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 nfs_mark_delegation_referenced(delegation);
903 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
912 case FMODE_READ|FMODE_WRITE:
915 nfs4_state_set_mode_locked(state, state->state | fmode);
918 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
920 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
921 nfs4_stateid_copy(&state->stateid, stateid);
922 nfs4_stateid_copy(&state->open_stateid, stateid);
925 set_bit(NFS_O_RDONLY_STATE, &state->flags);
928 set_bit(NFS_O_WRONLY_STATE, &state->flags);
930 case FMODE_READ|FMODE_WRITE:
931 set_bit(NFS_O_RDWR_STATE, &state->flags);
935 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
937 write_seqlock(&state->seqlock);
938 nfs_set_open_stateid_locked(state, stateid, fmode);
939 write_sequnlock(&state->seqlock);
942 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
945 * Protect the call to nfs4_state_set_mode_locked and
946 * serialise the stateid update
948 write_seqlock(&state->seqlock);
949 if (deleg_stateid != NULL) {
950 nfs4_stateid_copy(&state->stateid, deleg_stateid);
951 set_bit(NFS_DELEGATED_STATE, &state->flags);
953 if (open_stateid != NULL)
954 nfs_set_open_stateid_locked(state, open_stateid, fmode);
955 write_sequnlock(&state->seqlock);
956 spin_lock(&state->owner->so_lock);
957 update_open_stateflags(state, fmode);
958 spin_unlock(&state->owner->so_lock);
961 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
963 struct nfs_inode *nfsi = NFS_I(state->inode);
964 struct nfs_delegation *deleg_cur;
967 fmode &= (FMODE_READ|FMODE_WRITE);
970 deleg_cur = rcu_dereference(nfsi->delegation);
971 if (deleg_cur == NULL)
974 spin_lock(&deleg_cur->lock);
975 if (nfsi->delegation != deleg_cur ||
976 (deleg_cur->type & fmode) != fmode)
977 goto no_delegation_unlock;
979 if (delegation == NULL)
980 delegation = &deleg_cur->stateid;
981 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
982 goto no_delegation_unlock;
984 nfs_mark_delegation_referenced(deleg_cur);
985 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
987 no_delegation_unlock:
988 spin_unlock(&deleg_cur->lock);
992 if (!ret && open_stateid != NULL) {
993 __update_open_stateid(state, open_stateid, NULL, fmode);
1001 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1003 struct nfs_delegation *delegation;
1006 delegation = rcu_dereference(NFS_I(inode)->delegation);
1007 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1012 nfs4_inode_return_delegation(inode);
1015 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1017 struct nfs4_state *state = opendata->state;
1018 struct nfs_inode *nfsi = NFS_I(state->inode);
1019 struct nfs_delegation *delegation;
1020 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1021 fmode_t fmode = opendata->o_arg.fmode;
1022 nfs4_stateid stateid;
1026 if (can_open_cached(state, fmode, open_mode)) {
1027 spin_lock(&state->owner->so_lock);
1028 if (can_open_cached(state, fmode, open_mode)) {
1029 update_open_stateflags(state, fmode);
1030 spin_unlock(&state->owner->so_lock);
1031 goto out_return_state;
1033 spin_unlock(&state->owner->so_lock);
1036 delegation = rcu_dereference(nfsi->delegation);
1037 if (!can_open_delegated(delegation, fmode)) {
1041 /* Save the delegation */
1042 nfs4_stateid_copy(&stateid, &delegation->stateid);
1044 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1049 /* Try to update the stateid using the delegation */
1050 if (update_open_stateid(state, NULL, &stateid, fmode))
1051 goto out_return_state;
1054 return ERR_PTR(ret);
1056 atomic_inc(&state->count);
1061 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1063 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1064 struct nfs_delegation *delegation;
1065 int delegation_flags = 0;
1068 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1070 delegation_flags = delegation->flags;
1072 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1073 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1074 "returning a delegation for "
1075 "OPEN(CLAIM_DELEGATE_CUR)\n",
1077 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1078 nfs_inode_set_delegation(state->inode,
1079 data->owner->so_cred,
1082 nfs_inode_reclaim_delegation(state->inode,
1083 data->owner->so_cred,
1088 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1089 * and update the nfs4_state.
1091 static struct nfs4_state *
1092 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1094 struct inode *inode = data->state->inode;
1095 struct nfs4_state *state = data->state;
1098 if (!data->rpc_done) {
1099 ret = data->rpc_status;
1104 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1105 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1106 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1110 state = nfs4_get_open_state(inode, data->owner);
1114 ret = nfs_refresh_inode(inode, &data->f_attr);
1118 if (data->o_res.delegation_type != 0)
1119 nfs4_opendata_check_deleg(data, state);
1120 update_open_stateid(state, &data->o_res.stateid, NULL,
1125 return ERR_PTR(ret);
1129 static struct nfs4_state *
1130 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1132 struct inode *inode;
1133 struct nfs4_state *state = NULL;
1136 if (!data->rpc_done) {
1137 state = nfs4_try_open_cached(data);
1142 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1144 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1145 ret = PTR_ERR(inode);
1149 state = nfs4_get_open_state(inode, data->owner);
1152 if (data->o_res.delegation_type != 0)
1153 nfs4_opendata_check_deleg(data, state);
1154 update_open_stateid(state, &data->o_res.stateid, NULL,
1162 return ERR_PTR(ret);
1165 static struct nfs4_state *
1166 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1168 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1169 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1170 return _nfs4_opendata_to_nfs4_state(data);
1173 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1175 struct nfs_inode *nfsi = NFS_I(state->inode);
1176 struct nfs_open_context *ctx;
1178 spin_lock(&state->inode->i_lock);
1179 list_for_each_entry(ctx, &nfsi->open_files, list) {
1180 if (ctx->state != state)
1182 get_nfs_open_context(ctx);
1183 spin_unlock(&state->inode->i_lock);
1186 spin_unlock(&state->inode->i_lock);
1187 return ERR_PTR(-ENOENT);
1190 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1192 struct nfs4_opendata *opendata;
1194 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1195 if (opendata == NULL)
1196 return ERR_PTR(-ENOMEM);
1197 opendata->state = state;
1198 atomic_inc(&state->count);
1202 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1204 struct nfs4_state *newstate;
1207 opendata->o_arg.open_flags = 0;
1208 opendata->o_arg.fmode = fmode;
1209 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1210 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1211 nfs4_init_opendata_res(opendata);
1212 ret = _nfs4_recover_proc_open(opendata);
1215 newstate = nfs4_opendata_to_nfs4_state(opendata);
1216 if (IS_ERR(newstate))
1217 return PTR_ERR(newstate);
1218 nfs4_close_state(newstate, fmode);
1223 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1225 struct nfs4_state *newstate;
1228 /* memory barrier prior to reading state->n_* */
1229 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1231 if (state->n_rdwr != 0) {
1232 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1233 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1236 if (newstate != state)
1239 if (state->n_wronly != 0) {
1240 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1241 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1244 if (newstate != state)
1247 if (state->n_rdonly != 0) {
1248 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1249 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1252 if (newstate != state)
1256 * We may have performed cached opens for all three recoveries.
1257 * Check if we need to update the current stateid.
1259 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1260 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1261 write_seqlock(&state->seqlock);
1262 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1263 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1264 write_sequnlock(&state->seqlock);
1271 * reclaim state on the server after a reboot.
1273 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1275 struct nfs_delegation *delegation;
1276 struct nfs4_opendata *opendata;
1277 fmode_t delegation_type = 0;
1280 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1281 if (IS_ERR(opendata))
1282 return PTR_ERR(opendata);
1283 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1284 opendata->o_arg.fh = NFS_FH(state->inode);
1286 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1287 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1288 delegation_type = delegation->type;
1290 opendata->o_arg.u.delegation_type = delegation_type;
1291 status = nfs4_open_recover(opendata, state);
1292 nfs4_opendata_put(opendata);
1296 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1298 struct nfs_server *server = NFS_SERVER(state->inode);
1299 struct nfs4_exception exception = { };
1302 err = _nfs4_do_open_reclaim(ctx, state);
1303 if (err != -NFS4ERR_DELAY)
1305 nfs4_handle_exception(server, err, &exception);
1306 } while (exception.retry);
1310 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1312 struct nfs_open_context *ctx;
1315 ctx = nfs4_state_find_open_context(state);
1317 return PTR_ERR(ctx);
1318 ret = nfs4_do_open_reclaim(ctx, state);
1319 put_nfs_open_context(ctx);
1323 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1325 struct nfs4_opendata *opendata;
1328 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1329 if (IS_ERR(opendata))
1330 return PTR_ERR(opendata);
1331 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1332 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1333 ret = nfs4_open_recover(opendata, state);
1334 nfs4_opendata_put(opendata);
1338 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1340 struct nfs4_exception exception = { };
1341 struct nfs_server *server = NFS_SERVER(state->inode);
1344 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1350 case -NFS4ERR_BADSESSION:
1351 case -NFS4ERR_BADSLOT:
1352 case -NFS4ERR_BAD_HIGH_SLOT:
1353 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1354 case -NFS4ERR_DEADSESSION:
1355 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1357 case -NFS4ERR_STALE_CLIENTID:
1358 case -NFS4ERR_STALE_STATEID:
1359 case -NFS4ERR_EXPIRED:
1360 /* Don't recall a delegation if it was lost */
1361 nfs4_schedule_lease_recovery(server->nfs_client);
1365 * The show must go on: exit, but mark the
1366 * stateid as needing recovery.
1368 case -NFS4ERR_DELEG_REVOKED:
1369 case -NFS4ERR_ADMIN_REVOKED:
1370 case -NFS4ERR_BAD_STATEID:
1371 nfs_inode_find_state_and_recover(state->inode,
1373 nfs4_schedule_stateid_recovery(server, state);
1378 err = nfs4_handle_exception(server, err, &exception);
1379 } while (exception.retry);
1384 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1386 struct nfs4_opendata *data = calldata;
1388 data->rpc_status = task->tk_status;
1389 if (data->rpc_status == 0) {
1390 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1391 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1392 renew_lease(data->o_res.server, data->timestamp);
1397 static void nfs4_open_confirm_release(void *calldata)
1399 struct nfs4_opendata *data = calldata;
1400 struct nfs4_state *state = NULL;
1402 /* If this request hasn't been cancelled, do nothing */
1403 if (data->cancelled == 0)
1405 /* In case of error, no cleanup! */
1406 if (!data->rpc_done)
1408 state = nfs4_opendata_to_nfs4_state(data);
1410 nfs4_close_state(state, data->o_arg.fmode);
1412 nfs4_opendata_put(data);
1415 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1416 .rpc_call_done = nfs4_open_confirm_done,
1417 .rpc_release = nfs4_open_confirm_release,
1421 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1423 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1425 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1426 struct rpc_task *task;
1427 struct rpc_message msg = {
1428 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1429 .rpc_argp = &data->c_arg,
1430 .rpc_resp = &data->c_res,
1431 .rpc_cred = data->owner->so_cred,
1433 struct rpc_task_setup task_setup_data = {
1434 .rpc_client = server->client,
1435 .rpc_message = &msg,
1436 .callback_ops = &nfs4_open_confirm_ops,
1437 .callback_data = data,
1438 .workqueue = nfsiod_workqueue,
1439 .flags = RPC_TASK_ASYNC,
1443 kref_get(&data->kref);
1445 data->rpc_status = 0;
1446 data->timestamp = jiffies;
1447 task = rpc_run_task(&task_setup_data);
1449 return PTR_ERR(task);
1450 status = nfs4_wait_for_completion_rpc_task(task);
1452 data->cancelled = 1;
1455 status = data->rpc_status;
1460 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1462 struct nfs4_opendata *data = calldata;
1463 struct nfs4_state_owner *sp = data->owner;
1465 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1468 * Check if we still need to send an OPEN call, or if we can use
1469 * a delegation instead.
1471 if (data->state != NULL) {
1472 struct nfs_delegation *delegation;
1474 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1477 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1478 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1479 can_open_delegated(delegation, data->o_arg.fmode))
1480 goto unlock_no_action;
1483 /* Update client id. */
1484 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1485 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1486 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1487 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1488 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1490 data->timestamp = jiffies;
1491 if (nfs4_setup_sequence(data->o_arg.server,
1492 &data->o_arg.seq_args,
1493 &data->o_res.seq_res,
1495 nfs_release_seqid(data->o_arg.seqid);
1500 task->tk_action = NULL;
1501 nfs4_sequence_done(task, &data->o_res.seq_res);
1504 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1506 struct nfs4_opendata *data = calldata;
1508 data->rpc_status = task->tk_status;
1510 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1513 if (task->tk_status == 0) {
1514 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1515 switch (data->o_res.f_attr->mode & S_IFMT) {
1519 data->rpc_status = -ELOOP;
1522 data->rpc_status = -EISDIR;
1525 data->rpc_status = -ENOTDIR;
1528 renew_lease(data->o_res.server, data->timestamp);
1529 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1530 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1535 static void nfs4_open_release(void *calldata)
1537 struct nfs4_opendata *data = calldata;
1538 struct nfs4_state *state = NULL;
1540 /* If this request hasn't been cancelled, do nothing */
1541 if (data->cancelled == 0)
1543 /* In case of error, no cleanup! */
1544 if (data->rpc_status != 0 || !data->rpc_done)
1546 /* In case we need an open_confirm, no cleanup! */
1547 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1549 state = nfs4_opendata_to_nfs4_state(data);
1551 nfs4_close_state(state, data->o_arg.fmode);
1553 nfs4_opendata_put(data);
1556 static const struct rpc_call_ops nfs4_open_ops = {
1557 .rpc_call_prepare = nfs4_open_prepare,
1558 .rpc_call_done = nfs4_open_done,
1559 .rpc_release = nfs4_open_release,
1562 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1564 struct inode *dir = data->dir->d_inode;
1565 struct nfs_server *server = NFS_SERVER(dir);
1566 struct nfs_openargs *o_arg = &data->o_arg;
1567 struct nfs_openres *o_res = &data->o_res;
1568 struct rpc_task *task;
1569 struct rpc_message msg = {
1570 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1573 .rpc_cred = data->owner->so_cred,
1575 struct rpc_task_setup task_setup_data = {
1576 .rpc_client = server->client,
1577 .rpc_message = &msg,
1578 .callback_ops = &nfs4_open_ops,
1579 .callback_data = data,
1580 .workqueue = nfsiod_workqueue,
1581 .flags = RPC_TASK_ASYNC,
1585 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1586 kref_get(&data->kref);
1588 data->rpc_status = 0;
1589 data->cancelled = 0;
1591 nfs4_set_sequence_privileged(&o_arg->seq_args);
1592 task = rpc_run_task(&task_setup_data);
1594 return PTR_ERR(task);
1595 status = nfs4_wait_for_completion_rpc_task(task);
1597 data->cancelled = 1;
1600 status = data->rpc_status;
1606 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1608 struct inode *dir = data->dir->d_inode;
1609 struct nfs_openres *o_res = &data->o_res;
1612 status = nfs4_run_open_task(data, 1);
1613 if (status != 0 || !data->rpc_done)
1616 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1618 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1619 status = _nfs4_proc_open_confirm(data);
1627 static int nfs4_opendata_access(struct rpc_cred *cred,
1628 struct nfs4_opendata *opendata,
1629 struct nfs4_state *state, fmode_t fmode)
1631 struct nfs_access_entry cache;
1634 /* access call failed or for some reason the server doesn't
1635 * support any access modes -- defer access call until later */
1636 if (opendata->o_res.access_supported == 0)
1640 /* don't check MAY_WRITE - a newly created file may not have
1641 * write mode bits, but POSIX allows the creating process to write */
1642 if (fmode & FMODE_READ)
1644 if (fmode & FMODE_EXEC)
1648 cache.jiffies = jiffies;
1649 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1650 nfs_access_add_cache(state->inode, &cache);
1652 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1655 /* even though OPEN succeeded, access is denied. Close the file */
1656 nfs4_close_state(state, fmode);
1661 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1663 static int _nfs4_proc_open(struct nfs4_opendata *data)
1665 struct inode *dir = data->dir->d_inode;
1666 struct nfs_server *server = NFS_SERVER(dir);
1667 struct nfs_openargs *o_arg = &data->o_arg;
1668 struct nfs_openres *o_res = &data->o_res;
1671 status = nfs4_run_open_task(data, 0);
1672 if (!data->rpc_done)
1675 if (status == -NFS4ERR_BADNAME &&
1676 !(o_arg->open_flags & O_CREAT))
1681 nfs_fattr_map_and_free_names(server, &data->f_attr);
1683 if (o_arg->open_flags & O_CREAT)
1684 update_changeattr(dir, &o_res->cinfo);
1685 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1686 server->caps &= ~NFS_CAP_POSIX_LOCK;
1687 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1688 status = _nfs4_proc_open_confirm(data);
1692 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1693 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1697 static int nfs4_recover_expired_lease(struct nfs_server *server)
1699 return nfs4_client_recover_expired_lease(server->nfs_client);
1704 * reclaim state on the server after a network partition.
