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:
96 case -NFS4ERR_LAYOUTTRYLATER:
97 case -NFS4ERR_RECALLCONFLICT:
99 case -NFS4ERR_WRONGSEC:
101 case -NFS4ERR_BADOWNER:
102 case -NFS4ERR_BADNAME:
104 case -NFS4ERR_SHARE_DENIED:
106 case -NFS4ERR_MINOR_VERS_MISMATCH:
107 return -EPROTONOSUPPORT;
108 case -NFS4ERR_ACCESS:
111 dprintk("%s could not handle NFSv4 error %d\n",
119 * This is our standard bitmap for GETATTR requests.
121 const u32 nfs4_fattr_bitmap[3] = {
123 | FATTR4_WORD0_CHANGE
126 | FATTR4_WORD0_FILEID,
128 | FATTR4_WORD1_NUMLINKS
130 | FATTR4_WORD1_OWNER_GROUP
131 | FATTR4_WORD1_RAWDEV
132 | FATTR4_WORD1_SPACE_USED
133 | FATTR4_WORD1_TIME_ACCESS
134 | FATTR4_WORD1_TIME_METADATA
135 | FATTR4_WORD1_TIME_MODIFY
138 static const u32 nfs4_pnfs_open_bitmap[3] = {
140 | FATTR4_WORD0_CHANGE
143 | FATTR4_WORD0_FILEID,
145 | FATTR4_WORD1_NUMLINKS
147 | FATTR4_WORD1_OWNER_GROUP
148 | FATTR4_WORD1_RAWDEV
149 | FATTR4_WORD1_SPACE_USED
150 | FATTR4_WORD1_TIME_ACCESS
151 | FATTR4_WORD1_TIME_METADATA
152 | FATTR4_WORD1_TIME_MODIFY,
153 FATTR4_WORD2_MDSTHRESHOLD
156 static const u32 nfs4_open_noattr_bitmap[3] = {
158 | FATTR4_WORD0_CHANGE
159 | FATTR4_WORD0_FILEID,
162 const u32 nfs4_statfs_bitmap[2] = {
163 FATTR4_WORD0_FILES_AVAIL
164 | FATTR4_WORD0_FILES_FREE
165 | FATTR4_WORD0_FILES_TOTAL,
166 FATTR4_WORD1_SPACE_AVAIL
167 | FATTR4_WORD1_SPACE_FREE
168 | FATTR4_WORD1_SPACE_TOTAL
171 const u32 nfs4_pathconf_bitmap[2] = {
173 | FATTR4_WORD0_MAXNAME,
177 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
178 | FATTR4_WORD0_MAXREAD
179 | FATTR4_WORD0_MAXWRITE
180 | FATTR4_WORD0_LEASE_TIME,
181 FATTR4_WORD1_TIME_DELTA
182 | FATTR4_WORD1_FS_LAYOUT_TYPES,
183 FATTR4_WORD2_LAYOUT_BLKSIZE
186 const u32 nfs4_fs_locations_bitmap[2] = {
188 | FATTR4_WORD0_CHANGE
191 | FATTR4_WORD0_FILEID
192 | FATTR4_WORD0_FS_LOCATIONS,
194 | FATTR4_WORD1_NUMLINKS
196 | FATTR4_WORD1_OWNER_GROUP
197 | FATTR4_WORD1_RAWDEV
198 | FATTR4_WORD1_SPACE_USED
199 | FATTR4_WORD1_TIME_ACCESS
200 | FATTR4_WORD1_TIME_METADATA
201 | FATTR4_WORD1_TIME_MODIFY
202 | FATTR4_WORD1_MOUNTED_ON_FILEID
205 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
206 struct nfs4_readdir_arg *readdir)
211 readdir->cookie = cookie;
212 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
217 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
222 * NFSv4 servers do not return entries for '.' and '..'
223 * Therefore, we fake these entries here. We let '.'
224 * have cookie 0 and '..' have cookie 1. Note that
225 * when talking to the server, we always send cookie 0
228 start = p = kmap_atomic(*readdir->pages);
231 *p++ = xdr_one; /* next */
232 *p++ = xdr_zero; /* cookie, first word */
233 *p++ = xdr_one; /* cookie, second word */
234 *p++ = xdr_one; /* entry len */
235 memcpy(p, ".\0\0\0", 4); /* entry */
237 *p++ = xdr_one; /* bitmap length */
238 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
239 *p++ = htonl(8); /* attribute buffer length */
240 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
243 *p++ = xdr_one; /* next */
244 *p++ = xdr_zero; /* cookie, first word */
245 *p++ = xdr_two; /* cookie, second word */
246 *p++ = xdr_two; /* entry len */
247 memcpy(p, "..\0\0", 4); /* entry */
249 *p++ = xdr_one; /* bitmap length */
250 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
251 *p++ = htonl(8); /* attribute buffer length */
252 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
254 readdir->pgbase = (char *)p - (char *)start;
255 readdir->count -= readdir->pgbase;
256 kunmap_atomic(start);
259 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
266 *timeout = NFS4_POLL_RETRY_MIN;
267 if (*timeout > NFS4_POLL_RETRY_MAX)
268 *timeout = NFS4_POLL_RETRY_MAX;
269 freezable_schedule_timeout_killable(*timeout);
270 if (fatal_signal_pending(current))
276 /* This is the error handling routine for processes that are allowed
279 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
281 struct nfs_client *clp = server->nfs_client;
282 struct nfs4_state *state = exception->state;
283 struct inode *inode = exception->inode;
286 exception->retry = 0;
290 case -NFS4ERR_OPENMODE:
291 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
292 nfs4_inode_return_delegation(inode);
293 exception->retry = 1;
298 ret = nfs4_schedule_stateid_recovery(server, state);
301 goto wait_on_recovery;
302 case -NFS4ERR_DELEG_REVOKED:
303 case -NFS4ERR_ADMIN_REVOKED:
304 case -NFS4ERR_BAD_STATEID:
307 nfs_remove_bad_delegation(state->inode);
308 ret = nfs4_schedule_stateid_recovery(server, state);
311 goto wait_on_recovery;
312 case -NFS4ERR_EXPIRED:
314 ret = nfs4_schedule_stateid_recovery(server, state);
318 case -NFS4ERR_STALE_STATEID:
319 case -NFS4ERR_STALE_CLIENTID:
320 nfs4_schedule_lease_recovery(clp);
321 goto wait_on_recovery;
322 #if defined(CONFIG_NFS_V4_1)
323 case -NFS4ERR_BADSESSION:
324 case -NFS4ERR_BADSLOT:
325 case -NFS4ERR_BAD_HIGH_SLOT:
326 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
327 case -NFS4ERR_DEADSESSION:
328 case -NFS4ERR_SEQ_FALSE_RETRY:
329 case -NFS4ERR_SEQ_MISORDERED:
330 dprintk("%s ERROR: %d Reset session\n", __func__,
332 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
333 goto wait_on_recovery;
334 #endif /* defined(CONFIG_NFS_V4_1) */
335 case -NFS4ERR_FILE_OPEN:
336 if (exception->timeout > HZ) {
337 /* We have retried a decent amount, time to
345 ret = nfs4_delay(server->client, &exception->timeout);
348 case -NFS4ERR_RETRY_UNCACHED_REP:
349 case -NFS4ERR_OLD_STATEID:
350 exception->retry = 1;
352 case -NFS4ERR_BADOWNER:
353 /* The following works around a Linux server bug! */
354 case -NFS4ERR_BADNAME:
355 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
356 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
357 exception->retry = 1;
358 printk(KERN_WARNING "NFS: v4 server %s "
359 "does not accept raw "
361 "Reenabling the idmapper.\n",
362 server->nfs_client->cl_hostname);
365 /* We failed to handle the error */
366 return nfs4_map_errors(ret);
368 ret = nfs4_wait_clnt_recover(clp);
370 exception->retry = 1;
375 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
377 spin_lock(&clp->cl_lock);
378 if (time_before(clp->cl_last_renewal,timestamp))
379 clp->cl_last_renewal = timestamp;
380 spin_unlock(&clp->cl_lock);
383 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
385 do_renew_lease(server->nfs_client, timestamp);
388 #if defined(CONFIG_NFS_V4_1)
390 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
392 struct nfs4_session *session;
393 struct nfs4_slot_table *tbl;
394 bool send_new_highest_used_slotid = false;
397 /* just wake up the next guy waiting since
398 * we may have not consumed a slot after all */
399 dprintk("%s: No slot\n", __func__);
402 tbl = res->sr_slot->table;
403 session = tbl->session;
405 spin_lock(&tbl->slot_tbl_lock);
406 /* Be nice to the server: try to ensure that the last transmitted
407 * value for highest_user_slotid <= target_highest_slotid
409 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
410 send_new_highest_used_slotid = true;
412 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
413 send_new_highest_used_slotid = false;
416 nfs4_free_slot(tbl, res->sr_slot);
418 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
419 send_new_highest_used_slotid = false;
421 spin_unlock(&tbl->slot_tbl_lock);
423 if (send_new_highest_used_slotid)
424 nfs41_server_notify_highest_slotid_update(session->clp);
427 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
429 struct nfs4_session *session;
430 struct nfs4_slot *slot;
431 struct nfs_client *clp;
432 bool interrupted = false;
435 /* don't increment the sequence number if the task wasn't sent */
436 if (!RPC_WAS_SENT(task))
440 session = slot->table->session;
442 if (slot->interrupted) {
443 slot->interrupted = 0;
447 /* Check the SEQUENCE operation status */
448 switch (res->sr_status) {
450 /* Update the slot's sequence and clientid lease timer */
453 do_renew_lease(clp, res->sr_timestamp);
454 /* Check sequence flags */
455 if (res->sr_status_flags != 0)
456 nfs4_schedule_lease_recovery(clp);
457 nfs41_update_target_slotid(slot->table, slot, res);
461 * sr_status remains 1 if an RPC level error occurred.
462 * The server may or may not have processed the sequence
464 * Mark the slot as having hosted an interrupted RPC call.
466 slot->interrupted = 1;
469 /* The server detected a resend of the RPC call and
470 * returned NFS4ERR_DELAY as per Section 2.10.6.2
473 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
478 case -NFS4ERR_BADSLOT:
480 * The slot id we used was probably retired. Try again
481 * using a different slot id.
484 case -NFS4ERR_SEQ_MISORDERED:
486 * Was the last operation on this sequence interrupted?
487 * If so, retry after bumping the sequence number.
494 * Could this slot have been previously retired?
495 * If so, then the server may be expecting seq_nr = 1!
497 if (slot->seq_nr != 1) {
502 case -NFS4ERR_SEQ_FALSE_RETRY:
506 /* Just update the slot sequence no. */
510 /* The session may be reset by one of the error handlers. */
511 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
512 nfs41_sequence_free_slot(res);
515 if (rpc_restart_call_prepare(task)) {
521 if (!rpc_restart_call(task))
523 rpc_delay(task, NFS4_POLL_RETRY_MAX);
527 static int nfs4_sequence_done(struct rpc_task *task,
528 struct nfs4_sequence_res *res)
530 if (res->sr_slot == NULL)
532 return nfs41_sequence_done(task, res);
535 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
536 struct nfs4_sequence_res *res, int cache_reply)
538 args->sa_slot = NULL;
539 args->sa_cache_this = 0;
540 args->sa_privileged = 0;
542 args->sa_cache_this = 1;
546 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
548 args->sa_privileged = 1;
551 int nfs41_setup_sequence(struct nfs4_session *session,
552 struct nfs4_sequence_args *args,
553 struct nfs4_sequence_res *res,
554 struct rpc_task *task)
556 struct nfs4_slot *slot;
557 struct nfs4_slot_table *tbl;
559 dprintk("--> %s\n", __func__);
560 /* slot already allocated? */
561 if (res->sr_slot != NULL)
564 tbl = &session->fc_slot_table;
566 task->tk_timeout = 0;
568 spin_lock(&tbl->slot_tbl_lock);
569 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
570 !args->sa_privileged) {
571 /* The state manager will wait until the slot table is empty */
572 dprintk("%s session is draining\n", __func__);
576 slot = nfs4_alloc_slot(tbl);
578 /* If out of memory, try again in 1/4 second */
579 if (slot == ERR_PTR(-ENOMEM))
580 task->tk_timeout = HZ >> 2;
581 dprintk("<-- %s: no free slots\n", __func__);
584 spin_unlock(&tbl->slot_tbl_lock);
586 args->sa_slot = slot;
588 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
589 slot->slot_nr, slot->seq_nr);
592 res->sr_timestamp = jiffies;
593 res->sr_status_flags = 0;
595 * sr_status is only set in decode_sequence, and so will remain
596 * set to 1 if an rpc level failure occurs.
600 rpc_call_start(task);
603 /* Privileged tasks are queued with top priority */
604 if (args->sa_privileged)
605 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
606 NULL, RPC_PRIORITY_PRIVILEGED);
608 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
609 spin_unlock(&tbl->slot_tbl_lock);
612 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
614 int nfs4_setup_sequence(const struct nfs_server *server,
615 struct nfs4_sequence_args *args,
616 struct nfs4_sequence_res *res,
617 struct rpc_task *task)
619 struct nfs4_session *session = nfs4_get_session(server);
622 if (session == NULL) {
623 rpc_call_start(task);
627 dprintk("--> %s clp %p session %p sr_slot %d\n",
628 __func__, session->clp, session, res->sr_slot ?
629 res->sr_slot->slot_nr : -1);
631 ret = nfs41_setup_sequence(session, args, res, task);
633 dprintk("<-- %s status=%d\n", __func__, ret);
637 struct nfs41_call_sync_data {
638 const struct nfs_server *seq_server;
639 struct nfs4_sequence_args *seq_args;
640 struct nfs4_sequence_res *seq_res;
643 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
645 struct nfs41_call_sync_data *data = calldata;
646 struct nfs4_session *session = nfs4_get_session(data->seq_server);
648 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
650 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
653 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
655 struct nfs41_call_sync_data *data = calldata;
657 nfs41_sequence_done(task, data->seq_res);
660 static const struct rpc_call_ops nfs41_call_sync_ops = {
661 .rpc_call_prepare = nfs41_call_sync_prepare,
662 .rpc_call_done = nfs41_call_sync_done,
665 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
666 struct nfs_server *server,
667 struct rpc_message *msg,
668 struct nfs4_sequence_args *args,
669 struct nfs4_sequence_res *res)
672 struct rpc_task *task;
673 struct nfs41_call_sync_data data = {
674 .seq_server = server,
678 struct rpc_task_setup task_setup = {
681 .callback_ops = &nfs41_call_sync_ops,
682 .callback_data = &data
685 task = rpc_run_task(&task_setup);
689 ret = task->tk_status;
697 void nfs41_init_sequence(struct nfs4_sequence_args *args,
698 struct nfs4_sequence_res *res, int cache_reply)
702 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
707 static int nfs4_sequence_done(struct rpc_task *task,
708 struct nfs4_sequence_res *res)
712 #endif /* CONFIG_NFS_V4_1 */
715 int _nfs4_call_sync(struct rpc_clnt *clnt,
716 struct nfs_server *server,
717 struct rpc_message *msg,
718 struct nfs4_sequence_args *args,
719 struct nfs4_sequence_res *res)
721 return rpc_call_sync(clnt, msg, 0);
725 int nfs4_call_sync(struct rpc_clnt *clnt,
726 struct nfs_server *server,
727 struct rpc_message *msg,
728 struct nfs4_sequence_args *args,
729 struct nfs4_sequence_res *res,
732 nfs41_init_sequence(args, res, cache_reply);
733 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
737 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
739 struct nfs_inode *nfsi = NFS_I(dir);
741 spin_lock(&dir->i_lock);
742 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
743 if (!cinfo->atomic || cinfo->before != dir->i_version)
744 nfs_force_lookup_revalidate(dir);
745 dir->i_version = cinfo->after;
746 nfs_fscache_invalidate(dir);
747 spin_unlock(&dir->i_lock);
750 struct nfs4_opendata {
752 struct nfs_openargs o_arg;
753 struct nfs_openres o_res;
754 struct nfs_open_confirmargs c_arg;
755 struct nfs_open_confirmres c_res;
756 struct nfs4_string owner_name;
757 struct nfs4_string group_name;
758 struct nfs_fattr f_attr;
760 struct dentry *dentry;
761 struct nfs4_state_owner *owner;
762 struct nfs4_state *state;
764 unsigned long timestamp;
765 unsigned int rpc_done : 1;
771 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
773 p->o_res.f_attr = &p->f_attr;
774 p->o_res.seqid = p->o_arg.seqid;
775 p->c_res.seqid = p->c_arg.seqid;
776 p->o_res.server = p->o_arg.server;
777 p->o_res.access_request = p->o_arg.access;
778 nfs_fattr_init(&p->f_attr);
779 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
782 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
783 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
784 const struct iattr *attrs,
787 struct dentry *parent = dget_parent(dentry);
788 struct inode *dir = parent->d_inode;
789 struct nfs_server *server = NFS_SERVER(dir);
790 struct nfs4_opendata *p;
792 p = kzalloc(sizeof(*p), gfp_mask);
795 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
796 if (p->o_arg.seqid == NULL)
798 nfs_sb_active(dentry->d_sb);
799 p->dentry = dget(dentry);
802 atomic_inc(&sp->so_count);
803 p->o_arg.fh = NFS_FH(dir);
804 p->o_arg.open_flags = flags;
805 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
806 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
807 * will return permission denied for all bits until close */
808 if (!(flags & O_EXCL)) {
809 /* ask server to check for all possible rights as results
811 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
812 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
814 p->o_arg.clientid = server->nfs_client->cl_clientid;
815 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
816 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
817 p->o_arg.name = &dentry->d_name;
818 p->o_arg.server = server;
819 p->o_arg.bitmask = server->attr_bitmask;
820 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
821 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
822 if (attrs != NULL && attrs->ia_valid != 0) {
825 p->o_arg.u.attrs = &p->attrs;
826 memcpy(&p->attrs, attrs, sizeof(p->attrs));
829 verf[1] = current->pid;
830 memcpy(p->o_arg.u.verifier.data, verf,
831 sizeof(p->o_arg.u.verifier.data));
833 p->c_arg.fh = &p->o_res.fh;
834 p->c_arg.stateid = &p->o_res.stateid;
835 p->c_arg.seqid = p->o_arg.seqid;
836 nfs4_init_opendata_res(p);
846 static void nfs4_opendata_free(struct kref *kref)
848 struct nfs4_opendata *p = container_of(kref,
849 struct nfs4_opendata, kref);
850 struct super_block *sb = p->dentry->d_sb;
852 nfs_free_seqid(p->o_arg.seqid);
853 if (p->state != NULL)
854 nfs4_put_open_state(p->state);
855 nfs4_put_state_owner(p->owner);
859 nfs_fattr_free_names(&p->f_attr);
863 static void nfs4_opendata_put(struct nfs4_opendata *p)
866 kref_put(&p->kref, nfs4_opendata_free);
869 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
873 ret = rpc_wait_for_completion_task(task);
877 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
881 if (open_mode & (O_EXCL|O_TRUNC))
883 switch (mode & (FMODE_READ|FMODE_WRITE)) {
885 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
886 && state->n_rdonly != 0;
889 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
890 && state->n_wronly != 0;
892 case FMODE_READ|FMODE_WRITE:
893 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
894 && state->n_rdwr != 0;
900 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
902 if (delegation == NULL)
904 if ((delegation->type & fmode) != fmode)
906 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
908 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
910 nfs_mark_delegation_referenced(delegation);
914 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
923 case FMODE_READ|FMODE_WRITE:
926 nfs4_state_set_mode_locked(state, state->state | fmode);
929 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
931 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
932 nfs4_stateid_copy(&state->stateid, stateid);
933 nfs4_stateid_copy(&state->open_stateid, stateid);
936 set_bit(NFS_O_RDONLY_STATE, &state->flags);
939 set_bit(NFS_O_WRONLY_STATE, &state->flags);
941 case FMODE_READ|FMODE_WRITE:
942 set_bit(NFS_O_RDWR_STATE, &state->flags);
946 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
948 write_seqlock(&state->seqlock);
949 nfs_set_open_stateid_locked(state, stateid, fmode);
950 write_sequnlock(&state->seqlock);
953 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
956 * Protect the call to nfs4_state_set_mode_locked and
957 * serialise the stateid update
959 write_seqlock(&state->seqlock);
960 if (deleg_stateid != NULL) {
961 nfs4_stateid_copy(&state->stateid, deleg_stateid);
962 set_bit(NFS_DELEGATED_STATE, &state->flags);
964 if (open_stateid != NULL)
965 nfs_set_open_stateid_locked(state, open_stateid, fmode);
966 write_sequnlock(&state->seqlock);
967 spin_lock(&state->owner->so_lock);
968 update_open_stateflags(state, fmode);
969 spin_unlock(&state->owner->so_lock);
972 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
974 struct nfs_inode *nfsi = NFS_I(state->inode);
975 struct nfs_delegation *deleg_cur;
978 fmode &= (FMODE_READ|FMODE_WRITE);
981 deleg_cur = rcu_dereference(nfsi->delegation);
982 if (deleg_cur == NULL)
985 spin_lock(&deleg_cur->lock);
986 if (nfsi->delegation != deleg_cur ||
987 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
988 (deleg_cur->type & fmode) != fmode)
989 goto no_delegation_unlock;
991 if (delegation == NULL)
992 delegation = &deleg_cur->stateid;
993 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
994 goto no_delegation_unlock;
996 nfs_mark_delegation_referenced(deleg_cur);
997 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
999 no_delegation_unlock:
1000 spin_unlock(&deleg_cur->lock);
1004 if (!ret && open_stateid != NULL) {
1005 __update_open_stateid(state, open_stateid, NULL, fmode);
1013 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1015 struct nfs_delegation *delegation;
1018 delegation = rcu_dereference(NFS_I(inode)->delegation);
1019 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1024 nfs4_inode_return_delegation(inode);
1027 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1029 struct nfs4_state *state = opendata->state;
1030 struct nfs_inode *nfsi = NFS_I(state->inode);
1031 struct nfs_delegation *delegation;
1032 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1033 fmode_t fmode = opendata->o_arg.fmode;
1034 nfs4_stateid stateid;
1038 if (can_open_cached(state, fmode, open_mode)) {
1039 spin_lock(&state->owner->so_lock);
1040 if (can_open_cached(state, fmode, open_mode)) {
1041 update_open_stateflags(state, fmode);
1042 spin_unlock(&state->owner->so_lock);
1043 goto out_return_state;
1045 spin_unlock(&state->owner->so_lock);
1048 delegation = rcu_dereference(nfsi->delegation);
1049 if (!can_open_delegated(delegation, fmode)) {
1053 /* Save the delegation */
1054 nfs4_stateid_copy(&stateid, &delegation->stateid);
1056 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1061 /* Try to update the stateid using the delegation */
1062 if (update_open_stateid(state, NULL, &stateid, fmode))
1063 goto out_return_state;
1066 return ERR_PTR(ret);
1068 atomic_inc(&state->count);
1073 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1075 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1076 struct nfs_delegation *delegation;
1077 int delegation_flags = 0;
1080 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1082 delegation_flags = delegation->flags;
1084 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1085 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1086 "returning a delegation for "
1087 "OPEN(CLAIM_DELEGATE_CUR)\n",
1089 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1090 nfs_inode_set_delegation(state->inode,
1091 data->owner->so_cred,
1094 nfs_inode_reclaim_delegation(state->inode,
1095 data->owner->so_cred,
1100 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1101 * and update the nfs4_state.
