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
337 ret = nfs4_delay(server->client, &exception->timeout);
340 case -NFS4ERR_RETRY_UNCACHED_REP:
341 case -NFS4ERR_OLD_STATEID:
342 exception->retry = 1;
344 case -NFS4ERR_BADOWNER:
345 /* The following works around a Linux server bug! */
346 case -NFS4ERR_BADNAME:
347 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
348 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
349 exception->retry = 1;
350 printk(KERN_WARNING "NFS: v4 server %s "
351 "does not accept raw "
353 "Reenabling the idmapper.\n",
354 server->nfs_client->cl_hostname);
357 /* We failed to handle the error */
358 return nfs4_map_errors(ret);
360 ret = nfs4_wait_clnt_recover(clp);
362 exception->retry = 1;
367 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
369 spin_lock(&clp->cl_lock);
370 if (time_before(clp->cl_last_renewal,timestamp))
371 clp->cl_last_renewal = timestamp;
372 spin_unlock(&clp->cl_lock);
375 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
377 do_renew_lease(server->nfs_client, timestamp);
380 #if defined(CONFIG_NFS_V4_1)
382 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
384 struct nfs4_session *session;
385 struct nfs4_slot_table *tbl;
386 bool send_new_highest_used_slotid = false;
389 /* just wake up the next guy waiting since
390 * we may have not consumed a slot after all */
391 dprintk("%s: No slot\n", __func__);
394 tbl = res->sr_slot->table;
395 session = tbl->session;
397 spin_lock(&tbl->slot_tbl_lock);
398 /* Be nice to the server: try to ensure that the last transmitted
399 * value for highest_user_slotid <= target_highest_slotid
401 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
402 send_new_highest_used_slotid = true;
404 nfs4_free_slot(tbl, res->sr_slot);
406 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
407 send_new_highest_used_slotid = false;
408 if (!nfs4_session_draining(session)) {
409 if (rpc_wake_up_next(&tbl->slot_tbl_waitq) != NULL)
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;
426 * sr_status remains 1 if an RPC level error occurred. The server
427 * may or may not have processed the sequence operation..
428 * Proceed as if the server received and processed the sequence
431 if (res->sr_status == 1)
432 res->sr_status = NFS_OK;
434 /* don't increment the sequence number if the task wasn't sent */
435 if (!RPC_WAS_SENT(task))
439 session = slot->table->session;
441 /* Check the SEQUENCE operation status */
442 switch (res->sr_status) {
444 /* Update the slot's sequence and clientid lease timer */
446 timestamp = slot->renewal_time;
448 do_renew_lease(clp, timestamp);
449 /* Check sequence flags */
450 if (res->sr_status_flags != 0)
451 nfs4_schedule_lease_recovery(clp);
452 nfs41_update_target_slotid(slot->table, slot, res);
455 /* The server detected a resend of the RPC call and
456 * returned NFS4ERR_DELAY as per Section 2.10.6.2
459 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
465 /* Just update the slot sequence no. */
469 /* The session may be reset by one of the error handlers. */
470 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
471 nfs41_sequence_free_slot(res);
474 if (!rpc_restart_call(task))
476 rpc_delay(task, NFS4_POLL_RETRY_MAX);
480 static int nfs4_sequence_done(struct rpc_task *task,
481 struct nfs4_sequence_res *res)
483 if (res->sr_slot == NULL)
485 return nfs41_sequence_done(task, res);
488 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
489 struct nfs4_sequence_res *res, int cache_reply)
491 args->sa_slot = NULL;
492 args->sa_cache_this = 0;
493 args->sa_privileged = 0;
495 args->sa_cache_this = 1;
499 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
501 args->sa_privileged = 1;
504 int nfs41_setup_sequence(struct nfs4_session *session,
505 struct nfs4_sequence_args *args,
506 struct nfs4_sequence_res *res,
507 struct rpc_task *task)
509 struct nfs4_slot *slot;
510 struct nfs4_slot_table *tbl;
512 dprintk("--> %s\n", __func__);
513 /* slot already allocated? */
514 if (res->sr_slot != NULL)
517 tbl = &session->fc_slot_table;
519 task->tk_timeout = 0;
521 spin_lock(&tbl->slot_tbl_lock);
522 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
523 !args->sa_privileged) {
524 /* The state manager will wait until the slot table is empty */
525 dprintk("%s session is draining\n", __func__);
529 slot = nfs4_alloc_slot(tbl);
531 /* If out of memory, try again in 1/4 second */
532 if (slot == ERR_PTR(-ENOMEM))
533 task->tk_timeout = HZ >> 2;
534 dprintk("<-- %s: no free slots\n", __func__);
537 spin_unlock(&tbl->slot_tbl_lock);
539 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
541 args->sa_slot = slot;
543 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
544 slot->slot_nr, slot->seq_nr);
547 res->sr_status_flags = 0;
549 * sr_status is only set in decode_sequence, and so will remain
550 * set to 1 if an rpc level failure occurs.
554 rpc_call_start(task);
557 /* Privileged tasks are queued with top priority */
558 if (args->sa_privileged)
559 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
560 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
561 spin_unlock(&tbl->slot_tbl_lock);
564 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
566 int nfs4_setup_sequence(const struct nfs_server *server,
567 struct nfs4_sequence_args *args,
568 struct nfs4_sequence_res *res,
569 struct rpc_task *task)
571 struct nfs4_session *session = nfs4_get_session(server);
574 if (session == NULL) {
575 rpc_call_start(task);
579 dprintk("--> %s clp %p session %p sr_slot %d\n",
580 __func__, session->clp, session, res->sr_slot ?
581 res->sr_slot->slot_nr : -1);
583 ret = nfs41_setup_sequence(session, args, res, task);
585 dprintk("<-- %s status=%d\n", __func__, ret);
589 struct nfs41_call_sync_data {
590 const struct nfs_server *seq_server;
591 struct nfs4_sequence_args *seq_args;
592 struct nfs4_sequence_res *seq_res;
595 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
597 struct nfs41_call_sync_data *data = calldata;
598 struct nfs4_session *session = nfs4_get_session(data->seq_server);
600 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
602 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
605 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
607 struct nfs41_call_sync_data *data = calldata;
609 nfs41_sequence_done(task, data->seq_res);
612 static const struct rpc_call_ops nfs41_call_sync_ops = {
613 .rpc_call_prepare = nfs41_call_sync_prepare,
614 .rpc_call_done = nfs41_call_sync_done,
617 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
618 struct nfs_server *server,
619 struct rpc_message *msg,
620 struct nfs4_sequence_args *args,
621 struct nfs4_sequence_res *res)
624 struct rpc_task *task;
625 struct nfs41_call_sync_data data = {
626 .seq_server = server,
630 struct rpc_task_setup task_setup = {
633 .callback_ops = &nfs41_call_sync_ops,
634 .callback_data = &data
637 task = rpc_run_task(&task_setup);
641 ret = task->tk_status;
649 void nfs41_init_sequence(struct nfs4_sequence_args *args,
650 struct nfs4_sequence_res *res, int cache_reply)
654 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
659 static int nfs4_sequence_done(struct rpc_task *task,
660 struct nfs4_sequence_res *res)
664 #endif /* CONFIG_NFS_V4_1 */
667 int _nfs4_call_sync(struct rpc_clnt *clnt,
668 struct nfs_server *server,
669 struct rpc_message *msg,
670 struct nfs4_sequence_args *args,
671 struct nfs4_sequence_res *res)
673 return rpc_call_sync(clnt, msg, 0);
677 int nfs4_call_sync(struct rpc_clnt *clnt,
678 struct nfs_server *server,
679 struct rpc_message *msg,
680 struct nfs4_sequence_args *args,
681 struct nfs4_sequence_res *res,
684 nfs41_init_sequence(args, res, cache_reply);
685 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
689 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
691 struct nfs_inode *nfsi = NFS_I(dir);
693 spin_lock(&dir->i_lock);
694 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
695 if (!cinfo->atomic || cinfo->before != dir->i_version)
696 nfs_force_lookup_revalidate(dir);
697 dir->i_version = cinfo->after;
698 spin_unlock(&dir->i_lock);
701 struct nfs4_opendata {
703 struct nfs_openargs o_arg;
704 struct nfs_openres o_res;
705 struct nfs_open_confirmargs c_arg;
706 struct nfs_open_confirmres c_res;
707 struct nfs4_string owner_name;
708 struct nfs4_string group_name;
709 struct nfs_fattr f_attr;
711 struct dentry *dentry;
712 struct nfs4_state_owner *owner;
713 struct nfs4_state *state;
715 unsigned long timestamp;
716 unsigned int rpc_done : 1;
722 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
724 p->o_res.f_attr = &p->f_attr;
725 p->o_res.seqid = p->o_arg.seqid;
726 p->c_res.seqid = p->c_arg.seqid;
727 p->o_res.server = p->o_arg.server;
728 p->o_res.access_request = p->o_arg.access;
729 nfs_fattr_init(&p->f_attr);
730 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
733 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
734 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
735 const struct iattr *attrs,
738 struct dentry *parent = dget_parent(dentry);
739 struct inode *dir = parent->d_inode;
740 struct nfs_server *server = NFS_SERVER(dir);
741 struct nfs4_opendata *p;
743 p = kzalloc(sizeof(*p), gfp_mask);
746 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
747 if (p->o_arg.seqid == NULL)
749 nfs_sb_active(dentry->d_sb);
750 p->dentry = dget(dentry);
753 atomic_inc(&sp->so_count);
754 p->o_arg.fh = NFS_FH(dir);
755 p->o_arg.open_flags = flags;
756 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
757 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
758 * will return permission denied for all bits until close */
759 if (!(flags & O_EXCL)) {
760 /* ask server to check for all possible rights as results
762 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
763 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
765 p->o_arg.clientid = server->nfs_client->cl_clientid;
766 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
767 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
768 p->o_arg.name = &dentry->d_name;
769 p->o_arg.server = server;
770 p->o_arg.bitmask = server->attr_bitmask;
771 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
772 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
773 if (attrs != NULL && attrs->ia_valid != 0) {
776 p->o_arg.u.attrs = &p->attrs;
777 memcpy(&p->attrs, attrs, sizeof(p->attrs));
780 verf[1] = current->pid;
781 memcpy(p->o_arg.u.verifier.data, verf,
782 sizeof(p->o_arg.u.verifier.data));
784 p->c_arg.fh = &p->o_res.fh;
785 p->c_arg.stateid = &p->o_res.stateid;
786 p->c_arg.seqid = p->o_arg.seqid;
787 nfs4_init_opendata_res(p);
797 static void nfs4_opendata_free(struct kref *kref)
799 struct nfs4_opendata *p = container_of(kref,
800 struct nfs4_opendata, kref);
801 struct super_block *sb = p->dentry->d_sb;
803 nfs_free_seqid(p->o_arg.seqid);
804 if (p->state != NULL)
805 nfs4_put_open_state(p->state);
806 nfs4_put_state_owner(p->owner);
810 nfs_fattr_free_names(&p->f_attr);
814 static void nfs4_opendata_put(struct nfs4_opendata *p)
817 kref_put(&p->kref, nfs4_opendata_free);
820 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
824 ret = rpc_wait_for_completion_task(task);
828 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
832 if (open_mode & (O_EXCL|O_TRUNC))
834 switch (mode & (FMODE_READ|FMODE_WRITE)) {
836 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
837 && state->n_rdonly != 0;
840 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
841 && state->n_wronly != 0;
843 case FMODE_READ|FMODE_WRITE:
844 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
845 && state->n_rdwr != 0;
851 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
853 if (delegation == NULL)
855 if ((delegation->type & fmode) != fmode)
857 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
859 nfs_mark_delegation_referenced(delegation);
863 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
872 case FMODE_READ|FMODE_WRITE:
875 nfs4_state_set_mode_locked(state, state->state | fmode);
878 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
880 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
881 nfs4_stateid_copy(&state->stateid, stateid);
882 nfs4_stateid_copy(&state->open_stateid, stateid);
885 set_bit(NFS_O_RDONLY_STATE, &state->flags);
888 set_bit(NFS_O_WRONLY_STATE, &state->flags);
890 case FMODE_READ|FMODE_WRITE:
891 set_bit(NFS_O_RDWR_STATE, &state->flags);
895 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
897 write_seqlock(&state->seqlock);
898 nfs_set_open_stateid_locked(state, stateid, fmode);
899 write_sequnlock(&state->seqlock);
902 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
905 * Protect the call to nfs4_state_set_mode_locked and
906 * serialise the stateid update
908 write_seqlock(&state->seqlock);
909 if (deleg_stateid != NULL) {
910 nfs4_stateid_copy(&state->stateid, deleg_stateid);
911 set_bit(NFS_DELEGATED_STATE, &state->flags);
913 if (open_stateid != NULL)
914 nfs_set_open_stateid_locked(state, open_stateid, fmode);
915 write_sequnlock(&state->seqlock);
916 spin_lock(&state->owner->so_lock);
917 update_open_stateflags(state, fmode);
918 spin_unlock(&state->owner->so_lock);
921 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
923 struct nfs_inode *nfsi = NFS_I(state->inode);
924 struct nfs_delegation *deleg_cur;
927 fmode &= (FMODE_READ|FMODE_WRITE);
930 deleg_cur = rcu_dereference(nfsi->delegation);
931 if (deleg_cur == NULL)
934 spin_lock(&deleg_cur->lock);
935 if (nfsi->delegation != deleg_cur ||
936 (deleg_cur->type & fmode) != fmode)
937 goto no_delegation_unlock;
939 if (delegation == NULL)
940 delegation = &deleg_cur->stateid;
941 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
942 goto no_delegation_unlock;
944 nfs_mark_delegation_referenced(deleg_cur);
945 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
947 no_delegation_unlock:
948 spin_unlock(&deleg_cur->lock);
952 if (!ret && open_stateid != NULL) {
953 __update_open_stateid(state, open_stateid, NULL, fmode);
961 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
963 struct nfs_delegation *delegation;
966 delegation = rcu_dereference(NFS_I(inode)->delegation);
967 if (delegation == NULL || (delegation->type & fmode) == fmode) {
972 nfs4_inode_return_delegation(inode);
975 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
977 struct nfs4_state *state = opendata->state;
978 struct nfs_inode *nfsi = NFS_I(state->inode);
979 struct nfs_delegation *delegation;
980 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
981 fmode_t fmode = opendata->o_arg.fmode;
982 nfs4_stateid stateid;
986 if (can_open_cached(state, fmode, open_mode)) {
987 spin_lock(&state->owner->so_lock);
988 if (can_open_cached(state, fmode, open_mode)) {
989 update_open_stateflags(state, fmode);
990 spin_unlock(&state->owner->so_lock);
991 goto out_return_state;
993 spin_unlock(&state->owner->so_lock);
996 delegation = rcu_dereference(nfsi->delegation);
997 if (!can_open_delegated(delegation, fmode)) {
1001 /* Save the delegation */
1002 nfs4_stateid_copy(&stateid, &delegation->stateid);
1004 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1009 /* Try to update the stateid using the delegation */
1010 if (update_open_stateid(state, NULL, &stateid, fmode))
1011 goto out_return_state;
1014 return ERR_PTR(ret);
1016 atomic_inc(&state->count);
1021 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1023 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1024 struct nfs_delegation *delegation;
1025 int delegation_flags = 0;
1028 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1030 delegation_flags = delegation->flags;
1032 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1033 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1034 "returning a delegation for "
1035 "OPEN(CLAIM_DELEGATE_CUR)\n",
1037 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1038 nfs_inode_set_delegation(state->inode,
1039 data->owner->so_cred,
1042 nfs_inode_reclaim_delegation(state->inode,
1043 data->owner->so_cred,
1048 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1049 * and update the nfs4_state.
1051 static struct nfs4_state *
1052 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1054 struct inode *inode = data->state->inode;
1055 struct nfs4_state *state = data->state;
1058 if (!data->rpc_done) {
1059 ret = data->rpc_status;
1064 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1065 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1066 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1070 state = nfs4_get_open_state(inode, data->owner);
1074 ret = nfs_refresh_inode(inode, &data->f_attr);
1078 if (data->o_res.delegation_type != 0)
1079 nfs4_opendata_check_deleg(data, state);
1080 update_open_stateid(state, &data->o_res.stateid, NULL,
1085 return ERR_PTR(ret);
1089 static struct nfs4_state *
1090 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1092 struct inode *inode;
1093 struct nfs4_state *state = NULL;
1096 if (!data->rpc_done) {
1097 state = nfs4_try_open_cached(data);
1102 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1104 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1105 ret = PTR_ERR(inode);
1109 state = nfs4_get_open_state(inode, data->owner);
1112 if (data->o_res.delegation_type != 0)
1113 nfs4_opendata_check_deleg(data, state);
1114 update_open_stateid(state, &data->o_res.stateid, NULL,
1122 return ERR_PTR(ret);
1125 static struct nfs4_state *
1126 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1128 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1129 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1130 return _nfs4_opendata_to_nfs4_state(data);
1133 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1135 struct nfs_inode *nfsi = NFS_I(state->inode);
1136 struct nfs_open_context *ctx;
1138 spin_lock(&state->inode->i_lock);
1139 list_for_each_entry(ctx, &nfsi->open_files, list) {
1140 if (ctx->state != state)
1142 get_nfs_open_context(ctx);
1143 spin_unlock(&state->inode->i_lock);
1146 spin_unlock(&state->inode->i_lock);
1147 return ERR_PTR(-ENOENT);
1150 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1152 struct nfs4_opendata *opendata;
1154 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1155 if (opendata == NULL)
1156 return ERR_PTR(-ENOMEM);
1157 opendata->state = state;
1158 atomic_inc(&state->count);
1162 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1164 struct nfs4_state *newstate;
1167 opendata->o_arg.open_flags = 0;
1168 opendata->o_arg.fmode = fmode;
1169 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1170 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1171 nfs4_init_opendata_res(opendata);
1172 ret = _nfs4_recover_proc_open(opendata);
1175 newstate = nfs4_opendata_to_nfs4_state(opendata);
1176 if (IS_ERR(newstate))
1177 return PTR_ERR(newstate);
1178 nfs4_close_state(newstate, fmode);
1183 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1185 struct nfs4_state *newstate;
1188 /* memory barrier prior to reading state->n_* */
1189 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1191 if (state->n_rdwr != 0) {
1192 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1193 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1196 if (newstate != state)
1199 if (state->n_wronly != 0) {
1200 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1201 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1204 if (newstate != state)
1207 if (state->n_rdonly != 0) {
1208 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1209 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1212 if (newstate != state)
1216 * We may have performed cached opens for all three recoveries.
