 0 || !data->rpc_done)
1619 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1621 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1622 status = _nfs4_proc_open_confirm(data);
1630 static int nfs4_opendata_access(struct rpc_cred *cred,
1631 struct nfs4_opendata *opendata,
1632 struct nfs4_state *state, fmode_t fmode,
1635 struct nfs_access_entry cache;
1638 /* access call failed or for some reason the server doesn't
1639 * support any access modes -- defer access call until later */
1640 if (opendata->o_res.access_supported == 0)
1644 /* don't check MAY_WRITE - a newly created file may not have
1645 * write mode bits, but POSIX allows the creating process to write.
1646 * use openflags to check for exec, because fmode won't
1647 * always have FMODE_EXEC set when file open for exec. */
1648 if (openflags & __FMODE_EXEC) {
1649 /* ONLY check for exec rights */
1651 } else if (fmode & FMODE_READ)
1655 cache.jiffies = jiffies;
1656 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1657 nfs_access_add_cache(state->inode, &cache);
1659 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1662 /* even though OPEN succeeded, access is denied. Close the file */
1663 nfs4_close_state(state, fmode);
1668 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1670 static int _nfs4_proc_open(struct nfs4_opendata *data)
1672 struct inode *dir = data->dir->d_inode;
1673 struct nfs_server *server = NFS_SERVER(dir);
1674 struct nfs_openargs *o_arg = &data->o_arg;
1675 struct nfs_openres *o_res = &data->o_res;
1678 status = nfs4_run_open_task(data, 0);
1679 if (!data->rpc_done)
1682 if (status == -NFS4ERR_BADNAME &&
1683 !(o_arg->open_flags & O_CREAT))
1688 nfs_fattr_map_and_free_names(server, &data->f_attr);
1690 if (o_arg->open_flags & O_CREAT)
1691 update_changeattr(dir, &o_res->cinfo);
1692 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1693 server->caps &= ~NFS_CAP_POSIX_LOCK;
1694 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1695 status = _nfs4_proc_open_confirm(data);
1699 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1700 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1704 static int nfs4_recover_expired_lease(struct nfs_server *server)
1706 return nfs4_client_recover_expired_lease(server->nfs_client);
1711 * reclaim state on the server after a network partition.
1712 * Assumes caller holds the appropriate lock
1714 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1716 struct nfs4_opendata *opendata;
1719 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1720 if (IS_ERR(opendata))
1721 return PTR_ERR(opendata);
1722 ret = nfs4_open_recover(opendata, state);
1724 d_drop(ctx->dentry);
1725 nfs4_opendata_put(opendata);
1729 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1731 struct nfs_server *server = NFS_SERVER(state->inode);
1732 struct nfs4_exception exception = { };
1736 err = _nfs4_open_expired(ctx, state);
1740 case -NFS4ERR_GRACE:
1741 case -NFS4ERR_DELAY:
1742 nfs4_handle_exception(server, err, &exception);
1745 } while (exception.retry);
1750 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1752 struct nfs_open_context *ctx;
1755 ctx = nfs4_state_find_open_context(state);
1757 return PTR_ERR(ctx);
1758 ret = nfs4_do_open_expired(ctx, state);
1759 put_nfs_open_context(ctx);
1763 #if defined(CONFIG_NFS_V4_1)
1764 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1766 struct nfs_server *server = NFS_SERVER(state->inode);
1767 nfs4_stateid *stateid = &state->stateid;
1770 /* If a state reset has been done, test_stateid is unneeded */
1771 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1774 status = nfs41_test_stateid(server, stateid);
1775 if (status != NFS_OK) {
1776 /* Free the stateid unless the server explicitly
1777 * informs us the stateid is unrecognized. */
1778 if (status != -NFS4ERR_BAD_STATEID)
1779 nfs41_free_stateid(server, stateid);
1780 nfs_remove_bad_delegation(state->inode);
1782 write_seqlock(&state->seqlock);
1783 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1784 write_sequnlock(&state->seqlock);
1785 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1790 * nfs41_check_open_stateid - possibly free an open stateid
1792 * @state: NFSv4 state for an inode
1794 * Returns NFS_OK if recovery for this stateid is now finished.
1795 * Otherwise a negative NFS4ERR value is returned.
1797 static int nfs41_check_open_stateid(struct nfs4_state *state)
1799 struct nfs_server *server = NFS_SERVER(state->inode);
1800 nfs4_stateid *stateid = &state->open_stateid;
1803 /* If a state reset has been done, test_stateid is unneeded */
1804 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1805 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1806 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1807 return -NFS4ERR_BAD_STATEID;
1809 status = nfs41_test_stateid(server, stateid);
1810 if (status != NFS_OK) {
1811 /* Free the stateid unless the server explicitly
1812 * informs us the stateid is unrecognized. */
1813 if (status != -NFS4ERR_BAD_STATEID)
1814 nfs41_free_stateid(server, stateid);
1816 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1817 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1818 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1823 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1827 nfs41_clear_delegation_stateid(state);
1828 status = nfs41_check_open_stateid(state);
1829 if (status != NFS_OK)
1830 status = nfs4_open_expired(sp, state);
1836 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1837 * fields corresponding to attributes that were used to store the verifier.
1838 * Make sure we clobber those fields in the later setattr call
1840 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1842 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1843 !(sattr->ia_valid & ATTR_ATIME_SET))
1844 sattr->ia_valid |= ATTR_ATIME;
1846 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1847 !(sattr->ia_valid & ATTR_MTIME_SET))
1848 sattr->ia_valid |= ATTR_MTIME;
1851 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1854 struct nfs4_state **res)
1856 struct nfs4_state_owner *sp = opendata->owner;
1857 struct nfs_server *server = sp->so_server;
1858 struct nfs4_state *state;
1862 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1864 ret = _nfs4_proc_open(opendata);
1868 state = nfs4_opendata_to_nfs4_state(opendata);
1869 ret = PTR_ERR(state);
1872 if (server->caps & NFS_CAP_POSIX_LOCK)
1873 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1875 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1879 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
1880 nfs4_schedule_stateid_recovery(server, state);
1881 nfs4_wait_clnt_recover(server->nfs_client);
1889 * Returns a referenced nfs4_state
1891 static int _nfs4_do_open(struct inode *dir,
1892 struct dentry *dentry,
1895 struct iattr *sattr,
1896 struct rpc_cred *cred,
1897 struct nfs4_state **res,
1898 struct nfs4_threshold **ctx_th)
1900 struct nfs4_state_owner *sp;
1901 struct nfs4_state *state = NULL;
1902 struct nfs_server *server = NFS_SERVER(dir);
1903 struct nfs4_opendata *opendata;
1906 /* Protect against reboot recovery conflicts */
1908 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1910 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1913 status = nfs4_recover_expired_lease(server);
1915 goto err_put_state_owner;
1916 if (dentry->d_inode != NULL)
1917 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1919 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1920 if (opendata == NULL)
1921 goto err_put_state_owner;
1923 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1924 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1925 if (!opendata->f_attr.mdsthreshold)
1926 goto err_opendata_put;
1927 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
1929 if (dentry->d_inode != NULL)
1930 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1932 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
1934 goto err_opendata_put;
1936 if (opendata->o_arg.open_flags & O_EXCL) {
1937 nfs4_exclusive_attrset(opendata, sattr);
1939 nfs_fattr_init(opendata->o_res.f_attr);
1940 status = nfs4_do_setattr(state->inode, cred,
1941 opendata->o_res.f_attr, sattr,
1944 nfs_setattr_update_inode(state->inode, sattr);
1945 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1948 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1949 *ctx_th = opendata->f_attr.mdsthreshold;
1951 kfree(opendata->f_attr.mdsthreshold);
1952 opendata->f_attr.mdsthreshold = NULL;
1954 nfs4_opendata_put(opendata);
1955 nfs4_put_state_owner(sp);
1959 kfree(opendata->f_attr.mdsthreshold);
1960 nfs4_opendata_put(opendata);
1961 err_put_state_owner:
1962 nfs4_put_state_owner(sp);
1969 static struct nfs4_state *nfs4_do_open(struct inode *dir,
1970 struct dentry *dentry,
1973 struct iattr *sattr,
1974 struct rpc_cred *cred,
1975 struct nfs4_threshold **ctx_th)
1977 struct nfs4_exception exception = { };
1978 struct nfs4_state *res;
1981 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1983 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1987 /* NOTE: BAD_SEQID means the server and client disagree about the
1988 * book-keeping w.r.t. state-changing operations
1989 * (OPEN/CLOSE/LOCK/LOCKU...)
1990 * It is actually a sign of a bug on the client or on the server.
1992 * If we receive a BAD_SEQID error in the particular case of
1993 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1994 * have unhashed the old state_owner for us, and that we can
1995 * therefore safely retry using a new one. We should still warn
1996 * the user though...
1998 if (status == -NFS4ERR_BAD_SEQID) {
1999 pr_warn_ratelimited("NFS: v4 server %s "
2000 " returned a bad sequence-id error!\n",
2001 NFS_SERVER(dir)->nfs_client->cl_hostname);
2002 exception.retry = 1;
2006 * BAD_STATEID on OPEN means that the server cancelled our
2007 * state before it received the OPEN_CONFIRM.
2008 * Recover by retrying the request as per the discussion
2009 * on Page 181 of RFC3530.
2011 if (status == -NFS4ERR_BAD_STATEID) {
2012 exception.retry = 1;
2015 if (status == -EAGAIN) {
2016 /* We must have found a delegation */
2017 exception.retry = 1;
2020 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2021 status, &exception));
2022 } while (exception.retry);
2026 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2027 struct nfs_fattr *fattr, struct iattr *sattr,
2028 struct nfs4_state *state)
2030 struct nfs_server *server = NFS_SERVER(inode);
2031 struct nfs_setattrargs arg = {
2032 .fh = NFS_FH(inode),
2035 .bitmask = server->attr_bitmask,
2037 struct nfs_setattrres res = {
2041 struct rpc_message msg = {
2042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2047 unsigned long timestamp = jiffies;
2050 nfs_fattr_init(fattr);
2052 if (state != NULL) {
2053 struct nfs_lockowner lockowner = {
2054 .l_owner = current->files,
2055 .l_pid = current->tgid,
2057 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2059 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2061 /* Use that stateid */
2063 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2065 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2066 if (status == 0 && state != NULL)
2067 renew_lease(server, timestamp);
2071 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2072 struct nfs_fattr *fattr, struct iattr *sattr,
2073 struct nfs4_state *state)
2075 struct nfs_server *server = NFS_SERVER(inode);
2076 struct nfs4_exception exception = {
2082 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2084 case -NFS4ERR_OPENMODE:
2085 if (state && !(state->state & FMODE_WRITE)) {
2087 if (sattr->ia_valid & ATTR_OPEN)
2092 err = nfs4_handle_exception(server, err, &exception);
2093 } while (exception.retry);
2098 struct nfs4_closedata {
2099 struct inode *inode;
2100 struct nfs4_state *state;
2101 struct nfs_closeargs arg;
2102 struct nfs_closeres res;
2103 struct nfs_fattr fattr;
2104 unsigned long timestamp;
2109 static void nfs4_free_closedata(void *data)
2111 struct nfs4_closedata *calldata = data;
2112 struct nfs4_state_owner *sp = calldata->state->owner;
2113 struct super_block *sb = calldata->state->inode->i_sb;
2116 pnfs_roc_release(calldata->state->inode);
2117 nfs4_put_open_state(calldata->state);
2118 nfs_free_seqid(calldata->arg.seqid);
2119 nfs4_put_state_owner(sp);
2120 nfs_sb_deactive(sb);
2124 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2127 spin_lock(&state->owner->so_lock);
2128 if (!(fmode & FMODE_READ))
2129 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2130 if (!(fmode & FMODE_WRITE))
2131 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2132 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2133 spin_unlock(&state->owner->so_lock);
2136 static void nfs4_close_done(struct rpc_task *task, void *data)
2138 struct nfs4_closedata *calldata = data;
2139 struct nfs4_state *state = calldata->state;
2140 struct nfs_server *server = NFS_SERVER(calldata->inode);
2142 dprintk("%s: begin!\n", __func__);
2143 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2145 /* hmm. we are done with the inode, and in the process of freeing
2146 * the state_owner. we keep this around to process errors
2148 switch (task->tk_status) {
2151 pnfs_roc_set_barrier(state->inode,
2152 calldata->roc_barrier);
2153 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2154 renew_lease(server, calldata->timestamp);
2155 nfs4_close_clear_stateid_flags(state,
2156 calldata->arg.fmode);
2158 case -NFS4ERR_STALE_STATEID:
2159 case -NFS4ERR_OLD_STATEID:
2160 case -NFS4ERR_BAD_STATEID:
2161 case -NFS4ERR_EXPIRED:
2162 if (calldata->arg.fmode == 0)
2165 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2166 rpc_restart_call_prepare(task);
2168 nfs_release_seqid(calldata->arg.seqid);
2169 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2170 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2173 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2175 struct nfs4_closedata *calldata = data;
2176 struct nfs4_state *state = calldata->state;
2177 struct inode *inode = calldata->inode;
2180 dprintk("%s: begin!\n", __func__);
2181 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2184 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2185 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2186 spin_lock(&state->owner->so_lock);
2187 /* Calculate the change in open mode */
2188 if (state->n_rdwr == 0) {
2189 if (state->n_rdonly == 0) {
2190 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2191 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2192 calldata->arg.fmode &= ~FMODE_READ;
2194 if (state->n_wronly == 0) {
2195 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2196 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2197 calldata->arg.fmode &= ~FMODE_WRITE;
2200 spin_unlock(&state->owner->so_lock);
2203 /* Note: exit _without_ calling nfs4_close_done */
2204 task->tk_action = NULL;
2205 nfs4_sequence_done(task, &calldata->res.seq_res);
2209 if (calldata->arg.fmode == 0) {
2210 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2211 if (calldata->roc &&
2212 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
2216 nfs_fattr_init(calldata->res.fattr);
2217 calldata->timestamp = jiffies;
2218 if (nfs4_setup_sequence(NFS_SERVER(inode),
2219 &calldata->arg.seq_args,
2220 &calldata->res.seq_res,
2222 nfs_release_seqid(calldata->arg.seqid);
2224 dprintk("%s: done!\n", __func__);
2227 static const struct rpc_call_ops nfs4_close_ops = {
2228 .rpc_call_prepare = nfs4_close_prepare,
2229 .rpc_call_done = nfs4_close_done,
2230 .rpc_release = nfs4_free_closedata,
2234 * It is possible for data to be read/written from a mem-mapped file
2235 * after the sys_close call (which hits the vfs layer as a flush).