1103 static struct nfs4_state *
1104 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1106 struct inode *inode = data->state->inode;
1107 struct nfs4_state *state = data->state;
1110 if (!data->rpc_done) {
1111 ret = data->rpc_status;
1116 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1117 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1118 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1122 state = nfs4_get_open_state(inode, data->owner);
1126 ret = nfs_refresh_inode(inode, &data->f_attr);
1130 if (data->o_res.delegation_type != 0)
1131 nfs4_opendata_check_deleg(data, state);
1132 update_open_stateid(state, &data->o_res.stateid, NULL,
1137 return ERR_PTR(ret);
1141 static struct nfs4_state *
1142 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1144 struct inode *inode;
1145 struct nfs4_state *state = NULL;
1148 if (!data->rpc_done) {
1149 state = nfs4_try_open_cached(data);
1154 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1156 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1157 ret = PTR_ERR(inode);
1161 state = nfs4_get_open_state(inode, data->owner);
1164 if (data->o_res.delegation_type != 0)
1165 nfs4_opendata_check_deleg(data, state);
1166 update_open_stateid(state, &data->o_res.stateid, NULL,
1170 nfs_release_seqid(data->o_arg.seqid);
1175 return ERR_PTR(ret);
1178 static struct nfs4_state *
1179 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1181 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1182 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1183 return _nfs4_opendata_to_nfs4_state(data);
1186 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1188 struct nfs_inode *nfsi = NFS_I(state->inode);
1189 struct nfs_open_context *ctx;
1191 spin_lock(&state->inode->i_lock);
1192 list_for_each_entry(ctx, &nfsi->open_files, list) {
1193 if (ctx->state != state)
1195 get_nfs_open_context(ctx);
1196 spin_unlock(&state->inode->i_lock);
1199 spin_unlock(&state->inode->i_lock);
1200 return ERR_PTR(-ENOENT);
1203 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1205 struct nfs4_opendata *opendata;
1207 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1208 if (opendata == NULL)
1209 return ERR_PTR(-ENOMEM);
1210 opendata->state = state;
1211 atomic_inc(&state->count);
1215 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1217 struct nfs4_state *newstate;
1220 opendata->o_arg.open_flags = 0;
1221 opendata->o_arg.fmode = fmode;
1222 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1223 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1224 nfs4_init_opendata_res(opendata);
1225 ret = _nfs4_recover_proc_open(opendata);
1228 newstate = nfs4_opendata_to_nfs4_state(opendata);
1229 if (IS_ERR(newstate))
1230 return PTR_ERR(newstate);
1231 nfs4_close_state(newstate, fmode);
1236 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1238 struct nfs4_state *newstate;
1241 /* memory barrier prior to reading state->n_* */
1242 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1244 if (state->n_rdwr != 0) {
1245 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1246 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1249 if (newstate != state)
1252 if (state->n_wronly != 0) {
1253 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1254 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1257 if (newstate != state)
1260 if (state->n_rdonly != 0) {
1261 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1262 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1265 if (newstate != state)
1269 * We may have performed cached opens for all three recoveries.
1270 * Check if we need to update the current stateid.
1272 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1273 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1274 write_seqlock(&state->seqlock);
1275 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1276 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1277 write_sequnlock(&state->seqlock);
1284 * reclaim state on the server after a reboot.
1286 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1288 struct nfs_delegation *delegation;
1289 struct nfs4_opendata *opendata;
1290 fmode_t delegation_type = 0;
1293 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1294 if (IS_ERR(opendata))
1295 return PTR_ERR(opendata);
1296 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1297 opendata->o_arg.fh = NFS_FH(state->inode);
1299 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1300 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1301 delegation_type = delegation->type;
1303 opendata->o_arg.u.delegation_type = delegation_type;
1304 status = nfs4_open_recover(opendata, state);
1305 nfs4_opendata_put(opendata);
1309 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1311 struct nfs_server *server = NFS_SERVER(state->inode);
1312 struct nfs4_exception exception = { };
1315 err = _nfs4_do_open_reclaim(ctx, state);
1316 if (err != -NFS4ERR_DELAY)
1318 nfs4_handle_exception(server, err, &exception);
1319 } while (exception.retry);
1323 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1325 struct nfs_open_context *ctx;
1328 ctx = nfs4_state_find_open_context(state);
1330 return PTR_ERR(ctx);
1331 ret = nfs4_do_open_reclaim(ctx, state);
1332 put_nfs_open_context(ctx);
1336 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1338 struct nfs4_opendata *opendata;
1341 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1342 if (IS_ERR(opendata))
1343 return PTR_ERR(opendata);
1344 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1345 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1346 ret = nfs4_open_recover(opendata, state);
1347 nfs4_opendata_put(opendata);
1351 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1353 struct nfs4_exception exception = { };
1354 struct nfs_server *server = NFS_SERVER(state->inode);
1357 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1363 case -NFS4ERR_BADSESSION:
1364 case -NFS4ERR_BADSLOT:
1365 case -NFS4ERR_BAD_HIGH_SLOT:
1366 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1367 case -NFS4ERR_DEADSESSION:
1368 set_bit(NFS_DELEGATED_STATE, &state->flags);
1369 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1372 case -NFS4ERR_STALE_CLIENTID:
1373 case -NFS4ERR_STALE_STATEID:
1374 set_bit(NFS_DELEGATED_STATE, &state->flags);
1375 case -NFS4ERR_EXPIRED:
1376 /* Don't recall a delegation if it was lost */
1377 nfs4_schedule_lease_recovery(server->nfs_client);
1380 case -NFS4ERR_DELEG_REVOKED:
1381 case -NFS4ERR_ADMIN_REVOKED:
1382 case -NFS4ERR_BAD_STATEID:
1383 nfs_inode_find_state_and_recover(state->inode,
1385 nfs4_schedule_stateid_recovery(server, state);
1390 set_bit(NFS_DELEGATED_STATE, &state->flags);
1391 err = nfs4_handle_exception(server, err, &exception);
1392 } while (exception.retry);
1397 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1399 struct nfs4_opendata *data = calldata;
1401 data->rpc_status = task->tk_status;
1402 if (data->rpc_status == 0) {
1403 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1404 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1405 renew_lease(data->o_res.server, data->timestamp);
1410 static void nfs4_open_confirm_release(void *calldata)
1412 struct nfs4_opendata *data = calldata;
1413 struct nfs4_state *state = NULL;
1415 /* If this request hasn't been cancelled, do nothing */
1416 if (data->cancelled == 0)
1418 /* In case of error, no cleanup! */
1419 if (!data->rpc_done)
1421 state = nfs4_opendata_to_nfs4_state(data);
1423 nfs4_close_state(state, data->o_arg.fmode);
1425 nfs4_opendata_put(data);
1428 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1429 .rpc_call_done = nfs4_open_confirm_done,
1430 .rpc_release = nfs4_open_confirm_release,
1434 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1436 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1438 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1439 struct rpc_task *task;
1440 struct rpc_message msg = {
1441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1442 .rpc_argp = &data->c_arg,
1443 .rpc_resp = &data->c_res,
1444 .rpc_cred = data->owner->so_cred,
1446 struct rpc_task_setup task_setup_data = {
1447 .rpc_client = server->client,
1448 .rpc_message = &msg,
1449 .callback_ops = &nfs4_open_confirm_ops,
1450 .callback_data = data,
1451 .workqueue = nfsiod_workqueue,
1452 .flags = RPC_TASK_ASYNC,
1456 kref_get(&data->kref);
1458 data->rpc_status = 0;
1459 data->timestamp = jiffies;
1460 task = rpc_run_task(&task_setup_data);
1462 return PTR_ERR(task);
1463 status = nfs4_wait_for_completion_rpc_task(task);
1465 data->cancelled = 1;
1468 status = data->rpc_status;
1473 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1475 struct nfs4_opendata *data = calldata;
1476 struct nfs4_state_owner *sp = data->owner;
1478 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1481 * Check if we still need to send an OPEN call, or if we can use
1482 * a delegation instead.
1484 if (data->state != NULL) {
1485 struct nfs_delegation *delegation;
1487 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1490 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1491 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1492 can_open_delegated(delegation, data->o_arg.fmode))
1493 goto unlock_no_action;
1496 /* Update client id. */
1497 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1498 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1499 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1500 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1501 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1503 data->timestamp = jiffies;
1504 if (nfs4_setup_sequence(data->o_arg.server,
1505 &data->o_arg.seq_args,
1506 &data->o_res.seq_res,
1508 nfs_release_seqid(data->o_arg.seqid);
1513 task->tk_action = NULL;
1515 nfs4_sequence_done(task, &data->o_res.seq_res);
1518 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1520 struct nfs4_opendata *data = calldata;
1522 data->rpc_status = task->tk_status;
1524 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1527 if (task->tk_status == 0) {
1528 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1529 switch (data->o_res.f_attr->mode & S_IFMT) {
1533 data->rpc_status = -ELOOP;
1536 data->rpc_status = -EISDIR;
1539 data->rpc_status = -ENOTDIR;
1542 renew_lease(data->o_res.server, data->timestamp);
1543 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1544 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1549 static void nfs4_open_release(void *calldata)
1551 struct nfs4_opendata *data = calldata;
1552 struct nfs4_state *state = NULL;
1554 /* If this request hasn't been cancelled, do nothing */
1555 if (data->cancelled == 0)
1557 /* In case of error, no cleanup! */
1558 if (data->rpc_status != 0 || !data->rpc_done)
1560 /* In case we need an open_confirm, no cleanup! */
1561 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1563 state = nfs4_opendata_to_nfs4_state(data);
1565 nfs4_close_state(state, data->o_arg.fmode);
1567 nfs4_opendata_put(data);
1570 static const struct rpc_call_ops nfs4_open_ops = {
1571 .rpc_call_prepare = nfs4_open_prepare,
1572 .rpc_call_done = nfs4_open_done,
1573 .rpc_release = nfs4_open_release,
1576 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1578 struct inode *dir = data->dir->d_inode;
1579 struct nfs_server *server = NFS_SERVER(dir);
1580 struct nfs_openargs *o_arg = &data->o_arg;
1581 struct nfs_openres *o_res = &data->o_res;
1582 struct rpc_task *task;
1583 struct rpc_message msg = {
1584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1587 .rpc_cred = data->owner->so_cred,
1589 struct rpc_task_setup task_setup_data = {
1590 .rpc_client = server->client,
1591 .rpc_message = &msg,
1592 .callback_ops = &nfs4_open_ops,
1593 .callback_data = data,
1594 .workqueue = nfsiod_workqueue,
1595 .flags = RPC_TASK_ASYNC,
1599 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1600 kref_get(&data->kref);
1602 data->rpc_status = 0;
1603 data->cancelled = 0;
1605 nfs4_set_sequence_privileged(&o_arg->seq_args);
1606 task = rpc_run_task(&task_setup_data);
1608 return PTR_ERR(task);
1609 status = nfs4_wait_for_completion_rpc_task(task);
1611 data->cancelled = 1;
1614 status = data->rpc_status;
1620 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1622 struct inode *dir = data->dir->d_inode;
1623 struct nfs_openres *o_res = &data->o_res;
1626 status = nfs4_run_open_task(data, 1);
1627 if (status != 0 || !data->rpc_done)
1630 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1632 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1633 status = _nfs4_proc_open_confirm(data);
1641 static int nfs4_opendata_access(struct rpc_cred *cred,
1642 struct nfs4_opendata *opendata,
1643 struct nfs4_state *state, fmode_t fmode,
1646 struct nfs_access_entry cache;
1649 /* access call failed or for some reason the server doesn't
1650 * support any access modes -- defer access call until later */
1651 if (opendata->o_res.access_supported == 0)
1655 /* don't check MAY_WRITE - a newly created file may not have
1656 * write mode bits, but POSIX allows the creating process to write.
1657 * use openflags to check for exec, because fmode won't
1658 * always have FMODE_EXEC set when file open for exec. */
1659 if (openflags & __FMODE_EXEC) {
1660 /* ONLY check for exec rights */
1662 } else if (fmode & FMODE_READ)
1666 cache.jiffies = jiffies;
1667 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1668 nfs_access_add_cache(state->inode, &cache);
1670 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1673 /* even though OPEN succeeded, access is denied. Close the file */
1674 nfs4_close_state(state, fmode);
1679 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1681 static int _nfs4_proc_open(struct nfs4_opendata *data)
1683 struct inode *dir = data->dir->d_inode;
1684 struct nfs_server *server = NFS_SERVER(dir);
1685 struct nfs_openargs *o_arg = &data->o_arg;
1686 struct nfs_openres *o_res = &data->o_res;
1689 status = nfs4_run_open_task(data, 0);
1690 if (!data->rpc_done)
1693 if (status == -NFS4ERR_BADNAME &&
1694 !(o_arg->open_flags & O_CREAT))
1699 nfs_fattr_map_and_free_names(server, &data->f_attr);
1701 if (o_arg->open_flags & O_CREAT)
1702 update_changeattr(dir, &o_res->cinfo);
1703 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1704 server->caps &= ~NFS_CAP_POSIX_LOCK;
1705 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1706 status = _nfs4_proc_open_confirm(data);
1710 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1711 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1715 static int nfs4_recover_expired_lease(struct nfs_server *server)
1717 return nfs4_client_recover_expired_lease(server->nfs_client);
1722 * reclaim state on the server after a network partition.