1217 * Check if we need to update the current stateid.
1219 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1220 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1221 write_seqlock(&state->seqlock);
1222 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1223 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1224 write_sequnlock(&state->seqlock);
1231 * reclaim state on the server after a reboot.
1233 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1235 struct nfs_delegation *delegation;
1236 struct nfs4_opendata *opendata;
1237 fmode_t delegation_type = 0;
1240 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1241 if (IS_ERR(opendata))
1242 return PTR_ERR(opendata);
1243 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1244 opendata->o_arg.fh = NFS_FH(state->inode);
1246 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1247 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1248 delegation_type = delegation->type;
1250 opendata->o_arg.u.delegation_type = delegation_type;
1251 status = nfs4_open_recover(opendata, state);
1252 nfs4_opendata_put(opendata);
1256 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1258 struct nfs_server *server = NFS_SERVER(state->inode);
1259 struct nfs4_exception exception = { };
1262 err = _nfs4_do_open_reclaim(ctx, state);
1263 if (err != -NFS4ERR_DELAY)
1265 nfs4_handle_exception(server, err, &exception);
1266 } while (exception.retry);
1270 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1272 struct nfs_open_context *ctx;
1275 ctx = nfs4_state_find_open_context(state);
1277 return PTR_ERR(ctx);
1278 ret = nfs4_do_open_reclaim(ctx, state);
1279 put_nfs_open_context(ctx);
1283 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1285 struct nfs4_opendata *opendata;
1288 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1289 if (IS_ERR(opendata))
1290 return PTR_ERR(opendata);
1291 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1292 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1293 ret = nfs4_open_recover(opendata, state);
1294 nfs4_opendata_put(opendata);
1298 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1300 struct nfs4_exception exception = { };
1301 struct nfs_server *server = NFS_SERVER(state->inode);
1304 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1310 case -NFS4ERR_BADSESSION:
1311 case -NFS4ERR_BADSLOT:
1312 case -NFS4ERR_BAD_HIGH_SLOT:
1313 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1314 case -NFS4ERR_DEADSESSION:
1315 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1317 case -NFS4ERR_STALE_CLIENTID:
1318 case -NFS4ERR_STALE_STATEID:
1319 case -NFS4ERR_EXPIRED:
1320 /* Don't recall a delegation if it was lost */
1321 nfs4_schedule_lease_recovery(server->nfs_client);
1325 * The show must go on: exit, but mark the
1326 * stateid as needing recovery.
1328 case -NFS4ERR_DELEG_REVOKED:
1329 case -NFS4ERR_ADMIN_REVOKED:
1330 case -NFS4ERR_BAD_STATEID:
1331 nfs_inode_find_state_and_recover(state->inode,
1333 nfs4_schedule_stateid_recovery(server, state);
1336 * User RPCSEC_GSS context has expired.
1337 * We cannot recover this stateid now, so
1338 * skip it and allow recovery thread to
1345 err = nfs4_handle_exception(server, err, &exception);
1346 } while (exception.retry);
1351 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1353 struct nfs4_opendata *data = calldata;
1355 data->rpc_status = task->tk_status;
1356 if (data->rpc_status == 0) {
1357 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1358 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1359 renew_lease(data->o_res.server, data->timestamp);
1364 static void nfs4_open_confirm_release(void *calldata)
1366 struct nfs4_opendata *data = calldata;
1367 struct nfs4_state *state = NULL;
1369 /* If this request hasn't been cancelled, do nothing */
1370 if (data->cancelled == 0)
1372 /* In case of error, no cleanup! */
1373 if (!data->rpc_done)
1375 state = nfs4_opendata_to_nfs4_state(data);
1377 nfs4_close_state(state, data->o_arg.fmode);
1379 nfs4_opendata_put(data);
1382 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1383 .rpc_call_done = nfs4_open_confirm_done,
1384 .rpc_release = nfs4_open_confirm_release,
1388 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1390 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1392 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1393 struct rpc_task *task;
1394 struct rpc_message msg = {
1395 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1396 .rpc_argp = &data->c_arg,
1397 .rpc_resp = &data->c_res,
1398 .rpc_cred = data->owner->so_cred,
1400 struct rpc_task_setup task_setup_data = {
1401 .rpc_client = server->client,
1402 .rpc_message = &msg,
1403 .callback_ops = &nfs4_open_confirm_ops,
1404 .callback_data = data,
1405 .workqueue = nfsiod_workqueue,
1406 .flags = RPC_TASK_ASYNC,
1410 kref_get(&data->kref);
1412 data->rpc_status = 0;
1413 data->timestamp = jiffies;
1414 task = rpc_run_task(&task_setup_data);
1416 return PTR_ERR(task);
1417 status = nfs4_wait_for_completion_rpc_task(task);
1419 data->cancelled = 1;
1422 status = data->rpc_status;
1427 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1429 struct nfs4_opendata *data = calldata;
1430 struct nfs4_state_owner *sp = data->owner;
1432 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1435 * Check if we still need to send an OPEN call, or if we can use
1436 * a delegation instead.
1438 if (data->state != NULL) {
1439 struct nfs_delegation *delegation;
1441 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1444 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1445 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1446 can_open_delegated(delegation, data->o_arg.fmode))
1447 goto unlock_no_action;
1450 /* Update client id. */
1451 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1452 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1453 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1454 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1455 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1457 data->timestamp = jiffies;
1458 if (nfs4_setup_sequence(data->o_arg.server,
1459 &data->o_arg.seq_args,
1460 &data->o_res.seq_res,
1462 nfs_release_seqid(data->o_arg.seqid);
1467 task->tk_action = NULL;
1470 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1472 struct nfs4_opendata *data = calldata;
1474 data->rpc_status = task->tk_status;
1476 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1479 if (task->tk_status == 0) {
1480 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1481 switch (data->o_res.f_attr->mode & S_IFMT) {
1485 data->rpc_status = -ELOOP;
1488 data->rpc_status = -EISDIR;
1491 data->rpc_status = -ENOTDIR;
1494 renew_lease(data->o_res.server, data->timestamp);
1495 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1496 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1501 static void nfs4_open_release(void *calldata)
1503 struct nfs4_opendata *data = calldata;
1504 struct nfs4_state *state = NULL;
1506 /* If this request hasn't been cancelled, do nothing */
1507 if (data->cancelled == 0)
1509 /* In case of error, no cleanup! */
1510 if (data->rpc_status != 0 || !data->rpc_done)
1512 /* In case we need an open_confirm, no cleanup! */
1513 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1515 state = nfs4_opendata_to_nfs4_state(data);
1517 nfs4_close_state(state, data->o_arg.fmode);
1519 nfs4_opendata_put(data);
1522 static const struct rpc_call_ops nfs4_open_ops = {
1523 .rpc_call_prepare = nfs4_open_prepare,
1524 .rpc_call_done = nfs4_open_done,
1525 .rpc_release = nfs4_open_release,
1528 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1530 struct inode *dir = data->dir->d_inode;
1531 struct nfs_server *server = NFS_SERVER(dir);
1532 struct nfs_openargs *o_arg = &data->o_arg;
1533 struct nfs_openres *o_res = &data->o_res;
1534 struct rpc_task *task;
1535 struct rpc_message msg = {
1536 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1539 .rpc_cred = data->owner->so_cred,
1541 struct rpc_task_setup task_setup_data = {
1542 .rpc_client = server->client,
1543 .rpc_message = &msg,
1544 .callback_ops = &nfs4_open_ops,
1545 .callback_data = data,
1546 .workqueue = nfsiod_workqueue,
1547 .flags = RPC_TASK_ASYNC,
1551 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1552 kref_get(&data->kref);
1554 data->rpc_status = 0;
1555 data->cancelled = 0;
1557 nfs4_set_sequence_privileged(&o_arg->seq_args);
1558 task = rpc_run_task(&task_setup_data);
1560 return PTR_ERR(task);
1561 status = nfs4_wait_for_completion_rpc_task(task);
1563 data->cancelled = 1;
1566 status = data->rpc_status;
1572 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1574 struct inode *dir = data->dir->d_inode;
1575 struct nfs_openres *o_res = &data->o_res;
1578 status = nfs4_run_open_task(data, 1);
1579 if (status != 0 || !data->rpc_done)
1582 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1584 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1585 status = _nfs4_proc_open_confirm(data);
1593 static int nfs4_opendata_access(struct rpc_cred *cred,
1594 struct nfs4_opendata *opendata,
1595 struct nfs4_state *state, fmode_t fmode)
1597 struct nfs_access_entry cache;
1600 /* access call failed or for some reason the server doesn't
1601 * support any access modes -- defer access call until later */
1602 if (opendata->o_res.access_supported == 0)
1606 /* don't check MAY_WRITE - a newly created file may not have
1607 * write mode bits, but POSIX allows the creating process to write */
1608 if (fmode & FMODE_READ)
1610 if (fmode & FMODE_EXEC)
1614 cache.jiffies = jiffies;
1615 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1616 nfs_access_add_cache(state->inode, &cache);
1618 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1621 /* even though OPEN succeeded, access is denied. Close the file */
1622 nfs4_close_state(state, fmode);
1627 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1629 static int _nfs4_proc_open(struct nfs4_opendata *data)
1631 struct inode *dir = data->dir->d_inode;
1632 struct nfs_server *server = NFS_SERVER(dir);
1633 struct nfs_openargs *o_arg = &data->o_arg;
1634 struct nfs_openres *o_res = &data->o_res;
1637 status = nfs4_run_open_task(data, 0);
1638 if (!data->rpc_done)
1641 if (status == -NFS4ERR_BADNAME &&
1642 !(o_arg->open_flags & O_CREAT))
1647 nfs_fattr_map_and_free_names(server, &data->f_attr);
1649 if (o_arg->open_flags & O_CREAT)
1650 update_changeattr(dir, &o_res->cinfo);
1651 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1652 server->caps &= ~NFS_CAP_POSIX_LOCK;
1653 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1654 status = _nfs4_proc_open_confirm(data);
1658 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1659 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1663 static int nfs4_recover_expired_lease(struct nfs_server *server)
1665 return nfs4_client_recover_expired_lease(server->nfs_client);
1670 * reclaim state on the server after a network partition.
1671 * Assumes caller holds the appropriate lock
1673 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1675 struct nfs4_opendata *opendata;
1678 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1679 if (IS_ERR(opendata))
1680 return PTR_ERR(opendata);
1681 ret = nfs4_open_recover(opendata, state);
1683 d_drop(ctx->dentry);
1684 nfs4_opendata_put(opendata);
1688 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1690 struct nfs_server *server = NFS_SERVER(state->inode);
1691 struct nfs4_exception exception = { };
1695 err = _nfs4_open_expired(ctx, state);
1699 case -NFS4ERR_GRACE:
1700 case -NFS4ERR_DELAY:
1701 nfs4_handle_exception(server, err, &exception);
1704 } while (exception.retry);
1709 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1711 struct nfs_open_context *ctx;
1714 ctx = nfs4_state_find_open_context(state);
1716 return PTR_ERR(ctx);
1717 ret = nfs4_do_open_expired(ctx, state);
1718 put_nfs_open_context(ctx);
1722 #if defined(CONFIG_NFS_V4_1)
1723 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1725 struct nfs_server *server = NFS_SERVER(state->inode);
1726 nfs4_stateid *stateid = &state->stateid;
1729 /* If a state reset has been done, test_stateid is unneeded */
1730 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1733 status = nfs41_test_stateid(server, stateid);
1734 if (status != NFS_OK) {
1735 /* Free the stateid unless the server explicitly
1736 * informs us the stateid is unrecognized. */
1737 if (status != -NFS4ERR_BAD_STATEID)
1738 nfs41_free_stateid(server, stateid);
1739 nfs_remove_bad_delegation(state->inode);
1741 write_seqlock(&state->seqlock);
1742 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1743 write_sequnlock(&state->seqlock);
1744 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1749 * nfs41_check_open_stateid - possibly free an open stateid
1751 * @state: NFSv4 state for an inode
1753 * Returns NFS_OK if recovery for this stateid is now finished.
1754 * Otherwise a negative NFS4ERR value is returned.
1756 static int nfs41_check_open_stateid(struct nfs4_state *state)
1758 struct nfs_server *server = NFS_SERVER(state->inode);
1759 nfs4_stateid *stateid = &state->open_stateid;
1762 /* If a state reset has been done, test_stateid is unneeded */
1763 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1764 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1765 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1766 return -NFS4ERR_BAD_STATEID;
1768 status = nfs41_test_stateid(server, stateid);
1769 if (status != NFS_OK) {
1770 /* Free the stateid unless the server explicitly
1771 * informs us the stateid is unrecognized. */
1772 if (status != -NFS4ERR_BAD_STATEID)
1773 nfs41_free_stateid(server, stateid);
1775 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1776 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1777 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1782 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1786 nfs41_clear_delegation_stateid(state);
1787 status = nfs41_check_open_stateid(state);
1788 if (status != NFS_OK)
1789 status = nfs4_open_expired(sp, state);
1795 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1796 * fields corresponding to attributes that were used to store the verifier.
1797 * Make sure we clobber those fields in the later setattr call
1799 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1801 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1802 !(sattr->ia_valid & ATTR_ATIME_SET))
1803 sattr->ia_valid |= ATTR_ATIME;
1805 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1806 !(sattr->ia_valid & ATTR_MTIME_SET))
1807 sattr->ia_valid |= ATTR_MTIME;
1811 * Returns a referenced nfs4_state
1813 static int _nfs4_do_open(struct inode *dir,
1814 struct dentry *dentry,
1817 struct iattr *sattr,
1818 struct rpc_cred *cred,
1819 struct nfs4_state **res,
1820 struct nfs4_threshold **ctx_th)
1822 struct nfs4_state_owner *sp;
1823 struct nfs4_state *state = NULL;
1824 struct nfs_server *server = NFS_SERVER(dir);
1825 struct nfs4_opendata *opendata;
1828 /* Protect against reboot recovery conflicts */
1830 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1832 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1835 status = nfs4_recover_expired_lease(server);
1837 goto err_put_state_owner;
1838 if (dentry->d_inode != NULL)
1839 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1841 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1842 if (opendata == NULL)
1843 goto err_put_state_owner;
1845 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1846 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1847 if (!opendata->f_attr.mdsthreshold)
1848 goto err_opendata_put;
1849 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
1851 if (dentry->d_inode != NULL)
1852 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1854 status = _nfs4_proc_open(opendata);
1856 goto err_opendata_put;
1858 state = nfs4_opendata_to_nfs4_state(opendata);
1859 status = PTR_ERR(state);
1861 goto err_opendata_put;
1862 if (server->caps & NFS_CAP_POSIX_LOCK)
1863 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1865 status = nfs4_opendata_access(cred, opendata, state, fmode);
1867 goto err_opendata_put;
1869 if (opendata->o_arg.open_flags & O_EXCL) {
1870 nfs4_exclusive_attrset(opendata, sattr);
1872 nfs_fattr_init(opendata->o_res.f_attr);
1873 status = nfs4_do_setattr(state->inode, cred,
1874 opendata->o_res.f_attr, sattr,
1877 nfs_setattr_update_inode(state->inode, sattr);
1878 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1881 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1882 *ctx_th = opendata->f_attr.mdsthreshold;
1884 kfree(opendata->f_attr.mdsthreshold);
1885 opendata->f_attr.mdsthreshold = NULL;
1887 nfs4_opendata_put(opendata);
1888 nfs4_put_state_owner(sp);
1892 kfree(opendata->f_attr.mdsthreshold);
1893 nfs4_opendata_put(opendata);
1894 err_put_state_owner:
1895 nfs4_put_state_owner(sp);
1902 static struct nfs4_state *nfs4_do_open(struct inode *dir,
1903 struct dentry *dentry,
1906 struct iattr *sattr,
1907 struct rpc_cred *cred,
1908 struct nfs4_threshold **ctx_th)
1910 struct nfs4_exception exception = { };
1911 struct nfs4_state *res;
1914 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1916 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1920 /* NOTE: BAD_SEQID means the server and client disagree about the
1921 * book-keeping w.r.t. state-changing operations
1922 * (OPEN/CLOSE/LOCK/LOCKU...)
1923 * It is actually a sign of a bug on the client or on the server.
