4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/nfs.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs_fs.h>
49 #include <linux/nfs_page.h>
50 #include <linux/nfs_mount.h>
51 #include <linux/namei.h>
52 #include <linux/mount.h>
53 #include <linux/module.h>
54 #include <linux/nfs_idmap.h>
55 #include <linux/xattr.h>
56 #include <linux/utsname.h>
57 #include <linux/freezer.h>
60 #include "delegation.h"
66 #include "nfs4session.h"
69 #define NFSDBG_FACILITY NFSDBG_PROC
71 #define NFS4_POLL_RETRY_MIN (HZ/10)
72 #define NFS4_POLL_RETRY_MAX (15*HZ)
75 static int _nfs4_proc_open(struct nfs4_opendata *data);
76 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
77 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
78 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
79 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
80 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
81 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
82 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
83 struct nfs_fattr *fattr, struct iattr *sattr,
84 struct nfs4_state *state);
85 #ifdef CONFIG_NFS_V4_1
86 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
87 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
89 /* Prevent leaks of NFSv4 errors into userland */
90 static int nfs4_map_errors(int err)
95 case -NFS4ERR_RESOURCE:
97 case -NFS4ERR_WRONGSEC:
99 case -NFS4ERR_BADOWNER:
100 case -NFS4ERR_BADNAME:
102 case -NFS4ERR_SHARE_DENIED:
104 case -NFS4ERR_MINOR_VERS_MISMATCH:
105 return -EPROTONOSUPPORT;
106 case -NFS4ERR_ACCESS:
109 dprintk("%s could not handle NFSv4 error %d\n",
117 * This is our standard bitmap for GETATTR requests.
119 const u32 nfs4_fattr_bitmap[3] = {
121 | FATTR4_WORD0_CHANGE
124 | FATTR4_WORD0_FILEID,
126 | FATTR4_WORD1_NUMLINKS
128 | FATTR4_WORD1_OWNER_GROUP
129 | FATTR4_WORD1_RAWDEV
130 | FATTR4_WORD1_SPACE_USED
131 | FATTR4_WORD1_TIME_ACCESS
132 | FATTR4_WORD1_TIME_METADATA
133 | FATTR4_WORD1_TIME_MODIFY
136 static const u32 nfs4_pnfs_open_bitmap[3] = {
138 | FATTR4_WORD0_CHANGE
141 | FATTR4_WORD0_FILEID,
143 | FATTR4_WORD1_NUMLINKS
145 | FATTR4_WORD1_OWNER_GROUP
146 | FATTR4_WORD1_RAWDEV
147 | FATTR4_WORD1_SPACE_USED
148 | FATTR4_WORD1_TIME_ACCESS
149 | FATTR4_WORD1_TIME_METADATA
150 | FATTR4_WORD1_TIME_MODIFY,
151 FATTR4_WORD2_MDSTHRESHOLD
154 static const u32 nfs4_open_noattr_bitmap[3] = {
156 | FATTR4_WORD0_CHANGE
157 | FATTR4_WORD0_FILEID,
160 const u32 nfs4_statfs_bitmap[2] = {
161 FATTR4_WORD0_FILES_AVAIL
162 | FATTR4_WORD0_FILES_FREE
163 | FATTR4_WORD0_FILES_TOTAL,
164 FATTR4_WORD1_SPACE_AVAIL
165 | FATTR4_WORD1_SPACE_FREE
166 | FATTR4_WORD1_SPACE_TOTAL
169 const u32 nfs4_pathconf_bitmap[2] = {
171 | FATTR4_WORD0_MAXNAME,
175 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
176 | FATTR4_WORD0_MAXREAD
177 | FATTR4_WORD0_MAXWRITE
178 | FATTR4_WORD0_LEASE_TIME,
179 FATTR4_WORD1_TIME_DELTA
180 | FATTR4_WORD1_FS_LAYOUT_TYPES,
181 FATTR4_WORD2_LAYOUT_BLKSIZE
184 const u32 nfs4_fs_locations_bitmap[2] = {
186 | FATTR4_WORD0_CHANGE
189 | FATTR4_WORD0_FILEID
190 | FATTR4_WORD0_FS_LOCATIONS,
192 | FATTR4_WORD1_NUMLINKS
194 | FATTR4_WORD1_OWNER_GROUP
195 | FATTR4_WORD1_RAWDEV
196 | FATTR4_WORD1_SPACE_USED
197 | FATTR4_WORD1_TIME_ACCESS
198 | FATTR4_WORD1_TIME_METADATA
199 | FATTR4_WORD1_TIME_MODIFY
200 | FATTR4_WORD1_MOUNTED_ON_FILEID
203 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
204 struct nfs4_readdir_arg *readdir)
209 readdir->cookie = cookie;
210 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
215 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
220 * NFSv4 servers do not return entries for '.' and '..'
221 * Therefore, we fake these entries here. We let '.'
222 * have cookie 0 and '..' have cookie 1. Note that
223 * when talking to the server, we always send cookie 0
226 start = p = kmap_atomic(*readdir->pages);
229 *p++ = xdr_one; /* next */
230 *p++ = xdr_zero; /* cookie, first word */
231 *p++ = xdr_one; /* cookie, second word */
232 *p++ = xdr_one; /* entry len */
233 memcpy(p, ".\0\0\0", 4); /* entry */
235 *p++ = xdr_one; /* bitmap length */
236 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
237 *p++ = htonl(8); /* attribute buffer length */
238 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
241 *p++ = xdr_one; /* next */
242 *p++ = xdr_zero; /* cookie, first word */
243 *p++ = xdr_two; /* cookie, second word */
244 *p++ = xdr_two; /* entry len */
245 memcpy(p, "..\0\0", 4); /* entry */
247 *p++ = xdr_one; /* bitmap length */
248 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
249 *p++ = htonl(8); /* attribute buffer length */
250 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
252 readdir->pgbase = (char *)p - (char *)start;
253 readdir->count -= readdir->pgbase;
254 kunmap_atomic(start);
257 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
264 *timeout = NFS4_POLL_RETRY_MIN;
265 if (*timeout > NFS4_POLL_RETRY_MAX)
266 *timeout = NFS4_POLL_RETRY_MAX;
267 freezable_schedule_timeout_killable(*timeout);
268 if (fatal_signal_pending(current))
274 /* This is the error handling routine for processes that are allowed
277 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
279 struct nfs_client *clp = server->nfs_client;
280 struct nfs4_state *state = exception->state;
281 struct inode *inode = exception->inode;
284 exception->retry = 0;
288 case -NFS4ERR_OPENMODE:
289 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
290 nfs4_inode_return_delegation(inode);
291 exception->retry = 1;
296 nfs4_schedule_stateid_recovery(server, state);
297 goto wait_on_recovery;
298 case -NFS4ERR_DELEG_REVOKED:
299 case -NFS4ERR_ADMIN_REVOKED:
300 case -NFS4ERR_BAD_STATEID:
303 nfs_remove_bad_delegation(state->inode);
304 nfs4_schedule_stateid_recovery(server, state);
305 goto wait_on_recovery;
306 case -NFS4ERR_EXPIRED:
308 nfs4_schedule_stateid_recovery(server, state);
309 case -NFS4ERR_STALE_STATEID:
310 case -NFS4ERR_STALE_CLIENTID:
311 nfs4_schedule_lease_recovery(clp);
312 goto wait_on_recovery;
313 #if defined(CONFIG_NFS_V4_1)
314 case -NFS4ERR_BADSESSION:
315 case -NFS4ERR_BADSLOT:
316 case -NFS4ERR_BAD_HIGH_SLOT:
317 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
318 case -NFS4ERR_DEADSESSION:
319 case -NFS4ERR_SEQ_FALSE_RETRY:
320 case -NFS4ERR_SEQ_MISORDERED:
321 dprintk("%s ERROR: %d Reset session\n", __func__,
323 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
324 goto wait_on_recovery;
325 #endif /* defined(CONFIG_NFS_V4_1) */
326 case -NFS4ERR_FILE_OPEN:
327 if (exception->timeout > HZ) {
328 /* We have retried a decent amount, time to
336 ret = nfs4_delay(server->client, &exception->timeout);
339 case -NFS4ERR_RETRY_UNCACHED_REP:
340 case -NFS4ERR_OLD_STATEID:
341 exception->retry = 1;
343 case -NFS4ERR_BADOWNER:
344 /* The following works around a Linux server bug! */
345 case -NFS4ERR_BADNAME:
346 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
347 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
348 exception->retry = 1;
349 printk(KERN_WARNING "NFS: v4 server %s "
350 "does not accept raw "
352 "Reenabling the idmapper.\n",
353 server->nfs_client->cl_hostname);
356 /* We failed to handle the error */
357 return nfs4_map_errors(ret);
359 ret = nfs4_wait_clnt_recover(clp);
361 exception->retry = 1;
366 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
368 spin_lock(&clp->cl_lock);
369 if (time_before(clp->cl_last_renewal,timestamp))
370 clp->cl_last_renewal = timestamp;
371 spin_unlock(&clp->cl_lock);
374 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
376 do_renew_lease(server->nfs_client, timestamp);
379 #if defined(CONFIG_NFS_V4_1)
381 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
383 struct nfs4_session *session;
384 struct nfs4_slot_table *tbl;
385 bool send_new_highest_used_slotid = false;
388 /* just wake up the next guy waiting since
389 * we may have not consumed a slot after all */
390 dprintk("%s: No slot\n", __func__);
393 tbl = res->sr_slot->table;
394 session = tbl->session;
396 spin_lock(&tbl->slot_tbl_lock);
397 /* Be nice to the server: try to ensure that the last transmitted
398 * value for highest_user_slotid <= target_highest_slotid
400 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
401 send_new_highest_used_slotid = true;
403 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
404 send_new_highest_used_slotid = false;
407 nfs4_free_slot(tbl, res->sr_slot);
409 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
410 send_new_highest_used_slotid = false;
412 spin_unlock(&tbl->slot_tbl_lock);
414 if (send_new_highest_used_slotid)
415 nfs41_server_notify_highest_slotid_update(session->clp);
418 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
420 struct nfs4_session *session;
421 struct nfs4_slot *slot;
422 unsigned long timestamp;
423 struct nfs_client *clp;
427 * sr_status remains 1 if an RPC level error occurred. The server
428 * may or may not have processed the sequence operation..
429 * Proceed as if the server received and processed the sequence
432 if (res->sr_status == 1)
433 res->sr_status = NFS_OK;
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 /* Check the SEQUENCE operation status */
443 switch (res->sr_status) {
445 /* Update the slot's sequence and clientid lease timer */
447 timestamp = slot->renewal_time;
449 do_renew_lease(clp, timestamp);
450 /* Check sequence flags */
451 if (res->sr_status_flags != 0)
452 nfs4_schedule_lease_recovery(clp);
453 nfs41_update_target_slotid(slot->table, slot, res);
456 /* The server detected a resend of the RPC call and
457 * returned NFS4ERR_DELAY as per Section 2.10.6.2
460 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
465 case -NFS4ERR_BADSLOT:
467 * The slot id we used was probably retired. Try again
468 * using a different slot id.
471 case -NFS4ERR_SEQ_MISORDERED:
473 * Could this slot have been previously retired?
474 * If so, then the server may be expecting seq_nr = 1!
476 if (slot->seq_nr == 1)
480 case -NFS4ERR_SEQ_FALSE_RETRY:
484 /* Just update the slot sequence no. */
488 /* The session may be reset by one of the error handlers. */
489 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
490 nfs41_sequence_free_slot(res);
493 if (rpc_restart_call_prepare(task)) {
499 if (!rpc_restart_call(task))
501 rpc_delay(task, NFS4_POLL_RETRY_MAX);
505 static int nfs4_sequence_done(struct rpc_task *task,
506 struct nfs4_sequence_res *res)
508 if (res->sr_slot == NULL)
510 return nfs41_sequence_done(task, res);
513 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
514 struct nfs4_sequence_res *res, int cache_reply)
516 args->sa_slot = NULL;
517 args->sa_cache_this = 0;
518 args->sa_privileged = 0;
520 args->sa_cache_this = 1;
524 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
526 args->sa_privileged = 1;
529 int nfs41_setup_sequence(struct nfs4_session *session,
530 struct nfs4_sequence_args *args,
531 struct nfs4_sequence_res *res,
532 struct rpc_task *task)
534 struct nfs4_slot *slot;
535 struct nfs4_slot_table *tbl;
537 dprintk("--> %s\n", __func__);
538 /* slot already allocated? */
539 if (res->sr_slot != NULL)
542 tbl = &session->fc_slot_table;
544 task->tk_timeout = 0;
546 spin_lock(&tbl->slot_tbl_lock);
547 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
548 !args->sa_privileged) {
549 /* The state manager will wait until the slot table is empty */
550 dprintk("%s session is draining\n", __func__);
554 slot = nfs4_alloc_slot(tbl);
556 /* If out of memory, try again in 1/4 second */
557 if (slot == ERR_PTR(-ENOMEM))
558 task->tk_timeout = HZ >> 2;
559 dprintk("<-- %s: no free slots\n", __func__);
562 spin_unlock(&tbl->slot_tbl_lock);
564 args->sa_slot = slot;
566 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
567 slot->slot_nr, slot->seq_nr);
570 res->sr_status_flags = 0;
572 * sr_status is only set in decode_sequence, and so will remain
573 * set to 1 if an rpc level failure occurs.
577 rpc_call_start(task);
580 /* Privileged tasks are queued with top priority */
581 if (args->sa_privileged)
582 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
583 NULL, RPC_PRIORITY_PRIVILEGED);
585 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
586 spin_unlock(&tbl->slot_tbl_lock);
589 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
591 int nfs4_setup_sequence(const struct nfs_server *server,
592 struct nfs4_sequence_args *args,
593 struct nfs4_sequence_res *res,
594 struct rpc_task *task)
596 struct nfs4_session *session = nfs4_get_session(server);
599 if (session == NULL) {
600 rpc_call_start(task);
604 dprintk("--> %s clp %p session %p sr_slot %d\n",
605 __func__, session->clp, session, res->sr_slot ?
