4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/nfs.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs_fs.h>
49 #include <linux/nfs_page.h>
50 #include <linux/nfs_mount.h>
51 #include <linux/namei.h>
52 #include <linux/mount.h>
53 #include <linux/module.h>
54 #include <linux/nfs_idmap.h>
55 #include <linux/xattr.h>
56 #include <linux/utsname.h>
57 #include <linux/freezer.h>
60 #include "delegation.h"
66 #include "nfs4session.h"
69 #define NFSDBG_FACILITY NFSDBG_PROC
71 #define NFS4_POLL_RETRY_MIN (HZ/10)
72 #define NFS4_POLL_RETRY_MAX (15*HZ)
75 static int _nfs4_proc_open(struct nfs4_opendata *data);
76 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
77 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
78 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
79 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
80 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
81 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
82 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
83 struct nfs_fattr *fattr, struct iattr *sattr,
84 struct nfs4_state *state);
85 #ifdef CONFIG_NFS_V4_1
86 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
87 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
89 /* Prevent leaks of NFSv4 errors into userland */
90 static int nfs4_map_errors(int err)
95 case -NFS4ERR_RESOURCE:
96 case -NFS4ERR_LAYOUTTRYLATER:
97 case -NFS4ERR_RECALLCONFLICT:
99 case -NFS4ERR_WRONGSEC:
101 case -NFS4ERR_BADOWNER:
102 case -NFS4ERR_BADNAME:
104 case -NFS4ERR_SHARE_DENIED:
106 case -NFS4ERR_MINOR_VERS_MISMATCH:
107 return -EPROTONOSUPPORT;
108 case -NFS4ERR_ACCESS:
111 dprintk("%s could not handle NFSv4 error %d\n",
119 * This is our standard bitmap for GETATTR requests.
121 const u32 nfs4_fattr_bitmap[3] = {
123 | FATTR4_WORD0_CHANGE
126 | FATTR4_WORD0_FILEID,
128 | FATTR4_WORD1_NUMLINKS
130 | FATTR4_WORD1_OWNER_GROUP
131 | FATTR4_WORD1_RAWDEV
132 | FATTR4_WORD1_SPACE_USED
133 | FATTR4_WORD1_TIME_ACCESS
134 | FATTR4_WORD1_TIME_METADATA
135 | FATTR4_WORD1_TIME_MODIFY
138 static const u32 nfs4_pnfs_open_bitmap[3] = {
140 | FATTR4_WORD0_CHANGE
143 | FATTR4_WORD0_FILEID,
145 | FATTR4_WORD1_NUMLINKS
147 | FATTR4_WORD1_OWNER_GROUP
148 | FATTR4_WORD1_RAWDEV
149 | FATTR4_WORD1_SPACE_USED
150 | FATTR4_WORD1_TIME_ACCESS
151 | FATTR4_WORD1_TIME_METADATA
152 | FATTR4_WORD1_TIME_MODIFY,
153 FATTR4_WORD2_MDSTHRESHOLD
156 static const u32 nfs4_open_noattr_bitmap[3] = {
158 | FATTR4_WORD0_CHANGE
159 | FATTR4_WORD0_FILEID,
162 const u32 nfs4_statfs_bitmap[2] = {
163 FATTR4_WORD0_FILES_AVAIL
164 | FATTR4_WORD0_FILES_FREE
165 | FATTR4_WORD0_FILES_TOTAL,
166 FATTR4_WORD1_SPACE_AVAIL
167 | FATTR4_WORD1_SPACE_FREE
168 | FATTR4_WORD1_SPACE_TOTAL
171 const u32 nfs4_pathconf_bitmap[2] = {
173 | FATTR4_WORD0_MAXNAME,
177 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
178 | FATTR4_WORD0_MAXREAD
179 | FATTR4_WORD0_MAXWRITE
180 | FATTR4_WORD0_LEASE_TIME,
181 FATTR4_WORD1_TIME_DELTA
182 | FATTR4_WORD1_FS_LAYOUT_TYPES,
183 FATTR4_WORD2_LAYOUT_BLKSIZE
186 const u32 nfs4_fs_locations_bitmap[2] = {
188 | FATTR4_WORD0_CHANGE
191 | FATTR4_WORD0_FILEID
192 | FATTR4_WORD0_FS_LOCATIONS,
194 | FATTR4_WORD1_NUMLINKS
196 | FATTR4_WORD1_OWNER_GROUP
197 | FATTR4_WORD1_RAWDEV
198 | FATTR4_WORD1_SPACE_USED
199 | FATTR4_WORD1_TIME_ACCESS
200 | FATTR4_WORD1_TIME_METADATA
201 | FATTR4_WORD1_TIME_MODIFY
202 | FATTR4_WORD1_MOUNTED_ON_FILEID
205 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
206 struct nfs4_readdir_arg *readdir)
211 readdir->cookie = cookie;
212 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
217 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
222 * NFSv4 servers do not return entries for '.' and '..'
223 * Therefore, we fake these entries here. We let '.'
224 * have cookie 0 and '..' have cookie 1. Note that
225 * when talking to the server, we always send cookie 0
228 start = p = kmap_atomic(*readdir->pages);
231 *p++ = xdr_one; /* next */
232 *p++ = xdr_zero; /* cookie, first word */
233 *p++ = xdr_one; /* cookie, second word */
234 *p++ = xdr_one; /* entry len */
235 memcpy(p, ".\0\0\0", 4); /* entry */
237 *p++ = xdr_one; /* bitmap length */
238 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
239 *p++ = htonl(8); /* attribute buffer length */
240 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
243 *p++ = xdr_one; /* next */
244 *p++ = xdr_zero; /* cookie, first word */
245 *p++ = xdr_two; /* cookie, second word */
246 *p++ = xdr_two; /* entry len */
247 memcpy(p, "..\0\0", 4); /* entry */
249 *p++ = xdr_one; /* bitmap length */
250 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
251 *p++ = htonl(8); /* attribute buffer length */
252 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
254 readdir->pgbase = (char *)p - (char *)start;
255 readdir->count -= readdir->pgbase;
256 kunmap_atomic(start);
259 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
266 *timeout = NFS4_POLL_RETRY_MIN;
267 if (*timeout > NFS4_POLL_RETRY_MAX)
268 *timeout = NFS4_POLL_RETRY_MAX;
269 freezable_schedule_timeout_killable(*timeout);
270 if (fatal_signal_pending(current))
276 /* This is the error handling routine for processes that are allowed
279 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
281 struct nfs_client *clp = server->nfs_client;
282 struct nfs4_state *state = exception->state;
283 struct inode *inode = exception->inode;
286 exception->retry = 0;
290 case -NFS4ERR_OPENMODE:
291 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
292 nfs4_inode_return_delegation(inode);
293 exception->retry = 1;
298 nfs4_schedule_stateid_recovery(server, state);
299 goto wait_on_recovery;
300 case -NFS4ERR_DELEG_REVOKED:
301 case -NFS4ERR_ADMIN_REVOKED:
302 case -NFS4ERR_BAD_STATEID:
305 nfs_remove_bad_delegation(state->inode);
306 nfs4_schedule_stateid_recovery(server, state);
307 goto wait_on_recovery;
308 case -NFS4ERR_EXPIRED:
310 nfs4_schedule_stateid_recovery(server, state);
311 case -NFS4ERR_STALE_STATEID:
312 case -NFS4ERR_STALE_CLIENTID:
313 nfs4_schedule_lease_recovery(clp);
314 goto wait_on_recovery;
315 #if defined(CONFIG_NFS_V4_1)
316 case -NFS4ERR_BADSESSION:
317 case -NFS4ERR_BADSLOT:
318 case -NFS4ERR_BAD_HIGH_SLOT:
319 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
320 case -NFS4ERR_DEADSESSION:
321 case -NFS4ERR_SEQ_FALSE_RETRY:
322 case -NFS4ERR_SEQ_MISORDERED:
323 dprintk("%s ERROR: %d Reset session\n", __func__,
325 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
326 goto wait_on_recovery;
327 #endif /* defined(CONFIG_NFS_V4_1) */
328 case -NFS4ERR_FILE_OPEN:
329 if (exception->timeout > HZ) {
330 /* We have retried a decent amount, time to
338 ret = nfs4_delay(server->client, &exception->timeout);
341 case -NFS4ERR_RETRY_UNCACHED_REP:
342 case -NFS4ERR_OLD_STATEID:
343 exception->retry = 1;
345 case -NFS4ERR_BADOWNER:
346 /* The following works around a Linux server bug! */
347 case -NFS4ERR_BADNAME:
348 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
349 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
350 exception->retry = 1;
351 printk(KERN_WARNING "NFS: v4 server %s "
352 "does not accept raw "
354 "Reenabling the idmapper.\n",
355 server->nfs_client->cl_hostname);
358 /* We failed to handle the error */
359 return nfs4_map_errors(ret);
361 ret = nfs4_wait_clnt_recover(clp);
363 exception->retry = 1;
368 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
370 spin_lock(&clp->cl_lock);
371 if (time_before(clp->cl_last_renewal,timestamp))
372 clp->cl_last_renewal = timestamp;
373 spin_unlock(&clp->cl_lock);
376 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
378 do_renew_lease(server->nfs_client, timestamp);
381 #if defined(CONFIG_NFS_V4_1)
383 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
385 struct nfs4_session *session;
386 struct nfs4_slot_table *tbl;
387 bool send_new_highest_used_slotid = false;
390 /* just wake up the next guy waiting since
391 * we may have not consumed a slot after all */
392 dprintk("%s: No slot\n", __func__);
395 tbl = res->sr_slot->table;
396 session = tbl->session;
398 spin_lock(&tbl->slot_tbl_lock);
399 /* Be nice to the server: try to ensure that the last transmitted
400 * value for highest_user_slotid <= target_highest_slotid
402 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
403 send_new_highest_used_slotid = true;
405 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
406 send_new_highest_used_slotid = false;
409 nfs4_free_slot(tbl, res->sr_slot);
411 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
412 send_new_highest_used_slotid = false;
414 spin_unlock(&tbl->slot_tbl_lock);
416 if (send_new_highest_used_slotid)
417 nfs41_server_notify_highest_slotid_update(session->clp);
420 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
422 struct nfs4_session *session;
423 struct nfs4_slot *slot;
424 struct nfs_client *clp;
425 bool interrupted = false;
428 /* don't increment the sequence number if the task wasn't sent */
429 if (!RPC_WAS_SENT(task))
433 session = slot->table->session;
435 if (slot->interrupted) {
436 slot->interrupted = 0;
440 /* Check the SEQUENCE operation status */
441 switch (res->sr_status) {
443 /* Update the slot's sequence and clientid lease timer */
446 do_renew_lease(clp, res->sr_timestamp);
447 /* Check sequence flags */
448 if (res->sr_status_flags != 0)
449 nfs4_schedule_lease_recovery(clp);
450 nfs41_update_target_slotid(slot->table, slot, res);
454 * sr_status remains 1 if an RPC level error occurred.
455 * The server may or may not have processed the sequence
457 * Mark the slot as having hosted an interrupted RPC call.
459 slot->interrupted = 1;
462 /* The server detected a resend of the RPC call and
463 * returned NFS4ERR_DELAY as per Section 2.10.6.2
466 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
471 case -NFS4ERR_BADSLOT:
473 * The slot id we used was probably retired. Try again
474 * using a different slot id.
477 case -NFS4ERR_SEQ_MISORDERED:
479 * Was the last operation on this sequence interrupted?
480 * If so, retry after bumping the sequence number.
487 * Could this slot have been previously retired?
488 * If so, then the server may be expecting seq_nr = 1!
490 if (slot->seq_nr != 1) {
495 case -NFS4ERR_SEQ_FALSE_RETRY:
499 /* Just update the slot sequence no. */
503 /* The session may be reset by one of the error handlers. */
504 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
505 nfs41_sequence_free_slot(res);
508 if (rpc_restart_call_prepare(task)) {
514 if (!rpc_restart_call(task))
516 rpc_delay(task, NFS4_POLL_RETRY_MAX);
520 static int nfs4_sequence_done(struct rpc_task *task,
521 struct nfs4_sequence_res *res)
523 if (res->sr_slot == NULL)
525 return nfs41_sequence_done(task, res);
528 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
529 struct nfs4_sequence_res *res, int cache_reply)
531 args->sa_slot = NULL;
532 args->sa_cache_this = 0;
533 args->sa_privileged = 0;
535 args->sa_cache_this = 1;
539 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
541 args->sa_privileged = 1;
544 int nfs41_setup_sequence(struct nfs4_session *session,
545 struct nfs4_sequence_args *args,
546 struct nfs4_sequence_res *res,
547 struct rpc_task *task)
549 struct nfs4_slot *slot;
550 struct nfs4_slot_table *tbl;
552 dprintk("--> %s\n", __func__);
553 /* slot already allocated? */
554 if (res->sr_slot != NULL)
557 tbl = &session->fc_slot_table;
559 task->tk_timeout = 0;
561 spin_lock(&tbl->slot_tbl_lock);
562 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
563 !args->sa_privileged) {
564 /* The state manager will wait until the slot table is empty */
565 dprintk("%s session is draining\n", __func__);
569 slot = nfs4_alloc_slot(tbl);
571 /* If out of memory, try again in 1/4 second */
572 if (slot == ERR_PTR(-ENOMEM))
573 task->tk_timeout = HZ >> 2;
574 dprintk("<-- %s: no free slots\n", __func__);
577 spin_unlock(&tbl->slot_tbl_lock);
579 args->sa_slot = slot;
581 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
582 slot->slot_nr, slot->seq_nr);
585 res->sr_timestamp = jiffies;
586 res->sr_status_flags = 0;
588 * sr_status is only set in decode_sequence, and so will remain
589 * set to 1 if an rpc level failure occurs.
593 rpc_call_start(task);
596 /* Privileged tasks are queued with top priority */
597 if (args->sa_privileged)
598 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
599 NULL, RPC_PRIORITY_PRIVILEGED);
601 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
602 spin_unlock(&tbl->slot_tbl_lock);
605 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
607 int nfs4_setup_sequence(const struct nfs_server *server,
608 struct nfs4_sequence_args *args,
609 struct nfs4_sequence_res *res,
610 struct rpc_task *task)
612 struct nfs4_session *session = nfs4_get_session(server);
615 if (session == NULL) {
616 rpc_call_start(task);
620 dprintk("--> %s clp %p session %p sr_slot %d\n",
621 __func__, session->clp, session, res->sr_slot ?