1925 * If we receive a BAD_SEQID error in the particular case of
1926 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1927 * have unhashed the old state_owner for us, and that we can
1928 * therefore safely retry using a new one. We should still warn
1929 * the user though...
1931 if (status == -NFS4ERR_BAD_SEQID) {
1932 pr_warn_ratelimited("NFS: v4 server %s "
1933 " returned a bad sequence-id error!\n",
1934 NFS_SERVER(dir)->nfs_client->cl_hostname);
1935 exception.retry = 1;
1939 * BAD_STATEID on OPEN means that the server cancelled our
1940 * state before it received the OPEN_CONFIRM.
1941 * Recover by retrying the request as per the discussion
1942 * on Page 181 of RFC3530.
1944 if (status == -NFS4ERR_BAD_STATEID) {
1945 exception.retry = 1;
1948 if (status == -EAGAIN) {
1949 /* We must have found a delegation */
1950 exception.retry = 1;
1953 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1954 status, &exception));
1955 } while (exception.retry);
1959 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1960 struct nfs_fattr *fattr, struct iattr *sattr,
1961 struct nfs4_state *state)
1963 struct nfs_server *server = NFS_SERVER(inode);
1964 struct nfs_setattrargs arg = {
1965 .fh = NFS_FH(inode),
1968 .bitmask = server->attr_bitmask,
1970 struct nfs_setattrres res = {
1974 struct rpc_message msg = {
1975 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1980 unsigned long timestamp = jiffies;
1983 nfs_fattr_init(fattr);
1985 if (state != NULL) {
1986 struct nfs_lockowner lockowner = {
1987 .l_owner = current->files,
1988 .l_pid = current->tgid,
1990 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
1992 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
1994 /* Use that stateid */
1996 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1998 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1999 if (status == 0 && state != NULL)
2000 renew_lease(server, timestamp);
2004 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2005 struct nfs_fattr *fattr, struct iattr *sattr,
2006 struct nfs4_state *state)
2008 struct nfs_server *server = NFS_SERVER(inode);
2009 struct nfs4_exception exception = {
2015 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2017 case -NFS4ERR_OPENMODE:
2018 if (state && !(state->state & FMODE_WRITE)) {
2020 if (sattr->ia_valid & ATTR_OPEN)
2025 err = nfs4_handle_exception(server, err, &exception);
2026 } while (exception.retry);
2031 struct nfs4_closedata {
2032 struct inode *inode;
2033 struct nfs4_state *state;
2034 struct nfs_closeargs arg;
2035 struct nfs_closeres res;
2036 struct nfs_fattr fattr;
2037 unsigned long timestamp;
2042 static void nfs4_free_closedata(void *data)
2044 struct nfs4_closedata *calldata = data;
2045 struct nfs4_state_owner *sp = calldata->state->owner;
2046 struct super_block *sb = calldata->state->inode->i_sb;
2049 pnfs_roc_release(calldata->state->inode);
2050 nfs4_put_open_state(calldata->state);
2051 nfs_free_seqid(calldata->arg.seqid);
2052 nfs4_put_state_owner(sp);
2053 nfs_sb_deactive_async(sb);
2057 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2060 spin_lock(&state->owner->so_lock);
2061 if (!(fmode & FMODE_READ))
2062 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2063 if (!(fmode & FMODE_WRITE))
2064 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2065 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2066 spin_unlock(&state->owner->so_lock);
2069 static void nfs4_close_done(struct rpc_task *task, void *data)
2071 struct nfs4_closedata *calldata = data;
2072 struct nfs4_state *state = calldata->state;
2073 struct nfs_server *server = NFS_SERVER(calldata->inode);
2075 dprintk("%s: begin!\n", __func__);
2076 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2078 /* hmm. we are done with the inode, and in the process of freeing
2079 * the state_owner. we keep this around to process errors
2081 switch (task->tk_status) {
2084 pnfs_roc_set_barrier(state->inode,
2085 calldata->roc_barrier);
2086 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2087 renew_lease(server, calldata->timestamp);
2088 nfs4_close_clear_stateid_flags(state,
2089 calldata->arg.fmode);
2091 case -NFS4ERR_STALE_STATEID:
2092 case -NFS4ERR_OLD_STATEID:
2093 case -NFS4ERR_BAD_STATEID:
2094 case -NFS4ERR_EXPIRED:
2095 if (calldata->arg.fmode == 0)
2098 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2099 rpc_restart_call_prepare(task);
2101 nfs_release_seqid(calldata->arg.seqid);
2102 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2103 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2106 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2108 struct nfs4_closedata *calldata = data;
2109 struct nfs4_state *state = calldata->state;
2110 struct inode *inode = calldata->inode;
2113 dprintk("%s: begin!\n", __func__);
2114 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2117 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2118 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2119 spin_lock(&state->owner->so_lock);
2120 /* Calculate the change in open mode */
2121 if (state->n_rdwr == 0) {
2122 if (state->n_rdonly == 0) {
2123 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2124 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2125 calldata->arg.fmode &= ~FMODE_READ;
2127 if (state->n_wronly == 0) {
2128 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2129 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2130 calldata->arg.fmode &= ~FMODE_WRITE;
2133 spin_unlock(&state->owner->so_lock);
2136 /* Note: exit _without_ calling nfs4_close_done */
2137 task->tk_action = NULL;
2141 if (calldata->arg.fmode == 0) {
2142 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2143 if (calldata->roc &&
2144 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
2148 nfs_fattr_init(calldata->res.fattr);
2149 calldata->timestamp = jiffies;
2150 if (nfs4_setup_sequence(NFS_SERVER(inode),
2151 &calldata->arg.seq_args,
2152 &calldata->res.seq_res,
2154 nfs_release_seqid(calldata->arg.seqid);
2156 dprintk("%s: done!\n", __func__);
2159 static const struct rpc_call_ops nfs4_close_ops = {
2160 .rpc_call_prepare = nfs4_close_prepare,
2161 .rpc_call_done = nfs4_close_done,
2162 .rpc_release = nfs4_free_closedata,
2166 * It is possible for data to be read/written from a mem-mapped file
2167 * after the sys_close call (which hits the vfs layer as a flush).
2168 * This means that we can't safely call nfsv4 close on a file until
2169 * the inode is cleared. This in turn means that we are not good
2170 * NFSv4 citizens - we do not indicate to the server to update the file's
2171 * share state even when we are done with one of the three share
2172 * stateid's in the inode.
2174 * NOTE: Caller must be holding the sp->so_owner semaphore!
2176 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2178 struct nfs_server *server = NFS_SERVER(state->inode);
2179 struct nfs4_closedata *calldata;
2180 struct nfs4_state_owner *sp = state->owner;
2181 struct rpc_task *task;
2182 struct rpc_message msg = {
2183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2184 .rpc_cred = state->owner->so_cred,
2186 struct rpc_task_setup task_setup_data = {
2187 .rpc_client = server->client,
2188 .rpc_message = &msg,
2189 .callback_ops = &nfs4_close_ops,
2190 .workqueue = nfsiod_workqueue,
2191 .flags = RPC_TASK_ASYNC,
2193 int status = -ENOMEM;
2195 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2196 if (calldata == NULL)
2198 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2199 calldata->inode = state->inode;
2200 calldata->state = state;
2201 calldata->arg.fh = NFS_FH(state->inode);
2202 calldata->arg.stateid = &state->open_stateid;
2203 /* Serialization for the sequence id */
2204 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2205 if (calldata->arg.seqid == NULL)
2206 goto out_free_calldata;
2207 calldata->arg.fmode = 0;
2208 calldata->arg.bitmask = server->cache_consistency_bitmask;
2209 calldata->res.fattr = &calldata->fattr;
2210 calldata->res.seqid = calldata->arg.seqid;
2211 calldata->res.server = server;
2212 calldata->roc = pnfs_roc(state->inode);
2213 nfs_sb_active(calldata->inode->i_sb);
2215 msg.rpc_argp = &calldata->arg;
2216 msg.rpc_resp = &calldata->res;
2217 task_setup_data.callback_data = calldata;
2218 task = rpc_run_task(&task_setup_data);
2220 return PTR_ERR(task);
2223 status = rpc_wait_for_completion_task(task);
2229 nfs4_put_open_state(state);
2230 nfs4_put_state_owner(sp);
2234 static struct inode *
2235 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2237 struct nfs4_state *state;
2239 /* Protect against concurrent sillydeletes */
2240 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2241 ctx->cred, &ctx->mdsthreshold);
2243 return ERR_CAST(state);
2245 return igrab(state->inode);
2248 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2250 if (ctx->state == NULL)
2253 nfs4_close_sync(ctx->state, ctx->mode);
2255 nfs4_close_state(ctx->state, ctx->mode);
2258 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2260 struct nfs4_server_caps_arg args = {
2263 struct nfs4_server_caps_res res = {};
2264 struct rpc_message msg = {
2265 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2271 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2273 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2274 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2275 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2276 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2277 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2278 NFS_CAP_CTIME|NFS_CAP_MTIME);
2279 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2280 server->caps |= NFS_CAP_ACLS;
2281 if (res.has_links != 0)
2282 server->caps |= NFS_CAP_HARDLINKS;
2283 if (res.has_symlinks != 0)
2284 server->caps |= NFS_CAP_SYMLINKS;
2285 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2286 server->caps |= NFS_CAP_FILEID;
2287 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2288 server->caps |= NFS_CAP_MODE;
2289 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2290 server->caps |= NFS_CAP_NLINK;
2291 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2292 server->caps |= NFS_CAP_OWNER;
2293 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2294 server->caps |= NFS_CAP_OWNER_GROUP;
2295 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2296 server->caps |= NFS_CAP_ATIME;
2297 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2298 server->caps |= NFS_CAP_CTIME;
2299 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2300 server->caps |= NFS_CAP_MTIME;
2302 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2303 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2304 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2305 server->acl_bitmask = res.acl_bitmask;
2306 server->fh_expire_type = res.fh_expire_type;
2312 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2314 struct nfs4_exception exception = { };
2317 err = nfs4_handle_exception(server,
2318 _nfs4_server_capabilities(server, fhandle),
2320 } while (exception.retry);
2324 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2325 struct nfs_fsinfo *info)
2327 struct nfs4_lookup_root_arg args = {
2328 .bitmask = nfs4_fattr_bitmap,
2330 struct nfs4_lookup_res res = {
2332 .fattr = info->fattr,
2335 struct rpc_message msg = {
2336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2341 nfs_fattr_init(info->fattr);
2342 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2345 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2346 struct nfs_fsinfo *info)
2348 struct nfs4_exception exception = { };
2351 err = _nfs4_lookup_root(server, fhandle, info);
2354 case -NFS4ERR_WRONGSEC:
2357 err = nfs4_handle_exception(server, err, &exception);
2359 } while (exception.retry);
2364 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2365 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2367 struct rpc_auth *auth;
2370 auth = rpcauth_create(flavor, server->client);
2375 ret = nfs4_lookup_root(server, fhandle, info);
2380 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2381 struct nfs_fsinfo *info)
2383 int i, len, status = 0;
2384 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2386 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2390 for (i = 0; i < len; i++) {
2391 /* AUTH_UNIX is the default flavor if none was specified,
2392 * thus has already been tried. */
2393 if (flav_array[i] == RPC_AUTH_UNIX)
2396 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2397 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2402 * -EACCESS could mean that the user doesn't have correct permissions
2403 * to access the mount. It could also mean that we tried to mount
2404 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2405 * existing mount programs don't handle -EACCES very well so it should
2406 * be mapped to -EPERM instead.
2408 if (status == -EACCES)
2414 * get the file handle for the "/" directory on the server
2416 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2417 struct nfs_fsinfo *info)
2419 int minor_version = server->nfs_client->cl_minorversion;
2420 int status = nfs4_lookup_root(server, fhandle, info);
2421 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2423 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2424 * by nfs4_map_errors() as this function exits.
2426 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2428 status = nfs4_server_capabilities(server, fhandle);
2430 status = nfs4_do_fsinfo(server, fhandle, info);
2431 return nfs4_map_errors(status);
2434 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2435 struct nfs_fsinfo *info)
2438 struct nfs_fattr *fattr = info->fattr;
2440 error = nfs4_server_capabilities(server, mntfh);
2442 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2446 error = nfs4_proc_getattr(server, mntfh, fattr);
2448 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2452 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2453 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2454 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2460 * Get locations and (maybe) other attributes of a referral.
2461 * Note that we'll actually follow the referral later when
2462 * we detect fsid mismatch in inode revalidation
2464 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2465 const struct qstr *name, struct nfs_fattr *fattr,
2466 struct nfs_fh *fhandle)
2468 int status = -ENOMEM;
2469 struct page *page = NULL;
2470 struct nfs4_fs_locations *locations = NULL;
2472 page = alloc_page(GFP_KERNEL);
2475 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2476 if (locations == NULL)
2479 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2482 /* Make sure server returned a different fsid for the referral */
2483 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2484 dprintk("%s: server did not return a different fsid for"
2485 " a referral at %s\n", __func__, name->name);
2489 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2490 nfs_fixup_referral_attributes(&locations->fattr);
2492 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2493 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2494 memset(fhandle, 0, sizeof(struct nfs_fh));
2502 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2504 struct nfs4_getattr_arg args = {
2506 .bitmask = server->attr_bitmask,
2508 struct nfs4_getattr_res res = {
2512 struct rpc_message msg = {
2513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2518 nfs_fattr_init(fattr);
2519 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2522 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2524 struct nfs4_exception exception = { };
2527 err = nfs4_handle_exception(server,
2528 _nfs4_proc_getattr(server, fhandle, fattr),
2530 } while (exception.retry);
2535 * The file is not closed if it is opened due to the a request to change
2536 * the size of the file. The open call will not be needed once the
2537 * VFS layer lookup-intents are implemented.
2539 * Close is called when the inode is destroyed.
2540 * If we haven't opened the file for O_WRONLY, we
2541 * need to in the size_change case to obtain a stateid.
2544 * Because OPEN is always done by name in nfsv4, it is
2545 * possible that we opened a different file by the same
2546 * name. We can recognize this race condition, but we
2547 * can't do anything about it besides returning an error.
2549 * This will be fixed with VFS changes (lookup-intent).
2552 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2553 struct iattr *sattr)
2555 struct inode *inode = dentry->d_inode;
2556 struct rpc_cred *cred = NULL;
2557 struct nfs4_state *state = NULL;
2560 if (pnfs_ld_layoutret_on_setattr(inode))
2561 pnfs_return_layout(inode);
2563 nfs_fattr_init(fattr);
2565 /* Deal with open(O_TRUNC) */
2566 if (sattr->ia_valid & ATTR_OPEN)
2567 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2569 /* Optimization: if the end result is no change, don't RPC */
2570 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2573 /* Search for an existing open(O_WRITE) file */
2574 if (sattr->ia_valid & ATTR_FILE) {
2575 struct nfs_open_context *ctx;
2577 ctx = nfs_file_open_context(sattr->ia_file);
2584 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2586 nfs_setattr_update_inode(inode, sattr);
2590 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2591 const struct qstr *name, struct nfs_fh *fhandle,
2592 struct nfs_fattr *fattr)
2594 struct nfs_server *server = NFS_SERVER(dir);
2596 struct nfs4_lookup_arg args = {
2597 .bitmask = server->attr_bitmask,
2598 .dir_fh = NFS_FH(dir),
2601 struct nfs4_lookup_res res = {
2606 struct rpc_message msg = {
2607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2612 nfs_fattr_init(fattr);
2614 dprintk("NFS call lookup %s\n", name->name);
2615 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2616 dprintk("NFS reply lookup: %d\n", status);
2620 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2622 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2623 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2624 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2628 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2629 struct qstr *name, struct nfs_fh *fhandle,
2630 struct nfs_fattr *fattr)
2632 struct nfs4_exception exception = { };
2633 struct rpc_clnt *client = *clnt;
2636 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2638 case -NFS4ERR_BADNAME:
2641 case -NFS4ERR_MOVED:
2642 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2644 case -NFS4ERR_WRONGSEC:
2646 if (client != *clnt)
2649 client = nfs4_create_sec_client(client, dir, name);
2651 return PTR_ERR(client);
2653 exception.retry = 1;
2656 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2658 } while (exception.retry);
2663 else if (client != *clnt)
2664 rpc_shutdown_client(client);
2669 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2670 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2673 struct rpc_clnt *client = NFS_CLIENT(dir);
2675 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2676 if (client != NFS_CLIENT(dir)) {
2677 rpc_shutdown_client(client);
2678 nfs_fixup_secinfo_attributes(fattr);
2684 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2685 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2688 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2690 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2692 rpc_shutdown_client(client);
2693 return ERR_PTR(status);
2698 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2700 struct nfs_server *server = NFS_SERVER(inode);
2701 struct nfs4_accessargs args = {
2702 .fh = NFS_FH(inode),
2703 .bitmask = server->cache_consistency_bitmask,
2705 struct nfs4_accessres res = {
2708 struct rpc_message msg = {
2709 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2712 .rpc_cred = entry->cred,
2714 int mode = entry->mask;
2718 * Determine which access bits we want to ask for...