1705 * Assumes caller holds the appropriate lock
1707 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1709 struct nfs4_opendata *opendata;
1712 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1713 if (IS_ERR(opendata))
1714 return PTR_ERR(opendata);
1715 ret = nfs4_open_recover(opendata, state);
1717 d_drop(ctx->dentry);
1718 nfs4_opendata_put(opendata);
1722 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1724 struct nfs_server *server = NFS_SERVER(state->inode);
1725 struct nfs4_exception exception = { };
1729 err = _nfs4_open_expired(ctx, state);
1733 case -NFS4ERR_GRACE:
1734 case -NFS4ERR_DELAY:
1735 nfs4_handle_exception(server, err, &exception);
1738 } while (exception.retry);
1743 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1745 struct nfs_open_context *ctx;
1748 ctx = nfs4_state_find_open_context(state);
1750 return PTR_ERR(ctx);
1751 ret = nfs4_do_open_expired(ctx, state);
1752 put_nfs_open_context(ctx);
1756 #if defined(CONFIG_NFS_V4_1)
1757 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1759 struct nfs_server *server = NFS_SERVER(state->inode);
1760 nfs4_stateid *stateid = &state->stateid;
1763 /* If a state reset has been done, test_stateid is unneeded */
1764 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1767 status = nfs41_test_stateid(server, stateid);
1768 if (status != NFS_OK) {
1769 /* Free the stateid unless the server explicitly
1770 * informs us the stateid is unrecognized. */
1771 if (status != -NFS4ERR_BAD_STATEID)
1772 nfs41_free_stateid(server, stateid);
1773 nfs_remove_bad_delegation(state->inode);
1775 write_seqlock(&state->seqlock);
1776 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1777 write_sequnlock(&state->seqlock);
1778 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1783 * nfs41_check_open_stateid - possibly free an open stateid
1785 * @state: NFSv4 state for an inode
1787 * Returns NFS_OK if recovery for this stateid is now finished.
1788 * Otherwise a negative NFS4ERR value is returned.
1790 static int nfs41_check_open_stateid(struct nfs4_state *state)
1792 struct nfs_server *server = NFS_SERVER(state->inode);
1793 nfs4_stateid *stateid = &state->open_stateid;
1796 /* If a state reset has been done, test_stateid is unneeded */
1797 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1798 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1799 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1800 return -NFS4ERR_BAD_STATEID;
1802 status = nfs41_test_stateid(server, stateid);
1803 if (status != NFS_OK) {
1804 /* Free the stateid unless the server explicitly
1805 * informs us the stateid is unrecognized. */
1806 if (status != -NFS4ERR_BAD_STATEID)
1807 nfs41_free_stateid(server, stateid);
1809 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1810 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1811 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1816 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1820 nfs41_clear_delegation_stateid(state);
1821 status = nfs41_check_open_stateid(state);
1822 if (status != NFS_OK)
1823 status = nfs4_open_expired(sp, state);
1829 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1830 * fields corresponding to attributes that were used to store the verifier.
1831 * Make sure we clobber those fields in the later setattr call
1833 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1835 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1836 !(sattr->ia_valid & ATTR_ATIME_SET))
1837 sattr->ia_valid |= ATTR_ATIME;
1839 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1840 !(sattr->ia_valid & ATTR_MTIME_SET))
1841 sattr->ia_valid |= ATTR_MTIME;
1845 * Returns a referenced nfs4_state
1847 static int _nfs4_do_open(struct inode *dir,
1848 struct dentry *dentry,
1851 struct iattr *sattr,
1852 struct rpc_cred *cred,
1853 struct nfs4_state **res,
1854 struct nfs4_threshold **ctx_th)
1856 struct nfs4_state_owner *sp;
1857 struct nfs4_state *state = NULL;
1858 struct nfs_server *server = NFS_SERVER(dir);
1859 struct nfs4_opendata *opendata;
1862 /* Protect against reboot recovery conflicts */
1864 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1866 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1869 status = nfs4_recover_expired_lease(server);
1871 goto err_put_state_owner;
1872 if (dentry->d_inode != NULL)
1873 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1875 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1876 if (opendata == NULL)
1877 goto err_put_state_owner;
1879 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1880 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1881 if (!opendata->f_attr.mdsthreshold)
1882 goto err_opendata_put;
1883 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
1885 if (dentry->d_inode != NULL)
1886 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1888 status = _nfs4_proc_open(opendata);
1890 goto err_opendata_put;
1892 state = nfs4_opendata_to_nfs4_state(opendata);
1893 status = PTR_ERR(state);
1895 goto err_opendata_put;
1896 if (server->caps & NFS_CAP_POSIX_LOCK)
1897 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1899 status = nfs4_opendata_access(cred, opendata, state, fmode);
1901 goto err_opendata_put;
1903 if (opendata->o_arg.open_flags & O_EXCL) {
1904 nfs4_exclusive_attrset(opendata, sattr);
1906 nfs_fattr_init(opendata->o_res.f_attr);
1907 status = nfs4_do_setattr(state->inode, cred,
1908 opendata->o_res.f_attr, sattr,
1911 nfs_setattr_update_inode(state->inode, sattr);
1912 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1915 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1916 *ctx_th = opendata->f_attr.mdsthreshold;
1918 kfree(opendata->f_attr.mdsthreshold);
1919 opendata->f_attr.mdsthreshold = NULL;
1921 nfs4_opendata_put(opendata);
1922 nfs4_put_state_owner(sp);
1926 kfree(opendata->f_attr.mdsthreshold);
1927 nfs4_opendata_put(opendata);
1928 err_put_state_owner:
1929 nfs4_put_state_owner(sp);
1936 static struct nfs4_state *nfs4_do_open(struct inode *dir,
1937 struct dentry *dentry,
1940 struct iattr *sattr,
1941 struct rpc_cred *cred,
1942 struct nfs4_threshold **ctx_th)
1944 struct nfs4_exception exception = { };
1945 struct nfs4_state *res;
1948 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1950 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1954 /* NOTE: BAD_SEQID means the server and client disagree about the
1955 * book-keeping w.r.t. state-changing operations
1956 * (OPEN/CLOSE/LOCK/LOCKU...)
1957 * It is actually a sign of a bug on the client or on the server.
1959 * If we receive a BAD_SEQID error in the particular case of
1960 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1961 * have unhashed the old state_owner for us, and that we can
1962 * therefore safely retry using a new one. We should still warn
1963 * the user though...
1965 if (status == -NFS4ERR_BAD_SEQID) {
1966 pr_warn_ratelimited("NFS: v4 server %s "
1967 " returned a bad sequence-id error!\n",
1968 NFS_SERVER(dir)->nfs_client->cl_hostname);
1969 exception.retry = 1;
1973 * BAD_STATEID on OPEN means that the server cancelled our
1974 * state before it received the OPEN_CONFIRM.
1975 * Recover by retrying the request as per the discussion
1976 * on Page 181 of RFC3530.
1978 if (status == -NFS4ERR_BAD_STATEID) {
1979 exception.retry = 1;
1982 if (status == -EAGAIN) {
1983 /* We must have found a delegation */
1984 exception.retry = 1;
1987 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1988 status, &exception));
1989 } while (exception.retry);
1993 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1994 struct nfs_fattr *fattr, struct iattr *sattr,
1995 struct nfs4_state *state)
1997 struct nfs_server *server = NFS_SERVER(inode);
1998 struct nfs_setattrargs arg = {
1999 .fh = NFS_FH(inode),
2002 .bitmask = server->attr_bitmask,
2004 struct nfs_setattrres res = {
2008 struct rpc_message msg = {
2009 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2014 unsigned long timestamp = jiffies;
2017 nfs_fattr_init(fattr);
2019 if (state != NULL) {
2020 struct nfs_lockowner lockowner = {
2021 .l_owner = current->files,
2022 .l_pid = current->tgid,
2024 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2026 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2028 /* Use that stateid */
2030 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2032 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2033 if (status == 0 && state != NULL)
2034 renew_lease(server, timestamp);
2038 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2039 struct nfs_fattr *fattr, struct iattr *sattr,
2040 struct nfs4_state *state)
2042 struct nfs_server *server = NFS_SERVER(inode);
2043 struct nfs4_exception exception = {
2049 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2051 case -NFS4ERR_OPENMODE:
2052 if (state && !(state->state & FMODE_WRITE)) {
2054 if (sattr->ia_valid & ATTR_OPEN)
2059 err = nfs4_handle_exception(server, err, &exception);
2060 } while (exception.retry);
2065 struct nfs4_closedata {
2066 struct inode *inode;
2067 struct nfs4_state *state;
2068 struct nfs_closeargs arg;
2069 struct nfs_closeres res;
2070 struct nfs_fattr fattr;
2071 unsigned long timestamp;
2076 static void nfs4_free_closedata(void *data)
2078 struct nfs4_closedata *calldata = data;
2079 struct nfs4_state_owner *sp = calldata->state->owner;
2080 struct super_block *sb = calldata->state->inode->i_sb;
2083 pnfs_roc_release(calldata->state->inode);
2084 nfs4_put_open_state(calldata->state);
2085 nfs_free_seqid(calldata->arg.seqid);
2086 nfs4_put_state_owner(sp);
2087 nfs_sb_deactive_async(sb);
2091 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2094 spin_lock(&state->owner->so_lock);
2095 if (!(fmode & FMODE_READ))
2096 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2097 if (!(fmode & FMODE_WRITE))
2098 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2099 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2100 spin_unlock(&state->owner->so_lock);
2103 static void nfs4_close_done(struct rpc_task *task, void *data)
2105 struct nfs4_closedata *calldata = data;
2106 struct nfs4_state *state = calldata->state;
2107 struct nfs_server *server = NFS_SERVER(calldata->inode);
2109 dprintk("%s: begin!\n", __func__);
2110 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2112 /* hmm. we are done with the inode, and in the process of freeing
2113 * the state_owner. we keep this around to process errors
2115 switch (task->tk_status) {
2118 pnfs_roc_set_barrier(state->inode,
2119 calldata->roc_barrier);
2120 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2121 renew_lease(server, calldata->timestamp);
2122 nfs4_close_clear_stateid_flags(state,
2123 calldata->arg.fmode);
2125 case -NFS4ERR_STALE_STATEID:
2126 case -NFS4ERR_OLD_STATEID:
2127 case -NFS4ERR_BAD_STATEID:
2128 case -NFS4ERR_EXPIRED:
2129 if (calldata->arg.fmode == 0)
2132 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2133 rpc_restart_call_prepare(task);
2135 nfs_release_seqid(calldata->arg.seqid);
2136 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2137 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2140 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2142 struct nfs4_closedata *calldata = data;
2143 struct nfs4_state *state = calldata->state;
2144 struct inode *inode = calldata->inode;
2147 dprintk("%s: begin!\n", __func__);
2148 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2151 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2152 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2153 spin_lock(&state->owner->so_lock);
2154 /* Calculate the change in open mode */
2155 if (state->n_rdwr == 0) {
2156 if (state->n_rdonly == 0) {
2157 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2158 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2159 calldata->arg.fmode &= ~FMODE_READ;
2161 if (state->n_wronly == 0) {
2162 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2163 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2164 calldata->arg.fmode &= ~FMODE_WRITE;
2167 spin_unlock(&state->owner->so_lock);
2170 /* Note: exit _without_ calling nfs4_close_done */
2171 task->tk_action = NULL;
2172 nfs4_sequence_done(task, &calldata->res.seq_res);
2176 if (calldata->arg.fmode == 0) {
2177 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2178 if (calldata->roc &&
2179 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
2183 nfs_fattr_init(calldata->res.fattr);
2184 calldata->timestamp = jiffies;
2185 if (nfs4_setup_sequence(NFS_SERVER(inode),
2186 &calldata->arg.seq_args,
2187 &calldata->res.seq_res,
2189 nfs_release_seqid(calldata->arg.seqid);
2191 dprintk("%s: done!\n", __func__);
2194 static const struct rpc_call_ops nfs4_close_ops = {
2195 .rpc_call_prepare = nfs4_close_prepare,
2196 .rpc_call_done = nfs4_close_done,
2197 .rpc_release = nfs4_free_closedata,
2201 * It is possible for data to be read/written from a mem-mapped file
2202 * after the sys_close call (which hits the vfs layer as a flush).
2203 * This means that we can't safely call nfsv4 close on a file until
2204 * the inode is cleared. This in turn means that we are not good
2205 * NFSv4 citizens - we do not indicate to the server to update the file's
2206 * share state even when we are done with one of the three share
2207 * stateid's in the inode.
2209 * NOTE: Caller must be holding the sp->so_owner semaphore!