622 res->sr_slot->slot_nr : -1);
624 ret = nfs41_setup_sequence(session, args, res, task);
626 dprintk("<-- %s status=%d\n", __func__, ret);
630 struct nfs41_call_sync_data {
631 const struct nfs_server *seq_server;
632 struct nfs4_sequence_args *seq_args;
633 struct nfs4_sequence_res *seq_res;
636 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
638 struct nfs41_call_sync_data *data = calldata;
639 struct nfs4_session *session = nfs4_get_session(data->seq_server);
641 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
643 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
646 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
648 struct nfs41_call_sync_data *data = calldata;
650 nfs41_sequence_done(task, data->seq_res);
653 static const struct rpc_call_ops nfs41_call_sync_ops = {
654 .rpc_call_prepare = nfs41_call_sync_prepare,
655 .rpc_call_done = nfs41_call_sync_done,
658 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
659 struct nfs_server *server,
660 struct rpc_message *msg,
661 struct nfs4_sequence_args *args,
662 struct nfs4_sequence_res *res)
665 struct rpc_task *task;
666 struct nfs41_call_sync_data data = {
667 .seq_server = server,
671 struct rpc_task_setup task_setup = {
674 .callback_ops = &nfs41_call_sync_ops,
675 .callback_data = &data
678 task = rpc_run_task(&task_setup);
682 ret = task->tk_status;
690 void nfs41_init_sequence(struct nfs4_sequence_args *args,
691 struct nfs4_sequence_res *res, int cache_reply)
695 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
700 static int nfs4_sequence_done(struct rpc_task *task,
701 struct nfs4_sequence_res *res)
705 #endif /* CONFIG_NFS_V4_1 */
708 int _nfs4_call_sync(struct rpc_clnt *clnt,
709 struct nfs_server *server,
710 struct rpc_message *msg,
711 struct nfs4_sequence_args *args,
712 struct nfs4_sequence_res *res)
714 return rpc_call_sync(clnt, msg, 0);
718 int nfs4_call_sync(struct rpc_clnt *clnt,
719 struct nfs_server *server,
720 struct rpc_message *msg,
721 struct nfs4_sequence_args *args,
722 struct nfs4_sequence_res *res,
725 nfs41_init_sequence(args, res, cache_reply);
726 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
730 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
732 struct nfs_inode *nfsi = NFS_I(dir);
734 spin_lock(&dir->i_lock);
735 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
736 if (!cinfo->atomic || cinfo->before != dir->i_version)
737 nfs_force_lookup_revalidate(dir);
738 dir->i_version = cinfo->after;
739 nfs_fscache_invalidate(dir);
740 spin_unlock(&dir->i_lock);
743 struct nfs4_opendata {
745 struct nfs_openargs o_arg;
746 struct nfs_openres o_res;
747 struct nfs_open_confirmargs c_arg;
748 struct nfs_open_confirmres c_res;
749 struct nfs4_string owner_name;
750 struct nfs4_string group_name;
751 struct nfs_fattr f_attr;
753 struct dentry *dentry;
754 struct nfs4_state_owner *owner;
755 struct nfs4_state *state;
757 unsigned long timestamp;
758 unsigned int rpc_done : 1;
764 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
766 p->o_res.f_attr = &p->f_attr;
767 p->o_res.seqid = p->o_arg.seqid;
768 p->c_res.seqid = p->c_arg.seqid;
769 p->o_res.server = p->o_arg.server;
770 p->o_res.access_request = p->o_arg.access;
771 nfs_fattr_init(&p->f_attr);
772 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
775 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
776 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
777 const struct iattr *attrs,
780 struct dentry *parent = dget_parent(dentry);
781 struct inode *dir = parent->d_inode;
782 struct nfs_server *server = NFS_SERVER(dir);
783 struct nfs4_opendata *p;
785 p = kzalloc(sizeof(*p), gfp_mask);
788 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
789 if (p->o_arg.seqid == NULL)
791 nfs_sb_active(dentry->d_sb);
792 p->dentry = dget(dentry);
795 atomic_inc(&sp->so_count);
796 p->o_arg.fh = NFS_FH(dir);
797 p->o_arg.open_flags = flags;
798 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
799 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
800 * will return permission denied for all bits until close */
801 if (!(flags & O_EXCL)) {
802 /* ask server to check for all possible rights as results
804 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
805 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
807 p->o_arg.clientid = server->nfs_client->cl_clientid;
808 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
809 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
810 p->o_arg.name = &dentry->d_name;
811 p->o_arg.server = server;
812 p->o_arg.bitmask = server->attr_bitmask;
813 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
814 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
815 if (attrs != NULL && attrs->ia_valid != 0) {
818 p->o_arg.u.attrs = &p->attrs;
819 memcpy(&p->attrs, attrs, sizeof(p->attrs));
822 verf[1] = current->pid;
823 memcpy(p->o_arg.u.verifier.data, verf,
824 sizeof(p->o_arg.u.verifier.data));
826 p->c_arg.fh = &p->o_res.fh;
827 p->c_arg.stateid = &p->o_res.stateid;
828 p->c_arg.seqid = p->o_arg.seqid;
829 nfs4_init_opendata_res(p);
839 static void nfs4_opendata_free(struct kref *kref)
841 struct nfs4_opendata *p = container_of(kref,
842 struct nfs4_opendata, kref);
843 struct super_block *sb = p->dentry->d_sb;
845 nfs_free_seqid(p->o_arg.seqid);
846 if (p->state != NULL)
847 nfs4_put_open_state(p->state);
848 nfs4_put_state_owner(p->owner);
852 nfs_fattr_free_names(&p->f_attr);
856 static void nfs4_opendata_put(struct nfs4_opendata *p)
859 kref_put(&p->kref, nfs4_opendata_free);
862 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
866 ret = rpc_wait_for_completion_task(task);
870 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
874 if (open_mode & (O_EXCL|O_TRUNC))
876 switch (mode & (FMODE_READ|FMODE_WRITE)) {
878 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
879 && state->n_rdonly != 0;
882 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
883 && state->n_wronly != 0;
885 case FMODE_READ|FMODE_WRITE:
886 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
887 && state->n_rdwr != 0;
893 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
895 if (delegation == NULL)
897 if ((delegation->type & fmode) != fmode)
899 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
901 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
903 nfs_mark_delegation_referenced(delegation);
907 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
916 case FMODE_READ|FMODE_WRITE:
919 nfs4_state_set_mode_locked(state, state->state | fmode);
922 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
924 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
925 nfs4_stateid_copy(&state->stateid, stateid);
926 nfs4_stateid_copy(&state->open_stateid, stateid);
929 set_bit(NFS_O_RDONLY_STATE, &state->flags);
932 set_bit(NFS_O_WRONLY_STATE, &state->flags);
934 case FMODE_READ|FMODE_WRITE:
935 set_bit(NFS_O_RDWR_STATE, &state->flags);
939 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
941 write_seqlock(&state->seqlock);
942 nfs_set_open_stateid_locked(state, stateid, fmode);
943 write_sequnlock(&state->seqlock);
946 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
949 * Protect the call to nfs4_state_set_mode_locked and
950 * serialise the stateid update
952 write_seqlock(&state->seqlock);
953 if (deleg_stateid != NULL) {
954 nfs4_stateid_copy(&state->stateid, deleg_stateid);
955 set_bit(NFS_DELEGATED_STATE, &state->flags);
957 if (open_stateid != NULL)
958 nfs_set_open_stateid_locked(state, open_stateid, fmode);
959 write_sequnlock(&state->seqlock);
960 spin_lock(&state->owner->so_lock);
961 update_open_stateflags(state, fmode);
962 spin_unlock(&state->owner->so_lock);
965 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
967 struct nfs_inode *nfsi = NFS_I(state->inode);
968 struct nfs_delegation *deleg_cur;
971 fmode &= (FMODE_READ|FMODE_WRITE);
974 deleg_cur = rcu_dereference(nfsi->delegation);
975 if (deleg_cur == NULL)
978 spin_lock(&deleg_cur->lock);
979 if (nfsi->delegation != deleg_cur ||
980 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
981 (deleg_cur->type & fmode) != fmode)
982 goto no_delegation_unlock;
984 if (delegation == NULL)
985 delegation = &deleg_cur->stateid;
986 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
987 goto no_delegation_unlock;
989 nfs_mark_delegation_referenced(deleg_cur);
990 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
992 no_delegation_unlock:
993 spin_unlock(&deleg_cur->lock);
997 if (!ret && open_stateid != NULL) {
998 __update_open_stateid(state, open_stateid, NULL, fmode);
1006 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1008 struct nfs_delegation *delegation;
1011 delegation = rcu_dereference(NFS_I(inode)->delegation);
1012 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1017 nfs4_inode_return_delegation(inode);
1020 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1022 struct nfs4_state *state = opendata->state;
1023 struct nfs_inode *nfsi = NFS_I(state->inode);
1024 struct nfs_delegation *delegation;
1025 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1026 fmode_t fmode = opendata->o_arg.fmode;
1027 nfs4_stateid stateid;
1031 if (can_open_cached(state, fmode, open_mode)) {
1032 spin_lock(&state->owner->so_lock);
1033 if (can_open_cached(state, fmode, open_mode)) {
1034 update_open_stateflags(state, fmode);
1035 spin_unlock(&state->owner->so_lock);
1036 goto out_return_state;
1038 spin_unlock(&state->owner->so_lock);
1041 delegation = rcu_dereference(nfsi->delegation);
1042 if (!can_open_delegated(delegation, fmode)) {
1046 /* Save the delegation */
1047 nfs4_stateid_copy(&stateid, &delegation->stateid);
1049 nfs_release_seqid(opendata->o_arg.seqid);
1050 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1055 /* Try to update the stateid using the delegation */
1056 if (update_open_stateid(state, NULL, &stateid, fmode))
1057 goto out_return_state;
1060 return ERR_PTR(ret);
1062 atomic_inc(&state->count);
1067 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1069 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1070 struct nfs_delegation *delegation;
1071 int delegation_flags = 0;
1074 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1076 delegation_flags = delegation->flags;
1078 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1079 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1080 "returning a delegation for "
1081 "OPEN(CLAIM_DELEGATE_CUR)\n",
1083 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1084 nfs_inode_set_delegation(state->inode,
1085 data->owner->so_cred,
1088 nfs_inode_reclaim_delegation(state->inode,
1089 data->owner->so_cred,
1094 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1095 * and update the nfs4_state.
1097 static struct nfs4_state *
1098 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1100 struct inode *inode = data->state->inode;
1101 struct nfs4_state *state = data->state;
1104 if (!data->rpc_done) {
1105 ret = data->rpc_status;
1110 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1111 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1112 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1116 state = nfs4_get_open_state(inode, data->owner);
1120 ret = nfs_refresh_inode(inode, &data->f_attr);
1124 if (data->o_res.delegation_type != 0)
1125 nfs4_opendata_check_deleg(data, state);
1126 update_open_stateid(state, &data->o_res.stateid, NULL,
1131 return ERR_PTR(ret);
1135 static struct nfs4_state *
1136 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1138 struct inode *inode;
1139 struct nfs4_state *state = NULL;
1142 if (!data->rpc_done) {
1143 state = nfs4_try_open_cached(data);
1148 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1150 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1151 ret = PTR_ERR(inode);
1155 state = nfs4_get_open_state(inode, data->owner);
1158 if (data->o_res.delegation_type != 0)
1159 nfs4_opendata_check_deleg(data, state);
1160 update_open_stateid(state, &data->o_res.stateid, NULL,
1164 nfs_release_seqid(data->o_arg.seqid);
1169 return ERR_PTR(ret);
1172 static struct nfs4_state *
1173 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1175 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1176 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1177 return _nfs4_opendata_to_nfs4_state(data);
1180 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1182 struct nfs_inode *nfsi = NFS_I(state->inode);
1183 struct nfs_open_context *ctx;
1185 spin_lock(&state->inode->i_lock);
1186 list_for_each_entry(ctx, &nfsi->open_files, list) {
1187 if (ctx->state != state)
1189 get_nfs_open_context(ctx);
1190 spin_unlock(&state->inode->i_lock);
1193 spin_unlock(&state->inode->i_lock);
1194 return ERR_PTR(-ENOENT);
1197 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1199 struct nfs4_opendata *opendata;
1201 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1202 if (opendata == NULL)
1203 return ERR_PTR(-ENOMEM);
1204 opendata->state = state;
1205 atomic_inc(&state->count);
1209 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1211 struct nfs4_state *newstate;
1214 opendata->o_arg.open_flags = 0;
1215 opendata->o_arg.fmode = fmode;
1216 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1217 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1218 nfs4_init_opendata_res(opendata);
1219 ret = _nfs4_recover_proc_open(opendata);
1222 newstate = nfs4_opendata_to_nfs4_state(opendata);
1223 if (IS_ERR(newstate))
1224 return PTR_ERR(newstate);
1225 nfs4_close_state(newstate, fmode);
1230 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1232 struct nfs4_state *newstate;
1235 /* memory barrier prior to reading state->n_* */
1236 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1238 if (state->n_rdwr != 0) {
1239 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1240 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1243 if (newstate != state)
1246 if (state->n_wronly != 0) {
1247 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1248 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1251 if (newstate != state)
1254 if (state->n_rdonly != 0) {
1255 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1256 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1259 if (newstate != state)
1263 * We may have performed cached opens for all three recoveries.
1264 * Check if we need to update the current stateid.
1266 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1267 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1268 write_seqlock(&state->seqlock);
1269 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1270 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1271 write_sequnlock(&state->seqlock);
1278 * reclaim state on the server after a reboot.
1280 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1282 struct nfs_delegation *delegation;
1283 struct nfs4_opendata *opendata;
1284 fmode_t delegation_type = 0;
1287 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1288 if (IS_ERR(opendata))
1289 return PTR_ERR(opendata);
1290 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1291 opendata->o_arg.fh = NFS_FH(state->inode);
1293 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1294 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1295 delegation_type = delegation->type;
1297 opendata->o_arg.u.delegation_type = delegation_type;
1298 status = nfs4_open_recover(opendata, state);
1299 nfs4_opendata_put(opendata);
1303 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1305 struct nfs_server *server = NFS_SERVER(state->inode);
1306 struct nfs4_exception exception = { };
1309 err = _nfs4_do_open_reclaim(ctx, state);
1310 if (err != -NFS4ERR_DELAY)
1312 nfs4_handle_exception(server, err, &exception);
1313 } while (exception.retry);
1317 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1319 struct nfs_open_context *ctx;
1322 ctx = nfs4_state_find_open_context(state);
1324 return PTR_ERR(ctx);
1325 ret = nfs4_do_open_reclaim(ctx, state);
1326 put_nfs_open_context(ctx);
1330 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1332 struct nfs4_opendata *opendata;
1335 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1336 if (IS_ERR(opendata))
1337 return PTR_ERR(opendata);
1338 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1339 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1340 ret = nfs4_open_recover(opendata, state);
1341 nfs4_opendata_put(opendata);
1345 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1347 struct nfs4_exception exception = { };
1348 struct nfs_server *server = NFS_SERVER(state->inode);
1351 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1357 case -NFS4ERR_BADSESSION:
1358 case -NFS4ERR_BADSLOT:
1359 case -NFS4ERR_BAD_HIGH_SLOT:
1360 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1361 case -NFS4ERR_DEADSESSION:
1362 set_bit(NFS_DELEGATED_STATE, &state->flags);
1363 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1366 case -NFS4ERR_STALE_CLIENTID:
1367 case -NFS4ERR_STALE_STATEID:
1368 set_bit(NFS_DELEGATED_STATE, &state->flags);
1369 case -NFS4ERR_EXPIRED:
1370 /* Don't recall a delegation if it was lost */
1371 nfs4_schedule_lease_recovery(server->nfs_client);
1374 case -NFS4ERR_DELEG_REVOKED:
1375 case -NFS4ERR_ADMIN_REVOKED:
1376 case -NFS4ERR_BAD_STATEID:
1377 nfs_inode_find_state_and_recover(state->inode,
1379 nfs4_schedule_stateid_recovery(server, state);
1384 set_bit(NFS_DELEGATED_STATE, &state->flags);
1385 err = nfs4_handle_exception(server, err, &exception);
1386 } while (exception.retry);
1391 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1393 struct nfs4_opendata *data = calldata;
1395 data->rpc_status = task->tk_status;
1396 if (data->rpc_status == 0) {
1397 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1398 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1399 renew_lease(data->o_res.server, data->timestamp);
1404 static void nfs4_open_confirm_release(void *calldata)
1406 struct nfs4_opendata *data = calldata;
1407 struct nfs4_state *state = NULL;
1409 /* If this request hasn't been cancelled, do nothing */
1410 if (data->cancelled == 0)
1412 /* In case of error, no cleanup! */
1413 if (!data->rpc_done)
1415 state = nfs4_opendata_to_nfs4_state(data);
1417 nfs4_close_state(state, data->o_arg.fmode);
1419 nfs4_opendata_put(data);
1422 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1423 .rpc_call_done = nfs4_open_confirm_done,
1424 .rpc_release = nfs4_open_confirm_release,
1428 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1430 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1432 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1433 struct rpc_task *task;
1434 struct rpc_message msg = {
1435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1436 .rpc_argp = &data->c_arg,
1437 .rpc_resp = &data->c_res,
1438 .rpc_cred = data->owner->so_cred,
1440 struct rpc_task_setup task_setup_data = {
1441 .rpc_client = server->client,
1442 .rpc_message = &msg,
1443 .callback_ops = &nfs4_open_confirm_ops,
1444 .callback_data = data,
1445 .workqueue = nfsiod_workqueue,
1446 .flags = RPC_TASK_ASYNC,
1450 kref_get(&data->kref);
1452 data->rpc_status = 0;
1453 data->timestamp = jiffies;
1454 task = rpc_run_task(&task_setup_data);
1456 return PTR_ERR(task);
1457 status = nfs4_wait_for_completion_rpc_task(task);
1459 data->cancelled = 1;
1462 status = data->rpc_status;
1467 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1469 struct nfs4_opendata *data = calldata;
1470 struct nfs4_state_owner *sp = data->owner;
1472 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1475 * Check if we still need to send an OPEN call, or if we can use
1476 * a delegation instead.
1478 if (data->state != NULL) {
1479 struct nfs_delegation *delegation;
1481 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1484 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1485 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1486 can_open_delegated(delegation, data->o_arg.fmode))
1487 goto unlock_no_action;
1490 /* Update client id. */
1491 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1492 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1493 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1494 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1495 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1497 data->timestamp = jiffies;
1498 if (nfs4_setup_sequence(data->o_arg.server,
1499 &data->o_arg.seq_args,
1500 &data->o_res.seq_res,
1502 nfs_release_seqid(data->o_arg.seqid);
1507 task->tk_action = NULL;
1509 nfs4_sequence_done(task, &data->o_res.seq_res);
1512 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1514 struct nfs4_opendata *data = calldata;
1516 data->rpc_status = task->tk_status;
1518 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1521 if (task->tk_status == 0) {
1522 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1523 switch (data->o_res.f_attr->mode & S_IFMT) {
1527 data->rpc_status = -ELOOP;
1530 data->rpc_status = -EISDIR;
1533 data->rpc_status = -ENOTDIR;
1536 renew_lease(data->o_res.server, data->timestamp);
1537 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1538 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1543 static void nfs4_open_release(void *calldata)
1545 struct nfs4_opendata *data = calldata;
1546 struct nfs4_state *state = NULL;
1548 /* If this request hasn't been cancelled, do nothing */
1549 if (data->cancelled == 0)
1551 /* In case of error, no cleanup! */
1552 if (data->rpc_status != 0 || !data->rpc_done)
1554 /* In case we need an open_confirm, no cleanup! */
1555 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1557 state = nfs4_opendata_to_nfs4_state(data);
1559 nfs4_close_state(state, data->o_arg.fmode);
1561 nfs4_opendata_put(data);
1564 static const struct rpc_call_ops nfs4_open_ops = {
1565 .rpc_call_prepare = nfs4_open_prepare,
1566 .rpc_call_done = nfs4_open_done,
1567 .rpc_release = nfs4_open_release,
1570 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1572 struct inode *dir = data->dir->d_inode;
1573 struct nfs_server *server = NFS_SERVER(dir);
1574 struct nfs_openargs *o_arg = &data->o_arg;
1575 struct nfs_openres *o_res = &data->o_res;
1576 struct rpc_task *task;
1577 struct rpc_message msg = {
1578 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1581 .rpc_cred = data->owner->so_cred,
1583 struct rpc_task_setup task_setup_data = {
1584 .rpc_client = server->client,
1585 .rpc_message = &msg,
1586 .callback_ops = &nfs4_open_ops,
1587 .callback_data = data,
1588 .workqueue = nfsiod_workqueue,
1589 .flags = RPC_TASK_ASYNC,
1593 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1594 kref_get(&data->kref);
1596 data->rpc_status = 0;
1597 data->cancelled = 0;
1599 nfs4_set_sequence_privileged(&o_arg->seq_args);
1600 task = rpc_run_task(&task_setup_data);
1602 return PTR_ERR(task);
1603 status = nfs4_wait_for_completion_rpc_task(task);
1605 data->cancelled = 1;
1608 status = data->rpc_status;
1614 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1616 struct inode *dir = data->dir->d_inode;
1617 struct nfs_openres *o_res = &data->o_res;
1620 status = nfs4_run_open_task(data, 1);
1621 if (status != 0 || !data->rpc_done)
1624 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1626 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1627 status = _nfs4_proc_open_confirm(data);
1635 static int nfs4_opendata_access(struct rpc_cred *cred,
1636 struct nfs4_opendata *opendata,
1637 struct nfs4_state *state, fmode_t fmode,
1640 struct nfs_access_entry cache;
1643 /* access call failed or for some reason the server doesn't
1644 * support any access modes -- defer access call until later */
1645 if (opendata->o_res.access_supported == 0)
1649 /* don't check MAY_WRITE - a newly created file may not have
1650 * write mode bits, but POSIX allows the creating process to write.
1651 * use openflags to check for exec, because fmode won't
1652 * always have FMODE_EXEC set when file open for exec. */
1653 if (openflags & __FMODE_EXEC) {
1654 /* ONLY check for exec rights */
1656 } else if (fmode & FMODE_READ)
1660 cache.jiffies = jiffies;
1661 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1662 nfs_access_add_cache(state->inode, &cache);
1664 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
1667 /* even though OPEN succeeded, access is denied. Close the file */
1668 nfs4_close_state(state, fmode);
1673 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1675 static int _nfs4_proc_open(struct nfs4_opendata *data)
1677 struct inode *dir = data->dir->d_inode;
1678 struct nfs_server *server = NFS_SERVER(dir);
1679 struct nfs_openargs *o_arg = &data->o_arg;
1680 struct nfs_openres *o_res = &data->o_res;
1683 status = nfs4_run_open_task(data, 0);
1684 if (!data->rpc_done)
1687 if (status == -NFS4ERR_BADNAME &&
1688 !(o_arg->open_flags & O_CREAT))
1693 nfs_fattr_map_and_free_names(server, &data->f_attr);
1695 if (o_arg->open_flags & O_CREAT)
1696 update_changeattr(dir, &o_res->cinfo);
1697 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1698 server->caps &= ~NFS_CAP_POSIX_LOCK;
1699 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1700 status = _nfs4_proc_open_confirm(data);
1704 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1705 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1709 static int nfs4_recover_expired_lease(struct nfs_server *server)
1711 return nfs4_client_recover_expired_lease(server->nfs_client);
1716 * reclaim state on the server after a network partition.