1723 * Assumes caller holds the appropriate lock
1725 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1727 struct nfs4_opendata *opendata;
1730 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1731 if (IS_ERR(opendata))
1732 return PTR_ERR(opendata);
1733 ret = nfs4_open_recover(opendata, state);
1735 d_drop(ctx->dentry);
1736 nfs4_opendata_put(opendata);
1740 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1742 struct nfs_server *server = NFS_SERVER(state->inode);
1743 struct nfs4_exception exception = { };
1747 err = _nfs4_open_expired(ctx, state);
1751 case -NFS4ERR_GRACE:
1752 case -NFS4ERR_DELAY:
1753 nfs4_handle_exception(server, err, &exception);
1756 } while (exception.retry);
1761 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1763 struct nfs_open_context *ctx;
1766 ctx = nfs4_state_find_open_context(state);
1768 return PTR_ERR(ctx);
1769 ret = nfs4_do_open_expired(ctx, state);
1770 put_nfs_open_context(ctx);
1774 #if defined(CONFIG_NFS_V4_1)
1775 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1777 struct nfs_server *server = NFS_SERVER(state->inode);
1778 nfs4_stateid *stateid = &state->stateid;
1781 /* If a state reset has been done, test_stateid is unneeded */
1782 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1785 status = nfs41_test_stateid(server, stateid);
1786 if (status != NFS_OK) {
1787 /* Free the stateid unless the server explicitly
1788 * informs us the stateid is unrecognized. */
1789 if (status != -NFS4ERR_BAD_STATEID)
1790 nfs41_free_stateid(server, stateid);
1791 nfs_remove_bad_delegation(state->inode);
1793 write_seqlock(&state->seqlock);
1794 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1795 write_sequnlock(&state->seqlock);
1796 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1801 * nfs41_check_open_stateid - possibly free an open stateid
1803 * @state: NFSv4 state for an inode
1805 * Returns NFS_OK if recovery for this stateid is now finished.
1806 * Otherwise a negative NFS4ERR value is returned.
1808 static int nfs41_check_open_stateid(struct nfs4_state *state)
1810 struct nfs_server *server = NFS_SERVER(state->inode);
1811 nfs4_stateid *stateid = &state->open_stateid;
1814 /* If a state reset has been done, test_stateid is unneeded */
1815 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1816 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1817 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1818 return -NFS4ERR_BAD_STATEID;
1820 status = nfs41_test_stateid(server, stateid);
1821 if (status != NFS_OK) {
1822 /* Free the stateid unless the server explicitly
1823 * informs us the stateid is unrecognized. */
1824 if (status != -NFS4ERR_BAD_STATEID)
1825 nfs41_free_stateid(server, stateid);
1827 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1828 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1829 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1834 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1838 nfs41_clear_delegation_stateid(state);
1839 status = nfs41_check_open_stateid(state);
1840 if (status != NFS_OK)
1841 status = nfs4_open_expired(sp, state);
1847 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1848 * fields corresponding to attributes that were used to store the verifier.
1849 * Make sure we clobber those fields in the later setattr call
1851 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1853 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1854 !(sattr->ia_valid & ATTR_ATIME_SET))
1855 sattr->ia_valid |= ATTR_ATIME;
1857 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1858 !(sattr->ia_valid & ATTR_MTIME_SET))
1859 sattr->ia_valid |= ATTR_MTIME;
1862 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1865 struct nfs4_state **res)
1867 struct nfs4_state_owner *sp = opendata->owner;
1868 struct nfs_server *server = sp->so_server;
1869 struct nfs4_state *state;
1873 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1875 ret = _nfs4_proc_open(opendata);
1879 state = nfs4_opendata_to_nfs4_state(opendata);
1880 ret = PTR_ERR(state);
1883 if (server->caps & NFS_CAP_POSIX_LOCK)
1884 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1886 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1890 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
1891 nfs4_schedule_stateid_recovery(server, state);
1892 nfs4_wait_clnt_recover(server->nfs_client);
1900 * Returns a referenced nfs4_state
1902 static int _nfs4_do_open(struct inode *dir,
1903 struct dentry *dentry,
1906 struct iattr *sattr,
1907 struct rpc_cred *cred,
1908 struct nfs4_state **res,
1909 struct nfs4_threshold **ctx_th)
1911 struct nfs4_state_owner *sp;
1912 struct nfs4_state *state = NULL;
1913 struct nfs_server *server = NFS_SERVER(dir);
1914 struct nfs4_opendata *opendata;
1917 /* Protect against reboot recovery conflicts */
1919 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1921 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1924 status = nfs4_recover_expired_lease(server);
1926 goto err_put_state_owner;
1927 if (dentry->d_inode != NULL)
1928 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1930 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1931 if (opendata == NULL)
1932 goto err_put_state_owner;
1934 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1935 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1936 if (!opendata->f_attr.mdsthreshold)
1937 goto err_opendata_put;
1938 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
1940 if (dentry->d_inode != NULL)
1941 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1943 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
1945 goto err_opendata_put;
1947 if (opendata->o_arg.open_flags & O_EXCL) {
1948 nfs4_exclusive_attrset(opendata, sattr);
1950 nfs_fattr_init(opendata->o_res.f_attr);
1951 status = nfs4_do_setattr(state->inode, cred,
1952 opendata->o_res.f_attr, sattr,
1955 nfs_setattr_update_inode(state->inode, sattr);
1956 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1959 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1960 *ctx_th = opendata->f_attr.mdsthreshold;
1962 kfree(opendata->f_attr.mdsthreshold);
1963 opendata->f_attr.mdsthreshold = NULL;
1965 nfs4_opendata_put(opendata);
1966 nfs4_put_state_owner(sp);
1970 kfree(opendata->f_attr.mdsthreshold);
1971 nfs4_opendata_put(opendata);
1972 err_put_state_owner:
1973 nfs4_put_state_owner(sp);
1980 static struct nfs4_state *nfs4_do_open(struct inode *dir,
1981 struct dentry *dentry,
1984 struct iattr *sattr,
1985 struct rpc_cred *cred,
1986 struct nfs4_threshold **ctx_th)
1988 struct nfs4_exception exception = { };
1989 struct nfs4_state *res;
1992 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1994 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1998 /* NOTE: BAD_SEQID means the server and client disagree about the
1999 * book-keeping w.r.t. state-changing operations
2000 * (OPEN/CLOSE/LOCK/LOCKU...)
2001 * It is actually a sign of a bug on the client or on the server.
2003 * If we receive a BAD_SEQID error in the particular case of
2004 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2005 * have unhashed the old state_owner for us, and that we can
2006 * therefore safely retry using a new one. We should still warn
2007 * the user though...
2009 if (status == -NFS4ERR_BAD_SEQID) {
2010 pr_warn_ratelimited("NFS: v4 server %s "
2011 " returned a bad sequence-id error!\n",
2012 NFS_SERVER(dir)->nfs_client->cl_hostname);
2013 exception.retry = 1;
2017 * BAD_STATEID on OPEN means that the server cancelled our
2018 * state before it received the OPEN_CONFIRM.
2019 * Recover by retrying the request as per the discussion
2020 * on Page 181 of RFC3530.
2022 if (status == -NFS4ERR_BAD_STATEID) {
2023 exception.retry = 1;
2026 if (status == -EAGAIN) {
2027 /* We must have found a delegation */
2028 exception.retry = 1;
2031 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2032 status, &exception));
2033 } while (exception.retry);
2037 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2038 struct nfs_fattr *fattr, struct iattr *sattr,
2039 struct nfs4_state *state)
2041 struct nfs_server *server = NFS_SERVER(inode);
2042 struct nfs_setattrargs arg = {
2043 .fh = NFS_FH(inode),
2046 .bitmask = server->attr_bitmask,
2048 struct nfs_setattrres res = {
2052 struct rpc_message msg = {
2053 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2058 unsigned long timestamp = jiffies;
2061 nfs_fattr_init(fattr);
2063 if (state != NULL && nfs4_valid_open_stateid(state)) {
2064 struct nfs_lockowner lockowner = {
2065 .l_owner = current->files,
2066 .l_pid = current->tgid,
2068 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2070 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2072 /* Use that stateid */
2074 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2076 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2077 if (status == 0 && state != NULL)
2078 renew_lease(server, timestamp);
2082 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2083 struct nfs_fattr *fattr, struct iattr *sattr,
2084 struct nfs4_state *state)
2086 struct nfs_server *server = NFS_SERVER(inode);
2087 struct nfs4_exception exception = {
2093 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2095 case -NFS4ERR_OPENMODE:
2096 if (state && !(state->state & FMODE_WRITE)) {
2098 if (sattr->ia_valid & ATTR_OPEN)
2103 err = nfs4_handle_exception(server, err, &exception);
2104 } while (exception.retry);
2109 struct nfs4_closedata {
2110 struct inode *inode;
2111 struct nfs4_state *state;
2112 struct nfs_closeargs arg;
2113 struct nfs_closeres res;
2114 struct nfs_fattr fattr;
2115 unsigned long timestamp;
2120 static void nfs4_free_closedata(void *data)
2122 struct nfs4_closedata *calldata = data;
2123 struct nfs4_state_owner *sp = calldata->state->owner;
2124 struct super_block *sb = calldata->state->inode->i_sb;
2127 pnfs_roc_release(calldata->state->inode);
2128 nfs4_put_open_state(calldata->state);
2129 nfs_free_seqid(calldata->arg.seqid);
2130 nfs4_put_state_owner(sp);
2131 nfs_sb_deactive(sb);
2135 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2138 spin_lock(&state->owner->so_lock);
2139 if (!(fmode & FMODE_READ))
2140 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2141 if (!(fmode & FMODE_WRITE))
2142 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2143 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2144 spin_unlock(&state->owner->so_lock);
2147 static void nfs4_close_done(struct rpc_task *task, void *data)
2149 struct nfs4_closedata *calldata = data;
2150 struct nfs4_state *state = calldata->state;
2151 struct nfs_server *server = NFS_SERVER(calldata->inode);
2153 dprintk("%s: begin!\n", __func__);
2154 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2156 /* hmm. we are done with the inode, and in the process of freeing
2157 * the state_owner. we keep this around to process errors
2159 switch (task->tk_status) {
2162 pnfs_roc_set_barrier(state->inode,
2163 calldata->roc_barrier);
2164 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2165 renew_lease(server, calldata->timestamp);
2166 nfs4_close_clear_stateid_flags(state,
2167 calldata->arg.fmode);
2169 case -NFS4ERR_STALE_STATEID:
2170 case -NFS4ERR_OLD_STATEID:
2171 case -NFS4ERR_BAD_STATEID:
2172 case -NFS4ERR_EXPIRED:
2173 if (calldata->arg.fmode == 0)
2176 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2177 rpc_restart_call_prepare(task);
2179 nfs_release_seqid(calldata->arg.seqid);
2180 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2181 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2184 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2186 struct nfs4_closedata *calldata = data;
2187 struct nfs4_state *state = calldata->state;
2188 struct inode *inode = calldata->inode;
2191 dprintk("%s: begin!\n", __func__);
2192 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2195 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2196 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2197 spin_lock(&state->owner->so_lock);
2198 /* Calculate the change in open mode */
2199 if (state->n_rdwr == 0) {
2200 if (state->n_rdonly == 0) {
2201 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2202 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2203 calldata->arg.fmode &= ~FMODE_READ;
2205 if (state->n_wronly == 0) {
2206 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2207 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2208 calldata->arg.fmode &= ~FMODE_WRITE;
2211 if (!nfs4_valid_open_stateid(state))
2213 spin_unlock(&state->owner->so_lock);
2216 /* Note: exit _without_ calling nfs4_close_done */
2220 if (calldata->arg.fmode == 0) {
2221 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2222 if (calldata->roc &&
2223 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
2227 nfs_fattr_init(calldata->res.fattr);
2228 calldata->timestamp = jiffies;
2229 if (nfs4_setup_sequence(NFS_SERVER(inode),
2230 &calldata->arg.seq_args,
2231 &calldata->res.seq_res,
2233 nfs_release_seqid(calldata->arg.seqid);
2234 dprintk("%s: done!\n", __func__);
2237 task->tk_action = NULL;
2239 nfs4_sequence_done(task, &calldata->res.seq_res);
2242 static const struct rpc_call_ops nfs4_close_ops = {
2243 .rpc_call_prepare = nfs4_close_prepare,
2244 .rpc_call_done = nfs4_close_done,
2245 .rpc_release = nfs4_free_closedata,
2249 * It is possible for data to be read/written from a mem-mapped file
2250 * after the sys_close call (which hits the vfs layer as a flush).
2251 * This means that we can't safely call nfsv4 close on a file until
2252 * the inode is cleared. This in turn means that we are not good
2253 * NFSv4 citizens - we do not indicate to the server to update the file's
2254 * share state even when we are done with one of the three share
2255 * stateid's in the inode.
2257 * NOTE: Caller must be holding the sp->so_owner semaphore!
2259 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2261 struct nfs_server *server = NFS_SERVER(state->inode);
2262 struct nfs4_closedata *calldata;
2263 struct nfs4_state_owner *sp = state->owner;
2264 struct rpc_task *task;
2265 struct rpc_message msg = {
2266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2267 .rpc_cred = state->owner->so_cred,
2269 struct rpc_task_setup task_setup_data = {
2270 .rpc_client = server->client,
2271 .rpc_message = &msg,
2272 .callback_ops = &nfs4_close_ops,
2273 .workqueue = nfsiod_workqueue,
2274 .flags = RPC_TASK_ASYNC,
2276 int status = -ENOMEM;
2278 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2279 if (calldata == NULL)
2281 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2282 calldata->inode = state->inode;
2283 calldata->state = state;
2284 calldata->arg.fh = NFS_FH(state->inode);
2285 calldata->arg.stateid = &state->open_stateid;
2286 /* Serialization for the sequence id */
2287 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2288 if (calldata->arg.seqid == NULL)
2289 goto out_free_calldata;
2290 calldata->arg.fmode = 0;
2291 calldata->arg.bitmask = server->cache_consistency_bitmask;
2292 calldata->res.fattr = &calldata->fattr;
2293 calldata->res.seqid = calldata->arg.seqid;
2294 calldata->res.server = server;
2295 calldata->roc = pnfs_roc(state->inode);
2296 nfs_sb_active(calldata->inode->i_sb);
2298 msg.rpc_argp = &calldata->arg;
2299 msg.rpc_resp = &calldata->res;
2300 task_setup_data.callback_data = calldata;
2301 task = rpc_run_task(&task_setup_data);
2303 return PTR_ERR(task);
2306 status = rpc_wait_for_completion_task(task);
2312 nfs4_put_open_state(state);
2313 nfs4_put_state_owner(sp);
2317 static struct inode *
2318 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2320 struct nfs4_state *state;
2322 /* Protect against concurrent sillydeletes */
2323 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2324 ctx->cred, &ctx->mdsthreshold);
2326 return ERR_CAST(state);
2328 return igrab(state->inode);
2331 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2333 if (ctx->state == NULL)
2336 nfs4_close_sync(ctx->state, ctx->mode);
2338 nfs4_close_state(ctx->state, ctx->mode);
2341 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2343 struct nfs4_server_caps_arg args = {
2346 struct nfs4_server_caps_res res = {};
2347 struct rpc_message msg = {
2348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2354 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2356 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2357 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2358 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2359 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2360 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2361 NFS_CAP_CTIME|NFS_CAP_MTIME);
2362 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2363 server->caps |= NFS_CAP_ACLS;
2364 if (res.has_links != 0)
2365 server->caps |= NFS_CAP_HARDLINKS;
2366 if (res.has_symlinks != 0)
2367 server->caps |= NFS_CAP_SYMLINKS;
2368 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2369 server->caps |= NFS_CAP_FILEID;
2370 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2371 server->caps |= NFS_CAP_MODE;
2372 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2373 server->caps |= NFS_CAP_NLINK;
2374 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2375 server->caps |= NFS_CAP_OWNER;
2376 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2377 server->caps |= NFS_CAP_OWNER_GROUP;
2378 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2379 server->caps |= NFS_CAP_ATIME;
2380 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2381 server->caps |= NFS_CAP_CTIME;
2382 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2383 server->caps |= NFS_CAP_MTIME;
2385 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2386 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2387 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2388 server->acl_bitmask = res.acl_bitmask;
2389 server->fh_expire_type = res.fh_expire_type;
2395 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2397 struct nfs4_exception exception = { };
2400 err = nfs4_handle_exception(server,
2401 _nfs4_server_capabilities(server, fhandle),
2403 } while (exception.retry);
2407 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2408 struct nfs_fsinfo *info)
2410 struct nfs4_lookup_root_arg args = {
2411 .bitmask = nfs4_fattr_bitmap,
2413 struct nfs4_lookup_res res = {
2415 .fattr = info->fattr,
2418 struct rpc_message msg = {
2419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2424 nfs_fattr_init(info->fattr);
2425 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2428 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2429 struct nfs_fsinfo *info)
2431 struct nfs4_exception exception = { };
2434 err = _nfs4_lookup_root(server, fhandle, info);
2437 case -NFS4ERR_WRONGSEC:
2440 err = nfs4_handle_exception(server, err, &exception);
2442 } while (exception.retry);
2447 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2448 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2450 struct rpc_auth *auth;
2453 auth = rpcauth_create(flavor, server->client);
2458 ret = nfs4_lookup_root(server, fhandle, info);
2463 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2464 struct nfs_fsinfo *info)
2466 int i, len, status = 0;
2467 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2469 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2473 for (i = 0; i < len; i++) {
2474 /* AUTH_UNIX is the default flavor if none was specified,
2475 * thus has already been tried. */
2476 if (flav_array[i] == RPC_AUTH_UNIX)
2479 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2480 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2485 * -EACCESS could mean that the user doesn't have correct permissions
2486 * to access the mount. It could also mean that we tried to mount
2487 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2488 * existing mount programs don't handle -EACCES very well so it should
2489 * be mapped to -EPERM instead.
2491 if (status == -EACCES)
2497 * get the file handle for the "/" directory on the server
2499 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2500 struct nfs_fsinfo *info)
2502 int minor_version = server->nfs_client->cl_minorversion;
2503 int status = nfs4_lookup_root(server, fhandle, info);
2504 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2506 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2507 * by nfs4_map_errors() as this function exits.
2509 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2511 status = nfs4_server_capabilities(server, fhandle);
2513 status = nfs4_do_fsinfo(server, fhandle, info);
2514 return nfs4_map_errors(status);
2517 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2518 struct nfs_fsinfo *info)
2521 struct nfs_fattr *fattr = info->fattr;
2523 error = nfs4_server_capabilities(server, mntfh);
2525 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2529 error = nfs4_proc_getattr(server, mntfh, fattr);
2531 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2535 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2536 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2537 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2543 * Get locations and (maybe) other attributes of a referral.
2544 * Note that we'll actually follow the referral later when
2545 * we detect fsid mismatch in inode revalidation
2547 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2548 const struct qstr *name, struct nfs_fattr *fattr,
2549 struct nfs_fh *fhandle)
2551 int status = -ENOMEM;
2552 struct page *page = NULL;
2553 struct nfs4_fs_locations *locations = NULL;
2555 page = alloc_page(GFP_KERNEL);
2558 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2559 if (locations == NULL)
2562 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2565 /* Make sure server returned a different fsid for the referral */
2566 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2567 dprintk("%s: server did not return a different fsid for"
2568 " a referral at %s\n", __func__, name->name);
2572 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2573 nfs_fixup_referral_attributes(&locations->fattr);
2575 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2576 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2577 memset(fhandle, 0, sizeof(struct nfs_fh));
2585 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2587 struct nfs4_getattr_arg args = {
2589 .bitmask = server->attr_bitmask,
2591 struct nfs4_getattr_res res = {
2595 struct rpc_message msg = {
2596 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2601 nfs_fattr_init(fattr);
2602 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2605 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2607 struct nfs4_exception exception = { };
2610 err = nfs4_handle_exception(server,
2611 _nfs4_proc_getattr(server, fhandle, fattr),
2613 } while (exception.retry);
2618 * The file is not closed if it is opened due to the a request to change
2619 * the size of the file. The open call will not be needed once the
2620 * VFS layer lookup-intents are implemented.