2211 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2213 struct nfs_server *server = NFS_SERVER(state->inode);
2214 struct nfs4_closedata *calldata;
2215 struct nfs4_state_owner *sp = state->owner;
2216 struct rpc_task *task;
2217 struct rpc_message msg = {
2218 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2219 .rpc_cred = state->owner->so_cred,
2221 struct rpc_task_setup task_setup_data = {
2222 .rpc_client = server->client,
2223 .rpc_message = &msg,
2224 .callback_ops = &nfs4_close_ops,
2225 .workqueue = nfsiod_workqueue,
2226 .flags = RPC_TASK_ASYNC,
2228 int status = -ENOMEM;
2230 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2231 if (calldata == NULL)
2233 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2234 calldata->inode = state->inode;
2235 calldata->state = state;
2236 calldata->arg.fh = NFS_FH(state->inode);
2237 calldata->arg.stateid = &state->open_stateid;
2238 /* Serialization for the sequence id */
2239 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2240 if (calldata->arg.seqid == NULL)
2241 goto out_free_calldata;
2242 calldata->arg.fmode = 0;
2243 calldata->arg.bitmask = server->cache_consistency_bitmask;
2244 calldata->res.fattr = &calldata->fattr;
2245 calldata->res.seqid = calldata->arg.seqid;
2246 calldata->res.server = server;
2247 calldata->roc = pnfs_roc(state->inode);
2248 nfs_sb_active(calldata->inode->i_sb);
2250 msg.rpc_argp = &calldata->arg;
2251 msg.rpc_resp = &calldata->res;
2252 task_setup_data.callback_data = calldata;
2253 task = rpc_run_task(&task_setup_data);
2255 return PTR_ERR(task);
2258 status = rpc_wait_for_completion_task(task);
2264 nfs4_put_open_state(state);
2265 nfs4_put_state_owner(sp);
2269 static struct inode *
2270 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2272 struct nfs4_state *state;
2274 /* Protect against concurrent sillydeletes */
2275 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2276 ctx->cred, &ctx->mdsthreshold);
2278 return ERR_CAST(state);
2280 return igrab(state->inode);
2283 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2285 if (ctx->state == NULL)
2288 nfs4_close_sync(ctx->state, ctx->mode);
2290 nfs4_close_state(ctx->state, ctx->mode);
2293 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2295 struct nfs4_server_caps_arg args = {
2298 struct nfs4_server_caps_res res = {};
2299 struct rpc_message msg = {
2300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2306 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2308 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2309 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2310 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2311 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2312 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2313 NFS_CAP_CTIME|NFS_CAP_MTIME);
2314 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2315 server->caps |= NFS_CAP_ACLS;
2316 if (res.has_links != 0)
2317 server->caps |= NFS_CAP_HARDLINKS;
2318 if (res.has_symlinks != 0)
2319 server->caps |= NFS_CAP_SYMLINKS;
2320 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2321 server->caps |= NFS_CAP_FILEID;
2322 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2323 server->caps |= NFS_CAP_MODE;
2324 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2325 server->caps |= NFS_CAP_NLINK;
2326 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2327 server->caps |= NFS_CAP_OWNER;
2328 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2329 server->caps |= NFS_CAP_OWNER_GROUP;
2330 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2331 server->caps |= NFS_CAP_ATIME;
2332 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2333 server->caps |= NFS_CAP_CTIME;
2334 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2335 server->caps |= NFS_CAP_MTIME;
2337 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2338 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2339 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2340 server->acl_bitmask = res.acl_bitmask;
2341 server->fh_expire_type = res.fh_expire_type;
2347 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2349 struct nfs4_exception exception = { };
2352 err = nfs4_handle_exception(server,
2353 _nfs4_server_capabilities(server, fhandle),
2355 } while (exception.retry);
2359 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2360 struct nfs_fsinfo *info)
2362 struct nfs4_lookup_root_arg args = {
2363 .bitmask = nfs4_fattr_bitmap,
2365 struct nfs4_lookup_res res = {
2367 .fattr = info->fattr,
2370 struct rpc_message msg = {
2371 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2376 nfs_fattr_init(info->fattr);
2377 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2380 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2381 struct nfs_fsinfo *info)
2383 struct nfs4_exception exception = { };
2386 err = _nfs4_lookup_root(server, fhandle, info);
2389 case -NFS4ERR_WRONGSEC:
2392 err = nfs4_handle_exception(server, err, &exception);
2394 } while (exception.retry);
2399 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2400 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2402 struct rpc_auth *auth;
2405 auth = rpcauth_create(flavor, server->client);
2410 ret = nfs4_lookup_root(server, fhandle, info);
2415 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2416 struct nfs_fsinfo *info)
2418 int i, len, status = 0;
2419 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2421 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2425 for (i = 0; i < len; i++) {
2426 /* AUTH_UNIX is the default flavor if none was specified,
2427 * thus has already been tried. */
2428 if (flav_array[i] == RPC_AUTH_UNIX)
2431 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2432 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2437 * -EACCESS could mean that the user doesn't have correct permissions
2438 * to access the mount. It could also mean that we tried to mount
2439 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2440 * existing mount programs don't handle -EACCES very well so it should
2441 * be mapped to -EPERM instead.
2443 if (status == -EACCES)
2449 * get the file handle for the "/" directory on the server
2451 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2452 struct nfs_fsinfo *info)
2454 int minor_version = server->nfs_client->cl_minorversion;
2455 int status = nfs4_lookup_root(server, fhandle, info);
2456 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2458 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2459 * by nfs4_map_errors() as this function exits.
2461 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2463 status = nfs4_server_capabilities(server, fhandle);
2465 status = nfs4_do_fsinfo(server, fhandle, info);
2466 return nfs4_map_errors(status);
2469 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2470 struct nfs_fsinfo *info)
2473 struct nfs_fattr *fattr = info->fattr;
2475 error = nfs4_server_capabilities(server, mntfh);
2477 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2481 error = nfs4_proc_getattr(server, mntfh, fattr);
2483 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2487 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2488 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2489 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2495 * Get locations and (maybe) other attributes of a referral.
2496 * Note that we'll actually follow the referral later when
2497 * we detect fsid mismatch in inode revalidation
2499 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2500 const struct qstr *name, struct nfs_fattr *fattr,
2501 struct nfs_fh *fhandle)
2503 int status = -ENOMEM;
2504 struct page *page = NULL;
2505 struct nfs4_fs_locations *locations = NULL;
2507 page = alloc_page(GFP_KERNEL);
2510 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2511 if (locations == NULL)
2514 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2517 /* Make sure server returned a different fsid for the referral */
2518 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2519 dprintk("%s: server did not return a different fsid for"
2520 " a referral at %s\n", __func__, name->name);
2524 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2525 nfs_fixup_referral_attributes(&locations->fattr);
2527 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2528 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2529 memset(fhandle, 0, sizeof(struct nfs_fh));
2537 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2539 struct nfs4_getattr_arg args = {
2541 .bitmask = server->attr_bitmask,
2543 struct nfs4_getattr_res res = {
2547 struct rpc_message msg = {
2548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2553 nfs_fattr_init(fattr);
2554 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2557 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2559 struct nfs4_exception exception = { };
2562 err = nfs4_handle_exception(server,
2563 _nfs4_proc_getattr(server, fhandle, fattr),
2565 } while (exception.retry);
2570 * The file is not closed if it is opened due to the a request to change
2571 * the size of the file. The open call will not be needed once the
2572 * VFS layer lookup-intents are implemented.
2574 * Close is called when the inode is destroyed.
2575 * If we haven't opened the file for O_WRONLY, we
2576 * need to in the size_change case to obtain a stateid.
2579 * Because OPEN is always done by name in nfsv4, it is
2580 * possible that we opened a different file by the same
2581 * name. We can recognize this race condition, but we
2582 * can't do anything about it besides returning an error.
2584 * This will be fixed with VFS changes (lookup-intent).
2587 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2588 struct iattr *sattr)
2590 struct inode *inode = dentry->d_inode;
2591 struct rpc_cred *cred = NULL;
2592 struct nfs4_state *state = NULL;
2595 if (pnfs_ld_layoutret_on_setattr(inode))
2596 pnfs_return_layout(inode);
2598 nfs_fattr_init(fattr);
2600 /* Deal with open(O_TRUNC) */
2601 if (sattr->ia_valid & ATTR_OPEN)
2602 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2604 /* Optimization: if the end result is no change, don't RPC */
2605 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2608 /* Search for an existing open(O_WRITE) file */
2609 if (sattr->ia_valid & ATTR_FILE) {
2610 struct nfs_open_context *ctx;
2612 ctx = nfs_file_open_context(sattr->ia_file);
2619 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2621 nfs_setattr_update_inode(inode, sattr);
2625 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2626 const struct qstr *name, struct nfs_fh *fhandle,
2627 struct nfs_fattr *fattr)
2629 struct nfs_server *server = NFS_SERVER(dir);
2631 struct nfs4_lookup_arg args = {
2632 .bitmask = server->attr_bitmask,
2633 .dir_fh = NFS_FH(dir),
2636 struct nfs4_lookup_res res = {
2641 struct rpc_message msg = {
2642 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2647 nfs_fattr_init(fattr);
2649 dprintk("NFS call lookup %s\n", name->name);
2650 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2651 dprintk("NFS reply lookup: %d\n", status);
2655 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2657 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2658 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2659 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2663 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2664 struct qstr *name, struct nfs_fh *fhandle,
2665 struct nfs_fattr *fattr)
2667 struct nfs4_exception exception = { };
2668 struct rpc_clnt *client = *clnt;
2671 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2673 case -NFS4ERR_BADNAME:
2676 case -NFS4ERR_MOVED:
2677 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2679 case -NFS4ERR_WRONGSEC:
2681 if (client != *clnt)
2684 client = nfs4_create_sec_client(client, dir, name);
2686 return PTR_ERR(client);
2688 exception.retry = 1;
2691 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2693 } while (exception.retry);
2698 else if (client != *clnt)
2699 rpc_shutdown_client(client);
2704 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2705 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2708 struct rpc_clnt *client = NFS_CLIENT(dir);
2710 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2711 if (client != NFS_CLIENT(dir)) {
2712 rpc_shutdown_client(client);
2713 nfs_fixup_secinfo_attributes(fattr);
2719 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2720 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2723 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2725 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2727 rpc_shutdown_client(client);
2728 return ERR_PTR(status);
2733 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2735 struct nfs_server *server = NFS_SERVER(inode);
2736 struct nfs4_accessargs args = {
2737 .fh = NFS_FH(inode),
2738 .bitmask = server->cache_consistency_bitmask,
2740 struct nfs4_accessres res = {
2743 struct rpc_message msg = {
2744 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2747 .rpc_cred = entry->cred,
2749 int mode = entry->mask;
2753 * Determine which access bits we want to ask for...
2755 if (mode & MAY_READ)
2756 args.access |= NFS4_ACCESS_READ;
2757 if (S_ISDIR(inode->i_mode)) {
2758 if (mode & MAY_WRITE)
2759 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2760 if (mode & MAY_EXEC)
2761 args.access |= NFS4_ACCESS_LOOKUP;
2763 if (mode & MAY_WRITE)
2764 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2765 if (mode & MAY_EXEC)
2766 args.access |= NFS4_ACCESS_EXECUTE;
2769 res.fattr = nfs_alloc_fattr();
2770 if (res.fattr == NULL)
2773 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2775 nfs_access_set_mask(entry, res.access);
2776 nfs_refresh_inode(inode, res.fattr);
2778 nfs_free_fattr(res.fattr);
2782 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2784 struct nfs4_exception exception = { };
2787 err = nfs4_handle_exception(NFS_SERVER(inode),
2788 _nfs4_proc_access(inode, entry),
2790 } while (exception.retry);
2795 * TODO: For the time being, we don't try to get any attributes
2796 * along with any of the zero-copy operations READ, READDIR,
2799 * In the case of the first three, we want to put the GETATTR
2800 * after the read-type operation -- this is because it is hard
2801 * to predict the length of a GETATTR response in v4, and thus
2802 * align the READ data correctly. This means that the GETATTR
2803 * may end up partially falling into the page cache, and we should
2804 * shift it into the 'tail' of the xdr_buf before processing.
2805 * To do this efficiently, we need to know the total length
2806 * of data received, which doesn't seem to be available outside
2809 * In the case of WRITE, we also want to put the GETATTR after
2810 * the operation -- in this case because we want to make sure
2811 * we get the post-operation mtime and size.
2813 * Both of these changes to the XDR layer would in fact be quite
2814 * minor, but I decided to leave them for a subsequent patch.
2816 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2817 unsigned int pgbase, unsigned int pglen)
2819 struct nfs4_readlink args = {
2820 .fh = NFS_FH(inode),
2825 struct nfs4_readlink_res res;
2826 struct rpc_message msg = {
2827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2832 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2835 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2836 unsigned int pgbase, unsigned int pglen)
2838 struct nfs4_exception exception = { };
2841 err = nfs4_handle_exception(NFS_SERVER(inode),
2842 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2844 } while (exception.retry);
2849 * This is just for mknod. open(O_CREAT) will always do ->open_context().
2852 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2855 struct nfs_open_context *ctx;
2856 struct nfs4_state *state;
2859 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2861 return PTR_ERR(ctx);
2863 sattr->ia_mode &= ~current_umask();
2864 state = nfs4_do_open(dir, dentry, ctx->mode,
2865 flags, sattr, ctx->cred,
2866 &ctx->mdsthreshold);
2868 if (IS_ERR(state)) {
2869 status = PTR_ERR(state);
2872 d_add(dentry, igrab(state->inode));
2873 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2876 put_nfs_open_context(ctx);
2880 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2882 struct nfs_server *server = NFS_SERVER(dir);
2883 struct nfs_removeargs args = {
2887 struct nfs_removeres res = {
2890 struct rpc_message msg = {
2891 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2897 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2899 update_changeattr(dir, &res.cinfo);
2903 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2905 struct nfs4_exception exception = { };
2908 err = nfs4_handle_exception(NFS_SERVER(dir),
2909 _nfs4_proc_remove(dir, name),
2911 } while (exception.retry);
2915 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2917 struct nfs_server *server = NFS_SERVER(dir);
2918 struct nfs_removeargs *args = msg->rpc_argp;
2919 struct nfs_removeres *res = msg->rpc_resp;
2921 res->server = server;
2922 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2923 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2926 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2928 nfs4_setup_sequence(NFS_SERVER(data->dir),
2929 &data->args.seq_args,
2934 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2936 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2938 if (!nfs4_sequence_done(task, &res->seq_res))
2940 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2942 update_changeattr(dir, &res->cinfo);
2946 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2948 struct nfs_server *server = NFS_SERVER(dir);
2949 struct nfs_renameargs *arg = msg->rpc_argp;
2950 struct nfs_renameres *res = msg->rpc_resp;
2952 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2953 res->server = server;
2954 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2957 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2959 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2960 &data->args.seq_args,
2965 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2966 struct inode *new_dir)
2968 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2970 if (!nfs4_sequence_done(task, &res->seq_res))
2972 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2975 update_changeattr(old_dir, &res->old_cinfo);
2976 update_changeattr(new_dir, &res->new_cinfo);
2980 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2981 struct inode *new_dir, struct qstr *new_name)
2983 struct nfs_server *server = NFS_SERVER(old_dir);
2984 struct nfs_renameargs arg = {
2985 .old_dir = NFS_FH(old_dir),
2986 .new_dir = NFS_FH(new_dir),
2987 .old_name = old_name,
2988 .new_name = new_name,
2990 struct nfs_renameres res = {
2993 struct rpc_message msg = {
2994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2998 int status = -ENOMEM;
3000 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3002 update_changeattr(old_dir, &res.old_cinfo);
3003 update_changeattr(new_dir, &res.new_cinfo);
3008 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3009 struct inode *new_dir, struct qstr *new_name)