2236 * This means that we can't safely call nfsv4 close on a file until
2237 * the inode is cleared. This in turn means that we are not good
2238 * NFSv4 citizens - we do not indicate to the server to update the file's
2239 * share state even when we are done with one of the three share
2240 * stateid's in the inode.
2242 * NOTE: Caller must be holding the sp->so_owner semaphore!
2244 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2246 struct nfs_server *server = NFS_SERVER(state->inode);
2247 struct nfs4_closedata *calldata;
2248 struct nfs4_state_owner *sp = state->owner;
2249 struct rpc_task *task;
2250 struct rpc_message msg = {
2251 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2252 .rpc_cred = state->owner->so_cred,
2254 struct rpc_task_setup task_setup_data = {
2255 .rpc_client = server->client,
2256 .rpc_message = &msg,
2257 .callback_ops = &nfs4_close_ops,
2258 .workqueue = nfsiod_workqueue,
2259 .flags = RPC_TASK_ASYNC,
2261 int status = -ENOMEM;
2263 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2264 if (calldata == NULL)
2266 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2267 calldata->inode = state->inode;
2268 calldata->state = state;
2269 calldata->arg.fh = NFS_FH(state->inode);
2270 calldata->arg.stateid = &state->open_stateid;
2271 /* Serialization for the sequence id */
2272 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2273 if (calldata->arg.seqid == NULL)
2274 goto out_free_calldata;
2275 calldata->arg.fmode = 0;
2276 calldata->arg.bitmask = server->cache_consistency_bitmask;
2277 calldata->res.fattr = &calldata->fattr;
2278 calldata->res.seqid = calldata->arg.seqid;
2279 calldata->res.server = server;
2280 calldata->roc = pnfs_roc(state->inode);
2281 nfs_sb_active(calldata->inode->i_sb);
2283 msg.rpc_argp = &calldata->arg;
2284 msg.rpc_resp = &calldata->res;
2285 task_setup_data.callback_data = calldata;
2286 task = rpc_run_task(&task_setup_data);
2288 return PTR_ERR(task);
2291 status = rpc_wait_for_completion_task(task);
2297 nfs4_put_open_state(state);
2298 nfs4_put_state_owner(sp);
2302 static struct inode *
2303 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2305 struct nfs4_state *state;
2307 /* Protect against concurrent sillydeletes */
2308 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2309 ctx->cred, &ctx->mdsthreshold);
2311 return ERR_CAST(state);
2313 return igrab(state->inode);
2316 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2318 if (ctx->state == NULL)
2321 nfs4_close_sync(ctx->state, ctx->mode);
2323 nfs4_close_state(ctx->state, ctx->mode);
2326 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2328 struct nfs4_server_caps_arg args = {
2331 struct nfs4_server_caps_res res = {};
2332 struct rpc_message msg = {
2333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2339 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2341 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2342 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2343 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2344 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2345 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2346 NFS_CAP_CTIME|NFS_CAP_MTIME);
2347 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2348 server->caps |= NFS_CAP_ACLS;
2349 if (res.has_links != 0)
2350 server->caps |= NFS_CAP_HARDLINKS;
2351 if (res.has_symlinks != 0)
2352 server->caps |= NFS_CAP_SYMLINKS;
2353 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2354 server->caps |= NFS_CAP_FILEID;
2355 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2356 server->caps |= NFS_CAP_MODE;
2357 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2358 server->caps |= NFS_CAP_NLINK;
2359 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2360 server->caps |= NFS_CAP_OWNER;
2361 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2362 server->caps |= NFS_CAP_OWNER_GROUP;
2363 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2364 server->caps |= NFS_CAP_ATIME;
2365 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2366 server->caps |= NFS_CAP_CTIME;
2367 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2368 server->caps |= NFS_CAP_MTIME;
2370 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2371 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2372 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2373 server->acl_bitmask = res.acl_bitmask;
2374 server->fh_expire_type = res.fh_expire_type;
2380 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2382 struct nfs4_exception exception = { };
2385 err = nfs4_handle_exception(server,
2386 _nfs4_server_capabilities(server, fhandle),
2388 } while (exception.retry);
2392 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2393 struct nfs_fsinfo *info)
2395 struct nfs4_lookup_root_arg args = {
2396 .bitmask = nfs4_fattr_bitmap,
2398 struct nfs4_lookup_res res = {
2400 .fattr = info->fattr,
2403 struct rpc_message msg = {
2404 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2409 nfs_fattr_init(info->fattr);
2410 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2413 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2414 struct nfs_fsinfo *info)
2416 struct nfs4_exception exception = { };
2419 err = _nfs4_lookup_root(server, fhandle, info);
2422 case -NFS4ERR_WRONGSEC:
2425 err = nfs4_handle_exception(server, err, &exception);
2427 } while (exception.retry);
2432 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2433 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2435 struct rpc_auth *auth;
2438 auth = rpcauth_create(flavor, server->client);
2443 ret = nfs4_lookup_root(server, fhandle, info);
2448 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2449 struct nfs_fsinfo *info)
2451 int i, len, status = 0;
2452 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2454 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2458 for (i = 0; i < len; i++) {
2459 /* AUTH_UNIX is the default flavor if none was specified,
2460 * thus has already been tried. */
2461 if (flav_array[i] == RPC_AUTH_UNIX)
2464 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2465 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2470 * -EACCESS could mean that the user doesn't have correct permissions
2471 * to access the mount. It could also mean that we tried to mount
2472 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2473 * existing mount programs don't handle -EACCES very well so it should
2474 * be mapped to -EPERM instead.
2476 if (status == -EACCES)
2482 * get the file handle for the "/" directory on the server
2484 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2485 struct nfs_fsinfo *info)
2487 int minor_version = server->nfs_client->cl_minorversion;
2488 int status = nfs4_lookup_root(server, fhandle, info);
2489 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2491 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2492 * by nfs4_map_errors() as this function exits.
2494 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2496 status = nfs4_server_capabilities(server, fhandle);
2498 status = nfs4_do_fsinfo(server, fhandle, info);
2499 return nfs4_map_errors(status);
2502 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2503 struct nfs_fsinfo *info)
2506 struct nfs_fattr *fattr = info->fattr;
2508 error = nfs4_server_capabilities(server, mntfh);
2510 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2514 error = nfs4_proc_getattr(server, mntfh, fattr);
2516 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2520 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2521 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2522 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2528 * Get locations and (maybe) other attributes of a referral.
2529 * Note that we'll actually follow the referral later when
2530 * we detect fsid mismatch in inode revalidation
2532 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2533 const struct qstr *name, struct nfs_fattr *fattr,
2534 struct nfs_fh *fhandle)
2536 int status = -ENOMEM;
2537 struct page *page = NULL;
2538 struct nfs4_fs_locations *locations = NULL;
2540 page = alloc_page(GFP_KERNEL);
2543 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2544 if (locations == NULL)
2547 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2550 /* Make sure server returned a different fsid for the referral */
2551 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2552 dprintk("%s: server did not return a different fsid for"
2553 " a referral at %s\n", __func__, name->name);
2557 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2558 nfs_fixup_referral_attributes(&locations->fattr);
2560 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2561 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2562 memset(fhandle, 0, sizeof(struct nfs_fh));
2570 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2572 struct nfs4_getattr_arg args = {
2574 .bitmask = server->attr_bitmask,
2576 struct nfs4_getattr_res res = {
2580 struct rpc_message msg = {
2581 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2586 nfs_fattr_init(fattr);
2587 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2590 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2592 struct nfs4_exception exception = { };
2595 err = nfs4_handle_exception(server,
2596 _nfs4_proc_getattr(server, fhandle, fattr),
2598 } while (exception.retry);
2603 * The file is not closed if it is opened due to the a request to change
2604 * the size of the file. The open call will not be needed once the
2605 * VFS layer lookup-intents are implemented.
2607 * Close is called when the inode is destroyed.
2608 * If we haven't opened the file for O_WRONLY, we
2609 * need to in the size_change case to obtain a stateid.
2612 * Because OPEN is always done by name in nfsv4, it is
2613 * possible that we opened a different file by the same
2614 * name. We can recognize this race condition, but we
2615 * can't do anything about it besides returning an error.
2617 * This will be fixed with VFS changes (lookup-intent).
2620 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2621 struct iattr *sattr)
2623 struct inode *inode = dentry->d_inode;
2624 struct rpc_cred *cred = NULL;
2625 struct nfs4_state *state = NULL;
2628 if (pnfs_ld_layoutret_on_setattr(inode))
2629 pnfs_return_layout(inode);
2631 nfs_fattr_init(fattr);
2633 /* Deal with open(O_TRUNC) */
2634 if (sattr->ia_valid & ATTR_OPEN)
2635 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2637 /* Optimization: if the end result is no change, don't RPC */
2638 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2641 /* Search for an existing open(O_WRITE) file */
2642 if (sattr->ia_valid & ATTR_FILE) {
2643 struct nfs_open_context *ctx;
2645 ctx = nfs_file_open_context(sattr->ia_file);
2652 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2654 nfs_setattr_update_inode(inode, sattr);
2658 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2659 const struct qstr *name, struct nfs_fh *fhandle,
2660 struct nfs_fattr *fattr)
2662 struct nfs_server *server = NFS_SERVER(dir);
2664 struct nfs4_lookup_arg args = {
2665 .bitmask = server->attr_bitmask,
2666 .dir_fh = NFS_FH(dir),
2669 struct nfs4_lookup_res res = {
2674 struct rpc_message msg = {
2675 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2680 nfs_fattr_init(fattr);
2682 dprintk("NFS call lookup %s\n", name->name);
2683 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2684 dprintk("NFS reply lookup: %d\n", status);
2688 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2690 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2691 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2692 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2696 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2697 struct qstr *name, struct nfs_fh *fhandle,
2698 struct nfs_fattr *fattr)
2700 struct nfs4_exception exception = { };
2701 struct rpc_clnt *client = *clnt;
2704 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2706 case -NFS4ERR_BADNAME:
2709 case -NFS4ERR_MOVED:
2710 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2712 case -NFS4ERR_WRONGSEC:
2714 if (client != *clnt)
2717 client = nfs4_create_sec_client(client, dir, name);
2719 return PTR_ERR(client);
2721 exception.retry = 1;
2724 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2726 } while (exception.retry);
2731 else if (client != *clnt)
2732 rpc_shutdown_client(client);
2737 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2738 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2741 struct rpc_clnt *client = NFS_CLIENT(dir);
2743 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2744 if (client != NFS_CLIENT(dir)) {
2745 rpc_shutdown_client(client);
2746 nfs_fixup_secinfo_attributes(fattr);
2752 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2753 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2756 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2758 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2760 rpc_shutdown_client(client);
2761 return ERR_PTR(status);
2766 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2768 struct nfs_server *server = NFS_SERVER(inode);
2769 struct nfs4_accessargs args = {
2770 .fh = NFS_FH(inode),
2771 .bitmask = server->cache_consistency_bitmask,
2773 struct nfs4_accessres res = {
2776 struct rpc_message msg = {
2777 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2780 .rpc_cred = entry->cred,
2782 int mode = entry->mask;
2786 * Determine which access bits we want to ask for...
2788 if (mode & MAY_READ)
2789 args.access |= NFS4_ACCESS_READ;
2790 if (S_ISDIR(inode->i_mode)) {
2791 if (mode & MAY_WRITE)
2792 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2793 if (mode & MAY_EXEC)
2794 args.access |= NFS4_ACCESS_LOOKUP;
2796 if (mode & MAY_WRITE)
2797 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2798 if (mode & MAY_EXEC)
2799 args.access |= NFS4_ACCESS_EXECUTE;
2802 res.fattr = nfs_alloc_fattr();
2803 if (res.fattr == NULL)
2806 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2808 nfs_access_set_mask(entry, res.access);
2809 nfs_refresh_inode(inode, res.fattr);
2811 nfs_free_fattr(res.fattr);
2815 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2817 struct nfs4_exception exception = { };
2820 err = nfs4_handle_exception(NFS_SERVER(inode),
2821 _nfs4_proc_access(inode, entry),
2823 } while (exception.retry);
2828 * TODO: For the time being, we don't try to get any attributes
2829 * along with any of the zero-copy operations READ, READDIR,
2832 * In the case of the first three, we want to put the GETATTR
2833 * after the read-type operation -- this is because it is hard
2834 * to predict the length of a GETATTR response in v4, and thus
2835 * align the READ data correctly. This means that the GETATTR
2836 * may end up partially falling into the page cache, and we should
2837 * shift it into the 'tail' of the xdr_buf before processing.
2838 * To do this efficiently, we need to know the total length
2839 * of data received, which doesn't seem to be available outside
2842 * In the case of WRITE, we also want to put the GETATTR after
2843 * the operation -- in this case because we want to make sure
2844 * we get the post-operation mtime and size.
2846 * Both of these changes to the XDR layer would in fact be quite
2847 * minor, but I decided to leave them for a subsequent patch.
2849 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2850 unsigned int pgbase, unsigned int pglen)
2852 struct nfs4_readlink args = {
2853 .fh = NFS_FH(inode),
2858 struct nfs4_readlink_res res;
2859 struct rpc_message msg = {
2860 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2865 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2868 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2869 unsigned int pgbase, unsigned int pglen)
2871 struct nfs4_exception exception = { };
2874 err = nfs4_handle_exception(NFS_SERVER(inode),
2875 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2877 } while (exception.retry);
2882 * This is just for mknod. open(O_CREAT) will always do ->open_context().