606 res->sr_slot->slot_nr : -1);
608 ret = nfs41_setup_sequence(session, args, res, task);
610 dprintk("<-- %s status=%d\n", __func__, ret);
614 struct nfs41_call_sync_data {
615 const struct nfs_server *seq_server;
616 struct nfs4_sequence_args *seq_args;
617 struct nfs4_sequence_res *seq_res;
620 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
622 struct nfs41_call_sync_data *data = calldata;
623 struct nfs4_session *session = nfs4_get_session(data->seq_server);
625 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
627 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
630 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
632 struct nfs41_call_sync_data *data = calldata;
634 nfs41_sequence_done(task, data->seq_res);
637 static const struct rpc_call_ops nfs41_call_sync_ops = {
638 .rpc_call_prepare = nfs41_call_sync_prepare,
639 .rpc_call_done = nfs41_call_sync_done,
642 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
643 struct nfs_server *server,
644 struct rpc_message *msg,
645 struct nfs4_sequence_args *args,
646 struct nfs4_sequence_res *res)
649 struct rpc_task *task;
650 struct nfs41_call_sync_data data = {
651 .seq_server = server,
655 struct rpc_task_setup task_setup = {
658 .callback_ops = &nfs41_call_sync_ops,
659 .callback_data = &data
662 task = rpc_run_task(&task_setup);
666 ret = task->tk_status;
674 void nfs41_init_sequence(struct nfs4_sequence_args *args,
675 struct nfs4_sequence_res *res, int cache_reply)
679 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
684 static int nfs4_sequence_done(struct rpc_task *task,
685 struct nfs4_sequence_res *res)
689 #endif /* CONFIG_NFS_V4_1 */
692 int _nfs4_call_sync(struct rpc_clnt *clnt,
693 struct nfs_server *server,
694 struct rpc_message *msg,
695 struct nfs4_sequence_args *args,
696 struct nfs4_sequence_res *res)
698 return rpc_call_sync(clnt, msg, 0);
702 int nfs4_call_sync(struct rpc_clnt *clnt,
703 struct nfs_server *server,
704 struct rpc_message *msg,
705 struct nfs4_sequence_args *args,
706 struct nfs4_sequence_res *res,
709 nfs41_init_sequence(args, res, cache_reply);
710 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
714 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
716 struct nfs_inode *nfsi = NFS_I(dir);
718 spin_lock(&dir->i_lock);
719 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
720 if (!cinfo->atomic || cinfo->before != dir->i_version)
721 nfs_force_lookup_revalidate(dir);
722 dir->i_version = cinfo->after;
723 spin_unlock(&dir->i_lock);
726 struct nfs4_opendata {
728 struct nfs_openargs o_arg;
729 struct nfs_openres o_res;
730 struct nfs_open_confirmargs c_arg;
731 struct nfs_open_confirmres c_res;
732 struct nfs4_string owner_name;
733 struct nfs4_string group_name;
734 struct nfs_fattr f_attr;
736 struct dentry *dentry;
737 struct nfs4_state_owner *owner;
738 struct nfs4_state *state;
740 unsigned long timestamp;
741 unsigned int rpc_done : 1;
747 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
749 p->o_res.f_attr = &p->f_attr;
750 p->o_res.seqid = p->o_arg.seqid;
751 p->c_res.seqid = p->c_arg.seqid;
752 p->o_res.server = p->o_arg.server;
753 p->o_res.access_request = p->o_arg.access;
754 nfs_fattr_init(&p->f_attr);
755 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
758 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
759 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
760 const struct iattr *attrs,
763 struct dentry *parent = dget_parent(dentry);
764 struct inode *dir = parent->d_inode;
765 struct nfs_server *server = NFS_SERVER(dir);
766 struct nfs4_opendata *p;
768 p = kzalloc(sizeof(*p), gfp_mask);
771 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
772 if (p->o_arg.seqid == NULL)
774 nfs_sb_active(dentry->d_sb);
775 p->dentry = dget(dentry);
778 atomic_inc(&sp->so_count);
779 p->o_arg.fh = NFS_FH(dir);
780 p->o_arg.open_flags = flags;
781 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
782 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
783 * will return permission denied for all bits until close */
784 if (!(flags & O_EXCL)) {
785 /* ask server to check for all possible rights as results
787 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
788 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
790 p->o_arg.clientid = server->nfs_client->cl_clientid;
791 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
792 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
793 p->o_arg.name = &dentry->d_name;
794 p->o_arg.server = server;
795 p->o_arg.bitmask = server->attr_bitmask;
796 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
797 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
798 if (attrs != NULL && attrs->ia_valid != 0) {
801 p->o_arg.u.attrs = &p->attrs;
802 memcpy(&p->attrs, attrs, sizeof(p->attrs));
805 verf[1] = current->pid;
806 memcpy(p->o_arg.u.verifier.data, verf,
807 sizeof(p->o_arg.u.verifier.data));
809 p->c_arg.fh = &p->o_res.fh;
810 p->c_arg.stateid = &p->o_res.stateid;
811 p->c_arg.seqid = p->o_arg.seqid;
812 nfs4_init_opendata_res(p);
822 static void nfs4_opendata_free(struct kref *kref)
824 struct nfs4_opendata *p = container_of(kref,
825 struct nfs4_opendata, kref);
826 struct super_block *sb = p->dentry->d_sb;
828 nfs_free_seqid(p->o_arg.seqid);
829 if (p->state != NULL)
830 nfs4_put_open_state(p->state);
831 nfs4_put_state_owner(p->owner);
835 nfs_fattr_free_names(&p->f_attr);
839 static void nfs4_opendata_put(struct nfs4_opendata *p)
842 kref_put(&p->kref, nfs4_opendata_free);
845 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
849 ret = rpc_wait_for_completion_task(task);
853 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
857 if (open_mode & (O_EXCL|O_TRUNC))
859 switch (mode & (FMODE_READ|FMODE_WRITE)) {
861 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
862 && state->n_rdonly != 0;
865 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
866 && state->n_wronly != 0;
868 case FMODE_READ|FMODE_WRITE:
869 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
870 && state->n_rdwr != 0;
876 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
878 if (delegation == NULL)
880 if ((delegation->type & fmode) != fmode)
882 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
884 nfs_mark_delegation_referenced(delegation);
888 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
897 case FMODE_READ|FMODE_WRITE:
900 nfs4_state_set_mode_locked(state, state->state | fmode);
903 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
905 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
906 nfs4_stateid_copy(&state->stateid, stateid);
907 nfs4_stateid_copy(&state->open_stateid, stateid);
910 set_bit(NFS_O_RDONLY_STATE, &state->flags);
913 set_bit(NFS_O_WRONLY_STATE, &state->flags);
915 case FMODE_READ|FMODE_WRITE:
916 set_bit(NFS_O_RDWR_STATE, &state->flags);
920 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
922 write_seqlock(&state->seqlock);
923 nfs_set_open_stateid_locked(state, stateid, fmode);
924 write_sequnlock(&state->seqlock);
927 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
930 * Protect the call to nfs4_state_set_mode_locked and
931 * serialise the stateid update
933 write_seqlock(&state->seqlock);
934 if (deleg_stateid != NULL) {
935 nfs4_stateid_copy(&state->stateid, deleg_stateid);
936 set_bit(NFS_DELEGATED_STATE, &state->flags);
938 if (open_stateid != NULL)
939 nfs_set_open_stateid_locked(state, open_stateid, fmode);
940 write_sequnlock(&state->seqlock);
941 spin_lock(&state->owner->so_lock);
942 update_open_stateflags(state, fmode);
943 spin_unlock(&state->owner->so_lock);
946 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
948 struct nfs_inode *nfsi = NFS_I(state->inode);
949 struct nfs_delegation *deleg_cur;
952 fmode &= (FMODE_READ|FMODE_WRITE);
955 deleg_cur = rcu_dereference(nfsi->delegation);
956 if (deleg_cur == NULL)
959 spin_lock(&deleg_cur->lock);
960 if (nfsi->delegation != deleg_cur ||
961 (deleg_cur->type & fmode) != fmode)
962 goto no_delegation_unlock;
964 if (delegation == NULL)
965 delegation = &deleg_cur->stateid;
966 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
967 goto no_delegation_unlock;
969 nfs_mark_delegation_referenced(deleg_cur);
970 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
972 no_delegation_unlock:
973 spin_unlock(&deleg_cur->lock);
977 if (!ret && open_stateid != NULL) {
978 __update_open_stateid(state, open_stateid, NULL, fmode);
986 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
988 struct nfs_delegation *delegation;
991 delegation = rcu_dereference(NFS_I(inode)->delegation);
992 if (delegation == NULL || (delegation->type & fmode) == fmode) {
997 nfs4_inode_return_delegation(inode);
1000 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1002 struct nfs4_state *state = opendata->state;
1003 struct nfs_inode *nfsi = NFS_I(state->inode);
1004 struct nfs_delegation *delegation;
1005 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1006 fmode_t fmode = opendata->o_arg.fmode;
1007 nfs4_stateid stateid;
1011 if (can_open_cached(state, fmode, open_mode)) {
1012 spin_lock(&state->owner->so_lock);
1013 if (can_open_cached(state, fmode, open_mode)) {
1014 update_open_stateflags(state, fmode);
1015 spin_unlock(&state->owner->so_lock);
1016 goto out_return_state;
1018 spin_unlock(&state->owner->so_lock);
1021 delegation = rcu_dereference(nfsi->delegation);
1022 if (!can_open_delegated(delegation, fmode)) {
1026 /* Save the delegation */
1027 nfs4_stateid_copy(&stateid, &delegation->stateid);
1029 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1034 /* Try to update the stateid using the delegation */
1035 if (update_open_stateid(state, NULL, &stateid, fmode))
1036 goto out_return_state;
1039 return ERR_PTR(ret);
1041 atomic_inc(&state->count);
1046 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1048 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1049 struct nfs_delegation *delegation;
1050 int delegation_flags = 0;
1053 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1055 delegation_flags = delegation->flags;
1057 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1058 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1059 "returning a delegation for "
1060 "OPEN(CLAIM_DELEGATE_CUR)\n",
1062 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1063 nfs_inode_set_delegation(state->inode,
1064 data->owner->so_cred,
1067 nfs_inode_reclaim_delegation(state->inode,
1068 data->owner->so_cred,
1073 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1074 * and update the nfs4_state.
1076 static struct nfs4_state *
1077 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1079 struct inode *inode = data->state->inode;
1080 struct nfs4_state *state = data->state;
1083 if (!data->rpc_done) {
1084 ret = data->rpc_status;
1089 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1090 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1091 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1095 state = nfs4_get_open_state(inode, data->owner);
1099 ret = nfs_refresh_inode(inode, &data->f_attr);
1103 if (data->o_res.delegation_type != 0)
1104 nfs4_opendata_check_deleg(data, state);
1105 update_open_stateid(state, &data->o_res.stateid, NULL,
1110 return ERR_PTR(ret);
1114 static struct nfs4_state *
1115 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1117 struct inode *inode;
1118 struct nfs4_state *state = NULL;
1121 if (!data->rpc_done) {
1122 state = nfs4_try_open_cached(data);
1127 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1129 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1130 ret = PTR_ERR(inode);
1134 state = nfs4_get_open_state(inode, data->owner);
1137 if (data->o_res.delegation_type != 0)
1138 nfs4_opendata_check_deleg(data, state);
1139 update_open_stateid(state, &data->o_res.stateid, NULL,
1147 return ERR_PTR(ret);
1150 static struct nfs4_state *
1151 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1153 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1154 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1155 return _nfs4_opendata_to_nfs4_state(data);
1158 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1160 struct nfs_inode *nfsi = NFS_I(state->inode);
1161 struct nfs_open_context *ctx;
1163 spin_lock(&state->inode->i_lock);
1164 list_for_each_entry(ctx, &nfsi->open_files, list) {
1165 if (ctx->state != state)
1167 get_nfs_open_context(ctx);
1168 spin_unlock(&state->inode->i_lock);
1171 spin_unlock(&state->inode->i_lock);
1172 return ERR_PTR(-ENOENT);
1175 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1177 struct nfs4_opendata *opendata;
1179 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1180 if (opendata == NULL)
1181 return ERR_PTR(-ENOMEM);
1182 opendata->state = state;
1183 atomic_inc(&state->count);
1187 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1189 struct nfs4_state *newstate;
1192 opendata->o_arg.open_flags = 0;
1193 opendata->o_arg.fmode = fmode;
1194 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1195 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1196 nfs4_init_opendata_res(opendata);
1197 ret = _nfs4_recover_proc_open(opendata);
1200 newstate = nfs4_opendata_to_nfs4_state(opendata);
1201 if (IS_ERR(newstate))
1202 return PTR_ERR(newstate);
1203 nfs4_close_state(newstate, fmode);
1208 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1210 struct nfs4_state *newstate;
1213 /* memory barrier prior to reading state->n_* */
1214 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1216 if (state->n_rdwr != 0) {
1217 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1218 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1221 if (newstate != state)
1224 if (state->n_wronly != 0) {
1225 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1226 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1229 if (newstate != state)
1232 if (state->n_rdonly != 0) {
1233 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1234 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1237 if (newstate != state)
1241 * We may have performed cached opens for all three recoveries.
1242 * Check if we need to update the current stateid.
1244 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1245 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1246 write_seqlock(&state->seqlock);
1247 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1248 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1249 write_sequnlock(&state->seqlock);
1256 * reclaim state on the server after a reboot.
1258 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1260 struct nfs_delegation *delegation;
1261 struct nfs4_opendata *opendata;
1262 fmode_t delegation_type = 0;
1265 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1266 if (IS_ERR(opendata))
1267 return PTR_ERR(opendata);
1268 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1269 opendata->o_arg.fh = NFS_FH(state->inode);
1271 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1272 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1273 delegation_type = delegation->type;
1275 opendata->o_arg.u.delegation_type = delegation_type;
1276 status = nfs4_open_recover(opendata, state);
1277 nfs4_opendata_put(opendata);
1281 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1283 struct nfs_server *server = NFS_SERVER(state->inode);
1284 struct nfs4_exception exception = { };
1287 err = _nfs4_do_open_reclaim(ctx, state);
1288 if (err != -NFS4ERR_DELAY)
1290 nfs4_handle_exception(server, err, &exception);
1291 } while (exception.retry);
1295 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1297 struct nfs_open_context *ctx;
1300 ctx = nfs4_state_find_open_context(state);
1302 return PTR_ERR(ctx);
1303 ret = nfs4_do_open_reclaim(ctx, state);
1304 put_nfs_open_context(ctx);
1308 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1310 struct nfs4_opendata *opendata;
1313 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1314 if (IS_ERR(opendata))
1315 return PTR_ERR(opendata);
1316 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1317 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1318 ret = nfs4_open_recover(opendata, state);
1319 nfs4_opendata_put(opendata);
1323 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1325 struct nfs4_exception exception = { };
1326 struct nfs_server *server = NFS_SERVER(state->inode);
1329 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1335 case -NFS4ERR_BADSESSION:
1336 case -NFS4ERR_BADSLOT:
1337 case -NFS4ERR_BAD_HIGH_SLOT:
1338 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1339 case -NFS4ERR_DEADSESSION:
1340 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1342 case -NFS4ERR_STALE_CLIENTID:
1343 case -NFS4ERR_STALE_STATEID:
1344 case -NFS4ERR_EXPIRED:
1345 /* Don't recall a delegation if it was lost */
1346 nfs4_schedule_lease_recovery(server->nfs_client);
1350 * The show must go on: exit, but mark the
1351 * stateid as needing recovery.
1353 case -NFS4ERR_DELEG_REVOKED:
1354 case -NFS4ERR_ADMIN_REVOKED:
1355 case -NFS4ERR_BAD_STATEID:
1356 nfs_inode_find_state_and_recover(state->inode,
1358 nfs4_schedule_stateid_recovery(server, state);
1363 err = nfs4_handle_exception(server, err, &exception);
1364 } while (exception.retry);
1369 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1371 struct nfs4_opendata *data = calldata;
1373 data->rpc_status = task->tk_status;
1374 if (data->rpc_status == 0) {
1375 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1376 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1377 renew_lease(data->o_res.server, data->timestamp);
1382 static void nfs4_open_confirm_release(void *calldata)
1384 struct nfs4_opendata *data = calldata;
1385 struct nfs4_state *state = NULL;
1387 /* If this request hasn't been cancelled, do nothing */
1388 if (data->cancelled == 0)
1390 /* In case of error, no cleanup! */
1391 if (!data->rpc_done)
1393 state = nfs4_opendata_to_nfs4_state(data);
1395 nfs4_close_state(state, data->o_arg.fmode);
1397 nfs4_opendata_put(data);
1400 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1401 .rpc_call_done = nfs4_open_confirm_done,
1402 .rpc_release = nfs4_open_confirm_release,
1406 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1408 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1410 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1411 struct rpc_task *task;
1412 struct rpc_message msg = {
1413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1414 .rpc_argp = &data->c_arg,
1415 .rpc_resp = &data->c_res,
1416 .rpc_cred = data->owner->so_cred,
1418 struct rpc_task_setup task_setup_data = {
1419 .rpc_client = server->client,
1420 .rpc_message = &msg,
1421 .callback_ops = &nfs4_open_confirm_ops,
1422 .callback_data = data,
1423 .workqueue = nfsiod_workqueue,
1424 .flags = RPC_TASK_ASYNC,
1428 kref_get(&data->kref);
1430 data->rpc_status = 0;
1431 data->timestamp = jiffies;
1432 task = rpc_run_task(&task_setup_data);
1434 return PTR_ERR(task);
1435 status = nfs4_wait_for_completion_rpc_task(task);
1437 data->cancelled = 1;
1440 status = data->rpc_status;
1445 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1447 struct nfs4_opendata *data = calldata;
1448 struct nfs4_state_owner *sp = data->owner;
1450 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1453 * Check if we still need to send an OPEN call, or if we can use
1454 * a delegation instead.
1456 if (data->state != NULL) {
1457 struct nfs_delegation *delegation;
1459 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1462 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1463 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1464 can_open_delegated(delegation, data->o_arg.fmode))
1465 goto unlock_no_action;
1468 /* Update client id. */
1469 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1470 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1471 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1472 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1473 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1475 data->timestamp = jiffies;
1476 if (nfs4_setup_sequence(data->o_arg.server,
1477 &data->o_arg.seq_args,
1478 &data->o_res.seq_res,
1480 nfs_release_seqid(data->o_arg.seqid);
1485 task->tk_action = NULL;
1486 nfs4_sequence_done(task, &data->o_res.seq_res);
1489 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1491 struct nfs4_opendata *data = calldata;
1493 data->rpc_status = task->tk_status;
1495 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1498 if (task->tk_status == 0) {
1499 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1500 switch (data->o_res.f_attr->mode & S_IFMT) {
1504 data->rpc_status = -ELOOP;
1507 data->rpc_status = -EISDIR;
1510 data->rpc_status = -ENOTDIR;
1513 renew_lease(data->o_res.server, data->timestamp);
1514 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1515 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1520 static void nfs4_open_release(void *calldata)
1522 struct nfs4_opendata *data = calldata;
1523 struct nfs4_state *state = NULL;
1525 /* If this request hasn't been cancelled, do nothing */
1526 if (data->cancelled == 0)
1528 /* In case of error, no cleanup! */
1529 if (data->rpc_status != 0 || !data->rpc_done)
1531 /* In case we need an open_confirm, no cleanup! */
1532 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1534 state = nfs4_opendata_to_nfs4_state(data);
1536 nfs4_close_state(state, data->o_arg.fmode);
1538 nfs4_opendata_put(data);
1541 static const struct rpc_call_ops nfs4_open_ops = {
1542 .rpc_call_prepare = nfs4_open_prepare,
1543 .rpc_call_done = nfs4_open_done,
1544 .rpc_release = nfs4_open_release,
1547 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1549 struct inode *dir = data->dir->d_inode;
1550 struct nfs_server *server = NFS_SERVER(dir);
1551 struct nfs_openargs *o_arg = &data->o_arg;
1552 struct nfs_openres *o_res = &data->o_res;
1553 struct rpc_task *task;
1554 struct rpc_message msg = {
1555 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1558 .rpc_cred = data->owner->so_cred,
1560 struct rpc_task_setup task_setup_data = {
1561 .rpc_client = server->client,
1562 .rpc_message = &msg,
1563 .callback_ops = &nfs4_open_ops,
1564 .callback_data = data,
1565 .workqueue = nfsiod_workqueue,
1566 .flags = RPC_TASK_ASYNC,
1570 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1571 kref_get(&data->kref);
1573 data->rpc_status = 0;
1574 data->cancelled = 0;
1576 nfs4_set_sequence_privileged(&o_arg->seq_args);
1577 task = rpc_run_task(&task_setup_data);
1579 return PTR_ERR(task);
1580 status = nfs4_wait_for_completion_rpc_task(task);
1582 data->cancelled = 1;
1585 status = data->rpc_status;
1591 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1593 struct inode *dir = data->dir->d_inode;
1594 struct nfs_openres *o_res = &data->o_res;
1597 status = nfs4_run_open_task(data, 1);
1598 if (status != 0 || !data->rpc_done)
1601 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1603 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1604 status = _nfs4_proc_open_confirm(data);
1612 static int nfs4_opendata_access(struct rpc_cred *cred,
1613 struct nfs4_opendata *opendata,
1614 struct nfs4_state *state, fmode_t fmode)
1616 struct nfs_access_entry cache;
1619 /* access call failed or for some reason the server doesn't
1620 * support any access modes -- defer access call until later */
1621 if (opendata->o_res.access_supported == 0)
1625 /* don't check MAY_WRITE - a newly created file may not have
1626 * write mode bits, but POSIX allows the creating process to write */
1627 if (fmode & FMODE_READ)
1629 if (fmode & FMODE_EXEC)
1633 cache.jiffies = jiffies;
1634 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1635 nfs_access_add_cache(state->inode, &cache);
1637 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1640 /* even though OPEN succeeded, access is denied. Close the file */
1641 nfs4_close_state(state, fmode);
1646 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1648 static int _nfs4_proc_open(struct nfs4_opendata *data)
1650 struct inode *dir = data->dir->d_inode;
1651 struct nfs_server *server = NFS_SERVER(dir);
1652 struct nfs_openargs *o_arg = &data->o_arg;
1653 struct nfs_openres *o_res = &data->o_res;
1656 status = nfs4_run_open_task(data, 0);
1657 if (!data->rpc_done)
1660 if (status == -NFS4ERR_BADNAME &&
1661 !(o_arg->open_flags & O_CREAT))
1666 nfs_fattr_map_and_free_names(server, &data->f_attr);
1668 if (o_arg->open_flags & O_CREAT)
1669 update_changeattr(dir, &o_res->cinfo);
1670 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1671 server->caps &= ~NFS_CAP_POSIX_LOCK;
1672 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1673 status = _nfs4_proc_open_confirm(data);
1677 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1678 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1682 static int nfs4_recover_expired_lease(struct nfs_server *server)
1684 return nfs4_client_recover_expired_lease(server->nfs_client);
1689 * reclaim state on the server after a network partition.