3011 struct nfs4_exception exception = { };
3014 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3015 _nfs4_proc_rename(old_dir, old_name,
3018 } while (exception.retry);
3022 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3024 struct nfs_server *server = NFS_SERVER(inode);
3025 struct nfs4_link_arg arg = {
3026 .fh = NFS_FH(inode),
3027 .dir_fh = NFS_FH(dir),
3029 .bitmask = server->attr_bitmask,
3031 struct nfs4_link_res res = {
3034 struct rpc_message msg = {
3035 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3039 int status = -ENOMEM;
3041 res.fattr = nfs_alloc_fattr();
3042 if (res.fattr == NULL)
3045 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3047 update_changeattr(dir, &res.cinfo);
3048 nfs_post_op_update_inode(inode, res.fattr);
3051 nfs_free_fattr(res.fattr);
3055 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3057 struct nfs4_exception exception = { };
3060 err = nfs4_handle_exception(NFS_SERVER(inode),
3061 _nfs4_proc_link(inode, dir, name),
3063 } while (exception.retry);
3067 struct nfs4_createdata {
3068 struct rpc_message msg;
3069 struct nfs4_create_arg arg;
3070 struct nfs4_create_res res;
3072 struct nfs_fattr fattr;
3075 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3076 struct qstr *name, struct iattr *sattr, u32 ftype)
3078 struct nfs4_createdata *data;
3080 data = kzalloc(sizeof(*data), GFP_KERNEL);
3082 struct nfs_server *server = NFS_SERVER(dir);
3084 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3085 data->msg.rpc_argp = &data->arg;
3086 data->msg.rpc_resp = &data->res;
3087 data->arg.dir_fh = NFS_FH(dir);
3088 data->arg.server = server;
3089 data->arg.name = name;
3090 data->arg.attrs = sattr;
3091 data->arg.ftype = ftype;
3092 data->arg.bitmask = server->attr_bitmask;
3093 data->res.server = server;
3094 data->res.fh = &data->fh;
3095 data->res.fattr = &data->fattr;
3096 nfs_fattr_init(data->res.fattr);
3101 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3103 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3104 &data->arg.seq_args, &data->res.seq_res, 1);
3106 update_changeattr(dir, &data->res.dir_cinfo);
3107 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3112 static void nfs4_free_createdata(struct nfs4_createdata *data)
3117 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3118 struct page *page, unsigned int len, struct iattr *sattr)
3120 struct nfs4_createdata *data;
3121 int status = -ENAMETOOLONG;
3123 if (len > NFS4_MAXPATHLEN)
3127 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3131 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3132 data->arg.u.symlink.pages = &page;
3133 data->arg.u.symlink.len = len;
3135 status = nfs4_do_create(dir, dentry, data);
3137 nfs4_free_createdata(data);
3142 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3143 struct page *page, unsigned int len, struct iattr *sattr)
3145 struct nfs4_exception exception = { };
3148 err = nfs4_handle_exception(NFS_SERVER(dir),
3149 _nfs4_proc_symlink(dir, dentry, page,
3152 } while (exception.retry);
3156 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3157 struct iattr *sattr)
3159 struct nfs4_createdata *data;
3160 int status = -ENOMEM;
3162 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3166 status = nfs4_do_create(dir, dentry, data);
3168 nfs4_free_createdata(data);
3173 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3174 struct iattr *sattr)
3176 struct nfs4_exception exception = { };
3179 sattr->ia_mode &= ~current_umask();
3181 err = nfs4_handle_exception(NFS_SERVER(dir),
3182 _nfs4_proc_mkdir(dir, dentry, sattr),
3184 } while (exception.retry);
3188 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3189 u64 cookie, struct page **pages, unsigned int count, int plus)
3191 struct inode *dir = dentry->d_inode;
3192 struct nfs4_readdir_arg args = {
3197 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3200 struct nfs4_readdir_res res;
3201 struct rpc_message msg = {
3202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3209 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3210 dentry->d_parent->d_name.name,
3211 dentry->d_name.name,
3212 (unsigned long long)cookie);
3213 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3214 res.pgbase = args.pgbase;
3215 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3217 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3218 status += args.pgbase;
3221 nfs_invalidate_atime(dir);
3223 dprintk("%s: returns %d\n", __func__, status);
3227 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3228 u64 cookie, struct page **pages, unsigned int count, int plus)
3230 struct nfs4_exception exception = { };
3233 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3234 _nfs4_proc_readdir(dentry, cred, cookie,
3235 pages, count, plus),
3237 } while (exception.retry);
3241 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3242 struct iattr *sattr, dev_t rdev)
3244 struct nfs4_createdata *data;
3245 int mode = sattr->ia_mode;
3246 int status = -ENOMEM;
3248 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3253 data->arg.ftype = NF4FIFO;
3254 else if (S_ISBLK(mode)) {
3255 data->arg.ftype = NF4BLK;
3256 data->arg.u.device.specdata1 = MAJOR(rdev);
3257 data->arg.u.device.specdata2 = MINOR(rdev);
3259 else if (S_ISCHR(mode)) {
3260 data->arg.ftype = NF4CHR;
3261 data->arg.u.device.specdata1 = MAJOR(rdev);
3262 data->arg.u.device.specdata2 = MINOR(rdev);
3263 } else if (!S_ISSOCK(mode)) {
3268 status = nfs4_do_create(dir, dentry, data);
3270 nfs4_free_createdata(data);
3275 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3276 struct iattr *sattr, dev_t rdev)
3278 struct nfs4_exception exception = { };
3281 sattr->ia_mode &= ~current_umask();
3283 err = nfs4_handle_exception(NFS_SERVER(dir),
3284 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3286 } while (exception.retry);
3290 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3291 struct nfs_fsstat *fsstat)
3293 struct nfs4_statfs_arg args = {
3295 .bitmask = server->attr_bitmask,
3297 struct nfs4_statfs_res res = {
3300 struct rpc_message msg = {
3301 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3306 nfs_fattr_init(fsstat->fattr);
3307 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3310 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3312 struct nfs4_exception exception = { };
3315 err = nfs4_handle_exception(server,
3316 _nfs4_proc_statfs(server, fhandle, fsstat),
3318 } while (exception.retry);
3322 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3323 struct nfs_fsinfo *fsinfo)
3325 struct nfs4_fsinfo_arg args = {
3327 .bitmask = server->attr_bitmask,
3329 struct nfs4_fsinfo_res res = {
3332 struct rpc_message msg = {
3333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3338 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3341 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3343 struct nfs4_exception exception = { };
3347 err = nfs4_handle_exception(server,
3348 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3350 } while (exception.retry);
3354 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3358 nfs_fattr_init(fsinfo->fattr);
3359 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3361 /* block layout checks this! */
3362 server->pnfs_blksize = fsinfo->blksize;
3363 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3369 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3370 struct nfs_pathconf *pathconf)
3372 struct nfs4_pathconf_arg args = {
3374 .bitmask = server->attr_bitmask,
3376 struct nfs4_pathconf_res res = {
3377 .pathconf = pathconf,
3379 struct rpc_message msg = {
3380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3385 /* None of the pathconf attributes are mandatory to implement */
3386 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3387 memset(pathconf, 0, sizeof(*pathconf));
3391 nfs_fattr_init(pathconf->fattr);
3392 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3395 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3396 struct nfs_pathconf *pathconf)
3398 struct nfs4_exception exception = { };
3402 err = nfs4_handle_exception(server,
3403 _nfs4_proc_pathconf(server, fhandle, pathconf),
3405 } while (exception.retry);
3409 void __nfs4_read_done_cb(struct nfs_read_data *data)
3411 nfs_invalidate_atime(data->header->inode);
3414 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3416 struct nfs_server *server = NFS_SERVER(data->header->inode);
3418 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3419 rpc_restart_call_prepare(task);
3423 __nfs4_read_done_cb(data);
3424 if (task->tk_status > 0)
3425 renew_lease(server, data->timestamp);
3429 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3432 dprintk("--> %s\n", __func__);
3434 if (!nfs4_sequence_done(task, &data->res.seq_res))
3437 return data->read_done_cb ? data->read_done_cb(task, data) :
3438 nfs4_read_done_cb(task, data);
3441 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3443 data->timestamp = jiffies;
3444 data->read_done_cb = nfs4_read_done_cb;
3445 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3446 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3449 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3451 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3452 &data->args.seq_args,
3457 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3459 struct inode *inode = data->header->inode;
3461 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3462 rpc_restart_call_prepare(task);
3465 if (task->tk_status >= 0) {
3466 renew_lease(NFS_SERVER(inode), data->timestamp);
3467 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3472 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3474 if (!nfs4_sequence_done(task, &data->res.seq_res))
3476 return data->write_done_cb ? data->write_done_cb(task, data) :
3477 nfs4_write_done_cb(task, data);
3481 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3483 const struct nfs_pgio_header *hdr = data->header;
3485 /* Don't request attributes for pNFS or O_DIRECT writes */
3486 if (data->ds_clp != NULL || hdr->dreq != NULL)
3488 /* Otherwise, request attributes if and only if we don't hold
3491 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3494 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3496 struct nfs_server *server = NFS_SERVER(data->header->inode);
3498 if (!nfs4_write_need_cache_consistency_data(data)) {
3499 data->args.bitmask = NULL;
3500 data->res.fattr = NULL;
3502 data->args.bitmask = server->cache_consistency_bitmask;
3504 if (!data->write_done_cb)
3505 data->write_done_cb = nfs4_write_done_cb;
3506 data->res.server = server;
3507 data->timestamp = jiffies;
3509 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3510 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3513 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3515 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3516 &data->args.seq_args,
3521 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3523 nfs4_setup_sequence(NFS_SERVER(data->inode),
3524 &data->args.seq_args,
3529 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3531 struct inode *inode = data->inode;
3533 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3534 rpc_restart_call_prepare(task);
3540 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3542 if (!nfs4_sequence_done(task, &data->res.seq_res))
3544 return data->commit_done_cb(task, data);
3547 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3549 struct nfs_server *server = NFS_SERVER(data->inode);
3551 if (data->commit_done_cb == NULL)
3552 data->commit_done_cb = nfs4_commit_done_cb;
3553 data->res.server = server;
3554 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3555 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3558 struct nfs4_renewdata {
3559 struct nfs_client *client;
3560 unsigned long timestamp;
3564 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3565 * standalone procedure for queueing an asynchronous RENEW.
3567 static void nfs4_renew_release(void *calldata)
3569 struct nfs4_renewdata *data = calldata;
3570 struct nfs_client *clp = data->client;
3572 if (atomic_read(&clp->cl_count) > 1)
3573 nfs4_schedule_state_renewal(clp);
3574 nfs_put_client(clp);
3578 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3580 struct nfs4_renewdata *data = calldata;
3581 struct nfs_client *clp = data->client;
3582 unsigned long timestamp = data->timestamp;
3584 if (task->tk_status < 0) {
3585 /* Unless we're shutting down, schedule state recovery! */
3586 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3588 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3589 nfs4_schedule_lease_recovery(clp);
3592 nfs4_schedule_path_down_recovery(clp);
3594 do_renew_lease(clp, timestamp);
3597 static const struct rpc_call_ops nfs4_renew_ops = {
3598 .rpc_call_done = nfs4_renew_done,
3599 .rpc_release = nfs4_renew_release,
3602 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3604 struct rpc_message msg = {
3605 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3609 struct nfs4_renewdata *data;
3611 if (renew_flags == 0)
3613 if (!atomic_inc_not_zero(&clp->cl_count))
3615 data = kmalloc(sizeof(*data), GFP_NOFS);
3619 data->timestamp = jiffies;
3620 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3621 &nfs4_renew_ops, data);
3624 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3626 struct rpc_message msg = {
3627 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3631 unsigned long now = jiffies;
3634 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3637 do_renew_lease(clp, now);
3641 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3643 return (server->caps & NFS_CAP_ACLS)
3644 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3645 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3648 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3649 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3652 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3654 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3655 struct page **pages, unsigned int *pgbase)
3657 struct page *newpage, **spages;
3663 len = min_t(size_t, PAGE_SIZE, buflen);
3664 newpage = alloc_page(GFP_KERNEL);
3666 if (newpage == NULL)
3668 memcpy(page_address(newpage), buf, len);
3673 } while (buflen != 0);
3679 __free_page(spages[rc-1]);
3683 struct nfs4_cached_acl {
3689 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3691 struct nfs_inode *nfsi = NFS_I(inode);
3693 spin_lock(&inode->i_lock);
3694 kfree(nfsi->nfs4_acl);
3695 nfsi->nfs4_acl = acl;
3696 spin_unlock(&inode->i_lock);
3699 static void nfs4_zap_acl_attr(struct inode *inode)
3701 nfs4_set_cached_acl(inode, NULL);
3704 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3706 struct nfs_inode *nfsi = NFS_I(inode);
3707 struct nfs4_cached_acl *acl;
3710 spin_lock(&inode->i_lock);
3711 acl = nfsi->nfs4_acl;
3714 if (buf == NULL) /* user is just asking for length */
3716 if (acl->cached == 0)
3718 ret = -ERANGE; /* see getxattr(2) man page */
3719 if (acl->len > buflen)
3721 memcpy(buf, acl->data, acl->len);
3725 spin_unlock(&inode->i_lock);
3729 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3731 struct nfs4_cached_acl *acl;
3732 size_t buflen = sizeof(*acl) + acl_len;
3734 if (buflen <= PAGE_SIZE) {
3735 acl = kmalloc(buflen, GFP_KERNEL);
3739 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3741 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3748 nfs4_set_cached_acl(inode, acl);
3752 * The getxattr API returns the required buffer length when called with a
3753 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3754 * the required buf. On a NULL buf, we send a page of data to the server
3755 * guessing that the ACL request can be serviced by a page. If so, we cache
3756 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3757 * the cache. If not so, we throw away the page, and cache the required
3758 * length. The next getxattr call will then produce another round trip to
3759 * the server, this time with the input buf of the required size.
3761 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3763 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3764 struct nfs_getaclargs args = {
3765 .fh = NFS_FH(inode),
3769 struct nfs_getaclres res = {
3772 struct rpc_message msg = {
3773 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3777 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3778 int ret = -ENOMEM, i;
3780 /* As long as we're doing a round trip to the server anyway,
3781 * let's be prepared for a page of acl data. */
3784 if (npages > ARRAY_SIZE(pages))
3787 for (i = 0; i < npages; i++) {
3788 pages[i] = alloc_page(GFP_KERNEL);
3793 /* for decoding across pages */
3794 res.acl_scratch = alloc_page(GFP_KERNEL);
3795 if (!res.acl_scratch)
3798 args.acl_len = npages * PAGE_SIZE;
3799 args.acl_pgbase = 0;
3801 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3802 __func__, buf, buflen, npages, args.acl_len);
3803 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3804 &msg, &args.seq_args, &res.seq_res, 0);
3808 /* Handle the case where the passed-in buffer is too short */
3809 if (res.acl_flags & NFS4_ACL_TRUNC) {
3810 /* Did the user only issue a request for the acl length? */
3816 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3818 if (res.acl_len > buflen) {
3822 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3827 for (i = 0; i < npages; i++)
3829 __free_page(pages[i]);
3830 if (res.acl_scratch)
3831 __free_page(res.acl_scratch);
3835 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3837 struct nfs4_exception exception = { };
3840 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3843 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3844 } while (exception.retry);
3848 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3850 struct nfs_server *server = NFS_SERVER(inode);
3853 if (!nfs4_server_supports_acls(server))
3855 ret = nfs_revalidate_inode(server, inode);
3858 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3859 nfs_zap_acl_cache(inode);
3860 ret = nfs4_read_cached_acl(inode, buf, buflen);
3862 /* -ENOENT is returned if there is no ACL or if there is an ACL
3863 * but no cached acl data, just the acl length */
3865 return nfs4_get_acl_uncached(inode, buf, buflen);
3868 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3870 struct nfs_server *server = NFS_SERVER(inode);
3871 struct page *pages[NFS4ACL_MAXPAGES];
3872 struct nfs_setaclargs arg = {
3873 .fh = NFS_FH(inode),
3877 struct nfs_setaclres res;
3878 struct rpc_message msg = {
3879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3883 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3886 if (!nfs4_server_supports_acls(server))
3888 if (npages > ARRAY_SIZE(pages))
3890 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3893 nfs4_inode_return_delegation(inode);
3894 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3897 * Free each page after tx, so the only ref left is
3898 * held by the network stack
3901 put_page(pages[i-1]);
3904 * Acl update can result in inode attribute update.
3905 * so mark the attribute cache invalid.