2885 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2888 struct nfs_open_context *ctx;
2889 struct nfs4_state *state;
2892 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2894 return PTR_ERR(ctx);
2896 sattr->ia_mode &= ~current_umask();
2897 state = nfs4_do_open(dir, dentry, ctx->mode,
2898 flags, sattr, ctx->cred,
2899 &ctx->mdsthreshold);
2901 if (IS_ERR(state)) {
2902 status = PTR_ERR(state);
2905 d_add(dentry, igrab(state->inode));
2906 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2909 put_nfs_open_context(ctx);
2913 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2915 struct nfs_server *server = NFS_SERVER(dir);
2916 struct nfs_removeargs args = {
2920 struct nfs_removeres res = {
2923 struct rpc_message msg = {
2924 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2930 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2932 update_changeattr(dir, &res.cinfo);
2936 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2938 struct nfs4_exception exception = { };
2941 err = nfs4_handle_exception(NFS_SERVER(dir),
2942 _nfs4_proc_remove(dir, name),
2944 } while (exception.retry);
2948 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2950 struct nfs_server *server = NFS_SERVER(dir);
2951 struct nfs_removeargs *args = msg->rpc_argp;
2952 struct nfs_removeres *res = msg->rpc_resp;
2954 res->server = server;
2955 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2956 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2959 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2961 nfs4_setup_sequence(NFS_SERVER(data->dir),
2962 &data->args.seq_args,
2967 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2969 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2971 if (!nfs4_sequence_done(task, &res->seq_res))
2973 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2975 update_changeattr(dir, &res->cinfo);
2979 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2981 struct nfs_server *server = NFS_SERVER(dir);
2982 struct nfs_renameargs *arg = msg->rpc_argp;
2983 struct nfs_renameres *res = msg->rpc_resp;
2985 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2986 res->server = server;
2987 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2990 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2992 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2993 &data->args.seq_args,
2998 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2999 struct inode *new_dir)
3001 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3003 if (!nfs4_sequence_done(task, &res->seq_res))
3005 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3008 update_changeattr(old_dir, &res->old_cinfo);
3009 update_changeattr(new_dir, &res->new_cinfo);
3013 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3014 struct inode *new_dir, struct qstr *new_name)
3016 struct nfs_server *server = NFS_SERVER(old_dir);
3017 struct nfs_renameargs arg = {
3018 .old_dir = NFS_FH(old_dir),
3019 .new_dir = NFS_FH(new_dir),
3020 .old_name = old_name,
3021 .new_name = new_name,
3023 struct nfs_renameres res = {
3026 struct rpc_message msg = {
3027 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3031 int status = -ENOMEM;
3033 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3035 update_changeattr(old_dir, &res.old_cinfo);
3036 update_changeattr(new_dir, &res.new_cinfo);
3041 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3042 struct inode *new_dir, struct qstr *new_name)
3044 struct nfs4_exception exception = { };
3047 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3048 _nfs4_proc_rename(old_dir, old_name,
3051 } while (exception.retry);
3055 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3057 struct nfs_server *server = NFS_SERVER(inode);
3058 struct nfs4_link_arg arg = {
3059 .fh = NFS_FH(inode),
3060 .dir_fh = NFS_FH(dir),
3062 .bitmask = server->attr_bitmask,
3064 struct nfs4_link_res res = {
3067 struct rpc_message msg = {
3068 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3072 int status = -ENOMEM;
3074 res.fattr = nfs_alloc_fattr();
3075 if (res.fattr == NULL)
3078 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3080 update_changeattr(dir, &res.cinfo);
3081 nfs_post_op_update_inode(inode, res.fattr);
3084 nfs_free_fattr(res.fattr);
3088 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3090 struct nfs4_exception exception = { };
3093 err = nfs4_handle_exception(NFS_SERVER(inode),
3094 _nfs4_proc_link(inode, dir, name),
3096 } while (exception.retry);
3100 struct nfs4_createdata {
3101 struct rpc_message msg;
3102 struct nfs4_create_arg arg;
3103 struct nfs4_create_res res;
3105 struct nfs_fattr fattr;
3108 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3109 struct qstr *name, struct iattr *sattr, u32 ftype)
3111 struct nfs4_createdata *data;
3113 data = kzalloc(sizeof(*data), GFP_KERNEL);
3115 struct nfs_server *server = NFS_SERVER(dir);
3117 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3118 data->msg.rpc_argp = &data->arg;
3119 data->msg.rpc_resp = &data->res;
3120 data->arg.dir_fh = NFS_FH(dir);
3121 data->arg.server = server;
3122 data->arg.name = name;
3123 data->arg.attrs = sattr;
3124 data->arg.ftype = ftype;
3125 data->arg.bitmask = server->attr_bitmask;
3126 data->res.server = server;
3127 data->res.fh = &data->fh;
3128 data->res.fattr = &data->fattr;
3129 nfs_fattr_init(data->res.fattr);
3134 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3136 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3137 &data->arg.seq_args, &data->res.seq_res, 1);
3139 update_changeattr(dir, &data->res.dir_cinfo);
3140 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3145 static void nfs4_free_createdata(struct nfs4_createdata *data)
3150 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3151 struct page *page, unsigned int len, struct iattr *sattr)
3153 struct nfs4_createdata *data;
3154 int status = -ENAMETOOLONG;
3156 if (len > NFS4_MAXPATHLEN)
3160 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3164 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3165 data->arg.u.symlink.pages = &page;
3166 data->arg.u.symlink.len = len;
3168 status = nfs4_do_create(dir, dentry, data);
3170 nfs4_free_createdata(data);
3175 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3176 struct page *page, unsigned int len, struct iattr *sattr)
3178 struct nfs4_exception exception = { };
3181 err = nfs4_handle_exception(NFS_SERVER(dir),
3182 _nfs4_proc_symlink(dir, dentry, page,
3185 } while (exception.retry);
3189 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3190 struct iattr *sattr)
3192 struct nfs4_createdata *data;
3193 int status = -ENOMEM;
3195 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3199 status = nfs4_do_create(dir, dentry, data);
3201 nfs4_free_createdata(data);
3206 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3207 struct iattr *sattr)
3209 struct nfs4_exception exception = { };
3212 sattr->ia_mode &= ~current_umask();
3214 err = nfs4_handle_exception(NFS_SERVER(dir),
3215 _nfs4_proc_mkdir(dir, dentry, sattr),
3217 } while (exception.retry);
3221 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3222 u64 cookie, struct page **pages, unsigned int count, int plus)
3224 struct inode *dir = dentry->d_inode;
3225 struct nfs4_readdir_arg args = {
3230 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3233 struct nfs4_readdir_res res;
3234 struct rpc_message msg = {
3235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3242 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3243 dentry->d_parent->d_name.name,
3244 dentry->d_name.name,
3245 (unsigned long long)cookie);
3246 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3247 res.pgbase = args.pgbase;
3248 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3250 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3251 status += args.pgbase;
3254 nfs_invalidate_atime(dir);
3256 dprintk("%s: returns %d\n", __func__, status);
3260 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3261 u64 cookie, struct page **pages, unsigned int count, int plus)
3263 struct nfs4_exception exception = { };
3266 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3267 _nfs4_proc_readdir(dentry, cred, cookie,
3268 pages, count, plus),
3270 } while (exception.retry);
3274 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3275 struct iattr *sattr, dev_t rdev)
3277 struct nfs4_createdata *data;
3278 int mode = sattr->ia_mode;
3279 int status = -ENOMEM;
3281 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3286 data->arg.ftype = NF4FIFO;
3287 else if (S_ISBLK(mode)) {
3288 data->arg.ftype = NF4BLK;
3289 data->arg.u.device.specdata1 = MAJOR(rdev);
3290 data->arg.u.device.specdata2 = MINOR(rdev);
3292 else if (S_ISCHR(mode)) {
3293 data->arg.ftype = NF4CHR;
3294 data->arg.u.device.specdata1 = MAJOR(rdev);
3295 data->arg.u.device.specdata2 = MINOR(rdev);
3296 } else if (!S_ISSOCK(mode)) {
3301 status = nfs4_do_create(dir, dentry, data);
3303 nfs4_free_createdata(data);
3308 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3309 struct iattr *sattr, dev_t rdev)
3311 struct nfs4_exception exception = { };
3314 sattr->ia_mode &= ~current_umask();
3316 err = nfs4_handle_exception(NFS_SERVER(dir),
3317 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3319 } while (exception.retry);
3323 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3324 struct nfs_fsstat *fsstat)
3326 struct nfs4_statfs_arg args = {
3328 .bitmask = server->attr_bitmask,
3330 struct nfs4_statfs_res res = {
3333 struct rpc_message msg = {
3334 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3339 nfs_fattr_init(fsstat->fattr);
3340 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3343 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3345 struct nfs4_exception exception = { };
3348 err = nfs4_handle_exception(server,
3349 _nfs4_proc_statfs(server, fhandle, fsstat),
3351 } while (exception.retry);
3355 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3356 struct nfs_fsinfo *fsinfo)
3358 struct nfs4_fsinfo_arg args = {
3360 .bitmask = server->attr_bitmask,
3362 struct nfs4_fsinfo_res res = {
3365 struct rpc_message msg = {
3366 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3371 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3374 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3376 struct nfs4_exception exception = { };
3380 err = nfs4_handle_exception(server,
3381 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3383 } while (exception.retry);
3387 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3391 nfs_fattr_init(fsinfo->fattr);
3392 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3394 /* block layout checks this! */
3395 server->pnfs_blksize = fsinfo->blksize;
3396 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3402 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3403 struct nfs_pathconf *pathconf)
3405 struct nfs4_pathconf_arg args = {
3407 .bitmask = server->attr_bitmask,
3409 struct nfs4_pathconf_res res = {
3410 .pathconf = pathconf,
3412 struct rpc_message msg = {
3413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3418 /* None of the pathconf attributes are mandatory to implement */
3419 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3420 memset(pathconf, 0, sizeof(*pathconf));
3424 nfs_fattr_init(pathconf->fattr);
3425 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3428 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3429 struct nfs_pathconf *pathconf)
3431 struct nfs4_exception exception = { };
3435 err = nfs4_handle_exception(server,
3436 _nfs4_proc_pathconf(server, fhandle, pathconf),
3438 } while (exception.retry);
3442 void __nfs4_read_done_cb(struct nfs_read_data *data)
3444 nfs_invalidate_atime(data->header->inode);
3447 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3449 struct nfs_server *server = NFS_SERVER(data->header->inode);
3451 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3452 rpc_restart_call_prepare(task);
3456 __nfs4_read_done_cb(data);
3457 if (task->tk_status > 0)
3458 renew_lease(server, data->timestamp);
3462 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3465 dprintk("--> %s\n", __func__);
3467 if (!nfs4_sequence_done(task, &data->res.seq_res))
3470 return data->read_done_cb ? data->read_done_cb(task, data) :
3471 nfs4_read_done_cb(task, data);
3474 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3476 data->timestamp = jiffies;
3477 data->read_done_cb = nfs4_read_done_cb;
3478 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3479 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3482 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3484 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3485 &data->args.seq_args,
3490 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3492 struct inode *inode = data->header->inode;
3494 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3495 rpc_restart_call_prepare(task);
3498 if (task->tk_status >= 0) {
3499 renew_lease(NFS_SERVER(inode), data->timestamp);
3500 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3505 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3507 if (!nfs4_sequence_done(task, &data->res.seq_res))
3509 return data->write_done_cb ? data->write_done_cb(task, data) :
3510 nfs4_write_done_cb(task, data);
3514 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3516 const struct nfs_pgio_header *hdr = data->header;
3518 /* Don't request attributes for pNFS or O_DIRECT writes */
3519 if (data->ds_clp != NULL || hdr->dreq != NULL)
3521 /* Otherwise, request attributes if and only if we don't hold
3524 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3527 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3529 struct nfs_server *server = NFS_SERVER(data->header->inode);
3531 if (!nfs4_write_need_cache_consistency_data(data)) {
3532 data->args.bitmask = NULL;
3533 data->res.fattr = NULL;
3535 data->args.bitmask = server->cache_consistency_bitmask;
3537 if (!data->write_done_cb)
3538 data->write_done_cb = nfs4_write_done_cb;
3539 data->res.server = server;
3540 data->timestamp = jiffies;
3542 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3543 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3546 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3548 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3549 &data->args.seq_args,
3554 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3556 nfs4_setup_sequence(NFS_SERVER(data->inode),
3557 &data->args.seq_args,
3562 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3564 struct inode *inode = data->inode;
3566 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3567 rpc_restart_call_prepare(task);
3573 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3575 if (!nfs4_sequence_done(task, &data->res.seq_res))
3577 return data->commit_done_cb(task, data);
3580 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3582 struct nfs_server *server = NFS_SERVER(data->inode);
3584 if (data->commit_done_cb == NULL)
3585 data->commit_done_cb = nfs4_commit_done_cb;
3586 data->res.server = server;
3587 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3588 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3591 struct nfs4_renewdata {
3592 struct nfs_client *client;
3593 unsigned long timestamp;
3597 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3598 * standalone procedure for queueing an asynchronous RENEW.