2622 * Close is called when the inode is destroyed.
2623 * If we haven't opened the file for O_WRONLY, we
2624 * need to in the size_change case to obtain a stateid.
2627 * Because OPEN is always done by name in nfsv4, it is
2628 * possible that we opened a different file by the same
2629 * name. We can recognize this race condition, but we
2630 * can't do anything about it besides returning an error.
2632 * This will be fixed with VFS changes (lookup-intent).
2635 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2636 struct iattr *sattr)
2638 struct inode *inode = dentry->d_inode;
2639 struct rpc_cred *cred = NULL;
2640 struct nfs4_state *state = NULL;
2643 if (pnfs_ld_layoutret_on_setattr(inode))
2644 pnfs_commit_and_return_layout(inode);
2646 nfs_fattr_init(fattr);
2648 /* Deal with open(O_TRUNC) */
2649 if (sattr->ia_valid & ATTR_OPEN)
2650 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2652 /* Optimization: if the end result is no change, don't RPC */
2653 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2656 /* Search for an existing open(O_WRITE) file */
2657 if (sattr->ia_valid & ATTR_FILE) {
2658 struct nfs_open_context *ctx;
2660 ctx = nfs_file_open_context(sattr->ia_file);
2667 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2669 nfs_setattr_update_inode(inode, sattr);
2673 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2674 const struct qstr *name, struct nfs_fh *fhandle,
2675 struct nfs_fattr *fattr)
2677 struct nfs_server *server = NFS_SERVER(dir);
2679 struct nfs4_lookup_arg args = {
2680 .bitmask = server->attr_bitmask,
2681 .dir_fh = NFS_FH(dir),
2684 struct nfs4_lookup_res res = {
2689 struct rpc_message msg = {
2690 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2695 nfs_fattr_init(fattr);
2697 dprintk("NFS call lookup %s\n", name->name);
2698 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2699 dprintk("NFS reply lookup: %d\n", status);
2703 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2705 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2706 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2707 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2711 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2712 struct qstr *name, struct nfs_fh *fhandle,
2713 struct nfs_fattr *fattr)
2715 struct nfs4_exception exception = { };
2716 struct rpc_clnt *client = *clnt;
2719 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2721 case -NFS4ERR_BADNAME:
2724 case -NFS4ERR_MOVED:
2725 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2727 case -NFS4ERR_WRONGSEC:
2729 if (client != *clnt)
2732 client = nfs4_create_sec_client(client, dir, name);
2734 return PTR_ERR(client);
2736 exception.retry = 1;
2739 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2741 } while (exception.retry);
2746 else if (client != *clnt)
2747 rpc_shutdown_client(client);
2752 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2753 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2756 struct rpc_clnt *client = NFS_CLIENT(dir);
2758 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2759 if (client != NFS_CLIENT(dir)) {
2760 rpc_shutdown_client(client);
2761 nfs_fixup_secinfo_attributes(fattr);
2767 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2768 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2771 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2773 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2775 rpc_shutdown_client(client);
2776 return ERR_PTR(status);
2781 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2783 struct nfs_server *server = NFS_SERVER(inode);
2784 struct nfs4_accessargs args = {
2785 .fh = NFS_FH(inode),
2786 .bitmask = server->cache_consistency_bitmask,
2788 struct nfs4_accessres res = {
2791 struct rpc_message msg = {
2792 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2795 .rpc_cred = entry->cred,
2797 int mode = entry->mask;
2801 * Determine which access bits we want to ask for...
2803 if (mode & MAY_READ)
2804 args.access |= NFS4_ACCESS_READ;
2805 if (S_ISDIR(inode->i_mode)) {
2806 if (mode & MAY_WRITE)
2807 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2808 if (mode & MAY_EXEC)
2809 args.access |= NFS4_ACCESS_LOOKUP;
2811 if (mode & MAY_WRITE)
2812 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2813 if (mode & MAY_EXEC)
2814 args.access |= NFS4_ACCESS_EXECUTE;
2817 res.fattr = nfs_alloc_fattr();
2818 if (res.fattr == NULL)
2821 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2823 nfs_access_set_mask(entry, res.access);
2824 nfs_refresh_inode(inode, res.fattr);
2826 nfs_free_fattr(res.fattr);
2830 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2832 struct nfs4_exception exception = { };
2835 err = nfs4_handle_exception(NFS_SERVER(inode),
2836 _nfs4_proc_access(inode, entry),
2838 } while (exception.retry);
2843 * TODO: For the time being, we don't try to get any attributes
2844 * along with any of the zero-copy operations READ, READDIR,
2847 * In the case of the first three, we want to put the GETATTR
2848 * after the read-type operation -- this is because it is hard
2849 * to predict the length of a GETATTR response in v4, and thus
2850 * align the READ data correctly. This means that the GETATTR
2851 * may end up partially falling into the page cache, and we should
2852 * shift it into the 'tail' of the xdr_buf before processing.
2853 * To do this efficiently, we need to know the total length
2854 * of data received, which doesn't seem to be available outside
2857 * In the case of WRITE, we also want to put the GETATTR after
2858 * the operation -- in this case because we want to make sure
2859 * we get the post-operation mtime and size.
2861 * Both of these changes to the XDR layer would in fact be quite
2862 * minor, but I decided to leave them for a subsequent patch.
2864 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2865 unsigned int pgbase, unsigned int pglen)
2867 struct nfs4_readlink args = {
2868 .fh = NFS_FH(inode),
2873 struct nfs4_readlink_res res;
2874 struct rpc_message msg = {
2875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2880 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2883 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2884 unsigned int pgbase, unsigned int pglen)
2886 struct nfs4_exception exception = { };
2889 err = nfs4_handle_exception(NFS_SERVER(inode),
2890 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2892 } while (exception.retry);
2897 * This is just for mknod. open(O_CREAT) will always do ->open_context().
2900 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2903 struct nfs_open_context *ctx;
2904 struct nfs4_state *state;
2907 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2909 return PTR_ERR(ctx);
2911 sattr->ia_mode &= ~current_umask();
2912 state = nfs4_do_open(dir, dentry, ctx->mode,
2913 flags, sattr, ctx->cred,
2914 &ctx->mdsthreshold);
2916 if (IS_ERR(state)) {
2917 status = PTR_ERR(state);
2920 d_add(dentry, igrab(state->inode));
2921 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2924 put_nfs_open_context(ctx);
2928 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2930 struct nfs_server *server = NFS_SERVER(dir);
2931 struct nfs_removeargs args = {
2935 struct nfs_removeres res = {
2938 struct rpc_message msg = {
2939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2945 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2947 update_changeattr(dir, &res.cinfo);
2951 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2953 struct nfs4_exception exception = { };
2956 err = nfs4_handle_exception(NFS_SERVER(dir),
2957 _nfs4_proc_remove(dir, name),
2959 } while (exception.retry);
2963 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2965 struct nfs_server *server = NFS_SERVER(dir);
2966 struct nfs_removeargs *args = msg->rpc_argp;
2967 struct nfs_removeres *res = msg->rpc_resp;
2969 res->server = server;
2970 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2971 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2974 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2976 nfs4_setup_sequence(NFS_SERVER(data->dir),
2977 &data->args.seq_args,
2982 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2984 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2986 if (!nfs4_sequence_done(task, &res->seq_res))
2988 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2990 update_changeattr(dir, &res->cinfo);
2994 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2996 struct nfs_server *server = NFS_SERVER(dir);
2997 struct nfs_renameargs *arg = msg->rpc_argp;
2998 struct nfs_renameres *res = msg->rpc_resp;
3000 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3001 res->server = server;
3002 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
3005 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3007 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3008 &data->args.seq_args,
3013 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3014 struct inode *new_dir)
3016 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3018 if (!nfs4_sequence_done(task, &res->seq_res))
3020 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3023 update_changeattr(old_dir, &res->old_cinfo);
3024 update_changeattr(new_dir, &res->new_cinfo);
3028 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3029 struct inode *new_dir, struct qstr *new_name)
3031 struct nfs_server *server = NFS_SERVER(old_dir);
3032 struct nfs_renameargs arg = {
3033 .old_dir = NFS_FH(old_dir),
3034 .new_dir = NFS_FH(new_dir),
3035 .old_name = old_name,
3036 .new_name = new_name,
3038 struct nfs_renameres res = {
3041 struct rpc_message msg = {
3042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3046 int status = -ENOMEM;
3048 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3050 update_changeattr(old_dir, &res.old_cinfo);
3051 update_changeattr(new_dir, &res.new_cinfo);
3056 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3057 struct inode *new_dir, struct qstr *new_name)
3059 struct nfs4_exception exception = { };
3062 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3063 _nfs4_proc_rename(old_dir, old_name,
3066 } while (exception.retry);
3070 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3072 struct nfs_server *server = NFS_SERVER(inode);
3073 struct nfs4_link_arg arg = {
3074 .fh = NFS_FH(inode),
3075 .dir_fh = NFS_FH(dir),
3077 .bitmask = server->attr_bitmask,
3079 struct nfs4_link_res res = {
3082 struct rpc_message msg = {
3083 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3087 int status = -ENOMEM;
3089 res.fattr = nfs_alloc_fattr();
3090 if (res.fattr == NULL)
3093 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3095 update_changeattr(dir, &res.cinfo);
3096 nfs_post_op_update_inode(inode, res.fattr);
3099 nfs_free_fattr(res.fattr);
3103 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3105 struct nfs4_exception exception = { };
3108 err = nfs4_handle_exception(NFS_SERVER(inode),
3109 _nfs4_proc_link(inode, dir, name),
3111 } while (exception.retry);
3115 struct nfs4_createdata {
3116 struct rpc_message msg;
3117 struct nfs4_create_arg arg;
3118 struct nfs4_create_res res;
3120 struct nfs_fattr fattr;
3123 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3124 struct qstr *name, struct iattr *sattr, u32 ftype)
3126 struct nfs4_createdata *data;
3128 data = kzalloc(sizeof(*data), GFP_KERNEL);
3130 struct nfs_server *server = NFS_SERVER(dir);
3132 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3133 data->msg.rpc_argp = &data->arg;
3134 data->msg.rpc_resp = &data->res;
3135 data->arg.dir_fh = NFS_FH(dir);
3136 data->arg.server = server;
3137 data->arg.name = name;
3138 data->arg.attrs = sattr;
3139 data->arg.ftype = ftype;
3140 data->arg.bitmask = server->attr_bitmask;
3141 data->res.server = server;
3142 data->res.fh = &data->fh;
3143 data->res.fattr = &data->fattr;
3144 nfs_fattr_init(data->res.fattr);
3149 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3151 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3152 &data->arg.seq_args, &data->res.seq_res, 1);
3154 update_changeattr(dir, &data->res.dir_cinfo);
3155 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3160 static void nfs4_free_createdata(struct nfs4_createdata *data)
3165 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3166 struct page *page, unsigned int len, struct iattr *sattr)
3168 struct nfs4_createdata *data;
3169 int status = -ENAMETOOLONG;
3171 if (len > NFS4_MAXPATHLEN)
3175 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3179 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3180 data->arg.u.symlink.pages = &page;
3181 data->arg.u.symlink.len = len;
3183 status = nfs4_do_create(dir, dentry, data);
3185 nfs4_free_createdata(data);
3190 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3191 struct page *page, unsigned int len, struct iattr *sattr)
3193 struct nfs4_exception exception = { };
3196 err = nfs4_handle_exception(NFS_SERVER(dir),
3197 _nfs4_proc_symlink(dir, dentry, page,
3200 } while (exception.retry);
3204 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3205 struct iattr *sattr)
3207 struct nfs4_createdata *data;
3208 int status = -ENOMEM;
3210 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3214 status = nfs4_do_create(dir, dentry, data);
3216 nfs4_free_createdata(data);
3221 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3222 struct iattr *sattr)
3224 struct nfs4_exception exception = { };
3227 sattr->ia_mode &= ~current_umask();
3229 err = nfs4_handle_exception(NFS_SERVER(dir),
3230 _nfs4_proc_mkdir(dir, dentry, sattr),
3232 } while (exception.retry);
3236 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3237 u64 cookie, struct page **pages, unsigned int count, int plus)
3239 struct inode *dir = dentry->d_inode;
3240 struct nfs4_readdir_arg args = {
3245 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3248 struct nfs4_readdir_res res;
3249 struct rpc_message msg = {
3250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3257 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3258 dentry->d_parent->d_name.name,
3259 dentry->d_name.name,
3260 (unsigned long long)cookie);
3261 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3262 res.pgbase = args.pgbase;
3263 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3265 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3266 status += args.pgbase;
3269 nfs_invalidate_atime(dir);
3271 dprintk("%s: returns %d\n", __func__, status);
3275 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3276 u64 cookie, struct page **pages, unsigned int count, int plus)
3278 struct nfs4_exception exception = { };
3281 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3282 _nfs4_proc_readdir(dentry, cred, cookie,
3283 pages, count, plus),
3285 } while (exception.retry);
3289 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3290 struct iattr *sattr, dev_t rdev)
3292 struct nfs4_createdata *data;
3293 int mode = sattr->ia_mode;
3294 int status = -ENOMEM;
3296 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3301 data->arg.ftype = NF4FIFO;
3302 else if (S_ISBLK(mode)) {
3303 data->arg.ftype = NF4BLK;
3304 data->arg.u.device.specdata1 = MAJOR(rdev);
3305 data->arg.u.device.specdata2 = MINOR(rdev);
3307 else if (S_ISCHR(mode)) {
3308 data->arg.ftype = NF4CHR;
3309 data->arg.u.device.specdata1 = MAJOR(rdev);
3310 data->arg.u.device.specdata2 = MINOR(rdev);
3311 } else if (!S_ISSOCK(mode)) {
3316 status = nfs4_do_create(dir, dentry, data);
3318 nfs4_free_createdata(data);
3323 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3324 struct iattr *sattr, dev_t rdev)
3326 struct nfs4_exception exception = { };
3329 sattr->ia_mode &= ~current_umask();
3331 err = nfs4_handle_exception(NFS_SERVER(dir),
3332 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3334 } while (exception.retry);
3338 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3339 struct nfs_fsstat *fsstat)
3341 struct nfs4_statfs_arg args = {
3343 .bitmask = server->attr_bitmask,
3345 struct nfs4_statfs_res res = {
3348 struct rpc_message msg = {
3349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3354 nfs_fattr_init(fsstat->fattr);
3355 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3358 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3360 struct nfs4_exception exception = { };
3363 err = nfs4_handle_exception(server,
3364 _nfs4_proc_statfs(server, fhandle, fsstat),
3366 } while (exception.retry);
3370 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3371 struct nfs_fsinfo *fsinfo)
3373 struct nfs4_fsinfo_arg args = {
3375 .bitmask = server->attr_bitmask,
3377 struct nfs4_fsinfo_res res = {
3380 struct rpc_message msg = {
3381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3386 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3389 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3391 struct nfs4_exception exception = { };
3395 err = nfs4_handle_exception(server,
3396 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3398 } while (exception.retry);
3402 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3406 nfs_fattr_init(fsinfo->fattr);
3407 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3409 /* block layout checks this! */
3410 server->pnfs_blksize = fsinfo->blksize;
3411 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3417 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3418 struct nfs_pathconf *pathconf)
3420 struct nfs4_pathconf_arg args = {
3422 .bitmask = server->attr_bitmask,
3424 struct nfs4_pathconf_res res = {
3425 .pathconf = pathconf,
3427 struct rpc_message msg = {
3428 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3433 /* None of the pathconf attributes are mandatory to implement */
3434 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3435 memset(pathconf, 0, sizeof(*pathconf));
3439 nfs_fattr_init(pathconf->fattr);
3440 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3443 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3444 struct nfs_pathconf *pathconf)
3446 struct nfs4_exception exception = { };
3450 err = nfs4_handle_exception(server,
3451 _nfs4_proc_pathconf(server, fhandle, pathconf),
3453 } while (exception.retry);
3457 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
3458 const struct nfs_open_context *ctx,
3459 const struct nfs_lock_context *l_ctx,
3462 const struct nfs_lockowner *lockowner = NULL;
3465 lockowner = &l_ctx->lockowner;
3466 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
3468 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3470 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3471 const struct nfs_open_context *ctx,
3472 const struct nfs_lock_context *l_ctx,
3475 nfs4_stateid current_stateid;
3477 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode))
3479 return nfs4_stateid_match(stateid, ¤t_stateid);
3482 static bool nfs4_error_stateid_expired(int err)
3485 case -NFS4ERR_DELEG_REVOKED:
3486 case -NFS4ERR_ADMIN_REVOKED:
3487 case -NFS4ERR_BAD_STATEID:
3488 case -NFS4ERR_STALE_STATEID:
3489 case -NFS4ERR_OLD_STATEID:
3490 case -NFS4ERR_OPENMODE:
3491 case -NFS4ERR_EXPIRED:
3497 void __nfs4_read_done_cb(struct nfs_read_data *data)
3499 nfs_invalidate_atime(data->header->inode);
3502 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3504 struct nfs_server *server = NFS_SERVER(data->header->inode);
3506 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3507 rpc_restart_call_prepare(task);
3511 __nfs4_read_done_cb(data);
3512 if (task->tk_status > 0)
3513 renew_lease(server, data->timestamp);
3517 static bool nfs4_read_stateid_changed(struct rpc_task *task,
3518 struct nfs_readargs *args)
3521 if (!nfs4_error_stateid_expired(task->tk_status) ||
3522 nfs4_stateid_is_current(&args->stateid,
3527 rpc_restart_call_prepare(task);
3531 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3534 dprintk("--> %s\n", __func__);
3536 if (!nfs4_sequence_done(task, &data->res.seq_res))
3538 if (nfs4_read_stateid_changed(task, &data->args))
3540 return data->read_done_cb ? data->read_done_cb(task, data) :
3541 nfs4_read_done_cb(task, data);
3544 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3546 data->timestamp = jiffies;
3547 data->read_done_cb = nfs4_read_done_cb;
3548 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3549 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3552 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3554 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3555 &data->args.seq_args,
3559 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3560 data->args.lock_context, FMODE_READ);
3563 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3565 struct inode *inode = data->header->inode;
3567 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3568 rpc_restart_call_prepare(task);
3571 if (task->tk_status >= 0) {
3572 renew_lease(NFS_SERVER(inode), data->timestamp);
3573 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3578 static bool nfs4_write_stateid_changed(struct rpc_task *task,
3579 struct nfs_writeargs *args)
3582 if (!nfs4_error_stateid_expired(task->tk_status) ||
3583 nfs4_stateid_is_current(&args->stateid,
3588 rpc_restart_call_prepare(task);
3592 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3594 if (!nfs4_sequence_done(task, &data->res.seq_res))
3596 if (nfs4_write_stateid_changed(task, &data->args))
3598 return data->write_done_cb ? data->write_done_cb(task, data) :
3599 nfs4_write_done_cb(task, data);
3603 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3605 const struct nfs_pgio_header *hdr = data->header;
3607 /* Don't request attributes for pNFS or O_DIRECT writes */
3608 if (data->ds_clp != NULL || hdr->dreq != NULL)
3610 /* Otherwise, request attributes if and only if we don't hold
3613 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3616 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3618 struct nfs_server *server = NFS_SERVER(data->header->inode);
3620 if (!nfs4_write_need_cache_consistency_data(data)) {
3621 data->args.bitmask = NULL;
3622 data->res.fattr = NULL;
3624 data->args.bitmask = server->cache_consistency_bitmask;
3626 if (!data->write_done_cb)
3627 data->write_done_cb = nfs4_write_done_cb;
3628 data->res.server = server;
3629 data->timestamp = jiffies;
3631 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3632 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3635 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3637 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3638 &data->args.seq_args,
3642 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3643 data->args.lock_context, FMODE_WRITE);
3646 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3648 nfs4_setup_sequence(NFS_SERVER(data->inode),
3649 &data->args.seq_args,
3654 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3656 struct inode *inode = data->inode;
3658 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3659 rpc_restart_call_prepare(task);
3665 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3667 if (!nfs4_sequence_done(task, &data->res.seq_res))
3669 return data->commit_done_cb(task, data);
3672 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3674 struct nfs_server *server = NFS_SERVER(data->inode);
3676 if (data->commit_done_cb == NULL)
3677 data->commit_done_cb = nfs4_commit_done_cb;
3678 data->res.server = server;
3679 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3680 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3683 struct nfs4_renewdata {
3684 struct nfs_client *client;
3685 unsigned long timestamp;
3689 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3690 * standalone procedure for queueing an asynchronous RENEW.