1690 * Assumes caller holds the appropriate lock
1692 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1694 struct nfs4_opendata *opendata;
1697 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1698 if (IS_ERR(opendata))
1699 return PTR_ERR(opendata);
1700 ret = nfs4_open_recover(opendata, state);
1702 d_drop(ctx->dentry);
1703 nfs4_opendata_put(opendata);
1707 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1709 struct nfs_server *server = NFS_SERVER(state->inode);
1710 struct nfs4_exception exception = { };
1714 err = _nfs4_open_expired(ctx, state);
1718 case -NFS4ERR_GRACE:
1719 case -NFS4ERR_DELAY:
1720 nfs4_handle_exception(server, err, &exception);
1723 } while (exception.retry);
1728 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1730 struct nfs_open_context *ctx;
1733 ctx = nfs4_state_find_open_context(state);
1735 return PTR_ERR(ctx);
1736 ret = nfs4_do_open_expired(ctx, state);
1737 put_nfs_open_context(ctx);
1741 #if defined(CONFIG_NFS_V4_1)
1742 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1744 struct nfs_server *server = NFS_SERVER(state->inode);
1745 nfs4_stateid *stateid = &state->stateid;
1748 /* If a state reset has been done, test_stateid is unneeded */
1749 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1752 status = nfs41_test_stateid(server, stateid);
1753 if (status != NFS_OK) {
1754 /* Free the stateid unless the server explicitly
1755 * informs us the stateid is unrecognized. */
1756 if (status != -NFS4ERR_BAD_STATEID)
1757 nfs41_free_stateid(server, stateid);
1758 nfs_remove_bad_delegation(state->inode);
1760 write_seqlock(&state->seqlock);
1761 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1762 write_sequnlock(&state->seqlock);
1763 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1768 * nfs41_check_open_stateid - possibly free an open stateid
1770 * @state: NFSv4 state for an inode
1772 * Returns NFS_OK if recovery for this stateid is now finished.
1773 * Otherwise a negative NFS4ERR value is returned.
1775 static int nfs41_check_open_stateid(struct nfs4_state *state)
1777 struct nfs_server *server = NFS_SERVER(state->inode);
1778 nfs4_stateid *stateid = &state->open_stateid;
1781 /* If a state reset has been done, test_stateid is unneeded */
1782 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1783 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1784 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1785 return -NFS4ERR_BAD_STATEID;
1787 status = nfs41_test_stateid(server, stateid);
1788 if (status != NFS_OK) {
1789 /* Free the stateid unless the server explicitly
1790 * informs us the stateid is unrecognized. */
1791 if (status != -NFS4ERR_BAD_STATEID)
1792 nfs41_free_stateid(server, stateid);
1794 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1795 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1796 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1801 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1805 nfs41_clear_delegation_stateid(state);
1806 status = nfs41_check_open_stateid(state);
1807 if (status != NFS_OK)
1808 status = nfs4_open_expired(sp, state);
1814 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1815 * fields corresponding to attributes that were used to store the verifier.
1816 * Make sure we clobber those fields in the later setattr call
1818 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1820 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1821 !(sattr->ia_valid & ATTR_ATIME_SET))
1822 sattr->ia_valid |= ATTR_ATIME;
1824 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1825 !(sattr->ia_valid & ATTR_MTIME_SET))
1826 sattr->ia_valid |= ATTR_MTIME;
1830 * Returns a referenced nfs4_state
1832 static int _nfs4_do_open(struct inode *dir,
1833 struct dentry *dentry,
1836 struct iattr *sattr,
1837 struct rpc_cred *cred,
1838 struct nfs4_state **res,
1839 struct nfs4_threshold **ctx_th)
1841 struct nfs4_state_owner *sp;
1842 struct nfs4_state *state = NULL;
1843 struct nfs_server *server = NFS_SERVER(dir);
1844 struct nfs4_opendata *opendata;
1847 /* Protect against reboot recovery conflicts */
1849 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1851 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1854 status = nfs4_recover_expired_lease(server);
1856 goto err_put_state_owner;
1857 if (dentry->d_inode != NULL)
1858 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1860 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1861 if (opendata == NULL)
1862 goto err_put_state_owner;
1864 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1865 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1866 if (!opendata->f_attr.mdsthreshold)
1867 goto err_opendata_put;
1868 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
1870 if (dentry->d_inode != NULL)
1871 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1873 status = _nfs4_proc_open(opendata);
1875 goto err_opendata_put;
1877 state = nfs4_opendata_to_nfs4_state(opendata);
1878 status = PTR_ERR(state);
1880 goto err_opendata_put;
1881 if (server->caps & NFS_CAP_POSIX_LOCK)
1882 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1884 status = nfs4_opendata_access(cred, opendata, state, fmode);
1886 goto err_opendata_put;
1888 if (opendata->o_arg.open_flags & O_EXCL) {
1889 nfs4_exclusive_attrset(opendata, sattr);
1891 nfs_fattr_init(opendata->o_res.f_attr);
1892 status = nfs4_do_setattr(state->inode, cred,
1893 opendata->o_res.f_attr, sattr,
1896 nfs_setattr_update_inode(state->inode, sattr);
1897 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1900 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1901 *ctx_th = opendata->f_attr.mdsthreshold;
1903 kfree(opendata->f_attr.mdsthreshold);
1904 opendata->f_attr.mdsthreshold = NULL;
1906 nfs4_opendata_put(opendata);
1907 nfs4_put_state_owner(sp);
1911 kfree(opendata->f_attr.mdsthreshold);
1912 nfs4_opendata_put(opendata);
1913 err_put_state_owner:
1914 nfs4_put_state_owner(sp);
1921 static struct nfs4_state *nfs4_do_open(struct inode *dir,
1922 struct dentry *dentry,
1925 struct iattr *sattr,
1926 struct rpc_cred *cred,
1927 struct nfs4_threshold **ctx_th)
1929 struct nfs4_exception exception = { };
1930 struct nfs4_state *res;
1933 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1935 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1939 /* NOTE: BAD_SEQID means the server and client disagree about the
1940 * book-keeping w.r.t. state-changing operations
1941 * (OPEN/CLOSE/LOCK/LOCKU...)
1942 * It is actually a sign of a bug on the client or on the server.
1944 * If we receive a BAD_SEQID error in the particular case of
1945 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1946 * have unhashed the old state_owner for us, and that we can
1947 * therefore safely retry using a new one. We should still warn
1948 * the user though...
1950 if (status == -NFS4ERR_BAD_SEQID) {
1951 pr_warn_ratelimited("NFS: v4 server %s "
1952 " returned a bad sequence-id error!\n",
1953 NFS_SERVER(dir)->nfs_client->cl_hostname);
1954 exception.retry = 1;
1958 * BAD_STATEID on OPEN means that the server cancelled our
1959 * state before it received the OPEN_CONFIRM.
1960 * Recover by retrying the request as per the discussion
1961 * on Page 181 of RFC3530.
1963 if (status == -NFS4ERR_BAD_STATEID) {
1964 exception.retry = 1;
1967 if (status == -EAGAIN) {
1968 /* We must have found a delegation */
1969 exception.retry = 1;
1972 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1973 status, &exception));
1974 } while (exception.retry);
1978 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1979 struct nfs_fattr *fattr, struct iattr *sattr,
1980 struct nfs4_state *state)
1982 struct nfs_server *server = NFS_SERVER(inode);
1983 struct nfs_setattrargs arg = {
1984 .fh = NFS_FH(inode),
1987 .bitmask = server->attr_bitmask,
1989 struct nfs_setattrres res = {
1993 struct rpc_message msg = {
1994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1999 unsigned long timestamp = jiffies;
2002 nfs_fattr_init(fattr);
2004 if (state != NULL) {
2005 struct nfs_lockowner lockowner = {
2006 .l_owner = current->files,
2007 .l_pid = current->tgid,
2009 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2011 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2013 /* Use that stateid */
2015 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2017 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2018 if (status == 0 && state != NULL)
2019 renew_lease(server, timestamp);
2023 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2024 struct nfs_fattr *fattr, struct iattr *sattr,
2025 struct nfs4_state *state)
2027 struct nfs_server *server = NFS_SERVER(inode);
2028 struct nfs4_exception exception = {
2034 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2036 case -NFS4ERR_OPENMODE:
2037 if (state && !(state->state & FMODE_WRITE)) {
2039 if (sattr->ia_valid & ATTR_OPEN)
2044 err = nfs4_handle_exception(server, err, &exception);
2045 } while (exception.retry);
2050 struct nfs4_closedata {
2051 struct inode *inode;
2052 struct nfs4_state *state;
2053 struct nfs_closeargs arg;
2054 struct nfs_closeres res;
2055 struct nfs_fattr fattr;
2056 unsigned long timestamp;
2061 static void nfs4_free_closedata(void *data)
2063 struct nfs4_closedata *calldata = data;
2064 struct nfs4_state_owner *sp = calldata->state->owner;
2065 struct super_block *sb = calldata->state->inode->i_sb;
2068 pnfs_roc_release(calldata->state->inode);
2069 nfs4_put_open_state(calldata->state);
2070 nfs_free_seqid(calldata->arg.seqid);
2071 nfs4_put_state_owner(sp);
2072 nfs_sb_deactive_async(sb);
2076 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2079 spin_lock(&state->owner->so_lock);
2080 if (!(fmode & FMODE_READ))
2081 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2082 if (!(fmode & FMODE_WRITE))
2083 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2084 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2085 spin_unlock(&state->owner->so_lock);
2088 static void nfs4_close_done(struct rpc_task *task, void *data)
2090 struct nfs4_closedata *calldata = data;
2091 struct nfs4_state *state = calldata->state;
2092 struct nfs_server *server = NFS_SERVER(calldata->inode);
2094 dprintk("%s: begin!\n", __func__);
2095 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2097 /* hmm. we are done with the inode, and in the process of freeing
2098 * the state_owner. we keep this around to process errors
2100 switch (task->tk_status) {
2103 pnfs_roc_set_barrier(state->inode,
2104 calldata->roc_barrier);
2105 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2106 renew_lease(server, calldata->timestamp);
2107 nfs4_close_clear_stateid_flags(state,
2108 calldata->arg.fmode);
2110 case -NFS4ERR_STALE_STATEID:
2111 case -NFS4ERR_OLD_STATEID:
2112 case -NFS4ERR_BAD_STATEID:
2113 case -NFS4ERR_EXPIRED:
2114 if (calldata->arg.fmode == 0)
2117 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2118 rpc_restart_call_prepare(task);
2120 nfs_release_seqid(calldata->arg.seqid);
2121 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2122 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2125 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2127 struct nfs4_closedata *calldata = data;
2128 struct nfs4_state *state = calldata->state;
2129 struct inode *inode = calldata->inode;
2132 dprintk("%s: begin!\n", __func__);
2133 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2136 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2137 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2138 spin_lock(&state->owner->so_lock);
2139 /* Calculate the change in open mode */
2140 if (state->n_rdwr == 0) {
2141 if (state->n_rdonly == 0) {
2142 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2143 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2144 calldata->arg.fmode &= ~FMODE_READ;
2146 if (state->n_wronly == 0) {
2147 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2148 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2149 calldata->arg.fmode &= ~FMODE_WRITE;
2152 spin_unlock(&state->owner->so_lock);
2155 /* Note: exit _without_ calling nfs4_close_done */
2156 task->tk_action = NULL;
2157 nfs4_sequence_done(task, &calldata->res.seq_res);
2161 if (calldata->arg.fmode == 0) {
2162 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2163 if (calldata->roc &&
2164 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
2168 nfs_fattr_init(calldata->res.fattr);
2169 calldata->timestamp = jiffies;
2170 if (nfs4_setup_sequence(NFS_SERVER(inode),
2171 &calldata->arg.seq_args,
2172 &calldata->res.seq_res,
2174 nfs_release_seqid(calldata->arg.seqid);
2176 dprintk("%s: done!\n", __func__);
2179 static const struct rpc_call_ops nfs4_close_ops = {
2180 .rpc_call_prepare = nfs4_close_prepare,
2181 .rpc_call_done = nfs4_close_done,
2182 .rpc_release = nfs4_free_closedata,
2186 * It is possible for data to be read/written from a mem-mapped file
2187 * after the sys_close call (which hits the vfs layer as a flush).
2188 * This means that we can't safely call nfsv4 close on a file until
2189 * the inode is cleared. This in turn means that we are not good
2190 * NFSv4 citizens - we do not indicate to the server to update the file's
2191 * share state even when we are done with one of the three share
2192 * stateid's in the inode.
2194 * NOTE: Caller must be holding the sp->so_owner semaphore!
2196 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2198 struct nfs_server *server = NFS_SERVER(state->inode);
2199 struct nfs4_closedata *calldata;
2200 struct nfs4_state_owner *sp = state->owner;
2201 struct rpc_task *task;
2202 struct rpc_message msg = {
2203 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2204 .rpc_cred = state->owner->so_cred,
2206 struct rpc_task_setup task_setup_data = {
2207 .rpc_client = server->client,
2208 .rpc_message = &msg,
2209 .callback_ops = &nfs4_close_ops,
2210 .workqueue = nfsiod_workqueue,
2211 .flags = RPC_TASK_ASYNC,
2213 int status = -ENOMEM;
2215 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2216 if (calldata == NULL)
2218 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2219 calldata->inode = state->inode;
2220 calldata->state = state;
2221 calldata->arg.fh = NFS_FH(state->inode);
2222 calldata->arg.stateid = &state->open_stateid;
2223 /* Serialization for the sequence id */
2224 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2225 if (calldata->arg.seqid == NULL)
2226 goto out_free_calldata;
2227 calldata->arg.fmode = 0;
2228 calldata->arg.bitmask = server->cache_consistency_bitmask;
2229 calldata->res.fattr = &calldata->fattr;
2230 calldata->res.seqid = calldata->arg.seqid;
2231 calldata->res.server = server;
2232 calldata->roc = pnfs_roc(state->inode);
2233 nfs_sb_active(calldata->inode->i_sb);
2235 msg.rpc_argp = &calldata->arg;
2236 msg.rpc_resp = &calldata->res;
2237 task_setup_data.callback_data = calldata;
2238 task = rpc_run_task(&task_setup_data);
2240 return PTR_ERR(task);
2243 status = rpc_wait_for_completion_task(task);
2249 nfs4_put_open_state(state);
2250 nfs4_put_state_owner(sp);
2254 static struct inode *
2255 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2257 struct nfs4_state *state;
2259 /* Protect against concurrent sillydeletes */
2260 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2261 ctx->cred, &ctx->mdsthreshold);
2263 return ERR_CAST(state);
2265 return igrab(state->inode);
2268 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2270 if (ctx->state == NULL)
2273 nfs4_close_sync(ctx->state, ctx->mode);
2275 nfs4_close_state(ctx->state, ctx->mode);
2278 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2280 struct nfs4_server_caps_arg args = {
2283 struct nfs4_server_caps_res res = {};
2284 struct rpc_message msg = {
2285 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2291 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2293 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2294 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2295 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2296 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2297 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2298 NFS_CAP_CTIME|NFS_CAP_MTIME);
2299 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2300 server->caps |= NFS_CAP_ACLS;
2301 if (res.has_links != 0)
2302 server->caps |= NFS_CAP_HARDLINKS;
2303 if (res.has_symlinks != 0)
2304 server->caps |= NFS_CAP_SYMLINKS;
2305 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2306 server->caps |= NFS_CAP_FILEID;
2307 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2308 server->caps |= NFS_CAP_MODE;
2309 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2310 server->caps |= NFS_CAP_NLINK;
2311 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2312 server->caps |= NFS_CAP_OWNER;
2313 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2314 server->caps |= NFS_CAP_OWNER_GROUP;
2315 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2316 server->caps |= NFS_CAP_ATIME;
2317 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2318 server->caps |= NFS_CAP_CTIME;
2319 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2320 server->caps |= NFS_CAP_MTIME;
2322 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2323 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2324 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2325 server->acl_bitmask = res.acl_bitmask;
2326 server->fh_expire_type = res.fh_expire_type;
2332 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2334 struct nfs4_exception exception = { };
2337 err = nfs4_handle_exception(server,
2338 _nfs4_server_capabilities(server, fhandle),
2340 } while (exception.retry);
2344 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2345 struct nfs_fsinfo *info)
2347 struct nfs4_lookup_root_arg args = {
2348 .bitmask = nfs4_fattr_bitmap,
2350 struct nfs4_lookup_res res = {
2352 .fattr = info->fattr,
2355 struct rpc_message msg = {
2356 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2361 nfs_fattr_init(info->fattr);
2362 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2365 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2366 struct nfs_fsinfo *info)
2368 struct nfs4_exception exception = { };
2371 err = _nfs4_lookup_root(server, fhandle, info);
2374 case -NFS4ERR_WRONGSEC:
2377 err = nfs4_handle_exception(server, err, &exception);
2379 } while (exception.retry);
2384 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2385 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2387 struct rpc_auth *auth;
2390 auth = rpcauth_create(flavor, server->client);
2395 ret = nfs4_lookup_root(server, fhandle, info);
2400 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2401 struct nfs_fsinfo *info)
2403 int i, len, status = 0;
2404 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2406 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2410 for (i = 0; i < len; i++) {
2411 /* AUTH_UNIX is the default flavor if none was specified,
2412 * thus has already been tried. */
2413 if (flav_array[i] == RPC_AUTH_UNIX)
2416 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2417 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2422 * -EACCESS could mean that the user doesn't have correct permissions
2423 * to access the mount. It could also mean that we tried to mount
2424 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2425 * existing mount programs don't handle -EACCES very well so it should
2426 * be mapped to -EPERM instead.
2428 if (status == -EACCES)
2434 * get the file handle for the "/" directory on the server
2436 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2437 struct nfs_fsinfo *info)
2439 int minor_version = server->nfs_client->cl_minorversion;
2440 int status = nfs4_lookup_root(server, fhandle, info);
2441 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2443 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2444 * by nfs4_map_errors() as this function exits.