3600 static void nfs4_renew_release(void *calldata)
3602 struct nfs4_renewdata *data = calldata;
3603 struct nfs_client *clp = data->client;
3605 if (atomic_read(&clp->cl_count) > 1)
3606 nfs4_schedule_state_renewal(clp);
3607 nfs_put_client(clp);
3611 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3613 struct nfs4_renewdata *data = calldata;
3614 struct nfs_client *clp = data->client;
3615 unsigned long timestamp = data->timestamp;
3617 if (task->tk_status < 0) {
3618 /* Unless we're shutting down, schedule state recovery! */
3619 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3621 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3622 nfs4_schedule_lease_recovery(clp);
3625 nfs4_schedule_path_down_recovery(clp);
3627 do_renew_lease(clp, timestamp);
3630 static const struct rpc_call_ops nfs4_renew_ops = {
3631 .rpc_call_done = nfs4_renew_done,
3632 .rpc_release = nfs4_renew_release,
3635 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3637 struct rpc_message msg = {
3638 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3642 struct nfs4_renewdata *data;
3644 if (renew_flags == 0)
3646 if (!atomic_inc_not_zero(&clp->cl_count))
3648 data = kmalloc(sizeof(*data), GFP_NOFS);
3652 data->timestamp = jiffies;
3653 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3654 &nfs4_renew_ops, data);
3657 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3659 struct rpc_message msg = {
3660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3664 unsigned long now = jiffies;
3667 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3670 do_renew_lease(clp, now);
3674 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3676 return (server->caps & NFS_CAP_ACLS)
3677 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3678 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3681 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3682 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3685 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3687 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3688 struct page **pages, unsigned int *pgbase)
3690 struct page *newpage, **spages;
3696 len = min_t(size_t, PAGE_SIZE, buflen);
3697 newpage = alloc_page(GFP_KERNEL);
3699 if (newpage == NULL)
3701 memcpy(page_address(newpage), buf, len);
3706 } while (buflen != 0);
3712 __free_page(spages[rc-1]);
3716 struct nfs4_cached_acl {
3722 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3724 struct nfs_inode *nfsi = NFS_I(inode);
3726 spin_lock(&inode->i_lock);
3727 kfree(nfsi->nfs4_acl);
3728 nfsi->nfs4_acl = acl;
3729 spin_unlock(&inode->i_lock);
3732 static void nfs4_zap_acl_attr(struct inode *inode)
3734 nfs4_set_cached_acl(inode, NULL);
3737 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3739 struct nfs_inode *nfsi = NFS_I(inode);
3740 struct nfs4_cached_acl *acl;
3743 spin_lock(&inode->i_lock);
3744 acl = nfsi->nfs4_acl;
3747 if (buf == NULL) /* user is just asking for length */
3749 if (acl->cached == 0)
3751 ret = -ERANGE; /* see getxattr(2) man page */
3752 if (acl->len > buflen)
3754 memcpy(buf, acl->data, acl->len);
3758 spin_unlock(&inode->i_lock);
3762 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3764 struct nfs4_cached_acl *acl;
3765 size_t buflen = sizeof(*acl) + acl_len;
3767 if (buflen <= PAGE_SIZE) {
3768 acl = kmalloc(buflen, GFP_KERNEL);
3772 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3774 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3781 nfs4_set_cached_acl(inode, acl);
3785 * The getxattr API returns the required buffer length when called with a
3786 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3787 * the required buf. On a NULL buf, we send a page of data to the server
3788 * guessing that the ACL request can be serviced by a page. If so, we cache
3789 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3790 * the cache. If not so, we throw away the page, and cache the required
3791 * length. The next getxattr call will then produce another round trip to
3792 * the server, this time with the input buf of the required size.
3794 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3796 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3797 struct nfs_getaclargs args = {
3798 .fh = NFS_FH(inode),
3802 struct nfs_getaclres res = {
3805 struct rpc_message msg = {
3806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3810 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3811 int ret = -ENOMEM, i;
3813 /* As long as we're doing a round trip to the server anyway,
3814 * let's be prepared for a page of acl data. */
3817 if (npages > ARRAY_SIZE(pages))
3820 for (i = 0; i < npages; i++) {
3821 pages[i] = alloc_page(GFP_KERNEL);
3826 /* for decoding across pages */
3827 res.acl_scratch = alloc_page(GFP_KERNEL);
3828 if (!res.acl_scratch)
3831 args.acl_len = npages * PAGE_SIZE;
3832 args.acl_pgbase = 0;
3834 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3835 __func__, buf, buflen, npages, args.acl_len);
3836 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3837 &msg, &args.seq_args, &res.seq_res, 0);
3841 /* Handle the case where the passed-in buffer is too short */
3842 if (res.acl_flags & NFS4_ACL_TRUNC) {
3843 /* Did the user only issue a request for the acl length? */
3849 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3851 if (res.acl_len > buflen) {
3855 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3860 for (i = 0; i < npages; i++)
3862 __free_page(pages[i]);
3863 if (res.acl_scratch)
3864 __free_page(res.acl_scratch);
3868 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3870 struct nfs4_exception exception = { };
3873 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3876 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3877 } while (exception.retry);
3881 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3883 struct nfs_server *server = NFS_SERVER(inode);
3886 if (!nfs4_server_supports_acls(server))
3888 ret = nfs_revalidate_inode(server, inode);
3891 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3892 nfs_zap_acl_cache(inode);
3893 ret = nfs4_read_cached_acl(inode, buf, buflen);
3895 /* -ENOENT is returned if there is no ACL or if there is an ACL
3896 * but no cached acl data, just the acl length */
3898 return nfs4_get_acl_uncached(inode, buf, buflen);
3901 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3903 struct nfs_server *server = NFS_SERVER(inode);
3904 struct page *pages[NFS4ACL_MAXPAGES];
3905 struct nfs_setaclargs arg = {
3906 .fh = NFS_FH(inode),
3910 struct nfs_setaclres res;
3911 struct rpc_message msg = {
3912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3916 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3919 if (!nfs4_server_supports_acls(server))
3921 if (npages > ARRAY_SIZE(pages))
3923 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3926 nfs4_inode_return_delegation(inode);
3927 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3930 * Free each page after tx, so the only ref left is
3931 * held by the network stack
3934 put_page(pages[i-1]);
3937 * Acl update can result in inode attribute update.
3938 * so mark the attribute cache invalid.
3940 spin_lock(&inode->i_lock);
3941 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3942 spin_unlock(&inode->i_lock);
3943 nfs_access_zap_cache(inode);
3944 nfs_zap_acl_cache(inode);
3948 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3950 struct nfs4_exception exception = { };
3953 err = nfs4_handle_exception(NFS_SERVER(inode),
3954 __nfs4_proc_set_acl(inode, buf, buflen),
3956 } while (exception.retry);
3961 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3963 struct nfs_client *clp = server->nfs_client;
3965 if (task->tk_status >= 0)
3967 switch(task->tk_status) {
3968 case -NFS4ERR_DELEG_REVOKED:
3969 case -NFS4ERR_ADMIN_REVOKED:
3970 case -NFS4ERR_BAD_STATEID:
3973 nfs_remove_bad_delegation(state->inode);
3974 case -NFS4ERR_OPENMODE:
3977 nfs4_schedule_stateid_recovery(server, state);
3978 goto wait_on_recovery;
3979 case -NFS4ERR_EXPIRED:
3981 nfs4_schedule_stateid_recovery(server, state);
3982 case -NFS4ERR_STALE_STATEID:
3983 case -NFS4ERR_STALE_CLIENTID:
3984 nfs4_schedule_lease_recovery(clp);
3985 goto wait_on_recovery;
3986 #if defined(CONFIG_NFS_V4_1)
3987 case -NFS4ERR_BADSESSION:
3988 case -NFS4ERR_BADSLOT:
3989 case -NFS4ERR_BAD_HIGH_SLOT:
3990 case -NFS4ERR_DEADSESSION:
3991 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3992 case -NFS4ERR_SEQ_FALSE_RETRY:
3993 case -NFS4ERR_SEQ_MISORDERED:
3994 dprintk("%s ERROR %d, Reset session\n", __func__,
3996 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
3997 task->tk_status = 0;
3999 #endif /* CONFIG_NFS_V4_1 */
4000 case -NFS4ERR_DELAY:
4001 nfs_inc_server_stats(server, NFSIOS_DELAY);
4002 case -NFS4ERR_GRACE:
4003 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4004 task->tk_status = 0;
4006 case -NFS4ERR_RETRY_UNCACHED_REP:
4007 case -NFS4ERR_OLD_STATEID:
4008 task->tk_status = 0;
4011 task->tk_status = nfs4_map_errors(task->tk_status);
4014 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4015 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4016 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4017 task->tk_status = 0;
4021 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4022 nfs4_verifier *bootverf)
4026 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4027 /* An impossible timestamp guarantees this value
4028 * will never match a generated boot time. */
4030 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4032 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4033 verf[0] = (__be32)nn->boot_time.tv_sec;
4034 verf[1] = (__be32)nn->boot_time.tv_nsec;
4036 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4040 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4041 char *buf, size_t len)
4043 unsigned int result;
4046 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4048 rpc_peeraddr2str(clp->cl_rpcclient,
4050 rpc_peeraddr2str(clp->cl_rpcclient,
4051 RPC_DISPLAY_PROTO));
4057 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4058 char *buf, size_t len)
4060 char *nodename = clp->cl_rpcclient->cl_nodename;
4062 if (nfs4_client_id_uniquifier[0] != '\0')
4063 nodename = nfs4_client_id_uniquifier;
4064 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4065 clp->rpc_ops->version, clp->cl_minorversion,
4070 * nfs4_proc_setclientid - Negotiate client ID
4071 * @clp: state data structure
4072 * @program: RPC program for NFSv4 callback service
4073 * @port: IP port number for NFS4 callback service
4074 * @cred: RPC credential to use for this call
4075 * @res: where to place the result
4077 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4079 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4080 unsigned short port, struct rpc_cred *cred,
4081 struct nfs4_setclientid_res *res)
4083 nfs4_verifier sc_verifier;
4084 struct nfs4_setclientid setclientid = {
4085 .sc_verifier = &sc_verifier,
4087 .sc_cb_ident = clp->cl_cb_ident,
4089 struct rpc_message msg = {
4090 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4091 .rpc_argp = &setclientid,
4097 /* nfs_client_id4 */
4098 nfs4_init_boot_verifier(clp, &sc_verifier);
4099 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4100 setclientid.sc_name_len =
4101 nfs4_init_uniform_client_string(clp,
4102 setclientid.sc_name,
4103 sizeof(setclientid.sc_name));
4105 setclientid.sc_name_len =
4106 nfs4_init_nonuniform_client_string(clp,
4107 setclientid.sc_name,
4108 sizeof(setclientid.sc_name));
4111 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4112 sizeof(setclientid.sc_netid),
4113 rpc_peeraddr2str(clp->cl_rpcclient,
4114 RPC_DISPLAY_NETID));
4116 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4117 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4118 clp->cl_ipaddr, port >> 8, port & 255);
4120 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4121 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4122 setclientid.sc_name_len, setclientid.sc_name);
4123 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4124 dprintk("NFS reply setclientid: %d\n", status);
4129 * nfs4_proc_setclientid_confirm - Confirm client ID
4130 * @clp: state data structure
4131 * @res: result of a previous SETCLIENTID
4132 * @cred: RPC credential to use for this call
4134 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4136 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4137 struct nfs4_setclientid_res *arg,
4138 struct rpc_cred *cred)
4140 struct nfs_fsinfo fsinfo;
4141 struct rpc_message msg = {
4142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4144 .rpc_resp = &fsinfo,
4150 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4151 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4154 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4156 spin_lock(&clp->cl_lock);
4157 clp->cl_lease_time = fsinfo.lease_time * HZ;
4158 clp->cl_last_renewal = now;
4159 spin_unlock(&clp->cl_lock);
4161 dprintk("NFS reply setclientid_confirm: %d\n", status);
4165 struct nfs4_delegreturndata {
4166 struct nfs4_delegreturnargs args;
4167 struct nfs4_delegreturnres res;
4169 nfs4_stateid stateid;
4170 unsigned long timestamp;
4171 struct nfs_fattr fattr;
4175 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4177 struct nfs4_delegreturndata *data = calldata;
4179 if (!nfs4_sequence_done(task, &data->res.seq_res))
4182 switch (task->tk_status) {
4183 case -NFS4ERR_STALE_STATEID:
4184 case -NFS4ERR_EXPIRED:
4186 renew_lease(data->res.server, data->timestamp);
4189 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4191 rpc_restart_call_prepare(task);
4195 data->rpc_status = task->tk_status;
4198 static void nfs4_delegreturn_release(void *calldata)
4203 #if defined(CONFIG_NFS_V4_1)
4204 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4206 struct nfs4_delegreturndata *d_data;
4208 d_data = (struct nfs4_delegreturndata *)data;
4210 nfs4_setup_sequence(d_data->res.server,
4211 &d_data->args.seq_args,
4212 &d_data->res.seq_res,
4215 #endif /* CONFIG_NFS_V4_1 */
4217 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4218 #if defined(CONFIG_NFS_V4_1)
4219 .rpc_call_prepare = nfs4_delegreturn_prepare,
4220 #endif /* CONFIG_NFS_V4_1 */
4221 .rpc_call_done = nfs4_delegreturn_done,
4222 .rpc_release = nfs4_delegreturn_release,
4225 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4227 struct nfs4_delegreturndata *data;
4228 struct nfs_server *server = NFS_SERVER(inode);
4229 struct rpc_task *task;
4230 struct rpc_message msg = {
4231 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4234 struct rpc_task_setup task_setup_data = {
4235 .rpc_client = server->client,
4236 .rpc_message = &msg,
4237 .callback_ops = &nfs4_delegreturn_ops,
4238 .flags = RPC_TASK_ASYNC,
4242 data = kzalloc(sizeof(*data), GFP_NOFS);
4245 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4246 data->args.fhandle = &data->fh;
4247 data->args.stateid = &data->stateid;
4248 data->args.bitmask = server->cache_consistency_bitmask;
4249 nfs_copy_fh(&data->fh, NFS_FH(inode));
4250 nfs4_stateid_copy(&data->stateid, stateid);
4251 data->res.fattr = &data->fattr;
4252 data->res.server = server;
4253 nfs_fattr_init(data->res.fattr);
4254 data->timestamp = jiffies;
4255 data->rpc_status = 0;
4257 task_setup_data.callback_data = data;
4258 msg.rpc_argp = &data->args;
4259 msg.rpc_resp = &data->res;
4260 task = rpc_run_task(&task_setup_data);
4262 return PTR_ERR(task);
4265 status = nfs4_wait_for_completion_rpc_task(task);
4268 status = data->rpc_status;
4270 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4272 nfs_refresh_inode(inode, &data->fattr);
4278 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4280 struct nfs_server *server = NFS_SERVER(inode);
4281 struct nfs4_exception exception = { };
4284 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4286 case -NFS4ERR_STALE_STATEID:
4287 case -NFS4ERR_EXPIRED:
4291 err = nfs4_handle_exception(server, err, &exception);
4292 } while (exception.retry);
4296 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4297 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4300 * sleep, with exponential backoff, and retry the LOCK operation.