3692 static void nfs4_renew_release(void *calldata)
3694 struct nfs4_renewdata *data = calldata;
3695 struct nfs_client *clp = data->client;
3697 if (atomic_read(&clp->cl_count) > 1)
3698 nfs4_schedule_state_renewal(clp);
3699 nfs_put_client(clp);
3703 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3705 struct nfs4_renewdata *data = calldata;
3706 struct nfs_client *clp = data->client;
3707 unsigned long timestamp = data->timestamp;
3709 if (task->tk_status < 0) {
3710 /* Unless we're shutting down, schedule state recovery! */
3711 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3713 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3714 nfs4_schedule_lease_recovery(clp);
3717 nfs4_schedule_path_down_recovery(clp);
3719 do_renew_lease(clp, timestamp);
3722 static const struct rpc_call_ops nfs4_renew_ops = {
3723 .rpc_call_done = nfs4_renew_done,
3724 .rpc_release = nfs4_renew_release,
3727 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3729 struct rpc_message msg = {
3730 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3734 struct nfs4_renewdata *data;
3736 if (renew_flags == 0)
3738 if (!atomic_inc_not_zero(&clp->cl_count))
3740 data = kmalloc(sizeof(*data), GFP_NOFS);
3744 data->timestamp = jiffies;
3745 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3746 &nfs4_renew_ops, data);
3749 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3751 struct rpc_message msg = {
3752 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3756 unsigned long now = jiffies;
3759 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3762 do_renew_lease(clp, now);
3766 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3768 return (server->caps & NFS_CAP_ACLS)
3769 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3770 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3773 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3774 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3777 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3779 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3780 struct page **pages, unsigned int *pgbase)
3782 struct page *newpage, **spages;
3788 len = min_t(size_t, PAGE_SIZE, buflen);
3789 newpage = alloc_page(GFP_KERNEL);
3791 if (newpage == NULL)
3793 memcpy(page_address(newpage), buf, len);
3798 } while (buflen != 0);
3804 __free_page(spages[rc-1]);
3808 struct nfs4_cached_acl {
3814 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3816 struct nfs_inode *nfsi = NFS_I(inode);
3818 spin_lock(&inode->i_lock);
3819 kfree(nfsi->nfs4_acl);
3820 nfsi->nfs4_acl = acl;
3821 spin_unlock(&inode->i_lock);
3824 static void nfs4_zap_acl_attr(struct inode *inode)
3826 nfs4_set_cached_acl(inode, NULL);
3829 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3831 struct nfs_inode *nfsi = NFS_I(inode);
3832 struct nfs4_cached_acl *acl;
3835 spin_lock(&inode->i_lock);
3836 acl = nfsi->nfs4_acl;
3839 if (buf == NULL) /* user is just asking for length */
3841 if (acl->cached == 0)
3843 ret = -ERANGE; /* see getxattr(2) man page */
3844 if (acl->len > buflen)
3846 memcpy(buf, acl->data, acl->len);
3850 spin_unlock(&inode->i_lock);
3854 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3856 struct nfs4_cached_acl *acl;
3857 size_t buflen = sizeof(*acl) + acl_len;
3859 if (buflen <= PAGE_SIZE) {
3860 acl = kmalloc(buflen, GFP_KERNEL);
3864 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3866 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3873 nfs4_set_cached_acl(inode, acl);
3877 * The getxattr API returns the required buffer length when called with a
3878 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3879 * the required buf. On a NULL buf, we send a page of data to the server
3880 * guessing that the ACL request can be serviced by a page. If so, we cache
3881 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3882 * the cache. If not so, we throw away the page, and cache the required
3883 * length. The next getxattr call will then produce another round trip to
3884 * the server, this time with the input buf of the required size.
3886 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3888 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3889 struct nfs_getaclargs args = {
3890 .fh = NFS_FH(inode),
3894 struct nfs_getaclres res = {
3897 struct rpc_message msg = {
3898 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3902 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3903 int ret = -ENOMEM, i;
3905 /* As long as we're doing a round trip to the server anyway,
3906 * let's be prepared for a page of acl data. */
3909 if (npages > ARRAY_SIZE(pages))
3912 for (i = 0; i < npages; i++) {
3913 pages[i] = alloc_page(GFP_KERNEL);
3918 /* for decoding across pages */
3919 res.acl_scratch = alloc_page(GFP_KERNEL);
3920 if (!res.acl_scratch)
3923 args.acl_len = npages * PAGE_SIZE;
3924 args.acl_pgbase = 0;
3926 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3927 __func__, buf, buflen, npages, args.acl_len);
3928 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3929 &msg, &args.seq_args, &res.seq_res, 0);
3933 /* Handle the case where the passed-in buffer is too short */
3934 if (res.acl_flags & NFS4_ACL_TRUNC) {
3935 /* Did the user only issue a request for the acl length? */
3941 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3943 if (res.acl_len > buflen) {
3947 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3952 for (i = 0; i < npages; i++)
3954 __free_page(pages[i]);
3955 if (res.acl_scratch)
3956 __free_page(res.acl_scratch);
3960 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3962 struct nfs4_exception exception = { };
3965 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3968 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3969 } while (exception.retry);
3973 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3975 struct nfs_server *server = NFS_SERVER(inode);
3978 if (!nfs4_server_supports_acls(server))
3980 ret = nfs_revalidate_inode(server, inode);
3983 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3984 nfs_zap_acl_cache(inode);
3985 ret = nfs4_read_cached_acl(inode, buf, buflen);
3987 /* -ENOENT is returned if there is no ACL or if there is an ACL
3988 * but no cached acl data, just the acl length */
3990 return nfs4_get_acl_uncached(inode, buf, buflen);
3993 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3995 struct nfs_server *server = NFS_SERVER(inode);
3996 struct page *pages[NFS4ACL_MAXPAGES];
3997 struct nfs_setaclargs arg = {
3998 .fh = NFS_FH(inode),
4002 struct nfs_setaclres res;
4003 struct rpc_message msg = {
4004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4008 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4011 if (!nfs4_server_supports_acls(server))
4013 if (npages > ARRAY_SIZE(pages))
4015 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4018 nfs4_inode_return_delegation(inode);
4019 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4022 * Free each page after tx, so the only ref left is
4023 * held by the network stack
4026 put_page(pages[i-1]);
4029 * Acl update can result in inode attribute update.
4030 * so mark the attribute cache invalid.
4032 spin_lock(&inode->i_lock);
4033 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4034 spin_unlock(&inode->i_lock);
4035 nfs_access_zap_cache(inode);
4036 nfs_zap_acl_cache(inode);
4040 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4042 struct nfs4_exception exception = { };
4045 err = nfs4_handle_exception(NFS_SERVER(inode),
4046 __nfs4_proc_set_acl(inode, buf, buflen),
4048 } while (exception.retry);
4053 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
4055 struct nfs_client *clp = server->nfs_client;
4057 if (task->tk_status >= 0)
4059 switch(task->tk_status) {
4060 case -NFS4ERR_DELEG_REVOKED:
4061 case -NFS4ERR_ADMIN_REVOKED:
4062 case -NFS4ERR_BAD_STATEID:
4065 nfs_remove_bad_delegation(state->inode);
4066 case -NFS4ERR_OPENMODE:
4069 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4070 goto stateid_invalid;
4071 goto wait_on_recovery;
4072 case -NFS4ERR_EXPIRED:
4073 if (state != NULL) {
4074 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4075 goto stateid_invalid;
4077 case -NFS4ERR_STALE_STATEID:
4078 case -NFS4ERR_STALE_CLIENTID:
4079 nfs4_schedule_lease_recovery(clp);
4080 goto wait_on_recovery;
4081 #if defined(CONFIG_NFS_V4_1)
4082 case -NFS4ERR_BADSESSION:
4083 case -NFS4ERR_BADSLOT:
4084 case -NFS4ERR_BAD_HIGH_SLOT:
4085 case -NFS4ERR_DEADSESSION:
4086 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4087 case -NFS4ERR_SEQ_FALSE_RETRY:
4088 case -NFS4ERR_SEQ_MISORDERED:
4089 dprintk("%s ERROR %d, Reset session\n", __func__,
4091 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4092 task->tk_status = 0;
4094 #endif /* CONFIG_NFS_V4_1 */
4095 case -NFS4ERR_DELAY:
4096 nfs_inc_server_stats(server, NFSIOS_DELAY);
4097 case -NFS4ERR_GRACE:
4098 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4099 task->tk_status = 0;
4101 case -NFS4ERR_RETRY_UNCACHED_REP:
4102 case -NFS4ERR_OLD_STATEID:
4103 task->tk_status = 0;
4106 task->tk_status = nfs4_map_errors(task->tk_status);
4109 task->tk_status = -EIO;
4112 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4113 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4114 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4115 task->tk_status = 0;
4119 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4120 nfs4_verifier *bootverf)
4124 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4125 /* An impossible timestamp guarantees this value
4126 * will never match a generated boot time. */
4128 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4130 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4131 verf[0] = (__be32)nn->boot_time.tv_sec;
4132 verf[1] = (__be32)nn->boot_time.tv_nsec;
4134 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4138 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4139 char *buf, size_t len)
4141 unsigned int result;
4144 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4146 rpc_peeraddr2str(clp->cl_rpcclient,
4148 rpc_peeraddr2str(clp->cl_rpcclient,
4149 RPC_DISPLAY_PROTO));
4155 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4156 char *buf, size_t len)
4158 char *nodename = clp->cl_rpcclient->cl_nodename;
4160 if (nfs4_client_id_uniquifier[0] != '\0')
4161 nodename = nfs4_client_id_uniquifier;
4162 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4163 clp->rpc_ops->version, clp->cl_minorversion,
4168 * nfs4_proc_setclientid - Negotiate client ID
4169 * @clp: state data structure
4170 * @program: RPC program for NFSv4 callback service
4171 * @port: IP port number for NFS4 callback service
4172 * @cred: RPC credential to use for this call
4173 * @res: where to place the result
4175 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4177 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4178 unsigned short port, struct rpc_cred *cred,
4179 struct nfs4_setclientid_res *res)
4181 nfs4_verifier sc_verifier;
4182 struct nfs4_setclientid setclientid = {
4183 .sc_verifier = &sc_verifier,
4185 .sc_cb_ident = clp->cl_cb_ident,
4187 struct rpc_message msg = {
4188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4189 .rpc_argp = &setclientid,
4195 /* nfs_client_id4 */
4196 nfs4_init_boot_verifier(clp, &sc_verifier);
4197 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4198 setclientid.sc_name_len =
4199 nfs4_init_uniform_client_string(clp,
4200 setclientid.sc_name,
4201 sizeof(setclientid.sc_name));
4203 setclientid.sc_name_len =
4204 nfs4_init_nonuniform_client_string(clp,
4205 setclientid.sc_name,
4206 sizeof(setclientid.sc_name));
4209 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4210 sizeof(setclientid.sc_netid),
4211 rpc_peeraddr2str(clp->cl_rpcclient,
4212 RPC_DISPLAY_NETID));
4214 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4215 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4216 clp->cl_ipaddr, port >> 8, port & 255);
4218 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4219 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4220 setclientid.sc_name_len, setclientid.sc_name);
4221 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4222 dprintk("NFS reply setclientid: %d\n", status);
4227 * nfs4_proc_setclientid_confirm - Confirm client ID
4228 * @clp: state data structure
4229 * @res: result of a previous SETCLIENTID
4230 * @cred: RPC credential to use for this call
4232 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4234 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4235 struct nfs4_setclientid_res *arg,
4236 struct rpc_cred *cred)
4238 struct nfs_fsinfo fsinfo;
4239 struct rpc_message msg = {
4240 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4242 .rpc_resp = &fsinfo,
4248 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4249 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4252 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4254 spin_lock(&clp->cl_lock);
4255 clp->cl_lease_time = fsinfo.lease_time * HZ;
4256 clp->cl_last_renewal = now;
4257 spin_unlock(&clp->cl_lock);
4259 dprintk("NFS reply setclientid_confirm: %d\n", status);
4263 struct nfs4_delegreturndata {
4264 struct nfs4_delegreturnargs args;
4265 struct nfs4_delegreturnres res;
4267 nfs4_stateid stateid;
4268 unsigned long timestamp;
4269 struct nfs_fattr fattr;
4273 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4275 struct nfs4_delegreturndata *data = calldata;
4277 if (!nfs4_sequence_done(task, &data->res.seq_res))
4280 switch (task->tk_status) {
4281 case -NFS4ERR_STALE_STATEID:
4282 case -NFS4ERR_EXPIRED:
4284 renew_lease(data->res.server, data->timestamp);
4287 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4289 rpc_restart_call_prepare(task);
4293 data->rpc_status = task->tk_status;
4296 static void nfs4_delegreturn_release(void *calldata)
4301 #if defined(CONFIG_NFS_V4_1)
4302 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4304 struct nfs4_delegreturndata *d_data;
4306 d_data = (struct nfs4_delegreturndata *)data;
4308 nfs4_setup_sequence(d_data->res.server,
4309 &d_data->args.seq_args,
4310 &d_data->res.seq_res,
4313 #endif /* CONFIG_NFS_V4_1 */
4315 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4316 #if defined(CONFIG_NFS_V4_1)
4317 .rpc_call_prepare = nfs4_delegreturn_prepare,
4318 #endif /* CONFIG_NFS_V4_1 */
4319 .rpc_call_done = nfs4_delegreturn_done,
4320 .rpc_release = nfs4_delegreturn_release,
4323 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4325 struct nfs4_delegreturndata *data;
4326 struct nfs_server *server = NFS_SERVER(inode);
4327 struct rpc_task *task;
4328 struct rpc_message msg = {
4329 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4332 struct rpc_task_setup task_setup_data = {
4333 .rpc_client = server->client,
4334 .rpc_message = &msg,
4335 .callback_ops = &nfs4_delegreturn_ops,
4336 .flags = RPC_TASK_ASYNC,
4340 data = kzalloc(sizeof(*data), GFP_NOFS);
4343 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4344 data->args.fhandle = &data->fh;
4345 data->args.stateid = &data->stateid;
4346 data->args.bitmask = server->cache_consistency_bitmask;
4347 nfs_copy_fh(&data->fh, NFS_FH(inode));
4348 nfs4_stateid_copy(&data->stateid, stateid);
4349 data->res.fattr = &data->fattr;
4350 data->res.server = server;
4351 nfs_fattr_init(data->res.fattr);
4352 data->timestamp = jiffies;
4353 data->rpc_status = 0;
4355 task_setup_data.callback_data = data;
4356 msg.rpc_argp = &data->args;
4357 msg.rpc_resp = &data->res;
4358 task = rpc_run_task(&task_setup_data);
4360 return PTR_ERR(task);
4363 status = nfs4_wait_for_completion_rpc_task(task);
4366 status = data->rpc_status;
4368 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4370 nfs_refresh_inode(inode, &data->fattr);
4376 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4378 struct nfs_server *server = NFS_SERVER(inode);
4379 struct nfs4_exception exception = { };
4382 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4384 case -NFS4ERR_STALE_STATEID:
4385 case -NFS4ERR_EXPIRED:
4389 err = nfs4_handle_exception(server, err, &exception);
4390 } while (exception.retry);
4394 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4395 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4398 * sleep, with exponential backoff, and retry the LOCK operation.