3907 spin_lock(&inode->i_lock);
3908 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3909 spin_unlock(&inode->i_lock);
3910 nfs_access_zap_cache(inode);
3911 nfs_zap_acl_cache(inode);
3915 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3917 struct nfs4_exception exception = { };
3920 err = nfs4_handle_exception(NFS_SERVER(inode),
3921 __nfs4_proc_set_acl(inode, buf, buflen),
3923 } while (exception.retry);
3928 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3930 struct nfs_client *clp = server->nfs_client;
3932 if (task->tk_status >= 0)
3934 switch(task->tk_status) {
3935 case -NFS4ERR_DELEG_REVOKED:
3936 case -NFS4ERR_ADMIN_REVOKED:
3937 case -NFS4ERR_BAD_STATEID:
3940 nfs_remove_bad_delegation(state->inode);
3941 case -NFS4ERR_OPENMODE:
3944 nfs4_schedule_stateid_recovery(server, state);
3945 goto wait_on_recovery;
3946 case -NFS4ERR_EXPIRED:
3948 nfs4_schedule_stateid_recovery(server, state);
3949 case -NFS4ERR_STALE_STATEID:
3950 case -NFS4ERR_STALE_CLIENTID:
3951 nfs4_schedule_lease_recovery(clp);
3952 goto wait_on_recovery;
3953 #if defined(CONFIG_NFS_V4_1)
3954 case -NFS4ERR_BADSESSION:
3955 case -NFS4ERR_BADSLOT:
3956 case -NFS4ERR_BAD_HIGH_SLOT:
3957 case -NFS4ERR_DEADSESSION:
3958 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3959 case -NFS4ERR_SEQ_FALSE_RETRY:
3960 case -NFS4ERR_SEQ_MISORDERED:
3961 dprintk("%s ERROR %d, Reset session\n", __func__,
3963 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
3964 task->tk_status = 0;
3966 #endif /* CONFIG_NFS_V4_1 */
3967 case -NFS4ERR_DELAY:
3968 nfs_inc_server_stats(server, NFSIOS_DELAY);
3969 case -NFS4ERR_GRACE:
3970 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3971 task->tk_status = 0;
3973 case -NFS4ERR_RETRY_UNCACHED_REP:
3974 case -NFS4ERR_OLD_STATEID:
3975 task->tk_status = 0;
3978 task->tk_status = nfs4_map_errors(task->tk_status);
3981 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3982 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3983 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3984 task->tk_status = 0;
3988 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3989 nfs4_verifier *bootverf)
3993 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
3994 /* An impossible timestamp guarantees this value
3995 * will never match a generated boot time. */
3997 verf[1] = (__be32)(NSEC_PER_SEC + 1);
3999 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4000 verf[0] = (__be32)nn->boot_time.tv_sec;
4001 verf[1] = (__be32)nn->boot_time.tv_nsec;
4003 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4007 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4008 char *buf, size_t len)
4010 unsigned int result;
4013 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4015 rpc_peeraddr2str(clp->cl_rpcclient,
4017 rpc_peeraddr2str(clp->cl_rpcclient,
4018 RPC_DISPLAY_PROTO));
4024 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4025 char *buf, size_t len)
4027 char *nodename = clp->cl_rpcclient->cl_nodename;
4029 if (nfs4_client_id_uniquifier[0] != '\0')
4030 nodename = nfs4_client_id_uniquifier;
4031 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4032 clp->rpc_ops->version, clp->cl_minorversion,
4037 * nfs4_proc_setclientid - Negotiate client ID
4038 * @clp: state data structure
4039 * @program: RPC program for NFSv4 callback service
4040 * @port: IP port number for NFS4 callback service
4041 * @cred: RPC credential to use for this call
4042 * @res: where to place the result
4044 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4046 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4047 unsigned short port, struct rpc_cred *cred,
4048 struct nfs4_setclientid_res *res)
4050 nfs4_verifier sc_verifier;
4051 struct nfs4_setclientid setclientid = {
4052 .sc_verifier = &sc_verifier,
4054 .sc_cb_ident = clp->cl_cb_ident,
4056 struct rpc_message msg = {
4057 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4058 .rpc_argp = &setclientid,
4064 /* nfs_client_id4 */
4065 nfs4_init_boot_verifier(clp, &sc_verifier);
4066 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4067 setclientid.sc_name_len =
4068 nfs4_init_uniform_client_string(clp,
4069 setclientid.sc_name,
4070 sizeof(setclientid.sc_name));
4072 setclientid.sc_name_len =
4073 nfs4_init_nonuniform_client_string(clp,
4074 setclientid.sc_name,
4075 sizeof(setclientid.sc_name));
4078 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4079 sizeof(setclientid.sc_netid),
4080 rpc_peeraddr2str(clp->cl_rpcclient,
4081 RPC_DISPLAY_NETID));
4083 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4084 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4085 clp->cl_ipaddr, port >> 8, port & 255);
4087 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4088 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4089 setclientid.sc_name_len, setclientid.sc_name);
4090 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4091 dprintk("NFS reply setclientid: %d\n", status);
4096 * nfs4_proc_setclientid_confirm - Confirm client ID
4097 * @clp: state data structure
4098 * @res: result of a previous SETCLIENTID
4099 * @cred: RPC credential to use for this call
4101 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4103 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4104 struct nfs4_setclientid_res *arg,
4105 struct rpc_cred *cred)
4107 struct nfs_fsinfo fsinfo;
4108 struct rpc_message msg = {
4109 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4111 .rpc_resp = &fsinfo,
4117 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4118 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4121 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4123 spin_lock(&clp->cl_lock);
4124 clp->cl_lease_time = fsinfo.lease_time * HZ;
4125 clp->cl_last_renewal = now;
4126 spin_unlock(&clp->cl_lock);
4128 dprintk("NFS reply setclientid_confirm: %d\n", status);
4132 struct nfs4_delegreturndata {
4133 struct nfs4_delegreturnargs args;
4134 struct nfs4_delegreturnres res;
4136 nfs4_stateid stateid;
4137 unsigned long timestamp;
4138 struct nfs_fattr fattr;
4142 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4144 struct nfs4_delegreturndata *data = calldata;
4146 if (!nfs4_sequence_done(task, &data->res.seq_res))
4149 switch (task->tk_status) {
4150 case -NFS4ERR_STALE_STATEID:
4151 case -NFS4ERR_EXPIRED:
4153 renew_lease(data->res.server, data->timestamp);
4156 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4158 rpc_restart_call_prepare(task);
4162 data->rpc_status = task->tk_status;
4165 static void nfs4_delegreturn_release(void *calldata)
4170 #if defined(CONFIG_NFS_V4_1)
4171 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4173 struct nfs4_delegreturndata *d_data;
4175 d_data = (struct nfs4_delegreturndata *)data;
4177 nfs4_setup_sequence(d_data->res.server,
4178 &d_data->args.seq_args,
4179 &d_data->res.seq_res,
4182 #endif /* CONFIG_NFS_V4_1 */
4184 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4185 #if defined(CONFIG_NFS_V4_1)
4186 .rpc_call_prepare = nfs4_delegreturn_prepare,
4187 #endif /* CONFIG_NFS_V4_1 */
4188 .rpc_call_done = nfs4_delegreturn_done,
4189 .rpc_release = nfs4_delegreturn_release,
4192 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4194 struct nfs4_delegreturndata *data;
4195 struct nfs_server *server = NFS_SERVER(inode);
4196 struct rpc_task *task;
4197 struct rpc_message msg = {
4198 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4201 struct rpc_task_setup task_setup_data = {
4202 .rpc_client = server->client,
4203 .rpc_message = &msg,
4204 .callback_ops = &nfs4_delegreturn_ops,
4205 .flags = RPC_TASK_ASYNC,
4209 data = kzalloc(sizeof(*data), GFP_NOFS);
4212 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4213 data->args.fhandle = &data->fh;
4214 data->args.stateid = &data->stateid;
4215 data->args.bitmask = server->cache_consistency_bitmask;
4216 nfs_copy_fh(&data->fh, NFS_FH(inode));
4217 nfs4_stateid_copy(&data->stateid, stateid);
4218 data->res.fattr = &data->fattr;
4219 data->res.server = server;
4220 nfs_fattr_init(data->res.fattr);
4221 data->timestamp = jiffies;
4222 data->rpc_status = 0;
4224 task_setup_data.callback_data = data;
4225 msg.rpc_argp = &data->args;
4226 msg.rpc_resp = &data->res;
4227 task = rpc_run_task(&task_setup_data);
4229 return PTR_ERR(task);
4232 status = nfs4_wait_for_completion_rpc_task(task);
4235 status = data->rpc_status;
4237 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4239 nfs_refresh_inode(inode, &data->fattr);
4245 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4247 struct nfs_server *server = NFS_SERVER(inode);
4248 struct nfs4_exception exception = { };
4251 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4253 case -NFS4ERR_STALE_STATEID:
4254 case -NFS4ERR_EXPIRED:
4258 err = nfs4_handle_exception(server, err, &exception);
4259 } while (exception.retry);
4263 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4264 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4267 * sleep, with exponential backoff, and retry the LOCK operation.
4269 static unsigned long
4270 nfs4_set_lock_task_retry(unsigned long timeout)
4272 freezable_schedule_timeout_killable(timeout);
4274 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4275 return NFS4_LOCK_MAXTIMEOUT;
4279 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4281 struct inode *inode = state->inode;
4282 struct nfs_server *server = NFS_SERVER(inode);
4283 struct nfs_client *clp = server->nfs_client;
4284 struct nfs_lockt_args arg = {
4285 .fh = NFS_FH(inode),
4288 struct nfs_lockt_res res = {
4291 struct rpc_message msg = {
4292 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4295 .rpc_cred = state->owner->so_cred,
4297 struct nfs4_lock_state *lsp;
4300 arg.lock_owner.clientid = clp->cl_clientid;
4301 status = nfs4_set_lock_state(state, request);
4304 lsp = request->fl_u.nfs4_fl.owner;
4305 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4306 arg.lock_owner.s_dev = server->s_dev;
4307 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4310 request->fl_type = F_UNLCK;
4312 case -NFS4ERR_DENIED:
4315 request->fl_ops->fl_release_private(request);
4320 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4322 struct nfs4_exception exception = { };
4326 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4327 _nfs4_proc_getlk(state, cmd, request),
4329 } while (exception.retry);
4333 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4336 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4338 res = posix_lock_file_wait(file, fl);
4341 res = flock_lock_file_wait(file, fl);
4349 struct nfs4_unlockdata {
4350 struct nfs_locku_args arg;
4351 struct nfs_locku_res res;
4352 struct nfs4_lock_state *lsp;
4353 struct nfs_open_context *ctx;
4354 struct file_lock fl;
4355 const struct nfs_server *server;
4356 unsigned long timestamp;
4359 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4360 struct nfs_open_context *ctx,
4361 struct nfs4_lock_state *lsp,
4362 struct nfs_seqid *seqid)
4364 struct nfs4_unlockdata *p;
4365 struct inode *inode = lsp->ls_state->inode;
4367 p = kzalloc(sizeof(*p), GFP_NOFS);
4370 p->arg.fh = NFS_FH(inode);
4372 p->arg.seqid = seqid;
4373 p->res.seqid = seqid;
4374 p->arg.stateid = &lsp->ls_stateid;
4376 atomic_inc(&lsp->ls_count);
4377 /* Ensure we don't close file until we're done freeing locks! */
4378 p->ctx = get_nfs_open_context(ctx);
4379 memcpy(&p->fl, fl, sizeof(p->fl));
4380 p->server = NFS_SERVER(inode);
4384 static void nfs4_locku_release_calldata(void *data)
4386 struct nfs4_unlockdata *calldata = data;
4387 nfs_free_seqid(calldata->arg.seqid);
4388 nfs4_put_lock_state(calldata->lsp);
4389 put_nfs_open_context(calldata->ctx);
4393 static void nfs4_locku_done(struct rpc_task *task, void *data)
4395 struct nfs4_unlockdata *calldata = data;
4397 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4399 switch (task->tk_status) {
4401 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4402 &calldata->res.stateid);
4403 renew_lease(calldata->server, calldata->timestamp);
4405 case -NFS4ERR_BAD_STATEID:
4406 case -NFS4ERR_OLD_STATEID:
4407 case -NFS4ERR_STALE_STATEID:
4408 case -NFS4ERR_EXPIRED:
4411 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4412 rpc_restart_call_prepare(task);
4414 nfs_release_seqid(calldata->arg.seqid);
4417 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4419 struct nfs4_unlockdata *calldata = data;
4421 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4423 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
4424 /* Note: exit _without_ running nfs4_locku_done */
4425 task->tk_action = NULL;
4426 nfs4_sequence_done(task, &calldata->res.seq_res);
4429 calldata->timestamp = jiffies;
4430 if (nfs4_setup_sequence(calldata->server,
4431 &calldata->arg.seq_args,
4432 &calldata->res.seq_res,
4434 nfs_release_seqid(calldata->arg.seqid);
4437 static const struct rpc_call_ops nfs4_locku_ops = {
4438 .rpc_call_prepare = nfs4_locku_prepare,
4439 .rpc_call_done = nfs4_locku_done,
4440 .rpc_release = nfs4_locku_release_calldata,
4443 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4444 struct nfs_open_context *ctx,
4445 struct nfs4_lock_state *lsp,
4446 struct nfs_seqid *seqid)
4448 struct nfs4_unlockdata *data;
4449 struct rpc_message msg = {
4450 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4451 .rpc_cred = ctx->cred,
4453 struct rpc_task_setup task_setup_data = {
4454 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4455 .rpc_message = &msg,
4456 .callback_ops = &nfs4_locku_ops,
4457 .workqueue = nfsiod_workqueue,
4458 .flags = RPC_TASK_ASYNC,
4461 /* Ensure this is an unlock - when canceling a lock, the
4462 * canceled lock is passed in, and it won't be an unlock.
4464 fl->fl_type = F_UNLCK;
4466 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4468 nfs_free_seqid(seqid);
4469 return ERR_PTR(-ENOMEM);
4472 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4473 msg.rpc_argp = &data->arg;
4474 msg.rpc_resp = &data->res;
4475 task_setup_data.callback_data = data;
4476 return rpc_run_task(&task_setup_data);
4479 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4481 struct nfs_inode *nfsi = NFS_I(state->inode);
4482 struct nfs_seqid *seqid;
4483 struct nfs4_lock_state *lsp;
4484 struct rpc_task *task;
4486 unsigned char fl_flags = request->fl_flags;
4488 status = nfs4_set_lock_state(state, request);
4489 /* Unlock _before_ we do the RPC call */
4490 request->fl_flags |= FL_EXISTS;
4491 down_read(&nfsi->rwsem);
4492 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4493 up_read(&nfsi->rwsem);
4496 up_read(&nfsi->rwsem);
4499 /* Is this a delegated lock? */
4500 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4502 lsp = request->fl_u.nfs4_fl.owner;
4503 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4507 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4508 status = PTR_ERR(task);
4511 status = nfs4_wait_for_completion_rpc_task(task);
4514 request->fl_flags = fl_flags;
4518 struct nfs4_lockdata {
4519 struct nfs_lock_args arg;
4520 struct nfs_lock_res res;
4521 struct nfs4_lock_state *lsp;
4522 struct nfs_open_context *ctx;
4523 struct file_lock fl;
4524 unsigned long timestamp;
4527 struct nfs_server *server;
4530 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4531 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4534 struct nfs4_lockdata *p;
4535 struct inode *inode = lsp->ls_state->inode;
4536 struct nfs_server *server = NFS_SERVER(inode);
4538 p = kzalloc(sizeof(*p), gfp_mask);
4542 p->arg.fh = NFS_FH(inode);
4544 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4545 if (p->arg.open_seqid == NULL)
4547 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4548 if (p->arg.lock_seqid == NULL)
4549 goto out_free_seqid;
4550 p->arg.lock_stateid = &lsp->ls_stateid;
4551 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4552 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4553 p->arg.lock_owner.s_dev = server->s_dev;
4554 p->res.lock_seqid = p->arg.lock_seqid;
4557 atomic_inc(&lsp->ls_count);
4558 p->ctx = get_nfs_open_context(ctx);
4559 memcpy(&p->fl, fl, sizeof(p->fl));
4562 nfs_free_seqid(p->arg.open_seqid);
4568 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4570 struct nfs4_lockdata *data = calldata;
4571 struct nfs4_state *state = data->lsp->ls_state;
4573 dprintk("%s: begin!\n", __func__);
4574 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4576 /* Do we need to do an open_to_lock_owner? */
4577 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4578 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
4579 goto out_release_lock_seqid;
4581 data->arg.open_stateid = &state->stateid;
4582 data->arg.new_lock_owner = 1;
4583 data->res.open_seqid = data->arg.open_seqid;
4585 data->arg.new_lock_owner = 0;
4586 data->timestamp = jiffies;
4587 if (nfs4_setup_sequence(data->server,
4588 &data->arg.seq_args,
4592 nfs_release_seqid(data->arg.open_seqid);
4593 out_release_lock_seqid:
4594 nfs_release_seqid(data->arg.lock_seqid);
4595 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4598 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4600 struct nfs4_lockdata *data = calldata;
4602 dprintk("%s: begin!\n", __func__);
4604 if (!nfs4_sequence_done(task, &data->res.seq_res))
4607 data->rpc_status = task->tk_status;
4608 if (data->arg.new_lock_owner != 0) {
4609 if (data->rpc_status == 0)
4610 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4614 if (data->rpc_status == 0) {
4615 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4616 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
4617 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4620 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4623 static void nfs4_lock_release(void *calldata)
4625 struct nfs4_lockdata *data = calldata;
4627 dprintk("%s: begin!\n", __func__);
4628 nfs_free_seqid(data->arg.open_seqid);
4629 if (data->cancelled != 0) {
4630 struct rpc_task *task;
4631 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4632 data->arg.lock_seqid);
4634 rpc_put_task_async(task);
4635 dprintk("%s: cancelling lock!\n", __func__);
4637 nfs_free_seqid(data->arg.lock_seqid);
4638 nfs4_put_lock_state(data->lsp);
4639 put_nfs_open_context(data->ctx);
4641 dprintk("%s: done!\n", __func__);
4644 static const struct rpc_call_ops nfs4_lock_ops = {
4645 .rpc_call_prepare = nfs4_lock_prepare,
4646 .rpc_call_done = nfs4_lock_done,
4647 .rpc_release = nfs4_lock_release,
4650 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4653 case -NFS4ERR_ADMIN_REVOKED:
4654 case -NFS4ERR_BAD_STATEID:
4655 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4656 if (new_lock_owner != 0 ||
4657 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
4658 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4660 case -NFS4ERR_STALE_STATEID:
4661 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4662 case -NFS4ERR_EXPIRED:
4663 nfs4_schedule_lease_recovery(server->nfs_client);
4667 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4669 struct nfs4_lockdata *data;
4670 struct rpc_task *task;
4671 struct rpc_message msg = {
4672 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4673 .rpc_cred = state->owner->so_cred,
4675 struct rpc_task_setup task_setup_data = {
4676 .rpc_client = NFS_CLIENT(state->inode),
4677 .rpc_message = &msg,
4678 .callback_ops = &nfs4_lock_ops,
4679 .workqueue = nfsiod_workqueue,
4680 .flags = RPC_TASK_ASYNC,
4684 dprintk("%s: begin!\n", __func__);
4685 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4686 fl->fl_u.nfs4_fl.owner,
4687 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4691 data->arg.block = 1;
4692 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4693 msg.rpc_argp = &data->arg;
4694 msg.rpc_resp = &data->res;
4695 task_setup_data.callback_data = data;
4696 if (recovery_type > NFS_LOCK_NEW) {
4697 if (recovery_type == NFS_LOCK_RECLAIM)
4698 data->arg.reclaim = NFS_LOCK_RECLAIM;
4699 nfs4_set_sequence_privileged(&data->arg.seq_args);
4701 task = rpc_run_task(&task_setup_data);
4703 return PTR_ERR(task);
4704 ret = nfs4_wait_for_completion_rpc_task(task);
4706 ret = data->rpc_status;
4708 nfs4_handle_setlk_error(data->server, data->lsp,
4709 data->arg.new_lock_owner, ret);
4711 data->cancelled = 1;
4713 dprintk("%s: done, ret = %d!\n", __func__, ret);
4717 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4719 struct nfs_server *server = NFS_SERVER(state->inode);
4720 struct nfs4_exception exception = {
4721 .inode = state->inode,
4726 /* Cache the lock if possible... */
4727 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4729 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4730 if (err != -NFS4ERR_DELAY)
4732 nfs4_handle_exception(server, err, &exception);
4733 } while (exception.retry);
4737 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4739 struct nfs_server *server = NFS_SERVER(state->inode);
4740 struct nfs4_exception exception = {
4741 .inode = state->inode,
4745 err = nfs4_set_lock_state(state, request);
4749 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4751 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4755 case -NFS4ERR_GRACE:
4756 case -NFS4ERR_DELAY:
4757 nfs4_handle_exception(server, err, &exception);
4760 } while (exception.retry);
4765 #if defined(CONFIG_NFS_V4_1)
4767 * nfs41_check_expired_locks - possibly free a lock stateid
4769 * @state: NFSv4 state for an inode
4771 * Returns NFS_OK if recovery for this stateid is now finished.