4302 static unsigned long
4303 nfs4_set_lock_task_retry(unsigned long timeout)
4305 freezable_schedule_timeout_killable(timeout);
4307 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4308 return NFS4_LOCK_MAXTIMEOUT;
4312 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4314 struct inode *inode = state->inode;
4315 struct nfs_server *server = NFS_SERVER(inode);
4316 struct nfs_client *clp = server->nfs_client;
4317 struct nfs_lockt_args arg = {
4318 .fh = NFS_FH(inode),
4321 struct nfs_lockt_res res = {
4324 struct rpc_message msg = {
4325 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4328 .rpc_cred = state->owner->so_cred,
4330 struct nfs4_lock_state *lsp;
4333 arg.lock_owner.clientid = clp->cl_clientid;
4334 status = nfs4_set_lock_state(state, request);
4337 lsp = request->fl_u.nfs4_fl.owner;
4338 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4339 arg.lock_owner.s_dev = server->s_dev;
4340 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4343 request->fl_type = F_UNLCK;
4345 case -NFS4ERR_DENIED:
4348 request->fl_ops->fl_release_private(request);
4353 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4355 struct nfs4_exception exception = { };
4359 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4360 _nfs4_proc_getlk(state, cmd, request),
4362 } while (exception.retry);
4366 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4369 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4371 res = posix_lock_file_wait(file, fl);
4374 res = flock_lock_file_wait(file, fl);
4382 struct nfs4_unlockdata {
4383 struct nfs_locku_args arg;
4384 struct nfs_locku_res res;
4385 struct nfs4_lock_state *lsp;
4386 struct nfs_open_context *ctx;
4387 struct file_lock fl;
4388 const struct nfs_server *server;
4389 unsigned long timestamp;
4392 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4393 struct nfs_open_context *ctx,
4394 struct nfs4_lock_state *lsp,
4395 struct nfs_seqid *seqid)
4397 struct nfs4_unlockdata *p;
4398 struct inode *inode = lsp->ls_state->inode;
4400 p = kzalloc(sizeof(*p), GFP_NOFS);
4403 p->arg.fh = NFS_FH(inode);
4405 p->arg.seqid = seqid;
4406 p->res.seqid = seqid;
4407 p->arg.stateid = &lsp->ls_stateid;
4409 atomic_inc(&lsp->ls_count);
4410 /* Ensure we don't close file until we're done freeing locks! */
4411 p->ctx = get_nfs_open_context(ctx);
4412 memcpy(&p->fl, fl, sizeof(p->fl));
4413 p->server = NFS_SERVER(inode);
4417 static void nfs4_locku_release_calldata(void *data)
4419 struct nfs4_unlockdata *calldata = data;
4420 nfs_free_seqid(calldata->arg.seqid);
4421 nfs4_put_lock_state(calldata->lsp);
4422 put_nfs_open_context(calldata->ctx);
4426 static void nfs4_locku_done(struct rpc_task *task, void *data)
4428 struct nfs4_unlockdata *calldata = data;
4430 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4432 switch (task->tk_status) {
4434 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4435 &calldata->res.stateid);
4436 renew_lease(calldata->server, calldata->timestamp);
4438 case -NFS4ERR_BAD_STATEID:
4439 case -NFS4ERR_OLD_STATEID:
4440 case -NFS4ERR_STALE_STATEID:
4441 case -NFS4ERR_EXPIRED:
4444 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4445 rpc_restart_call_prepare(task);
4447 nfs_release_seqid(calldata->arg.seqid);
4450 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4452 struct nfs4_unlockdata *calldata = data;
4454 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4456 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
4457 /* Note: exit _without_ running nfs4_locku_done */
4458 task->tk_action = NULL;
4459 nfs4_sequence_done(task, &calldata->res.seq_res);
4462 calldata->timestamp = jiffies;
4463 if (nfs4_setup_sequence(calldata->server,
4464 &calldata->arg.seq_args,
4465 &calldata->res.seq_res,
4467 nfs_release_seqid(calldata->arg.seqid);
4470 static const struct rpc_call_ops nfs4_locku_ops = {
4471 .rpc_call_prepare = nfs4_locku_prepare,
4472 .rpc_call_done = nfs4_locku_done,
4473 .rpc_release = nfs4_locku_release_calldata,
4476 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4477 struct nfs_open_context *ctx,
4478 struct nfs4_lock_state *lsp,
4479 struct nfs_seqid *seqid)
4481 struct nfs4_unlockdata *data;
4482 struct rpc_message msg = {
4483 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4484 .rpc_cred = ctx->cred,
4486 struct rpc_task_setup task_setup_data = {
4487 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4488 .rpc_message = &msg,
4489 .callback_ops = &nfs4_locku_ops,
4490 .workqueue = nfsiod_workqueue,
4491 .flags = RPC_TASK_ASYNC,
4494 /* Ensure this is an unlock - when canceling a lock, the
4495 * canceled lock is passed in, and it won't be an unlock.
4497 fl->fl_type = F_UNLCK;
4499 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4501 nfs_free_seqid(seqid);
4502 return ERR_PTR(-ENOMEM);
4505 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4506 msg.rpc_argp = &data->arg;
4507 msg.rpc_resp = &data->res;
4508 task_setup_data.callback_data = data;
4509 return rpc_run_task(&task_setup_data);
4512 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4514 struct inode *inode = state->inode;
4515 struct nfs4_state_owner *sp = state->owner;
4516 struct nfs_inode *nfsi = NFS_I(inode);
4517 struct nfs_seqid *seqid;
4518 struct nfs4_lock_state *lsp;
4519 struct rpc_task *task;
4521 unsigned char fl_flags = request->fl_flags;
4523 status = nfs4_set_lock_state(state, request);
4524 /* Unlock _before_ we do the RPC call */
4525 request->fl_flags |= FL_EXISTS;
4526 /* Exclude nfs_delegation_claim_locks() */
4527 mutex_lock(&sp->so_delegreturn_mutex);
4528 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
4529 down_read(&nfsi->rwsem);
4530 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4531 up_read(&nfsi->rwsem);
4532 mutex_unlock(&sp->so_delegreturn_mutex);
4535 up_read(&nfsi->rwsem);
4536 mutex_unlock(&sp->so_delegreturn_mutex);
4539 /* Is this a delegated lock? */
4540 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4542 lsp = request->fl_u.nfs4_fl.owner;
4543 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4547 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4548 status = PTR_ERR(task);
4551 status = nfs4_wait_for_completion_rpc_task(task);
4554 request->fl_flags = fl_flags;
4558 struct nfs4_lockdata {
4559 struct nfs_lock_args arg;
4560 struct nfs_lock_res res;
4561 struct nfs4_lock_state *lsp;
4562 struct nfs_open_context *ctx;
4563 struct file_lock fl;
4564 unsigned long timestamp;
4567 struct nfs_server *server;
4570 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4571 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4574 struct nfs4_lockdata *p;
4575 struct inode *inode = lsp->ls_state->inode;
4576 struct nfs_server *server = NFS_SERVER(inode);
4578 p = kzalloc(sizeof(*p), gfp_mask);
4582 p->arg.fh = NFS_FH(inode);
4584 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4585 if (p->arg.open_seqid == NULL)
4587 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4588 if (p->arg.lock_seqid == NULL)
4589 goto out_free_seqid;
4590 p->arg.lock_stateid = &lsp->ls_stateid;
4591 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4592 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4593 p->arg.lock_owner.s_dev = server->s_dev;
4594 p->res.lock_seqid = p->arg.lock_seqid;
4597 atomic_inc(&lsp->ls_count);
4598 p->ctx = get_nfs_open_context(ctx);
4599 memcpy(&p->fl, fl, sizeof(p->fl));
4602 nfs_free_seqid(p->arg.open_seqid);
4608 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4610 struct nfs4_lockdata *data = calldata;
4611 struct nfs4_state *state = data->lsp->ls_state;
4613 dprintk("%s: begin!\n", __func__);
4614 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4616 /* Do we need to do an open_to_lock_owner? */
4617 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4618 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
4619 goto out_release_lock_seqid;
4621 data->arg.open_stateid = &state->stateid;
4622 data->arg.new_lock_owner = 1;
4623 data->res.open_seqid = data->arg.open_seqid;
4625 data->arg.new_lock_owner = 0;
4626 data->timestamp = jiffies;
4627 if (nfs4_setup_sequence(data->server,
4628 &data->arg.seq_args,
4632 nfs_release_seqid(data->arg.open_seqid);
4633 out_release_lock_seqid:
4634 nfs_release_seqid(data->arg.lock_seqid);
4635 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4638 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4640 struct nfs4_lockdata *data = calldata;
4642 dprintk("%s: begin!\n", __func__);
4644 if (!nfs4_sequence_done(task, &data->res.seq_res))
4647 data->rpc_status = task->tk_status;
4648 if (data->arg.new_lock_owner != 0) {
4649 if (data->rpc_status == 0)
4650 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4654 if (data->rpc_status == 0) {
4655 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4656 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
4657 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4660 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4663 static void nfs4_lock_release(void *calldata)
4665 struct nfs4_lockdata *data = calldata;
4667 dprintk("%s: begin!\n", __func__);
4668 nfs_free_seqid(data->arg.open_seqid);
4669 if (data->cancelled != 0) {
4670 struct rpc_task *task;
4671 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4672 data->arg.lock_seqid);
4674 rpc_put_task_async(task);
4675 dprintk("%s: cancelling lock!\n", __func__);
4677 nfs_free_seqid(data->arg.lock_seqid);
4678 nfs4_put_lock_state(data->lsp);
4679 put_nfs_open_context(data->ctx);
4681 dprintk("%s: done!\n", __func__);
4684 static const struct rpc_call_ops nfs4_lock_ops = {
4685 .rpc_call_prepare = nfs4_lock_prepare,
4686 .rpc_call_done = nfs4_lock_done,
4687 .rpc_release = nfs4_lock_release,
4690 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4693 case -NFS4ERR_ADMIN_REVOKED:
4694 case -NFS4ERR_BAD_STATEID:
4695 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4696 if (new_lock_owner != 0 ||
4697 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
4698 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4700 case -NFS4ERR_STALE_STATEID:
4701 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4702 case -NFS4ERR_EXPIRED:
4703 nfs4_schedule_lease_recovery(server->nfs_client);
4707 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4709 struct nfs4_lockdata *data;
4710 struct rpc_task *task;
4711 struct rpc_message msg = {
4712 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4713 .rpc_cred = state->owner->so_cred,
4715 struct rpc_task_setup task_setup_data = {
4716 .rpc_client = NFS_CLIENT(state->inode),
4717 .rpc_message = &msg,
4718 .callback_ops = &nfs4_lock_ops,
4719 .workqueue = nfsiod_workqueue,
4720 .flags = RPC_TASK_ASYNC,
4724 dprintk("%s: begin!\n", __func__);
4725 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4726 fl->fl_u.nfs4_fl.owner,
4727 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4731 data->arg.block = 1;
4732 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4733 msg.rpc_argp = &data->arg;
4734 msg.rpc_resp = &data->res;
4735 task_setup_data.callback_data = data;
4736 if (recovery_type > NFS_LOCK_NEW) {
4737 if (recovery_type == NFS_LOCK_RECLAIM)
4738 data->arg.reclaim = NFS_LOCK_RECLAIM;
4739 nfs4_set_sequence_privileged(&data->arg.seq_args);
4741 task = rpc_run_task(&task_setup_data);
4743 return PTR_ERR(task);
4744 ret = nfs4_wait_for_completion_rpc_task(task);
4746 ret = data->rpc_status;
4748 nfs4_handle_setlk_error(data->server, data->lsp,
4749 data->arg.new_lock_owner, ret);
4751 data->cancelled = 1;
4753 dprintk("%s: done, ret = %d!\n", __func__, ret);
4757 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4759 struct nfs_server *server = NFS_SERVER(state->inode);
4760 struct nfs4_exception exception = {
4761 .inode = state->inode,
4766 /* Cache the lock if possible... */
4767 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4769 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4770 if (err != -NFS4ERR_DELAY)
4772 nfs4_handle_exception(server, err, &exception);
4773 } while (exception.retry);
4777 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4779 struct nfs_server *server = NFS_SERVER(state->inode);
4780 struct nfs4_exception exception = {
4781 .inode = state->inode,
4785 err = nfs4_set_lock_state(state, request);
4789 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4791 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4795 case -NFS4ERR_GRACE:
4796 case -NFS4ERR_DELAY:
4797 nfs4_handle_exception(server, err, &exception);
4800 } while (exception.retry);
4805 #if defined(CONFIG_NFS_V4_1)
4807 * nfs41_check_expired_locks - possibly free a lock stateid
4809 * @state: NFSv4 state for an inode
4811 * Returns NFS_OK if recovery for this stateid is now finished.
4812 * Otherwise a negative NFS4ERR value is returned.
4814 static int nfs41_check_expired_locks(struct nfs4_state *state)
4816 int status, ret = -NFS4ERR_BAD_STATEID;
4817 struct nfs4_lock_state *lsp;
4818 struct nfs_server *server = NFS_SERVER(state->inode);
4820 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4821 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
4822 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4823 if (status != NFS_OK) {
4824 /* Free the stateid unless the server
4825 * informs us the stateid is unrecognized. */
4826 if (status != -NFS4ERR_BAD_STATEID)
4827 nfs41_free_stateid(server,
4829 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
4838 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4840 int status = NFS_OK;
4842 if (test_bit(LK_STATE_IN_USE, &state->flags))
4843 status = nfs41_check_expired_locks(state);
4844 if (status != NFS_OK)
4845 status = nfs4_lock_expired(state, request);
4850 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4852 struct nfs4_state_owner *sp = state->owner;
4853 struct nfs_inode *nfsi = NFS_I(state->inode);
4854 unsigned char fl_flags = request->fl_flags;
4856 int status = -ENOLCK;
4858 if ((fl_flags & FL_POSIX) &&
4859 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4861 /* Is this a delegated open? */
4862 status = nfs4_set_lock_state(state, request);
4865 request->fl_flags |= FL_ACCESS;
4866 status = do_vfs_lock(request->fl_file, request);
4869 down_read(&nfsi->rwsem);
4870 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4871 /* Yes: cache locks! */
4872 /* ...but avoid races with delegation recall... */
4873 request->fl_flags = fl_flags & ~FL_SLEEP;
4874 status = do_vfs_lock(request->fl_file, request);
4877 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
4878 up_read(&nfsi->rwsem);
4879 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4882 down_read(&nfsi->rwsem);
4883 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
4884 status = -NFS4ERR_DELAY;
4887 /* Note: we always want to sleep here! */
4888 request->fl_flags = fl_flags | FL_SLEEP;
4889 if (do_vfs_lock(request->fl_file, request) < 0)
4890 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4891 "manager!\n", __func__);
4893 up_read(&nfsi->rwsem);
4895 request->fl_flags = fl_flags;
4899 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4901 struct nfs4_exception exception = {
4903 .inode = state->inode,
4908 err = _nfs4_proc_setlk(state, cmd, request);
4909 if (err == -NFS4ERR_DENIED)
4911 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4913 } while (exception.retry);
4918 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4920 struct nfs_open_context *ctx;
4921 struct nfs4_state *state;
4922 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4925 /* verify open state */
4926 ctx = nfs_file_open_context(filp);
4929 if (request->fl_start < 0 || request->fl_end < 0)
4932 if (IS_GETLK(cmd)) {
4934 return nfs4_proc_getlk(state, F_GETLK, request);
4938 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4941 if (request->fl_type == F_UNLCK) {
4943 return nfs4_proc_unlck(state, cmd, request);
4950 * Don't rely on the VFS having checked the file open mode,
4951 * since it won't do this for flock() locks.