2446 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2448 status = nfs4_server_capabilities(server, fhandle);
2450 status = nfs4_do_fsinfo(server, fhandle, info);
2451 return nfs4_map_errors(status);
2454 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2455 struct nfs_fsinfo *info)
2458 struct nfs_fattr *fattr = info->fattr;
2460 error = nfs4_server_capabilities(server, mntfh);
2462 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2466 error = nfs4_proc_getattr(server, mntfh, fattr);
2468 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2472 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2473 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2474 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2480 * Get locations and (maybe) other attributes of a referral.
2481 * Note that we'll actually follow the referral later when
2482 * we detect fsid mismatch in inode revalidation
2484 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2485 const struct qstr *name, struct nfs_fattr *fattr,
2486 struct nfs_fh *fhandle)
2488 int status = -ENOMEM;
2489 struct page *page = NULL;
2490 struct nfs4_fs_locations *locations = NULL;
2492 page = alloc_page(GFP_KERNEL);
2495 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2496 if (locations == NULL)
2499 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2502 /* Make sure server returned a different fsid for the referral */
2503 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2504 dprintk("%s: server did not return a different fsid for"
2505 " a referral at %s\n", __func__, name->name);
2509 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2510 nfs_fixup_referral_attributes(&locations->fattr);
2512 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2513 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2514 memset(fhandle, 0, sizeof(struct nfs_fh));
2522 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2524 struct nfs4_getattr_arg args = {
2526 .bitmask = server->attr_bitmask,
2528 struct nfs4_getattr_res res = {
2532 struct rpc_message msg = {
2533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2538 nfs_fattr_init(fattr);
2539 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2542 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2544 struct nfs4_exception exception = { };
2547 err = nfs4_handle_exception(server,
2548 _nfs4_proc_getattr(server, fhandle, fattr),
2550 } while (exception.retry);
2555 * The file is not closed if it is opened due to the a request to change
2556 * the size of the file. The open call will not be needed once the
2557 * VFS layer lookup-intents are implemented.
2559 * Close is called when the inode is destroyed.
2560 * If we haven't opened the file for O_WRONLY, we
2561 * need to in the size_change case to obtain a stateid.
2564 * Because OPEN is always done by name in nfsv4, it is
2565 * possible that we opened a different file by the same
2566 * name. We can recognize this race condition, but we
2567 * can't do anything about it besides returning an error.
2569 * This will be fixed with VFS changes (lookup-intent).
2572 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2573 struct iattr *sattr)
2575 struct inode *inode = dentry->d_inode;
2576 struct rpc_cred *cred = NULL;
2577 struct nfs4_state *state = NULL;
2580 if (pnfs_ld_layoutret_on_setattr(inode))
2581 pnfs_return_layout(inode);
2583 nfs_fattr_init(fattr);
2585 /* Deal with open(O_TRUNC) */
2586 if (sattr->ia_valid & ATTR_OPEN)
2587 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2589 /* Optimization: if the end result is no change, don't RPC */
2590 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2593 /* Search for an existing open(O_WRITE) file */
2594 if (sattr->ia_valid & ATTR_FILE) {
2595 struct nfs_open_context *ctx;
2597 ctx = nfs_file_open_context(sattr->ia_file);
2604 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2606 nfs_setattr_update_inode(inode, sattr);
2610 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2611 const struct qstr *name, struct nfs_fh *fhandle,
2612 struct nfs_fattr *fattr)
2614 struct nfs_server *server = NFS_SERVER(dir);
2616 struct nfs4_lookup_arg args = {
2617 .bitmask = server->attr_bitmask,
2618 .dir_fh = NFS_FH(dir),
2621 struct nfs4_lookup_res res = {
2626 struct rpc_message msg = {
2627 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2632 nfs_fattr_init(fattr);
2634 dprintk("NFS call lookup %s\n", name->name);
2635 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2636 dprintk("NFS reply lookup: %d\n", status);
2640 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2642 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2643 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2644 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2648 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2649 struct qstr *name, struct nfs_fh *fhandle,
2650 struct nfs_fattr *fattr)
2652 struct nfs4_exception exception = { };
2653 struct rpc_clnt *client = *clnt;
2656 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2658 case -NFS4ERR_BADNAME:
2661 case -NFS4ERR_MOVED:
2662 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2664 case -NFS4ERR_WRONGSEC:
2666 if (client != *clnt)
2669 client = nfs4_create_sec_client(client, dir, name);
2671 return PTR_ERR(client);
2673 exception.retry = 1;
2676 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2678 } while (exception.retry);
2683 else if (client != *clnt)
2684 rpc_shutdown_client(client);
2689 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2690 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2693 struct rpc_clnt *client = NFS_CLIENT(dir);
2695 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2696 if (client != NFS_CLIENT(dir)) {
2697 rpc_shutdown_client(client);
2698 nfs_fixup_secinfo_attributes(fattr);
2704 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2705 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2708 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2710 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2712 rpc_shutdown_client(client);
2713 return ERR_PTR(status);
2718 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2720 struct nfs_server *server = NFS_SERVER(inode);
2721 struct nfs4_accessargs args = {
2722 .fh = NFS_FH(inode),
2723 .bitmask = server->cache_consistency_bitmask,
2725 struct nfs4_accessres res = {
2728 struct rpc_message msg = {
2729 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2732 .rpc_cred = entry->cred,
2734 int mode = entry->mask;
2738 * Determine which access bits we want to ask for...
2740 if (mode & MAY_READ)
2741 args.access |= NFS4_ACCESS_READ;
2742 if (S_ISDIR(inode->i_mode)) {
2743 if (mode & MAY_WRITE)
2744 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2745 if (mode & MAY_EXEC)
2746 args.access |= NFS4_ACCESS_LOOKUP;
2748 if (mode & MAY_WRITE)
2749 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2750 if (mode & MAY_EXEC)
2751 args.access |= NFS4_ACCESS_EXECUTE;
2754 res.fattr = nfs_alloc_fattr();
2755 if (res.fattr == NULL)
2758 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2760 nfs_access_set_mask(entry, res.access);
2761 nfs_refresh_inode(inode, res.fattr);
2763 nfs_free_fattr(res.fattr);
2767 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2769 struct nfs4_exception exception = { };
2772 err = nfs4_handle_exception(NFS_SERVER(inode),
2773 _nfs4_proc_access(inode, entry),
2775 } while (exception.retry);
2780 * TODO: For the time being, we don't try to get any attributes
2781 * along with any of the zero-copy operations READ, READDIR,
2784 * In the case of the first three, we want to put the GETATTR
2785 * after the read-type operation -- this is because it is hard
2786 * to predict the length of a GETATTR response in v4, and thus
2787 * align the READ data correctly. This means that the GETATTR
2788 * may end up partially falling into the page cache, and we should
2789 * shift it into the 'tail' of the xdr_buf before processing.
2790 * To do this efficiently, we need to know the total length
2791 * of data received, which doesn't seem to be available outside
2794 * In the case of WRITE, we also want to put the GETATTR after
2795 * the operation -- in this case because we want to make sure
2796 * we get the post-operation mtime and size.
2798 * Both of these changes to the XDR layer would in fact be quite
2799 * minor, but I decided to leave them for a subsequent patch.
2801 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2802 unsigned int pgbase, unsigned int pglen)
2804 struct nfs4_readlink args = {
2805 .fh = NFS_FH(inode),
2810 struct nfs4_readlink_res res;
2811 struct rpc_message msg = {
2812 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2817 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2820 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2821 unsigned int pgbase, unsigned int pglen)
2823 struct nfs4_exception exception = { };
2826 err = nfs4_handle_exception(NFS_SERVER(inode),
2827 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2829 } while (exception.retry);
2834 * This is just for mknod. open(O_CREAT) will always do ->open_context().
2837 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2840 struct nfs_open_context *ctx;
2841 struct nfs4_state *state;
2844 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2846 return PTR_ERR(ctx);
2848 sattr->ia_mode &= ~current_umask();
2849 state = nfs4_do_open(dir, dentry, ctx->mode,
2850 flags, sattr, ctx->cred,
2851 &ctx->mdsthreshold);
2853 if (IS_ERR(state)) {
2854 status = PTR_ERR(state);
2857 d_add(dentry, igrab(state->inode));
2858 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2861 put_nfs_open_context(ctx);
2865 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2867 struct nfs_server *server = NFS_SERVER(dir);
2868 struct nfs_removeargs args = {
2872 struct nfs_removeres res = {
2875 struct rpc_message msg = {
2876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2882 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2884 update_changeattr(dir, &res.cinfo);
2888 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2890 struct nfs4_exception exception = { };
2893 err = nfs4_handle_exception(NFS_SERVER(dir),
2894 _nfs4_proc_remove(dir, name),
2896 } while (exception.retry);
2900 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2902 struct nfs_server *server = NFS_SERVER(dir);
2903 struct nfs_removeargs *args = msg->rpc_argp;
2904 struct nfs_removeres *res = msg->rpc_resp;
2906 res->server = server;
2907 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2908 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2911 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2913 nfs4_setup_sequence(NFS_SERVER(data->dir),
2914 &data->args.seq_args,
2919 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2921 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2923 if (!nfs4_sequence_done(task, &res->seq_res))
2925 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2927 update_changeattr(dir, &res->cinfo);
2931 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2933 struct nfs_server *server = NFS_SERVER(dir);
2934 struct nfs_renameargs *arg = msg->rpc_argp;
2935 struct nfs_renameres *res = msg->rpc_resp;
2937 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2938 res->server = server;
2939 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2942 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2944 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2945 &data->args.seq_args,
2950 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2951 struct inode *new_dir)
2953 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2955 if (!nfs4_sequence_done(task, &res->seq_res))
2957 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2960 update_changeattr(old_dir, &res->old_cinfo);
2961 update_changeattr(new_dir, &res->new_cinfo);
2965 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2966 struct inode *new_dir, struct qstr *new_name)
2968 struct nfs_server *server = NFS_SERVER(old_dir);
2969 struct nfs_renameargs arg = {
2970 .old_dir = NFS_FH(old_dir),
2971 .new_dir = NFS_FH(new_dir),
2972 .old_name = old_name,
2973 .new_name = new_name,
2975 struct nfs_renameres res = {
2978 struct rpc_message msg = {
2979 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2983 int status = -ENOMEM;
2985 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2987 update_changeattr(old_dir, &res.old_cinfo);
2988 update_changeattr(new_dir, &res.new_cinfo);
2993 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2994 struct inode *new_dir, struct qstr *new_name)
2996 struct nfs4_exception exception = { };
2999 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3000 _nfs4_proc_rename(old_dir, old_name,
3003 } while (exception.retry);
3007 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3009 struct nfs_server *server = NFS_SERVER(inode);
3010 struct nfs4_link_arg arg = {
3011 .fh = NFS_FH(inode),
3012 .dir_fh = NFS_FH(dir),
3014 .bitmask = server->attr_bitmask,
3016 struct nfs4_link_res res = {
3019 struct rpc_message msg = {
3020 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3024 int status = -ENOMEM;
3026 res.fattr = nfs_alloc_fattr();
3027 if (res.fattr == NULL)
3030 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3032 update_changeattr(dir, &res.cinfo);
3033 nfs_post_op_update_inode(inode, res.fattr);
3036 nfs_free_fattr(res.fattr);
3040 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3042 struct nfs4_exception exception = { };
3045 err = nfs4_handle_exception(NFS_SERVER(inode),
3046 _nfs4_proc_link(inode, dir, name),
3048 } while (exception.retry);
3052 struct nfs4_createdata {
3053 struct rpc_message msg;
3054 struct nfs4_create_arg arg;
3055 struct nfs4_create_res res;
3057 struct nfs_fattr fattr;
3060 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3061 struct qstr *name, struct iattr *sattr, u32 ftype)
3063 struct nfs4_createdata *data;
3065 data = kzalloc(sizeof(*data), GFP_KERNEL);
3067 struct nfs_server *server = NFS_SERVER(dir);
3069 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3070 data->msg.rpc_argp = &data->arg;
3071 data->msg.rpc_resp = &data->res;
3072 data->arg.dir_fh = NFS_FH(dir);
3073 data->arg.server = server;
3074 data->arg.name = name;
3075 data->arg.attrs = sattr;
3076 data->arg.ftype = ftype;
3077 data->arg.bitmask = server->attr_bitmask;
3078 data->res.server = server;
3079 data->res.fh = &data->fh;
3080 data->res.fattr = &data->fattr;
3081 nfs_fattr_init(data->res.fattr);
3086 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3088 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3089 &data->arg.seq_args, &data->res.seq_res, 1);
3091 update_changeattr(dir, &data->res.dir_cinfo);
3092 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3097 static void nfs4_free_createdata(struct nfs4_createdata *data)
3102 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3103 struct page *page, unsigned int len, struct iattr *sattr)
3105 struct nfs4_createdata *data;
3106 int status = -ENAMETOOLONG;
3108 if (len > NFS4_MAXPATHLEN)
3112 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3116 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3117 data->arg.u.symlink.pages = &page;
3118 data->arg.u.symlink.len = len;
3120 status = nfs4_do_create(dir, dentry, data);
3122 nfs4_free_createdata(data);
3127 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3128 struct page *page, unsigned int len, struct iattr *sattr)
3130 struct nfs4_exception exception = { };
3133 err = nfs4_handle_exception(NFS_SERVER(dir),
3134 _nfs4_proc_symlink(dir, dentry, page,
3137 } while (exception.retry);
3141 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3142 struct iattr *sattr)
3144 struct nfs4_createdata *data;
3145 int status = -ENOMEM;
3147 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3151 status = nfs4_do_create(dir, dentry, data);
3153 nfs4_free_createdata(data);
3158 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3159 struct iattr *sattr)
3161 struct nfs4_exception exception = { };
3164 sattr->ia_mode &= ~current_umask();
3166 err = nfs4_handle_exception(NFS_SERVER(dir),
3167 _nfs4_proc_mkdir(dir, dentry, sattr),
3169 } while (exception.retry);
3173 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3174 u64 cookie, struct page **pages, unsigned int count, int plus)
3176 struct inode *dir = dentry->d_inode;
3177 struct nfs4_readdir_arg args = {
3182 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3185 struct nfs4_readdir_res res;
3186 struct rpc_message msg = {
3187 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3194 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3195 dentry->d_parent->d_name.name,
3196 dentry->d_name.name,
3197 (unsigned long long)cookie);
3198 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3199 res.pgbase = args.pgbase;
3200 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3202 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3203 status += args.pgbase;
3206 nfs_invalidate_atime(dir);
3208 dprintk("%s: returns %d\n", __func__, status);
3212 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3213 u64 cookie, struct page **pages, unsigned int count, int plus)
3215 struct nfs4_exception exception = { };
3218 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3219 _nfs4_proc_readdir(dentry, cred, cookie,
3220 pages, count, plus),
3222 } while (exception.retry);
3226 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3227 struct iattr *sattr, dev_t rdev)
3229 struct nfs4_createdata *data;
3230 int mode = sattr->ia_mode;
3231 int status = -ENOMEM;
3233 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3238 data->arg.ftype = NF4FIFO;
3239 else if (S_ISBLK(mode)) {
3240 data->arg.ftype = NF4BLK;
3241 data->arg.u.device.specdata1 = MAJOR(rdev);
3242 data->arg.u.device.specdata2 = MINOR(rdev);
3244 else if (S_ISCHR(mode)) {
3245 data->arg.ftype = NF4CHR;
3246 data->arg.u.device.specdata1 = MAJOR(rdev);
3247 data->arg.u.device.specdata2 = MINOR(rdev);
3248 } else if (!S_ISSOCK(mode)) {
3253 status = nfs4_do_create(dir, dentry, data);
3255 nfs4_free_createdata(data);
3260 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3261 struct iattr *sattr, dev_t rdev)
3263 struct nfs4_exception exception = { };
3266 sattr->ia_mode &= ~current_umask();
3268 err = nfs4_handle_exception(NFS_SERVER(dir),
3269 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3271 } while (exception.retry);
3275 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3276 struct nfs_fsstat *fsstat)
3278 struct nfs4_statfs_arg args = {
3280 .bitmask = server->attr_bitmask,
3282 struct nfs4_statfs_res res = {
3285 struct rpc_message msg = {
3286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3291 nfs_fattr_init(fsstat->fattr);
3292 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3295 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3297 struct nfs4_exception exception = { };
3300 err = nfs4_handle_exception(server,
3301 _nfs4_proc_statfs(server, fhandle, fsstat),
3303 } while (exception.retry);
3307 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3308 struct nfs_fsinfo *fsinfo)
3310 struct nfs4_fsinfo_arg args = {
3312 .bitmask = server->attr_bitmask,
3314 struct nfs4_fsinfo_res res = {
3317 struct rpc_message msg = {
3318 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3323 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3326 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3328 struct nfs4_exception exception = { };
3332 err = nfs4_handle_exception(server,
3333 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3335 } while (exception.retry);
3339 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3343 nfs_fattr_init(fsinfo->fattr);
3344 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3346 /* block layout checks this! */
3347 server->pnfs_blksize = fsinfo->blksize;
3348 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3354 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3355 struct nfs_pathconf *pathconf)
3357 struct nfs4_pathconf_arg args = {
3359 .bitmask = server->attr_bitmask,
3361 struct nfs4_pathconf_res res = {
3362 .pathconf = pathconf,
3364 struct rpc_message msg = {
3365 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3370 /* None of the pathconf attributes are mandatory to implement */
3371 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3372 memset(pathconf, 0, sizeof(*pathconf));
3376 nfs_fattr_init(pathconf->fattr);
3377 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3380 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3381 struct nfs_pathconf *pathconf)
3383 struct nfs4_exception exception = { };
3387 err = nfs4_handle_exception(server,
3388 _nfs4_proc_pathconf(server, fhandle, pathconf),
3390 } while (exception.retry);
3394 void __nfs4_read_done_cb(struct nfs_read_data *data)
3396 nfs_invalidate_atime(data->header->inode);
3399 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3401 struct nfs_server *server = NFS_SERVER(data->header->inode);
3403 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3404 rpc_restart_call_prepare(task);
3408 __nfs4_read_done_cb(data);
3409 if (task->tk_status > 0)
3410 renew_lease(server, data->timestamp);
3414 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3417 dprintk("--> %s\n", __func__);
3419 if (!nfs4_sequence_done(task, &data->res.seq_res))
3422 return data->read_done_cb ? data->read_done_cb(task, data) :
3423 nfs4_read_done_cb(task, data);
3426 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3428 data->timestamp = jiffies;
3429 data->read_done_cb = nfs4_read_done_cb;
3430 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3431 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3434 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3436 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3437 &data->args.seq_args,
3442 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3444 struct inode *inode = data->header->inode;
3446 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3447 rpc_restart_call_prepare(task);
3450 if (task->tk_status >= 0) {
3451 renew_lease(NFS_SERVER(inode), data->timestamp);
3452 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3457 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3459 if (!nfs4_sequence_done(task, &data->res.seq_res))
3461 return data->write_done_cb ? data->write_done_cb(task, data) :
3462 nfs4_write_done_cb(task, data);
3466 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3468 const struct nfs_pgio_header *hdr = data->header;
3470 /* Don't request attributes for pNFS or O_DIRECT writes */
3471 if (data->ds_clp != NULL || hdr->dreq != NULL)
3473 /* Otherwise, request attributes if and only if we don't hold
3476 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3479 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3481 struct nfs_server *server = NFS_SERVER(data->header->inode);
3483 if (!nfs4_write_need_cache_consistency_data(data)) {
3484 data->args.bitmask = NULL;
3485 data->res.fattr = NULL;
3487 data->args.bitmask = server->cache_consistency_bitmask;
3489 if (!data->write_done_cb)
3490 data->write_done_cb = nfs4_write_done_cb;
3491 data->res.server = server;
3492 data->timestamp = jiffies;
3494 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3495 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3498 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3500 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3501 &data->args.seq_args,
3506 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3508 nfs4_setup_sequence(NFS_SERVER(data->inode),
3509 &data->args.seq_args,
3514 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3516 struct inode *inode = data->inode;
3518 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3519 rpc_restart_call_prepare(task);
3525 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3527 if (!nfs4_sequence_done(task, &data->res.seq_res))
3529 return data->commit_done_cb(task, data);
3532 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3534 struct nfs_server *server = NFS_SERVER(data->inode);
3536 if (data->commit_done_cb == NULL)
3537 data->commit_done_cb = nfs4_commit_done_cb;
3538 data->res.server = server;
3539 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3540 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3543 struct nfs4_renewdata {
3544 struct nfs_client *client;
3545 unsigned long timestamp;
3549 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3550 * standalone procedure for queueing an asynchronous RENEW.