4772 * Otherwise a negative NFS4ERR value is returned.
4774 static int nfs41_check_expired_locks(struct nfs4_state *state)
4776 int status, ret = -NFS4ERR_BAD_STATEID;
4777 struct nfs4_lock_state *lsp;
4778 struct nfs_server *server = NFS_SERVER(state->inode);
4780 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4781 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
4782 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4783 if (status != NFS_OK) {
4784 /* Free the stateid unless the server
4785 * informs us the stateid is unrecognized. */
4786 if (status != -NFS4ERR_BAD_STATEID)
4787 nfs41_free_stateid(server,
4789 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
4798 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4800 int status = NFS_OK;
4802 if (test_bit(LK_STATE_IN_USE, &state->flags))
4803 status = nfs41_check_expired_locks(state);
4804 if (status != NFS_OK)
4805 status = nfs4_lock_expired(state, request);
4810 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4812 struct nfs_inode *nfsi = NFS_I(state->inode);
4813 unsigned char fl_flags = request->fl_flags;
4814 int status = -ENOLCK;
4816 if ((fl_flags & FL_POSIX) &&
4817 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4819 /* Is this a delegated open? */
4820 status = nfs4_set_lock_state(state, request);
4823 request->fl_flags |= FL_ACCESS;
4824 status = do_vfs_lock(request->fl_file, request);
4827 down_read(&nfsi->rwsem);
4828 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4829 /* Yes: cache locks! */
4830 /* ...but avoid races with delegation recall... */
4831 request->fl_flags = fl_flags & ~FL_SLEEP;
4832 status = do_vfs_lock(request->fl_file, request);
4835 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4838 /* Note: we always want to sleep here! */
4839 request->fl_flags = fl_flags | FL_SLEEP;
4840 if (do_vfs_lock(request->fl_file, request) < 0)
4841 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4842 "manager!\n", __func__);
4844 up_read(&nfsi->rwsem);
4846 request->fl_flags = fl_flags;
4850 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4852 struct nfs4_exception exception = {
4854 .inode = state->inode,
4859 err = _nfs4_proc_setlk(state, cmd, request);
4860 if (err == -NFS4ERR_DENIED)
4862 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4864 } while (exception.retry);
4869 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4871 struct nfs_open_context *ctx;
4872 struct nfs4_state *state;
4873 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4876 /* verify open state */
4877 ctx = nfs_file_open_context(filp);
4880 if (request->fl_start < 0 || request->fl_end < 0)
4883 if (IS_GETLK(cmd)) {
4885 return nfs4_proc_getlk(state, F_GETLK, request);
4889 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4892 if (request->fl_type == F_UNLCK) {
4894 return nfs4_proc_unlck(state, cmd, request);
4901 * Don't rely on the VFS having checked the file open mode,
4902 * since it won't do this for flock() locks.
4904 switch (request->fl_type) {
4906 if (!(filp->f_mode & FMODE_READ))
4910 if (!(filp->f_mode & FMODE_WRITE))
4915 status = nfs4_proc_setlk(state, cmd, request);
4916 if ((status != -EAGAIN) || IS_SETLK(cmd))
4918 timeout = nfs4_set_lock_task_retry(timeout);
4919 status = -ERESTARTSYS;
4922 } while(status < 0);
4926 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4928 struct nfs_server *server = NFS_SERVER(state->inode);
4929 struct nfs4_exception exception = { };
4932 err = nfs4_set_lock_state(state, fl);
4936 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4939 printk(KERN_ERR "NFS: %s: unhandled error "
4940 "%d.\n", __func__, err);
4944 case -NFS4ERR_EXPIRED:
4945 nfs4_schedule_stateid_recovery(server, state);
4946 case -NFS4ERR_STALE_CLIENTID:
4947 case -NFS4ERR_STALE_STATEID:
4948 nfs4_schedule_lease_recovery(server->nfs_client);
4950 case -NFS4ERR_BADSESSION:
4951 case -NFS4ERR_BADSLOT:
4952 case -NFS4ERR_BAD_HIGH_SLOT:
4953 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4954 case -NFS4ERR_DEADSESSION:
4955 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
4959 * The show must go on: exit, but mark the
4960 * stateid as needing recovery.
4962 case -NFS4ERR_DELEG_REVOKED:
4963 case -NFS4ERR_ADMIN_REVOKED:
4964 case -NFS4ERR_BAD_STATEID:
4965 case -NFS4ERR_OPENMODE:
4966 nfs4_schedule_stateid_recovery(server, state);
4970 case -NFS4ERR_DENIED:
4971 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4974 case -NFS4ERR_DELAY:
4977 err = nfs4_handle_exception(server, err, &exception);
4978 } while (exception.retry);
4983 struct nfs_release_lockowner_data {
4984 struct nfs4_lock_state *lsp;
4985 struct nfs_server *server;
4986 struct nfs_release_lockowner_args args;
4989 static void nfs4_release_lockowner_release(void *calldata)
4991 struct nfs_release_lockowner_data *data = calldata;
4992 nfs4_free_lock_state(data->server, data->lsp);
4996 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
4997 .rpc_release = nfs4_release_lockowner_release,
5000 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
5002 struct nfs_server *server = lsp->ls_state->owner->so_server;
5003 struct nfs_release_lockowner_data *data;
5004 struct rpc_message msg = {
5005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5008 if (server->nfs_client->cl_mvops->minor_version != 0)
5010 data = kmalloc(sizeof(*data), GFP_NOFS);
5014 data->server = server;
5015 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5016 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5017 data->args.lock_owner.s_dev = server->s_dev;
5018 msg.rpc_argp = &data->args;
5019 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5023 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5025 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5026 const void *buf, size_t buflen,
5027 int flags, int type)
5029 if (strcmp(key, "") != 0)
5032 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5035 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5036 void *buf, size_t buflen, int type)
5038 if (strcmp(key, "") != 0)
5041 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5044 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5045 size_t list_len, const char *name,
5046 size_t name_len, int type)
5048 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5050 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5053 if (list && len <= list_len)
5054 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5059 * nfs_fhget will use either the mounted_on_fileid or the fileid
5061 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5063 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5064 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5065 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5066 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5069 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5070 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5071 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5075 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5076 const struct qstr *name,
5077 struct nfs4_fs_locations *fs_locations,
5080 struct nfs_server *server = NFS_SERVER(dir);
5082 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5084 struct nfs4_fs_locations_arg args = {
5085 .dir_fh = NFS_FH(dir),
5090 struct nfs4_fs_locations_res res = {
5091 .fs_locations = fs_locations,
5093 struct rpc_message msg = {
5094 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5100 dprintk("%s: start\n", __func__);
5102 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5103 * is not supported */
5104 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5105 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5107 bitmask[0] |= FATTR4_WORD0_FILEID;
5109 nfs_fattr_init(&fs_locations->fattr);
5110 fs_locations->server = server;
5111 fs_locations->nlocations = 0;
5112 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5113 dprintk("%s: returned status = %d\n", __func__, status);
5117 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5118 const struct qstr *name,
5119 struct nfs4_fs_locations *fs_locations,
5122 struct nfs4_exception exception = { };
5125 err = nfs4_handle_exception(NFS_SERVER(dir),
5126 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5128 } while (exception.retry);
5132 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5135 struct nfs4_secinfo_arg args = {
5136 .dir_fh = NFS_FH(dir),
5139 struct nfs4_secinfo_res res = {
5142 struct rpc_message msg = {
5143 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5148 dprintk("NFS call secinfo %s\n", name->name);
5149 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5150 dprintk("NFS reply secinfo: %d\n", status);
5154 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5155 struct nfs4_secinfo_flavors *flavors)
5157 struct nfs4_exception exception = { };
5160 err = nfs4_handle_exception(NFS_SERVER(dir),
5161 _nfs4_proc_secinfo(dir, name, flavors),
5163 } while (exception.retry);
5167 #ifdef CONFIG_NFS_V4_1
5169 * Check the exchange flags returned by the server for invalid flags, having
5170 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5173 static int nfs4_check_cl_exchange_flags(u32 flags)
5175 if (flags & ~EXCHGID4_FLAG_MASK_R)
5177 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5178 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5180 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5184 return -NFS4ERR_INVAL;
5188 nfs41_same_server_scope(struct nfs41_server_scope *a,
5189 struct nfs41_server_scope *b)
5191 if (a->server_scope_sz == b->server_scope_sz &&
5192 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5199 * nfs4_proc_bind_conn_to_session()
5201 * The 4.1 client currently uses the same TCP connection for the
5202 * fore and backchannel.
5204 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5207 struct nfs41_bind_conn_to_session_res res;
5208 struct rpc_message msg = {
5210 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5216 dprintk("--> %s\n", __func__);
5218 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5219 if (unlikely(res.session == NULL)) {
5224 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5226 if (memcmp(res.session->sess_id.data,
5227 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5228 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5232 if (res.dir != NFS4_CDFS4_BOTH) {
5233 dprintk("NFS: %s: Unexpected direction from server\n",
5238 if (res.use_conn_in_rdma_mode) {
5239 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5248 dprintk("<-- %s status= %d\n", __func__, status);
5253 * nfs4_proc_exchange_id()
5255 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5257 * Since the clientid has expired, all compounds using sessions
5258 * associated with the stale clientid will be returning
5259 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5260 * be in some phase of session reset.
5262 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5264 nfs4_verifier verifier;
5265 struct nfs41_exchange_id_args args = {
5266 .verifier = &verifier,
5268 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5270 struct nfs41_exchange_id_res res = {
5274 struct rpc_message msg = {
5275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5281 nfs4_init_boot_verifier(clp, &verifier);
5282 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5284 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5285 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5286 args.id_len, args.id);
5288 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5290 if (unlikely(res.server_owner == NULL)) {
5295 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5297 if (unlikely(res.server_scope == NULL)) {
5299 goto out_server_owner;
5302 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5303 if (unlikely(res.impl_id == NULL)) {
5305 goto out_server_scope;
5308 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5310 status = nfs4_check_cl_exchange_flags(res.flags);
5313 clp->cl_clientid = res.clientid;
5314 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5315 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5316 clp->cl_seqid = res.seqid;
5318 kfree(clp->cl_serverowner);
5319 clp->cl_serverowner = res.server_owner;
5320 res.server_owner = NULL;
5322 /* use the most recent implementation id */
5323 kfree(clp->cl_implid);
5324 clp->cl_implid = res.impl_id;
5326 if (clp->cl_serverscope != NULL &&
5327 !nfs41_same_server_scope(clp->cl_serverscope,
5328 res.server_scope)) {
5329 dprintk("%s: server_scope mismatch detected\n",
5331 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5332 kfree(clp->cl_serverscope);
5333 clp->cl_serverscope = NULL;
5336 if (clp->cl_serverscope == NULL) {
5337 clp->cl_serverscope = res.server_scope;
5344 kfree(res.server_owner);
5346 kfree(res.server_scope);
5348 if (clp->cl_implid != NULL)
5349 dprintk("NFS reply exchange_id: Server Implementation ID: "
5350 "domain: %s, name: %s, date: %llu,%u\n",
5351 clp->cl_implid->domain, clp->cl_implid->name,
5352 clp->cl_implid->date.seconds,
5353 clp->cl_implid->date.nseconds);
5354 dprintk("NFS reply exchange_id: %d\n", status);
5358 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5359 struct rpc_cred *cred)
5361 struct rpc_message msg = {
5362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5368 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5370 dprintk("NFS: Got error %d from the server %s on "
5371 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5375 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5376 struct rpc_cred *cred)
5381 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5382 ret = _nfs4_proc_destroy_clientid(clp, cred);
5384 case -NFS4ERR_DELAY:
5385 case -NFS4ERR_CLIENTID_BUSY:
5395 int nfs4_destroy_clientid(struct nfs_client *clp)
5397 struct rpc_cred *cred;
5400 if (clp->cl_mvops->minor_version < 1)
5402 if (clp->cl_exchange_flags == 0)
5404 if (clp->cl_preserve_clid)
5406 cred = nfs4_get_exchange_id_cred(clp);
5407 ret = nfs4_proc_destroy_clientid(clp, cred);
5412 case -NFS4ERR_STALE_CLIENTID:
5413 clp->cl_exchange_flags = 0;
5419 struct nfs4_get_lease_time_data {
5420 struct nfs4_get_lease_time_args *args;
5421 struct nfs4_get_lease_time_res *res;
5422 struct nfs_client *clp;
5425 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5428 struct nfs4_get_lease_time_data *data =
5429 (struct nfs4_get_lease_time_data *)calldata;
5431 dprintk("--> %s\n", __func__);
5432 /* just setup sequence, do not trigger session recovery
5433 since we're invoked within one */
5434 nfs41_setup_sequence(data->clp->cl_session,
5435 &data->args->la_seq_args,
5436 &data->res->lr_seq_res,
5438 dprintk("<-- %s\n", __func__);
5442 * Called from nfs4_state_manager thread for session setup, so don't recover
5443 * from sequence operation or clientid errors.