4953 switch (request->fl_type) {
4955 if (!(filp->f_mode & FMODE_READ))
4959 if (!(filp->f_mode & FMODE_WRITE))
4964 status = nfs4_proc_setlk(state, cmd, request);
4965 if ((status != -EAGAIN) || IS_SETLK(cmd))
4967 timeout = nfs4_set_lock_task_retry(timeout);
4968 status = -ERESTARTSYS;
4971 } while(status < 0);
4975 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4977 struct nfs_server *server = NFS_SERVER(state->inode);
4978 struct nfs4_exception exception = { };
4981 err = nfs4_set_lock_state(state, fl);
4985 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4988 printk(KERN_ERR "NFS: %s: unhandled error "
4989 "%d.\n", __func__, err);
4993 case -NFS4ERR_STALE_CLIENTID:
4994 case -NFS4ERR_STALE_STATEID:
4995 set_bit(NFS_DELEGATED_STATE, &state->flags);
4996 case -NFS4ERR_EXPIRED:
4997 nfs4_schedule_lease_recovery(server->nfs_client);
5000 case -NFS4ERR_BADSESSION:
5001 case -NFS4ERR_BADSLOT:
5002 case -NFS4ERR_BAD_HIGH_SLOT:
5003 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5004 case -NFS4ERR_DEADSESSION:
5005 set_bit(NFS_DELEGATED_STATE, &state->flags);
5006 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
5009 case -NFS4ERR_DELEG_REVOKED:
5010 case -NFS4ERR_ADMIN_REVOKED:
5011 case -NFS4ERR_BAD_STATEID:
5012 case -NFS4ERR_OPENMODE:
5013 nfs4_schedule_stateid_recovery(server, state);
5017 case -NFS4ERR_DENIED:
5018 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5022 set_bit(NFS_DELEGATED_STATE, &state->flags);
5023 err = nfs4_handle_exception(server, err, &exception);
5024 } while (exception.retry);
5029 struct nfs_release_lockowner_data {
5030 struct nfs4_lock_state *lsp;
5031 struct nfs_server *server;
5032 struct nfs_release_lockowner_args args;
5035 static void nfs4_release_lockowner_release(void *calldata)
5037 struct nfs_release_lockowner_data *data = calldata;
5038 nfs4_free_lock_state(data->server, data->lsp);
5042 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5043 .rpc_release = nfs4_release_lockowner_release,
5046 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
5048 struct nfs_server *server = lsp->ls_state->owner->so_server;
5049 struct nfs_release_lockowner_data *data;
5050 struct rpc_message msg = {
5051 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5054 if (server->nfs_client->cl_mvops->minor_version != 0)
5056 data = kmalloc(sizeof(*data), GFP_NOFS);
5060 data->server = server;
5061 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5062 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5063 data->args.lock_owner.s_dev = server->s_dev;
5064 msg.rpc_argp = &data->args;
5065 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5069 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5071 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5072 const void *buf, size_t buflen,
5073 int flags, int type)
5075 if (strcmp(key, "") != 0)
5078 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5081 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5082 void *buf, size_t buflen, int type)
5084 if (strcmp(key, "") != 0)
5087 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5090 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5091 size_t list_len, const char *name,
5092 size_t name_len, int type)
5094 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5096 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5099 if (list && len <= list_len)
5100 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5105 * nfs_fhget will use either the mounted_on_fileid or the fileid
5107 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5109 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5110 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5111 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5112 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5115 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5116 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5117 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5121 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5122 const struct qstr *name,
5123 struct nfs4_fs_locations *fs_locations,
5126 struct nfs_server *server = NFS_SERVER(dir);
5128 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5130 struct nfs4_fs_locations_arg args = {
5131 .dir_fh = NFS_FH(dir),
5136 struct nfs4_fs_locations_res res = {
5137 .fs_locations = fs_locations,
5139 struct rpc_message msg = {
5140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5146 dprintk("%s: start\n", __func__);
5148 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5149 * is not supported */
5150 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5151 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5153 bitmask[0] |= FATTR4_WORD0_FILEID;
5155 nfs_fattr_init(&fs_locations->fattr);
5156 fs_locations->server = server;
5157 fs_locations->nlocations = 0;
5158 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5159 dprintk("%s: returned status = %d\n", __func__, status);
5163 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5164 const struct qstr *name,
5165 struct nfs4_fs_locations *fs_locations,
5168 struct nfs4_exception exception = { };
5171 err = nfs4_handle_exception(NFS_SERVER(dir),
5172 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5174 } while (exception.retry);
5178 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5181 struct nfs4_secinfo_arg args = {
5182 .dir_fh = NFS_FH(dir),
5185 struct nfs4_secinfo_res res = {
5188 struct rpc_message msg = {
5189 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5194 dprintk("NFS call secinfo %s\n", name->name);
5195 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5196 dprintk("NFS reply secinfo: %d\n", status);
5200 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5201 struct nfs4_secinfo_flavors *flavors)
5203 struct nfs4_exception exception = { };
5206 err = nfs4_handle_exception(NFS_SERVER(dir),
5207 _nfs4_proc_secinfo(dir, name, flavors),
5209 } while (exception.retry);
5213 #ifdef CONFIG_NFS_V4_1
5215 * Check the exchange flags returned by the server for invalid flags, having
5216 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5219 static int nfs4_check_cl_exchange_flags(u32 flags)
5221 if (flags & ~EXCHGID4_FLAG_MASK_R)
5223 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5224 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5226 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5230 return -NFS4ERR_INVAL;
5234 nfs41_same_server_scope(struct nfs41_server_scope *a,
5235 struct nfs41_server_scope *b)
5237 if (a->server_scope_sz == b->server_scope_sz &&
5238 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5245 * nfs4_proc_bind_conn_to_session()
5247 * The 4.1 client currently uses the same TCP connection for the
5248 * fore and backchannel.
5250 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5253 struct nfs41_bind_conn_to_session_res res;
5254 struct rpc_message msg = {
5256 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5262 dprintk("--> %s\n", __func__);
5264 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5265 if (unlikely(res.session == NULL)) {
5270 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5272 if (memcmp(res.session->sess_id.data,
5273 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5274 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5278 if (res.dir != NFS4_CDFS4_BOTH) {
5279 dprintk("NFS: %s: Unexpected direction from server\n",
5284 if (res.use_conn_in_rdma_mode) {
5285 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5294 dprintk("<-- %s status= %d\n", __func__, status);
5299 * nfs4_proc_exchange_id()
5301 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5303 * Since the clientid has expired, all compounds using sessions
5304 * associated with the stale clientid will be returning
5305 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5306 * be in some phase of session reset.
5308 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5310 nfs4_verifier verifier;
5311 struct nfs41_exchange_id_args args = {
5312 .verifier = &verifier,
5314 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5316 struct nfs41_exchange_id_res res = {
5320 struct rpc_message msg = {
5321 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5327 nfs4_init_boot_verifier(clp, &verifier);
5328 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5330 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5331 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5332 args.id_len, args.id);
5334 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5336 if (unlikely(res.server_owner == NULL)) {
5341 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5343 if (unlikely(res.server_scope == NULL)) {
5345 goto out_server_owner;
5348 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5349 if (unlikely(res.impl_id == NULL)) {
5351 goto out_server_scope;
5354 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5356 status = nfs4_check_cl_exchange_flags(res.flags);
5359 clp->cl_clientid = res.clientid;
5360 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5361 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5362 clp->cl_seqid = res.seqid;
5364 kfree(clp->cl_serverowner);
5365 clp->cl_serverowner = res.server_owner;
5366 res.server_owner = NULL;
5368 /* use the most recent implementation id */
5369 kfree(clp->cl_implid);
5370 clp->cl_implid = res.impl_id;
5372 if (clp->cl_serverscope != NULL &&
5373 !nfs41_same_server_scope(clp->cl_serverscope,
5374 res.server_scope)) {
5375 dprintk("%s: server_scope mismatch detected\n",
5377 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5378 kfree(clp->cl_serverscope);
5379 clp->cl_serverscope = NULL;
5382 if (clp->cl_serverscope == NULL) {
5383 clp->cl_serverscope = res.server_scope;
5390 kfree(res.server_owner);
5392 kfree(res.server_scope);
5394 if (clp->cl_implid != NULL)
5395 dprintk("NFS reply exchange_id: Server Implementation ID: "
5396 "domain: %s, name: %s, date: %llu,%u\n",
5397 clp->cl_implid->domain, clp->cl_implid->name,
5398 clp->cl_implid->date.seconds,
5399 clp->cl_implid->date.nseconds);
5400 dprintk("NFS reply exchange_id: %d\n", status);
5404 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5405 struct rpc_cred *cred)
5407 struct rpc_message msg = {
5408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5414 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5416 dprintk("NFS: Got error %d from the server %s on "
5417 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5421 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5422 struct rpc_cred *cred)
5427 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5428 ret = _nfs4_proc_destroy_clientid(clp, cred);
5430 case -NFS4ERR_DELAY:
5431 case -NFS4ERR_CLIENTID_BUSY:
5441 int nfs4_destroy_clientid(struct nfs_client *clp)
5443 struct rpc_cred *cred;
5446 if (clp->cl_mvops->minor_version < 1)
5448 if (clp->cl_exchange_flags == 0)
5450 if (clp->cl_preserve_clid)
5452 cred = nfs4_get_exchange_id_cred(clp);
5453 ret = nfs4_proc_destroy_clientid(clp, cred);
5458 case -NFS4ERR_STALE_CLIENTID:
5459 clp->cl_exchange_flags = 0;
5465 struct nfs4_get_lease_time_data {
5466 struct nfs4_get_lease_time_args *args;
5467 struct nfs4_get_lease_time_res *res;
5468 struct nfs_client *clp;
5471 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5474 struct nfs4_get_lease_time_data *data =
5475 (struct nfs4_get_lease_time_data *)calldata;
5477 dprintk("--> %s\n", __func__);
5478 /* just setup sequence, do not trigger session recovery
5479 since we're invoked within one */
5480 nfs41_setup_sequence(data->clp->cl_session,
5481 &data->args->la_seq_args,
5482 &data->res->lr_seq_res,
5484 dprintk("<-- %s\n", __func__);
5488 * Called from nfs4_state_manager thread for session setup, so don't recover
5489 * from sequence operation or clientid errors.
5491 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5493 struct nfs4_get_lease_time_data *data =
5494 (struct nfs4_get_lease_time_data *)calldata;
5496 dprintk("--> %s\n", __func__);
5497 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5499 switch (task->tk_status) {
5500 case -NFS4ERR_DELAY:
5501 case -NFS4ERR_GRACE:
5502 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5503 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5504 task->tk_status = 0;
5506 case -NFS4ERR_RETRY_UNCACHED_REP:
5507 rpc_restart_call_prepare(task);
5510 dprintk("<-- %s\n", __func__);
5513 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5514 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5515 .rpc_call_done = nfs4_get_lease_time_done,
5518 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5520 struct rpc_task *task;
5521 struct nfs4_get_lease_time_args args;
5522 struct nfs4_get_lease_time_res res = {
5523 .lr_fsinfo = fsinfo,
5525 struct nfs4_get_lease_time_data data = {
5530 struct rpc_message msg = {
5531 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5535 struct rpc_task_setup task_setup = {
5536 .rpc_client = clp->cl_rpcclient,
5537 .rpc_message = &msg,
5538 .callback_ops = &nfs4_get_lease_time_ops,
5539 .callback_data = &data,
5540 .flags = RPC_TASK_TIMEOUT,
5544 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5545 nfs4_set_sequence_privileged(&args.la_seq_args);
5546 dprintk("--> %s\n", __func__);
5547 task = rpc_run_task(&task_setup);
5550 status = PTR_ERR(task);
5552 status = task->tk_status;
5555 dprintk("<-- %s return %d\n", __func__, status);
5561 * Initialize the values to be used by the client in CREATE_SESSION
5562 * If nfs4_init_session set the fore channel request and response sizes,
5565 * Set the back channel max_resp_sz_cached to zero to force the client to
5566 * always set csa_cachethis to FALSE because the current implementation
5567 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5569 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5571 struct nfs4_session *session = args->client->cl_session;
5572 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5573 mxresp_sz = session->fc_target_max_resp_sz;
5576 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5578 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5579 /* Fore channel attributes */
5580 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5581 args->fc_attrs.max_resp_sz = mxresp_sz;
5582 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5583 args->fc_attrs.max_reqs = max_session_slots;
5585 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5586 "max_ops=%u max_reqs=%u\n",
5588 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5589 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5591 /* Back channel attributes */
5592 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5593 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5594 args->bc_attrs.max_resp_sz_cached = 0;
5595 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5596 args->bc_attrs.max_reqs = 1;
5598 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5599 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5601 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5602 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5603 args->bc_attrs.max_reqs);
5606 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5608 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5609 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5611 if (rcvd->max_resp_sz > sent->max_resp_sz)
5614 * Our requested max_ops is the minimum we need; we're not
5615 * prepared to break up compounds into smaller pieces than that.