2720 if (mode & MAY_READ)
2721 args.access |= NFS4_ACCESS_READ;
2722 if (S_ISDIR(inode->i_mode)) {
2723 if (mode & MAY_WRITE)
2724 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2725 if (mode & MAY_EXEC)
2726 args.access |= NFS4_ACCESS_LOOKUP;
2728 if (mode & MAY_WRITE)
2729 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2730 if (mode & MAY_EXEC)
2731 args.access |= NFS4_ACCESS_EXECUTE;
2734 res.fattr = nfs_alloc_fattr();
2735 if (res.fattr == NULL)
2738 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2740 nfs_access_set_mask(entry, res.access);
2741 nfs_refresh_inode(inode, res.fattr);
2743 nfs_free_fattr(res.fattr);
2747 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2749 struct nfs4_exception exception = { };
2752 err = nfs4_handle_exception(NFS_SERVER(inode),
2753 _nfs4_proc_access(inode, entry),
2755 } while (exception.retry);
2760 * TODO: For the time being, we don't try to get any attributes
2761 * along with any of the zero-copy operations READ, READDIR,
2764 * In the case of the first three, we want to put the GETATTR
2765 * after the read-type operation -- this is because it is hard
2766 * to predict the length of a GETATTR response in v4, and thus
2767 * align the READ data correctly. This means that the GETATTR
2768 * may end up partially falling into the page cache, and we should
2769 * shift it into the 'tail' of the xdr_buf before processing.
2770 * To do this efficiently, we need to know the total length
2771 * of data received, which doesn't seem to be available outside
2774 * In the case of WRITE, we also want to put the GETATTR after
2775 * the operation -- in this case because we want to make sure
2776 * we get the post-operation mtime and size.
2778 * Both of these changes to the XDR layer would in fact be quite
2779 * minor, but I decided to leave them for a subsequent patch.
2781 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2782 unsigned int pgbase, unsigned int pglen)
2784 struct nfs4_readlink args = {
2785 .fh = NFS_FH(inode),
2790 struct nfs4_readlink_res res;
2791 struct rpc_message msg = {
2792 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2797 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2800 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2801 unsigned int pgbase, unsigned int pglen)
2803 struct nfs4_exception exception = { };
2806 err = nfs4_handle_exception(NFS_SERVER(inode),
2807 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2809 } while (exception.retry);
2814 * This is just for mknod. open(O_CREAT) will always do ->open_context().
2817 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2820 struct nfs_open_context *ctx;
2821 struct nfs4_state *state;
2824 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2826 return PTR_ERR(ctx);
2828 sattr->ia_mode &= ~current_umask();
2829 state = nfs4_do_open(dir, dentry, ctx->mode,
2830 flags, sattr, ctx->cred,
2831 &ctx->mdsthreshold);
2833 if (IS_ERR(state)) {
2834 status = PTR_ERR(state);
2837 d_add(dentry, igrab(state->inode));
2838 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2841 put_nfs_open_context(ctx);
2845 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2847 struct nfs_server *server = NFS_SERVER(dir);
2848 struct nfs_removeargs args = {
2852 struct nfs_removeres res = {
2855 struct rpc_message msg = {
2856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2862 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2864 update_changeattr(dir, &res.cinfo);
2868 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2870 struct nfs4_exception exception = { };
2873 err = nfs4_handle_exception(NFS_SERVER(dir),
2874 _nfs4_proc_remove(dir, name),
2876 } while (exception.retry);
2880 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2882 struct nfs_server *server = NFS_SERVER(dir);
2883 struct nfs_removeargs *args = msg->rpc_argp;
2884 struct nfs_removeres *res = msg->rpc_resp;
2886 res->server = server;
2887 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2888 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2891 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2893 nfs4_setup_sequence(NFS_SERVER(data->dir),
2894 &data->args.seq_args,
2899 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2901 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2903 if (!nfs4_sequence_done(task, &res->seq_res))
2905 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2907 update_changeattr(dir, &res->cinfo);
2911 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2913 struct nfs_server *server = NFS_SERVER(dir);
2914 struct nfs_renameargs *arg = msg->rpc_argp;
2915 struct nfs_renameres *res = msg->rpc_resp;
2917 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2918 res->server = server;
2919 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2922 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2924 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2925 &data->args.seq_args,
2930 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2931 struct inode *new_dir)
2933 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2935 if (!nfs4_sequence_done(task, &res->seq_res))
2937 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2940 update_changeattr(old_dir, &res->old_cinfo);
2941 update_changeattr(new_dir, &res->new_cinfo);
2945 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2946 struct inode *new_dir, struct qstr *new_name)
2948 struct nfs_server *server = NFS_SERVER(old_dir);
2949 struct nfs_renameargs arg = {
2950 .old_dir = NFS_FH(old_dir),
2951 .new_dir = NFS_FH(new_dir),
2952 .old_name = old_name,
2953 .new_name = new_name,
2955 struct nfs_renameres res = {
2958 struct rpc_message msg = {
2959 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2963 int status = -ENOMEM;
2965 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2967 update_changeattr(old_dir, &res.old_cinfo);
2968 update_changeattr(new_dir, &res.new_cinfo);
2973 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2974 struct inode *new_dir, struct qstr *new_name)
2976 struct nfs4_exception exception = { };
2979 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2980 _nfs4_proc_rename(old_dir, old_name,
2983 } while (exception.retry);
2987 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2989 struct nfs_server *server = NFS_SERVER(inode);
2990 struct nfs4_link_arg arg = {
2991 .fh = NFS_FH(inode),
2992 .dir_fh = NFS_FH(dir),
2994 .bitmask = server->attr_bitmask,
2996 struct nfs4_link_res res = {
2999 struct rpc_message msg = {
3000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3004 int status = -ENOMEM;
3006 res.fattr = nfs_alloc_fattr();
3007 if (res.fattr == NULL)
3010 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3012 update_changeattr(dir, &res.cinfo);
3013 nfs_post_op_update_inode(inode, res.fattr);
3016 nfs_free_fattr(res.fattr);
3020 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3022 struct nfs4_exception exception = { };
3025 err = nfs4_handle_exception(NFS_SERVER(inode),
3026 _nfs4_proc_link(inode, dir, name),
3028 } while (exception.retry);
3032 struct nfs4_createdata {
3033 struct rpc_message msg;
3034 struct nfs4_create_arg arg;
3035 struct nfs4_create_res res;
3037 struct nfs_fattr fattr;
3040 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3041 struct qstr *name, struct iattr *sattr, u32 ftype)
3043 struct nfs4_createdata *data;
3045 data = kzalloc(sizeof(*data), GFP_KERNEL);
3047 struct nfs_server *server = NFS_SERVER(dir);
3049 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3050 data->msg.rpc_argp = &data->arg;
3051 data->msg.rpc_resp = &data->res;
3052 data->arg.dir_fh = NFS_FH(dir);
3053 data->arg.server = server;
3054 data->arg.name = name;
3055 data->arg.attrs = sattr;
3056 data->arg.ftype = ftype;
3057 data->arg.bitmask = server->attr_bitmask;
3058 data->res.server = server;
3059 data->res.fh = &data->fh;
3060 data->res.fattr = &data->fattr;
3061 nfs_fattr_init(data->res.fattr);
3066 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3068 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3069 &data->arg.seq_args, &data->res.seq_res, 1);
3071 update_changeattr(dir, &data->res.dir_cinfo);
3072 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3077 static void nfs4_free_createdata(struct nfs4_createdata *data)
3082 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3083 struct page *page, unsigned int len, struct iattr *sattr)
3085 struct nfs4_createdata *data;
3086 int status = -ENAMETOOLONG;
3088 if (len > NFS4_MAXPATHLEN)
3092 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3096 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3097 data->arg.u.symlink.pages = &page;
3098 data->arg.u.symlink.len = len;
3100 status = nfs4_do_create(dir, dentry, data);
3102 nfs4_free_createdata(data);
3107 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3108 struct page *page, unsigned int len, struct iattr *sattr)
3110 struct nfs4_exception exception = { };
3113 err = nfs4_handle_exception(NFS_SERVER(dir),
3114 _nfs4_proc_symlink(dir, dentry, page,
3117 } while (exception.retry);
3121 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3122 struct iattr *sattr)
3124 struct nfs4_createdata *data;
3125 int status = -ENOMEM;
3127 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3131 status = nfs4_do_create(dir, dentry, data);
3133 nfs4_free_createdata(data);
3138 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3139 struct iattr *sattr)
3141 struct nfs4_exception exception = { };
3144 sattr->ia_mode &= ~current_umask();
3146 err = nfs4_handle_exception(NFS_SERVER(dir),
3147 _nfs4_proc_mkdir(dir, dentry, sattr),
3149 } while (exception.retry);
3153 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3154 u64 cookie, struct page **pages, unsigned int count, int plus)
3156 struct inode *dir = dentry->d_inode;
3157 struct nfs4_readdir_arg args = {
3162 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3165 struct nfs4_readdir_res res;
3166 struct rpc_message msg = {
3167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3174 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3175 dentry->d_parent->d_name.name,
3176 dentry->d_name.name,
3177 (unsigned long long)cookie);
3178 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3179 res.pgbase = args.pgbase;
3180 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3182 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3183 status += args.pgbase;
3186 nfs_invalidate_atime(dir);
3188 dprintk("%s: returns %d\n", __func__, status);
3192 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3193 u64 cookie, struct page **pages, unsigned int count, int plus)
3195 struct nfs4_exception exception = { };
3198 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3199 _nfs4_proc_readdir(dentry, cred, cookie,
3200 pages, count, plus),
3202 } while (exception.retry);
3206 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3207 struct iattr *sattr, dev_t rdev)
3209 struct nfs4_createdata *data;
3210 int mode = sattr->ia_mode;
3211 int status = -ENOMEM;
3213 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3218 data->arg.ftype = NF4FIFO;
3219 else if (S_ISBLK(mode)) {
3220 data->arg.ftype = NF4BLK;
3221 data->arg.u.device.specdata1 = MAJOR(rdev);
3222 data->arg.u.device.specdata2 = MINOR(rdev);
3224 else if (S_ISCHR(mode)) {
3225 data->arg.ftype = NF4CHR;
3226 data->arg.u.device.specdata1 = MAJOR(rdev);
3227 data->arg.u.device.specdata2 = MINOR(rdev);
3228 } else if (!S_ISSOCK(mode)) {
3233 status = nfs4_do_create(dir, dentry, data);
3235 nfs4_free_createdata(data);
3240 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3241 struct iattr *sattr, dev_t rdev)
3243 struct nfs4_exception exception = { };
3246 sattr->ia_mode &= ~current_umask();
3248 err = nfs4_handle_exception(NFS_SERVER(dir),
3249 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3251 } while (exception.retry);
3255 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3256 struct nfs_fsstat *fsstat)
3258 struct nfs4_statfs_arg args = {
3260 .bitmask = server->attr_bitmask,
3262 struct nfs4_statfs_res res = {
3265 struct rpc_message msg = {
3266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3271 nfs_fattr_init(fsstat->fattr);
3272 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3275 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3277 struct nfs4_exception exception = { };
3280 err = nfs4_handle_exception(server,
3281 _nfs4_proc_statfs(server, fhandle, fsstat),
3283 } while (exception.retry);
3287 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3288 struct nfs_fsinfo *fsinfo)
3290 struct nfs4_fsinfo_arg args = {
3292 .bitmask = server->attr_bitmask,
3294 struct nfs4_fsinfo_res res = {
3297 struct rpc_message msg = {
3298 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3303 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3306 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3308 struct nfs4_exception exception = { };
3312 err = nfs4_handle_exception(server,
3313 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3315 } while (exception.retry);
3319 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3323 nfs_fattr_init(fsinfo->fattr);
3324 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3326 /* block layout checks this! */
3327 server->pnfs_blksize = fsinfo->blksize;
3328 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3334 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3335 struct nfs_pathconf *pathconf)
3337 struct nfs4_pathconf_arg args = {
3339 .bitmask = server->attr_bitmask,
3341 struct nfs4_pathconf_res res = {
3342 .pathconf = pathconf,
3344 struct rpc_message msg = {
3345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3350 /* None of the pathconf attributes are mandatory to implement */
3351 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3352 memset(pathconf, 0, sizeof(*pathconf));
3356 nfs_fattr_init(pathconf->fattr);
3357 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3360 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3361 struct nfs_pathconf *pathconf)
3363 struct nfs4_exception exception = { };
3367 err = nfs4_handle_exception(server,
3368 _nfs4_proc_pathconf(server, fhandle, pathconf),
3370 } while (exception.retry);
3374 void __nfs4_read_done_cb(struct nfs_read_data *data)
3376 nfs_invalidate_atime(data->header->inode);
3379 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3381 struct nfs_server *server = NFS_SERVER(data->header->inode);
3383 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3384 rpc_restart_call_prepare(task);
3388 __nfs4_read_done_cb(data);
3389 if (task->tk_status > 0)
3390 renew_lease(server, data->timestamp);
3394 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3397 dprintk("--> %s\n", __func__);
3399 if (!nfs4_sequence_done(task, &data->res.seq_res))
3402 return data->read_done_cb ? data->read_done_cb(task, data) :
3403 nfs4_read_done_cb(task, data);
3406 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3408 data->timestamp = jiffies;
3409 data->read_done_cb = nfs4_read_done_cb;
3410 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3411 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3414 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3416 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3417 &data->args.seq_args,
3422 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3424 struct inode *inode = data->header->inode;
3426 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3427 rpc_restart_call_prepare(task);
3430 if (task->tk_status >= 0) {
3431 renew_lease(NFS_SERVER(inode), data->timestamp);
3432 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3437 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3439 if (!nfs4_sequence_done(task, &data->res.seq_res))
3441 return data->write_done_cb ? data->write_done_cb(task, data) :
3442 nfs4_write_done_cb(task, data);
3446 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3448 const struct nfs_pgio_header *hdr = data->header;
3450 /* Don't request attributes for pNFS or O_DIRECT writes */
3451 if (data->ds_clp != NULL || hdr->dreq != NULL)
3453 /* Otherwise, request attributes if and only if we don't hold
3456 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3459 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3461 struct nfs_server *server = NFS_SERVER(data->header->inode);
3463 if (!nfs4_write_need_cache_consistency_data(data)) {
3464 data->args.bitmask = NULL;
3465 data->res.fattr = NULL;
3467 data->args.bitmask = server->cache_consistency_bitmask;
3469 if (!data->write_done_cb)
3470 data->write_done_cb = nfs4_write_done_cb;
3471 data->res.server = server;
3472 data->timestamp = jiffies;
3474 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3475 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3478 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3480 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3481 &data->args.seq_args,
3486 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3488 nfs4_setup_sequence(NFS_SERVER(data->inode),
3489 &data->args.seq_args,
3494 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3496 struct inode *inode = data->inode;
3498 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3499 rpc_restart_call_prepare(task);
3505 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3507 if (!nfs4_sequence_done(task, &data->res.seq_res))
3509 return data->commit_done_cb(task, data);
3512 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3514 struct nfs_server *server = NFS_SERVER(data->inode);
3516 if (data->commit_done_cb == NULL)
3517 data->commit_done_cb = nfs4_commit_done_cb;
3518 data->res.server = server;
3519 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3520 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3523 struct nfs4_renewdata {
3524 struct nfs_client *client;
3525 unsigned long timestamp;
3529 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3530 * standalone procedure for queueing an asynchronous RENEW.
3532 static void nfs4_renew_release(void *calldata)
3534 struct nfs4_renewdata *data = calldata;
3535 struct nfs_client *clp = data->client;
3537 if (atomic_read(&clp->cl_count) > 1)
3538 nfs4_schedule_state_renewal(clp);
3539 nfs_put_client(clp);
3543 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3545 struct nfs4_renewdata *data = calldata;
3546 struct nfs_client *clp = data->client;
3547 unsigned long timestamp = data->timestamp;
3549 if (task->tk_status < 0) {
3550 /* Unless we're shutting down, schedule state recovery! */
3551 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3553 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3554 nfs4_schedule_lease_recovery(clp);
3557 nfs4_schedule_path_down_recovery(clp);
3559 do_renew_lease(clp, timestamp);
3562 static const struct rpc_call_ops nfs4_renew_ops = {
3563 .rpc_call_done = nfs4_renew_done,
3564 .rpc_release = nfs4_renew_release,
3567 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3569 struct rpc_message msg = {
3570 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3574 struct nfs4_renewdata *data;
3576 if (renew_flags == 0)
3578 if (!atomic_inc_not_zero(&clp->cl_count))
3580 data = kmalloc(sizeof(*data), GFP_NOFS);
3584 data->timestamp = jiffies;
3585 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3586 &nfs4_renew_ops, data);
3589 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3591 struct rpc_message msg = {
3592 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3596 unsigned long now = jiffies;
3599 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3602 do_renew_lease(clp, now);
3606 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3608 return (server->caps & NFS_CAP_ACLS)
3609 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3610 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3613 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3614 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3617 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3619 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3620 struct page **pages, unsigned int *pgbase)
3622 struct page *newpage, **spages;
3628 len = min_t(size_t, PAGE_SIZE, buflen);
3629 newpage = alloc_page(GFP_KERNEL);
3631 if (newpage == NULL)
3633 memcpy(page_address(newpage), buf, len);
3638 } while (buflen != 0);
3644 __free_page(spages[rc-1]);
3648 struct nfs4_cached_acl {
3654 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3656 struct nfs_inode *nfsi = NFS_I(inode);
3658 spin_lock(&inode->i_lock);
3659 kfree(nfsi->nfs4_acl);
3660 nfsi->nfs4_acl = acl;
3661 spin_unlock(&inode->i_lock);
3664 static void nfs4_zap_acl_attr(struct inode *inode)
3666 nfs4_set_cached_acl(inode, NULL);
3669 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3671 struct nfs_inode *nfsi = NFS_I(inode);
3672 struct nfs4_cached_acl *acl;
3675 spin_lock(&inode->i_lock);
3676 acl = nfsi->nfs4_acl;
3679 if (buf == NULL) /* user is just asking for length */
3681 if (acl->cached == 0)
3683 ret = -ERANGE; /* see getxattr(2) man page */
3684 if (acl->len > buflen)
3686 memcpy(buf, acl->data, acl->len);
3690 spin_unlock(&inode->i_lock);
3694 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3696 struct nfs4_cached_acl *acl;
3697 size_t buflen = sizeof(*acl) + acl_len;
3699 if (buflen <= PAGE_SIZE) {
3700 acl = kmalloc(buflen, GFP_KERNEL);
3704 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3706 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3713 nfs4_set_cached_acl(inode, acl);
3717 * The getxattr API returns the required buffer length when called with a
3718 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3719 * the required buf. On a NULL buf, we send a page of data to the server
3720 * guessing that the ACL request can be serviced by a page. If so, we cache
3721 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3722 * the cache. If not so, we throw away the page, and cache the required
3723 * length. The next getxattr call will then produce another round trip to
3724 * the server, this time with the input buf of the required size.