5445 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5447 struct nfs4_get_lease_time_data *data =
5448 (struct nfs4_get_lease_time_data *)calldata;
5450 dprintk("--> %s\n", __func__);
5451 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5453 switch (task->tk_status) {
5454 case -NFS4ERR_DELAY:
5455 case -NFS4ERR_GRACE:
5456 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5457 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5458 task->tk_status = 0;
5460 case -NFS4ERR_RETRY_UNCACHED_REP:
5461 rpc_restart_call_prepare(task);
5464 dprintk("<-- %s\n", __func__);
5467 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5468 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5469 .rpc_call_done = nfs4_get_lease_time_done,
5472 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5474 struct rpc_task *task;
5475 struct nfs4_get_lease_time_args args;
5476 struct nfs4_get_lease_time_res res = {
5477 .lr_fsinfo = fsinfo,
5479 struct nfs4_get_lease_time_data data = {
5484 struct rpc_message msg = {
5485 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5489 struct rpc_task_setup task_setup = {
5490 .rpc_client = clp->cl_rpcclient,
5491 .rpc_message = &msg,
5492 .callback_ops = &nfs4_get_lease_time_ops,
5493 .callback_data = &data,
5494 .flags = RPC_TASK_TIMEOUT,
5498 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5499 nfs4_set_sequence_privileged(&args.la_seq_args);
5500 dprintk("--> %s\n", __func__);
5501 task = rpc_run_task(&task_setup);
5504 status = PTR_ERR(task);
5506 status = task->tk_status;
5509 dprintk("<-- %s return %d\n", __func__, status);
5515 * Initialize the values to be used by the client in CREATE_SESSION
5516 * If nfs4_init_session set the fore channel request and response sizes,
5519 * Set the back channel max_resp_sz_cached to zero to force the client to
5520 * always set csa_cachethis to FALSE because the current implementation
5521 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5523 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5525 struct nfs4_session *session = args->client->cl_session;
5526 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5527 mxresp_sz = session->fc_target_max_resp_sz;
5530 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5532 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5533 /* Fore channel attributes */
5534 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5535 args->fc_attrs.max_resp_sz = mxresp_sz;
5536 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5537 args->fc_attrs.max_reqs = max_session_slots;
5539 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5540 "max_ops=%u max_reqs=%u\n",
5542 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5543 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5545 /* Back channel attributes */
5546 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5547 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5548 args->bc_attrs.max_resp_sz_cached = 0;
5549 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5550 args->bc_attrs.max_reqs = 1;
5552 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5553 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5555 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5556 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5557 args->bc_attrs.max_reqs);
5560 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5562 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5563 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5565 if (rcvd->max_resp_sz > sent->max_resp_sz)
5568 * Our requested max_ops is the minimum we need; we're not
5569 * prepared to break up compounds into smaller pieces than that.
5570 * So, no point even trying to continue if the server won't
5573 if (rcvd->max_ops < sent->max_ops)
5575 if (rcvd->max_reqs == 0)
5577 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5578 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5582 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5584 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5585 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5587 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5589 if (rcvd->max_resp_sz < sent->max_resp_sz)
5591 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5593 /* These would render the backchannel useless: */
5594 if (rcvd->max_ops != sent->max_ops)
5596 if (rcvd->max_reqs != sent->max_reqs)
5601 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5602 struct nfs4_session *session)
5606 ret = nfs4_verify_fore_channel_attrs(args, session);
5609 return nfs4_verify_back_channel_attrs(args, session);
5612 static int _nfs4_proc_create_session(struct nfs_client *clp,
5613 struct rpc_cred *cred)
5615 struct nfs4_session *session = clp->cl_session;
5616 struct nfs41_create_session_args args = {
5618 .cb_program = NFS4_CALLBACK,
5620 struct nfs41_create_session_res res = {
5623 struct rpc_message msg = {
5624 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5631 nfs4_init_channel_attrs(&args);
5632 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5634 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5637 /* Verify the session's negotiated channel_attrs values */
5638 status = nfs4_verify_channel_attrs(&args, session);
5639 /* Increment the clientid slot sequence id */
5647 * Issues a CREATE_SESSION operation to the server.
5648 * It is the responsibility of the caller to verify the session is
5649 * expired before calling this routine.
5651 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5655 struct nfs4_session *session = clp->cl_session;
5657 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5659 status = _nfs4_proc_create_session(clp, cred);
5663 /* Init or reset the session slot tables */
5664 status = nfs4_setup_session_slot_tables(session);
5665 dprintk("slot table setup returned %d\n", status);
5669 ptr = (unsigned *)&session->sess_id.data[0];
5670 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5671 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5673 dprintk("<-- %s\n", __func__);
5678 * Issue the over-the-wire RPC DESTROY_SESSION.
5679 * The caller must serialize access to this routine.
5681 int nfs4_proc_destroy_session(struct nfs4_session *session,
5682 struct rpc_cred *cred)
5684 struct rpc_message msg = {
5685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5686 .rpc_argp = session,
5691 dprintk("--> nfs4_proc_destroy_session\n");
5693 /* session is still being setup */
5694 if (session->clp->cl_cons_state != NFS_CS_READY)
5697 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5700 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
5701 "Session has been destroyed regardless...\n", status);
5703 dprintk("<-- nfs4_proc_destroy_session\n");
5708 * Renew the cl_session lease.
5710 struct nfs4_sequence_data {
5711 struct nfs_client *clp;
5712 struct nfs4_sequence_args args;
5713 struct nfs4_sequence_res res;
5716 static void nfs41_sequence_release(void *data)
5718 struct nfs4_sequence_data *calldata = data;
5719 struct nfs_client *clp = calldata->clp;
5721 if (atomic_read(&clp->cl_count) > 1)
5722 nfs4_schedule_state_renewal(clp);
5723 nfs_put_client(clp);
5727 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5729 switch(task->tk_status) {
5730 case -NFS4ERR_DELAY:
5731 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5734 nfs4_schedule_lease_recovery(clp);
5739 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5741 struct nfs4_sequence_data *calldata = data;
5742 struct nfs_client *clp = calldata->clp;
5744 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5747 if (task->tk_status < 0) {
5748 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5749 if (atomic_read(&clp->cl_count) == 1)
5752 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5753 rpc_restart_call_prepare(task);
5757 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5759 dprintk("<-- %s\n", __func__);
5762 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5764 struct nfs4_sequence_data *calldata = data;
5765 struct nfs_client *clp = calldata->clp;
5766 struct nfs4_sequence_args *args;
5767 struct nfs4_sequence_res *res;
5769 args = task->tk_msg.rpc_argp;
5770 res = task->tk_msg.rpc_resp;
5772 nfs41_setup_sequence(clp->cl_session, args, res, task);
5775 static const struct rpc_call_ops nfs41_sequence_ops = {
5776 .rpc_call_done = nfs41_sequence_call_done,
5777 .rpc_call_prepare = nfs41_sequence_prepare,
5778 .rpc_release = nfs41_sequence_release,
5781 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5782 struct rpc_cred *cred,
5785 struct nfs4_sequence_data *calldata;
5786 struct rpc_message msg = {
5787 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5790 struct rpc_task_setup task_setup_data = {
5791 .rpc_client = clp->cl_rpcclient,
5792 .rpc_message = &msg,
5793 .callback_ops = &nfs41_sequence_ops,
5794 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5797 if (!atomic_inc_not_zero(&clp->cl_count))
5798 return ERR_PTR(-EIO);
5799 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5800 if (calldata == NULL) {
5801 nfs_put_client(clp);
5802 return ERR_PTR(-ENOMEM);
5804 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5806 nfs4_set_sequence_privileged(&calldata->args);
5807 msg.rpc_argp = &calldata->args;
5808 msg.rpc_resp = &calldata->res;
5809 calldata->clp = clp;
5810 task_setup_data.callback_data = calldata;
5812 return rpc_run_task(&task_setup_data);
5815 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5817 struct rpc_task *task;
5820 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5822 task = _nfs41_proc_sequence(clp, cred, false);
5824 ret = PTR_ERR(task);
5826 rpc_put_task_async(task);
5827 dprintk("<-- %s status=%d\n", __func__, ret);
5831 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5833 struct rpc_task *task;
5836 task = _nfs41_proc_sequence(clp, cred, true);
5838 ret = PTR_ERR(task);
5841 ret = rpc_wait_for_completion_task(task);
5843 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5845 if (task->tk_status == 0)
5846 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5847 ret = task->tk_status;
5851 dprintk("<-- %s status=%d\n", __func__, ret);
5855 struct nfs4_reclaim_complete_data {
5856 struct nfs_client *clp;
5857 struct nfs41_reclaim_complete_args arg;
5858 struct nfs41_reclaim_complete_res res;
5861 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5863 struct nfs4_reclaim_complete_data *calldata = data;
5865 nfs41_setup_sequence(calldata->clp->cl_session,
5866 &calldata->arg.seq_args,
5867 &calldata->res.seq_res,
5871 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5873 switch(task->tk_status) {
5875 case -NFS4ERR_COMPLETE_ALREADY:
5876 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5878 case -NFS4ERR_DELAY:
5879 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5881 case -NFS4ERR_RETRY_UNCACHED_REP:
5884 nfs4_schedule_lease_recovery(clp);
5889 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5891 struct nfs4_reclaim_complete_data *calldata = data;
5892 struct nfs_client *clp = calldata->clp;
5893 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5895 dprintk("--> %s\n", __func__);
5896 if (!nfs41_sequence_done(task, res))
5899 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5900 rpc_restart_call_prepare(task);
5903 dprintk("<-- %s\n", __func__);
5906 static void nfs4_free_reclaim_complete_data(void *data)
5908 struct nfs4_reclaim_complete_data *calldata = data;
5913 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5914 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5915 .rpc_call_done = nfs4_reclaim_complete_done,
5916 .rpc_release = nfs4_free_reclaim_complete_data,
5920 * Issue a global reclaim complete.
5922 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5924 struct nfs4_reclaim_complete_data *calldata;
5925 struct rpc_task *task;
5926 struct rpc_message msg = {
5927 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5929 struct rpc_task_setup task_setup_data = {
5930 .rpc_client = clp->cl_rpcclient,
5931 .rpc_message = &msg,
5932 .callback_ops = &nfs4_reclaim_complete_call_ops,
5933 .flags = RPC_TASK_ASYNC,
5935 int status = -ENOMEM;
5937 dprintk("--> %s\n", __func__);
5938 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5939 if (calldata == NULL)
5941 calldata->clp = clp;
5942 calldata->arg.one_fs = 0;
5944 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
5945 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
5946 msg.rpc_argp = &calldata->arg;
5947 msg.rpc_resp = &calldata->res;
5948 task_setup_data.callback_data = calldata;
5949 task = rpc_run_task(&task_setup_data);
5951 status = PTR_ERR(task);
5954 status = nfs4_wait_for_completion_rpc_task(task);
5956 status = task->tk_status;
5960 dprintk("<-- %s status=%d\n", __func__, status);
5965 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5967 struct nfs4_layoutget *lgp = calldata;
5968 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5969 struct nfs4_session *session = nfs4_get_session(server);
5971 dprintk("--> %s\n", __func__);
5972 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5973 * right now covering the LAYOUTGET we are about to send.
5974 * However, that is not so catastrophic, and there seems
5975 * to be no way to prevent it completely.
5977 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
5978 &lgp->res.seq_res, task))
5980 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5981 NFS_I(lgp->args.inode)->layout,
5982 lgp->args.ctx->state)) {
5983 rpc_exit(task, NFS4_OK);
5987 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5989 struct nfs4_layoutget *lgp = calldata;
5990 struct inode *inode = lgp->args.inode;
5991 struct nfs_server *server = NFS_SERVER(inode);
5992 struct pnfs_layout_hdr *lo;
5993 struct nfs4_state *state = NULL;
5995 dprintk("--> %s\n", __func__);
5997 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
6000 switch (task->tk_status) {
6003 case -NFS4ERR_LAYOUTTRYLATER:
6004 case -NFS4ERR_RECALLCONFLICT:
6005 task->tk_status = -NFS4ERR_DELAY;
6007 case -NFS4ERR_EXPIRED:
6008 case -NFS4ERR_BAD_STATEID:
6009 spin_lock(&inode->i_lock);
6010 lo = NFS_I(inode)->layout;
6011 if (!lo || list_empty(&lo->plh_segs)) {
6012 spin_unlock(&inode->i_lock);
6013 /* If the open stateid was bad, then recover it. */
6014 state = lgp->args.ctx->state;
6018 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6019 spin_unlock(&inode->i_lock);
6020 /* Mark the bad layout state as invalid, then
6021 * retry using the open stateid. */
6022 pnfs_free_lseg_list(&head);
6025 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6026 rpc_restart_call_prepare(task);
6028 dprintk("<-- %s\n", __func__);
6031 static size_t max_response_pages(struct nfs_server *server)
6033 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6034 return nfs_page_array_len(0, max_resp_sz);
6037 static void nfs4_free_pages(struct page **pages, size_t size)
6044 for (i = 0; i < size; i++) {
6047 __free_page(pages[i]);
6052 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6054 struct page **pages;
6057 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6059 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6063 for (i = 0; i < size; i++) {
6064 pages[i] = alloc_page(gfp_flags);
6066 dprintk("%s: failed to allocate page\n", __func__);
6067 nfs4_free_pages(pages, size);
6075 static void nfs4_layoutget_release(void *calldata)
6077 struct nfs4_layoutget *lgp = calldata;
6078 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6079 size_t max_pages = max_response_pages(server);
6081 dprintk("--> %s\n", __func__);
6082 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6083 put_nfs_open_context(lgp->args.ctx);
6085 dprintk("<-- %s\n", __func__);
6088 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6089 .rpc_call_prepare = nfs4_layoutget_prepare,
6090 .rpc_call_done = nfs4_layoutget_done,
6091 .rpc_release = nfs4_layoutget_release,
6094 struct pnfs_layout_segment *
6095 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6097 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6098 size_t max_pages = max_response_pages(server);
6099 struct rpc_task *task;
6100 struct rpc_message msg = {
6101 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6102 .rpc_argp = &lgp->args,
6103 .rpc_resp = &lgp->res,
6105 struct rpc_task_setup task_setup_data = {
6106 .rpc_client = server->client,
6107 .rpc_message = &msg,
6108 .callback_ops = &nfs4_layoutget_call_ops,
6109 .callback_data = lgp,
6110 .flags = RPC_TASK_ASYNC,
6112 struct pnfs_layout_segment *lseg = NULL;
6115 dprintk("--> %s\n", __func__);
6117 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6118 if (!lgp->args.layout.pages) {
6119 nfs4_layoutget_release(lgp);
6120 return ERR_PTR(-ENOMEM);
6122 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6124 lgp->res.layoutp = &lgp->args.layout;
6125 lgp->res.seq_res.sr_slot = NULL;
6126 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6127 task = rpc_run_task(&task_setup_data);
6129 return ERR_CAST(task);
6130 status = nfs4_wait_for_completion_rpc_task(task);
6132 status = task->tk_status;
6134 lseg = pnfs_layout_process(lgp);
6136 dprintk("<-- %s status=%d\n", __func__, status);
6138 return ERR_PTR(status);
6143 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6145 struct nfs4_layoutreturn *lrp = calldata;
6147 dprintk("--> %s\n", __func__);
6148 nfs41_setup_sequence(lrp->clp->cl_session,
6149 &lrp->args.seq_args,
6154 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6156 struct nfs4_layoutreturn *lrp = calldata;
6157 struct nfs_server *server;
6159 dprintk("--> %s\n", __func__);
6161 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
6164 server = NFS_SERVER(lrp->args.inode);
6165 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6166 rpc_restart_call_prepare(task);
6169 dprintk("<-- %s\n", __func__);
6172 static void nfs4_layoutreturn_release(void *calldata)
6174 struct nfs4_layoutreturn *lrp = calldata;
6175 struct pnfs_layout_hdr *lo = lrp->args.layout;
6177 dprintk("--> %s\n", __func__);
6178 spin_lock(&lo->plh_inode->i_lock);
6179 if (lrp->res.lrs_present)
6180 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6181 lo->plh_block_lgets--;
6182 spin_unlock(&lo->plh_inode->i_lock);
6183 pnfs_put_layout_hdr(lrp->args.layout);
6185 dprintk("<-- %s\n", __func__);
6188 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6189 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6190 .rpc_call_done = nfs4_layoutreturn_done,
6191 .rpc_release = nfs4_layoutreturn_release,
6194 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6196 struct rpc_task *task;
6197 struct rpc_message msg = {
6198 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6199 .rpc_argp = &lrp->args,
6200 .rpc_resp = &lrp->res,
6202 struct rpc_task_setup task_setup_data = {
6203 .rpc_client = lrp->clp->cl_rpcclient,
6204 .rpc_message = &msg,
6205 .callback_ops = &nfs4_layoutreturn_call_ops,
6206 .callback_data = lrp,
6210 dprintk("--> %s\n", __func__);
6211 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6212 task = rpc_run_task(&task_setup_data);
6214 return PTR_ERR(task);
6215 status = task->tk_status;
6216 dprintk("<-- %s status=%d\n", __func__, status);
6222 * Retrieve the list of Data Server devices from the MDS.