1717 * Assumes caller holds the appropriate lock
1719 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1721 struct nfs4_opendata *opendata;
1724 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1725 if (IS_ERR(opendata))
1726 return PTR_ERR(opendata);
1727 ret = nfs4_open_recover(opendata, state);
1729 d_drop(ctx->dentry);
1730 nfs4_opendata_put(opendata);
1734 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1736 struct nfs_server *server = NFS_SERVER(state->inode);
1737 struct nfs4_exception exception = { };
1741 err = _nfs4_open_expired(ctx, state);
1745 case -NFS4ERR_GRACE:
1746 case -NFS4ERR_DELAY:
1747 nfs4_handle_exception(server, err, &exception);
1750 } while (exception.retry);
1755 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1757 struct nfs_open_context *ctx;
1760 ctx = nfs4_state_find_open_context(state);
1762 return PTR_ERR(ctx);
1763 ret = nfs4_do_open_expired(ctx, state);
1764 put_nfs_open_context(ctx);
1768 #if defined(CONFIG_NFS_V4_1)
1769 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1771 struct nfs_server *server = NFS_SERVER(state->inode);
1772 nfs4_stateid *stateid = &state->stateid;
1775 /* If a state reset has been done, test_stateid is unneeded */
1776 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1779 status = nfs41_test_stateid(server, stateid);
1780 if (status != NFS_OK) {
1781 /* Free the stateid unless the server explicitly
1782 * informs us the stateid is unrecognized. */
1783 if (status != -NFS4ERR_BAD_STATEID)
1784 nfs41_free_stateid(server, stateid);
1785 nfs_remove_bad_delegation(state->inode);
1787 write_seqlock(&state->seqlock);
1788 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1789 write_sequnlock(&state->seqlock);
1790 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1795 * nfs41_check_open_stateid - possibly free an open stateid
1797 * @state: NFSv4 state for an inode
1799 * Returns NFS_OK if recovery for this stateid is now finished.
1800 * Otherwise a negative NFS4ERR value is returned.
1802 static int nfs41_check_open_stateid(struct nfs4_state *state)
1804 struct nfs_server *server = NFS_SERVER(state->inode);
1805 nfs4_stateid *stateid = &state->open_stateid;
1808 /* If a state reset has been done, test_stateid is unneeded */
1809 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1810 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1811 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1812 return -NFS4ERR_BAD_STATEID;
1814 status = nfs41_test_stateid(server, stateid);
1815 if (status != NFS_OK) {
1816 /* Free the stateid unless the server explicitly
1817 * informs us the stateid is unrecognized. */
1818 if (status != -NFS4ERR_BAD_STATEID)
1819 nfs41_free_stateid(server, stateid);
1821 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1822 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1823 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1828 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1832 nfs41_clear_delegation_stateid(state);
1833 status = nfs41_check_open_stateid(state);
1834 if (status != NFS_OK)
1835 status = nfs4_open_expired(sp, state);
1841 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1842 * fields corresponding to attributes that were used to store the verifier.
1843 * Make sure we clobber those fields in the later setattr call
1845 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1847 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1848 !(sattr->ia_valid & ATTR_ATIME_SET))
1849 sattr->ia_valid |= ATTR_ATIME;
1851 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1852 !(sattr->ia_valid & ATTR_MTIME_SET))
1853 sattr->ia_valid |= ATTR_MTIME;
1856 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1859 struct nfs4_state **res)
1861 struct nfs4_state_owner *sp = opendata->owner;
1862 struct nfs_server *server = sp->so_server;
1863 struct nfs4_state *state;
1867 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1869 ret = _nfs4_proc_open(opendata);
1873 state = nfs4_opendata_to_nfs4_state(opendata);
1874 ret = PTR_ERR(state);
1877 if (server->caps & NFS_CAP_POSIX_LOCK)
1878 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1880 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1884 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
1885 nfs4_schedule_stateid_recovery(server, state);
1886 nfs4_wait_clnt_recover(server->nfs_client);
1894 * Returns a referenced nfs4_state
1896 static int _nfs4_do_open(struct inode *dir,
1897 struct dentry *dentry,
1900 struct iattr *sattr,
1901 struct rpc_cred *cred,
1902 struct nfs4_state **res,
1903 struct nfs4_threshold **ctx_th)
1905 struct nfs4_state_owner *sp;
1906 struct nfs4_state *state = NULL;
1907 struct nfs_server *server = NFS_SERVER(dir);
1908 struct nfs4_opendata *opendata;
1911 /* Protect against reboot recovery conflicts */
1913 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1915 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1918 status = nfs4_recover_expired_lease(server);
1920 goto err_put_state_owner;
1921 if (dentry->d_inode != NULL)
1922 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1924 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1925 if (opendata == NULL)
1926 goto err_put_state_owner;
1928 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1929 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1930 if (!opendata->f_attr.mdsthreshold)
1931 goto err_opendata_put;
1932 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
1934 if (dentry->d_inode != NULL)
1935 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1937 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
1939 goto err_opendata_put;
1941 if (opendata->o_arg.open_flags & O_EXCL) {
1942 nfs4_exclusive_attrset(opendata, sattr);
1944 nfs_fattr_init(opendata->o_res.f_attr);
1945 status = nfs4_do_setattr(state->inode, cred,
1946 opendata->o_res.f_attr, sattr,
1949 nfs_setattr_update_inode(state->inode, sattr);
1950 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1953 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1954 *ctx_th = opendata->f_attr.mdsthreshold;
1956 kfree(opendata->f_attr.mdsthreshold);
1957 opendata->f_attr.mdsthreshold = NULL;
1959 nfs4_opendata_put(opendata);
1960 nfs4_put_state_owner(sp);
1964 kfree(opendata->f_attr.mdsthreshold);
1965 nfs4_opendata_put(opendata);
1966 err_put_state_owner:
1967 nfs4_put_state_owner(sp);
1974 static struct nfs4_state *nfs4_do_open(struct inode *dir,
1975 struct dentry *dentry,
1978 struct iattr *sattr,
1979 struct rpc_cred *cred,
1980 struct nfs4_threshold **ctx_th)
1982 struct nfs4_exception exception = { };
1983 struct nfs4_state *res;
1986 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1988 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1992 /* NOTE: BAD_SEQID means the server and client disagree about the
1993 * book-keeping w.r.t. state-changing operations
1994 * (OPEN/CLOSE/LOCK/LOCKU...)
1995 * It is actually a sign of a bug on the client or on the server.
1997 * If we receive a BAD_SEQID error in the particular case of
1998 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1999 * have unhashed the old state_owner for us, and that we can
2000 * therefore safely retry using a new one. We should still warn
2001 * the user though...
2003 if (status == -NFS4ERR_BAD_SEQID) {
2004 pr_warn_ratelimited("NFS: v4 server %s "
2005 " returned a bad sequence-id error!\n",
2006 NFS_SERVER(dir)->nfs_client->cl_hostname);
2007 exception.retry = 1;
2011 * BAD_STATEID on OPEN means that the server cancelled our
2012 * state before it received the OPEN_CONFIRM.
2013 * Recover by retrying the request as per the discussion
2014 * on Page 181 of RFC3530.
2016 if (status == -NFS4ERR_BAD_STATEID) {
2017 exception.retry = 1;
2020 if (status == -EAGAIN) {
2021 /* We must have found a delegation */
2022 exception.retry = 1;
2025 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2026 status, &exception));
2027 } while (exception.retry);
2031 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2032 struct nfs_fattr *fattr, struct iattr *sattr,
2033 struct nfs4_state *state)
2035 struct nfs_server *server = NFS_SERVER(inode);
2036 struct nfs_setattrargs arg = {
2037 .fh = NFS_FH(inode),
2040 .bitmask = server->attr_bitmask,
2042 struct nfs_setattrres res = {
2046 struct rpc_message msg = {
2047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2052 unsigned long timestamp = jiffies;
2055 nfs_fattr_init(fattr);
2057 if (state != NULL) {
2058 struct nfs_lockowner lockowner = {
2059 .l_owner = current->files,
2060 .l_pid = current->tgid,
2062 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2064 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2066 /* Use that stateid */
2068 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2070 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2071 if (status == 0 && state != NULL)
2072 renew_lease(server, timestamp);
2076 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2077 struct nfs_fattr *fattr, struct iattr *sattr,
2078 struct nfs4_state *state)
2080 struct nfs_server *server = NFS_SERVER(inode);
2081 struct nfs4_exception exception = {
2087 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2089 case -NFS4ERR_OPENMODE:
2090 if (state && !(state->state & FMODE_WRITE)) {
2092 if (sattr->ia_valid & ATTR_OPEN)
2097 err = nfs4_handle_exception(server, err, &exception);
2098 } while (exception.retry);
2103 struct nfs4_closedata {
2104 struct inode *inode;
2105 struct nfs4_state *state;
2106 struct nfs_closeargs arg;
2107 struct nfs_closeres res;
2108 struct nfs_fattr fattr;
2109 unsigned long timestamp;
2114 static void nfs4_free_closedata(void *data)
2116 struct nfs4_closedata *calldata = data;
2117 struct nfs4_state_owner *sp = calldata->state->owner;
2118 struct super_block *sb = calldata->state->inode->i_sb;
2121 pnfs_roc_release(calldata->state->inode);
2122 nfs4_put_open_state(calldata->state);
2123 nfs_free_seqid(calldata->arg.seqid);
2124 nfs4_put_state_owner(sp);
2125 nfs_sb_deactive(sb);
2129 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2132 spin_lock(&state->owner->so_lock);
2133 if (!(fmode & FMODE_READ))
2134 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2135 if (!(fmode & FMODE_WRITE))
2136 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2137 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2138 spin_unlock(&state->owner->so_lock);
2141 static void nfs4_close_done(struct rpc_task *task, void *data)
2143 struct nfs4_closedata *calldata = data;
2144 struct nfs4_state *state = calldata->state;
2145 struct nfs_server *server = NFS_SERVER(calldata->inode);
2147 dprintk("%s: begin!\n", __func__);
2148 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2150 /* hmm. we are done with the inode, and in the process of freeing
2151 * the state_owner. we keep this around to process errors
2153 switch (task->tk_status) {
2156 pnfs_roc_set_barrier(state->inode,
2157 calldata->roc_barrier);
2158 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2159 renew_lease(server, calldata->timestamp);
2160 nfs4_close_clear_stateid_flags(state,
2161 calldata->arg.fmode);
2163 case -NFS4ERR_STALE_STATEID:
2164 case -NFS4ERR_OLD_STATEID:
2165 case -NFS4ERR_BAD_STATEID:
2166 case -NFS4ERR_EXPIRED:
2167 if (calldata->arg.fmode == 0)
2170 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2171 rpc_restart_call_prepare(task);
2173 nfs_release_seqid(calldata->arg.seqid);
2174 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2175 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2178 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2180 struct nfs4_closedata *calldata = data;
2181 struct nfs4_state *state = calldata->state;
2182 struct inode *inode = calldata->inode;
2185 dprintk("%s: begin!\n", __func__);
2186 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2189 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2190 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2191 spin_lock(&state->owner->so_lock);
2192 /* Calculate the change in open mode */
2193 if (state->n_rdwr == 0) {
2194 if (state->n_rdonly == 0) {
2195 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2196 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2197 calldata->arg.fmode &= ~FMODE_READ;
2199 if (state->n_wronly == 0) {
2200 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2201 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2202 calldata->arg.fmode &= ~FMODE_WRITE;
2205 spin_unlock(&state->owner->so_lock);
2208 /* Note: exit _without_ calling nfs4_close_done */
2212 if (calldata->arg.fmode == 0) {
2213 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2214 if (calldata->roc &&
2215 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
2219 nfs_fattr_init(calldata->res.fattr);
2220 calldata->timestamp = jiffies;
2221 if (nfs4_setup_sequence(NFS_SERVER(inode),
2222 &calldata->arg.seq_args,
2223 &calldata->res.seq_res,
2225 nfs_release_seqid(calldata->arg.seqid);
2226 dprintk("%s: done!\n", __func__);
2229 task->tk_action = NULL;
2231 nfs4_sequence_done(task, &calldata->res.seq_res);
2234 static const struct rpc_call_ops nfs4_close_ops = {
2235 .rpc_call_prepare = nfs4_close_prepare,
2236 .rpc_call_done = nfs4_close_done,
2237 .rpc_release = nfs4_free_closedata,
2241 * It is possible for data to be read/written from a mem-mapped file
2242 * after the sys_close call (which hits the vfs layer as a flush).
2243 * This means that we can't safely call nfsv4 close on a file until
2244 * the inode is cleared. This in turn means that we are not good
2245 * NFSv4 citizens - we do not indicate to the server to update the file's
2246 * share state even when we are done with one of the three share
2247 * stateid's in the inode.
2249 * NOTE: Caller must be holding the sp->so_owner semaphore!
2251 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2253 struct nfs_server *server = NFS_SERVER(state->inode);
2254 struct nfs4_closedata *calldata;
2255 struct nfs4_state_owner *sp = state->owner;
2256 struct rpc_task *task;
2257 struct rpc_message msg = {
2258 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2259 .rpc_cred = state->owner->so_cred,
2261 struct rpc_task_setup task_setup_data = {
2262 .rpc_client = server->client,
2263 .rpc_message = &msg,
2264 .callback_ops = &nfs4_close_ops,
2265 .workqueue = nfsiod_workqueue,
2266 .flags = RPC_TASK_ASYNC,
2268 int status = -ENOMEM;
2270 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2271 if (calldata == NULL)
2273 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2274 calldata->inode = state->inode;
2275 calldata->state = state;
2276 calldata->arg.fh = NFS_FH(state->inode);
2277 calldata->arg.stateid = &state->open_stateid;
2278 /* Serialization for the sequence id */
2279 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2280 if (calldata->arg.seqid == NULL)
2281 goto out_free_calldata;
2282 calldata->arg.fmode = 0;
2283 calldata->arg.bitmask = server->cache_consistency_bitmask;
2284 calldata->res.fattr = &calldata->fattr;
2285 calldata->res.seqid = calldata->arg.seqid;
2286 calldata->res.server = server;
2287 calldata->roc = pnfs_roc(state->inode);
2288 nfs_sb_active(calldata->inode->i_sb);
2290 msg.rpc_argp = &calldata->arg;
2291 msg.rpc_resp = &calldata->res;
2292 task_setup_data.callback_data = calldata;
2293 task = rpc_run_task(&task_setup_data);
2295 return PTR_ERR(task);
2298 status = rpc_wait_for_completion_task(task);
2304 nfs4_put_open_state(state);
2305 nfs4_put_state_owner(sp);
2309 static struct inode *
2310 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2312 struct nfs4_state *state;
2314 /* Protect against concurrent sillydeletes */
2315 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2316 ctx->cred, &ctx->mdsthreshold);
2318 return ERR_CAST(state);
2320 return igrab(state->inode);
2323 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2325 if (ctx->state == NULL)
2328 nfs4_close_sync(ctx->state, ctx->mode);
2330 nfs4_close_state(ctx->state, ctx->mode);
2333 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2335 struct nfs4_server_caps_arg args = {
2338 struct nfs4_server_caps_res res = {};
2339 struct rpc_message msg = {
2340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2346 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2348 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2349 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2350 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2351 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2352 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2353 NFS_CAP_CTIME|NFS_CAP_MTIME);
2354 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2355 server->caps |= NFS_CAP_ACLS;
2356 if (res.has_links != 0)
2357 server->caps |= NFS_CAP_HARDLINKS;
2358 if (res.has_symlinks != 0)
2359 server->caps |= NFS_CAP_SYMLINKS;
2360 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2361 server->caps |= NFS_CAP_FILEID;
2362 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2363 server->caps |= NFS_CAP_MODE;
2364 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2365 server->caps |= NFS_CAP_NLINK;
2366 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2367 server->caps |= NFS_CAP_OWNER;
2368 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2369 server->caps |= NFS_CAP_OWNER_GROUP;
2370 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2371 server->caps |= NFS_CAP_ATIME;
2372 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2373 server->caps |= NFS_CAP_CTIME;
2374 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2375 server->caps |= NFS_CAP_MTIME;
2377 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2378 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2379 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2380 server->acl_bitmask = res.acl_bitmask;
2381 server->fh_expire_type = res.fh_expire_type;
2387 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2389 struct nfs4_exception exception = { };
2392 err = nfs4_handle_exception(server,
2393 _nfs4_server_capabilities(server, fhandle),
2395 } while (exception.retry);
2399 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2400 struct nfs_fsinfo *info)
2402 struct nfs4_lookup_root_arg args = {
2403 .bitmask = nfs4_fattr_bitmap,
2405 struct nfs4_lookup_res res = {
2407 .fattr = info->fattr,
2410 struct rpc_message msg = {
2411 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2416 nfs_fattr_init(info->fattr);
2417 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2420 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2421 struct nfs_fsinfo *info)
2423 struct nfs4_exception exception = { };
2426 err = _nfs4_lookup_root(server, fhandle, info);
2429 case -NFS4ERR_WRONGSEC:
2432 err = nfs4_handle_exception(server, err, &exception);
2434 } while (exception.retry);
2439 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2440 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2442 struct rpc_auth *auth;
2445 auth = rpcauth_create(flavor, server->client);
2450 ret = nfs4_lookup_root(server, fhandle, info);
2455 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2456 struct nfs_fsinfo *info)
2458 int i, len, status = 0;
2459 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2461 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2465 for (i = 0; i < len; i++) {
2466 /* AUTH_UNIX is the default flavor if none was specified,
2467 * thus has already been tried. */
2468 if (flav_array[i] == RPC_AUTH_UNIX)
2471 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2472 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2477 * -EACCESS could mean that the user doesn't have correct permissions
2478 * to access the mount. It could also mean that we tried to mount
2479 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2480 * existing mount programs don't handle -EACCES very well so it should
2481 * be mapped to -EPERM instead.
2483 if (status == -EACCES)
2489 * get the file handle for the "/" directory on the server
2491 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2492 struct nfs_fsinfo *info)
2494 int minor_version = server->nfs_client->cl_minorversion;
2495 int status = nfs4_lookup_root(server, fhandle, info);
2496 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2498 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2499 * by nfs4_map_errors() as this function exits.