3726 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3728 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3729 struct nfs_getaclargs args = {
3730 .fh = NFS_FH(inode),
3734 struct nfs_getaclres res = {
3737 struct rpc_message msg = {
3738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3742 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3743 int ret = -ENOMEM, i;
3745 /* As long as we're doing a round trip to the server anyway,
3746 * let's be prepared for a page of acl data. */
3749 if (npages > ARRAY_SIZE(pages))
3752 for (i = 0; i < npages; i++) {
3753 pages[i] = alloc_page(GFP_KERNEL);
3758 /* for decoding across pages */
3759 res.acl_scratch = alloc_page(GFP_KERNEL);
3760 if (!res.acl_scratch)
3763 args.acl_len = npages * PAGE_SIZE;
3764 args.acl_pgbase = 0;
3766 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3767 __func__, buf, buflen, npages, args.acl_len);
3768 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3769 &msg, &args.seq_args, &res.seq_res, 0);
3773 /* Handle the case where the passed-in buffer is too short */
3774 if (res.acl_flags & NFS4_ACL_TRUNC) {
3775 /* Did the user only issue a request for the acl length? */
3781 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3783 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3787 for (i = 0; i < npages; i++)
3789 __free_page(pages[i]);
3790 if (res.acl_scratch)
3791 __free_page(res.acl_scratch);
3795 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3797 struct nfs4_exception exception = { };
3800 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3803 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3804 } while (exception.retry);
3808 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3810 struct nfs_server *server = NFS_SERVER(inode);
3813 if (!nfs4_server_supports_acls(server))
3815 ret = nfs_revalidate_inode(server, inode);
3818 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3819 nfs_zap_acl_cache(inode);
3820 ret = nfs4_read_cached_acl(inode, buf, buflen);
3822 /* -ENOENT is returned if there is no ACL or if there is an ACL
3823 * but no cached acl data, just the acl length */
3825 return nfs4_get_acl_uncached(inode, buf, buflen);
3828 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3830 struct nfs_server *server = NFS_SERVER(inode);
3831 struct page *pages[NFS4ACL_MAXPAGES];
3832 struct nfs_setaclargs arg = {
3833 .fh = NFS_FH(inode),
3837 struct nfs_setaclres res;
3838 struct rpc_message msg = {
3839 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3843 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3846 if (!nfs4_server_supports_acls(server))
3848 if (npages > ARRAY_SIZE(pages))
3850 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3853 nfs4_inode_return_delegation(inode);
3854 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3857 * Free each page after tx, so the only ref left is
3858 * held by the network stack
3861 put_page(pages[i-1]);
3864 * Acl update can result in inode attribute update.
3865 * so mark the attribute cache invalid.
3867 spin_lock(&inode->i_lock);
3868 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3869 spin_unlock(&inode->i_lock);
3870 nfs_access_zap_cache(inode);
3871 nfs_zap_acl_cache(inode);
3875 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3877 struct nfs4_exception exception = { };
3880 err = nfs4_handle_exception(NFS_SERVER(inode),
3881 __nfs4_proc_set_acl(inode, buf, buflen),
3883 } while (exception.retry);
3888 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3890 struct nfs_client *clp = server->nfs_client;
3892 if (task->tk_status >= 0)
3894 switch(task->tk_status) {
3895 case -NFS4ERR_DELEG_REVOKED:
3896 case -NFS4ERR_ADMIN_REVOKED:
3897 case -NFS4ERR_BAD_STATEID:
3900 nfs_remove_bad_delegation(state->inode);
3901 case -NFS4ERR_OPENMODE:
3904 nfs4_schedule_stateid_recovery(server, state);
3905 goto wait_on_recovery;
3906 case -NFS4ERR_EXPIRED:
3908 nfs4_schedule_stateid_recovery(server, state);
3909 case -NFS4ERR_STALE_STATEID:
3910 case -NFS4ERR_STALE_CLIENTID:
3911 nfs4_schedule_lease_recovery(clp);
3912 goto wait_on_recovery;
3913 #if defined(CONFIG_NFS_V4_1)
3914 case -NFS4ERR_BADSESSION:
3915 case -NFS4ERR_BADSLOT:
3916 case -NFS4ERR_BAD_HIGH_SLOT:
3917 case -NFS4ERR_DEADSESSION:
3918 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3919 case -NFS4ERR_SEQ_FALSE_RETRY:
3920 case -NFS4ERR_SEQ_MISORDERED:
3921 dprintk("%s ERROR %d, Reset session\n", __func__,
3923 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
3924 task->tk_status = 0;
3926 #endif /* CONFIG_NFS_V4_1 */
3927 case -NFS4ERR_DELAY:
3928 nfs_inc_server_stats(server, NFSIOS_DELAY);
3929 case -NFS4ERR_GRACE:
3931 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3932 task->tk_status = 0;
3934 case -NFS4ERR_RETRY_UNCACHED_REP:
3935 case -NFS4ERR_OLD_STATEID:
3936 task->tk_status = 0;
3939 task->tk_status = nfs4_map_errors(task->tk_status);
3942 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3943 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3944 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3945 task->tk_status = 0;
3949 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3950 nfs4_verifier *bootverf)
3954 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
3955 /* An impossible timestamp guarantees this value
3956 * will never match a generated boot time. */
3958 verf[1] = (__be32)(NSEC_PER_SEC + 1);
3960 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
3961 verf[0] = (__be32)nn->boot_time.tv_sec;
3962 verf[1] = (__be32)nn->boot_time.tv_nsec;
3964 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3968 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
3969 char *buf, size_t len)
3971 unsigned int result;
3974 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
3976 rpc_peeraddr2str(clp->cl_rpcclient,
3978 rpc_peeraddr2str(clp->cl_rpcclient,
3979 RPC_DISPLAY_PROTO));
3985 nfs4_init_uniform_client_string(const struct nfs_client *clp,
3986 char *buf, size_t len)
3988 char *nodename = clp->cl_rpcclient->cl_nodename;
3990 if (nfs4_client_id_uniquifier[0] != '\0')
3991 nodename = nfs4_client_id_uniquifier;
3992 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
3993 clp->rpc_ops->version, clp->cl_minorversion,
3998 * nfs4_proc_setclientid - Negotiate client ID
3999 * @clp: state data structure
4000 * @program: RPC program for NFSv4 callback service
4001 * @port: IP port number for NFS4 callback service
4002 * @cred: RPC credential to use for this call
4003 * @res: where to place the result
4005 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4007 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4008 unsigned short port, struct rpc_cred *cred,
4009 struct nfs4_setclientid_res *res)
4011 nfs4_verifier sc_verifier;
4012 struct nfs4_setclientid setclientid = {
4013 .sc_verifier = &sc_verifier,
4015 .sc_cb_ident = clp->cl_cb_ident,
4017 struct rpc_message msg = {
4018 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4019 .rpc_argp = &setclientid,
4025 /* nfs_client_id4 */
4026 nfs4_init_boot_verifier(clp, &sc_verifier);
4027 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4028 setclientid.sc_name_len =
4029 nfs4_init_uniform_client_string(clp,
4030 setclientid.sc_name,
4031 sizeof(setclientid.sc_name));
4033 setclientid.sc_name_len =
4034 nfs4_init_nonuniform_client_string(clp,
4035 setclientid.sc_name,
4036 sizeof(setclientid.sc_name));
4039 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4040 sizeof(setclientid.sc_netid),
4041 rpc_peeraddr2str(clp->cl_rpcclient,
4042 RPC_DISPLAY_NETID));
4044 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4045 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4046 clp->cl_ipaddr, port >> 8, port & 255);
4048 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4049 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4050 setclientid.sc_name_len, setclientid.sc_name);
4051 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4052 dprintk("NFS reply setclientid: %d\n", status);
4057 * nfs4_proc_setclientid_confirm - Confirm client ID
4058 * @clp: state data structure
4059 * @res: result of a previous SETCLIENTID
4060 * @cred: RPC credential to use for this call
4062 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4064 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4065 struct nfs4_setclientid_res *arg,
4066 struct rpc_cred *cred)
4068 struct nfs_fsinfo fsinfo;
4069 struct rpc_message msg = {
4070 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4072 .rpc_resp = &fsinfo,
4078 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4079 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4082 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4084 spin_lock(&clp->cl_lock);
4085 clp->cl_lease_time = fsinfo.lease_time * HZ;
4086 clp->cl_last_renewal = now;
4087 spin_unlock(&clp->cl_lock);
4089 dprintk("NFS reply setclientid_confirm: %d\n", status);
4093 struct nfs4_delegreturndata {
4094 struct nfs4_delegreturnargs args;
4095 struct nfs4_delegreturnres res;
4097 nfs4_stateid stateid;
4098 unsigned long timestamp;
4099 struct nfs_fattr fattr;
4103 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4105 struct nfs4_delegreturndata *data = calldata;
4107 if (!nfs4_sequence_done(task, &data->res.seq_res))
4110 switch (task->tk_status) {
4111 case -NFS4ERR_STALE_STATEID:
4112 case -NFS4ERR_EXPIRED:
4114 renew_lease(data->res.server, data->timestamp);
4117 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4119 rpc_restart_call_prepare(task);
4123 data->rpc_status = task->tk_status;
4126 static void nfs4_delegreturn_release(void *calldata)
4131 #if defined(CONFIG_NFS_V4_1)
4132 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4134 struct nfs4_delegreturndata *d_data;
4136 d_data = (struct nfs4_delegreturndata *)data;
4138 nfs4_setup_sequence(d_data->res.server,
4139 &d_data->args.seq_args,
4140 &d_data->res.seq_res,
4143 #endif /* CONFIG_NFS_V4_1 */
4145 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4146 #if defined(CONFIG_NFS_V4_1)
4147 .rpc_call_prepare = nfs4_delegreturn_prepare,
4148 #endif /* CONFIG_NFS_V4_1 */
4149 .rpc_call_done = nfs4_delegreturn_done,
4150 .rpc_release = nfs4_delegreturn_release,
4153 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4155 struct nfs4_delegreturndata *data;
4156 struct nfs_server *server = NFS_SERVER(inode);
4157 struct rpc_task *task;
4158 struct rpc_message msg = {
4159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4162 struct rpc_task_setup task_setup_data = {
4163 .rpc_client = server->client,
4164 .rpc_message = &msg,
4165 .callback_ops = &nfs4_delegreturn_ops,
4166 .flags = RPC_TASK_ASYNC,
4170 data = kzalloc(sizeof(*data), GFP_NOFS);
4173 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4174 data->args.fhandle = &data->fh;
4175 data->args.stateid = &data->stateid;
4176 data->args.bitmask = server->cache_consistency_bitmask;
4177 nfs_copy_fh(&data->fh, NFS_FH(inode));
4178 nfs4_stateid_copy(&data->stateid, stateid);
4179 data->res.fattr = &data->fattr;
4180 data->res.server = server;
4181 nfs_fattr_init(data->res.fattr);
4182 data->timestamp = jiffies;
4183 data->rpc_status = 0;
4185 task_setup_data.callback_data = data;
4186 msg.rpc_argp = &data->args;
4187 msg.rpc_resp = &data->res;
4188 task = rpc_run_task(&task_setup_data);
4190 return PTR_ERR(task);
4193 status = nfs4_wait_for_completion_rpc_task(task);
4196 status = data->rpc_status;
4198 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4200 nfs_refresh_inode(inode, &data->fattr);
4206 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4208 struct nfs_server *server = NFS_SERVER(inode);
4209 struct nfs4_exception exception = { };
4212 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4214 case -NFS4ERR_STALE_STATEID:
4215 case -NFS4ERR_EXPIRED:
4219 err = nfs4_handle_exception(server, err, &exception);
4220 } while (exception.retry);
4224 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4225 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4228 * sleep, with exponential backoff, and retry the LOCK operation.
4230 static unsigned long
4231 nfs4_set_lock_task_retry(unsigned long timeout)
4233 freezable_schedule_timeout_killable(timeout);
4235 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4236 return NFS4_LOCK_MAXTIMEOUT;
4240 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4242 struct inode *inode = state->inode;
4243 struct nfs_server *server = NFS_SERVER(inode);
4244 struct nfs_client *clp = server->nfs_client;
4245 struct nfs_lockt_args arg = {
4246 .fh = NFS_FH(inode),
4249 struct nfs_lockt_res res = {
4252 struct rpc_message msg = {
4253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4256 .rpc_cred = state->owner->so_cred,
4258 struct nfs4_lock_state *lsp;
4261 arg.lock_owner.clientid = clp->cl_clientid;
4262 status = nfs4_set_lock_state(state, request);
4265 lsp = request->fl_u.nfs4_fl.owner;
4266 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4267 arg.lock_owner.s_dev = server->s_dev;
4268 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4271 request->fl_type = F_UNLCK;
4273 case -NFS4ERR_DENIED:
4276 request->fl_ops->fl_release_private(request);
4281 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4283 struct nfs4_exception exception = { };
4287 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4288 _nfs4_proc_getlk(state, cmd, request),
4290 } while (exception.retry);
4294 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4297 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4299 res = posix_lock_file_wait(file, fl);
4302 res = flock_lock_file_wait(file, fl);
4310 struct nfs4_unlockdata {
4311 struct nfs_locku_args arg;
4312 struct nfs_locku_res res;
4313 struct nfs4_lock_state *lsp;
4314 struct nfs_open_context *ctx;
4315 struct file_lock fl;
4316 const struct nfs_server *server;
4317 unsigned long timestamp;
4320 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4321 struct nfs_open_context *ctx,
4322 struct nfs4_lock_state *lsp,
4323 struct nfs_seqid *seqid)
4325 struct nfs4_unlockdata *p;
4326 struct inode *inode = lsp->ls_state->inode;
4328 p = kzalloc(sizeof(*p), GFP_NOFS);
4331 p->arg.fh = NFS_FH(inode);
4333 p->arg.seqid = seqid;
4334 p->res.seqid = seqid;
4335 p->arg.stateid = &lsp->ls_stateid;
4337 atomic_inc(&lsp->ls_count);
4338 /* Ensure we don't close file until we're done freeing locks! */
4339 p->ctx = get_nfs_open_context(ctx);
4340 memcpy(&p->fl, fl, sizeof(p->fl));
4341 p->server = NFS_SERVER(inode);
4345 static void nfs4_locku_release_calldata(void *data)
4347 struct nfs4_unlockdata *calldata = data;
4348 nfs_free_seqid(calldata->arg.seqid);
4349 nfs4_put_lock_state(calldata->lsp);
4350 put_nfs_open_context(calldata->ctx);
4354 static void nfs4_locku_done(struct rpc_task *task, void *data)
4356 struct nfs4_unlockdata *calldata = data;
4358 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4360 switch (task->tk_status) {
4362 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4363 &calldata->res.stateid);
4364 renew_lease(calldata->server, calldata->timestamp);
4366 case -NFS4ERR_BAD_STATEID:
4367 case -NFS4ERR_OLD_STATEID:
4368 case -NFS4ERR_STALE_STATEID:
4369 case -NFS4ERR_EXPIRED:
4372 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4373 rpc_restart_call_prepare(task);
4375 nfs_release_seqid(calldata->arg.seqid);
4378 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4380 struct nfs4_unlockdata *calldata = data;
4382 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4384 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
4385 /* Note: exit _without_ running nfs4_locku_done */
4386 task->tk_action = NULL;
4389 calldata->timestamp = jiffies;
4390 if (nfs4_setup_sequence(calldata->server,
4391 &calldata->arg.seq_args,
4392 &calldata->res.seq_res,
4394 nfs_release_seqid(calldata->arg.seqid);
4397 static const struct rpc_call_ops nfs4_locku_ops = {
4398 .rpc_call_prepare = nfs4_locku_prepare,
4399 .rpc_call_done = nfs4_locku_done,
4400 .rpc_release = nfs4_locku_release_calldata,
4403 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4404 struct nfs_open_context *ctx,
4405 struct nfs4_lock_state *lsp,
4406 struct nfs_seqid *seqid)
4408 struct nfs4_unlockdata *data;
4409 struct rpc_message msg = {
4410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4411 .rpc_cred = ctx->cred,
4413 struct rpc_task_setup task_setup_data = {
4414 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4415 .rpc_message = &msg,
4416 .callback_ops = &nfs4_locku_ops,
4417 .workqueue = nfsiod_workqueue,
4418 .flags = RPC_TASK_ASYNC,
4421 /* Ensure this is an unlock - when canceling a lock, the
4422 * canceled lock is passed in, and it won't be an unlock.