4400 static unsigned long
4401 nfs4_set_lock_task_retry(unsigned long timeout)
4403 freezable_schedule_timeout_killable(timeout);
4405 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4406 return NFS4_LOCK_MAXTIMEOUT;
4410 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4412 struct inode *inode = state->inode;
4413 struct nfs_server *server = NFS_SERVER(inode);
4414 struct nfs_client *clp = server->nfs_client;
4415 struct nfs_lockt_args arg = {
4416 .fh = NFS_FH(inode),
4419 struct nfs_lockt_res res = {
4422 struct rpc_message msg = {
4423 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4426 .rpc_cred = state->owner->so_cred,
4428 struct nfs4_lock_state *lsp;
4431 arg.lock_owner.clientid = clp->cl_clientid;
4432 status = nfs4_set_lock_state(state, request);
4435 lsp = request->fl_u.nfs4_fl.owner;
4436 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4437 arg.lock_owner.s_dev = server->s_dev;
4438 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4441 request->fl_type = F_UNLCK;
4443 case -NFS4ERR_DENIED:
4446 request->fl_ops->fl_release_private(request);
4451 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4453 struct nfs4_exception exception = { };
4457 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4458 _nfs4_proc_getlk(state, cmd, request),
4460 } while (exception.retry);
4464 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4467 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4469 res = posix_lock_file_wait(file, fl);
4472 res = flock_lock_file_wait(file, fl);
4480 struct nfs4_unlockdata {
4481 struct nfs_locku_args arg;
4482 struct nfs_locku_res res;
4483 struct nfs4_lock_state *lsp;
4484 struct nfs_open_context *ctx;
4485 struct file_lock fl;
4486 const struct nfs_server *server;
4487 unsigned long timestamp;
4490 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4491 struct nfs_open_context *ctx,
4492 struct nfs4_lock_state *lsp,
4493 struct nfs_seqid *seqid)
4495 struct nfs4_unlockdata *p;
4496 struct inode *inode = lsp->ls_state->inode;
4498 p = kzalloc(sizeof(*p), GFP_NOFS);
4501 p->arg.fh = NFS_FH(inode);
4503 p->arg.seqid = seqid;
4504 p->res.seqid = seqid;
4505 p->arg.stateid = &lsp->ls_stateid;
4507 atomic_inc(&lsp->ls_count);
4508 /* Ensure we don't close file until we're done freeing locks! */
4509 p->ctx = get_nfs_open_context(ctx);
4510 memcpy(&p->fl, fl, sizeof(p->fl));
4511 p->server = NFS_SERVER(inode);
4515 static void nfs4_locku_release_calldata(void *data)
4517 struct nfs4_unlockdata *calldata = data;
4518 nfs_free_seqid(calldata->arg.seqid);
4519 nfs4_put_lock_state(calldata->lsp);
4520 put_nfs_open_context(calldata->ctx);
4524 static void nfs4_locku_done(struct rpc_task *task, void *data)
4526 struct nfs4_unlockdata *calldata = data;
4528 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4530 switch (task->tk_status) {
4532 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4533 &calldata->res.stateid);
4534 renew_lease(calldata->server, calldata->timestamp);
4536 case -NFS4ERR_BAD_STATEID:
4537 case -NFS4ERR_OLD_STATEID:
4538 case -NFS4ERR_STALE_STATEID:
4539 case -NFS4ERR_EXPIRED:
4542 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4543 rpc_restart_call_prepare(task);
4545 nfs_release_seqid(calldata->arg.seqid);
4548 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4550 struct nfs4_unlockdata *calldata = data;
4552 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4554 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
4555 /* Note: exit _without_ running nfs4_locku_done */
4558 calldata->timestamp = jiffies;
4559 if (nfs4_setup_sequence(calldata->server,
4560 &calldata->arg.seq_args,
4561 &calldata->res.seq_res,
4563 nfs_release_seqid(calldata->arg.seqid);
4566 task->tk_action = NULL;
4568 nfs4_sequence_done(task, &calldata->res.seq_res);
4571 static const struct rpc_call_ops nfs4_locku_ops = {
4572 .rpc_call_prepare = nfs4_locku_prepare,
4573 .rpc_call_done = nfs4_locku_done,
4574 .rpc_release = nfs4_locku_release_calldata,
4577 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4578 struct nfs_open_context *ctx,
4579 struct nfs4_lock_state *lsp,
4580 struct nfs_seqid *seqid)
4582 struct nfs4_unlockdata *data;
4583 struct rpc_message msg = {
4584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4585 .rpc_cred = ctx->cred,
4587 struct rpc_task_setup task_setup_data = {
4588 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4589 .rpc_message = &msg,
4590 .callback_ops = &nfs4_locku_ops,
4591 .workqueue = nfsiod_workqueue,
4592 .flags = RPC_TASK_ASYNC,
4595 /* Ensure this is an unlock - when canceling a lock, the
4596 * canceled lock is passed in, and it won't be an unlock.
4598 fl->fl_type = F_UNLCK;
4600 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4602 nfs_free_seqid(seqid);
4603 return ERR_PTR(-ENOMEM);
4606 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4607 msg.rpc_argp = &data->arg;
4608 msg.rpc_resp = &data->res;
4609 task_setup_data.callback_data = data;
4610 return rpc_run_task(&task_setup_data);
4613 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4615 struct inode *inode = state->inode;
4616 struct nfs4_state_owner *sp = state->owner;
4617 struct nfs_inode *nfsi = NFS_I(inode);
4618 struct nfs_seqid *seqid;
4619 struct nfs4_lock_state *lsp;
4620 struct rpc_task *task;
4622 unsigned char fl_flags = request->fl_flags;
4624 status = nfs4_set_lock_state(state, request);
4625 /* Unlock _before_ we do the RPC call */
4626 request->fl_flags |= FL_EXISTS;
4627 /* Exclude nfs_delegation_claim_locks() */
4628 mutex_lock(&sp->so_delegreturn_mutex);
4629 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
4630 down_read(&nfsi->rwsem);
4631 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4632 up_read(&nfsi->rwsem);
4633 mutex_unlock(&sp->so_delegreturn_mutex);
4636 up_read(&nfsi->rwsem);
4637 mutex_unlock(&sp->so_delegreturn_mutex);
4640 /* Is this a delegated lock? */
4641 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4643 lsp = request->fl_u.nfs4_fl.owner;
4644 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4648 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4649 status = PTR_ERR(task);
4652 status = nfs4_wait_for_completion_rpc_task(task);
4655 request->fl_flags = fl_flags;
4659 struct nfs4_lockdata {
4660 struct nfs_lock_args arg;
4661 struct nfs_lock_res res;
4662 struct nfs4_lock_state *lsp;
4663 struct nfs_open_context *ctx;
4664 struct file_lock fl;
4665 unsigned long timestamp;
4668 struct nfs_server *server;
4671 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4672 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4675 struct nfs4_lockdata *p;
4676 struct inode *inode = lsp->ls_state->inode;
4677 struct nfs_server *server = NFS_SERVER(inode);
4679 p = kzalloc(sizeof(*p), gfp_mask);
4683 p->arg.fh = NFS_FH(inode);
4685 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4686 if (p->arg.open_seqid == NULL)
4688 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4689 if (p->arg.lock_seqid == NULL)
4690 goto out_free_seqid;
4691 p->arg.lock_stateid = &lsp->ls_stateid;
4692 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4693 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4694 p->arg.lock_owner.s_dev = server->s_dev;
4695 p->res.lock_seqid = p->arg.lock_seqid;
4698 atomic_inc(&lsp->ls_count);
4699 p->ctx = get_nfs_open_context(ctx);
4700 memcpy(&p->fl, fl, sizeof(p->fl));
4703 nfs_free_seqid(p->arg.open_seqid);
4709 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4711 struct nfs4_lockdata *data = calldata;
4712 struct nfs4_state *state = data->lsp->ls_state;
4714 dprintk("%s: begin!\n", __func__);
4715 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4717 /* Do we need to do an open_to_lock_owner? */
4718 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4719 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
4720 goto out_release_lock_seqid;
4722 data->arg.open_stateid = &state->stateid;
4723 data->arg.new_lock_owner = 1;
4724 data->res.open_seqid = data->arg.open_seqid;
4726 data->arg.new_lock_owner = 0;
4727 if (!nfs4_valid_open_stateid(state)) {
4728 data->rpc_status = -EBADF;
4729 task->tk_action = NULL;
4730 goto out_release_open_seqid;
4732 data->timestamp = jiffies;
4733 if (nfs4_setup_sequence(data->server,
4734 &data->arg.seq_args,
4738 out_release_open_seqid:
4739 nfs_release_seqid(data->arg.open_seqid);
4740 out_release_lock_seqid:
4741 nfs_release_seqid(data->arg.lock_seqid);
4743 nfs4_sequence_done(task, &data->res.seq_res);
4744 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4747 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4749 struct nfs4_lockdata *data = calldata;
4751 dprintk("%s: begin!\n", __func__);
4753 if (!nfs4_sequence_done(task, &data->res.seq_res))
4756 data->rpc_status = task->tk_status;
4757 if (data->arg.new_lock_owner != 0) {
4758 if (data->rpc_status == 0)
4759 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4763 if (data->rpc_status == 0) {
4764 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4765 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
4766 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4769 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4772 static void nfs4_lock_release(void *calldata)
4774 struct nfs4_lockdata *data = calldata;
4776 dprintk("%s: begin!\n", __func__);
4777 nfs_free_seqid(data->arg.open_seqid);
4778 if (data->cancelled != 0) {
4779 struct rpc_task *task;
4780 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4781 data->arg.lock_seqid);
4783 rpc_put_task_async(task);
4784 dprintk("%s: cancelling lock!\n", __func__);
4786 nfs_free_seqid(data->arg.lock_seqid);
4787 nfs4_put_lock_state(data->lsp);
4788 put_nfs_open_context(data->ctx);
4790 dprintk("%s: done!\n", __func__);
4793 static const struct rpc_call_ops nfs4_lock_ops = {
4794 .rpc_call_prepare = nfs4_lock_prepare,
4795 .rpc_call_done = nfs4_lock_done,
4796 .rpc_release = nfs4_lock_release,
4799 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4802 case -NFS4ERR_ADMIN_REVOKED:
4803 case -NFS4ERR_BAD_STATEID:
4804 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4805 if (new_lock_owner != 0 ||
4806 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
4807 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4809 case -NFS4ERR_STALE_STATEID:
4810 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4811 case -NFS4ERR_EXPIRED:
4812 nfs4_schedule_lease_recovery(server->nfs_client);
4816 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4818 struct nfs4_lockdata *data;
4819 struct rpc_task *task;
4820 struct rpc_message msg = {
4821 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4822 .rpc_cred = state->owner->so_cred,
4824 struct rpc_task_setup task_setup_data = {
4825 .rpc_client = NFS_CLIENT(state->inode),
4826 .rpc_message = &msg,
4827 .callback_ops = &nfs4_lock_ops,
4828 .workqueue = nfsiod_workqueue,
4829 .flags = RPC_TASK_ASYNC,
4833 dprintk("%s: begin!\n", __func__);
4834 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4835 fl->fl_u.nfs4_fl.owner,
4836 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4840 data->arg.block = 1;
4841 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4842 msg.rpc_argp = &data->arg;
4843 msg.rpc_resp = &data->res;
4844 task_setup_data.callback_data = data;
4845 if (recovery_type > NFS_LOCK_NEW) {
4846 if (recovery_type == NFS_LOCK_RECLAIM)
4847 data->arg.reclaim = NFS_LOCK_RECLAIM;
4848 nfs4_set_sequence_privileged(&data->arg.seq_args);
4850 task = rpc_run_task(&task_setup_data);
4852 return PTR_ERR(task);
4853 ret = nfs4_wait_for_completion_rpc_task(task);
4855 ret = data->rpc_status;
4857 nfs4_handle_setlk_error(data->server, data->lsp,
4858 data->arg.new_lock_owner, ret);
4860 data->cancelled = 1;
4862 dprintk("%s: done, ret = %d!\n", __func__, ret);
4866 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4868 struct nfs_server *server = NFS_SERVER(state->inode);
4869 struct nfs4_exception exception = {
4870 .inode = state->inode,
4875 /* Cache the lock if possible... */
4876 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4878 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4879 if (err != -NFS4ERR_DELAY)
4881 nfs4_handle_exception(server, err, &exception);
4882 } while (exception.retry);
4886 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4888 struct nfs_server *server = NFS_SERVER(state->inode);
4889 struct nfs4_exception exception = {
4890 .inode = state->inode,
4894 err = nfs4_set_lock_state(state, request);
4898 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4900 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4904 case -NFS4ERR_GRACE:
4905 case -NFS4ERR_DELAY:
4906 nfs4_handle_exception(server, err, &exception);
4909 } while (exception.retry);
4914 #if defined(CONFIG_NFS_V4_1)
4916 * nfs41_check_expired_locks - possibly free a lock stateid
4918 * @state: NFSv4 state for an inode
4920 * Returns NFS_OK if recovery for this stateid is now finished.
4921 * Otherwise a negative NFS4ERR value is returned.
4923 static int nfs41_check_expired_locks(struct nfs4_state *state)
4925 int status, ret = -NFS4ERR_BAD_STATEID;
4926 struct nfs4_lock_state *lsp;
4927 struct nfs_server *server = NFS_SERVER(state->inode);
4929 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4930 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
4931 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4932 if (status != NFS_OK) {
4933 /* Free the stateid unless the server
4934 * informs us the stateid is unrecognized. */
4935 if (status != -NFS4ERR_BAD_STATEID)
4936 nfs41_free_stateid(server,
4938 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
4947 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4949 int status = NFS_OK;
4951 if (test_bit(LK_STATE_IN_USE, &state->flags))
4952 status = nfs41_check_expired_locks(state);
4953 if (status != NFS_OK)
4954 status = nfs4_lock_expired(state, request);
4959 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4961 struct nfs4_state_owner *sp = state->owner;
4962 struct nfs_inode *nfsi = NFS_I(state->inode);
4963 unsigned char fl_flags = request->fl_flags;
4965 int status = -ENOLCK;
4967 if ((fl_flags & FL_POSIX) &&
4968 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4970 /* Is this a delegated open? */
4971 status = nfs4_set_lock_state(state, request);
4974 request->fl_flags |= FL_ACCESS;
4975 status = do_vfs_lock(request->fl_file, request);
4978 down_read(&nfsi->rwsem);
4979 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4980 /* Yes: cache locks! */
4981 /* ...but avoid races with delegation recall... */
4982 request->fl_flags = fl_flags & ~FL_SLEEP;
4983 status = do_vfs_lock(request->fl_file, request);
4986 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
4987 up_read(&nfsi->rwsem);
4988 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4991 down_read(&nfsi->rwsem);
4992 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
4993 status = -NFS4ERR_DELAY;
4996 /* Note: we always want to sleep here! */
4997 request->fl_flags = fl_flags | FL_SLEEP;
4998 if (do_vfs_lock(request->fl_file, request) < 0)
4999 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5000 "manager!\n", __func__);
5002 up_read(&nfsi->rwsem);
5004 request->fl_flags = fl_flags;
5008 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5010 struct nfs4_exception exception = {
5012 .inode = state->inode,
5017 err = _nfs4_proc_setlk(state, cmd, request);
5018 if (err == -NFS4ERR_DENIED)
5020 err = nfs4_handle_exception(NFS_SERVER(state->inode),
5022 } while (exception.retry);
5027 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5029 struct nfs_open_context *ctx;
5030 struct nfs4_state *state;
5031 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5034 /* verify open state */
5035 ctx = nfs_file_open_context(filp);
5038 if (request->fl_start < 0 || request->fl_end < 0)
5041 if (IS_GETLK(cmd)) {
5043 return nfs4_proc_getlk(state, F_GETLK, request);
5047 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5050 if (request->fl_type == F_UNLCK) {
5052 return nfs4_proc_unlck(state, cmd, request);
5059 * Don't rely on the VFS having checked the file open mode,
5060 * since it won't do this for flock() locks.
5062 switch (request->fl_type) {
5064 if (!(filp->f_mode & FMODE_READ))
5068 if (!(filp->f_mode & FMODE_WRITE))
5073 status = nfs4_proc_setlk(state, cmd, request);
5074 if ((status != -EAGAIN) || IS_SETLK(cmd))
5076 timeout = nfs4_set_lock_task_retry(timeout);
5077 status = -ERESTARTSYS;
5080 } while(status < 0);
5084 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
5086 struct nfs_server *server = NFS_SERVER(state->inode);
5087 struct nfs4_exception exception = { };
5090 err = nfs4_set_lock_state(state, fl);
5094 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5097 printk(KERN_ERR "NFS: %s: unhandled error "
5098 "%d.\n", __func__, err);
5102 case -NFS4ERR_STALE_CLIENTID:
5103 case -NFS4ERR_STALE_STATEID:
5104 set_bit(NFS_DELEGATED_STATE, &state->flags);
5105 case -NFS4ERR_EXPIRED:
5106 nfs4_schedule_lease_recovery(server->nfs_client);
5109 case -NFS4ERR_BADSESSION:
5110 case -NFS4ERR_BADSLOT:
5111 case -NFS4ERR_BAD_HIGH_SLOT:
5112 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5113 case -NFS4ERR_DEADSESSION:
5114 set_bit(NFS_DELEGATED_STATE, &state->flags);
5115 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
5118 case -NFS4ERR_DELEG_REVOKED:
5119 case -NFS4ERR_ADMIN_REVOKED:
5120 case -NFS4ERR_BAD_STATEID:
5121 case -NFS4ERR_OPENMODE:
5122 nfs4_schedule_stateid_recovery(server, state);
5126 case -NFS4ERR_DENIED:
5127 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5131 set_bit(NFS_DELEGATED_STATE, &state->flags);
5132 err = nfs4_handle_exception(server, err, &exception);
5133 } while (exception.retry);
5138 struct nfs_release_lockowner_data {
5139 struct nfs4_lock_state *lsp;
5140 struct nfs_server *server;
5141 struct nfs_release_lockowner_args args;
5144 static void nfs4_release_lockowner_release(void *calldata)
5146 struct nfs_release_lockowner_data *data = calldata;
5147 nfs4_free_lock_state(data->server, data->lsp);
5151 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5152 .rpc_release = nfs4_release_lockowner_release,
5155 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
5157 struct nfs_server *server = lsp->ls_state->owner->so_server;
5158 struct nfs_release_lockowner_data *data;
5159 struct rpc_message msg = {
5160 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5163 if (server->nfs_client->cl_mvops->minor_version != 0)
5165 data = kmalloc(sizeof(*data), GFP_NOFS);
5169 data->server = server;
5170 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5171 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5172 data->args.lock_owner.s_dev = server->s_dev;
5173 msg.rpc_argp = &data->args;
5174 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5178 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5180 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5181 const void *buf, size_t buflen,
5182 int flags, int type)
5184 if (strcmp(key, "") != 0)
5187 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5190 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5191 void *buf, size_t buflen, int type)
5193 if (strcmp(key, "") != 0)
5196 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5199 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5200 size_t list_len, const char *name,
5201 size_t name_len, int type)
5203 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5205 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5208 if (list && len <= list_len)
5209 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5214 * nfs_fhget will use either the mounted_on_fileid or the fileid
5216 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5218 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5219 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5220 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5221 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5224 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5225 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5226 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5230 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5231 const struct qstr *name,
5232 struct nfs4_fs_locations *fs_locations,
5235 struct nfs_server *server = NFS_SERVER(dir);
5237 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5239 struct nfs4_fs_locations_arg args = {
5240 .dir_fh = NFS_FH(dir),
5245 struct nfs4_fs_locations_res res = {
5246 .fs_locations = fs_locations,
5248 struct rpc_message msg = {
5249 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5255 dprintk("%s: start\n", __func__);
5257 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5258 * is not supported */
5259 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5260 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5262 bitmask[0] |= FATTR4_WORD0_FILEID;
5264 nfs_fattr_init(&fs_locations->fattr);
5265 fs_locations->server = server;
5266 fs_locations->nlocations = 0;
5267 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5268 dprintk("%s: returned status = %d\n", __func__, status);
5272 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5273 const struct qstr *name,
5274 struct nfs4_fs_locations *fs_locations,
5277 struct nfs4_exception exception = { };
5280 err = nfs4_handle_exception(NFS_SERVER(dir),
5281 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5283 } while (exception.retry);
5287 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5290 struct nfs4_secinfo_arg args = {
5291 .dir_fh = NFS_FH(dir),
5294 struct nfs4_secinfo_res res = {
5297 struct rpc_message msg = {
5298 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5303 dprintk("NFS call secinfo %s\n", name->name);
5304 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5305 dprintk("NFS reply secinfo: %d\n", status);
5309 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5310 struct nfs4_secinfo_flavors *flavors)
5312 struct nfs4_exception exception = { };
5315 err = nfs4_handle_exception(NFS_SERVER(dir),
5316 _nfs4_proc_secinfo(dir, name, flavors),
5318 } while (exception.retry);
5322 #ifdef CONFIG_NFS_V4_1
5324 * Check the exchange flags returned by the server for invalid flags, having
5325 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5328 static int nfs4_check_cl_exchange_flags(u32 flags)
5330 if (flags & ~EXCHGID4_FLAG_MASK_R)
5332 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5333 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5335 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5339 return -NFS4ERR_INVAL;
5343 nfs41_same_server_scope(struct nfs41_server_scope *a,
5344 struct nfs41_server_scope *b)
5346 if (a->server_scope_sz == b->server_scope_sz &&
5347 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5354 * nfs4_proc_bind_conn_to_session()
5356 * The 4.1 client currently uses the same TCP connection for the
5357 * fore and backchannel.