3552 static void nfs4_renew_release(void *calldata)
3554 struct nfs4_renewdata *data = calldata;
3555 struct nfs_client *clp = data->client;
3557 if (atomic_read(&clp->cl_count) > 1)
3558 nfs4_schedule_state_renewal(clp);
3559 nfs_put_client(clp);
3563 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3565 struct nfs4_renewdata *data = calldata;
3566 struct nfs_client *clp = data->client;
3567 unsigned long timestamp = data->timestamp;
3569 if (task->tk_status < 0) {
3570 /* Unless we're shutting down, schedule state recovery! */
3571 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3573 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3574 nfs4_schedule_lease_recovery(clp);
3577 nfs4_schedule_path_down_recovery(clp);
3579 do_renew_lease(clp, timestamp);
3582 static const struct rpc_call_ops nfs4_renew_ops = {
3583 .rpc_call_done = nfs4_renew_done,
3584 .rpc_release = nfs4_renew_release,
3587 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3589 struct rpc_message msg = {
3590 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3594 struct nfs4_renewdata *data;
3596 if (renew_flags == 0)
3598 if (!atomic_inc_not_zero(&clp->cl_count))
3600 data = kmalloc(sizeof(*data), GFP_NOFS);
3604 data->timestamp = jiffies;
3605 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3606 &nfs4_renew_ops, data);
3609 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3611 struct rpc_message msg = {
3612 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3616 unsigned long now = jiffies;
3619 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3622 do_renew_lease(clp, now);
3626 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3628 return (server->caps & NFS_CAP_ACLS)
3629 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3630 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3633 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3634 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3637 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3639 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3640 struct page **pages, unsigned int *pgbase)
3642 struct page *newpage, **spages;
3648 len = min_t(size_t, PAGE_SIZE, buflen);
3649 newpage = alloc_page(GFP_KERNEL);
3651 if (newpage == NULL)
3653 memcpy(page_address(newpage), buf, len);
3658 } while (buflen != 0);
3664 __free_page(spages[rc-1]);
3668 struct nfs4_cached_acl {
3674 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3676 struct nfs_inode *nfsi = NFS_I(inode);
3678 spin_lock(&inode->i_lock);
3679 kfree(nfsi->nfs4_acl);
3680 nfsi->nfs4_acl = acl;
3681 spin_unlock(&inode->i_lock);
3684 static void nfs4_zap_acl_attr(struct inode *inode)
3686 nfs4_set_cached_acl(inode, NULL);
3689 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3691 struct nfs_inode *nfsi = NFS_I(inode);
3692 struct nfs4_cached_acl *acl;
3695 spin_lock(&inode->i_lock);
3696 acl = nfsi->nfs4_acl;
3699 if (buf == NULL) /* user is just asking for length */
3701 if (acl->cached == 0)
3703 ret = -ERANGE; /* see getxattr(2) man page */
3704 if (acl->len > buflen)
3706 memcpy(buf, acl->data, acl->len);
3710 spin_unlock(&inode->i_lock);
3714 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3716 struct nfs4_cached_acl *acl;
3717 size_t buflen = sizeof(*acl) + acl_len;
3719 if (buflen <= PAGE_SIZE) {
3720 acl = kmalloc(buflen, GFP_KERNEL);
3724 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3726 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3733 nfs4_set_cached_acl(inode, acl);
3737 * The getxattr API returns the required buffer length when called with a
3738 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3739 * the required buf. On a NULL buf, we send a page of data to the server
3740 * guessing that the ACL request can be serviced by a page. If so, we cache
3741 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3742 * the cache. If not so, we throw away the page, and cache the required
3743 * length. The next getxattr call will then produce another round trip to
3744 * the server, this time with the input buf of the required size.
3746 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3748 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3749 struct nfs_getaclargs args = {
3750 .fh = NFS_FH(inode),
3754 struct nfs_getaclres res = {
3757 struct rpc_message msg = {
3758 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3762 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3763 int ret = -ENOMEM, i;
3765 /* As long as we're doing a round trip to the server anyway,
3766 * let's be prepared for a page of acl data. */
3769 if (npages > ARRAY_SIZE(pages))
3772 for (i = 0; i < npages; i++) {
3773 pages[i] = alloc_page(GFP_KERNEL);
3778 /* for decoding across pages */
3779 res.acl_scratch = alloc_page(GFP_KERNEL);
3780 if (!res.acl_scratch)
3783 args.acl_len = npages * PAGE_SIZE;
3784 args.acl_pgbase = 0;
3786 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3787 __func__, buf, buflen, npages, args.acl_len);
3788 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3789 &msg, &args.seq_args, &res.seq_res, 0);
3793 /* Handle the case where the passed-in buffer is too short */
3794 if (res.acl_flags & NFS4_ACL_TRUNC) {
3795 /* Did the user only issue a request for the acl length? */
3801 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3803 if (res.acl_len > buflen) {
3807 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3812 for (i = 0; i < npages; i++)
3814 __free_page(pages[i]);
3815 if (res.acl_scratch)
3816 __free_page(res.acl_scratch);
3820 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3822 struct nfs4_exception exception = { };
3825 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3828 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3829 } while (exception.retry);
3833 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3835 struct nfs_server *server = NFS_SERVER(inode);
3838 if (!nfs4_server_supports_acls(server))
3840 ret = nfs_revalidate_inode(server, inode);
3843 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3844 nfs_zap_acl_cache(inode);
3845 ret = nfs4_read_cached_acl(inode, buf, buflen);
3847 /* -ENOENT is returned if there is no ACL or if there is an ACL
3848 * but no cached acl data, just the acl length */
3850 return nfs4_get_acl_uncached(inode, buf, buflen);
3853 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3855 struct nfs_server *server = NFS_SERVER(inode);
3856 struct page *pages[NFS4ACL_MAXPAGES];
3857 struct nfs_setaclargs arg = {
3858 .fh = NFS_FH(inode),
3862 struct nfs_setaclres res;
3863 struct rpc_message msg = {
3864 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3868 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3871 if (!nfs4_server_supports_acls(server))
3873 if (npages > ARRAY_SIZE(pages))
3875 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3878 nfs4_inode_return_delegation(inode);
3879 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3882 * Free each page after tx, so the only ref left is
3883 * held by the network stack
3886 put_page(pages[i-1]);
3889 * Acl update can result in inode attribute update.
3890 * so mark the attribute cache invalid.
3892 spin_lock(&inode->i_lock);
3893 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3894 spin_unlock(&inode->i_lock);
3895 nfs_access_zap_cache(inode);
3896 nfs_zap_acl_cache(inode);
3900 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3902 struct nfs4_exception exception = { };
3905 err = nfs4_handle_exception(NFS_SERVER(inode),
3906 __nfs4_proc_set_acl(inode, buf, buflen),
3908 } while (exception.retry);
3913 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3915 struct nfs_client *clp = server->nfs_client;
3917 if (task->tk_status >= 0)
3919 switch(task->tk_status) {
3920 case -NFS4ERR_DELEG_REVOKED:
3921 case -NFS4ERR_ADMIN_REVOKED:
3922 case -NFS4ERR_BAD_STATEID:
3925 nfs_remove_bad_delegation(state->inode);
3926 case -NFS4ERR_OPENMODE:
3929 nfs4_schedule_stateid_recovery(server, state);
3930 goto wait_on_recovery;
3931 case -NFS4ERR_EXPIRED:
3933 nfs4_schedule_stateid_recovery(server, state);
3934 case -NFS4ERR_STALE_STATEID:
3935 case -NFS4ERR_STALE_CLIENTID:
3936 nfs4_schedule_lease_recovery(clp);
3937 goto wait_on_recovery;
3938 #if defined(CONFIG_NFS_V4_1)
3939 case -NFS4ERR_BADSESSION:
3940 case -NFS4ERR_BADSLOT:
3941 case -NFS4ERR_BAD_HIGH_SLOT:
3942 case -NFS4ERR_DEADSESSION:
3943 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3944 case -NFS4ERR_SEQ_FALSE_RETRY:
3945 case -NFS4ERR_SEQ_MISORDERED:
3946 dprintk("%s ERROR %d, Reset session\n", __func__,
3948 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
3949 task->tk_status = 0;
3951 #endif /* CONFIG_NFS_V4_1 */
3952 case -NFS4ERR_DELAY:
3953 nfs_inc_server_stats(server, NFSIOS_DELAY);
3954 case -NFS4ERR_GRACE:
3955 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3956 task->tk_status = 0;
3958 case -NFS4ERR_RETRY_UNCACHED_REP:
3959 case -NFS4ERR_OLD_STATEID:
3960 task->tk_status = 0;
3963 task->tk_status = nfs4_map_errors(task->tk_status);
3966 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3967 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3968 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3969 task->tk_status = 0;
3973 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3974 nfs4_verifier *bootverf)
3978 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
3979 /* An impossible timestamp guarantees this value
3980 * will never match a generated boot time. */
3982 verf[1] = (__be32)(NSEC_PER_SEC + 1);
3984 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
3985 verf[0] = (__be32)nn->boot_time.tv_sec;
3986 verf[1] = (__be32)nn->boot_time.tv_nsec;
3988 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3992 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
3993 char *buf, size_t len)
3995 unsigned int result;
3998 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4000 rpc_peeraddr2str(clp->cl_rpcclient,
4002 rpc_peeraddr2str(clp->cl_rpcclient,
4003 RPC_DISPLAY_PROTO));
4009 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4010 char *buf, size_t len)
4012 char *nodename = clp->cl_rpcclient->cl_nodename;
4014 if (nfs4_client_id_uniquifier[0] != '\0')
4015 nodename = nfs4_client_id_uniquifier;
4016 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4017 clp->rpc_ops->version, clp->cl_minorversion,
4022 * nfs4_proc_setclientid - Negotiate client ID
4023 * @clp: state data structure
4024 * @program: RPC program for NFSv4 callback service
4025 * @port: IP port number for NFS4 callback service
4026 * @cred: RPC credential to use for this call
4027 * @res: where to place the result
4029 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4031 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4032 unsigned short port, struct rpc_cred *cred,
4033 struct nfs4_setclientid_res *res)
4035 nfs4_verifier sc_verifier;
4036 struct nfs4_setclientid setclientid = {
4037 .sc_verifier = &sc_verifier,
4039 .sc_cb_ident = clp->cl_cb_ident,
4041 struct rpc_message msg = {
4042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4043 .rpc_argp = &setclientid,
4049 /* nfs_client_id4 */
4050 nfs4_init_boot_verifier(clp, &sc_verifier);
4051 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4052 setclientid.sc_name_len =
4053 nfs4_init_uniform_client_string(clp,
4054 setclientid.sc_name,
4055 sizeof(setclientid.sc_name));
4057 setclientid.sc_name_len =
4058 nfs4_init_nonuniform_client_string(clp,
4059 setclientid.sc_name,
4060 sizeof(setclientid.sc_name));
4063 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4064 sizeof(setclientid.sc_netid),
4065 rpc_peeraddr2str(clp->cl_rpcclient,
4066 RPC_DISPLAY_NETID));
4068 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4069 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4070 clp->cl_ipaddr, port >> 8, port & 255);
4072 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4073 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4074 setclientid.sc_name_len, setclientid.sc_name);
4075 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4076 dprintk("NFS reply setclientid: %d\n", status);
4081 * nfs4_proc_setclientid_confirm - Confirm client ID
4082 * @clp: state data structure
4083 * @res: result of a previous SETCLIENTID
4084 * @cred: RPC credential to use for this call
4086 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4088 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4089 struct nfs4_setclientid_res *arg,
4090 struct rpc_cred *cred)
4092 struct nfs_fsinfo fsinfo;
4093 struct rpc_message msg = {
4094 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4096 .rpc_resp = &fsinfo,
4102 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4103 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4106 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4108 spin_lock(&clp->cl_lock);
4109 clp->cl_lease_time = fsinfo.lease_time * HZ;
4110 clp->cl_last_renewal = now;
4111 spin_unlock(&clp->cl_lock);
4113 dprintk("NFS reply setclientid_confirm: %d\n", status);
4117 struct nfs4_delegreturndata {
4118 struct nfs4_delegreturnargs args;
4119 struct nfs4_delegreturnres res;
4121 nfs4_stateid stateid;
4122 unsigned long timestamp;
4123 struct nfs_fattr fattr;
4127 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4129 struct nfs4_delegreturndata *data = calldata;
4131 if (!nfs4_sequence_done(task, &data->res.seq_res))
4134 switch (task->tk_status) {
4135 case -NFS4ERR_STALE_STATEID:
4136 case -NFS4ERR_EXPIRED:
4138 renew_lease(data->res.server, data->timestamp);
4141 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4143 rpc_restart_call_prepare(task);
4147 data->rpc_status = task->tk_status;
4150 static void nfs4_delegreturn_release(void *calldata)
4155 #if defined(CONFIG_NFS_V4_1)
4156 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4158 struct nfs4_delegreturndata *d_data;
4160 d_data = (struct nfs4_delegreturndata *)data;
4162 nfs4_setup_sequence(d_data->res.server,
4163 &d_data->args.seq_args,
4164 &d_data->res.seq_res,
4167 #endif /* CONFIG_NFS_V4_1 */
4169 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4170 #if defined(CONFIG_NFS_V4_1)
4171 .rpc_call_prepare = nfs4_delegreturn_prepare,
4172 #endif /* CONFIG_NFS_V4_1 */
4173 .rpc_call_done = nfs4_delegreturn_done,
4174 .rpc_release = nfs4_delegreturn_release,
4177 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4179 struct nfs4_delegreturndata *data;
4180 struct nfs_server *server = NFS_SERVER(inode);
4181 struct rpc_task *task;
4182 struct rpc_message msg = {
4183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4186 struct rpc_task_setup task_setup_data = {
4187 .rpc_client = server->client,
4188 .rpc_message = &msg,
4189 .callback_ops = &nfs4_delegreturn_ops,
4190 .flags = RPC_TASK_ASYNC,
4194 data = kzalloc(sizeof(*data), GFP_NOFS);
4197 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4198 data->args.fhandle = &data->fh;
4199 data->args.stateid = &data->stateid;
4200 data->args.bitmask = server->cache_consistency_bitmask;
4201 nfs_copy_fh(&data->fh, NFS_FH(inode));
4202 nfs4_stateid_copy(&data->stateid, stateid);
4203 data->res.fattr = &data->fattr;
4204 data->res.server = server;
4205 nfs_fattr_init(data->res.fattr);
4206 data->timestamp = jiffies;
4207 data->rpc_status = 0;
4209 task_setup_data.callback_data = data;
4210 msg.rpc_argp = &data->args;
4211 msg.rpc_resp = &data->res;
4212 task = rpc_run_task(&task_setup_data);
4214 return PTR_ERR(task);
4217 status = nfs4_wait_for_completion_rpc_task(task);
4220 status = data->rpc_status;
4222 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4224 nfs_refresh_inode(inode, &data->fattr);
4230 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4232 struct nfs_server *server = NFS_SERVER(inode);
4233 struct nfs4_exception exception = { };
4236 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4238 case -NFS4ERR_STALE_STATEID:
4239 case -NFS4ERR_EXPIRED:
4243 err = nfs4_handle_exception(server, err, &exception);
4244 } while (exception.retry);
4248 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4249 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4252 * sleep, with exponential backoff, and retry the LOCK operation.