4424 fl->fl_type = F_UNLCK;
4426 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4428 nfs_free_seqid(seqid);
4429 return ERR_PTR(-ENOMEM);
4432 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4433 msg.rpc_argp = &data->arg;
4434 msg.rpc_resp = &data->res;
4435 task_setup_data.callback_data = data;
4436 return rpc_run_task(&task_setup_data);
4439 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4441 struct nfs_inode *nfsi = NFS_I(state->inode);
4442 struct nfs_seqid *seqid;
4443 struct nfs4_lock_state *lsp;
4444 struct rpc_task *task;
4446 unsigned char fl_flags = request->fl_flags;
4448 status = nfs4_set_lock_state(state, request);
4449 /* Unlock _before_ we do the RPC call */
4450 request->fl_flags |= FL_EXISTS;
4451 down_read(&nfsi->rwsem);
4452 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4453 up_read(&nfsi->rwsem);
4456 up_read(&nfsi->rwsem);
4459 /* Is this a delegated lock? */
4460 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4462 lsp = request->fl_u.nfs4_fl.owner;
4463 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4467 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4468 status = PTR_ERR(task);
4471 status = nfs4_wait_for_completion_rpc_task(task);
4474 request->fl_flags = fl_flags;
4478 struct nfs4_lockdata {
4479 struct nfs_lock_args arg;
4480 struct nfs_lock_res res;
4481 struct nfs4_lock_state *lsp;
4482 struct nfs_open_context *ctx;
4483 struct file_lock fl;
4484 unsigned long timestamp;
4487 struct nfs_server *server;
4490 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4491 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4494 struct nfs4_lockdata *p;
4495 struct inode *inode = lsp->ls_state->inode;
4496 struct nfs_server *server = NFS_SERVER(inode);
4498 p = kzalloc(sizeof(*p), gfp_mask);
4502 p->arg.fh = NFS_FH(inode);
4504 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4505 if (p->arg.open_seqid == NULL)
4507 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4508 if (p->arg.lock_seqid == NULL)
4509 goto out_free_seqid;
4510 p->arg.lock_stateid = &lsp->ls_stateid;
4511 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4512 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4513 p->arg.lock_owner.s_dev = server->s_dev;
4514 p->res.lock_seqid = p->arg.lock_seqid;
4517 atomic_inc(&lsp->ls_count);
4518 p->ctx = get_nfs_open_context(ctx);
4519 memcpy(&p->fl, fl, sizeof(p->fl));
4522 nfs_free_seqid(p->arg.open_seqid);
4528 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4530 struct nfs4_lockdata *data = calldata;
4531 struct nfs4_state *state = data->lsp->ls_state;
4533 dprintk("%s: begin!\n", __func__);
4534 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4536 /* Do we need to do an open_to_lock_owner? */
4537 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4538 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
4539 goto out_release_lock_seqid;
4541 data->arg.open_stateid = &state->stateid;
4542 data->arg.new_lock_owner = 1;
4543 data->res.open_seqid = data->arg.open_seqid;
4545 data->arg.new_lock_owner = 0;
4546 data->timestamp = jiffies;
4547 if (nfs4_setup_sequence(data->server,
4548 &data->arg.seq_args,
4552 nfs_release_seqid(data->arg.open_seqid);
4553 out_release_lock_seqid:
4554 nfs_release_seqid(data->arg.lock_seqid);
4555 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4558 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4560 struct nfs4_lockdata *data = calldata;
4562 dprintk("%s: begin!\n", __func__);
4564 if (!nfs4_sequence_done(task, &data->res.seq_res))
4567 data->rpc_status = task->tk_status;
4568 if (data->arg.new_lock_owner != 0) {
4569 if (data->rpc_status == 0)
4570 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4574 if (data->rpc_status == 0) {
4575 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4576 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
4577 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4580 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4583 static void nfs4_lock_release(void *calldata)
4585 struct nfs4_lockdata *data = calldata;
4587 dprintk("%s: begin!\n", __func__);
4588 nfs_free_seqid(data->arg.open_seqid);
4589 if (data->cancelled != 0) {
4590 struct rpc_task *task;
4591 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4592 data->arg.lock_seqid);
4594 rpc_put_task_async(task);
4595 dprintk("%s: cancelling lock!\n", __func__);
4597 nfs_free_seqid(data->arg.lock_seqid);
4598 nfs4_put_lock_state(data->lsp);
4599 put_nfs_open_context(data->ctx);
4601 dprintk("%s: done!\n", __func__);
4604 static const struct rpc_call_ops nfs4_lock_ops = {
4605 .rpc_call_prepare = nfs4_lock_prepare,
4606 .rpc_call_done = nfs4_lock_done,
4607 .rpc_release = nfs4_lock_release,
4610 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4613 case -NFS4ERR_ADMIN_REVOKED:
4614 case -NFS4ERR_BAD_STATEID:
4615 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4616 if (new_lock_owner != 0 ||
4617 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
4618 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4620 case -NFS4ERR_STALE_STATEID:
4621 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4622 case -NFS4ERR_EXPIRED:
4623 nfs4_schedule_lease_recovery(server->nfs_client);
4627 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4629 struct nfs4_lockdata *data;
4630 struct rpc_task *task;
4631 struct rpc_message msg = {
4632 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4633 .rpc_cred = state->owner->so_cred,
4635 struct rpc_task_setup task_setup_data = {
4636 .rpc_client = NFS_CLIENT(state->inode),
4637 .rpc_message = &msg,
4638 .callback_ops = &nfs4_lock_ops,
4639 .workqueue = nfsiod_workqueue,
4640 .flags = RPC_TASK_ASYNC,
4644 dprintk("%s: begin!\n", __func__);
4645 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4646 fl->fl_u.nfs4_fl.owner,
4647 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4651 data->arg.block = 1;
4652 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4653 msg.rpc_argp = &data->arg;
4654 msg.rpc_resp = &data->res;
4655 task_setup_data.callback_data = data;
4656 if (recovery_type > NFS_LOCK_NEW) {
4657 if (recovery_type == NFS_LOCK_RECLAIM)
4658 data->arg.reclaim = NFS_LOCK_RECLAIM;
4659 nfs4_set_sequence_privileged(&data->arg.seq_args);
4661 task = rpc_run_task(&task_setup_data);
4663 return PTR_ERR(task);
4664 ret = nfs4_wait_for_completion_rpc_task(task);
4666 ret = data->rpc_status;
4668 nfs4_handle_setlk_error(data->server, data->lsp,
4669 data->arg.new_lock_owner, ret);
4671 data->cancelled = 1;
4673 dprintk("%s: done, ret = %d!\n", __func__, ret);
4677 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4679 struct nfs_server *server = NFS_SERVER(state->inode);
4680 struct nfs4_exception exception = {
4681 .inode = state->inode,
4686 /* Cache the lock if possible... */
4687 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4689 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4690 if (err != -NFS4ERR_DELAY)
4692 nfs4_handle_exception(server, err, &exception);
4693 } while (exception.retry);
4697 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4699 struct nfs_server *server = NFS_SERVER(state->inode);
4700 struct nfs4_exception exception = {
4701 .inode = state->inode,
4705 err = nfs4_set_lock_state(state, request);
4709 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4711 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4715 case -NFS4ERR_GRACE:
4716 case -NFS4ERR_DELAY:
4717 nfs4_handle_exception(server, err, &exception);
4720 } while (exception.retry);
4725 #if defined(CONFIG_NFS_V4_1)
4727 * nfs41_check_expired_locks - possibly free a lock stateid
4729 * @state: NFSv4 state for an inode
4731 * Returns NFS_OK if recovery for this stateid is now finished.
4732 * Otherwise a negative NFS4ERR value is returned.
4734 static int nfs41_check_expired_locks(struct nfs4_state *state)
4736 int status, ret = -NFS4ERR_BAD_STATEID;
4737 struct nfs4_lock_state *lsp;
4738 struct nfs_server *server = NFS_SERVER(state->inode);
4740 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4741 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
4742 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4743 if (status != NFS_OK) {
4744 /* Free the stateid unless the server
4745 * informs us the stateid is unrecognized. */
4746 if (status != -NFS4ERR_BAD_STATEID)
4747 nfs41_free_stateid(server,
4749 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
4758 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4760 int status = NFS_OK;
4762 if (test_bit(LK_STATE_IN_USE, &state->flags))
4763 status = nfs41_check_expired_locks(state);
4764 if (status != NFS_OK)
4765 status = nfs4_lock_expired(state, request);
4770 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4772 struct nfs_inode *nfsi = NFS_I(state->inode);
4773 unsigned char fl_flags = request->fl_flags;
4774 int status = -ENOLCK;
4776 if ((fl_flags & FL_POSIX) &&
4777 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4779 /* Is this a delegated open? */
4780 status = nfs4_set_lock_state(state, request);
4783 request->fl_flags |= FL_ACCESS;
4784 status = do_vfs_lock(request->fl_file, request);
4787 down_read(&nfsi->rwsem);
4788 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4789 /* Yes: cache locks! */
4790 /* ...but avoid races with delegation recall... */
4791 request->fl_flags = fl_flags & ~FL_SLEEP;
4792 status = do_vfs_lock(request->fl_file, request);
4795 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4798 /* Note: we always want to sleep here! */
4799 request->fl_flags = fl_flags | FL_SLEEP;
4800 if (do_vfs_lock(request->fl_file, request) < 0)
4801 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4802 "manager!\n", __func__);
4804 up_read(&nfsi->rwsem);
4806 request->fl_flags = fl_flags;
4810 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4812 struct nfs4_exception exception = {
4814 .inode = state->inode,
4819 err = _nfs4_proc_setlk(state, cmd, request);
4820 if (err == -NFS4ERR_DENIED)
4822 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4824 } while (exception.retry);
4829 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4831 struct nfs_open_context *ctx;
4832 struct nfs4_state *state;
4833 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4836 /* verify open state */
4837 ctx = nfs_file_open_context(filp);
4840 if (request->fl_start < 0 || request->fl_end < 0)
4843 if (IS_GETLK(cmd)) {
4845 return nfs4_proc_getlk(state, F_GETLK, request);
4849 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4852 if (request->fl_type == F_UNLCK) {
4854 return nfs4_proc_unlck(state, cmd, request);
4861 * Don't rely on the VFS having checked the file open mode,
4862 * since it won't do this for flock() locks.
4864 switch (request->fl_type) {
4866 if (!(filp->f_mode & FMODE_READ))
4870 if (!(filp->f_mode & FMODE_WRITE))
4875 status = nfs4_proc_setlk(state, cmd, request);
4876 if ((status != -EAGAIN) || IS_SETLK(cmd))
4878 timeout = nfs4_set_lock_task_retry(timeout);
4879 status = -ERESTARTSYS;
4882 } while(status < 0);
4886 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4888 struct nfs_server *server = NFS_SERVER(state->inode);
4889 struct nfs4_exception exception = { };
4892 err = nfs4_set_lock_state(state, fl);
4896 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4899 printk(KERN_ERR "NFS: %s: unhandled error "
4900 "%d.\n", __func__, err);
4904 case -NFS4ERR_EXPIRED:
4905 nfs4_schedule_stateid_recovery(server, state);
4906 case -NFS4ERR_STALE_CLIENTID:
4907 case -NFS4ERR_STALE_STATEID:
4908 nfs4_schedule_lease_recovery(server->nfs_client);
4910 case -NFS4ERR_BADSESSION:
4911 case -NFS4ERR_BADSLOT:
4912 case -NFS4ERR_BAD_HIGH_SLOT:
4913 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4914 case -NFS4ERR_DEADSESSION:
4915 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
4919 * The show must go on: exit, but mark the
4920 * stateid as needing recovery.
4922 case -NFS4ERR_DELEG_REVOKED:
4923 case -NFS4ERR_ADMIN_REVOKED:
4924 case -NFS4ERR_BAD_STATEID:
4925 case -NFS4ERR_OPENMODE:
4926 nfs4_schedule_stateid_recovery(server, state);
4931 * User RPCSEC_GSS context has expired.
4932 * We cannot recover this stateid now, so
4933 * skip it and allow recovery thread to
4939 case -NFS4ERR_DENIED:
4940 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4943 case -NFS4ERR_DELAY:
4946 err = nfs4_handle_exception(server, err, &exception);
4947 } while (exception.retry);
4952 struct nfs_release_lockowner_data {
4953 struct nfs4_lock_state *lsp;
4954 struct nfs_server *server;
4955 struct nfs_release_lockowner_args args;
4958 static void nfs4_release_lockowner_release(void *calldata)
4960 struct nfs_release_lockowner_data *data = calldata;
4961 nfs4_free_lock_state(data->server, data->lsp);
4965 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
4966 .rpc_release = nfs4_release_lockowner_release,
4969 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
4971 struct nfs_server *server = lsp->ls_state->owner->so_server;
4972 struct nfs_release_lockowner_data *data;
4973 struct rpc_message msg = {
4974 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4977 if (server->nfs_client->cl_mvops->minor_version != 0)
4979 data = kmalloc(sizeof(*data), GFP_NOFS);
4983 data->server = server;
4984 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4985 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4986 data->args.lock_owner.s_dev = server->s_dev;
4987 msg.rpc_argp = &data->args;
4988 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4992 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4994 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4995 const void *buf, size_t buflen,
4996 int flags, int type)
4998 if (strcmp(key, "") != 0)
5001 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5004 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5005 void *buf, size_t buflen, int type)
5007 if (strcmp(key, "") != 0)
5010 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5013 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5014 size_t list_len, const char *name,
5015 size_t name_len, int type)
5017 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5019 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5022 if (list && len <= list_len)
5023 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5028 * nfs_fhget will use either the mounted_on_fileid or the fileid
5030 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5032 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5033 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5034 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5035 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5038 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5039 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5040 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5044 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5045 const struct qstr *name,
5046 struct nfs4_fs_locations *fs_locations,
5049 struct nfs_server *server = NFS_SERVER(dir);
5051 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5053 struct nfs4_fs_locations_arg args = {
5054 .dir_fh = NFS_FH(dir),
5059 struct nfs4_fs_locations_res res = {
5060 .fs_locations = fs_locations,
5062 struct rpc_message msg = {
5063 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5069 dprintk("%s: start\n", __func__);
5071 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5072 * is not supported */
5073 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5074 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5076 bitmask[0] |= FATTR4_WORD0_FILEID;
5078 nfs_fattr_init(&fs_locations->fattr);
5079 fs_locations->server = server;
5080 fs_locations->nlocations = 0;
5081 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5082 dprintk("%s: returned status = %d\n", __func__, status);
5086 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5087 const struct qstr *name,
5088 struct nfs4_fs_locations *fs_locations,
5091 struct nfs4_exception exception = { };
5094 err = nfs4_handle_exception(NFS_SERVER(dir),
5095 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5097 } while (exception.retry);
5101 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5104 struct nfs4_secinfo_arg args = {
5105 .dir_fh = NFS_FH(dir),
5108 struct nfs4_secinfo_res res = {
5111 struct rpc_message msg = {
5112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5117 dprintk("NFS call secinfo %s\n", name->name);
5118 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5119 dprintk("NFS reply secinfo: %d\n", status);
5123 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5124 struct nfs4_secinfo_flavors *flavors)
5126 struct nfs4_exception exception = { };
5129 err = nfs4_handle_exception(NFS_SERVER(dir),
5130 _nfs4_proc_secinfo(dir, name, flavors),
5132 } while (exception.retry);
5136 #ifdef CONFIG_NFS_V4_1
5138 * Check the exchange flags returned by the server for invalid flags, having
5139 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5142 static int nfs4_check_cl_exchange_flags(u32 flags)
5144 if (flags & ~EXCHGID4_FLAG_MASK_R)
5146 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5147 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5149 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5153 return -NFS4ERR_INVAL;
5157 nfs41_same_server_scope(struct nfs41_server_scope *a,
5158 struct nfs41_server_scope *b)
5160 if (a->server_scope_sz == b->server_scope_sz &&
5161 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5168 * nfs4_proc_bind_conn_to_session()
5170 * The 4.1 client currently uses the same TCP connection for the
5171 * fore and backchannel.
5173 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5176 struct nfs41_bind_conn_to_session_res res;
5177 struct rpc_message msg = {
5179 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5185 dprintk("--> %s\n", __func__);
5187 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5188 if (unlikely(res.session == NULL)) {
5193 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5195 if (memcmp(res.session->sess_id.data,
5196 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5197 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5201 if (res.dir != NFS4_CDFS4_BOTH) {
5202 dprintk("NFS: %s: Unexpected direction from server\n",
5207 if (res.use_conn_in_rdma_mode) {
5208 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5217 dprintk("<-- %s status= %d\n", __func__, status);
5222 * nfs4_proc_exchange_id()
5224 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5226 * Since the clientid has expired, all compounds using sessions
5227 * associated with the stale clientid will be returning
5228 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5229 * be in some phase of session reset.