2501 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2503 status = nfs4_server_capabilities(server, fhandle);
2505 status = nfs4_do_fsinfo(server, fhandle, info);
2506 return nfs4_map_errors(status);
2509 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2510 struct nfs_fsinfo *info)
2513 struct nfs_fattr *fattr = info->fattr;
2515 error = nfs4_server_capabilities(server, mntfh);
2517 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2521 error = nfs4_proc_getattr(server, mntfh, fattr);
2523 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2527 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2528 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2529 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2535 * Get locations and (maybe) other attributes of a referral.
2536 * Note that we'll actually follow the referral later when
2537 * we detect fsid mismatch in inode revalidation
2539 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2540 const struct qstr *name, struct nfs_fattr *fattr,
2541 struct nfs_fh *fhandle)
2543 int status = -ENOMEM;
2544 struct page *page = NULL;
2545 struct nfs4_fs_locations *locations = NULL;
2547 page = alloc_page(GFP_KERNEL);
2550 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2551 if (locations == NULL)
2554 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2557 /* Make sure server returned a different fsid for the referral */
2558 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2559 dprintk("%s: server did not return a different fsid for"
2560 " a referral at %s\n", __func__, name->name);
2564 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2565 nfs_fixup_referral_attributes(&locations->fattr);
2567 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2568 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2569 memset(fhandle, 0, sizeof(struct nfs_fh));
2577 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2579 struct nfs4_getattr_arg args = {
2581 .bitmask = server->attr_bitmask,
2583 struct nfs4_getattr_res res = {
2587 struct rpc_message msg = {
2588 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2593 nfs_fattr_init(fattr);
2594 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2597 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2599 struct nfs4_exception exception = { };
2602 err = nfs4_handle_exception(server,
2603 _nfs4_proc_getattr(server, fhandle, fattr),
2605 } while (exception.retry);
2610 * The file is not closed if it is opened due to the a request to change
2611 * the size of the file. The open call will not be needed once the
2612 * VFS layer lookup-intents are implemented.
2614 * Close is called when the inode is destroyed.
2615 * If we haven't opened the file for O_WRONLY, we
2616 * need to in the size_change case to obtain a stateid.
2619 * Because OPEN is always done by name in nfsv4, it is
2620 * possible that we opened a different file by the same
2621 * name. We can recognize this race condition, but we
2622 * can't do anything about it besides returning an error.
2624 * This will be fixed with VFS changes (lookup-intent).
2627 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2628 struct iattr *sattr)
2630 struct inode *inode = dentry->d_inode;
2631 struct rpc_cred *cred = NULL;
2632 struct nfs4_state *state = NULL;
2635 if (pnfs_ld_layoutret_on_setattr(inode))
2636 pnfs_commit_and_return_layout(inode);
2638 nfs_fattr_init(fattr);
2640 /* Deal with open(O_TRUNC) */
2641 if (sattr->ia_valid & ATTR_OPEN)
2642 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2644 /* Optimization: if the end result is no change, don't RPC */
2645 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2648 /* Search for an existing open(O_WRITE) file */
2649 if (sattr->ia_valid & ATTR_FILE) {
2650 struct nfs_open_context *ctx;
2652 ctx = nfs_file_open_context(sattr->ia_file);
2659 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2661 nfs_setattr_update_inode(inode, sattr);
2665 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2666 const struct qstr *name, struct nfs_fh *fhandle,
2667 struct nfs_fattr *fattr)
2669 struct nfs_server *server = NFS_SERVER(dir);
2671 struct nfs4_lookup_arg args = {
2672 .bitmask = server->attr_bitmask,
2673 .dir_fh = NFS_FH(dir),
2676 struct nfs4_lookup_res res = {
2681 struct rpc_message msg = {
2682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2687 nfs_fattr_init(fattr);
2689 dprintk("NFS call lookup %s\n", name->name);
2690 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2691 dprintk("NFS reply lookup: %d\n", status);
2695 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2697 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2698 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2699 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2703 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2704 struct qstr *name, struct nfs_fh *fhandle,
2705 struct nfs_fattr *fattr)
2707 struct nfs4_exception exception = { };
2708 struct rpc_clnt *client = *clnt;
2711 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2713 case -NFS4ERR_BADNAME:
2716 case -NFS4ERR_MOVED:
2717 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2719 case -NFS4ERR_WRONGSEC:
2721 if (client != *clnt)
2724 client = nfs4_create_sec_client(client, dir, name);
2726 return PTR_ERR(client);
2728 exception.retry = 1;
2731 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2733 } while (exception.retry);
2738 else if (client != *clnt)
2739 rpc_shutdown_client(client);
2744 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2745 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2748 struct rpc_clnt *client = NFS_CLIENT(dir);
2750 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2751 if (client != NFS_CLIENT(dir)) {
2752 rpc_shutdown_client(client);
2753 nfs_fixup_secinfo_attributes(fattr);
2759 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2760 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2763 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2765 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2767 rpc_shutdown_client(client);
2768 return ERR_PTR(status);
2773 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2775 struct nfs_server *server = NFS_SERVER(inode);
2776 struct nfs4_accessargs args = {
2777 .fh = NFS_FH(inode),
2778 .bitmask = server->cache_consistency_bitmask,
2780 struct nfs4_accessres res = {
2783 struct rpc_message msg = {
2784 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2787 .rpc_cred = entry->cred,
2789 int mode = entry->mask;
2793 * Determine which access bits we want to ask for...
2795 if (mode & MAY_READ)
2796 args.access |= NFS4_ACCESS_READ;
2797 if (S_ISDIR(inode->i_mode)) {
2798 if (mode & MAY_WRITE)
2799 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2800 if (mode & MAY_EXEC)
2801 args.access |= NFS4_ACCESS_LOOKUP;
2803 if (mode & MAY_WRITE)
2804 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2805 if (mode & MAY_EXEC)
2806 args.access |= NFS4_ACCESS_EXECUTE;
2809 res.fattr = nfs_alloc_fattr();
2810 if (res.fattr == NULL)
2813 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2815 nfs_access_set_mask(entry, res.access);
2816 nfs_refresh_inode(inode, res.fattr);
2818 nfs_free_fattr(res.fattr);
2822 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2824 struct nfs4_exception exception = { };
2827 err = nfs4_handle_exception(NFS_SERVER(inode),
2828 _nfs4_proc_access(inode, entry),
2830 } while (exception.retry);
2835 * TODO: For the time being, we don't try to get any attributes
2836 * along with any of the zero-copy operations READ, READDIR,
2839 * In the case of the first three, we want to put the GETATTR
2840 * after the read-type operation -- this is because it is hard
2841 * to predict the length of a GETATTR response in v4, and thus
2842 * align the READ data correctly. This means that the GETATTR
2843 * may end up partially falling into the page cache, and we should
2844 * shift it into the 'tail' of the xdr_buf before processing.
2845 * To do this efficiently, we need to know the total length
2846 * of data received, which doesn't seem to be available outside
2849 * In the case of WRITE, we also want to put the GETATTR after
2850 * the operation -- in this case because we want to make sure
2851 * we get the post-operation mtime and size.
2853 * Both of these changes to the XDR layer would in fact be quite
2854 * minor, but I decided to leave them for a subsequent patch.
2856 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2857 unsigned int pgbase, unsigned int pglen)
2859 struct nfs4_readlink args = {
2860 .fh = NFS_FH(inode),
2865 struct nfs4_readlink_res res;
2866 struct rpc_message msg = {
2867 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2872 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2875 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2876 unsigned int pgbase, unsigned int pglen)
2878 struct nfs4_exception exception = { };
2881 err = nfs4_handle_exception(NFS_SERVER(inode),
2882 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2884 } while (exception.retry);
2889 * This is just for mknod. open(O_CREAT) will always do ->open_context().
2892 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2895 struct nfs_open_context *ctx;
2896 struct nfs4_state *state;
2899 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2901 return PTR_ERR(ctx);
2903 sattr->ia_mode &= ~current_umask();
2904 state = nfs4_do_open(dir, dentry, ctx->mode,
2905 flags, sattr, ctx->cred,
2906 &ctx->mdsthreshold);
2908 if (IS_ERR(state)) {
2909 status = PTR_ERR(state);
2912 d_add(dentry, igrab(state->inode));
2913 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2916 put_nfs_open_context(ctx);
2920 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2922 struct nfs_server *server = NFS_SERVER(dir);
2923 struct nfs_removeargs args = {
2927 struct nfs_removeres res = {
2930 struct rpc_message msg = {
2931 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2937 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2939 update_changeattr(dir, &res.cinfo);
2943 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2945 struct nfs4_exception exception = { };
2948 err = nfs4_handle_exception(NFS_SERVER(dir),
2949 _nfs4_proc_remove(dir, name),
2951 } while (exception.retry);
2955 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2957 struct nfs_server *server = NFS_SERVER(dir);
2958 struct nfs_removeargs *args = msg->rpc_argp;
2959 struct nfs_removeres *res = msg->rpc_resp;
2961 res->server = server;
2962 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2963 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2966 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2968 nfs4_setup_sequence(NFS_SERVER(data->dir),
2969 &data->args.seq_args,
2974 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2976 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2978 if (!nfs4_sequence_done(task, &res->seq_res))
2980 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2982 update_changeattr(dir, &res->cinfo);
2986 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2988 struct nfs_server *server = NFS_SERVER(dir);
2989 struct nfs_renameargs *arg = msg->rpc_argp;
2990 struct nfs_renameres *res = msg->rpc_resp;
2992 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2993 res->server = server;
2994 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2997 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2999 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3000 &data->args.seq_args,
3005 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3006 struct inode *new_dir)
3008 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3010 if (!nfs4_sequence_done(task, &res->seq_res))
3012 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3015 update_changeattr(old_dir, &res->old_cinfo);
3016 update_changeattr(new_dir, &res->new_cinfo);
3020 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3021 struct inode *new_dir, struct qstr *new_name)
3023 struct nfs_server *server = NFS_SERVER(old_dir);
3024 struct nfs_renameargs arg = {
3025 .old_dir = NFS_FH(old_dir),
3026 .new_dir = NFS_FH(new_dir),
3027 .old_name = old_name,
3028 .new_name = new_name,
3030 struct nfs_renameres res = {
3033 struct rpc_message msg = {
3034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3038 int status = -ENOMEM;
3040 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3042 update_changeattr(old_dir, &res.old_cinfo);
3043 update_changeattr(new_dir, &res.new_cinfo);
3048 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3049 struct inode *new_dir, struct qstr *new_name)
3051 struct nfs4_exception exception = { };
3054 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3055 _nfs4_proc_rename(old_dir, old_name,
3058 } while (exception.retry);
3062 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3064 struct nfs_server *server = NFS_SERVER(inode);
3065 struct nfs4_link_arg arg = {
3066 .fh = NFS_FH(inode),
3067 .dir_fh = NFS_FH(dir),
3069 .bitmask = server->attr_bitmask,
3071 struct nfs4_link_res res = {
3074 struct rpc_message msg = {
3075 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3079 int status = -ENOMEM;
3081 res.fattr = nfs_alloc_fattr();
3082 if (res.fattr == NULL)
3085 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3087 update_changeattr(dir, &res.cinfo);
3088 nfs_post_op_update_inode(inode, res.fattr);
3091 nfs_free_fattr(res.fattr);
3095 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3097 struct nfs4_exception exception = { };
3100 err = nfs4_handle_exception(NFS_SERVER(inode),
3101 _nfs4_proc_link(inode, dir, name),
3103 } while (exception.retry);
3107 struct nfs4_createdata {
3108 struct rpc_message msg;
3109 struct nfs4_create_arg arg;
3110 struct nfs4_create_res res;
3112 struct nfs_fattr fattr;
3115 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3116 struct qstr *name, struct iattr *sattr, u32 ftype)
3118 struct nfs4_createdata *data;
3120 data = kzalloc(sizeof(*data), GFP_KERNEL);
3122 struct nfs_server *server = NFS_SERVER(dir);
3124 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3125 data->msg.rpc_argp = &data->arg;
3126 data->msg.rpc_resp = &data->res;
3127 data->arg.dir_fh = NFS_FH(dir);
3128 data->arg.server = server;
3129 data->arg.name = name;
3130 data->arg.attrs = sattr;
3131 data->arg.ftype = ftype;
3132 data->arg.bitmask = server->attr_bitmask;
3133 data->res.server = server;
3134 data->res.fh = &data->fh;
3135 data->res.fattr = &data->fattr;
3136 nfs_fattr_init(data->res.fattr);
3141 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3143 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3144 &data->arg.seq_args, &data->res.seq_res, 1);
3146 update_changeattr(dir, &data->res.dir_cinfo);
3147 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3152 static void nfs4_free_createdata(struct nfs4_createdata *data)
3157 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3158 struct page *page, unsigned int len, struct iattr *sattr)
3160 struct nfs4_createdata *data;
3161 int status = -ENAMETOOLONG;
3163 if (len > NFS4_MAXPATHLEN)
3167 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3171 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3172 data->arg.u.symlink.pages = &page;
3173 data->arg.u.symlink.len = len;
3175 status = nfs4_do_create(dir, dentry, data);
3177 nfs4_free_createdata(data);
3182 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3183 struct page *page, unsigned int len, struct iattr *sattr)
3185 struct nfs4_exception exception = { };
3188 err = nfs4_handle_exception(NFS_SERVER(dir),
3189 _nfs4_proc_symlink(dir, dentry, page,
3192 } while (exception.retry);
3196 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3197 struct iattr *sattr)
3199 struct nfs4_createdata *data;
3200 int status = -ENOMEM;
3202 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3206 status = nfs4_do_create(dir, dentry, data);
3208 nfs4_free_createdata(data);
3213 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3214 struct iattr *sattr)
3216 struct nfs4_exception exception = { };
3219 sattr->ia_mode &= ~current_umask();
3221 err = nfs4_handle_exception(NFS_SERVER(dir),
3222 _nfs4_proc_mkdir(dir, dentry, sattr),
3224 } while (exception.retry);
3228 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3229 u64 cookie, struct page **pages, unsigned int count, int plus)
3231 struct inode *dir = dentry->d_inode;
3232 struct nfs4_readdir_arg args = {
3237 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3240 struct nfs4_readdir_res res;
3241 struct rpc_message msg = {
3242 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3249 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3250 dentry->d_parent->d_name.name,
3251 dentry->d_name.name,
3252 (unsigned long long)cookie);
3253 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3254 res.pgbase = args.pgbase;
3255 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3257 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3258 status += args.pgbase;
3261 nfs_invalidate_atime(dir);
3263 dprintk("%s: returns %d\n", __func__, status);
3267 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3268 u64 cookie, struct page **pages, unsigned int count, int plus)
3270 struct nfs4_exception exception = { };
3273 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3274 _nfs4_proc_readdir(dentry, cred, cookie,
3275 pages, count, plus),
3277 } while (exception.retry);
3281 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3282 struct iattr *sattr, dev_t rdev)
3284 struct nfs4_createdata *data;
3285 int mode = sattr->ia_mode;
3286 int status = -ENOMEM;
3288 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3293 data->arg.ftype = NF4FIFO;
3294 else if (S_ISBLK(mode)) {
3295 data->arg.ftype = NF4BLK;
3296 data->arg.u.device.specdata1 = MAJOR(rdev);
3297 data->arg.u.device.specdata2 = MINOR(rdev);
3299 else if (S_ISCHR(mode)) {
3300 data->arg.ftype = NF4CHR;
3301 data->arg.u.device.specdata1 = MAJOR(rdev);
3302 data->arg.u.device.specdata2 = MINOR(rdev);
3303 } else if (!S_ISSOCK(mode)) {
3308 status = nfs4_do_create(dir, dentry, data);
3310 nfs4_free_createdata(data);
3315 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3316 struct iattr *sattr, dev_t rdev)
3318 struct nfs4_exception exception = { };
3321 sattr->ia_mode &= ~current_umask();
3323 err = nfs4_handle_exception(NFS_SERVER(dir),
3324 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3326 } while (exception.retry);
3330 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3331 struct nfs_fsstat *fsstat)
3333 struct nfs4_statfs_arg args = {
3335 .bitmask = server->attr_bitmask,
3337 struct nfs4_statfs_res res = {
3340 struct rpc_message msg = {
3341 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3346 nfs_fattr_init(fsstat->fattr);
3347 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3350 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3352 struct nfs4_exception exception = { };
3355 err = nfs4_handle_exception(server,
3356 _nfs4_proc_statfs(server, fhandle, fsstat),
3358 } while (exception.retry);
3362 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3363 struct nfs_fsinfo *fsinfo)
3365 struct nfs4_fsinfo_arg args = {
3367 .bitmask = server->attr_bitmask,
3369 struct nfs4_fsinfo_res res = {
3372 struct rpc_message msg = {
3373 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3378 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3381 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3383 struct nfs4_exception exception = { };
3387 err = nfs4_handle_exception(server,
3388 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3390 } while (exception.retry);
3394 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3398 nfs_fattr_init(fsinfo->fattr);
3399 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3401 /* block layout checks this! */
3402 server->pnfs_blksize = fsinfo->blksize;
3403 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3409 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3410 struct nfs_pathconf *pathconf)
3412 struct nfs4_pathconf_arg args = {
3414 .bitmask = server->attr_bitmask,
3416 struct nfs4_pathconf_res res = {
3417 .pathconf = pathconf,
3419 struct rpc_message msg = {
3420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3425 /* None of the pathconf attributes are mandatory to implement */
3426 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3427 memset(pathconf, 0, sizeof(*pathconf));
3431 nfs_fattr_init(pathconf->fattr);
3432 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3435 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3436 struct nfs_pathconf *pathconf)
3438 struct nfs4_exception exception = { };
3442 err = nfs4_handle_exception(server,
3443 _nfs4_proc_pathconf(server, fhandle, pathconf),
3445 } while (exception.retry);
3449 void __nfs4_read_done_cb(struct nfs_read_data *data)
3451 nfs_invalidate_atime(data->header->inode);
3454 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3456 struct nfs_server *server = NFS_SERVER(data->header->inode);
3458 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3459 rpc_restart_call_prepare(task);
3463 __nfs4_read_done_cb(data);
3464 if (task->tk_status > 0)
3465 renew_lease(server, data->timestamp);
3469 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3472 dprintk("--> %s\n", __func__);
3474 if (!nfs4_sequence_done(task, &data->res.seq_res))
3477 return data->read_done_cb ? data->read_done_cb(task, data) :
3478 nfs4_read_done_cb(task, data);
3481 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3483 data->timestamp = jiffies;
3484 data->read_done_cb = nfs4_read_done_cb;
3485 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3486 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3489 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3491 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3492 &data->args.seq_args,
3497 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3499 struct inode *inode = data->header->inode;
3501 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3502 rpc_restart_call_prepare(task);
3505 if (task->tk_status >= 0) {
3506 renew_lease(NFS_SERVER(inode), data->timestamp);
3507 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3512 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3514 if (!nfs4_sequence_done(task, &data->res.seq_res))
3516 return data->write_done_cb ? data->write_done_cb(task, data) :
3517 nfs4_write_done_cb(task, data);
3521 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3523 const struct nfs_pgio_header *hdr = data->header;
3525 /* Don't request attributes for pNFS or O_DIRECT writes */
3526 if (data->ds_clp != NULL || hdr->dreq != NULL)
3528 /* Otherwise, request attributes if and only if we don't hold
3531 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3534 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3536 struct nfs_server *server = NFS_SERVER(data->header->inode);
3538 if (!nfs4_write_need_cache_consistency_data(data)) {
3539 data->args.bitmask = NULL;
3540 data->res.fattr = NULL;
3542 data->args.bitmask = server->cache_consistency_bitmask;
3544 if (!data->write_done_cb)
3545 data->write_done_cb = nfs4_write_done_cb;
3546 data->res.server = server;
3547 data->timestamp = jiffies;
3549 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3550 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3553 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3555 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3556 &data->args.seq_args,
3561 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3563 nfs4_setup_sequence(NFS_SERVER(data->inode),
3564 &data->args.seq_args,
3569 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3571 struct inode *inode = data->inode;
3573 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3574 rpc_restart_call_prepare(task);
3580 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3582 if (!nfs4_sequence_done(task, &data->res.seq_res))
3584 return data->commit_done_cb(task, data);
3587 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3589 struct nfs_server *server = NFS_SERVER(data->inode);
3591 if (data->commit_done_cb == NULL)
3592 data->commit_done_cb = nfs4_commit_done_cb;
3593 data->res.server = server;
3594 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3595 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3598 struct nfs4_renewdata {
3599 struct nfs_client *client;
3600 unsigned long timestamp;
3604 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3605 * standalone procedure for queueing an asynchronous RENEW.