4254 static unsigned long
4255 nfs4_set_lock_task_retry(unsigned long timeout)
4257 freezable_schedule_timeout_killable(timeout);
4259 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4260 return NFS4_LOCK_MAXTIMEOUT;
4264 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4266 struct inode *inode = state->inode;
4267 struct nfs_server *server = NFS_SERVER(inode);
4268 struct nfs_client *clp = server->nfs_client;
4269 struct nfs_lockt_args arg = {
4270 .fh = NFS_FH(inode),
4273 struct nfs_lockt_res res = {
4276 struct rpc_message msg = {
4277 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4280 .rpc_cred = state->owner->so_cred,
4282 struct nfs4_lock_state *lsp;
4285 arg.lock_owner.clientid = clp->cl_clientid;
4286 status = nfs4_set_lock_state(state, request);
4289 lsp = request->fl_u.nfs4_fl.owner;
4290 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4291 arg.lock_owner.s_dev = server->s_dev;
4292 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4295 request->fl_type = F_UNLCK;
4297 case -NFS4ERR_DENIED:
4300 request->fl_ops->fl_release_private(request);
4305 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4307 struct nfs4_exception exception = { };
4311 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4312 _nfs4_proc_getlk(state, cmd, request),
4314 } while (exception.retry);
4318 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4321 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4323 res = posix_lock_file_wait(file, fl);
4326 res = flock_lock_file_wait(file, fl);
4334 struct nfs4_unlockdata {
4335 struct nfs_locku_args arg;
4336 struct nfs_locku_res res;
4337 struct nfs4_lock_state *lsp;
4338 struct nfs_open_context *ctx;
4339 struct file_lock fl;
4340 const struct nfs_server *server;
4341 unsigned long timestamp;
4344 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4345 struct nfs_open_context *ctx,
4346 struct nfs4_lock_state *lsp,
4347 struct nfs_seqid *seqid)
4349 struct nfs4_unlockdata *p;
4350 struct inode *inode = lsp->ls_state->inode;
4352 p = kzalloc(sizeof(*p), GFP_NOFS);
4355 p->arg.fh = NFS_FH(inode);
4357 p->arg.seqid = seqid;
4358 p->res.seqid = seqid;
4359 p->arg.stateid = &lsp->ls_stateid;
4361 atomic_inc(&lsp->ls_count);
4362 /* Ensure we don't close file until we're done freeing locks! */
4363 p->ctx = get_nfs_open_context(ctx);
4364 memcpy(&p->fl, fl, sizeof(p->fl));
4365 p->server = NFS_SERVER(inode);
4369 static void nfs4_locku_release_calldata(void *data)
4371 struct nfs4_unlockdata *calldata = data;
4372 nfs_free_seqid(calldata->arg.seqid);
4373 nfs4_put_lock_state(calldata->lsp);
4374 put_nfs_open_context(calldata->ctx);
4378 static void nfs4_locku_done(struct rpc_task *task, void *data)
4380 struct nfs4_unlockdata *calldata = data;
4382 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4384 switch (task->tk_status) {
4386 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4387 &calldata->res.stateid);
4388 renew_lease(calldata->server, calldata->timestamp);
4390 case -NFS4ERR_BAD_STATEID:
4391 case -NFS4ERR_OLD_STATEID:
4392 case -NFS4ERR_STALE_STATEID:
4393 case -NFS4ERR_EXPIRED:
4396 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4397 rpc_restart_call_prepare(task);
4399 nfs_release_seqid(calldata->arg.seqid);
4402 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4404 struct nfs4_unlockdata *calldata = data;
4406 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4408 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
4409 /* Note: exit _without_ running nfs4_locku_done */
4410 task->tk_action = NULL;
4411 nfs4_sequence_done(task, &calldata->res.seq_res);
4414 calldata->timestamp = jiffies;
4415 if (nfs4_setup_sequence(calldata->server,
4416 &calldata->arg.seq_args,
4417 &calldata->res.seq_res,
4419 nfs_release_seqid(calldata->arg.seqid);
4422 static const struct rpc_call_ops nfs4_locku_ops = {
4423 .rpc_call_prepare = nfs4_locku_prepare,
4424 .rpc_call_done = nfs4_locku_done,
4425 .rpc_release = nfs4_locku_release_calldata,
4428 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4429 struct nfs_open_context *ctx,
4430 struct nfs4_lock_state *lsp,
4431 struct nfs_seqid *seqid)
4433 struct nfs4_unlockdata *data;
4434 struct rpc_message msg = {
4435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4436 .rpc_cred = ctx->cred,
4438 struct rpc_task_setup task_setup_data = {
4439 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4440 .rpc_message = &msg,
4441 .callback_ops = &nfs4_locku_ops,
4442 .workqueue = nfsiod_workqueue,
4443 .flags = RPC_TASK_ASYNC,
4446 /* Ensure this is an unlock - when canceling a lock, the
4447 * canceled lock is passed in, and it won't be an unlock.
4449 fl->fl_type = F_UNLCK;
4451 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4453 nfs_free_seqid(seqid);
4454 return ERR_PTR(-ENOMEM);
4457 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4458 msg.rpc_argp = &data->arg;
4459 msg.rpc_resp = &data->res;
4460 task_setup_data.callback_data = data;
4461 return rpc_run_task(&task_setup_data);
4464 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4466 struct nfs_inode *nfsi = NFS_I(state->inode);
4467 struct nfs_seqid *seqid;
4468 struct nfs4_lock_state *lsp;
4469 struct rpc_task *task;
4471 unsigned char fl_flags = request->fl_flags;
4473 status = nfs4_set_lock_state(state, request);
4474 /* Unlock _before_ we do the RPC call */
4475 request->fl_flags |= FL_EXISTS;
4476 down_read(&nfsi->rwsem);
4477 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4478 up_read(&nfsi->rwsem);
4481 up_read(&nfsi->rwsem);
4484 /* Is this a delegated lock? */
4485 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4487 lsp = request->fl_u.nfs4_fl.owner;
4488 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4492 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4493 status = PTR_ERR(task);
4496 status = nfs4_wait_for_completion_rpc_task(task);
4499 request->fl_flags = fl_flags;
4503 struct nfs4_lockdata {
4504 struct nfs_lock_args arg;
4505 struct nfs_lock_res res;
4506 struct nfs4_lock_state *lsp;
4507 struct nfs_open_context *ctx;
4508 struct file_lock fl;
4509 unsigned long timestamp;
4512 struct nfs_server *server;
4515 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4516 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4519 struct nfs4_lockdata *p;
4520 struct inode *inode = lsp->ls_state->inode;
4521 struct nfs_server *server = NFS_SERVER(inode);
4523 p = kzalloc(sizeof(*p), gfp_mask);
4527 p->arg.fh = NFS_FH(inode);
4529 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4530 if (p->arg.open_seqid == NULL)
4532 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4533 if (p->arg.lock_seqid == NULL)
4534 goto out_free_seqid;
4535 p->arg.lock_stateid = &lsp->ls_stateid;
4536 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4537 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4538 p->arg.lock_owner.s_dev = server->s_dev;
4539 p->res.lock_seqid = p->arg.lock_seqid;
4542 atomic_inc(&lsp->ls_count);
4543 p->ctx = get_nfs_open_context(ctx);
4544 memcpy(&p->fl, fl, sizeof(p->fl));
4547 nfs_free_seqid(p->arg.open_seqid);
4553 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4555 struct nfs4_lockdata *data = calldata;
4556 struct nfs4_state *state = data->lsp->ls_state;
4558 dprintk("%s: begin!\n", __func__);
4559 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4561 /* Do we need to do an open_to_lock_owner? */
4562 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4563 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
4564 goto out_release_lock_seqid;
4566 data->arg.open_stateid = &state->stateid;
4567 data->arg.new_lock_owner = 1;
4568 data->res.open_seqid = data->arg.open_seqid;
4570 data->arg.new_lock_owner = 0;
4571 data->timestamp = jiffies;
4572 if (nfs4_setup_sequence(data->server,
4573 &data->arg.seq_args,
4577 nfs_release_seqid(data->arg.open_seqid);
4578 out_release_lock_seqid:
4579 nfs_release_seqid(data->arg.lock_seqid);
4580 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4583 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4585 struct nfs4_lockdata *data = calldata;
4587 dprintk("%s: begin!\n", __func__);
4589 if (!nfs4_sequence_done(task, &data->res.seq_res))
4592 data->rpc_status = task->tk_status;
4593 if (data->arg.new_lock_owner != 0) {
4594 if (data->rpc_status == 0)
4595 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4599 if (data->rpc_status == 0) {
4600 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4601 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
4602 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4605 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4608 static void nfs4_lock_release(void *calldata)
4610 struct nfs4_lockdata *data = calldata;
4612 dprintk("%s: begin!\n", __func__);
4613 nfs_free_seqid(data->arg.open_seqid);
4614 if (data->cancelled != 0) {
4615 struct rpc_task *task;
4616 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4617 data->arg.lock_seqid);
4619 rpc_put_task_async(task);
4620 dprintk("%s: cancelling lock!\n", __func__);
4622 nfs_free_seqid(data->arg.lock_seqid);
4623 nfs4_put_lock_state(data->lsp);
4624 put_nfs_open_context(data->ctx);
4626 dprintk("%s: done!\n", __func__);
4629 static const struct rpc_call_ops nfs4_lock_ops = {
4630 .rpc_call_prepare = nfs4_lock_prepare,
4631 .rpc_call_done = nfs4_lock_done,
4632 .rpc_release = nfs4_lock_release,
4635 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4638 case -NFS4ERR_ADMIN_REVOKED:
4639 case -NFS4ERR_BAD_STATEID:
4640 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4641 if (new_lock_owner != 0 ||
4642 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
4643 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4645 case -NFS4ERR_STALE_STATEID:
4646 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4647 case -NFS4ERR_EXPIRED:
4648 nfs4_schedule_lease_recovery(server->nfs_client);
4652 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4654 struct nfs4_lockdata *data;
4655 struct rpc_task *task;
4656 struct rpc_message msg = {
4657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4658 .rpc_cred = state->owner->so_cred,
4660 struct rpc_task_setup task_setup_data = {
4661 .rpc_client = NFS_CLIENT(state->inode),
4662 .rpc_message = &msg,
4663 .callback_ops = &nfs4_lock_ops,
4664 .workqueue = nfsiod_workqueue,
4665 .flags = RPC_TASK_ASYNC,
4669 dprintk("%s: begin!\n", __func__);
4670 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4671 fl->fl_u.nfs4_fl.owner,
4672 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4676 data->arg.block = 1;
4677 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4678 msg.rpc_argp = &data->arg;
4679 msg.rpc_resp = &data->res;
4680 task_setup_data.callback_data = data;
4681 if (recovery_type > NFS_LOCK_NEW) {
4682 if (recovery_type == NFS_LOCK_RECLAIM)
4683 data->arg.reclaim = NFS_LOCK_RECLAIM;
4684 nfs4_set_sequence_privileged(&data->arg.seq_args);
4686 task = rpc_run_task(&task_setup_data);
4688 return PTR_ERR(task);
4689 ret = nfs4_wait_for_completion_rpc_task(task);
4691 ret = data->rpc_status;
4693 nfs4_handle_setlk_error(data->server, data->lsp,
4694 data->arg.new_lock_owner, ret);
4696 data->cancelled = 1;
4698 dprintk("%s: done, ret = %d!\n", __func__, ret);
4702 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4704 struct nfs_server *server = NFS_SERVER(state->inode);
4705 struct nfs4_exception exception = {
4706 .inode = state->inode,
4711 /* Cache the lock if possible... */
4712 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4714 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4715 if (err != -NFS4ERR_DELAY)
4717 nfs4_handle_exception(server, err, &exception);
4718 } while (exception.retry);
4722 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4724 struct nfs_server *server = NFS_SERVER(state->inode);
4725 struct nfs4_exception exception = {
4726 .inode = state->inode,
4730 err = nfs4_set_lock_state(state, request);
4734 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4736 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4740 case -NFS4ERR_GRACE:
4741 case -NFS4ERR_DELAY:
4742 nfs4_handle_exception(server, err, &exception);
4745 } while (exception.retry);
4750 #if defined(CONFIG_NFS_V4_1)
4752 * nfs41_check_expired_locks - possibly free a lock stateid
4754 * @state: NFSv4 state for an inode
4756 * Returns NFS_OK if recovery for this stateid is now finished.
4757 * Otherwise a negative NFS4ERR value is returned.
4759 static int nfs41_check_expired_locks(struct nfs4_state *state)
4761 int status, ret = -NFS4ERR_BAD_STATEID;
4762 struct nfs4_lock_state *lsp;
4763 struct nfs_server *server = NFS_SERVER(state->inode);
4765 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4766 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
4767 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4768 if (status != NFS_OK) {
4769 /* Free the stateid unless the server
4770 * informs us the stateid is unrecognized. */
4771 if (status != -NFS4ERR_BAD_STATEID)
4772 nfs41_free_stateid(server,
4774 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
4783 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4785 int status = NFS_OK;
4787 if (test_bit(LK_STATE_IN_USE, &state->flags))
4788 status = nfs41_check_expired_locks(state);
4789 if (status != NFS_OK)
4790 status = nfs4_lock_expired(state, request);
4795 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4797 struct nfs_inode *nfsi = NFS_I(state->inode);
4798 unsigned char fl_flags = request->fl_flags;
4799 int status = -ENOLCK;
4801 if ((fl_flags & FL_POSIX) &&
4802 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4804 /* Is this a delegated open? */
4805 status = nfs4_set_lock_state(state, request);
4808 request->fl_flags |= FL_ACCESS;
4809 status = do_vfs_lock(request->fl_file, request);
4812 down_read(&nfsi->rwsem);
4813 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4814 /* Yes: cache locks! */
4815 /* ...but avoid races with delegation recall... */
4816 request->fl_flags = fl_flags & ~FL_SLEEP;
4817 status = do_vfs_lock(request->fl_file, request);
4820 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4823 /* Note: we always want to sleep here! */
4824 request->fl_flags = fl_flags | FL_SLEEP;
4825 if (do_vfs_lock(request->fl_file, request) < 0)
4826 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4827 "manager!\n", __func__);
4829 up_read(&nfsi->rwsem);
4831 request->fl_flags = fl_flags;
4835 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4837 struct nfs4_exception exception = {
4839 .inode = state->inode,
4844 err = _nfs4_proc_setlk(state, cmd, request);
4845 if (err == -NFS4ERR_DENIED)
4847 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4849 } while (exception.retry);
4854 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4856 struct nfs_open_context *ctx;
4857 struct nfs4_state *state;
4858 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4861 /* verify open state */
4862 ctx = nfs_file_open_context(filp);
4865 if (request->fl_start < 0 || request->fl_end < 0)
4868 if (IS_GETLK(cmd)) {
4870 return nfs4_proc_getlk(state, F_GETLK, request);
4874 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4877 if (request->fl_type == F_UNLCK) {
4879 return nfs4_proc_unlck(state, cmd, request);
4886 * Don't rely on the VFS having checked the file open mode,
4887 * since it won't do this for flock() locks.
4889 switch (request->fl_type) {
4891 if (!(filp->f_mode & FMODE_READ))
4895 if (!(filp->f_mode & FMODE_WRITE))
4900 status = nfs4_proc_setlk(state, cmd, request);
4901 if ((status != -EAGAIN) || IS_SETLK(cmd))
4903 timeout = nfs4_set_lock_task_retry(timeout);
4904 status = -ERESTARTSYS;
4907 } while(status < 0);
4911 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4913 struct nfs_server *server = NFS_SERVER(state->inode);
4914 struct nfs4_exception exception = { };
4917 err = nfs4_set_lock_state(state, fl);
4921 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4924 printk(KERN_ERR "NFS: %s: unhandled error "
4925 "%d.\n", __func__, err);
4929 case -NFS4ERR_EXPIRED:
4930 nfs4_schedule_stateid_recovery(server, state);
4931 case -NFS4ERR_STALE_CLIENTID:
4932 case -NFS4ERR_STALE_STATEID:
4933 nfs4_schedule_lease_recovery(server->nfs_client);
4935 case -NFS4ERR_BADSESSION:
4936 case -NFS4ERR_BADSLOT:
4937 case -NFS4ERR_BAD_HIGH_SLOT:
4938 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4939 case -NFS4ERR_DEADSESSION:
4940 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
4944 * The show must go on: exit, but mark the
4945 * stateid as needing recovery.
4947 case -NFS4ERR_DELEG_REVOKED:
4948 case -NFS4ERR_ADMIN_REVOKED:
4949 case -NFS4ERR_BAD_STATEID:
4950 case -NFS4ERR_OPENMODE:
4951 nfs4_schedule_stateid_recovery(server, state);
4955 case -NFS4ERR_DENIED:
4956 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4959 case -NFS4ERR_DELAY:
4962 err = nfs4_handle_exception(server, err, &exception);
4963 } while (exception.retry);
4968 struct nfs_release_lockowner_data {
4969 struct nfs4_lock_state *lsp;
4970 struct nfs_server *server;
4971 struct nfs_release_lockowner_args args;
4974 static void nfs4_release_lockowner_release(void *calldata)
4976 struct nfs_release_lockowner_data *data = calldata;
4977 nfs4_free_lock_state(data->server, data->lsp);
4981 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
4982 .rpc_release = nfs4_release_lockowner_release,
4985 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
4987 struct nfs_server *server = lsp->ls_state->owner->so_server;
4988 struct nfs_release_lockowner_data *data;
4989 struct rpc_message msg = {
4990 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4993 if (server->nfs_client->cl_mvops->minor_version != 0)
4995 data = kmalloc(sizeof(*data), GFP_NOFS);
4999 data->server = server;
5000 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5001 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5002 data->args.lock_owner.s_dev = server->s_dev;
5003 msg.rpc_argp = &data->args;
5004 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5008 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5010 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5011 const void *buf, size_t buflen,
5012 int flags, int type)
5014 if (strcmp(key, "") != 0)
5017 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5020 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5021 void *buf, size_t buflen, int type)
5023 if (strcmp(key, "") != 0)
5026 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5029 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5030 size_t list_len, const char *name,
5031 size_t name_len, int type)
5033 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5035 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5038 if (list && len <= list_len)
5039 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5044 * nfs_fhget will use either the mounted_on_fileid or the fileid
5046 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5048 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5049 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5050 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5051 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5054 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5055 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5056 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5060 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5061 const struct qstr *name,
5062 struct nfs4_fs_locations *fs_locations,
5065 struct nfs_server *server = NFS_SERVER(dir);
5067 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5069 struct nfs4_fs_locations_arg args = {
5070 .dir_fh = NFS_FH(dir),
5075 struct nfs4_fs_locations_res res = {
5076 .fs_locations = fs_locations,
5078 struct rpc_message msg = {
5079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5085 dprintk("%s: start\n", __func__);
5087 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5088 * is not supported */
5089 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5090 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5092 bitmask[0] |= FATTR4_WORD0_FILEID;
5094 nfs_fattr_init(&fs_locations->fattr);
5095 fs_locations->server = server;
5096 fs_locations->nlocations = 0;
5097 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5098 dprintk("%s: returned status = %d\n", __func__, status);
5102 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5103 const struct qstr *name,
5104 struct nfs4_fs_locations *fs_locations,
5107 struct nfs4_exception exception = { };
5110 err = nfs4_handle_exception(NFS_SERVER(dir),
5111 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5113 } while (exception.retry);
5117 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5120 struct nfs4_secinfo_arg args = {
5121 .dir_fh = NFS_FH(dir),
5124 struct nfs4_secinfo_res res = {
5127 struct rpc_message msg = {
5128 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5133 dprintk("NFS call secinfo %s\n", name->name);
5134 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5135 dprintk("NFS reply secinfo: %d\n", status);
5139 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5140 struct nfs4_secinfo_flavors *flavors)
5142 struct nfs4_exception exception = { };
5145 err = nfs4_handle_exception(NFS_SERVER(dir),
5146 _nfs4_proc_secinfo(dir, name, flavors),
5148 } while (exception.retry);
5152 #ifdef CONFIG_NFS_V4_1
5154 * Check the exchange flags returned by the server for invalid flags, having
5155 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5158 static int nfs4_check_cl_exchange_flags(u32 flags)
5160 if (flags & ~EXCHGID4_FLAG_MASK_R)
5162 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5163 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5165 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5169 return -NFS4ERR_INVAL;
5173 nfs41_same_server_scope(struct nfs41_server_scope *a,
5174 struct nfs41_server_scope *b)
5176 if (a->server_scope_sz == b->server_scope_sz &&
5177 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5184 * nfs4_proc_bind_conn_to_session()
5186 * The 4.1 client currently uses the same TCP connection for the
5187 * fore and backchannel.