5231 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5233 nfs4_verifier verifier;
5234 struct nfs41_exchange_id_args args = {
5235 .verifier = &verifier,
5237 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5239 struct nfs41_exchange_id_res res = {
5243 struct rpc_message msg = {
5244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5250 nfs4_init_boot_verifier(clp, &verifier);
5251 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5253 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5254 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5255 args.id_len, args.id);
5257 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5259 if (unlikely(res.server_owner == NULL)) {
5264 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5266 if (unlikely(res.server_scope == NULL)) {
5268 goto out_server_owner;
5271 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5272 if (unlikely(res.impl_id == NULL)) {
5274 goto out_server_scope;
5277 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5279 status = nfs4_check_cl_exchange_flags(res.flags);
5282 clp->cl_clientid = res.clientid;
5283 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5284 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5285 clp->cl_seqid = res.seqid;
5287 kfree(clp->cl_serverowner);
5288 clp->cl_serverowner = res.server_owner;
5289 res.server_owner = NULL;
5291 /* use the most recent implementation id */
5292 kfree(clp->cl_implid);
5293 clp->cl_implid = res.impl_id;
5295 if (clp->cl_serverscope != NULL &&
5296 !nfs41_same_server_scope(clp->cl_serverscope,
5297 res.server_scope)) {
5298 dprintk("%s: server_scope mismatch detected\n",
5300 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5301 kfree(clp->cl_serverscope);
5302 clp->cl_serverscope = NULL;
5305 if (clp->cl_serverscope == NULL) {
5306 clp->cl_serverscope = res.server_scope;
5313 kfree(res.server_owner);
5315 kfree(res.server_scope);
5317 if (clp->cl_implid != NULL)
5318 dprintk("NFS reply exchange_id: Server Implementation ID: "
5319 "domain: %s, name: %s, date: %llu,%u\n",
5320 clp->cl_implid->domain, clp->cl_implid->name,
5321 clp->cl_implid->date.seconds,
5322 clp->cl_implid->date.nseconds);
5323 dprintk("NFS reply exchange_id: %d\n", status);
5327 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5328 struct rpc_cred *cred)
5330 struct rpc_message msg = {
5331 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5337 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5339 dprintk("NFS: Got error %d from the server %s on "
5340 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5344 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5345 struct rpc_cred *cred)
5350 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5351 ret = _nfs4_proc_destroy_clientid(clp, cred);
5353 case -NFS4ERR_DELAY:
5354 case -NFS4ERR_CLIENTID_BUSY:
5364 int nfs4_destroy_clientid(struct nfs_client *clp)
5366 struct rpc_cred *cred;
5369 if (clp->cl_mvops->minor_version < 1)
5371 if (clp->cl_exchange_flags == 0)
5373 if (clp->cl_preserve_clid)
5375 cred = nfs4_get_exchange_id_cred(clp);
5376 ret = nfs4_proc_destroy_clientid(clp, cred);
5381 case -NFS4ERR_STALE_CLIENTID:
5382 clp->cl_exchange_flags = 0;
5388 struct nfs4_get_lease_time_data {
5389 struct nfs4_get_lease_time_args *args;
5390 struct nfs4_get_lease_time_res *res;
5391 struct nfs_client *clp;
5394 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5397 struct nfs4_get_lease_time_data *data =
5398 (struct nfs4_get_lease_time_data *)calldata;
5400 dprintk("--> %s\n", __func__);
5401 /* just setup sequence, do not trigger session recovery
5402 since we're invoked within one */
5403 nfs41_setup_sequence(data->clp->cl_session,
5404 &data->args->la_seq_args,
5405 &data->res->lr_seq_res,
5407 dprintk("<-- %s\n", __func__);
5411 * Called from nfs4_state_manager thread for session setup, so don't recover
5412 * from sequence operation or clientid errors.
5414 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5416 struct nfs4_get_lease_time_data *data =
5417 (struct nfs4_get_lease_time_data *)calldata;
5419 dprintk("--> %s\n", __func__);
5420 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5422 switch (task->tk_status) {
5423 case -NFS4ERR_DELAY:
5424 case -NFS4ERR_GRACE:
5425 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5426 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5427 task->tk_status = 0;
5429 case -NFS4ERR_RETRY_UNCACHED_REP:
5430 rpc_restart_call_prepare(task);
5433 dprintk("<-- %s\n", __func__);
5436 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5437 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5438 .rpc_call_done = nfs4_get_lease_time_done,
5441 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5443 struct rpc_task *task;
5444 struct nfs4_get_lease_time_args args;
5445 struct nfs4_get_lease_time_res res = {
5446 .lr_fsinfo = fsinfo,
5448 struct nfs4_get_lease_time_data data = {
5453 struct rpc_message msg = {
5454 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5458 struct rpc_task_setup task_setup = {
5459 .rpc_client = clp->cl_rpcclient,
5460 .rpc_message = &msg,
5461 .callback_ops = &nfs4_get_lease_time_ops,
5462 .callback_data = &data,
5463 .flags = RPC_TASK_TIMEOUT,
5467 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5468 nfs4_set_sequence_privileged(&args.la_seq_args);
5469 dprintk("--> %s\n", __func__);
5470 task = rpc_run_task(&task_setup);
5473 status = PTR_ERR(task);
5475 status = task->tk_status;
5478 dprintk("<-- %s return %d\n", __func__, status);
5484 * Initialize the values to be used by the client in CREATE_SESSION
5485 * If nfs4_init_session set the fore channel request and response sizes,
5488 * Set the back channel max_resp_sz_cached to zero to force the client to
5489 * always set csa_cachethis to FALSE because the current implementation
5490 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5492 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5494 struct nfs4_session *session = args->client->cl_session;
5495 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5496 mxresp_sz = session->fc_target_max_resp_sz;
5499 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5501 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5502 /* Fore channel attributes */
5503 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5504 args->fc_attrs.max_resp_sz = mxresp_sz;
5505 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5506 args->fc_attrs.max_reqs = max_session_slots;
5508 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5509 "max_ops=%u max_reqs=%u\n",
5511 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5512 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5514 /* Back channel attributes */
5515 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5516 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5517 args->bc_attrs.max_resp_sz_cached = 0;
5518 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5519 args->bc_attrs.max_reqs = 1;
5521 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5522 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5524 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5525 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5526 args->bc_attrs.max_reqs);
5529 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5531 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5532 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5534 if (rcvd->max_resp_sz > sent->max_resp_sz)
5537 * Our requested max_ops is the minimum we need; we're not
5538 * prepared to break up compounds into smaller pieces than that.
5539 * So, no point even trying to continue if the server won't
5542 if (rcvd->max_ops < sent->max_ops)
5544 if (rcvd->max_reqs == 0)
5546 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5547 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5551 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5553 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5554 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5556 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5558 if (rcvd->max_resp_sz < sent->max_resp_sz)
5560 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5562 /* These would render the backchannel useless: */
5563 if (rcvd->max_ops != sent->max_ops)
5565 if (rcvd->max_reqs != sent->max_reqs)
5570 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5571 struct nfs4_session *session)
5575 ret = nfs4_verify_fore_channel_attrs(args, session);
5578 return nfs4_verify_back_channel_attrs(args, session);
5581 static int _nfs4_proc_create_session(struct nfs_client *clp,
5582 struct rpc_cred *cred)
5584 struct nfs4_session *session = clp->cl_session;
5585 struct nfs41_create_session_args args = {
5587 .cb_program = NFS4_CALLBACK,
5589 struct nfs41_create_session_res res = {
5592 struct rpc_message msg = {
5593 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5600 nfs4_init_channel_attrs(&args);
5601 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5603 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5606 /* Verify the session's negotiated channel_attrs values */
5607 status = nfs4_verify_channel_attrs(&args, session);
5608 /* Increment the clientid slot sequence id */
5616 * Issues a CREATE_SESSION operation to the server.
5617 * It is the responsibility of the caller to verify the session is
5618 * expired before calling this routine.
5620 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5624 struct nfs4_session *session = clp->cl_session;
5626 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5628 status = _nfs4_proc_create_session(clp, cred);
5632 /* Init or reset the session slot tables */
5633 status = nfs4_setup_session_slot_tables(session);
5634 dprintk("slot table setup returned %d\n", status);
5638 ptr = (unsigned *)&session->sess_id.data[0];
5639 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5640 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5642 dprintk("<-- %s\n", __func__);
5647 * Issue the over-the-wire RPC DESTROY_SESSION.
5648 * The caller must serialize access to this routine.
5650 int nfs4_proc_destroy_session(struct nfs4_session *session,
5651 struct rpc_cred *cred)
5653 struct rpc_message msg = {
5654 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5655 .rpc_argp = session,
5660 dprintk("--> nfs4_proc_destroy_session\n");
5662 /* session is still being setup */
5663 if (session->clp->cl_cons_state != NFS_CS_READY)
5666 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5669 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
5670 "Session has been destroyed regardless...\n", status);
5672 dprintk("<-- nfs4_proc_destroy_session\n");
5677 * Renew the cl_session lease.
5679 struct nfs4_sequence_data {
5680 struct nfs_client *clp;
5681 struct nfs4_sequence_args args;
5682 struct nfs4_sequence_res res;
5685 static void nfs41_sequence_release(void *data)
5687 struct nfs4_sequence_data *calldata = data;
5688 struct nfs_client *clp = calldata->clp;
5690 if (atomic_read(&clp->cl_count) > 1)
5691 nfs4_schedule_state_renewal(clp);
5692 nfs_put_client(clp);
5696 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5698 switch(task->tk_status) {
5699 case -NFS4ERR_DELAY:
5700 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5703 nfs4_schedule_lease_recovery(clp);
5708 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5710 struct nfs4_sequence_data *calldata = data;
5711 struct nfs_client *clp = calldata->clp;
5713 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5716 if (task->tk_status < 0) {
5717 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5718 if (atomic_read(&clp->cl_count) == 1)
5721 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5722 rpc_restart_call_prepare(task);
5726 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5728 dprintk("<-- %s\n", __func__);
5731 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5733 struct nfs4_sequence_data *calldata = data;
5734 struct nfs_client *clp = calldata->clp;
5735 struct nfs4_sequence_args *args;
5736 struct nfs4_sequence_res *res;
5738 args = task->tk_msg.rpc_argp;
5739 res = task->tk_msg.rpc_resp;
5741 nfs41_setup_sequence(clp->cl_session, args, res, task);
5744 static const struct rpc_call_ops nfs41_sequence_ops = {
5745 .rpc_call_done = nfs41_sequence_call_done,
5746 .rpc_call_prepare = nfs41_sequence_prepare,
5747 .rpc_release = nfs41_sequence_release,
5750 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5751 struct rpc_cred *cred,
5754 struct nfs4_sequence_data *calldata;
5755 struct rpc_message msg = {
5756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5759 struct rpc_task_setup task_setup_data = {
5760 .rpc_client = clp->cl_rpcclient,
5761 .rpc_message = &msg,
5762 .callback_ops = &nfs41_sequence_ops,
5763 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5766 if (!atomic_inc_not_zero(&clp->cl_count))
5767 return ERR_PTR(-EIO);
5768 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5769 if (calldata == NULL) {
5770 nfs_put_client(clp);
5771 return ERR_PTR(-ENOMEM);
5773 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5775 nfs4_set_sequence_privileged(&calldata->args);
5776 msg.rpc_argp = &calldata->args;
5777 msg.rpc_resp = &calldata->res;
5778 calldata->clp = clp;
5779 task_setup_data.callback_data = calldata;
5781 return rpc_run_task(&task_setup_data);
5784 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5786 struct rpc_task *task;
5789 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5791 task = _nfs41_proc_sequence(clp, cred, false);
5793 ret = PTR_ERR(task);
5795 rpc_put_task_async(task);
5796 dprintk("<-- %s status=%d\n", __func__, ret);
5800 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5802 struct rpc_task *task;
5805 task = _nfs41_proc_sequence(clp, cred, true);
5807 ret = PTR_ERR(task);
5810 ret = rpc_wait_for_completion_task(task);
5812 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5814 if (task->tk_status == 0)
5815 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5816 ret = task->tk_status;
5820 dprintk("<-- %s status=%d\n", __func__, ret);
5824 struct nfs4_reclaim_complete_data {
5825 struct nfs_client *clp;
5826 struct nfs41_reclaim_complete_args arg;
5827 struct nfs41_reclaim_complete_res res;
5830 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5832 struct nfs4_reclaim_complete_data *calldata = data;
5834 nfs41_setup_sequence(calldata->clp->cl_session,
5835 &calldata->arg.seq_args,
5836 &calldata->res.seq_res,
5840 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5842 switch(task->tk_status) {
5844 case -NFS4ERR_COMPLETE_ALREADY:
5845 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5847 case -NFS4ERR_DELAY:
5848 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5850 case -NFS4ERR_RETRY_UNCACHED_REP:
5853 nfs4_schedule_lease_recovery(clp);
5858 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5860 struct nfs4_reclaim_complete_data *calldata = data;
5861 struct nfs_client *clp = calldata->clp;
5862 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5864 dprintk("--> %s\n", __func__);
5865 if (!nfs41_sequence_done(task, res))
5868 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5869 rpc_restart_call_prepare(task);
5872 dprintk("<-- %s\n", __func__);
5875 static void nfs4_free_reclaim_complete_data(void *data)
5877 struct nfs4_reclaim_complete_data *calldata = data;
5882 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5883 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5884 .rpc_call_done = nfs4_reclaim_complete_done,
5885 .rpc_release = nfs4_free_reclaim_complete_data,
5889 * Issue a global reclaim complete.
5891 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5893 struct nfs4_reclaim_complete_data *calldata;
5894 struct rpc_task *task;
5895 struct rpc_message msg = {
5896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5898 struct rpc_task_setup task_setup_data = {
5899 .rpc_client = clp->cl_rpcclient,
5900 .rpc_message = &msg,
5901 .callback_ops = &nfs4_reclaim_complete_call_ops,
5902 .flags = RPC_TASK_ASYNC,
5904 int status = -ENOMEM;
5906 dprintk("--> %s\n", __func__);
5907 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5908 if (calldata == NULL)
5910 calldata->clp = clp;
5911 calldata->arg.one_fs = 0;
5913 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
5914 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
5915 msg.rpc_argp = &calldata->arg;
5916 msg.rpc_resp = &calldata->res;
5917 task_setup_data.callback_data = calldata;
5918 task = rpc_run_task(&task_setup_data);
5920 status = PTR_ERR(task);
5923 status = nfs4_wait_for_completion_rpc_task(task);
5925 status = task->tk_status;
5929 dprintk("<-- %s status=%d\n", __func__, status);
5934 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5936 struct nfs4_layoutget *lgp = calldata;
5937 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5938 struct nfs4_session *session = nfs4_get_session(server);
5940 dprintk("--> %s\n", __func__);
5941 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5942 * right now covering the LAYOUTGET we are about to send.
5943 * However, that is not so catastrophic, and there seems
5944 * to be no way to prevent it completely.