3607 static void nfs4_renew_release(void *calldata)
3609 struct nfs4_renewdata *data = calldata;
3610 struct nfs_client *clp = data->client;
3612 if (atomic_read(&clp->cl_count) > 1)
3613 nfs4_schedule_state_renewal(clp);
3614 nfs_put_client(clp);
3618 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3620 struct nfs4_renewdata *data = calldata;
3621 struct nfs_client *clp = data->client;
3622 unsigned long timestamp = data->timestamp;
3624 if (task->tk_status < 0) {
3625 /* Unless we're shutting down, schedule state recovery! */
3626 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3628 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3629 nfs4_schedule_lease_recovery(clp);
3632 nfs4_schedule_path_down_recovery(clp);
3634 do_renew_lease(clp, timestamp);
3637 static const struct rpc_call_ops nfs4_renew_ops = {
3638 .rpc_call_done = nfs4_renew_done,
3639 .rpc_release = nfs4_renew_release,
3642 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3644 struct rpc_message msg = {
3645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3649 struct nfs4_renewdata *data;
3651 if (renew_flags == 0)
3653 if (!atomic_inc_not_zero(&clp->cl_count))
3655 data = kmalloc(sizeof(*data), GFP_NOFS);
3659 data->timestamp = jiffies;
3660 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3661 &nfs4_renew_ops, data);
3664 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3666 struct rpc_message msg = {
3667 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3671 unsigned long now = jiffies;
3674 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3677 do_renew_lease(clp, now);
3681 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3683 return (server->caps & NFS_CAP_ACLS)
3684 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3685 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3688 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3689 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3692 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3694 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3695 struct page **pages, unsigned int *pgbase)
3697 struct page *newpage, **spages;
3703 len = min_t(size_t, PAGE_SIZE, buflen);
3704 newpage = alloc_page(GFP_KERNEL);
3706 if (newpage == NULL)
3708 memcpy(page_address(newpage), buf, len);
3713 } while (buflen != 0);
3719 __free_page(spages[rc-1]);
3723 struct nfs4_cached_acl {
3729 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3731 struct nfs_inode *nfsi = NFS_I(inode);
3733 spin_lock(&inode->i_lock);
3734 kfree(nfsi->nfs4_acl);
3735 nfsi->nfs4_acl = acl;
3736 spin_unlock(&inode->i_lock);
3739 static void nfs4_zap_acl_attr(struct inode *inode)
3741 nfs4_set_cached_acl(inode, NULL);
3744 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3746 struct nfs_inode *nfsi = NFS_I(inode);
3747 struct nfs4_cached_acl *acl;
3750 spin_lock(&inode->i_lock);
3751 acl = nfsi->nfs4_acl;
3754 if (buf == NULL) /* user is just asking for length */
3756 if (acl->cached == 0)
3758 ret = -ERANGE; /* see getxattr(2) man page */
3759 if (acl->len > buflen)
3761 memcpy(buf, acl->data, acl->len);
3765 spin_unlock(&inode->i_lock);
3769 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3771 struct nfs4_cached_acl *acl;
3772 size_t buflen = sizeof(*acl) + acl_len;
3774 if (buflen <= PAGE_SIZE) {
3775 acl = kmalloc(buflen, GFP_KERNEL);
3779 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3781 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3788 nfs4_set_cached_acl(inode, acl);
3792 * The getxattr API returns the required buffer length when called with a
3793 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3794 * the required buf. On a NULL buf, we send a page of data to the server
3795 * guessing that the ACL request can be serviced by a page. If so, we cache
3796 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3797 * the cache. If not so, we throw away the page, and cache the required
3798 * length. The next getxattr call will then produce another round trip to
3799 * the server, this time with the input buf of the required size.
3801 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3803 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3804 struct nfs_getaclargs args = {
3805 .fh = NFS_FH(inode),
3809 struct nfs_getaclres res = {
3812 struct rpc_message msg = {
3813 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3817 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3818 int ret = -ENOMEM, i;
3820 /* As long as we're doing a round trip to the server anyway,
3821 * let's be prepared for a page of acl data. */
3824 if (npages > ARRAY_SIZE(pages))
3827 for (i = 0; i < npages; i++) {
3828 pages[i] = alloc_page(GFP_KERNEL);
3833 /* for decoding across pages */
3834 res.acl_scratch = alloc_page(GFP_KERNEL);
3835 if (!res.acl_scratch)
3838 args.acl_len = npages * PAGE_SIZE;
3839 args.acl_pgbase = 0;
3841 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3842 __func__, buf, buflen, npages, args.acl_len);
3843 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3844 &msg, &args.seq_args, &res.seq_res, 0);
3848 /* Handle the case where the passed-in buffer is too short */
3849 if (res.acl_flags & NFS4_ACL_TRUNC) {
3850 /* Did the user only issue a request for the acl length? */
3856 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3858 if (res.acl_len > buflen) {
3862 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3867 for (i = 0; i < npages; i++)
3869 __free_page(pages[i]);
3870 if (res.acl_scratch)
3871 __free_page(res.acl_scratch);
3875 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3877 struct nfs4_exception exception = { };
3880 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3883 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3884 } while (exception.retry);
3888 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3890 struct nfs_server *server = NFS_SERVER(inode);
3893 if (!nfs4_server_supports_acls(server))
3895 ret = nfs_revalidate_inode(server, inode);
3898 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3899 nfs_zap_acl_cache(inode);
3900 ret = nfs4_read_cached_acl(inode, buf, buflen);
3902 /* -ENOENT is returned if there is no ACL or if there is an ACL
3903 * but no cached acl data, just the acl length */
3905 return nfs4_get_acl_uncached(inode, buf, buflen);
3908 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3910 struct nfs_server *server = NFS_SERVER(inode);
3911 struct page *pages[NFS4ACL_MAXPAGES];
3912 struct nfs_setaclargs arg = {
3913 .fh = NFS_FH(inode),
3917 struct nfs_setaclres res;
3918 struct rpc_message msg = {
3919 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3923 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3926 if (!nfs4_server_supports_acls(server))
3928 if (npages > ARRAY_SIZE(pages))
3930 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3933 nfs4_inode_return_delegation(inode);
3934 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3937 * Free each page after tx, so the only ref left is
3938 * held by the network stack
3941 put_page(pages[i-1]);
3944 * Acl update can result in inode attribute update.
3945 * so mark the attribute cache invalid.
3947 spin_lock(&inode->i_lock);
3948 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3949 spin_unlock(&inode->i_lock);
3950 nfs_access_zap_cache(inode);
3951 nfs_zap_acl_cache(inode);
3955 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3957 struct nfs4_exception exception = { };
3960 err = nfs4_handle_exception(NFS_SERVER(inode),
3961 __nfs4_proc_set_acl(inode, buf, buflen),
3963 } while (exception.retry);
3968 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3970 struct nfs_client *clp = server->nfs_client;
3972 if (task->tk_status >= 0)
3974 switch(task->tk_status) {
3975 case -NFS4ERR_DELEG_REVOKED:
3976 case -NFS4ERR_ADMIN_REVOKED:
3977 case -NFS4ERR_BAD_STATEID:
3980 nfs_remove_bad_delegation(state->inode);
3981 case -NFS4ERR_OPENMODE:
3984 nfs4_schedule_stateid_recovery(server, state);
3985 goto wait_on_recovery;
3986 case -NFS4ERR_EXPIRED:
3988 nfs4_schedule_stateid_recovery(server, state);
3989 case -NFS4ERR_STALE_STATEID:
3990 case -NFS4ERR_STALE_CLIENTID:
3991 nfs4_schedule_lease_recovery(clp);
3992 goto wait_on_recovery;
3993 #if defined(CONFIG_NFS_V4_1)
3994 case -NFS4ERR_BADSESSION:
3995 case -NFS4ERR_BADSLOT:
3996 case -NFS4ERR_BAD_HIGH_SLOT:
3997 case -NFS4ERR_DEADSESSION:
3998 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3999 case -NFS4ERR_SEQ_FALSE_RETRY:
4000 case -NFS4ERR_SEQ_MISORDERED:
4001 dprintk("%s ERROR %d, Reset session\n", __func__,
4003 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4004 task->tk_status = 0;
4006 #endif /* CONFIG_NFS_V4_1 */
4007 case -NFS4ERR_DELAY:
4008 nfs_inc_server_stats(server, NFSIOS_DELAY);
4009 case -NFS4ERR_GRACE:
4010 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4011 task->tk_status = 0;
4013 case -NFS4ERR_RETRY_UNCACHED_REP:
4014 case -NFS4ERR_OLD_STATEID:
4015 task->tk_status = 0;
4018 task->tk_status = nfs4_map_errors(task->tk_status);
4021 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
4022 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4023 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4024 task->tk_status = 0;
4028 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4029 nfs4_verifier *bootverf)
4033 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4034 /* An impossible timestamp guarantees this value
4035 * will never match a generated boot time. */
4037 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4039 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4040 verf[0] = (__be32)nn->boot_time.tv_sec;
4041 verf[1] = (__be32)nn->boot_time.tv_nsec;
4043 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4047 nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4048 char *buf, size_t len)
4050 unsigned int result;
4053 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4055 rpc_peeraddr2str(clp->cl_rpcclient,
4057 rpc_peeraddr2str(clp->cl_rpcclient,
4058 RPC_DISPLAY_PROTO));
4064 nfs4_init_uniform_client_string(const struct nfs_client *clp,
4065 char *buf, size_t len)
4067 char *nodename = clp->cl_rpcclient->cl_nodename;
4069 if (nfs4_client_id_uniquifier[0] != '\0')
4070 nodename = nfs4_client_id_uniquifier;
4071 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4072 clp->rpc_ops->version, clp->cl_minorversion,
4077 * nfs4_proc_setclientid - Negotiate client ID
4078 * @clp: state data structure
4079 * @program: RPC program for NFSv4 callback service
4080 * @port: IP port number for NFS4 callback service
4081 * @cred: RPC credential to use for this call
4082 * @res: where to place the result
4084 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4086 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4087 unsigned short port, struct rpc_cred *cred,
4088 struct nfs4_setclientid_res *res)
4090 nfs4_verifier sc_verifier;
4091 struct nfs4_setclientid setclientid = {
4092 .sc_verifier = &sc_verifier,
4094 .sc_cb_ident = clp->cl_cb_ident,
4096 struct rpc_message msg = {
4097 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4098 .rpc_argp = &setclientid,
4104 /* nfs_client_id4 */
4105 nfs4_init_boot_verifier(clp, &sc_verifier);
4106 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4107 setclientid.sc_name_len =
4108 nfs4_init_uniform_client_string(clp,
4109 setclientid.sc_name,
4110 sizeof(setclientid.sc_name));
4112 setclientid.sc_name_len =
4113 nfs4_init_nonuniform_client_string(clp,
4114 setclientid.sc_name,
4115 sizeof(setclientid.sc_name));
4118 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4119 sizeof(setclientid.sc_netid),
4120 rpc_peeraddr2str(clp->cl_rpcclient,
4121 RPC_DISPLAY_NETID));
4123 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4124 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4125 clp->cl_ipaddr, port >> 8, port & 255);
4127 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4128 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4129 setclientid.sc_name_len, setclientid.sc_name);
4130 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4131 dprintk("NFS reply setclientid: %d\n", status);
4136 * nfs4_proc_setclientid_confirm - Confirm client ID
4137 * @clp: state data structure
4138 * @res: result of a previous SETCLIENTID
4139 * @cred: RPC credential to use for this call
4141 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4143 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4144 struct nfs4_setclientid_res *arg,
4145 struct rpc_cred *cred)
4147 struct nfs_fsinfo fsinfo;
4148 struct rpc_message msg = {
4149 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4151 .rpc_resp = &fsinfo,
4157 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4158 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4161 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4163 spin_lock(&clp->cl_lock);
4164 clp->cl_lease_time = fsinfo.lease_time * HZ;
4165 clp->cl_last_renewal = now;
4166 spin_unlock(&clp->cl_lock);
4168 dprintk("NFS reply setclientid_confirm: %d\n", status);
4172 struct nfs4_delegreturndata {
4173 struct nfs4_delegreturnargs args;
4174 struct nfs4_delegreturnres res;
4176 nfs4_stateid stateid;
4177 unsigned long timestamp;
4178 struct nfs_fattr fattr;
4182 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4184 struct nfs4_delegreturndata *data = calldata;
4186 if (!nfs4_sequence_done(task, &data->res.seq_res))
4189 switch (task->tk_status) {
4190 case -NFS4ERR_STALE_STATEID:
4191 case -NFS4ERR_EXPIRED:
4193 renew_lease(data->res.server, data->timestamp);
4196 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4198 rpc_restart_call_prepare(task);
4202 data->rpc_status = task->tk_status;
4205 static void nfs4_delegreturn_release(void *calldata)
4210 #if defined(CONFIG_NFS_V4_1)
4211 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4213 struct nfs4_delegreturndata *d_data;
4215 d_data = (struct nfs4_delegreturndata *)data;
4217 nfs4_setup_sequence(d_data->res.server,
4218 &d_data->args.seq_args,
4219 &d_data->res.seq_res,
4222 #endif /* CONFIG_NFS_V4_1 */
4224 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4225 #if defined(CONFIG_NFS_V4_1)
4226 .rpc_call_prepare = nfs4_delegreturn_prepare,
4227 #endif /* CONFIG_NFS_V4_1 */
4228 .rpc_call_done = nfs4_delegreturn_done,
4229 .rpc_release = nfs4_delegreturn_release,
4232 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4234 struct nfs4_delegreturndata *data;
4235 struct nfs_server *server = NFS_SERVER(inode);
4236 struct rpc_task *task;
4237 struct rpc_message msg = {
4238 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4241 struct rpc_task_setup task_setup_data = {
4242 .rpc_client = server->client,
4243 .rpc_message = &msg,
4244 .callback_ops = &nfs4_delegreturn_ops,
4245 .flags = RPC_TASK_ASYNC,
4249 data = kzalloc(sizeof(*data), GFP_NOFS);
4252 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4253 data->args.fhandle = &data->fh;
4254 data->args.stateid = &data->stateid;
4255 data->args.bitmask = server->cache_consistency_bitmask;
4256 nfs_copy_fh(&data->fh, NFS_FH(inode));
4257 nfs4_stateid_copy(&data->stateid, stateid);
4258 data->res.fattr = &data->fattr;
4259 data->res.server = server;
4260 nfs_fattr_init(data->res.fattr);
4261 data->timestamp = jiffies;
4262 data->rpc_status = 0;
4264 task_setup_data.callback_data = data;
4265 msg.rpc_argp = &data->args;
4266 msg.rpc_resp = &data->res;
4267 task = rpc_run_task(&task_setup_data);
4269 return PTR_ERR(task);
4272 status = nfs4_wait_for_completion_rpc_task(task);
4275 status = data->rpc_status;
4277 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4279 nfs_refresh_inode(inode, &data->fattr);
4285 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4287 struct nfs_server *server = NFS_SERVER(inode);
4288 struct nfs4_exception exception = { };
4291 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4293 case -NFS4ERR_STALE_STATEID:
4294 case -NFS4ERR_EXPIRED:
4298 err = nfs4_handle_exception(server, err, &exception);
4299 } while (exception.retry);
4303 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4304 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4307 * sleep, with exponential backoff, and retry the LOCK operation.