5189 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5192 struct nfs41_bind_conn_to_session_res res;
5193 struct rpc_message msg = {
5195 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5201 dprintk("--> %s\n", __func__);
5203 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5204 if (unlikely(res.session == NULL)) {
5209 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5211 if (memcmp(res.session->sess_id.data,
5212 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5213 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5217 if (res.dir != NFS4_CDFS4_BOTH) {
5218 dprintk("NFS: %s: Unexpected direction from server\n",
5223 if (res.use_conn_in_rdma_mode) {
5224 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5233 dprintk("<-- %s status= %d\n", __func__, status);
5238 * nfs4_proc_exchange_id()
5240 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5242 * Since the clientid has expired, all compounds using sessions
5243 * associated with the stale clientid will be returning
5244 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5245 * be in some phase of session reset.
5247 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5249 nfs4_verifier verifier;
5250 struct nfs41_exchange_id_args args = {
5251 .verifier = &verifier,
5253 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5255 struct nfs41_exchange_id_res res = {
5259 struct rpc_message msg = {
5260 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5266 nfs4_init_boot_verifier(clp, &verifier);
5267 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5269 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5270 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5271 args.id_len, args.id);
5273 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5275 if (unlikely(res.server_owner == NULL)) {
5280 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5282 if (unlikely(res.server_scope == NULL)) {
5284 goto out_server_owner;
5287 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5288 if (unlikely(res.impl_id == NULL)) {
5290 goto out_server_scope;
5293 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5295 status = nfs4_check_cl_exchange_flags(res.flags);
5298 clp->cl_clientid = res.clientid;
5299 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5300 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5301 clp->cl_seqid = res.seqid;
5303 kfree(clp->cl_serverowner);
5304 clp->cl_serverowner = res.server_owner;
5305 res.server_owner = NULL;
5307 /* use the most recent implementation id */
5308 kfree(clp->cl_implid);
5309 clp->cl_implid = res.impl_id;
5311 if (clp->cl_serverscope != NULL &&
5312 !nfs41_same_server_scope(clp->cl_serverscope,
5313 res.server_scope)) {
5314 dprintk("%s: server_scope mismatch detected\n",
5316 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5317 kfree(clp->cl_serverscope);
5318 clp->cl_serverscope = NULL;
5321 if (clp->cl_serverscope == NULL) {
5322 clp->cl_serverscope = res.server_scope;
5329 kfree(res.server_owner);
5331 kfree(res.server_scope);
5333 if (clp->cl_implid != NULL)
5334 dprintk("NFS reply exchange_id: Server Implementation ID: "
5335 "domain: %s, name: %s, date: %llu,%u\n",
5336 clp->cl_implid->domain, clp->cl_implid->name,
5337 clp->cl_implid->date.seconds,
5338 clp->cl_implid->date.nseconds);
5339 dprintk("NFS reply exchange_id: %d\n", status);
5343 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5344 struct rpc_cred *cred)
5346 struct rpc_message msg = {
5347 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5353 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5355 dprintk("NFS: Got error %d from the server %s on "
5356 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5360 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5361 struct rpc_cred *cred)
5366 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5367 ret = _nfs4_proc_destroy_clientid(clp, cred);
5369 case -NFS4ERR_DELAY:
5370 case -NFS4ERR_CLIENTID_BUSY:
5380 int nfs4_destroy_clientid(struct nfs_client *clp)
5382 struct rpc_cred *cred;
5385 if (clp->cl_mvops->minor_version < 1)
5387 if (clp->cl_exchange_flags == 0)
5389 if (clp->cl_preserve_clid)
5391 cred = nfs4_get_exchange_id_cred(clp);
5392 ret = nfs4_proc_destroy_clientid(clp, cred);
5397 case -NFS4ERR_STALE_CLIENTID:
5398 clp->cl_exchange_flags = 0;
5404 struct nfs4_get_lease_time_data {
5405 struct nfs4_get_lease_time_args *args;
5406 struct nfs4_get_lease_time_res *res;
5407 struct nfs_client *clp;
5410 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5413 struct nfs4_get_lease_time_data *data =
5414 (struct nfs4_get_lease_time_data *)calldata;
5416 dprintk("--> %s\n", __func__);
5417 /* just setup sequence, do not trigger session recovery
5418 since we're invoked within one */
5419 nfs41_setup_sequence(data->clp->cl_session,
5420 &data->args->la_seq_args,
5421 &data->res->lr_seq_res,
5423 dprintk("<-- %s\n", __func__);
5427 * Called from nfs4_state_manager thread for session setup, so don't recover
5428 * from sequence operation or clientid errors.
5430 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5432 struct nfs4_get_lease_time_data *data =
5433 (struct nfs4_get_lease_time_data *)calldata;
5435 dprintk("--> %s\n", __func__);
5436 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5438 switch (task->tk_status) {
5439 case -NFS4ERR_DELAY:
5440 case -NFS4ERR_GRACE:
5441 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5442 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5443 task->tk_status = 0;
5445 case -NFS4ERR_RETRY_UNCACHED_REP:
5446 rpc_restart_call_prepare(task);
5449 dprintk("<-- %s\n", __func__);
5452 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5453 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5454 .rpc_call_done = nfs4_get_lease_time_done,
5457 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5459 struct rpc_task *task;
5460 struct nfs4_get_lease_time_args args;
5461 struct nfs4_get_lease_time_res res = {
5462 .lr_fsinfo = fsinfo,
5464 struct nfs4_get_lease_time_data data = {
5469 struct rpc_message msg = {
5470 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5474 struct rpc_task_setup task_setup = {
5475 .rpc_client = clp->cl_rpcclient,
5476 .rpc_message = &msg,
5477 .callback_ops = &nfs4_get_lease_time_ops,
5478 .callback_data = &data,
5479 .flags = RPC_TASK_TIMEOUT,
5483 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5484 nfs4_set_sequence_privileged(&args.la_seq_args);
5485 dprintk("--> %s\n", __func__);
5486 task = rpc_run_task(&task_setup);
5489 status = PTR_ERR(task);
5491 status = task->tk_status;
5494 dprintk("<-- %s return %d\n", __func__, status);
5500 * Initialize the values to be used by the client in CREATE_SESSION
5501 * If nfs4_init_session set the fore channel request and response sizes,
5504 * Set the back channel max_resp_sz_cached to zero to force the client to
5505 * always set csa_cachethis to FALSE because the current implementation
5506 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5508 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5510 struct nfs4_session *session = args->client->cl_session;
5511 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5512 mxresp_sz = session->fc_target_max_resp_sz;
5515 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5517 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5518 /* Fore channel attributes */
5519 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5520 args->fc_attrs.max_resp_sz = mxresp_sz;
5521 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5522 args->fc_attrs.max_reqs = max_session_slots;
5524 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5525 "max_ops=%u max_reqs=%u\n",
5527 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5528 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5530 /* Back channel attributes */
5531 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5532 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5533 args->bc_attrs.max_resp_sz_cached = 0;
5534 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5535 args->bc_attrs.max_reqs = 1;
5537 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5538 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5540 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5541 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5542 args->bc_attrs.max_reqs);
5545 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5547 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5548 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5550 if (rcvd->max_resp_sz > sent->max_resp_sz)
5553 * Our requested max_ops is the minimum we need; we're not
5554 * prepared to break up compounds into smaller pieces than that.
5555 * So, no point even trying to continue if the server won't
5558 if (rcvd->max_ops < sent->max_ops)
5560 if (rcvd->max_reqs == 0)
5562 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5563 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5567 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5569 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5570 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5572 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5574 if (rcvd->max_resp_sz < sent->max_resp_sz)
5576 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5578 /* These would render the backchannel useless: */
5579 if (rcvd->max_ops != sent->max_ops)
5581 if (rcvd->max_reqs != sent->max_reqs)
5586 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5587 struct nfs4_session *session)
5591 ret = nfs4_verify_fore_channel_attrs(args, session);
5594 return nfs4_verify_back_channel_attrs(args, session);
5597 static int _nfs4_proc_create_session(struct nfs_client *clp,
5598 struct rpc_cred *cred)
5600 struct nfs4_session *session = clp->cl_session;
5601 struct nfs41_create_session_args args = {
5603 .cb_program = NFS4_CALLBACK,
5605 struct nfs41_create_session_res res = {
5608 struct rpc_message msg = {
5609 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5616 nfs4_init_channel_attrs(&args);
5617 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5619 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5622 /* Verify the session's negotiated channel_attrs values */
5623 status = nfs4_verify_channel_attrs(&args, session);
5624 /* Increment the clientid slot sequence id */
5632 * Issues a CREATE_SESSION operation to the server.
5633 * It is the responsibility of the caller to verify the session is
5634 * expired before calling this routine.
5636 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5640 struct nfs4_session *session = clp->cl_session;
5642 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5644 status = _nfs4_proc_create_session(clp, cred);
5648 /* Init or reset the session slot tables */
5649 status = nfs4_setup_session_slot_tables(session);
5650 dprintk("slot table setup returned %d\n", status);
5654 ptr = (unsigned *)&session->sess_id.data[0];
5655 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5656 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5658 dprintk("<-- %s\n", __func__);
5663 * Issue the over-the-wire RPC DESTROY_SESSION.
5664 * The caller must serialize access to this routine.
5666 int nfs4_proc_destroy_session(struct nfs4_session *session,
5667 struct rpc_cred *cred)
5669 struct rpc_message msg = {
5670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5671 .rpc_argp = session,
5676 dprintk("--> nfs4_proc_destroy_session\n");
5678 /* session is still being setup */
5679 if (session->clp->cl_cons_state != NFS_CS_READY)
5682 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5685 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
5686 "Session has been destroyed regardless...\n", status);
5688 dprintk("<-- nfs4_proc_destroy_session\n");
5693 * Renew the cl_session lease.
5695 struct nfs4_sequence_data {
5696 struct nfs_client *clp;
5697 struct nfs4_sequence_args args;
5698 struct nfs4_sequence_res res;
5701 static void nfs41_sequence_release(void *data)
5703 struct nfs4_sequence_data *calldata = data;
5704 struct nfs_client *clp = calldata->clp;
5706 if (atomic_read(&clp->cl_count) > 1)
5707 nfs4_schedule_state_renewal(clp);
5708 nfs_put_client(clp);
5712 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5714 switch(task->tk_status) {
5715 case -NFS4ERR_DELAY:
5716 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5719 nfs4_schedule_lease_recovery(clp);
5724 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5726 struct nfs4_sequence_data *calldata = data;
5727 struct nfs_client *clp = calldata->clp;
5729 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5732 if (task->tk_status < 0) {
5733 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5734 if (atomic_read(&clp->cl_count) == 1)
5737 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5738 rpc_restart_call_prepare(task);
5742 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5744 dprintk("<-- %s\n", __func__);
5747 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5749 struct nfs4_sequence_data *calldata = data;
5750 struct nfs_client *clp = calldata->clp;
5751 struct nfs4_sequence_args *args;
5752 struct nfs4_sequence_res *res;
5754 args = task->tk_msg.rpc_argp;
5755 res = task->tk_msg.rpc_resp;
5757 nfs41_setup_sequence(clp->cl_session, args, res, task);
5760 static const struct rpc_call_ops nfs41_sequence_ops = {
5761 .rpc_call_done = nfs41_sequence_call_done,
5762 .rpc_call_prepare = nfs41_sequence_prepare,
5763 .rpc_release = nfs41_sequence_release,
5766 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5767 struct rpc_cred *cred,
5770 struct nfs4_sequence_data *calldata;
5771 struct rpc_message msg = {
5772 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5775 struct rpc_task_setup task_setup_data = {
5776 .rpc_client = clp->cl_rpcclient,
5777 .rpc_message = &msg,
5778 .callback_ops = &nfs41_sequence_ops,
5779 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5782 if (!atomic_inc_not_zero(&clp->cl_count))
5783 return ERR_PTR(-EIO);
5784 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5785 if (calldata == NULL) {
5786 nfs_put_client(clp);
5787 return ERR_PTR(-ENOMEM);
5789 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5791 nfs4_set_sequence_privileged(&calldata->args);
5792 msg.rpc_argp = &calldata->args;
5793 msg.rpc_resp = &calldata->res;
5794 calldata->clp = clp;
5795 task_setup_data.callback_data = calldata;
5797 return rpc_run_task(&task_setup_data);
5800 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5802 struct rpc_task *task;
5805 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5807 task = _nfs41_proc_sequence(clp, cred, false);
5809 ret = PTR_ERR(task);
5811 rpc_put_task_async(task);
5812 dprintk("<-- %s status=%d\n", __func__, ret);
5816 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5818 struct rpc_task *task;
5821 task = _nfs41_proc_sequence(clp, cred, true);
5823 ret = PTR_ERR(task);
5826 ret = rpc_wait_for_completion_task(task);
5828 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5830 if (task->tk_status == 0)
5831 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5832 ret = task->tk_status;
5836 dprintk("<-- %s status=%d\n", __func__, ret);
5840 struct nfs4_reclaim_complete_data {
5841 struct nfs_client *clp;
5842 struct nfs41_reclaim_complete_args arg;
5843 struct nfs41_reclaim_complete_res res;
5846 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5848 struct nfs4_reclaim_complete_data *calldata = data;
5850 nfs41_setup_sequence(calldata->clp->cl_session,
5851 &calldata->arg.seq_args,
5852 &calldata->res.seq_res,
5856 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5858 switch(task->tk_status) {
5860 case -NFS4ERR_COMPLETE_ALREADY:
5861 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5863 case -NFS4ERR_DELAY:
5864 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5866 case -NFS4ERR_RETRY_UNCACHED_REP:
5869 nfs4_schedule_lease_recovery(clp);
5874 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5876 struct nfs4_reclaim_complete_data *calldata = data;
5877 struct nfs_client *clp = calldata->clp;
5878 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5880 dprintk("--> %s\n", __func__);
5881 if (!nfs41_sequence_done(task, res))
5884 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5885 rpc_restart_call_prepare(task);
5888 dprintk("<-- %s\n", __func__);
5891 static void nfs4_free_reclaim_complete_data(void *data)
5893 struct nfs4_reclaim_complete_data *calldata = data;
5898 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5899 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5900 .rpc_call_done = nfs4_reclaim_complete_done,
5901 .rpc_release = nfs4_free_reclaim_complete_data,
5905 * Issue a global reclaim complete.
5907 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5909 struct nfs4_reclaim_complete_data *calldata;
5910 struct rpc_task *task;
5911 struct rpc_message msg = {
5912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5914 struct rpc_task_setup task_setup_data = {
5915 .rpc_client = clp->cl_rpcclient,
5916 .rpc_message = &msg,
5917 .callback_ops = &nfs4_reclaim_complete_call_ops,
5918 .flags = RPC_TASK_ASYNC,
5920 int status = -ENOMEM;
5922 dprintk("--> %s\n", __func__);
5923 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5924 if (calldata == NULL)
5926 calldata->clp = clp;
5927 calldata->arg.one_fs = 0;
5929 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
5930 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
5931 msg.rpc_argp = &calldata->arg;
5932 msg.rpc_resp = &calldata->res;
5933 task_setup_data.callback_data = calldata;
5934 task = rpc_run_task(&task_setup_data);
5936 status = PTR_ERR(task);
5939 status = nfs4_wait_for_completion_rpc_task(task);
5941 status = task->tk_status;
5945 dprintk("<-- %s status=%d\n", __func__, status);
5950 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5952 struct nfs4_layoutget *lgp = calldata;
5953 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5954 struct nfs4_session *session = nfs4_get_session(server);
5956 dprintk("--> %s\n", __func__);
5957 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5958 * right now covering the LAYOUTGET we are about to send.
5959 * However, that is not so catastrophic, and there seems
5960 * to be no way to prevent it completely.