5359 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5362 struct nfs41_bind_conn_to_session_res res;
5363 struct rpc_message msg = {
5365 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5371 dprintk("--> %s\n", __func__);
5373 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5374 if (unlikely(res.session == NULL)) {
5379 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5381 if (memcmp(res.session->sess_id.data,
5382 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5383 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5387 if (res.dir != NFS4_CDFS4_BOTH) {
5388 dprintk("NFS: %s: Unexpected direction from server\n",
5393 if (res.use_conn_in_rdma_mode) {
5394 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5403 dprintk("<-- %s status= %d\n", __func__, status);
5408 * nfs4_proc_exchange_id()
5410 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5412 * Since the clientid has expired, all compounds using sessions
5413 * associated with the stale clientid will be returning
5414 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5415 * be in some phase of session reset.
5417 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5419 nfs4_verifier verifier;
5420 struct nfs41_exchange_id_args args = {
5421 .verifier = &verifier,
5423 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5425 struct nfs41_exchange_id_res res = {
5429 struct rpc_message msg = {
5430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5436 nfs4_init_boot_verifier(clp, &verifier);
5437 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5439 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5440 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5441 args.id_len, args.id);
5443 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5445 if (unlikely(res.server_owner == NULL)) {
5450 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5452 if (unlikely(res.server_scope == NULL)) {
5454 goto out_server_owner;
5457 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5458 if (unlikely(res.impl_id == NULL)) {
5460 goto out_server_scope;
5463 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5465 status = nfs4_check_cl_exchange_flags(res.flags);
5468 clp->cl_clientid = res.clientid;
5469 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5470 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5471 clp->cl_seqid = res.seqid;
5473 kfree(clp->cl_serverowner);
5474 clp->cl_serverowner = res.server_owner;
5475 res.server_owner = NULL;
5477 /* use the most recent implementation id */
5478 kfree(clp->cl_implid);
5479 clp->cl_implid = res.impl_id;
5481 if (clp->cl_serverscope != NULL &&
5482 !nfs41_same_server_scope(clp->cl_serverscope,
5483 res.server_scope)) {
5484 dprintk("%s: server_scope mismatch detected\n",
5486 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5487 kfree(clp->cl_serverscope);
5488 clp->cl_serverscope = NULL;
5491 if (clp->cl_serverscope == NULL) {
5492 clp->cl_serverscope = res.server_scope;
5499 kfree(res.server_owner);
5501 kfree(res.server_scope);
5503 if (clp->cl_implid != NULL)
5504 dprintk("NFS reply exchange_id: Server Implementation ID: "
5505 "domain: %s, name: %s, date: %llu,%u\n",
5506 clp->cl_implid->domain, clp->cl_implid->name,
5507 clp->cl_implid->date.seconds,
5508 clp->cl_implid->date.nseconds);
5509 dprintk("NFS reply exchange_id: %d\n", status);
5513 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5514 struct rpc_cred *cred)
5516 struct rpc_message msg = {
5517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5523 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5525 dprintk("NFS: Got error %d from the server %s on "
5526 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5530 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5531 struct rpc_cred *cred)
5536 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5537 ret = _nfs4_proc_destroy_clientid(clp, cred);
5539 case -NFS4ERR_DELAY:
5540 case -NFS4ERR_CLIENTID_BUSY:
5550 int nfs4_destroy_clientid(struct nfs_client *clp)
5552 struct rpc_cred *cred;
5555 if (clp->cl_mvops->minor_version < 1)
5557 if (clp->cl_exchange_flags == 0)
5559 if (clp->cl_preserve_clid)
5561 cred = nfs4_get_exchange_id_cred(clp);
5562 ret = nfs4_proc_destroy_clientid(clp, cred);
5567 case -NFS4ERR_STALE_CLIENTID:
5568 clp->cl_exchange_flags = 0;
5574 struct nfs4_get_lease_time_data {
5575 struct nfs4_get_lease_time_args *args;
5576 struct nfs4_get_lease_time_res *res;
5577 struct nfs_client *clp;
5580 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5583 struct nfs4_get_lease_time_data *data =
5584 (struct nfs4_get_lease_time_data *)calldata;
5586 dprintk("--> %s\n", __func__);
5587 /* just setup sequence, do not trigger session recovery
5588 since we're invoked within one */
5589 nfs41_setup_sequence(data->clp->cl_session,
5590 &data->args->la_seq_args,
5591 &data->res->lr_seq_res,
5593 dprintk("<-- %s\n", __func__);
5597 * Called from nfs4_state_manager thread for session setup, so don't recover
5598 * from sequence operation or clientid errors.
5600 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5602 struct nfs4_get_lease_time_data *data =
5603 (struct nfs4_get_lease_time_data *)calldata;
5605 dprintk("--> %s\n", __func__);
5606 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5608 switch (task->tk_status) {
5609 case -NFS4ERR_DELAY:
5610 case -NFS4ERR_GRACE:
5611 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5612 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5613 task->tk_status = 0;
5615 case -NFS4ERR_RETRY_UNCACHED_REP:
5616 rpc_restart_call_prepare(task);
5619 dprintk("<-- %s\n", __func__);
5622 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5623 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5624 .rpc_call_done = nfs4_get_lease_time_done,
5627 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5629 struct rpc_task *task;
5630 struct nfs4_get_lease_time_args args;
5631 struct nfs4_get_lease_time_res res = {
5632 .lr_fsinfo = fsinfo,
5634 struct nfs4_get_lease_time_data data = {
5639 struct rpc_message msg = {
5640 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5644 struct rpc_task_setup task_setup = {
5645 .rpc_client = clp->cl_rpcclient,
5646 .rpc_message = &msg,
5647 .callback_ops = &nfs4_get_lease_time_ops,
5648 .callback_data = &data,
5649 .flags = RPC_TASK_TIMEOUT,
5653 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5654 nfs4_set_sequence_privileged(&args.la_seq_args);
5655 dprintk("--> %s\n", __func__);
5656 task = rpc_run_task(&task_setup);
5659 status = PTR_ERR(task);
5661 status = task->tk_status;
5664 dprintk("<-- %s return %d\n", __func__, status);
5670 * Initialize the values to be used by the client in CREATE_SESSION
5671 * If nfs4_init_session set the fore channel request and response sizes,
5674 * Set the back channel max_resp_sz_cached to zero to force the client to
5675 * always set csa_cachethis to FALSE because the current implementation
5676 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5678 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5680 struct nfs4_session *session = args->client->cl_session;
5681 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5682 mxresp_sz = session->fc_target_max_resp_sz;
5685 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5687 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5688 /* Fore channel attributes */
5689 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5690 args->fc_attrs.max_resp_sz = mxresp_sz;
5691 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5692 args->fc_attrs.max_reqs = max_session_slots;
5694 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5695 "max_ops=%u max_reqs=%u\n",
5697 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5698 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5700 /* Back channel attributes */
5701 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5702 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5703 args->bc_attrs.max_resp_sz_cached = 0;
5704 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5705 args->bc_attrs.max_reqs = 1;
5707 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5708 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5710 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5711 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5712 args->bc_attrs.max_reqs);
5715 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5717 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5718 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5720 if (rcvd->max_resp_sz > sent->max_resp_sz)
5723 * Our requested max_ops is the minimum we need; we're not
5724 * prepared to break up compounds into smaller pieces than that.
5725 * So, no point even trying to continue if the server won't
5728 if (rcvd->max_ops < sent->max_ops)
5730 if (rcvd->max_reqs == 0)
5732 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5733 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5737 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5739 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5740 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5742 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5744 if (rcvd->max_resp_sz < sent->max_resp_sz)
5746 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5748 /* These would render the backchannel useless: */
5749 if (rcvd->max_ops != sent->max_ops)
5751 if (rcvd->max_reqs != sent->max_reqs)
5756 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5757 struct nfs4_session *session)
5761 ret = nfs4_verify_fore_channel_attrs(args, session);
5764 return nfs4_verify_back_channel_attrs(args, session);
5767 static int _nfs4_proc_create_session(struct nfs_client *clp,
5768 struct rpc_cred *cred)
5770 struct nfs4_session *session = clp->cl_session;
5771 struct nfs41_create_session_args args = {
5773 .cb_program = NFS4_CALLBACK,
5775 struct nfs41_create_session_res res = {
5778 struct rpc_message msg = {
5779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5786 nfs4_init_channel_attrs(&args);
5787 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5789 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5792 /* Verify the session's negotiated channel_attrs values */
5793 status = nfs4_verify_channel_attrs(&args, session);
5794 /* Increment the clientid slot sequence id */
5802 * Issues a CREATE_SESSION operation to the server.
5803 * It is the responsibility of the caller to verify the session is
5804 * expired before calling this routine.
5806 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5810 struct nfs4_session *session = clp->cl_session;
5812 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5814 status = _nfs4_proc_create_session(clp, cred);
5818 /* Init or reset the session slot tables */
5819 status = nfs4_setup_session_slot_tables(session);
5820 dprintk("slot table setup returned %d\n", status);
5824 ptr = (unsigned *)&session->sess_id.data[0];
5825 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5826 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5828 dprintk("<-- %s\n", __func__);
5833 * Issue the over-the-wire RPC DESTROY_SESSION.
5834 * The caller must serialize access to this routine.
5836 int nfs4_proc_destroy_session(struct nfs4_session *session,
5837 struct rpc_cred *cred)
5839 struct rpc_message msg = {
5840 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5841 .rpc_argp = session,
5846 dprintk("--> nfs4_proc_destroy_session\n");
5848 /* session is still being setup */
5849 if (session->clp->cl_cons_state != NFS_CS_READY)
5852 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5855 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
5856 "Session has been destroyed regardless...\n", status);
5858 dprintk("<-- nfs4_proc_destroy_session\n");
5863 * Renew the cl_session lease.
5865 struct nfs4_sequence_data {
5866 struct nfs_client *clp;
5867 struct nfs4_sequence_args args;
5868 struct nfs4_sequence_res res;
5871 static void nfs41_sequence_release(void *data)
5873 struct nfs4_sequence_data *calldata = data;
5874 struct nfs_client *clp = calldata->clp;
5876 if (atomic_read(&clp->cl_count) > 1)
5877 nfs4_schedule_state_renewal(clp);
5878 nfs_put_client(clp);
5882 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5884 switch(task->tk_status) {
5885 case -NFS4ERR_DELAY:
5886 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5889 nfs4_schedule_lease_recovery(clp);
5894 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5896 struct nfs4_sequence_data *calldata = data;
5897 struct nfs_client *clp = calldata->clp;
5899 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5902 if (task->tk_status < 0) {
5903 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5904 if (atomic_read(&clp->cl_count) == 1)
5907 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5908 rpc_restart_call_prepare(task);
5912 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5914 dprintk("<-- %s\n", __func__);
5917 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5919 struct nfs4_sequence_data *calldata = data;
5920 struct nfs_client *clp = calldata->clp;
5921 struct nfs4_sequence_args *args;
5922 struct nfs4_sequence_res *res;
5924 args = task->tk_msg.rpc_argp;
5925 res = task->tk_msg.rpc_resp;
5927 nfs41_setup_sequence(clp->cl_session, args, res, task);
5930 static const struct rpc_call_ops nfs41_sequence_ops = {
5931 .rpc_call_done = nfs41_sequence_call_done,
5932 .rpc_call_prepare = nfs41_sequence_prepare,
5933 .rpc_release = nfs41_sequence_release,
5936 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5937 struct rpc_cred *cred,
5940 struct nfs4_sequence_data *calldata;
5941 struct rpc_message msg = {
5942 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5945 struct rpc_task_setup task_setup_data = {
5946 .rpc_client = clp->cl_rpcclient,
5947 .rpc_message = &msg,
5948 .callback_ops = &nfs41_sequence_ops,
5949 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5952 if (!atomic_inc_not_zero(&clp->cl_count))
5953 return ERR_PTR(-EIO);
5954 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5955 if (calldata == NULL) {
5956 nfs_put_client(clp);
5957 return ERR_PTR(-ENOMEM);
5959 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5961 nfs4_set_sequence_privileged(&calldata->args);
5962 msg.rpc_argp = &calldata->args;
5963 msg.rpc_resp = &calldata->res;
5964 calldata->clp = clp;
5965 task_setup_data.callback_data = calldata;
5967 return rpc_run_task(&task_setup_data);
5970 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5972 struct rpc_task *task;
5975 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5977 task = _nfs41_proc_sequence(clp, cred, false);
5979 ret = PTR_ERR(task);
5981 rpc_put_task_async(task);
5982 dprintk("<-- %s status=%d\n", __func__, ret);
5986 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5988 struct rpc_task *task;
5991 task = _nfs41_proc_sequence(clp, cred, true);
5993 ret = PTR_ERR(task);
5996 ret = rpc_wait_for_completion_task(task);
5998 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6000 if (task->tk_status == 0)
6001 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
6002 ret = task->tk_status;
6006 dprintk("<-- %s status=%d\n", __func__, ret);
6010 struct nfs4_reclaim_complete_data {
6011 struct nfs_client *clp;
6012 struct nfs41_reclaim_complete_args arg;
6013 struct nfs41_reclaim_complete_res res;
6016 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6018 struct nfs4_reclaim_complete_data *calldata = data;
6020 nfs41_setup_sequence(calldata->clp->cl_session,
6021 &calldata->arg.seq_args,
6022 &calldata->res.seq_res,
6026 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6028 switch(task->tk_status) {
6030 case -NFS4ERR_COMPLETE_ALREADY:
6031 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6033 case -NFS4ERR_DELAY:
6034 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6036 case -NFS4ERR_RETRY_UNCACHED_REP:
6039 nfs4_schedule_lease_recovery(clp);
6044 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6046 struct nfs4_reclaim_complete_data *calldata = data;
6047 struct nfs_client *clp = calldata->clp;
6048 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6050 dprintk("--> %s\n", __func__);
6051 if (!nfs41_sequence_done(task, res))
6054 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6055 rpc_restart_call_prepare(task);
6058 dprintk("<-- %s\n", __func__);
6061 static void nfs4_free_reclaim_complete_data(void *data)
6063 struct nfs4_reclaim_complete_data *calldata = data;
6068 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6069 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6070 .rpc_call_done = nfs4_reclaim_complete_done,
6071 .rpc_release = nfs4_free_reclaim_complete_data,
6075 * Issue a global reclaim complete.
6077 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6079 struct nfs4_reclaim_complete_data *calldata;
6080 struct rpc_task *task;
6081 struct rpc_message msg = {
6082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6084 struct rpc_task_setup task_setup_data = {
6085 .rpc_client = clp->cl_rpcclient,
6086 .rpc_message = &msg,
6087 .callback_ops = &nfs4_reclaim_complete_call_ops,
6088 .flags = RPC_TASK_ASYNC,
6090 int status = -ENOMEM;
6092 dprintk("--> %s\n", __func__);
6093 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6094 if (calldata == NULL)
6096 calldata->clp = clp;
6097 calldata->arg.one_fs = 0;
6099 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6100 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
6101 msg.rpc_argp = &calldata->arg;
6102 msg.rpc_resp = &calldata->res;
6103 task_setup_data.callback_data = calldata;
6104 task = rpc_run_task(&task_setup_data);
6106 status = PTR_ERR(task);
6109 status = nfs4_wait_for_completion_rpc_task(task);
6111 status = task->tk_status;
6115 dprintk("<-- %s status=%d\n", __func__, status);
6120 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6122 struct nfs4_layoutget *lgp = calldata;
6123 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6124 struct nfs4_session *session = nfs4_get_session(server);
6126 dprintk("--> %s\n", __func__);
6127 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6128 * right now covering the LAYOUTGET we are about to send.
6129 * However, that is not so catastrophic, and there seems
6130 * to be no way to prevent it completely.