4309 static unsigned long
4310 nfs4_set_lock_task_retry(unsigned long timeout)
4312 freezable_schedule_timeout_killable(timeout);
4314 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4315 return NFS4_LOCK_MAXTIMEOUT;
4319 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4321 struct inode *inode = state->inode;
4322 struct nfs_server *server = NFS_SERVER(inode);
4323 struct nfs_client *clp = server->nfs_client;
4324 struct nfs_lockt_args arg = {
4325 .fh = NFS_FH(inode),
4328 struct nfs_lockt_res res = {
4331 struct rpc_message msg = {
4332 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4335 .rpc_cred = state->owner->so_cred,
4337 struct nfs4_lock_state *lsp;
4340 arg.lock_owner.clientid = clp->cl_clientid;
4341 status = nfs4_set_lock_state(state, request);
4344 lsp = request->fl_u.nfs4_fl.owner;
4345 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4346 arg.lock_owner.s_dev = server->s_dev;
4347 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4350 request->fl_type = F_UNLCK;
4352 case -NFS4ERR_DENIED:
4355 request->fl_ops->fl_release_private(request);
4360 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4362 struct nfs4_exception exception = { };
4366 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4367 _nfs4_proc_getlk(state, cmd, request),
4369 } while (exception.retry);
4373 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4376 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4378 res = posix_lock_file_wait(file, fl);
4381 res = flock_lock_file_wait(file, fl);
4389 struct nfs4_unlockdata {
4390 struct nfs_locku_args arg;
4391 struct nfs_locku_res res;
4392 struct nfs4_lock_state *lsp;
4393 struct nfs_open_context *ctx;
4394 struct file_lock fl;
4395 const struct nfs_server *server;
4396 unsigned long timestamp;
4399 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4400 struct nfs_open_context *ctx,
4401 struct nfs4_lock_state *lsp,
4402 struct nfs_seqid *seqid)
4404 struct nfs4_unlockdata *p;
4405 struct inode *inode = lsp->ls_state->inode;
4407 p = kzalloc(sizeof(*p), GFP_NOFS);
4410 p->arg.fh = NFS_FH(inode);
4412 p->arg.seqid = seqid;
4413 p->res.seqid = seqid;
4414 p->arg.stateid = &lsp->ls_stateid;
4416 atomic_inc(&lsp->ls_count);
4417 /* Ensure we don't close file until we're done freeing locks! */
4418 p->ctx = get_nfs_open_context(ctx);
4419 memcpy(&p->fl, fl, sizeof(p->fl));
4420 p->server = NFS_SERVER(inode);
4424 static void nfs4_locku_release_calldata(void *data)
4426 struct nfs4_unlockdata *calldata = data;
4427 nfs_free_seqid(calldata->arg.seqid);
4428 nfs4_put_lock_state(calldata->lsp);
4429 put_nfs_open_context(calldata->ctx);
4433 static void nfs4_locku_done(struct rpc_task *task, void *data)
4435 struct nfs4_unlockdata *calldata = data;
4437 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4439 switch (task->tk_status) {
4441 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4442 &calldata->res.stateid);
4443 renew_lease(calldata->server, calldata->timestamp);
4445 case -NFS4ERR_BAD_STATEID:
4446 case -NFS4ERR_OLD_STATEID:
4447 case -NFS4ERR_STALE_STATEID:
4448 case -NFS4ERR_EXPIRED:
4451 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4452 rpc_restart_call_prepare(task);
4454 nfs_release_seqid(calldata->arg.seqid);
4457 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4459 struct nfs4_unlockdata *calldata = data;
4461 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4463 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
4464 /* Note: exit _without_ running nfs4_locku_done */
4467 calldata->timestamp = jiffies;
4468 if (nfs4_setup_sequence(calldata->server,
4469 &calldata->arg.seq_args,
4470 &calldata->res.seq_res,
4472 nfs_release_seqid(calldata->arg.seqid);
4475 task->tk_action = NULL;
4477 nfs4_sequence_done(task, &calldata->res.seq_res);
4480 static const struct rpc_call_ops nfs4_locku_ops = {
4481 .rpc_call_prepare = nfs4_locku_prepare,
4482 .rpc_call_done = nfs4_locku_done,
4483 .rpc_release = nfs4_locku_release_calldata,
4486 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4487 struct nfs_open_context *ctx,
4488 struct nfs4_lock_state *lsp,
4489 struct nfs_seqid *seqid)
4491 struct nfs4_unlockdata *data;
4492 struct rpc_message msg = {
4493 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4494 .rpc_cred = ctx->cred,
4496 struct rpc_task_setup task_setup_data = {
4497 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4498 .rpc_message = &msg,
4499 .callback_ops = &nfs4_locku_ops,
4500 .workqueue = nfsiod_workqueue,
4501 .flags = RPC_TASK_ASYNC,
4504 /* Ensure this is an unlock - when canceling a lock, the
4505 * canceled lock is passed in, and it won't be an unlock.
4507 fl->fl_type = F_UNLCK;
4509 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4511 nfs_free_seqid(seqid);
4512 return ERR_PTR(-ENOMEM);
4515 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4516 msg.rpc_argp = &data->arg;
4517 msg.rpc_resp = &data->res;
4518 task_setup_data.callback_data = data;
4519 return rpc_run_task(&task_setup_data);
4522 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4524 struct inode *inode = state->inode;
4525 struct nfs4_state_owner *sp = state->owner;
4526 struct nfs_inode *nfsi = NFS_I(inode);
4527 struct nfs_seqid *seqid;
4528 struct nfs4_lock_state *lsp;
4529 struct rpc_task *task;
4531 unsigned char fl_flags = request->fl_flags;
4533 status = nfs4_set_lock_state(state, request);
4534 /* Unlock _before_ we do the RPC call */
4535 request->fl_flags |= FL_EXISTS;
4536 /* Exclude nfs_delegation_claim_locks() */
4537 mutex_lock(&sp->so_delegreturn_mutex);
4538 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
4539 down_read(&nfsi->rwsem);
4540 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4541 up_read(&nfsi->rwsem);
4542 mutex_unlock(&sp->so_delegreturn_mutex);
4545 up_read(&nfsi->rwsem);
4546 mutex_unlock(&sp->so_delegreturn_mutex);
4549 /* Is this a delegated lock? */
4550 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4552 lsp = request->fl_u.nfs4_fl.owner;
4553 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4557 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4558 status = PTR_ERR(task);
4561 status = nfs4_wait_for_completion_rpc_task(task);
4564 request->fl_flags = fl_flags;
4568 struct nfs4_lockdata {
4569 struct nfs_lock_args arg;
4570 struct nfs_lock_res res;
4571 struct nfs4_lock_state *lsp;
4572 struct nfs_open_context *ctx;
4573 struct file_lock fl;
4574 unsigned long timestamp;
4577 struct nfs_server *server;
4580 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4581 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4584 struct nfs4_lockdata *p;
4585 struct inode *inode = lsp->ls_state->inode;
4586 struct nfs_server *server = NFS_SERVER(inode);
4588 p = kzalloc(sizeof(*p), gfp_mask);
4592 p->arg.fh = NFS_FH(inode);
4594 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4595 if (p->arg.open_seqid == NULL)
4597 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4598 if (p->arg.lock_seqid == NULL)
4599 goto out_free_seqid;
4600 p->arg.lock_stateid = &lsp->ls_stateid;
4601 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4602 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4603 p->arg.lock_owner.s_dev = server->s_dev;
4604 p->res.lock_seqid = p->arg.lock_seqid;
4607 atomic_inc(&lsp->ls_count);
4608 p->ctx = get_nfs_open_context(ctx);
4609 memcpy(&p->fl, fl, sizeof(p->fl));
4612 nfs_free_seqid(p->arg.open_seqid);
4618 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4620 struct nfs4_lockdata *data = calldata;
4621 struct nfs4_state *state = data->lsp->ls_state;
4623 dprintk("%s: begin!\n", __func__);
4624 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4626 /* Do we need to do an open_to_lock_owner? */
4627 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4628 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
4629 goto out_release_lock_seqid;
4631 data->arg.open_stateid = &state->stateid;
4632 data->arg.new_lock_owner = 1;
4633 data->res.open_seqid = data->arg.open_seqid;
4635 data->arg.new_lock_owner = 0;
4636 data->timestamp = jiffies;
4637 if (nfs4_setup_sequence(data->server,
4638 &data->arg.seq_args,
4642 nfs_release_seqid(data->arg.open_seqid);
4643 out_release_lock_seqid:
4644 nfs_release_seqid(data->arg.lock_seqid);
4646 nfs4_sequence_done(task, &data->res.seq_res);
4647 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4650 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4652 struct nfs4_lockdata *data = calldata;
4654 dprintk("%s: begin!\n", __func__);
4656 if (!nfs4_sequence_done(task, &data->res.seq_res))
4659 data->rpc_status = task->tk_status;
4660 if (data->arg.new_lock_owner != 0) {
4661 if (data->rpc_status == 0)
4662 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4666 if (data->rpc_status == 0) {
4667 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4668 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
4669 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4672 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4675 static void nfs4_lock_release(void *calldata)
4677 struct nfs4_lockdata *data = calldata;
4679 dprintk("%s: begin!\n", __func__);
4680 nfs_free_seqid(data->arg.open_seqid);
4681 if (data->cancelled != 0) {
4682 struct rpc_task *task;
4683 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4684 data->arg.lock_seqid);
4686 rpc_put_task_async(task);
4687 dprintk("%s: cancelling lock!\n", __func__);
4689 nfs_free_seqid(data->arg.lock_seqid);
4690 nfs4_put_lock_state(data->lsp);
4691 put_nfs_open_context(data->ctx);
4693 dprintk("%s: done!\n", __func__);
4696 static const struct rpc_call_ops nfs4_lock_ops = {
4697 .rpc_call_prepare = nfs4_lock_prepare,
4698 .rpc_call_done = nfs4_lock_done,
4699 .rpc_release = nfs4_lock_release,
4702 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4705 case -NFS4ERR_ADMIN_REVOKED:
4706 case -NFS4ERR_BAD_STATEID:
4707 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4708 if (new_lock_owner != 0 ||
4709 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
4710 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4712 case -NFS4ERR_STALE_STATEID:
4713 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4714 case -NFS4ERR_EXPIRED:
4715 nfs4_schedule_lease_recovery(server->nfs_client);
4719 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4721 struct nfs4_lockdata *data;
4722 struct rpc_task *task;
4723 struct rpc_message msg = {
4724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4725 .rpc_cred = state->owner->so_cred,
4727 struct rpc_task_setup task_setup_data = {
4728 .rpc_client = NFS_CLIENT(state->inode),
4729 .rpc_message = &msg,
4730 .callback_ops = &nfs4_lock_ops,
4731 .workqueue = nfsiod_workqueue,
4732 .flags = RPC_TASK_ASYNC,
4736 dprintk("%s: begin!\n", __func__);
4737 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4738 fl->fl_u.nfs4_fl.owner,
4739 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4743 data->arg.block = 1;
4744 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4745 msg.rpc_argp = &data->arg;
4746 msg.rpc_resp = &data->res;
4747 task_setup_data.callback_data = data;
4748 if (recovery_type > NFS_LOCK_NEW) {
4749 if (recovery_type == NFS_LOCK_RECLAIM)
4750 data->arg.reclaim = NFS_LOCK_RECLAIM;
4751 nfs4_set_sequence_privileged(&data->arg.seq_args);
4753 task = rpc_run_task(&task_setup_data);
4755 return PTR_ERR(task);
4756 ret = nfs4_wait_for_completion_rpc_task(task);
4758 ret = data->rpc_status;
4760 nfs4_handle_setlk_error(data->server, data->lsp,
4761 data->arg.new_lock_owner, ret);
4763 data->cancelled = 1;
4765 dprintk("%s: done, ret = %d!\n", __func__, ret);
4769 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4771 struct nfs_server *server = NFS_SERVER(state->inode);
4772 struct nfs4_exception exception = {
4773 .inode = state->inode,
4778 /* Cache the lock if possible... */
4779 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4781 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4782 if (err != -NFS4ERR_DELAY)
4784 nfs4_handle_exception(server, err, &exception);
4785 } while (exception.retry);
4789 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4791 struct nfs_server *server = NFS_SERVER(state->inode);
4792 struct nfs4_exception exception = {
4793 .inode = state->inode,
4797 err = nfs4_set_lock_state(state, request);
4801 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4803 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4807 case -NFS4ERR_GRACE:
4808 case -NFS4ERR_DELAY:
4809 nfs4_handle_exception(server, err, &exception);
4812 } while (exception.retry);
4817 #if defined(CONFIG_NFS_V4_1)
4819 * nfs41_check_expired_locks - possibly free a lock stateid
4821 * @state: NFSv4 state for an inode
4823 * Returns NFS_OK if recovery for this stateid is now finished.
4824 * Otherwise a negative NFS4ERR value is returned.
4826 static int nfs41_check_expired_locks(struct nfs4_state *state)
4828 int status, ret = -NFS4ERR_BAD_STATEID;
4829 struct nfs4_lock_state *lsp;
4830 struct nfs_server *server = NFS_SERVER(state->inode);
4832 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4833 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
4834 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4835 if (status != NFS_OK) {
4836 /* Free the stateid unless the server
4837 * informs us the stateid is unrecognized. */
4838 if (status != -NFS4ERR_BAD_STATEID)
4839 nfs41_free_stateid(server,
4841 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
4850 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4852 int status = NFS_OK;
4854 if (test_bit(LK_STATE_IN_USE, &state->flags))
4855 status = nfs41_check_expired_locks(state);
4856 if (status != NFS_OK)
4857 status = nfs4_lock_expired(state, request);
4862 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4864 struct nfs4_state_owner *sp = state->owner;
4865 struct nfs_inode *nfsi = NFS_I(state->inode);
4866 unsigned char fl_flags = request->fl_flags;
4868 int status = -ENOLCK;
4870 if ((fl_flags & FL_POSIX) &&
4871 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4873 /* Is this a delegated open? */
4874 status = nfs4_set_lock_state(state, request);
4877 request->fl_flags |= FL_ACCESS;
4878 status = do_vfs_lock(request->fl_file, request);
4881 down_read(&nfsi->rwsem);
4882 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4883 /* Yes: cache locks! */
4884 /* ...but avoid races with delegation recall... */
4885 request->fl_flags = fl_flags & ~FL_SLEEP;
4886 status = do_vfs_lock(request->fl_file, request);
4889 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
4890 up_read(&nfsi->rwsem);
4891 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4894 down_read(&nfsi->rwsem);
4895 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
4896 status = -NFS4ERR_DELAY;
4899 /* Note: we always want to sleep here! */
4900 request->fl_flags = fl_flags | FL_SLEEP;
4901 if (do_vfs_lock(request->fl_file, request) < 0)
4902 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4903 "manager!\n", __func__);
4905 up_read(&nfsi->rwsem);
4907 request->fl_flags = fl_flags;
4911 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4913 struct nfs4_exception exception = {
4915 .inode = state->inode,
4920 err = _nfs4_proc_setlk(state, cmd, request);
4921 if (err == -NFS4ERR_DENIED)
4923 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4925 } while (exception.retry);
4930 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4932 struct nfs_open_context *ctx;
4933 struct nfs4_state *state;
4934 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4937 /* verify open state */
4938 ctx = nfs_file_open_context(filp);
4941 if (request->fl_start < 0 || request->fl_end < 0)
4944 if (IS_GETLK(cmd)) {
4946 return nfs4_proc_getlk(state, F_GETLK, request);
4950 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4953 if (request->fl_type == F_UNLCK) {
4955 return nfs4_proc_unlck(state, cmd, request);
4962 * Don't rely on the VFS having checked the file open mode,
4963 * since it won't do this for flock() locks.
4965 switch (request->fl_type) {
4967 if (!(filp->f_mode & FMODE_READ))
4971 if (!(filp->f_mode & FMODE_WRITE))
4976 status = nfs4_proc_setlk(state, cmd, request);
4977 if ((status != -EAGAIN) || IS_SETLK(cmd))
4979 timeout = nfs4_set_lock_task_retry(timeout);
4980 status = -ERESTARTSYS;
4983 } while(status < 0);
4987 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4989 struct nfs_server *server = NFS_SERVER(state->inode);
4990 struct nfs4_exception exception = { };
4993 err = nfs4_set_lock_state(state, fl);
4997 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5000 printk(KERN_ERR "NFS: %s: unhandled error "
5001 "%d.\n", __func__, err);
5005 case -NFS4ERR_STALE_CLIENTID:
5006 case -NFS4ERR_STALE_STATEID:
5007 set_bit(NFS_DELEGATED_STATE, &state->flags);
5008 case -NFS4ERR_EXPIRED:
5009 nfs4_schedule_lease_recovery(server->nfs_client);
5012 case -NFS4ERR_BADSESSION:
5013 case -NFS4ERR_BADSLOT:
5014 case -NFS4ERR_BAD_HIGH_SLOT:
5015 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5016 case -NFS4ERR_DEADSESSION:
5017 set_bit(NFS_DELEGATED_STATE, &state->flags);
5018 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
5021 case -NFS4ERR_DELEG_REVOKED:
5022 case -NFS4ERR_ADMIN_REVOKED:
5023 case -NFS4ERR_BAD_STATEID:
5024 case -NFS4ERR_OPENMODE:
5025 nfs4_schedule_stateid_recovery(server, state);
5029 case -NFS4ERR_DENIED:
5030 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5034 set_bit(NFS_DELEGATED_STATE, &state->flags);
5035 err = nfs4_handle_exception(server, err, &exception);
5036 } while (exception.retry);
5041 struct nfs_release_lockowner_data {
5042 struct nfs4_lock_state *lsp;
5043 struct nfs_server *server;
5044 struct nfs_release_lockowner_args args;
5047 static void nfs4_release_lockowner_release(void *calldata)
5049 struct nfs_release_lockowner_data *data = calldata;
5050 nfs4_free_lock_state(data->server, data->lsp);
5054 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
5055 .rpc_release = nfs4_release_lockowner_release,
5058 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
5060 struct nfs_server *server = lsp->ls_state->owner->so_server;
5061 struct nfs_release_lockowner_data *data;
5062 struct rpc_message msg = {
5063 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5066 if (server->nfs_client->cl_mvops->minor_version != 0)
5068 data = kmalloc(sizeof(*data), GFP_NOFS);
5072 data->server = server;
5073 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5074 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5075 data->args.lock_owner.s_dev = server->s_dev;
5076 msg.rpc_argp = &data->args;
5077 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5081 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5083 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5084 const void *buf, size_t buflen,
5085 int flags, int type)
5087 if (strcmp(key, "") != 0)
5090 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5093 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5094 void *buf, size_t buflen, int type)
5096 if (strcmp(key, "") != 0)
5099 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5102 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5103 size_t list_len, const char *name,
5104 size_t name_len, int type)
5106 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5108 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5111 if (list && len <= list_len)
5112 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5117 * nfs_fhget will use either the mounted_on_fileid or the fileid
5119 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5121 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5122 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5123 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5124 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5127 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5128 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5129 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5133 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5134 const struct qstr *name,
5135 struct nfs4_fs_locations *fs_locations,
5138 struct nfs_server *server = NFS_SERVER(dir);
5140 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5142 struct nfs4_fs_locations_arg args = {
5143 .dir_fh = NFS_FH(dir),
5148 struct nfs4_fs_locations_res res = {
5149 .fs_locations = fs_locations,
5151 struct rpc_message msg = {
5152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5158 dprintk("%s: start\n", __func__);
5160 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5161 * is not supported */
5162 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5163 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5165 bitmask[0] |= FATTR4_WORD0_FILEID;
5167 nfs_fattr_init(&fs_locations->fattr);
5168 fs_locations->server = server;
5169 fs_locations->nlocations = 0;
5170 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5171 dprintk("%s: returned status = %d\n", __func__, status);
5175 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5176 const struct qstr *name,
5177 struct nfs4_fs_locations *fs_locations,
5180 struct nfs4_exception exception = { };
5183 err = nfs4_handle_exception(NFS_SERVER(dir),
5184 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5186 } while (exception.retry);
5190 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5193 struct nfs4_secinfo_arg args = {
5194 .dir_fh = NFS_FH(dir),
5197 struct nfs4_secinfo_res res = {
5200 struct rpc_message msg = {
5201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5206 dprintk("NFS call secinfo %s\n", name->name);
5207 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5208 dprintk("NFS reply secinfo: %d\n", status);
5212 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5213 struct nfs4_secinfo_flavors *flavors)
5215 struct nfs4_exception exception = { };
5218 err = nfs4_handle_exception(NFS_SERVER(dir),
5219 _nfs4_proc_secinfo(dir, name, flavors),
5221 } while (exception.retry);
5225 #ifdef CONFIG_NFS_V4_1
5227 * Check the exchange flags returned by the server for invalid flags, having
5228 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5231 static int nfs4_check_cl_exchange_flags(u32 flags)
5233 if (flags & ~EXCHGID4_FLAG_MASK_R)
5235 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5236 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5238 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5242 return -NFS4ERR_INVAL;
5246 nfs41_same_server_scope(struct nfs41_server_scope *a,
5247 struct nfs41_server_scope *b)
5249 if (a->server_scope_sz == b->server_scope_sz &&
5250 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5257 * nfs4_proc_bind_conn_to_session()
5259 * The 4.1 client currently uses the same TCP connection for the
5260 * fore and backchannel.