5946 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
5947 &lgp->res.seq_res, task))
5949 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5950 NFS_I(lgp->args.inode)->layout,
5951 lgp->args.ctx->state)) {
5952 rpc_exit(task, NFS4_OK);
5956 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5958 struct nfs4_layoutget *lgp = calldata;
5959 struct inode *inode = lgp->args.inode;
5960 struct nfs_server *server = NFS_SERVER(inode);
5961 struct pnfs_layout_hdr *lo;
5962 struct nfs4_state *state = NULL;
5964 dprintk("--> %s\n", __func__);
5966 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
5969 switch (task->tk_status) {
5972 case -NFS4ERR_LAYOUTTRYLATER:
5973 case -NFS4ERR_RECALLCONFLICT:
5974 task->tk_status = -NFS4ERR_DELAY;
5976 case -NFS4ERR_EXPIRED:
5977 case -NFS4ERR_BAD_STATEID:
5978 spin_lock(&inode->i_lock);
5979 lo = NFS_I(inode)->layout;
5980 if (!lo || list_empty(&lo->plh_segs)) {
5981 spin_unlock(&inode->i_lock);
5982 /* If the open stateid was bad, then recover it. */
5983 state = lgp->args.ctx->state;
5987 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
5988 spin_unlock(&inode->i_lock);
5989 /* Mark the bad layout state as invalid, then
5990 * retry using the open stateid. */
5991 pnfs_free_lseg_list(&head);
5994 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
5995 rpc_restart_call_prepare(task);
5997 dprintk("<-- %s\n", __func__);
6000 static size_t max_response_pages(struct nfs_server *server)
6002 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6003 return nfs_page_array_len(0, max_resp_sz);
6006 static void nfs4_free_pages(struct page **pages, size_t size)
6013 for (i = 0; i < size; i++) {
6016 __free_page(pages[i]);
6021 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6023 struct page **pages;
6026 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6028 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6032 for (i = 0; i < size; i++) {
6033 pages[i] = alloc_page(gfp_flags);
6035 dprintk("%s: failed to allocate page\n", __func__);
6036 nfs4_free_pages(pages, size);
6044 static void nfs4_layoutget_release(void *calldata)
6046 struct nfs4_layoutget *lgp = calldata;
6047 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6048 size_t max_pages = max_response_pages(server);
6050 dprintk("--> %s\n", __func__);
6051 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6052 put_nfs_open_context(lgp->args.ctx);
6054 dprintk("<-- %s\n", __func__);
6057 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6058 .rpc_call_prepare = nfs4_layoutget_prepare,
6059 .rpc_call_done = nfs4_layoutget_done,
6060 .rpc_release = nfs4_layoutget_release,
6063 struct pnfs_layout_segment *
6064 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6066 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6067 size_t max_pages = max_response_pages(server);
6068 struct rpc_task *task;
6069 struct rpc_message msg = {
6070 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6071 .rpc_argp = &lgp->args,
6072 .rpc_resp = &lgp->res,
6074 struct rpc_task_setup task_setup_data = {
6075 .rpc_client = server->client,
6076 .rpc_message = &msg,
6077 .callback_ops = &nfs4_layoutget_call_ops,
6078 .callback_data = lgp,
6079 .flags = RPC_TASK_ASYNC,
6081 struct pnfs_layout_segment *lseg = NULL;
6084 dprintk("--> %s\n", __func__);
6086 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6087 if (!lgp->args.layout.pages) {
6088 nfs4_layoutget_release(lgp);
6089 return ERR_PTR(-ENOMEM);
6091 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6093 lgp->res.layoutp = &lgp->args.layout;
6094 lgp->res.seq_res.sr_slot = NULL;
6095 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6096 task = rpc_run_task(&task_setup_data);
6098 return ERR_CAST(task);
6099 status = nfs4_wait_for_completion_rpc_task(task);
6101 status = task->tk_status;
6103 lseg = pnfs_layout_process(lgp);
6105 dprintk("<-- %s status=%d\n", __func__, status);
6107 return ERR_PTR(status);
6112 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6114 struct nfs4_layoutreturn *lrp = calldata;
6116 dprintk("--> %s\n", __func__);
6117 nfs41_setup_sequence(lrp->clp->cl_session,
6118 &lrp->args.seq_args,
6123 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6125 struct nfs4_layoutreturn *lrp = calldata;
6126 struct nfs_server *server;
6128 dprintk("--> %s\n", __func__);
6130 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
6133 server = NFS_SERVER(lrp->args.inode);
6134 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6135 rpc_restart_call_prepare(task);
6138 dprintk("<-- %s\n", __func__);
6141 static void nfs4_layoutreturn_release(void *calldata)
6143 struct nfs4_layoutreturn *lrp = calldata;
6144 struct pnfs_layout_hdr *lo = lrp->args.layout;
6146 dprintk("--> %s\n", __func__);
6147 spin_lock(&lo->plh_inode->i_lock);
6148 if (lrp->res.lrs_present)
6149 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6150 lo->plh_block_lgets--;
6151 spin_unlock(&lo->plh_inode->i_lock);
6152 pnfs_put_layout_hdr(lrp->args.layout);
6154 dprintk("<-- %s\n", __func__);
6157 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6158 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6159 .rpc_call_done = nfs4_layoutreturn_done,
6160 .rpc_release = nfs4_layoutreturn_release,
6163 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6165 struct rpc_task *task;
6166 struct rpc_message msg = {
6167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6168 .rpc_argp = &lrp->args,
6169 .rpc_resp = &lrp->res,
6171 struct rpc_task_setup task_setup_data = {
6172 .rpc_client = lrp->clp->cl_rpcclient,
6173 .rpc_message = &msg,
6174 .callback_ops = &nfs4_layoutreturn_call_ops,
6175 .callback_data = lrp,
6179 dprintk("--> %s\n", __func__);
6180 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6181 task = rpc_run_task(&task_setup_data);
6183 return PTR_ERR(task);
6184 status = task->tk_status;
6185 dprintk("<-- %s status=%d\n", __func__, status);
6191 * Retrieve the list of Data Server devices from the MDS.
6193 static int _nfs4_getdevicelist(struct nfs_server *server,
6194 const struct nfs_fh *fh,
6195 struct pnfs_devicelist *devlist)
6197 struct nfs4_getdevicelist_args args = {
6199 .layoutclass = server->pnfs_curr_ld->id,
6201 struct nfs4_getdevicelist_res res = {
6204 struct rpc_message msg = {
6205 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6211 dprintk("--> %s\n", __func__);
6212 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6214 dprintk("<-- %s status=%d\n", __func__, status);
6218 int nfs4_proc_getdevicelist(struct nfs_server *server,
6219 const struct nfs_fh *fh,
6220 struct pnfs_devicelist *devlist)
6222 struct nfs4_exception exception = { };
6226 err = nfs4_handle_exception(server,
6227 _nfs4_getdevicelist(server, fh, devlist),
6229 } while (exception.retry);
6231 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6232 err, devlist->num_devs);
6236 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6239 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6241 struct nfs4_getdeviceinfo_args args = {
6244 struct nfs4_getdeviceinfo_res res = {
6247 struct rpc_message msg = {
6248 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6254 dprintk("--> %s\n", __func__);
6255 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6256 dprintk("<-- %s status=%d\n", __func__, status);
6261 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6263 struct nfs4_exception exception = { };
6267 err = nfs4_handle_exception(server,
6268 _nfs4_proc_getdeviceinfo(server, pdev),
6270 } while (exception.retry);
6273 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6275 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6277 struct nfs4_layoutcommit_data *data = calldata;
6278 struct nfs_server *server = NFS_SERVER(data->args.inode);
6279 struct nfs4_session *session = nfs4_get_session(server);
6281 nfs41_setup_sequence(session,
6282 &data->args.seq_args,
6288 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6290 struct nfs4_layoutcommit_data *data = calldata;
6291 struct nfs_server *server = NFS_SERVER(data->args.inode);
6293 if (!nfs41_sequence_done(task, &data->res.seq_res))
6296 switch (task->tk_status) { /* Just ignore these failures */
6297 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6298 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6299 case -NFS4ERR_BADLAYOUT: /* no layout */
6300 case -NFS4ERR_GRACE: /* loca_recalim always false */
6301 task->tk_status = 0;
6304 nfs_post_op_update_inode_force_wcc(data->args.inode,
6308 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6309 rpc_restart_call_prepare(task);
6315 static void nfs4_layoutcommit_release(void *calldata)
6317 struct nfs4_layoutcommit_data *data = calldata;
6318 struct pnfs_layout_segment *lseg, *tmp;
6319 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6321 pnfs_cleanup_layoutcommit(data);
6322 /* Matched by references in pnfs_set_layoutcommit */
6323 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6324 list_del_init(&lseg->pls_lc_list);
6325 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6327 pnfs_put_lseg(lseg);
6330 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6331 smp_mb__after_clear_bit();
6332 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6334 put_rpccred(data->cred);
6338 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6339 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6340 .rpc_call_done = nfs4_layoutcommit_done,
6341 .rpc_release = nfs4_layoutcommit_release,
6345 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6347 struct rpc_message msg = {
6348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6349 .rpc_argp = &data->args,
6350 .rpc_resp = &data->res,
6351 .rpc_cred = data->cred,
6353 struct rpc_task_setup task_setup_data = {
6354 .task = &data->task,
6355 .rpc_client = NFS_CLIENT(data->args.inode),
6356 .rpc_message = &msg,
6357 .callback_ops = &nfs4_layoutcommit_ops,
6358 .callback_data = data,
6359 .flags = RPC_TASK_ASYNC,
6361 struct rpc_task *task;
6364 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6365 "lbw: %llu inode %lu\n",
6366 data->task.tk_pid, sync,
6367 data->args.lastbytewritten,
6368 data->args.inode->i_ino);
6370 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6371 task = rpc_run_task(&task_setup_data);
6373 return PTR_ERR(task);
6376 status = nfs4_wait_for_completion_rpc_task(task);
6379 status = task->tk_status;
6381 dprintk("%s: status %d\n", __func__, status);
6387 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6388 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6390 struct nfs41_secinfo_no_name_args args = {
6391 .style = SECINFO_STYLE_CURRENT_FH,
6393 struct nfs4_secinfo_res res = {
6396 struct rpc_message msg = {
6397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6401 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6405 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6406 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6408 struct nfs4_exception exception = { };
6411 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6414 case -NFS4ERR_WRONGSEC:
6415 case -NFS4ERR_NOTSUPP:
6418 err = nfs4_handle_exception(server, err, &exception);
6420 } while (exception.retry);
6426 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6427 struct nfs_fsinfo *info)
6431 rpc_authflavor_t flavor;
6432 struct nfs4_secinfo_flavors *flavors;
6434 page = alloc_page(GFP_KERNEL);
6440 flavors = page_address(page);
6441 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6444 * Fall back on "guess and check" method if
6445 * the server doesn't support SECINFO_NO_NAME
6447 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6448 err = nfs4_find_root_sec(server, fhandle, info);
6454 flavor = nfs_find_best_sec(flavors);
6456 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6466 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6469 struct nfs41_test_stateid_args args = {
6472 struct nfs41_test_stateid_res res;
6473 struct rpc_message msg = {
6474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6479 dprintk("NFS call test_stateid %p\n", stateid);
6480 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6481 nfs4_set_sequence_privileged(&args.seq_args);
6482 status = nfs4_call_sync_sequence(server->client, server, &msg,
6483 &args.seq_args, &res.seq_res);
6484 if (status != NFS_OK) {
6485 dprintk("NFS reply test_stateid: failed, %d\n", status);
6488 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
6493 * nfs41_test_stateid - perform a TEST_STATEID operation
6495 * @server: server / transport on which to perform the operation
6496 * @stateid: state ID to test
6498 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6499 * Otherwise a negative NFS4ERR value is returned if the operation
6500 * failed or the state ID is not currently valid.
6502 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6504 struct nfs4_exception exception = { };
6507 err = _nfs41_test_stateid(server, stateid);
6508 if (err != -NFS4ERR_DELAY)
6510 nfs4_handle_exception(server, err, &exception);
6511 } while (exception.retry);
6515 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6517 struct nfs41_free_stateid_args args = {
6520 struct nfs41_free_stateid_res res;
6521 struct rpc_message msg = {
6522 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6528 dprintk("NFS call free_stateid %p\n", stateid);
6529 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6530 nfs4_set_sequence_privileged(&args.seq_args);
6531 status = nfs4_call_sync_sequence(server->client, server, &msg,
6532 &args.seq_args, &res.seq_res);
6533 dprintk("NFS reply free_stateid: %d\n", status);
6538 * nfs41_free_stateid - perform a FREE_STATEID operation
6540 * @server: server / transport on which to perform the operation
6541 * @stateid: state ID to release
6543 * Returns NFS_OK if the server freed "stateid". Otherwise a
6544 * negative NFS4ERR value is returned.
6546 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6548 struct nfs4_exception exception = { };
6551 err = _nfs4_free_stateid(server, stateid);
6552 if (err != -NFS4ERR_DELAY)
6554 nfs4_handle_exception(server, err, &exception);
6555 } while (exception.retry);
6559 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6560 const nfs4_stateid *s2)
6562 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6565 if (s1->seqid == s2->seqid)
6567 if (s1->seqid == 0 || s2->seqid == 0)
6573 #endif /* CONFIG_NFS_V4_1 */
6575 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6576 const nfs4_stateid *s2)
6578 return nfs4_stateid_match(s1, s2);
6582 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6583 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6584 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6585 .recover_open = nfs4_open_reclaim,
6586 .recover_lock = nfs4_lock_reclaim,
6587 .establish_clid = nfs4_init_clientid,
6588 .get_clid_cred = nfs4_get_setclientid_cred,
6589 .detect_trunking = nfs40_discover_server_trunking,
6592 #if defined(CONFIG_NFS_V4_1)
6593 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6594 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6595 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6596 .recover_open = nfs4_open_reclaim,
6597 .recover_lock = nfs4_lock_reclaim,
6598 .establish_clid = nfs41_init_clientid,
6599 .get_clid_cred = nfs4_get_exchange_id_cred,
6600 .reclaim_complete = nfs41_proc_reclaim_complete,
6601 .detect_trunking = nfs41_discover_server_trunking,
6603 #endif /* CONFIG_NFS_V4_1 */
6605 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6606 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6607 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6608 .recover_open = nfs4_open_expired,
6609 .recover_lock = nfs4_lock_expired,
6610 .establish_clid = nfs4_init_clientid,
6611 .get_clid_cred = nfs4_get_setclientid_cred,
6614 #if defined(CONFIG_NFS_V4_1)
6615 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6616 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6617 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6618 .recover_open = nfs41_open_expired,
6619 .recover_lock = nfs41_lock_expired,
6620 .establish_clid = nfs41_init_clientid,
6621 .get_clid_cred = nfs4_get_exchange_id_cred,
6623 #endif /* CONFIG_NFS_V4_1 */
6625 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6626 .sched_state_renewal = nfs4_proc_async_renew,
6627 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6628 .renew_lease = nfs4_proc_renew,
6631 #if defined(CONFIG_NFS_V4_1)
6632 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6633 .sched_state_renewal = nfs41_proc_async_sequence,
6634 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6635 .renew_lease = nfs4_proc_sequence,
6639 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6641 .call_sync = _nfs4_call_sync,
6642 .match_stateid = nfs4_match_stateid,
6643 .find_root_sec = nfs4_find_root_sec,
6644 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6645 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6646 .state_renewal_ops = &nfs40_state_renewal_ops,
6649 #if defined(CONFIG_NFS_V4_1)
6650 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6652 .call_sync = nfs4_call_sync_sequence,
6653 .match_stateid = nfs41_match_stateid,
6654 .find_root_sec = nfs41_find_root_sec,
6655 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6656 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6657 .state_renewal_ops = &nfs41_state_renewal_ops,
6661 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6662 [0] = &nfs_v4_0_minor_ops,
6663 #if defined(CONFIG_NFS_V4_1)
6664 [1] = &nfs_v4_1_minor_ops,
6668 const struct inode_operations nfs4_dir_inode_operations = {
6669 .create = nfs_create,
6670 .lookup = nfs_lookup,
6671 .atomic_open = nfs_atomic_open,
6673 .unlink = nfs_unlink,
6674 .symlink = nfs_symlink,
6678 .rename = nfs_rename,
6679 .permission = nfs_permission,
6680 .getattr = nfs_getattr,
6681 .setattr = nfs_setattr,
6682 .getxattr = generic_getxattr,
6683 .setxattr = generic_setxattr,
6684 .listxattr = generic_listxattr,
6685 .removexattr = generic_removexattr,
6688 static const struct inode_operations nfs4_file_inode_operations = {
6689 .permission = nfs_permission,
6690 .getattr = nfs_getattr,
6691 .setattr = nfs_setattr,
6692 .getxattr = generic_getxattr,
6693 .setxattr = generic_setxattr,
6694 .listxattr = generic_listxattr,
6695 .removexattr = generic_removexattr,
6698 const struct nfs_rpc_ops nfs_v4_clientops = {
6699 .version = 4, /* protocol version */
6700 .dentry_ops = &nfs4_dentry_operations,
6701 .dir_inode_ops = &nfs4_dir_inode_operations,
6702 .file_inode_ops = &nfs4_file_inode_operations,
6703 .file_ops = &nfs4_file_operations,
6704 .getroot = nfs4_proc_get_root,
6705 .submount = nfs4_submount,
6706 .try_mount = nfs4_try_mount,
6707 .getattr = nfs4_proc_getattr,
6708 .setattr = nfs4_proc_setattr,
6709 .lookup = nfs4_proc_lookup,
6710 .access = nfs4_proc_access,
6711 .readlink = nfs4_proc_readlink,
6712 .create = nfs4_proc_create,
6713 .remove = nfs4_proc_remove,
6714 .unlink_setup = nfs4_proc_unlink_setup,
6715 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
6716 .unlink_done = nfs4_proc_unlink_done,
6717 .rename = nfs4_proc_rename,
6718 .rename_setup = nfs4_proc_rename_setup,
6719 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
6720 .rename_done = nfs4_proc_rename_done,
6721 .link = nfs4_proc_link,
6722 .symlink = nfs4_proc_symlink,
6723 .mkdir = nfs4_proc_mkdir,
6724 .rmdir = nfs4_proc_remove,
6725 .readdir = nfs4_proc_readdir,
6726 .mknod = nfs4_proc_mknod,
6727 .statfs = nfs4_proc_statfs,
6728 .fsinfo = nfs4_proc_fsinfo,
6729 .pathconf = nfs4_proc_pathconf,
6730 .set_capabilities = nfs4_server_capabilities,
6731 .decode_dirent = nfs4_decode_dirent,
6732 .read_setup = nfs4_proc_read_setup,
6733 .read_pageio_init = pnfs_pageio_init_read,
6734 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
6735 .read_done = nfs4_read_done,
6736 .write_setup = nfs4_proc_write_setup,
6737 .write_pageio_init = pnfs_pageio_init_write,
6738 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6739 .write_done = nfs4_write_done,
6740 .commit_setup = nfs4_proc_commit_setup,
6741 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
6742 .commit_done = nfs4_commit_done,
6743 .lock = nfs4_proc_lock,
6744 .clear_acl_cache = nfs4_zap_acl_attr,
6745 .close_context = nfs4_close_context,
6746 .open_context = nfs4_atomic_open,
6747 .have_delegation = nfs4_have_delegation,
6748 .return_delegation = nfs4_inode_return_delegation,
6749 .alloc_client = nfs4_alloc_client,
6750 .init_client = nfs4_init_client,
6751 .free_client = nfs4_free_client,
6752 .create_server = nfs4_create_server,
6753 .clone_server = nfs_clone_server,
6756 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6757 .prefix = XATTR_NAME_NFSV4_ACL,
6758 .list = nfs4_xattr_list_nfs4_acl,
6759 .get = nfs4_xattr_get_nfs4_acl,
6760 .set = nfs4_xattr_set_nfs4_acl,
6763 const struct xattr_handler *nfs4_xattr_handlers[] = {
6764 &nfs4_xattr_nfs4_acl_handler,