6224 static int _nfs4_getdevicelist(struct nfs_server *server,
6225 const struct nfs_fh *fh,
6226 struct pnfs_devicelist *devlist)
6228 struct nfs4_getdevicelist_args args = {
6230 .layoutclass = server->pnfs_curr_ld->id,
6232 struct nfs4_getdevicelist_res res = {
6235 struct rpc_message msg = {
6236 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6242 dprintk("--> %s\n", __func__);
6243 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6245 dprintk("<-- %s status=%d\n", __func__, status);
6249 int nfs4_proc_getdevicelist(struct nfs_server *server,
6250 const struct nfs_fh *fh,
6251 struct pnfs_devicelist *devlist)
6253 struct nfs4_exception exception = { };
6257 err = nfs4_handle_exception(server,
6258 _nfs4_getdevicelist(server, fh, devlist),
6260 } while (exception.retry);
6262 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6263 err, devlist->num_devs);
6267 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6270 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6272 struct nfs4_getdeviceinfo_args args = {
6275 struct nfs4_getdeviceinfo_res res = {
6278 struct rpc_message msg = {
6279 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6285 dprintk("--> %s\n", __func__);
6286 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6287 dprintk("<-- %s status=%d\n", __func__, status);
6292 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6294 struct nfs4_exception exception = { };
6298 err = nfs4_handle_exception(server,
6299 _nfs4_proc_getdeviceinfo(server, pdev),
6301 } while (exception.retry);
6304 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6306 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6308 struct nfs4_layoutcommit_data *data = calldata;
6309 struct nfs_server *server = NFS_SERVER(data->args.inode);
6310 struct nfs4_session *session = nfs4_get_session(server);
6312 nfs41_setup_sequence(session,
6313 &data->args.seq_args,
6319 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6321 struct nfs4_layoutcommit_data *data = calldata;
6322 struct nfs_server *server = NFS_SERVER(data->args.inode);
6324 if (!nfs41_sequence_done(task, &data->res.seq_res))
6327 switch (task->tk_status) { /* Just ignore these failures */
6328 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6329 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6330 case -NFS4ERR_BADLAYOUT: /* no layout */
6331 case -NFS4ERR_GRACE: /* loca_recalim always false */
6332 task->tk_status = 0;
6335 nfs_post_op_update_inode_force_wcc(data->args.inode,
6339 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6340 rpc_restart_call_prepare(task);
6346 static void nfs4_layoutcommit_release(void *calldata)
6348 struct nfs4_layoutcommit_data *data = calldata;
6349 struct pnfs_layout_segment *lseg, *tmp;
6350 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6352 pnfs_cleanup_layoutcommit(data);
6353 /* Matched by references in pnfs_set_layoutcommit */
6354 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6355 list_del_init(&lseg->pls_lc_list);
6356 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6358 pnfs_put_lseg(lseg);
6361 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6362 smp_mb__after_clear_bit();
6363 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6365 put_rpccred(data->cred);
6369 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6370 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6371 .rpc_call_done = nfs4_layoutcommit_done,
6372 .rpc_release = nfs4_layoutcommit_release,
6376 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6378 struct rpc_message msg = {
6379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6380 .rpc_argp = &data->args,
6381 .rpc_resp = &data->res,
6382 .rpc_cred = data->cred,
6384 struct rpc_task_setup task_setup_data = {
6385 .task = &data->task,
6386 .rpc_client = NFS_CLIENT(data->args.inode),
6387 .rpc_message = &msg,
6388 .callback_ops = &nfs4_layoutcommit_ops,
6389 .callback_data = data,
6390 .flags = RPC_TASK_ASYNC,
6392 struct rpc_task *task;
6395 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6396 "lbw: %llu inode %lu\n",
6397 data->task.tk_pid, sync,
6398 data->args.lastbytewritten,
6399 data->args.inode->i_ino);
6401 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6402 task = rpc_run_task(&task_setup_data);
6404 return PTR_ERR(task);
6407 status = nfs4_wait_for_completion_rpc_task(task);
6410 status = task->tk_status;
6412 dprintk("%s: status %d\n", __func__, status);
6418 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6419 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6421 struct nfs41_secinfo_no_name_args args = {
6422 .style = SECINFO_STYLE_CURRENT_FH,
6424 struct nfs4_secinfo_res res = {
6427 struct rpc_message msg = {
6428 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6432 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6436 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6437 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6439 struct nfs4_exception exception = { };
6442 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6445 case -NFS4ERR_WRONGSEC:
6446 case -NFS4ERR_NOTSUPP:
6449 err = nfs4_handle_exception(server, err, &exception);
6451 } while (exception.retry);
6457 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6458 struct nfs_fsinfo *info)
6462 rpc_authflavor_t flavor;
6463 struct nfs4_secinfo_flavors *flavors;
6465 page = alloc_page(GFP_KERNEL);
6471 flavors = page_address(page);
6472 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6475 * Fall back on "guess and check" method if
6476 * the server doesn't support SECINFO_NO_NAME
6478 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6479 err = nfs4_find_root_sec(server, fhandle, info);
6485 flavor = nfs_find_best_sec(flavors);
6487 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6497 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6500 struct nfs41_test_stateid_args args = {
6503 struct nfs41_test_stateid_res res;
6504 struct rpc_message msg = {
6505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6510 dprintk("NFS call test_stateid %p\n", stateid);
6511 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6512 nfs4_set_sequence_privileged(&args.seq_args);
6513 status = nfs4_call_sync_sequence(server->client, server, &msg,
6514 &args.seq_args, &res.seq_res);
6515 if (status != NFS_OK) {
6516 dprintk("NFS reply test_stateid: failed, %d\n", status);
6519 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
6524 * nfs41_test_stateid - perform a TEST_STATEID operation
6526 * @server: server / transport on which to perform the operation
6527 * @stateid: state ID to test
6529 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6530 * Otherwise a negative NFS4ERR value is returned if the operation
6531 * failed or the state ID is not currently valid.
6533 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6535 struct nfs4_exception exception = { };
6538 err = _nfs41_test_stateid(server, stateid);
6539 if (err != -NFS4ERR_DELAY)
6541 nfs4_handle_exception(server, err, &exception);
6542 } while (exception.retry);
6546 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6548 struct nfs41_free_stateid_args args = {
6551 struct nfs41_free_stateid_res res;
6552 struct rpc_message msg = {
6553 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6559 dprintk("NFS call free_stateid %p\n", stateid);
6560 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6561 nfs4_set_sequence_privileged(&args.seq_args);
6562 status = nfs4_call_sync_sequence(server->client, server, &msg,
6563 &args.seq_args, &res.seq_res);
6564 dprintk("NFS reply free_stateid: %d\n", status);
6569 * nfs41_free_stateid - perform a FREE_STATEID operation
6571 * @server: server / transport on which to perform the operation
6572 * @stateid: state ID to release
6574 * Returns NFS_OK if the server freed "stateid". Otherwise a
6575 * negative NFS4ERR value is returned.
6577 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6579 struct nfs4_exception exception = { };
6582 err = _nfs4_free_stateid(server, stateid);
6583 if (err != -NFS4ERR_DELAY)
6585 nfs4_handle_exception(server, err, &exception);
6586 } while (exception.retry);
6590 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6591 const nfs4_stateid *s2)
6593 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6596 if (s1->seqid == s2->seqid)
6598 if (s1->seqid == 0 || s2->seqid == 0)
6604 #endif /* CONFIG_NFS_V4_1 */
6606 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6607 const nfs4_stateid *s2)
6609 return nfs4_stateid_match(s1, s2);
6613 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6614 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6615 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6616 .recover_open = nfs4_open_reclaim,
6617 .recover_lock = nfs4_lock_reclaim,
6618 .establish_clid = nfs4_init_clientid,
6619 .get_clid_cred = nfs4_get_setclientid_cred,
6620 .detect_trunking = nfs40_discover_server_trunking,
6623 #if defined(CONFIG_NFS_V4_1)
6624 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6625 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6626 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6627 .recover_open = nfs4_open_reclaim,
6628 .recover_lock = nfs4_lock_reclaim,
6629 .establish_clid = nfs41_init_clientid,
6630 .get_clid_cred = nfs4_get_exchange_id_cred,
6631 .reclaim_complete = nfs41_proc_reclaim_complete,
6632 .detect_trunking = nfs41_discover_server_trunking,
6634 #endif /* CONFIG_NFS_V4_1 */
6636 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6637 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6638 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6639 .recover_open = nfs4_open_expired,
6640 .recover_lock = nfs4_lock_expired,
6641 .establish_clid = nfs4_init_clientid,
6642 .get_clid_cred = nfs4_get_setclientid_cred,
6645 #if defined(CONFIG_NFS_V4_1)
6646 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6647 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6648 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6649 .recover_open = nfs41_open_expired,
6650 .recover_lock = nfs41_lock_expired,
6651 .establish_clid = nfs41_init_clientid,
6652 .get_clid_cred = nfs4_get_exchange_id_cred,
6654 #endif /* CONFIG_NFS_V4_1 */
6656 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6657 .sched_state_renewal = nfs4_proc_async_renew,
6658 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6659 .renew_lease = nfs4_proc_renew,
6662 #if defined(CONFIG_NFS_V4_1)
6663 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6664 .sched_state_renewal = nfs41_proc_async_sequence,
6665 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6666 .renew_lease = nfs4_proc_sequence,
6670 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6672 .call_sync = _nfs4_call_sync,
6673 .match_stateid = nfs4_match_stateid,
6674 .find_root_sec = nfs4_find_root_sec,
6675 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6676 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6677 .state_renewal_ops = &nfs40_state_renewal_ops,
6680 #if defined(CONFIG_NFS_V4_1)
6681 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6683 .call_sync = nfs4_call_sync_sequence,
6684 .match_stateid = nfs41_match_stateid,
6685 .find_root_sec = nfs41_find_root_sec,
6686 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6687 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6688 .state_renewal_ops = &nfs41_state_renewal_ops,
6692 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6693 [0] = &nfs_v4_0_minor_ops,
6694 #if defined(CONFIG_NFS_V4_1)
6695 [1] = &nfs_v4_1_minor_ops,
6699 const struct inode_operations nfs4_dir_inode_operations = {
6700 .create = nfs_create,
6701 .lookup = nfs_lookup,
6702 .atomic_open = nfs_atomic_open,
6704 .unlink = nfs_unlink,
6705 .symlink = nfs_symlink,
6709 .rename = nfs_rename,
6710 .permission = nfs_permission,
6711 .getattr = nfs_getattr,
6712 .setattr = nfs_setattr,
6713 .getxattr = generic_getxattr,
6714 .setxattr = generic_setxattr,
6715 .listxattr = generic_listxattr,
6716 .removexattr = generic_removexattr,
6719 static const struct inode_operations nfs4_file_inode_operations = {
6720 .permission = nfs_permission,
6721 .getattr = nfs_getattr,
6722 .setattr = nfs_setattr,
6723 .getxattr = generic_getxattr,
6724 .setxattr = generic_setxattr,
6725 .listxattr = generic_listxattr,
6726 .removexattr = generic_removexattr,
6729 const struct nfs_rpc_ops nfs_v4_clientops = {
6730 .version = 4, /* protocol version */
6731 .dentry_ops = &nfs4_dentry_operations,
6732 .dir_inode_ops = &nfs4_dir_inode_operations,
6733 .file_inode_ops = &nfs4_file_inode_operations,
6734 .file_ops = &nfs4_file_operations,
6735 .getroot = nfs4_proc_get_root,
6736 .submount = nfs4_submount,
6737 .try_mount = nfs4_try_mount,
6738 .getattr = nfs4_proc_getattr,
6739 .setattr = nfs4_proc_setattr,
6740 .lookup = nfs4_proc_lookup,
6741 .access = nfs4_proc_access,
6742 .readlink = nfs4_proc_readlink,
6743 .create = nfs4_proc_create,
6744 .remove = nfs4_proc_remove,
6745 .unlink_setup = nfs4_proc_unlink_setup,
6746 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
6747 .unlink_done = nfs4_proc_unlink_done,
6748 .rename = nfs4_proc_rename,
6749 .rename_setup = nfs4_proc_rename_setup,
6750 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
6751 .rename_done = nfs4_proc_rename_done,
6752 .link = nfs4_proc_link,
6753 .symlink = nfs4_proc_symlink,
6754 .mkdir = nfs4_proc_mkdir,
6755 .rmdir = nfs4_proc_remove,
6756 .readdir = nfs4_proc_readdir,
6757 .mknod = nfs4_proc_mknod,
6758 .statfs = nfs4_proc_statfs,
6759 .fsinfo = nfs4_proc_fsinfo,
6760 .pathconf = nfs4_proc_pathconf,
6761 .set_capabilities = nfs4_server_capabilities,
6762 .decode_dirent = nfs4_decode_dirent,
6763 .read_setup = nfs4_proc_read_setup,
6764 .read_pageio_init = pnfs_pageio_init_read,
6765 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
6766 .read_done = nfs4_read_done,
6767 .write_setup = nfs4_proc_write_setup,
6768 .write_pageio_init = pnfs_pageio_init_write,
6769 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6770 .write_done = nfs4_write_done,
6771 .commit_setup = nfs4_proc_commit_setup,
6772 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
6773 .commit_done = nfs4_commit_done,
6774 .lock = nfs4_proc_lock,
6775 .clear_acl_cache = nfs4_zap_acl_attr,
6776 .close_context = nfs4_close_context,
6777 .open_context = nfs4_atomic_open,
6778 .have_delegation = nfs4_have_delegation,
6779 .return_delegation = nfs4_inode_return_delegation,
6780 .alloc_client = nfs4_alloc_client,
6781 .init_client = nfs4_init_client,
6782 .free_client = nfs4_free_client,
6783 .create_server = nfs4_create_server,
6784 .clone_server = nfs_clone_server,
6787 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6788 .prefix = XATTR_NAME_NFSV4_ACL,
6789 .list = nfs4_xattr_list_nfs4_acl,
6790 .get = nfs4_xattr_get_nfs4_acl,
6791 .set = nfs4_xattr_set_nfs4_acl,
6794 const struct xattr_handler *nfs4_xattr_handlers[] = {
6795 &nfs4_xattr_nfs4_acl_handler,