5616 * So, no point even trying to continue if the server won't
5619 if (rcvd->max_ops < sent->max_ops)
5621 if (rcvd->max_reqs == 0)
5623 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5624 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5628 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5630 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5631 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5633 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5635 if (rcvd->max_resp_sz < sent->max_resp_sz)
5637 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5639 /* These would render the backchannel useless: */
5640 if (rcvd->max_ops != sent->max_ops)
5642 if (rcvd->max_reqs != sent->max_reqs)
5647 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5648 struct nfs4_session *session)
5652 ret = nfs4_verify_fore_channel_attrs(args, session);
5655 return nfs4_verify_back_channel_attrs(args, session);
5658 static int _nfs4_proc_create_session(struct nfs_client *clp,
5659 struct rpc_cred *cred)
5661 struct nfs4_session *session = clp->cl_session;
5662 struct nfs41_create_session_args args = {
5664 .cb_program = NFS4_CALLBACK,
5666 struct nfs41_create_session_res res = {
5669 struct rpc_message msg = {
5670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5677 nfs4_init_channel_attrs(&args);
5678 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5680 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5683 /* Verify the session's negotiated channel_attrs values */
5684 status = nfs4_verify_channel_attrs(&args, session);
5685 /* Increment the clientid slot sequence id */
5693 * Issues a CREATE_SESSION operation to the server.
5694 * It is the responsibility of the caller to verify the session is
5695 * expired before calling this routine.
5697 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5701 struct nfs4_session *session = clp->cl_session;
5703 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5705 status = _nfs4_proc_create_session(clp, cred);
5709 /* Init or reset the session slot tables */
5710 status = nfs4_setup_session_slot_tables(session);
5711 dprintk("slot table setup returned %d\n", status);
5715 ptr = (unsigned *)&session->sess_id.data[0];
5716 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5717 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5719 dprintk("<-- %s\n", __func__);
5724 * Issue the over-the-wire RPC DESTROY_SESSION.
5725 * The caller must serialize access to this routine.
5727 int nfs4_proc_destroy_session(struct nfs4_session *session,
5728 struct rpc_cred *cred)
5730 struct rpc_message msg = {
5731 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5732 .rpc_argp = session,
5737 dprintk("--> nfs4_proc_destroy_session\n");
5739 /* session is still being setup */
5740 if (session->clp->cl_cons_state != NFS_CS_READY)
5743 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5746 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
5747 "Session has been destroyed regardless...\n", status);
5749 dprintk("<-- nfs4_proc_destroy_session\n");
5754 * Renew the cl_session lease.
5756 struct nfs4_sequence_data {
5757 struct nfs_client *clp;
5758 struct nfs4_sequence_args args;
5759 struct nfs4_sequence_res res;
5762 static void nfs41_sequence_release(void *data)
5764 struct nfs4_sequence_data *calldata = data;
5765 struct nfs_client *clp = calldata->clp;
5767 if (atomic_read(&clp->cl_count) > 1)
5768 nfs4_schedule_state_renewal(clp);
5769 nfs_put_client(clp);
5773 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5775 switch(task->tk_status) {
5776 case -NFS4ERR_DELAY:
5777 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5780 nfs4_schedule_lease_recovery(clp);
5785 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5787 struct nfs4_sequence_data *calldata = data;
5788 struct nfs_client *clp = calldata->clp;
5790 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5793 if (task->tk_status < 0) {
5794 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5795 if (atomic_read(&clp->cl_count) == 1)
5798 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5799 rpc_restart_call_prepare(task);
5803 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5805 dprintk("<-- %s\n", __func__);
5808 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5810 struct nfs4_sequence_data *calldata = data;
5811 struct nfs_client *clp = calldata->clp;
5812 struct nfs4_sequence_args *args;
5813 struct nfs4_sequence_res *res;
5815 args = task->tk_msg.rpc_argp;
5816 res = task->tk_msg.rpc_resp;
5818 nfs41_setup_sequence(clp->cl_session, args, res, task);
5821 static const struct rpc_call_ops nfs41_sequence_ops = {
5822 .rpc_call_done = nfs41_sequence_call_done,
5823 .rpc_call_prepare = nfs41_sequence_prepare,
5824 .rpc_release = nfs41_sequence_release,
5827 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5828 struct rpc_cred *cred,
5831 struct nfs4_sequence_data *calldata;
5832 struct rpc_message msg = {
5833 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5836 struct rpc_task_setup task_setup_data = {
5837 .rpc_client = clp->cl_rpcclient,
5838 .rpc_message = &msg,
5839 .callback_ops = &nfs41_sequence_ops,
5840 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5843 if (!atomic_inc_not_zero(&clp->cl_count))
5844 return ERR_PTR(-EIO);
5845 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5846 if (calldata == NULL) {
5847 nfs_put_client(clp);
5848 return ERR_PTR(-ENOMEM);
5850 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5852 nfs4_set_sequence_privileged(&calldata->args);
5853 msg.rpc_argp = &calldata->args;
5854 msg.rpc_resp = &calldata->res;
5855 calldata->clp = clp;
5856 task_setup_data.callback_data = calldata;
5858 return rpc_run_task(&task_setup_data);
5861 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5863 struct rpc_task *task;
5866 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5868 task = _nfs41_proc_sequence(clp, cred, false);
5870 ret = PTR_ERR(task);
5872 rpc_put_task_async(task);
5873 dprintk("<-- %s status=%d\n", __func__, ret);
5877 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5879 struct rpc_task *task;
5882 task = _nfs41_proc_sequence(clp, cred, true);
5884 ret = PTR_ERR(task);
5887 ret = rpc_wait_for_completion_task(task);
5889 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5891 if (task->tk_status == 0)
5892 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5893 ret = task->tk_status;
5897 dprintk("<-- %s status=%d\n", __func__, ret);
5901 struct nfs4_reclaim_complete_data {
5902 struct nfs_client *clp;
5903 struct nfs41_reclaim_complete_args arg;
5904 struct nfs41_reclaim_complete_res res;
5907 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5909 struct nfs4_reclaim_complete_data *calldata = data;
5911 nfs41_setup_sequence(calldata->clp->cl_session,
5912 &calldata->arg.seq_args,
5913 &calldata->res.seq_res,
5917 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5919 switch(task->tk_status) {
5921 case -NFS4ERR_COMPLETE_ALREADY:
5922 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5924 case -NFS4ERR_DELAY:
5925 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5927 case -NFS4ERR_RETRY_UNCACHED_REP:
5930 nfs4_schedule_lease_recovery(clp);
5935 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5937 struct nfs4_reclaim_complete_data *calldata = data;
5938 struct nfs_client *clp = calldata->clp;
5939 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5941 dprintk("--> %s\n", __func__);
5942 if (!nfs41_sequence_done(task, res))
5945 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5946 rpc_restart_call_prepare(task);
5949 dprintk("<-- %s\n", __func__);
5952 static void nfs4_free_reclaim_complete_data(void *data)
5954 struct nfs4_reclaim_complete_data *calldata = data;
5959 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5960 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5961 .rpc_call_done = nfs4_reclaim_complete_done,
5962 .rpc_release = nfs4_free_reclaim_complete_data,
5966 * Issue a global reclaim complete.
5968 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5970 struct nfs4_reclaim_complete_data *calldata;
5971 struct rpc_task *task;
5972 struct rpc_message msg = {
5973 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5975 struct rpc_task_setup task_setup_data = {
5976 .rpc_client = clp->cl_rpcclient,
5977 .rpc_message = &msg,
5978 .callback_ops = &nfs4_reclaim_complete_call_ops,
5979 .flags = RPC_TASK_ASYNC,
5981 int status = -ENOMEM;
5983 dprintk("--> %s\n", __func__);
5984 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5985 if (calldata == NULL)
5987 calldata->clp = clp;
5988 calldata->arg.one_fs = 0;
5990 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
5991 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
5992 msg.rpc_argp = &calldata->arg;
5993 msg.rpc_resp = &calldata->res;
5994 task_setup_data.callback_data = calldata;
5995 task = rpc_run_task(&task_setup_data);
5997 status = PTR_ERR(task);
6000 status = nfs4_wait_for_completion_rpc_task(task);
6002 status = task->tk_status;
6006 dprintk("<-- %s status=%d\n", __func__, status);
6011 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6013 struct nfs4_layoutget *lgp = calldata;
6014 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6015 struct nfs4_session *session = nfs4_get_session(server);
6017 dprintk("--> %s\n", __func__);
6018 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6019 * right now covering the LAYOUTGET we are about to send.
6020 * However, that is not so catastrophic, and there seems
6021 * to be no way to prevent it completely.
6023 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
6024 &lgp->res.seq_res, task))
6026 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6027 NFS_I(lgp->args.inode)->layout,
6028 lgp->args.ctx->state)) {
6029 rpc_exit(task, NFS4_OK);
6033 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6035 struct nfs4_layoutget *lgp = calldata;
6036 struct inode *inode = lgp->args.inode;
6037 struct nfs_server *server = NFS_SERVER(inode);
6038 struct pnfs_layout_hdr *lo;
6039 struct nfs4_state *state = NULL;
6041 dprintk("--> %s\n", __func__);
6043 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
6046 switch (task->tk_status) {
6049 case -NFS4ERR_LAYOUTTRYLATER:
6050 case -NFS4ERR_RECALLCONFLICT:
6051 task->tk_status = -NFS4ERR_DELAY;
6053 case -NFS4ERR_EXPIRED:
6054 case -NFS4ERR_BAD_STATEID:
6055 spin_lock(&inode->i_lock);
6056 lo = NFS_I(inode)->layout;
6057 if (!lo || list_empty(&lo->plh_segs)) {
6058 spin_unlock(&inode->i_lock);
6059 /* If the open stateid was bad, then recover it. */
6060 state = lgp->args.ctx->state;
6064 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6065 spin_unlock(&inode->i_lock);
6066 /* Mark the bad layout state as invalid, then
6067 * retry using the open stateid. */
6068 pnfs_free_lseg_list(&head);
6071 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6072 rpc_restart_call_prepare(task);
6074 dprintk("<-- %s\n", __func__);
6077 static size_t max_response_pages(struct nfs_server *server)
6079 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6080 return nfs_page_array_len(0, max_resp_sz);
6083 static void nfs4_free_pages(struct page **pages, size_t size)
6090 for (i = 0; i < size; i++) {
6093 __free_page(pages[i]);
6098 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6100 struct page **pages;
6103 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6105 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6109 for (i = 0; i < size; i++) {
6110 pages[i] = alloc_page(gfp_flags);
6112 dprintk("%s: failed to allocate page\n", __func__);
6113 nfs4_free_pages(pages, size);
6121 static void nfs4_layoutget_release(void *calldata)
6123 struct nfs4_layoutget *lgp = calldata;
6124 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6125 size_t max_pages = max_response_pages(server);
6127 dprintk("--> %s\n", __func__);
6128 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6129 put_nfs_open_context(lgp->args.ctx);
6131 dprintk("<-- %s\n", __func__);
6134 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6135 .rpc_call_prepare = nfs4_layoutget_prepare,
6136 .rpc_call_done = nfs4_layoutget_done,
6137 .rpc_release = nfs4_layoutget_release,
6140 struct pnfs_layout_segment *
6141 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6143 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6144 size_t max_pages = max_response_pages(server);
6145 struct rpc_task *task;
6146 struct rpc_message msg = {
6147 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6148 .rpc_argp = &lgp->args,
6149 .rpc_resp = &lgp->res,
6151 struct rpc_task_setup task_setup_data = {
6152 .rpc_client = server->client,
6153 .rpc_message = &msg,
6154 .callback_ops = &nfs4_layoutget_call_ops,
6155 .callback_data = lgp,
6156 .flags = RPC_TASK_ASYNC,
6158 struct pnfs_layout_segment *lseg = NULL;
6161 dprintk("--> %s\n", __func__);
6163 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6164 if (!lgp->args.layout.pages) {
6165 nfs4_layoutget_release(lgp);
6166 return ERR_PTR(-ENOMEM);
6168 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6170 lgp->res.layoutp = &lgp->args.layout;
6171 lgp->res.seq_res.sr_slot = NULL;
6172 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6173 task = rpc_run_task(&task_setup_data);
6175 return ERR_CAST(task);
6176 status = nfs4_wait_for_completion_rpc_task(task);
6178 status = task->tk_status;
6180 lseg = pnfs_layout_process(lgp);
6182 dprintk("<-- %s status=%d\n", __func__, status);
6184 return ERR_PTR(status);
6189 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6191 struct nfs4_layoutreturn *lrp = calldata;
6193 dprintk("--> %s\n", __func__);
6194 nfs41_setup_sequence(lrp->clp->cl_session,
6195 &lrp->args.seq_args,
6200 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6202 struct nfs4_layoutreturn *lrp = calldata;
6203 struct nfs_server *server;
6205 dprintk("--> %s\n", __func__);
6207 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
6210 server = NFS_SERVER(lrp->args.inode);
6211 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6212 rpc_restart_call_prepare(task);
6215 dprintk("<-- %s\n", __func__);
6218 static void nfs4_layoutreturn_release(void *calldata)
6220 struct nfs4_layoutreturn *lrp = calldata;
6221 struct pnfs_layout_hdr *lo = lrp->args.layout;
6223 dprintk("--> %s\n", __func__);
6224 spin_lock(&lo->plh_inode->i_lock);
6225 if (lrp->res.lrs_present)
6226 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6227 lo->plh_block_lgets--;
6228 spin_unlock(&lo->plh_inode->i_lock);
6229 pnfs_put_layout_hdr(lrp->args.layout);
6231 dprintk("<-- %s\n", __func__);
6234 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6235 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6236 .rpc_call_done = nfs4_layoutreturn_done,
6237 .rpc_release = nfs4_layoutreturn_release,
6240 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6242 struct rpc_task *task;
6243 struct rpc_message msg = {
6244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6245 .rpc_argp = &lrp->args,
6246 .rpc_resp = &lrp->res,
6248 struct rpc_task_setup task_setup_data = {
6249 .rpc_client = lrp->clp->cl_rpcclient,
6250 .rpc_message = &msg,
6251 .callback_ops = &nfs4_layoutreturn_call_ops,
6252 .callback_data = lrp,
6256 dprintk("--> %s\n", __func__);
6257 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6258 task = rpc_run_task(&task_setup_data);
6260 return PTR_ERR(task);
6261 status = task->tk_status;
6262 dprintk("<-- %s status=%d\n", __func__, status);
6268 * Retrieve the list of Data Server devices from the MDS.