5262 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5265 struct nfs41_bind_conn_to_session_res res;
5266 struct rpc_message msg = {
5268 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5274 dprintk("--> %s\n", __func__);
5276 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5277 if (unlikely(res.session == NULL)) {
5282 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5284 if (memcmp(res.session->sess_id.data,
5285 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5286 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5290 if (res.dir != NFS4_CDFS4_BOTH) {
5291 dprintk("NFS: %s: Unexpected direction from server\n",
5296 if (res.use_conn_in_rdma_mode) {
5297 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5306 dprintk("<-- %s status= %d\n", __func__, status);
5311 * nfs4_proc_exchange_id()
5313 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5315 * Since the clientid has expired, all compounds using sessions
5316 * associated with the stale clientid will be returning
5317 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5318 * be in some phase of session reset.
5320 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5322 nfs4_verifier verifier;
5323 struct nfs41_exchange_id_args args = {
5324 .verifier = &verifier,
5326 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5328 struct nfs41_exchange_id_res res = {
5332 struct rpc_message msg = {
5333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5339 nfs4_init_boot_verifier(clp, &verifier);
5340 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5342 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5343 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5344 args.id_len, args.id);
5346 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5348 if (unlikely(res.server_owner == NULL)) {
5353 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5355 if (unlikely(res.server_scope == NULL)) {
5357 goto out_server_owner;
5360 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5361 if (unlikely(res.impl_id == NULL)) {
5363 goto out_server_scope;
5366 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5368 status = nfs4_check_cl_exchange_flags(res.flags);
5371 clp->cl_clientid = res.clientid;
5372 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5373 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5374 clp->cl_seqid = res.seqid;
5376 kfree(clp->cl_serverowner);
5377 clp->cl_serverowner = res.server_owner;
5378 res.server_owner = NULL;
5380 /* use the most recent implementation id */
5381 kfree(clp->cl_implid);
5382 clp->cl_implid = res.impl_id;
5384 if (clp->cl_serverscope != NULL &&
5385 !nfs41_same_server_scope(clp->cl_serverscope,
5386 res.server_scope)) {
5387 dprintk("%s: server_scope mismatch detected\n",
5389 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5390 kfree(clp->cl_serverscope);
5391 clp->cl_serverscope = NULL;
5394 if (clp->cl_serverscope == NULL) {
5395 clp->cl_serverscope = res.server_scope;
5402 kfree(res.server_owner);
5404 kfree(res.server_scope);
5406 if (clp->cl_implid != NULL)
5407 dprintk("NFS reply exchange_id: Server Implementation ID: "
5408 "domain: %s, name: %s, date: %llu,%u\n",
5409 clp->cl_implid->domain, clp->cl_implid->name,
5410 clp->cl_implid->date.seconds,
5411 clp->cl_implid->date.nseconds);
5412 dprintk("NFS reply exchange_id: %d\n", status);
5416 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5417 struct rpc_cred *cred)
5419 struct rpc_message msg = {
5420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5426 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5428 dprintk("NFS: Got error %d from the server %s on "
5429 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5433 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5434 struct rpc_cred *cred)
5439 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5440 ret = _nfs4_proc_destroy_clientid(clp, cred);
5442 case -NFS4ERR_DELAY:
5443 case -NFS4ERR_CLIENTID_BUSY:
5453 int nfs4_destroy_clientid(struct nfs_client *clp)
5455 struct rpc_cred *cred;
5458 if (clp->cl_mvops->minor_version < 1)
5460 if (clp->cl_exchange_flags == 0)
5462 if (clp->cl_preserve_clid)
5464 cred = nfs4_get_exchange_id_cred(clp);
5465 ret = nfs4_proc_destroy_clientid(clp, cred);
5470 case -NFS4ERR_STALE_CLIENTID:
5471 clp->cl_exchange_flags = 0;
5477 struct nfs4_get_lease_time_data {
5478 struct nfs4_get_lease_time_args *args;
5479 struct nfs4_get_lease_time_res *res;
5480 struct nfs_client *clp;
5483 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5486 struct nfs4_get_lease_time_data *data =
5487 (struct nfs4_get_lease_time_data *)calldata;
5489 dprintk("--> %s\n", __func__);
5490 /* just setup sequence, do not trigger session recovery
5491 since we're invoked within one */
5492 nfs41_setup_sequence(data->clp->cl_session,
5493 &data->args->la_seq_args,
5494 &data->res->lr_seq_res,
5496 dprintk("<-- %s\n", __func__);
5500 * Called from nfs4_state_manager thread for session setup, so don't recover
5501 * from sequence operation or clientid errors.
5503 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5505 struct nfs4_get_lease_time_data *data =
5506 (struct nfs4_get_lease_time_data *)calldata;
5508 dprintk("--> %s\n", __func__);
5509 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5511 switch (task->tk_status) {
5512 case -NFS4ERR_DELAY:
5513 case -NFS4ERR_GRACE:
5514 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5515 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5516 task->tk_status = 0;
5518 case -NFS4ERR_RETRY_UNCACHED_REP:
5519 rpc_restart_call_prepare(task);
5522 dprintk("<-- %s\n", __func__);
5525 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5526 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5527 .rpc_call_done = nfs4_get_lease_time_done,
5530 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5532 struct rpc_task *task;
5533 struct nfs4_get_lease_time_args args;
5534 struct nfs4_get_lease_time_res res = {
5535 .lr_fsinfo = fsinfo,
5537 struct nfs4_get_lease_time_data data = {
5542 struct rpc_message msg = {
5543 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5547 struct rpc_task_setup task_setup = {
5548 .rpc_client = clp->cl_rpcclient,
5549 .rpc_message = &msg,
5550 .callback_ops = &nfs4_get_lease_time_ops,
5551 .callback_data = &data,
5552 .flags = RPC_TASK_TIMEOUT,
5556 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5557 nfs4_set_sequence_privileged(&args.la_seq_args);
5558 dprintk("--> %s\n", __func__);
5559 task = rpc_run_task(&task_setup);
5562 status = PTR_ERR(task);
5564 status = task->tk_status;
5567 dprintk("<-- %s return %d\n", __func__, status);
5573 * Initialize the values to be used by the client in CREATE_SESSION
5574 * If nfs4_init_session set the fore channel request and response sizes,
5577 * Set the back channel max_resp_sz_cached to zero to force the client to
5578 * always set csa_cachethis to FALSE because the current implementation
5579 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5581 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5583 struct nfs4_session *session = args->client->cl_session;
5584 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5585 mxresp_sz = session->fc_target_max_resp_sz;
5588 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5590 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5591 /* Fore channel attributes */
5592 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5593 args->fc_attrs.max_resp_sz = mxresp_sz;
5594 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5595 args->fc_attrs.max_reqs = max_session_slots;
5597 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5598 "max_ops=%u max_reqs=%u\n",
5600 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5601 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5603 /* Back channel attributes */
5604 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5605 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5606 args->bc_attrs.max_resp_sz_cached = 0;
5607 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5608 args->bc_attrs.max_reqs = 1;
5610 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5611 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5613 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5614 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5615 args->bc_attrs.max_reqs);
5618 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5620 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5621 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5623 if (rcvd->max_resp_sz > sent->max_resp_sz)
5626 * Our requested max_ops is the minimum we need; we're not
5627 * prepared to break up compounds into smaller pieces than that.
5628 * So, no point even trying to continue if the server won't
5631 if (rcvd->max_ops < sent->max_ops)
5633 if (rcvd->max_reqs == 0)
5635 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5636 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5640 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5642 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5643 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5645 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5647 if (rcvd->max_resp_sz < sent->max_resp_sz)
5649 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5651 /* These would render the backchannel useless: */
5652 if (rcvd->max_ops != sent->max_ops)
5654 if (rcvd->max_reqs != sent->max_reqs)
5659 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5660 struct nfs4_session *session)
5664 ret = nfs4_verify_fore_channel_attrs(args, session);
5667 return nfs4_verify_back_channel_attrs(args, session);
5670 static int _nfs4_proc_create_session(struct nfs_client *clp,
5671 struct rpc_cred *cred)
5673 struct nfs4_session *session = clp->cl_session;
5674 struct nfs41_create_session_args args = {
5676 .cb_program = NFS4_CALLBACK,
5678 struct nfs41_create_session_res res = {
5681 struct rpc_message msg = {
5682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5689 nfs4_init_channel_attrs(&args);
5690 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5692 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5695 /* Verify the session's negotiated channel_attrs values */
5696 status = nfs4_verify_channel_attrs(&args, session);
5697 /* Increment the clientid slot sequence id */
5705 * Issues a CREATE_SESSION operation to the server.
5706 * It is the responsibility of the caller to verify the session is
5707 * expired before calling this routine.
5709 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5713 struct nfs4_session *session = clp->cl_session;
5715 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5717 status = _nfs4_proc_create_session(clp, cred);
5721 /* Init or reset the session slot tables */
5722 status = nfs4_setup_session_slot_tables(session);
5723 dprintk("slot table setup returned %d\n", status);
5727 ptr = (unsigned *)&session->sess_id.data[0];
5728 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5729 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5731 dprintk("<-- %s\n", __func__);
5736 * Issue the over-the-wire RPC DESTROY_SESSION.
5737 * The caller must serialize access to this routine.
5739 int nfs4_proc_destroy_session(struct nfs4_session *session,
5740 struct rpc_cred *cred)
5742 struct rpc_message msg = {
5743 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5744 .rpc_argp = session,
5749 dprintk("--> nfs4_proc_destroy_session\n");
5751 /* session is still being setup */
5752 if (session->clp->cl_cons_state != NFS_CS_READY)
5755 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5758 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
5759 "Session has been destroyed regardless...\n", status);
5761 dprintk("<-- nfs4_proc_destroy_session\n");
5766 * Renew the cl_session lease.
5768 struct nfs4_sequence_data {
5769 struct nfs_client *clp;
5770 struct nfs4_sequence_args args;
5771 struct nfs4_sequence_res res;
5774 static void nfs41_sequence_release(void *data)
5776 struct nfs4_sequence_data *calldata = data;
5777 struct nfs_client *clp = calldata->clp;
5779 if (atomic_read(&clp->cl_count) > 1)
5780 nfs4_schedule_state_renewal(clp);
5781 nfs_put_client(clp);
5785 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5787 switch(task->tk_status) {
5788 case -NFS4ERR_DELAY:
5789 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5792 nfs4_schedule_lease_recovery(clp);
5797 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5799 struct nfs4_sequence_data *calldata = data;
5800 struct nfs_client *clp = calldata->clp;
5802 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5805 if (task->tk_status < 0) {
5806 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5807 if (atomic_read(&clp->cl_count) == 1)
5810 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5811 rpc_restart_call_prepare(task);
5815 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5817 dprintk("<-- %s\n", __func__);
5820 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5822 struct nfs4_sequence_data *calldata = data;
5823 struct nfs_client *clp = calldata->clp;
5824 struct nfs4_sequence_args *args;
5825 struct nfs4_sequence_res *res;
5827 args = task->tk_msg.rpc_argp;
5828 res = task->tk_msg.rpc_resp;
5830 nfs41_setup_sequence(clp->cl_session, args, res, task);
5833 static const struct rpc_call_ops nfs41_sequence_ops = {
5834 .rpc_call_done = nfs41_sequence_call_done,
5835 .rpc_call_prepare = nfs41_sequence_prepare,
5836 .rpc_release = nfs41_sequence_release,
5839 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5840 struct rpc_cred *cred,
5843 struct nfs4_sequence_data *calldata;
5844 struct rpc_message msg = {
5845 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5848 struct rpc_task_setup task_setup_data = {
5849 .rpc_client = clp->cl_rpcclient,
5850 .rpc_message = &msg,
5851 .callback_ops = &nfs41_sequence_ops,
5852 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5855 if (!atomic_inc_not_zero(&clp->cl_count))
5856 return ERR_PTR(-EIO);
5857 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5858 if (calldata == NULL) {
5859 nfs_put_client(clp);
5860 return ERR_PTR(-ENOMEM);
5862 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5864 nfs4_set_sequence_privileged(&calldata->args);
5865 msg.rpc_argp = &calldata->args;
5866 msg.rpc_resp = &calldata->res;
5867 calldata->clp = clp;
5868 task_setup_data.callback_data = calldata;
5870 return rpc_run_task(&task_setup_data);
5873 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5875 struct rpc_task *task;
5878 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5880 task = _nfs41_proc_sequence(clp, cred, false);
5882 ret = PTR_ERR(task);
5884 rpc_put_task_async(task);
5885 dprintk("<-- %s status=%d\n", __func__, ret);
5889 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5891 struct rpc_task *task;
5894 task = _nfs41_proc_sequence(clp, cred, true);
5896 ret = PTR_ERR(task);
5899 ret = rpc_wait_for_completion_task(task);
5901 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5903 if (task->tk_status == 0)
5904 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5905 ret = task->tk_status;
5909 dprintk("<-- %s status=%d\n", __func__, ret);
5913 struct nfs4_reclaim_complete_data {
5914 struct nfs_client *clp;
5915 struct nfs41_reclaim_complete_args arg;
5916 struct nfs41_reclaim_complete_res res;
5919 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5921 struct nfs4_reclaim_complete_data *calldata = data;
5923 nfs41_setup_sequence(calldata->clp->cl_session,
5924 &calldata->arg.seq_args,
5925 &calldata->res.seq_res,
5929 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5931 switch(task->tk_status) {
5933 case -NFS4ERR_COMPLETE_ALREADY:
5934 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5936 case -NFS4ERR_DELAY:
5937 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5939 case -NFS4ERR_RETRY_UNCACHED_REP:
5942 nfs4_schedule_lease_recovery(clp);
5947 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5949 struct nfs4_reclaim_complete_data *calldata = data;
5950 struct nfs_client *clp = calldata->clp;
5951 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5953 dprintk("--> %s\n", __func__);
5954 if (!nfs41_sequence_done(task, res))
5957 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5958 rpc_restart_call_prepare(task);
5961 dprintk("<-- %s\n", __func__);
5964 static void nfs4_free_reclaim_complete_data(void *data)
5966 struct nfs4_reclaim_complete_data *calldata = data;
5971 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5972 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5973 .rpc_call_done = nfs4_reclaim_complete_done,
5974 .rpc_release = nfs4_free_reclaim_complete_data,
5978 * Issue a global reclaim complete.
5980 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5982 struct nfs4_reclaim_complete_data *calldata;
5983 struct rpc_task *task;
5984 struct rpc_message msg = {
5985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5987 struct rpc_task_setup task_setup_data = {
5988 .rpc_client = clp->cl_rpcclient,
5989 .rpc_message = &msg,
5990 .callback_ops = &nfs4_reclaim_complete_call_ops,
5991 .flags = RPC_TASK_ASYNC,
5993 int status = -ENOMEM;
5995 dprintk("--> %s\n", __func__);
5996 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5997 if (calldata == NULL)
5999 calldata->clp = clp;
6000 calldata->arg.one_fs = 0;
6002 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6003 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
6004 msg.rpc_argp = &calldata->arg;
6005 msg.rpc_resp = &calldata->res;
6006 task_setup_data.callback_data = calldata;
6007 task = rpc_run_task(&task_setup_data);
6009 status = PTR_ERR(task);
6012 status = nfs4_wait_for_completion_rpc_task(task);
6014 status = task->tk_status;
6018 dprintk("<-- %s status=%d\n", __func__, status);
6023 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6025 struct nfs4_layoutget *lgp = calldata;
6026 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6027 struct nfs4_session *session = nfs4_get_session(server);
6029 dprintk("--> %s\n", __func__);
6030 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6031 * right now covering the LAYOUTGET we are about to send.
6032 * However, that is not so catastrophic, and there seems
6033 * to be no way to prevent it completely.