5962 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
5963 &lgp->res.seq_res, task))
5965 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5966 NFS_I(lgp->args.inode)->layout,
5967 lgp->args.ctx->state)) {
5968 rpc_exit(task, NFS4_OK);
5972 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5974 struct nfs4_layoutget *lgp = calldata;
5975 struct inode *inode = lgp->args.inode;
5976 struct nfs_server *server = NFS_SERVER(inode);
5977 struct pnfs_layout_hdr *lo;
5978 struct nfs4_state *state = NULL;
5980 dprintk("--> %s\n", __func__);
5982 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
5985 switch (task->tk_status) {
5988 case -NFS4ERR_LAYOUTTRYLATER:
5989 case -NFS4ERR_RECALLCONFLICT:
5990 task->tk_status = -NFS4ERR_DELAY;
5992 case -NFS4ERR_EXPIRED:
5993 case -NFS4ERR_BAD_STATEID:
5994 spin_lock(&inode->i_lock);
5995 lo = NFS_I(inode)->layout;
5996 if (!lo || list_empty(&lo->plh_segs)) {
5997 spin_unlock(&inode->i_lock);
5998 /* If the open stateid was bad, then recover it. */
5999 state = lgp->args.ctx->state;
6003 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6004 spin_unlock(&inode->i_lock);
6005 /* Mark the bad layout state as invalid, then
6006 * retry using the open stateid. */
6007 pnfs_free_lseg_list(&head);
6010 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6011 rpc_restart_call_prepare(task);
6013 dprintk("<-- %s\n", __func__);
6016 static size_t max_response_pages(struct nfs_server *server)
6018 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6019 return nfs_page_array_len(0, max_resp_sz);
6022 static void nfs4_free_pages(struct page **pages, size_t size)
6029 for (i = 0; i < size; i++) {
6032 __free_page(pages[i]);
6037 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6039 struct page **pages;
6042 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6044 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6048 for (i = 0; i < size; i++) {
6049 pages[i] = alloc_page(gfp_flags);
6051 dprintk("%s: failed to allocate page\n", __func__);
6052 nfs4_free_pages(pages, size);
6060 static void nfs4_layoutget_release(void *calldata)
6062 struct nfs4_layoutget *lgp = calldata;
6063 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6064 size_t max_pages = max_response_pages(server);
6066 dprintk("--> %s\n", __func__);
6067 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6068 put_nfs_open_context(lgp->args.ctx);
6070 dprintk("<-- %s\n", __func__);
6073 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6074 .rpc_call_prepare = nfs4_layoutget_prepare,
6075 .rpc_call_done = nfs4_layoutget_done,
6076 .rpc_release = nfs4_layoutget_release,
6079 struct pnfs_layout_segment *
6080 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6082 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6083 size_t max_pages = max_response_pages(server);
6084 struct rpc_task *task;
6085 struct rpc_message msg = {
6086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6087 .rpc_argp = &lgp->args,
6088 .rpc_resp = &lgp->res,
6090 struct rpc_task_setup task_setup_data = {
6091 .rpc_client = server->client,
6092 .rpc_message = &msg,
6093 .callback_ops = &nfs4_layoutget_call_ops,
6094 .callback_data = lgp,
6095 .flags = RPC_TASK_ASYNC,
6097 struct pnfs_layout_segment *lseg = NULL;
6100 dprintk("--> %s\n", __func__);
6102 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6103 if (!lgp->args.layout.pages) {
6104 nfs4_layoutget_release(lgp);
6105 return ERR_PTR(-ENOMEM);
6107 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6109 lgp->res.layoutp = &lgp->args.layout;
6110 lgp->res.seq_res.sr_slot = NULL;
6111 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6112 task = rpc_run_task(&task_setup_data);
6114 return ERR_CAST(task);
6115 status = nfs4_wait_for_completion_rpc_task(task);
6117 status = task->tk_status;
6119 lseg = pnfs_layout_process(lgp);
6121 dprintk("<-- %s status=%d\n", __func__, status);
6123 return ERR_PTR(status);
6128 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6130 struct nfs4_layoutreturn *lrp = calldata;
6132 dprintk("--> %s\n", __func__);
6133 nfs41_setup_sequence(lrp->clp->cl_session,
6134 &lrp->args.seq_args,
6139 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6141 struct nfs4_layoutreturn *lrp = calldata;
6142 struct nfs_server *server;
6144 dprintk("--> %s\n", __func__);
6146 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
6149 server = NFS_SERVER(lrp->args.inode);
6150 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6151 rpc_restart_call_prepare(task);
6154 dprintk("<-- %s\n", __func__);
6157 static void nfs4_layoutreturn_release(void *calldata)
6159 struct nfs4_layoutreturn *lrp = calldata;
6160 struct pnfs_layout_hdr *lo = lrp->args.layout;
6162 dprintk("--> %s\n", __func__);
6163 spin_lock(&lo->plh_inode->i_lock);
6164 if (lrp->res.lrs_present)
6165 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6166 lo->plh_block_lgets--;
6167 spin_unlock(&lo->plh_inode->i_lock);
6168 pnfs_put_layout_hdr(lrp->args.layout);
6170 dprintk("<-- %s\n", __func__);
6173 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6174 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6175 .rpc_call_done = nfs4_layoutreturn_done,
6176 .rpc_release = nfs4_layoutreturn_release,
6179 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6181 struct rpc_task *task;
6182 struct rpc_message msg = {
6183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6184 .rpc_argp = &lrp->args,
6185 .rpc_resp = &lrp->res,
6187 struct rpc_task_setup task_setup_data = {
6188 .rpc_client = lrp->clp->cl_rpcclient,
6189 .rpc_message = &msg,
6190 .callback_ops = &nfs4_layoutreturn_call_ops,
6191 .callback_data = lrp,
6195 dprintk("--> %s\n", __func__);
6196 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6197 task = rpc_run_task(&task_setup_data);
6199 return PTR_ERR(task);
6200 status = task->tk_status;
6201 dprintk("<-- %s status=%d\n", __func__, status);
6207 * Retrieve the list of Data Server devices from the MDS.
6209 static int _nfs4_getdevicelist(struct nfs_server *server,
6210 const struct nfs_fh *fh,
6211 struct pnfs_devicelist *devlist)
6213 struct nfs4_getdevicelist_args args = {
6215 .layoutclass = server->pnfs_curr_ld->id,
6217 struct nfs4_getdevicelist_res res = {
6220 struct rpc_message msg = {
6221 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6227 dprintk("--> %s\n", __func__);
6228 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6230 dprintk("<-- %s status=%d\n", __func__, status);
6234 int nfs4_proc_getdevicelist(struct nfs_server *server,
6235 const struct nfs_fh *fh,
6236 struct pnfs_devicelist *devlist)
6238 struct nfs4_exception exception = { };
6242 err = nfs4_handle_exception(server,
6243 _nfs4_getdevicelist(server, fh, devlist),
6245 } while (exception.retry);
6247 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6248 err, devlist->num_devs);
6252 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6255 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6257 struct nfs4_getdeviceinfo_args args = {
6260 struct nfs4_getdeviceinfo_res res = {
6263 struct rpc_message msg = {
6264 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6270 dprintk("--> %s\n", __func__);
6271 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6272 dprintk("<-- %s status=%d\n", __func__, status);
6277 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6279 struct nfs4_exception exception = { };
6283 err = nfs4_handle_exception(server,
6284 _nfs4_proc_getdeviceinfo(server, pdev),
6286 } while (exception.retry);
6289 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6291 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6293 struct nfs4_layoutcommit_data *data = calldata;
6294 struct nfs_server *server = NFS_SERVER(data->args.inode);
6295 struct nfs4_session *session = nfs4_get_session(server);
6297 nfs41_setup_sequence(session,
6298 &data->args.seq_args,
6304 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6306 struct nfs4_layoutcommit_data *data = calldata;
6307 struct nfs_server *server = NFS_SERVER(data->args.inode);
6309 if (!nfs41_sequence_done(task, &data->res.seq_res))
6312 switch (task->tk_status) { /* Just ignore these failures */
6313 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6314 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6315 case -NFS4ERR_BADLAYOUT: /* no layout */
6316 case -NFS4ERR_GRACE: /* loca_recalim always false */
6317 task->tk_status = 0;
6320 nfs_post_op_update_inode_force_wcc(data->args.inode,
6324 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6325 rpc_restart_call_prepare(task);
6331 static void nfs4_layoutcommit_release(void *calldata)
6333 struct nfs4_layoutcommit_data *data = calldata;
6334 struct pnfs_layout_segment *lseg, *tmp;
6335 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6337 pnfs_cleanup_layoutcommit(data);
6338 /* Matched by references in pnfs_set_layoutcommit */
6339 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6340 list_del_init(&lseg->pls_lc_list);
6341 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6343 pnfs_put_lseg(lseg);
6346 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6347 smp_mb__after_clear_bit();
6348 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6350 put_rpccred(data->cred);
6354 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6355 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6356 .rpc_call_done = nfs4_layoutcommit_done,
6357 .rpc_release = nfs4_layoutcommit_release,
6361 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6363 struct rpc_message msg = {
6364 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6365 .rpc_argp = &data->args,
6366 .rpc_resp = &data->res,
6367 .rpc_cred = data->cred,
6369 struct rpc_task_setup task_setup_data = {
6370 .task = &data->task,
6371 .rpc_client = NFS_CLIENT(data->args.inode),
6372 .rpc_message = &msg,
6373 .callback_ops = &nfs4_layoutcommit_ops,
6374 .callback_data = data,
6375 .flags = RPC_TASK_ASYNC,
6377 struct rpc_task *task;
6380 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6381 "lbw: %llu inode %lu\n",
6382 data->task.tk_pid, sync,
6383 data->args.lastbytewritten,
6384 data->args.inode->i_ino);
6386 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6387 task = rpc_run_task(&task_setup_data);
6389 return PTR_ERR(task);
6392 status = nfs4_wait_for_completion_rpc_task(task);
6395 status = task->tk_status;
6397 dprintk("%s: status %d\n", __func__, status);
6403 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6404 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6406 struct nfs41_secinfo_no_name_args args = {
6407 .style = SECINFO_STYLE_CURRENT_FH,
6409 struct nfs4_secinfo_res res = {
6412 struct rpc_message msg = {
6413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6417 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6421 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6422 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6424 struct nfs4_exception exception = { };
6427 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6430 case -NFS4ERR_WRONGSEC:
6431 case -NFS4ERR_NOTSUPP:
6434 err = nfs4_handle_exception(server, err, &exception);
6436 } while (exception.retry);
6442 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6443 struct nfs_fsinfo *info)
6447 rpc_authflavor_t flavor;
6448 struct nfs4_secinfo_flavors *flavors;
6450 page = alloc_page(GFP_KERNEL);
6456 flavors = page_address(page);
6457 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6460 * Fall back on "guess and check" method if
6461 * the server doesn't support SECINFO_NO_NAME
6463 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6464 err = nfs4_find_root_sec(server, fhandle, info);
6470 flavor = nfs_find_best_sec(flavors);
6472 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6482 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6485 struct nfs41_test_stateid_args args = {
6488 struct nfs41_test_stateid_res res;
6489 struct rpc_message msg = {
6490 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6495 dprintk("NFS call test_stateid %p\n", stateid);
6496 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6497 nfs4_set_sequence_privileged(&args.seq_args);
6498 status = nfs4_call_sync_sequence(server->client, server, &msg,
6499 &args.seq_args, &res.seq_res);
6500 if (status != NFS_OK) {
6501 dprintk("NFS reply test_stateid: failed, %d\n", status);
6504 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
6509 * nfs41_test_stateid - perform a TEST_STATEID operation
6511 * @server: server / transport on which to perform the operation
6512 * @stateid: state ID to test
6514 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6515 * Otherwise a negative NFS4ERR value is returned if the operation
6516 * failed or the state ID is not currently valid.
6518 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6520 struct nfs4_exception exception = { };
6523 err = _nfs41_test_stateid(server, stateid);
6524 if (err != -NFS4ERR_DELAY)
6526 nfs4_handle_exception(server, err, &exception);
6527 } while (exception.retry);
6531 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6533 struct nfs41_free_stateid_args args = {
6536 struct nfs41_free_stateid_res res;
6537 struct rpc_message msg = {
6538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6544 dprintk("NFS call free_stateid %p\n", stateid);
6545 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6546 nfs4_set_sequence_privileged(&args.seq_args);
6547 status = nfs4_call_sync_sequence(server->client, server, &msg,
6548 &args.seq_args, &res.seq_res);
6549 dprintk("NFS reply free_stateid: %d\n", status);
6554 * nfs41_free_stateid - perform a FREE_STATEID operation
6556 * @server: server / transport on which to perform the operation
6557 * @stateid: state ID to release
6559 * Returns NFS_OK if the server freed "stateid". Otherwise a
6560 * negative NFS4ERR value is returned.
6562 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6564 struct nfs4_exception exception = { };
6567 err = _nfs4_free_stateid(server, stateid);
6568 if (err != -NFS4ERR_DELAY)
6570 nfs4_handle_exception(server, err, &exception);
6571 } while (exception.retry);
6575 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6576 const nfs4_stateid *s2)
6578 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6581 if (s1->seqid == s2->seqid)
6583 if (s1->seqid == 0 || s2->seqid == 0)
6589 #endif /* CONFIG_NFS_V4_1 */
6591 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6592 const nfs4_stateid *s2)
6594 return nfs4_stateid_match(s1, s2);
6598 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6599 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6600 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6601 .recover_open = nfs4_open_reclaim,
6602 .recover_lock = nfs4_lock_reclaim,
6603 .establish_clid = nfs4_init_clientid,
6604 .get_clid_cred = nfs4_get_setclientid_cred,
6605 .detect_trunking = nfs40_discover_server_trunking,
6608 #if defined(CONFIG_NFS_V4_1)
6609 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6610 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6611 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6612 .recover_open = nfs4_open_reclaim,
6613 .recover_lock = nfs4_lock_reclaim,
6614 .establish_clid = nfs41_init_clientid,
6615 .get_clid_cred = nfs4_get_exchange_id_cred,
6616 .reclaim_complete = nfs41_proc_reclaim_complete,
6617 .detect_trunking = nfs41_discover_server_trunking,
6619 #endif /* CONFIG_NFS_V4_1 */
6621 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6622 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6623 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6624 .recover_open = nfs4_open_expired,
6625 .recover_lock = nfs4_lock_expired,
6626 .establish_clid = nfs4_init_clientid,
6627 .get_clid_cred = nfs4_get_setclientid_cred,
6630 #if defined(CONFIG_NFS_V4_1)
6631 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6632 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6633 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6634 .recover_open = nfs41_open_expired,
6635 .recover_lock = nfs41_lock_expired,
6636 .establish_clid = nfs41_init_clientid,
6637 .get_clid_cred = nfs4_get_exchange_id_cred,
6639 #endif /* CONFIG_NFS_V4_1 */
6641 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6642 .sched_state_renewal = nfs4_proc_async_renew,
6643 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6644 .renew_lease = nfs4_proc_renew,
6647 #if defined(CONFIG_NFS_V4_1)
6648 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6649 .sched_state_renewal = nfs41_proc_async_sequence,
6650 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6651 .renew_lease = nfs4_proc_sequence,
6655 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6657 .call_sync = _nfs4_call_sync,
6658 .match_stateid = nfs4_match_stateid,
6659 .find_root_sec = nfs4_find_root_sec,
6660 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6661 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6662 .state_renewal_ops = &nfs40_state_renewal_ops,
6665 #if defined(CONFIG_NFS_V4_1)
6666 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6668 .call_sync = nfs4_call_sync_sequence,
6669 .match_stateid = nfs41_match_stateid,
6670 .find_root_sec = nfs41_find_root_sec,
6671 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6672 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6673 .state_renewal_ops = &nfs41_state_renewal_ops,
6677 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6678 [0] = &nfs_v4_0_minor_ops,
6679 #if defined(CONFIG_NFS_V4_1)
6680 [1] = &nfs_v4_1_minor_ops,
6684 const struct inode_operations nfs4_dir_inode_operations = {
6685 .create = nfs_create,
6686 .lookup = nfs_lookup,
6687 .atomic_open = nfs_atomic_open,
6689 .unlink = nfs_unlink,
6690 .symlink = nfs_symlink,
6694 .rename = nfs_rename,
6695 .permission = nfs_permission,
6696 .getattr = nfs_getattr,
6697 .setattr = nfs_setattr,
6698 .getxattr = generic_getxattr,
6699 .setxattr = generic_setxattr,
6700 .listxattr = generic_listxattr,
6701 .removexattr = generic_removexattr,
6704 static const struct inode_operations nfs4_file_inode_operations = {
6705 .permission = nfs_permission,
6706 .getattr = nfs_getattr,
6707 .setattr = nfs_setattr,
6708 .getxattr = generic_getxattr,
6709 .setxattr = generic_setxattr,
6710 .listxattr = generic_listxattr,
6711 .removexattr = generic_removexattr,
6714 const struct nfs_rpc_ops nfs_v4_clientops = {
6715 .version = 4, /* protocol version */
6716 .dentry_ops = &nfs4_dentry_operations,
6717 .dir_inode_ops = &nfs4_dir_inode_operations,
6718 .file_inode_ops = &nfs4_file_inode_operations,
6719 .file_ops = &nfs4_file_operations,
6720 .getroot = nfs4_proc_get_root,
6721 .submount = nfs4_submount,
6722 .try_mount = nfs4_try_mount,
6723 .getattr = nfs4_proc_getattr,
6724 .setattr = nfs4_proc_setattr,
6725 .lookup = nfs4_proc_lookup,
6726 .access = nfs4_proc_access,
6727 .readlink = nfs4_proc_readlink,
6728 .create = nfs4_proc_create,
6729 .remove = nfs4_proc_remove,
6730 .unlink_setup = nfs4_proc_unlink_setup,
6731 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
6732 .unlink_done = nfs4_proc_unlink_done,
6733 .rename = nfs4_proc_rename,
6734 .rename_setup = nfs4_proc_rename_setup,
6735 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
6736 .rename_done = nfs4_proc_rename_done,
6737 .link = nfs4_proc_link,
6738 .symlink = nfs4_proc_symlink,
6739 .mkdir = nfs4_proc_mkdir,
6740 .rmdir = nfs4_proc_remove,
6741 .readdir = nfs4_proc_readdir,
6742 .mknod = nfs4_proc_mknod,
6743 .statfs = nfs4_proc_statfs,
6744 .fsinfo = nfs4_proc_fsinfo,
6745 .pathconf = nfs4_proc_pathconf,
6746 .set_capabilities = nfs4_server_capabilities,
6747 .decode_dirent = nfs4_decode_dirent,
6748 .read_setup = nfs4_proc_read_setup,
6749 .read_pageio_init = pnfs_pageio_init_read,
6750 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
6751 .read_done = nfs4_read_done,
6752 .write_setup = nfs4_proc_write_setup,
6753 .write_pageio_init = pnfs_pageio_init_write,
6754 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6755 .write_done = nfs4_write_done,
6756 .commit_setup = nfs4_proc_commit_setup,
6757 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
6758 .commit_done = nfs4_commit_done,
6759 .lock = nfs4_proc_lock,
6760 .clear_acl_cache = nfs4_zap_acl_attr,
6761 .close_context = nfs4_close_context,
6762 .open_context = nfs4_atomic_open,
6763 .have_delegation = nfs4_have_delegation,
6764 .return_delegation = nfs4_inode_return_delegation,
6765 .alloc_client = nfs4_alloc_client,
6766 .init_client = nfs4_init_client,
6767 .free_client = nfs4_free_client,
6768 .create_server = nfs4_create_server,
6769 .clone_server = nfs_clone_server,
6772 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6773 .prefix = XATTR_NAME_NFSV4_ACL,
6774 .list = nfs4_xattr_list_nfs4_acl,
6775 .get = nfs4_xattr_get_nfs4_acl,
6776 .set = nfs4_xattr_set_nfs4_acl,
6779 const struct xattr_handler *nfs4_xattr_handlers[] = {
6780 &nfs4_xattr_nfs4_acl_handler,