6132 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
6133 &lgp->res.seq_res, task))
6135 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6136 NFS_I(lgp->args.inode)->layout,
6137 lgp->args.ctx->state)) {
6138 rpc_exit(task, NFS4_OK);
6142 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6144 struct nfs4_layoutget *lgp = calldata;
6145 struct inode *inode = lgp->args.inode;
6146 struct nfs_server *server = NFS_SERVER(inode);
6147 struct pnfs_layout_hdr *lo;
6148 struct nfs4_state *state = NULL;
6149 unsigned long timeo, giveup;
6151 dprintk("--> %s\n", __func__);
6153 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
6156 switch (task->tk_status) {
6159 case -NFS4ERR_LAYOUTTRYLATER:
6160 case -NFS4ERR_RECALLCONFLICT:
6161 timeo = rpc_get_timeout(task->tk_client);
6162 giveup = lgp->args.timestamp + timeo;
6163 if (time_after(giveup, jiffies))
6164 task->tk_status = -NFS4ERR_DELAY;
6166 case -NFS4ERR_EXPIRED:
6167 case -NFS4ERR_BAD_STATEID:
6168 spin_lock(&inode->i_lock);
6169 lo = NFS_I(inode)->layout;
6170 if (!lo || list_empty(&lo->plh_segs)) {
6171 spin_unlock(&inode->i_lock);
6172 /* If the open stateid was bad, then recover it. */
6173 state = lgp->args.ctx->state;
6177 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6178 spin_unlock(&inode->i_lock);
6179 /* Mark the bad layout state as invalid, then
6180 * retry using the open stateid. */
6181 pnfs_free_lseg_list(&head);
6184 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6185 rpc_restart_call_prepare(task);
6187 dprintk("<-- %s\n", __func__);
6190 static size_t max_response_pages(struct nfs_server *server)
6192 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6193 return nfs_page_array_len(0, max_resp_sz);
6196 static void nfs4_free_pages(struct page **pages, size_t size)
6203 for (i = 0; i < size; i++) {
6206 __free_page(pages[i]);
6211 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6213 struct page **pages;
6216 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6218 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6222 for (i = 0; i < size; i++) {
6223 pages[i] = alloc_page(gfp_flags);
6225 dprintk("%s: failed to allocate page\n", __func__);
6226 nfs4_free_pages(pages, size);
6234 static void nfs4_layoutget_release(void *calldata)
6236 struct nfs4_layoutget *lgp = calldata;
6237 struct inode *inode = lgp->args.inode;
6238 struct nfs_server *server = NFS_SERVER(inode);
6239 size_t max_pages = max_response_pages(server);
6241 dprintk("--> %s\n", __func__);
6242 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6243 pnfs_put_layout_hdr(NFS_I(inode)->layout);
6244 put_nfs_open_context(lgp->args.ctx);
6246 dprintk("<-- %s\n", __func__);
6249 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6250 .rpc_call_prepare = nfs4_layoutget_prepare,
6251 .rpc_call_done = nfs4_layoutget_done,
6252 .rpc_release = nfs4_layoutget_release,
6255 struct pnfs_layout_segment *
6256 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6258 struct inode *inode = lgp->args.inode;
6259 struct nfs_server *server = NFS_SERVER(inode);
6260 size_t max_pages = max_response_pages(server);
6261 struct rpc_task *task;
6262 struct rpc_message msg = {
6263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6264 .rpc_argp = &lgp->args,
6265 .rpc_resp = &lgp->res,
6267 struct rpc_task_setup task_setup_data = {
6268 .rpc_client = server->client,
6269 .rpc_message = &msg,
6270 .callback_ops = &nfs4_layoutget_call_ops,
6271 .callback_data = lgp,
6272 .flags = RPC_TASK_ASYNC,
6274 struct pnfs_layout_segment *lseg = NULL;
6277 dprintk("--> %s\n", __func__);
6279 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6280 if (!lgp->args.layout.pages) {
6281 nfs4_layoutget_release(lgp);
6282 return ERR_PTR(-ENOMEM);
6284 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6285 lgp->args.timestamp = jiffies;
6287 lgp->res.layoutp = &lgp->args.layout;
6288 lgp->res.seq_res.sr_slot = NULL;
6289 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6291 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6292 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6294 task = rpc_run_task(&task_setup_data);
6296 return ERR_CAST(task);
6297 status = nfs4_wait_for_completion_rpc_task(task);
6299 status = task->tk_status;
6300 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6301 if (status == 0 && lgp->res.layoutp->len)
6302 lseg = pnfs_layout_process(lgp);
6304 dprintk("<-- %s status=%d\n", __func__, status);
6306 return ERR_PTR(status);
6311 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6313 struct nfs4_layoutreturn *lrp = calldata;
6315 dprintk("--> %s\n", __func__);
6316 nfs41_setup_sequence(lrp->clp->cl_session,
6317 &lrp->args.seq_args,
6322 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6324 struct nfs4_layoutreturn *lrp = calldata;
6325 struct nfs_server *server;
6327 dprintk("--> %s\n", __func__);
6329 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
6332 server = NFS_SERVER(lrp->args.inode);
6333 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6334 rpc_restart_call_prepare(task);
6337 dprintk("<-- %s\n", __func__);
6340 static void nfs4_layoutreturn_release(void *calldata)
6342 struct nfs4_layoutreturn *lrp = calldata;
6343 struct pnfs_layout_hdr *lo = lrp->args.layout;
6345 dprintk("--> %s\n", __func__);
6346 spin_lock(&lo->plh_inode->i_lock);
6347 if (lrp->res.lrs_present)
6348 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6349 lo->plh_block_lgets--;
6350 spin_unlock(&lo->plh_inode->i_lock);
6351 pnfs_put_layout_hdr(lrp->args.layout);
6353 dprintk("<-- %s\n", __func__);
6356 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6357 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6358 .rpc_call_done = nfs4_layoutreturn_done,
6359 .rpc_release = nfs4_layoutreturn_release,
6362 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6364 struct rpc_task *task;
6365 struct rpc_message msg = {
6366 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6367 .rpc_argp = &lrp->args,
6368 .rpc_resp = &lrp->res,
6370 struct rpc_task_setup task_setup_data = {
6371 .rpc_client = lrp->clp->cl_rpcclient,
6372 .rpc_message = &msg,
6373 .callback_ops = &nfs4_layoutreturn_call_ops,
6374 .callback_data = lrp,
6378 dprintk("--> %s\n", __func__);
6379 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6380 task = rpc_run_task(&task_setup_data);
6382 return PTR_ERR(task);
6383 status = task->tk_status;
6384 dprintk("<-- %s status=%d\n", __func__, status);
6390 * Retrieve the list of Data Server devices from the MDS.
6392 static int _nfs4_getdevicelist(struct nfs_server *server,
6393 const struct nfs_fh *fh,
6394 struct pnfs_devicelist *devlist)
6396 struct nfs4_getdevicelist_args args = {
6398 .layoutclass = server->pnfs_curr_ld->id,
6400 struct nfs4_getdevicelist_res res = {
6403 struct rpc_message msg = {
6404 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6410 dprintk("--> %s\n", __func__);
6411 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6413 dprintk("<-- %s status=%d\n", __func__, status);
6417 int nfs4_proc_getdevicelist(struct nfs_server *server,
6418 const struct nfs_fh *fh,
6419 struct pnfs_devicelist *devlist)
6421 struct nfs4_exception exception = { };
6425 err = nfs4_handle_exception(server,
6426 _nfs4_getdevicelist(server, fh, devlist),
6428 } while (exception.retry);
6430 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6431 err, devlist->num_devs);
6435 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6438 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6440 struct nfs4_getdeviceinfo_args args = {
6443 struct nfs4_getdeviceinfo_res res = {
6446 struct rpc_message msg = {
6447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6453 dprintk("--> %s\n", __func__);
6454 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6455 dprintk("<-- %s status=%d\n", __func__, status);
6460 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6462 struct nfs4_exception exception = { };
6466 err = nfs4_handle_exception(server,
6467 _nfs4_proc_getdeviceinfo(server, pdev),
6469 } while (exception.retry);
6472 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6474 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6476 struct nfs4_layoutcommit_data *data = calldata;
6477 struct nfs_server *server = NFS_SERVER(data->args.inode);
6478 struct nfs4_session *session = nfs4_get_session(server);
6480 nfs41_setup_sequence(session,
6481 &data->args.seq_args,
6487 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6489 struct nfs4_layoutcommit_data *data = calldata;
6490 struct nfs_server *server = NFS_SERVER(data->args.inode);
6492 if (!nfs41_sequence_done(task, &data->res.seq_res))
6495 switch (task->tk_status) { /* Just ignore these failures */
6496 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6497 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6498 case -NFS4ERR_BADLAYOUT: /* no layout */
6499 case -NFS4ERR_GRACE: /* loca_recalim always false */
6500 task->tk_status = 0;
6503 nfs_post_op_update_inode_force_wcc(data->args.inode,
6507 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6508 rpc_restart_call_prepare(task);
6514 static void nfs4_layoutcommit_release(void *calldata)
6516 struct nfs4_layoutcommit_data *data = calldata;
6518 pnfs_cleanup_layoutcommit(data);
6519 put_rpccred(data->cred);
6523 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6524 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6525 .rpc_call_done = nfs4_layoutcommit_done,
6526 .rpc_release = nfs4_layoutcommit_release,
6530 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6532 struct rpc_message msg = {
6533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6534 .rpc_argp = &data->args,
6535 .rpc_resp = &data->res,
6536 .rpc_cred = data->cred,
6538 struct rpc_task_setup task_setup_data = {
6539 .task = &data->task,
6540 .rpc_client = NFS_CLIENT(data->args.inode),
6541 .rpc_message = &msg,
6542 .callback_ops = &nfs4_layoutcommit_ops,
6543 .callback_data = data,
6544 .flags = RPC_TASK_ASYNC,
6546 struct rpc_task *task;
6549 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6550 "lbw: %llu inode %lu\n",
6551 data->task.tk_pid, sync,
6552 data->args.lastbytewritten,
6553 data->args.inode->i_ino);
6555 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6556 task = rpc_run_task(&task_setup_data);
6558 return PTR_ERR(task);
6561 status = nfs4_wait_for_completion_rpc_task(task);
6564 status = task->tk_status;
6566 dprintk("%s: status %d\n", __func__, status);
6572 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6573 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6575 struct nfs41_secinfo_no_name_args args = {
6576 .style = SECINFO_STYLE_CURRENT_FH,
6578 struct nfs4_secinfo_res res = {
6581 struct rpc_message msg = {
6582 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6586 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6590 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6591 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6593 struct nfs4_exception exception = { };
6596 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6599 case -NFS4ERR_WRONGSEC:
6600 case -NFS4ERR_NOTSUPP:
6603 err = nfs4_handle_exception(server, err, &exception);
6605 } while (exception.retry);
6611 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6612 struct nfs_fsinfo *info)
6616 rpc_authflavor_t flavor;
6617 struct nfs4_secinfo_flavors *flavors;
6619 page = alloc_page(GFP_KERNEL);
6625 flavors = page_address(page);
6626 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6629 * Fall back on "guess and check" method if
6630 * the server doesn't support SECINFO_NO_NAME
6632 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6633 err = nfs4_find_root_sec(server, fhandle, info);
6639 flavor = nfs_find_best_sec(flavors);
6641 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6651 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6654 struct nfs41_test_stateid_args args = {
6657 struct nfs41_test_stateid_res res;
6658 struct rpc_message msg = {
6659 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6664 dprintk("NFS call test_stateid %p\n", stateid);
6665 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6666 nfs4_set_sequence_privileged(&args.seq_args);
6667 status = nfs4_call_sync_sequence(server->client, server, &msg,
6668 &args.seq_args, &res.seq_res);
6669 if (status != NFS_OK) {
6670 dprintk("NFS reply test_stateid: failed, %d\n", status);
6673 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
6678 * nfs41_test_stateid - perform a TEST_STATEID operation
6680 * @server: server / transport on which to perform the operation
6681 * @stateid: state ID to test
6683 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6684 * Otherwise a negative NFS4ERR value is returned if the operation
6685 * failed or the state ID is not currently valid.
6687 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6689 struct nfs4_exception exception = { };
6692 err = _nfs41_test_stateid(server, stateid);
6693 if (err != -NFS4ERR_DELAY)
6695 nfs4_handle_exception(server, err, &exception);
6696 } while (exception.retry);
6700 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6702 struct nfs41_free_stateid_args args = {
6705 struct nfs41_free_stateid_res res;
6706 struct rpc_message msg = {
6707 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6713 dprintk("NFS call free_stateid %p\n", stateid);
6714 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6715 nfs4_set_sequence_privileged(&args.seq_args);
6716 status = nfs4_call_sync_sequence(server->client, server, &msg,
6717 &args.seq_args, &res.seq_res);
6718 dprintk("NFS reply free_stateid: %d\n", status);
6723 * nfs41_free_stateid - perform a FREE_STATEID operation
6725 * @server: server / transport on which to perform the operation
6726 * @stateid: state ID to release
6728 * Returns NFS_OK if the server freed "stateid". Otherwise a
6729 * negative NFS4ERR value is returned.
6731 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6733 struct nfs4_exception exception = { };
6736 err = _nfs4_free_stateid(server, stateid);
6737 if (err != -NFS4ERR_DELAY)
6739 nfs4_handle_exception(server, err, &exception);
6740 } while (exception.retry);
6744 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6745 const nfs4_stateid *s2)
6747 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6750 if (s1->seqid == s2->seqid)
6752 if (s1->seqid == 0 || s2->seqid == 0)
6758 #endif /* CONFIG_NFS_V4_1 */
6760 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6761 const nfs4_stateid *s2)
6763 return nfs4_stateid_match(s1, s2);
6767 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6768 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6769 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6770 .recover_open = nfs4_open_reclaim,
6771 .recover_lock = nfs4_lock_reclaim,
6772 .establish_clid = nfs4_init_clientid,
6773 .get_clid_cred = nfs4_get_setclientid_cred,
6774 .detect_trunking = nfs40_discover_server_trunking,
6777 #if defined(CONFIG_NFS_V4_1)
6778 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6779 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6780 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6781 .recover_open = nfs4_open_reclaim,
6782 .recover_lock = nfs4_lock_reclaim,
6783 .establish_clid = nfs41_init_clientid,
6784 .get_clid_cred = nfs4_get_exchange_id_cred,
6785 .reclaim_complete = nfs41_proc_reclaim_complete,
6786 .detect_trunking = nfs41_discover_server_trunking,
6788 #endif /* CONFIG_NFS_V4_1 */
6790 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6791 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6792 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6793 .recover_open = nfs4_open_expired,
6794 .recover_lock = nfs4_lock_expired,
6795 .establish_clid = nfs4_init_clientid,
6796 .get_clid_cred = nfs4_get_setclientid_cred,
6799 #if defined(CONFIG_NFS_V4_1)
6800 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6801 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6802 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6803 .recover_open = nfs41_open_expired,
6804 .recover_lock = nfs41_lock_expired,
6805 .establish_clid = nfs41_init_clientid,
6806 .get_clid_cred = nfs4_get_exchange_id_cred,
6808 #endif /* CONFIG_NFS_V4_1 */
6810 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6811 .sched_state_renewal = nfs4_proc_async_renew,
6812 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6813 .renew_lease = nfs4_proc_renew,
6816 #if defined(CONFIG_NFS_V4_1)
6817 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6818 .sched_state_renewal = nfs41_proc_async_sequence,
6819 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6820 .renew_lease = nfs4_proc_sequence,
6824 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6826 .init_caps = NFS_CAP_READDIRPLUS
6827 | NFS_CAP_ATOMIC_OPEN
6828 | NFS_CAP_CHANGE_ATTR
6829 | NFS_CAP_POSIX_LOCK,
6830 .call_sync = _nfs4_call_sync,
6831 .match_stateid = nfs4_match_stateid,
6832 .find_root_sec = nfs4_find_root_sec,
6833 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6834 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6835 .state_renewal_ops = &nfs40_state_renewal_ops,
6838 #if defined(CONFIG_NFS_V4_1)
6839 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6841 .init_caps = NFS_CAP_READDIRPLUS
6842 | NFS_CAP_ATOMIC_OPEN
6843 | NFS_CAP_CHANGE_ATTR
6844 | NFS_CAP_POSIX_LOCK,
6845 .call_sync = nfs4_call_sync_sequence,
6846 .match_stateid = nfs41_match_stateid,
6847 .find_root_sec = nfs41_find_root_sec,
6848 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6849 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6850 .state_renewal_ops = &nfs41_state_renewal_ops,
6854 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6855 [0] = &nfs_v4_0_minor_ops,
6856 #if defined(CONFIG_NFS_V4_1)
6857 [1] = &nfs_v4_1_minor_ops,
6861 const struct inode_operations nfs4_dir_inode_operations = {
6862 .create = nfs_create,
6863 .lookup = nfs_lookup,
6864 .atomic_open = nfs_atomic_open,
6866 .unlink = nfs_unlink,
6867 .symlink = nfs_symlink,
6871 .rename = nfs_rename,
6872 .permission = nfs_permission,
6873 .getattr = nfs_getattr,
6874 .setattr = nfs_setattr,
6875 .getxattr = generic_getxattr,
6876 .setxattr = generic_setxattr,
6877 .listxattr = generic_listxattr,
6878 .removexattr = generic_removexattr,
6881 static const struct inode_operations nfs4_file_inode_operations = {
6882 .permission = nfs_permission,
6883 .getattr = nfs_getattr,
6884 .setattr = nfs_setattr,
6885 .getxattr = generic_getxattr,
6886 .setxattr = generic_setxattr,
6887 .listxattr = generic_listxattr,
6888 .removexattr = generic_removexattr,
6891 const struct nfs_rpc_ops nfs_v4_clientops = {
6892 .version = 4, /* protocol version */
6893 .dentry_ops = &nfs4_dentry_operations,
6894 .dir_inode_ops = &nfs4_dir_inode_operations,
6895 .file_inode_ops = &nfs4_file_inode_operations,
6896 .file_ops = &nfs4_file_operations,
6897 .getroot = nfs4_proc_get_root,
6898 .submount = nfs4_submount,
6899 .try_mount = nfs4_try_mount,
6900 .getattr = nfs4_proc_getattr,
6901 .setattr = nfs4_proc_setattr,
6902 .lookup = nfs4_proc_lookup,
6903 .access = nfs4_proc_access,
6904 .readlink = nfs4_proc_readlink,
6905 .create = nfs4_proc_create,
6906 .remove = nfs4_proc_remove,
6907 .unlink_setup = nfs4_proc_unlink_setup,
6908 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
6909 .unlink_done = nfs4_proc_unlink_done,
6910 .rename = nfs4_proc_rename,
6911 .rename_setup = nfs4_proc_rename_setup,
6912 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
6913 .rename_done = nfs4_proc_rename_done,
6914 .link = nfs4_proc_link,
6915 .symlink = nfs4_proc_symlink,
6916 .mkdir = nfs4_proc_mkdir,
6917 .rmdir = nfs4_proc_remove,
6918 .readdir = nfs4_proc_readdir,
6919 .mknod = nfs4_proc_mknod,
6920 .statfs = nfs4_proc_statfs,
6921 .fsinfo = nfs4_proc_fsinfo,
6922 .pathconf = nfs4_proc_pathconf,
6923 .set_capabilities = nfs4_server_capabilities,
6924 .decode_dirent = nfs4_decode_dirent,
6925 .read_setup = nfs4_proc_read_setup,
6926 .read_pageio_init = pnfs_pageio_init_read,
6927 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
6928 .read_done = nfs4_read_done,
6929 .write_setup = nfs4_proc_write_setup,
6930 .write_pageio_init = pnfs_pageio_init_write,
6931 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6932 .write_done = nfs4_write_done,
6933 .commit_setup = nfs4_proc_commit_setup,
6934 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
6935 .commit_done = nfs4_commit_done,
6936 .lock = nfs4_proc_lock,
6937 .clear_acl_cache = nfs4_zap_acl_attr,
6938 .close_context = nfs4_close_context,
6939 .open_context = nfs4_atomic_open,
6940 .have_delegation = nfs4_have_delegation,
6941 .return_delegation = nfs4_inode_return_delegation,
6942 .alloc_client = nfs4_alloc_client,
6943 .init_client = nfs4_init_client,
6944 .free_client = nfs4_free_client,
6945 .create_server = nfs4_create_server,
6946 .clone_server = nfs_clone_server,
6949 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6950 .prefix = XATTR_NAME_NFSV4_ACL,
6951 .list = nfs4_xattr_list_nfs4_acl,
6952 .get = nfs4_xattr_get_nfs4_acl,
6953 .set = nfs4_xattr_set_nfs4_acl,
6956 const struct xattr_handler *nfs4_xattr_handlers[] = {
6957 &nfs4_xattr_nfs4_acl_handler,