6035 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
6036 &lgp->res.seq_res, task))
6038 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6039 NFS_I(lgp->args.inode)->layout,
6040 lgp->args.ctx->state)) {
6041 rpc_exit(task, NFS4_OK);
6045 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6047 struct nfs4_layoutget *lgp = calldata;
6048 struct inode *inode = lgp->args.inode;
6049 struct nfs_server *server = NFS_SERVER(inode);
6050 struct pnfs_layout_hdr *lo;
6051 struct nfs4_state *state = NULL;
6052 unsigned long timeo, giveup;
6054 dprintk("--> %s\n", __func__);
6056 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
6059 switch (task->tk_status) {
6062 case -NFS4ERR_LAYOUTTRYLATER:
6063 case -NFS4ERR_RECALLCONFLICT:
6064 timeo = rpc_get_timeout(task->tk_client);
6065 giveup = lgp->args.timestamp + timeo;
6066 if (time_after(giveup, jiffies))
6067 task->tk_status = -NFS4ERR_DELAY;
6069 case -NFS4ERR_EXPIRED:
6070 case -NFS4ERR_BAD_STATEID:
6071 spin_lock(&inode->i_lock);
6072 lo = NFS_I(inode)->layout;
6073 if (!lo || list_empty(&lo->plh_segs)) {
6074 spin_unlock(&inode->i_lock);
6075 /* If the open stateid was bad, then recover it. */
6076 state = lgp->args.ctx->state;
6080 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6081 spin_unlock(&inode->i_lock);
6082 /* Mark the bad layout state as invalid, then
6083 * retry using the open stateid. */
6084 pnfs_free_lseg_list(&head);
6087 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6088 rpc_restart_call_prepare(task);
6090 dprintk("<-- %s\n", __func__);
6093 static size_t max_response_pages(struct nfs_server *server)
6095 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6096 return nfs_page_array_len(0, max_resp_sz);
6099 static void nfs4_free_pages(struct page **pages, size_t size)
6106 for (i = 0; i < size; i++) {
6109 __free_page(pages[i]);
6114 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6116 struct page **pages;
6119 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6121 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6125 for (i = 0; i < size; i++) {
6126 pages[i] = alloc_page(gfp_flags);
6128 dprintk("%s: failed to allocate page\n", __func__);
6129 nfs4_free_pages(pages, size);
6137 static void nfs4_layoutget_release(void *calldata)
6139 struct nfs4_layoutget *lgp = calldata;
6140 struct inode *inode = lgp->args.inode;
6141 struct nfs_server *server = NFS_SERVER(inode);
6142 size_t max_pages = max_response_pages(server);
6144 dprintk("--> %s\n", __func__);
6145 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6146 pnfs_put_layout_hdr(NFS_I(inode)->layout);
6147 put_nfs_open_context(lgp->args.ctx);
6149 dprintk("<-- %s\n", __func__);
6152 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6153 .rpc_call_prepare = nfs4_layoutget_prepare,
6154 .rpc_call_done = nfs4_layoutget_done,
6155 .rpc_release = nfs4_layoutget_release,
6158 struct pnfs_layout_segment *
6159 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6161 struct inode *inode = lgp->args.inode;
6162 struct nfs_server *server = NFS_SERVER(inode);
6163 size_t max_pages = max_response_pages(server);
6164 struct rpc_task *task;
6165 struct rpc_message msg = {
6166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6167 .rpc_argp = &lgp->args,
6168 .rpc_resp = &lgp->res,
6170 struct rpc_task_setup task_setup_data = {
6171 .rpc_client = server->client,
6172 .rpc_message = &msg,
6173 .callback_ops = &nfs4_layoutget_call_ops,
6174 .callback_data = lgp,
6175 .flags = RPC_TASK_ASYNC,
6177 struct pnfs_layout_segment *lseg = NULL;
6180 dprintk("--> %s\n", __func__);
6182 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6183 if (!lgp->args.layout.pages) {
6184 nfs4_layoutget_release(lgp);
6185 return ERR_PTR(-ENOMEM);
6187 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6188 lgp->args.timestamp = jiffies;
6190 lgp->res.layoutp = &lgp->args.layout;
6191 lgp->res.seq_res.sr_slot = NULL;
6192 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6194 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6195 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6197 task = rpc_run_task(&task_setup_data);
6199 return ERR_CAST(task);
6200 status = nfs4_wait_for_completion_rpc_task(task);
6202 status = task->tk_status;
6203 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6204 if (status == 0 && lgp->res.layoutp->len)
6205 lseg = pnfs_layout_process(lgp);
6207 dprintk("<-- %s status=%d\n", __func__, status);
6209 return ERR_PTR(status);
6214 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6216 struct nfs4_layoutreturn *lrp = calldata;
6218 dprintk("--> %s\n", __func__);
6219 nfs41_setup_sequence(lrp->clp->cl_session,
6220 &lrp->args.seq_args,
6225 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6227 struct nfs4_layoutreturn *lrp = calldata;
6228 struct nfs_server *server;
6230 dprintk("--> %s\n", __func__);
6232 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
6235 server = NFS_SERVER(lrp->args.inode);
6236 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6237 rpc_restart_call_prepare(task);
6240 dprintk("<-- %s\n", __func__);
6243 static void nfs4_layoutreturn_release(void *calldata)
6245 struct nfs4_layoutreturn *lrp = calldata;
6246 struct pnfs_layout_hdr *lo = lrp->args.layout;
6248 dprintk("--> %s\n", __func__);
6249 spin_lock(&lo->plh_inode->i_lock);
6250 if (lrp->res.lrs_present)
6251 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6252 lo->plh_block_lgets--;
6253 spin_unlock(&lo->plh_inode->i_lock);
6254 pnfs_put_layout_hdr(lrp->args.layout);
6256 dprintk("<-- %s\n", __func__);
6259 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6260 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6261 .rpc_call_done = nfs4_layoutreturn_done,
6262 .rpc_release = nfs4_layoutreturn_release,
6265 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6267 struct rpc_task *task;
6268 struct rpc_message msg = {
6269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6270 .rpc_argp = &lrp->args,
6271 .rpc_resp = &lrp->res,
6273 struct rpc_task_setup task_setup_data = {
6274 .rpc_client = lrp->clp->cl_rpcclient,
6275 .rpc_message = &msg,
6276 .callback_ops = &nfs4_layoutreturn_call_ops,
6277 .callback_data = lrp,
6281 dprintk("--> %s\n", __func__);
6282 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6283 task = rpc_run_task(&task_setup_data);
6285 return PTR_ERR(task);
6286 status = task->tk_status;
6287 dprintk("<-- %s status=%d\n", __func__, status);
6293 * Retrieve the list of Data Server devices from the MDS.
6295 static int _nfs4_getdevicelist(struct nfs_server *server,
6296 const struct nfs_fh *fh,
6297 struct pnfs_devicelist *devlist)
6299 struct nfs4_getdevicelist_args args = {
6301 .layoutclass = server->pnfs_curr_ld->id,
6303 struct nfs4_getdevicelist_res res = {
6306 struct rpc_message msg = {
6307 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6313 dprintk("--> %s\n", __func__);
6314 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6316 dprintk("<-- %s status=%d\n", __func__, status);
6320 int nfs4_proc_getdevicelist(struct nfs_server *server,
6321 const struct nfs_fh *fh,
6322 struct pnfs_devicelist *devlist)
6324 struct nfs4_exception exception = { };
6328 err = nfs4_handle_exception(server,
6329 _nfs4_getdevicelist(server, fh, devlist),
6331 } while (exception.retry);
6333 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6334 err, devlist->num_devs);
6338 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6341 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6343 struct nfs4_getdeviceinfo_args args = {
6346 struct nfs4_getdeviceinfo_res res = {
6349 struct rpc_message msg = {
6350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6356 dprintk("--> %s\n", __func__);
6357 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6358 dprintk("<-- %s status=%d\n", __func__, status);
6363 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6365 struct nfs4_exception exception = { };
6369 err = nfs4_handle_exception(server,
6370 _nfs4_proc_getdeviceinfo(server, pdev),
6372 } while (exception.retry);
6375 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6377 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6379 struct nfs4_layoutcommit_data *data = calldata;
6380 struct nfs_server *server = NFS_SERVER(data->args.inode);
6381 struct nfs4_session *session = nfs4_get_session(server);
6383 nfs41_setup_sequence(session,
6384 &data->args.seq_args,
6390 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6392 struct nfs4_layoutcommit_data *data = calldata;
6393 struct nfs_server *server = NFS_SERVER(data->args.inode);
6395 if (!nfs41_sequence_done(task, &data->res.seq_res))
6398 switch (task->tk_status) { /* Just ignore these failures */
6399 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6400 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6401 case -NFS4ERR_BADLAYOUT: /* no layout */
6402 case -NFS4ERR_GRACE: /* loca_recalim always false */
6403 task->tk_status = 0;
6406 nfs_post_op_update_inode_force_wcc(data->args.inode,
6410 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6411 rpc_restart_call_prepare(task);
6417 static void nfs4_layoutcommit_release(void *calldata)
6419 struct nfs4_layoutcommit_data *data = calldata;
6421 pnfs_cleanup_layoutcommit(data);
6422 put_rpccred(data->cred);
6426 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6427 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6428 .rpc_call_done = nfs4_layoutcommit_done,
6429 .rpc_release = nfs4_layoutcommit_release,
6433 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6435 struct rpc_message msg = {
6436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6437 .rpc_argp = &data->args,
6438 .rpc_resp = &data->res,
6439 .rpc_cred = data->cred,
6441 struct rpc_task_setup task_setup_data = {
6442 .task = &data->task,
6443 .rpc_client = NFS_CLIENT(data->args.inode),
6444 .rpc_message = &msg,
6445 .callback_ops = &nfs4_layoutcommit_ops,
6446 .callback_data = data,
6447 .flags = RPC_TASK_ASYNC,
6449 struct rpc_task *task;
6452 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6453 "lbw: %llu inode %lu\n",
6454 data->task.tk_pid, sync,
6455 data->args.lastbytewritten,
6456 data->args.inode->i_ino);
6458 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6459 task = rpc_run_task(&task_setup_data);
6461 return PTR_ERR(task);
6464 status = nfs4_wait_for_completion_rpc_task(task);
6467 status = task->tk_status;
6469 dprintk("%s: status %d\n", __func__, status);
6475 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6476 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6478 struct nfs41_secinfo_no_name_args args = {
6479 .style = SECINFO_STYLE_CURRENT_FH,
6481 struct nfs4_secinfo_res res = {
6484 struct rpc_message msg = {
6485 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6489 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6493 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6494 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6496 struct nfs4_exception exception = { };
6499 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6502 case -NFS4ERR_WRONGSEC:
6503 case -NFS4ERR_NOTSUPP:
6506 err = nfs4_handle_exception(server, err, &exception);
6508 } while (exception.retry);
6514 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6515 struct nfs_fsinfo *info)
6519 rpc_authflavor_t flavor;
6520 struct nfs4_secinfo_flavors *flavors;
6522 page = alloc_page(GFP_KERNEL);
6528 flavors = page_address(page);
6529 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6532 * Fall back on "guess and check" method if
6533 * the server doesn't support SECINFO_NO_NAME
6535 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6536 err = nfs4_find_root_sec(server, fhandle, info);
6542 flavor = nfs_find_best_sec(flavors);
6544 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6554 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6557 struct nfs41_test_stateid_args args = {
6560 struct nfs41_test_stateid_res res;
6561 struct rpc_message msg = {
6562 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6567 dprintk("NFS call test_stateid %p\n", stateid);
6568 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6569 nfs4_set_sequence_privileged(&args.seq_args);
6570 status = nfs4_call_sync_sequence(server->client, server, &msg,
6571 &args.seq_args, &res.seq_res);
6572 if (status != NFS_OK) {
6573 dprintk("NFS reply test_stateid: failed, %d\n", status);
6576 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
6581 * nfs41_test_stateid - perform a TEST_STATEID operation
6583 * @server: server / transport on which to perform the operation
6584 * @stateid: state ID to test
6586 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6587 * Otherwise a negative NFS4ERR value is returned if the operation
6588 * failed or the state ID is not currently valid.
6590 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6592 struct nfs4_exception exception = { };
6595 err = _nfs41_test_stateid(server, stateid);
6596 if (err != -NFS4ERR_DELAY)
6598 nfs4_handle_exception(server, err, &exception);
6599 } while (exception.retry);
6603 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6605 struct nfs41_free_stateid_args args = {
6608 struct nfs41_free_stateid_res res;
6609 struct rpc_message msg = {
6610 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6616 dprintk("NFS call free_stateid %p\n", stateid);
6617 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6618 nfs4_set_sequence_privileged(&args.seq_args);
6619 status = nfs4_call_sync_sequence(server->client, server, &msg,
6620 &args.seq_args, &res.seq_res);
6621 dprintk("NFS reply free_stateid: %d\n", status);
6626 * nfs41_free_stateid - perform a FREE_STATEID operation
6628 * @server: server / transport on which to perform the operation
6629 * @stateid: state ID to release
6631 * Returns NFS_OK if the server freed "stateid". Otherwise a
6632 * negative NFS4ERR value is returned.
6634 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6636 struct nfs4_exception exception = { };
6639 err = _nfs4_free_stateid(server, stateid);
6640 if (err != -NFS4ERR_DELAY)
6642 nfs4_handle_exception(server, err, &exception);
6643 } while (exception.retry);
6647 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6648 const nfs4_stateid *s2)
6650 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6653 if (s1->seqid == s2->seqid)
6655 if (s1->seqid == 0 || s2->seqid == 0)
6661 #endif /* CONFIG_NFS_V4_1 */
6663 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6664 const nfs4_stateid *s2)
6666 return nfs4_stateid_match(s1, s2);
6670 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6671 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6672 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6673 .recover_open = nfs4_open_reclaim,
6674 .recover_lock = nfs4_lock_reclaim,
6675 .establish_clid = nfs4_init_clientid,
6676 .get_clid_cred = nfs4_get_setclientid_cred,
6677 .detect_trunking = nfs40_discover_server_trunking,
6680 #if defined(CONFIG_NFS_V4_1)
6681 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6682 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6683 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6684 .recover_open = nfs4_open_reclaim,
6685 .recover_lock = nfs4_lock_reclaim,
6686 .establish_clid = nfs41_init_clientid,
6687 .get_clid_cred = nfs4_get_exchange_id_cred,
6688 .reclaim_complete = nfs41_proc_reclaim_complete,
6689 .detect_trunking = nfs41_discover_server_trunking,
6691 #endif /* CONFIG_NFS_V4_1 */
6693 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6694 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6695 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6696 .recover_open = nfs4_open_expired,
6697 .recover_lock = nfs4_lock_expired,
6698 .establish_clid = nfs4_init_clientid,
6699 .get_clid_cred = nfs4_get_setclientid_cred,
6702 #if defined(CONFIG_NFS_V4_1)
6703 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6704 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6705 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6706 .recover_open = nfs41_open_expired,
6707 .recover_lock = nfs41_lock_expired,
6708 .establish_clid = nfs41_init_clientid,
6709 .get_clid_cred = nfs4_get_exchange_id_cred,
6711 #endif /* CONFIG_NFS_V4_1 */
6713 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6714 .sched_state_renewal = nfs4_proc_async_renew,
6715 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6716 .renew_lease = nfs4_proc_renew,
6719 #if defined(CONFIG_NFS_V4_1)
6720 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6721 .sched_state_renewal = nfs41_proc_async_sequence,
6722 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6723 .renew_lease = nfs4_proc_sequence,
6727 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6729 .call_sync = _nfs4_call_sync,
6730 .match_stateid = nfs4_match_stateid,
6731 .find_root_sec = nfs4_find_root_sec,
6732 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6733 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6734 .state_renewal_ops = &nfs40_state_renewal_ops,
6737 #if defined(CONFIG_NFS_V4_1)
6738 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6740 .call_sync = nfs4_call_sync_sequence,
6741 .match_stateid = nfs41_match_stateid,
6742 .find_root_sec = nfs41_find_root_sec,
6743 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6744 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6745 .state_renewal_ops = &nfs41_state_renewal_ops,
6749 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6750 [0] = &nfs_v4_0_minor_ops,
6751 #if defined(CONFIG_NFS_V4_1)
6752 [1] = &nfs_v4_1_minor_ops,
6756 const struct inode_operations nfs4_dir_inode_operations = {
6757 .create = nfs_create,
6758 .lookup = nfs_lookup,
6759 .atomic_open = nfs_atomic_open,
6761 .unlink = nfs_unlink,
6762 .symlink = nfs_symlink,
6766 .rename = nfs_rename,
6767 .permission = nfs_permission,
6768 .getattr = nfs_getattr,
6769 .setattr = nfs_setattr,
6770 .getxattr = generic_getxattr,
6771 .setxattr = generic_setxattr,
6772 .listxattr = generic_listxattr,
6773 .removexattr = generic_removexattr,
6776 static const struct inode_operations nfs4_file_inode_operations = {
6777 .permission = nfs_permission,
6778 .getattr = nfs_getattr,
6779 .setattr = nfs_setattr,
6780 .getxattr = generic_getxattr,
6781 .setxattr = generic_setxattr,
6782 .listxattr = generic_listxattr,
6783 .removexattr = generic_removexattr,
6786 const struct nfs_rpc_ops nfs_v4_clientops = {
6787 .version = 4, /* protocol version */
6788 .dentry_ops = &nfs4_dentry_operations,
6789 .dir_inode_ops = &nfs4_dir_inode_operations,
6790 .file_inode_ops = &nfs4_file_inode_operations,
6791 .file_ops = &nfs4_file_operations,
6792 .getroot = nfs4_proc_get_root,
6793 .submount = nfs4_submount,
6794 .try_mount = nfs4_try_mount,
6795 .getattr = nfs4_proc_getattr,
6796 .setattr = nfs4_proc_setattr,
6797 .lookup = nfs4_proc_lookup,
6798 .access = nfs4_proc_access,
6799 .readlink = nfs4_proc_readlink,
6800 .create = nfs4_proc_create,
6801 .remove = nfs4_proc_remove,
6802 .unlink_setup = nfs4_proc_unlink_setup,
6803 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
6804 .unlink_done = nfs4_proc_unlink_done,
6805 .rename = nfs4_proc_rename,
6806 .rename_setup = nfs4_proc_rename_setup,
6807 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
6808 .rename_done = nfs4_proc_rename_done,
6809 .link = nfs4_proc_link,
6810 .symlink = nfs4_proc_symlink,
6811 .mkdir = nfs4_proc_mkdir,
6812 .rmdir = nfs4_proc_remove,
6813 .readdir = nfs4_proc_readdir,
6814 .mknod = nfs4_proc_mknod,
6815 .statfs = nfs4_proc_statfs,
6816 .fsinfo = nfs4_proc_fsinfo,
6817 .pathconf = nfs4_proc_pathconf,
6818 .set_capabilities = nfs4_server_capabilities,
6819 .decode_dirent = nfs4_decode_dirent,
6820 .read_setup = nfs4_proc_read_setup,
6821 .read_pageio_init = pnfs_pageio_init_read,
6822 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
6823 .read_done = nfs4_read_done,
6824 .write_setup = nfs4_proc_write_setup,
6825 .write_pageio_init = pnfs_pageio_init_write,
6826 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6827 .write_done = nfs4_write_done,
6828 .commit_setup = nfs4_proc_commit_setup,
6829 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
6830 .commit_done = nfs4_commit_done,
6831 .lock = nfs4_proc_lock,
6832 .clear_acl_cache = nfs4_zap_acl_attr,
6833 .close_context = nfs4_close_context,
6834 .open_context = nfs4_atomic_open,
6835 .have_delegation = nfs4_have_delegation,
6836 .return_delegation = nfs4_inode_return_delegation,
6837 .alloc_client = nfs4_alloc_client,
6838 .init_client = nfs4_init_client,
6839 .free_client = nfs4_free_client,
6840 .create_server = nfs4_create_server,
6841 .clone_server = nfs_clone_server,
6844 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6845 .prefix = XATTR_NAME_NFSV4_ACL,
6846 .list = nfs4_xattr_list_nfs4_acl,
6847 .get = nfs4_xattr_get_nfs4_acl,
6848 .set = nfs4_xattr_set_nfs4_acl,
6851 const struct xattr_handler *nfs4_xattr_handlers[] = {
6852 &nfs4_xattr_nfs4_acl_handler,