6270 static int _nfs4_getdevicelist(struct nfs_server *server,
6271 const struct nfs_fh *fh,
6272 struct pnfs_devicelist *devlist)
6274 struct nfs4_getdevicelist_args args = {
6276 .layoutclass = server->pnfs_curr_ld->id,
6278 struct nfs4_getdevicelist_res res = {
6281 struct rpc_message msg = {
6282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6288 dprintk("--> %s\n", __func__);
6289 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6291 dprintk("<-- %s status=%d\n", __func__, status);
6295 int nfs4_proc_getdevicelist(struct nfs_server *server,
6296 const struct nfs_fh *fh,
6297 struct pnfs_devicelist *devlist)
6299 struct nfs4_exception exception = { };
6303 err = nfs4_handle_exception(server,
6304 _nfs4_getdevicelist(server, fh, devlist),
6306 } while (exception.retry);
6308 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6309 err, devlist->num_devs);
6313 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6316 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6318 struct nfs4_getdeviceinfo_args args = {
6321 struct nfs4_getdeviceinfo_res res = {
6324 struct rpc_message msg = {
6325 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6331 dprintk("--> %s\n", __func__);
6332 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6333 dprintk("<-- %s status=%d\n", __func__, status);
6338 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6340 struct nfs4_exception exception = { };
6344 err = nfs4_handle_exception(server,
6345 _nfs4_proc_getdeviceinfo(server, pdev),
6347 } while (exception.retry);
6350 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6352 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6354 struct nfs4_layoutcommit_data *data = calldata;
6355 struct nfs_server *server = NFS_SERVER(data->args.inode);
6356 struct nfs4_session *session = nfs4_get_session(server);
6358 nfs41_setup_sequence(session,
6359 &data->args.seq_args,
6365 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6367 struct nfs4_layoutcommit_data *data = calldata;
6368 struct nfs_server *server = NFS_SERVER(data->args.inode);
6370 if (!nfs41_sequence_done(task, &data->res.seq_res))
6373 switch (task->tk_status) { /* Just ignore these failures */
6374 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6375 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6376 case -NFS4ERR_BADLAYOUT: /* no layout */
6377 case -NFS4ERR_GRACE: /* loca_recalim always false */
6378 task->tk_status = 0;
6381 nfs_post_op_update_inode_force_wcc(data->args.inode,
6385 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6386 rpc_restart_call_prepare(task);
6392 static void nfs4_layoutcommit_release(void *calldata)
6394 struct nfs4_layoutcommit_data *data = calldata;
6395 struct pnfs_layout_segment *lseg, *tmp;
6396 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6398 pnfs_cleanup_layoutcommit(data);
6399 /* Matched by references in pnfs_set_layoutcommit */
6400 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6401 list_del_init(&lseg->pls_lc_list);
6402 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6404 pnfs_put_lseg(lseg);
6407 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6408 smp_mb__after_clear_bit();
6409 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6411 put_rpccred(data->cred);
6415 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6416 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6417 .rpc_call_done = nfs4_layoutcommit_done,
6418 .rpc_release = nfs4_layoutcommit_release,
6422 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6424 struct rpc_message msg = {
6425 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6426 .rpc_argp = &data->args,
6427 .rpc_resp = &data->res,
6428 .rpc_cred = data->cred,
6430 struct rpc_task_setup task_setup_data = {
6431 .task = &data->task,
6432 .rpc_client = NFS_CLIENT(data->args.inode),
6433 .rpc_message = &msg,
6434 .callback_ops = &nfs4_layoutcommit_ops,
6435 .callback_data = data,
6436 .flags = RPC_TASK_ASYNC,
6438 struct rpc_task *task;
6441 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6442 "lbw: %llu inode %lu\n",
6443 data->task.tk_pid, sync,
6444 data->args.lastbytewritten,
6445 data->args.inode->i_ino);
6447 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6448 task = rpc_run_task(&task_setup_data);
6450 return PTR_ERR(task);
6453 status = nfs4_wait_for_completion_rpc_task(task);
6456 status = task->tk_status;
6458 dprintk("%s: status %d\n", __func__, status);
6464 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6465 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6467 struct nfs41_secinfo_no_name_args args = {
6468 .style = SECINFO_STYLE_CURRENT_FH,
6470 struct nfs4_secinfo_res res = {
6473 struct rpc_message msg = {
6474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6478 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6482 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6483 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6485 struct nfs4_exception exception = { };
6488 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6491 case -NFS4ERR_WRONGSEC:
6492 case -NFS4ERR_NOTSUPP:
6495 err = nfs4_handle_exception(server, err, &exception);
6497 } while (exception.retry);
6503 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6504 struct nfs_fsinfo *info)
6508 rpc_authflavor_t flavor;
6509 struct nfs4_secinfo_flavors *flavors;
6511 page = alloc_page(GFP_KERNEL);
6517 flavors = page_address(page);
6518 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6521 * Fall back on "guess and check" method if
6522 * the server doesn't support SECINFO_NO_NAME
6524 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6525 err = nfs4_find_root_sec(server, fhandle, info);
6531 flavor = nfs_find_best_sec(flavors);
6533 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6543 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6546 struct nfs41_test_stateid_args args = {
6549 struct nfs41_test_stateid_res res;
6550 struct rpc_message msg = {
6551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6556 dprintk("NFS call test_stateid %p\n", stateid);
6557 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6558 nfs4_set_sequence_privileged(&args.seq_args);
6559 status = nfs4_call_sync_sequence(server->client, server, &msg,
6560 &args.seq_args, &res.seq_res);
6561 if (status != NFS_OK) {
6562 dprintk("NFS reply test_stateid: failed, %d\n", status);
6565 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
6570 * nfs41_test_stateid - perform a TEST_STATEID operation
6572 * @server: server / transport on which to perform the operation
6573 * @stateid: state ID to test
6575 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6576 * Otherwise a negative NFS4ERR value is returned if the operation
6577 * failed or the state ID is not currently valid.
6579 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6581 struct nfs4_exception exception = { };
6584 err = _nfs41_test_stateid(server, stateid);
6585 if (err != -NFS4ERR_DELAY)
6587 nfs4_handle_exception(server, err, &exception);
6588 } while (exception.retry);
6592 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6594 struct nfs41_free_stateid_args args = {
6597 struct nfs41_free_stateid_res res;
6598 struct rpc_message msg = {
6599 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6605 dprintk("NFS call free_stateid %p\n", stateid);
6606 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6607 nfs4_set_sequence_privileged(&args.seq_args);
6608 status = nfs4_call_sync_sequence(server->client, server, &msg,
6609 &args.seq_args, &res.seq_res);
6610 dprintk("NFS reply free_stateid: %d\n", status);
6615 * nfs41_free_stateid - perform a FREE_STATEID operation
6617 * @server: server / transport on which to perform the operation
6618 * @stateid: state ID to release
6620 * Returns NFS_OK if the server freed "stateid". Otherwise a
6621 * negative NFS4ERR value is returned.
6623 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6625 struct nfs4_exception exception = { };
6628 err = _nfs4_free_stateid(server, stateid);
6629 if (err != -NFS4ERR_DELAY)
6631 nfs4_handle_exception(server, err, &exception);
6632 } while (exception.retry);
6636 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6637 const nfs4_stateid *s2)
6639 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6642 if (s1->seqid == s2->seqid)
6644 if (s1->seqid == 0 || s2->seqid == 0)
6650 #endif /* CONFIG_NFS_V4_1 */
6652 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6653 const nfs4_stateid *s2)
6655 return nfs4_stateid_match(s1, s2);
6659 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6660 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6661 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6662 .recover_open = nfs4_open_reclaim,
6663 .recover_lock = nfs4_lock_reclaim,
6664 .establish_clid = nfs4_init_clientid,
6665 .get_clid_cred = nfs4_get_setclientid_cred,
6666 .detect_trunking = nfs40_discover_server_trunking,
6669 #if defined(CONFIG_NFS_V4_1)
6670 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6671 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6672 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6673 .recover_open = nfs4_open_reclaim,
6674 .recover_lock = nfs4_lock_reclaim,
6675 .establish_clid = nfs41_init_clientid,
6676 .get_clid_cred = nfs4_get_exchange_id_cred,
6677 .reclaim_complete = nfs41_proc_reclaim_complete,
6678 .detect_trunking = nfs41_discover_server_trunking,
6680 #endif /* CONFIG_NFS_V4_1 */
6682 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6683 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6684 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6685 .recover_open = nfs4_open_expired,
6686 .recover_lock = nfs4_lock_expired,
6687 .establish_clid = nfs4_init_clientid,
6688 .get_clid_cred = nfs4_get_setclientid_cred,
6691 #if defined(CONFIG_NFS_V4_1)
6692 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6693 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6694 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6695 .recover_open = nfs41_open_expired,
6696 .recover_lock = nfs41_lock_expired,
6697 .establish_clid = nfs41_init_clientid,
6698 .get_clid_cred = nfs4_get_exchange_id_cred,
6700 #endif /* CONFIG_NFS_V4_1 */
6702 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6703 .sched_state_renewal = nfs4_proc_async_renew,
6704 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6705 .renew_lease = nfs4_proc_renew,
6708 #if defined(CONFIG_NFS_V4_1)
6709 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6710 .sched_state_renewal = nfs41_proc_async_sequence,
6711 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6712 .renew_lease = nfs4_proc_sequence,
6716 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6718 .call_sync = _nfs4_call_sync,
6719 .match_stateid = nfs4_match_stateid,
6720 .find_root_sec = nfs4_find_root_sec,
6721 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6722 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6723 .state_renewal_ops = &nfs40_state_renewal_ops,
6726 #if defined(CONFIG_NFS_V4_1)
6727 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6729 .call_sync = nfs4_call_sync_sequence,
6730 .match_stateid = nfs41_match_stateid,
6731 .find_root_sec = nfs41_find_root_sec,
6732 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6733 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6734 .state_renewal_ops = &nfs41_state_renewal_ops,
6738 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6739 [0] = &nfs_v4_0_minor_ops,
6740 #if defined(CONFIG_NFS_V4_1)
6741 [1] = &nfs_v4_1_minor_ops,
6745 const struct inode_operations nfs4_dir_inode_operations = {
6746 .create = nfs_create,
6747 .lookup = nfs_lookup,
6748 .atomic_open = nfs_atomic_open,
6750 .unlink = nfs_unlink,
6751 .symlink = nfs_symlink,
6755 .rename = nfs_rename,
6756 .permission = nfs_permission,
6757 .getattr = nfs_getattr,
6758 .setattr = nfs_setattr,
6759 .getxattr = generic_getxattr,
6760 .setxattr = generic_setxattr,
6761 .listxattr = generic_listxattr,
6762 .removexattr = generic_removexattr,
6765 static const struct inode_operations nfs4_file_inode_operations = {
6766 .permission = nfs_permission,
6767 .getattr = nfs_getattr,
6768 .setattr = nfs_setattr,
6769 .getxattr = generic_getxattr,
6770 .setxattr = generic_setxattr,
6771 .listxattr = generic_listxattr,
6772 .removexattr = generic_removexattr,
6775 const struct nfs_rpc_ops nfs_v4_clientops = {
6776 .version = 4, /* protocol version */
6777 .dentry_ops = &nfs4_dentry_operations,
6778 .dir_inode_ops = &nfs4_dir_inode_operations,
6779 .file_inode_ops = &nfs4_file_inode_operations,
6780 .file_ops = &nfs4_file_operations,
6781 .getroot = nfs4_proc_get_root,
6782 .submount = nfs4_submount,
6783 .try_mount = nfs4_try_mount,
6784 .getattr = nfs4_proc_getattr,
6785 .setattr = nfs4_proc_setattr,
6786 .lookup = nfs4_proc_lookup,
6787 .access = nfs4_proc_access,
6788 .readlink = nfs4_proc_readlink,
6789 .create = nfs4_proc_create,
6790 .remove = nfs4_proc_remove,
6791 .unlink_setup = nfs4_proc_unlink_setup,
6792 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
6793 .unlink_done = nfs4_proc_unlink_done,
6794 .rename = nfs4_proc_rename,
6795 .rename_setup = nfs4_proc_rename_setup,
6796 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
6797 .rename_done = nfs4_proc_rename_done,
6798 .link = nfs4_proc_link,
6799 .symlink = nfs4_proc_symlink,
6800 .mkdir = nfs4_proc_mkdir,
6801 .rmdir = nfs4_proc_remove,
6802 .readdir = nfs4_proc_readdir,
6803 .mknod = nfs4_proc_mknod,
6804 .statfs = nfs4_proc_statfs,
6805 .fsinfo = nfs4_proc_fsinfo,
6806 .pathconf = nfs4_proc_pathconf,
6807 .set_capabilities = nfs4_server_capabilities,
6808 .decode_dirent = nfs4_decode_dirent,
6809 .read_setup = nfs4_proc_read_setup,
6810 .read_pageio_init = pnfs_pageio_init_read,
6811 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
6812 .read_done = nfs4_read_done,
6813 .write_setup = nfs4_proc_write_setup,
6814 .write_pageio_init = pnfs_pageio_init_write,
6815 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6816 .write_done = nfs4_write_done,
6817 .commit_setup = nfs4_proc_commit_setup,
6818 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
6819 .commit_done = nfs4_commit_done,
6820 .lock = nfs4_proc_lock,
6821 .clear_acl_cache = nfs4_zap_acl_attr,
6822 .close_context = nfs4_close_context,
6823 .open_context = nfs4_atomic_open,
6824 .have_delegation = nfs4_have_delegation,
6825 .return_delegation = nfs4_inode_return_delegation,
6826 .alloc_client = nfs4_alloc_client,
6827 .init_client = nfs4_init_client,
6828 .free_client = nfs4_free_client,
6829 .create_server = nfs4_create_server,
6830 .clone_server = nfs_clone_server,
6833 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6834 .prefix = XATTR_NAME_NFSV4_ACL,
6835 .list = nfs4_xattr_list_nfs4_acl,
6836 .get = nfs4_xattr_get_nfs4_acl,
6837 .set = nfs4_xattr_set_nfs4_acl,
6840 const struct xattr_handler *nfs4_xattr_handlers[] = {
6841 &nfs4_xattr_nfs4_acl_handler,